Science.gov

Sample records for advisors ag ans

  1. SPILC: An expert student advisor

    NASA Technical Reports Server (NTRS)

    Read, D. R.

    1990-01-01

    The Lamar University Computer Science Department serves about 350 undergraduate C.S. majors, and 70 graduate majors. B.S. degrees are offered in Computer Science and Computer and Information Science, and an M.S. degree is offered in Computer Science. In addition, the Computer Science Department plays a strong service role, offering approximately sixteen service course sections per long semester. The department has eight regular full-time faculty members, including the Department Chairman and the Undergraduate Advisor, and from three to seven part-time faculty members. Due to the small number of regular faculty members and the resulting very heavy teaching loads, undergraduate advising has become a difficult problem for the department. There is a one week early registration period and a three-day regular registration period once each semester. The Undergraduate Advisor's regular teaching load of two classes, 6 - 8 semester hours, per semester, together with the large number of majors and small number of regular faculty, cause long queues and short tempers during these advising periods. The situation is aggravated by the fact that entering freshmen are rarely accompanied by adequate documentation containing the facts necessary for proper counselling. There has been no good method of obtaining necessary facts and documenting both the information provided by the student and the resulting advice offered by the counsellors.

  2. Academic Advisors of Military and Student Veterans: An Ethnographic Study

    ERIC Educational Resources Information Center

    Miller, Michelle A.

    2015-01-01

    With the introduction of the Post-9/11 GI Bill, there is an influx of active-duty military and student veterans enrolling in postsecondary and graduate-level education. The role of an academic advisor increases significantly with this influx of enrollment. The purpose of this study was to determine how a graduate-level academic advisor perceives…

  3. An Aggregation Advisor for Ligand Discovery.

    PubMed

    Irwin, John J; Duan, Da; Torosyan, Hayarpi; Doak, Allison K; Ziebart, Kristin T; Sterling, Teague; Tumanian, Gurgen; Shoichet, Brian K

    2015-09-10

    Colloidal aggregation of organic molecules is the dominant mechanism for artifactual inhibition of proteins, and controls against it are widely deployed. Notwithstanding an increasingly detailed understanding of this phenomenon, a method to reliably predict aggregation has remained elusive. Correspondingly, active molecules that act via aggregation continue to be found in early discovery campaigns and remain common in the literature. Over the past decade, over 12 thousand aggregating organic molecules have been identified, potentially enabling a precedent-based approach to match known aggregators with new molecules that may be expected to aggregate and lead to artifacts. We investigate an approach that uses lipophilicity, affinity, and similarity to known aggregators to advise on the likelihood that a candidate compound is an aggregator. In prospective experimental testing, five of seven new molecules with Tanimoto coefficients (Tc's) between 0.95 and 0.99 to known aggregators aggregated at relevant concentrations. Ten of 19 with Tc's between 0.94 and 0.90 and three of seven with Tc's between 0.89 and 0.85 also aggregated. Another three of the predicted compounds aggregated at higher concentrations. This method finds that 61 827 or 5.1% of the ligands acting in the 0.1 to 10 μM range in the medicinal chemistry literature are at least 85% similar to a known aggregator with these physical properties and may aggregate at relevant concentrations. Intriguingly, only 0.73% of all drug-like commercially available compounds resemble the known aggregators, suggesting that colloidal aggregators are enriched in the literature. As a percentage of the literature, aggregator-like compounds have increased 9-fold since 1995, partly reflecting the advent of high-throughput and virtual screens against molecular targets. Emerging from this study is an aggregator advisor database and tool ( http://advisor.bkslab.org ), free to the community, that may help distinguish between

  4. An intelligent advisor for the design manager

    NASA Technical Reports Server (NTRS)

    Rogers, James L.; Padula, Sharon L.

    1989-01-01

    A design problem is viewed as a complex system divisible into modules. Before the design of a complex system can begin, much time and money are spent in determining the couplings among modules and the presence of iterative loops. This is important because the design manager must know how to group the modules into substems and how to assign subsystems to design teams so that changes in one subsystem will have predictable effects on other subsystems. Determining these subsystems is not an easy, straightforward process and often important couplings are overlooked. Moreover, the planning task must be repeated as new information becomes available or as the design specifications change. The purchase of this research effort is to develop a knowledge-based tool to act as an intelligent advisor for the design manager. This tool identifies the subsystems of a complex design problem, orders them into a well-structured format, and marks the couplings among the subsystems to facilitate the use of multilevel tools. The tool was tested in the decomposition of the COFS (Control of Flexible Structures) mast design which has about 50 modules. This test indicated that this type of approach could lead to a substantial savings by organizing and displaying a complex problem as a sequence of subsystems easily divisible among design teams.

  5. AIDA: an automated insulin dosage advisor.

    PubMed Central

    Lehmann, E. D.; Deutsch, T.

    1992-01-01

    A prototype computer system utilising a model of carbohydrate metabolism linked to an expert system is described. The prototype which integrates quantitative and qualitative computational methodologies can be used to predict blood glucose profiles and adjust insulin doses in type I diabetic subjects. PMID:1482998

  6. WinMod: An expert advisor for investment casting

    SciTech Connect

    Bivens, H.P.; Williamson, G.A. Jr.; Luger, G.F.; Erdmann, R.G.; Maguire, M.C.; Baldwin, M.D.; Anderson, D.J.

    1998-04-01

    Investment casting is an important method for fabricating a variety of high quality components in mechanical systems. Cast components, unfortunately, have a large design and gate/runner build time associated with their fabrication. In addition, casting engineers often require many years of actual experience in order to consistently pour high quality castings. Since 1989, Sandia National Laboratories has been investigating casting technology and software that will reduce the time overhead involved in producing quality casts. Several companies in the casting industry have teamed up with Sandia to form the FASTCAST Consortium. One result of this research and the formation of the FASTCAST consortium is the creation of the WinMod software, an expert casting advisor that supports the decision making process of the casting engineer through visualization and advice to help eliminate possible casting defects.

  7. The CBT Advisor: An Expert System Program for Making Decisions about CBT.

    ERIC Educational Resources Information Center

    Kearsley, Greg

    1985-01-01

    Discusses structure, credibility, and use of the Computer Based Training (CBT) Advisor, an expert system designed to help managers make judgements about course selection, system selection, cost/benefits, development effort, and probable success of CBT projects. (MBR)

  8. LIA: An Intelligent Advisor for E-Learning

    ERIC Educational Resources Information Center

    Capuano, Nicola; Gaeta, Matteo; Marengo, Agostino; Miranda, Sergio; Orciuoli, Francesco; Ritrovato, Pierluigi

    2009-01-01

    Intelligent e-learning systems have revolutionized online education by providing individualized and personalized instruction for each learner. Nevertheless, until now very few systems were able to leave academic laboratories and be integrated into real commercial products. One of these few exceptions is the Learning Intelligent Advisor (LIA)…

  9. The Role of the Graduate-Level Academic Advisor for Military and Student Veterans: An Ethnographic Study

    ERIC Educational Resources Information Center

    Miller, Michelle A.

    2013-01-01

    The role of a graduate-level academic advisor is essential to all levels of higher education. With the introduction of the Post 9/11 GI Bill, there has been an influx of military and student veterans enrolling in postsecondary and graduate-level education programs. The role of the academic advisor has increased significantly with the influx of…

  10. Development of an Expert Resource Network for Students and Advisors Engaging in Authentic Scientific Research

    NASA Astrophysics Data System (ADS)

    Danch, J. M.; Aker-bolin, K.

    2011-12-01

    In an effort to increase the the number of secondary students engaging in authentic scientific research and to improve the quality of that research, an online network of scientists and educators is being established. The Network will be assessable to students and advisors participating in the 2012 Monmouth Junior Science Symposium (MJSS), a scientific forum for New Jersey students, but is intended to serve as a model for use by participants in the additional 47 regional science symposia of which the MJSS is part. Hosted on the MJSS website, the Network will consist of contact information and profiles of scientists, educators and other research professionals willing to assist secondary students and their teacher/advisors perform authentic scientific research. Profiles will include area(s) of expertise and level of participation to which the individual is capable. The set of participating experts will have the potential to expand continually as additional professionals with a variety of backgrounds are recruited over time. The Network will also be made available to members of the New Jersey Science Supervisors Association to encourage school districts not currently participating in the MJSS to involve secondary students in conducting authentic scientific research. The Network's effectiveness will be evaluated by surveys completed by MJSS participants and their teacher/advisors included with their research paper submissions.

  11. Pilot weather advisor

    NASA Technical Reports Server (NTRS)

    Kilgore, W. A.; Seth, S.; Crabill, N. L.; Shipley, S. T.; Graffman, I.; Oneill, J.

    1992-01-01

    The results of the work performed by ViGYAN, Inc., to demonstrate the Pilot Weather Advisor cockpit weather data system using a broadcast satellite communication system are presented. The Pilot Weather Advisor demonstrated that the technical problems involved with transmitting significant amount of weather data to an aircraft in-flight or on-the-ground via satellite are solvable with today's technology. The Pilot Weather Advisor appears to be a viable solution for providing accurate and timely weather information for general aviation aircraft.

  12. Student Satisfaction with Faculty Advisors in an Intrusive Advising Program.

    ERIC Educational Resources Information Center

    Vowell, Faye; Karst, Ronald

    1987-01-01

    The procedures involved in implementing an intrusive advising program at Emporia State University are described. The findings reported are based on a questionnaire designed to assess the effectiveness of the program, including some comments from students who participated. (Author/MLW)

  13. An on-line, intelligent plant economic advisor for total plant optimization

    SciTech Connect

    Bragham, M.; Hunt, M.; Caplan, J.

    1995-06-01

    A key aspect of the total plant optimization problem is the impact that plant operations personnel can have on overall plant efficiency. Usually, plant systems are operated on a system by system basis and operators are tasted primarily with keeping the plant on-line. Though many units have installed on-line performance monitoring systems to help improve thermal efficiency, operators are often relatively ill-informed of the impact their actions can have on plant economic performance. Additionally, the inter-relationships between plant sub-systems are rarely incorporated into operational strategies. In order to truly optimize total plant operation, the impact of, and the inter-relationships between thermal efficiency, plant emissions, and plant materials handling (e.g., waste disposal/sales) must all be simultaneously evaluated. This paper presents the development effort to date for the Plant Economic Optimization Advisor (PEOA). PEOA is an electronic performance support system (EPSS), currently under development by New York State Electric & Gas Corporation (NYSEG) and DHR Technologies, Inc. (DHR). PEOA provides users with on-line control strategies for least cost plant operation. PEOA uses innovative approaches for plant optimization, as well as an intelligent Operations Advisor to help operators achieve optimal plant operation. PEOA also includes on-line data monitoring and analysis tools. The system uses a client/server, object-oriented open architecture that integrates plant information systems and provides support for integration of legacy third party systems such as performance monitors.

  14. The Development of an International Student Advisor: A Grounded Theory Study

    ERIC Educational Resources Information Center

    Sparaco, Kathleen Keenan

    2012-01-01

    This qualitative study explored the professional experience of international student advisors. The statement of problem for this research was that the professional role of international student advisors has not been clearly defined or understood within U.S. higher education. The research questions asked (1) what encompassed the lived experience of…

  15. An intelligent, knowledge-based multiple criteria decision making advisor for systems design

    NASA Astrophysics Data System (ADS)

    Li, Yongchang

    of an appropriate decision making method. Furthermore, some DMs may be exclusively using one or two specific methods which they are familiar with or trust and not realizing that they may be inappropriate to handle certain classes of the problems, thus yielding erroneous results. These issues reveal that in order to ensure a good decision a suitable decision method should be chosen before the decision making process proceeds. The first part of this dissertation proposes an MCDM process supported by an intelligent, knowledge-based advisor system referred to as Multi-Criteria Interactive Decision-Making Advisor and Synthesis process (MIDAS), which is able to facilitate the selection of the most appropriate decision making method and which provides insight to the user for fulfilling different preferences. The second part of this dissertation presents an autonomous decision making advisor which is capable of dealing with ever-evolving real time information and making autonomous decisions under uncertain conditions. The advisor encompasses a Markov Decision Process (MDP) formulation which takes uncertainty into account when determines the best action for each system state. (Abstract shortened by UMI.)

  16. Ethnographic interviews to elicit patients' reactions to an intelligent interactive telephone health behavior advisor system.

    PubMed Central

    Kaplan, B.; Farzanfar, R.; Friedman, R. H.

    1999-01-01

    Information technology is being used to collect data directly from patients and to provide educational information to them. Concern over patient reactions to this use of information technology is especially important in light of the debate over whether computers dehumanize patients. This study reports reactions that patient users expressed in ethnographic interviews about using a computer-based telecommunications system. The interviews were conducted as part of a larger evaluation of Telephone-Linked Care (TLC)-HealthCall, an intelligent interactive telephone advisor, that advised individuals about how to improve their health through changes in diet or exercise. Interview findings suggest that people formed personal relationships with the TLC system. These relationships ranged from feeling guilty about their diet or exercise behavior to feeling love for the voice. The findings raise system design and user interface issues as well as research and ethical questions. PMID:10566420

  17. An on-line, intelligent plant economic advisor for total plant optimization

    SciTech Connect

    Bangham, M.; Hunt, M.; Caplan, J.; Travers, T.; O`Dea, D.; Southard, P.; Vought, A.

    1994-12-31

    A key aspect of the total plant optimization problem is the impact that plant operators can have on overall plant efficiency. Usually, plant systems are operated on a system by system basis and operators are tasked primarily with keeping the plant on-line. Though many units have installed on-line performance monitoring systems to help improve thermal efficiency, operators are often relatively ill-informed of the impact their action can have on plant economic performance. Additionally, the inter-relationships between plant sub-systems are rarely incorporated into operational strategies. in order to truly optimize total plant operation, the impact of, and the inter-relationships between thermal efficiency, plant emissions, and plant materials handling (e.g., waste disposal/sales) must all be simultaneously evaluated. This paper presents the development effort to data for the Plant Economic Optimization Advisor (PEOA). PEOA is an electronic performance support system, currently under development by New York State Electric and Gas Corporation and DHR Technologies, Inc. PEOA provides users with on-line control strategies for achieving least cost plant operation. PEOA uses innovative approaches for plant optimization, as well as an Operations Advisor to guide operators toward optimal plant operation. PEOA also includes on-line data monitoring and analysis tools. The system uses a client/server, object-oriented open architecture that integrates plant information systems and provides support for integration of legacy third party systems, such as performance monitors. PEOA is designed as a low cost addition to legacy performance monitoring systems.

  18. From Diagnosis to Action: An Automated Failure Advisor for Human Deep Space Missions

    NASA Technical Reports Server (NTRS)

    Colombano, Silvano; Spirkovska, Lilly; Baskaran, Vijayakumar; Morris, Paul; Mcdermott, William; Ossenfort, John; Bajwa, Anupa

    2015-01-01

    The major goal of current space system development at NASA is to enable human travel to deep space locations such as Mars and asteroids. At that distance, round trip communication with ground operators may take close to an hour, thus it becomes unfeasible to seek ground operator advice for problems that require immediate attention, either for crew safety or for activities that need to be performed at specific times for the attainment of scientific results. To achieve this goal, major reliance will need to be placed on automation systems capable of aiding the crew in detecting and diagnosing failures, assessing consequences of these failures, and providing guidance in repair activities that may be required. We report here on the most current step in the continuing development of such a system, and that is the addition of a Failure Response Advisor. In simple terms, we have a system in place the Advanced Caution and Warning System (ACAWS) to tell us what happened (failure diagnosis) and what happened because that happened (failure effects). The Failure Response Advisor will tell us what to do about it, how long until something must be done and why its important that something be done and will begin to approach the complex reasoning that is generally required for an optimal approach to automated system health management. This advice is based on the criticality and various timing elements, such as durations of activities and of component repairs, failure effects delay, and other factors. The failure advice is provided to operators (crew and mission controllers) together with the diagnostic and effects information. The operators also have the option to drill down for more information about the failure and the reasons for any suggested priorities.

  19. Advisors as Interaction Designers

    ERIC Educational Resources Information Center

    Shockley-Zalabak, Pamela

    2012-01-01

    Pamela Shockley-Zalabak, Chancellor, University of Colorado Colorado Springs, gave the following speech at the 2011 NACADA Annual Conference October 3, 2011, at the Colorado Convention Center in Denver. She provides an overview of changes affecting U.S. higher education, commentary on how those changes affect the role of the academic advisor, and…

  20. Bridging Horizons. An Advisor's Guide to FFA Involvement for Members with Disabilities.

    ERIC Educational Resources Information Center

    Ploss, Adrienne J.; Field, William E.; Frick, Martin J.

    This guide is designed to provide Future Farmers of America (FFA) advisors with information to assist them in their efforts to include all youth in FFA, including those with disabilities. It addresses benefits of involving youth with disabilities and federal, state, and local legislation and regulations concerning people with disabilities.…

  1. WASTE ANALYSIS PLAN REVIEWER ADVISOR - AN INTELLIGENT DATABASE TO ASSIST RCRA PERMIT REVIEWERS

    EPA Science Inventory

    The Waste Analysis Plan Review Advisor (WAPRA) system assists in the review of the Waste Analysis Plan Section of RCRA Part B facility permit applications. pecifically, this program automates two functions of the waste analysis plan review. irst, the system checks all wastes whic...

  2. WASTE ANALYSIS PLAN REVIEW ADVISOR - AN INTELLIGENT DATABASE TO ASSIST RCRA PERMIT REVIEWERS

    EPA Science Inventory

    The Waste Analysis Plan Review Advisor (WAPRA) system assists in the review of the Waste Analysis Plan Section of RCRA Part B facility permit applications. Specifically, this program automates two functions of the waste analysis plan review. First, the system checks all wastes wh...

  3. The Advisor's Role

    ERIC Educational Resources Information Center

    Norris, Martha A.

    1975-01-01

    A training program for advisors is presented as a support system for implementing the Open Corridor concept into school systems. The following components of the advisor's role are discussed: selection and training, advisor-teacher relationship, work in the classroom, work with principals and parents, and role of teachers. (EC)

  4. The load shedding advisor: An example of a crisis-response expert system

    NASA Technical Reports Server (NTRS)

    Bollinger, Terry B.; Lightner, Eric; Laverty, John; Ambrose, Edward

    1987-01-01

    A Prolog-based prototype expert system is described that was implemented by the Network Operations Branch of the NASA Goddard Space Flight Center. The purpose of the prototype was to test whether a small, inexpensive computer system could be used to host a load shedding advisor, a system which would monitor major physical environment parameters in a computer facility, then recommend appropriate operator reponses whenever a serious condition was detected. The resulting prototype performed significantly to efficiency gains achieved by replacing a purely rule-based design methodology with a hybrid approach that combined procedural, entity-relationship, and rule-based methods.

  5. Pilot Weather Advisor System

    NASA Technical Reports Server (NTRS)

    Lindamood, Glenn; Martzaklis, Konstantinos Gus; Hoffler, Keith; Hill, Damon; Mehrotra, Sudhir C.; White, E. Richard; Fisher, Bruce D.; Crabill, Norman L.; Tucholski, Allen D.

    2006-01-01

    The Pilot Weather Advisor (PWA) system is an automated satellite radio-broadcasting system that provides nearly real-time weather data to pilots of aircraft in flight anywhere in the continental United States. The system was designed to enhance safety in two distinct ways: First, the automated receipt of information would relieve the pilot of the time-consuming and distracting task of obtaining weather information via voice communication with ground stations. Second, the presentation of the information would be centered around a map format, thereby making the spatial and temporal relationships in the surrounding weather situation much easier to understand

  6. A Matter of Alignment: An Organizational Analysis of the Advisor Role in Three Small Urban High Schools

    ERIC Educational Resources Information Center

    Phillippo, Katherine L.

    2009-01-01

    Recent research literature suggests that students benefit from positive relationships with their teachers. Small high schools attempt to formalize expectations for such relationships through a variety of organizational structures, including the advisor role. As advisors, teachers work with a group of students in order to guide and support them.…

  7. 75 FR 54465 - Temporary Registration of Municipal Advisors

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-08

    ... Commission is adopting an interim final temporary rule that establishes a means for municipal advisors, as... becomes effective on October 1, 2010, meaning that municipal advisors must be registered on that date in... Section 975(e) of the Dodd-Frank Act, defines the term ``municipal advisor'' to mean a person (who is...

  8. An efficient photocatalyst for degradation of various organic dyes: Ag@Ag2MoO4-AgBr composite.

    PubMed

    Bai, Yu-Yang; Lu, Yi; Liu, Jin-Ku

    2016-04-15

    The Ag2MoO4-AgBr composite was prepared by a facile in-situ anion-exchange method, then the Ag nanoparticles were coated on this composite through photodeposition route to form a novel Ag@Ag2MoO4-AgBr composite. The in-situ Br(-) replacement in a crystal lattice node position of Ag2MoO4 crystal allows for overcoming the resistance of electron transition effectively. Meanwhile silver nano-particles on the surface of Ag@Ag2MoO4-AgBr composite could act as electron traps to intensify the photogeneration electron-hole separation and the subsequent transfer of the trapped electron to the adsorbed O2 as an electron acceptor. As an efficient visible light catalyst, the Ag@Ag2MoO4-AgBr composite exhibited superior photocatalytic activity for the degradation of various organic dyes. The experimental results demonstrated superior photocatalytic rate of Ag@Ag2MoO4-AgBr composite compared to pure AgBr and Ag2MoO4 crystals (37.6% and 348.4% enhancement respectively). The Ag@Ag2MoO4-AgBr composite cloud degraded Rhodamin B, bromophenol blue, and amino black 10b completed in 7min. PMID:26775100

  9. The Challenges of Field Testing the Traffic Management Advisor (TMA) in an Operational Air Traffic Control Facility

    NASA Technical Reports Server (NTRS)

    Hoang, Ty; Swenson, Harry N.

    1997-01-01

    The Traffic Management Advisor (TMA), the sequence and schedule tool of the Center/TRACON Automation System (CTAS), was evaluated at the Fort Worth Center (ZFW) in the summer of 1996. This paper describes the challenges encountered during the various phases of the TMA field evaluation, which included system (hardware and software) installation, personnel training, and data collection. Operational procedures were developed and applied to the evaluation process that would ensure air safety. The five weeks of field evaluation imposed minimal impact on the hosting facility and provided valuable engineering and human factors data. The collection of data was very much an opportunistic affair, due to dynamic traffic conditions. One measure of the success of the TMA evaluation is that, rather than remove TMA after the evaluation until it could be fully implemented, the prototype TMA is in continual use at ZFW as the fully operational version is readied for implementation.

  10. An insight into the emerging role of regional medical advisor in the pharmaceutical industry.

    PubMed

    Gupta, Sandeep Kumar; Nayak, Roopa P

    2013-07-01

    The position of regional medical advisor (RMA) is relatively new in the pharmaceutical industry and its roles and responsibility are still evolving. The RMA is a field based position whose main mission is to foster collaborative relationships with the key opinion leaders (KOLs) and to facilitate the exchange of unbiased scientific information between the medical community and the company. Field-based medical liaison teams are expanding world-wide as part of the pharmaceutical industry's increased focus on global operations including emerging markets. Now, the position of the RMA has evolved into comprehensive, complex, highly interactive, targeted, highly strategic, innovative, and independent role since its inception by the Upjohn Company in 1967. The major objective of the RMA is to develop the professional relationships with the health-care community, particularly KOLs, through peer-to-peer contact. The RMA can facilitate investigator-initiated clinical research proposals from approval until completion, presentation, and publication. It is possible for a RMA to have valuable access to KOLs through his expertise in the clinical research. The RMA can assist in the development, review, and follow-up of the clinical studies initiated within the relevant therapeutic area at the regional/local level. The RMA can lead regional/local clinical projects to ensure that all clinical trials are conducted in compliance with the International Conference of Harmonisation Good Clinical Practice (ICH GCP) guidelines. PMID:24010061

  11. An insight into the emerging role of regional medical advisor in the pharmaceutical industry

    PubMed Central

    Gupta, Sandeep Kumar; Nayak, Roopa P.

    2013-01-01

    The position of regional medical advisor (RMA) is relatively new in the pharmaceutical industry and its roles and responsibility are still evolving. The RMA is a field based position whose main mission is to foster collaborative relationships with the key opinion leaders (KOLs) and to facilitate the exchange of unbiased scientific information between the medical community and the company. Field-based medical liaison teams are expanding world-wide as part of the pharmaceutical industry's increased focus on global operations including emerging markets. Now, the position of the RMA has evolved into comprehensive, complex, highly interactive, targeted, highly strategic, innovative, and independent role since its inception by the Upjohn Company in 1967. The major objective of the RMA is to develop the professional relationships with the health-care community, particularly KOLs, through peer-to-peer contact. The RMA can facilitate investigator-initiated clinical research proposals from approval until completion, presentation, and publication. It is possible for a RMA to have valuable access to KOLs through his expertise in the clinical research. The RMA can assist in the development, review, and follow-up of the clinical studies initiated within the relevant therapeutic area at the regional/local level. The RMA can lead regional/local clinical projects to ensure that all clinical trials are conducted in compliance with the International Conference of Harmonisation Good Clinical Practice (ICH GCP) guidelines. PMID:24010061

  12. The Building Design Advisor

    SciTech Connect

    Papamichael, K.; LaPorta, J.; Chauvet, H.; Collins, D.; Trzcinski, T.; Thorpe, J.; Selkowitz, S.

    1996-03-01

    The Building Design Advisor (BDA) is a software environment that supports the integrated use of multiple analysis and visualization tools throughout the building design process, from the initial, schematic design phases to the detailed specification of building components and systems. Based on a comprehensive design theory, the BDA uses an object-oriented representation of the building and its context, and acts as a data manager and process controller to allow building designers to quickly navigate through the multitude of descriptive and performance parameters addressed by the analysis and visualization tools linked to the BDA. Through the Browser the user can edit the values of input parameters and select any number of input and/or output parameters for display in the Decision Desktop. The Desktop allows building designers to compare multiple design alternatives with respect to any number of parameters addressed by the tools linked to the BDA.

  13. Safety review advisor

    SciTech Connect

    Boshers, J.A.; Alguindigue, I.E.; Uhrig, R.E. . Dept. of Nuclear Engineering); Burnett, C.G. )

    1989-01-01

    The University of Tennessee's Nuclear Engineering Department, in cooperation with the Tennessee Valley Authority (TVA), is evaluating the feasibility of utilizing an expert system to aid in 10CFR50.59 evaluations. This paper discusses the history of 10CFR50.59 reviews, and details the development approach used in the construction of a prototype Safety Review Advisor (SRA). The goals for this expert system prototype are to (1) aid the engineer in the evaluation process by directing his attention to the appropriate critical issues, (2) increase the efficiency, consistency, and thoroughness of the evaluation process, and (3) provide a foundation of appropriate Safety Analysis Report (SAR) references for the reviewer. 6 refs., 2 figs.

  14. MyFoodAdvisor

    MedlinePlus

    ... Password? Login Cancel Can I eat this? . . . Meal Planning and Tips Managing diabetes is a challenge that ... can make it easier. Discover more about meal planning options and how MyFoodAdvisor can help. Explore Foods ...

  15. System Advisor Model

    2010-03-01

    The System Advisor Model (SAM) is a performance and economic model designed to facilitate decision making for people involved in the renewable energy industry, ranging from project managers and engineers to incentive program designers, technology developers, and researchers.

  16. Threat expert system technology advisor

    NASA Technical Reports Server (NTRS)

    Kurrasch, E. R.; Tripp, L. R.

    1987-01-01

    A prototype expert system was developed to determine the feasibility of using expert system technology to enhance the performance and survivability of helicopter pilots in a combat threat environment while flying NOE (Nap of the Earth) missions. The basis for the concept is the potential of using an Expert System Advisor to reduce the extreme overloading of the pilot who flies NOE mission below treetop level at approximately 40 knots while performing several other functions. The ultimate goal is to develop a Threat Expert System Advisor which provides threat information and advice that are better than even a highly experienced copilot. The results clearly show that the NOE pilot needs all the help in decision aiding and threat situation awareness that he can get. It clearly shows that heuristics are important and that an expert system for combat NOE helicopter missions can be of great help to the pilot in complex threat situations and in making decisions.

  17. Make your physician advisor your closest ally.

    PubMed

    2016-06-01

    As the pressure increases for case managers to help ensure that hospitals comply with payer requirements and get paid appropriately, physician advisors can be a valuable ally. Physician advisors have clinical expertise as well as credibility with the physician staff, which gives them an advantage when it comes to educating physicians about patient status, documentation needs, patient throughput, and transitions in care. Case managers and their physician advisors should work together to ensure that everything in the patient record is correct up front so the hospital will avoid costly appeals when the claim is denied. Good physician advisors have the kind of personality that enables them to have difficult conversations as well as being well-respected by their colleagues, knowledgeable about admission criteria and reimbursement, accessible, approachable, articulate, and collaborative. PMID:27323506

  18. Outcome Effectiveness of the Lay Health Advisor Model among Latinos in the United States: An Examination by Role

    ERIC Educational Resources Information Center

    Ayala, Guadalupe X.; Vaz, Lara; Earp, Jo Anne; Elder, John P.; Cherrington, Andrea

    2010-01-01

    The objective of this study was to examine lay health advisor (LHA) programs designed to promote health among US Latinos and the extent to which educator-only versus educator-plus-bridge programs differed in designs and outcomes achieved. Two independent coders reviewed 128 published articles on LHAs yielding information at two levels: (i) study…

  19. Academic Advisors: The Boundary Spanners.

    ERIC Educational Resources Information Center

    Fitzgerald, Laurine E.

    Perspectives on the roles of academic advisors are considered. It is suggested that academic advisors are often "boundary spanners," those who participate in two or more aspects of the activities of the institution. Academic advisors' functions cut across multidisciplinary lines, affecting curricular decisions and curriculum development, career…

  20. UFC advisor: An AI-based system for the automatic test environment

    NASA Technical Reports Server (NTRS)

    Lincoln, David T.; Fink, Pamela K.

    1990-01-01

    The Air Logistics Command within the Air Force is responsible for maintaining a wide variety of aircraft fleets and weapon systems. To maintain these fleets and systems requires specialized test equipment that provides data concerning the behavior of a particular device. The test equipment is used to 'poke and prod' the device to determine its functionality. The data represent voltages, pressures, torques, temperatures, etc. and are called testpoints. These testpoints can be defined numerically as being in or out of limits/tolerance. Some test equipment is termed 'automatic' because it is computer-controlled. Due to the fact that effective maintenance in the test arena requires a significant amount of expertise, it is an ideal area for the application of knowledge-based system technology. Such a system would take testpoint data, identify values out-of-limits, and determine potential underlying problems based on what is out-of-limits and how far. This paper discusses the application of this technology to a device called the Unified Fuel Control (UFC) which is maintained in this manner.

  1. Training Public Health Advisors

    PubMed Central

    Meyer, Pamela A.; Brusuelas, Kristin M.; Baden, Daniel J.; Duncan, Heather L.

    2015-01-01

    Federal public health advisors provide guidance and assistance to health departments to improve public health program work. The Centers for Disease Control and Prevention (CDC) prepares them with specialized training in administering public health programs. This article describes the evolving training and is based on internal CDC documents and interviews. The first federal public health advisors worked in health departments to assist with controlling syphilis after World War II. Over time, more CDC prevention programs hired them. To meet emerging needs, 3 major changes occurred: the Public Health Prevention Service, a fellowship program, in 1999; the Public Health Associate Program in 2007; and integration of those programs. Key components of the updated training are competency-based training, field experience, supervision, recruitment and retention, and stakeholder support. The enduring strength of the training has been the experience in a public health agency developing practical skills for program implementation and management. PMID:25564995

  2. Training Public Health Advisors.

    PubMed

    Meyer, Pamela A; Brusuelas, Kristin M; Baden, Daniel J; Duncan, Heather L

    2015-01-01

    Federal public health advisors provide guidance and assistance to health departments to improve public health program work. The Centers for Disease Control and Prevention (CDC) prepares them with specialized training in administering public health programs. This article describes the evolving training and is based on internal CDC documents and interviews. The first federal public health advisors worked in health departments to assist with controlling syphilis after World War II. Over time, more CDC prevention programs hired them. To meet emerging needs, 3 major changes occurred: the Public Health Prevention Service, a fellowship program, in 1999; the Public Health Associate Program in 2007; and integration of those programs. Key components of the updated training are competency-based training, field experience, supervision, recruitment and retention, and stakeholder support. The enduring strength of the training has been the experience in a public health agency developing practical skills for program implementation and management. PMID:25564995

  3. Critics and advisors: Heuristic knowledge and manufacturability

    SciTech Connect

    Rivera, J.J.; Stubblefield, W.A.; Ames, A.L.

    1996-06-01

    In recent years, much of the progress in Computer-Aided Manufacturing has emphasized the use of simulation, finite-element analysis, and other science-based techniques to plan and evaluate manufacturing processes. These approaches are all based on the idea that we can build sufficiently faithful models of complex manufacturing processes such as machining, welding, and casting. Although there has been considerable progress in this area, it continues to suffer from difficulties: the first of these is that the kind of highly accurate models that this approach requires may take many person months to construct, and the second is the large amount of computing resources needed to run these simulations. Two design advisors, Near Net-Shape Advisor and Design for Machinability Advisor, are being developed to explore the role of heuristic, knowledge-based systems for manufacturing processes, both as an alternative to more analytical techniques, and also in support of these techniques. Currently the advisors are both in the prototype stage. All indications lead to the conclusion that the advisors will be successful and lay the groundwork for additional systems such as these in the future.

  4. Surface Hold Advisor Using Critical Sections

    NASA Technical Reports Server (NTRS)

    Law, Caleb Hoi Kei (Inventor); Hsiao, Thomas Kun-Lung (Inventor); Mittler, Nathan C. (Inventor); Couluris, George J. (Inventor)

    2013-01-01

    The Surface Hold Advisor Using Critical Sections is a system and method for providing hold advisories to surface controllers to prevent gridlock and resolve crossing and merging conflicts among vehicles traversing a vertex-edge graph representing a surface traffic network on an airport surface. The Advisor performs pair-wise comparisons of current position and projected path of each vehicle with other surface vehicles to detect conflicts, determine critical sections, and provide hold advisories to traffic controllers recommending vehicles stop at entry points to protected zones around identified critical sections. A critical section defines a segment of the vertex-edge graph where vehicles are in crossing or merging or opposite direction gridlock contention. The Advisor detects critical sections without reference to scheduled, projected or required times along assigned vehicle paths, and generates hold advisories to prevent conflicts without requiring network path direction-of-movement rules and without requiring rerouting, rescheduling or other network optimization solutions.

  5. Academic Advisors' Learning Styles: Establishing a Baseline and Examining Implications

    ERIC Educational Resources Information Center

    Uhlik, Kim S.; Jones, Pamela E.

    2008-01-01

    The influence of students' learning styles has been increasingly recognized as an integral component of effective higher education; therefore, application of learning styles to academic advising is equally relevant. As academic advisors address student learning styles in the hope of promoting greater student success, the contribution of advisors'…

  6. Development of an Artificial Gravity Sleeper (AGS)

    NASA Technical Reports Server (NTRS)

    Cardus, David; Mctaggart, Wesley G.; Diamandis, Peter; Campbell, Scott

    1990-01-01

    The design and construction of a 2-meter radius 'human compatible' centrifuge termed the Artificial Gravity Sleeper (AGS) is considered. The centrifuge will accommodate up to four subjects at a time, operate at a broad range of speeds, and have safety features. Experiments that will be conducted on the AGS will help to investigate the quality of sleep during 100 percent gradient centrifugation. A microgravity simulation also will be studied using bed rest to assess the ability of 100 percent gradient centrifugation to function as a countermeasure to cardiovascular deconditioning.

  7. Hydroforming design and process advisor

    SciTech Connect

    Greer, J.T.; Ni, C.M.

    1996-10-10

    The hydroforming process involves hydraulically forming components by conforming them to the inner contours of a die. These contours can be complex and can often cause the material being formed to be stressed to rupture. Considerable process knowledge and materials modeling expertise is required to design hydroform dies and hydroformed parts that are readily formed without being overly stressed. For this CRADA, materials properties for steel tubes subjected to hydraulic stresses were collected; algorithms were developed which combined the materials properties data with process knowledge; and a user friendly graphical interface was utilized to make the system usable by a design engineer. A prototype hydroforming advisor was completed and delivered to GM. The technical objectives of the CRADA were met allowing for the development of an intelligent design systems, prediction of forming properties related to hydroforming, simulation and modeling of process execution, and design optimization. The design advisor allows a rapid and seamless approach to integration an otherwise enormous and onerous task of analysis and evaluation.

  8. 77 FR 67808 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-14

    ... President's Council of Advisors on Science and Technology (PCAST) AGENCY: Office of Science, Department of... summary agenda for a partially-closed meeting of the President's Council of Advisors on Science and... Advisors on Science and Technology (PCAST) is an advisory group of the Nation's leading scientists...

  9. 78 FR 12302 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-22

    ... President's Council of Advisors on Science and Technology (PCAST) AGENCY: Office of Science, Department of... summary agenda for a partially closed meeting of the President's Council of Advisors on Science and... President's Council of Advisors on Science and Technology (PCAST) is an advisory group of the...

  10. 77 FR 26273 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-03

    ... President's Council of Advisors on Science and Technology (PCAST) AGENCY: Department of Energy. ACTION... partially closed meeting of the President's Council of Advisors on Science and Technology (PCAST), and... INFORMATION: The President's Council of Advisors on Science and Technology (PCAST) is an advisory group of...

  11. 78 FR 2259 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-10

    ... President's Council of Advisors on Science and Technology (PCAST) AGENCY: Department of Energy. ACTION... teleconference call of the President's Council of Advisors on Science and Technology (PCAST), and describes the... of Advisors on Science and Technology (PCAST) is an advisory group of the nation's leading...

  12. 78 FR 35617 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-13

    ... President's Council of Advisors on Science and Technology (PCAST) AGENCY: Office of Science, Department of... summary agenda for a partially-closed meeting of the President's Council of Advisors on Science and... Council of Advisors on Science and Technology (PCAST) is an advisory group of the nation's...

  13. 77 FR 51790 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-27

    ... President's Council of Advisors on Science and Technology (PCAST) AGENCY: Department of Energy. ACTION... partially closed meeting of the President's Council of Advisors on Science and Technology (PCAST), and...: The President's Council of Advisors on Science and Technology (PCAST) is an advisory group of...

  14. 78 FR 50404 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-19

    ... President's Council of Advisors on Science and Technology (PCAST) AGENCY: Office of Science, Department of... summary agenda for a partially-closed meeting of the President's Council of Advisors on Science and... Council of Advisors on Science and Technology (PCAST) is an advisory group of the nation's...

  15. Dyadic Perspectives on Advisor-Advisee Relationships in Counseling Psychology Doctoral Programs

    ERIC Educational Resources Information Center

    Schlosser, Lewis Z.; Kahn, Jeffrey H.

    2007-01-01

    The authors present the results from a study investigating advisor-advisee relationships in counseling psychology doctoral training. Participants were 47 advisor-advisee dyads who were currently working together in an advising relationship. The results indicated that advisors and advisees exhibited significant agreement in their assessments of…

  16. First aid advisor

    SciTech Connect

    Saffer, S.I.; Weng, Wen-Chang

    1996-12-31

    A knowledge-based system (KBS), First Aid Advisor (FAA), is developed to provide a guidance for either a trained or untrained person to take some emergent actions to rescue the victim from life-threatening hazard or to prevent from causing serious problem before the Emergency Medical Service System (EMS) personnels arrive the scene. The First Aid Advisor will collect victim`s information by interacting with the user through a sequence of questions, analyze the victim`s problem, and give instructions step by step before offering a final advice. Since all the possible conditions are taken into consideration, it will guide the user to perform first aid from the most to the least urgent step for the victim. Furthermore, it will offer a suitable first aid advice for victim and eliminate the possibility of wrong actions done by trained person due to carelessness or nervousness. Offering advice to handle problems involving life-threatening conditions is the main objective of this system. In this paper, we will describe six major components of FAA and their respective tasks. Decision tables and dependency diagrams used in FAA implementation will also be described. System performance issues will conclude the paper.

  17. The nutrition advisor expert system

    NASA Technical Reports Server (NTRS)

    Huse, Scott M.; Shyne, Scott S.

    1991-01-01

    The Nutrition Advisor Expert System (NAES) is an expert system written in the C Language Integrated Production System (CLIPS). NAES provides expert knowledge and guidance into the complex world of nutrition management by capturing the knowledge of an expert and placing it at the user's fingertips. Specifically, NAES enables the user to: (1) obtain precise nutrition information for food items; (2) perform nutritional analysis of meal(s), flagging deficiencies based upon the U.S. Recommended Daily Allowances; (3) predict possible ailments based upon observed nutritional deficiency trends; (4) obtain a top ten listing of food items for a given nutrient; and (5) conveniently upgrade the data base. An explanation facility for the ailment prediction feature is also provided to document the reasoning process.

  18. The Traffic Management Advisor

    NASA Technical Reports Server (NTRS)

    Nedell, William; Erzberger, Heinz; Neuman, Frank

    1990-01-01

    The traffic management advisor (TMA) is comprised of algorithms, a graphical interface, and interactive tools for controlling the flow of air traffic into the terminal area. The primary algorithm incorporated in it is a real-time scheduler which generates efficient landing sequences and landing times for arrivals within about 200 n.m. from touchdown. A unique feature of the TMA is its graphical interface that allows the traffic manager to modify the computer-generated schedules for specific aircraft while allowing the automatic scheduler to continue generating schedules for all other aircraft. The graphical interface also provides convenient methods for monitoring the traffic flow and changing scheduling parameters during real-time operation.

  19. The Advisor Quality Survey: Good College Advisors Are Available, Knowledgeable, and Autonomy Supportive

    ERIC Educational Resources Information Center

    Sheldon, Kennon M.; Garton, Bryan; Orr, Rachael; Smith, Amy

    2015-01-01

    Most US institutions of higher education do not assess advisor quality. We report a scale development effort informed by the developmental prescriptions of self-determination theory (Deci & Ryan, 1985, 2000). The 15-item Missouri Advisor Quality Survey assesses advisor knowledge, advisor availability, and advisor autonomy supportiveness.…

  20. Outcome effectiveness of the lay health advisor model among Latinos in the United States: an examination by role

    PubMed Central

    Ayala, Guadalupe X.; Vaz, Lara; Earp, Jo Anne; Elder, John P.; Cherrington, Andrea

    2010-01-01

    The objective of this study was to examine lay health advisor (LHA) programs designed to promote health among US Latinos and the extent to which educator-only versus educator-plus-bridge programs differed in designs and outcomes achieved. Two independent coders reviewed 128 published articles on LHAs yielding information at two levels: (i) study design and participant and LHA characteristics from 61 studies that broadly compared educator-only versus educator-plus-bridge programs and (ii) implementation features and outcomes from 17 randomized controlled trials or quasi-experimental studies with outcome data. LHA programs have been widely used with Latinos in certain US regions; our findings indicate that LHAs are effective intervention agents. We identified differences between educator-only and educator-plus-bridge LHA programs, although the small number of educator-plus-bridge programs with outcome data limited comparisons. Major gaps remain in research targeting Latino subgroups other than Mexican immigrants/Mexican Americans. Sufficient research has evaluated LHA programs among Latinos on their ability to achieve health behavior and/or health status changes. In the future, more of a focus on organizational and policy changes is warranted. Questions remain about diversity in LHAs’ characteristics and roles, which influence not only outcomes but also program sustainability and dissemination. PMID:20603384

  1. Theoretical modeling of optical properties of Ag8 and Ag14 silver clusters embedded in an LTA sodalite zeolite cavity.

    PubMed

    Cuong, Ngo Tuan; Nguyen, Hue Minh Thi; Nguyen, Minh Tho

    2013-10-01

    Optical properties of silver Ag(n) nanoclusters are demonstrated to be dependent on their size, structure and charge state. It is found that when being contained in the sodalite cavity of LTA zeolite the tetradecanuclear hexacation silver cluster Ag14(6+) is stable. Its lower-lying states and optical spectrum are theoretically determined using the quantum chemical TD-DFT method. Its ground state possesses an outer-shell electron configuration of A1g(2)T2g(6) mimicking the s(2)p(6) valence of noble gas atoms. These frontier orbitals are constructed from 5s,5p(Ag)-AOs with contributions from framework oxygen atoms. Light absorption of Ag14(6+) embedded in the sodalite cage which is characterized by strong peaks centered at 331 and 476 nm (transitions 5s,p(Ag) → 5s,p(Ag)) leads to much longer wavelength emission. The sodalite cage, as a container, stabilizes the central Ag14(6+) cluster by electrostatic attraction. The absorption spectrum of the isovalent neutral Ag8 cluster embedded inside the same sodalite cavity is also simulated using TD-DFT and CASPT2 methods. This absorption spectrum which is similar to that of the Ag14(6+) cluster has two absorption bands in the near UV and visible regions. PMID:23936902

  2. 78 FR 30346 - Financial Investors Trust and Hanson McClain Strategic Advisors, Inc.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-22

    ... Conservative Fund, Pathway Advisors Growth & Income Fund, and Pathways Advisors Aggressive Growth Fund... relationship to an Unaffiliated Fund is covered by section 10(f) of the Act. 5. To further assure that...

  3. More than a Signature: How Advisor Choice and Advisor Behaviour Affect Doctoral Student Satisfaction

    ERIC Educational Resources Information Center

    Zhao, Chun-Mei; Golde, Chris M.; McCormick, Alexander C.

    2007-01-01

    A satisfactory relationship between doctoral students and their advisors is an essential component of successful doctoral training. Using responses to a national survey of doctoral students in the US from 27 universities and 11 disciplines, this paper explores factors affecting students' satisfaction with the advising relationship. We find that…

  4. Synthesis of Ag-coated polystyrene colloids by an improved surface seeding and shell growth technique

    SciTech Connect

    Tian Chungui; Wang Enbo . E-mail: wangenbo@public.cc.jl.cn; Kang Zhenhui; Mao Baodong; Zhang Chao; Lan Yang; Wang Chunlei; Song Yanli

    2006-11-15

    In this paper, an improved surface seeding and shell growth technique was developed to prepare Ag-polystyrene core shell composite. Polyethyleneimine (PEI) could act as the linker between Ag ions (Ag nanoparticles) and polystyrene (PS) colloids and the reducing agent in the formation of Ag nanoparticles. Due to the multi-functional characteristic of PEI, Ag seeds formed in-situ and were immobilized on the surface of PEI-modified PS colloids and no free Ag clusters coexist with the Ag 'seeding' PS colloids in the system. Then, the additional agents could be added into the resulting dispersions straightly to produce a thick Ag nanoshell. The Ag nanoshell with controllable thickness was formed on the surface of PS by the 'one-pot' surface seeding and shell growth method. The Ag-coverage increased gradually with the increasing of mass ratio of AgNO{sub 3}/PS. The optical properties of the Ag-PS colloids could be tailored by changing the coverage of Ag. - Graphical abstract: An improved surface seeding and shell growth technique was developed to prepare Ag-polystyrene core shell composite. The optical properties of the Ag-PS colloids could be tailored by changing the coverage of Ag. Display Omitted.

  5. Do health policy advisors know what the public wants? An empirical comparison of how health policy advisors assess public preferences regarding smoke-free air, and what the public actually prefers

    PubMed Central

    2013-01-01

    Background Health policy-making, a complex, multi-factorial process, requires balancing conflicting values. A salient issue is public support for policies; however, one reason for limited impact of public opinion may be misperceptions of policy makers regarding public opinion. For example, empirical research is scarce on perceptions of policy makers regarding public opinion on smoke-free public spaces. Methods Public desire for smoke-free air was compared with health policy advisor (HPA) perception of these desires. Two representative studies were conducted: one with the public (N = 505), and the other with a representative sample of members of Israel’s health-targeting initiative, Healthy Israel 2020 (N = 34), in December 2010. Corresponding questions regarding desire for smoke-free areas were asked. Possible smoke-free areas included: 100% smoke-free bars and pubs; entrances to health facilities; railway platforms; cars with children; college campuses; outdoor areas (e.g., pools and beaches); and common areas of multi-dweller apartment buildings. A 1–7 Likert scale was used for each measure, and responses were averaged into a single primary outcome, DESIRE. Our primary endpoint was the comparison between public preferences and HPA assessment of those preferences. In a secondary analysis, we compared personal preferences of the public with personal preferences of the HPAs for smoke-free air. Results HPAs underestimated public desire for smoke-free air (Public: Mean: 5.06, 95% CI:[4.94, 5.17]; HPA: Mean: 4.06, 95% CI:[3.61, 4.52]: p < .0001). Differences at the p = .05 level were found between HPA assessment and public preference for the following areas: 100% smoke-free bars and pubs; entrances to healthcare facilities; train platforms; cars carrying children; and common areas of multi-dweller apartment buildings. In our secondary comparison, HPAs more strongly preferred smoke-free areas than did the public (p < .0001). Conclusions Health policy advisors

  6. ADVISOR: a systems analysis tool for advanced vehicle modeling

    NASA Astrophysics Data System (ADS)

    Markel, T.; Brooker, A.; Hendricks, T.; Johnson, V.; Kelly, K.; Kramer, B.; O'Keefe, M.; Sprik, S.; Wipke, K.

    This paper provides an overview of Advanced Vehicle Simulator (ADVISOR)—the US Department of Energy's (DOE's) ADVISOR written in the MATLAB/Simulink environment and developed by the National Renewable Energy Laboratory. ADVISOR provides the vehicle engineering community with an easy-to-use, flexible, yet robust and supported analysis package for advanced vehicle modeling. It is primarily used to quantify the fuel economy, the performance, and the emissions of vehicles that use alternative technologies including fuel cells, batteries, electric motors, and internal combustion engines in hybrid (i.e. multiple power sources) configurations. It excels at quantifying the relative change that can be expected due to the implementation of technology compared to a baseline scenario. ADVISOR's capabilities and limitations are presented and the power source models that are included in ADVISOR are discussed. Finally, several applications of the tool are presented to highlight ADVISOR's functionality. The content of this paper is based on a presentation made at the 'Development of Advanced Battery Engineering Models' workshop held in Crystal City, Virginia in August 2001.

  7. Raman scattering enhanced within the plasmonic gap between an isolated Ag triangular nanoplate and Ag film.

    PubMed

    Li, Kuanguo; Jiang, Kang; Zhang, Lan; Wang, Yong; Mao, Lei; Zeng, Jie; Lu, Yonghua; Wang, Pei

    2016-04-22

    Enhanced electromagnetic field in the tiny gaps between metallic nanostructures holds great promise in optical applications. Herein, we report novel out-of-plane nanogaps composed of micrometer-sized Ag triangular nanoplates (AgTN) on Ag films. Notably, the new coupled plasmonic structure can dramatically enhance the surface-enhanced Raman scattering (SERS) by visible laser excitation, although the micrometer-sized AgTN has localized plasmon resonance at infrared wavelength. This enhancement is derived from the gap plasmon polariton between the AgTN and Ag film, which is excited via the antenna effect of the corner and edge of the AgTN. Systematic SERS studies indicated that the plasmon enhancement was on the order of corner > edge > face. These results were further verified by theoretical simulations. Our device paves the way for rational design of sensitive SERS substrates by judiciously choosing appropriate nanoparticles and optimizing the gap distance. PMID:26939539

  8. Raman scattering enhanced within the plasmonic gap between an isolated Ag triangular nanoplate and Ag film

    NASA Astrophysics Data System (ADS)

    Li, Kuanguo; Jiang, Kang; Zhang, Lan; Wang, Yong; Mao, Lei; Zeng, Jie; Lu, Yonghua; Wang, Pei

    2016-04-01

    Enhanced electromagnetic field in the tiny gaps between metallic nanostructures holds great promise in optical applications. Herein, we report novel out-of-plane nanogaps composed of micrometer-sized Ag triangular nanoplates (AgTN) on Ag films. Notably, the new coupled plasmonic structure can dramatically enhance the surface-enhanced Raman scattering (SERS) by visible laser excitation, although the micrometer-sized AgTN has localized plasmon resonance at infrared wavelength. This enhancement is derived from the gap plasmon polariton between the AgTN and Ag film, which is excited via the antenna effect of the corner and edge of the AgTN. Systematic SERS studies indicated that the plasmon enhancement was on the order of corner > edge > face. These results were further verified by theoretical simulations. Our device paves the way for rational design of sensitive SERS substrates by judiciously choosing appropriate nanoparticles and optimizing the gap distance.

  9. Spot and Runway Departure Advisor

    NASA Technical Reports Server (NTRS)

    Jung, Yoon Chul

    2013-01-01

    The Spot and Runway Departure Advisor (SARDA) is a research prototype of a decision support tool for ATC tower controllers to assist in manging and controlling traffic on the surface of an airport. SARDA employs a scheduler to generate an optimal runway schedule and gate push-back - spot release sequence and schedule that improves efficiency of surface operations. The advisories for ATC tower controllers are displayed on an Electronic Flight Strip (EFS) system. The human-in-the-loop simulation of the SARDA tool was conducted for east operations of Dallas-Ft. Worth International Airport (DFW) to evaluate performance of the SARDA tool and human factors, such as situational awareness and workload. The results indicates noticeable taxi delay reduction and fuel savings by using the SARDA tool. Reduction in controller workload were also observed throughout the scenario runs. The future plan includes modeling and simulation of the ramp operations of the Charlotte International Airport, and develop a decision support tool for the ramp controllers.

  10. An Ab Initio Study of the Low-Lying Doublet States of AgO and AgS

    NASA Technical Reports Server (NTRS)

    Bauschlicher, Charles W., Jr.; Partridge, Harry; Langhoff, Stephen R.

    1990-01-01

    Spectroscopic constants (D(sub o), r(sub e), mu(sub e), T(sub e)) are determined for the doublet states of AgO and AgS below approx. = 30000/cm. Large valence basis sets are employed in conjunction with relativistic effective core potentials (RECPs). Electron correlation is included using the modified coupled-pair functional (MCPF) and multireference configuration interaction (MRCI) methods. The A(sup 2)Sigma(sup +) - X(sup 2)Pi band system is found to occur in the near infrared (approx. = 9000/cm) and to be relatively weak with a radiative lifetime of 900 microns for A(sup 2)Sigma(sup +) (upsilon = 0). The weakly bound C(sup 2)Pi state (our notation), the upper state of the blue system, is found to require high levels of theoretical treatment to determine a quantitatively accurate potential. The red system is assigned as a transition from the C(sup 2)Pi state to the previously unobserved A(sup 2)Sigma(sup +) state. Several additional transitions are identified that should be detectable experimentally. A more limited study is performed for the vertical excitation spectrum of AgS. In addition, a detailed all-electron study of the X(sup 2)Pi and A(sup 2)Sigma(sup +) states of AgO is carried out using large atomic natural orbital (ANO) basis sets. Our best calculated D(sub o) value for AgO is significantly less than the experimental value, which suggests that there may be some systematic error in the experimental determination.

  11. Greek Advisors' Perceptions of Sorority Hazing.

    ERIC Educational Resources Information Center

    Shaw, Deborah Lee; Morgan, Thomas E.

    1990-01-01

    Examined Greek advisors' opinions on several issues related to sorority hazing. Results from 283 members of the Association of Fraternity Advisors revealed that, although almost all campuses had a hazing policy, over half of advisors felt that hazing still existed in some of their groups. Policies for handling hazing incidents were varied.…

  12. Switching of an Azobenzene-Tripod Molecule on Ag(111).

    PubMed

    Scheil, Katharina; Gopakumar, Thiruvancheril G; Bahrenburg, Julia; Temps, Friedrich; Maurer, Reinhard Johann; Reuter, Karsten; Berndt, Richard

    2016-06-01

    The trans-cis isomerization makes azobenzene (AB) a robust molecular switch. Once adsorbed to a metal, however, the switching is inefficient or absent due to rapid excited-state quenching or loss of the trans-cis bistability. We find that tris-[4-(phenylazo)-phenyl]-amine is a rather efficient switch on Ag(111). Using scanning tunneling and atomic force microscopy at submolecular resolution along with density functional theory calculations, we show that the switching process is no trans-cis isomerization but rather a reorientation of the N-N bond of an AB unit. It proceeds through a twisting motion of the azo-bridge that leads to a lateral shift of a phenyl ring. Thus, the role of the Ag substrate is ambivalent. While it suppresses the original bistability of the azobenzene units, it creates a new one by inducing a barrier for the rotation of the N-N bond. PMID:27193044

  13. How Is the Internship Going Anyways? An Action Research Approach to Understanding the Triad Relationship between Interns, Mentors, and Field Advisors

    ERIC Educational Resources Information Center

    Wong, Arch Chee Keen

    2011-01-01

    This article describes a research project that looks at the relationship between mentors, interns, and field advisors on a theological internship programme by way of the theory and practice relationship as it relates to the university and field context. The work of Hans Georg Gadamer is used as a framework for understanding the interviews using…

  14. Identification of the Discrepancies between Pharmacist and Patient Perception of the Pharmacist's Role as an Advisor on Drug Therapy Based on Social Science Theory.

    PubMed

    Oshima, Shinji; Senoo, Kazuhiko; Negishi, Akio; Akimoto, Hayato; Ohara, Kousuke; Inoue, Naoko; Ohshima, Shigeru; Kutsuma, Nobuaki; Juni, Kazuhiko; Kobayashi, Daisuke

    2016-01-01

    Article 25-2 of the Japanese Pharmacists' Act was revised in June 2014, establishing the position of pharmacists as "advisors on the use of pharmaceuticals." Prior to the Act's revision, we investigated the perceptions of patients and pharmacists about pharmacists' roles using a social science methodology. We also examined current opinions and necessary factors for the future growth and development of pharmacists. This questionnaire survey was conducted using an internet method. Patients and pharmacists answered 12 questions. Responses from 529 patients and 338 pharmacists were analyzed. For all items, pharmacists' awareness of their roles exceeded patients' awareness of the roles. In this study, the difference between pharmacist and patient awareness was larger than in similar research conducted in the United States. The greatest difference was observed in three items: "Understanding the effects of the drugs the patients are taking" (rate of high ratings: pharmacists 80.2%, patients 37.8%), "Understanding the health changes caused by the drugs dispensed to the patients" (pharmacists 80.2%, patients 28.4%), and "Consciously protecting patients from the adverse effects of drugs" (pharmacists 82.8%, patients 42.2%), indicating role discrepancy. Partition analysis indicated the three factors for a pharmacist to be regarded as a drug therapy or medication specialist: "The patient regards the pharmacist as his/her family or regular pharmacist," "The pharmacist is making it easy for a patient to talk with him/her" and "The pharmacist is aware of a patient's use of products other than prescribed drugs, such as over the counter (OTC) medications or health foods and nutritional supplements." Future efforts are necessary to resolve role discrepancy and implement ongoing monitoring. PMID:26700216

  15. Feature-Based Measuring Advisor, Version 2.1

    SciTech Connect

    Brown, Curtis

    2002-07-22

    The purpose of Feature-Based Measuring Advisor (FBMeas Advisor) is a graphical user interface enabling users to more effectively interact with a solid model for measuring applications. Specifically, the FBMeas Advisor provides a user interface to the functions and capabilities of the FBMeas component technology. The FBMeas Advisor allows end users to visualize, organize, and document their measuring process plans and to facilitate the generation of a coordinate measuring machine part programs before a workpiece is fabricated. The FBMeas Advisor permits the user to interact with an FBTol-enabled solid model to interactively and/or automatically create a set of measuring features (e.g., cylinders, planes, slots) that comply with national and international interface standards (i.e., DMIS (Dimensional Measuring Interface Standard, ISO 22063)). Measuring plans include defining measuring features interactively or automatically. Associating measuring features with appropriate tolerances and datum features via FBTol. Determining what measuring tasks (e.g., measure this feature to validate a size tolerance, measure this feature to establish a primary datum for a specific datum reference frame) are necessary to measure the feature. Assigning a measuring method to perform the task. For coordinate metrology measuring methods, measure points are determined interactively or automatically. Sensors and sensor configurations are defined, represented, and assigned to measuring methods. Measuring machines are defined, represented, and assigned to measure operations. Upon completion of a coordinate metrology measuring plan, FBMeas allows DMIS code segments to be generated, which can be used for DMIS-based CMM part programs.

  16. Assessment of the Student Peer Advisor Program: A Change in Roles.

    ERIC Educational Resources Information Center

    Phillips, Brad C.; Boren, Kelly J.

    Most academic advising conducted in the California Community Colleges is accomplished through a formal system administered by professional academic advisors/counselors. With recent cutbacks in funding, the amount of academic advisor time available to an increasing number of students is decreasing. In an effort to increase the availability of…

  17. 78 FR 15057 - The Advisors' Inner Circle Fund, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-08

    ... Capital Advisors, LLC (``PNC''), Frost Investment Advisors, LLC (``Frost''), GRT Capital Partners, L.L.C... series of AIC.\\4\\ Frost, a Delaware limited liability company and a wholly owned non- banking subsidiary of Frost Bank, is registered as an investment adviser under the Advisers Act and currently serves...

  18. The Role of Doctoral Advisors: A Look at Advising from the Advisor's Perspective

    ERIC Educational Resources Information Center

    Barnes, Benita J.; Austin, Ann E.

    2009-01-01

    The doctoral advisor is said to be one of the most important persons--if not "the" single most critical person--with whom doctoral students will develop a relationship during their doctoral degree programs (Baird 1995). However, we have limited knowledge regarding how doctoral advisors see their roles and responsibilities as advisors. Therefore,…

  19. Progress in the development of an artificial gravity simulator (AGS)

    NASA Technical Reports Server (NTRS)

    Cardus, David; Mctaggart, Wesley G.; Campbell, Scott

    1991-01-01

    The paper describes the short-arm centrifuge for studying the effects of acceleration on human subjects which was built at the Artificial Gravity Simulator (AGS) laboratory at Woodlands, Texas. The AGS centrifuge comprises a turntable, a traction system, a platform, four beds, and a data-communication system. Schematic diagrams are presented of the AGS laboratory layout, the centrifuge turntable, the tiltable (up to 6 deg) bed frame, and of the data collection multiplexer (master switch) for physiological data communications.

  20. Flight deck engine advisor

    NASA Technical Reports Server (NTRS)

    Shontz, W. D.; Records, R. M.; Antonelli, D. R.

    1992-01-01

    The focus of this project is on alerting pilots to impending events in such a way as to provide the additional time required for the crew to make critical decisions concerning non-normal operations. The project addresses pilots' need for support in diagnosis and trend monitoring of faults as they affect decisions that must be made within the context of the current flight. Monitoring and diagnostic modules developed under the NASA Faultfinder program were restructured and enhanced using input data from an engine model and real engine fault data. Fault scenarios were prepared to support knowledge base development activities on the MONITAUR and DRAPhyS modules of Faultfinder. An analysis of the information requirements for fault management was included in each scenario. A conceptual framework was developed for systematic evaluation of the impact of context variables on pilot action alternatives as a function of event/fault combinations.

  1. Simulation Test Of Descent Advisor

    NASA Technical Reports Server (NTRS)

    Davis, Thomas J.; Green, Steven M.

    1991-01-01

    Report describes piloted-simulation test of Descent Advisor (DA), subsystem of larger automation system being developed to assist human air-traffic controllers and pilots. Focuses on results of piloted simulation, in which airline crews executed controller-issued descent advisories along standard curved-path arrival routes. Crews able to achieve arrival-time precision of plus or minus 20 seconds at metering fix. Analysis of errors generated in turns resulted in further enhancements of algorithm to increase accuracies of its predicted trajectories. Evaluations by pilots indicate general support for DA concept and provide specific recommendations for improvement.

  2. Intelligent back pain advisor

    SciTech Connect

    Bills, M.; Suh, Sang C.

    1996-12-31

    There is a great need for expert systems in the medical field for expert system applications in the field of medical diagnosis. There aren`t any expert systems available for diagnosing back pain, and this tool can be useful. In this paper, we present an expert system that was designed primarily for the diagnosis and treatment of herniated disks, which can occur in any part of the spine. This paper discusses the implementation of the system and some future improvements to the interface that would make this expert system more intelligent.

  3. Faculty Advisors' Experiences with International Graduate Students

    ERIC Educational Resources Information Center

    Nguyen, Huynh Mai

    2013-01-01

    The current study explored the experiences of faculty advisors working with international graduate students (IGS). Data was collected through semi-structured interviews and a demographic survey and was analyzed using open, axial, and selective coding strategies. Three central categories emerged from the analysis: (a) advisors' perceptions of IGS,…

  4. Student and Advisor Attitudes toward Academic Advisement.

    ERIC Educational Resources Information Center

    Wood, Jane H.; Wood, Peter H.

    Three separate but similar questionnaires were mailed to faculty advisors, to secondary education majors, and to nonsecondary education majors in the College of Education and Allied Professions at Bowling Green State University. The majority of each group identified assistance with courses and scheduling at the advisors' most important function.…

  5. TEACHER-ADVISORS: Where There's a Skill There's A Way.

    ERIC Educational Resources Information Center

    Tamminen, Armas; And Others

    This report discusses a program to present the Teacher Advisement Training Model. This model for training teacher-advisors is based on the assumption that tentative commitment to making school a more rewarding experience for all is the first step in starting an effective program. The approach is to help teachers learn specific skills and methods…

  6. Risk Management in College Fraternities: Guidance from Two Faculty Advisors

    ERIC Educational Resources Information Center

    Rosenberg, Stuart; Mosca, Joseph

    2016-01-01

    Students who become members of fraternities and sororities avail themselves of significant opportunities that enrich their college life. Faculty advisors play an important role in assisting fraternities and sororities in shaping students' leadership, scholastic, and personal development. Given the risks such as alcohol use and hazing that continue…

  7. Advisor-Advisee Relationships in Graduate Training Programs

    ERIC Educational Resources Information Center

    Schlosser, Lewis Z.; Lyons, Heather Z.; Talleyrand, Regine M.; Kim, Bryan S. K.; Johnson, W. Brad

    2011-01-01

    Advisor-advisee relationships are an important aspect of the career development of professionals in many fields; however, limited scholarship has focused on these relationships. In the three articles of this special section, the authors attempt to help remedy this situation by articulating a culturally infused model of advising relationships in…

  8. Spot and Runway Departure Advisor (SARDA)

    NASA Technical Reports Server (NTRS)

    Jung, Yoon

    2016-01-01

    Spot and Runway Departure Advisor (SARDA) is a decision support tool to assist airline ramp controllers and ATC tower controllers to manage traffic on the airport surface to significantly improve efficiency and predictability in surface operations. The core function of the tool is the runway scheduler which generates an optimal solution for runway sequence and schedule of departure aircraft, which would minimize system delay and maximize runway throughput. The presentation also discusses the latest status of NASA's current surface research through a collaboration with an airline partner, where a tool is developed for airline ramp operators to assist departure pushback operations. The presentation describes the concept of the SARDA tool and results from human-in-the-loop simulations conducted in 2012 for Dallas-Ft. Worth International Airport and 2014 for Charlotte airport ramp tower.

  9. Feature-Based Measuring Advisor, Version 2.1

    2002-07-22

    The purpose of Feature-Based Measuring Advisor (FBMeas Advisor) is a graphical user interface enabling users to more effectively interact with a solid model for measuring applications. Specifically, the FBMeas Advisor provides a user interface to the functions and capabilities of the FBMeas component technology. The FBMeas Advisor allows end users to visualize, organize, and document their measuring process plans and to facilitate the generation of a coordinate measuring machine part programs before a workpiece ismore » fabricated. The FBMeas Advisor permits the user to interact with an FBTol-enabled solid model to interactively and/or automatically create a set of measuring features (e.g., cylinders, planes, slots) that comply with national and international interface standards (i.e., DMIS (Dimensional Measuring Interface Standard, ISO 22063)). Measuring plans include defining measuring features interactively or automatically. Associating measuring features with appropriate tolerances and datum features via FBTol. Determining what measuring tasks (e.g., measure this feature to validate a size tolerance, measure this feature to establish a primary datum for a specific datum reference frame) are necessary to measure the feature. Assigning a measuring method to perform the task. For coordinate metrology measuring methods, measure points are determined interactively or automatically. Sensors and sensor configurations are defined, represented, and assigned to measuring methods. Measuring machines are defined, represented, and assigned to measure operations. Upon completion of a coordinate metrology measuring plan, FBMeas allows DMIS code segments to be generated, which can be used for DMIS-based CMM part programs.« less

  10. Overcoming an intrinsic depolarizing resonance with a partial snake at the Brookhaven AGS.

    SciTech Connect

    Huang, H.; Ahrens, L.; Bai, M.; Brown, K. A.; Glenn, W.; Luccio, A. U.; MacKay, W. W.; Montag, C.; Ptitsyn, V.; Roser, T.; Tsoupas, N.; Zeno, K.; Ranjbar, V.; Cadman, R. V.; Spinka, H.; Underwood, D.; High Energy Physics; BNL; Indiana Univ.

    2004-06-01

    An 11.4% partial Siberian snake was used to successfully accelerate polarized protons through a strong intrinsic depolarizing spin resonance in the Alternating Gradient Synchrotron (AGS). No noticeable depolarization was observed. This opens up the possibility of using a 20% to 30% partial Siberian snake in the AGS or other medium energy proton synchrotrons to overcome all weak and strong depolarizing spin resonances.

  11. Sonosynthesis of an Ag/AgBr/Graphene-oxide nanocomposite as a solar photocatalyst for efficient degradation of methyl orange.

    PubMed

    Esmaeili, A; Entezari, M H

    2016-03-15

    In this study, a new method has developed for the synthesis of Ag/AgBr/Graphene-oxide (Ag/AgBr/GO) nanocomposite with high adsorption capacity and high photocatalytic activity in degradation of methyl orange (MO). In this method, ultrasound was applied in the synthesis and it was facilitated the process. The samples prepared under ultrasound were shown as Ag/AgBr/GO-U, and the samples under conventional method as Ag/AgBr/GO-C. The results of FT-IR, XRD, Raman, DRS and SEM confirmed the structure of the nanocomposites very well. Ultrasound played a key role in the formation of nanocomposite with smaller size of GO sheets and particles. Different amount of GO was used in the nanocomposite composition and their photocatalytic activities were compared. The MO in solution was completely degraded in 15 min, 30 min, and 45 min with Ag/AgBr/GO-U-1 that contained 1 mg mL(-1) GO, Ag/AgBr/GO-U-0.5 that contained 0.5 mg mL(-1) GO and Ag/AgBr/GO-C-0.5 that contained 0.5 mg mL(-1) GO, respectively. The chemical oxygen demand (COD) measurements displayed a complete mineralization in 30 min for Ag/AgBr/GO-U-0.5. The data obtained from the degradation experiments were fitted to the first-order kinetics and the adsorption obeyed the Langmuir model. The nanocatalyst did not exhibit significant loss of activity even after four cycles of successive uses. To determine the mechanism of photocatalytic degradation of MO, different scavengers were used. Based on the results, the superoxide radical, hydroxyl radical and hole had a key role in the degradation process. The Ag/AgBr/GO-U-1 nanocomposite exhibited the highest photocatalytic activity due to its high adsorption capacity and enhanced charge transfer. PMID:26724706

  12. High intensity proton acceleration at the Brookhaven AGS -- An update

    SciTech Connect

    Ahrens, L.; Alessi, J.; Blaskiewicz, M.

    1997-07-01

    The AGS accelerator complex is into its third year of 60+ {times} 10{sup 12} (teraproton = Tp) per cycle operation. The hardware making up the complex as configured in 1997 is briefly mentioned. The present level of accelerator performance is discussed. This includes beam transfer efficiencies at each step in the acceleration process, i.e. losses; which are a serious issue at this intensity level. Progress made in understanding beam behavior at the Linac-to-Booster (LtB) injection, at the Booster-to-AGS (BtA) transfer as well as across the 450 ms AGS accumulation porch is presented. The state of transition crossing, with the gamma-tr jump is described. Coherent effects including those driven by space charge are important at all of these steps.

  13. Descent Advisor Preliminary Field Test

    NASA Technical Reports Server (NTRS)

    Green, Steven M.; Vivona, Robert A.; Sanford, Beverly

    1995-01-01

    A field test of the Descent Advisor (DA) automation tool was conducted at the Denver Air Route Traffic Control Center in September 1994. DA is being developed to assist Center controllers in the efficient management and control of arrival traffic. DA generates advisories, based on trajectory predictions, to achieve accurate meter-fix arrival times in a fuel efficient manner while assisting the controller with the prediction and resolution of potential conflicts. The test objectives were: (1) to evaluate the accuracy of DA trajectory predictions for conventional and flight-management system equipped jet transports, (2) to identify significant sources of trajectory prediction error, and (3) to investigate procedural and training issues (both air and ground) associated with DA operations. Various commercial aircraft (97 flights total) and a Boeing 737-100 research aircraft participated in the test. Preliminary results from the primary test set of 24 commercial flights indicate a mean DA arrival time prediction error of 2.4 seconds late with a standard deviation of 13.1 seconds. This paper describes the field test and presents preliminary results for the commercial flights.

  14. Descent advisor preliminary field test

    NASA Technical Reports Server (NTRS)

    Green, Steven M.; Vivona, Robert A.; Sanford, Beverly

    1995-01-01

    A field test of the Descent Advisor (DA) automation tool was conducted at the Denver Air Route Traffic Control Center in September 1994. DA is being developed to assist Center controllers in the efficient management and control of arrival traffic. DA generates advisories, based on trajectory predictions, to achieve accurate meter-fix arrival times in a fuel efficient manner while assisting the controller with the prediction and resolution of potential conflicts. The test objectives were to evaluate the accuracy of DA trajectory predictions for conventional- and flight-management-system-equipped jet transports, to identify significant sources of trajectory prediction error, and to investigate procedural and training issues (both air and ground) associated with DA operations. Various commercial aircraft (97 flights total) and a Boeing 737-100 research aircraft participated in the test. Preliminary results from the primary test set of 24 commercial flights indicate a mean DA arrival time prediction error of 2.4 sec late with a standard deviation of 13.1 sec. This paper describes the field test and presents preliminary results for the commercial flights.

  15. The meteorological advisor in a nuclear generation station emergency plan

    SciTech Connect

    Caiazza, R.

    1985-01-01

    Niagara Mohawk Power Corporation (NMPC) has developed an extensive emergency response plan for the Nine Mile Point Nuclear Generating Station, located near Oswego, New York, in response to requirements of the Nuclear Regulatory Commission (NRC). If an emergency involving actual or potential release of radioactivity occurs, meteorological conditions in the vicinity of the plant are an extremely important factor in the emergency response. In recognition of this, NMPC has included a Meteorological Advisor position in its Technical Support Center (TSC)/Emergency Operations Facility (HOF) support staffing plans. The Meteorological Advisor is responsible for verification of meteorological measurements, interpretation and dissemination of weather forecasts, dose projection verification, and monitoring team direction. This paper describes those responsibilities as they are integrated into the emergency plan.

  16. 77 FR 66651 - Salient Advisors, L.P. and MarketShares ETF Trust; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-06

    ... COMMISSION Salient Advisors, L.P. and MarketShares ETF Trust; Notice of Application October 31, 2012 AGENCY... an exemption from sections 12(d)(1)(A) and (B) of the Act. Applicants: Salient Advisors, L.P... requests should be received by the Commission by 5:30 p.m. on November 26, 2012, and should be...

  17. "Maybe the Communication between Us Was Not Enough": Inside a Dysfunctional Advisor/L2 Advisee Relationship

    ERIC Educational Resources Information Center

    Krase, Ethan

    2007-01-01

    Reporting findings from a 5-month qualitative study of an ESL graduate student as she worked on her master's thesis with the assistance of her advisor, this study offers a detailed portrait of the complicated challenges ESL learners and their advisors may face as they attempt to negotiate working relationships with one another. The study examines…

  18. 77 FR 49839 - IndexIQ Advisors LLC and IndexIQ Active ETF Trust; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-17

    ... COMMISSION IndexIQ Advisors LLC and IndexIQ Active ETF Trust; Notice of Application August 13, 2012. AGENCY... an exemption from sections 12(d)(1)(A) and (B) of the Act. ] APPLICANTS: IndexIQ Advisors LLC (``IndexIQ'') and IndexIQ Active ETF Trust (the ``Trust''). SUMMARY OF APPLICATION: Applicants request...

  19. 3 CFR 13539 - Executive Order 13539 of April 21, 2010. President's Council of Advisors on Science and Technology

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Council of Advisors on Science and Technology 13539 Order 13539 Presidential Documents Executive Orders Executive Order 13539 of April 21, 2010 EO 13539 President's Council of Advisors on Science and Technology... America, and in order to establish an advisory council on science, technology, and innovation, it...

  20. An overview of Booster and AGS polarized proton operation during Run 15

    SciTech Connect

    Zeno, K.

    2015-10-20

    This note is an overview of the Booster and AGS for the 2015 Polarized Proton RHIC run from an operations perspective. There are some notable differences between this and previous runs. In particular, the polarized source intensity was expected to be, and was, higher this year than in previous RHIC runs. The hope was to make use of this higher input intensity by allowing the beam to be scraped down more in the Booster to provide a brighter and smaller beam for the AGS and RHIC. The RHIC intensity requirements were also higher this run than in previous runs, which caused additional challenges because the AGS polarization and emittance are normally intensity dependent.

  1. An intramolecular charge transfer fluorescent probe: Synthesis and selective fluorescent sensing of Ag +

    NASA Astrophysics Data System (ADS)

    Mu, Honglei; Gong, Rui; Ren, Lin; Zhong, Cheng; Sun, Yimin; Fu, Enqin

    2008-09-01

    An intramolecular charge transfer (ICT) fluorescent probe, in which the thiourea derivative moiety is linked to the fluorescent 4-(dimethylamino) benzamide, has been designed and synthesized. The ions-selective signaling behaviors of the probe were investigated. Upon the addition of Ag +, an overall emission enhancement of 14-fold was observed. Compound 1 displayed highly selective chelation enhanced fluorescence (CHEF) effect with Ag + over alkali, alkali earth metal ions and some transition metal ions in aqueous methanol solutions. The prominent selective and efficient fluorescent enhancing behavior could be utilized as a new chemosensing probe for the analysis of Ag + ion in aqueous environment.

  2. A piloted simulator evaluation of a ground-based 4D descent advisor algorithm

    NASA Technical Reports Server (NTRS)

    Green, Steven M.; Davis, Thomas J.; Erzberger, Heinz

    1987-01-01

    A ground-based, four-dimensional (4D) descent-advisor algorithm is under development at NASA Ames Research Center. The algorithm combines detailed aerodynamic, propulsive, and atmospheric models with an efficient numerical integration scheme to generate 4D descent advisories. This paper investigates the ability of the 4D descent advisor algorithm to provide adequate control of arrival time for aircraft not equipped with on-board 4D guidance systems. A piloted simulation was conducted to determine the precision with which the descent advisor could predict the 4D trajectories of typical straight-in descents flown by airline pilots under different wind conditions. The effects of errors in the estimation of wind and initial aircraft weight were also studied. A description of the descent advisor as well as the results of the simulation studies are presented.

  3. A piloted simulator evaluation of a ground-based 4-D descent advisor algorithm

    NASA Technical Reports Server (NTRS)

    Davis, Thomas J.; Green, Steven M.; Erzberger, Heinz

    1990-01-01

    A ground-based, four dimensional (4D) descent-advisor algorithm is under development at NASA-Ames. The algorithm combines detailed aerodynamic, propulsive, and atmospheric models with an efficient numerical integration scheme to generate 4D descent advisories. The ability is investigated of the 4D descent advisor algorithm to provide adequate control of arrival time for aircraft not equipped with on-board 4D guidance systems. A piloted simulation was conducted to determine the precision with which the descent advisor could predict the 4D trajectories of typical straight-in descents flown by airline pilots under different wind conditions. The effects of errors in the estimation of wind and initial aircraft weight were also studied. A description of the descent advisor as well as the result of the simulation studies are presented.

  4. What Are Faculty Advisors To Do When Their Own Career Path Does Not Satisfy Their Students?

    NASA Astrophysics Data System (ADS)

    McManus, D. A.

    2001-12-01

    As graduate students seek advice on broad career options, many faculty advisors do not know what to do. It is easy for them to do nothing. They may do nothing because they assume that their own students are interested only in an academic research career like theirs. The mistake here can be that the advisors' verbal and non-verbal communication deters students from mentioning their interests in the first place or pursuing those interests, if mentioned. Or advisors may do nothing by assuming that it is not their responsibility to advise students about career options other than being an academic researcher. The advisors' lack of knowledge about other careers may lead them to avoid the issue. The mistake here is obvious. So what are advisors to do? They can encourage students to think of their graduate study as part of their career preparation, not just a task to obtain a research degree. Creating a risk-free environment for career discussion will enable faculty advisors to learn each student's career priorities and validate exploration of broad career options. Advisors should not feel inadequate by being unable to advise about everything. No one expects them to. They can encourage their students to meet together, on their own if necessary, to discuss common career concerns, even to invite speakers, including alums, to talk about different careers and the preparation required. They can encourage their students to seek additional mentors, people more knowledgeable about careers of interest to the students. They can encourage students to take courses for career preparation, particularly courses outside of science, even though these courses "take them away from their research." And advisors should not hold students at fault if they change their minds about career paths. More information often changes minds. These are a few of the many things that advisors can do. It is essential that faculty advisors not resent students' decisions to follow a career path different from

  5. Design of a knowledge-based welding advisor

    SciTech Connect

    Kleban, S.D.

    1996-06-01

    Expert system implementation can take numerous forms ranging form traditional declarative rule-based systems with if-then syntax to imperative programming languages that capture expertise in procedural code. The artificial intelligence community generally thinks of expert systems as rules or rule-bases and an inference engine to process the knowledge. The welding advisor developed at Sandia National Laboratories and described in this paper deviates from this by codifying expertise using object representation and methods. Objects allow computer scientists to model the world as humans perceive it giving us a very natural way to encode expert knowledge. The design of the welding advisor, which generates and evaluates solutions, will be compared and contrasted to a traditional rule- based system.

  6. An overwhelmingly selective colorimetric sensor for Ag(+) using a simple modified polyacrylonitrile fiber.

    PubMed

    Xing, Xiaoli; Yang, Huixiao; Tao, Minli; Zhang, Wenqin

    2015-10-30

    A carboxymethyl-dithiocarbamate immobilized polyacrylonitrile fiber colorimetric sensor has been synthesized. This fiber sensor exhibits excellent selectivity and sensitivity for Ag(+) in aqueous solution with a remarkable color change from light pink to red-brown over a wide pH range of 2-12. The sensor responds selectively to Ag(+) in the presence of other ions, including Mg(2+), Al(3+), Ca(2+), Cr(3+), Mn(2+), Co(2+), Ni(2+), Cu(2+), Zn(2+), Cd(2+), Hg(2+) and Pb(2+). The colorimetric sensor has an extremely fast response time (10s) and a low visual limit of detection (5.53×10(-12) mol/L). The fiber sensor also undergoes an obvious color change in the presence of Ag(+) solutions containing EDTA, NaCl or NaBr. Density functional theory optimization reveals that the sensor and Ag(+) interact via a seven-membered ring complexation mechanism. PMID:25967097

  7. Stellated Ag-Pt bimetallic nanoparticles: An effective platform for catalytic activity tuning

    NASA Astrophysics Data System (ADS)

    Liu, Hui; Ye, Feng; Yao, Qiaofeng; Cao, Hongbin; Xie, Jianping; Lee, Jim Yang; Yang, Jun

    2014-02-01

    The usefulness of Pt-based nanomaterials for catalysis can be greatly enhanced by coupling morphology engineering to the strategic presence of a second or even third metal. Here we demonstrate the design and preparation of stellated Ag-Pt bimetallic nanoparticles where significant activity difference between the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR) may be realized by relegating Ag to the core or by hollowing out the core. In particular the stellated Pt surface, with an abundance of steps, edges, corner atoms, and {111} facets, is highly effective for the ORR but is ineffective for MOR. MOR activity is only observed in the presence of a Ag core through electronic coupling to the stellated Pt shell. The bimetallic Ag-Pt stellates therefore demonstrate the feasibility of tuning a Pt surface for two very different structure sensitive catalytic reactions. Stellated bimetallics may therefore be an effective platform for highly tunable catalyst designs.

  8. Stellated Ag-Pt bimetallic nanoparticles: An effective platform for catalytic activity tuning

    PubMed Central

    Liu, Hui; Ye, Feng; Yao, Qiaofeng; Cao, Hongbin; Xie, Jianping; Lee, Jim Yang; Yang, Jun

    2014-01-01

    The usefulness of Pt-based nanomaterials for catalysis can be greatly enhanced by coupling morphology engineering to the strategic presence of a second or even third metal. Here we demonstrate the design and preparation of stellated Ag-Pt bimetallic nanoparticles where significant activity difference between the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR) may be realized by relegating Ag to the core or by hollowing out the core. In particular the stellated Pt surface, with an abundance of steps, edges, corner atoms, and {111} facets, is highly effective for the ORR but is ineffective for MOR. MOR activity is only observed in the presence of a Ag core through electronic coupling to the stellated Pt shell. The bimetallic Ag-Pt stellates therefore demonstrate the feasibility of tuning a Pt surface for two very different structure sensitive catalytic reactions. Stellated bimetallics may therefore be an effective platform for highly tunable catalyst designs. PMID:24495979

  9. 1,10-Phenanthroline as an accelerator for Ag nanoparticle-catalysed electroless copper deposition

    NASA Astrophysics Data System (ADS)

    Liu, Chia-Ru; Chou, Nan-Kuang; Li, Cheng-Hsing; Chen, Ho-Rei; Lee, Chien-Liang

    2014-10-01

    1,10-Phenanthroline (phen) can be successfully used as an accelerator for Ag-catalysed electroless copper deposition (ECD) processes. Electrochemical quartz crystal microbalance analyses indicate that the mass activity in terms of thickness of deposited Cu layer and average ECD rate within a deposition time of 110 s for Ag nanoparticles activated by phen are 7.86 × 10-3 μm μg-1 and 1.43 × 10-4 μm μg-1 s-1, respectively, whereas Ag nanoparticles without phen cannot catalyse the reaction. Furthermore, Tafel and cyclic voltammetric results show that the addition of phen to the ECD bath significantly enhances the ability of the Ag nanoparticles to catalyse the oxidation of HCHO and suppresses the formation of CuO.

  10. Experience with the shift technical advisor position

    SciTech Connect

    Melber, B.D.; Olson, J.; Schreiber, R.E.; Winges, L.

    1984-03-01

    The provision of engineering expertise on shift at commercial nuclear power plants has mainly taken the form of the Shift Technical Advisor (STA). This person, acting in a capacity that is part engineer and part operator, is expected to advise the operations crew in the event of an emergency and review plant operating experience during normal circumstances. The position was mandated by the Nuclear Regulatory Commission following the incident at Three Mile Island. This report expands on a growing body of knowledge regarding the effectiveness of the STA. The new data presented here come from interviews with plant personnel and utility officials from nine sites. Researchers from the Pacific Northwest Laboratory (PNL) interviewed plant personnel, including the STA and immediate management, the shift supervisor and management, the training department, and ancillary staff, all of whom affect the intended performance of the STA. The conclusions of the report are that the design of the STA position results in limited contribution during emergencies; more comprehensive ways should be sought to provide the variety and specificity of engineering expertise needed during such times.

  11. 31 CFR 10.33 - Best practices for tax advisors.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 31 Money and Finance: Treasury 1 2012-07-01 2012-07-01 false Best practices for tax advisors. 10... Service § 10.33 Best practices for tax advisors. (a) Best practices. Tax advisors should provide clients with the highest quality representation concerning Federal tax issues by adhering to best practices...

  12. 31 CFR 10.33 - Best practices for tax advisors.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 31 Money and Finance: Treasury 1 2014-07-01 2014-07-01 false Best practices for tax advisors. 10... Service § 10.33 Best practices for tax advisors. (a) Best practices. Tax advisors should provide clients with the highest quality representation concerning Federal tax issues by adhering to best practices...

  13. 31 CFR 10.33 - Best practices for tax advisors.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 31 Money and Finance: Treasury 1 2011-07-01 2011-07-01 false Best practices for tax advisors. 10... Service § 10.33 Best practices for tax advisors. (a) Best practices. Tax advisors should provide clients with the highest quality representation concerning Federal tax issues by adhering to best practices...

  14. 31 CFR 10.33 - Best practices for tax advisors.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Best practices for tax advisors. 10... Service § 10.33 Best practices for tax advisors. (a) Best practices. Tax advisors should provide clients with the highest quality representation concerning Federal tax issues by adhering to best practices...

  15. 31 CFR 10.33 - Best practices for tax advisors.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 31 Money and Finance: Treasury 1 2013-07-01 2013-07-01 false Best practices for tax advisors. 10... Service § 10.33 Best practices for tax advisors. (a) Best practices. Tax advisors should provide clients with the highest quality representation concerning Federal tax issues by adhering to best practices...

  16. An asymmetric Zn//Ag doped polyaniline microparticle suspension flow battery with high discharge capacity

    NASA Astrophysics Data System (ADS)

    Wu, Sen; Zhao, Yongfu; Li, Degeng; Xia, Yang; Si, Shihui

    2015-02-01

    In this study, the effect of oxygen on the potential of reduced polyaniline (PANI) was investigated. In order to enhance the air oxidation of reduced PANI, several composites of PANI doped with co-catalysts were prepared, and a reasonable flow Zn//PANI suspension cell system was designed to investigate the discharge capacity of obtained PANI composite microparticle suspension cathodes. Compared with PANI doped with Cu2+, La+, Mn2+ and zinc protoporphyrin, Ag doped PANI composite at 0.90 weight percent doping of Ag gave the highest value of discharge capacity for the half-cell potential from the initial value to -0.20 V (vs. SCE). A comparison study on the electrochemical properties of both PANI and Ag doped PANI microparticle suspension was done by using cyclic voltammetry, AC Impedance. Due to partial utilization of Zn//air fuel cell, the discharge capacity for Ag doped PANI reached 470 mA h g-1 at the current density of 20 mA cm-2. At 15 mA cm-2, the discharge capacity even reached up to 1650 mA h g-1 after 220 h constant current discharge at the final discharge voltage of 0.65 V. This work demonstrates an effective and feasible approach toward obtaining high energy and power densities by a Zn//Ag-doped PANI suspension flow battery system combined with Zn//air fuel cell.

  17. Roles of religious and spiritual advisors among adults in Singapore with mental illnesses.

    PubMed

    Picco, Louisa; Subramaniam, Mythily; Abdin, Edimansyah; Vaingankar, Janhavi Ajit; Zhang, Yunjue; Chong, Siow Ann

    2013-11-01

    OBJECTIVE Information is limited concerning the role of religious and spiritual advisors in providing help to people with mental illnesses in Singapore. This study examined that role, as well as the satisfaction with and the perceived effectiveness of the services provided, among people with mental health problems. METHODS Data were collected as part of a nationally representative household survey of residents 18 years and older in Singapore. The Composite International Diagnostic Interview, version 3.0, was used to diagnose mental illness as well as to collect information about the mental health services respondents had sought. RESULTS A total of 6,616 respondents completed the survey; in the overall sample, 1.5% reported seeking help from religious or spiritual advisors. This rate increased to 6.6% among those with at least one mental illness, with the prevalence being higher among respondents with lifetime dysthymia, generalized anxiety disorder, or bipolar disorder. Sociodemographic correlates associated with a lower likelihood of consultation with a religious or spiritual advisor included reporting "other" race-ethnicity as well as faith in Buddhism, Hinduism, or Islam. Most respondents who sought help from a religious or spiritual advisor in the last 12 months were satisfied with the help they received, and about half reported it to be very useful. CONCLUSIONS Religious and spiritual advisors are an important source of help for people with mental illness, and a majority of respondents with a mental illness were satisfied with the support they received from these sources. PMID:23903293

  18. An ultrasensitive, uniform and large-area surface-enhanced Raman scattering substrate based on Ag or Ag/Au nanoparticles decorated Si nanocone arrays

    NASA Astrophysics Data System (ADS)

    Zhang, P. P.; Gao, J.; Sun, X. H.

    2015-01-01

    Large-area and highly ordered Si nanocone arrays decorated with Ag or Au/Ag nanoparticles have been fabricated via a mask-free lithography with reaction ion etching, followed by metal deposition process. Ultrasensitive surface enhanced Raman scattering signals with an enhancement factor of 1012 were achieved even at the concentration of the Rhodamine 6G as low as 10-15 M. The surface-enhanced Raman spectroscopy (SERS) substrate was also applied on the detection of Sudan I dye and the Raman signals were substantially enhanced as well. The stability of the SERS substrate can be significantly improved by covering Ag nanoparticles with Au thin layer, which maintain a high SERS performance even after one month storage. This nanofabrication process appears to be a feasible approach to prepare uniform and reproducible SERS-active substrates with high sensitivity and stability for practical SERS applications.

  19. Solar Effective Envelope Design Advisor (SEEDA)

    NASA Astrophysics Data System (ADS)

    Mahaek, Ekkachai

    The lack of effort by mainstream architects in integrating energy-efficient strategies in architectural designing is due to the complexity in a building's energy conscious concepts and theories, the difficulties to visualize and quantify energy consumption, and the late implementing of energy consumption analysis in the conventional design process. This task would be accomplishing by a building system's engineer where results might be determined only after the basic architectural design has been completed. An effective simple tool and method should then be available to assist architects in building's energy-efficient designing at the beginning of the design. The building's energy consumption is directly and mainly influenced by the relationship of the sun, site, and its building configuration. The solar radiations will first impact on the building's envelope, which will have a direct effect on the amount of energy a building will consume. If an architect can define or map the intensity of solar energy on the site's buildable volume, and use this information to determine the levels of solar insolation, a more energy efficient building form can be proposed. This research hypothesis has shared the fundamental techniques of the Solar Envelope projection by Professor Ralph Knowles [Knowles, 1981] of the University of Southern California. However a different approach is taken by including the influence of regional restrictions and the surrounding buildings' shadows when projecting of solar volumes and solar envelope. The research methodology will discuss the development of a computer-based approach to develop a three-dimensional architectural form based on an insolation map related to the design site. The prototype computer program is referred as the Solar Effective Envelope Design Advisor (SEEDA). The solar insolation volume of the site is determined by integrating three types of computer-generated models include the Buildable Volume model based on design constraints

  20. Electronic structure of crystalline phosphorus pentoxide and the effect of an Ag impurity

    NASA Astrophysics Data System (ADS)

    Abarenkov, I. V.; Tupitsyn, I. I.; Kuznetsov, V. G.; Payne, M. C.

    1999-09-01

    The phosphorus pentoxide crystal with Pnam symmetry containing four P2O5 molecules in the unit cell was calculated by ab initio density-functional theory in the local-density approximation with a plane-wave basis set using the CASTEP code. The calculated optimized geometry is in good agreement with experiment. The population analysis made in terms of Löwdin and Mulliken charges and Wiberg indexes showed that this crystal has a mixed chemical bonding, partly ionic, partly covalent. An Ag atom impurity in the phosphorus pentoxide crystal was investigated within the periodic model. The distortion of the lattice around the impurity was analyzed in terms of PO4 tetrahedra. The calculations showed that in spite of considerable deformation of the lattice, the Ag impurity does not break the P-O bonding network and changes the P-O bond order only a little. The Ag impurity atom is bound to the crystal with an almost pure ionic bond, the Ag atomic charge being 0.6 (Löwdin charge).

  1. Highly visible light active Ag@TiO2 nanocomposites synthesized using an electrochemically active biofilm: a novel biogenic approach

    NASA Astrophysics Data System (ADS)

    Khan, M. Mansoob; Ansari, Sajid A.; Amal, M. Ikhlasul; Lee, Jintae; Cho, Moo Hwan

    2013-05-01

    Titanium dioxide (TiO2) nanoparticles were decorated with different amounts of silver nanoparticles (AgNPs) using an electrochemically active biofilm (EAB), which is a biogenic approach that leads to the formation of Ag@TiO2 nanocomposites. UV-vis spectroscopy, photoluminescence, X-ray diffraction and electron microscopy showed AgNPs, 2-5 nm in size, well-dispersed and anchored to the TiO2 surface and overall synthesis of Ag@TiO2 nanocomposites. The photocatalytic performance of the as-synthesized Ag@TiO2 nanocomposites was evaluated in terms of their efficiency for the photodecomposition of methylene blue (MB) in an aqueous solution under visible light irradiation. The nanocomposites showed exceptionally high photodecomposition efficiency (>7 times) compared to commercial TiO2 (Sigma). The enhanced photocatalytic activity was attributed to the synergistic contribution of both a delayed charge recombination rate caused by the high electronic mobility of the AgNPs and the increased surface area originating from the nanometer sized AgNPs on TiO2. The nanocomposites also showed exceptionally high stability and reusability under similar experimental conditions.Titanium dioxide (TiO2) nanoparticles were decorated with different amounts of silver nanoparticles (AgNPs) using an electrochemically active biofilm (EAB), which is a biogenic approach that leads to the formation of Ag@TiO2 nanocomposites. UV-vis spectroscopy, photoluminescence, X-ray diffraction and electron microscopy showed AgNPs, 2-5 nm in size, well-dispersed and anchored to the TiO2 surface and overall synthesis of Ag@TiO2 nanocomposites. The photocatalytic performance of the as-synthesized Ag@TiO2 nanocomposites was evaluated in terms of their efficiency for the photodecomposition of methylene blue (MB) in an aqueous solution under visible light irradiation. The nanocomposites showed exceptionally high photodecomposition efficiency (>7 times) compared to commercial TiO2 (Sigma). The enhanced

  2. Empowering Hispanic Students through Student Organizations: Competencies for Faculty Advisors.

    ERIC Educational Resources Information Center

    Delgado-Romero, Edward A.; Hernandez, Carlos A.

    2002-01-01

    Presents preliminary competencies for faculty advisors of Hispanic student organizations; the competencies are presented, defined, and illustrated with examples. Concludes with implications for research. (EV)

  3. An unprecedented 3D POM-Ag architecture with intertwined and homological helical structures.

    PubMed

    Sha, Jing-Quan; Li, Meng-Ting; Sun, Jing-Wen; Zhang, Yu-Nan; Yan, Peng-Fei; Li, Guang-Ming

    2013-06-01

    A new hybrid compound, Na[Ag6(pyttz)2(H2O)][PMo12O40] (pyttz = 3-(pyrid-3-yl)-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl), has been hydrothermally synthesized and structurally characterized by routine techniques. X-ray diffraction analysis reveals that the title compound is constructed by the 2D Ag-pyttz coordination polymer and 3D Ag-POM architecture with helix. A fascinating structural feature is the assembling fashion of the right- and left-helical chain, namely, the helical chains with different orientations are intertwined with each other forming intertwined double helical layers along the c-axis, and the identical left- or right-handed helical chains are fused together in a hand-by-hand mode generating another homological helical layer along the a-axis. As a result, these helical layers intersect each other obtaining an unprecedented 3D POM-Ag inorganic architecture. Note that the 3D framework with a helix constructed by POMs and metal ions has never been observed up to date. Additionally, its photocatalytic degradation of RhB was also investigated. PMID:23558903

  4. Standards Advisor-Advanced Information Technology for Advanced Information Delivery

    NASA Technical Reports Server (NTRS)

    Hawker, J. Scott

    2003-01-01

    Developers of space systems must deal with an increasing amount of information in responding to extensive requirements and standards from numerous sources. Accessing these requirements and standards, understanding them, comparing them, negotiating them and responding to them is often an overwhelming task. There are resources to aid the space systems developer, such as lessons learned and best practices. Again, though, accessing, understanding, and using this information is often more difficult than helpful. This results in space systems that: 1. Do not meet all their requirements. 2. Do not incorporate prior engineering experience. 3. Cost more to develop. 4. Take longer to develop. The NASA Technical Standards Program (NTSP) web site at http://standards.nasa.gov has made significant improvements in making standards, lessons learned, and related material available to space systems developers agency-wide. The Standards Advisor was conceived to take the next steps beyond the current product, continuing to apply evolving information technology that continues to improve information delivery to space systems developers. This report describes the features of the Standards Advisor and suggests a technical approach to its development.

  5. 78 FR 11702 - AdvisorShares Investments, LLC and AdvisorShares Trust; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-19

    ... reasons discussed below. 6. Applicants assert that the shareholders expect the Advisor, subject to the... subadvisory agreements without shareholder approval and would grant relief from certain disclosure... ``Independent Trustees''), and by the initial shareholder of each Fund in the manner required by sections...

  6. The Advisor as Servant: The Theoretical and Philosophical Relevance of Servant Leadership to Academic Advising

    ERIC Educational Resources Information Center

    McClellan, Jeffrey L.

    2007-01-01

    Servant. This novel actively portrays Greenleaf's concept of servant leadership by describing the extracurricular work of a university professor. Consequently, some scholars have demonstrated the relevance of servant leadership to classroom instruction (Powers & Moore, 2005). However, it was not as an instructor, but as an advisor that the…

  7. 78 FR 11909 - Emerging Global Advisors, LLC, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-20

    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION Emerging Global Advisors, LLC, et al.; Notice of Application February 13, 2013. AGENCY: Securities and Exchange Commission (``Commission''). ACTION: Notice of an application for an order under section 6(c) of the Investment Company Act of...

  8. 78 FR 37605 - Sigma Investment Advisors, LLC, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-21

    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION Sigma Investment Advisors, LLC, et al.; Notice of Application June 14, 2013. AGENCY: Securities and Exchange Commission (``Commission''). ACTION: Notice of an application for an order under section 6(c) of the Investment Company Act of 1940...

  9. 77 FR 65593 - PNC Capital Advisors, LLC, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-29

    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION PNC Capital Advisors, LLC, et al.; Notice of Application October 23, 2012. AGENCY: Securities and Exchange Commission (``Commission''). ACTION: Notice of an application for an order under section 12(d)(1)(J) of the Investment Company Act...

  10. Perceptions and experiences of using automated bolus advisors amongst people with type 1 diabetes: A longitudinal qualitative investigation

    PubMed Central

    Lawton, J.; Kirkham, J.; Rankin, D.; Barnard, K.; Cooper, C.L.; Taylor, C.; Heller, S.; Elliott, J.

    2014-01-01

    Aims We explored people's reasons for, and experiences of, using bolus advisors to determine insulin doses; and, their likes/dislikes of this technology. Subjects and methods 42 people with type 1 diabetes who had received instruction in use of bolus advisors during a structured education course were interviewed post-course and 6 months later. Data were analysed thematically. Results Participants who considered themselves to have poor mathematical skills highlighted a gratitude for, and heavy reliance on, advisors. Others liked and chose to use advisors because they saved time and effort calculating doses and/or had a data storage facility. Follow-up interviews highlighted that, by virtue of no longer calculating their doses, participants could become deskilled and increasingly dependent on advisors. Some forgot what their mealtime ratios were; others reported a misperception that, because they were pre-programmed during courses, these parameters never needed changing. Use of data storage facilities could hinder effective review of blood glucose data and some participants reported an adverse impact on glycaemic control. Discussion While participants liked and perceived benefits to using advisors, there may be unintended consequences to giving people access to this technology. To promote effective use, on-going input and education from trained health professionals may be necessary. PMID:25451897

  11. An Ag-grid/graphene hybrid structure for large-scale, transparent, flexible heaters

    NASA Astrophysics Data System (ADS)

    Kang, Junmo; Jang, Yonghee; Kim, Youngsoo; Cho, Seung-Hyun; Suhr, Jonghwan; Hong, Byung Hee; Choi, Jae-Boong; Byun, Doyoung

    2015-04-01

    Recently, carbon materials such as carbon nanotubes and graphene have been proposed as alternatives to indium tin oxide (ITO) for fabricating transparent conducting materials. However, obtaining low sheet resistance and high transmittance of these carbon materials has been challenging due to the intrinsic properties of the materials. In this paper, we introduce highly transparent and flexible conductive films based on a hybrid structure of graphene and an Ag-grid. Electrohydrodynamic (EHD) jet printing was used to produce a micro-scale grid consisting of Ag lines less than 10 μm wide. We were able to directly write the Ag-grid on a large-area graphene/flexible substrate due to the high conductivity of graphene. The hybrid electrode could be fabricated using hot pressing transfer and EHD jet printing in a non-vacuum, maskless, and low-temperature environment. The hybrid electrode offers an effective and simple route for achieving a sheet resistance as low as ~4 Ω per square with ~78% optical transmittance. Finally, we demonstrate that transparent flexible heaters based on the hybrid conductive films could be used in a vehicle or a smart window system.Recently, carbon materials such as carbon nanotubes and graphene have been proposed as alternatives to indium tin oxide (ITO) for fabricating transparent conducting materials. However, obtaining low sheet resistance and high transmittance of these carbon materials has been challenging due to the intrinsic properties of the materials. In this paper, we introduce highly transparent and flexible conductive films based on a hybrid structure of graphene and an Ag-grid. Electrohydrodynamic (EHD) jet printing was used to produce a micro-scale grid consisting of Ag lines less than 10 μm wide. We were able to directly write the Ag-grid on a large-area graphene/flexible substrate due to the high conductivity of graphene. The hybrid electrode could be fabricated using hot pressing transfer and EHD jet printing in a non

  12. The Characteristics of an Antibacterial TiAgN Thin Film Coated by Physical Vapor Deposition Technique.

    PubMed

    Kang, Byeong-Mo; Jeong, Woon-Jo; Park, Gye-Choon; Yoon, Dong-Joo; Ahn, Ho-Geun; Lim, Yeong-Seog

    2015-08-01

    In this work, we found the characteristics of an antibacterial TiAgN thin film coated on the pure titanium specimen via the physical vapor deposition process (PVD). TiAgN thin films were coated using TiAg alloy targets by arc ion plating method. Changing the process parameters, the surface analysis of TiAgN thin film was observed by FE-SEM and the force of adhesion was measured with Scratch Tester. The proliferation of human gingival fibroblast (HGF) cells was examined by XTT test assay and the antibacterial properties were investigated by culturing Streptococus Mutans (KCTC 3065) using paper disk techniques. At the result of experiment, cytotoxic effects were not found and the antibacterial effects against Streptococus Mutans were appeared over 5 wt% TiAgN specimens. PMID:26369190

  13. Fabrication of an organic field effect transistor using nano imprinting of Ag inks and semiconducting polymers

    NASA Astrophysics Data System (ADS)

    Hu, PingAn; Li, Kun; Chen, Weilin; Peng, Li; Chu, Daping; O'Neill, William

    2010-07-01

    A simple and cheap procedure for flexible electronics fabrication was demonstrated by imprinting metallic nanoparticles (NPs) on flexible substrates. Silver NPs with an average diameter of 10 nm were prepared via an improved chemical approach and Ag Np ink was produced in α-terpineol with a concentration up to 15%. Silver micro/nanostructures with a dimension varying from nanometres to microns were produced on a flexible substrate (polyimide) by imprinting the as-prepared silver ink. The fine fluidic properties of an Ag NP/α-terpineol solution and low melting temperatures of silver nanoparticles render a low pressure and low temperature procedure, which is well suited for flexible electronics fabrication. The effects of sintering and mechanical bending on the conductivity of imprinted silver contacts were also investigated. Large area organic field effect transistors (OFET) on flexible substrates were fabricated using an imprinted silver electrode and semiconducting polymer. The OFET with silver electrodes imprinted from our prepared oleic acid stabilized Ag nanoparticle ink show an ideal ohmic contact; therefore, the OFET exhibit high performance (Ion/Ioff ratio: 1 × 103; mobility: 0.071 cm2 V-1 s-1).

  14. Five Possible Work Profiles for Full-Time Academic Advisors

    ERIC Educational Resources Information Center

    Steele, George

    2006-01-01

    Five potential work profiles for full-time academic advisors, based on the impact of technology, are proposed. The forces accelerating the impact of technology are identified, and the impact of emerging technologies on full-time advisor practice is discussed.

  15. 78 FR 27444 - Forum Investment Advisors, LLC, et al.;

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-10

    ... COMMISSION Forum Investment Advisors, LLC, et al.; Notice of Application May 6, 2013. AGENCY: Securities and... exemption from sections 12(d)(1)(A) and 12(d)(1)(B) of the Act. Applicants: Forum Investment Advisors, LLC (``FIA''), Forum ETF Trust (the ``Trust''), and Foreside Fund Services, LLC (collectively,...

  16. Microskills: Advisor Behaviors that Improve Communication with Advisees

    ERIC Educational Resources Information Center

    Barnett, Susan; Roach, Scott; Smith, Martha

    2006-01-01

    In writing this article, we wanted to provide advisors practical means with which to optimize their relationships with advisees. First, we describe behavioral micro-skills that can be used by advisors to enhance advising sessions. Attending behaviors (eye contact vocal cadence and tone, verbal tracking, body language) and listening skills (asking…

  17. Demographic Trends and Advocacy Experiences of Gay-Straight Alliance Advisors

    ERIC Educational Resources Information Center

    Graybill, Emily C.; Varjas, Kris; Meyers, Joel; Dever, Bridget V.; Greenberg, Daphne; Roach, Andrew T.; Morillas, Catalina

    2015-01-01

    Using an ecological model, the individual-, school-, and sociocultural-level characteristics that affect gay-straight alliance (GSA) advisors were examined in the current study. The formation of GSAs has been one way that schools have sought to improve the school climate for lesbian, gay, bisexual, and transgender (LGBT) youth. Limited information…

  18. Use of Appreciative Inquiry to Explore the Experiences of Faculty Advisors

    ERIC Educational Resources Information Center

    Myers, Valerie Ann-Marie

    2013-01-01

    Academic advising significantly impacts student achievement, persistence, and retention, yet it continues to be an area of weakness for many institutions. The purpose of this sequential mixed-methods case study was to explore the experiences of faculty advisors to identify strengths and weaknesses in their knowledge and skills. Appreciative…

  19. 75 FR 17912 - Sunshine Act; Notice of Virtual Public Forum for EAC Board of Advisors

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-08

    ... COMMISSION Sunshine Act; Notice of Virtual Public Forum for EAC Board of Advisors Date & Time: Monday, April... conduct business in an efficient manner in a public forum, including being able to review and comment on... take any votes or propose any resolutions during the 5-day forum of April 26-April 30, 2010....

  20. Modules and Information Retrieval Facilities of the Human Use Regulatory Affairs Advisor (HURAA)

    ERIC Educational Resources Information Center

    Graesser, Arthur C.; Person, Natalie K.; Jackson, G. Tanner; Toth, Jozsef A.

    2004-01-01

    The Human Use Regulatory Affairs Advisor (HURAA) is an Internet facility that provides help and training on the ethical use of human subjects in research, based on documents and regulations in United States Federal agencies. HURAA has a number of standard features of conventional web facilities and computer-based training, such as hypertext,…

  1. 77 FR 18798 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-28

    ...This notice sets forth the schedule and summary agenda for an open conference call of the President's Council of Advisors on Science and Technology (PCAST), and describes the functions of the Council. Notice of this meeting is required under the Federal Advisory Committee Act (FACA), Public Law 92-463; 86 Stat. 770. The purpose of this conference call is to discuss PCAST's Advanced......

  2. The spectroscopic constants and anharmonic force field of AgSH: An ab initio study.

    PubMed

    Zhao, Yanliang; Wang, Meishan; Yang, Chuanlu; Ma, Xiaoguang; Zhu, Ziliang

    2016-07-01

    The equilibrium structure, spectroscopy constants, and anharmonic force field of silver hydrosulfide (AgSH) have been calculated at B3P86, B3PW91 and MP2 methods employing two basis sets, TZP and QZP, respectively. The calculated geometries, ground state rotational constants, harmonic vibrational wave numbers, and quartic and sextic centrifugal distortion constants are compared with the available experimental and theoretical data. The equilibrium rotational constants, fundamental frequencies, anharmonic constants, and vibration-rotation interaction constants, Coriolis coupling constants, cubic and quartic force constants are predicted. The calculated results show that the MP2/TZP results are in good agreement with experiment observation and are also an advisable choice to study the anharmonic force field of AgSH. PMID:27085293

  3. The spectroscopic constants and anharmonic force field of AgSH: An ab initio study

    NASA Astrophysics Data System (ADS)

    Zhao, Yanliang; Wang, Meishan; Yang, Chuanlu; Ma, Xiaoguang; Zhu, Ziliang

    2016-07-01

    The equilibrium structure, spectroscopy constants, and anharmonic force field of silver hydrosulfide (AgSH) have been calculated at B3P86, B3PW91 and MP2 methods employing two basis sets, TZP and QZP, respectively. The calculated geometries, ground state rotational constants, harmonic vibrational wave numbers, and quartic and sextic centrifugal distortion constants are compared with the available experimental and theoretical data. The equilibrium rotational constants, fundamental frequencies, anharmonic constants, and vibration-rotation interaction constants, Coriolis coupling constants, cubic and quartic force constants are predicted. The calculated results show that the MP2/TZP results are in good agreement with experiment observation and are also an advisable choice to study the anharmonic force field of AgSH.

  4. An Ag-grid/graphene hybrid structure for large-scale, transparent, flexible heaters.

    PubMed

    Kang, Junmo; Jang, Yonghee; Kim, Youngsoo; Cho, Seung-Hyun; Suhr, Jonghwan; Hong, Byung Hee; Choi, Jae-Boong; Byun, Doyoung

    2015-04-21

    Recently, carbon materials such as carbon nanotubes and graphene have been proposed as alternatives to indium tin oxide (ITO) for fabricating transparent conducting materials. However, obtaining low sheet resistance and high transmittance of these carbon materials has been challenging due to the intrinsic properties of the materials. In this paper, we introduce highly transparent and flexible conductive films based on a hybrid structure of graphene and an Ag-grid. Electrohydrodynamic (EHD) jet printing was used to produce a micro-scale grid consisting of Ag lines less than 10 μm wide. We were able to directly write the Ag-grid on a large-area graphene/flexible substrate due to the high conductivity of graphene. The hybrid electrode could be fabricated using hot pressing transfer and EHD jet printing in a non-vacuum, maskless, and low-temperature environment. The hybrid electrode offers an effective and simple route for achieving a sheet resistance as low as ∼4 Ω per square with ∼78% optical transmittance. Finally, we demonstrate that transparent flexible heaters based on the hybrid conductive films could be used in a vehicle or a smart window system. PMID:25790123

  5. Immunotherapeutic role of Ag85B as an adjunct to antituberculous chemotherapy

    PubMed Central

    2011-01-01

    Background Immunotherapy to enhance the efficiency of the immune response in tuberculosis patients and to eliminate the persisters could be an additional valuable strategy to complement anti-mycobacterial chemotherapy. This study was designed to assess the immunotherapeutic potential of Ag85B as an adjunct to chemotherapy and its effect against active and persister bacteria left after therapy in mouse model of tuberculosis. Methods 6-8 week old female Balb/c mice were infected with Mycobacterium tuberculosis and treated with chemotherapy or immunotherapy. Protective efficacy was measured in terms of bacterial counts in lungs and spleen. Immune correlates of protection in terms of Th1 and Th2 cytokines were measured by ELISA. Results Therapeutic effect of Ag85B was found to be comparable to that of short term dosage of antituberculous drugs (ATDs). The therapeutic effect of ATDs was augmented by the simultaneous treatment with rAg85B and moreover therapy with this protein allowed us to reduce ATD dosage. This therapy was found to be effective even in case of drug persisters. The levels of antigen specific IFNγ and IL-12 were significantly increased after immunotherapy as compared to the basal levels; moreover antigen specific IL-4 levels were depressed on immunotherapy with Ag85B. Conclusion We demonstrated in this study that the new combination approach using immunotherapy and concurrent chemotherapy should offer several improvements over the existing regimens to treat tuberculosis. The therapeutic effect is associated not only with initiating a Th1 response but also with switching the insufficient Th2 immune status to the more protective Th1 response. PMID:21703025

  6. Advisees' Expectations for Support as Moderator between Advisor Behavior and Advisee Perceptions of Advisor Behavior

    ERIC Educational Resources Information Center

    Fullick, Julia M.; Smith-Jentsch, Kimberly A.

    2013-01-01

    We tested relationships between students' expectations of psychosocial and career support through a peer advising program, the frequency of advisor behaviors consistent with these types of support (coded from transcripts), and advisee perceptions after receiving such support. Participants were 179 advisor-advisee dyads at a large southeastern…

  7. Are We in This Together? Partnerships between Academic Advisors and Advising Administrators and Their Relation to Advisor Job Satisfaction

    ERIC Educational Resources Information Center

    Chabinak, Sarah Elizabeth

    2010-01-01

    Scope and Method of Study: This study examined the relationship between professional academic advisors' job satisfaction and perceptions of respect by administration, involvement in decision making, and autonomy. 290 professional academic advisors from 41 public FT4/MS/HTI Carnegie classified institutions participated in the quantitative study…

  8. An Electroless-Ag Reflector Developed for High-Brightness White LEDs

    NASA Astrophysics Data System (ADS)

    Liu, W. C.; Chung, T. Y.; Chen, Y. H.; Hsiao, C. Y.; Lin, C. P.; Liu, C. Y.

    2014-12-01

    This study was conducted to investigate the reflectivity and the reflectivity stability of the electroless (Ag) metallization of reflectors used in high-brightness white GaN light-emitting diode packages. Two main reflector metallization schemes were studied: (1) electroless-Ag/electroless-pure-Pd/electroless-Ni plating and (2) electroless-Ag/electroless-Pd(P)/electroless-Ni plating. The reflectivity achieved using all reflector-metallization schemes was >85% in the visible range. However, in the electroless-Ag/electroless-pure-Pd/electroless-Ni reflector, reflectivity exhibited substantial thermal degradation; this was because of two principal factors: (1) the change in the surface morphology of the electroless-Ag surface grains; and (2) the alloying effect on the Ag layer exerted by the interdiffusion occurring with the underlying Pd layer. In this study, P was added to the Pd layer, and the thermal degradation of the annealed electroless-Ag/electroless-Pd(P)/electroless-Ni reflector was measured to be less than that of the electroless-Ag/electroless-pure-Pd/electroless-Ni reflector. The P content retarded the interdiffusion between the Ag and Pd(P) layers and preserved the faceted surface of the electroless-Ag layer, which enhanced the stability of the reflectivity of the electroless-Ag reflector. Furthermore, increasing the thickness of the electroless-Ag layer reduced the amount of Pd diffusing through the Ag layer, which helped retain the reflectivity of the Ag surface.

  9. An analytical electron microscopic investigation of precipitation in an Al-Cu-Zn-Mg-Ag alloy.

    PubMed

    Hasan, F; Lorimer, G W

    1993-03-01

    The distribution, morphology, chemistry, and crystallography of the precipitates formed during aging of an Al-Cu-Zn-Mg-Ag alloy have been studied using analytical transmission electron microscopy. The first precipitates to appear during aging at 150 degrees C were thin hexagonal-shaped plate-like precipitates which formed on the (111)Al planes. These precipitates had a face-centred orthorhombic crystal structure and their composition was essentially CuAl2 although they contained a trace of silver. At peak hardness the microstructure consisted of the plate-like precipitates on (111)Al planes and theta' precipitates on (100)Al planes. Overaging resulted in the precipitation of equilibrium theta, CuAl2, which exhibited a lath morphology and an orientation-relationship with the matrix (210)Al magnitude of (110)gamma; (001)Al misoriented from (001)gamma by approximately 6 degrees. Prolonged overaging at 250 degrees C resulted in the formation of cuboid-shaped Al5(Cu,Zn)6Mg2 precipitates which had a cubic crystal structure and a cube:cube orientation-relationship with the matrix. PMID:8513176

  10. The γ-polymorph of AgZnPO4 with an ABW zeolite-type framework topology

    PubMed Central

    Assani, Abderrazzak; Saadi, Mohamed; El Ammari, Lahcen

    2010-01-01

    The γ-polymorph of the title compound, silver zinc orthophos­phate, was synthesized under hydro­thermal conditions. The structure consists of ZnO4, PO4 and AgO4 units. The coord­ination spheres of ZnII and PV are tetra­hedral, whereas the AgI atom is considerably distorted from a tetra­hedral coordination. Each O atom is linked to each of the three cations. An elliptic eight-membered ring system is formed by corner-sharing of alternating PO4 and ZnO4 tetra­hedra, leading to a framework with an ABW-type zeolite structure. The framework encloses channels running parallel to [100] in which the Ag cations are located, with Ag⋯Ag contacts of 3.099 (3) Å. This short distance results from d 10⋯d 10 inter­actions, which play a substantial role in the crystal packing. The structure of γ-AgZnPO4 is distinct from the two other polymorphs α-AgZnPO4 and β-AgZnPO4, but is isotypic with NaZnPO4-ABW, NaCoPO4-ABW and NH4CoPO4-ABW. PMID:21588789

  11. Synthesis and photocatalytic performance of an efficient Ag@AgBr/K{sub 2}Ti{sub 4}O{sub 9} composite photocatalyst under visible light

    SciTech Connect

    Liang, Yinghua; Lin, Shuanglong; Liu, Li; Hu, Jinshan; Cui, Wenquan

    2014-08-15

    Highlights: • The plasmatic Ag@AgBr sensitized K{sub 2}Ti{sub 4}O{sub 9} composite photocatalysts. • Ag@AgBr greatly increased visible light absorption for K{sub 2}Ti{sub 4}O{sub 9}. • The plamonic photocatalysts exhibited enhanced activity for the degradation of RhB. - Abstract: Ag@AgBr nanoparticle-sensitized K{sub 2}Ti{sub 4}O{sub 9} composite photocatalysts (Ag@AgBr/K{sub 2}Ti{sub 4}O{sub 9}) were prepared by a facile precipitation–photoreduction method. The photocatalytic activities of the Ag@AgBr/K{sub 2}Ti{sub 4}O{sub 9} nanocomposites were evaluated for photocatalytic degradation of (RhB) under visible light irradiation. The composites exhibited excellent visible light absorption, which was attributable to the surface plasmon effect of Ag nanoparticles. The Ag@AgBr was uniformly scattered on the surface of K{sub 2}Ti{sub 4}O{sub 9} and possessed sizes in the range of 20–50 nm. The loading amount of Ag@AgBr was also studied, and was found to influence the absorption spectra of the resulting composites. Approximately 95.9% of RhB was degraded by Ag@AgBr (20 wt.%)/K{sub 2}Ti{sub 4}O{sub 9} after irradiation for 1 h. The stability of the material was also investigated by performing consecutive runs. Additionally, studies performed using radical scavengers indicated that ·O{sub 2}{sup −} and Br{sup 0} acted as the main reactive species. Based on the experimental results, a photocatalytic mechanism for organics degradation over Ag@AgBr/K{sub 2}Ti{sub 4}O{sub 9} photocatalysts was proposed.

  12. Science Advisor and Applied Physicist: Joseph Henry Serves His Country

    NASA Astrophysics Data System (ADS)

    Rothenberg, Marc

    1997-04-01

    When Joseph Henry accepted the postion of secretary of the Smithsonian in 1846, his career changed radically. Although he never ceased thinking of himself as a research scientist and educator, thereafter his chief roles were those of science administrator and advisor to both the executive and legislative branches of the federal government for both science and technology. His effectiveness as an advocate became more important than his skill as an experimental physicist. Even when he entered the laboratory, his role had changed. No longer was he concerned with basic research. As a member of various government boards and committees, Henry spent the last three decades of his life concerned with the application of fundamental knowledge for the improvement of the human condition. This paper will discuss Henry's service on behalf of his country.

  13. Unusual N-H activation of 2-aminopyrimidine: supramolecular assembly into an Ag(I) metal-organic framework.

    PubMed

    Liu, Fu-Ling; Xu, Zheng-Hu; Zhang, Xi-Ying; Wang, Xing-Po; Sun, Di

    2014-02-01

    A rare example of coordination at the amino group of NH2 pym (2-aminopyrimidine) relevant to N-H activation is described that leads to a novel Ag(I) -imide 3D metal-organic framework (MOF). The coordination of Ag(I) to NH2 pym produced an electron-withdrawing effect and thus increased its acidity, which facilitated the N-H activation and the subsequent formation of the Ag-imide bond. A cooperative metalation/deprotonation process for the N-H activation of NH2 pym is suggested. Interestingly, photoluminescence of 1 is switched on at the low temperature of 77 K. PMID:24227790

  14. Nanostructured AgBr loaded TiO2: An efficient sunlight active photocatalyst for degradation of Reactive Red 120.

    PubMed

    Velmurugan, Rengasamy; Sreedhar, Bojja; Swaminathan, Meenakshisundaram

    2011-01-01

    The AgBr loaded TiO2 catalyst was prepared by a feasible approach with AgBr and tetraisopropyl orthotitanate and characterized by BET surface area measurement, diffuse reflectance spectra (DRS), scanning electron microscope (SEM), energy dispersive spectra (EDS), X-ray diffraction (XRD), transmission electron microscope (TEM) and atomic force microscope (AFM) analysis. The results of characterization reveal that AgBr loaded TiO2 has a nanostructure. Formation of the nanostructure in AgBr loaded TiO2 results in substantial shifting of the absorption edge of TiO2 to red and enhancement of visible light absorption. Electrochemical impedance spectroscopy measurements reveal that AgBr loaded TiO2 has a higher photoconductivity than prepared TiO2 due to higher separation efficiency of electron-hole pairs. Cyclic voltammetric studies reveal enhanced conductivity in AgBr loaded TiO2, which causes an increase in its photocatalytic activity. AgBr loaded TiO2 exhibited a higher photocatalytic activity than TiO2-P25 and prepared TiO2 in the photodegradation of Reactive Red 120 (RR 120). PMID:21801445

  15. Nanostructured AgBr loaded TiO2: An efficient sunlight active photocatalyst for degradation of Reactive Red 120

    PubMed Central

    2011-01-01

    The AgBr loaded TiO2 catalyst was prepared by a feasible approach with AgBr and tetraisopropyl orthotitanate and characterized by BET surface area measurement, diffuse reflectance spectra (DRS), scanning electron microscope (SEM), energy dispersive spectra (EDS), X-ray diffraction (XRD), transmission electron microscope (TEM) and atomic force microscope (AFM) analysis. The results of characterization reveal that AgBr loaded TiO2 has a nanostructure. Formation of the nanostructure in AgBr loaded TiO2 results in substantial shifting of the absorption edge of TiO2 to red and enhancement of visible light absorption. Electrochemical impedance spectroscopy measurements reveal that AgBr loaded TiO2 has a higher photoconductivity than prepared TiO2 due to higher separation efficiency of electron-hole pairs. Cyclic voltammetric studies reveal enhanced conductivity in AgBr loaded TiO2, which causes an increase in its photocatalytic activity. AgBr loaded TiO2 exhibited a higher photocatalytic activity than TiO2-P25 and prepared TiO2 in the photodegradation of Reactive Red 120 (RR 120). PMID:21801445

  16. Student goal orientation in learning inquiry skills with modifiable software advisors

    NASA Astrophysics Data System (ADS)

    Shimoda, Todd Adrian

    A computer support environment (SCI-WISE) for learning and doing inquiry was designed. The system incorporates software advisors that give task completion advice (eg., forming hypotheses), general purpose advice (e.g., brainstorming), or system modification advice. Advisors' knowledge includes concepts, strategies, examples, referrals to other advisors, and criteria for evaluating good products and skills. Students using SCI-WISE can select the advisors' advice type (specific, general, or hints), and when advisors give advice (anytime, alert, or ask). Students can also modify the advisors' knowledge. The system is designed partly on a theoretical framework that assumes giving students higher levels of agency will facilitate higher-level goal orientation (such as knowledge-building) and produce higher levels of competence. In two studies of sixth graders, science students took a pretest of an open-ended inquiry question and a questionnaire that measured their goal orientations. The students worked in pairs on an inquiry project about memory, using one of two versions of SCI-WISE, one modifiable and one not modifiable. After finishing the project, the students took a posttest similar to the pretest, and evaluated the system. The main hypotheses predicted that knowledge-oriented students using the modifiable version would rate the system higher, use it more effectively, and do better on the inquiry posttest than task-oriented students. The results supported many of the hypotheses generated from the theoretical framework. Knowledge-oriented students tended to rate SCI-WISE higher, use more general purpose and system development advisors, and select more general advice and hints than task-oriented students. On the posttest inquiry test, students with higher goal orientations scored higher on average, particularly when paired with another knowledge oriented student. The studies also showed that goal orientation was not correlated with grade point average. Finally, the

  17. A study on optimization of hybrid drive train using Advanced Vehicle Simulator (ADVISOR)

    NASA Astrophysics Data System (ADS)

    Same, Adam; Stipe, Alex; Grossman, David; Park, Jae Wan

    This study investigates the advantages and disadvantages of three hybrid drive train configurations: series, parallel, and "through-the-ground" parallel. Power flow simulations are conducted with the MATLAB/Simulink-based software ADVISOR. These simulations are then applied in an application for the UC Davis SAE Formula Hybrid vehicle. ADVISOR performs simulation calculations for vehicle position using a combined backward/forward method. These simulations are used to study how efficiency and agility are affected by the motor, fuel converter, and hybrid configuration. Three different vehicle models are developed to optimize the drive train of a vehicle for three stages of the SAE Formula Hybrid competition: autocross, endurance, and acceleration. Input cycles are created based on rough estimates of track geometry. The output from these ADVISOR simulations is a series of plots of velocity profile and energy storage State of Charge that provide a good estimate of how the Formula Hybrid vehicle will perform on the given course. The most noticeable discrepancy between the input cycle and the actual velocity profile of the vehicle occurs during deceleration. A weighted ranking system is developed to organize the simulation results and to determine the best drive train configuration for the Formula Hybrid vehicle. Results show that the through-the-ground parallel configuration with front-mounted motors achieves an optimal balance of efficiency, simplicity, and cost. ADVISOR is proven to be a useful tool for vehicle power train design for the SAE Formula Hybrid competition. This vehicle model based on ADVISOR simulation is applicable to various studies concerning performance and efficiency of hybrid drive trains.

  18. AGS II

    SciTech Connect

    Palmer, R.B.

    1984-01-01

    Interest in rare K decays, neutrino oscillations and other fields have generated an increasing demand for running, and improved intensity and duty cycle, at the AGS. Current projects include acceleration of polarized protons and light ions (up to mass 32). Future plans are for a booster to increase intensity and allow heavy ions (up to mass 200), and a stretcher to give 100% duty cycle. A later upgrade could yield an average current of 32 ..mu.. amps. 6 figures, 2 tables.

  19. Comparison of Photovoltaic Models in the System Advisor Model: Preprint

    SciTech Connect

    Blair, N. J.; Dobos, A. P.; Gilman, P.

    2013-08-01

    The System Advisor Model (SAM) is free software developed by the National Renewable Energy Laboratory (NREL) for predicting the performance of renewable energy systems and analyzing the financial feasibility of residential, commercial, and utility-scale grid-connected projects. SAM offers several options for predicting the performance of photovoltaic (PV) systems. The model requires that the analyst choose from three PV system models, and depending on that choice, possibly choose from three module and two inverter component models. To obtain meaningful results from SAM, the analyst must be aware of the differences between the model options and their applicability to different modeling scenarios. This paper presents an overview the different PV model options and presents a comparison of results for a 200-kW system using different model options.

  20. Multi-Center Traffic Management Advisor Operational Field Test Results

    NASA Technical Reports Server (NTRS)

    Farley, Todd; Landry, Steven J.; Hoang, Ty; Nickelson, Monicarol; Levin, Kerry M.; Rowe, Dennis W.

    2005-01-01

    The Multi-Center Traffic Management Advisor (McTMA) is a research prototype system which seeks to bring time-based metering into the mainstream of air traffic control (ATC) operations. Time-based metering is an efficient alternative to traditional air traffic management techniques such as distance-based spacing (miles-in-trail spacing) and managed arrival reservoirs (airborne holding). While time-based metering has demonstrated significant benefit in terms of arrival throughput and arrival delay, its use to date has been limited to arrival operations at just nine airports nationally. Wide-scale adoption of time-based metering has been hampered, in part, by the limited scalability of metering automation. In order to realize the full spectrum of efficiency benefits possible with time-based metering, a much more modular, scalable time-based metering capability is required. With its distributed metering architecture, multi-center TMA offers such a capability.

  1. Preparation of an agar-silver nanoparticles (A-AgNp) film for increasing the shelf-life of fruits.

    PubMed

    Gudadhe, Janhavi A; Yadav, Alka; Gade, Aniket; Marcato, Priscyla D; Durán, Nelson; Rai, Mahendra

    2014-12-01

    Preparation of protective coating possessing antimicrobial properties is present day need as they increase the shelf life of fruits and vegetables. In the present study, preparation of agar-silver nanoparticle film for increasing the shelf life of fruits is reported. Silver nanoparticles (Ag-NPs) biosynthesised using an extract of Ocimum sanctum leaves, were mixed with agar-agar to prepare an agar-silver nanoparticles (A-AgNp) film. This film was surface-coated over the fruits, Citrus aurantifolium (Thornless lime) and Pyrus malus (Apple), and evaluated for the determination of antimicrobial activity of A-AgNp films using disc diffusion method, weight loss and shelf life of fruits. This study demonstrates that these A-AgNp films possess antimicrobial activity and also increase the shelf life of fruits. PMID:25429496

  2. Ag K- and L3-edge XAFS study on Ag species in Ag/Ga2O3 photocatalysts

    NASA Astrophysics Data System (ADS)

    Yamamoto, M.; Yoshida, T.; Yamamoto, N.; Nomoto, T.; Yamamoto, A.; Yoshida, H.; Yagi, S.

    2016-05-01

    Ag loaded Ga2O3 (Ag/Ga2O3) shows photocatalytic activity for reduction of CO2 with water. Ag L3-edge XANES and K-edge EXAFS spectra were measured for various Ag/Ga2O3 samples, which suggested that structural and chemical states of Ag species varied with the loading amount of Ag and the preparation method. The Ag species were metallic Ag particles with an AgGaO2-like interface structure in the sample with high loading amount of Ag while predominantly Ag metal clusters in the sample with low loading amount of Ag. The XANES feature just above the edge represented the interaction between the Ag species and the Ga2O3 surface, showing that the Ag metal clusters had more electrons in the d-orbitals by interacting with the Ga2O3 surface, which would contribute the high photocatalytic activity.

  3. Ag out-surface diffusion in crystalline SiC with an effective SiO2 diffusion barrier

    DOE PAGESBeta

    Xue, H; Xiao, H Y; Zhu, Z; Shutthanandan, V; Snead, L; Boatner, Lynn A; Weber, William J.; Zhang, Yanwen

    2015-01-01

    For applications of tristructural isotropic (TRISO) fuel particles in high temperature reactors, release of radioactive Ag isotope (110mAg) through the SiC coating layer is a safety concern. To understand the diffusion mechanism, Ag ion implantations near the surface and in the bulk were performed by utilizing different ion energies and energy-degrader foils. High temperature annealing was carried out on the as-irradiated samples to study the possible out-surface diffusion. Before and after annealing, Rutherford backscattering spectrometry (RBS) and secondary ion mass spectrometry (SIMS) measurements were employed to obtain the elemental profiles of the implanted samples. The results suggest little migration ofmore » buried Ag in the bulk, and an out-diffusion of the implanted Ag in the near-surface region of single crystal SiC. It is also found that a SiO2 layer, which was formed during annealing, may serve as an effective barrier to reduce or prevent Ag out diffusion through the SiC coating layer.« less

  4. Ag Out-surface Diffusion In Crystalline SiC With An Effective SiO2 Diffusion Barrier

    SciTech Connect

    Xue, H.; Xiao, Haiyan Y.; Zhu, Zihua; Shutthanandan, V.; Snead, Lance L.; Boatner, Lynn A.; Weber, William J.; Zhang, Y.

    2015-09-01

    For applications of tristructural isotropic (TRISO) fuel particles in high temperature reactors, release of radioactive Ag isotope (110mAg) through the SiC coating layer is a safety concern. To understand the diffusion mechanism, Ag ion implantations near the surface and in the bulk were performed by utilizing different ion energies and energy-degrader foils. High temperature annealing was carried out on the as-irradiated samples to study the possible out-surface diffusion. Before and after annealing, Rutherford backscattering spectrometry (RBS) and secondary ion mass spectrometry (SIMS) measurements were employed to obtain the elemental profiles of the implanted samples. The results suggest little migration of buried Ag in the bulk, and an out-diffusion of the implanted Ag in the near-surface region of single crystal SiC. It is also found that a SiO2 layer, which was formed during annealing, may serve as an effective barrier to reduce or prevent Ag out diffusion through the SiC coating layer.

  5. An Epithelial Serine Protease, AgESP, Is Required for Plasmodium Invasion in the Mosquito Anopheles gambiae

    PubMed Central

    Rodrigues, Janneth; Oliveira, Giselle A.; Kotsyfakis, Michalis; Dixit, Rajnikant; Molina-Cruz, Alvaro; Jochim, Ryan; Barillas-Mury, Carolina

    2012-01-01

    Background Plasmodium parasites need to cross the midgut and salivary gland epithelia to complete their life cycle in the mosquito. However, our understanding of the molecular mechanism and the mosquito genes that participate in this process is still very limited. Methodology/Principal Findings We identified an Anopheles gambiae epithelial serine protease (AgESP) that is constitutively expressed in the submicrovillar region of mosquito midgut epithelial cells and in the basal side of the salivary glands that is critical for Plasmodium parasites to cross these two epithelial barriers. AgESP silencing greatly reduces Plasmodium berghei and Plasmodium falciparum midgut invasion and prevents the transcriptional activation of gelsolin, a key regulator of actin remodeling and a reported Plasmodium agonist. AgESP expression is highly induced in midgut cells invaded by Plasmodium, suggesting that this protease also participates in the apoptotic response to invasion. In salivary gland epithelial cells, AgESP is localized on the basal side–the surface with which sporozoites interact. AgESP expression in the salivary gland is also induced in response to P. berghei and P. falciparum sporozoite invasion, and AgESP silencing significantly reduces the number of sporozoites that invade this organ. Conclusion Our findings indicate that AgESP is required for Plasmodium parasites to effectively traverse the midgut and salivary gland epithelial barriers. Plasmodium parasites need to modify the actin cytoskeleton of mosquito epithelial cells to successfully complete their life cycle in the mosquito and AgESP appears to be a major player in the regulation of this process. PMID:22509400

  6. An ordered mesoporous Ag superstructure synthesized via a template strategy for surface-enhanced Raman spectroscopy

    NASA Astrophysics Data System (ADS)

    Tian, Cuifeng; Li, Jiang; Ma, Chunsheng; Wang, Ping; Sun, Xiaohong; Fang, Jixiang

    2015-07-01

    Surface-enhanced Raman scattering (SERS) substrates with high density and uniformity of nanogaps are proven to enhance the reproducibility and sensitivity of the Raman signal. Up to now, the syntheses of a highly ordered gold or silver superstructure with a controllable nanoparticle size and a well-defined particle gap have been quite limited. Here, we reported an ordered mesoporous silver superstructure replicated by using ordered mesoporous KIT-6 and SAB-15 as templates. By means of a nanocasting process, the ordered mesoporous Ag superstructure was successfully synthesized, which shows uniform distribution of the nanowire diameter (10 nm) and nanogap size (~2 nm), thus exhibiting a high Raman enhancement of ~109. The finite difference time-domain (FDTD) results indicate that the ordered mesoporous Ag superstructure has a uniform distribution of hot spots. Therefore, the mesoporous silica template strategy presented here could lead to a new class of high quality SERS substrates providing extraordinary potential for diverse applications.Surface-enhanced Raman scattering (SERS) substrates with high density and uniformity of nanogaps are proven to enhance the reproducibility and sensitivity of the Raman signal. Up to now, the syntheses of a highly ordered gold or silver superstructure with a controllable nanoparticle size and a well-defined particle gap have been quite limited. Here, we reported an ordered mesoporous silver superstructure replicated by using ordered mesoporous KIT-6 and SAB-15 as templates. By means of a nanocasting process, the ordered mesoporous Ag superstructure was successfully synthesized, which shows uniform distribution of the nanowire diameter (10 nm) and nanogap size (~2 nm), thus exhibiting a high Raman enhancement of ~109. The finite difference time-domain (FDTD) results indicate that the ordered mesoporous Ag superstructure has a uniform distribution of hot spots. Therefore, the mesoporous silica template strategy presented here could

  7. An example of a digital synthesis approach to DSP design: The AGS transverse damper

    SciTech Connect

    Brown, K.A.; Smith, G.; Wong, V.

    1997-07-01

    Using Verilog HDL and Synopsys, the digital signal processing of the AGS Transverse Damper was designed and fitted to an Altera Flex l0k FPGA. Using a control point specification style in the high level description greatly simplified the design by placing the burden of specifying the controller on the digital synthesizer. The basic design and low level simulation are presented as well as the design methodology. The purpose of the AGS Transverse Damper is to control instabilities and injection errors that may arise in high intensity proton beams being accelerated in the AGS. The system block diagram for the DSP is shown in Figure 1. The inputs to the system come from a normalization unit. This normalization unit takes two signals as input, a sum of beam position signal plates, and a difference from the plates. The output of the normalization unit is the difference divided by the sum. This Quotient is sent to the first ALU (as Qin[11..0]). Taking differences between position measurements the system acts as a notch filter. The Second ALU computes a running sum of the output of the first ALU. This then acts to remove any offsets in the Quotient (and thus this part acts as a high pass filter - removing any baseline components to the signal). The depth of the first FIFO (between adder and subtract units) basically determines the low pass behaviour. The multiplier serves the purpose of overall loop gain for the system (the complete system is a real-time feedback system). The FIFO on the output is used to provide the correct amount of delay for the system.

  8. Neal Lane: Confessions of a President's Science Advisor

    ScienceCinema

    Neal Lane

    2010-09-01

    Former science advisor to president Bill Clinton Neal Lane briefly reviews the history of the job of Science Advisor to the President and give some examples of issues he had to deal with when he was in that position, including climate change, stem cell research, the human genome, nanotechnology and research funding. He will also give his opinions about the present and future state of science in the U.S.

  9. Neal Lane: Confessions of a President's Science Advisor

    SciTech Connect

    Neal Lane

    2006-09-11

    Former science advisor to president Bill Clinton Neal Lane briefly reviews the history of the job of Science Advisor to the President and give some examples of issues he had to deal with when he was in that position, including climate change, stem cell research, the human genome, nanotechnology and research funding. He will also give his opinions about the present and future state of science in the U.S.

  10. Lithogeochemistry and fluid inclusions of an Au-Ag vein deposit in a granodiorite intrusive

    SciTech Connect

    Hahn, R.; Ikramuddin, M.

    1985-01-01

    Forty-eight samples of altered and unaltered rocks and quartz veins from the Acme mine in northeast Washington, an Au-Ag vein deposit in a granodiorite intrusive, have been analyzed for SiO/sub 2/, Al/sub 2/O/sub 3/, Fe/sub 2/O/sub 3/, Feo, MgO, CaO, Na/sub 2/O, K/sub 2/O, TiO/sub 2/, MnO, P/sub 2/O/sub 5/, H/sub 2/O, CO/sub 2/, Ag, Au, Ba, Cu, Pb, Rb, Sr, Tl, and Zn. A comparison of major and trace elements shows that the altered granodiorite is enriched in SiO/sub 2/, Fe/sub 2/O/sub 3/, K/sub 2/O, Ag, Au, Ba, Cu, Pb, Rb, Tl, and Zn and depleted in Al/sub 2/O/sub 3/, FeO, MgO, CaO, Na/sub 2/O, TiO/sub 2/, MnO, P/sub 2/O/sub 5/, and Sr. The average contents of Au in unaltered and altered granodiorite and quartz veins are 9 ppb. 270 ppb and 1020 ppb respectively. The average Ba/Tl ratio in the altered samples decrease and average Rb/Sr and Tl/Sr ratios increase. K, Rb, and Tl are enriched in the altered granodiorite by factors of 1.5, 1.6, and 1.4 respectively. Tl is not enriched relative to Rb and K in the altered samples due to the high temperature of the deposit. The Ba/Tl, K/Tl and K/Rb ratios do not show complete separation of altered from unaltered samples. However, the Ba/Tl and K/Tl ratios in the quartz vein are significantly lower than the unaltered and altered granodiorite. This is due to the enrichment of Tl over K and Rb in the quartz veins. The Rb/Sr and Tl/Sr ratios are higher in the altered granodiorite and quartz veins compared to unaltered samples. The enrichment of Tl and presence of low Ba/Tl and high Rb/Sr and Tl/Sr ratios in a granodiorite indicate that the rocks are hydrothermally altered and represent a possible Au-Ag target.

  11. Performance evaluation of 70 hepatitis B virus (HBV) surface antigen (HBsAg) assays from around the world by a geographically diverse panel with an array of HBV genotypes and HBsAg subtypes

    PubMed Central

    Scheiblauer, H; El-Nageh, M; Diaz, S; Nick, S; Zeichhardt, H; Grunert, H-P; Prince, A

    2010-01-01

    Background and Objectives This study was conducted by the International Consortium for Blood Safety (ICBS) to identify high-quality test kits for detection of hepatitis B virus (HBV) surface antigen (HBsAg) for the benefit of developing countries. Materials and Methods The 70 HBsAg test kits from around the world were evaluated comparatively for their clinical sensitivity, analytical sensitivity, sensitivity to HBV genotypes and HBsAg subtypes, and specificity using 394 (146 clinical, 48 analytical and 200 negative) ICBS Master Panel members of diverse geographical origin comprising the major HBV genotypes A-F and the HBsAg subtypes adw2,4, adr and ayw1-4. Results Seventeen HBsAg enzyme immunoassay (EIA) kits had high analytical sensitivity <0·13 IU/ml, showed 100% diagnostic sensitivity, and were even sensitive for the various HBV variants tested. An additional six test kits had high sensitivity (<0·13 IU/ml) but missed HBsAg mutants and/or showed reduced sensitivity to certain HBV genotypes. Twenty HBsAg EIA kits were in the sensitivity range of 0·13–1 IU/ml. The other eight EIAs and the 19 rapid assays had analytical sensitivities of 1 to >4 IU/ml. These assays were falsely negative for 1–4 clinical samples and 17 of these test kits showed genotype dependent sensitivity reduction. Analytical sensitivities for HBsAg of >1 IU/ml significantly reduce the length of the HBsAg positive period which renders them less reliable for detecting HBsAg in asymptomatic HBV infections. Reduced sensitivity for HBsAg with genetic diversity of HBV occurred with genotypes/subtypes D/ayw3, E/ayw4, F/adw4 and by S gene mutants. Specificity of the HBsAg assays was ≥99·5% in 57 test kits and 96·4–99·0% in the remaining test kits. Conclusion Diagnostic efficacy of the evaluated HBsAg test kits differed substantially. Laboratories should therefore be aware of the analytical sensitivity for HBsAg and check for the relevant HBV variants circulating in the relevant population

  12. Aggregation of Congo red with surfactants and Ag-nanoparticles in an aqueous solution

    NASA Astrophysics Data System (ADS)

    AL-Thabaiti, Shaeel Ahmed; Aazam, Elham Shafik; Khan, Zaheer; Bashir, Ommer

    2016-03-01

    Self aggregation, sorption, and interaction of Congo red, with cetyltrimethylammonium bromide (CTAB), sodium dodecylsulfate (SDS), Ag+ ions and silver nanoparticles have been determined spectrophotometrically. Congo red self-aggregation was identified from UV-visible spectra due to the shrinkage in an absorption band at 495 nm. The shape of the absorbance spectrum changed entirely with increasing [Congo red] but wavelength maxima remain unchanged. The molar absorptivity was found to be 9804 mol- 1 dm3 cm- 1 at 495 nm. Absorption spectra of Congo red with Ag+ ions show an isosbestic point. The complex formation constant and difference in absorption coefficients were found to be 8.5 × 104 mol- 1 dm3 and 11,764 mol- 1 dm3 cm- 1, respectively. Silver nano-particles could not be used for the catalytic degradation of Congo red because it results in the formation of a strong complex with them. Sodium dodecylsulfate did not show any significant interaction with this dye. Congo red was also used as a probe to determine the critical micellar concentration of CTAB.

  13. An intermetallic Au24Ag20 superatom nanocluster stabilized by labile ligands.

    PubMed

    Wang, Yu; Su, Haifeng; Xu, Chaofa; Li, Gang; Gell, Lars; Lin, Shuichao; Tang, Zichao; Häkkinen, Hannu; Zheng, Nanfeng

    2015-04-01

    An intermetallic nanocluster containing 44 metal atoms, Au24Ag20(2-SPy)4(PhC≡C)20Cl2, was successfully synthesized and structurally characterized by single-crystal analysis and density funtional theory computations. The 44 metal atoms in the cluster are arranged as a concentric three-shell Au12@Ag20@Au12 Keplerate structure having a high symmetry. For the first time, the co-presence of three different types of anionic ligands (i.e., phenylalkynyl, 2-pyridylthiolate, and chloride) was revealed on the surface of metal nanoclusters. Similar to thiolates, alkynyls bind linearly to surface Au atoms using their σ-bonds, leading to the formation of two types of surface staple units (PhC≡C-Au-L, L = PhC≡C(-) or 2-pyridylthiolate) on the cluster. The co-presence of three different surface ligands allows the site-specific surface and functional modification of the cluster. The lability of PhC≡C(-) ligands on the cluster was demonstrated, making it possible to keep the metal core intact while removing partial surface capping. Moreover, it was found that ligand exchange on the cluster occurs easily to offer various derivatives with the same metal core but different surface functionality and thus different solubility. PMID:25803406

  14. Fabrication and Characterisation of the Graphene Ring Micro Electrode (GRiME) with an Integrated, Concentric Ag/AgCl Reference Electrode

    PubMed Central

    Dickinson, James W.; Bromley, Michael; Andrieux, Fabrice P. L.; Boxall, Colin

    2013-01-01

    We report the fabrication and characterisation of the first graphene ring micro electrodes with the addition of a miniature concentric Ag/AgCl reference electrode. The graphene ring electrode is formed by dip coating fibre optics with graphene produced by a modified Hummers method. The reference electrode is formed using an established photocatalytically initiated electroless deposition (PIED) plating method. The performance of the so-formed graphene ring micro electrodes (GRiMEs) and associated reference electrode is studied using the probe redox system ferricyanide and electrode thicknesses assessed using established electrochemical methods. Using 220 μm diameter fibre optics, a ∼15 nm thick graphene ring electrode is obtained corresponding to an inner to outer radius ratio of >0.999, so allowing for use of extant analytical descriptions of very thin ring microelectrodes in data analysis. GRiMEs are highly reliable (current response invariant over >3,000 scans), with the concentric reference electrode showing comparable stability (current response invariant over >300 scans). Furthermore the micro-ring design allows for efficient use of electrochemically active graphene edge sites and the associated nA scale currents obtained neatly obviate issues relating to the high resistivity of undoped graphene. Thus, the use of graphene in ring microelectrodes improves the reliability of existing micro-electrode designs and expands the range of use of graphene-based electrochemical devices. PMID:23493126

  15. Fabrication and characterisation of the graphene ring micro electrode (GRiME) with an integrated, concentric Ag/AgCl reference electrode.

    PubMed

    Dickinson, James W; Bromley, Michael; Andrieux, Fabrice P L; Boxall, Colin

    2013-01-01

    We report the fabrication and characterisation of the first graphene ring micro electrodes with the addition of a miniature concentric Ag/AgCl reference electrode. The graphene ring electrode is formed by dip coating fibre optics with graphene produced by a modified Hummers method. The reference electrode is formed using an established photocatalytically initiated electroless deposition (PIED) plating method. The performance of the so-formed graphene ring micro electrodes (GRiMEs) and associated reference electrode is studied using the probe redox system ferricyanide and electrode thicknesses assessed using established electrochemical methods. Using 220 µm diameter fibre optics, a ~15 nm thick graphene ring electrode is obtained corresponding to an inner to outer radius ratio of >0.999, so allowing for use of extant analytical descriptions of very thin ring microelectrodes in data analysis. GRiMEs are highly reliable (current response invariant over >3,000 scans), with the concentric reference electrode showing comparable stability (current response invariant over >300 scans). Furthermore the micro-ring design allows for efficient use of electrochemically active graphene edge sites and the associated nA scale currents obtained neatly obviate issues relating to the high resistivity of undoped graphene. Thus, the use of graphene in ring microelectrodes improves the reliability of existing micro-electrode designs and expands the range of use of graphene-based electrochemical devices. PMID:23493126

  16. Adsorption Behavior of Cellulose and Its Derivatives toward Ag(I) in Aqueous Medium: An AFM, Spectroscopic, and DFT Study.

    PubMed

    Zhu, Chuantao; Dobryden, Illia; Rydén, Jens; Öberg, Sven; Holmgren, Allan; Mathew, Aji P

    2015-11-17

    The aim of this study was to develop a fundamental understanding of the adsorption behavior of metal ions on cellulose surfaces using experimental techniques supported by computational modeling, taking Ag(I) as an example. Force interactions among three types of cellulose microspheres (native cellulose and its derivatives with sulfate and phosphate groups) and the silica surface in AgNO3 solution were studied with atomic force microscopy (AFM) using the colloidal probe technique. The adhesion force between phosphate cellulose microspheres (PCM) and the silica surface in the aqueous AgNO3 medium increased significantly with increasing pH while the adhesion force slightly decreased for sulfate cellulose microspheres (SCM), and no clear adhesion force was observed for native cellulose microspheres (CM). The stronger adhesion enhancement for the PCM system is mainly attributed to the electrostatic attraction between Ag(I) and the negative silica surface. The observed force trends were in good agreement with the measured zeta potentials. The scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) analyses confirmed the presence of silver on the surface of cellulose microspheres after adsorption. This study showed that PCM with a high content of phosphate groups exhibited a larger amount of adsorbed Ag(I) than CM and SCM and possible clustering of Ag(I) to nanoparticles. The presence of the phosphate group and a wavenumber shift of the P-OH vibration caused by the adsorption of silver ions on the phosphate groups were further confirmed with computational studies using density functional theory (DFT), which gives support to the above findings regarding the adsorption and clustering of Ag(I) on the cellulose surface decorated with phosphate groups as well as IR spectra. PMID:26501836

  17. An Ag based brazing system with a tunable thermal expansion for the use as sealant for solid oxide cells

    NASA Astrophysics Data System (ADS)

    Kiebach, Ragnar; Engelbrecht, Kurt; Grahl-Madsen, Laila; Sieborg, Bertil; Chen, Ming; Hjelm, Johan; Norrman, Kion; Chatzichristodoulou, Christodoulos; Hendriksen, Peter Vang

    2016-05-01

    An Ag-Al2TiO5 composite braze was developed and successfully tested as seal for solid oxide cells. The thermo-mechanical properties of the Ag-Al2TiO5 system and the chemical compatibility between this composite braze and relevant materials used in stacks were characterized and the leak rates as a function of the operation temperature were measured. The thermal expansion coefficient in the Ag-Al2TiO5 system can be tailored by varying the amount of the ceramic filler. The brazing process can be carried out in air, the joining partners showed a good chemical stability and sufficient low leak rates were demonstrated. Furthermore, the long-term stability of the Ag-Al2TiO5 composite braze was studied under relevant SOFC and SOEC conditions. The stability of brazed Crofer/Ag-Al2TiO5/NiO-YSZ assemblies in reducing atmosphere and in pure oxygen was investigated over 500 h at 850 °C. Additionally, a cell component test was performed to investigate the durability of the Ag-Al2TiO5 seal when exposed to dual atmosphere. The seals performed well over 900 h under electrolysis operation conditions (-0.5 A cm2, 850 °C), and no cell degradation related to the Ag-Al2TiO5 sealing was found, indicating that the developed braze system is applicable for the use in SOFC/SOEC stacks.

  18. Preliminary design studies for an iridium rod target at the BNL-AGS

    SciTech Connect

    Ludewig, H.; Hastings, J.; Montanez, P.; Todosow, M.

    1998-12-31

    The BNL-AGS is an intense source of 24 GeV protons. It is proposed to explore the potential to use these protons as the driver for a Pulsed Spallation Neutron Source target. The proposed target design is based on an edge cooled iridium rod concept--similar to the anti-proton production target which operated reliably at CERN under similar conditions. Lead, lead fluoride, and beryllium are investigated as possible reflector materials, and ambient temperature light water and 80 K light water ice are proposed as initial moderator materials. Both moderators are decoupled by cadmium containing moderator chamber walls. The small size of the target has the advantage that the moderators can be placed close to the target (resulting in a bright source), and since a large fraction of the radioactive inventory is contained in the iridium rod, removal and disposition of this inventory should be relatively simple and inexpensive.

  19. A platonic solid templating Archimedean solid: an unprecedented nanometre-sized Ag37 cluster

    NASA Astrophysics Data System (ADS)

    Li, Xiao-Yu; Su, Hai-Feng; Yu, Kai; Tan, Yuan-Zhi; Wang, Xing-Po; Zhao, Ya-Qin; Sun, Di; Zheng, Lan-Sun

    2015-04-01

    The spontaneous formation of discrete spherical nanosized molecules is prevalent in nature, but the authentic structural mimicry of such highly symmetric polyhedra from edge sharing of regular polygons has remained elusive. Here we present a novel ball-shaped {(HNEt3)[Ag37S4(SC6H4tBu)24(CF3COO)6(H2O)12]} cluster (1) that is assembled via a one-pot process from polymeric {(HNEt3)2[Ag10(SC6H4tBu)12]}n and CF3COOAg. Single crystal X-ray analysis confirmed that 1 is a Td symmetric spherical molecule with a [Ag36(SC6H4tBu)24] anion shell enwrapping a AgS4 tetrahedron. The shell topology of 1 belongs to one of 13 Archimedean solids, a truncated tetrahedron with four edge-shared hexagons and trigons, which are supported by a AgS4 Platonic solid in the core. Interestingly, the cluster emits green luminescence centered at 515 nm at room temperature. Our investigations have provided a promising synthetic protocol for a high-nuclearity silver cluster based on underlying geometrical principles.The spontaneous formation of discrete spherical nanosized molecules is prevalent in nature, but the authentic structural mimicry of such highly symmetric polyhedra from edge sharing of regular polygons has remained elusive. Here we present a novel ball-shaped {(HNEt3)[Ag37S4(SC6H4tBu)24(CF3COO)6(H2O)12]} cluster (1) that is assembled via a one-pot process from polymeric {(HNEt3)2[Ag10(SC6H4tBu)12]}n and CF3COOAg. Single crystal X-ray analysis confirmed that 1 is a Td symmetric spherical molecule with a [Ag36(SC6H4tBu)24] anion shell enwrapping a AgS4 tetrahedron. The shell topology of 1 belongs to one of 13 Archimedean solids, a truncated tetrahedron with four edge-shared hexagons and trigons, which are supported by a AgS4 Platonic solid in the core. Interestingly, the cluster emits green luminescence centered at 515 nm at room temperature. Our investigations have provided a promising synthetic protocol for a high-nuclearity silver cluster based on underlying geometrical principles

  20. Ag-nanoparticles on UF-microsphere as an ultrasensitive SERS substrate with unique features for rhodamine 6G detection.

    PubMed

    Hao, Zhixian; Mansuer, Mulati; Guo, Yuqing; Zhu, Zhirong; Wang, Xiaogang

    2016-01-01

    Urea and formaldehyde (UF) microsphere (MS) adsorbing Ag nanoparticles (NPs) was employed as a surface enhanced Raman scattering (SERS) substrate for rhodamine 6G (R6G) detection. The UF MSs and citrate-reduced Ag colloid supplying Ag NPs are synthesized separately and all the subsequent fabrication procedure is then implemented within 2 mL centrifuge tube. Influences of the composition and drying temperature of the UF MSs and the drying method and modification of AgNP/UFMS on the final SERS performance have first been reported. Excess formaldehyde useful in the formation of UF MSs again plays an important role in the SERS detection. Some interesting phenomena in the approach, such as swelling/deswelling of UF MSs and R6G diffusion within hydrophilic environment of UF MSs, are found to be of variable factors affecting the SERS performance. The substrate AgNP/UFMS confidently achieves a detection limit of 10(-13) M R6G and can be used as a simple and effective platform in the SERS spectroscopy. PMID:26695301

  1. AgRISTARS

    NASA Technical Reports Server (NTRS)

    1984-01-01

    An introduction to the overall AgRISTARS program, a general statement on progress, and separate summaries of the activities of each project, with emphasis on the technical highlights are presented. Organizational and management information on AgRISTARS is included in the appendices, as is a complete bibliography of publication and reports.

  2. A platonic solid templating Archimedean solid: an unprecedented nanometre-sized Ag37 cluster.

    PubMed

    Li, Xiao-Yu; Su, Hai-Feng; Yu, Kai; Tan, Yuan-Zhi; Wang, Xing-Po; Zhao, Ya-Qin; Sun, Di; Zheng, Lan-Sun

    2015-05-14

    The spontaneous formation of discrete spherical nanosized molecules is prevalent in nature, but the authentic structural mimicry of such highly symmetric polyhedra from edge sharing of regular polygons has remained elusive. Here we present a novel ball-shaped {(HNEt3)[Ag37S4(SC6H4(t)Bu)24(CF3COO)6(H2O)12]} cluster () that is assembled via a one-pot process from polymeric {(HNEt3)2[Ag10(SC6H4(t)Bu)12]}n and CF3COOAg. Single crystal X-ray analysis confirmed that is a Td symmetric spherical molecule with a [Ag36(SC6H4(t)Bu)24] anion shell enwrapping a AgS4 tetrahedron. The shell topology of belongs to one of 13 Archimedean solids, a truncated tetrahedron with four edge-shared hexagons and trigons, which are supported by a AgS4 Platonic solid in the core. Interestingly, the cluster emits green luminescence centered at 515 nm at room temperature. Our investigations have provided a promising synthetic protocol for a high-nuclearity silver cluster based on underlying geometrical principles. PMID:25882899

  3. Expanding the Use of Time-Based Metering: Multi-Center Traffic Management Advisor

    NASA Technical Reports Server (NTRS)

    Landry, Steven J.; Farley, Todd; Hoang, Ty

    2005-01-01

    Time-based metering is an efficient air traffic management alternative to the more common practice of distance-based metering (or "miles-in-trail spacing"). Despite having demonstrated significant operational benefit to airspace users and service providers, time-based metering is used in the United States for arrivals to just nine airports and is not used at all for non-arrival traffic flows. The Multi-Center Traffic Management Advisor promises to bring time-based metering into the mainstream of air traffic management techniques. Not constrained to operate solely on arrival traffic, Multi-Center Traffic Management Advisor is flexible enough to work in highly congested or heavily partitioned airspace for any and all traffic flows in a region. This broader and more general application of time-based metering is expected to bring the operational benefits of time-based metering to a much wider pool of beneficiaries than is possible with existing technology. It also promises to facilitate more collaborative traffic management on a regional basis. This paper focuses on the operational concept of the Multi-Center Traffic Management Advisor, touching also on its system architecture, field test results, and prospects for near-term deployment to the United States National Airspace System.

  4. Intermetallic compounds formed at the interface between Cu substrate and an Sn-9Zn-0.5Ag lead-free solder

    SciTech Connect

    Chang, T.-C.; Hon, M.-H.; Wang, M.-C

    2003-04-30

    The intermetallic compounds (IMCs) formed at the interface between Cu substrate and an Sn-9Zn-0.5Ag lead-free solder alloy have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron diffraction (ED). The XRD patterns show that the main IMCs formed at the interface of Sn-9Zn-0.5Ag/Cu are {gamma}-Cu{sub 5}Zn{sub 8} and {eta}'-Cu{sub 6}Sn{sub 5}. The Ag{sub 3}Sn IMC with orthorhombic structure was also observed at the Sn-9Zn-0.5Ag/Cu interface by TEM and ED analyses. The interfacial adhesion strength between the Cu substrate and Sn-9Zn-0.5Ag lead-free solder alloy is higher than that of the Sn-9Zn alloy due to the formation of Ag{sub 3}Sn IMC at the interface.

  5. Facing page test for the astronaut science advisor presentation

    NASA Technical Reports Server (NTRS)

    Compton, Michael M.

    1991-01-01

    The goal of the Astronaut Science Advisor (ASA) project is to improve the scientific return of experiments performed in space by providing astronaut experimenters with an 'intelligent assistant' that encapsulates much of the domain- and experiment-related knowledge commanded by the Principal Investigator (PI) on the ground. By using expert systems technology and the availability of flight-qualified personal computers, it is possible to encode the requisite knowledge and make it available to astronauts as they perform experiments in space. The system performs four major functions: diagnosis and troubleshooting of experiment apparatus, data collection, protocol management, and detection of interesting data. The experiment used for development of the system measures human adaptation to weightlessness in the context of the neurovestibular system. This so-called 'Rotating Dome' experiment was flown on the recent Spacelab Life Sciences One (SLS-1) Mission. This mission was used as an opportunity to test some of the system's functionality. Experiment data was downlinked from the orbiter, and the system then captured the data and analyzed it in real time. The system kept track of the time being used by the experiment, recognized occurrences of interesting data, summarized data statistically and generated potential new protocols that could be used to optimize the course of the experiment.

  6. 76 FR 7593 - President's Council of Advisors on Science and Technology; Notice of Meeting: Partially Closed...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-10

    ... two years of undergraduate science, technology, engineering, and mathematics education. Additional... TECHNOLOGY POLICY President's Council of Advisors on Science and Technology; Notice of Meeting: Partially Closed Meeting of the President's Council of Advisors on Science and Technology ACTION: Public...

  7. 75 FR 11949 - Lincoln Investment Advisors Corporation and Lincoln Variable Insurance Products Trust; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-12

    ... COMMISSION Lincoln Investment Advisors Corporation and Lincoln Variable Insurance Products Trust; Notice of... requirements. Applicants: Lincoln Investment Advisors Corporation (``Adviser'') and Lincoln Variable Insurance..., One Granite Place, Concord, NH 03301 and Lincoln Variable Insurance Products Trust, 1300 S....

  8. 75 FR 47317 - President's Council of Advisors on Science and Technology

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-05

    ... topics of advanced manufacturing; science, technology, engineering, and mathematics (STEM) education; and... TECHNOLOGY POLICY President's Council of Advisors on Science and Technology Notice of Meeting: Partially Closed Meeting of the President's Council of Advisors on Science and Technology. ACTION: Public...

  9. Solar Advisor Model User Guide for Version 2.0

    SciTech Connect

    Gilman, P.; Blair, N.; Mehos, M.; Christensen, C.; Janzou, S.; Cameron, C.

    2008-08-01

    The Solar Advisor Model (SAM) provides a consistent framework for analyzing and comparing power system costs and performance across the range of solar technologies and markets, from photovoltaic systems for residential and commercial markets to concentrating solar power and large photovoltaic systems for utility markets. This manual describes Version 2.0 of the software, which can model photovoltaic and concentrating solar power technologies for electric applications for several markets. The current version of the Solar Advisor Model does not model solar heating and lighting technologies.

  10. When questions arise, physician advisors are there with the answers.

    PubMed

    2016-06-01

    DCH Health System's seven part-time physician advisors perform a variety of tasks to help ensure that the hospitals are appropriately reimbursed and that patients move smoothly through the continuum of care. They work with care managers on patient status and also assist with documentation, writing medical necessity appeals, resource utilization, and patient throughput. They attend daily transition rounds with the nurses, care managers, and social workers, and participate in weekly long-stay rounds and capacity rounds in the ICU and acute cardiac care. The health system brought in experts to educate the physician advisors, sent them to educational symposia, and pays for membership in professional organizations. PMID:27323508

  11. Natural water as the test medium for Ag and CuO nanoparticle hazard evaluation: An interlaboratory case study.

    PubMed

    Heinlaan, Margit; Muna, Marge; Knöbel, Melanie; Kistler, David; Odzak, Niksa; Kühnel, Dana; Müller, Josefine; Gupta, Govind Sharan; Kumar, Ashutosh; Shanker, Rishi; Sigg, Laura

    2016-09-01

    Engineered nanoparticles (NPs) have realistic potential of reaching natural waterbodies and of exerting toxicity to freshwater organisms. The toxicity may be influenced by the composition of natural waters as crucial NP properties are influenced by water constituents. To tackle this issue, a case study was set up in the framework of EU FP7 NanoValid project, performing an interlaboratory hazard evaluation of NPs in natural freshwater. Ag and CuO NPs were selected as model NPs because of their potentially high toxicity in the freshwater. Daphnia magna (OECD202) and Danio rerio embryo (OECD236) assays were used to evaluate NP toxicity in natural water, sampled from Lake Greifen and Lake Lucerne (Switzerland). Dissolution of the NPs was evaluated by ultrafiltration, ultracentrifugation and metal specific sensor bacteria. Ag NP size was stable in natural water while CuO NPs agglomerated and settled rapidly. Ag NP suspensions contained a large fraction of Ag(+) ions and CuO NP suspensions had low concentration of Cu(2+) ions. Ag NPs were very toxic (48 h EC50 1-5.5 μg Ag/L) to D. magna as well as to D. rerio embryos (96 h EC50 8.8-61 μg Ag/L) in both standard media and natural waters with results in good agreement between laboratories. CuO NP toxicity to D. magna differed significantly between the laboratories with 48 h EC50 0.9-11 mg Cu/L in standard media, 5.7-75 mg Cu/L in Lake Greifen and 5.5-26 mg Cu/L in Lake Lucerne. No toxicity of CuO NP to zebrafish embryos was detected up to 100 mg/L independent of the medium used. The results show that Ag and CuO NP toxicity may be higher in natural water than in the standard media due to differences in composition. NP environmental hazard evaluation can and should be carried out in natural water to obtain more realistic estimates on the toxicity. PMID:27357482

  12. The design and implementation of a ventilator-management advisor.

    PubMed

    Rutledge, G W; Thomsen, G E; Farr, B R; Tovar, M A; Polaschek, J X; Beinlich, I A; Sheiner, L B; Fagan, L M

    1993-02-01

    VentPlan is an implementation of the architecture developed by the qualitative-quantitative (QQ) research group for combining qualitative and quantitative computation in a ventilator-management advisor (VMA). VentPlan calculates recommended settings for four controls of a ventilator by evaluating the predicted effects of alternative ventilator settings. A belief network converts clinical diagnoses to distributions on physiologic parameters. A mathematical-modeling module applies a patient-specific mathematical model of cardiopulmonary physiology to predict the effects of alternative ventilator settings. A decision-theoretic plan evaluator ranks the predicted effects of alternative ventilator settings according to a multiattribute-value model that specifies physician preferences for ventilator treatments. Our architecture allows VentPlan to interpret quantitative observations in light of the clinical context (such as the clinical diagnosis). We report a retrospective study of the ventilator-setting changes encountered in postoperative patients in a surgical intensive-care unit (ICU). We conclude that the QQ architecture allows VentPlan to apply a patient-specific physiologic model to calculate ventilator settings that are optimal with respect to a decision-theoretic value model describing physician preferences for setting the ventilator. PMID:8358487

  13. Controller evaluations of the descent advisor automation aid

    NASA Technical Reports Server (NTRS)

    Tobias, Leonard; Volckers, Uwe; Erzberger, Heinz

    1989-01-01

    An automation aid to assist air traffic controllers in efficiently spacing traffic and meeting arrival times at a fix has been developed at NASA Ames Research Center. The automation aid, referred to as the descent advisor (DA), is based on accurate models of aircraft performance and weather conditions. The DA generates suggested clearances, including both top-of-descent point and speed profile data, for one or more aircraft in order to achieve specific time or distance separation objectives. The DA algorithm is interfaced with a mouse-based, menu-driven controller display that allows the air traffic controller to interactively use its accurate predictive capability to resolve conflicts and issue advisories to arrival aircraft. This paper focuses on operational issues concerning the utilization of the DA, specifically, how the DA can be used for prediction, intrail spacing, and metering. In order to evaluate the DA, a real time simulation was conducted using both current and retired controller subjects. Controllers operated in teams of two, as they do in the present environment; issues of training and team interaction will be discussed. Evaluations by controllers indicated considerable enthusiasm for the DA aid, and provided specific recommendations for using the tool effectively.

  14. An Atomically Precise Au10 Ag2 Nanocluster with Red-Near-IR Dual Emission.

    PubMed

    Lei, Zhen; Guan, Zong-Jie; Pei, Xiao-Li; Yuan, Shang-Fu; Wan, Xian-Kai; Zhang, Jin-Yuan; Wang, Quan-Ming

    2016-08-01

    A red-near-IR dual-emissive nanocluster with the composition [Au10 Ag2 (2-py-C≡C)3 (dppy)6 ](BF4 )5 (1; 2-py-C≡C is 2-pyridylethynyl, dppy=2-pyridyldiphenylphosphine) has been synthesized. Single-crystal X-ray structural analysis reveals that 1 has a trigonal bipyramidal Au10 Ag2 core that contains a planar Au4 (2-py-C≡C)3 unit sandwiched by two Au3 Ag(dppy)3 motifs. Cluster 1 shows intense red-NIR dual emission in solution. The visible emission originates from metal-to-ligand charge transfer (MLCT) from silver atoms to phosphine ligands in the Au3 Ag(dppy)3 motifs, and the intense NIR emission is associated with the participation of 2-pyridylethynyl in the frontier orbitals of the cluster, which is confirmed by a time-dependent density functional theory (TD-DFT) calculation. PMID:27305386

  15. Synthesis and antimicrobial activities of silver(I) sulfanylcarboxylates. Structural isomers with identically or unequally coordinated Ag centers in an Ag4S4 ring.

    PubMed

    Barreiro, Elena; Casas, José S; Couce, María D; Sánchez, Agustín; Seoane, Rafael; Sordo, José; Varela, José M; Vázquez-López, Ezequiel M

    2007-07-28

    We have investigated the reactions of silver nitrate and 3-(aryl)-2-sulfanylpropenoic acids [H(2)xspa, x: p = 3-phenyl-, f = 3-(2-furyl)-, t = 3-(2-thienyl)-, py = 3-(2-pyridyl)-] and 2-cyclopentylidene-2-sulfanylacetic acid (H(2)L) in 1 : 1 and 2 : 1 molar ratios. The 1 : 1 molar ratio gave compounds of type [Ag(HL)]; reaction of these compounds with diisopropylamine and NaOH gave [HQ][Ag(L)] (HQ = diisopropylammonium) and Na[Ag(L)] x H(2)O, respectively. These compounds, as well as those of type [Ag(2)(L)] obtained with the 1 : 2 molar ratio, were isolated and characterized by IR and NMR ((1)H and (13)C) spectroscopy. (109)Ag NMR spectroscopy and ESI-MS spectrometry were also used in some cases. The crystal structures of [HQ][Ag(pspa)] (11), in which the presence of structural isomers was detected, and [HQ][Ag(cpa)] (15) were determined by X-ray diffractometry. The antimicrobial activity of the complexes against E. coli, S. aureus, B. subtilis, P. aeruginosa/Resistant P. aeruginosa, and C. albicans was tested. PMID:17622425

  16. An in-situ synthesis of Ag/AgCl/TiO2/hierarchical porous magnesian material and its photocatalytic performance

    PubMed Central

    Yang, Lu; Wang, Fazhou; Shu, Chang; Liu, Peng; Zhang, Wenqin; Hu, Shuguang

    2016-01-01

    The absorption ability and photocatalytic activity of photocatalytic materials play important roles in improving the pollutants removal effects. Herein, we reported a new kind of photocatalytic material, which was synthesized by simultaneously designing hierarchical porous magnesian (PM) substrate and TiO2 catalyst modification. Particularly, PM substrate could be facilely prepared by controlling its crystal phase (Phase 5, Mg3Cl(OH)5·4H2O), while Ag/AgCl particles modification of TiO2 could be achieved by in situ ion exchange between Ag+ and above crystal Phase. Physiochemical analysis shows that Ag/AgCl/TiO2/PM material has higher visible and ultraviolet light absorption response, and excellent gas absorption performance compared to other controls. These suggested that Ag/AgCl/TiO2/PM material could produce more efficient photocatalytic effects. Its photocatalytic reaction rate was 5.21 and 30.57 times higher than that of TiO2/PM and TiO2/imporous magnesian substrate, respectively. Thus, this material and its intergration synthesis method could provide a novel strategy for high-efficiency application and modification of TiO2 photocatalyst in engineering filed. PMID:26883972

  17. An in-situ synthesis of Ag/AgCl/TiO2/hierarchical porous magnesian material and its photocatalytic performance

    NASA Astrophysics Data System (ADS)

    Yang, Lu; Wang, Fazhou; Shu, Chang; Liu, Peng; Zhang, Wenqin; Hu, Shuguang

    2016-02-01

    The absorption ability and photocatalytic activity of photocatalytic materials play important roles in improving the pollutants removal effects. Herein, we reported a new kind of photocatalytic material, which was synthesized by simultaneously designing hierarchical porous magnesian (PM) substrate and TiO2 catalyst modification. Particularly, PM substrate could be facilely prepared by controlling its crystal phase (Phase 5, Mg3Cl(OH)5·4H2O), while Ag/AgCl particles modification of TiO2 could be achieved by in situ ion exchange between Ag+ and above crystal Phase. Physiochemical analysis shows that Ag/AgCl/TiO2/PM material has higher visible and ultraviolet light absorption response, and excellent gas absorption performance compared to other controls. These suggested that Ag/AgCl/TiO2/PM material could produce more efficient photocatalytic effects. Its photocatalytic reaction rate was 5.21 and 30.57 times higher than that of TiO2/PM and TiO2/imporous magnesian substrate, respectively. Thus, this material and its intergration synthesis method could provide a novel strategy for high-efficiency application and modification of TiO2 photocatalyst in engineering filed.

  18. 77 FR 37079 - Versus Capital Multi-Manager Real Estate Income Fund LLC and Versus Capital Advisors; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-20

    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION Versus Capital Multi-Manager Real Estate Income Fund LLC and Versus Capital Advisors; Notice of Application June 14, 2012. AGENCY: Securities and Exchange Commission (``Commission''). ACTION: Notice of an application under section 6(c) of...

  19. The Honors Thesis: A Handbook for Honors Directors, Deans, and Faculty Advisors. National Collegiate Honors Council Monograph Series

    ERIC Educational Resources Information Center

    Anderson, Mark; Lyons, Karen; Weiner, Norman

    2014-01-01

    This handbook is intended to help all those who design, administer, and implement honors thesis programs--honors directors, deans, staff, faculty, and advisors--evaluate their thesis programs, solve pressing problems, select more effective requirements or procedures, or introduce an entirely new thesis program. The authors' goal is to provide…

  20. The AgNORs.

    PubMed

    Derenzini, M

    2000-04-01

    The structure and the function of interphase AgNORs and the importance of the "AgNOR" parameter in tumor pathology have been reviewed. Interphase AgNORs are structural-functional units of the nucleolus in which all the components necessary for ribosomal RNA synthesis are located. Two argyrophilic proteins involved in rRNA transcription and processing, nucleolin and nucleophosmin, are associated with interphase AgNORs and are responsible for their stainability with silver methods, thus allowing interphase AgNORs to be visulaized at light microscopic level, also in routine cyto-histopathological preparations. The number of interphase AgNORs is strictly related to rRNA transcriptional activity and, in continuously proliferating cells, to the rapidity of cell proliferation. Evaluation of the quantitative distribution of interphase AgNORs has been applied in tumor pathology both for diagnostic and prognostic purposes. The "AgNOR" parameter has been proved to represent a reliable tool for defining the clinical outcome of cancer disease, being an independent prognostic factor in many types of tumors. PMID:10588056

  1. 17 CFR 4.14 - Exemption from registration as a commodity trading advisor.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... a commodity trading advisor. 4.14 Section 4.14 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION COMMODITY POOL OPERATORS AND COMMODITY TRADING ADVISORS General Provisions, Definitions and Exemptions § 4.14 Exemption from registration as a commodity trading advisor. This section...

  2. SADDLE HORSE AND OTHER LIVESTOCK ADVISORS' PERCEPTIONS OF 4-H CLUB WORK IN OHIO.

    ERIC Educational Resources Information Center

    GROVES, ROBERT H.

    PERCEPTIONS AND UNDERSTANDINGS OF 4-H OBJECTIVES AND PROGRAMS OF 4-H SADDLE HORSE ADVISORS WERE COMPARED WITH THOSE OF OTHER LIVESTOCK ADVISORS IN NORTHEASTERN AND SOUTHWESTERN DISTRICTS OF OHIO. DATA WERE COLLECTED BY QUESTIONNAIRES FROM 90 SADDLE HORSE AND 133 OTHER LIVESTOCK ADVISORS. STATE 4-H STAFF AND SUPERVISORS PROVIDED CORRECT ANSWERS.…

  3. 77 FR 4289 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-27

    ... President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of Education, President's Board of Advisors on Historically Black Colleges and Universities (Board). ACTION... President's Board of Advisors on Historically Black Colleges and Universities. The notice also describes...

  4. 78 FR 31910 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-28

    ... President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of Education, President's Board of Advisors on Historically Black Colleges and Universities (Board). ACTION... President's Board of Advisors on Historically Black Colleges and Universities. The notice also describes...

  5. 78 FR 57135 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-17

    ... President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of Education, President's Board of Advisors on Historically Black Colleges and Universities. ACTION: Notice of... President's Board of Advisors on Historically Black Colleges and Universities. The notice also describes...

  6. 76 FR 30323 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-25

    ... President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of Education, President's Board of Advisors on Historically Black Colleges and Universities (Board). ACTION... President's Board of Advisors on Historically Black Colleges and Universities. The notice also describes...

  7. 77 FR 74230 - PNC Capital Advisors, LLC, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-13

    ... COMMISSION PNC Capital Advisors, LLC, et al.; Notice of Application December 6, 2012. AGENCY: Securities and... the Act to invest in certain financial instruments. Applicants: PNC Capital Advisors, LLC (``PNC Capital Advisors''), PNC Funds and PNC Advantage Funds (together, the ``Trusts''), and PNC...

  8. A Qualitative Inquiry into the Training and Development Provided to Community College Academic Advisors

    ERIC Educational Resources Information Center

    Mikluscak, George Steven, Jr.

    2010-01-01

    The qualitative study explored the training and development provided to Community College academic advisors who are members of the National Academic Advising Association (NACADA). The purpose was to investigate the factors academic advisors believe are crucial for the support of their roles as advisors. Professional, faculty, and self-identified…

  9. 78 FR 68040 - President's Council of Advisors on Science and Technology Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-13

    ... President's Council of Advisors on Science and Technology Meeting AGENCY: Department of Energy. ACTION... partially-closed meeting of the President's Council of Advisors on Science and Technology (PCAST), and..., first-served basis. SUPPLEMENTARY INFORMATION: The President's Council of Advisors on ] Science...

  10. 17 CFR 4.14 - Exemption from registration as a commodity trading advisor.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... a commodity trading advisor. 4.14 Section 4.14 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION COMMODITY POOL OPERATORS AND COMMODITY TRADING ADVISORS General Provisions, Definitions and Exemptions § 4.14 Exemption from registration as a commodity trading advisor. This section...

  11. 17 CFR 4.14 - Exemption from registration as a commodity trading advisor.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... a commodity trading advisor. 4.14 Section 4.14 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION COMMODITY POOL OPERATORS AND COMMODITY TRADING ADVISORS General Provisions, Definitions and Exemptions § 4.14 Exemption from registration as a commodity trading advisor. This section...

  12. 17 CFR 4.14 - Exemption from registration as a commodity trading advisor.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... a commodity trading advisor. 4.14 Section 4.14 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION COMMODITY POOL OPERATORS AND COMMODITY TRADING ADVISORS General Provisions, Definitions and Exemptions § 4.14 Exemption from registration as a commodity trading advisor. This section...

  13. Future Farmers of America--A Profile of Chapters and Advisors.

    ERIC Educational Resources Information Center

    Gordon, Howard R. D.

    A study was conducted to collect information related to Future Farmers of America (FFA) advisors, chapters, and school characteristics. Specific objectives were to determine FFA activities influenced by the advisor's experience, and to identify factors perceived as contributing to the preparation of teachers for the role of advisor and to the…

  14. Biochemical and biophysical characterization of maize-derived HBsAg for the development of an oral vaccine.

    PubMed

    Shah, Shweta; Hayden, Celine A; Fischer, Maria E; Rao, A Gururaj; Howard, John A

    2015-12-15

    Although a vaccine against hepatitis B virus (HBV) has been available since 1982, it is estimated that 600,000 people die every year due to HBV. An affordable oral vaccine could help alleviate the disease burden and to this end the hepatitis B surface antigen (HBsAg) was expressed in maize. Orally delivered maize material induced the strongest immune response in mice when lipid was extracted by CO2 supercritical fluid extraction (SFE), compared to full fat and hexane-extracted material. The present study provides a biochemical and biophysical basis for these immunological differences by comparing the active ingredient in the differently treated maize material. Purified maize-derived HBsAg underwent biophysical characterization by gel filtration, transmission electron microscopy (TEM), dynamic light scattering (DLS), UV-CD, and fluorescence. Gel filtration showed that HBsAg forms higher-order oligomers and TEM demonstrated virus-like particle (VLP) formation. The VLPs obtained from SFE were more regular in shape and size compared to hexane or full fat material. In addition, SFE-derived HBsAg showed the greatest extent of α-helical structure by far UV-CD spectrum. Fluorescence experiments also revealed differences in protein conformation. This work establishes SFE-treated maize material as a viable oral vaccine candidate and advances the development of the first oral subunit vaccine. PMID:26519888

  15. Characterization of silver-kaolinite (AgK): an adsorbent for long-lived (129)I species.

    PubMed

    Sadasivam, Sivachidambaram; Rao, Sudhakar M

    2016-01-01

    Bentonite is a preferred buffer and backfill material for deep geological disposal of high-level nuclear waste (HLW). Bentonite does not retain anions by virtue of its negatively charged basal surface. Imparting anion retention ability to bentonite is important to enable the expansive clay to retain long-lived (129)I (iodine-129; half-life = 16 million years) species that may escape from the HLW geological repository. Silver-kaolinite (AgK) material is prepared as an additive to improve the iodide retention capacity of bentonite. The AgK is prepared by heating kaolinite-silver nitrate mix at 400 °C to study the kaolinite influence on the transition metal ion when reacting at its dehydroxylation temperature. Thermo gravimetric-Evolved Gas Detection analysis, X-ray diffraction analysis, X-ray photo electron spectroscopy and electron probe micro analysis indicated that silver occurs as AgO/Ag2O surface coating on thermally reacting kaolinite with silver nitrate at 400 °C. PMID:27026839

  16. Spontaneous Formation of A Nanotube From A Square Ag Nanowire: An Atomistic View

    NASA Astrophysics Data System (ADS)

    Konuk Onat, Mine; Durukanoglu, Sondan

    2012-02-01

    We have performed molecular static calculations to investigate the recently observed phenomenon of the spontaneous formation of a nanotube from a regular, square Ag nanowire[1]. In the simulations, atoms are allowed to interact via the model potential obtained from the modified embedded atom method. Our simulations predict that this particular type of structural phase transformation is controlled by the nature of applied strain, length of the wire and initial cross-sectional shape. For such a perfect structural transformation, the <100> axially oriented fcc nanowire needs (1) to be formed by stacking A and B layers of an fcc crystal, both possessing the geometry of two interpenetrating one-lattice-parameter-wide squares, containing four atoms each, (2) to have an optimum length of eight layers, and (3) to be exposed to a combination of low and high stress along the length direction. The results further offer insights into atomistic nature of this specific structural transformation into a nanotube with the smallest possible cross-section. [1] M.J. Lagos et al., Nature Nanotech. 4, 149 (2009).

  17. An Evaluation of Prototype Circuit Boards Assembled with a Sn-Ag Bi Solder

    SciTech Connect

    ARTAKI,I.; RAY,U.; REJENT,JEROME A.; VIANCO,PAUL T.

    1999-09-01

    An evaluation was performed which examined the aging of surface mount solder joints assembled with 91.84Sn-3.33Ag-4.83Bi solder. Defect analysis of the as-fabricated test vehicles revealed excellent solderability, good package alignment, and a minimum number of voids. Continuous DC electrical monitoring of the solder joints did not reveal opens during as many as 10,000 thermal cycles (0 C, 100 C). The solder joints exhibited no significant degradation through 2500 cycles, based upon an absence of microstructural damage and sustained shear and pull strengths of chip capacitors and J-leaded solder joints, respectively. Thermal cycles of 5000 and 10,000 resulted in some surface cracking of the solder fillets and coatings. In a few cases, deeper cracks were observed in the thinner reaches of several solder fillets. There was no deformation or cracking in the solder located in the gap between the package I/O and the circuit board pad nor in the interior of the fillets, both locations that would raise concerns of joint mechanical integrity. A drop in the chip capacitor shear strength was attributed to crack growth near the top of the fillet.

  18. Impacts of increased bioenergy demand on global food markets: an AgMIP economic model intercomparison

    SciTech Connect

    Lotze-Campen, Hermann; von Lampe, Martin; Kyle, G. Page; Fujimori, Shinichiro; Havlik, Petr; van Meijl, Hans; Hasegawa, Tomoko; Popp, Alexander; Schmitz, Christoph; Tabeau, Andrzej; Valin, Hugo; Willenbockel, Dirk; Wise, Marshall A.

    2014-01-01

    Integrated Assessment studies have shown that meeting ambitious greenhouse gas mitigation targets will require substantial amounts of bioenergy as part of the future energy mix. In the course of the Agricultural Model Comparison and Improvement Project (AgMIP), five global agro-economic models were used to analyze a future scenario with global demand for ligno-cellulosic bioenergy rising to about 100 ExaJoule in 2050. From this exercise a tentative conclusion can be drawn that ambitious climate change mitigation need not drive up global food prices much, if the extra land required for bioenergy production is accessible or if the feedstock, e.g. from forests, does not directly compete for agricultural land. Agricultural price effects across models by the year 2050 from high bioenergy demand in an RCP2.6-type scenario appear to be much smaller (+5% average across models) than from direct climate impacts on crop yields in an RCP8.5-type scenario (+25% average across models). However, potential future scarcities of water and nutrients, policy-induced restrictions on agricultural land expansion, as well as potential welfare losses have not been specifically looked at in this exercise.

  19. Knowledge for Practice: A Training Program for College Access Advisors

    ERIC Educational Resources Information Center

    Tracy, Elizabeth M.; Freimark, Susan; Boss, Maria Isabel; Lonergan, Patricia

    2005-01-01

    Social and environmental factors, unique to many first-generation college students and other at-risk youth, complicate the job of college advising. This study provides program design, and teaching topics and techniques to further sensitize advisors to social, emotional, and cultural factors that impact their work.

  20. Database Advisor: A New Tool for K-12 Research Projects.

    ERIC Educational Resources Information Center

    Berteaux, Susan S.; Strong, Sandra S.

    The Database Advisor (DBA) is a tool designed to guide users to the most appropriate World Wide Web-based databases for their research. Developed in 1997 by the Science Libraries at the University of California, San Diego (UCSD), DBA is a Web-based front-end to bibliographic and full-text databases to which UCSD has remote access. DBA allows the…

  1. Increasing Advisor Effectiveness by Understanding Conflict and Conflict Resolution

    ERIC Educational Resources Information Center

    McClellan, Jeffrey

    2005-01-01

    On a daily basis, advisors encounter various types of interpersonal and intrapersonal conflict. Through this article, the reader will better understand conflict, its positive and negative impacts and the approaches of the actors experiencing conflict, and the means whereby conflicts arise, escalate, and come to resolution in advising situations.…

  2. The Advising Connection: A Training Program for Faculty Advisors.

    ERIC Educational Resources Information Center

    Clifton, Cherie; Long, Carolyne

    At Amarillo College (AC) in Texas, academic advising is provided by certified counselors at the Advising and Counseling Center in conjunction with faculty and staff of the developmental studies department. In addition, all teaching faculty serve as student advisors. During the past 5 years, a number of factors have placed increased demands on the…

  3. Role Change (From Teacher to Teacher/Advisor).

    ERIC Educational Resources Information Center

    Aiken, James B.

    Cognitive and operational difficulties that may ensue from the modification of teacher role into teacher/advisor role can be alleviated by the adoption of four sequential processes. Teachers and administrators involved in role change must pass through the stages of: (1) modifying the old role to include the new; (2) identifying with the new role…

  4. Full Range Advising: Transforming the Advisor-Advisee Experience

    ERIC Educational Resources Information Center

    Barbuto, John E., Jr.; Story, Joana S.; Fritz, Susan M.; Schinstock, Jack L.

    2011-01-01

    Drawing from the leadership literature, a new model for advising is proposed. Full range advising encompasses laissez-faire, management by exception, contingent rewards, and transformational behaviors. The relationships between full range advising and advisees' extra effort, satisfaction with the advisor, and advising effectiveness were examined.…

  5. New Routes To Transfer. The Advisor. November 2001

    ERIC Educational Resources Information Center

    British Columbia Council on Admissions and Transfer, 2001

    2001-01-01

    The Advisor provides important information or "system alerts," in user-friendly format and language, on issues and changes affecting admissions and transfer. This document outlines new transfer possibilities in academic arts and science programs, and business diploma programs -- the two largest programs offered by the colleges, university colleges…

  6. Advisors' Perceptions of Community College Advising

    ERIC Educational Resources Information Center

    Solis, Linda Yolanda

    2012-01-01

    The purpose of the following dissertation was to gain understanding of community college advisors' perceptions of the community college advising process. A constructivist approach was utilized to develop a general description and understanding of what influences advising perceptions from qualitative data collected through interviews with…

  7. Trends in Defamation Law: Let the Advisor Beware.

    ERIC Educational Resources Information Center

    King, Robert D.

    1992-01-01

    Although most lawsuits brought by students against a college are grounded on contract and due process theories, courts have been willing to consider students' defamation suits using tort theories. Recent changes in defamation law have engendered increased litigation and risk of liability for faculty and advisors. (Author/MSE)

  8. Student Preferences for Academic Advisors as Transformational Leaders

    ERIC Educational Resources Information Center

    Drozd, Deborah Suzanne

    2010-01-01

    A quantitative study was conducted to determine the preferences of undergraduate students for academic advisors as transformational leaders. A questionnaire was developed and distributed to undergraduate students enrolled in leadership classes at a major land grant university to determine importance ratings based on the variables including…

  9. Training Mentors as Educational Advisors for Adult Learners. Process Manual.

    ERIC Educational Resources Information Center

    Singer, Elizabeth W.

    Materials used by the director of a project designed to assist key personnel in businesses, industries, and agencies with the educational counseling of their employees are presented. The objectives of the project, "Training Mentors as Educational Advisors of Adult Learners," were to: (1) provide two training sessions in educational counseling…

  10. Shifting Roles: From Language Teachers to Learning Advisors

    ERIC Educational Resources Information Center

    Morrison, Brian R.; Navarro, Diego

    2012-01-01

    Although learning advisors are often qualified teachers, the skills they apply, such as those discussed by Kelly (1996), require a significant shift in approach regarding interaction with students. As teachers reorient themselves to advising, their role changes quite markedly from teaching language to advising on learning (Mozzon-McPherson, 2001).…

  11. 76 FR 80733 - Extension of Temporary Registration of Municipal Advisors

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-27

    .... \\6\\ See Securities Exchange Act Release No. 62824, 75 FR 54465 (September 8, 2010) (``Interim Release.... 63576; 76 FR 824 (January 6, 2011) (``Proposing Release''). \\8\\ See 17 CFR 240.15Ba2-6T(e). \\9\\ See 17... COMMISSION 17 CFR Part 240 RIN 3235-AK69 Extension of Temporary Registration of Municipal Advisors...

  12. Synthesis, kinetics and photocatalytic study of "ultra-small" Ag-NPs obtained by a green chemistry method using an extract of Rosa 'Andeli' double delight petals.

    PubMed

    Suárez-Cerda, Javier; Alonso-Nuñez, Gabriel; Espinoza-Gómez, Heriberto; Flores-López, Lucía Z

    2015-11-15

    This paper reports the effect of different concentrations of Rosa 'Andeli' double delight petals aqueous extract (PERA) in the synthesis of silver nanoparticles (Ag-NPs), using an easy green chemistry method. Its kinetics study and photocatalytic activity were also evaluated. The Ag-NPs were obtained using an aqueous silver nitrate solution (AgNO3) with 9.66% w/v, 7.25% w/v, and 4.20% w/v PERA as both reducing-stabilizing agent. The formation of the Ag-NPs was demonstrated by analysis of UV-vis spectroscopy, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and transmission electron microscopy (TEM). TEM analysis shows spherical nanoparticles in shape and size between ∼0.5 and 1.4nm. A comparative study was done to determine which concentration was the best reducing-stabilizing agent, and we found out that "ultra-small" nanoparticles (0.5-1.1nm) were obtained with 9.66% w/v of PERA. The size of the Ag-NPs depends on the concentration of PERA and Ag(I). The reaction of formation of "ultra-small" Ag-NPs, proved to be first order for metallic precursor (silver) and second order for reducing-stabilizing agent (PERA). The Ag-NPs showed photocatalytic activity, in degradation of commercial dye with an efficiency of 95%. PMID:26218196

  13. Dynamic selection of models for a ventilator-management advisor.

    PubMed Central

    Rutledge, G. W.

    1993-01-01

    A ventilator-management advisor (VMA) is a computer program that monitors patients who are treated with a mechanical ventilator. A VMA implements a patient-specific physiologic model to interpret patient data and to predict the effects of alternative control settings for the ventilator. Because a VMA evaluates its physiologic model repeatedly during each cycle of data interpretation, highly complex models may require more computation time than is available in this time-critical application. On the other hand, less complex models may be inaccurate if they are unable to represent a patient's physiologic abnormalities. For each patient, a VMA should select a model that balances the tradeoff of prediction accuracy and computation-time complexity. I present a method to select models that are at an appropriate level of detail for time-constrained decision tasks. The method is based on a local search in a graph of models (GoM) for a model that maximizes the tradeoff of computation-time complexity and prediction accuracy. For each model under consideration, a belief network computes a probability of model adequacy given the qualitative prior information, and the goodness of fit of the model to the data provides a measure of the conditional probability of adequacy given the quantitative observations. I apply this method to the problem of model selection for a VMA. I describe an implementation of a graph of physiologic models that range in complexity from VentPlan, a simple model with 3 compartments, to VentSim, a multicompartment model with detailed airway, circulation and mechanical ventilator components.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:8130492

  14. Tangled in a Complex Web of Relationships: Athletic/Academic Advisors Negotiating Privacy Disclosure Warnings with College Student-Athletes

    ERIC Educational Resources Information Center

    Thompson, Jason

    2013-01-01

    To investigate privacy management in the relationship between athletic/academic advisors and college student-athletes, I interviewed 37 advisors to address the following questions: What type of privacy rules do student-athletes communicate to advisors? How do advisors manage student-athletes' private information following these rules?…

  15. Colorimetric Detection of an Airborne Remote Photocatalytic Reaction Using a Stratified Ag Nanoparticle Sheet.

    PubMed

    Degawa, Ryo; Wang, Pangpang; Tanaka, Daisuke; Park, Susie; Sakai, Nobuyuki; Tatsuma, Tetsu; Okamoto, Koichi; Tamada, Kaoru

    2016-08-16

    Photocatalysts are practically used for decomposition of harmful and fouling organic compounds. Among the photocatalytic reactions, remote oxidation via airborne species is a relatively slow process, so that a sensitive technique for its detection has been awaiting. Here, we investigated an airborne remote photocatalytic reaction of a TiO2 photocatalyst modified with Pt nanoparticles as co-catalysts via the color change caused by a decomposition of a multilayered silver nanoparticle sheet. The silver nanoparticle sheet fabricated by the Langmuir-Schaefer method on a gold substrate exhibits a unique multicolor depending upon the number of layers. The color originates from multiple light trapping in the stratified sheets that has a metamaterial characteristic along with an intra- and interlayer coupling of localized surface plasmon resonance (LSPR). The stepwise decomposition of the sheets was confirmed by the colorimetric data, which exhibited not only a monotonic decrease but also a maximized absorption of light when the film thickness reached the optimal thickness for light trapping or when the oxidation of the Ag core started. Scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and surface plasmon resonance (SPR) spectroscopy data provided a complete view of the decomposition process of this inorganic-organic nanocomposite film, and simulation by the transfer-matrix method explained a simultaneous plasmonic response rationally. The influence of the humidity and gas flow rate on the airborne remote photocatalytic reaction kinetics was examined by this colorimetric detection method, and it suggests that H2O in air plays an essential role in the reaction. PMID:27445001

  16. An excitatory paraventricular nucleus to AgRP neuron circuit that drives hunger.

    PubMed

    Krashes, Michael J; Shah, Bhavik P; Madara, Joseph C; Olson, David P; Strochlic, David E; Garfield, Alastair S; Vong, Linh; Pei, Hongjuan; Watabe-Uchida, Mitsuko; Uchida, Naoshige; Liberles, Stephen D; Lowell, Bradford B

    2014-03-13

    Hunger is a hard-wired motivational state essential for survival. Agouti-related peptide (AgRP)-expressing neurons in the arcuate nucleus (ARC) at the base of the hypothalamus are crucial to the control of hunger. They are activated by caloric deficiency and, when naturally or artificially stimulated, they potently induce intense hunger and subsequent food intake. Consistent with their obligatory role in regulating appetite, genetic ablation or chemogenetic inhibition of AgRP neurons decreases feeding. Excitatory input to AgRP neurons is important in caloric-deficiency-induced activation, and is notable for its remarkable degree of caloric-state-dependent synaptic plasticity. Despite the important role of excitatory input, its source(s) has been unknown. Here, through the use of Cre-recombinase-enabled, cell-specific neuron mapping techniques in mice, we have discovered strong excitatory drive that, unexpectedly, emanates from the hypothalamic paraventricular nucleus, specifically from subsets of neurons expressing thyrotropin-releasing hormone (TRH) and pituitary adenylate cyclase-activating polypeptide (PACAP, also known as ADCYAP1). Chemogenetic stimulation of these afferent neurons in sated mice markedly activates AgRP neurons and induces intense feeding. Conversely, acute inhibition in mice with caloric-deficiency-induced hunger decreases feeding. Discovery of these afferent neurons capable of triggering hunger advances understanding of how this intense motivational state is regulated. PMID:24487620

  17. Formation of core-shell Au@Ag nanorods induced by catecholamines: A comparative study and an analytical application.

    PubMed

    Gorbunova, M V; Apyari, V V; Dmitrienko, S G; Garshev, A V

    2016-09-14

    Gold nanorods (AuNRs) stabilized by cetyltrimethylammonium bromide (CTAB) were synthesized and an interaction of catecholamines (CAs) with silver ions in the presence of the obtained AuNRs was studied. The reaction results into formation of core-shell Au@Ag nanorods (Au@AgNRs) and leads to a hypsochromic shift of the long-wave surface plasmon resonance (SPR) band in the absorption spectrum of AuNRs. The influence of a CA structure, excess of CTAB, interaction time, pH, concentration of AuNRs, silver ions and CAs on this interaction was studied. Based on correlation of the NRs spectral characteristics with the concentration of CAs, a method for spectrophotometric determination of dobutamine, epinephrine, norepinephrine and dopamine with detection limits 27, 18, 16 and 13 μg L(-1), respectively, has been developed. The method can be applied to the analysis of medicines. PMID:27566354

  18. Investigation of the surface passivation mechanism through an Ag-doped Al-rich film using a solution process.

    PubMed

    Khan, Firoz; Baek, Seong-Ho; Kim, Jae Hyun

    2016-01-14

    Electronic recombination loss is an important issue for photovoltaic (PV) devices. While it can be reduced by using a passivating layer, most of the techniques used to prepare passivating layers are either not cost effective or not applicable for device applications. Previously, it was reported that a low cost sol-gel derived Al-rich zinc oxide (ZnO:Al) film serves as an effective passivating layer for p-type silicon but is not effective for n-type silicon. Herein, we studied the elemental composition of the film and the interfacial structure of ZnO:Al:Ag/n-Si using TEM, XPS, FTIR, and SIMS analyses. The XPS analysis revealed that Ag-rich zones randomly formed in the film near the ZnO:Al:Ag//n-Si interface, which induced a positive charge at the interface. The maximal value of the effective minority carrier lifetime (τeff ≈ 1581 μs) is obtained for a wafer using the ZnO:Al:Ag passivating layer with RAg/Zn = 2%. The corresponding limiting surface recombination velocity is ∼16 cm s(-1). The FTIR absorption area of Si-H bonds is used to calculate the hydrogen content in the film. The hydrogen content is increased with increasing Ag content up to RAg/Zn = 2% to a maximal value of 3.89 × 10(22) atoms per cm(3) from 3.03 × 10(22) atoms per cm(3) for RAg/Zn = 0%. The positive charge induced at the interface may cause band bending, which would produce an electric field that repels the minority charge carriers from the interface to the bulk of n-Si. Two basic phenomena, chemical passivation due to Si-H bonding and field effect passivation due to the charge induced at the interface, have been observed for effective passivation of the n-Si surface. An implied Voc of 688.1 mV is obtained at an illumination intensity of 1 sun. PMID:26661502

  19. Air-Traffic Controllers Evaluate The Descent Advisor

    NASA Technical Reports Server (NTRS)

    Tobias, Leonard; Volckers, Uwe; Erzberger, Heinz

    1992-01-01

    Report describes study of Descent Advisor algorithm: software automation aid intended to assist air-traffic controllers in spacing traffic and meeting specified times or arrival. Based partly on mathematical models of weather conditions and performances of aircraft, it generates suggested clearances, including top-of-descent points and speed-profile data to attain objectives. Study focused on operational characteristics with specific attention to how it can be used for prediction, spacing, and metering.

  20. NREL's System Advisor Model Simplifies Complex Energy Analysis (Fact Sheet)

    SciTech Connect

    Not Available

    2015-01-01

    NREL has developed a tool -- the System Advisor Model (SAM) -- that can help decision makers analyze cost, performance, and financing of any size grid-connected solar, wind, or geothermal power project. Manufacturers, engineering and consulting firms, research and development firms, utilities, developers, venture capital firms, and international organizations use SAM for end-to-end analysis that helps determine whether and how to make investments in renewable energy projects.

  1. HBsAg loss is not an ideal indicator for discontinuing treatment of HBeAg-negative chronic hepatitis B: a case report.

    PubMed

    Dong, Pei-Ling; Zhang, Xin; Zhao, Wen-Min; Ding, Hui-Guo

    2013-12-01

    We experienced a case of a 36-year-old married man who was found to be hepatitis B virus (HBV) positive at 23 years of age. His liver function was repeatedly abnormal in the past 13 years. In November 2007 he presented with fatigue. Laboratory tests showed serum alanine aminotransferase concentration 255.3 U/l, positive for hepatitis B surface antigen (HBsAg) and hepatitis B e antibody, HBV DNA 3.01 × 10(7) copies/ml; liver biopsy showed necroinflammatory scores 11 and fibrosis scores 4. After 20 weeks of treatment with Peg-IFN α-2b, laboratory tests showed HBV DNA <500 copies/ml and normal liver function. By week 52 of the treatment, HBsAg became negative. By week 92 of continuing treatment, HBsAb became weakly positive and Peg-IFN α-2b treatment was stopped. On follow-up, both HBsAg and HBsAb were negative 28 weeks after discontinuation of Peg-IFN α-2b. We then performed a second liver biopsy and histological examination revealed necroinflammtary scores 2 and fibrosis scores 2. We administered hepatitis B vaccine intramuscularly every 4 weeks combined with IFN α-1b 30 μg intramuscularly every other day. HBsAb was 244.8 IU/l at week 32 of this combined treatment. Follow-up showed that after discontinuation of the combined treatment HBsAb concentration declined rapidly but could be maintained above 100 IU/l by intermittent injections of hepatitis B vaccine. Findings from this case reveal that HBsAg loss may be not sufficient; however, HBsAg seroconversion together with maintenance of certain concentrations of HBsAb may be a better endpoint to HBV treatment. PMID:23783395

  2. High Temperature Long-Term Stability of an (Al-Ag-Cu) Three-in-One Multicell

    NASA Astrophysics Data System (ADS)

    Kim, Yong-Gyoo; Yang, Inseok; Joung, Wukchul

    2016-01-01

    In order to investigate the long-term stability of an (Al-Ag-Cu) three-in-one multicell, it was heat-treated at 1100° C, in which all metal samples were in molten state, for 1000 h. Its thermal behavior was tested using a Pt/Pd thermocouple by inducing freezes during the heat treatment. The amount by which the plateau temperature dropped after the 1000 h heat treatment were 1.62° C, 2.07° C, and 0.66° C for Al, Ag, and Cu, respectively. These degradations were suspected to be caused by self-contaminations, and to prove this, impurity concentrations in each sample of the multicell were examined. The amount of temperature dropped after the 1000 h heat treatment showed similar values to the prediction based on the impurity-induced temperature changes, and it was concluded that each cell was self-contaminated by the metallic elements from the other cells. Ag and Cu were found to be main species causing the observed degradations.

  3. NO{sub X} advisor: Intelligent software for combustion optimization

    SciTech Connect

    Pfahler, J.; Eskenazi, D; Levy, E.

    1996-01-01

    Under a Tailored Collaboration Project funded by PEPCO and EPRI, Lehigh University`s Energy Research Center has been developing software for use by plant personnel to optimize a pulverized coal-fired boiler to reduce NO{sub x} emissions and minimize heat rate. Based on expert systems, neural networks and a mathematical optimization algorithm, the NO{sub x} Advisor uses the expert system to safely guide the plant engineer through a series of parametric boiler tests, gathering a database to characterize the operation of the boiler over a wide range of conditions. The neural network develops non-linear mappings between NO{sub x} heat rate and the controllable parameters. These are then used by the mathematical optimization algorithm to identify optimal operating conditions. The Advisor can be used to adjust a boiler to reach minimum NO{sub x} or identify the conditions that give minimum heat rate subject to a target NO{sub x} value. The Advisor operates off-line on a PC platform, gathering data automatically from the plant data highway and/or manually as needed. Results of a field trial at PEPCO`s Potomac River Station are described.

  4. Irreversibility line of an Ag-doped Hg-based superconductor

    NASA Astrophysics Data System (ADS)

    Mostafa, M. F.; Hassen, A.; Kunkel, H. P.

    2010-08-01

    The effect of doping with Ag of the bulk superconducting Hg0.3La0.7Ba2Ca3(Cu1 - xAgx)4O10 + δ, 0.1 <= x <= 0.3 phase (Hg-1234) is presented. The lattice parameter a = 3.824 Å remains constant, while parameter c was found to increase from c = 19.0225 Å (x = 0.0) to 19.08 Å (x = 0.3) with the addition of Ag. The variation of Tc versus the c-parameter exhibits a cupola-shaped behavior. The irreversibility line is thermally activated. The logarithmic plot of Hirr versus (1 - Tirr/Tc(0)) shows a crossover temperature reflecting a transition from two- to three-dimensional behavior with increasing temperature. Fitting of the results to different models is discussed. Thermally activated de-pinning according to Matsushita's formula gives the best fit.

  5. Student goal orientation in learning inquiry skills with modifiable software advisors

    NASA Astrophysics Data System (ADS)

    Shimoda, Todd A.; White, Barbara Y.; Frederiksen, John R.

    2002-03-01

    A computer support environment (SCI-WISE) for learning and doing science inquiry projects was designed. SCI-WISE incorporates software advisors that give general advice about a skill such as hypothesizing. By giving general advice (rather than step-by-step procedures), the system is intended to help students conduct experiments that are more epistemologically authentic. Also, students using SCI-WISE can select the type of advice the advisors give and when they give advice, as well as modify the advisors' knowledge bases. The system is based partly on a theoretical framework of levels of agency and goal orientation. This framework assumes that giving students higher levels of agency facilitates higher-level goal orientations (such as mastery or knowledge building as opposed to task completion) that in turn produce higher levels of competence. A study of sixth grade science students was conducted. Students took a pretest questionnaire that measured their goal orientations for science projects and their inquiry skills. The students worked in pairs on an open-ended inquiry project that requires complex reasoning about human memory. The students used one of two versions of SCI-WISE - one that was modifiable and one that was not. After finishing the project, the students took a posttest questionnaire similar to the pretest, and evaluated the version of the system they used. The main results showed that (a) there was no correlation of goal orientation with grade point average, (b) knowledge-oriented students using the modifiable version tended to rate SCI-WISE more helpful than task-oriented students, and (c) knowledge-oriented pairs using the nonmodifiable version tended to have higher posttest inquiry skills scores than other pair types.

  6. Ag(I)-catalyzed tandem [6+3] annulation/isomerization of isocyanoacetates with fulvenes: an expedient approach to synthesize fused dihydropyridines.

    PubMed

    He, Zhao-Lin; Wang, Chun-Jiang

    2015-01-11

    An unprecedented Ag(i)-catalyzed tandem [6+3] cycloaddition/isomerization of isocyanoacetates with fulvenes has been developed, affording the fused dihydropyridine derivatives in good yields with exclusive regioselectivities. PMID:25412446

  7. Contribution to the description of the absorber rod behavior in severe accident conditions: An experimental investigation of the Ag-Zr phase diagram

    NASA Astrophysics Data System (ADS)

    Decreton, A.; Benigni, P.; Rogez, J.; Mikaelian, G.; Barrachin, M.; Lomello-Tafin, M.; Antion, C.; Janghorban, A.; Fischer, E.

    2015-10-01

    Most pressurized water reactor (PWR) absorber rods are composed of an Ag-In-Cd (SIC) alloy inside a stainless steel (SS) cladding, themselves inserted into a Zircaloy tube. During a severe accident, the SIC alloy which melts at 800 °C does not practically interact with SS. However, the cladding failure results from its internal pressurization and its eutectic interaction with Zircaloy and occurs at temperatures greater than 1200 °C. The subsequent interaction between the SIC melt and the Zircaloy has a strong impact on the quantities of aerosols released into the primary circuit and finally on the iodine chemistry. Accurate knowledge of the Ag-Zr system is a prerequisite to address this issue. Within this concern, our experimental work is focused both on the investigation of the Ag-Zr phase diagram and on the determination of the thermodynamic properties of the intermetallic compounds in the system. Two intermetallic compounds (AgZr and AgZr2) were identified. Ag-Zr cast alloys with a Ag/Zr ratio of 1:1 elaborated using an arc-melting furnace, once annealed, contained only a single phase AgZr. From metallographic observations, it appears that AgZr2 likely forms by the peritectic reaction from liquid and the bcc (βZr) phase. The partial enthalpies of solution of silver and zirconium in aluminum were experimentally determined at 723 °C in order to determine the enthalpies of formation of the intermetallic compounds. For silver solution calorimetry in aluminum bath, our measurements were successful and in agreement with the previous data. Yet, this study shows that liquid aluminum should not be used as a solvent for zirconium below 1000 °C.

  8. Pharmacokinetics of hederacoside C, an active ingredient in AG NPP709, in rats.

    PubMed

    Kim, Ju Myung; Yoon, Ji Na; Jung, Ji Won; Choi, Hye Duck; Shin, Young June; Han, Chang Kyun; Lee, Hye Suk; Kang, Hee Eun

    2013-11-01

    1. Hederacoside C (HDC) is one of the active ingredients in Hedera helix leaf extract (Ivy Ex.) and AG NPP709, a new botanical drug to treat acute respiratory infection and chronic inflammatory bronchitis. However, information regarding its pharmacokinetic properties remains limited. 2. Here, we report the pharmacokinetics of HDC in rats after intravenous administration of HDC (3, 12.5, and 25 mg/kg) and after oral administration of HDC, Ivy Ex., and AG NPP709 (equivalent to 12.5, 25, and 50 mg/kg HDC). 3. Linear pharmacokinetics of HDC were identified upon its intravenous administration at doses of 3-25 mg/kg. Intravenous administration of HDC results in relatively slow clearance (1.46-2.08 mL/min/kg) and a small volume of distribution at steady state (138-222 mL/kg), while oral administration results in a low absolute oral bioavailability (F) of 0.118-0.250%. The extremely low F of HDC may be due to poor absorption of HDC from the gastrointestinal (GI) tract and/or its decomposition therein. 4. The oral pharmacokinetics of HDC did not differ significantly among pure HDC, Ivy Ex., and AG NPP709. PMID:23607546

  9. Oxidation of ethyl acetate by a high performance nanostructure (Ni, Mn)-Ag/ZSM-5 bimetallic catalysts and development of an artificial neural networks predictive modeling.

    PubMed

    Jodaei, Azadeh; Salari, Darush; Niaei, Ali; Khatamian, Masumeh; Hosseini, Seyed Ali

    2011-01-01

    The catalytic oxidation of ethyl acetate in low concentration was investigated over mono-metallic Ag/ZSM5 and bimetallic (Ni, Mn)-Ag/ZSM-5 catalysts. Catalytic studies were carried out in a catalytic fixed bed reactor under atmospheric pressure. The sequence of catalytic activity was as follows: Ni-Ag-ZSM-5 > Mn-Ag-ZSM-5 > Ag-ZSM-5 > H-ZSM-5. The catalysts were characterized by ICP-AES, X-ray diffraction (XRD), low temperature nitrogen adsorption, NH(3)-TPD, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and diffuse reflectance UV-vis spectra (UV-vis). An artificial neural networks (ANN) model was developed to predict the performance of catalytic oxidation process over bimetallic Ni-Ag/ZSM-5 catalyst based on experimental data. For this purpose the standard feed forward back propagation algorithm was employed to train the model by using laboratory experimental data. A good agreement was resulted between experimental results and those obtained by ANN. Following order for variables effects on conversion yield of ethyl acetate was predicted by ANN model: reaction temperature (32.99%) > Ag loading (27.38%) > initial ethyl acetate concentration (23.58%) > Ni loading (16.05%). PMID:21104495

  10. Effect of Ag Templates on the Formation of Au-Ag Hollow/Core-Shell Nanostructures

    NASA Astrophysics Data System (ADS)

    Tsai, Chi-Hang; Chen, Shih-Yun; Song, Jenn-Ming; Haruta, Mitsutaka; Kurata, Hiroki

    2015-11-01

    Au-Ag alloy nanostructures with various shapes were synthesized using a successive reduction method in this study. By means of galvanic replacement, twined Ag nanoparticles (NPs) and single-crystalline Ag nanowires (NWs) were adopted as templates, respectively, and alloyed with the same amount of Au+ ions. High angle annular dark field-scanning TEM (HAADF-STEM) images observed from different rotation angles confirm that Ag NPs turned into AuAg alloy rings with an Au/Ag ratio of 1. The shifts of surface plasmon resonance and chemical composition reveal the evolution of the alloy ring formation. On the other hand, single-crystalline Ag NWs became Ag@AuAg core-shell wires instead of hollow nanostructure through a process of galvanic replacement. It is proposed that in addition to the ratio of Ag templates and Au ion additives, the twin boundaries of the Ag templates were the dominating factor causing hollow alloy nanostructures.

  11. Effect of Ag Templates on the Formation of Au-Ag Hollow/Core-Shell Nanostructures.

    PubMed

    Tsai, Chi-Hang; Chen, Shih-Yun; Song, Jenn-Ming; Haruta, Mitsutaka; Kurata, Hiroki

    2015-12-01

    Au-Ag alloy nanostructures with various shapes were synthesized using a successive reduction method in this study. By means of galvanic replacement, twined Ag nanoparticles (NPs) and single-crystalline Ag nanowires (NWs) were adopted as templates, respectively, and alloyed with the same amount of Au(+) ions. High angle annular dark field-scanning TEM (HAADF-STEM) images observed from different rotation angles confirm that Ag NPs turned into AuAg alloy rings with an Au/Ag ratio of 1. The shifts of surface plasmon resonance and chemical composition reveal the evolution of the alloy ring formation. On the other hand, single-crystalline Ag NWs became Ag@AuAg core-shell wires instead of hollow nanostructure through a process of galvanic replacement. It is proposed that in addition to the ratio of Ag templates and Au ion additives, the twin boundaries of the Ag templates were the dominating factor causing hollow alloy nanostructures. PMID:26563266

  12. Development of StopAdvisor: A theory-based interactive internet-based smoking cessation intervention.

    PubMed

    Michie, Susan; Brown, Jamie; Geraghty, Adam W A; Miller, Sascha; Yardley, Lucy; Gardner, Benjamin; Shahab, Lion; McEwen, Andy; Stapleton, John A; West, Robert

    2012-09-01

    Reviews of internet-based behaviour-change interventions have shown that they can be effective but there is considerable heterogeneity and effect sizes are generally small. In order to advance science and technology in this area, it is essential to be able to build on principles and evidence of behaviour change in an incremental manner. We report the development of an interactive smoking cessation website, StopAdvisor, designed to be attractive and effective across the social spectrum. It was informed by a broad motivational theory (PRIME), empirical evidence, web-design expertise, and user-testing. The intervention was developed using an open-source web-development platform, 'LifeGuide', designed to facilitate optimisation and collaboration. We identified 19 theoretical propositions, 33 evidence- or theory-based behaviour change techniques, 26 web-design principles and nine principles from user-testing. These were synthesised to create the website, 'StopAdvisor' (see http://www.lifeguideonline.org/player/play/stopadvisordemonstration). The systematic and transparent application of theory, evidence, web-design expertise and user-testing within an open-source development platform can provide a basis for multi-phase optimisation contributing to an 'incremental technology' of behaviour change. PMID:24073123

  13. Investigation of the surface passivation mechanism through an Ag-doped Al-rich film using a solution process

    NASA Astrophysics Data System (ADS)

    Khan, Firoz; Baek, Seong-Ho; Kim, Jae Hyun

    2015-12-01

    Electronic recombination loss is an important issue for photovoltaic (PV) devices. While it can be reduced by using a passivating layer, most of the techniques used to prepare passivating layers are either not cost effective or not applicable for device applications. Previously, it was reported that a low cost sol-gel derived Al-rich zinc oxide (ZnO:Al) film serves as an effective passivating layer for p-type silicon but is not effective for n-type silicon. Herein, we studied the elemental composition of the film and the interfacial structure of ZnO:Al:Ag/n-Si using TEM, XPS, FTIR, and SIMS analyses. The XPS analysis revealed that Ag-rich zones randomly formed in the film near the ZnO:Al:Ag//n-Si interface, which induced a positive charge at the interface. The maximal value of the effective minority carrier lifetime (τeff ~ 1581 μs) is obtained for a wafer using the ZnO:Al:Ag passivating layer with RAg/Zn = 2%. The corresponding limiting surface recombination velocity is ~16 cm s-1. The FTIR absorption area of Si-H bonds is used to calculate the hydrogen content in the film. The hydrogen content is increased with increasing Ag content up to RAg/Zn = 2% to a maximal value of 3.89 × 1022 atoms per cm3 from 3.03 × 1022 atoms per cm3 for RAg/Zn = 0%. The positive charge induced at the interface may cause band bending, which would produce an electric field that repels the minority charge carriers from the interface to the bulk of n-Si. Two basic phenomena, chemical passivation due to Si-H bonding and field effect passivation due to the charge induced at the interface, have been observed for effective passivation of the n-Si surface. An implied Voc of 688.1 mV is obtained at an illumination intensity of 1 sun.Electronic recombination loss is an important issue for photovoltaic (PV) devices. While it can be reduced by using a passivating layer, most of the techniques used to prepare passivating layers are either not cost effective or not applicable for device

  14. Peer health advisor program to reduce the health risks of university students.

    PubMed Central

    Carey, M I

    1984-01-01

    Health promoters in the United States need to address the challenge of reducing health risks in young adults. The conditions that lead to the largest percentages of early disabilities and deaths are related to lifestyle characteristics. As health care costs continue spiraling upward, many professionals question the use of solely medical solutions to health problems. Health leaders have called for a change in priorities from curing the sick to keeping people well. Reducing health risks will increase longevity, improve quality of life, and reduce health care costs. It is widely believed that during the adolescent and young adult years many important health habits are formed and set. An individual person's health destiny can, in fact, be greatly shaped by the attitudes, behavior, and knowledge adopted during the early years of independence. For these reasons, wellness and self-care programming for college students is vital and worthy of being rigorously explored and evaluated. In this health promotion proposal, peers deliver a Lifestyle Health Planning Program to university students. They can encourage an internal locus of control over health matters and a perception of choice in those they counsel. The peer advisors conduct one-on-one sessions and outreach programs in the subject areas of fitness, nutrition, health-impairing habits, stress management, and sexuality. Promoting self-responsibility during college years can set lifelong positive health habits. A group of trained peer health advisors can be an innovative device to implement a health promotion program in a university setting. PMID:6440207

  15. An ultrathin, smooth, and low-loss Al-doped Ag film and its application as a transparent electrode in organic photovoltaics.

    PubMed

    Zhang, Cheng; Zhao, Dewei; Gu, Deen; Kim, Hyunsoo; Ling, Tao; Wu, Yi-Kuei Ryan; Guo, L Jay

    2014-08-27

    An ultrathin, smooth, and low-loss Ag film without a wetting layer is achieved by co-depositing a small amount of Al into Ag. The film can be as thin as 6 nm, with a roughness below 1 nm and excellent mechanical flexibility. Organic photovoltaics that use these thin films as transparent electrode show superior efficiency to their indium tin oxide (ITO) counterparts because of improved photon management. PMID:24943876

  16. Baryon distributions in heavy ion collisions at AGS energies: An experimental overview

    SciTech Connect

    Videbaek, F.

    1993-06-01

    Data on rapidity distributions of protons from the three AGS experiments E-814, E-810 and E-802 are compared on a common base to enlarge the rapidity coverage. Together they provide a unique opportunity to study the proton distributions in relativistic heavy ion reactions over the full rapidity range. Systematics of the rapidity density distributions are presented as function of centrality and mass of colliding system. Considerable stopping is achieved for the heaviest system studied, Au+Au, thus giving the means to study high-density effects in nuclear matter.

  17. Baryon distributions in heavy ion collisions at AGS energies: An experimental overview

    SciTech Connect

    Videbaek, F.

    1993-01-01

    Data on rapidity distributions of protons from the three AGS experiments E-814, E-810 and E-802 are compared on a common base to enlarge the rapidity coverage. Together they provide a unique opportunity to study the proton distributions in relativistic heavy ion reactions over the full rapidity range. Systematics of the rapidity density distributions are presented as function of centrality and mass of colliding system. Considerable stopping is achieved for the heaviest system studied, Au+Au, thus giving the means to study high-density effects in nuclear matter.

  18. An AGS experiment to test bunching for the proton driver of the muon collider.

    SciTech Connect

    Norem, J.

    1998-04-27

    The proton driver for the muon collider must produce short pulses of protons in order to facilitate muon cooling and operation with polarized beams. In order to test methods of producing these bunches they have operated the AGS near transition and studied procedures which involved moving the transition energy {gamma} to the beam energy. They were able to produce stable bunches with RMS widths of {sigma} = 2.2-2.7 ns for longitudinal bunch areas of {minus}1.5 V-s, in addition to making measurements of the lowest two orders of the momentum compaction factor.

  19. AgI/Ag{sub 3}PO{sub 4} hybrids with highly efficient visible-light driven photocatalytic activity

    SciTech Connect

    Katsumata, Hideyuki; Hayashi, Takahiro; Taniguchi, Masanao; Suzuki, Tohru; Kaneco, Satoshi

    2015-03-15

    Highlights: • AgI/Ag{sub 3}PO{sub 4} hybrid was prepared via an in situ anion-exchange method. • AgI/Ag{sub 3}PO{sub 4} displays the excellent photocatalytic activity under visible light. • AgI/Ag{sub 3}PO{sub 4} readily transforms to be Ag@AgI/Ag{sub 3}PO{sub 4} system. • h{sup +} and O{sub 2}{sup ·−} play the major role in the AO 7 decolorization over AgI/Ag{sub 3}PO{sub 4}. • The activity enhancement is ascribed to a Z-scheme system composed of Ag{sub 3}PO{sub 4}, Ag and AgI. - Abstract: Highly efficient visible-light-driven AgI/Ag{sub 3}PO{sub 4} hybrid photocatalysts with different mole ratios of AgI were prepared via an in situ anion-exchange method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) technique. Under visible light irradiation (>420 nm), the AgI/Ag{sub 3}PO{sub 4} photocatalysts displayed the higher photocatalytic activity than pure Ag{sub 3}PO{sub 4} and AgI for the decolorization of acid orange 7 (AO 7). Among the hybrid photocatalysts, AgI/Ag{sub 3}PO{sub 4} with 80% of AgI exhibited the highest photocatalytic activity for the decolorization of AO 7. X-ray photoelectron spectroscopy (XPS) results revealed that AgI/Ag{sub 3}PO{sub 4} readily transformed to be Ag@AgI/Ag{sub 3}PO{sub 4} system while the photocatalytic activity of AgI/Ag{sub 3}PO{sub 4} remained after 5 recycling runs. In addition, the quenching effects of different scavengers displayed that the reactive h{sup +} and O{sub 2}{sup ·−} play the major role in the AO 7 decolorization. The photocatalytic activity enhancement of AgI/Ag{sub 3}PO{sub 4} hybrids can be ascribed to the efficient separation of electron–hole pairs through a Z-scheme system composed of Ag{sub 3}PO{sub 4}, Ag and AgI, in which Ag nanoparticles act as the charge separation center.

  20. The challenges of science journalism: The perspectives of scientists, science communication advisors and journalists from New Zealand.

    PubMed

    Ashwell, Douglas James

    2016-04-01

    The news media play an important role in informing the public about scientific and technological developments. Some argue that restructuring and downsizing result in journalists coming under increased pressure to produce copy, leading them to use more public relations material to meet their deadlines. This article explores science journalism in the highly commercialised media market of New Zealand. Using semi-structured interviews with scientists, science communication advisors and journalists, the study finds communication advisors and scientists believe most media outlets, excluding public service media, report science poorly. Furthermore, restructuring and staff cuts have placed the journalists interviewed under increasing pressure. While smaller newspapers appear to be printing press releases verbatim, metropolitan newspaper journalists still exercise control over their use of such material. The results suggest these journalists will continue to resist increasing their use of public relations material for some time to come. PMID:25387869

  1. Career advising in family medicine: a theoretical framework for structuring the medical student/faculty advisor interview

    PubMed Central

    Bradner, Melissa; Crossman, Steven H.; Vanderbilt, Allison A.; Gary, Judy; Munson, Paul

    2013-01-01

    Background There are unique challenges to recruiting students into the specialty of family medicine within academic medical centers. Methods At Virginia Commonwealth University, we developed an advising framework to help students address institutional and personal obstacles to choosing family medicine as a career. Results The role of a faculty advisor is not to direct the student to a career choice but rather to foster a mentor relationship and help the student come to his or her own realizations regarding career choice. The faculty advisor/medical student interview is conceptualized as five discussion topics: self-knowledge, perception, organizational voice, cognitive dissonance, and anticipatory counseling. Conclusion This framework is intended to assist faculty in their efforts to encourage students to consider a career in family medicine. PMID:23948497

  2. Structure and properties during aging of an ultra-high strength Al-Cu-Li-Ag-Mg alloy

    NASA Technical Reports Server (NTRS)

    Gayle, Frank W.; Heubaum, Frank H.; Pickens, Joseph R.

    1990-01-01

    The structure and properties of the strengthening phases formed during aging in an Al-Cu-Li-Ag-Mg alloy (Weldalite 049) were elulcidated, by following the development of the microstructure by means of TEM. The results of observations showed that the Weldalite 049 alloy has a series of unusual and technologically useful combinations of mechanical properties in different aging conditions, such as natural aging without prior cold work to produce high strengths, a reversion temper of lower yield strength and unusually high ductility, a room temperature reaging of the reversion temper eventually leading to the original T4 hardness, and ultrahigh-strength T6 properties.

  3. The nanocrystalline coordination polymer of AMT-Ag for an effective detection of ciprofloxacin hydrochloride in pharmaceutical formulation and biological fluid.

    PubMed

    Tiwari, Madhu; Kumar, Ashish; Shankar, Uma; Prakash, Rajiv

    2016-11-15

    The present report highlights a cost effective and portable AMT-Ag nanocrystalline coordination polymer (NCCP) based electrochemical sensor for an efficient sensing of biologically active drug molecule ciprofloxacin hydrochloride (CFX). The AMT-Ag NCCP, is synthesized using an easily accessible organic ligand 2-amino-5-mercapto-1,3,4-thiadiazole (AMT) with silver nitrate. In the infinite polymer array of AMT-Ag, silver (I) centers are bridged by tecton AMT through the exocyclic thiol and amino linkage. A successful ultra‒trace detection of CFX has been achieved due to the prominent electron channeling through the pores of polymeric nano-crystallites. The efficient charge transfer arises at the interface of electrolyte and AMT-Ag nano-crystals anchored electrode through hydrophobic interaction and π-π electron coupling. The voltammogram reveals the critical redox features of CFX and provides a clear representation about the steps involved in the AMT-Ag assisted oxidation of CFX. This specific signature further applied in the voltammetric assay of CFX in pharmaceutical formulation (eye drops) and biological fluid (urine) by a significantly high sensitivity (0.002µA/µM and 0.007µA/µM) and detection limit (22nM and 60nM) respectively without any interference. Therefore, the developed AMT-Ag NCCP could serve as a highly valuable platform for the fabrication of high-performance electrochemical sensors for the detection of biologically important drug molecules. PMID:27236138

  4. Ordered array of Ag semishells on different diameter monolayer polystyrene colloidal crystals: An ultrasensitive and reproducible SERS substrate

    PubMed Central

    Yi, Zao; Niu, Gao; Luo, Jiangshan; Kang, Xiaoli; Yao, Weitang; Zhang, Weibin; Yi, Yougen; Yi, Yong; Ye, Xin; Duan, Tao; Tang, Yongjian

    2016-01-01

    Ag semishells (AgSS) ordered arrays for surface-enhanced Raman scattering (SERS) spectroscopy have been prepared by depositing Ag film onto polystyrene colloidal particle (PSCP) monolayer templates array. The diversified activity for SERS activity with the ordered AgSS arrays mainly depends on the PSCP diameter and Ag film thickness. The high SERS sensitivity and reproducibility are proved by the detection of rhodamine 6G (R6G) and 4-aminothiophenol (4-ATP) molecules. The prominent enhancements of SERS are mainly from the “V”-shaped or “U”-shaped nanogaps on AgSS, which are experimentally and theoretically investigated. The higher SERS activity, stability and reproducibility make the ordered AgSS a promising choice for practical SERS low concentration detection applications. PMID:27586562

  5. Ordered array of Ag semishells on different diameter monolayer polystyrene colloidal crystals: An ultrasensitive and reproducible SERS substrate.

    PubMed

    Yi, Zao; Niu, Gao; Luo, Jiangshan; Kang, Xiaoli; Yao, Weitang; Zhang, Weibin; Yi, Yougen; Yi, Yong; Ye, Xin; Duan, Tao; Tang, Yongjian

    2016-01-01

    Ag semishells (AgSS) ordered arrays for surface-enhanced Raman scattering (SERS) spectroscopy have been prepared by depositing Ag film onto polystyrene colloidal particle (PSCP) monolayer templates array. The diversified activity for SERS activity with the ordered AgSS arrays mainly depends on the PSCP diameter and Ag film thickness. The high SERS sensitivity and reproducibility are proved by the detection of rhodamine 6G (R6G) and 4-aminothiophenol (4-ATP) molecules. The prominent enhancements of SERS are mainly from the "V"-shaped or "U"-shaped nanogaps on AgSS, which are experimentally and theoretically investigated. The higher SERS activity, stability and reproducibility make the ordered AgSS a promising choice for practical SERS low concentration detection applications. PMID:27586562

  6. Half sandwich structures of MCF6- (M = Ag and Au): An experimental and theoretical study

    NASA Astrophysics Data System (ADS)

    Sun, Zhang; Tang, Zichao; Gao, Zhen

    2013-01-01

    The metal-hexafluorobenzene anionic complexes of [MC6F6]- (M = Ag and Au) were produced from the reactions between metal cluster generated by laser ablation and the hexafluorobenzene seeded in argon carrier gas, and were studied by photoelectron spectroscopy (PES) and density functional theory (DFT). The adiabatic electron affinities (EAs) of these corresponding complexes are measured from the experimental PE spectra at 193 nm photon energy. Also, the calculated EAs and the calculated density of states (DOS) spectra of these complexes in the ground state are conducted, which are in good agreement with their experimental PE spectra. The most possible structures of the anions [AgC6F6]- and [AuC6F6]- are the half-sandwich structures with C6v symmetry, in which the metal atom is above the center of the C6F6 plane. Furthermore, the molecular orbital (MO) analysis of these species indicates that the additional electron of the anions binds on the metal.

  7. Porosity advisor - expert system used as aid in interpreting origin of porosity in carbonate rocks

    SciTech Connect

    Watney, W.L.; Anderson, J.; Wong, J.

    1989-03-01

    Porosity Advisor was developed to assist in interpreting the origin of porosity in carbonate rocks and to evaluate inexpensive rule-based expert-system shells in solving practical geological problems. The shells are programs that facilitate development of a knowledge base and an inference program to link rules and draw conclusions. The knowledge base consists of fact and rules. The facts include pore types and their relationships to matrix and cement. The rules relate these facts and, in turn, are used to make conclusions about the genesis of the pores. The genetic classification of P. Choquette and L. Pray is utilized to draw conclusions regarding process, direction, and timing of porosity development. The facts and rules of Porosity Advisor are derived from studies of Upper Pennsylvanian carbonate rocks in the Mid-Continent. Particular facts in this data base include type of pores, crosscutting relationships, geochemical parameters, association with megascopic, mappable features, and burial history. Facts and rules have different levels of significance because of imprecise measurement of facts and nonuniqueness of fact-rule relationships. Accordingly, confidence levels can be applied to both facts and rules. Some expert-system shells can read facts and rules from spreadsheet programs such as Lotus-1-2-3 and permit processing of large data sets. Programming options and tools such as these greatly facilitate the application and utility of these programs.

  8. A Workflow-based Intelligent Network Data Movement Advisor with End-to-end Performance Optimization

    SciTech Connect

    Zhu, Michelle M.; Wu, Chase Q.

    2013-11-07

    Next-generation eScience applications often generate large amounts of simulation, experimental, or observational data that must be shared and managed by collaborative organizations. Advanced networking technologies and services have been rapidly developed and deployed to facilitate such massive data transfer. However, these technologies and services have not been fully utilized mainly because their use typically requires significant domain knowledge and in many cases application users are even not aware of their existence. By leveraging the functionalities of an existing Network-Aware Data Movement Advisor (NADMA) utility, we propose a new Workflow-based Intelligent Network Data Movement Advisor (WINDMA) with end-to-end performance optimization for this DOE funded project. This WINDMA system integrates three major components: resource discovery, data movement, and status monitoring, and supports the sharing of common data movement workflows through account and database management. This system provides a web interface and interacts with existing data/space management and discovery services such as Storage Resource Management, transport methods such as GridFTP and GlobusOnline, and network resource provisioning brokers such as ION and OSCARS. We demonstrate the efficacy of the proposed transport-support workflow system in several use cases based on its implementation and deployment in DOE wide-area networks.

  9. DISPO Advisor: Expert System for Psychiatric Disposition

    PubMed Central

    Barta, Patrick; Barta, Wendy

    1988-01-01

    An expert system was designed to assist psychiatric residents at the Johns Hopkins Hospital. This microcomputer based decision support system helps residents find the proper disposition for patients who come to the emergency room. The system uses an inexpensive, commercially available expert system shell, VP-EXPERT by Paperback Software, to match patients with inpatient and outpatient resources appropriate to their needs. The inference engine uses both forward and backward chaining, and interfaces with data stored in DBase III files. The system is currently in daily use by residents.

  10. Does young adults' preferred role in decision making about health, money, and career depend on their advisors' leadership skills?

    PubMed

    Garcia-Retamero, Rocio; Galesic, Mirta

    2013-01-01

    Few empirical data exist on how decision making about health differs from that in other crucial life domains with less threatening consequences. To shed light on this issue we conducted a study with 175 young adults (average age 19 years). We presented the participants with scenarios involving advisors who provided assistance in making decisions about health, money, and career. For each scenario, participants were asked to what extent they wanted the advisor to exhibit several leadership styles and competencies and what role (active, collaborative, or passive) they preferred to play when making decisions. Results show that decision making about health is distinct from that in the other domains in three ways. First, most of the participants preferred to delegate decision making about their health to their physician, whereas they were willing to collaborate or play an active role in decision making about their career or money. Second, the competencies and leadership style preferred for the physician differed substantially from those desired for advisors in the other two domains: Participants expected physicians to show more transformational leadership--the style that is most effective in a wide range of environments--than those who provide advice about financial investments or career. Finally, participants' willingness to share medical decision making with their physician was tied to how strongly they preferred that the physician shows an effective leadership style. In contrast, motivation to participate in decision making in the other domains was not related to preferences regarding advisors' leadership style or competencies. Our results have implications for medical practice as they suggest that physicians are expected to have superior leadership skills compared to those who provide assistance in other important areas of life. PMID:22731631

  11. Supporting Students with a Personal Advisor

    ERIC Educational Resources Information Center

    De Carolis, Berardina; Pizzutilo, Sebastiano; Cozzolongo, Giovanni; Drozda, Pawel; Muci, Francesca

    2006-01-01

    Recently, many national and international initiatives show an increasing interest in promoting distance education interventions by Universities. These directives aim at supporting students during their studies providing them with personalized solutions to their problems related not only to the fruition of on-line courses but also to orientation…

  12. Internship Problems and the Academic Advisor's Role.

    ERIC Educational Resources Information Center

    Hagen, Suzanne J.

    As the business world has recognized the practical value of college programs designed to prepare students for careers, internships have begun to receive increasing attention as valuable additions to the speech communication curriculum. To discover the problems both interns and their faculty advisers face during the course of an internship,…

  13. What Is Ag-Ed?

    ERIC Educational Resources Information Center

    Lindley, Judy

    Ag-Ed is an agricultural education project aimed at upper primary students, held in conjunction with the Toowoomba Show (similar to a county fair) in Queensland, Australia. The program achieves its purpose of helping children understand the impact and relevance that agriculture has on their everyday lives through two components, an Ag-Ed day and a…

  14. Establishment of an inducible HBV stable cell line that expresses cccDNA-dependent epitope-tagged HBeAg for screening of cccDNA modulators.

    PubMed

    Cai, Dawei; Wang, Xiaohe; Yan, Ran; Mao, Richeng; Liu, Yuanjie; Ji, Changhua; Cuconati, Andrea; Guo, Haitao

    2016-08-01

    Hepatitis B virus (HBV) covalently closed circular (ccc) DNA is essential to the virus life cycle, its elimination during chronic infection is considered critical to a durable therapy but has not been achieved by current antivirals. Despite being essential, cccDNA has not been the major target of high throughput screening (HTS), largely because of the limitations of current HBV tissue culture systems, including the impracticality of detecting cccDNA itself. In response to this need, we have previously developed a proof-of-concept HepDE19 cell line in which the production of wildtype e antigen (HBeAg) is dependent upon cccDNA. However, the existing assay system is not ideal for HTS because the HBeAg ELISA cross reacts with a viral HBeAg homologue, which is the core antigen (HBcAg) expressed largely in a cccDNA-independent fashion in HepDE19 cells. To further improve the assay specificity, we report herein a "second-generation" cccDNA reporter cell line, termed HepBHAe82. In the similar principle of HepDE19 line, an in-frame HA epitope tag was introduced into the precore domain of HBeAg open reading frame in the transgene of HepBHAe82 cells without disrupting any cis-element critical for HBV replication and HBeAg secretion. A chemiluminescence ELISA assay (CLIA) for the detection of HA-tagged HBeAg with HA antibody serving as capture antibody and HBeAb serving as detection antibody has been developed to eliminate the confounding signal from HBcAg. The miniaturized HepBHAe82 cell based assay system exhibits high level of cccDNA-dependent HA-HBeAg production and high specific readout signals with low background. We have also established a HepHA-HBe4 cell line expressing transgene-dependent HA-HBeAg as a counter screen to identify HBeAg inhibitors. The HepBHAe82 system is amenable to antiviral HTS development, and can be used to identify host factors that regulate cccDNA metabolism and transcription. PMID:27185623

  15. Selective colorimetric sensors based on the monitoring of an unmodified silver nanoparticles (AgNPs) reduction for a simple and rapid determination of mercury

    NASA Astrophysics Data System (ADS)

    Jarujamrus, Purim; Amatatongchai, Maliwan; Thima, Araya; Khongrangdee, Thatsanee; Mongkontong, Chakrit

    2015-05-01

    In this work, selective colorimetric sensors for simple and rapid detection of Hg(II) ions based on the monitoring of an unmodified silver nanoparticles (AgNPs) reduction were developed. The average diameter of synthesized AgNPs was 8.3 ± 1.4 nm which was characterized by transmission electron microscopy (TEM). The abrupt change in absorbance of the unmodified AgNPs was observed which progressively decreased and slightly shifted to the blue wavelength as the concentration of Hg(II) increased, indicating the oxidation of Ag(0) to Ag(I) occurred. It appears that the AgNPs were oxidized by Hg(II), resulting in disintegration of the AgNPs into smaller particles as well as mediating the reduction of Hg(II) to Hg(0) adsorbed onto the surface of AgNPs. The adsorption of Hg(0) resulted in the lack of sufficient charges on AgNPs surfaces due to the decrease in the surface coverage of negatively charged citrate molecules, which then leaded to enlargement of AgNPs. The calibration curve of this technique was demonstrated from 0.5 to 7 ppm (r2 = 0.995), the limit of detection (LOD) was 0.06 ppm (SDblank/slope of calibration curve) with the precision (RSD, n = 4) of 3.24-4.53. Interestingly, the results show a significant enhance in the Hg(II) analytical sensitivity when Cu(II) is doped onto the unmodified AgNPs, which improves the quantitative detection limit to 0.008 ppm. In addition, greater selectivity toward Hg(II) compared with the other metal ions tested was observed. Furthermore, the percentage recoveries of spiked drinking water, tap water and SRM1641d (mercury in water) were in acceptable range with a good precision (RSD) which were in agreement with the values obtained from graphite furnace atomic absorption spectrometer (GFAAS). The technique proposed in this study provides a rapid, simple, sensitive and selective detection method for Hg(II) in water samples.

  16. Ordered silicon nanowire arrays prepared by an improved nanospheres self-assembly in combination with Ag-assisted wet chemical etching

    NASA Astrophysics Data System (ADS)

    Jia, Guobin; Westphalen, Jasper; Drexler, Jan; Plentz, Jonathan; Dellith, Jan; Dellith, Andrea; Andrä, Gudrun; Falk, Fritz

    2016-04-01

    An improved Langmuir-Blodgett self-assembly process combined with Ag-assisted wet chemical etching for the preparation of ordered silicon nanowire arrays is presented in this paper. The new process is independent of the surface conditions (hydrophilic or hydrophobic) of the substrate, allowing for depositing a monolayer of closely packed polystyrene nanospheres onto any flat surface. A full control of the morphology of the silicon nanowire is achieved. Furthermore, it is observed that the formation of porous-Si at the tips of the nanowires is closely related to the release of Ag nanoparticles from the Ag mask during the etching, which subsequently redeposit on the surface initially free of Ag, and these Ag nanoparticles catalyze the etching of the tips and lead to the porous-Si formation. This finding will help to improve the resulting nano- and microstructures to get them free of pores, and renders it a promising technology for low-cost high throughput fabrication of specific optical devices, photonic crystals, sensors, MEMS, and NEMS by substituting the costly BOSCH process. It is shown that ordered nanowire arrays free of porous structures can be produced if all sources of Ag nanoparticles are excluded, and structures with aspect ratio more than 100 can be produced.

  17. Association between CTLA-4 exon-1 +49A/G polymorphism and asthma: an updated meta-analysis.

    PubMed

    Yao, Ying-Shui; Wang, Lin-Hong; Chang, Wei-Wei; He, Lian-Ping; Li, Jie; Jin, Yue-Long; Li, Chao-Pin

    2015-01-01

    The results of studies on association between CTLA-4 exon-1 +49A/G (rs231775) polymorphism and susceptibility to asthma are controversial. To derive a more precise estimation of the relationship between the CTLA-4 exon-1 +49A/G polymorphism and asthma, a meta-analysis of 15 published case-control studies was performed. 15 studies meeting our inclusion criteria comprising 4006 asthma cases and 3729 controls were included. The effect summary odds ratio (OR) and 95% confidence intervals were obtained. Publication bias was tested by funnel plot, Egger's test and heterogeneity was assessed. The combined results showed that there were significant differences in genotype distribution between asthma cases and control on the basis of all studies, GG + GA versus AA (OR = 0.76, 95% CI: 0.62-0.93; P = 0.008). When stratifying for the race, the phenomenon was found that asthma cases had a significantly higher frequency of GG/GA versus AA (OR = 0.71; 95% CI: 0.51-0.99; P = 0.04) than control in Caucasian. Stratifying subjects by age indicated an association between CTLA-4 +49 GG + GA genotype and asthma in children (OR = 0.75; 95% CI: 0.62-0.90; P = 0.002), but no association in adults (OR = 0.93; 95% CI: 0.76-1.14; P = 0.48). Furthermore, significant association was observed in atopic asthma under the fixed-effects model (GG + GA vs. AA: P = 0.03, OR = 0.81, 95% CI = 0.67-0.98, P heterogeneity = 0.22). Our meta-analysis results suggest that CTLA-4 exon-1 +49A/G polymorphism might be a risk factor for asthma susceptibility, at least in Caucasian, children, and patients with atopy status. PMID:26064199

  18. Sea-urchin-like Fe3O4@C@Ag particles: an efficient SERS substrate for detection of organic pollutants

    NASA Astrophysics Data System (ADS)

    Ye, Yingjie; Chen, Jin; Ding, Qianqian; Lin, Dongyue; Dong, Ronglu; Yang, Liangbao; Liu, Jinhuai

    2013-06-01

    Ag-coated sea-urchin-like Fe3O4@C core-shell particles can be synthesized by a facile one-step solvothermal method, followed by deposition of high-density Ag nanoparticles onto the carbon surface through an in situ growth process, respectively. The as-synthesized Ag-coated Fe3O4@C particles can be used as a surface-enhanced Raman scattering (SERS) substrate holding reproducible properties under an external magnetic force. The magnetic function of the particles allows concentrating the composite particles into small spatial regions, which can be exploited to decrease the amount of material per analysis while improving its SERS detection limit. In contrast to the traditional SERS substrates, the present Fe3O4@C@Ag particles hold the advantages of enrichment of organic pollutants for improving SERS detection limit and recycled utilization.Ag-coated sea-urchin-like Fe3O4@C core-shell particles can be synthesized by a facile one-step solvothermal method, followed by deposition of high-density Ag nanoparticles onto the carbon surface through an in situ growth process, respectively. The as-synthesized Ag-coated Fe3O4@C particles can be used as a surface-enhanced Raman scattering (SERS) substrate holding reproducible properties under an external magnetic force. The magnetic function of the particles allows concentrating the composite particles into small spatial regions, which can be exploited to decrease the amount of material per analysis while improving its SERS detection limit. In contrast to the traditional SERS substrates, the present Fe3O4@C@Ag particles hold the advantages of enrichment of organic pollutants for improving SERS detection limit and recycled utilization. Electronic supplementary information (ESI) available: Additional XRD patterns and SEM images of Fe3O4@C particles, SERS spectra of 4-ATP and 4-MPY using Fe3O4@C@Ag particles as the active substrates, magnetic behaviour of Fe3O4@C and Fe3O4@C@Ag particles. See DOI: 10.1039/c3nr01273e

  19. An investigation of the microstructure and mechanical properties of electrochemically coated Ag(4)Sn dental alloy particles condensed in vitro

    NASA Astrophysics Data System (ADS)

    Marquez, Jose Antonio

    As part of the ongoing scientific effort to develop a new amalgam-like material without mercury, a team of metallurgists and electrochemists at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, announced in 1993 the development of a new Ag-Sn dental alloy system without mercury that sought to replace conventional dental amalgams. They used spherical Ag3Sn and Ag4Sn intermetallic dental alloy particles, commonly used in conventional dental alloys, and coated them with electrodeposited silver with newly-developed electrolytic and immersion techniques. The particles had relatively pure silver coatings that were closely adherent to the intermetalfic cores. These silver-coated particles, due to silver's plasticity at room temperature, were condensed into PlexiglasRTM molds with the aid of an acidic surface activating solution (HBF4) and a mechanical condensing device, producing a metal-matrix composite with Ag3,4Sn filler particles surrounded by a cold-welded silver matrix. Since silver strain hardens rather easily, the layers had to be condensed in less than 0.5 mm increments to obtain a dense structure. Mechanical testing at NIST produced compressive strength values equal to or greater than those of conventional dental amalgams. Because of its potential for eliminating mercury as a constituent in dental amalgam, this material created a stir in dental circles when first developed and conceivably could prove to be a major breakthrough in the field of dental restoratives. To date, the chief impediments to its approval for human clinical applications by the Food and Drug Administration are the potentially-toxic surface activating solution used for oxide reduction, and the high condensation pressures needed for cold welding because of the tendency for silver to strain harden. In this related study, the author, who has practiced general dentistry for 25 years, evaluates some of the mechanical and microstructural properties of these

  20. Photoproduced fluorescent Au(I)@(Ag2/Ag3)-thiolate giant cluster: an intriguing sensing platform for DMSO and Pb(II).

    PubMed

    Ganguly, Mainak; Mondal, Chanchal; Jana, Jayasmita; Pal, Anjali; Pal, Tarasankar

    2014-01-14

    Synergistic evolution of fluorescent Au(I)@(Ag2/Ag3)-thiolate core-shell particles has been made possible under the Sun in presence of the respective precursor coinage metal compounds and glutathione (GSH). The green chemically synthesized fluorescent clusters are giant (∼600 nm) in size and robust. Among all the common water miscible solvents, exclusively DMSO exhibits selective fluorescence quenching (Turn Off) because of the removal of GSH from the giant cluster. Again, only Pb(II) ion brings back the lost fluorescence (Turn On) leaving aside all other metal ions. This happens owing to the strong affinity of the sulfur donor of DMSO for Pb(II). Thus, employing the aqueous solution containing the giant cluster, we can detect DMSO contamination in water bodies at trace level. Besides, a selective sensing platform has emerged out for Pb(II) ion with a detection limit of 14 × 10(-8) M. Pb(II) induced fluorescence recovery is again vanished by I(-) implying a promising route to sense I(-) ion. PMID:24359547

  1. Effect of a prior stretch on the aging response of an Al-Cu-Li-Ag-Mg-Zr alloy

    NASA Technical Reports Server (NTRS)

    Kumar, K. S.; Brown, S. A.; Pickens, Joseph R.

    1991-01-01

    Recently, a family of Al-Cu-Li alloys containing minor amounts of Ag, Mg, and Zr and having desirable combinations of strength and toughness were developed. The Weldalite (trademark) alloys exhibit a unique characteristic in that with or without a prior stretch, they obtain significant strength-ductility combinations upon natural and artificial aging. The ultra-high strength (approximately 690 MPa yield strength) in the peak-aged tempers (T6 and T8) were primarily attributed to the extremely fine T(sub 1) (Al2CuLi) or T(sub 1)-type precipitates that occur in these alloys during artificial aging, whereas the significant natural aging response observed is attributed to strengthening from delta prime (Al3Li) and GP zones. In recent work, the aging behavior of an Al-Cu-Li-Ag-Mg alloy without a prior stretch was followed microstructurally from the T4 to the T6 condition. Commercial extrusions, rolled plates, and sheets of Al-Cu-Li alloys are typically subjected to a stretching operation before artificial aging to straighten the extrusions and, more importantly, introduce dislocations to simulate precipitation of strengthening phases such as T(sub 1) by providing relatively low-energy nucleation sites. The goals of this study are to examine the microstructure that evolves during aging of an alloy that was stretch after solution treatment and to compare the observations with those for the unstretched alloy.

  2. Effectiveness of an Online Graduate Preparation Program

    ERIC Educational Resources Information Center

    Brucato, Brittany

    2010-01-01

    The present study provides a controlled study of the effectiveness of an online graduate preparation program, The Virtual Advisor. The effects of the Virtual Advisor were compared to a website control and a wait-list control group in relation to a range of graduate school preparation variables. Students who utilized The Virtual Advisor were…

  3. Facile synthesis of S–Ag nanocomposites and Ag2S short nanorods by the interaction of sulfur with AgNO3 in PEG400

    NASA Astrophysics Data System (ADS)

    Zhang, Yan-Li; Xie, Xin-Yuan; Liang, Ming; Xie, Shu-Ming; Chen, Jie-Mei; Zheng, Wen-Jie

    2016-06-01

    A facile, eco-friendly and inexpensive method to prepare Ag2S short nanorods and S–Ag nanocomposites using sublimed sulfur, AgNO3, PVP and PEG400 was studied. According to x-ray diffraction and scanning electron microscopy of the Ag2S, the products are highly crystalline and pure Ag2S nanorods with diameters of 70–160 nm and lengths of 200–360 nm. X-ray diffraction of the S–Ag nanocomposites shows that we obtained cubic Ag and S nanoparticles. Transmission electron microscopy shows that the molar ratio of PVP to Ag+ plays an important role in controlling the size and morphology of the S–Ag nanocomposites. When the molar ratio of PVP to Ag+ was 10:1, smaller sizes, better dispersibility and narrower distribution of S–Ag nanocomposites with diameters of 10–40 nm were obtained. The formation mechanism of the S–Ag nanocomposites was studied by designing a series of experiments using ultraviolet–visible measurement, and it was found that S nanoparticles are produced first and act as seed crystals; then Ag+ becomes Ag nanocrystals on the surfaces of the S nanoparticles by the reduction of PVP. PEG400 acts as a catalyzer, accelerating the reaction rate, and protects the S–Ag nanocomposites from reacting to produce Ag2S. The antimicrobial experiments show that the S–Ag nanocomposites have greater antimicrobial activity on Staphylococcus aureus, Aspergillus niger and blue mold than Ag nanoparticles.

  4. Mentoring Support and Relational Uncertainty in the Advisor-Advisee Relationship

    ERIC Educational Resources Information Center

    Mansson, Daniel H.; Myers, Scott A.

    2013-01-01

    We examine the extent to which career mentoring and psychosocial mentoring received from their advisors relates to advisee perceptions of advisor-advisee relational uncertainty. Doctoral students (N = 378) completed the "Academic Mentoring Behaviors Scale" (Schrodt, Cawyer, & Sanders, 2003), the "Mentoring and Communication…

  5. Industrial-Organizational and Human Factors Graduate Program Admission: Information for Undergraduate Advisors

    ERIC Educational Resources Information Center

    Shoenfelt, Elizabeth L.; Stone, Nancy J.; Kottke, Janet L.

    2015-01-01

    Many psychology departments do not have industrial-organizational (IO) or human factors (HF) faculty members. As such, potential IO and HF graduate students may miss career opportunities because faculty advisors are unfamiliar with the disciplines and their graduate programs. To assist advisors, this article highlights the content of IO and HF…

  6. 78 FR 14297 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-05

    ... President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of... Black Colleges and Universities scheduled for March 6, 2013, and announced in the Federal Register on... Advisors on Historically Black Colleges and Universities, U.S. Department of Education, 400 Maryland...

  7. "What Haven't I Learned?" Learning Resulting from the Resident Advisor Role

    ERIC Educational Resources Information Center

    Benjamin, Mimi; Davis, Laura

    2016-01-01

    Employment can enhance learning for many college students, and on-campus jobs provide unique opportunities for this experience. The resident advisor position is one on-campus position offering the potential for learning experiences. This qualitative study highlights learning noted by 78 resident advisors at a large research institution during a…

  8. 76 FR 35054 - President's Council of Advisors on Science and Technology; Notice of Partially Closed Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-15

    ... From the Federal Register Online via the Government Publishing Office OFFICE OF SCIENCE AND TECHNOLOGY POLICY President's Council of Advisors on Science and Technology; Notice of Partially Closed... partially closed meeting of the President's Council of Advisors on Science and Technology (PCAST),...

  9. 78 FR 32281 - ProShares Advisors LLC, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-29

    ... COMMISSION ProShares Advisors LLC, et al.; Notice of Application May 21, 2013. AGENCY: Securities and... exemption from sections 12(d)(1)(A) and (B) of the Act. Applicants: ProShares Advisors LLC (``ProShares''), ProShares Trust (the ``Trust''), and SEI Investments Distribution Co. (``SEI''). Summary...

  10. 78 FR 46388 - NGAM Advisors, L.P., et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-31

    ... COMMISSION NGAM Advisors, L.P., et al.; Notice of Application July 25, 2013. AGENCY: Securities and Exchange... Advisors, L.P. (the ``Adviser''), Natixis ETF Trust (the ``Trust'') and NGAM Distribution, L.P. Filing... mail. Hearing requests should be received by the Commission by 5:30 p.m. on August 19, 2013 and...

  11. Roles and Responsibilities of International Student Advisors and Counselors in the United States.

    ERIC Educational Resources Information Center

    Dalili, Farid

    The separate but complementary roles of the international student advisor and counselor are discussed, and foreign student personnel services are addressed. It is suggested that the increasing number of international students indicates a need for a full-time foreign student advisor. The job is complicated by the different cultures and different…

  12. A Preliminary Report of Advisor Perceptions of Advising and of a Profession

    ERIC Educational Resources Information Center

    Aiken-Wisniewski, Sharon A.; Johnson, Anna; Larson, Joshua; Barkemeyer, Jason

    2015-01-01

    Practicing advisors may not agree, know, or understand that advising does not meet the scholarly definition of a profession. Through a phenomenological study, members of NACADA: The Global Community for Academic Advising were invited to describe the position of academic advisor. The data gathered were used to address two research questions:…

  13. Gay-Straight Alliance Advisors: Negotiating Multiple Ecological Systems when Advocating for LGBTQ Youth

    ERIC Educational Resources Information Center

    Watson, Laurel B.; Varjas, Kris; Meyers, Joel; Graybill, Emily C.

    2010-01-01

    This qualitative study investigated the barriers and facilitators that advisors of gay-straight alliances encounter when advocating for LGBTQ (lesbian, gay, bisexual, transgender, and queer) youth within schools. Twenty-two advisors were interviewed, and data revealed that multiple ecological systems (e.g., sociocultural, school, and individual…

  14. Students Speak Out: Preliminary Qualitative Findings of a Mentor/Advisor Project.

    ERIC Educational Resources Information Center

    Welkowitz, Julie A.; Broer, Stephen M.; Topper, Karen; Thomas, Cassandra; Backus, Linda; Hamilton, Ruth

    This report explores the impact, through themes that emerged in interviews with 59 participating adolescents, of the Mentor/Advisor Program on students with or at risk of emotional disturbance. The Mentor/Advisor Program is implemented as part of the existing regular education high school curriculum and is designed to promote resiliency and school…

  15. 76 FR 18383 - Extension of Sunset Date for Attorney Advisor Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-04

    ... available on the date of publication in the Federal Register at http://www.gpoaccess.gov/fr/index.html... attorney advisors to conduct certain prehearing procedures. 72 FR 44763. We instituted this practice to... final rule. 73 FR 11349. Under this rule, attorney advisors may develop claims and, in appropriate...

  16. 78 FR 11865 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-20

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF EDUCATION President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of Education, President's Board of Advisors on Historically Black Colleges and Universities (Board)....

  17. 77 FR 29621 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-18

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF EDUCATION President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of Education, President's Board of Advisors on Historically Black Colleges and Universities (Board)....

  18. 75 FR 53279 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-31

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF EDUCATION President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of Education, President's Board of Advisors on Historically Black Colleges and Universities (Board)....

  19. Perceptions of Freedom and Commitment as Sources of Self-Efficacy among Pedagogical Advisors

    ERIC Educational Resources Information Center

    Kass, Efrat; Rajuan, Maureen

    2012-01-01

    The perceptions of the role of the pedagogical advisor are multiple and diverse. This amorphous situation places importance on the sense of self-efficacy among those filling this role. Examined in this study was what pedagogical advisors perceive as factors affecting their professional self-efficacy through in-depth interviews of 10 experienced…

  20. A Cross-Cultural Relationship between the Advisor and the Advisee: Dissertation Writing Supervision in Science.

    ERIC Educational Resources Information Center

    Dong, Yu Ren

    A study examined the supervisory relationship between a non-native English-speaking doctoral student and a native English-speaking advisor, particularly in science, focusing on factors leading to effective or ineffective supervision, advisee response to advisor guidance and assistance, and the roles played by the two participants. Subjects were…

  1. 78 FR 69155 - Altegris Advisors, L.L.C., et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-18

    ... COMMISSION Altegris Advisors, L.L.C., et al.; Notice of Application November 12, 2013. AGENCY: Securities and...: Altegris Advisors, L.L.C. (the ``Adviser'') and Northern Lights Fund Trust (the ``Trust''), on behalf of... section 12(d)(l)(A)(i) of the Act, the Board of the Unaffiliated Investment Company, including a...

  2. Student Organization Advisor Motives to Volunteer at Four-Year Institutions of Higher Education

    ERIC Educational Resources Information Center

    Meyer, Robert A.; Kroth, Michael

    2010-01-01

    Many higher education institutions require student organization advisors to be employees. Such requirements can be interpreted as barriers to students and can limit the number and types of groups found on college campuses. Using quantitative analysis, this study investigates the motivation of student organization advisors at six public…

  3. 77 FR 13296 - Subcommittee Meeting of the Board of Advisors to the President, Naval Postgraduate School

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-06

    ... Department of the Navy Subcommittee Meeting of the Board of Advisors to the President, Naval Postgraduate... Advisors to the Presidents of the Naval Postgraduate School and the Naval War College). This meeting will... meeting will be held at the Naval Postgraduate School, Herrmann Hall, 1 University Circle, Didactic...

  4. The Advisor and Instructor as a Dynamic Duo: Academic Motivation and Basic Psychological Needs

    ERIC Educational Resources Information Center

    Burt, Tracie D.; Young-Jones, Adena D.; Yadon, Carly A.; Carr, Michael T.

    2013-01-01

    Students learn in and out of a formal classroom, and instructors and academic advisors play key roles in academic motivation and learning. Therefore, through the lens of self-determination theory, we examined the ways perceived support from instructors and advisors relates to satisfaction of college students' basic psychological needs.…

  5. 12 CFR 250.406 - Serving member bank and investment advisor with mutual fund affiliation.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 4 2013-01-01 2013-01-01 false Serving member bank and investment advisor with... Interpretations of Section 32 of the Glass-Steagall Act § 250.406 Serving member bank and investment advisor with... requested with respect to service as vice president of a corporation engaged in supplying investment...

  6. 12 CFR 250.406 - Serving member bank and investment advisor with mutual fund affiliation.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 4 2012-01-01 2012-01-01 false Serving member bank and investment advisor with... Interpretations of Section 32 of the Glass-Steagall Act § 250.406 Serving member bank and investment advisor with... requested with respect to service as vice president of a corporation engaged in supplying investment...

  7. 12 CFR 250.406 - Serving member bank and investment advisor with mutual fund affiliation.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 3 2011-01-01 2011-01-01 false Serving member bank and investment advisor with... Section 32 of the Glass-Steagall Act § 250.406 Serving member bank and investment advisor with mutual fund... respect to service as vice president of a corporation engaged in supplying investment advice...

  8. 12 CFR 250.406 - Serving member bank and investment advisor with mutual fund affiliation.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 4 2014-01-01 2014-01-01 false Serving member bank and investment advisor with... Interpretations of Section 32 of the Glass-Steagall Act § 250.406 Serving member bank and investment advisor with... requested with respect to service as vice president of a corporation engaged in supplying investment...

  9. Using Mentoring Enactment Theory to Explore the Doctoral Student-Advisor Mentoring Relationship

    ERIC Educational Resources Information Center

    Mansson, Daniel H.; Myers, Scott A.

    2012-01-01

    The purposes of this study were (a) to develop a new measure to assess doctoral advisees' use of relational maintenance behaviors with their advisors, and (b) to examine both advisees' (n = 636) and advisors' (n = 141) perceptions of their mentoring relationship using mentoring enactment theory (MET; Kalbfleisch, 2002). The results of…

  10. 17 CFR 4.27 - Additional reporting by advisors of certain large commodity pools.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... section 4.10(f); (4) Net asset value or NAV has the same meaning as net asset value as defined in section... advisors of certain large commodity pools. 4.27 Section 4.27 Commodity and Securities Exchanges COMMODITY... Operators § 4.27 Additional reporting by advisors of certain large commodity pools. (a) General...

  11. 17 CFR 4.27 - Additional reporting by advisors of certain large commodity pools.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... section 4.10(f); (4) Net asset value or NAV has the same meaning as net asset value as defined in section... advisors of certain large commodity pools. 4.27 Section 4.27 Commodity and Securities Exchanges COMMODITY... Operators § 4.27 Additional reporting by advisors of certain large commodity pools. (a) General...

  12. 76 FR 66096 - RiverPark Advisors, LLC, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-25

    ... COMMISSION RiverPark Advisors, LLC, et al.; Notice of Application October 19, 2011. AGENCY: Securities and... exemption from sections 12(d)(1)(A) and (B) of the Act. Applicants: RiverPark Advisors, LLC (``RiverPark''), RiverPark Funds Trust (the ``Trust'') and ALPS Distributors, Inc. (the ``Distributor''). Summary...

  13. Working with Youth on LGBT Issues: Why Gay-Straight Alliance Advisors Become Involved

    ERIC Educational Resources Information Center

    Valenti, Maria; Campbell, Rebecca

    2009-01-01

    This phenomenological qualitative study explores motivation for citizen participation in a local context by exploring the experiences of Gay-Straight Alliance (GSA) club advisors from public high schools. Fourteen advisors from one midwestern state were randomly recruited for participation. Inductive and deductive qualitative analyses elucidated…

  14. 78 FR 77175 - Catalyst Capital Advisors LLC and Mutual Fund Series Trust; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-20

    ... COMMISSION Catalyst Capital Advisors LLC and Mutual Fund Series Trust; Notice of Application December 16... agreements without shareholder approval. APPLICANTS: Catalyst Capital Advisors LLC (``CCA'' or the ``Adviser'') and Mutual Fund Series Trust (formerly Catalyst Funds) (the ``Trust''). DATES: Filing Dates:...

  15. 75 FR 9006 - President's Council of Advisors on Science and Technology; Notice of Meeting: Partially Closed...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-26

    ... areas where understanding of science, technology, and innovation is key to strengthening our economy and... TECHNOLOGY POLICY President's Council of Advisors on Science and Technology; Notice of Meeting: Partially Closed Meeting of the President's Council of Advisors on Science and Technology ACTION: Public...

  16. 40 CFR 35.4190 - How does my group identify a qualified technical advisor?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... example, toxicology). (c) Your group should select a technical advisor who has experience working on... 40 Protection of Environment 1 2010-07-01 2010-07-01 false How does my group identify a qualified... Technical Advisor Or Other Contractor with Tag Funds § 35.4190 How does my group identify a...

  17. Academic Advisee Motives for Pursuing Out-of-Class Communication with the Faculty Academic Advisor

    ERIC Educational Resources Information Center

    Leach, Rebecca B.; Wang, Tiffany R.

    2015-01-01

    This study examined advisee communication motives for engaging in out-of-class communication (OCC) with the faculty academic advisor. Undergraduate students (n = 21) were interviewed about their motives for engaging in OCC with their faculty academic advisors. In a thematic analysis, six motives emerged for engaging in OCC with faculty academic…

  18. Ag/C nanoparticles as an cathode catalyst for a zinc-air battery with a flowing alkaline electrolyte

    NASA Astrophysics Data System (ADS)

    Han, Jia-Jun; Li, Ning; Zhang, Tian-Yun

    The cyclic voltammetry indicated that the oxygen reduction reaction (ORR) proceeded by the four-electron pathway mechanism on larger Ag particles (174 nm), and that the ORR proceeded by the four-electron pathway and the two-electron pathway mechanisms on finer Ag particles (4.1 nm), simultaneously. The kinetics towards ORR was measured at a rotating disk electrode (RDE) with Ag/C electrode. The number of exchanged electrons for the ORR was found to be close to four on larger Ag particles (174 nm) and close to three on finer Ag particles (4.1 nm). The zinc-air battery with Ag/C catalysts (25.9 nm) was fabricated and examined.

  19. Doing Research Together: A Study on the Views of Advisors with Intellectual Disabilities and Non-Disabled Researchers Collaborating in Research

    ERIC Educational Resources Information Center

    Puyalto, Carol; Pallisera, Maria; Fullana, Judit; Vilà, Montserrat

    2016-01-01

    Background: Despite an increase in inclusive studies in recent years, research on the views of the people with and without disabilities who have participated in these studies is scarce. The aim of this study was to explore the perceptions and views of advisors with intellectual disabilities and non-disabled researchers who collaborated together on…

  20. An oil-in-water self-assembly synthesis, characterization and photocatalytic properties of nano Ag@AgCl surface-sensitized K{sub 2}Ti{sub 4}O{sub 9}

    SciTech Connect

    Liang, Yinghua; Lin, Shuanglong; Liu, Li Hu, Jinshan; Cui, Wenquan

    2014-12-15

    Highlights: • The plasmatic Ag@AgCl surface-sensitized K{sub 2}Ti{sub 4}O{sub 9} composite photocatalysts. • Ag@AgCl greatly increased visible light absorption for K{sub 2}Ti{sub 4}O{sub 9}. • The photocatalysts exhibited enhanced photocatalytic dye degradation. - Abstract: Nano-sized plasmonic Ag@AgCl surface-sensitized K{sub 2}Ti{sub 4}O{sub 9} composite photocatalysts (hereafter designated as Ag@AgCl/K{sub 2}Ti{sub 4}O{sub 9}) was synthesized via a facile oil-in-water self-assembly method. The photocatalytic activity of the prepared materials for RhB (Rhodamine B) degradation was examined under visible light irradiation. The results reveal that the size of Ag@AgCl, which evenly dispersed on the surface of K{sub 2}Ti{sub 4}O{sub 9}, distributes about 20–50 nm. The UV–vis diffuse reflectance spectra indicate that Ag@AgCl/K{sub 2}Ti{sub 4}O{sub 9} samples have a significantly enhanced optical absorption in 380–700 nm. The photocatalytic activities of the Ag@AgCl/K{sub 2}Ti{sub 4}O{sub 9} samples increase first and then decrease with increasing amount of loading Ag@AgCl and the Ag@AgCl(20 wt.%)/K{sub 2}Ti{sub 4}O{sub 9} sample exhibits the best photocatalytic activity and 94.47% RhB was degraded after irradiation for 2 h. Additionally, studies performed using radical scavengers indicated that O{sub 2}·{sup −} and Cl{sup 0} acted as the main reactive species. The electronic interaction was systematically studied and confirmed by the photo-electrochemical measurements.

  1. 77 FR 60732 - PACE Select Advisors Trust and UBS Global Asset Management (Americas) Inc.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-04

    ... COMMISSION PACE Select Advisors Trust and UBS Global Asset Management (Americas) Inc.; Notice of Application... requirements. The requested order would supersede two prior orders.\\1\\ \\1\\ PaineWebber PACE Select Advisors...) and 21666 (Jan. 11, 1996) (order). Applicants: PACE Select Advisors Trust (the ``Trust'') and...

  2. Advisor-Advisee Three: Graduate Students' Perceptions of Verbal Aggression, Credibility, and Conflict Styles in the Advising Relationship

    ERIC Educational Resources Information Center

    Punyanunt-Carter, Narissra M.; Wrench, Jason S.

    2008-01-01

    The current study looked at the relation between advisee perceptions of advisor's verbal aggression, credibility, and conflict styles. Participants were 153 graduate students who reported their perceptions concerning their advisor. First, the study found that advisee perceptions of their advisor's credibility (competence, caring/goodwill, &…

  3. Strongly visible-light responsive plasmonic shaped AgX:Ag (X = Cl, Br) nanoparticles for reduction of CO2 to methanol

    NASA Astrophysics Data System (ADS)

    An, Changhua; Wang, Jizhuang; Jiang, Wen; Zhang, Meiyu; Ming, Xijuan; Wang, Shutao; Zhang, Qinhui

    2012-08-01

    Plasmonic shaped AgX:Ag (X = Cl, Br) nanoparticles have been synthesized by a facile and versatile glycerol-mediated solution route. The as-prepared AgX:Ag nanoparticles exhibit regular shapes, i.e., cube-tetrapod-like AgCl:Ag nanoparticles and AgBr:Ag nanoplates. Compared with the pristine AgX, AgX:Ag nanocomposites display stronger absorption in the visible region due to the surface plasmon resonance of silver nanoparticles. The calculation of bandgaps and band positions indicates the as-achieved AgX:Ag nanoparticles can be used as a class of potential photocatalyst for the reduction of CO2. For example, reduction of CO2 under visible light irradiation with the assistance of the anisotropic AgX:Ag nanoparticles yields as much as 100 μmol methanol in the products. Furthermore, the AgX:Ag nanoparticles can maintain its structure and activity after 3 runs of reactions. Therefore, the present route opens an avenue to acquire plasmonic photocatalysts for conversion of CO2 into useful organic compounds.Plasmonic shaped AgX:Ag (X = Cl, Br) nanoparticles have been synthesized by a facile and versatile glycerol-mediated solution route. The as-prepared AgX:Ag nanoparticles exhibit regular shapes, i.e., cube-tetrapod-like AgCl:Ag nanoparticles and AgBr:Ag nanoplates. Compared with the pristine AgX, AgX:Ag nanocomposites display stronger absorption in the visible region due to the surface plasmon resonance of silver nanoparticles. The calculation of bandgaps and band positions indicates the as-achieved AgX:Ag nanoparticles can be used as a class of potential photocatalyst for the reduction of CO2. For example, reduction of CO2 under visible light irradiation with the assistance of the anisotropic AgX:Ag nanoparticles yields as much as 100 μmol methanol in the products. Furthermore, the AgX:Ag nanoparticles can maintain its structure and activity after 3 runs of reactions. Therefore, the present route opens an avenue to acquire plasmonic photocatalysts for conversion of CO2

  4. Toxicokinetics of Ag in the terrestrial isopod Porcellionides pruinosus exposed to Ag NPs and AgNO₃ via soil and food.

    PubMed

    Tourinho, Paula S; van Gestel, Cornelis A M; Morgan, A John; Kille, Peter; Svendsen, Claus; Jurkschat, Kerstin; Mosselmans, J Fred W; Soares, Amadeu M V M; Loureiro, Susana

    2016-03-01

    Silver nanoparticles (Ag NPs) have been used in numerous consumer products and may enter the soil through the land application of biosolids. However, little is known about the relationship between Ag NP exposure and their bioavailability for soil organisms. This study aims at comparing the uptake and elimination kinetics of Ag upon exposures to different Ag forms (NPs and ionic Ag (as AgNO3)) in the isopod Porcellionides pruinosus. Isopods were exposed to contaminated Lufa 2.2 soil or alder leaves as food. Uptake and elimination rate constants for soil exposure did not significantly differ between Ag NPs and ionic Ag at 30 and 60 mg Ag/kg. For dietary exposure, the uptake rate constant was up to 5 times higher for Ag NPs than for AgNO3, but this was related to feeding activity and exposure concentrations, while no difference in the elimination rate constants was found. When comparing both routes, dietary exposure resulted in lower Ag uptake rate constants but elimination rate constants did not differ. A fast Ag uptake was observed from both routes and most of the Ag taken up seemed not to be eliminated. Synchrotron X-ray fluorescence showed Ag in the S-cells of the hepatopancreas, thus supporting the observations from the kinetic experiment (i.e. low elimination). In addition, our results show that isopods have an extremely high Ag accumulation capacity, suggesting the presence of an efficient Ag storage compartment. PMID:26581474

  5. Microstructural evolution during aging of an Al-Cu-Li-Ag-Mg-Zr alloy

    NASA Technical Reports Server (NTRS)

    Kumar, K. S.; Brown, S. A.; Pickens, Joseph R.

    1991-01-01

    Alloys in the Al-Cu-Li Ag-Mg subsystem were developed that exhibit desirable combinations of strength and ductility. These Weldalite (trademark) alloys, are unique for Al-Cu-Li alloys in that with or without a prior cold stretching operation, they obtain excellent strength-ductility combinations upon natural and artificial aging. This is significant because it enables complex, near-net shape products such as forgings and super plastically formed parts to be heat treated to ultra-high strengths. On the other hand, commercial extrusions, rolled plates and sheets of other Al-Cu-Li alloys are typically subjected to a cold stretching operation before artificial aging to the highest strength tempers to introduce dislocations that provide low-energy nucleation sites for strengthening precipitates such as the T(sub 1) phase. The variation in yield strength (YS) with Li content in the near-peak aged condition for these Weldalite (trademark) alloys and the associated microstructures were examined, and the results are discussed.

  6. Allergy Vaccines Using a Mycobacterium-Secreted Antigen, Ag85B, and an IL-4 Antagonist.

    PubMed

    Tsujimura, Yusuke; Yasutomi, Yasuhiro

    2016-01-01

    In recent decades, the prevalence of allergic diseases, including bronchial asthma, airway hypersensitivity, hay fever, and atopic dermatitis, has been increasing in the industrialized world, and effective treatments probably require manipulating the inflammatory response to pathogenic allergens. T helper (Th) 2 cells are thought to play a crucial role in the initiation, progression, and persistence of allergic responses in association with production of interleukin (IL)-4, IL-5, and IL-13. Therefore, a strategy of a shift from Th2- to Th1-type immune response may be valuable in the prophylaxis and management of allergic diseases. It is also necessary to develop prophylactic and therapeutic treatment that induces homeostatic functions in the multifaceted allergic environment, because various factors including innate and adaptive immunity, mucosal immune response, and functional and structural maintenance of local tissue might be involved in the pathogenesis of allergic disorders. We review herein recent findings related to the curative effect for mouse models of asthma and atopic dermatitis using DNA-, virus-, and protein-based vaccines of a Mycobacterium secretion antigen, Ag85B, and a plasmid encoding cDNA of antagonistic IL-4 mutant. PMID:27076163

  7. Effect of a prior stretch on the aging response of an Al-Cu-Li-Ag-Mg-Zr alloy

    NASA Technical Reports Server (NTRS)

    Kumar, K. S.; Brown, S. A.; Pickens, J. R.

    1990-01-01

    The effect of a prior stretching of an aluminum alloy Al-5.3Cu-1.4Li-0.4Ag-0.4Mg-0.17Zr (in wt pct) on the microstructure that develops during aging of this alloy was investigated by comparing TEM and SAD observations and hardness curves with results for the unstretched alloy. The results suggest that stretching introduces a significant number of dislocations which may act as vacanacy sinks by sweeping vacancies away and thereby decreasing the vacancy concentration available for influencing the natural aging response. In the stretched and near-peak aged condition, a fine homogeneous distribution of T1, theta-prime, and S-prime phases were observed in an alpha solid solution matrix. Upon overaging, virtually all of the theta-prime and most of the S-prime phases were found to dissolve, leaving behind a microstructure of T1 precipitates.

  8. Modulation of localized surface plasmon resonance for an array of Ag nanostructures layered with nematic liquid crystals

    NASA Astrophysics Data System (ADS)

    Shang, Zhenzhen; Huang, Haishen; Wan, Yuan; Deng, Luogen

    2016-08-01

    Sensitivity of the localized surface plasmon resonance (LSPR) for an array of Ag (silver) nanostructures layered with nematic liquid crystals (NLC) is investigated. Calculations are made by using finite-difference time-domain (FDTD) method under different geometrical and environmental parameters. Results show that the LSPR wavelength in this array can be controlled and tuned to infrared wavelength range by the rotation of the NLC optical-axis. The rotation of the array and the modifications to height of the NLC layer, the size and periods of the array can affect the sensitivity of the LSPR. The sensitivity is higher when the optical-axis is in xoz plane, than that for the optical-axis in xoy plane. An improved sensitivity has been obtained in the simulation.

  9. Assessing Youth Perceptions and Knowledge of Agriculture: The Impact of Participating in an AgVenture Program

    ERIC Educational Resources Information Center

    Luckey, Alisa Nicole; Murphrey, Theresa Pesl; Cummins, Richard L.; Edwards, Michael B.

    2013-01-01

    Agricultural education programs such as AgVenture have been established to educate youth about the importance of agriculture. The study reported here examined the direct impact that one agricultural education program, specifically AgVenture, had on youth perceptions and knowledge of agriculture. Youth's perceptions and knowledge of…

  10. An Ag(I) energetic metal-organic framework assembled with the energetic combination of furazan and tetrazole: synthesis, structure and energetic performance.

    PubMed

    Qu, Xiao-Ni; Zhang, Sheng; Wang, Bo-Zhou; Yang, Qi; Han, Jing; Wei, Qing; Xie, Gang; Chen, San-Ping

    2016-04-28

    A novel Ag(I) energetic MOF [Ag16(BTFOF)9]n·[2(NH4)]n () assembled with Ag(iI ions and a furazan derivative, 4,4'-oxybis[3,3'-(1H-5-tetrazol)]furazan (H2BTFOF) was successfully synthesized and structurally characterized, featuring a three-dimensional porous structure incorporating ammonium cations. The thermal stability and energetic properties were determined, revealing that the 3D energetic MOF had an outstanding insensitivity (IS > 40 J), an ultrahigh detonation pressure (P) of 65.29 GPa and a detonation velocity (D) of 11.81 km cm(-3). In addition, the self-accelerating decomposition temperature (TSADT) and the critical temperature of thermal explosion (Tb) are also discussed in detail. The finding exemplifies that the assembly strategy plays a decisive role in the density and energetic properties of MOF-based energetic materials. PMID:26987079

  11. VAS: A Vision Advisor System combining agents and object-oriented databases

    NASA Technical Reports Server (NTRS)

    Eilbert, James L.; Lim, William; Mendelsohn, Jay; Braun, Ron; Yearwood, Michael

    1994-01-01

    A model-based approach to identifying and finding the orientation of non-overlapping parts on a tray has been developed. The part models contain both exact and fuzzy descriptions of part features, and are stored in an object-oriented database. Full identification of the parts involves several interacting tasks each of which is handled by a distinct agent. Using fuzzy information stored in the model allowed part features that were essentially at the noise level to be extracted and used for identification. This was done by focusing attention on the portion of the part where the feature must be found if the current hypothesis of the part ID is correct. In going from one set of parts to another the only thing that needs to be changed is the database of part models. This work is part of an effort in developing a Vision Advisor System (VAS) that combines agents and objected-oriented databases.

  12. Parabolic Trough Reference Plant for Cost Modeling with the Solar Advisor Model (SAM)

    SciTech Connect

    Turchi, C.

    2010-07-01

    This report describes a component-based cost model developed for parabolic trough solar power plants. The cost model was developed by the National Renewable Energy Laboratory (NREL), assisted by WorleyParsons Group Inc., for use with NREL's Solar Advisor Model (SAM). This report includes an overview and explanation of the model, two summary contract reports from WorleyParsons, and an Excel spreadsheet for use with SAM. The cost study uses a reference plant with a 100-MWe capacity and six hours of thermal energy storage. Wet-cooling and dry-cooling configurations are considered. The spreadsheet includes capital and operating cost by component to allow users to estimate the impact of changes in component costs.

  13. Growth of Ag-nanoparticles in an aqueous solution and their antimicrobial activities against Gram positive, Gram negative bacterial strains and Candida fungus.

    PubMed

    Aazam, Elham Shafik; Zaheer, Zoya

    2016-04-01

    Silver nanoparticles (AgNPs) were synthesized using Ocimum sanctum (Tulsi) leaves aqueous extract as reducing as well as a capping agent in absence and presence of cetyltrimethylammonium bromide (CTAB). The resulting nanomaterials were characterized by UV-visible spectrophotometer, and transmission electron microscope. The UV-Vis spectroscopy revealed the formation of AgNPs at 400-450 nm. TEM photographs indicate that the truncated triangular silver nanoplates and/or spherical morphology of the AgNPs with an average diameter of 25 nm have been distorted markedly in presence of CTAB. The AgNPs were almost mono disperse in nature. Antimicrobial activities of AgNPs were determined by using two bacteria (Gram positive Staphylococcus aureus MTCC-3160), Gram negative Escherichia coli MTCC-450) and one species of Candida fungus (Candida albicans ATCC 90030) with Kirby-Bauer or disc diffusion method. The zone of inhibition seems extremely good showing a relatively large zone of inhibition in both Staphylococcus aureus, Escherichia coli, and Candida albicans strains. PMID:26796584

  14. Creep-constitutive behavior of Sn-3.8Ag-0.7Cu solder using an internal stress approach

    NASA Astrophysics Data System (ADS)

    Rist, Martin A.; Plumbridge, W. J.; Cooper, S.

    2006-05-01

    The experimental tensile creep deformation of bulk Sn-3.8Ag-0.7Cu solder at temperatures between 263 K and 398 K, covering lifetimes up to 3,500 h, has been rationalized using constitutive equations that incorporate structure-related internal state variables. Primary creep is accounted for using an evolving internal back stress, due to the interaction between the soft matrix phase and a more creep-resistant particle phase. Steady-state creep is incorporated using a conventional power law, modified to include the steady-state value of internal stress. It is demonstrated that the observed behavior is well-fitted using creep constants for pure tin in the modified creep power law. A preliminary analysis of damage-induced tertiary creep is also presented.

  15. AgH, Ag/sub 2/, and AgO revisited: Basis set extensions

    SciTech Connect

    Martin, R.L.

    1987-05-01

    An extended basis set has been developed for Ag which significantly improves the agreement between theoretical and experimental spectroscopic parameters for AgH, AgO, and Ag/sub 2/. The major improvement comes about as a result of the improved treatment of electron correlation in the Ag d shell upon the introduction of f functions. Their inclusion produces very slight differences at the SCF level, but significant reductions in r/sub e/ and increases in ..omega../sub e/ and D/sub e/ in the Mo-dash-barller--Plesset perturbation theory expansion. At the MP4(SDTQ) level, typical results are 0.02 A too long for r/sub e/, 4% too low for ..omega../sub e/, and 10 kcal too small for D/sub e/. From a pragmatic standpoint, MP2 give results very similar to this at a much reduced level of effort.

  16. Generic CSP Performance Model for NREL's System Advisor Model: Preprint

    SciTech Connect

    Wagner, M. J.; Zhu, G.

    2011-08-01

    The suite of concentrating solar power (CSP) modeling tools in NREL's System Advisor Model (SAM) includes technology performance models for parabolic troughs, power towers, and dish-Stirling systems. Each model provides the user with unique capabilities that are catered to typical design considerations seen in each technology. Since the scope of the various models is generally limited to common plant configurations, new CSP technologies, component geometries, and subsystem combinations can be difficult to model directly in the existing SAM technology models. To overcome the limitations imposed by representative CSP technology models, NREL has developed a 'Generic Solar System' (GSS) performance model for use in SAM. This paper discusses the formulation and performance considerations included in this model and verifies the model by comparing its results with more detailed models.

  17. System Advisor Model: Flat Plate Photovoltaic Performance Modeling Validation Report

    SciTech Connect

    Freeman, J.; Whitmore, J.; Kaffine, L.; Blair, N.; Dobos, A. P.

    2013-12-01

    The System Advisor Model (SAM) is a free software tool that performs detailed analysis of both system performance and system financing for a variety of renewable energy technologies. This report provides detailed validation of the SAM flat plate photovoltaic performance model by comparing SAM-modeled PV system generation data to actual measured production data for nine PV systems ranging from 75 kW to greater than 25 MW in size. The results show strong agreement between SAM predictions and field data, with annualized prediction error below 3% for all fixed tilt cases and below 8% for all one axis tracked cases. The analysis concludes that snow cover and system outages are the primary sources of disagreement, and other deviations resulting from seasonal biases in the irradiation models and one axis tracking issues are discussed in detail.

  18. Design and expression of fusion protein consists of HBsAg and Polyepitope of HCV as an HCV potential vaccine

    PubMed Central

    Gholizadeh, Monireh; Khanahmad, Hossein; Memarnejadian, Arash; Aghasadeghi, Mohammad Reza; Roohvand, Farzin; Sadat, Seyed Mehdi; Cohan, Reza Ahangari; Nazemi, Ali; Motevalli, Fatemeh; Asgary, Vahid; Arezumand, Roghaye

    2015-01-01

    Background: Hepatitis C virus (HCV) infection is a serious public health threat worldwide. Cellular immune responses, especially cytotoxic T-lymphocytes (CTLs), play a critical role in immune response toward the HCV clearance. Since polytope vaccines have the ability to stimulate the cellular immunity, a recombinant fusion protein was developed in this study. Materials and Methods: The designed fusion protein is composed of hepatitis B surface antigen (HBsAg), as an immunocarrier, fused to an HCV polytope sequence. The polytope containing five immunogenic epitopes of HCV was designed to induce specific CTL responses. The construct was cloned into the pET-28a, and its expression was investigated in BL21 (DE3), BL21 pLysS, BL21 pLysE, and BL21 AI Escherichia coli strains using 12% gel sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Finally, the identity of expressed fusion protein was confirmed by Western blotting using anti-His monoclonal antibody and affinity chromatography was applied to purify the expressed protein. Results: The accuracy of the construct was confirmed by restriction map analysis and sequencing. The transformation of the construct into the BL21 (DE3), pLysS, and pLysE E. coli strains did not lead to any expression. The fusion protein was found to be toxic for E. coli DE3. By applying two steps inhibition, the fusion protein was successfully expressed in BL21 (AI) E. coli strain. Conclusion: The HBsAg-polytope fusion protein expressed in this study can be further evaluated for its immunogenicity in animal models. PMID:26682209

  19. Genomics Education for the Public: Perspectives of Genomic Researchers and ELSI Advisors

    PubMed Central

    Jones, Sondra Smolek; Markey, Janell M.; Byerly, Katherine W.; Roberts, Megan C.

    2014-01-01

    Aims: For more than two decades genomic education of the public has been a significant challenge. As genomic information becomes integrated into daily life and routine clinical care, the need for public education is even more critical. We conducted a pilot study to learn how genomic researchers and ethical, legal, and social implications advisors who were affiliated with large-scale genomic variation studies have approached the issue of educating the public about genomics. Methods/Results: Semi-structured telephone interviews were conducted with researchers and advisors associated with the SNP/HAPMAP studies and the Cancer Genome Atlas Study. Respondents described approach(es) associated with educating the public about their study. Interviews were audio-recorded, transcribed, coded, and analyzed by team review. Although few respondents described formal educational efforts, most provided recommendations for what should/could be done, emphasizing the need for an overarching entity(s) to take responsibility to lead the effort to educate the public. Opposing views were described related to: who this should be; the overall goal of the educational effort; and the educational approach. Four thematic areas emerged: What is the rationale for educating the public about genomics?; Who is the audience?; Who should be responsible for this effort?; and What should the content be? Policy issues associated with these themes included the need to agree on philosophical framework(s) to guide the rationale, content, and target audiences for education programs; coordinate previous/ongoing educational efforts; and develop a centralized knowledge base. Suggestions for next steps are presented. Conclusion: A complex interplay of philosophical, professional, and cultural issues can create impediments to genomic education of the public. Many challenges, however, can be addressed by agreement on a guiding philosophical framework(s) and identification of a responsible entity(s) to provide

  20. Visible light driven photocatalysis and antibacterial activity of AgVO{sub 3} and Ag/AgVO{sub 3} nanowires

    SciTech Connect

    Singh, Anamika; Dutta, Dimple P.; Ballal, A.; Tyagi, A.K.; Fulekar, M.H.

    2014-03-01

    Graphical abstract: - Highlights: • Ag/AgVO{sub 3} and pure AgVO{sub 3} nanowires synthesized by sonochemical process. • Characterization done using XRD, SEM, TEM, EDX and BET analysis. • Visible light degradation of RhB by Ag/AgVO{sub 3} within 45 min. • Antibacterial activity of Ag/AgVO{sub 3} demonstrated. - Abstract: Ag/AgVO{sub 3} nanowires and AgVO{sub 3} nanorods were synthesized in aqueous media via a facile sonochemical route. The as-synthesized products were characterized by X-ray diffraction, Brunauer–Emmett–Teller surface area analysis, scanning electron microscopy together with an energy dispersion X-ray spectrum analysis, transmission electron microscopy and UV–vis diffuse reflectance spectroscopy. The results revealed that inert atmosphere promotes the formation of Ag/AgVO{sub 3} nanowires. The photocatalytic studies revealed that the Ag/AgVO{sub 3} nanowires exhibited complete photocatalytic degradation of Rhodamine B within 45 min under visible light irradiation. The antibacterial activity of Ag/AgVO{sub 3} nanowires was tested against Escherechia coli and Bacillus subtilis. The minimum growth inhibitory concentration value was found to be 50 and 10 folds lower than for the antibiotic ciprofloxacin for E. coli and B. subtilis, respectively. The antibacterial properties of the β-AgVO{sub 3} nanorods prove that in case of the Ag dispersed Ag/AgVO{sub 3} nanowires, the enhanced antibacterial action is also due to contribution from the AgVO{sub 3} support.

  1. Demonstration and partial characterization of 22-nm HBsAg and Dane particles of subtype HBsAg/ady.

    PubMed

    Hess, G; Shih, J W; Arnold, W; Gerin, J L; zum Büschenfelde, K H

    1979-09-01

    The present paper describes the demonstration of d, y, w, and r HBsAg determinants in one serum. It was shown that there are two populations of HBsAg particles: HBsAg/ad and HBsAg/ady. All complete Dane particles were of subtype HBsAg/ady. Further characterization of HBsAg/ady particles did not reveal morphologic differences when they were compared with HBsAg/ad and HBsAg/ay particles. An HBsAg/ady phenotype may be the result of a double infection with hepatitis B viruses or exchanges of DNA sequences that determine HBsAg/ay and HBsAg/ad to form a new genotype. PMID:89163

  2. Highly luminescent Ag+ nanoclusters for Hg2+ ion detection

    NASA Astrophysics Data System (ADS)

    Yuan, Xun; Yeow, Teik Jin; Zhang, Qingbo; Lee, Jim Yang; Xie, Jianping

    2012-03-01

    A simple, low-cost and label-free Hg2+ ion sensor has been developed by using novel luminescent Ag+ nanoclusters (NCs) with an excellent optical property (quantum yield = 15%), an ultra-high ratio of active Ag+ species in the NC surface (~100%), and an ultra-short diffusion path length of Hg2+ ions to access the NC surface (~0.5 nm).A simple, low-cost and label-free Hg2+ ion sensor has been developed by using novel luminescent Ag+ nanoclusters (NCs) with an excellent optical property (quantum yield = 15%), an ultra-high ratio of active Ag+ species in the NC surface (~100%), and an ultra-short diffusion path length of Hg2+ ions to access the NC surface (~0.5 nm). Electronic supplementary information (ESI) available: Experimental details of the synthesis of b-Ag NCs; time-resolved evolution of photoemission spectra of the b-Ag NCs in toluene; photoexcitation spectrum of the b-Ag NCs in toluene; comparison of the luminescence of b-Ag NCs at different temperatures (4 and 25 °C) TEM image of the b-Ag NCs in toluene; optical properties of r-Ag NCs obtained by the reduction of b-Ag NCs in toluene; XPS spectra of b-Ag NCs, thiolate-Ag+ complexes, r-Ag NCs, and large Ag nanoparticles; TEM image of the Hg2+-Ag NCs; photostability of the b-Ag NCs; tolerance studies of the b-Ag NCs over other metal ions; tolerance studies of the b-Ag NCs over common thiol ligands (e.g., GSH) and anions; relative luminescence of the b-Ag NCs in different real water samples in the presence of Hg2+ ions; and relative luminescence of the b-Ag NCs in NaCl solution with different concentrations. See DOI: 10.1039/c2nr11999d

  3. Creating Open Education Resources for Teaching and Community Development through Action Research: An Overview of the Makerere AgShare Project

    ERIC Educational Resources Information Center

    Kaneene, John B.; Ssajjakambwe, Paul; Kisaka, Stevens; Miller, RoseAnn; Kabasa, John D.

    2013-01-01

    The AgShare Phase I Program, conducted at Makerere University, Kampala, Uganda, was formed to create open education resources for teaching and community development through action research. The study was conducted by an interdisciplinary team of investigators from fields of veterinary medicine and agri-business. Two master of science students…

  4. The AGS-Booster lattice

    SciTech Connect

    Lee, Y.Y.; Barton, D.S.; Claus, J.; Cottingham, J.G.; Courant, E.D.; Danby, G.T.; Dell, G.F.; Forsyth, E.B.; Gupta, R.C.; Kats, J.

    1987-01-01

    The AGS Booster has three objectives. They are to increase the space charge limit of the AGS, to increase the intensity of the polarized proton beam by accumulating many linac pulses (since the intensity is limited by the polarized ion source), and to reaccelerate heavy ions from the BNL Tandem Van de Graaff before injection into the AGS. The machine is capable of accelerating protons at 7.5 Hertz from 200 MeV to 1.5 GeV or to lower final energies at faster repetition rates. The machine will also be able to accelerate heavy ions from as low as 1 MeV/nucleon to a magnetic rigidity as high as 17.6 Tesla-meters with a one second repetition rate. As an accumulator for polarized protons, the Booster should be able to store the protons at 200 MeV for several seconds. We expect that the Booster will increase the AGS proton intensity by a factor of four, polarized proton intensity by a factor of twenty to thirty, and will also enable the AGS to accelerate all species of heavy ions (at present the AGS heavy ion program is limited to the elements lighter than sulfur because it can only accelerate fully stripped ions). The construction project started in FY 1985 and is expected to be completed in 1989. The purpose of this paper is to provide a future reference for the AGS Booster lattice.

  5. Studies on the electronic structure of Ag 2NiO 2, an intercalated delafossite containing subvalent silver

    NASA Astrophysics Data System (ADS)

    Wedig, Ulrich; Adler, Peter; Nuss, Jürgen; Modrow, Hartwig; Jansen, Martin

    2006-07-01

    Structural and electronic properties of Ag 2NiO 2 and AgNiO 2 were investigated and compared. Single crystal X-ray diffraction experiments on Ag 2NiO 2 at 100 K provide evidence for a ferrodistortive phase below 260 K. Ni K-edge and Ag L III-edge XANES spectra, both measured and simulated, as well as core level and valence band photoelectron spectra are analysed. They agree well with the results of bandstructure calculations, where pure DFT and mixed Hartree-Fock/DFT (hybrid) functionals were applied and spin-polarisation was considered. The electronic structure of the [NiO 2] - layers with Ni 3+ in a low spin state, forming a spin-1/2 triangular lattice, is very similar in both compounds. A ferrimagnetic alignment of the spins within the [NiO 2] - layers and their antiferromagnetic coupling via the intermediate silver layers is suggested.

  6. Hierarchically plasmonic photocatalysts of Ag/AgCl nanocrystals coupled with single-crystalline WO3 nanoplates

    NASA Astrophysics Data System (ADS)

    Chen, Deliang; Li, Tao; Chen, Qianqian; Gao, Jiabing; Fan, Bingbing; Li, Jian; Li, Xinjian; Zhang, Rui; Sun, Jing; Gao, Lian

    2012-08-01

    The hierarchical photocatalysts of Ag/AgCl@plate-WO3 have been synthesized by anchoring Ag/AgCl nanocrystals on the surfaces of single-crystalline WO3 nanoplates that were obtained via an intercalation and topochemical approach. The heterogeneous precipitation process of the PVP-Ag+-WO3 suspensions with a Cl- solution added drop-wise was developed to synthesize AgCl@WO3 composites, which were then photoreduced to form Ag/AgCl@WO3 nanostructures in situ. WO3 nanocrystals with various shapes (i.e., nanoplates, nanorods, and nanoparticles) were used as the substrates to synthesize Ag/AgCl@WO3 photocatalysts, and the effects of the WO3 contents and photoreduction times on their visible-light-driven photocatalytic performance were investigated. The techniques of TEM, SEM, XPS, EDS, XRD, N2 adsorption-desorption and UV-vis DR spectra were used to characterize the compositions, phases and microstructures of the samples. The RhB aqueous solutions were used as the model system to estimate the photocatalytic performance of the as-obtained Ag/AgCl@WO3 nanostructures under visible light (λ >= 420 nm) and sunlight. The results indicated that the hierarchical Ag/AgCl@plate-WO3 photocatalyst has a higher photodegradation rate than Ag/AgCl, AgCl, AgCl@WO3 and TiO2 (P25). The contents and morphologies of the WO3 substrates in the Ag/AgCl@plate-WO3 photocatalysts have important effects on their photocatalytic performance. The related mechanisms for the enhancement in visible-light-driven photodegradation of RhB molecules were analyzed.The hierarchical photocatalysts of Ag/AgCl@plate-WO3 have been synthesized by anchoring Ag/AgCl nanocrystals on the surfaces of single-crystalline WO3 nanoplates that were obtained via an intercalation and topochemical approach. The heterogeneous precipitation process of the PVP-Ag+-WO3 suspensions with a Cl- solution added drop-wise was developed to synthesize AgCl@WO3 composites, which were then photoreduced to form Ag/AgCl@WO3 nanostructures in

  7. An Electrochemical Framework to Explain Intergranular Stress Corrosion Cracking in an Al-5.4%Cu-0.5%Mg-0.5%Ag Alloy

    NASA Technical Reports Server (NTRS)

    Little, D. A.; Connolly, B. J.; Scully, J. R.

    2001-01-01

    A modified version of the Cu-depletion electrochemical framework was used to explain the metallurgical factor creating intergranular stress corrosion cracking susceptibility in an aged Al-Cu-Mg-Ag alloy, C416. This framework was also used to explain the increased resistance to intergranular stress corrosion cracking in the overaged temper. Susceptibility in the under aged and T8 condition is consistent with the grain boundary Cu-depletion mechanism. Improvements in resistance of the T8+ thermal exposure of 5000 h at 225 F (T8+) compared to the T8 condition can be explained by depletion of Cu from solid solution.

  8. 78 FR 16259 - Subcommittee Meeting of the Board of Advisors to the President, Naval Postgraduate School

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-14

    ... Advisors (BOA) to the Presidents of the Naval Postgraduate School and the Naval War College (NPS). This... meeting location. For access, information, or to send written comments regarding the NPS BOA contact...

  9. The App Squad: SLJ's Advisors Weigh in on Kids' Book Apps

    ERIC Educational Resources Information Center

    Ishizuka, Kathy

    2011-01-01

    In this article, "School Library Journal's" ("SLJ") advisors talk about book apps for kids. They discuss what they like, what one should look for in discerning the best for kids and teens, and where this all might be headed.

  10. Study on the fabrication of transparent electrodes by using a thermal-roll imprinted Ag mesh and anATO thin film

    NASA Astrophysics Data System (ADS)

    Kim, Sung Jin; Choi, Kyoon; Choi, Se Young

    2016-03-01

    Transparent conductive films have been widely studied because of their potential applications in optoelectronic devices such as paper displays, dye-sensitized solar cells (DSSCs), organic lighting-emitting diodes (OLEDs), organic solar cells and so on. In this paper, we report on a low-resistance, a high-transparents conductive film that can be applied as It a flexible device substrate. In order to the fabricate transparent conductive film, we used a high-resolution roll imprinting method. The following steps were performed: The design and manufacture of an electroforming stamp mold, the fabrication of high resolution roll imprinted on flexible film, and the manufacture of an Ag grid that was filled by using a doctor blade process with a nano-sized Ag paste. Then on patterned Its films, antimony tin oxide was coated with ATO sol solution by using bar the coating method. The fabricated ATO/Ag mesh electrode showed good flexibility, and It exhibited a high optical transmittance of 85.3% in the visible wavelength and a sheet resistance of 41 Ω/sq. Furthermore, the bending test for mechanical properties showed that the ATO/Ag thin film had good flexibility.

  11. Preparation, characterization, and photocatalytic activity of porous AgBr@Ag and AgBrI@Ag plasmonic photocatalysts

    NASA Astrophysics Data System (ADS)

    Yang, Fan; Tian, Baozhu; Zhang, Jinlong; Xiong, Tianqing; Wang, Tingting

    2014-02-01

    Porous AgBr@Ag and AgBrI@Ag plasmonic photocatalysts were synthesized by a multistep route, including a dealloying method to prepare porous Ag, a transformation from Ag to AgBr and AgBrI, and a photo-reduction process to form Ag nanoparticles on the surface of AgBr and AgBrI. It was found that the porous structure kept unchanged during Ag was transferred into AgBr, AgBrI, AgBr@Ag, and AgBrI@Ag. Both porous AgBr@Ag and porous AgBrI@Ag showed much higher visible-light photocatalytic activity than cubic AgBr@Ag for the degradation of methyl orange, which is because the interconnected pore channels not only provide more reactive sites but also favor the transportation of photo-generated electrons and holes. For AgBrI@Ag, AgBrI solid solution formed at the interface of AgBr and AgI, and the phase junction can effectively separate the photo-generated electrons and holes, favorable to the improvement of photocatalytic activity. The optimal I content for obtaining the highest activity is ∼10 at.%.

  12. Confessions of a President's Science Advisor (George B. Pegram Lecture Series)

    SciTech Connect

    Lane, Neal

    2006-09-11

    Former science advisor to president Bill Clinton Neal Lane briefly reviews the history of the job of Science Advisor to the President and give some examples of issues he had to deal with when he was in that position, including climate change, stem cell research, the human genome, nanotechnology and research funding. He will also give his opinions about the present and future state of science in the U.S.

  13. Structure and properties during aging of an Al-Cu-Li-Ag-Mg alloy, Weldalite (tm) 049

    NASA Technical Reports Server (NTRS)

    Gayle, Frank W.; Heubaum, Frank H.; Pickens, Joseph R.

    1991-01-01

    An Al-Cu-Li-Ag-Mg alloy, Weldalite (trademark) 049, was recently introduced as an ultra-high strength alloy (7000 MPa yield strength in artificially aged tempers) with good weldability. In addition, the alloy exhibits an extraordinary natural aging response (440 MPa yield strength (YS) in the unstretch condition) and a high ductility reversion condition which may be useful as a cold-forming temper. In contrast to other Al-Li alloys, these properties can essentially be obtained with or without a stretch or other coldworking operation prior to aging. Preliminary studies have revealed that the T4 temper (no stretch, natural age) is strengthened by a combination of GP zones and delta prime (Al3Li). The T6 temper (no stretch, aged at 180 C to peak strength) was reported to be strengthened primarily by T(sub 1) phase (Al2CuLi) with a minor presence of a theta prime like (Al2Cu) phase. On the other hand, a similar but lower solute containing alloy was reported to contain omega, (stoichiometry unknown), theta prime, and S prime in the peak strength condition. The purpose of this study is to further elucidate the strengthening phases in Weldalite (trademark) 049 in the unstretched tempers, and to follow the development of the microstructure from the T4 temper through reversion (180 C for 5 to 45 minutes) to the T6 temper.

  14. A localized and propagating SPR, and molecular imprinting based fiber-optic ascorbic acid sensor using an in situ polymerized polyaniline-Ag nanocomposite.

    PubMed

    Shrivastav, Anand M; Usha, Sruthi P; Gupta, Banshi D

    2016-08-26

    We report a successful approach for the fabrication and characterization of a fiber-optic sensor for ascorbic acid (AA) detection, using a molecularly imprinted polyaniline-Ag (PANI-Ag) nanocomposite layer based on the combined phenomena of surface plasmon resonance (SPR) and localized SPR (LSPR). The PANI-Ag nanocomposite is synthesized by an in situ polymerization process and AA imprints are prepared on the polymeric composite. The confirmation of the PANI-Ag nanocomposite and AA imprinting is performed using various characterization methods such as x-ray diffraction (XRD), UV-vis, Fourier transform infrared spectroscopy and scanning electron microscopy. From XRD, the size of Ag nanoparticles is analyzed. The absorbance spectra are recorded for samples of different concentrations of AA around the sensing region of the probe. An increase in peak absorbance wavelength with the increase in AA concentration is observed with a linear response for the concentration range from 10(-8) M to 10(-6) M. The sensor possesses a high sensitivity of 45.1 nm log(-1) M near an AA concentration of 10(-8) M. The limit of detection (LOD) and limit of quantification of the sensor are found to be 7.383 × 10(-11) M and 4.16 × 10(-10) M, respectively. The LOD of the sensor is compared to studies reported in the literature and is found to be the lowest. The sensor possesses several other advantages such as cost effectiveness, selectivity, and low response time (<5 s), along with abilities of remote sensing and online monitoring. PMID:27405256

  15. A localized and propagating SPR, and molecular imprinting based fiber-optic ascorbic acid sensor using an in situ polymerized polyaniline–Ag nanocomposite

    NASA Astrophysics Data System (ADS)

    Shrivastav, Anand M.; Usha, Sruthi P.; Gupta, Banshi D.

    2016-08-01

    We report a successful approach for the fabrication and characterization of a fiber-optic sensor for ascorbic acid (AA) detection, using a molecularly imprinted polyaniline–Ag (PANI–Ag) nanocomposite layer based on the combined phenomena of surface plasmon resonance (SPR) and localized SPR (LSPR). The PANI–Ag nanocomposite is synthesized by an in situ polymerization process and AA imprints are prepared on the polymeric composite. The confirmation of the PANI–Ag nanocomposite and AA imprinting is performed using various characterization methods such as x-ray diffraction (XRD), UV–vis, Fourier transform infrared spectroscopy and scanning electron microscopy. From XRD, the size of Ag nanoparticles is analyzed. The absorbance spectra are recorded for samples of different concentrations of AA around the sensing region of the probe. An increase in peak absorbance wavelength with the increase in AA concentration is observed with a linear response for the concentration range from 10‑8 M to 10‑6 M. The sensor possesses a high sensitivity of 45.1 nm log‑1 M near an AA concentration of 10‑8 M. The limit of detection (LOD) and limit of quantification of the sensor are found to be 7.383 × 10‑11 M and 4.16 × 10‑10 M, respectively. The LOD of the sensor is compared to studies reported in the literature and is found to be the lowest. The sensor possesses several other advantages such as cost effectiveness, selectivity, and low response time (<5 s), along with abilities of remote sensing and online monitoring.

  16. TiO2 nanotube composite layers as delivery system for ZnO and Ag nanoparticles - an unexpected overdose effect decreasing their antibacterial efficacy.

    PubMed

    Roguska, A; Belcarz, A; Pisarek, M; Ginalska, G; Lewandowska, M

    2015-06-01

    Enhancement of biocompatibility and antibacterial properties of implant materials is potentially beneficial for their practical value. Therefore, the use of metallic and metallic oxide nanoparticles as antimicrobial coatings components which induce minimized antibacterial resistance receives currently particular attention. In this work, TiO2 nanotubes layers loaded with ZnO and Ag nanoparticles were designed for biomedical coatings and delivery systems and evaluated for antimicrobial activity. TiO2 nanotubes themselves exhibited considerable and diameter-dependent antibacterial activity against planktonic Staphylococcus epidermidis cells but favored bacterial adhesion. Loading of nanotubes with moderate amount of ZnO nanoparticles significantly diminished S. epidermidis cell adhesion and viability just after 1.5h contact with modified surfaces. However, an increase of loaded ZnO amount unexpectedly altered the structure of nanoparticle-nanolayer, caused partial closure of nanotube interior and significantly reduced ZnO solubility and antibacterial efficacy. Co-deposition of Ag nanoparticles enhanced the antibacterial properties of synthesized coatings. However, the increase of ZnO quantity on Ag nanoparticles co-deposited surfaces favored the adhesion of bacterial cells. Thus, ZnO/Ag/TiO2 nanotube composite layers may be promising delivery systems for combating post-operative infections in hard tissue replacement procedures. However, the amount of loaded antibacterial agents must be carefully balanced to avoid the overdose and reduced efficacy. PMID:25842121

  17. Dynamic Mechanisms of the Bactericidal Action of an Al2O3-TiO2-Ag Granular Material on an Escherichia coli Strain

    PubMed Central

    Tartanson, Marie-Anne; Rivallin, Matthieu; Pecastaings, Sophie; Chis, Cristian V.; Penaranda, Diego; Roques, Christine; Faur, Catherine

    2015-01-01

    The bactericidal activity of an Al2O3-TiO2-Ag granular material against an Escherichia coli strain was confirmed by a culture-based method. In particular, 100% of microorganisms were permanently inactivated in 30 to 45 min. The present work aimed to investigate the mechanisms of the bactericidal action of this material and their dynamics on Escherichia coli using different techniques. Observations by transmission electron microscopy (TEM) at different times of disinfection revealed morphological changes in the bacteria as soon as they were put in contact with the material. Notably highlighted were cell membrane damage; cytoplasm detachment; formation of vacuoles, possibly due to DNA condensation, in association with regions exhibiting different levels of electron density; and membrane lysis. PCR and flow cytometry analyses were used to confirm and quantify the observations of cell integrity. The direct exposure of cells to silver, combined with the oxidative stress induced by the reactive oxygen species (ROS) generated, was identified to be responsible for these morphological alterations. From the first 5 min of treatment with the Al2O3-TiO2-Ag material, 98% of E. coli isolates were lysed. From 30 min, cell viability decreased to reach total inactivation, although approximately 1% of permeable E. coli cells and 1% of intact cells (105 genomic units · ml−1) were evidenced. This study demonstrates that the bactericidal effect of the material results from a synergic action of desorbed and supported silver. Supported silver was shown to generate the ROS evidenced. PMID:26253665

  18. NMR investigation of Ag nanoparticles

    NASA Astrophysics Data System (ADS)

    Son, Kwanghyo; Jang, Zeehoon

    2013-01-01

    109Ag nuclear magnetic resonance (NMR) and relaxation measurements have been performed on two powder samples of Ag nanoparticles with average sizes of 20 nm and 80 nm. The measurements have been done in an external field of 9.4 T and in the temperature range 10 K < T < 280 K. The 109Ag NMR spectra for both samples have close to Lorentzian shapes and turn out to be mixtures of homogeneous and inhomogeneous lines. The linewidth Δ ν at room temperature is 1.3 kHz for both samples and gradually increases with decreasing temperature. Both the Knight shift ( K) and the nuclear spin-lattice relaxation rate (1/ T 1) are observed to be almost identical to the values reported for the bulk Ag metal, whereby the Korringa ratio R(= K 2 T 1 T/S) is found to be 2.0 for both samples in the investigated temperature range.

  19. AGS preinjector improvement

    SciTech Connect

    Alessi, J.G.; Brennan, J.M.; Brown, H.N.; Brodowski, J.; Gough, R.; Kponou, A.; Prelec, K.; Staples, J.; Tanabe, J.; Witkover, R.

    1987-01-01

    In 1984, a polarized H/sup -/ source was installed to permit the acceleration of polarized protons in the AGS, using a low current, 750 keV RFQ Linear Accelerator as the preinjector. This RFQ was designed by LANL and has proved to be quite satisfactory and reliable. In order to improve the reliability and simplify maintenance of the overall AGS operations, it has been decided to replace one of the two 750 keV Cockcroft-Waltons (C-W) with an RFQ. The design of a new high current RFQ has been carried out by LBL and is also being constructed there. This paper describes the preinjector improvement project, centered around that RFQ, which is underway at BNL.

  20. Wind Technology Modeling Within the System Advisor Model (SAM) (Poster)

    SciTech Connect

    Blair, N.; Dobos, A.; Ferguson, T.; Freeman, J.; Gilman, P.; Whitmore, J.

    2014-05-01

    This poster provides detail for implementation and the underlying methodology for modeling wind power generation performance in the National Renewable Energy Laboratory's (NREL's) System Advisor Model (SAM). SAM's wind power model allows users to assess projects involving one or more large or small wind turbines with any of the detailed options for residential, commercial, or utility financing. The model requires information about the wind resource, wind turbine specifications, wind farm layout (if applicable), and costs, and provides analysis to compare the absolute or relative impact of these inputs. SAM is a system performance and economic model designed to facilitate analysis and decision-making for project developers, financers, policymakers, and energy researchers. The user pairs a generation technology with a financing option (residential, commercial, or utility) to calculate the cost of energy over the multi-year project period. Specifically, SAM calculates the value of projects which buy and sell power at retail rates for residential and commercial systems, and also for larger-scale projects which operate through a power purchase agreement (PPA) with a utility. The financial model captures complex financing and rate structures, taxes, and incentives.

  1. System Advisor Model, SAM 2014.1.14: General Description

    SciTech Connect

    Blair, N.; Dobos, A. P.; Freeman, J.; Neises, T.; Wagner, M.; Ferguson, T.; Gilman, P.; Janzou, S.

    2014-02-01

    This document describes the capabilities of the U.S. Department of Energy and National Renewable Energy Laboratory's System Advisor Model (SAM), Version 2013.9.20, released on September 9, 2013. SAM is a computer model that calculates performance and financial metrics of renewable energy systems. Project developers, policy makers, equipment manufacturers, and researchers use graphs and tables of SAM results in the process of evaluating financial, technology, and incentive options for renewable energy projects. SAM simulates the performance of photovoltaic, concentrating solar power, solar water heating, wind, geothermal, biomass, and conventional power systems. The financial model can represent financial structures for projects that either buy and sell electricity at retail rates (residential and commercial) or sell electricity at a price determined in a power purchase agreement (utility). SAM's advanced simulation options facilitate parametric and sensitivity analyses, and statistical analysis capabilities are available for Monte Carlo simulation and weather variability (P50/P90) studies. SAM can also read input variables from Microsoft Excel worksheets. For software developers, the SAM software development kit (SDK) makes it possible to use SAM simulation modules in their applications written in C/C++, C#, Java, Python, and MATLAB. NREL provides both SAM and the SDK as free downloads at http://sam.nrel.gov. Technical support and more information about the software are available on the website.

  2. Detailed Physical Trough Model for NREL's Solar Advisor Model: Preprint

    SciTech Connect

    Wagner, M. J.; Blair, N.; Dobos, A.

    2010-10-01

    Solar Advisor Model (SAM) is a free software package made available by the National Renewable Energy Laboratory (NREL), Sandia National Laboratory, and the US Department of Energy. SAM contains hourly system performance and economic models for concentrating solar power (CSP) systems, photovoltaic, solar hot-water, and generic fuel-use technologies. Versions of SAM prior to 2010 included only the parabolic trough model based on Excelergy. This model uses top-level empirical performance curves to characterize plant behavior, and thus is limited in predictive capability for new technologies or component configurations. To address this and other functionality challenges, a new trough model; derived from physical first principles was commissioned to supplement the Excelergy-based empirical model. This new 'physical model' approaches the task of characterizing the performance of the whole parabolic trough plant by replacing empirical curve-fit relationships with more detailed calculations where practical. The resulting model matches the annual performance of the SAM empirical model (which has been previously verified with plant data) while maintaining run-times compatible with parametric analysis, adding additional flexibility in modeled system configurations, and providing more detailed performance calculations in the solar field, power block, piping, and storage subsystems.

  3. System Advisor Model, SAM 2011.12.2: General Description

    SciTech Connect

    Gilman, P.; Dobos, A.

    2012-02-01

    This document describes the capabilities of the U.S. Department of Energy and National Renewable Energy Laboratory's System Advisor Model (SAM), Version 2011.12.2, released on December 2, 2011. SAM is software that models the cost and performance of renewable energy systems. Project developers, policy makers, equipment manufacturers, and researchers use graphs and tables of SAM results in the process of evaluating financial, technology, and incentive options for renewable energy projects. SAM simulates the performance of solar, wind, geothermal, biomass, and conventional power systems. The financial model can represent financing structures for projects that either buy and sell electricity at retail rates (residential and commercial) or sell electricity at a price determined in a power purchase agreement (utility). Advanced analysis options facilitate parametric, sensitivity, and statistical analyses, and allow for interfacing SAM with Microsoft Excel or with other computer programs. SAM is available as a free download at http://sam.nrel.gov. Technical support and more information about the software are available on the website.

  4. Enhancement of the visible light activity and stability of Ag2CO3 by formation of AgI/Ag2CO3 heterojunction

    NASA Astrophysics Data System (ADS)

    Yu, Changlin; Wei, Longfu; Zhou, Wanqin; Chen, Jianchai; Fan, Qizhe; Liu, Hong

    2014-11-01

    An insurmountable problem for silver-based semiconductor photocatalysts is their poor stability. Here, at room temperature, AgI with different concentrations (5%, 10%, 20% and 30%) were coupled into Ag2CO3, producing a series of novel AgI/Ag2CO3 composite photocatalysts. The effects of AgI addition on the Ag2CO3 catalyst for photocatalytic degradation of methyl orange (MO) under visible light irradiation have been investigated. Some physicochemical technologies like N2 physical adsorption/desorption, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectroscopy (UV-vis DRS) were applied to characterize these products. Results show that the photocatalytic degradation activity of AgI/Ag2CO3 photocatalyst is much higher than that of pure AgI and Ag2CO3. With the optimal content of AgI (20 wt%), the AgI/Ag2CO3 exhibits the highest photocatalytic degradation efficiency. Its first order reaction rate constant (0.54 h-1) is 20 times of that of AgI (0.026 h-1) and 3.6 times of that of Ag2CO3 (0.15 h-1). The characterizations and theory calculation show that AgI and Ag2CO3 have suitably matched band gap structures. The formation of AgI/Ag2CO3 heterojunction with intimate interface could effectively increase the separation efficiency of the e-/h+ pairs and promote the production of •OH and O2•- radicals, which brings about the fast degradation rate of the dye and an increase in photocatalytic stability.

  5. Multifunctional nanotube-like Fe3O4/PANI/CDs/Ag hybrids: An efficient SERS substrate and nanocatalyst.

    PubMed

    Yan, Manqing; Shen, Yang; Zhang, Guiyang; Bi, Hong

    2016-01-01

    In this paper, the stable and environment-friendly Fe3O4 nanotubes with polyaniline (Fe3O4 NTs/PANI hybrids) have been prepared via mesoporous anodic alumina oxide (AAO) template, sol-gel method and in-situ polymerization. Then multifunctional Fe3O4 NTs/PANI/Ag hybrids have been obtained by decorating Ag nanoparticles by glucose reduction on surface of Fe3O4 NTs/PANI hybrids. The morphologies and structures of these hybrids were subsequently investigated by SEM, XRD, TEM and XPS measurements. The Fe3O4 NTs/PANI/Ag hybrids presented high catalytic activity due to the template-assisted presence, preventing Ag particulate agglomeration. Importantly, the Fe3O4 NTs/PANI/Ag hybrids achieve sensitive surface-enhanced Raman scattering (SERS) signals. Furthermore, the introduction of carbon dots (CDs) endows these hybrids good dispersion and stable photoluminescence (PL). Therefore, the obtained hybrids may have potential applications in waste water treatment, biomedicine, photocatalyst, and environmental analysis. PMID:26478345

  6. DFT and TD-DFT assessment of the structural and optoelectronic properties of an organic-Ag14 nanocluster.

    PubMed

    Muniz-Miranda, Francesco; Menziani, Maria Cristina; Pedone, Alfonso

    2015-05-28

    An extensive benchmark of exchange-correlation functionals on the structure of the X-ray resolved phosphine and thiolate-protected Ag14-based nanocluster, named XMC1, is reported. Calculations were performed both on simplified model systems, with the complexity of the ligands greatly reduced, and on the complete XMC1 particle. Most of the density functionals that yielded good relaxed structures on analogous calculations on gold nanoclusters (viz. those employing the generalized gradient approximation) significantly deform the structure of XMC1. On the contrary, some of the exchange-correlation functionals including part of the exact Hartree-Fock exchange (hybrid functionals) reproduce the experimental geometry with minimal errors. In particular, the widely adopted B3LYP yields fairly accurate structures for XMC1, whereas it is outperformed by many other functionals (both hybrids and generalized gradient corrected) in similar calculations on analogous gold-based systems. Time-dependent density functional calculations have been employed to recover the experimental UV-vis spectrum. The present investigation shows that to correctly reproduce the optical feature of XMC1 the ligands cannot be omitted, because they interact with the metal core at energies much closer to the optical gap than in the case of gold-based nanoclusters of similar sizes. Due to this fact, a functional that accurately describes charge-transfer electronic transitions (such as the long-range corrected CAM-B3LYP) has to be adopted. PMID:25248052

  7. Association of hepatitis Be antigen (HBeAg) with the core of the hepatitis B virus (HBcAg).

    PubMed

    Slusarczyk, J; Hess, G; Meyer zum Büschenfelde, K H

    1985-02-01

    Three substances (pronase E, sodium dodecylsulfate (SDS) and guanidine hydrochloride) with different chemical actions partially convert HBcAg to HBeAg. This process retains the integrity of the HBcAg particle, which was not different between HBcAg subpopulations, and does not generate HBcAg or HBeAg sub-units. DNA polymerase activity was destroyed by SDS and guanidine hydrochloride, but not by pronase E. Serum HBeAg could not be converted into HBcAg, suggesting that this might be an irreversible process. The data are consistent with the assumption that HBcAg and HBeAg are coded for by the same gene (C gene of the HBV-DNA). PMID:3982243

  8. Study of the oxygen transport through Ag (110), Ag (poly), and Ag 2.0 Zr

    NASA Technical Reports Server (NTRS)

    Outlaw, R. A.; Wu, D.; Davidson, M. R.; Hoflund, Gar B.

    1992-01-01

    The transport of oxygen through high-purity membranes of Ag (110), Ag (poly), Ag (nano), and Ag 2.0 Zr has been studied by an ultrahigh vacuum permeation method over the temperature range of 400-800 C. The data show that there are substantial deviations from ordinary diffusion-controlled transport. A surface limitation has been confirmed by glow-discharge studies where the upstream O2 supply has been partially converted to atoms, which, for the same temperature and pressure, gave rise to over an order of magnitude increase in transport flux. Further, the addition of 2.0 wt percent Zr to the Ag has provided increased dissociative adsorption rates, which, in turn, increased the transport flux by a factor of 2. It was also observed that below a temperature of 630 C, the diffusivity exhibits an increase in activation energy of over 4 kcal/mol, which has been attributed to trapping of the atomic oxygen and/or kinetic barriers at the surface and subsurface of the vacuum interface. Above 630 C, the activation barrier decreases to the accepted value of about 11 kcal/mol for Ag (poly), consistent with zero concentration at the vacuum interface.

  9. Revisiting structure and dynamics of Ag+ in 18.6% aqueous ammonia: An ab initio quantum mechanical charge field simulation

    NASA Astrophysics Data System (ADS)

    Prasetyo, Niko; Armunanto, Ria

    2016-05-01

    Structures and dynamics of Ag+ in 18.6% aqueous ammonia have been studied using Quantum Mechanical Charge Field Molecular Dynamics (QMCF-MD) simulation at the Hartree-Fock (HF) level theory employing LANL2DZ ECP basis set for Ag+ and Dunning DZP for solvent molecules. Structural properties are in excellent agreement with previous QM/MM and experiments studies. [Ag(NH3)2(H2O)3]+ was found as dominant species during simulation time. For 20 ps of simulation time, a labile first solvation shell was observed with both fast ammonia and water ligands exchanges. QMCF-MD framework describes first solvation shell more labile than conventional QM/MM MD simulation.

  10. Genetic effect of an A/G polymorphism in the HSP70 gene on thermotolerance in chicken.

    PubMed

    Chen, Z Y; Zhang, W W; Gan, J K; Kong, L N; Zhang, X Q; Zhang, D X; Luo, Q B

    2016-01-01

    Studying thermotolerance is important for the prevention of thermostress in chickens. This study aimed to analyze the effect of mutations in the heat shock protein 70 (HSP70) gene on chicken thermotolerance. The C.-69A>G SNP in the 5'-flanking region of the HSP70 gene was genotyped in Lingshan and White Recessive Rock (WRR) chickens. Association of this SNP with thermotolerance traits revealed it to be significantly associated with CD4+/CD8+, and potentially associated with heterophil-to-lymphocyte ratio in WRR chickens exposed to thermoneutral temperature (15°C). Online prediction detected a putative myeloid zinc finger protein 1 binding factor in the C.-69A>G mutation. Under acute thermostress, mRNA levels of HSP70 in individuals with different C.-69A>G genotypes varied in the heart, leg muscle, and liver tissues. The HSP70 protein was expressed at higher levels in individuals with the GG genotype than in those with the AA genotype. In heart and liver, protein expression of HSP70 in individuals with the GG genotype was significantly higher than in those with the AA genotype. In leg muscle, protein expression was higher in birds with the GG genotype than in those with the AA and AG genotypes. Luciferase activity of the GG genotype was significantly higher than that of the AA genotype, suggesting that the C.-69A>G SNP regulates HSP70 gene expression. These results indicate that the C.-69A>G SNP in the 5'-flanking region of the HSP70 gene might affect chicken thermotolerance and that the GG genotype might be advantageous for the prevention of thermostress. PMID:27421010

  11. Ternary Ag/epoxy adhesive with excellent overall performance.

    PubMed

    Ji, Yan-Hong; Liu, Yu; Huang, Gui-Wen; Shen, Xiao-Jun; Xiao, Hong-Mei; Fu, Shao-Yun

    2015-04-22

    Excellent electrical conductivity (EC) generally conflicts with high lap shear strength (LSS) for electrically conductive adhesives (ECAs) since EC increases while LSS decreases with increasing conductive filler content. In this work, the ECAs with the excellent overall performance are developed based on the ternary hybrid of Ag microflakes (Ag-MFs), Ag nanospheres (Ag-NSs), and Ag nanowires (Ag-NWs). First, a low silver content adhesive system is determined. Then, the effects of the relative contents of Ag fillers on the EC and the LSS are studied. It is shown that a small amount of Ag-NSs or Ag-NWs can dramatically improve the EC for the Ag-MF/epoxy adhesives. The Ag-NSs and Ag-NWs with appropriate contents have a synergistic effect in improving the EC. Meanwhile, the LSS of the as-prepared adhesive with the appropriate Ag contents reaches an optimal value. Both the EC and the LSS of the as-prepared ternary hybrid ECA with a low content of 40 wt % Ag are higher than those of the commercial ECAs filled with the Ag-MF content over 60 wt %. Finally, the ternary hybrid ECA with the optimal formulation is shown to be promising for printing the radio frequency identification tag antennas as an immediate application example. PMID:25835391

  12. Studies on electronic structure of interfaces between Ag and gelatin for stabilization of Ag nanoparticles

    NASA Astrophysics Data System (ADS)

    Tani, Tadaaki; Uchida, Takayuki

    2015-06-01

    Extremely high stability of Ag nanoparticles in photographic materials has forced us to study the electronic structures of the interfaces between thin layers of Ag, Au, and Pt and their surface membranes in ambient atmosphere by photoelectron yield spectroscopy in air and Kelvin probe method. Owing to the Fermi level equalization between a metal layer and a membrane coming from air, the electron transfer took place from the membrane to Pt and Au layers and from an Ag layer to the membrane, giving the reason for poor stability of Ag nanoparticles in air. The control of the Fermi level of an Ag layer with respect to that of a gelatin membrane in air could be widely made according to Nernst’s equation by changing the pH and pAg values of an aqueous gelatin solution used to form the membrane, and thus available to stabilize Ag nanoparticles in a gelatin matrix.

  13. Booster-to-AGS Multiwires and an Evolution of the Application Profile Display

    SciTech Connect

    Ahrens,L.

    2008-07-01

    Follow up on BtA multiwire beam measurements taken during the 2008 polarized proton run has led to a number of better understandings (for the author) associated with the beam instrumentation involved. This history will be reviewed--some 'beam-based' results noted--and the present state of the application for these monitors described. The BtA multiwire system seems to be fundamentally an excellent diagnostic for allowing us to get the BtA line well under control in a defendable way. When beam is available in BtA, carrying out some systematic measurements with the system can get us there.

  14. Latino men’s qualitative perspectives on a lay health advisor intervention to promote their sexual health

    PubMed Central

    Wagoner, Kim G.; Downs, Mario; Alonzo, Jorge; Daniel-Ulloa, Jason; Rhodes, Scott D.

    2014-01-01

    Lay health advisor (LHA) approaches are a promising strategy to reduce health disparities among communities considered “hard to reach” by researchers and practitioners. LHAs have addressed a variety of health issues, but limited studies have included men as LHAs. The purpose of this to study was to better understand the roles of male LHAs and their male-helping relationships. We used an inductive approach to explore Latino men’s perspectives on serving as LHAs for other Latino men and Latino men’s views on receiving sexual health information from a male LHA. We collected qualitative data in 2009 and 2010 as part of an LHA intervention designed to reduce the risk of HIV infection among immigrant Latinos through the social networks of soccer teams. We analyzed and interpreted data from 30 in-depth interviews with Latino men who served as LHAs and their social networks in North Carolina, USA. Participants shared perceptions on social network importance for immigrant Latinos, facilitators and challenges of helping other men, recommendations for intervention modification, and suggestions for future work involving the Latino community. Findings revealed that Latino men are receptive to fulfilling the roles of health advisors and opinion leaders and can effectively serve as LHAs. Social network members valued the social support they received. Working through sports teams and identifying existing leaders to be LHAs may be a culturally congruent approach to meeting Latino community needs. More research is needed on the potential of male LHAs to address other health issues. PMID:25475213

  15. Thermoelectric device including an alloy of GeTe and AgSbTe as the P-type element

    DOEpatents

    Skrabek, Emanuel Andrew; Trimmer, Donald Smith

    1976-01-01

    Improved alloys suitable for thermoelectric applications and having the general formula: (AgSbTe.sub.2).sub.1.sub.-x + (GeTe).sub.x wherein x has a value of about 0.80 and 0.85, have been found to possess unexpectedly high thermoelectric properties such as efficiency index, as well as other improved physical properties.

  16. A Comparison of AH6 AG Scores and GCE Examinations Taken after an Interval of One Year

    ERIC Educational Resources Information Center

    Heim, A. W.; And Others

    1972-01-01

    GCE O-and A-level examinations were correlated with the AH6 AG test scores obtained a year earlier. Results suggest that the predictive value of AH6 for success in individual subjects is almost as high as when the examinations and testing were taken within a few weeks of each other. (Authors/CB)

  17. Studies of H2O on beta-AgI surfaces - An effective pair potential model. [molecular adsorption for ice nucleation

    NASA Technical Reports Server (NTRS)

    Hale, B. N.; Kiefer, J.

    1980-01-01

    The adsorption of a water molecule on surfaces of beta-AgI, the hexagonal crystal believed to be primarily responsible for the ice-nucleating properties of AgI, is studied on the basis of an effective pair potential model. The water molecule is represented by a rigid point charge ST-2 model and the AgI substrate by an array of point atoms, and maximal binding energy surfaces and optimal H2O configurations are generated for the water molecule adsorbed on the rigid and unrelaxed basal and prism faces. Modeling of H2O adsorption above a two-layer ledge, an iodine vacancy and an H2O molecule trapped in the vacancy indicates that H2O adsorption is favored at interstitial sites where no substrate atoms lie directly below. The prism face is found to attract the water molecule more strongly and provide larger energy barriers to surface diffusion than basal face sites, with the ideal basal faces providing hexagonal patterns of adsorption sites for the H2O with preferred dipole moments aligned.

  18. Locking-to-unlocking system is an efficient strategy to design DNA/silver nanoclusters (AgNCs) probe for human miRNAs

    PubMed Central

    Shah, Pratik; Choi, Suk Won; Kim, Ho-jin; Cho, Seok Keun; Bhang, Yong-Joo; Ryu, Moon Young; Thulstrup, Peter Waaben; Bjerrum, Morten Jannik; Yang, Seong Wook

    2016-01-01

    MicroRNAs (miRNAs), small non-coding RNA molecules, are important biomarkers for research and medical purposes. Here, we describe the development of a fast and simple method using highly fluorescent oligonucleotide-silver nanocluster probes (DNA/AgNCs) to efficiently detect specific miRNAs. Due to the great sequence diversity of miRNAs in humans and other organisms, a uniform strategy for miRNA detection is attractive. The concept presented is an oligonucleotide-based locking-to-unlocking system that can be endowed with miRNA complementarity while maintaining the same secondary structure. The locking-to-unlocking system is based on fold-back anchored DNA templates that consist of a cytosine-rich loop for AgNCs stabilization, an miRNA recognition site and an overlap region for hairpin stabilization. When an miRNA is recognized, fluorescence in the visible region is specifically extinguished in a concentration-dependent manner. Here, the exact composition of the fold-back anchor for the locking-to-unlocking system has been systematically optimized, balancing propensity for loop-structure formation, encapsulation of emissive AgNCs and target sensitivity. It is demonstrated that the applied strategy successfully can detect a number of cancer related miRNAs in RNA extracts from human cancer cell lines. PMID:26681688

  19. Locking-to-unlocking system is an efficient strategy to design DNA/silver nanoclusters (AgNCs) probe for human miRNAs.

    PubMed

    Shah, Pratik; Choi, Suk Won; Kim, Ho-Jin; Cho, Seok Keun; Bhang, Yong-Joo; Ryu, Moon Young; Thulstrup, Peter Waaben; Bjerrum, Morten Jannik; Yang, Seong Wook

    2016-04-01

    MicroRNAs (miRNAs), small non-coding RNA molecules, are important biomarkers for research and medical purposes. Here, we describe the development of a fast and simple method using highly fluorescent oligonucleotide-silver nanocluster probes (DNA/AgNCs) to efficiently detect specific miRNAs. Due to the great sequence diversity of miRNAs in humans and other organisms, a uniform strategy for miRNA detection is attractive. The concept presented is an oligonucleotide-based locking-to-unlocking system that can be endowed with miRNA complementarity while maintaining the same secondary structure. The locking-to-unlocking system is based on fold-back anchored DNA templates that consist of a cytosine-rich loop for AgNCs stabilization, an miRNA recognition site and an overlap region for hairpin stabilization. When an miRNA is recognized, fluorescence in the visible region is specifically extinguished in a concentration-dependent manner. Here, the exact composition of the fold-back anchor for the locking-to-unlocking system has been systematically optimized, balancing propensity for loop-structure formation, encapsulation of emissive AgNCs and target sensitivity. It is demonstrated that the applied strategy successfully can detect a number of cancer related miRNAs in RNA extracts from human cancer cell lines. PMID:26681688

  20. Facile synthesis of S-Ag nanocomposites and Ag2S short nanorods by the interaction of sulfur with AgNO3 in PEG400.

    PubMed

    Zhang, Yan-Li; Xie, Xin-Yuan; Liang, Ming; Xie, Shu-Ming; Chen, Jie-Mei; Zheng, Wen-Jie

    2016-06-01

    A facile, eco-friendly and inexpensive method to prepare Ag2S short nanorods and S-Ag nanocomposites using sublimed sulfur, AgNO3, PVP and PEG400 was studied. According to x-ray diffraction and scanning electron microscopy of the Ag2S, the products are highly crystalline and pure Ag2S nanorods with diameters of 70-160 nm and lengths of 200-360 nm. X-ray diffraction of the S-Ag nanocomposites shows that we obtained cubic Ag and S nanoparticles. Transmission electron microscopy shows that the molar ratio of PVP to Ag(+) plays an important role in controlling the size and morphology of the S-Ag nanocomposites. When the molar ratio of PVP to Ag(+) was 10:1, smaller sizes, better dispersibility and narrower distribution of S-Ag nanocomposites with diameters of 10-40 nm were obtained. The formation mechanism of the S-Ag nanocomposites was studied by designing a series of experiments using ultraviolet-visible measurement, and it was found that S nanoparticles are produced first and act as seed crystals; then Ag(+) becomes Ag nanocrystals on the surfaces of the S nanoparticles by the reduction of PVP. PEG400 acts as a catalyzer, accelerating the reaction rate, and protects the S-Ag nanocomposites from reacting to produce Ag2S. The antimicrobial experiments show that the S-Ag nanocomposites have greater antimicrobial activity on Staphylococcus aureus, Aspergillus niger and blue mold than Ag nanoparticles. PMID:27109417

  1. The cardiovascular response to the AGS

    NASA Technical Reports Server (NTRS)

    Cardus, David; Mctaggart, Wesley G.

    1993-01-01

    This paper reports the preliminary results of experiments on human subjects conducted to study the cardiovascular response to various g-levels and exposure times using an artificial gravity simulator (AGS). The AGS is a short arm centrifuge consisting of a turntable, a traction system, a platform and four beds. Data collection hardware is part of the communication system. The AGS provides a steep acceleration gradient in subjects in the supine position.

  2. Position-dependent property of resonant dipole—dipole interaction mediated by localized surface plasmon of an Ag nanosphere

    NASA Astrophysics Data System (ADS)

    Xu, Dan; Wang, Xiao-Yun; Huang, Yong-Gang; Ouyang, Shi-Liang; He, Hai-Long; He, Hao

    2015-02-01

    We use the photon Green-function method to study the quantum resonant dipole-dipole interaction (RDDI) induced by an Ag nanosphere (ANP). As the distance between the two dipoles increases, the RDDI becomes weaker, which is accompanied by the influence of the higher-order mode of the ANP on RDDI declining more quickly than that of the dipole mode. Across a broad frequency range (above 0.05 eV), the transfer rate of the RDDI is nearly constant since the two dipoles are fixed at the proper position. In addition, this phenomenon still exists for slightly different radius of the ANPs. We find that the frequency corresponding to the maximum transfer rate of RDDI exhibits a monotonic decrease by moving away one dipole as the other dipole and the ANP are kept fixed. In addition, the radius of ANP has little effect on this. When the two dipoles are far from the ANP, the maximum transfer rate of the RDDI takes place at the frequency of the dipole mode. In contrast, when the two dipoles are close to the ANP, the higher-order modes come into effect and they will play a leading role in the RDDI if they match the transition frequency of the dipole. Our results may be used in a biological detector and have a certain guiding significance for further application. Project supported by the National Natural Science Foundation of China (Grant Nos. 11347215, 11464014, and 11104113), the Natural Science Foundation of Hunan Province, China (Grant Nos. 13JJ6059 and 13JJB015), and the Natural Science Foundation of Education Department of Hunan Province, China (Grant Nos. 13C750 and 13B091).

  3. Experimental partitioning studies near the Fe-FeS eutectic, with an emphasis on elements important to iron meteorite chronologies (Pb, Ag, Pd, and Tl)

    NASA Technical Reports Server (NTRS)

    Jones, J. H.; Hart, S. R.; Benjamin, T. M.

    1993-01-01

    Partitioning coefficients for metal/sulfide liquid, troilite/sulfide liquid, and schreibersite/sulfide liquid were determined for Ag, Au, Mo, Ni, Pd, and Tl (using EMPA and proton-induced X-ray microprobe and ion microprobe analyses) in order to understand the chronometer systems of iron meteorites. In general, the obtained schreibersite/metal and troilite/metal partition coefficients for 'compatible' elements were quite similar to those inferred from natural assemblages, reinforcing an earlier made conclusion that there is a class of elements for which experimental troilite/metal and schreibersite/metal partition coefficients approximate those inferred from natural samples. The consistency between experimental and natural assemblages, however, was not observed for Ag, Pb, and Tl, indicating that the abundances of these elements determined in 'metal' and 'troilite' separates from iron meteorites are influenced by trace minerals that concentrate incompatible elements.

  4. AgPO2F2 and Ag9(PO2F2)14: the first Ag(i) and Ag(i)/Ag(ii) difluorophosphates with complex crystal structures.

    PubMed

    Malinowski, Przemysław J; Kurzydłowski, Dominik; Grochala, Wojciech

    2015-12-01

    The reaction of AgF2 with P2O3F4 yields a mixed valence Ag(I)/Ag(II) difluorophosphate salt with AgAg(PO2F2)14 stoichiometry - the first Ag(ii)-PO2F2 system known. This highly moisture sensitive brown solid is thermally stable up to 120 °C, which points at further feasible extension of the chemistry of Ag(ii)-PO2F2 systems. The crystal structure shows a very complex bonding pattern, comprising of polymeric Ag(PO2F2)14(4-) anions and two types of Ag(I) cations. One particular Ag(II) site present in the crystal structure of Ag9(PO2F2)14 is the first known example of square pyramidal penta-coordinated Ag(ii) in an oxo-ligand environment. Ag(i)PO2F2 - the product of the thermal decomposition of Ag9(PO2F2)14 - has also been characterized by thermal analysis, IR spectroscopy and X-ray powder diffraction. It has a complicated crystal structure as well, which consists of infinite 1D [Ag(I)O4/2] chains which are linked to more complex 3D structures via OPO bridges. The PO2F2(-) anions bind to cations in both compounds as bidentate oxo-ligands. The terminal F atoms tend to point inside the van der Waals cavities in the crystal structure of both compounds. All important structural details of both title compounds were corroborated by DFT calculations. PMID:26200921

  5. Dynamic Mechanisms of the Bactericidal Action of an Al2O3-TiO2-Ag Granular Material on an Escherichia coli Strain.

    PubMed

    Tartanson, Marie-Anne; Soussan, Laurence; Rivallin, Matthieu; Pecastaings, Sophie; Chis, Cristian V; Penaranda, Diego; Roques, Christine; Faur, Catherine

    2015-10-01

    The bactericidal activity of an Al2O3-TiO2-Ag granular material against an Escherichia coli strain was confirmed by a culture-based method. In particular, 100% of microorganisms were permanently inactivated in 30 to 45 min. The present work aimed to investigate the mechanisms of the bactericidal action of this material and their dynamics on Escherichia coli using different techniques. Observations by transmission electron microscopy (TEM) at different times of disinfection revealed morphological changes in the bacteria as soon as they were put in contact with the material. Notably highlighted were cell membrane damage; cytoplasm detachment; formation of vacuoles, possibly due to DNA condensation, in association with regions exhibiting different levels of electron density; and membrane lysis. PCR and flow cytometry analyses were used to confirm and quantify the observations of cell integrity. The direct exposure of cells to silver, combined with the oxidative stress induced by the reactive oxygen species (ROS) generated, was identified to be responsible for these morphological alterations. From the first 5 min of treatment with the Al2O3-TiO2-Ag material, 98% of E. coli isolates were lysed. From 30 min, cell viability decreased to reach total inactivation, although approximately 1% of permeable E. coli cells and 1% of intact cells (10(5) genomic units·ml(-1)) were evidenced. This study demonstrates that the bactericidal effect of the material results from a synergic action of desorbed and supported silver. Supported silver was shown to generate the ROS evidenced. PMID:26253665

  6. Valence State Driven Site Preference in the Quaternary Compound Ca5MgAgGe5: An Electron-Deficient Phase with Optimized Bonding

    SciTech Connect

    Ponou, Simeon; Lidin, Sven; Zhang, Yuemei; Miller, Gordon J.

    2014-04-18

    The quaternary phase Ca5Mg0.95Ag1.05(1)Ge5 (3) was synthesized by high-temperature solid-state techniques, and its crystal structure was determined by single-crystal diffraction methods in the orthorhombic space group Pnma – Wyckoff sequence c12 with a = 23.1481(4) Å, b = 4.4736(1) Å, c = 11.0128(2) Å, V = 1140.43(4) Å3, Z = 4. The crystal structure can be described as linear intergrowths of slabs cut from the CaGe (CrB-type) and the CaMGe (TiNiSi-type; M = Mg, Ag) structures. Hence, 3 is a hettotype of the hitherto missing n = 3 member of the structure series with the general formula R2+nT2X2+n, previously described with n = 1, 2, and 4. The member with n = 3 was predicted in the space group Cmcm – Wyckoff sequence f5c2. The experimental space group Pnma (in the nonstandard setting Pmcn) corresponds to a klassengleiche symmetry reduction of index two of the predicted space group Cmcm. This transition originates from the switching of one Ge and one Ag position in the TiNiSi-related slab, a process that triggers an uncoupling of each of the five 8f sites in Cmcm into two 4c sites in Pnma. The Mg/Ag site preference was investigated using VASP calculations and revealed a remarkable example of an intermetallic compound for which the electrostatic valency principle is a critical structure-directing force. The compound is deficient by one valence electron according to the Zintl concept, but LMTO electronic structure calculations indicate electronic stabilization and overall bonding optimization in the polyanionic network. Other stability factors beyond the Zintl concept that may account for the electronic stabilization are discussed.

  7. Ag on Si(111) from basic science to application

    SciTech Connect

    Belianinov, Aleksey

    2012-01-01

    In our work we revisit Ag and Au adsorbates on Si(111)-7x7, as well as experiment with a ternary system of Pentacene, Ag and Si(111). Of particular interest to us is the Si(111)-(√3x√3)R30°}–Ag (Ag-Si-√3 hereafter). In this thesis I systematically explore effects of Ag deposition on the Ag-Si-√3 at different temperatures, film thicknesses and deposition fluxes. The generated insight of the Ag system on the Si(111) is then applied to generate novel methods of nanostructuring and nanowire growth. I then extend our expertise to the Au system on the Ag-Si(111) to gain insight into Au-Si eutectic silicide formation. Finally we explore behavior and growth modes of an organic molecule on the Ag-Si interface.

  8. Translating public health knowledge into practice: development of a lay health advisor perinatal tobacco cessation program.

    PubMed

    English, Kevin C; Merzel, Cheryl; Moon-Howard, Joyce

    2010-01-01

    The value of lay health advisor (LHA) interventions as an effective approach toward ameliorating racial, ethnic and/socioeconomic health disparities has been noted by researchers and policy makers. Translating scientific knowledge to bring state-of-the-art health promotion/disease prevention innovation to underserved populations is critical for addressing these health disparities. This article examines the experiences of a community-academic partnership in designing, developing, and implementing an evidence-based, LHA-driven perinatal tobacco cessation program for low-income, predominately African American and Hispanic women. A multimethod process evaluation was conducted to analyze three essential domains of program implementation: (1) fit of the tobacco cessation program into the broader project context, (2) feasibility of program implementation, and (3) fidelity to program implementation protocols. Findings indicate that project partners have largely succeeded in integrating an evidence-based tobacco cessation program into a community-based maternal and infant health project. The successful implementation of this intervention appears to be attributable to the following two predominant factors: (1) the utilization of a scientifically validated tobacco cessation intervention model and (2) the emphasis on continuous LHA training and capacity development. PMID:20357602

  9. Nothing to declare: mandatory and voluntary disclosure leads advisors to avoid conflicts of interest.

    PubMed

    Sah, Sunita; Loewenstein, George

    2014-02-01

    Professionals face conflicts of interest when they have a personal interest in giving biased advice. Mandatory disclosure--informing consumers of the conflict--is a widely adopted strategy in numerous professions, such as medicine, finance, and accounting. Prior research has shown, however, that such disclosures have little impact on consumer behavior, and can backfire by leading advisors to give even more biased advice. We present results from three experiments with real monetary stakes. These results show that, although disclosure has generally been found to be ineffective for dealing with unavoidable conflicts of interest, it can be beneficial when providers have the ability to avoid conflicts. Mandatory and voluntary disclosure can deter advisors from accepting conflicts of interest so that they have nothing to disclose except the absence of conflicts. We propose that people are averse to being viewed as biased, and that policies designed to activate reputational and ethical concerns will motivate advisors to avoid conflicts of interest. PMID:24379156

  10. Association Between IL-10 Gene Promoter Polymorphisms (-592 A/C, -819 T/C, -1082 A/G) and Susceptibility to HBV Infection in an Iranian Population

    PubMed Central

    Moudi, Bita; Heidari, Zahra; Mahmoudzadeh-Sagheb, Hamidreza; Hashemi, Mohammad; Metanat, Malihe; Khosravi, Soheila; Farrokh, Parisa

    2016-01-01

    Background IL-10 can play a vital role in immune response against HBV. Three biallelic SNPs from the transcription start site control the transcription of the IL-10 gene. An association between susceptibility to HBV and IL-10 polymorphisms has been suggested in patients with HBV infection. Objectives The present study was designed to study the association between polymorphisms in interleukin-10 (-1082 A/G, -819 T/C and -592 A/C) promoter gene and chronic hepatitis B virus (HBV) infection. Patients and Methods 221 chronically infected patients and 200 healthy control subjects were enrolled in the study. Three biallelic (-1082 A/G, -819 T/C and -592 A/C) polymorphisms in the IL-10 promoter gene were determined by PCR-RFLP method. Results Persistent HBV infection was associated with IL-10-1082 AG (P = 0.001) and GG (P = 0.004) genotypes and G (P = 0.000) allele. IL-10-819 T/C and -592 A/C genotype and allele frequencies did not show any correlation with the risk of chronic hepatitis B infection. Conclusions These results suggest that polymorphisms in interleukin-10 gene promoter influence clinical outcome of HBV infection and susceptibility to HBV infection. PMID:27148384

  11. Partially disordered state and spin-lattice coupling in an S=3/2 triangular lattice antiferromagnet Ag2CrO2

    NASA Astrophysics Data System (ADS)

    Matsuda, M.; Yoshida, H.; Isobe, M.; de La Cruz, C.; Fishman, R. S.

    2012-02-01

    Ag2CrO2 consists of triangular lattice planes of CrO2, which are well separated by the metallic Ag2 layers. [1] This compound is an S=3/2 frustrated triangular lattice antiferromagnet without orbital degree of freedom. We performed neutron diffraction experiments on a powder sample of Ag2CrO2 on a neutron powder diffractometer HB-2A and a triple-axis neutron spectrometer HB-1, installed at HFIR in Oak Ridge National Laboratory. With decreasing temperature, a short-range 4-sublatice spin state develops. However, a long-range partially disordered state with 5 sublattices abruptly appears at TN=24 K, accompanied by a structural distortion, and persists at least down to 2 K. The spin-lattice coupling stabilizes the anomalous state, which is expected to appear only in limited ranges of further-neighbor interactions and temperature. It was found that the spin-lattice coupling is a common feature in triangular lattice antiferromagnets with multiple-sublattice spin states, since the triangular lattice is elastic. [4pt] [1] H. Yoshida et al., to appear in J. Phys. Soc. Jpn.

  12. Ag-Air Service

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Econ, Inc.'s agricultural aerial application, "ag-air," involves more than 10,000 aircraft spreading insecticides, herbicides, fertilizer, seed and other materials over millions of acres of farmland. Difficult for an operator to estimate costs accurately and decide what to charge or which airplane can handle which assignment most efficiently. Computerized service was designed to improve business efficiency in choice of aircraft and determination of charge rates based on realistic operating cost data. Each subscriber fills out a detailed form which pertains to his needs and then receives a custom-tailored computer printout best suited to his particular business mix.

  13. An unprecedented Ag-pipemidic acid complex with helical structure: Synthesis, structure and interaction with CT-DNA

    NASA Astrophysics Data System (ADS)

    Li, Meng-Ting; Sun, Jing-Wen; Sha, Jing-Quan; Wu, Hong-Bin; Zhang, Er-Lin; Zheng, Tao-Ye

    2013-08-01

    A new Ag-pipemidic acid complex with helical structure has been prepared and structurally characterized by routine technique. Single-crystal X-ray diffraction analysis shows that there are the left- and right-handed helical chains constructed by Ag ions and PPA drugs along the b direction. And two types of helical chains are connected into 2D layer by sharing pseudo-tetra-nuclear clusters, which are stabilized by PPA-1 molecules as scaffolds. UV study of the interaction of the complex with CT-DNA shows that the title complex can bind to the CT-DNA and exhibits the higher binding constant (Kb) than free HPPA drugs. Additionally, its competitive study with ethidium bromide and the relatively high KSV value also indicates that complex can bind to DNA for the intercalative binding sites.

  14. An energy investigation into 1D/2D oriented-attachment assemblies of 1D Ag nanocrystals.

    PubMed

    Lv, Weiqiang; Yang, Xuemei; Wang, Wei; Niu, Yinghua; Liu, Zhongping; He, Weidong

    2014-09-15

    In the field of oriented-attachment crystal growth, one-dimensional nanocrystals are frequently employed as building blocks to synthesize two-dimensional or large-aspect-ratio one-dimensional nanocrystals. Despite recent extensive experimental advances, the underlying inter-particle interaction in the synthesis still remains elusive. In this report, using Ag as a platform, we investigate the van der Waals interactions associated with the side-by-side and end-to-end assemblies of one-dimensional nanorods. The size, aspect ratio, and inter-particle separation of the Ag precursor nanorods are found to have dramatically different impacts on the van der Waals interactions in the two types of assemblies. Our work facilitates the fundamental understanding of the oriented-attachment assembling mechanism based on one-dimensional nanocrystals. PMID:24954815

  15. AGS experiments - 1994, 1995, 1996

    SciTech Connect

    Depken, J.C.

    1997-01-01

    This report contains the following information on the Brookhaven AGS Accelerator complex: FY 1996 AGS schedule as run; FY 1997 AGS schedule (working copy); AGS beams 1997; AGS experimental area FY 1994 physics program; AGS experimental area FY 1995 physics program; AGS experimental area FY 1996 physics program; AGS experimental area FY 1997 physics program (in progress); a listing of experiments by number; two-phage summaries of each experiment begin here, also ordered by number; listing of publications of AGS experiments begins here; and listing of AGS experimenters begins here.

  16. Pd-Cu(2)O and Ag-Cu(2)O hybrid concave nanomaterials for an effective synergistic catalyst.

    PubMed

    Li, Lingling; Chen, Xiaobin; Wu, Yuen; Wang, Dingsheng; Peng, Qing; Zhou, Gang; Li, Yadong

    2013-10-11

    Palladium and silver salts were combined with Cu2 O octadecahedra in concave heterostructures. The formation of concave faces involved selective oxidative etching of Cu2 O on the {100} faces and in situ growth of Pd/Ag on different sites. The structures showed superior catalytic activities to both single domains and their mixtures in a model Sonogashira-type organic reaction. PMID:24038721

  17. Ag doped hollow TiO2 nanoparticles as an effective green fungicide against Fusarium solani and Venturia inaequalis phytopathogens.

    PubMed

    Boxi, Siddhartha Sankar; Mukherjee, Khushi; Paria, Santanu

    2016-02-26

    Chemical-based pesticides are widely used in agriculture to protect crops from insect infestation and diseases. However, the excessive use of highly toxic pesticides causes several human health (neurological, tumor, cancer) and environmental problems. Therefore nanoparticle-based green pesticides have become of special importance in recent years. The antifungal activities of pure and Ag doped (solid and hollow) TiO2 nanoparticles are studied against two potent phytopathogens, Fusarium solani (which causes Fusarium wilt disease in potato, tomato, etc) and Venturia inaequalis (which causes apple scab disease) and it is found that hollow nanoparticles are more effective than the other two. The antifungal activities of the nanoparticles were further enhanced against these two phytopathogens under visible light exposure. The fungicidal effect of the nanoparticles depends on different parameters, such as particle concentration and the intensity of visible light. The minimum inhibitory dose of the nanoparticles for V. inaequalis and F. solani are 0.75 and 0.43 mg/plate. The presence of Ag as a dopant helps in the formation of stable Ag-S and disulfide bonds (R-S-S-R) in cellular protein, which leads to cell damage. During photocatalysis generated (•)OH radicals loosen the cell wall structure and this finally leads to cell death. The mechanisms of the fungicidal effect of nanoparticles against these two phytopathogens are supported by biuret and triphenyl tetrazolium chloride analyses and field emission electron microscopy. Apart from the fungicidal effect, at a very low dose (0.015 mg/plate) the nanoparticles are successful in arresting production of toxic napthoquinone pigment for F. solani which is related to the fungal pathogenecity. The nanoparticles are found to be effective in protecting potatoes affected by F. solani or other fungi from spoiling. PMID:26808118

  18. Ag doped hollow TiO2 nanoparticles as an effective green fungicide against Fusarium solani and Venturia inaequalis phytopathogens

    NASA Astrophysics Data System (ADS)

    Sankar Boxi, Siddhartha; Mukherjee, Khushi; Paria, Santanu

    2016-02-01

    Chemical-based pesticides are widely used in agriculture to protect crops from insect infestation and diseases. However, the excessive use of highly toxic pesticides causes several human health (neurological, tumor, cancer) and environmental problems. Therefore nanoparticle-based green pesticides have become of special importance in recent years. The antifungal activities of pure and Ag doped (solid and hollow) TiO2 nanoparticles are studied against two potent phytopathogens, Fusarium solani (which causes Fusarium wilt disease in potato, tomato, etc) and Venturia inaequalis (which causes apple scab disease) and it is found that hollow nanoparticles are more effective than the other two. The antifungal activities of the nanoparticles were further enhanced against these two phytopathogens under visible light exposure. The fungicidal effect of the nanoparticles depends on different parameters, such as particle concentration and the intensity of visible light. The minimum inhibitory dose of the nanoparticles for V. inaequalis and F. solani are 0.75 and 0.43 mg/plate. The presence of Ag as a dopant helps in the formation of stable Ag-S and disulfide bonds (R-S-S-R) in cellular protein, which leads to cell damage. During photocatalysis generated •OH radicals loosen the cell wall structure and this finally leads to cell death. The mechanisms of the fungicidal effect of nanoparticles against these two phytopathogens are supported by biuret and triphenyl tetrazolium chloride analyses and field emission electron microscopy. Apart from the fungicidal effect, at a very low dose (0.015 mg/plate) the nanoparticles are successful in arresting production of toxic napthoquinone pigment for F. solani which is related to the fungal pathogenecity. The nanoparticles are found to be effective in protecting potatoes affected by F. solani or other fungi from spoiling.

  19. 40 CFR 35.4185 - What does my group do with reports our technical advisor prepares for us?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... technical advisor prepares for us? 35.4185 Section 35.4185 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE STATE AND LOCAL ASSISTANCE Grants for Technical Assistance Managing Your Tag § 35.4185 What does my group do with reports our technical advisor prepares...

  20. 40 CFR 35.4185 - What does my group do with reports our technical advisor prepares for us?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... technical advisor prepares for us? 35.4185 Section 35.4185 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE STATE AND LOCAL ASSISTANCE Grants for Technical Assistance Managing Your Tag § 35.4185 What does my group do with reports our technical advisor prepares...

  1. 40 CFR 35.4185 - What does my group do with reports our technical advisor prepares for us?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... technical advisor prepares for us? 35.4185 Section 35.4185 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE STATE AND LOCAL ASSISTANCE Grants for Technical Assistance Managing Your Tag § 35.4185 What does my group do with reports our technical advisor prepares...

  2. 40 CFR 35.4185 - What does my group do with reports our technical advisor prepares for us?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... technical advisor prepares for us? 35.4185 Section 35.4185 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE STATE AND LOCAL ASSISTANCE Grants for Technical Assistance Managing Your Tag § 35.4185 What does my group do with reports our technical advisor prepares...

  3. 40 CFR 35.4185 - What does my group do with reports our technical advisor prepares for us?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... technical advisor prepares for us? 35.4185 Section 35.4185 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE STATE AND LOCAL ASSISTANCE Grants for Technical Assistance Managing Your Tag § 35.4185 What does my group do with reports our technical advisor prepares...

  4. 76 FR 33376 - Altegris Advisors, L.L.C. and Northern Lights Fund Trust; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-08

    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION Altegris Advisors, L.L.C. and Northern Lights Fund Trust; Notice of Application June 1, 2011...: Altegris Advisors, L.L.C. (the ``Adviser'') and Northern Lights Fund Trust (the ``Trust''). DATES:...

  5. Contextualizing Gay-straight Alliances: Student, Advisor, and Structural Factors Related to Positive Youth Development among Members

    ERIC Educational Resources Information Center

    Poteat, V. Paul; Yoshikawa, Hirokazu; Calzo, Jerel P.; Gray, Mary L.; DiGiovanni, Craig D.; Lipkin, Arthur; Mundy-Shephard, Adrienne; Perrotti, Jeff; Scheer, Jillian R.; Shaw, Matthew P.

    2015-01-01

    Gay-straight alliances (GSAs) may promote resilience. Yet, what GSA components predict well-being? Among 146 youth and advisors in 13 GSAs (58% lesbian, gay, bisexual, or questioning; 64% White; 38% received free/reduced-cost lunch), student (demographics, victimization, attendance frequency, leadership, support, control), advisor (years served,…

  6. College Advisor, Student, and Senior Staff Member Perceptions of Academic Advising Modalities and Types: A Community College Case Study

    ERIC Educational Resources Information Center

    Marvin, Daniel C.

    2013-01-01

    Institutions of higher learning, their senior staff members, and advisors are always striving to create advising modalities and utilize matching advising types that work best for the individual student. This qualitative single-case study was conducted to examine perceptions of the students, advisors, and senior staff members of the advising…

  7. How Do Black Male College Students Develop Supportive Relationships with White Faculty Members and Advisors at a Predominately White Institution

    ERIC Educational Resources Information Center

    Franco, Karina Elizabeth

    2012-01-01

    This qualitative study examined how Black male students develop supportive relationships with White faculty members and advisors at a predominately White urban institution in the Southeastern United State. A multiple-case study method was used to explore how Black males define support, what faculty and advisor characteristics attract Black male…

  8. A Survey on Advisor Perceptions of the Academic Advising Program at the University of Alaska Anchorage Anchorage, Alaska

    ERIC Educational Resources Information Center

    Willis-Haslip, Shirlee

    2011-01-01

    This survey research was the basis of the dissertation for the researcher's doctoral program at George Fox University, and was conducted at the University of Alaska Anchorage (UAA). The purpose of this study was to measure the perception of faculty advisors and professional academic advisors in regard to the importance, responsibility for and…

  9. The Relationship of Worldviews of Advisors and Students and Satisfaction with Advising: A Case of Homogenous Group Impact

    ERIC Educational Resources Information Center

    Coll, Jose E.; Zalaquett, Carlos

    2008-01-01

    The purpose of this study was to investigate whether differences in world-views between academic advisors and their advisees (both traditional and non-traditional students) impact students' use of and satisfaction with the advising process. This study surveyed 115 students and 5 advisors from a four-year liberal arts university in southeastern…

  10. The Impact of Education Support Advisors on the Attendance, Discipline, and Achievement of At-Risk Students

    ERIC Educational Resources Information Center

    Townsend, Cathy J.

    2010-01-01

    This quantitative, causal-comparative study utilized ex post facto data to examine the impact of education support advisors (ESAs) on the discipline, attendance, and achievement of at-risk students in Grades 3-12. Fourteen education support advisors working in 16 elementary and 8 secondary schools of this mid-Atlantic school district consistently…

  11. 77 FR 41464 - IndexIQ Advisors LLC and IndexIQ Active ETF Trust; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-13

    ... COMMISSION IndexIQ Advisors LLC and IndexIQ Active ETF Trust; Notice of Application July 9, 2012. AGENCY... grant relief from certain disclosure requirements. Applicants: IndexIQ Advisors LLC (``Manager'') and IndexIQ Active ETF Trust (``Trust''). Filing Dates: The application was filed on September 9, 2011,...

  12. BiPO4 photocatalyst employing synergistic action of Ag/Ag3PO4 nanostructure and graphene nanosheets

    NASA Astrophysics Data System (ADS)

    Mohaghegh, N.; Rahimi, E.

    2016-06-01

    Graphene-supported BiPO4/Ag/Ag3PO4 photocatalyst has been fabricated by simple hydrothermal and impregnation reaction. In BiPO4/Ag/Ag3PO4 based on Reduced Graphene Oxide (RGO), this network renders numerous pathways for rapid mass transport, strong adsorption and multireflection of incident light; meanwhile, the interface between BiPO4/Ag/Ag3PO4 and RGO increases the active sites and electron transfer rate. BiPO4/Ag/Ag3PO4 based on RGO noticeably exhibited high photocatalytic activity than that of BiPO4/Ag/Ag3PO4 and P25 under visible light irradiation for cationic dye (Rhodamine B), anionic dye (methyl orange) and 4-chlorophenol (4-CP) as a neutral pollutant, which are usually difficult to be degraded over the other catalysts. This enhanced photocatalytic activity of Graphene-supported BiPO4/Ag/Ag3PO4 for all pollutants could be mainly ascribed to the reinforced charge transfer from BiPO4/Ag/Ag3PO4 to RGO, which suppresses the recombination of electron/hole pairs. Besides that, this photocatalyst can be used repetitively with a high photocatalytic activity and no apparent loss of activity occurs. The results reveal that the RGO nanosheets work as a photocatalyst promoter during the photocatalytic reaction, leading to an improved photocatalytic activity.

  13. Template synthesis of Ag/AgCl microrods and their efficient visible light-driven photocatalytic performance

    SciTech Connect

    Chen, Hua; Xiao, Liang; Huang, Jianhua

    2014-09-15

    Highlights: • Preparation ofAg/AgCl microrods by reaction of Ag{sub 2}WO{sub 4} microrods with NaCl solution. • Generation of metallic Ag is induced by the ambient light in the synthesis process. • Ag/AgCl shows excellent visible light-driven photodegradation of organic dyes. - Abstract: Ag/AgCl microrods, aggregated by nanoparticles with a diameter ranging from 100 nm to 2 μm, were prepared by an ion-exchange reaction at 80 °C between Ag{sub 2}WO{sub 4} template and NaCl solution. The existence of metallic Ag species was confirmed by XRD, DRS and XPS measurements. Ag/AgCl microrods showed excellent photocatalytic activity for the degradation of rhodamine B and methylene blue under visible light irradiation. The degradation rate constants of rhodamine B and methylene blue are 0.176 and 0.114 min{sup −1}, respectively. The cycling photodegradation experiments suggest that Ag/AgCl microds could be employed as stable plasmonic photocatalysts for the degradation of organic dyes under visible light irradiation.

  14. Sequence analysis of the Bs-Ag1 gene of Baylisascaris schroederi from the giant panda and an evaluation of the efficacy of a recombinant Baylisascaris schroederi Bs-Ag1 antigen in mice.

    PubMed

    He, Guangzhi; Chen, Sijie; Wang, Tao; Yan, Yubo; Zhang, Zhihe; Li, Desheng; Yu, Hua; Xie, Yue; Wang, Chengdong; Gu, Xiaobin; Wang, Shuxian; Peng, Xuerong; Yang, Guangyou

    2012-07-01

    The Baylisascaris schroederi infection rate among wild giant pandas may reach over 50% or even 100%, making it one of the leading causes of death from primary or secondary infection in wild populations. Until now, little was known about how protective immunity to B. schroederi infection could be achieved. The present study was conducted to evaluate the immunogenicity and protective efficacy of recombinant Bs-Ag1 from B. schroederi, by cloning the full-length Bs-Ag1 gene of B. schroederi and expressing it in a heterologous host, Escherichia coli BL21. In mice vaccinated with rBs-Ag1 coupled with Freund's complete adjuvant (FCA), there was a significant reduction (69.2%) in the recovery of challenged B. schroederi L3 compared with either nonvaccinated controls or mice vaccinated with FCA alone. Our study supports the use of Bs-Ag1 as a potential candidate for vaccination against B. schroederi infection and provides basic data for further vaccination trials with mixtures of antigens (with Bs-Ag2 and Bs-Ag3) to B. schroederi. PMID:22339267

  15. Molten Salt Power Tower Cost Model for the System Advisor Model (SAM)

    SciTech Connect

    Turchi, C. S.; Heath, G. A.

    2013-02-01

    This report describes a component-based cost model developed for molten-salt power tower solar power plants. The cost model was developed by the National Renewable Energy Laboratory (NREL), using data from several prior studies, including a contracted analysis from WorleyParsons Group, which is included herein as an Appendix. The WorleyParsons' analysis also estimated material composition and mass for the plant to facilitate a life cycle analysis of the molten salt power tower technology. Details of the life cycle assessment have been published elsewhere. The cost model provides a reference plant that interfaces with NREL's System Advisor Model or SAM. The reference plant assumes a nominal 100-MWe (net) power tower running with a nitrate salt heat transfer fluid (HTF). Thermal energy storage is provided by direct storage of the HTF in a two-tank system. The design assumes dry-cooling. The model includes a spreadsheet that interfaces with SAM via the Excel Exchange option in SAM. The spreadsheet allows users to estimate the costs of different-size plants and to take into account changes in commodity prices. This report and the accompanying Excel spreadsheet can be downloaded at https://sam.nrel.gov/cost.

  16. PI in the sky: The astronaut science advisor on SLS-2

    NASA Technical Reports Server (NTRS)

    Hazelton, Lyman R.; Groleau, Nicolas; Frainier, Richard J.; Compton, Michael M.; Colombano, Silvano P.; Szolovits, Peter

    1994-01-01

    The Astronaut Science Advisor (ASA, also known as Principal-Investigator-in-a-Box) is an advanced engineering effort to apply expert systems technology to experiment monitoring and control. Its goal is to increase the scientific value of information returned from experiments on manned space missions. The first in-space test of the system will be in conjunction with Professor Larry Young's (MIT) vestibulo-ocular 'Rotating Dome' experiment on the Spacelab Life Sciences 2 mission (STS-58) in the Fall of 1993. In a cost-saving effort, off-the-shelf equipment was employed wherever possible. Several modifications were necessary in order to make the system flight-worthy. The software consists of three interlocking modules. A real-time data acquisition system digitizes and stores all experiment data and then characterizes the signals in symbolic form; a rule-based expert system uses the symbolic signal characteristics to make decisions concerning the experiment; and a highly graphic user interface requiring a minimum of user intervention presents information to the astronaut operator. Much has been learned about the design of software and user interfaces for interactive computing in space. In addition, we gained a great deal of knowledge about building relatively inexpensive hardware and software for use in space. New technologies are being assessed to make the system a much more powerful ally in future scientific research in space and on the ground.

  17. Modelo Pedagogico de Educacion Primaria para Adultos: Manual para el Asesor de Estudiantes Libres. Primera Parte (A Pedagogical Model for Adult Primary Education: Manual for the Student Advisor. Part One).

    ERIC Educational Resources Information Center

    Instituto Nacional para la Educacion de los Adultos, Mexico City (Mexico).

    This guide, part of a Mexican series of instructional materials, is intended for advisors of students participating in an adult education program offered through public and private organizations in communities in Mexico. The first part of the program comprises Spanish and math; the second, education for family life, education for community life,…

  18. Later stages of evolution of an epithermal system: Au-Ag mineralizations at Apigania Bay, Tinos Island, Cyclades, Hellas, Greece

    NASA Astrophysics Data System (ADS)

    Tombros, S. F.; St. Seymour, K.; Williams-Jones, A. E.; Spry, P. G.

    2008-11-01

    Precious metals accompany all types of epithermal deposits. In general, the largest of these deposits occur in intrusive or extrusive rocks of alkaline or calc-alkaline affinity. The Apigania Bay vein system and Au-Ag mineralization is hosted in Mesozoic marbles and schists, and is composed primarily of five nearly parallel, high-angle quartz veins that extend for at least 200 m. Gold-silver mineralization, in association with more than thirty ore and vein minerals, is developed in three stages and occurs at the contact of marbles and schists. Zones of epidote-chlorite-calcite and sericite-albite alteration are associated with precious metal-bearing milky and clear quartz veins. Fluid inclusion studies suggest that hydrothermal mineralization was deposited under hydrostatic pressures of 100 bars, at temperature of 120-235°C, from low to moderate, calcium-bearing, saline fluids of 0.2 to 6.8 equiv. wt.% NaCl. Calculated isotope compositions (δ18O = -4.7‰ to 1.7‰ and δD = -120‰ to -80‰) for waters in equilibrium with milky and clear quartz are consistent with mixing with dilute, low temperature meteoric ore fluids. Calculated δ 13CCO2 (0.6‰ to 1.1‰) and δ 34SH2S (-7.3 to -0.3‰) compositions of the ore fluids indicate exchange, in an open system, with a metasedimentary source. Gold and silver deposition was associated with degassing of hydrogen due to intense uplift of the mineralizing area. The physicochemical conditions of mineralization stages I to III range between 200°C and 150°C, f_{{text{S}}_2 } = 10^{ - 18.1} to 10-16.8, f_{{text{O}}_2 } = 10^{ - 44.0} to 10-41.5, pH = 6.9 to7.6, f_{{text{H}}_{text{2}} {text{S}}} = 10^{ - 3.4} to 10-2.6 and a_{{text{H}}_{text{2}} {text{S}}} = 10^{ - 2.7} to 10-2.6. Apigania Bay could be possibly considered the latest evolutional phase of Tinos hydrothermal system.

  19. PIKA as an adjuvant enhances specific humoral and cellular immune responses following the vaccination of mice with HBsAg plus PIKA.

    PubMed

    Shen, Erxia; Li, Li; Li, Lietao; Feng, Lianqiang; Lu, Lin; Yao, Ziliang; Lin, Haixiang; Wu, Changyou

    2007-04-01

    An adjuvant is usually used to enhance the immune response induced by vaccines. The choice of adjuvant or immune enhancer determines the effectiveness of the immune response. Currently, aluminium (Alum, a generic term for salts of aluminium) is the only FDA-approved adjuvant. Alum predominantly induces the differentiation of Th2 cells and thus mediates an antibody immune response. Therefore, there is an urgent need for new adjuvants that enhance not only humoral but also cellular immune responses. In the present study, we demonstrates that PIKA (a stabilized dsRNA) as an adjuvant directly induces the activation and the proliferation of both B and NK cells in vitro. Injection of PIKA into mice results in the production of cytokines in vivo. In addition, the study demonstrates that PIKA promotes the maturation of bone marrow-derived dendritic cells (BMDCs) including up-regulation of the co-stimulatory molecules CD80, CD86 and CD40, and the induction of cytokines such as IL-12p70, IL-12p40 and IL-6. Importantly, after immunization of mice with HBsAg plus PIKA, the presence of PIKA enhances the titers of HBsAg-specific IgG and HBsAg-specific IFN-gamma production. These results demonstrate that PIKA as an adjuvant can promote both humoral and cellular immune responses. These might have an implication in applying PIKA as an adjuvant to be used in the design and development of both therapeutic and preventive vaccines, and used in the clinical study. PMID:17484805

  20. Acceleration of heavy ions in the AGS

    SciTech Connect

    Barton, M.Q.

    1983-01-01

    It is possible to use the Brookhaven AGS as a heavy ion machine by adding a cyclotron to the Tandem and using this combination as injector. An intermediate step for lighter ions might consist of injecting the Tandem beam directly into the AGS. In either case, quite high intensities should be possible.

  1. Study of antibacterial activity of Ag and Ag2CO3 nanoparticles stabilized over montmorillonite

    NASA Astrophysics Data System (ADS)

    Sohrabnezhad, Sh.; Pourahmad, A.; Mehdipour Moghaddam, M. J.; Sadeghi, A.

    2015-02-01

    Silver carbonate and silver nanoparticles (NPs) over of stabilizer montmorillonite (MMT) have been synthesized in aqueous and polyol solvent, respectively. Dispersions of silver nanoparticles have been prepared by the reduction of silver nitrate over of MMT in presence and absence of Na2CO3 compound in ethylene glycol. It was observed that montmorillonite was capable of stabilizing formed Ag nanoparticles through the reduction of Ag+ ions in ethylene glycol. Na2CO3 was used as carbonate source in synthesis of Ag2CO3 NPs in water solvent and also for controlling of Ag nanoparticles size in ethylene glycol medium. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and ultraviolet-visible diffuse reflectance spectroscopy (DRS). The TEM images showed that Ag NPs size in presence Na2CO3 salts was smaller than without that. The results indicated intercalation of Ag and Ag2CO3 nanoparticles into the montmorillonite clay layers. The diffuse reflectance spectra exhibited a strong surface plasmon resonance (SPR) adsorption peak in the visible region, resulting from Ag nanoparticles. The antibacterial testing results showed that the Ag2CO3-MMT nanocomposite exhibited an antibacterial activity higher than Ag-MMT sample against Escherichia coli.

  2. Spectroscopic Study on Eu3+ Doped Borate Glasses Containing Ag Nanoparticles and Ag Aggregates.

    PubMed

    Fu, Shaobo; Zheng, Hui; Zhang, Jinsu; Li, Xiangping; Sun, Jiashi; Hua, Ruinian; Dong, Bin; Xia, Haiping; Chen, Baojiu

    2015-01-01

    Transparent Eu(3+)-doped borate glasses containing Ag nanoparticles and Ag aggregates with composition (40 - x) CaO-59.5B2O3-0.5Eu2O3-xAgNO3 were prepared by a simple one-step melt-quenching technique. The X-ray diffraction (XRD) patterns of the glasses reveal amorphous structural properties and no diffraction peaks belonging to metal Ag particles. Ag particles and Ag aggregates were observed from the absorption spectra. Effective energy transfers from the Ag aggregates to the Eu3+ ions were observed in the excitation spectra from monitoring the intrinsic emission of Eu3+x .5D0 --> 7F2. The glasses with higher Ag content can be effectively excited by light in a wide wavelength region, indicating that these glasses have potential application in the solid state lighting driven by semiconductor light emitting diodes (LEDs). The emission spectra of the samples with higher Ag contents exhibit plenteous spectral components covering the full visible region from violet to red, thus indicating that these glass materials possess an excellent and tunable color rendering index. The color coordinates for all the glass samples were calculated by using the intensity-corrected emission spectra and the standard data issued by the CIE (Commission International de l' Eclairage) in 1931. It was found that the color coordinates for most samples with higher Ag contents fall into the white region in the color space. PMID:26328363

  3. Highly efficient and stable Ag-AgBr/TiO2 composites for destruction of Escherichia coli under visible light irradiation.

    PubMed

    Wang, Xiaoping; Lim, Teik-Thye

    2013-08-01

    A series of Ag-AgBr/TiO2 composites were prepared by a sol-gel method followed by photoreduction. Effect of Ag-AgBr content on the physicochemical properties and antibacterial activities of the Ag-AgBr/TiO2 composites was investigated. These composites showed intrinsic antibacterial activities against Escherichia coli (E. coli) in the dark attributed to the Ag nanoparticles dispersed in the composites. Under visible light irradiation, inactivation of E. coli over these Ag-AgBr/TiO2 composites was attributed to both their photocatalytic disinfection activities and intrinsic antibacterial properties. The Ag-AgBr/TiO2 with an optimum Ti/Ag atomic ratio of 10 exhibited superior visible-light photocatalytic activities for ibuprofen degradation and mineralization as compared to the other Ag-AgBr/TiO2 composites and also Ag-AgBr/P25, Ag/TiO2 and TiO2. It is probably because of the coexistence of two visible-light active components (AgBr and Ag nanoparticles) and the most effective separation of photogenerated electrons and holes in this photocatalyst. Correspondingly, the photocatalyst achieved a much higher efficiency of E. coli destruction than Ag-AgBr/P25 and TiO2. E. coli was almost completely inactivated (7-log reduction) within 60 min by the photocatalyst with a rather low dosage of 0.05 g L(-1) under white LED irradiation. Furthermore, the Ag-AgBr/TiO2 showed high stability for photocatalytic destruction of E. coli and the dark repair and photoreactivation did not occur after the photocatalytic process. Finally, the action spectrum of this photocatalyst for E. coli inactivation and the influence of several inorganic ions present in surface water were also investigated. PMID:23562562

  4. The Drenchwater deposit, Alaska: An example of a natural low pH environment resulting from weathering of an undisturbed shale-hosted Zn-Pb-Ag deposit

    USGS Publications Warehouse

    Graham, G.E.; Kelley, K.D.

    2009-01-01

    The Drenchwater shale-hosted Zn-Pb-Ag deposit and the immediate vicinity, on the northern flank of the Brooks Range in north-central Alaska, is an ideal example of a naturally low pH system. The two drainages, Drenchwater and False Wager Creeks, which bound the deposit, differ in their acidity and metal contents. Moderately acidic waters with elevated concentrations of metals (pH ??? 4.3, Zn ??? 1400 ??g/L) in the Drenchwater Creek drainage basin are attributed to weathering of an exposed base-metal-rich massive sulfide occurrence. Stream sediment and water chemistry data collected from False Wager Creek suggest that an unexposed base-metal sulfide occurrence may account for the lower pH (2.7-3.1) and very metal-rich waters (up to 2600 ??g/L Zn, ??? 260 ??g/L Cu and ???89 ??g/L Tl) collected at least 2 km upstream of known mineralized exposures. These more acidic conditions produce jarosite, schwertmannite and Fe-hydroxides commonly associated with acid-mine drainage. The high metal concentrations in some water samples from both streams naturally exceed Alaska state regulatory limits for freshwater aquatic life, affirming the importance of establishing base-line conditions in the event of human land development. The studies at the Drenchwater deposit demonstrate that poor water quality can be generated through entirely natural weathering of base-metal occurrences, and, possibly unmineralized black shale.

  5. Control and performance of the AGS and AGS Booster Main Magnet Power Supplies

    SciTech Connect

    Reece, R.K.; Casella, R.; Culwick, B.; Geller, J.; Marneris, I.; Sandberg, J.; Soukas, A.; Zhang, S.Y.

    1993-06-01

    Techniques for precision control of the main magnet power supplies for the AGS and AGS Booster synchrotron will be discussed. Both synchrotrons are designed to operate in a Pulse-to-Pulse Modulation (PPM) environment with a Supercycle Generator defining and distributing global timing events for the AGS Facility. Details of modelling, real-time feedback and feedforward systems, generation and distribution of real time field data, operational parameters and an overview of performance for both machines are included.

  6. Control and performance of the AGS and AGS Booster Main Magnet Power Supplies

    SciTech Connect

    Reece, R.K.; Casella, R.; Culwick, B.; Geller, J.; Marneris, I.; Sandberg, J.; Soukas, A.; Zhang, S.Y.

    1993-01-01

    Techniques for precision control of the main magnet power supplies for the AGS and AGS Booster synchrotron will be discussed. Both synchrotrons are designed to operate in a Pulse-to-Pulse Modulation (PPM) environment with a Supercycle Generator defining and distributing global timing events for the AGS Facility. Details of modelling, real-time feedback and feedforward systems, generation and distribution of real time field data, operational parameters and an overview of performance for both machines are included.

  7. Perceptions and Practices of Technology Student Association Advisors on Implementation Strategies and Teaching Methods

    ERIC Educational Resources Information Center

    Haynie, W. J.; DeLuca, V. W.; Matthews, B.

    2005-01-01

    A study conducted in 1989 surveyed Technology Student Association (TSA) advisors to find their perceptions concerning characteristics of technology education programs with a TSA component and the relationship between participation in co-curricular organizations and the teaching methods used by TSA technology teachers (DeLuca & Haynie, 1991).…

  8. 76 FR 20385 - President's Council of Advisors on Science and Technology; Notice of Meeting: Partially Closed...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-12

    ...This notice sets forth the schedule and summary agenda for a partially closed meeting of the President's Council of Advisors on Science and Technology (PCAST), and describes the functions of the Council. Notice of this meeting is required under the Federal Advisory Committee Act (FACA), 5 U.S.C.,...

  9. Community health advisors' perceptions of the 2005 Dietary Guidelines and MyPyramid

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Abstract Objectives: To describe Community Health Advisors' (CHAs) awareness, knowledge, and perceptions of the 2005 Dietary Guidelines for Americans (2005 DG) and MyPyramid. Methods & Subjects: A 33-item self-administered questionnaire was completed by 106 CHAs residing in Alabama and Mississippi. ...

  10. A Community Health Advisor Program to Reduce Cardiovascular Risk among Rural African-American Women

    ERIC Educational Resources Information Center

    Cornell, C. E.; Littleton, M. A.; Greene, P. G.; Pulley, L.; Brownstein, J. N.; Sanderson, B. K.; Stalker, V. G.; Matson-Koffman, D.; Struempler, B.; Raczynski, J. M.

    2009-01-01

    The Uniontown, Alabama Community Health Project trained and facilitated Community Health Advisors (CHAs) in conducting a theory-based intervention designed to reduce the risk for cardiovascular disease (CVD) among rural African-American women. The multiphased project included formative evaluation and community organization, CHA recruitment and…

  11. Accommodations in Teacher Education: Perspectives of Teacher Candidates with Learning Disabilities and Their Faculty Advisors

    ERIC Educational Resources Information Center

    Csoli, Karen; Gallagher, Tiffany L.

    2012-01-01

    This study of teacher candidates with learning disabilities profiles their experience in a teacher education program. Two teacher candidates and their faculty advisors offer perspectives at various points during the teacher education program. Findings indicate that the teacher candidates were able to complete their required courses when their…

  12. STORED GRAIN ADVISOR PRO: DECISION SUPPORT SYSTEM FOR INSECT MANAGEMENT IN COMMERCIAL GRAIN ELEVATORS

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A decision support system, Stored Grain Advisor Pro (SGA Pro), was developed to provide insect pest management information for grain stored at commercial elevators. The program uses a model to predict future risk based on current insect density, grain temperature and moisture. A rule-based system wa...

  13. Architects, Captains, and Dreamers: Creating Advisor Roles that Foster Youth-Adult Partnerships

    ERIC Educational Resources Information Center

    Mitra, Dana; Lewis, Tiffanie; Sanders, Felicia

    2013-01-01

    While research has documented the many ways in which student voice can enable educational change, the process of how adults can help to enable student voice is less clear. This article examines how adults new to working as advisors of student voice initiatives begin to develop partnerships with young people. Using a Youth-Adult Partnership…

  14. 78 FR 42115 - NGAM Advisors, LP, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-15

    ... COMMISSION NGAM Advisors, LP, et al.; Notice of Application July 9, 2013. AGENCY: Securities and Exchange..., 2011, and amended on February 8, 2012, July 16, 2012, December 4, 2012, and May 23, 2013. Hearing or... Commission by 5:30 p.m. on August 5, 2013, and should be accompanied by proof of service on applicants,...

  15. 77 FR 5065 - Preservation Trust Advisors, LLC and Northern Lights Fund Trust; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-01

    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION Preservation Trust Advisors, LLC and Northern Lights Fund Trust; Notice of Application January 26...'') and Northern Lights Fund Trust (the ``Trust''). FILING DATES: The application was filed on...

  16. Evaluation of a College Curriculum Advisory Program Utilizing Student Advisors. Final Report.

    ERIC Educational Resources Information Center

    Brown, Coke R.

    This study was designed to evaluate the viability of using students as academic advisors for freshmen students and to document the process of the advising program at Idaho State University. Results show that students advised by students did as well academically and had a lower dropout rate than students advised by faculty. Descriptions of advisor…

  17. Crop advisor perceptions of giant ragweed distribution, herbicide-resistance, and management in the Corn Belt

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Giant ragweed has been increasing as a major weed of row crops in North America. We conducted a web-based survey of Certified Crop Advisors in the Corn Belt to determine the current distribution of giant ragweed, the distribution of herbicide resistant populations, and management and ecological fact...

  18. 17 CFR 3.10 - Registration of futures commission merchants, introducing brokers, commodity trading advisors...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 17 Commodity and Securities Exchanges 1 2010-04-01 2010-04-01 false Registration of futures commission merchants, introducing brokers, commodity trading advisors, commodity pool operators and leverage transaction merchants. 3.10 Section 3.10 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION REGISTRATION Registration §...

  19. 76 FR 14379 - Subcommittee Meeting of the Board of Advisors to the President, Naval Postgraduate School

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-16

    ... the following meeting of the Subcommittee Meeting of the Board of Advisors (BOA) to The President... deliberations leading to provisional findings for referral to the BOA to the Presidents of the NPS and the Naval... the NPS BOA contact Ms. Jaye Panza, Designated Federal Officer, Naval Postgraduate School,...

  20. Graduate Students' Perceptions of Their Advisors: Is There Systematic Disadvantage in Mentorship?

    ERIC Educational Resources Information Center

    Noy, Shiri; Ray, Rashawn

    2012-01-01

    We explore how race and gender shape graduate students' perceptions of their advisors. We find evidence that women of color and students in the biological/physical sciences report significantly less support than other groups. Our findings speak to the utility of the intersectionality framework for examining interpersonal relations in higher…

  1. Culturally Competent Training Program: A Key to Training Lay Health Advisors for Promoting Breast Cancer Screening

    ERIC Educational Resources Information Center

    Yu, Mei-yu; Song, Lixin; Seetoo, Amy; Cai, Cuijuan; Smith, Gary; Oakley, Deborah

    2007-01-01

    The lay health advisor (LHA) training program for breast cancer screening was conducted among Chinese-English bilingual trainees residing in Southeast Michigan. Guided by Bandura's Social Learning Theory, the development of the training curriculum followed the health communication process recommended by the National Cancer Institute. Data analysis…

  2. 75 FR 33369 - EQ Advisors Trust, et al.; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-11

    ... to invest in certain financial instruments. Applicants: EQ Advisors Trust, AXA Premier VIP Trust... future will comply with the terms and conditions of the application. \\2\\ A Fund of Funds may not invest... to permit Funds that invest in Underlying Funds in reliance on section 12(d)(1)(G) of the Act,...

  3. 76 FR 11701 - Amendments to Commodity Pool Operator and Commodity Trading Advisor Regulations Resulting From...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-03

    ... would establish business conduct standards for swap dealers and major swap participants. See 75 FR 80638... and Commodity Trading Advisors: Amendments to Compliance Obligations, 76 FR 7976 (Feb. 11, 2011); and Swap Data Recordkeeping and Reporting Requirements; Proposed Rule, 75 FR 76574 (Dec. 8, 2010). II....

  4. Three Ways Small-Business Advisors Can Counter the Myths of Manufacturing.

    ERIC Educational Resources Information Center

    Thompson, Sara Murray

    1997-01-01

    Addresses the following myths: manufacturers are all large businesses; services are the wave of the future; all manufacturers use new technologies; manufacturing jobs are low skill; manufacturing is unionized; manufacturers are resistant to change and care only about production. Suggests that advisors can help small businesses by serving as a…

  5. Beyond Course-to-Course: New Information On Program Transfer. The Advisor

    ERIC Educational Resources Information Center

    British Columbia Council on Admissions and Transfer, 2003

    2003-01-01

    "The Advisor" provides important information or "system alerts," in user-friendly format and language, on issues and changes affecting admissions and transfer. This document outlines where in the BC Transfer Guide to locate information on transferring between specific programs at different institutions. Please note this document was published…

  6. 75 FR 56055 - Advisory Committee and Species Working Group Technical Advisor Appointments

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-15

    ... Atlantic Tunas (ICCAT) as established by the Atlantic Tunas Convention Act of 1975 (ATCA). NMFS is also... Bluefin Tuna Working Group, a Swordfish and Sharks Working Group, a Billfish Working Group, and a BAYS (Bigeye, Albacore, Yellowfin, and Skipjack) Tunas Working Group. Technical Advisors to the species...

  7. Teachers Providing Social and Emotional Support: A Study of Advisor Role Enactment in Small High Schools

    ERIC Educational Resources Information Center

    Phillippo, Kate L.

    2010-01-01

    Background/Context: This study investigates the teacher's role in the student advisory process, which to date has generated limited research literature. Teachers who serve as student advisors assume a role that extends beyond the more traditional instructional role, and includes implied or explicit expectations to provide student advisees with…

  8. The Advisory Working Alliance Inventory--Advisor Version: Scale Development and Validation

    ERIC Educational Resources Information Center

    Schlosser, Lewis Z.; Gelso, Charles J.

    2005-01-01

    The development of the Advisory Working Alliance Inventory-Advisor Version (AWAI-A) is presented. In the first study, data from 236 faculty members from APA-accredited counseling psychology programs were subjected to a principal components analysis, yielding 3 subscales: Rapport (15 items), Apprenticeship (8 items), and Task Focus (8 items). The…

  9. A National Study Examining the Impact of SEVIS on International Student and Scholar Advisors

    ERIC Educational Resources Information Center

    Rosser, Vicki J.; Hermsen, Jill M.; Mamiseishvili, Ketevan; Wood, Melinda S.

    2007-01-01

    The purpose of this research is to examine the impact that Student and Exchange Visitor Information System (SEVIS) is having on the professional worklives of international student and scholar advisors (ISSAs) on U.S. college and university campuses. ISSAs are clearly satisfied with their work and hold their institutions in high regard. However,…

  10. 77 FR 74837 - President's Council of Advisors on Science and Technology (PCAST)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-18

    ...This notice sets forth the schedule and summary agenda for a partially closed meeting of the President's Council of Advisors on Science and Technology (PCAST), and describes the functions of the Council. Notice of this meeting is required under the Federal Advisory Committee Act (FACA), 5 U.S.C., App....

  11. 75 FR 4054 - Sunshine Act; Notice of Virtual Public Forum for EAC Board of Advisors

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-26

    ... COMMISSION Sunshine Act; Notice of Virtual Public Forum for EAC Board of Advisors DATE & TIME: Monday... efficient manner in a public forum, including being able to review and discuss draft documents, when it is... any resolutions during the 12-day forum of February 8-February 19, 2010. Members will post...

  12. Case Studies Comparing System Advisor Model (SAM) Results to Real Performance Data: Preprint

    SciTech Connect

    Blair, N.; Dobos, A.; Sather, N.

    2012-06-01

    NREL has completed a series of detailed case studies comparing the simulations of the System Advisor Model (SAM) and measured performance data or published performance expectations. These case studies compare PV measured performance data with simulated performance data using appropriate weather data. The measured data sets were primarily taken from NREL onsite PV systems and weather monitoring stations.

  13. "Pleasantly Unexpected": The Nature and Impact of Resident Advisors' Functional Relationships with Faculty

    ERIC Educational Resources Information Center

    Benjamin, Mimi; Griffin, Kimberly A.

    2013-01-01

    Interacting with faculty has several benefits for students; however, little research has explored faculty-student interactions that are neither academic nor social, but occur within the context of students' work. This interpretive study reviews experiences of 73 resident advisors whose work responsibilities require interaction with faculty.…

  14. The Influence of the CAS Standards on Academic Advisors and Advising Programs

    ERIC Educational Resources Information Center

    Keeling, Sarah

    2010-01-01

    Research on the influence of the Council for the Advancement of Standards in Higher Education (CAS) on academic advising is limited. Using a comparative case study method, I respond to this research gap by exploring how the standards influence practices of academic advising programs. Study results indicate that participating advisors knew little…

  15. MySci Advisors: Establishing a Peer-Mentoring Program for First Year Science Student Support

    ERIC Educational Resources Information Center

    Poling, Kirsten

    2015-01-01

    Would you like to help your students adjust to university life? Perhaps you are simply interested in allowing them to feel more integrated into a department right from the start of their first year? These were the types of issues that we were hoping to address when we founded the MySci Advisors Program, a peer-mentoring group for first year…

  16. Installation and evaluation of a nuclear power plant operator advisor based on artificial intelligence technology

    SciTech Connect

    Hajek, B.K.; Miller, D.W.

    1989-06-20

    This report discusses the following topics on a Nuclear Power Plant operator advisor based on artificial Intelligence Technology; Workstation conversion; Software Conversion; V V Program Development Development; Simulator Interface Development; Knowledge Base Expansion; Dynamic Testing; Database Conversion; Installation at the Perry Simulator; Evaluation of Operator Interaction; Design of Man-Machine Interface; and Design of Maintenance Facility.

  17. 77 FR 38277 - President's Council of Advisors on Science and Technology Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-27

    ...This notice sets forth the schedule and summary agenda for a partially closed meeting of the President's Council of Advisors on Science and Technology (PCAST), and describes the functions of the Council. Notice of this meeting is required under the Federal Advisory Committee Act (FACA), 5 U.S.C.,...

  18. 77 FR 25210 - Advisors Series Trust and Orinda Asset Management, LLC; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-27

    ... reasons discussed below. 6. Applicants assert that the shareholders expect the Advisor subject to the... materially amend subadvisory agreements without shareholder approval and would grant relief from certain... will have been approved by each respective Fund's initial shareholder and the Trust's Board of...

  19. 76 FR 55368 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-07

    ... From the Federal Register Online via the Government Publishing Office DEARTMENT OF EDUCATION President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of... assist the nation in reaching its goal of having the highest proportion of college graduates by 2020;...

  20. 76 FR 7550 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-10

    ... From the Federal Register Online via the Government Publishing Office DEARTMENT OF EDUCATION President's Board of Advisors on Historically Black Colleges and Universities AGENCY: U.S. Department of... institutions that can assist the nation in reaching its goal of having the highest proportion of...

  1. 77 FR 54571 - President's Board of Advisors on Historically Black Colleges and Universities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-05

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF EDUCATION President's Board of Advisors on Historically Black Colleges and Universities AGENCY: President's Board of... institutions that can assist the nation in reaching its goal of having the highest proportion of...

  2. 75 FR 62612 - President's Council of Advisors on Science and Technology Meeting; Notice of Meeting: Partially...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-12

    ... TECHNOLOGY POLICY President's Council of Advisors on Science and Technology Meeting; Notice of Meeting... defense or foreign policy under 5 U.S.C. 552b(c)(1). The precise date and time of this potential meeting has not yet been determined. Public Comments: It is the policy of the PCAST to accept written...

  3. Characteristics of and Challenges for Advisors within a Privatized Extension System

    ERIC Educational Resources Information Center

    Knuth, Ulrike; Knierim, Andrea

    2013-01-01

    Purpose: The aim of this article is to provide evidence on the consequences of the privatization process in Brandenburg with a focus on the agricultural advisors' situation. Before the background of future European Union (EU) expectations on Farm Advisory Systems (FAS), their capacities and competences to respond to such challenges are discussed.…

  4. Modules and Information Retrieval Facilities of the Human Use Regulatory Affairs Advisor (HURAA).

    ERIC Educational Resources Information Center

    Graesser, Arthur C.; Hu, Xiangen; Person, Natalie; Jackson, Tanner; Toth, Joe

    The Human Use Regulatory Affairs Advisor (HURAA) is a Web-based facility that provides help and training on the ethical use of human subjects in research, based on documents and regulations in United States Federal agencies. HURAA has a number of standard features of conventional Web facilities and computer-based training, such as hypertext,…

  5. The Moderating Effect of Personality Traits on Advisor Relationships in Predicting Doctoral Student Burnout

    ERIC Educational Resources Information Center

    Kosh, Emily P.

    2014-01-01

    Personality affects relationships. During the doctoral education, the second most important factor in degree completion, after financial support, is the student-advisor relationship. Approximately half of doctoral students do not finish their degrees. While it is known mentors have a profound impact on the success of doctoral students, the effect…

  6. 78 FR 45459 - Extension of Sunset Date for Attorney Advisor Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-29

    ... and issue decisions that are fully favorable when the documentary record warrants. 72 FR 44763. We... without change as a final rule. 73 FR 11349. Under this rule, some attorney advisors may develop claims... final rule that extended the sunset date of the program until August 10, 2011. 74 FR 33327. We...

  7. Expanding Research in Academic Advising: Methodological Strategies to Engage Advisors in Research

    ERIC Educational Resources Information Center

    Aiken-Wisniewski, Sharon A.; Smith, Joshua S.; Troxel, Wendy G.

    2010-01-01

    Research in academic advising has traditionally been conducted and disseminated by faculty researchers, graduate students, and higher education administrators (including advising directors). While significant in developing a body of literature to guide academic advising, the sources of the contribution also suggest that the frontline advisor does…

  8. Regional setting and characteristics of the Neoproterozoic Wadi Hamama Zn-Cu-Ag-Au prospect: evidence for an intra-oceanic island arc-hosted volcanogenic hydrothermal system

    NASA Astrophysics Data System (ADS)

    Abd El-Rahman, Yasser; Surour, Adel A.; El-Manawi, Abdel Hamid W.; El-Dougdoug, Abdel-Monem A.; Omar, Sayed

    2015-04-01

    The Wadi Hamama area is a volcanogenic Zn-Cu-Au-Ag prospect. It is hosted by a Neoproterozoic bimodal-mafic sequence, which comprises basalt, dacite and rhyolite along with volcaniclastic rocks. The rocks have a low-K tholeiitic affinity and are enriched in large ion lithophile elements over high field strength elements, which indicated their formation in an intra-oceanic island arc tectonic setting. The area was intruded by a tonalite-trondhjemite body, which has an intra-oceanic island arc affinity and later by diorite, which has a cordilleran-margin geochemical affinity. These rock units were intruded by post-tectonic granite dykes, which have a within-plate geochemical signature. There is a quartz-carbonate horizon extending along the contact between the basalt and the volcaniclastic rocks, mainly banded and lapilli tuffs. This horizon is of exhalative origin and is underlain by a mushroom-shaped alteration zone extending from the horizon down to the massive basalt. The footwall alteration is characterized by a silica-rich core surrounded by a thick chlorite sheath. Both the quartz-carbonate horizon and the footwall-altered rocks enclose historical trenches and pits. Sulfide-rich core samples are enriched in Zn, relative to Cu, and in Ag, which indicates the low-temperature nature of the hydrothermal system. The prospect was affected by supergene processes, which led to the widespread occurrence of secondary copper minerals and gold enrichment relative to the leached base metals, especially Zn. The prospect formed through a limited rifting of an intra-oceanic island arc which resulted in the formation of a small-scale volcanogenic Zn-Cu-Ag-Au prospect.

  9. Strongly visible-light responsive plasmonic shaped AgX:Ag (X = Cl, Br) nanoparticles for reduction of CO2 to methanol.

    PubMed

    An, Changhua; Wang, Jizhuang; Jiang, Wen; Zhang, Meiyu; Ming, Xijuan; Wang, Shutao; Zhang, Qinhui

    2012-09-21

    Plasmonic shaped AgX:Ag (X = Cl, Br) nanoparticles have been synthesized by a facile and versatile glycerol-mediated solution route. The as-prepared AgX:Ag nanoparticles exhibit regular shapes, i.e., cube-tetrapod-like AgCl:Ag nanoparticles and AgBr:Ag nanoplates. Compared with the pristine AgX, AgX:Ag nanocomposites display stronger absorption in the visible region due to the surface plasmon resonance of silver nanoparticles. The calculation of bandgaps and band positions indicates the as-achieved AgX:Ag nanoparticles can be used as a class of potential photocatalyst for the reduction of CO(2). For example, reduction of CO(2) under visible light irradiation with the assistance of the anisotropic AgX:Ag nanoparticles yields as much as 100 μmol methanol in the products. Furthermore, the AgX:Ag nanoparticles can maintain its structure and activity after 3 runs of reactions. Therefore, the present route opens an avenue to acquire plasmonic photocatalysts for conversion of CO(2) into useful organic compounds. PMID:22869008

  10. Balancing the Osteogenic and Antibacterial Properties of Titanium by Codoping of Mg and Ag: An in Vitro and in Vivo Study.

    PubMed

    Zhao, Yaochao; Cao, Huiliang; Qin, Hui; Cheng, Tao; Qian, Shi; Cheng, Mengqi; Peng, Xiaochun; Wang, Jiaxin; Zhang, Yin; Jin, Guodong; Zhang, Xianlong; Liu, Xuanyong; Chu, Paul K

    2015-08-19

    To simultaneously enhance the osteogenic and antibacterial properties of titanium, we introduced magnesium (Mg), silver (Ag), or both by using the plasma immersion ion implantation (PIII) technique, producing three PIII sample groups, namely, Mg-doped titanium (Mg-PIII), Ag-doped titanium (Ag-PIII), and Mg and Ag codoped titanium (Mg/Ag-PIII). The in vitro antibacterial efficacy of Mg/Ag-PIII group was about 7-10% higher than that of Ag-PIII. In vitro and in vivo results demonstrated that osteogenic property of Mg/Ag PIII group was better than that of Ag-PIII or Mg-PIII. It was believed that the galvanic effects between Mg and Ag NPs played a key role in facilitating the release of Mg but reducing the release of silver, answering for the selective performances of the Mg/Ag-PIII group over bacterial and mammalian cells. This study demonstrated that the integration of multiple functional elements could be realized by the dual-source PIII technique, and in this case, the antibacterial properties and osteogenic property of titanium could be balanced. PMID:26202255

  11. Electronic properties of highly-active Ag3AsO4 photocatalyst and its band gap modulation: an insight from hybrid-density functional calculations.

    PubMed

    Reunchan, Pakpoom; Boonchun, Adisak; Umezawa, Naoto

    2016-08-17

    The electronic structures of highly active Ag-based oxide photocatalysts Ag3AsO4 and Ag3PO4 are studied by hybrid-density functional calculations. It is revealed that Ag3AsO4 and Ag3PO4 are indirect band gap semiconductors. The Hartree-Fock mixing parameters are fitted for experimental band gaps of Ag3AsO4 (1.88 eV) and Ag3PO4 (2.43 eV). The smaller electron effective mass and the lower valence band edge of Ag3AsO4 are likely to be responsible for the superior photocatalytic oxidation reaction to Ag3PO4. The comparable lattice constant and analogous crystal structure between the two materials allow the opportunities of fine-tuning the band gap of Ag3AsxP1-xO4 using a solid-solution approach. The development of Ag3AsxP1-xO4 should be promising for the discovery of novel visible-light sensitized photocatalysts. PMID:27502998

  12. What Is Ag-Ed?

    ERIC Educational Resources Information Center

    Linley, Judy; Mylne, Lee

    1998-01-01

    Ag-Ed, an agricultural education project for upper elementary students, was held in conjunction with the Toowoomba Show in Queensland, Australia. Agriculture industry representatives provided 20 interactive agricultural presentations for class groups, which were supplemented with a teacher resource-package containing a directory and 13 sections of…

  13. Ag85A/ESAT-6 chimeric DNA vaccine induces an adverse response in tuberculosis-infected mice

    PubMed Central

    Liang, Yan; Bai, Xuejuang; Zhang, Junxian; Song, Jingying; Yang, Yourong; Yu, Qi; Li, Ning; Wu, Xueqiong

    2016-01-01

    The Mycobacterium tuberculosis (M. tb) antigens encoded by the 6 kDa early secretory antigenic target (esat-6) and antigen 85A (ag85a) genes are known to exert protective effects against tuberculosis in animal models. In addition, these antigens represent vaccine components that were tested in early human clinical trials. In the present study, a chimeric DNA vaccine was constructed that contained two copies of the esat-6 gene inserted into the ag85a gene from M. tb. BALB/c mice were treated with this chimeric vaccine following infection with either M. tb H37Rv or a clinical multi drug resistant tuberculosis isolate. Treatment of both groups of mice with the chimeric vaccine resulted in accelerated mortality. These findings are in contrast with previous results, which indicated that DNA vaccines expressing the individual antigens were either beneficial or at least not harmful. The results of the present study suggested that the ESAT-6 antigen is not suitable for inclusion in therapeutic vaccines. PMID:27279275

  14. Ag85A/ESAT-6 chimeric DNA vaccine induces an adverse response in tuberculosis-infected mice.

    PubMed

    Liang, Yan; Bai, Xuejuang; Zhang, Junxian; Song, Jingying; Yang, Yourong; Yu, Qi; Li, Ning; Wu, Xueqiong

    2016-08-01

    The Mycobacterium tuberculosis (M. tb) antigens encoded by the 6 kDa early secretory antigenic target (esat-6) and antigen 85A (ag85a) genes are known to exert protective effects against tuberculosis in animal models. In addition, these antigens represent vaccine components that were tested in early human clinical trials. In the present study, a chimeric DNA vaccine was constructed that contained two copies of the esat‑6 gene inserted into the ag85a gene from M. tb. BALB/c mice were treated with this chimeric vaccine following infection with either M. tb H37Rv or a clinical multi-drug-resistant tuberculosis isolate. Treatment of both groups of mice with the chimeric vaccine resulted in accelerated mortality. These findings are in contrast with previous results, which indicated that DNA vaccines expressing the individual antigens were either beneficial or at least not harmful. The results of the present study suggested that the ESAT-6 antigen is not suitable for inclusion in therapeutic vaccines. PMID:27279275

  15. A surface plasmon model for laser ablation of Ag sup + ions from a roughened Ag surface

    SciTech Connect

    Ritchie, R.H. Tennessee Univ., Knoxville, TN . Dept. of Physics); Manson, J.R. . Dept. of Physics); Echenique, P.M. . Faculdad de Quimica)

    1991-01-01

    Experimental work by Shea and Compton suggests that Ag{sup +} ions emitted from a roughened Ag surface irradiated by a nanosecond or picosecond laser beam may absorb the full energy of the Ag surface plasmon. We have modeled this process under the assumption that it proceeds through an inverse bremsstrahlung-type absorption of the SP quantum by Ag{sup +} ion which also undergoes a small-impact parameter collision with another ion or atom in the vicinity of the surface. We give a quantitative estimate of the absorption probability and find reasonable agreement with the Shea-Compton results. 8 refs., 2 figs.

  16. Traffic Management Advisor: Iterative Field Development and Assessment at Multiple Sites

    NASA Technical Reports Server (NTRS)

    Sanford, Beverly D.; Lee, Katharine K.; Harwood, Kelly; Denery, Dallas G. (Technical Monitor)

    1995-01-01

    Previous studies have demonstrated the necessity of involving users in the development of automation aids, especially for complex domains such as air traffic control (ATC). Traditional development only demanded a single field test to validate a completed system, but a more iterative combination of development and assessment ensures that the technology meets the requirements of its application domain. Exposure across an adequate spectrum of field users is also required during development, and the use of multiple development sites provides an opportunity to consider individual facility cultures as they relate to implementation strategies. The development of the Center/TRACON Automation System (CTAS) Traffic Management Advisor (TMA) at the Denver and Dallas ATC facilities demonstrates successful iterative development and assessment at multiple field sites. The use of field development changes the nature of assessment. As development progresses, periodic assessments are required to validate that system development is progressing along an appropriate track. In the development of the TMA, assessments were performed based on software in the field, and input from traffic managers was analyzed and incorporated into subsequent releases of the TMA, to be reassessed in the field. This has led to a tool with operational suitability and broad user acceptance. Assessment at multiple sites provides a more generalizable perspective that allows the production of a system that is both generic enough to be used at different sites and tailored enough to be of use at any site. In addition to providing a better understanding of specific facility requirements, the use of multiple assessment sites in the development of TMA has provided an opportunity to consider individual facility operations, procedures and cultures as they relate to development and implementation strategies.

  17. Therapy planning as constraint satisfaction: a computer-based antiretroviral therapy advisor for the management of HIV.

    PubMed Central

    Smith, D. S.; Park, J. Y.; Musen, M. A.

    1998-01-01

    We applied the Protégé methodology for building knowledge-based systems to the domain of antiretroviral therapy. We modeled the task of prescribing drug therapy for HIV, abstracting the essential characteristics of the problem solving. We mapped our model of the antiretroviral-therapy domain to the class of constraint-satisfaction problems, and reused the propose-and-revise problem-solving method, from the Protégé library of methods, to build an antiretroviral therapy advisor, ART Critic. Careful modeling and using Protégé allowed us to build a useful and extensible knowledge-based application rapidly. PMID:9929295

  18. Feasibility of a Web-Based Training System for Peer Community Health Advisors in Cancer Early Detection Among African Americans

    PubMed Central

    Santos, Sherie Lou Z.; Tagai, Erin K.; Wang, Min Qi; Scheirer, Mary Ann; Slade, Jimmie L.

    2014-01-01

    We describe the feasibility of a Web-based portal for training peer community health advisors (CHAs). We conducted a community-based implementation trial in African American churches between 2012 and 2014. The Web-based portal allows CHAs to log in and view 13 training videos, preparing them to deliver 3 cancer early detection workshops in their churches. Of 8 churches, 6 completed the training, each certifying 2 CHAs. These CHAs took an average of 26 days to complete the training, requiring little technical assistance. Additional technical assistance was required to implement the workshops. The Web-based system appears to be a feasible method for training lay individuals for the CHA role and has implications for increasing the reach of evidence-based interventions. PMID:25320894

  19. Navigating graduate school and beyond: A career guide for graduate students and a must read for every advisor

    NASA Astrophysics Data System (ADS)

    Schultz, Colin

    2012-05-01

    Beginning his scientific career as an engineering student at PSG College of Technology, in Coimbatore, India, Sundar A. Christopher has negotiated and navigated the higher-education system to become the chairman of the Department of Atmospheric Sciences at the University of Alabama in Huntsville. Drawing on his own experiences and on insights gleaned from the students who have passed through his graduate-level professional development course, Christopher takes a lighthearted look at peer review, proposal writing, managing budgets, and making the most of conferences in the AGU bookNavigating Graduate School and Beyond: A Career Guide for Graduate Students and a Must Read for Every Advisor. In this interview, Eos speaks to Christopher about overcoming the bureaucratic, logistical, and personal hurdles that too often lead students to disillusionment and conflict.

  20. Immunization of babies born to HBsAg positive mothers: An audit on the delivery and completeness of follow up in Norfolk and Suffolk, United Kingdom.

    PubMed

    Keeble, Stuart; Quested, Jane; Barker, Deborah; Varadarajan, Abina; Shankar, Ananda Giri

    2015-01-01

    Perinatal transmission of hepatitis B infection has increased in the UK over the last decade. Routine antenatal screening of pregnant mothers (based on HBsAg) provides an effective means to identify 'at risk' babies. Follow up of babies born to infected mothers involves 4 doses of vaccination and/or a single dose of HBIG at birth. In this study we report the outcome of follow up of babies born to infected mothers over a 5 y period. One hundred sixty-three babies born to HBsAg positive mothers were followed up to ascertain the completeness for immunization and serological testing. Vaccination completion was 99.4% (162 of babies) at birth (1st dose), 95.6% (152 babies) for the second dose (at 1st month), 94.3 % (148 babies) for the 3rd dose (at 2nd month) and 83.4% (106 babies) for the 4th dose (at 12 months). Additionally, at 12 months 29.9% (38) of babies had their blood tested serologically to ascertain infection status; all babies receiving antigen testing were HBsAg negative. The overall vaccination coverage was good, although there is scope to improve the coverage of 4th dose. However, the proportion of children who were serologically tested for surface antigen at 12 months was considerably lower and there is a greater need to test babies concurrently at the time of giving the 4(th) dose. The proposed dried blood spot testing which will be rolled out from September 2014 should address this issue. PMID:25876072

  1. Advanced Insulin Bolus Advisor Based on Run-To-Run Control and Case-Based Reasoning.

    PubMed

    Herrero, Pau; Pesl, Peter; Reddy, Monika; Oliver, Nick; Georgiou, Pantelis; Toumazou, Christofer

    2015-05-01

    This paper presents an advanced insulin bolus advisor for people with diabetes on multiple daily injections or insulin pump therapy. The proposed system, which runs on a smartphone, keeps the simplicity of a standard bolus calculator while enhancing its performance by providing more adaptability and flexibility. This is achieved by means of applying a retrospective optimization of the insulin bolus therapy using a novel combination of run-to-run (R2R) that uses intermittent continuous glucose monitoring data, and case-based reasoning (CBR). The validity of the proposed approach has been proven by in-silico studies using the FDA-accepted UVa-Padova type 1 diabetes simulator. Tests under more realistic in-silico scenarios are achieved by updating the simulator to emulate intrasubject insulin sensitivity variations and uncertainty in the capillarity measurements and carbohydrate intake. The CBR(R2R) algorithm performed well in simulations by significantly reducing the mean blood glucose, increasing the time in euglycemia and completely eliminating hypoglycaemia. Finally, compared to an R2R stand-alone version of the algorithm, the CBR(R2R) algorithm performed better in both adults and adolescent populations, proving the benefit of the utilization of CBR. In particular, the mean blood glucose improved from 166 ± 39 to 150 ± 16 in the adult populations (p = 0.03) and from 167 ± 25 to 162 ± 23 in the adolescent population (p = 0.06). In addition, CBR(R2R) was able to completely eliminate hypoglycaemia, while the R2R alone was not able to do it in the adolescent population. PMID:24956470

  2. Ebola Outbreak in Nigeria: Increasing Ebola Knowledge of Volunteer Health Advisors

    PubMed Central

    Patel, Unnati; Pharr, Jennifer R.; Ihesiaba, Chidi; Oduenyi, Frances U.; Hunt, Aaron T.; Patel, Dina; Obiefune, Michael; Chukwumerije, Nkem; Ezeanolue, Echezona E.

    2016-01-01

    In many low-income countries, volunteer health advisors (VHAs) play an important role in disseminating information, especially in rural or hard-to-reach locations. When the world’s largest outbreak of Ebola virus disease (EVD) occurred in 2014, a majority of cases were concentrated in the West African countries of Guinea, Liberia, and Sierra Leone. Twenty cases were reported in Nigeria initially and there was a need to rapidly disseminate factual information on Ebola virus. In southeast Nigeria, a group of VHAs was being used to implement the Healthy Beginning Initiative [HBI], a congregation based intervention to increase HIV testing among pregnant women and their male partners. The purpose of this study was to assess the baseline and post EVD training knowledge of VHAs during the outbreak in Nigeria. In September 2014, 59 VHAs attending a HBI training workshop in the Enugu State of Nigeria participated in an Ebola awareness training session. Participants completed a 10-item single-answer questionnaire that assessed knowledge of Ebola epidemiology, symptoms, transmission, prevention practices, treatment and survival prior to the Ebola awareness training. After the training, the VHAs repeated the questionnaire. Answers to pre and post questionnaires were analyzed using paired t-tests. Multiple linear regression was used to examine the relationship between pre and post total questionnaire scores and age, education, current location and employment. The average pre-test score was 7.3 and average post-test score was 7.8 which was a significant difference (t=-2.5, p=0.01). Prior to the training, there was a significant difference in Ebola knowledge based on the VHAs education only (p<0.01). After training, education was no longer significant for Ebola knowledge. Existing community health programs can be used as a platform to train VHAs in times of epidemics for quick dissemination of vital health information in areas lacking adequate health infrastructure and

  3. Ebola Outbreak in Nigeria: Increasing Ebola Knowledge of Volunteer Health Advisors.

    PubMed

    Patel, Unnati; Pharr, Jennifer R; Ihesiaba, Chidi; Oduenyi, Frances U; Hunt, Aaron T; Patel, Dina; Obiefune, Michael; Chukwumerije, Nkem; Ezeanolue, Echezona E

    2016-01-01

    In many low-income countries, volunteer health advisors (VHAs) play an important role in disseminating information, especially in rural or hard-to-reach locations. When the world's largest outbreak of Ebola virus disease (EVD) occurred in 2014, a majority of cases were concentrated in the West African countries of Guinea, Liberia, and Sierra Leone. Twenty cases were reported in Nigeria initially and there was a need to rapidly disseminate factual information on Ebola virus. In southeast Nigeria, a group of VHAs was being used to implement the Healthy Beginning Initiative [HBI], a congregation based intervention to increase HIV testing among pregnant women and their male partners. The purpose of this study was to assess the baseline and post EVD training knowledge of VHAs during the outbreak in Nigeria. In September 2014, 59 VHAs attending a HBI training workshop in the Enugu State of Nigeria participated in an Ebola awareness training session. Participants completed a 10-item single-answer questionnaire that assessed knowledge of Ebola epidemiology, symptoms, transmission, prevention practices, treatment and survival prior to the Ebola awareness training. After the training, the VHAs repeated the questionnaire. Answers to pre and post questionnaires were analyzed using paired t-tests. Multiple linear regression was used to examine the relationship between pre and post total questionnaire scores and age, education, current location and employment. The average pre-test score was 7.3 and average post-test score was 7.8 which was a significant difference (t=-2.5, p=0.01). Prior to the training, there was a significant difference in Ebola knowledge based on the VHAs education only (p<0.01). After training, education was no longer significant for Ebola knowledge. Existing community health programs can be used as a platform to train VHAs in times of epidemics for quick dissemination of vital health information in areas lacking adequate health infrastructure and personnel

  4. AGS experiments: 1993 - 1994 - 1995

    SciTech Connect

    Depken, J.C.

    1996-04-01

    This report contains: FY 1995 AGS Schedule as Run; FY 1996-97 AGE Schedule (working copy); AGS Beams 1995; AGS Experimental Area FY 1993 Physics Program; AGS Experimental Area FY 1994 Physics Program; AGS Experimental Area FY 1995 Physics Program; AGS Experimental Area FY 1996 Physics Program (In progress); A listing of experiments by number; Two-page summaries of each experiment begin here, also ordered by number; Listing of publications of AGS experiments begins here; and Listing of AGS experimenters begins here. This is the twelfth edition.

  5. High School Graduation: An Alternative

    ERIC Educational Resources Information Center

    O'Leary, Brian P.

    2010-01-01

    In Manitoba's Seven Oaks School Division, all 3,000 high school students have a teacher advisor who spends an hour a week with them throughout their four years in high school, knows them as individuals, knows their families, and acts as an academic and life coach. Advisors help students complete their first high school course registration and they…

  6. The effect of artificial seawater on SERS spectra of amino acids-Ag colloids: an experiment of prebiotic chemistry.

    PubMed

    Nascimento, Fernanda C; Carneiro, Cristine E A; de Santana, Henrique; Zaia, Dimas A M

    2014-01-24

    The large enhancement of signal observed in surface enhanced Raman spectroscopy (SERS) could be helpful for identifying amino acids on the surface of other planets, in particular for Mars, as well as in prebiotic chemistry experiments of interaction minerals/amino acids. This paper reports the effect of several substances (NaCl, MgCl2, KBr, CaSO4, K2SO4, MgSO4, KI, NH4Cl, SrCl2, CaCl2, Na2SO4, KOH, NaOH, H3BO3) on the SERS spectra of colloid of sodium citrate-CSC and colloid of sodium borohydride-CSB. The effect of four different artificial seawaters and these artificial seawaters plus amino acids (α-Ala-alanine, Gly-glycine, Cys-cysteine, AIB-2-aminoisobutiric acid) on SERS spectra using both CSC and CSB was also studied. For CSC, the effect of water, after dilution of the colloid, was the appearance of several absorption bands belonging to sodium citrate in the SERS spectrum. In general, artificial seawaters enhanced several bands in SERS spectra using CSC and CSB and CSC was more sensitive to those artificial seawaters than CSB. The identification of Gly, α-Ala and AIB using CSC or CSB was not possible because several bands belonging to artificial seawaters, sodium citrate or sodium borohydride were enhanced. On the other hand, artificial seawaters did not interfere in the SERS spectra of Cys using CSC or CSB, although the interaction of Cys with each colloid was different. For CSC the band at 2568 cm(-1) (S-H stretching) of Cys vanished and for CSB the intensity of this band decreased, indicating the -SH of Cys was bonded to Ag to form -S-Ag. Thus SERS spectroscopy could be used for Cys detection on Mars soils using Mars land rovers as well as to study the interaction between Cys and minerals in prebiotic chemistry experiments. PMID:24051298

  7. AN EXPERIMENTAL PROPOSAL TO STUDY HEAVY-ION COOLING IN THE AGS DUE TO BEAM GAS OR THE INTRABEAM SCATTERING.

    SciTech Connect

    TRBOJEVIC, D.; AHERNS, L.; ROSER, T.; MACKAY, W.; BRENNAN, J.; BLASKIEWICZ,M.; PARZEN, G.; BEEBE-WANG, J.

    2006-06-23

    Low emittance of not-fully-stripped gold (Z=79) Au{sup +77} Helium-like ion beams from the AGS (Alternating Gradient Synchrotron) injector to the Relativistic Heavy Ion Collider (RHIC) could be attributed to the cooling phenomenon due to inelastic intrabeam scattering [1,2] or due to electron de-excitations from collisions with the residual gas [3]. The low emittance gold beams have always been observed at injection in the Relativistic Heavy Ion Collider (RHIC). There have been previous attempts to attribute the low emittance to a cooling due to the exchange of energy between ions during the inelastic intrabeam scattering. The Fano-Lichten theory [4] of electron promotion might be applied during inelastic collisions between helium like gold ions in the AGS. The two K-shell electrons in gold Au{sup +77} could get promoted if the ions reach the critical distance of the closest approach during intra-beam scattering or collisions with the residual gas. During collisions if the ion energy is large enough, a quasi-molecule could be formed, and electron excitation could occur. During de-excitations of electrons, photons are emitted and a loss of total bunch energy could occur. This would lead to smaller beam size. We propose to inject gold ions with two missing electrons into RHIC, at injection energy, and study the beam behavior with bunched and de-bunched beam, varying the RF voltage and the beam intensity. If the ''cooling'' is observed additional X-ray detectors could be installed to observe emitted photons.

  8. EPIDAUROS Biotechnologie AG.

    PubMed

    Arnold, Hans-Peter; Kluge, Peter; Mauch, Simon

    2005-07-01

    EPIDAUROS Biotechnologie AG is a leading provider of pharmacogenetic consulting, genotyping and research services to the international pharmaceutical and biotechnology industries, contract research organizations and healthcare providers. The company's mission is to improve safety, efficacy and predictability in drug development and drug therapy. EPIDAUROS determines its customers' needs in the field of pharmacogenetics using an in-depth consultancy process. The development and conduct of genotyping assays for drug-metabolizing enzymes, drug transporters and drug targets (for example, receptors)--all performed under stringent quality standards--are a major activity at EPIDAUROS. The company offers its research services to academic and industrial partners for the development of innovative diagnostic solutions by using its intellectual property. PMID:16014003

  9. Between hope and evidence: how community advisors demarcate the boundary between legitimate and illegitimate stem cell treatments.

    PubMed

    Petersen, Alan; Tanner, Claire; Munsie, Megan

    2015-03-01

    Stem cell science provides an exemplary study of the 'management of hope'. On the one hand, raising 'hopes' and expectations is a seen as a necessary aspect of securing investment in promising innovative research. On the other, such hyperbole risks raising hopes to a level that may lead people to undertake undue risks, which may ultimately undermine confidence in medical research. In this context, the 'management of hope' thus involves the negotiation of competing claims of truth about the value and safety of particular treatments and about the trustworthiness of providers. Using Gieryn's concept of boundary-work, this article examines the means by which this work of 'managing hope' is undertaken. Drawing on data collected as part of our study that investigated the perspectives of those who are consulted by patients and their carers about stem cell treatments, we explore how these community advisors – both scientists and clinicians with a stake in stem cell research and representatives from patient advocacy groups – demarcate the boundary between legitimate and illegitimate treatments. In particular, we examine how these actors rhetorically use 'evidence' to achieve this demarcation. We argue that analysing accounts of how advisors respond to patient enquiries about stem cell treatments offers a window for examining the workings of the politics of hope within contemporary bioscience and biomedicine. In conclusion, we emphasize the need to re-conceptualize the boundary between science and non-science so as to allow a better appreciation of the realities of health care in the age of medical travel. PMID:25367895

  10. Acceptability of Delivering and Accessing Health Information Through Text Messaging Among Community Health Advisors

    PubMed Central

    Phillips, Janice; Mohiuddin, Mohammed Omar; McNees, Patrick; Scarinci, Isabel

    2013-01-01

    Background Communication technologies can play a significant role in decreasing communication inequalities and cancer disparities by promoting cancer control and enhancing population and individual health. Studies have shown that technology, such as the mobile phone short message service (SMS) or text messaging, can be an effective health communication strategy that influences individuals’ health-related decisions, behaviors, and outcomes. Objective The purpose of this study was to explore usage of communication technologies, assess the acceptability of mobile technology for delivery and access of health information, and identify cancer and health information needs among Deep South Network for Cancer Control trained Community Health Advisors as Research Partners (CHARPs). Methods A mixed-method design was used, and a triangulation protocol was followed to combine quantitative and qualitative data. Focus groups (4 focus groups; n=37) and self-administered surveys (n=77) were conducted to determine CHARPs mobile phone and text message usage. The objective was to include identification of barriers and facilitators to a mobile phone intervention. Results All participants were African American (37/37, 100%), 11/37 (89%) were women, and the mean age was 53.4 (SD 13.9; focus groups) and 59.9 (SD 8.7; survey). Nearly all (33/37, 89%) of focus group participants reported owning a mobile phone. Of those, 8/33 (24%) owned a smartphone, 22/33 (67%) had a text messaging plan, and 18/33 (55%) and 11/33 (33%) received and sent text messages several times a week or day, respectively. Similar responses were seen among the survey participants, with 75/77 (97%) reporting owning a mobile phone, and of those, 22/75 (30%) owned a smartphone, 39/75 (53%) had a text messaging plan, and 37/75 (50%) received and 27/75 (37%) sent text messages several times a week or day. The benefits of a text messaging system mentioned by focus group participants included alternative form of

  11. Agent planning in AgScala

    NASA Astrophysics Data System (ADS)

    Tošić, Saša; Mitrović, Dejan; Ivanović, Mirjana

    2013-10-01

    Agent-oriented programming languages are designed to simplify the development of software agents, especially those that exhibit complex, intelligent behavior. This paper presents recent improvements of AgScala, an agent-oriented programming language based on Scala. AgScala includes declarative constructs for managing beliefs, actions and goals of intelligent agents. Combined with object-oriented and functional programming paradigms offered by Scala, it aims to be an efficient framework for developing both purely reactive, and more complex, deliberate agents. Instead of the Prolog back-end used initially, the new version of AgScala relies on Agent Planning Package, a more advanced system for automated planning and reasoning.

  12. Enhanced Raman scattering and photocatalytic activity of Ag/ZnO heterojunction nanocrystals.

    PubMed

    Chen, Chongqi; Zheng, Yuanhui; Zhan, Yingying; Lin, Xingyi; Zheng, Qi; Wei, Kemei

    2011-10-01

    In this work, we study the enhancement of Raman signals and photocatalytic activity of Ag/ZnO heterojunctions with an Ag content of 1 at.%, which were synthesized by photochemical deposition of Ag nanoparticles onto pre-synthesized ZnO nanorods. A strong interaction between Ag and ZnO nanocrystals were evidenced by XPS and UV-vis spectroscopy. The binding energy of Ag nanoparticles shifts toward lower energy compared to that of pure Ag nanoparticles, revealing that electrons transfer from Ag to the ZnO nanocrystals. The red shift of the plasmon absorption peak of Ag nanoparticles in Ag/ZnO heterojunctions further confirms the strong interaction between the two components. This strong interaction, arising from the coupling between Ag and ZnO nanocrystals, is responsible for the enhancement of Raman signals and photocatalytic activity of the Ag/ZnO heterojunctions. PMID:21847472

  13. Parabolic Trough Collector Cost Update for the System Advisor Model (SAM)

    SciTech Connect

    Kurup, Parthiv; Turchi, Craig S.

    2015-11-01

    This report updates the baseline cost for parabolic trough solar fields in the United States within NREL's System Advisor Model (SAM). SAM, available at no cost at https://sam.nrel.gov/, is a performance and financial model designed to facilitate decision making for people involved in the renewable energy industry. SAM is the primary tool used by NREL and the U.S. Department of Energy (DOE) for estimating the performance and cost of concentrating solar power (CSP) technologies and projects. The study performed a bottom-up build and cost estimate for two state-of-the-art parabolic trough designs -- the SkyTrough and the Ultimate Trough. The SkyTrough analysis estimated the potential installed cost for a solar field of 1500 SCAs as $170/m2 +/- $6/m2. The investigation found that SkyTrough installed costs were sensitive to factors such as raw aluminum alloy cost and production volume. For example, in the case of the SkyTrough, the installed cost would rise to nearly $210/m2 if the aluminum alloy cost was $1.70/lb instead of $1.03/lb. Accordingly, one must be aware of fluctuations in the relevant commodities markets to track system cost over time. The estimated installed cost for the Ultimate Trough was only slightly higher at $178/m2, which includes an assembly facility of $11.6 million amortized over the required production volume. Considering the size and overall cost of a 700 SCA Ultimate Trough solar field, two parallel production lines in a fully covered assembly facility, each with the specific torque box, module and mirror jigs, would be justified for a full CSP plant.

  14. Advisor-Teller Money Manager (ATM) Therapy for Substance Use Disorders

    PubMed Central

    Rosen, Marc I.; Rounsaville, Bruce J.; Ablondi, Karen; Black, Anne C.; Rosenheck, Robert A.

    2011-01-01

    Objective Patients with concomitant psychiatric and substance use disorders are commonly assigned representative payees or case managers to help manage their funds, but money management has not been conceptualized as a theory-based treatment. This randomized clinical trial was conducted to determine the effect of a money management–based therapy, advisor-teller money manager (ATM), on substance abuse or dependence. Methods Ninety patients at a community mental health center who had a history of cocaine or alcohol abuse or dependence were assessed after random assignment to 36 weeks of ATM (N=47) or a control condition in which use of a financial workbook was reviewed (N=43). Patients assigned to ATM were encouraged to deposit their funds into a third-party account, plan weekly expenditures, and negotiate monthly budgets. Substance use calendars and urine toxicology tests were collected every other week for 36 weeks and again 52 weeks after randomization. Results Patients assigned to ATM had significantly more negative toxicologies for cocaine metabolite over time than patients in the control group, and treating clinicians rated ATM patients as significantly more likely to be abstinent from illicit drugs. Self-reported abstinence from alcohol did not significantly differ between groups. Unexpectedly, patients assigned to ATM were more likely to be assigned a representative payee or a conservator than control participants during the follow-up period (ten of 47 versus two of 43). One patient in ATM assaulted the therapist when his check had not arrived. Conclusions ATM is an efficacious therapy for the treatment of cocaine abuse or dependence among people with concomitant psychiatric illness but requires protection of patient autonomy and staff safety. PMID:20592006

  15. Effects of an artificial gravity countermeasure on orthostatic tolerance, blood volumes and aerobic power after short-term bed rest (BR-AG1).

    PubMed

    Linnarsson, Dag; Hughson, Richard L; Fraser, Katelyn S; Clément, Gilles; Karlsson, Lars L; Mulder, Edwin; Paloski, William H; Rittweger, Jörn; Wuyts, Floris L; Zange, Jochen

    2015-01-01

    Exposure to artificial gravity (AG) in a short-arm centrifuge has potential benefits for maintaining human performance during long-term space missions. Eleven subjects were investigated during three campaigns of 5 days head-down bed rest: 1) bed rest without countermeasures (control), 2) bed rest and 30 min of AG (AG1) daily, and 3) bed rest and six periods of 5 min AG (AG2) daily. During centrifugation, the supine subjects were exposed to AG in the head-to-feet direction with 1 G at the center of mass. Subjects participated in the three campaigns in random order. The cardiovascular effects of bed rest and countermeasures were determined from changes in tolerance to a head-up tilt test with superimposed lower body negative pressure (HUT), from changes in plasma volume (PV) and from changes in maximum aerobic power (V̇o2 peak) during upright work on a cycle ergometer. Complete data sets were obtained in eight subjects. After bed rest, HUT tolerance times were 36, 64, and 78% of pre-bed rest baseline during control, AG1 and AG2, respectively, with a significant difference between AG2 and control. PV and V̇o2 peak decreased to 85 and 95% of pre-bed rest baseline, respectively, with no differences between the treatments. It was concluded that the AG2 countermeasure should be further investigated during future long-term bed rest studies, especially as it was better tolerated than AG1. The superior effect of AG2 on orthostatic tolerance could not be related to concomitant changes in PV or aerobic power. PMID:25342708

  16. Beet Juice-Induced Green Fabrication of Plasmonic AgCl/Ag Nanoparticles

    EPA Science Inventory

    A simple, green, and fast approach (complete within 5 min) was explored for the fabrication of hybrid AgCl/Ag plasmonic nanoparticles under microwave (MW) irradiation. In this method, beet juice served as a reducing reagent, which is an abundant sugar-rich agricultural produce. I...

  17. 77 FR 13295 - Subcommittee Meeting of the Board of Advisors to the President of the Naval War College Subcommittee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-06

    ... Committee is: Board of Advisors (BOA) to the Presidents of the Naval Postgraduate School and the Naval War..., information, or to send written comments regarding the NWC BOA Subcommittee contact Mr. Richard R....

  18. 75 FR 53958 - Meeting of the Board of Advisors to the Presidents of the Naval Postgraduate School and the Naval...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-02

    ...), notice is hereby given that the following meeting of the Board of Advisors (BOA) to the Presidents of the... BOA, contact Ms. Jaye Panza, Naval Postgraduate School, 1 University Circle, Monterey, CA...

  19. 78 FR 21349 - Meeting of the Board of Advisors to the Presidents of the Naval Postgraduate School and Naval War...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-10

    ... and Naval War College, Naval Postgraduate School Subcommittee AGENCY: Department of the Navy, DoD... also through the Board of Advisors (BOA) to the Presidents of NPS and Naval War College report...

  20. 17 CFR 240.15Ba1-2 - Registration of municipal advisors and information regarding certain natural persons.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... municipal advisor pursuant to section 15B of the Act (15 U.S.C. 78o-4) must complete Form MA (17 CFR 249... municipal advisor pursuant to section 15B of the Act (15 U.S.C. 78o-4) must complete Form MA-I (17 CFR 249... pursuant to paragraph (a) of this section, must complete Form MA-I (17 CFR 249.1310) in accordance with...