These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

Advanced techniques in delivering data to the warfighter in a distributed information system  

NASA Astrophysics Data System (ADS)

The future requires military operations and intelligence communities to more heavily rely on Internet-based solutions for the delivery of MetOc data and products to the warfighter in an automated manner. These issues are being addressed by Tactical Environmental Data Services (TEDServices). TEDServices is being engineered by the Naval Research Laboratory, the Naval Oceanographic Office and the Naval Undersea Warfare Center, with sponsorship from Space and Naval Warfare Systems Command (SPAWAR) PMW-150. TEDServices was successfully demonstrated during April 2004, in FBE-Kilo, and is in transition to the US Navy this fiscal year. This paper will describe how TEDServices has been engineered to provide solutions to issues routinely confronted by warfighters. These solutions include, but are not limited to, better bandwidth usage, automated data ordering, simplification of data management, automated data transformations, forward deployed data caching, simplified integration with legacy tactical decision aids and support for joint interoperability.

Warner, Elizabeth; Ladner, Roy; Petry, Fred; Shea, John J.

2004-09-01

2

Warfighter nutrition: current opportunities and advanced technologies report from a Department of Defense workshop.  

PubMed

The Uniformed Services University hosted a conference in July 2008 entitled "Warfighter Nutrition: Advanced Technologies and Opportunities" with Health Affairs and the Defense Advanced Research Projects Agency to develop strategic and tactical plans that could enhance Force Health Protection (FHP) by optimizing warfighter nutrition within the Department of Defense (DoD). The conference focused on three aspects of military nutrition: (1) fueling the forces, or garrison feeding; (2) performance optimization or operational feeding during deployment; and (3) nutritional interventions to support health reset and healing. Presentations by speakers addressed practical interventions (i.e., ready for implementation now) and advanced technologies (i.e., approaches meriting prioritized research and development efforts to transition into application). The conference concluded that nutritional optimization represents an integral and proactive approach to prevent illness, injury, and performance degradation throughout all phases of military service. The overarching consensus achieved was that warfighter nutrition, as a cornerstone of FHP, warrants the critical attention of both medical and line leadership to move quickly to support current initiatives and future advanced technologies. PMID:19685836

Deuster, Patricia A; Weinstein, Ali A; Sobel, Annette; Young, Andrew J

2009-07-01

3

Actionable Intelligence for the Warfighter  

Microsoft Academic Search

1. ABSTRACT Lockheed Martin Advanced Technology Laboratories (LM ATL) has researched and developed Situation Understanding technologies to provide tailored, Actionable Intelligence to the individual warfighter. Situation Understanding (SU) is a core requirement of the Future Combat Systems and programs such as the Distributed Common Ground Station - Army (DCGS-A) and the Aerial Common Sensor (ACS). LM ATL has developed an

Nicholas Morizio; Sergio Gigli; Angela Pawlowski

4

HORIZONTAL INTEGRATION OF WARFIGHTER INTELLIGENCE  

E-print Network

1. Purpose. The purpose of this instruction is to establish policy and procedures for improving the horizontal integration (HI) of warfighter intelligence data. a. HI is the set of processes and capabilities to acquire, synchronize, correlate, and deliver national security community data with responsiveness to ensure success across all policy and operational missions. b. Horizontally integrating warfighter intelligence data improves the consumers ’ production, analysis and dissemination capabilities. HI requires access (including discovery, search, retrieval, and display) to intelligence data among the warfighters and other producers and consumers via standardized services and architectures. These consumers include, but are not limited to, the combatant commands, Services, Defense agencies, and the Intelligence Community. 2. Cancellation. CJCSI 3340.02, 23 December 2005, “Horizontal Integration of Warfighter Intelligence, ” is cancelled. 3. Applicability. This instruction applies to: a. The Services (including the Service intelligence centers), combatant commands, and the Joint Staff. b. The collection, processing and exploitation, analysis and production, and dissemination activities conducted or governed by DOD intelligence agencies. The DOD intelligence agencies are the Defense Intelligence Agency

References See Enclosure C

2008-01-01

5

Point of impact : delivering mission essential supplies to the warfighter through the Joint Precision Airdrop System (JPADS)  

E-print Network

The Joint Precision Airdrop System (JPADS) exists to execute logistical resupply operations using fixed and rotary wing air in a safe, effective and precise manner in order to deliver supplies and equipment to intended ...

Eaton, Joshua A. N. (Joshua Andrew Norman)

2012-01-01

6

Improving information assimilation by modeling warfighter context  

NASA Astrophysics Data System (ADS)

In order to wage successful campaigns, the next generation of intelligence analysts and battle commanders will need to assimilate an enormous amount of information that will come from a wide range of heterogeneous data sources. Complicating this problem further is the fact that warfighters need to be able to manage information in an environment of rapidly changing events and priorities. The consequence of not addressing this problem, or not addressing it as effectively as hostile forces do, is a potential loss of assets, personnel, or tactical advantage. To design effective information displays there needs to be an extensible framework that models the warfighters context including characteristics of the information sources being displayed, the current Intelligence Surveillance Reconnaissance (ISR) picture or Common Operating Picture (COP), the warfighters current state and task, and the state of the information display. BINAH (Battlespace Information and Notification through Adaptive Heuristics) uses an agent-based modeling approach coupled with research into temporal and spatial reasoning, novel display management techniques, and development of a formal high-level language for describing model-based information configuration. The result is an information configuration pipeline designed to provide perceptual and cognitive analysis support to Air Force analysts engaged in Time-Critical Targeting target nomination. It has been integrated with the Air Force Research Laboratory's (AFRL) XML-based Joint Battlespace Infosphere (JBI) combat information management system and combines JBI delivered sensor data with a local user model and display strategies to configure a geospatial information display. The BINAH framework will provide a firm grounding for developing new C4ISR displays that maximize the ability of warfighters to assimilate the information presented.

Zaientz, Jack D.; Wood, Scott D.; Hawkins, Robert L.

2005-05-01

7

Delivering SSA Capabilities to the Warfighter  

Microsoft Academic Search

The Space Superiority Systems Wing at the Space and Missile Center (SMC\\/SY) equips US forces with Offensive Counterspace (OCS), Defensive Counterspace (DCS), and Space Situation Awareness (SSA) systems that further enhance space superiority. The Technology Division (SYT) mission is to identify, develop, and transition cutting-edge technologies to the warfighter. SYT invests in the most relevant technologies for SSA, DCS and

J. van Weezendonk; J. Sherk; T. Ryan; R. McGuire

2006-01-01

8

Training table to the battlefield: protein recommendations for warfighters.  

PubMed

Warfighters represent a population of athletes for whom routine training and physical expectations for military operations parallel, and very often exceed, those of their civilian counterparts. Like athletes, warfighters require nutrition support to optimize physical condition to maintain training, sustain performance, speed recovery, and prevent injury and illness. Specifically, energy and protein requirements have been tailored for these populations. Like athletes, warfighters consider protein a critical component of their diet and often incorporate protein supplements into daily diet plans. This article highlights sports nutrition principles that target energy and protein needs of athletes, considers the basis of these recommendations in the context of protein supplementation, and asserts that translating these recommendations to the warfighter is appropriate and necessary. The recommended range of protein intake of 1.2-1.8 g · kg (- 1) · d (- 1) can be extended to the warfighter. Because energy balance is pivotal to optimal protein utilization, adequate energy intake or lack thereof such that a state of negative energy balance exists, should be given particular consideration for the warfighter. Routine protein supplementation is recommended to reduce protein breakdown, support protein synthesis, and promote a positive net protein balance throughout various deployment situations and when energy intake is insufficient. PMID:24027183

Rodriguez, Nancy R

2013-11-01

9

Recent Advances in Computational Mechanics of the Human Knee Joint  

PubMed Central

Computational mechanics has been advanced in every area of orthopedic biomechanics. The objective of this paper is to provide a general review of the computational models used in the analysis of the mechanical function of the knee joint in different loading and pathological conditions. Major review articles published in related areas are summarized first. The constitutive models for soft tissues of the knee are briefly discussed to facilitate understanding the joint modeling. A detailed review of the tibiofemoral joint models is presented thereafter. The geometry reconstruction procedures as well as some critical issues in finite element modeling are also discussed. Computational modeling can be a reliable and effective method for the study of mechanical behavior of the knee joint, if the model is constructed correctly. Single-phase material models have been used to predict the instantaneous load response for the healthy knees and repaired joints, such as total and partial meniscectomies, ACL and PCL reconstructions, and joint replacements. Recently, poromechanical models accounting for fluid pressurization in soft tissues have been proposed to study the viscoelastic response of the healthy and impaired knee joints. While the constitutive modeling has been considerably advanced at the tissue level, many challenges still exist in applying a good material model to three-dimensional joint simulations. A complete model validation at the joint level seems impossible presently, because only simple data can be obtained experimentally. Therefore, model validation may be concentrated on the constitutive laws using multiple mechanical tests of the tissues. Extensive model verifications at the joint level are still crucial for the accuracy of the modeling. PMID:23509602

Kazemi, M.; Dabiri, Y.; Li, L. P.

2013-01-01

10

Recent advances in computational mechanics of the human knee joint.  

PubMed

Computational mechanics has been advanced in every area of orthopedic biomechanics. The objective of this paper is to provide a general review of the computational models used in the analysis of the mechanical function of the knee joint in different loading and pathological conditions. Major review articles published in related areas are summarized first. The constitutive models for soft tissues of the knee are briefly discussed to facilitate understanding the joint modeling. A detailed review of the tibiofemoral joint models is presented thereafter. The geometry reconstruction procedures as well as some critical issues in finite element modeling are also discussed. Computational modeling can be a reliable and effective method for the study of mechanical behavior of the knee joint, if the model is constructed correctly. Single-phase material models have been used to predict the instantaneous load response for the healthy knees and repaired joints, such as total and partial meniscectomies, ACL and PCL reconstructions, and joint replacements. Recently, poromechanical models accounting for fluid pressurization in soft tissues have been proposed to study the viscoelastic response of the healthy and impaired knee joints. While the constitutive modeling has been considerably advanced at the tissue level, many challenges still exist in applying a good material model to three-dimensional joint simulations. A complete model validation at the joint level seems impossible presently, because only simple data can be obtained experimentally. Therefore, model validation may be concentrated on the constitutive laws using multiple mechanical tests of the tissues. Extensive model verifications at the joint level are still crucial for the accuracy of the modeling. PMID:23509602

Kazemi, M; Dabiri, Y; Li, L P

2013-01-01

11

A Joint Meeting of Associations for the Advancement of Science  

Microsoft Academic Search

MY suggestion for a joint meeting of the British, Australasian, and American Associations for the Advancement of Science at San Francisco in 1897, at some time conveniently near to that of the Toronto meeting of the British Association, published in your issue of October 24, meets favourable reception in the United States and Canada. I have recently received a letter

Wm. H. Hale

1895-01-01

12

Joint Institute for Advancement of Flight Sciences  

NASA Technical Reports Server (NTRS)

The program objectives were defined in the original proposal entitled "Program of Research in Flight Dynamics in the JIAFS at NASA Langley Research Center" which was originated March 20, 1975, and in yearly renewals of the research program dated December 1, 1979 to December 1, 1998. The program included three major topics: 1) Improvement of existing methods and development of new methods for flight and wind tunnel data analysis based on system identification methodology. 2) Application of these methods to flight and wind tunnel data obtained from advanced aircraft. 3) Modeling and control of aircraft, space structures and spacecraft. The principal investigator of the program was Dr. Vladislav Klein, Professor at The George Washington University, Washington, D.C.. Thirty-seven Graduate Research Scholar Assistants, two of them doctoral students, also participated in the program. The results of the research conducted during nineteen years of the total co-operative period were published in 23 NASA technical reports, 2 D.Sc. Dissertations, 14 M.S. Theses and 33 papers. The list of these publications is included. The results were also reported in more than 30 seminar lectures presented at various research establishments world-wide. For contributions to the research supported by the co-operative agreement, three NASA Awards were received: 1) NASA LARC Group Achievement Award, May 30, 1990, to Dr. V. Klein as a member of the X-29 Drop Model Team. 2) NASA Medal for Exceptional Engineering Achievement, March 27, 1992, to Dr. V. Klein for innovative contributions in the development of advanced techniques and computer programs in the field of system identification. 3) NASA LaRC Team Excellence Award, May 7, 1994, to Dr. V. Klein as a member of the X-31 Drop Model Team.

1998-01-01

13

Development of a comprehensive logistics and warfighting simulation system.  

SciTech Connect

An efficient logistics system is critical to the success of military operations. Recently, the Department of Defense (DoD) has begun to move from a ''just in case'' logistics system that relies on large stores of inventoried materials toward a ''just in time'' system based on obtaining and delivering supplies when and where they are needed. For this new logistics concept to operate smoothly and responsively and be highly robust, one must understand the interrelationships between warfighting and logistics, such as the impact of losses of logistics links/nodes and the changing pace of warfighting operations. Two DoD programs, the Distributed Intelligent Agents for Logistics (DIAL) and the Warfighting Logistics Technology and Assessment Environment (WLTAE), are focusing on different aspects of this problem. These programs are being integrated to develop a Comprehensive Logistics and Warfighting System (CLAWS) that can be used to address a variety of different logistics applications in the military arena. In this paper, we describe how CLAWS will be developed, including the development of a generalized Federation Object Model that could be used in a variety of logistics and military operations applications.

Hummel, J. R.

1998-08-12

14

Warfighter-in-the-loop: mental models in airborne minefield detection  

Microsoft Academic Search

The warfighter analyst in the data processing ground control station plays an integral role in airborne minefield detection system. This warfighter-in-the-loop (WIL) is expected to reduce the minefield false alarm rate by a factor of 5. In order to achieve such a significant false alarm reduction and to facilitate the development of an efficient WIL interface, it is critical to

Madhu Reddy; Sanjeev Agarwal; Richard Hall; John Brown; Thomas Woodard; Anh Trang

2005-01-01

15

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

The development of several types of graphite/polyimide (GR/PI) bonded and bolted joints is reported. The program consists of two concurrent tasks: (1) design and test of specific built up attachments; and (2) evaluation of standard advanced bonded joint concepts. A data base for the design and analysis of advanced composite joints for use at elevated temperatures (561K (550 deg F)) to design concepts for specific joining applications, and the fundamental parameters controlling the static strength characteristics of such joints are evaluated. Data for design and build GR/PI of lightly loaded flight components for advanced space transportation systems and high speed aircraft are presented. Results for compression and interlaminar shear strengths of Celion 6000/PMR-15 laminates are given. Static discriminator test results for type 3 and type 4 bonded and bolted joints and final joint designs for TASK 1.4 scale up fabrication and testing are presented.

1981-01-01

16

Joint Leveling for Advanced Kienbock’s Disease  

PubMed Central

PURPOSE The use of joint leveling procedures to treat Kienbock’s disease has been limited by the degree of disease advancement. This study was designed to compare clinical and radiographic outcomes of wrists with more advanced Kienbock’s disease (stage IIIB) to wrists with less advanced disease (stage II/IIIA) following radius shortening osteotomy. METHODS This retrospective study enrolled 31 adult wrists (30 patients, mean age 39 years), treated by radius shortening osteotomy between two institutions for either stage IIIB (n=14) or stage II/IIIA (n=17) disease. Evaluation was carried out at a mean of 74 months (IIIB, 77 months; II/IIIA, 72 months). Radiographic assessment determined disease progression. Clinical outcomes were determined by validated patient-based and objective measures. RESULTS Patient-based outcome ratings of wrists treated for stage IIIB were similar to those with stage II/IIIA [QuickDASH (15 vs 12:p=.63), MMWS (84 vs 87:p=.59), VAS pain (1.2 vs 1.7:p=.45), VAS function (2.6 vs 2.1:p=.59)]. The average flexion/extension arc was 102° for wrists with stage IIIB and 106° for wrists with stage II/IIIA Kienbock’s (p=.70). Grip strength was 77% of the opposite side for stage IIIB wrists versus 85% for stage II/IIIA (p=.25). Postoperative carpal height ratio and radioscaphoid angle were worse (p<.05) for wrists treated for stage IIIB (0.46:65°) than stage II/IIIA (0.53:53°) disease. Radiographic disease progression occurred in 7 wrists (6 stage II/IIIA: 1 stage IIIB). The one stage IIIB wrist that progressed underwent wrist arthrodesis. CONCLUSIONS In this limited series, clinical outcomes of radius shortening using validated, patient-based assessment instruments and objective measures failed to demonstrate predicted “clinically relevant” differences between stage II/IIIA and IIIB Kienbock’s. Provided the high percentage successful clinical outcomes in this case series of 14 stage IIIB wrists, we believe that static carpal malalignment does not preclude radius shortening osteotomy. Level of Evidence IV; retrospective case series PMID:20971577

Calfee, Ryan P.; Van Steyn, Marlo O.; Gyuricza, Cassie; Adams, Amelia; Weiland, Andrew J.; Gelberman, Richard H.

2010-01-01

17

The Analysis of Adhesively Bonded Advanced Composite Joints Using Joint Finite Elements  

NASA Technical Reports Server (NTRS)

The design and sizing of adhesively bonded joints has always been a major bottleneck in the design of composite vehicles. Dense finite element (FE) meshes are required to capture the full behavior of a joint numerically, but these dense meshes are impractical in vehicle-scale models where a course mesh is more desirable to make quick assessments and comparisons of different joint geometries. Analytical models are often helpful in sizing, but difficulties arise in coupling these models with full-vehicle FE models. Therefore, a joint FE was created which can be used within structural FE models to make quick assessments of bonded composite joints. The shape functions of the joint FE were found by solving the governing equations for a structural model for a joint. By analytically determining the shape functions of the joint FE, the complex joint behavior can be captured with very few elements. This joint FE was modified and used to consider adhesives with functionally graded material properties to reduce the peel stress concentrations located near adherend discontinuities. Several practical concerns impede the actual use of such adhesives. These include increased manufacturing complications, alterations to the grading due to adhesive flow during manufacturing, and whether changing the loading conditions significantly impact the effectiveness of the grading. An analytical study is conducted to address these three concerns. Furthermore, proof-of-concept testing is conducted to show the potential advantages of functionally graded adhesives. In this study, grading is achieved by strategically placing glass beads within the adhesive layer at different densities along the joint. Furthermore, the capability to model non-linear adhesive constitutive behavior with large rotations was developed, and progressive failure of the adhesive was modeled by re-meshing the joint as the adhesive fails. Results predicted using the joint FE was compared with experimental results for various joint configurations, including double cantilever beam and single lap joints.

Stapleton, Scott E.; Waas, Anthony M.

2012-01-01

18

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

The design and evaluation of built-up attachments and bonded joint concepts for use at elevated temperatures is documented. Joint concept screening, verification of GR/PI material, fabrication of design allowables panels, definition of test matrices, and analysis of bonded and bolted joints are among the tasks completed. The results provide data for the design and fabrication of lightly loaded components for advanced space transportation systems and high speed aircraft.

Koumal, D. E.

1979-01-01

19

Utah-Inha Joint Research Center on Drug Delivery Systems & Advanced Therapeutics  

E-print Network

Utah-Inha Joint Research Center on Drug Delivery Systems & Advanced Therapeutics Inha University Hospital http://www.unidds.com MISSION AND VISION: The Utah-Inha Joint Research Center on Drug Delivery therapeutics, controlled release, and targeted drug delivery from University of Utah's Department

Tipple, Brett

20

Virtual Welded-Joint Design Integrating Advanced Materials and Processing Technologies  

Microsoft Academic Search

The primary goal of this project is to increase the fatigue life of a welded-joint by 10 times and to reduce energy use by 25% through product performance and productivity improvements using an integrated modeling approach. The fatigue strength of a welded-joint is currently the bottleneck to design high performance and lightweight welded structures using advanced materials such as high

Z. Yang; P. Dong; S. Liu; S. Babu; G. Olson; T. DebRoy

2005-01-01

21

Individual warfighter effectiveness and survivability in a CBRN threat environment  

NASA Astrophysics Data System (ADS)

The effort described in this paper attempts to enhance the state-of-the-art to model high-fidelity (hi-fi) dismounted infantry interactions with a realistic Chemical, Biological, Radiological, Nuclear (CBRN) hazard. There is limited CBRN Modeling & Simulation (M&S) capability for research, training and doctrine development. Although numerous ground and plume hazards simulations exist, few model the entire problem space. To this end, the following three hi-fi simulations were federated: 1) The Infantry Warrior Simulation (IWARS); 2) The Command Control, and Communications Human Performance Model (C3HPM); and, 3) The CBRN Simulation Suite via High Level Architecture (HLA) using the Modeling Architecture for Technology, Research and EXperimentation (MATREX) architecture. The goal of this federation is to provide an integrated capability that will allow analysis of CBRN sensors and Warfighter protective equipment in the context of a complex battlefield environment with dismounted infantry missions/tactics. The IWARS provides representation of dismounted entities and their decisions/physical tasks in a battlefield environment. The C3HPM provides task degradation data due to presence of various CBRN threats and due to wearing of CBRN protective equipment. The CBRN Sim Suite provides dynamic threat events/propagation, high fidelity CBRN sensor representations with tactical message output, CBRN injury based on exposure dosage/concentration and entity protection.

Schleper, Roger; Gaughan, Chris; Kierzewski, Michael O.; Dunmire, Carolyn; Salvi, Luci; Fann, Joey; Kellihan, Bret

2010-04-01

22

Warfighter information services: lessons learned in the intelligence domain  

NASA Astrophysics Data System (ADS)

A vision was presented in a previous paper of how a common set of services within a framework could be used to provide all the information processing needs of Warfighters. Central to that vision was the concept of a "Virtual Knowledge Base". The paper presents an implementation of these ideas in the intelligence domain. Several innovative technologies were employed in the solution, which are presented and their benefits explained. The project was successful, validating many of the design principles for such a system which had been proposed in earlier work. Many of these principles are discussed in detail, explaining lessons learned. The results showed that it is possible to make vast improvements in the ability to exploit available data, making it discoverable and queryable wherever it is from anywhere within a participating network; and to exploit machine reasoning to make faster and better inferences from available data, enabling human analysts to spend more of their time doing more difficult analytical tasks rather than searching for relevant data. It was also demonstrated that a small number of generic Information Processing services can be combined and configured in a variety of ways (without changing any software code) to create "fact-processing" workflows, in this case to create different intelligence analysis capabilities. It is yet to be demonstrated that the same generic services can be reused to create analytical/situational awareness capabilities for logistics, operations, planning or other military functions but this is considered likely.

Bray, S. E.

2014-05-01

23

Virtual Welded - Joint Design Integrating Advanced Materials and Processing Technology  

SciTech Connect

Virtual Welede-Joint Design, a systematic modeling approach, has been developed in this project to predict the relationship of welding process, microstructure, properties, residual stress, and the ultimate weld fatique strength. This systematic modeling approach was applied in the welding of high strength steel. A special welding wire was developed in this project to introduce compressive residual stress at weld toe. The results from both modeling and experiments demonstrated that more than 10x fatique life improvement can be acheived in high strength steel welds by the combination of compressive residual stress from the special welding wire and the desired weld bead shape from a unique welding process. The results indicate a technology breakthrough in the design of lightweight and high fatique performance welded structures using high strength steels.

Yang, Zhishang; Ludewig, Howard W.; Babu, S. Suresh

2005-06-30

24

Joint crisis plans and psychiatric advance directives in German psychiatric practice.  

PubMed

This study explores the attitude of German psychiatrists in leading positions towards joint crisis plans and psychiatric advance directives. This topic was examined by contacting 473 medical directors of German psychiatric hospitals and departments. They were asked to complete a questionnaire developed by us. That form contained questions about the incidence and acceptance of joint crisis plans and psychiatric advance directives and previous experiences with them. 108 medical directors of psychiatric hospitals and departments responded (response rate: 22.8%). Their answers demonstrate that in their hospitals these documents are rarely used. Among the respondents, joint crisis plans are more accepted than psychiatric advance directives. There is a certain uncertainty when dealing with these instruments. Our main conclusion is that German psychiatry needs an intensified discussion on the use of instruments for patients to constitute procedures for future critical psychiatric events. For this purpose it will be helpful to collect more empirical data. Furthermore, the proposal of joint crisis plans in psychiatric hospitals and departments should be discussed as well as the possibility of consulting an expert during the preparation of a psychiatric advance directive. PMID:23793058

Radenbach, Katrin; Falkai, Peter; Weber-Reich, Traudel; Simon, Alfred

2014-05-01

25

Creep Strength of Dissimilar Welded Joints Using High B-9Cr Steel for Advanced USC Boiler  

NASA Astrophysics Data System (ADS)

The commercialization of a 973 K (700 °C) class pulverized coal power system, advanced ultra-supercritical (A-USC) pressure power generation, is the target of an ongoing research project initiated in Japan in 2008. In the A-USC boiler, Ni or Ni-Fe base alloys are used for high-temperature parts at 923 K to 973 K (650 °C to 700 °C), and advanced high-Cr ferritic steels are planned to be used at temperatures lower than 923 K (650 °C). In the dissimilar welds between Ni base alloys and high-Cr ferritic steels, Type IV failure in the heat-affected zone (HAZ) is a concern. Thus, the high B-9Cr steel developed at the National Institute for Materials Science, which has improved creep strength in weldments, is a candidate material for the Japanese A-USC boiler. In the present study, creep tests were conducted on the dissimilar welded joints between Ni base alloys and high B-9Cr steels. Microstructures and creep damage in the dissimilar welded joints were investigated. In the HAZ of the high B-9Cr steels, fine-grained microstructures were not formed and the grain size of the base metal was retained. Consequently, the creep rupture life of the dissimilar welded joints using high B-9Cr steel was 5 to 10 times longer than that of the conventional 9Cr steel welded joints at 923 K (650 °C).

Tabuchi, Masaaki; Hongo, Hiromichi; Abe, Fujio

2014-10-01

26

Fatigue Performance of Advanced High-Strength Steels (AHSS) GMAW Joints  

SciTech Connect

The fatigue performance of gas metal arc welding (GMAW) joints of advanced high strength steels (AHSS) are compared and analyzed. The steel studied included a number of different grades of AHSS and baseline mild steels: DP600, DP780, DP980, M130, M220, solution annealed boron steel, fully hardened boron steels, HSLA690 and DR210 (a mild steel). Fatigue testing was conducted under a number of nominal stress ranges to obtain the S/N curves of the weld joints. A two-phase analytical model is developed to predict the fatigue performance of AHSS welds. It was found that there are appreciable differences in the fatigue S/N curves among different AHSS joints made using the same welding practices, suggesting that the local microstructure in the weld toe and root region plays non-negligible role in the fatigue performance of AHSS welds. Changes in weld parameters can influence the joint characteristics which in turn influence fatigue life of the weld joints, particularly of those of higher strength AHSS. The analytical model is capable of reasonably predicting the fatigue performance of welds made with various steel grades in this study.

Feng, Zhili [ORNL; Sang, Yan [AET Integration, Inc; Jiang, Cindy [AET Integration, Inc; Chiang, Dr. John [Ford Motor Company; Kuo, Dr. Min [MIttal Steel

2009-01-01

27

Oil shale, tar sand, coal research advanced exploratory process technology, jointly sponsored research  

SciTech Connect

Accomplishments for the past quarter are presented for the following five tasks: oil shale; tar sand; coal; advanced exploratory process technology; and jointly sponsored research. Oil shale research covers oil shale process studies. Tar sand research is on process development of Recycle Oil Pyrolysis and Extraction (ROPE) Process. Coal research covers: coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology includes: advanced process concepts;advanced mitigation concepts; and oil and gas technology. Jointly sponsored research includes: organic and inorganic hazardous waste stabilization; CROW field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; PGI demonstration project; operation and evaluation of the CO[sub 2] HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid state NMR analysis of Mesaverde Group, Greater Green River Basin, tight gas sands; flow-loop testing of double-wall pipe for thermal applications; characterization of petroleum residue; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process; NMR analysis of samples from the ocean drilling program; in situ treatment of manufactured gas plant contaminated soils demonstration program; and solid state NMR analysis of naturally and artificially matured kerogens.

Speight, J.G.

1992-01-01

28

Environmental Space Situational Awareness and Joint Space Effects  

Microsoft Academic Search

It is well known that successful military operations rely on our ability to effectively integrate weather information into the planning and execution of land, air and sea operations. What is not so well known are the implications of environmental effects on space capabilities and the subsequent impact on the delivery of joint space effects to the warfighter. This paper provides

K. Hand

2006-01-01

29

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

Results of an experimental program to develop several types of graphite/polyimide (GR/PI) bonded and bolted joints for lightly loaded flight components for advanced space transportation systems and high speed aircraft are presented. Tasks accomplished include: a literature survey; design of static discriminator specimens; design allowables testing; fabrication of test panels and specimens; small specimen testing; and standard joint testing. Detail designs of static discriminator specimens for each of the four major attachment types are presented. Test results are given for the following: (1) transverse tension of Celion 3000/PMR-15 laminate; (2) net tension of a laminate for both a loaded and unloaded bolt hole; (3) comparative testing of bonded and co-cured doublers along with pull-off tests of single and double bonded angles; (4) single lap shear tests, transverse tension and coefficient of thermal expansion tests of A7F (LARC-13 amide-imide modified) adhesive; and (5) tension tests of standard single lap, double lap, and symmetric step lap bonded joints. Also, included are results of a finite element analysis of a single lap bonded composite joint.

Barclay, D. L.

1980-01-01

30

Dynamic modeling and optimal joint torque coordination of advanced robotic systems  

NASA Astrophysics Data System (ADS)

The development is documented of an efficient dynamic modeling algorithm and the subsequent optimal joint input load coordination of advanced robotic systems for industrial application. A closed-form dynamic modeling algorithm for the general closed-chain robotic linkage systems is presented. The algorithm is based on the transfer of system dependence from a set of open chain Lagrangian coordinates to any desired system generalized coordinate set of the closed-chain. Three different techniques for evaluation of the kinematic closed chain constraints allow the representation of the dynamic modeling parameters in terms of system generalized coordinates and have no restriction with regard to kinematic redundancy. The total computational requirement of the closed-chain system model is largely dependent on the computation required for the dynamic model of an open kinematic chain. In order to improve computational efficiency, modification of an existing open-chain KIC based dynamic formulation is made by the introduction of the generalized augmented body concept. This algorithm allows a 44 pct. computational saving over the current optimized one (O(N4), 5995 when N = 6). As means of resolving redundancies in advanced robotic systems, local joint torque optimization is applied for effectively using actuator power while avoiding joint torque limits. The stability problem in local joint torque optimization schemes is eliminated by using fictitious dissipating forces which act in the necessary null space. The performance index representing the global torque norm is shown to be satisfactory. In addition, the resulting joint motion trajectory becomes conservative, after a transient stage, for repetitive cyclic end-effector trajectories. The effectiveness of the null space damping method is shown. The modular robot, which is built of well defined structural modules from a finite-size inventory and is controlled by one general computer system, is another class of evolving, highly versatile, advanced robotic systems. Therefore, finally, a module based dynamic modeling algorithm is presented for the dynamic coordination of such reconfigurable modular robotic systems. A user interactive module based manipulator analysis program (MBMAP) has been coded in C language running on 4D/70 Silicon Graphics.

Kang, Hee-Jun

31

Thermal and electrical joint test for the helical field coils in the Advanced Toroidal Facility  

SciTech Connect

Initial feasibility studies of a number of configurations for the Advanced Toroidal Facility (ATF) resulted in the selection of a resistive copper continuous-coil torsatron as the optimum device considering the physics program, cost, and schedule. Further conceptual design work was directed toward optimization of this configuration and, if possible, a shorter schedule. It soon became obvious that in order to shorten the schedule, a number of design and fabrication activities should proceed in parallel. This was most critical for the vacuum vessel and the helical field (HF) coils. If the HF coils were wound in place on a completed vacuum vessel, the overall schedule would be significantly (greater than or equal to12 months) longer. The approach of parallel scheduel paths requires that the HF coils be segmented into parts of less than or equal to180 of poloidal angle and that joints be made on a turn-by-turn basis when the segments are installed. It was obvious from the outset that the compact and complex geometry of the joint design presented a special challenge in the areas of reliability, assembly, maintenance, disassembly, and cost. Also, electrical, thermal, and force excursions are significant for these joints. A number of soldered, welded, brazed, electroplated, and bolted joints were evaluated. The evaluations examined fabrication feasibility and complexity, thermal-electrical performance at approximately two-thirds of the steady-state design conditions, and installation and assembly processes. Results of the thermal-electrical tests were analyzed and extrapolated to predict performance at peak design parameters. The final selection was a lap-type joint clamped with insulated bolts that pass through the winding packing. 3 refs., 4 figs.

Brown, R.L.; Johnson, R.L.

1985-01-01

32

Virtual Welded-Joint Design Integrating Advanced Materials and Processing Technologies  

SciTech Connect

The primary goal of this project is to increase the fatigue life of a welded-joint by 10 times and to reduce energy use by 25% through product performance and productivity improvements using an integrated modeling approach. The fatigue strength of a welded-joint is currently the bottleneck to design high performance and lightweight welded structures using advanced materials such as high strength steels. In order to achieve high fatigue strength in a welded-joint it is necessary to manage the weld bead shape for lower stress concentration, produce preferable residual stress distribution, and obtain the desired microstructure for improved material toughness and strength. This is a systems challenge that requires the optimization of the welding process, the welding consumable, the base material, as well as the structure design. The concept of virtual welded-joint design has been proposed and established in this project. The goal of virtual welded-joint design is to develop a thorough procedure to predict the relationship of welding process, microstructure, property, residual stress, and the ultimate weld fatigue strength by a systematic modeling approach. The systematic approach combines five sub-models: weld thermal-fluid model, weld microstructure model, weld material property model, weld residual stress model, and weld fatigue model. The systematic approach is thus based on interdisciplinary applied sciences including heat transfer, computational fluid dynamics, materials science, engineering mechanics, and material fracture mechanics. The sub-models are based on existing models with further development. The results from modeling have been validated with critical experiments. The systematic modeling approach has been used to design high fatigue resistant welds considering the combined effects of weld bead geometry, residual stress, microstructure, and material property. In particular, a special welding wire has been developed in this project to introduce compressive residual stress at weld toe for weld fatigue resistance.

Yang, Z.; Dong, P.; Liu, S.; Babu, S.; Olson, G.; DebRoy, T.

2005-04-15

33

A Multi-Objective Advanced Design Methodology of Composite Beam-to-Column Joints Subjected to Seismic and Fire Loads  

SciTech Connect

A multi-objective advanced design methodology dealing with seismic actions followed by fire on steel-concrete composite full strength joints with concrete filled tubes is proposed in this paper. The specimens were designed in detail in order to exhibit a suitable fire behaviour after a severe earthquake. The major aspects of the cyclic behaviour of composite joints are presented and commented upon. The data obtained from monotonic and cyclic experimental tests have been used to calibrate a model of the joint in order to perform seismic simulations on several moment resisting frames. A hysteretic law was used to take into account the seismic degradation of the joints. Finally, fire tests were conducted with the objective to evaluate fire resistance of the connection already damaged by an earthquake. The experimental activity together with FE simulation demonstrated the adequacy of the advanced design methodology.

Pucinotti, Raffaele [Department of Mechanics and Materials, Mediterranean University of Reggio Calabria, loc. Feo di Vito, Reggio Calabria, 89126 (Italy); Ferrario, Fabio; Bursi, Oreste S. [Department of Mechanical and Structural Engineering, University of Trento, via Mesiano 7, Trento, 38050 (Italy)

2008-07-08

34

Oil shale, tar sand, coal research, advanced exploratory process technology, jointly sponsored research  

SciTech Connect

Progress made in five research programs is described. The subtasks in oil shale study include oil shale process studies and unconventional applications and markets for western oil shale.The tar sand study is on recycle oil pyrolysis and extraction (ROPE) process. Four tasks are described in coal research: underground coal gasification; coal combustion; integrated coal processing concepts; and sold waste management. Advanced exploratory process technology includes: advanced process concepts; advanced mitigation concepts; and oil and gas technology. Jointly sponsored research covers: organic and inorganic hazardous waste stabilization; CROW field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; PGI demonstration project; operation and evaluation of the CO[sub 2] HUFF-N-PUFF process; fly ash binder for unsurfaced road aggregates; solid state NMR analysis of Mesaverde group, Greater Green River Basin, tight gas sands; flow-loop testing of double-wall pipe for thermal applications; shallow oil production using horizontal wells with enhanced oil recovery techniques; NMR analysis of sample from the ocean drilling program; and menu driven access to the WDEQ hydrologic data management system.

Not Available

1992-01-01

35

A New Perspective on Fatigue Performance of Advanced High- Strength Steels (AHSS) GMAW Joints  

SciTech Connect

Weld fatigue performance is a critical aspect for application of advanced high-strength steels (AHSS) in automotive body structures. A comparative study has been conducted to evaluate the fatigue life of AHSS welds. The material studied included seven AHSS of various strength levels - DP 600, DP 780, DP 980, M130, M220, solution annealed boron and fully hardened boron steels. Two conventional steels, HSLA 590 and DR 210, were also included for baseline comparison. Lap fillet welds were made on 2-mm nominal thick sheets by the gas metal arc welding process (GMAW). Fatigue test was conducted under a number of stress levels to obtain the S/N curves of the weld joints. It was found that, unlike in the static and impact loading conditions, the fatigue performance of AHSS is not influenced by the HAZ softening in AHSS. There are appreciable differences in the fatigue lives among different AHSS. Changes in weld parameters can influence the fatigue life of the weld joints, particularly of these of higher strength AHSS. A model is developed to predict the fatigue performance of AHSS welds. The validity of the model is benchmarked with the experimental results. This model is capable to capture the effects of weld geometry and weld microstructure and strength on the fatigue performance experimentally observed. The theoretical basis and application of the newly developed fatigue modeling methodology will be discussed.

Feng, Zhili [ORNL; Chiang, Dr. John [Ford Motor Company; Kuo, Dr. Min [MIttal Steel; Jiang, Cindy [AET Integration, Inc; Sang, Yan [AET Integration, Inc

2008-01-01

36

Comparison of arthrodesis, resurfacing hemiarthroplasty, and total joint replacement in the treatment of advanced hallux rigidus.  

PubMed

The purpose of the present study was to compare the functional results of arthrodesis, resurfacing hemiarthroplasty, and total joint replacement in hallux rigidus. The data from patients treated from 2006 to 2010 for advanced stage hallux rigidus were retrospectively reviewed. A total of 38 patients who had at least 2 years (range 24 to 66 months, mean 31.1) of follow-up were included in the present study. Of the 38 patients, 12 were included in the total joint replacement group (group A), 14 in the resurfacing hemiarthroplasty group (group B), and 12 in the arthrodesis group (group C). At the last follow-up visit, the functional outcomes were evaluated using the American Orthopaedic Foot and Ankle Society-Hallux Metatarsophalangeal Interphalangeal (AOFAS-HMI) scale, visual analog scale (VAS), and metatarsophalangeal range of motion. Significant improvements were seen in the AOFAS-HMI score, with a decrease in the VAS score in all 3 groups. According to the AOFAS-HMI score, no significant difference was found between groups A and B. However, in group C, the AOFAS-HMI scores were significantly lower than in the other groups owing to the lack of motion. According to the final VAS scores, no significant difference was found between groups A and B; however, the VAS score had decreased significantly more in group C than in the other groups. No major complications occurred in any of the 3 groups. After 2 years of follow-up, all the groups had good functional outcomes. Although arthrodesis is still the most reliable procedure, implant arthroplasty is also a good alternative for advanced stage hallux rigidus. PMID:23659913

Erdil, Mehmet; Elmada?, Nuh Mehmet; Polat, Gökhan; Tunçer, Nejat; Bilsel, Kerem; Uçan, Vahdet; Erkoçak, Omer Faruk; Sen, Cengiz

2013-01-01

37

Naval Aviation Vision 2014 2025 Naval Aviation is a warfighting force. Its capabilities and capacity have been  

E-print Network

#12;#12;Naval Aviation Vision 2014 ­ 2025 2 Naval Aviation is a warfighting force. Its capabilities and emerging security environment are unstable and uncertain; balancing budgetary challenges and the need for national defense demand that Naval Aviation fulfill more global commitments while operating within tighter

38

An advancement in analytical modelling of soil-infilled rock joints and their practical applications  

Microsoft Academic Search

An infilled rock joint is likely to be the weakest plane in a rock mass. The most pronounced effect of the presence of infill material is the reduction in friction of the discontinuity boundaries (i.e. rock to rock contact of the joint walls). The thicker the infill, the smaller the shear strength of the rock joint. Once the infill reaches

David Americo Fortuna Oliveira

2009-01-01

39

Using Simulation to investigate a Non-Anthropomorphic Framework for Communications within a Human-Agent WarFighting Team  

Microsoft Academic Search

As complex, non-human agents become increasingly ubiquitous members of the US military war-fighting team, an effective and natural system of communications must be explored and developed to achieve human-agent collaboration across the entire team. A non-anthropomorphic communications framework does not exist that will support human-agent collaboration beyond current electronic control. This research surfaces a non-anthropomorphic framework of communications between human-human,

Michael Proctor; Gilbert Cardona; Christopher Hollander

2008-01-01

40

HYDROGEN STORAGE SOLUTIONS IN SUPPORT OF DOD WARFIGHTER PORTABLE POWER APPLICATIONS  

SciTech Connect

From Personal Digital Assistants (PDAs) to cell phones our high-tech world, today, is demanding smaller, lighter weight and higher capacity portable power devices. Nowhere has this personal power surge been more evident than in today's U.S Warfighter. The modern Warfighter is estimated to carry from 65 to 95 pounds of supplies in the field with over 30 pounds of this dedicated to portable power devices. These devices include computer displays, infrared sights, Global Positioning Systems (GPS), night vision and a variety of other sensor technologies. Over 80% of the energy needed to power these devices comes from primary (disposable) batteries. It is estimated that a brigade will consume as much as 7 tons of batteries in a 72 hour mission at a cost of $700,000. A recent comprehensive study on the energy needs of the future warrior published by the National Academy of Science in 2004 made a variety of recommendations for average power systems from 20 to 1,000 watts. For lower power systems recommendations included pursuing science and technology initiatives focused on: (1) 300 watt-hours per kilogram (Wh/kg) secondary battery technologies; (2) smart hybrids; and (3) fuel cells (with greater than 6 wt% hydrogen storage). Improved secondary (rechargeable) batteries may be the ideal solution for military power systems due to their ease of use and public acceptance. However, a 3X improvement in their specific energy density is not likely anytime soon. Today's Lithium Ion batteries, at about 150 Wh/kg, fall well short of the energy density that is required. Future battery technology may not be the answer since many experts do not predict more than a 2X improvement in Lithium battery systems over the next 10 years. That is why most auto companies have abandoned all electric vehicles in favor of fuel cells and hybrid vehicles. Fuel cells have very high specific energy densities but achieving high energy values will depend on the energy density and the storage method of its fuel. Improved methods of safely and efficiently storing larger amounts of hydrogen will be a key development area for portable fuel cell power systems. Despite their high potential energy, fuel cells exhibit low power densities. That is why many systems today are going hybrid. Hybrid systems typically combine low energy and high power components with high energy and low power components. Typical configurations include capacitors and fuel cells or batteries and fuel cells. If done correctly, a hybrid system often can have both high energy and high power density even higher than any of the individual components.

Motyka, T.

2009-01-06

41

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

Bonded and bolted designs are presented for each of four major attachment types. Prepreg processing problems are discussed and quality control data are given for lots 2W4604, 2W4632 and 2W4643. Preliminary design allowables test results for tension tests and compression tests of laminates are included. The final small specimen test matrix is defined and the configuration of symmetric step-lap joint specimens are shown. Finite element modeling studies of a double lap joint were performed to evaluate the number of elements required through the adhesive thickness to assess effects of various joint parameters on stress distributions. Results of finite element analyses assessing the effect of an adhesive fillet on the stress distribution in a double lap joint are examined.

Skoumal, D. E.

1980-01-01

42

III JOINT SYMPOSIUM OF TAIWAN-RUSSIA RESEARCH COOPERATION ON ADVANCED PROBLEMS IN  

E-print Network

COOPERATION ON ADVANCED PROBLEMS IN INTELLIGENT MECHATRONICS, MECHANICS AND CONTROL PROCEEDINGS Venue a maximum distance during the period, are constructed. The material presented in this paper is based

Kaplan, Alexander

43

Advanced time series synthesizer for simulation of joint rain attenuation conditions  

NASA Astrophysics Data System (ADS)

contribution presents a model to generate time series of rain attenuation by adapting a large set of rain attenuation measurements to different locations. The proposed model allows generating rainy and not rainy conditions for multiple stations in a large geographical area, reproducing the actual spatial and temporal variability of the rain process, with limited computational effort. Single site and joint statistics of rain attenuation obtained by the time series of measurements are discussed. The model is used to show the effectiveness, in terms of link margin, of gateway networks in smart diversity arrangement, for different separation distances among sites.

Nebuloni, R.; Capsoni, C.; Luccini, M.

2014-09-01

44

Sensitivity of Solder Joint Fatigue to Sources of Variation in Advanced Vehicular Power Electronics Cooling  

SciTech Connect

This paper demonstrates a methodology for taking variation into account in thermal and fatigue analyses of the die attach for an inverter of an electric traction drive vehicle. This method can be used to understand how variation and mission profile affect parameters of interest in a design. Three parameters are varied to represent manufacturing, material, and loading variation: solder joint voiding, aluminum nitride substrate thermal conductivity, and heat generation at the integrated gate bipolar transistor. The influence of these parameters on temperature and solder fatigue life is presented. The heat generation loading variation shows the largest influence on the results for the assumptions used in this problem setup.

Vlahinos, A.; O'Keefe, M.

2010-06-01

45

Application of advanced imaging modalities for the diagnosis of metastatic adenocarcinoma of the lungs in the temporomandibular joint.  

PubMed

Several pathologies, including malignant diseases, may mimic temporomandibular disorders (TMD). Correct diagnosis is important to avoid treatment delay. Several new imaging diagnostic modalities are available and should be used accordingly. This is a case report of a 71-year-old woman with functional limitation and painful symptoms in the preauricular region. She was initially diagnosed and treated as TMD, however with no improvement of the symptoms. Advanced imaging studies were requested. Computerized tomography and magnetic resonance imaging findings were consistent with soft tissue tumor with nonhomogeneous content in the left temporomandibular joint region. Positron emission tomography showed significant radiotracer uptake in the site of the lesion as well as in the lungs, lumbar spine, and bladder, suggesting tumoral metastases. This report emphasizes the importance of imaging in the assessment and establishment of accurate differential diagnosis. Thorough knowledge of the available modalities and their indications is essential to avoid delay in treatment and improve outcomes. PMID:19464641

Shintaku, Werner H; Venturin, Jaqueline S; Yepes, Juan F

2009-06-01

46

Ergonomic design considerations for an optical data link between a warfighter's head and body-worn technologies  

NASA Astrophysics Data System (ADS)

Today, warfighters are burdened by a web of cables linking technologies that span the head and torso regions of the body. These cables help to provide interoperability between helmet-worn peripherals such as head mounted displays (HMDs), cameras, and communication equipment with chest-worn computers and radios. Although promoting enhanced capabilities, this cabling also poses snag hazards and makes it difficult for the warfighter to extricate himself from his kit when necessary. A newly developed wireless personal area network (WPAN), one that uses optical transceivers, may prove to be an acceptable alternative to traditional cabling. Researchers at the Air Force Research Laboratory's 711th Human Performance Wing are exploring how best to mount the WPAN transceivers to the body in order to facilitate unimpeded data transfer while also maintaining the operator's natural range of motion. This report describes the two-step research process used to identify the performance limitations and usability of a body-worn optical wireless system. Firstly, researchers characterized the field of view for the current generation of optical WPAN transceivers. Then, this field of view was compared with anthropometric data describing the range of motion of the cervical vertebrae to see if the data link would be lost at the extremes of an operator's head movement. Finally, this report includes an additional discussion of other possible military applications for an optical WPAN.

Trew, Noel; Linn, Aaron; Nelson, Zac; Burnett, Greg; Sedillo, Mike

2012-06-01

47

The Integration of Modeling and Simulation with Joint Command and Control on the Global Information Grid  

Microsoft Academic Search

As documented in the Joint Command and Control (JC2) Capability Development Document (CDD), JC2 will require M&S capabilities to support a multitude of functions including course of action analysis, planning, mission rehearsal, and training. This will necessitate the integration of M&S with JC2 on the Global Information Grid (GIG), the net-centric information environment of future warfighting. DISA has been successfully

Leslie S. Winters; Andreas Tolk

2005-01-01

48

Distance Learning in Advanced Military Education: Analysis of Joint Operations Course in the Taiwan Military  

ERIC Educational Resources Information Center

High-ranking officers require advanced military education in war tactics for future combat. However, line officers rarely have time to take such courses on campus. The conventional solution to this problem used to take the inefficient correspondence courses. Whereas Internet technologies progress, online course is the current trend for military…

Tung, Ming-Chih; Huang, Jiung-yao; Keh, Huan-Chao; Wai, Shu-shen

2009-01-01

49

A New Perspective on Fatigue Performance of Advanced High Strength Steels (AHSS) GMAW Joints  

Microsoft Academic Search

Weld fatigue performance is a critical aspect for application of advanced high-strength steels (AHSS) in automotive body structures. A comparative study has been conducted to evaluate the fatigue life of AHSS welds. The material studied included seven AHSS of various strength levels - DP 600, DP 780, DP 980, M130, M220, solution annealed boron and fully hardened boron steels. Two

Zhili Feng; John Chiang; Min Kuo; Cindy Jiang; Yan Sang

2008-01-01

50

Joint System Prognostics For Increased Efficiency And Risk Mitigation In Advanced Nuclear Reactor Instrumentation and Control  

SciTech Connect

The science of prognostics is analogous to a doctor who, based on a set of symptoms and patient tests, assesses a probable cause, the risk to the patient, and a course of action for recovery. While traditional prognostics research has focused on the aspect of hydraulic and mechanical systems and associated failures, this project will take a joint view in focusing not only on the digital I&C aspect of reliability and risk, but also on the risks associated with the human element. Model development will not only include an approximation of the control system physical degradation but also on human performance degradation. Thus the goal of the prognostic system is to evaluate control room operation; to identify and potentially take action when performance degradation reduces plant efficiency, reliability or safety.

Donald D. Dudenhoeffer; Tuan Q. Tran; Ronald L. Boring; Bruce P. Hallbert

2006-08-01

51

Advances in tribological testing of artificial joint biomaterials using multidirectional pin-on-disk testers.  

PubMed

The introduction of numerous formulations of Ultra-high molecular weight polyethylene (UHMWPE), which is widely used as a bearing material in orthopedic implants, necessitated screening of bearing couples to identify promising iterations for expensive joint simulations. Pin-on-disk (POD) testers capable of multidirectional sliding can correctly rank formulations of UHMWPE with respect to their predictive in vivo wear behavior. However, there are still uncertainties regarding POD test parameters for facilitating clinically relevant wear mechanisms of UHMWPE. Studies on the development of POD testing were briefly summarized. We systematically reviewed wear rate data of UHMWPE generated by POD testers. To determine if POD testing was capable of correctly ranking bearings and if test parameters outlined in ASTM F732 enabled differentiation between wear behavior of various formulations, mean wear rates of non-irradiated, conventional (25-50kGy) and highly crosslinked (?90kGy) UHMWPE were grouped and compared. The mean wear rates of non-irradiated, conventional and highly crosslinked UHMWPEs were 7.03, 5.39 and 0.67mm(3)/MC. Based on studies that complied with the guidelines of ASTM F732, the mean wear rates of non-irradiated, conventional and highly crosslinked UHMWPEs were 0.32, 0.21 and 0.04mm(3)/km, respectively. In both sets of results, the mean wear rate of highly crosslinked UHMPWE was smaller than both conventional and non-irradiated UHMWPEs (p<0.05). Thus, POD testers can compare highly crosslinked and conventional UHMWPEs despite different test parameters. Narrowing the allowable range for standardized test parameters could improve sensitivity of multi-axial testers in correctly ranking materials. PMID:23831149

Baykal, D; Siskey, R S; Haider, H; Saikko, V; Ahlroos, T; Kurtz, S M

2014-03-01

52

Advanced Forward Modeling and Inversion of Stokes Profiles Resulting from the Joint Action of the Hanle and Zeeman Effects  

E-print Network

A big challenge in solar and stellar physics in the coming years will be to decipher the magnetism of the solar outer atmosphere (chromosphere and corona) along with its dynamic coupling with the magnetic fields of the underlying photosphere. To this end, it is important to develop rigorous diagnostic tools for the physical interpretation of spectropolarimetric observations in suitably chosen spectral lines. Here we present a computer program for the synthesis and inversion of Stokes profiles caused by the joint action of atomic level polarization and the Hanle and Zeeman effects in some spectral lines of diagnostic interest, such as those of the He I 10830 A and D_3 multiplets. It is based on the quantum theory of spectral line polarization, which takes into account all the relevant physical mechanisms and ingredients (optical pumping, atomic level polarization, Zeeman, Paschen-Back and Hanle effects). The influence of radiative transfer on the emergent spectral line radiation is taken into account through a suitable slab model. The user can either calculate the emergent intensity and polarization for any given magnetic field vector or infer the dynamical and magnetic properties from the observed Stokes profiles via an efficient inversion algorithm based on global optimization methods. The reliability of the forward modeling and inversion code presented here is demonstrated through several applications, which range from the inference of the magnetic field vector in solar active regions to determining whether or not it is canopy-like in quiet chromospheric regions. This user-friendly diagnostic tool called "HAZEL" (from HAnle and ZEeman Light) is offered to the astrophysical community, with the hope that it will facilitate new advances in solar and stellar physics.

A. Asensio Ramos; J. Trujillo Bueno; E. Landi Degl'Innocenti

2008-04-16

53

Oil shale, tar sand, coal research advanced exploratory process technology, jointly sponsored research. Quarterly technical progress report, October--December 1992  

SciTech Connect

Accomplishments for the past quarter are presented for the following five tasks: oil shale; tar sand; coal; advanced exploratory process technology; and jointly sponsored research. Oil shale research covers oil shale process studies. Tar sand research is on process development of Recycle Oil Pyrolysis and Extraction (ROPE) Process. Coal research covers: coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology includes: advanced process concepts;advanced mitigation concepts; and oil and gas technology. Jointly sponsored research includes: organic and inorganic hazardous waste stabilization; CROW field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; PGI demonstration project; operation and evaluation of the CO{sub 2} HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid state NMR analysis of Mesaverde Group, Greater Green River Basin, tight gas sands; flow-loop testing of double-wall pipe for thermal applications; characterization of petroleum residue; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process; NMR analysis of samples from the ocean drilling program; in situ treatment of manufactured gas plant contaminated soils demonstration program; and solid state NMR analysis of naturally and artificially matured kerogens.

Speight, J.G.

1992-12-31

54

Oil shale, tar sand, coal research, advanced exploratory process technology, jointly sponsored research. Quarterly technical progress report, January--March 1993  

SciTech Connect

Accomplishments for the past quarter are briefly described for the following areas of research: oil shale; tar sand; coal; advanced exploratory process technology; and jointly sponsored research. Oil shale and tar sand researches cover processing studies. Coal research includes: coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology covers: advanced process concepts; advanced mitigation concepts; and oil and gas technology. Jointly sponsored research includes: organic and inorganic hazardous waste stabilization; CROW{sup TM} field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; operation and evaluation of the CO{sub 2} HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid-state NMR analysis of Mesaverde Group, Greater Green River Basin tight gas sands; characterization of petroleum residue; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process; oil field waste cleanup using tank bottom recovery process; remote chemical sensor development; in situ treatment of manufactured gas plant contaminated soils demonstration program; solid-state NMR analysis of naturally and artificially matured kerogens; and development of an effective method for the clean-up of natural gas.

Not Available

1993-09-01

55

PREFACE: Joint IPPP Durham/Cockcroft Institute/ICFA Workshop on Advanced QED methods for Future Accelerators  

NASA Astrophysics Data System (ADS)

The joint IPPP Durham/Cockcroft Institute/ICFA workshop on advanced QED methods for future accelerators took place at the Cockcroft Institute in early March 2009. The motivation for the workshop was the need for a detailed consideration of the physics processes associated with beam-beam effects at the interaction points of future high-energy electron-positron colliders. There is a broad consensus within the particle physics community that the next international facility for experimental high-energy physics research beyond the Large Hadron Collider at CERN should be a high-luminosity electron-positron collider working at the TeV energy scale. One important feature of such a collider will be its ability to deliver polarised beams to the interaction point and to provide accurate measurements of the polarisation state during physics collisions. The physics collisions take place in very dense charge bunches in the presence of extremely strong electromagnetic fields of field strength of order of the Schwinger critical field strength of 4.4×1013 Gauss. These intense fields lead to depolarisation processes which need to be thoroughly understood in order to reduce uncertainty in the polarisation state at collision. To that end, this workshop reviewed the formalisms for describing radiative processes and the methods of calculation in the future strong-field environments. These calculations are based on the Furry picture of organising the interaction term of the Lagrangian. The means of deriving the transition probability of the most important of the beam-beam processes - Beamsstrahlung - was reviewed. The workshop was honoured by the presentations of one of the founders, V N Baier, of the 'Operator method' - one means for performing these calculations. Other theoretical methods of performing calculations in the Furry picture, namely those due to A I Nikishov, V I Ritus et al, were reviewed and intense field quantum processes in fields of different form - namely those present in intense lasers - were also presented. Within the Furry picture the lowest order physics processes are represented by one vertex Feynman diagrams. Additionally, higher order processes in the Furry picture are thought to be important and are still not fully studied. The Advanced QED methods workshop also benefited greatly from reports on ongoing and planned experimental work on quantum processes in intense external fields. Some of the experiments reviewed were the NA43 and NA63 experiments using the inter atomic fields in aligned crystals at CERN. In the past, evidence has been obtained from successful experiments using an intense laser at the SLAC experiment E144. The possibility now exists for new experiments with intense laser light with the planned XFEL at DESY and the European Extreme Light Infrastructure. For upcoming accelerator projects, computer simulations of the first order processes in the Furry Picture during the bunch-bunch collision are being performed using the programs CAIN and Guinea-Pig++. The implementation of spin dynamics in these simulation programs was reported on at the workshop. This relatively small workshop generated a very productive intermix of theoretical, experimental and computational developments covering this important field of physics. Fruitful discussions took place covering improvements to the models, estimations of the remaining theoretical uncertainties and future updates to the existing simulations. It was felt that ongoing workshops in the same field would be of benefit to all those involved. The organisers would like to express their sincere thanks to all of the attendees for their contributions, to the staff of the Cockcroft Institute for hosting the workshop, to the IPPP at Durham for providing substantial funding and administrative support, and to ICFA for their sponsorship. We would also like to thank IOP Publishing for their assistance in publishing our proceedings in the Journal of Physics: Conference Series.

Bailey, I. R.; Barber, D. P.; Chattopadhyay, S.; Hartin, A.; Heinzl, T.; Hesselbach, S.; Moortgat-Pick, G. A.

2009-11-01

56

Joint swelling  

MedlinePLUS

Swelling of a joint ... Joint swelling may occur along with joint pain . The swelling may cause the joint to appear larger or abnormally shaped. Joint swelling can cause pain or stiffness. After an ...

57

Service-Oriented Architecture for Weaponry and Battle Command and Control Systems in Warfighting  

E-print Network

Military is one of many industries that is more computer-dependent than ever before, from soldiers with computerized weapons, and tactical wireless devices, to commanders with advanced battle management, command and control systems. Fundamentally, command and control is the process of planning, monitoring, and commanding military personnel, weaponry equipment, and combating vehicles to execute military missions. In fact, command and control systems are revolutionizing as war fighting is changing into cyber, technology, information, and unmanned warfare. As a result, a new design model that supports scalability, reusability, maintainability, survivability, and interoperability is needed to allow commanders, hundreds of miles away from the battlefield, to plan, monitor, evaluate, and control the war events in a dynamic, robust, agile, and reliable manner. This paper proposes a service-oriented architecture for weaponry and battle command and control systems, made out of loosely-coupled and distributed web servi...

Bassil, Youssef

2012-01-01

58

Oil shale, tar sand, coal research, advanced exploratory process technology, jointly sponsored research. Quarterly technical progress report, April--June 1993  

SciTech Connect

Progress made in five areas of research is described briefly. The subtask in oil shale research is on oil shale process studies. For tar sand the subtask reported is on process development. Coal research includes the following subtasks: Coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology includes the following: Advanced process concepts; advanced mitigation concepts; oil and gas technology. Jointly sponsored research includes: Organic and inorganic hazardous waste stabilization; CROW{sup TM} field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; operation and evaluation of the CO{sup 2} HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid-state NMR analysis of Mesaverde Group, Greater Green River Basin, tight gas sands; characterization of petroleum residua; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process;NMR analysis of samples from the ocean drilling program; oil field waste cleanup using tank bottom recovery process; remote chemical sensor development; in situ treatment of manufactured gas plant contaminated soils demonstration program; solid-state NMR analysis of Mowry formation shale from different sedimentary basins; solid-state NMR analysis of naturally and artificially matured kerogens; and development of effective method for the clean-up of natural gas.

Not Available

1993-09-01

59

Oil shale, tar sand, coal research, advanced exploratory process technology, jointly sponsored research. Quarterly technical progress report, July--September 1992  

SciTech Connect

Progress made in five research programs is described. The subtasks in oil shale study include oil shale process studies and unconventional applications and markets for western oil shale.The tar sand study is on recycle oil pyrolysis and extraction (ROPE) process. Four tasks are described in coal research: underground coal gasification; coal combustion; integrated coal processing concepts; and sold waste management. Advanced exploratory process technology includes: advanced process concepts; advanced mitigation concepts; and oil and gas technology. Jointly sponsored research covers: organic and inorganic hazardous waste stabilization; CROW field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; PGI demonstration project; operation and evaluation of the CO{sub 2} HUFF-N-PUFF process; fly ash binder for unsurfaced road aggregates; solid state NMR analysis of Mesaverde group, Greater Green River Basin, tight gas sands; flow-loop testing of double-wall pipe for thermal applications; shallow oil production using horizontal wells with enhanced oil recovery techniques; NMR analysis of sample from the ocean drilling program; and menu driven access to the WDEQ hydrologic data management system.

Not Available

1992-12-31

60

Research investigations in oil shale, tar sand, coal research, advanced exploratory process technology, and advanced fuels research: Volume 2 -- Jointly sponsored research program. Final report, October 1986--September 1993  

SciTech Connect

Numerous studies have been conducted in five principal areas: oil shale, tar sand, underground coal gasification, advanced process technology, and advanced fuels research. In subsequent years, underground coal gasification was broadened to be coal research, under which several research activities were conducted that related to coal processing. The most significant change occurred in 1989 when the agreement was redefined as a Base Program and a Jointly Sponsored Research Program (JSRP). Investigations were conducted under the Base Program to determine the physical and chemical properties of materials suitable for conversion to liquid and gaseous fuels, to test and evaluate processes and innovative concepts for such conversions, to monitor and determine environmental impacts related to development of commercial-sized operations, and to evaluate methods for mitigation of potential environmental impacts. This report is divided into two volumes: Volume 1 consists of 28 summaries that describe the principal research efforts conducted under the Base Program in five topic areas. Volume 2 describes tasks performed within the JSRP. Research conducted under this agreement has resulted in technology transfer of a variety of energy-related research information. A listing of related publications and presentations is given at the end of each research topic summary. More specific and detailed information is provided in the topical reports referenced in the related publications listings.

Smith, V.E.

1994-09-01

61

ecent advances in tissue-engineered cartilage open the door to new clin-ical treatments of joint lesions. Common to all therapies with in-vitro-  

E-print Network

of methods to support ankle joint arthroplasty using bioengineered autografts. Computer assis- tance allows the feasibility of computer-assist- ed arthroplasty using bioengineered autografts. The ankle joint was chosen in patients as young as 20 years old, where classic therapies like total ankle joint arthroplasty using

62

Hip joints  

NSDL National Science Digital Library

The human hips are an example of a ball-and-socket joint. Ball-and-socket joints have the ability to rotate in a circular motion. The joint where the arm connects to the shoulder is also a type of ball-and-socket joint.

Connie Raab (National Institutes of Health;)

2006-05-17

63

Joints in a Cornstarch Analog  

NSDL National Science Digital Library

Joints are very important to problems in applied geology (fluid flow, slope stability), but three-dimensional exposures of simple joint sets are not readily accessible from my campus. I developed this exercise based on the experiments of Miller (2001) to give students hands-on practice describing and interpreting joints. For the exercise, I prepare a cornstarch-water mixture a few days in advance and pour it into plastic petri dishes. I add a "flaw" to each dish (typically a small pebble). As the cornstarch dries, vertical joints develop. In class, each group of 3-4 students is provided a petri dish of desiccated cornstarch. Students are asked to draw a map of the joints, paying particular attention to intersection angles. (The joints curve to intersect at 90 degrees.) They determine relative ages of the joints using abutting relationships. (Typically 3-6 generations of joints.) Students next dissect the sample and describe the surface textures of the larger joints and the location of the flaw. The cornstarch produces beautiful plumose structure (hackles). Students then interpret the joint propagation direction from the surface textures, and note the origin of the joint. (Typically, a first- or second-generation joint initiates at the flaw.) Students discuss the role of flaws in the initiation of joints in their groups.

Crider, Juliet

64

Joint Special Operations University  

E-print Network

The Joint Special Operations University (JSOU) provides its publications to contribute toward expanding the body of knowledge about joint special operations. JSOU publications advance the insights and recommendations of national security professionals and the Special Operations Forces (SOF) students and leaders for consideration by the SOF community and defense leadership. JSOU is the educational component of the United States Special Operations Command (USSOCOM), MacDill Air Force Base, Florida. The JSOU mission is to educate SOF executive, senior, and intermediate leaders and selected other national and international security decision makers, both military and civilian, through teaching, outreach, and research in the science and art of joint special operations. JSOU provides education to the men and women of SOF and to those who enable the SOF mission in a joint and interagency environment. JSOU conducts research through its Strategic Studies Department where

Brian A. Maher; Ed. D; William S. Wildrick; U. S. Navy; Ret Resident; Senior Fellows; John B. Alexander; Roby C. Barrett, Ph.D.; Joseph D. Celeski; Chuck Cunningham

65

The American Way of Special Operations Warfighting ADP 3-05, Special Operations, describes the role of United States Army Special  

E-print Network

environments in the countries and regions of consequence, Prevent conflict through the application of special operations and conventional deterrence, and when necessary help Win our nation’s wars. It will outline ARSOF’s requirement to provide in the nation’s defense unequalled Surgical Strike and Special Warfare capabilities. Together these two different but mutually supporting forms of special operations comprise the American Way of Special Operations Warfighting. In the nation’s most recent conflicts, success has increasingly depended on our ability to work through like-minded groups or governments and to be as precise as possible in our unilateral application of force. Warfare centered on defeating enemies who cloak themselves in the human activity of the modern, increasingly interdependent, and virtually connected world of the 21st Century has placed a rising premium on special operations forces (SOF) because it is profoundly different from that required to dominate in the traditional Land Domain. Conflict in this emerging domain requires exceptional situational awareness, a profound understanding of foreign culture and fluency in local languages, a high degree of proficiency in small unit combat skills, and the inherent and integrated use

Charles T. Cleveland

66

Joint Disorders  

MedlinePLUS

A joint is where two or more bones come together, like the knee, hip, elbow, or shoulder. Joints can be damaged by many types of injuries or diseases, including Arthritis - inflammation of a joint. It causes pain, stiffness, and swelling. Over time, ...

67

Effect of formation and state of interface on joint strength in friction stir spot welding for advanced high strength steel sheets  

NASA Astrophysics Data System (ADS)

The tensile shear strength and cross tension strength of friction stir spot welded joints were evaluated in the cases of lap joints of 270 N/mm2 grade and 980 N/mm2 grade cold rolled steel sheets with respect to the stir zone area, hardness distribution, and interface condition between the sheets. The results suggested that both the tensile shear strength and cross tension strength were based on the stir zone area and its hardness in both grades of steel. The "hook" shape of the interface also affected the joint strength. However, the joining that occurred across the interfaces had a significant influence on the value of the joint strength in the case of the 270 N/mm2 grade steel.

Taniguchi, Koichi; Matsushita, Muneo; Ikeda, Rinsei; Oi, Kenji

2014-08-01

68

Ceramic joints  

DOEpatents

Butt joints between materials having different coefficients of thermal expansion are prepared having a reduced probability of failure of stress facture. This is accomplished by narrowing/tapering the material having the lower coefficient of thermal expansion in a direction away from the joint interface and not joining the narrow-tapered surface to the material having the higher coefficient of thermal expansion.

Miller, Bradley J. (Worcester, MA); Patten, Jr., Donald O. (Sterling, MA)

1991-01-01

69

Applications of advanced display technology for dismounted combatants (Invited Paper)  

NASA Astrophysics Data System (ADS)

Current military activity has made great use of small Special Tactics / Special Forces teams operating on the ground in forward areas of battle, directing Battlefield Air Operations (BAO), which include close air support, air traffic control management, and target identification and designation. A recent National Priority has been identified to improve the BAO Kit used by these Special Tactics Groups to reduce errors that may lead to unintended ground casualties. The primary objectives of the upgraded BAO Kit are to 1) improve the range and accuracy of target information; 2) eliminate opportunities for error in weapon delivery; 3) link target coordinate information directly into the weapons computer; and 4) reduce the weight carried by the warfighter by 50%. For these warfighters, L-3 Communications Display Systems and its technology partner, Universal Display Corporation, are utilizing advanced OLED display technology to create a powerful flexible display-based communication device. This will reduce the weight carried by the fighter by combining functions of the present computer, GPS equipment, and radio gear carried into the forward areas of battle. This will give the soldier a larger, higher resolution, increased battery life, and much lighter capability for the viewing of tactical information such as battlefield maps, GIS imaging data, command/control plots, and GPS-assisted navigational maps. Further integration of the device with voice and video messaging options will be explored. Both hand-held roll-up devices and wrist-worn devices are envisioned for the final product.

Huffman, David C.

2005-05-01

70

Center to Advance Palliative Care  

MedlinePLUS

... Practice For Patients and Families Partner Sponsor Palliative Care Tools, Training & Technical Assistance The Center to Advance ... The Joint Commission (TJC) Advanced Certification for Palliative Care Programs Learn More Access Featured Resources DY 2012 ...

71

The Advanced Energy Consortium (AEC) is a joint research consortium that will focus on applications of nanotechnology to the exploration and  

E-print Network

of nanotechnology to the exploration and production of oil and gas. The goal of the consortium is to develop for innovative proposals in the field of nanotechnology and microtechnology relating to the oil and gas industry. The objective is to advance nanotechnology and microtechnology, such as nanomaterials, devices, fabrication

Texas at Austin, University of

72

Joint Projects / Joint Seminars October 2013  

E-print Network

Joint Projects / Joint Seminars October 2013 Information Sheet Bilateral Programs (MoU) ­ Joint Projects (JP) / Joint Seminars (JS) FWF has signed bilateral agreements ­ so called "Memorandums of Understanding" (MoU) ­ with several international partner organisations. These agreements usually aim at jointly

Fuchs, Clemens

73

Joint Problems  

MedlinePLUS

... shoulder joint. About 30% of older people have tears in their rotator cuff muscles and tendons, but many have no symptoms. Carpal tunnel syndrome is pressure on a nerve in the wrist and may cause tingling, numbness and pain in the hand. It ... Updated: March 2012 Posted: March 2012

74

Jointly Sponsored Research Program  

SciTech Connect

U.S. Department of Energy (DOE) Cooperative Agreement DE-FC26-98FT40321 funded through the Office of Fossil Energy and administered at the National Energy Technology Laboratory (NETL) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy & Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying highly efficient, nonpolluting energy systems that meet the nation's requirements for clean fuels, chemicals, and electricity in the 21st century. The EERC in partnership with its nonfederal partners jointly performed 131 JSRP projects for which the total DOE cost share was $22,716,634 (38%) and the nonfederal share was $36,776,573 (62%). Summaries of these projects are presented in this report for six program areas: (1) resource characterization and waste management, (2) air quality assessment and control, (3) advanced power systems, (4) advanced fuel forms, (5) value-added coproducts, and (6) advanced materials. The work performed under this agreement addressed DOE goals for reductions in CO{sub 2} emissions through efficiency, capture, and sequestration; near-zero emissions from highly efficient coal-fired power plants; environmental control capabilities for SO{sub 2}, NO{sub x}, fine respirable particulate (PM{sub 2.5}), and mercury; alternative transportation fuels including liquid synfuels and hydrogen; and synergistic integration of fossil and renewable resources.

Everett A. Sondreal; John G. Hendrikson; Thomas A. Erickson

2009-03-31

75

Advances in numerical simulation of turbulent flows; Proceedings of the Symposium, ASME and JSME Joint Fluids Engineering Conference, 1st, Portland, OR, June 23-27, 1991  

Microsoft Academic Search

The present conference discusses the modeling of swirling flows with advanced turbulence closures, algebraic expressions for Reynolds stresses, numerical simulation of 3D developing turbulent flows in a square duct with the anisotropic k-epsilon model, the prediction of normal Reynolds stresses with the nonlinear k-epsilon model, combustor flowfield turbulence modeling with the nonlinear k-epsilon model, and the large-eddy simulation of the

I. Celik; T. Kobayashi; K. N. Ghia; J. Kurokawa

1991-01-01

76

Space station rotary joint mechanisms  

NASA Technical Reports Server (NTRS)

The mechanism which will be used on the space station to position the solar arrays and radiator panels for Sun pointing and Sun avoidance is described. The unique design features will be demonstrated on advanced development models of two of the joints being fabricated under contract to NASA-MSFC.

Driskill, Glen W.

1986-01-01

77

Fluoroscopy-guided sacroiliac joint injections.  

PubMed

The authors performed fluoroscopy-guided sacroiliac (SI) joint injections. With the patient prone and the x-ray tube perpendicular to the fluoroscopic table, the skin was marked over the distal 1 cm of the SI joint. With the tube angled 20 degrees - 25 degrees cephalad, a 22-gauge needle was inserted at the skin mark and advanced perpendicular to the fluoroscopic table toward the posterior joint. Nonionic contrast material was injected to confirm the intraarticular position of the needle. Of 31 SI joint injections, 30 (97%) were intraarticular. Mean procedure time was 108 seconds. This technique is safe, rapid, and reproducible. PMID:10644136

Dussault, R G; Kaplan, P A; Anderson, M W

2000-01-01

78

Advances in numerical simulation of turbulent flows; Proceedings of the Symposium, ASME and JSME Joint Fluids Engineering Conference, 1st, Portland, OR, June 23-27, 1991  

NASA Astrophysics Data System (ADS)

The present conference discusses the modeling of swirling flows with advanced turbulence closures, algebraic expressions for Reynolds stresses, numerical simulation of 3D developing turbulent flows in a square duct with the anisotropic k-epsilon model, the prediction of normal Reynolds stresses with the nonlinear k-epsilon model, combustor flowfield turbulence modeling with the nonlinear k-epsilon model, and the large-eddy simulation of the unsteady turbulent wake of a circular cylinder using FEM. Also discussed are the direct simulation of transient turbulent flows using the generalized method of lines, simulation of 3D shear flows around a nozzle-afterbody, the interface oscillation phenomenon over a cavity in airflow, combustion-wave instabilities in turbulent flows, and modeling the buoyancy-production of dissipation in a plane turbulent plume.

Celik, I.; Kobayashi, T.; Ghia, K. N.; Kurokawa, J.

79

Serum levels of soluble receptor for advanced glycation end products and of S100 proteins are associated with inflammatory, autoantibody, and classical risk markers of joint and vascular damage in rheumatoid arthritis  

PubMed Central

Introduction The receptor for advanced glycation end products (RAGE) is a member of the immunoglobulin superfamily of cell surface receptor molecules. High concentrations of three of its putative proinflammatory ligands, S100A8/A9 complex (calprotectin), S100A8, and S100A12, are found in rheumatoid arthritis (RA) serum and synovial fluid. In contrast, soluble RAGE (sRAGE) may prevent proinflammatory effects by acting as a decoy. This study evaluated the serum levels of S100A9, S100A8, S100A12 and sRAGE in RA patients, to determine their relationship to inflammation and joint and vascular damage. Methods Serum sRAGE, S100A9, S100A8 and S100A12 levels from 138 patients with established RA and 44 healthy controls were measured by ELISA and compared by unpaired t test. In RA patients, associations with disease activity and severity variables were analyzed by simple and multiple linear regressions. Results Serum S100A9, S100A8 and S100A12 levels were correlated in RA patients. S100A9 levels were associated with body mass index (BMI), and with serum levels of S100A8 and S100A12. S100A8 levels were associated with serum levels of S100A9, presence of anti-citrullinated peptide antibodies (ACPA), and rheumatoid factor (RF). S100A12 levels were associated with presence of ACPA, history of diabetes, and serum S100A9 levels. sRAGE levels were negatively associated with serum levels of C-reactive protein (CRP) and high-density lipoprotein (HDL), history of vasculitis, and the presence of the RAGE 82Ser polymorphism. Conclusions sRAGE and S100 proteins were associated not just with RA inflammation and autoantibody production, but also with classical vascular risk factors for end-organ damage. Consistent with its role as a RAGE decoy molecule, sRAGE had the opposite effects to S100 proteins in that S100 proteins were associated with autoantibodies and vascular risk, whereas sRAGE was associated with protection against joint and vascular damage. These data suggest that RAGE activity influences co-development of joint and vascular disease in rheumatoid arthritis patients. PMID:19284577

Chen, Yueh-Sheng; Yan, Weixing; Geczy, Carolyn L; Brown, Matthew A; Thomas, Ranjeny

2009-01-01

80

The Joint Space Operations Center (JSpOC) Mission System (JMS) and the Advanced Research, Collaboration, and Application Development Environment (ARCADE)  

NASA Astrophysics Data System (ADS)

The JSpOC Mission System is a modern service-oriented architecture (SOA) infrastructure with increased process automation and improved tools to enhance Space Situational Awareness (SSA). The JMS program has already delivered Increment 1 in April 2013 as initial capability to operations. The programs current focus, Increment 2, will be completed by 2016 and replace the legacy Space Defense Operations Center (SPADOC) and Astrodynamics Support Workstation (ASW) capabilities. Post 2016, JMS Increment 3 will continue to provide additional SSA and C2 capabilities that will require development of new applications and procedures as well as the exploitation of new data sources with more agility. In 2012, the JMS Program Office entered into a partnership with AFRL/RD (Directed Energy) and AFRL/RV (Space Vehicles) to create the Advanced Research, Collaboration, and Application Development Environment (ARCADE). The purpose of the ARCADE is to: (1) serve as a centralized testbed for all research and development (R&D) activities related to JMS applications, including algorithm development, data source exposure, service orchestration, and software services, and provide developers reciprocal access to relevant tools and data to accelerate technology development, (2) allow the JMS program to communicate user capability priorities and requirements to developers, (3) provide the JMS program with access to state-of-the-art research, development, and computing capabilities, and (4) support market research efforts by identifying outstanding performers that are available to shepherd into the formal transition process. AFRL/RV and AFRL/RD have created development environments at both unclassified and classified levels that together allow developers to develop applications and work with data sources. The unclassified ARCADE utilizes the Maui high performance computing (HPC) Portal, and can be accessed using a CAC or Kerberos using Yubikey. This environment gives developers a sandbox environment to test and benchmark algorithms and services. The classified environments allow these new applications to be integrated with the JMS SOA and other data sources to help mature the capability to TRL 6.

Runco, A.; Echeverry, J.; Kim, R.; Sabol, C.; Zetocha, P.; Murray-Krezan, J.

2014-09-01

81

Knee joint replacement  

MedlinePLUS

Knee joint replacement is surgery to replace a knee joint with a man-made joint. The artificial joint is called a prosthesis . ... cartilage and bone are removed from the knee joint. Man-made pieces are then placed in the ...

82

Rheumatoid arthritis affecting temporomandibular joint  

PubMed Central

Rheumatoid arthritis (RA) is a chronic, systemic, autoimmune inflammatory disorder that is characterized by joint inflammation, erosive properties and symmetric multiple joint involvement. Temporomandibular joint (TMJ) is very rare to be affected in the early phase of the disease, thus posing diagnostic challenges for the dentist. Conventional radiographs fail to show the early lesions due to its limitations. More recently cone-beam computed tomography (CBCT) has been found to diagnose the early degenerative changes of TMJ and hence aid in the diagnosis of the lesions more accurately. Our case highlights the involvement of TMJ in RA and the role of advanced imaging (CBCT) in diagnosing the bony changes in the early phase of the disease.

Sodhi, Amandeep; Naik, Shobha; Pai, Anuradha; Anuradha, Ardra

2015-01-01

83

Joint attention and language evolution  

NASA Astrophysics Data System (ADS)

This study investigates how more advanced joint attentional mechanisms, rather than only shared attention between two agents and an object, can be implemented and how they influence the results of language games played by these agents. We present computer simulations with language games showing that adding constructs that mimic the three stages of joint attention identified in children's early development (checking attention, following attention, and directing attention) substantially increase the performance of agents in these language games. In particular, the rates of improved performance for the individual attentional mechanisms have the same ordering as that of the emergence of these mechanisms in infants' development. These results suggest that language evolution and joint attentional mechanisms have developed in a co-evolutionary way, and that the evolutionary emergence of the individual attentional mechanisms is ordered just like their developmental emergence.

Kwisthout, Johan; Vogt, Paul; Haselager, Pim; Dijkstra, Ton

2008-06-01

84

Joint x-ray  

MedlinePLUS

X-ray - joint; Arthrography; Arthrogram ... x-ray technologist will help you position the joint to be x-rayed on the table. Once in place, pictures are taken. The joint may be moved into other positions for more ...

85

JOINT SEMINAR FINAL REPORT  

E-print Network

JOINT SEMINAR FINAL REPORT Project number Name of applicant at FWF: __________________________________ Title of the Joint Seminar: ____________________________________________________ Name of the partner): ____________________________________________________ Name of applicant at partner organisation: _______________________ Date and place of Joint Seminar

Fuchs, Clemens

86

Temporomandibular Joint Disorder  

MedlinePLUS

... news feeds delivered directly to your desktop! more... Temporomandibular Joint Disorder Article Chapters Temporomandibular Joint Disorder What ... men. Updated: November 2008 Previous Next Related Articles: Temporomandibular Joint Disorder (TMD) Are You Biting Off More ...

87

Spacesuit mobility joints  

NASA Technical Reports Server (NTRS)

Joints for use in interconnecting adjacent segments of an hermetically sealed spacesuit which have low torques, low leakage and a high degree of reliability are described. Each of the joints is a special purpose joint characterized by substantially constant volume and low torque characteristics. Linkages which restrain the joint from longitudinal distension and a flexible, substantially impermeable diaphragm of tubular configuration spanning the distance between pivotally supported annuli are featured. The diaphragms of selected joints include rolling convolutions for balancing the joints, while various joints include wedge-shaped sections which enhance the range of motion for the joints.

Vykukal, H. C. (inventor)

1978-01-01

88

HDFx: a novel biologic immunomodulator is therapeutically -effective in hemorrhagic and intestinal-ischemic shock: importance of microcirculatory-immunological interactions and their potential implications for the warfighter and disaster victims.  

PubMed

Recently, we have reported on the discovery of a new, conserved protein (35-40 kD), termed HDFx, that protects rats, guinea-pigs, mice and rabbits against lethal hemorrhage, endotoxins, and traumatic injury when given, systemically, as a pretreatment. HDFx was also found to stimulate several arms of the immune system. The present report demonstrates, for the first time, that HDFx ,when administered post-hemorrhage and post-intestinal ischemia shock -trauma, yields increased survival rates, elevates falling arterial blood pressures, possesses unique actions in the microvasculature, stimulates depressed RES phagocytosis (normally observed in animals and humans during blood loss, sepsis and trauma), and preserves cytokine levels in lymphocytes obtained from animals subjected to hemorrhage and traumatic shock. We believe that HDFx presents a potential brand new therapeutic approach:1)for the injured warfighter on the battlefield, 2)for victims of major disasters, 3)as an adjunct for patients undergoing high -risk surgical procedures commonly found in open-heart surgery, cancers, and in neurosurgeries. Use of HDFx could potentially allow oncologists to decrease chemotherapy dosing, while increasing patient survival chances. PMID:22140604

Altura, Burton M; Carella, Anthony; Gebrewold, Asefa

2011-01-01

89

HDFx: a novel biologic immunomodulator is therapeutically -effective in hemorrhagic and intestinal-ischemic shock: importance of microcirculatory-immunological interactions and their potential implications for the warfighter and disaster victims  

PubMed Central

Recently, we have reported on the discovery of a new, conserved protein (35-40 kD), termed HDFx, that protects rats, guinea-pigs, mice and rabbits against lethal hemorrhage, endotoxins, and traumatic injury when given, systemically, as a pretreatment. HDFx was also found to stimulate several arms of the immune system. The present report demonstrates, for the first time, that HDFx ,when administered post-hemorrhage and post-intestinal ischemia shock -trauma, yields increased survival rates, elevates falling arterial blood pressures, possesses unique actions in the microvasculature, stimulates depressed RES phagocytosis (normally observed in animals and humans during blood loss, sepsis and trauma), and preserves cytokine levels in lymphocytes obtained from animals subjected to hemorrhage and traumatic shock. We believe that HDFx presents a potential brand new therapeutic approach:1)for the injured warfighter on the battlefield, 2)for victims of major disasters, 3)as an adjunct for patients undergoing high -risk surgical procedures commonly found in open-heart surgery, cancers, and in neurosurgeries. Use of HDFx could potentially allow oncologists to decrease chemotherapy dosing, while increasing patient survival chances. PMID:22140604

Altura, Burton M; Carella, Anthony; Gebrewold, Asefa

2011-01-01

90

Joint ownership and alienability  

Microsoft Academic Search

Most legal traditions view individual ownership as paradigmatic. Yet most property is jointly owned. This paper analyzes how joint ownership affects alienability by focusing on two fundamental issues raised by joint ownership—the nature of the class of those who may benefit from a joint asset and the nature of the process for making decisions about such an asset. I identify

Clifford G. Holderness

2003-01-01

91

Modified joint probabilistic data association with classification-aided for multitarget tracking * * This project was supported by Defense Advanced Research Project “the Techniques of Information Integrated Processing and Fusion” in the Eleventh Five-Year Plan (513060302)  

Microsoft Academic Search

Joint probabilistic data association is an effective method for tracking multiple targets in clutter, but only the target kinematic information is used in measure-to-track association. If the kinematic likelihoods are similar for different closely spaced targets, there is ambiguity in using the kinematic information alone; the correct association probability will decrease in conventional joint probabilistic data association algorithm and track

Ba Hongxin; Cao Lei; He Xinyi; Cheng Qun

2008-01-01

92

Advanced thermionic energy conversion: Joint highlights  

NASA Technical Reports Server (NTRS)

A theoretical model was used to study the effects of structured electrodes on converter I-V characteristics and results are given. An auxiliary-ion-source triode operated as a plasmatron was used for studying the enhancement distribution and magnetic effects, and results are reported. Design features of the high current-zero power (ZEPO) converter tests are given.

1976-01-01

93

Quantitative Radiological Diagnosis Of The Temporomandibular Joint  

NASA Astrophysics Data System (ADS)

Recent impressive technological advances in imaging techniques for the human temporomandibular (tm) joint, and in enabling geometric algorithms have outpaced diagnostic analyses. The authors present a basis for systematic quantitative diagnoses that exploit the imaging advancements. A reference line, coordinate system, and transformations are described that are appropriate for tomography of the tm joint. These yield radiographic measurements (disk displacement) and observations (beaking of radiopaque dye and disk shape) that refine diagnostic classifications of anterior displacement of the condylar disk. The relevance of these techniques has been clinically confirmed. Additional geometric invariants and procedures are proposed for future clinical verification.

Jordan, Steven L.; Heffez, Leslie B.

1989-05-01

94

Adhesive joint and composites modeling in SIERRA.  

SciTech Connect

Polymers and fiber-reinforced polymer matrix composites play an important role in many Defense Program applications. Recently an advanced nonlinear viscoelastic model for polymers has been developed and incorporated into ADAGIO, Sandia's SIERRA-based quasi-static analysis code. Standard linear elastic shell and continuum models for fiber-reinforced polymer-matrix composites have also been added to ADAGIO. This report details the use of these models for advanced adhesive joint and composites simulations carried out as part of an Advanced Simulation and Computing Advanced Deployment (ASC AD) project. More specifically, the thermo-mechanical response of an adhesive joint when loaded during repeated thermal cycling is simulated, the response of some composite rings under internal pressurization is calculated, and the performance of a composite container subjected to internal pressurization, thermal loading, and distributed mechanical loading is determined. Finally, general comparisons between the continuum and shell element approaches for modeling composites using ADAGIO are given.

Ohashi, Yuki; Brown, Arthur A.; Hammerand, Daniel Carl; Adolf, Douglas Brian; Chambers, Robert S.; Foulk, James W., III (.,; )

2005-11-01

95

GIScience 2008 Joint Discussion Session Between SOA & Cyberinfrastructure Workshops  

E-print Network

GIScience 2008 Joint Discussion Session Between SOA & Cyberinfrastructure Workshops 2:00-4:00 p Ontologies Registry) Advanced data and visualization services ­ 2-3 projects at $3M over 5 year cycle 4 types

Wright, Dawn Jeannine

96

Experimental investigation of the scaling of columnar joints  

Microsoft Academic Search

Columnar jointing is a fracture pattern common in igneous rocks in which cracks self-organize into a roughly hexagonal arrangement, leaving behind an ordered colonnade. We report observations of columnar jointing in a laboratory analog system, desiccated corn starch slurries. Using measurements of moisture density, evaporation rates, and fracture advance rates as evidence, we suggest that an advective-diffusive system is responsible

Lucas Goehring; Stephen W. Morris; Zhenquan Lin

2006-01-01

97

Temporomandibular Joint Dysfunction  

MedlinePLUS

The temporomandibular joint (TMJ) connects your jaw to the side of your head. When it works well, it enables you to ... For people with TMJ dysfunction, problems with the joint and muscles around it may cause Pain that ...

98

Joint Aspiration (Arthrocentesis)  

MedlinePLUS

... JIA, formerly called rheumatoid arthritis, or JRA), systemic lupus erythematosus (SLE), and Lyme disease. Joint aspiration is ... Lyme Disease Risk Juvenile Idiopathic Arthritis Living With Lupus Bones, Muscles, and Joints Lyme Disease Arthritis Word! ...

99

Large displacement spherical joint  

DOEpatents

A new class of spherical joints has a very large accessible full cone angle, a property which is beneficial for a wide range of applications. Despite the large cone angles, these joints move freely without singularities.

Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

2002-01-01

100

Arch & Chord Joint Detail; Crossbracing Center Joint Detail; Chord, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Arch & Chord Joint Detail; Crossbracing Center Joint Detail; Chord, Panel Post, Tie & Diagonal Brace Joint Detail; Chord, Panel Post, Tie & Crossbracing Joint Detail - Dunlapsville Covered Bridge, Spanning East Fork Whitewater River, Dunlapsville, Union County, IN

101

Advanced thyristor valve project  

Microsoft Academic Search

General Electrics's thyristor valve project incorporates the most advanced technologies available. With joint funding from the Electric Power Research Institute, commercial application of the separate light-triggered thyristor is now underway. The cesium vapor lamp source to trigger the light sensitive thyristors will reduce component complexity and cost. A unique thermal management feature relies on forced vaporization cooling with Freon-113, which

Damsky

1984-01-01

102

Information management services provided by the Joint Battlespace Infosphere (JBI) Mercury initiative  

NASA Astrophysics Data System (ADS)

The revolution of network centric operations will be achieved incrementally. Information Management is centric to this seamless transition of warfighter capabilities across enclaves, services, and platforms. Air Force Research Lab has teamed with industry, defense, and academic leaders to research and develop technologies to solve the information management needs of the DoD. Joint Battlespace Infosphere Mercury is an AFRL initiative to develop information management software using the best of breed commercial technologies. This session describes (1) the capabilities and goals of JBI Mercury, (2) design highlights and lessons learned, and (3) how to obtain a license-cost free copy of JBI Mercury and collaborate with the JBI community. JBI Mercury provides information management services for publish, subscribe, and query for XML/Binary information across a local or wide area network using Java, C#, and web services bindings. Multiple, dynamic messaging connectors and discovery technologies are mediated by a www.openwings.org compliant framework. The JBI Mercury services are dynamically connectable (dynamic plug-and-play connectors), dynamically configurable to meet mission requirements (context policies), and dynamically replaceable (technology change). Flexibility and reliability are provided by the ability to achieve ad-hoc integration of new users and new service components as they enter or leave the network.

Merrill, Derek

2005-05-01

103

Management of acromioclavicular joint injuries.  

PubMed

Although recent advances have been made in the treatment of acromioclavicular (AC) joint injuries, they are still challenging for shoulder surgeons. There is a consensus that type I and II injuries should be treated nonoperatively, whereas acute type IV, V, and VI injuries should be treated surgically. There is no algorithm for correctly diagnosing and treating type III injuries, but the current trend is toward nonoperative treatment except for those with persistent symptoms and functional limitations after a course of conservative management. If surgery is indicated, newer anatomic techniques of reconstructing the coracoclavicular (CC) and AC ligaments are recommended. PMID:25435035

Stucken, Charlton; Cohen, Steven B

2015-01-01

104

Advancements in HMD technology: the DARPA-sponsored SCENICC program  

NASA Astrophysics Data System (ADS)

In this paper we report on the technical developments of the head worn display (HWD) for DARPA's SCENICC program. The goal of the SCENICC program is to provide the warfighter with vision capabilities exceeding normal human vision. This is being achieved with an advanced imaging system that is able to capture the surrounding scene with superior visual acuity, contrast sensitivity, and wavelength sensitivity. With this increased visual information density, intelligent image processing provides imagery to the wearer's eyes via an advanced HWD. The goal of this HWD is to provide digital visual information at the limits of human perception over a field of view near the human peripheral vision limits. This represents a tremendous amount of information requiring novel concepts in order to achieve such ambitious goals. One important concept is the use of imaging optics located directly on the eye, moving with the eye as it changes its gaze angle. A second concept is the use of demagnification optics to convert a large, low spatial resolution image into a smaller, high spatial resolution image. This is done in conjunction with image processing that is constantly modifying the image presented based on real-time pupil tracking. In addition to enabling a high performance optical system, integrating the imaging optical components into contact lenses eliminates much of the bulky imaging optics from the HWD itself creating a high performance wearable display in a standard protective eyewear form factor. The resulting quantum advance in HWD performance will enable HWDs to expand well beyond their current limited roles.

Sprague, Randall; Zhang, Arthur; Cookson, Scott; Hendricks, Lee; O'Brien, Tyrone; Ford, Joseph; Tremblay, Eric; Rutherford, Todd; Reinert, Doug; Johnson, Adam

2013-05-01

105

Annual Joint Report on Pre-Kindergarten through Higher Education in Tennessee, 2007  

ERIC Educational Resources Information Center

This 2007 Annual Joint Report of the State Board of Education and the Tennessee Higher Education Commission identifies four joint priorities and nine associated goals addressing areas of need in both student learning and educator development for the advancement of education in Tennessee. The joint priorities and initiatives focus on points of…

Tennessee State Board of Education, 2007

2007-01-01

106

Annual Joint Report on Pre-Kindergarten through Higher Education in Tennessee, 2006  

ERIC Educational Resources Information Center

This 2006 Annual Joint Report of the State Board of Education and the Tennessee Higher Education Commission identifies four joint priorities and nine associated goals addressing areas of need in both student learning and educator development for the advancement of education in Tennessee. The joint priorities and initiatives focus on points of…

Tennessee State Board of Education, 2006

2006-01-01

107

Annual Joint Report on Pre-Kindergarten through Higher Education in Tennessee, 2009  

ERIC Educational Resources Information Center

This 2009 Annual Joint Report of the State Board of Education and the Tennessee Higher Education Commission identifies four joint priorities and nine associated goals addressing areas of need in both student learning and educator development for the advancement of education in Tennessee. The joint priorities and initiatives focus on points of…

Tennessee State Board of Education, 2009

2009-01-01

108

Annual Joint Report on Pre-Kindergarten through Higher Education in Tennessee, 2008  

ERIC Educational Resources Information Center

This 2008 Annual Joint Report of the State Board of Education and the Tennessee Higher Education Commission identifies four joint priorities and nine associated goals addressing areas of need in both student learning and educator development for the advancement of education in Tennessee. The joint priorities and initiatives focus on points of…

Tennessee State Board of Education, 2008

2008-01-01

109

An analysis of the flow field in the region of the ASRM field joints  

Microsoft Academic Search

The flow field in the region of a solid rocket motor field joint is very important since fluid dynamic and mechanical propellant stresses can couple to cause a motor failure at a joint. Presented here is an examination of the flow field in the region of the Advanced Solid Rocket Motor (ASRM) field joints. The analyses were performed as a

Richard A. Dill; Harold R. Whitesides

1992-01-01

110

Joint Torque Sensory Feedback in the Control of a PUMA Manipulator  

Microsoft Academic Search

Accurate control of joint forces is essential to achieve high performance in advanced assembly and other tasks that involve fine motion, active force control, or high speed operations. Joint force control can be substantially improved by sensory feedback. In this paper we present the design and describe the actual characteristics of a joint torque sensor for a PUMA 500. Using

Lawrence Pfeffer; Oussama Khatib; John Hake

1986-01-01

111

Mechanics of Suture Joints  

NASA Astrophysics Data System (ADS)

Biological sutures are joints which connect two stiff skeletal or skeletal-like components. These joints possess a wavy geometry with a thin organic layer providing adhesion. Examples of biological sutures include mammalian skulls, the pelvic assembly of the armored fish Gasterosteus aculeatus (the three-spined stickleback), and the suture joints in the shell of the red-eared slider turtle. Biological sutures allow for movement and compliance, control stress concentrations, transmit loads, reduce fatigue stress and absorb energy. In this investigation, the mechanics of the role of suture geometry in providing a naturally optimized joint is explored. In particular, analytical and numerical micromechanical models of the suture joint are constructed. The anisotropic mechanical stiffness and strength are studied as a function of suture wavelength, amplitude and the material properties of the skeletal and organic components, revealing key insights into the optimized nature of these ubiquitous natural joints.

Li, Yaning; Song, Juha; Ortiz, Christine; Boyce, Mary

2011-03-01

112

Sacroiliac joint pain.  

PubMed

The sacroiliac joint is a source of pain in the lower back and buttocks in approximately 15% of the population. Diagnosing sacroiliac joint-mediated pain is difficult because the presenting complaints are similar to those of other causes of back pain. Patients with sacroiliac joint-mediated pain rarely report pain above L5; most localize their pain to the area around the posterior superior iliac spine. Radiographic and laboratory tests primarily help exclude other sources of low back pain. Magnetic resonance imaging, computed tomography, and bone scans of the sacroiliac joint cannot reliably determine whether the joint is the source of the pain. Controlled analgesic injections of the sacroiliac joint are the most important tool in the diagnosis. Treatment modalities include medications, physical therapy, bracing, manual therapy, injections, radiofrequency denervation, and arthrodesis; however, no published prospective data compare the efficacy of these modalities. PMID:15473677

Dreyfuss, Paul; Dreyer, Susan J; Cole, Andrew; Mayo, Keith

2004-01-01

113

14 CFR 151.111 - Advance planning proposals: General.  

Code of Federal Regulations, 2011 CFR

...Procedures for Advance Planning and Engineering Proposals § 151.111 ...Each advance planning and engineering proposal must relate...must relate to planning and engineering for an airport that— ...published jointly by FAA and the Civil Aeronautics Board),...

2011-01-01

114

14 CFR 151.111 - Advance planning proposals: General.  

Code of Federal Regulations, 2012 CFR

...Procedures for Advance Planning and Engineering Proposals § 151.111 ...Each advance planning and engineering proposal must relate...must relate to planning and engineering for an airport that— ...published jointly by FAA and the Civil Aeronautics Board),...

2012-01-01

115

14 CFR 151.111 - Advance planning proposals: General.  

Code of Federal Regulations, 2013 CFR

...Procedures for Advance Planning and Engineering Proposals § 151.111 ...Each advance planning and engineering proposal must relate...must relate to planning and engineering for an airport that— ...published jointly by FAA and the Civil Aeronautics Board),...

2013-01-01

116

Parameter identification for joint elements in a revolute-joint detector manipulator.  

SciTech Connect

A revolute-joint robot is being developed for the spatial positioning of an x-ray detector at the Advanced Photon Source. Commercially available revolute-joint manipulators do not meet our size, positioning, or payload specifications. One idea being considered is the modification of a commercially available robot, with the goal of improving the repeatability and trajectory accuracy. Theoretical, computational, and experimental procedures are being used to (1) identify, (2) simulate the dynamics of an existing robot system using a multibody approach, and eventually (3) design an improved version, with low dynamic positioning uncertainty. A key aspect of the modeling and performance prediction is accurate stiffness and damping values for the robot joints. This paper discusses the experimental identification of the stiffness and damping parameters for one robot harmonic drive joint.

Preissner, C.; Shu, D.; Royston, T.; Experimental Facilities Division (APS); Univ. of Illinois at Chicago

2005-01-01

117

Equivalent Continuum Modeling for Shock Wave Propagation in Jointed Media  

SciTech Connect

This study presents discrete and continuum simulations of shock wave propagating through jointed media. The simulations were performed using the Lagrangian hydrocode GEODYN-L with joints treated explicitly using an advanced contact algorithm. They studied both isotropic and anisotropic joint representations. For an isotropically jointed geologic medium, the results show that the properties of the joints can be combined with the properties of the intact rock to develop an equivalent continuum model suitable for analyzing wave propagation through the jointed medium. For an anisotropically jointed geologic medium, they found it difficult to develop an equivalent continuum (EC) model that matches the response derived from mesoscopic simulation. They also performed simulations of wave propagation through jointed media. Two appraoches are suggested for modeling the rock mass. In one approach, jointed are modeled explicitly in a Lagrangian framework with appropriate contact algorithms used to track motion along the interfaces. In the other approach, the effect of joints is taken into account using a constitutive model derived from mesoscopic simulations.

Vorobiev, O; Antoun, T

2009-12-11

118

Imaging of the temporomandibular joint: An update.  

PubMed

Imaging of the temporomandibular joint (TMJ) is continuously evolving with advancement of imaging technologies. Many different imaging modalities are currently used to evaluate the TMJ. Magnetic resonance imaging is commonly used for evaluation of the TMJ due to its superior contrast resolution and its ability to acquire dynamic imaging for demonstration of the functionality of the joint. Computed tomography and ultrasound imaging have specific indication in imaging of the TMJ. This article focuses on state of the art imaging of the temporomandibular joint. Relevant normal anatomy and biomechanics of movement of the TMJ are discussed for better understanding of many TMJ pathologies. Imaging of internal derangements is discussed in detail. Different arthropathies and common tumors are also discussed in this article. PMID:25170394

Bag, Asim K; Gaddikeri, Santhosh; Singhal, Aparna; Hardin, Simms; Tran, Benson D; Medina, Josue A; Curé, Joel K

2014-08-28

119

Investigation of joint disease  

Microsoft Academic Search

The role of nuclear medicine in the diagnosis and management of the major arthropathies is critically reviewed, with particular reference to osteoarthritis, rheumatoid and similar forms of arthritis, ankylosing spondylitis, non-specific back pain, gout, the neuropathic joint, avascular necrosis, infection and the consequences of prosthetic joint insertion. Attention is drawn both to practical applications and deficiencies in current techniques and

M. V. Merrick

1992-01-01

120

Joint Newspaper Operating Agreements.  

ERIC Educational Resources Information Center

The number of competing daily newspapers in American cities has dwindled until only about 50 cities boast two papers. Of the newspapers in those cities, 23 now maintain separate editorial operations but have joint printing, advertising, and circulation departments. The concept of joint operation is 50 years old, dating from the Depression years…

Parsons, Marie

121

Joining of advanced materials by superplastic deformation  

DOEpatents

A method for utilizing superplastic deformation with or without a novel joint compound that leads to the joining of advanced ceramic materials, intermetallics, and cermets. A joint formed by this approach is as strong as or stronger than the materials joined. The method does not require elaborate surface preparation or application techniques.

Goretta, Kenneth C. (Downers Grove, IL); Routbort, Jules L. (Hinsdale, IL); Gutierrez-Mora, Felipe (Woodridge, IL)

2008-08-19

122

MISR JOINT_AS Data  

Joint Aerosol Product (JOINT_AS) The MISR Level 3 Products are global or regional ... field campaigns at daily and monthly time scales. The Joint Aerosol product provides a monthly global statistical summary of MISR ...

2014-07-21

123

JOINT APPENDICES 2005 BUILDING ENERGY  

E-print Network

JOINT APPENDICES CALIFORNIA ENERGY COMMISSION for the 2005 BUILDING ENERGY EFFICIENCY STANDARDS, Deputy Director ENERGY EFFICIENCY AND DEMAND ANALYSIS DIVISION #12;NOTICE This version of the 2005 Joint. #12;TABLE OF CONTENTS I. Joint Appendix I ­ Glossary ........................................... Pages

124

Joint Infection (Beyond the Basics)  

MedlinePLUS

... medications. Artificial joint infection symptoms — People who develop infections immediately after joint replacement surgery typically have pain, redness, and swelling at the joint or drainage from the wound. Those who develop infections later usually notice a ...

125

Convoy Active Safety Technologies Warfighter Experiment I  

NASA Astrophysics Data System (ADS)

The operational ability to project and sustain forces in distant, anti-access and area denial environments poses new challenges for combatant commanders. One of the new challenges is the ability to conduct sustainment operations at operationally feasible times and places on the battlefield. Combatant commanders require a sustainment system that is agile, versatile, and survivable throughout the range of military operations and across the spectrum of conflict. A key component of conducting responsive, operationally feasible sustainment operations is the ability to conduct sustainment convoys. Sustainment convoys are critical to providing combatant commanders the right support, at the right time and place, and in the right quantities, across the full range of military operations. The ability to conduct sustainment convoys in a variety of hostile environments require force protection measures that address the enemy threat and protect the Soldier. One cost effective, technically feasible method of increasing the force protection for sustainment convoys is the use of robotic follower technology and autonomous navigation. The Convoy Active Safety Technologies (CAST) system is a driver assist, convoy autopilot technology aimed to address these issues. Warfigher Experiment I, held at A.P. Hill, VA in the fall of 2007, tested the utility of this vehicle following technology not only in measures of system integrity and performance vs. manual driving, but also the physiological effects on the operators themselves. This paper will detail the Warfigher Experiment's methodology, analysis, results and conclusions.

Schoenherr, Edward; Theisen, Bernard L.; Animashaun, Asisat; Davis, James, Jr.; Day, Christopher

2008-04-01

126

Wave Propagation in Jointed Geologic Media  

SciTech Connect

Predictive modeling capabilities for wave propagation in a jointed geologic media remain a modern day scientific frontier. In part this is due to a lack of comprehensive understanding of the complex physical processes associated with the transient response of geologic material, and in part it is due to numerical challenges that prohibit accurate representation of the heterogeneities that influence the material response. Constitutive models whose properties are determined from laboratory experiments on intact samples have been shown to over-predict the free field environment in large scale field experiments. Current methodologies for deriving in situ properties from laboratory measured properties are based on empirical equations derived for static geomechanical applications involving loads of lower intensity and much longer durations than those encountered in applications of interest involving wave propagation. These methodologies are not validated for dynamic applications, and they do not account for anisotropic behavior stemming from direcitonal effects associated with the orientation of joint sets in realistic geologies. Recent advances in modeling capabilities coupled with modern high performance computing platforms enable physics-based simulations of jointed geologic media with unprecedented details, offering a prospect for significant advances in the state of the art. This report provides a brief overview of these modern computational approaches, discusses their advantages and limitations, and attempts to formulate an integrated framework leading to the development of predictive modeling capabilities for wave propagation in jointed and fractured geologic materials.

Antoun, T

2009-12-17

127

Arthrodesis of the first metatarsophalangeal joint.  

PubMed

Arthrodesis of the first metatarsophalangeal joint is indicated in patients with symptomatic arthrodesis or advanced hallux valgus deformities that are unresponsive to nonsurgical treatment. Several fixation techniques have been described, including intefragmentary compression screws and/or dorsal plate fixation. Using these modern fixation techniques, the rate of fusion is between 94% to 98%, with high patient satisfaction. Appropriate positioning of the fusion is important for satisfactory outcome. PMID:15948454

Marks, Richard M

2005-01-01

128

JOINT ELECTRICAL & COMPUTER ENGINEERING AND  

E-print Network

JOINT ELECTRICAL & COMPUTER ENGINEERING AND PHYSICS COLLOQUIUM "Speckle Statistics, Coherence confirmation of the increase in the well- defined polarization state of the output radiation. In the joint

129

Advanced thyristor valve project  

SciTech Connect

General Electrics's thyristor valve project incorporates the most advanced technologies available. With joint funding from the Electric Power Research Institute, commercial application of the separate light-triggered thyristor is now underway. The cesium vapor lamp source to trigger the light sensitive thyristors will reduce component complexity and cost. A unique thermal management feature relies on forced vaporization cooling with Freon-113, which equals the thermal performance of water without posing insulation reliability problems. 7 figures.

Damsky, B.L.

1984-01-01

130

Pressure vessel flex joint  

NASA Technical Reports Server (NTRS)

An airtight, flexible joint is disclosed for the interfacing of two pressure vessels such as between the Space Station docking tunnel and the Space Shuttle Orbiter bulkhead adapter. The joint provides for flexibility while still retaining a structural link between the two vessels required due to the loading created by the internal/external pressure differential. The joint design provides for limiting the axial load carried across the joint to a specific value, a function returned in the Orbiter/Station tunnel interface. The flex joint comprises a floating structural segment which is permanently attached to one of the pressure vessels through the use of an inflatable seal. The geometric configuration of the joint causes the tension between the vessels created by the internal gas pressure to compress the inflatable seal. The inflation pressure of the seal is kept at a value above the internal/external pressure differential of the vessels in order to maintain a controlled distance between the floating segment and pressure vessel. The inflatable seal consists of either a hollow torus-shaped flexible bladder or two rolling convoluted diaphragm seals which may be reinforced by a system of straps or fabric anchored to the hard structures. The joint acts as a flexible link to allow both angular motion and lateral displacement while it still contains the internal pressure and holds the axial tension between the vessels.

Kahn, Jon B. (inventor)

1992-01-01

131

First metatarsophalangeal joint arthrodesis.  

PubMed

Arthrodesis of the first metatarsophalangeal joint (MTPJ) is used primarily for end-stage hallux rigidus whereby pain, crepitus, and limitation of motion is noted at the joint. Arthrodesis at the first MTPJ also has it uses as a primary procedure for rheumatoid arthritis when severe deformity is present, as well as for salvage procedures for failed joint arthroplasties with or without implant, fractures with intra-articular extension, avascular necrosis, and infection management. A first MTPJ arthrodesis should provide stable fixation, attain suitable positioning for a reasonable gait, maintain adequate length, and create a stable platform for a plantigrade foot type. PMID:22243568

Rajczy, Robert M; McDonald, Patrick R; Shapiro, Howard S; Boc, Steven F

2012-01-01

132

Compliant Joints For Robots  

NASA Technical Reports Server (NTRS)

Compliant joints devised to accommodate misalignments of tools and/or workpieces with respect to robotic manipulators. Has characteristics and appearance of both universal-joint and cable-spring-type flexible shaft coupling. Compliance derived from elastic properties of short pieces of cable. Compliance of joint determined by lengths, distances between, relative orientations, thickness of strands, number of strands, material, amount of pretwist, and number of short pieces of cable. Worm-drive mechanism used to adjust lengths to vary compliance as needed during operation.

Kerley, James J., Jr.

1990-01-01

133

Panel Post & Diagonal Brace Joint Detail; Crossbracing Center Joint ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Panel Post & Diagonal Brace Joint Detail; Crossbracing Center Joint Detail; Chord, Panel Post, Tie Bar, & Diagonal Brace Joint Detail; Chord, Tie Bar, & Crossbracing Joint Detail - Medora Bridge, Spanning East Fork of White River at State Route 235, Medora, Jackson County, IN

134

Joint fluid Gram stain  

MedlinePLUS

Gram stain of joint fluid ... result means no bacteria are present on the Gram stain. Note: Normal value ranges may vary slightly ... Abnormal results mean bacteria were seen on the Gram stain. This may be a sign of a ...

135

Temporomandibular Joint Disorders  

MedlinePLUS Videos and Cool Tools

... jaw joint. TMJ disorders can cause headaches, ear pain, bite problems, clicking sounds, locked jaws, and other ... three main categories: Muscle Disorders These disorders include pain in the muscles that control jaw function, as ...

136

New plastic joints for plastic orthoses  

Microsoft Academic Search

Plastic joints for orthoses have more advantages than metal joints. They are lightweight, noiseless comfortable to use, rust proof, corrosion free, and radiolucent. Two types of plastic joints were developed by the authors, one for the ankle joint and the other for the knee joint, elbow joint or hip joint. Polypropylene was chosen as the joint material because of its

H. WATANABE; T. KUTSUNA; H. MORINAGA; T. OKABE

137

Bullet in Hip Joint  

PubMed Central

Recently, hip arthroscopy has become more popular in the diagnosis and extraction of intraarticular foreign bodies compared to open surgery. If a foreign object such as a bullet is not extracted from the hip joint, it may cause mechanical arthritis, infection and systemic lead toxicity. We present the arthroscopic excision of a bullet from the hip joint of a 33-year-old male patient who sustained a gunshot injury.

Kaya, Ibrahim; Ugras, Akin; Saglam, Necdet; Sungur, Ibrahim; Cetinus, Ercan

2013-01-01

138

Competing Research Joint Ventures  

Microsoft Academic Search

Research and development (R&D) competition among firms has recently been extended to R&D competition involving research joint ventures. It was previously shown that in an industry conducting cost-reducing R&D followed by competition in the product market, if all firms both fully share R&D information and coordinate investments to maximize joint profits, final products prices are lower, and firms' profits are

Morton I. Kamien; Israel Zang

1993-01-01

139

Instrumented Bolts Would Measure Shear Forces In Joints  

NASA Technical Reports Server (NTRS)

Bolts instrumented with strain gauges used to measure shear forces. Bolts installed in multiple-bolt lap joints to obtain data on distribution of stresses and deformations in and around joints. Strain gauges indicate share of applied load borne by each individual bolt. In original application, bolted panels made of advanced refractory composite materials designed to withstand use at temperatures up to 4,000 degrees F. Also applicable to other joint materials and measurement of shear loads in other connections such as, shear loads on shafts in pulleys or gears.

Sawyer, James Wayne; Mcwithey, Robert R.

1994-01-01

140

High pressure ceramic joint  

DOEpatents

Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures. 4 figures.

Ward, M.E.; Harkins, B.D.

1993-11-30

141

High pressure ceramic joint  

DOEpatents

Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures.

Ward, Michael E. (Poway, CA); Harkins, Bruce D. (San Diego, CA)

1993-01-01

142

Electrical properties of cold-pressing welded NbTi persistent joints  

NASA Astrophysics Data System (ADS)

The cold-pressing welding method is employed to fabricate persistent joints between NbTi multifilamentary conductors, and a series of persistent joints are thus made at different mechanical pressures. The electrical properties of these persistent joints are tested by a joint resistance measurement device based on the current decay measurement method. Test results show that the cold-pressing welding method is reliable and applicable to NMR and MRI applications. Experiment results also shows that the joint resistances and current-carrying capacities of the joints seem to have no apparent relevance to the mechanical pressure in a wide range of 4-20 MPa, but the current decay ratio due to flux creep has obvious relevance to the mechanical pressure. Further research is needed to advance this joint manufacturing technology. Besides, measured current increase under 1 T background magnetic field is observed and explained, which has a reference meaning for testing persistent joint resistances.

Liu, Jianhua; Cheng, Junsheng; Zhou, Feng; Wang, Qiuliang; Chang, Kun; Li, Xian

2013-12-01

143

Adhesively-bonded joints and repairs in metallic alloys, polymers and composite materials: Adhesives, adhesion theories and surface pretreatment  

Microsoft Academic Search

In the present paper, the following topics are reviewed in detail: (a) the available adhesives, as well as their recent advances, (b) thermodynamic factors affecting the surface pretreatments including adhesion theories, wettability, surface energy, (c) bonding mechanisms in the adhesive joints, (d) surface pretreatment methods for the adhesively bonded joints, and as well as their recent advances, and (e) combined

A. Baldan

2004-01-01

144

Dissimilar metals joint evaluation  

NASA Technical Reports Server (NTRS)

Dissimilar metals tubular joints between 2219-T851 aluminum alloy and 304L stainless steel were fabricated and tested to evaluate bonding processes. Joints were fabricated by four processes: (1) inertia (friction) weldings, where the metals are spun and forced together to create the weld; (2) explosive welding, where the metals are impacted together at high velocity; (3) co-extrusion, where the metals are extruded in contact at high temperature to promote diffusion; and (4) swaging, where residual stresses in the metals after a stretching operation maintain forced contact in mutual shear areas. Fifteen joints of each type were prepared and evaluated in a 6.35 cm (2.50 in.) O.D. size, with 0.32 cm (0.13 in.) wall thickness, and 7.6 cm (3.0 in) total length. The joints were tested to evaluate their ability to withstand pressure cycle, thermal cycle, galvanic corrosion and burst tests. Leakage tests and other non-destructive test techniques were used to evaluate the behavior of the joints, and the microstructure of the bond areas was analyzed.

Wakefield, M. E.; Apodaca, L. E.

1974-01-01

145

New Joint Sealants. Criteria, Design and Materials.  

ERIC Educational Resources Information Center

Contents include--(1) sealing concrete joints, (2) sealing glass and metal joints, (3) metal and glass joint sealants from a fabricator's viewpoint, (4) a theory of adhesion for joint sealants, (5) geometry of simple joint seals under strain, (6) joint sealant specifications from a manufacturer's viewpoint, (7) joint sealant requirements from an…

Building Research Inst., Inc., Washington, DC.

146

Joint Space Operations Center (JSpOC) Mission System (JMS)  

NASA Astrophysics Data System (ADS)

US space capabilities benefit the economy, national security, international relationships, scientific discovery, and our quality of life. Realizing these space responsibilities is challenging not only because the space domain is increasingly congested, contested, and competitive but is further complicated by the legacy space situational awareness (SSA) systems approaching end of life and inability to provide the breadth of SSA and command and control (C2) of space forces in this challenging domain. JMS will provide the capabilities to effectively employ space forces in this challenging domain. Requirements for JMS were developed based on regular, on-going engagement with the warfighter. The use of DoD Architecture Framework (DoDAF) products facilitated requirements scoping and understanding and transferred directly to defining and documenting the requirements in the approved Capability Development Document (CDD). As part of the risk reduction efforts, the Electronic System Center (ESC) JMS System Program Office (SPO) fielded JMS Capability Package (CP) 0 which includes an initial service oriented architecture (SOA) and user defined operational picture (UDOP) along with force status, sensor management, and analysis tools. Development efforts are planned to leverage and integrate prototypes and other research projects from Defense Advanced Research Projects Agency, Air Force Research Laboratories, Space Innovation and Development Center, and Massachusetts Institute of Technology/Lincoln Laboratories. JMS provides a number of benefits to the space community: a reduction in operational “transaction time” to accomplish key activities and processes; ability to process the increased volume of metric observations from new sensors (e.g., SBSS, SST, Space Fence), as well as owner/operator ephemerides thus enhancing the high accuracy near-real-time catalog, and greater automation of SSA data sharing supporting collaboration with government, civil, commercial, and foreign entities. Continued success in JMS depends on continued support from across the space community. Key activities where community participation is essential include the C2 SSA Community of Interest (COI) development and refinement, creative strategies for faster, better, cheaper development, and defining the next set of capabilities.

Morton, M.; Roberts, T.

2011-09-01

147

Political economy insights into the defense acquisition process : lessons from the Joint Strike Fighter Program  

E-print Network

The military aircraft industry is a cornerstone of national security and of the economic health of the United States. The Joint Strike Fighter (JSF) program was sold as a solution to a host of needs, from advancing the ...

Hitchings, Sean, 1975-

2004-01-01

148

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This report includes a review of the progress made in ACTF Flow Loop development and research during 90 days pre-award period (May 15-July 14, 1999) and the following three months after the project approval date (July15-October 15, 1999) The report presents information on the following specific subjects; (a) Progress in Advanced Cuttings Transport Facility design and development, (b) Progress report on the research project ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (c) Progress report on the research project ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (d) Progress report on the research project ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (e) Progress report on the research project ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Progress report on the instrumentation tasks (Tasks 11 and 12) (g) Activities towards technology transfer and developing contacts with oil and service company members.

Ergun Kuru; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Len Volk; Mark Pickell; Evren Ozbayoglu; Barkim Demirdal; Paco Vieira; Affonso Lourenco

1999-10-15

149

Joint ETV/NOWATECH test plan for the Sorbisense GSW40 passive sampler  

EPA Science Inventory

The joint test plan is the implementation of a test design developed for verification of the performance of an environmental technology following the NOWATECH ETV method. The verification is a joint verification with the US EPA ETV scheme and the Advanced Monitoring Systems Cent...

150

Estimation of the initial stiffness and moment resistance of steel and composite joints  

Microsoft Academic Search

In the advanced design of framed multi-storey buildings, actual properties of joints and connection should be taken into account. It is namely: initial stiffness and moment resistance of a joint. The best way to obtain theses characteristics is experimental testing, but tests are very costly and time consuming. Based on the results from experiments and numerical analysis, few analytical methods

Aleksander Kozlowski; Ryszard Kowalczyk; Marian Gizejowski

151

Hip joint replacement  

MedlinePLUS

... Jones CA. Total joint arthroplasties: current concepts of patient outcomes after surgery. Rheum Dis Clin North Am . 2007;33(1):71-86. Schmalzried TP. Metal-metal bearing surfaces in hip arthroplasty. Orthopedics . 2009;32. Lindstrom D, Sadr Azodi O, Wladis ...

152

Dolphin Skeleton (Gliding Joint)  

NSDL National Science Digital Library

The dolphin is built to be sleek. Its body is made of almost entirely backbone (a gliding joint) which makes it very flexible under water. The ribs protect the inner organs of the dolphin and the tail beats from side to side, thrusting the animal forward.

Ketan Patel (California State University, Fullerton;)

2007-07-14

153

Clad metal joint closure  

SciTech Connect

A plasma arc spray overlay of cladding metals is used over joints between clad metal pieces to provide a continuous cladding metal surface. The technique permits applying an overlay of a high melting point cladding metal to a cladding metal surface without excessive heating of the backing metal.

Siebert, O.W.

1985-04-09

154

ADVANCE-Nebraska Advancing Women, Advancing STEM  

E-print Network

3/4/2011 1 ADVANCE-Nebraska Advancing Women, Advancing STEM Introductions Co-PIs PI Prem Paul Vice · 49% of STEM women in A&S, Engineering (11% ) · 77% of 's partners are tenure-track (66% of ' partners: Disseminationp p Proposed Program Five Barriers to Gender Equity at UNL 3. Under-recruitment of women to STEM

Farritor, Shane

155

Joint Institute Marine and Atmospheric  

E-print Network

Joint Institute for Marine and Atmospheric Research NATIONALOCEA NIC AND ATMOSPHERIC ADMINISTRATION Contribution 00-328 #12;ii This research is funded by Cooperative Agreement Number NA67RJ0154 between the Joint

Hawai'i at Manoa, University of

156

Research Highlights 2 -31 Highlights of Joint Research 32 -51  

E-print Network

#12;Contents Preface 1 Research Highlights 2 - 31 Highlights of Joint Research 32 - 51 science under extreme conditions, renovation of materials research with advanced beam probes inaugurations of long-awaited beam-line facilities. In October 2009, a new high-brilliance soft X-ray beam

Katsumoto, Shingo

157

Current Activities of the Joint Council on Economic Education.  

ERIC Educational Resources Information Center

Reviews current activities of the Joint Council, among them, a researcher training institute, a new K-12 economic education scope and sequence document, a junior high level test of economic knowledge, an instructional package for advanced placement classes, a textbook conference, a project to help teachers of students who work with at-risk…

Highsmith, Robert J.

1987-01-01

158

Joint Seminar UNIVERSITY OF GEORGIA  

E-print Network

Joint Seminar UNIVERSITY OF GEORGIA DEPARTMENT OF STATISTICS DEPARTMENT OF EPIDEMIOLOGY longitudinal covariates are involved in the modeling of the survival data. A joint likelihood approach has been data. However, in the presence of left truncation, there are additional challenges for the joint

Wang, Lily

159

JOINT PERFORMANCE Guide for Optimum  

E-print Network

July 2012 JOINT PERFORMANCE Guide for Optimum of Concrete Pavements #12; #12;Guide for Optimum Joint Performance of Concrete Pavements i Technical Report Documentation Page 1. Report No. 2. Report Date Guide for Optimum Joint Performance of Concrete Pavements July 2012 6. Performing

160

Double slotted socket spherical joint  

DOEpatents

A new class of spherical joints is disclosed. These spherical joints are capable of extremely large angular displacements (full cone angles in excess of 270.degree.), while exhibiting no singularities or dead spots in their range of motion. These joints can improve or simplify a wide range of mechanical devices.

Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

2001-05-22

161

Joint Degrees & Promotion towards European Students  

E-print Network

Joint Degrees & Promotion towards European Students 26 June 2014 MATTEA CAPELLI & ALESSANDRA GALLERANO INTERNATIONAL OFFICE #12;Joint Degrees and Promotion towards European students Joint degrees guidelines and template for agreements Support to student participation Promotion of Joint Degrees towards

Di Pillo, Gianni

162

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2012 CFR

...Transportation 4 2012-10-01 2012-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2012-10-01

163

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2013 CFR

...Transportation 4 2013-10-01 2013-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2013-10-01

164

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2011 CFR

...Transportation 4 2011-10-01 2011-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2011-10-01

165

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2010 CFR

...Transportation 4 2010-10-01 2010-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2010-10-01

166

Horizontal Advanced Tensiometer  

DOEpatents

An horizontal advanced tensiometer is described that allows the monitoring of the water pressure of soil positions, particularly beneath objects or materials that inhibit the use of previous monitoring wells. The tensiometer includes a porous cup, a pressure transducer (with an attached gasket device), an adaptive chamber, at least one outer guide tube which allows access to the desired horizontal position, a transducer wire, a data logger and preferably an inner guide tube and a specialized joint which provides pressure on the inner guide tube to maintain the seal between the gasket of the transducer and the adaptive chamber.

Hubbell, Joel M.; Sisson, James B.

2004-06-22

167

Finger Joint Injuries.  

PubMed

Finger joint dislocations and collateral ligament tears are common athletic hand injuries. Treatment of the athlete requires a focus on safe return to play and maximizing function. Certain dislocations, such as proximal interphalangeal and distal interphalangeal volar dislocations, may be associated with tendon injuries and must be treated accordingly. Treatment of other dislocations is ultimately determined by postreduction stability, with many dislocations amenable to nonoperative treatment (ie, immobilization followed by rehabilitation). Protective splinting does not necessarily preclude athletic participation. Minor bone involvement typically does not affect the treatment plan, but significant articular surface involvement may necessitate surgical repair or stabilization. Percutaneous and internal fixation are the mainstays of surgical treatment. Treatment options that do not minimize recovery or allow the patient to return to protected play, such as external fixation, are generally avoided during the season of play. Undertreated joint injuries and unrecognized ligament injuries can result in long term disability. PMID:25455398

Prucz, Roni B; Friedrich, Jeffrey B

2015-01-01

168

Prosthetic elbow joint  

NASA Technical Reports Server (NTRS)

An artificial, manually positionable elbow joint for use in an upper extremity, above-elbow, prosthetic is described. The prosthesis provides a locking feature that is easily controlled by the wearer. The instant elbow joint is very strong and durable enough to withstand the repeated heavy loadings encountered by a wearer who works in an industrial, construction, farming, or similar environment. The elbow joint of the present invention comprises a turntable, a frame, a forearm, and a locking assembly. The frame generally includes a housing for the locking assembly and two protruding ears. The forearm includes an elongated beam having a cup-shaped cylindrical member at one end and a locking wheel having a plurality of holes along a circular arc on its other end with a central bore for pivotal attachment to the protruding ears of the frame. The locking assembly includes a collar having a central opening with a plurality of internal grooves, a plurality of internal cam members each having a chamfered surface at one end and a V-shaped slot at its other end; an elongated locking pin having a crown wheel with cam surfaces and locking lugs secured thereto; two coiled compression springs; and a flexible filament attached to one end of the elongated locking pin and extending from the locking assembly for extending and retracting the locking pin into the holes in the locking wheel to permit selective adjustment of the forearm relative to the frame. In use, the turntable is affixed to the upper arm part of the prosthetic in the conventional manner, and the cup-shaped cylindrical member on one end of the forearm is affixed to the forearm piece of the prosthetic in the conventional manner. The elbow joint is easily adjusted and locked between maximum flex and extended positions.

Weddendorf, Bruce C. (inventor)

1994-01-01

169

Laboratory characterization of rock joints  

SciTech Connect

A laboratory characterization of the Apache Leap tuff joints under cyclic pseudostatic and dynamic loads has been undertaken to obtain a better understanding of dynamic joint shear behavior and to generate a complete data set that can be used for validation of existing rock-joint models. Study has indicated that available methods for determining joint roughness coefficient (JRC) significantly underestimate the roughness coefficient of the Apache Leap tuff joints, that will lead to an underestimation of the joint shear strength. The results of the direct shear tests have indicated that both under cyclic pseudostatic and dynamic loadings the joint resistance upon reverse shearing is smaller than that of forward shearing and the joint dilation resulting from forward shearing recovers during reverse shearing. Within the range of variation of shearing velocity used in these tests, the shearing velocity effect on rock-joint behavior seems to be minor, and no noticeable effect on the peak joint shear strength and the joint shear strength for the reverse shearing is observed.

Hsiung, S.M.; Kana, D.D.; Ahola, M.P.; Chowdhury, A.H.; Ghosh, A. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

1994-05-01

170

Joint measurements and Bell inequalities  

E-print Network

Joint quantum measurements of non-commuting observables are possible, if one accepts an increase in the measured variances. A necessary condition for a joint measurement to be possible is that a joint probability distribution exists for the measurement. This fact suggests that there may be a link with Bell inequalities, as these will be satisfied if and only if a joint probability distribution for all involved observables exists. We investigate the connections between Bell inequalities and conditions for joint quantum measurements to be possible. Mermin's inequality for the three-particle Greenberger-Horne-Zeilinger state turns out to be equivalent to the condition for a joint measurement on two out of the three quantum systems to exist. Gisin's Bell inequality for three co-planar measurement directions, meanwhile, is shown to be less strict than the condition for the corresponding joint measurement.

Wonmin Son; Erika Andersson; Stephem M. Barnett; M. S. Kim

2005-09-20

171

Magnetic resonance imaging of the temporomandibular joint in children with juvenile idiopathic arthritis.  

PubMed

For more than a century, it has been known that juvenile idiopathic arthritis (JIA) can affect the temporomandibular joint. With advances in medical imaging in more recent decades, there has been an increase in awareness of the spectrum of pathology that can affect the temporomandibular joint in children with JIA. This pathology can lead to symptoms ranging from decreased chewing ability, jaw and facial pain, headaches and malocclusion to craniofacial morphological changes such as a retrognathic mandible. The purpose of this review is to suggest an MR imaging protocol for the temporomandibular joint and to illustrate normal and abnormal appearances of the joint in children with JIA. PMID:24257698

Meyers, Arthur B; Laor, Tal

2013-12-01

172

A Revolute Joint With Linear Load-Displacement Response for Precision Deployable Structures  

NASA Technical Reports Server (NTRS)

NASA Langley Research center is developing key structures and mechanisms technologies for micron-accuracy, in-space deployment of future space instruments. Achieving micron-accuracy deployment requires significant advancements in deployment mechanism design such as the revolute joint presented herein. The joint presented herein exhibits a load-cycling response that is essentially linear with less than two percent hysteresis, and the joint rotates with less than one in.-oz. of resistance. A prototype reflector metering truss incorporating the joint exhibits only a few microns of kinematic error under repeated deployment and impulse loading. No other mechanically deployable structure found in literature has been demonstrated to be this kinematically accurate.

Lake, Mark S.; Warren, Peter A.; Peterson, Lee D.

1996-01-01

173

Disorders of the First Metatarsophalangeal Joint.  

PubMed

The two most common disorders of the first metatarsophalangeal (MTP) joint are hallux valgus and hallux rigidus. The hallux valgus deformity has been the subject of numerous clinical studies in the past decade. This information has enabled the creation of an algorithm to assist the clinician in evaluating the patient with hallux valgus and selecting the appropriate surgical procedure. The technical aspects of various operative procedures and the most common complications are reviewed. The other major disorder of the first MTP joint is arthrosis, which results in hallux rigidus. As the arthrosis progresses, there is often proliferation of bone on the dorsal aspect of the metatarsal head, which results in impingement of the proximal phalanx during dorsiflexion. The impingement causes jamming, instead of gliding, of the proximal phalanx on the metatarsal head, which results in pain. The treatment for this condition consists of debridement of the MTP joint to relieve the dorsal impingement and, in most cases, the pain. If the arthrosis is advanced in an active individual, arthrodesis is indicated. PMID:10790651

Mann

1995-01-01

174

Results and Analysis from Space Suit Joint Torque Testing  

NASA Technical Reports Server (NTRS)

A space suit's mobility is critical to an astronaut's ability to perform work efficiently. As mobility increases, the astronaut can perform tasks for longer durations with less fatigue. Mobility can be broken down into two parts: range of motion (ROM) and torque. These two measurements describe how the suit moves and how much force it takes to move. Two methods were chosen to define mobility requirements for the Constellation Space Suit Element (CSSE). One method focuses on range of motion and the second method centers on joint torque. A joint torque test was conducted to determine a baseline for current advanced space suit joint torques. This test utilized the following space suits: Extravehicular Mobility Unit (EMU), Advanced Crew Escape Suit (ACES), I-Suit, D-Suit, Enhanced Mobility (EM)- ACES, and Mark III (MK-III). Data was collected data from 16 different joint movements of each suit. The results were then reviewed and CSSE joint torque requirement values were selected. The focus of this paper is to discuss trends observed during data analysis.

Matty, Jennifer

2010-01-01

175

Advanced Robotics Mechatronics System: emerging technologies for interplanetary robotics  

Microsoft Academic Search

The paper describes some of the results from the Advanced Robotics Mechatronics System Project. The objective of the overall project was to examine new technologies for the next generation of space robotics which would deliver reduced system mass and high torque density joints. The development and test of this novel manipulator joint and control architecture was based on the use

George V. Bailak; Bruno Rubinger; Moksoon Jang; Francis Dawson

2004-01-01

176

Advances in Polynomial Continuation for Solving Problems in Kinematics  

E-print Network

Advances in Polynomial Continuation for Solving Problems in Kinematics Andrew J. Sommese # Jan and planar joints are all allowed. Moreover, many higher­order contact joints are also described seems to have been first applied to kinematics in [13, 14], as a heuristic, and later by [21

Sommese, Andrew J.

177

DOE-EERC jointly sponsored research program  

SciTech Connect

U.S. Department of Energy (DOE) Cooperative Agreement DE-FC21-93MC30098 funded through the Office of Fossil Energy and administered at the Federal Energy Technology Center (FETC) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy and Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying efficient, nonpolluting energy technologies that can compete effectively in meeting market demands for clean fuels, chemical feedstocks, and electricity in the 21st century. The objective of the JSRP was to advance the deployment of advanced technologies for improving energy efficiency and environmental performance through jointly sponsored research on topics that would not be adequately addressed by the private sector alone. Examples of such topics include the barriers to hot-gas cleaning impeding the deployment of high-efficiency power systems and the search for practical means for sequestering CO{sub 2} generated by fossil fuel combustion. The selection of particular research projects was guided by a combination of DOE priorities and market needs, as provided by the requirement for joint venture funding approved both by DOE and the private sector sponsor. The research addressed many different energy resource and related environmental problems, with emphasis directed toward the EERC's historic lead mission in low-rank coals (LRCs), which represent approximately half of the U.S. coal resources in the conterminous states, much larger potential resources in Alaska, and a major part of the energy base in the former U.S.S.R., East Central Europe, and the Pacific Rim. The Base and JSRP agreements were tailored to the growing awareness of critical environmental issues, including water supply and quality, air toxics (e.g., mercury), fine respirable particulate matter (PM{sub 2.5}), and the goal of zero net CO{sub 2} emissions.

Hendrikson, J.G.; Sondreal, E.A.

1999-09-01

178

Posttraumatic Temporomandibular Joint Disorders  

PubMed Central

The temporomandibular joint (TMJ) has many essential functions. None of its components are exempt from injury. Facial asymmetry, malocclusion, disturbances in growth, osteoarthritis, and ankylosis can manifest as complications from trauma to the TMJ. The goals of initial treatment include achievement of pretraumatic function, restoration of facial symmetry, and resolution of pain. These same objectives hold true for late repairs and reconstruction of the TMJ apparatus. Treatment is demanding, and with opposing approaches. The following article explores various treatment options for problems presenting as a result of a history of trauma to the TMJ. PMID:22110802

Giannakopoulos, Helen E.; Quinn, Peter D.; Granquist, Eric; Chou, Joli C.

2009-01-01

179

Osteoarthritis: The Peripheral Joints  

PubMed Central

Understanding of osteoarthritis has increased: the simplistic “wear and tear” concept no longer holds and this has positive clinical implications. A parallel development has taken place in treatment techniques: there is increasing expertise in the use of physical measures and in new orthopedic reconstructive surgical approaches to multiple joints. This gives the physician alternative approaches to the patient with painful and disabling osteoarthritis. The timing of these treatment options and some considerations which lead to orthopedic referral are considered in this general discussion. Imagesp285-aFig. 1Fig. 2Fig. 3 PMID:20469342

Robinson, Harold S.

1981-01-01

180

Metal to ceramic sealed joint  

DOEpatents

A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system. 11 figures.

Lasecki, J.V.; Novak, R.F.; McBride, J.R.

1991-08-27

181

Metal to ceramic sealed joint  

DOEpatents

A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system.

Lasecki, John V. (Livonia, MI); Novak, Robert F. (Farmington Hills, MI); McBride, James R. (Ypsilanti, MI)

1991-01-01

182

Strength of Welded Aircraft Joints  

NASA Technical Reports Server (NTRS)

This investigation is a continuation of work started in 1928 and described in NACA-TR-348 which shows that the insertion of gusset plates was the most satisfactory way of strengthening a joint. Additional tests of the present series show that joints of this type could be improved by cutting out the portion of the plate between the intersecting tubes. T and lattice joints in thin-walled tubing 1 1/2 by 0.020 inch have somewhat lower strengths than joints in tubing of greater wall thickness because of failure by local buckling. In welding the thin-walled tubing, the recently developed "carburizing flux" process was found to be the only method capable of producing joints free from cracks. The "magnetic powder" inspection was used to detect cracks in the joints and flaws in the tubing.

Brueggeman, W C

1937-01-01

183

Early Developments in Joint Action  

PubMed Central

Joint action, critical to human social interaction and communication, has garnered increasing scholarly attention in many areas of inquiry, yet its development remains little explored. This paper reviews research on the growth of joint action over the first 2 years of life to show how children become progressively more able to engage deliberately, autonomously, and flexibly in joint action with adults and peers. It is suggested that a key mechanism underlying the dramatic changes in joint action over the second year of life is the ability to reflect consciously on oneself and one’s behavior and volition and correspondingly, on the behavior, goals, and intentions of others. PMID:23087769

Brownell, Celia A.

2012-01-01

184

Joint collaborative technology experiment  

NASA Astrophysics Data System (ADS)

Use of unmanned systems is rapidly growing within the military and civilian sectors in a variety of roles including reconnaissance, surveillance, explosive ordinance disposal (EOD), and force-protection and perimeter security. As utilization of these systems grows at an ever increasing rate, the need for unmanned systems teaming and inter-system collaboration becomes apparent. Collaboration provides a means of enhancing individual system capabilities through relevant data exchange that contributes to cooperative behaviors between systems and enables new capabilities not possible if the systems operate independently. A collaborative networked approach to development holds the promise of adding mission capability while simultaneously reducing the workload of system operators. The Joint Collaborative Technology Experiment (JCTE) joins individual technology development efforts within the Air Force, Navy, and Army to demonstrate the potential benefits of interoperable multiple system collaboration in a force-protection application. JCTE participants are the Air Force Research Laboratory, Materials and Manufacturing Directorate, Airbase Technologies Division, Force Protection Branch (AFRL/RXQF); the Army Aviation and Missile Research, Development, and Engineering Center Software Engineering Directorate (AMRDEC SED); and the Space and Naval Warfare Systems Center - Pacific (SSC Pacific) Unmanned Systems Branch operating with funding provided by the Joint Ground Robotics Enterprise (JGRE). This paper will describe the efforts to date in system development by the three partner organizations, development of collaborative behaviors and experimentation in the force-protection application, results and lessons learned at a technical demonstration, simulation results, and a path forward for future work.

Wills, Michael; Ciccimaro, Donny; Yee, See; Denewiler, Thomas; Stroumtsos, Nicholas; Messamore, John; Brown, Rodney; Skibba, Brian; Clapp, Daniel; Wit, Jeff; Shirts, Randy J.; Dion, Gary N.; Anselmo, Gary S.

2009-05-01

185

Glenohumeral Joint Injections  

PubMed Central

Context: Intra-articular injections into the glenohumeral joint are commonly performed by musculoskeletal providers, including orthopaedic surgeons, family medicine physicians, rheumatologists, and physician assistants. Despite their frequent use, there is little guidance for injectable treatments to the glenohumeral joint for conditions such as osteoarthritis, adhesive capsulitis, and rheumatoid arthritis. Evidence Acquisition: We performed a comprehensive review of the available literature on glenohumeral injections to help clarify the current evidence-based practice and identify deficits in our understanding. We searched MEDLINE (1948 to December 2011 [week 1]) and EMBASE (1980 to 2011 [week 49]) using various permutations of intra-articular injections AND (corticosteroid OR hyaluronic acid) and (adhesive capsulitis OR arthritis). Results: We identified 1 and 7 studies that investigated intra-articular corticosteroid injections for the treatment of osteoarthritis and adhesive capsulitis, respectively. Two and 3 studies investigated the use of hyaluronic acid in osteoarthritis and adhesive capsulitis, respectively. One study compared corticosteroids and hyaluronic acid injections in the treatment of osteoarthritis, and another discussed adhesive capsulitis. Conclusion: Based on existing studies and their level of evidence, there is only expert opinion to guide corticosteroid injection for osteoarthritis as well as hyaluronic acid injection for osteoarthritis and adhesive capsulitis. PMID:24427384

Gross, Christopher; Dhawan, Aman; Harwood, Daniel; Gochanour, Eric; Romeo, Anthony

2013-01-01

186

Advancing as an Advancement Officer.  

ERIC Educational Resources Information Center

Provides the views of four advancement officers on why undertaking advancement-related graduate study is valuable. Presents a list with contact information of almost 100 graduate and certificate programs in the United States, Canada, Australia, and the United Kingdom related to institutional advancement. (EV)

Meyer, Harvey

2002-01-01

187

Joint Information CenterJoint Information Center Deepwater Horizon Response  

E-print Network

and it is determined to be within the Deepwater Horizon Oil Spill Re- sponse area, a wildlife response team is notified when they see the birds that have been impacted by the Deepwa- ter Horizon/BP oil spill. WhileJoint Information CenterJoint Information Center Deepwater Horizon Response Incident Command Post

188

Joint shape morphogenesis precedes cavitation of the developing hip joint.  

PubMed

The biology and mechanobiology of joint cavitation have undergone extensive investigation, but we have almost no understanding of the development of joint shape. Joint morphogenesis, the development of shape, has been identified as the 'least understood aspect of joint formation' (2005, Birth Defects Res C Embryo Today 75, 237), despite the clinical relevance of shape morphogenesis to postnatal skeletal malformations such as developmental dysplasia of the hip. In this study, we characterise development of early hip joint shape in the embryonic chick using direct capture 3D imaging. Contrary to formerly held assumptions that cavitation precedes morphogenesis in joint development, we have found that the major anatomical features of the adult hip are present at Hamburger Hamilton (HH)32, a full day prior to cavitation of the joint at HH34. We also reveal that the pelvis undergoes significant changes in orientation with respect to the femur, despite the lack of a joint cavity between the rudiments. Furthermore, we have identified the appearance of the ischium and pubis several developmental stages earlier than was previously reported, illustrating the value and importance of direct capture 3D imaging. PMID:24266523

Nowlan, Niamh C; Sharpe, James

2014-04-01

189

Joint Contracture Orthosis (JCO)  

NASA Technical Reports Server (NTRS)

The purpose of this project was to develop an advanced orthosis which is effective in reducing upper and lower limb contractures in significantly less time than currently required with conventional methods. The team that developed the JCO consisted of an engineer, orthotist, therapist, and physician.

Lunsford, Thomas R.; Parsons, Ken; Krouskop, Thomas; McGee, Kevin

1997-01-01

190

Biochemical markers of ongoing joint damage in rheumatoid arthritis - current and future applications, limitations and opportunities  

PubMed Central

Rheumatoid arthritis (RA) is a chronic systemic autoimmune disease associated with potentially debilitating joint inflammation, as well as altered skeletal bone metabolism and co-morbid conditions. Early diagnosis and aggressive treatment to control disease activity offers the highest likelihood of preserving function and preventing disability. Joint inflammation is characterized by synovitis, osteitis, and/or peri-articular osteopenia, often accompanied by development of subchondral bone erosions, as well as progressive joint space narrowing. Biochemical markers of joint cartilage and bone degradation may enable timely detection and assessment of ongoing joint damage, and their use in facilitating treatment strategies is under investigation. Early detection of joint damage may be assisted by the characterization of biochemical markers that identify patients whose joint damage is progressing rapidly and who are thus most in need of aggressive treatment, and that, alone or in combination, identify those individuals who are likely to respond best to a potential treatment, both in terms of limiting joint damage and relieving symptoms. The aims of this review are to describe currently available biochemical markers of joint metabolism in relation to the pathobiology of joint damage and systemic bone loss in RA; to assess the limitations of, and need for additional, novel biochemical markers in RA and other rheumatic diseases, and the strategies used for assay development; and to examine the feasibility of advancement of personalized health care using biochemical markers to select therapeutic agents to which a patient is most likely to respond. PMID:21539724

2011-01-01

191

Relationship between joint effusion, joint pain, and protein levels in joint lavage fluid of patients with internal derangement and osteoarthritis of the temporomandibular joint  

Microsoft Academic Search

Purpose: The purpose of this study was to investigate the relationship between the presence of joint effusion, joint pain, and protein levels in joint lavage fluid (JL) of patients with internal derangement (ID) and osteoarthritis (OA) of the temporomandibular joint (TMJ).Patients and Methods: Thirty-eight joints in 26 patients with ID and OA of the TMJ were studied. Magnetic resonance imaging

Tetsu Takahashi; Hirokazu Nagai; Hiroshi Seki; Masayuki Fukuda

1999-01-01

192

International Joint Commission  

NSDL National Science Digital Library

The International Joint Commission was created by Canada and the United States "because they recognized that each country is affected by the other's actions in lake and river systems along the border. The two countries cooperate to manage these waters wisely and to protect them for the benefit of today's citizens and future generations." Visitors to the site can read about great lakes water quality issues, great lakes exports, water levels, news releases, publications, view maps, and much more. One of the latest publications available on the site includes the proceeding from a workshop entitled Addressing Atmospheric Mercury: Science and Policy. This extensive site is well organized and written, giving anyone living near or interested in the great lakes a good source for timely and important information.

2008-08-27

193

International Joint Commission  

NSDL National Science Digital Library

The International Joint Commission was created by Canada and the United States "because they recognized that each country is affected by the other's actions in lake and river systems along the border. The two countries cooperate to manage these waters wisely and to protect them for the benefit of today's citizens and future generations." Visitors to the site can read about great lakes water quality issues, great lakes exports, water levels, news releases, publications, view maps, and much more. One of the latest publications available on the site includes the proceeding from a workshop entitled Addressing Atmospheric Mercury: Science and Policy. This extensive site is well organized and written, giving anyone living near or interested in the great lakes a good source for timely and important information.

194

Passive Ball Capture Joint  

NASA Technical Reports Server (NTRS)

A passive ball capture joint has a sleeve with a plurality of bores distributed about a circumference thereof and formed therethrough at an acute angle relative to the sleeve's longitudinal axis. A spring-loaded retainer is slidingly fitted in each bore and is biased such that, if allowed, will extend at least partially into the sleeve to retain a ball therein. A ring, rotatably mounted about the bores, has an interior wall defining a plurality of shaped races that bear against the spring-loaded retainers. A mechanized rotational force producer is coupled to the ring. The ring can be rotated from a first position (that presses the retainers into the sleeve to lock the ball in place) to a second position (that allows the retainers to springback out of the sleeve to release the ball).

Cloyd, Richard A. (Inventor); Bryan, Thomas C. (Inventor)

2003-01-01

195

Corynebacterium Prosthetic Joint Infection  

PubMed Central

Identification of Corynebacterium species may be challenging. Corynebacterium species are occasional causes of prosthetic joint infection (PJI), but few data are available on the subject. Based on the literature, C. amycolatum, C. aurimucosum, C. jeikeium, and C. striatum are the most common Corynebacterium species that cause PJI. We designed a rapid PCR assay to detect the most common human Corynebacterium species, with a specific focus on PJI. A polyphosphate kinase gene identified using whole-genome sequence was targeted. The assay differentiates the antibiotic-resistant species C. jeikeium and C. urealyticum from other species in a single assay. The assay was applied to a collection of human Corynebacterium isolates from multiple clinical sources, and clinically relevant species were detected. The assay was then tested on Corynebacterium isolates specifically associated with PJI; all were detected. We also describe the first case of C. simulans PJI. PMID:22337986

Cazanave, Charles; Greenwood-Quaintance, Kerryl E.; Hanssen, Arlen D.

2012-01-01

196

Exercise and the Knee Joint.  

ERIC Educational Resources Information Center

This report by the President's Council on Physical Fitness and Sports examines the effects of various forms of physical exercise on the knee joint which, because of its vulnerability, is especially subject to injury. Discussion centers around the physical characteristics of the joint, commonly used measurements for determining knee stability,…

Clarke, H. Harrison, Ed.

1976-01-01

197

The second skin approach : skin strain field analysis and mechanical counter pressure prototyping for advanced spacesuit design  

E-print Network

The primary aim of this thesis is to advance the theory of advanced locomotion mechanical counter pressure (MCP) spacesuits by studying the changes in the human body shape during joint motion. Two experiments take advantage ...

Bethke, Kristen (Kristen Ann)

2005-01-01

198

Space Station alpha joint bearing  

NASA Technical Reports Server (NTRS)

Perhaps the most critical structural system aboard the Space Station is the Solar Alpha Rotary Joint which helps align the power generation system with the sun. The joint must provide structural support and controlled rotation to the outboard transverse booms as well as power and data transfer across the joint. The Solar Alpha Rotary Joint is composed of two transition sections and an integral, large diameter bearing. Alpha joint bearing design presents a particularly interesting problem because of its large size and need for high reliability, stiffness, and on orbit maintability. The discrete roller bearing developed is a novel refinement to cam follower technology. It offers thermal compensation and ease of on-orbit maintenance that are not found in conventional rolling element bearings. How the bearing design evolved is summarized. Driving requirements are reviewed, alternative concepts assessed, and the selected design is described.

Everman, Michael R.; Jones, P. Alan; Spencer, Porter A.

1987-01-01

199

Shock transmissibility of threaded joints  

SciTech Connect

Sandia National Laboratories (SNL) designs mechanical systems with threaded joints that must survive high shock environments. These mechanical systems include penetrators that must survive soil and rock penetration; drilling pipe strings that must survive rock-cutting, shock environments; and laydown weapons that must survive delivery impact shock. This paper summarizes an analytical study and an experimental evaluation of compressive, one-dimensional, shock transmission through a threaded joint in a split Hopkinson bar configuration. Thread geometries were scaled to simulate large diameter threaded joints with loadings parallel to the axis of the threads. Both strain and acceleration were evaluated with experimental measurements and analysis. Analytical results confirm the experimental conclusions that in this split Hopkinson bar configuration, the change in the one-dimensional shock wave by the threaded joint is localized to a length equal to a few diameters` length beyond the threaded joint.

Hansen, N.R.; Bateman, V.I.; Brown, F.A.

1996-12-31

200

THEORETICAL ADVANCES Joint feature selection and classification for taxonomic problems  

E-print Network

to a taxonomic problem involving species of suckers in the genus Carpiodes. The results confirm the necessity have traditionally been misdiagnosed as C. carpio but are in fact more close to C. cyprinus. We also Carpiodes. The results look promising: the proposed method not only learned the classifier that well

Bart Jr., Henry L. "Hank"

201

11 CFR 9034.8 - Joint fundraising.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Joint fundraising. 9034.8 Section 9034...MATCHING FUND ENTITLEMENTS § 9034.8 Joint fundraising. (a) General...funds under this subchapter may engage in joint fundraising with other candidates,...

2012-01-01

202

11 CFR 9034.8 - Joint fundraising.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2012-01-01 true Joint fundraising. 9034.8 Section 9034...MATCHING FUND ENTITLEMENTS § 9034.8 Joint fundraising. (a) General...funds under this subchapter may engage in joint fundraising with other candidates,...

2013-01-01

203

29 CFR 791.2 - Joint employment.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Joint employment. 791.2 Section 791...INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS JOINT EMPLOYMENT RELATIONSHIP UNDER FAIR LABOR STANDARDS ACT OF 1938 § 791.2 Joint employment. (a) A single...

2010-07-01

204

29 CFR 791.2 - Joint employment.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Joint employment. 791.2 Section 791...INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS JOINT EMPLOYMENT RELATIONSHIP UNDER FAIR LABOR STANDARDS ACT OF 1938 § 791.2 Joint employment. (a) A single...

2013-07-01

205

24 CFR 570.308 - Joint requests.  

...Development 3 2014-04-01 2013-04-01 true Joint requests. 570.308 Section 570.308 Housing...BLOCK GRANTS Entitlement Grants § 570.308 Joint requests. (a) Joint requests and cooperation agreements....

2014-04-01

206

11 CFR 9034.8 - Joint fundraising.  

...2014-01-01 2014-01-01 false Joint fundraising. 9034.8 Section 9034...MATCHING FUND ENTITLEMENTS § 9034.8 Joint fundraising. (a) General...funds under this subchapter may engage in joint fundraising with other candidates,...

2014-01-01

207

29 CFR 791.2 - Joint employment.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Joint employment. 791.2 Section 791...INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS JOINT EMPLOYMENT RELATIONSHIP UNDER FAIR LABOR STANDARDS ACT OF 1938 § 791.2 Joint employment. (a) A single...

2012-07-01

208

24 CFR 570.308 - Joint requests.  

Code of Federal Regulations, 2013 CFR

...Development 3 2013-04-01 2013-04-01 false Joint requests. 570.308 Section 570.308 Housing...BLOCK GRANTS Entitlement Grants § 570.308 Joint requests. (a) Joint requests and cooperation agreements....

2013-04-01

209

11 CFR 9034.8 - Joint fundraising.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Joint fundraising. 9034.8 Section 9034...MATCHING FUND ENTITLEMENTS § 9034.8 Joint fundraising. (a) General...funds under this subchapter may engage in joint fundraising with other candidates,...

2011-01-01

210

29 CFR 791.2 - Joint employment.  

...2014-07-01 2014-07-01 false Joint employment. 791.2 Section 791...INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS JOINT EMPLOYMENT RELATIONSHIP UNDER FAIR LABOR STANDARDS ACT OF 1938 § 791.2 Joint employment. (a) A single...

2014-07-01

211

24 CFR 570.308 - Joint requests.  

Code of Federal Regulations, 2012 CFR

...Development 3 2012-04-01 2012-04-01 false Joint requests. 570.308 Section 570.308 Housing...BLOCK GRANTS Entitlement Grants § 570.308 Joint requests. (a) Joint requests and cooperation agreements....

2012-04-01

212

11 CFR 9034.8 - Joint fundraising.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Joint fundraising. 9034.8 Section 9034...MATCHING FUND ENTITLEMENTS § 9034.8 Joint fundraising. (a) General...funds under this subchapter may engage in joint fundraising with other candidates,...

2010-01-01

213

24 CFR 570.308 - Joint requests.  

Code of Federal Regulations, 2010 CFR

...Development 3 2010-04-01 2010-04-01 false Joint requests. 570.308 Section 570.308 Housing...BLOCK GRANTS Entitlement Grants § 570.308 Joint requests. (a) Joint requests and cooperation agreements....

2010-04-01

214

24 CFR 570.308 - Joint requests.  

Code of Federal Regulations, 2011 CFR

...Development 3 2011-04-01 2010-04-01 true Joint requests. 570.308 Section 570.308 Housing...BLOCK GRANTS Entitlement Grants § 570.308 Joint requests. (a) Joint requests and cooperation agreements....

2011-04-01

215

29 CFR 791.2 - Joint employment.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Joint employment. 791.2 Section 791...INTERPRETATION NOT DIRECTLY RELATED TO REGULATIONS JOINT EMPLOYMENT RELATIONSHIP UNDER FAIR LABOR STANDARDS ACT OF 1938 § 791.2 Joint employment. (a) A single...

2011-07-01

216

22 CFR 228.34 - Joint ventures.  

Code of Federal Regulations, 2011 CFR

... 2011-04-01 2011-04-01 false Joint ventures. 228.34 Section 228.34 Foreign Relations...Services for USAID Financing § 228.34 Joint ventures. A joint venture or unincorporated association is eligible only...

2011-04-01

217

22 CFR 228.34 - Joint ventures.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 2010-04-01 false Joint ventures. 228.34 Section 228.34 Foreign Relations...Services for USAID Financing § 228.34 Joint ventures. A joint venture or unincorporated association is eligible only...

2010-04-01

218

Rene 95 brazed joint metallurgical program  

NASA Technical Reports Server (NTRS)

This metallurgical program was specifically conducted for the establishment of material properties required for the design of the LF460 fan. The LF460 lift fan is an advanced 18:1 high thrust to weight single stage design. It has a turbine attached to the outer flowpath of the fan blade tip which minimizes the axial depth of the fan. Advanced lightweight attachment designs are employed in this concept to achieve minimum mass polar moments of inertia which are required for good aircraft flight response control. The design features which are unique to this advanced LF460 lift fan are the 0.010 inch thin Udimet 700 alloy integral tip turbine design, minimum weight braze attachment of the turbine to the fan blade, and the high strength and elevated temperature capability of the Rene'95 alloy for the fan blade. The data presented in this report show that the LF460 fan rotor design is feasible and that the design stresses and margins of safety were more than adequate. Prior to any production application, however, additional stress rupture/shear lap joints should be run in order to establish a firm 1200 F stress rupture curve for the CM50 braze metal.

Gay, C.; Givens, J.; Mastrorroco, S.; Sterman, A.

1972-01-01

219

Low frequency electromagnetic coupling through joints  

NASA Astrophysics Data System (ADS)

Low frequency (quasi-static) penetration through joints is investigated numerically for a uniform joint and for local electrical contact joints. Overlapped joints improve greatly the shielding effectiveness of loaded aperture in comparison to an aperture bonded by non-overlapped junctions. The uniform joint results lead to the same results as Casey's formalism while the local electrical contact joints results show that shielding effectiveness reached constant value.

Sternberg, Marc; Gobin, Vincent; Issac, Francois

220

Experimental investigation of the scaling of columnar joints.  

PubMed

Columnar jointing is a fracture pattern common in igneous rocks in which cracks self-organize into a roughly hexagonal arrangement, leaving behind an ordered colonnade. We report observations of columnar jointing in a laboratory analog system, desiccated corn starch slurries. Using measurements of moisture density, evaporation rates, and fracture advance rates as evidence, we suggest that an advective-diffusive system is responsible for the rough scaling behavior of columnar joints. This theory explains the order of magnitude difference in scales between jointing in lavas and in starches. We investigated the scaling of average columnar cross-sectional areas due to the evaporation rate, the analog of the cooling rate of igneous columnar joints. We measured column areas in experiments where the evaporation rate depended on lamp height and time, in experiments where the evaporation rate was fixed using feedback methods, and in experiments where gelatin was added to vary the rheology of the starch. Our results suggest that the column area at a particular depth is related to both the current conditions, and hysteretically to the geometry of the pattern at previous depths. We argue that there exists a range of stable column scales allowed for any particular evaporation rate. PMID:17025716

Goehring, Lucas; Morris, Stephen W; Lin, Zhenquan

2006-09-01

221

Experimental investigation of the scaling of columnar joints  

NASA Astrophysics Data System (ADS)

Columnar jointing is a fracture pattern common in igneous rocks in which cracks self-organize into a roughly hexagonal arrangement, leaving behind an ordered colonnade. We report observations of columnar jointing in a laboratory analog system, desiccated corn starch slurries. Using measurements of moisture density, evaporation rates, and fracture advance rates as evidence, we suggest that an advective-diffusive system is responsible for the rough scaling behavior of columnar joints. This theory explains the order of magnitude difference in scales between jointing in lavas and in starches. We investigated the scaling of average columnar cross-sectional areas due to the evaporation rate, the analog of the cooling rate of igneous columnar joints. We measured column areas in experiments where the evaporation rate depended on lamp height and time, in experiments where the evaporation rate was fixed using feedback methods, and in experiments where gelatin was added to vary the rheology of the starch. Our results suggest that the column area at a particular depth is related to both the current conditions, and hysteretically to the geometry of the pattern at previous depths. We argue that there exists a range of stable column scales allowed for any particular evaporation rate.

Goehring, Lucas; Morris, Stephen W.; Lin, Zhenquan

2006-09-01

222

An Experimental Investigation of the Scaling of Columnar Joints  

E-print Network

Columnar jointing is a fracture pattern common in igneous rocks in which cracks self-organize into a roughly hexagonal arrangement, leaving behind an ordered colonnade. We report observations of columnar jointing in a laboratory analog system, desiccated corn starch slurries. Using measurements of moisture density, evaporation rates, and fracture advance rates as evidence, we suggest an advective-diffusive system is responsible for the rough scaling behavior of columnar joints. This theory explains the order of magnitude difference in scales between jointing in lavas and in starches. We investigated the scaling of average columnar cross-sectional areas due to the evaporation rate, the analog of the cooling rate of igneous columnar joints. We measured column areas in experiments where the evaporation rate depended on lamp height and time, in experiments where the evaporation rate was fixed using feedback methods, and in experiments where gelatin was added to vary the rheology of the starch. Our results suggest that the column area at a particular depth is related to both the current conditions, and hysteretically to the geometry of the pattern at previous depths. We argue that there exists a range of stable column scales allowed for any particular evaporation rate.

Lucas Goehring; Zhenquan Lin; Stephen W. Morris

2006-08-03

223

Common Bolted Joint Analysis Tool  

NASA Technical Reports Server (NTRS)

Common Bolted Joint Analysis Tool (comBAT) is an Excel/VB-based bolted joint analysis/optimization program that lays out a systematic foundation for an inexperienced or seasoned analyst to determine fastener size, material, and assembly torque for a given design. Analysts are able to perform numerous what-if scenarios within minutes to arrive at an optimal solution. The program evaluates input design parameters, performs joint assembly checks, and steps through numerous calculations to arrive at several key margins of safety for each member in a joint. It also checks for joint gapping, provides fatigue calculations, and generates joint diagrams for a visual reference. Optimum fastener size and material, as well as correct torque, can then be provided. Analysis methodology, equations, and guidelines are provided throughout the solution sequence so that this program does not become a "black box:" for the analyst. There are built-in databases that reduce the legwork required by the analyst. Each step is clearly identified and results are provided in number format, as well as color-coded spelled-out words to draw user attention. The three key features of the software are robust technical content, innovative and user friendly I/O, and a large database. The program addresses every aspect of bolted joint analysis and proves to be an instructional tool at the same time. It saves analysis time, has intelligent messaging features, and catches operator errors in real time.

Imtiaz, Kauser

2011-01-01

224

Joint numerical ranges, quantum maps, and joint numerical shadows  

E-print Network

We associate with k hermitian N\\times N matrices a probability measure on R^k. It is supported on the joint numerical range of the k-tuple of matrices. We call this measure the joint numerical shadow of these matrices. Let k=2. A pair of hermitian N\\times N matrices defines a complex N\\times N matrix. The joint numerical range and the joint numerical shadow of the pair of hermitian matrices coincide with the numerical range and the numerical shadow, respectively, of this complex matrix. We study relationships between the dynamics of quantum maps on the set of quantum states, on one hand, and the numerical ranges, on the other hand. In particular, we show that under the identity resolution assumption on Kraus operators defining the quantum map, the dynamics shrinks numerical ranges.

Eugene Gutkin; Karol Zyczkowski

2012-07-05

225

Joint Center for Political and Economic Studies  

NSDL National Science Digital Library

Founded in 1970, the Joint Center for Political and Economic Studies is a national, nonprofit research and public policy institution that performs research and outreach activities on public policy issues that are of concern to African Americans and other communities of color. The areas that are of prime interest to the Center include economic advancement, political participation, and international affairs. The homepage for the site offers some highlights of recent releases from the Center (such as audiocasts and new reports) and information on job openings and internships at the Center. The navigation bar on the left-hand side of the homepage is useful as well, as users will be directed to helpful publications and the organization's very useful databank. The databank also features thematic fact sheets on topics ranging from children living in poverty to the "digital divide".

226

Artificial hip joints: The biomaterials challenge.  

PubMed

What is new and what comes next in artificial hip joints? These are the crucial questions we attempt to answer after accurately surveying the state of the art in the field of hip arthroplasty, especially related to non-metallic materials. Summarizing the present situation, one could safely state that the current generation of hard-on-soft and hard-on-hard hip bearings has become quite effective in exhibiting extremely low degrees of wear when compared to traditional implants made of cobalt-chromium alloys coupled with conventional polyethylene materials or to the primitive alumina materials used in the past. Moreover, at a stage of more than 10 years in the clinical follow-up of new generations of hard-on-hard bearings, and more than 10 years follow-up for highly cross-linked polyethylene materials, we should soon be expecting a new set of officially compiled statistics that show significant reductions in failures due to particle-mediated osteolysis as compared to past statistical compilations. However, further important issues (other than wear) remain unsolved, including structural reliability of advanced ceramic and polyethylene components. Severe challenges yet stand in optimizing the biomaterials choice for significantly extended lifetimes and reduced failure risks. Moreover, joint healing trends are expected to evolve more radically in the next few decades. PMID:23867294

Pezzotti, Giuseppe; Yamamoto, Kengo

2014-03-01

227

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the second quarterly progress report for Year 2 of the ACTS project. It includes a review of progress made in Flow Loop development and research during the period of time between Oct 1, 2000 and December 31, 2000. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 2: Addition of a foam generation and breaker system), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (c) Research project (Task 7): ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (d) Research project (Task 8): ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (e) Research project (Task 9): ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (g) Research on instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), and Foam properties while transporting cuttings. (Task 12), (h) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S). (i) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members. The tasks Completed During This Quarter are Task 7 and Task 8.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Barkim Demirdal; Affonso Lourenco; Evren Ozbayoglu; Paco Vieira; Lei Zhou

2000-01-30

228

Autophagy and cartilage homeostasis mechanisms in joint health, aging and OA  

Microsoft Academic Search

Osteoarthritis (OA) is the most prevalent joint disease, but neither preventive measures nor disease-modifying drugs are available and a continuing need exists for safe and effective symptom-modifying therapies. Clinical trials of candidate disease-modifying OA drugs in patients with established or advanced disease have not demonstrated their efficacy, but these failed trials have motivated investigation into the mechanisms that maintain joint

Beatriz Caramés; Martin K. Lotz

2011-01-01

229

JANNAF 35th Combustion Subcommittee and 17th Propulsion Systems Hazards Subcommittee Meeting: Joint Sessions  

NASA Technical Reports Server (NTRS)

This publication is a compilation of 15 unclassified/unlimited technical papers presented at the 1998 meeting of the Joint Army-Navy-NASA-Air Force (JANNAF) Combustion Subcommittee (CS) and Propulsion Systems Hazards Subcommittee (PSHS) held jointly with the Airbreathing Propulsion Subcommittee (APS). The meeting was held on 7 - 11 December 1 998 at Raytheon Systems Company and the Marriott Hotel, Tucson, AZ. Topics covered include advanced ingredients and reaction kinetics in solid propellants and experimental diagnostic techniques.

Fry, Ronald S. (Editor); Gannaway, Mary T. (Editor); Rognan, Melanie (Editor)

1998-01-01

230

Test and analysis of Celion 3000/PMR-15, graphite/polyimide bonded composite joints: Summary  

NASA Technical Reports Server (NTRS)

Standard single lap, double lap and symmetric step lap bonded joints of Celion 3000/PMR-15 graphite/polyimide composite were evaluated. Composite to composite and composite to titanium joints were tested at 116K (-250 F), 294K (70 F) and 561K (550 F). Joint parameters evaluated were lap length, adherend thickness, adherend axial stiffness, lamina stacking sequence and adherend tapering. Tests of advanced joint concepts were also conducted to establish the change in performance of preformed adherends, scalloped adherends and hybrid systems. Special tests were conducted to establish material properties of the high temperature adhesive, designated A7F, used for bonding. Most of the bonded joint tests resulted in interlaminar shear or peel failures of the composite. There were very few adhesive failures. Average test results agree with expected performance trends for the various test parameters. Results of finite element analyses and of test/analysis correlations are also presented.

Cushman, J. B.; Mccleskey, S. F.; Ward, S. H.

1983-01-01

231

Pathogenesis of discovertebral and manubriosternal joint abnormalities in rheumatoid arthritis: a cadaveric study.  

PubMed

The precise pathogenesis of discovertebral lesions in rheumatoid arthritis has long been debated with the emergence of 2 conflicting theories: discovertebral extension of synovial inflammation from a neighboring articulation (Luschka, costovertebral joint) and repetitive discal trauma with Schmorl's nodes. In order to address this controversy, we performed a radiographic-pathologic correlation of a rheumatoid cadaver and compared the alterations seen in the cervical and lumbar discovertebral junction; we further included an evaluation of the manubriosternal joint, another cartilaginous articulation. Our data confirmed that advanced discovertebral lesions in the cervical and lumbar spine are related primarily to endplate failure that itself is caused by apophyseal joint destruction and segmental spinal instability, although inflammatory rheumatoid lesions of the cervical intervertebral discs probably arising from the Luschka joints are also evident. Conversely, the lesions of the manubriosternal joint were produced by inflammatory changes related to the development of a synovial cavity in the articulation. PMID:2724247

Schils, J P; Resnick, D; Haghighi, P N; Trudell, D; Sartoris, D J

1989-03-01

232

Elasto-Plastic Analysis of Tee Joints Using HOT-SMAC  

NASA Technical Reports Server (NTRS)

The Higher Order Theory - Structural/Micro Analysis Code (HOT-SMAC) software package is applied to analyze the linearly elastic and elasto-plastic response of adhesively bonded tee joints. Joints of this type are finding an increasing number of applications with the increased use of composite materials within advanced aerospace vehicles, and improved tools for the design and analysis of these joints are needed. The linearly elastic results of the code are validated vs. finite element analysis results from the literature under different loading and boundary conditions, and new results are generated to investigate the inelastic behavior of the tee joint. The comparison with the finite element results indicates that HOT-SMAC is an efficient and accurate alternative to the finite element method and has a great deal of potential as an analysis tool for a wide range of bonded joints.

Arnold, Steve M. (Technical Monitor); Bednarcyk, Brett A.; Yarrington, Phillip W.

2004-01-01

233

Advanced Group Support Systems and Facilities  

NASA Technical Reports Server (NTRS)

The document contains the proceedings of the Workshop on Advanced Group Support Systems and Facilities held at NASA Langley Research Center, Hampton, Virginia, July 19-20, 1999. The workshop was jointly sponsored by the University of Virginia Center for Advanced Computational Technology and NASA. Workshop attendees came from NASA, other government agencies, industry, and universities. The objectives of the workshop were to assess the status of advanced group support systems and to identify the potential of these systems for use in future collaborative distributed design and synthesis environments. The presentations covered the current status and effectiveness of different group support systems.

Noor, Ahmed K. (Compiler); Malone, John B. (Compiler)

1999-01-01

234

The complexity of joint computation  

E-print Network

Joint computation is the ubiquitous scenario in which a computer is presented with not one, but many computational tasks to perform. A fundamental question arises: when can we cleverly combine computations, to perform them ...

Drucker, Andrew Donald

2012-01-01

235

JOINT NOTICE OF PRIVACY PRACTICES  

E-print Network

JOINT NOTICE OF PRIVACY PRACTICES THIS NOTICE DESCRIBES HOW MEDICAL INFORMATION ABOUT YOU MAY disclosure of your immunization data to the Wisconsin Immunization Registry. A request for restriction should

236

A simple nonlinear joint model  

NASA Technical Reports Server (NTRS)

Hertzian contact theory is applied to a butt joint with specially mismatched bearing surfaces to devise a simple mathematical model of nonlinear axial force-displacement behavior in jointed members. Normalized tangent stiffness-force plots, for several values of a joint imperfection parameter, are presented for the sample case of solid structural members of circular section. The results illustrate the potential problem of high joint compliance at low axial-force levels, as well as the generally desirable stiffening and linearizing effects of preload. A nonlinear oscillator problem based on the static model is also formulated and solved to illustrate the effect of amplitude on natural frequency. As expected, natural frequency is low when amplitude is small. The results call attention to the important roles that tight tolerances and preload are expected to play in the design and fabrication of deployable and erectable truss-type space structures.

Fichter, W. B.

1986-01-01

237

A pain in the joints.  

PubMed

Arthralgia is a rare but recognised complication of meningococcal septicaemia. We report a case of a 29-year-old man presenting with a 24?h history of fever, joint swelling and subsequent development of a non-blanching, petechial rash. He was treated for probable meningococcal septicaemia and the causative pathogen was later identified as Neisseria meningitidis. He was treated with ceftriaxone and after 10?days the pain and swelling in his joints improved. PMID:25694633

Peters, Rosie; Virani, Farzana; Haddadin, Yazan; Baldowska, Helena

2015-01-01

238

Joint probabilities and quantum cognition  

E-print Network

In this paper we discuss the existence of joint probability distributions for quantum-like response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

J. Acacio de Barros

2012-06-26

239

Joint probabilities and quantum cognition  

SciTech Connect

In this paper we discuss the existence of joint probability distributions for quantumlike response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

Acacio de Barros, J. [Liberal Studies, 1600 Holloway Ave., San Francisco State University, San Francisco, CA 94132 (United States)

2012-12-18

240

Analysis of selected compression splice joint locations in a graphite-epoxy transport wing stub box  

NASA Technical Reports Server (NTRS)

Three critical compression splice joint locations in a stitched graphite-epoxy transport wing stub box have been analyzed to determine their expected structural performance. The wing box is representative of a section of a commercial transport wing box and was designed and constructed by McDonnell Douglas Aerospace Company as part of the NASA Advanced Composites Technology (ACT) program. The results of the finite element analyses of the splice joints are presented. The analysis results indicate that failure will not occur in the splice joint regions for loads less than the Design Ultimate Load of the wing box.

Jegley, Dawn C.

1995-01-01

241

Advanced Microsensors  

NASA Technical Reports Server (NTRS)

This video looks at a spinoff application of the technology from advanced microsensors -- those that monitor and determine conditions of spacecraft like the Space Shuttle. The application featured is concerned with the monitoring of the health of premature babies.

1991-01-01

242

Young Children's Understanding of Joint Commitments  

ERIC Educational Resources Information Center

When adults make a joint commitment to act together, they feel an obligation to their partner. In 2 studies, the authors investigated whether young children also understand joint commitments to act together. In the first study, when an adult orchestrated with the child a joint commitment to play a game together and then broke off from their joint

Grafenhain, Maria; Behne, Tanya; Carpenter, Malinda; Tomasello, Michael

2009-01-01

243

Joint Press Release TWELFTH ITER NEGOTIATION MEETING  

E-print Network

Joint Press Release TWELFTH ITER NEGOTIATION MEETING Jeju, Korea, 6 December th 2005 Delegations on an Agreement on the joint implementation of the ITER international fusion energy project. This was the first/6/05 1:21 PMDraft Joint News Release Page 1 of 2http://www.iter.org/N_12_Joint_Press_Release.htm #12

244

7 CFR 97.14 - Joint applicants.  

Code of Federal Regulations, 2013 CFR

...Agriculture 3 2013-01-01 2013-01-01 false Joint applicants. 97.14 Section 97.14 Agriculture...VARIETY AND PROTECTION The Application § 97.14 Joint applicants. (a) Joint owners shall file a joint application by...

2013-01-01

245

7 CFR 97.14 - Joint applicants.  

Code of Federal Regulations, 2012 CFR

...Agriculture 3 2012-01-01 2012-01-01 false Joint applicants. 97.14 Section 97.14 Agriculture...VARIETY AND PROTECTION The Application § 97.14 Joint applicants. (a) Joint owners shall file a joint application by...

2012-01-01

246

7 CFR 97.14 - Joint applicants.  

Code of Federal Regulations, 2011 CFR

...Agriculture 3 2011-01-01 2011-01-01 false Joint applicants. 97.14 Section 97.14 Agriculture...VARIETY AND PROTECTION The Application § 97.14 Joint applicants. (a) Joint owners shall file a joint application by...

2011-01-01

247

7 CFR 97.14 - Joint applicants.  

Code of Federal Regulations, 2010 CFR

...Agriculture 3 2010-01-01 2010-01-01 false Joint applicants. 97.14 Section 97.14 Agriculture...VARIETY AND PROTECTION The Application § 97.14 Joint applicants. (a) Joint owners shall file a joint application by...

2010-01-01

248

7 CFR 97.14 - Joint applicants.  

...Agriculture 3 2014-01-01 2014-01-01 false Joint applicants. 97.14 Section 97.14 Agriculture...VARIETY AND PROTECTION The Application § 97.14 Joint applicants. (a) Joint owners shall file a joint application by...

2014-01-01

249

SAMPLE Joint Venture Agreement [March 2010  

E-print Network

SAMPLE Joint Venture Agreement [March 2010] This Joint Venture Agreement (JVA) is entered and Technology (NIST) as a joint venture (JV) to conduct certain specified research; Whereas, the Parties wish _____________________________ to serve as the JV Administrator (Administrator) for the joint venture and wish to authorize

Magee, Joseph W.

250

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2011 CFR

...Transportation 4 2011-10-01 2011-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2011-10-01

251

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2012 CFR

...Transportation 4 2012-10-01 2012-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2012-10-01

252

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2010 CFR

...Transportation 4 2010-10-01 2010-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2010-10-01

253

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2013 CFR

...Transportation 4 2013-10-01 2013-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2013-10-01

254

How joint is the joint attention of apes and human infants? Malinda Carpenter  

E-print Network

How joint is the joint attention of apes and human infants? Malinda Carpenter Josep Call Department In press, Agency and joint attention, H.S. Terrace & J. Metcalfe (Eds.). New York: Oxford University Press. #12;The jointness of joint attention 2 Abstract In this chapter we first argue (following Tomasello

Carpenter, M.alinda

255

Prosthetic Joint Infections in Elderly Patients  

Microsoft Academic Search

Although prosthetic joint infections (PJIs) occur in a small proportion of patients following total joint arthroplasty, they\\u000a have catastrophic consequences on morbidity and joint function and carry a high economic burden in the elderly patients.\\u000a \\u000a Clinical presentation of prosthetic joint infection is highly variable, and differentiating a painful joint arthroplasty secondary\\u000a to mechanical loosening from an indolent infection can be

Camelia E Marculescu; Elie F. Berbari; Douglas R. Osmon

256

Management of acromioclavicular joint injuries.  

PubMed

Acromioclavicular joint injuries are among the most common shoulder girdle injuries in athletes and most commonly result from a direct force to the acromion with the arm in an adducted position. Acromioclavicular joint injuries often present with associated injuries to the glenohumeral joint, including an increased incidence of superior labrum anterior posterior (SLAP) tears that may warrant further evaluation and treatment. Anteroposterior stability of the acromioclavicular joint is conferred by the capsule and acromioclavicular ligaments, of which the posterior and superior ligaments are the strongest. Superior-inferior stability is maintained by the coracoclavicular (conoid and trapezoid) ligaments. Type-I or type-II acromioclavicular joint injuries have been treated with sling immobilization, early shoulder motion, and physical therapy, with favorable outcomes. Return to activity can occur when normal shoulder motion and strength are obtained and the shoulder is asymptomatic as compared with the contralateral normal extremity. The management of type-III injuries remains controversial and is individualized. While a return to the previous level of functional activity with nonsurgical treatment has been documented in a number of case series, surgical reduction and coracoclavicular ligament reconstruction has been associated with a favorable outcome and can be considered in patients who place high functional demands on their shoulders or in athletes who participate in overhead sports. Surgical management is indicated for high-grade (?type IV) acromioclavicular joint injuries to achieve anatomic reduction of the acromioclavicular joint, reconstruction of the coracoclavicular ligaments, and repair of the deltotrapezial fascia. Outcomes after surgical reconstruction of the coracoclavicular ligaments have been satisfactory with regard to achieving pain relief and return to functional activities, but further improvements in the biomechanical strength of these constructs are necessary to avoid loss of reduction and creep with cyclic loading. PMID:24382728

Li, Xinning; Ma, Richard; Bedi, Asheesh; Dines, David M; Altchek, David W; Dines, Joshua S

2014-01-01

257

Recent Advances in Imaging in Psoriatic Arthritis  

PubMed Central

The recent introduction of effective therapies in psoriatic arthritis (PsA) has increased the demand for efficient tools for diagnosis, monitoring and prognostication of PsA, and has caused an increased research effort within imaging in this disease. The clinical appearance of PsA is very diverse, involving the spine, sacroiliac joints, peripheral joints and/or entheses, and accordingly imaging findings vary. In the present paper, we present a review of the recent advances in imaging in PsA, focusing primarily on ultrasonography and magnetic resonance imaging of peripheral disease manifestations. PMID:22870465

Poggenborg, René Panduro; Terslev, Lene; Pedersen, Susanne Juhl; Østergaard, Mikkel

2011-01-01

258

An analysis of a joint shear model for jointed media with orthogonal joint sets; Yucca Mountain Site Characterization Project  

SciTech Connect

This report describes a joint shear model used in conjunction with a computational model for jointed media with orthogonal joint sets. The joint shear model allows nonlinear behavior for both joint sets. Because nonlinear behavior is allowed for both joint sets, a great many cases must be considered to fully describe the joint shear behavior of the jointed medium. An extensive set of equations is required to describe the joint shear stress and slip displacements that can occur for all the various cases. This report examines possible methods for simplifying this set of equations so that the model can be implemented efficiently form a computational standpoint. The shear model must be examined carefully to obtain a computationally efficient implementation that does not lead to numerical problems. The application to fractures in rock is discussed. 5 refs., 4 figs.

Koteras, J.R.

1991-10-01

259

The Advanced Solid Rocket Motor  

NASA Technical Reports Server (NTRS)

The paper describes the Advanced Solid Rocket Motor (ASRM) that is being developed to replace, in 1997, the Redesigned Solid Rocket Motor which currently boosts the Space Shuttle. The ASRM will contain features to improve motor safety (fewer potential leak paths, improved seal materials, stronger case material, and fewer nozzle and case joints), an improved ignition system using through-bulkhead initiators, and highly reproducible manufacturing and inspection techniques with a large number of automated procedures. The ASRM will be able to deliver 12,000 lbs greater payloads to any given orbit of the Shuttle. There are also environmental improvements, realized by waste propellant recovery.

Mitchell, Royce E.

1992-01-01

260

Technique and application for quantifying dynamic shoulder joint kinematics and glenohumeral joint contact patterns  

E-print Network

The shoulder (glenohumeral) joint has the greatest range of motion of all human joints; as a result, it is particularly vulnerable to dislocation and injury. The ability to accurately measure dynamic in-vivo joint kinematics ...

Massimini, Daniel Frank

2014-01-01

261

ROUTINE THREE-DIMENSIONAL MAGNETIC RESONANCE IMAGING OF JOINTS  

PubMed Central

Due to its high spatial resolution and excellent tissue contrast, magnetic resonance (MR) imaging has become the most commonly used imaging method to evaluate joints. Most musculoskeletal MR imaging is performed using two-dimensional fast spin-echo sequences. However, three-dimensional sequences have also been used for joint imaging and have the advantage of acquiring thin continuous slices through joints which reduces the effects of partial volume averaging. With recent advances in MR technology, three-dimensional sequences with isotropic resolution have been developed. These sequences allow high quality multi-planar reformat images to be obtained following a single acquisition, thereby eliminating the need to repeat sequences with identical tissue contrast in different planes. Preliminary results on the diagnostic performance of three-dimensional isotropic resolution sequences are encouraging. However, additional studies are needed to determine whether these sequences can replace currently used two-dimensional fast spin-echo sequences for providing comprehensive joint assessment in clinical practice. PMID:21448939

Kijowki, Richard; Gold, Garry E.

2011-01-01

262

Advanced rotorcraft transmission program  

NASA Technical Reports Server (NTRS)

The Advanced Rotorcraft Transmission (ART) program is an Army-funded, joint Army/NASA program to develop and demonstrate lightweight, quiet, durable drivetrain systems for next generation rotorcraft. ART addresses the drivetrain requirements of two distinct next generation aircraft classes: Future Air Attack Vehicle, a 10,000 to 20,000 lb. aircraft capable of undertaking tactical support and air-to-air missions; and Advanced Cargo Aircraft, a 60,000 to 80,000 lb. aircraft capable of heavy life field support operations. Both tiltrotor and more conventional helicopter configurations are included in the ART program. Specific objectives of ART include reduction of drivetrain weight by 25 percent compared to baseline state-of-the-art drive systems configured and sized for the next generation aircraft, reduction of noise level at the transmission source by 10 dB relative to a suitably sized and configured baseline, and attainment of at least a 5000 hr mean-time-between-removal. The technical approach for achieving the ART goals includes application of the latest available component, material, and lubrication technology to advanced concept drivetrains that utilize new ideas in gear configuration, transmission layout, and airframe/drivetrain integration. To date, candidate drivetrain systems were carried to a conceptual design stage, and tradeoff studies were conducted resulting in selection of an ART transmission configuration for each of the four contractors. The final selection was based on comparative weight, noise, and reliability studies. A description of each of the selected ART designs is included. Preliminary design of each of the four selected ART transmission was completed, as have mission impact studies wherein comparisons of aircraft mission performance and life cycle costs are undertaken for the next generation aircraft with ART and with the baseline transmission.

Bill, Robert C.

1990-01-01

263

FRF based joint dynamics modeling and identification  

NASA Astrophysics Data System (ADS)

Complex structures, such as machine tools, are comprised of several substructures connected to each other through joints to form the assembled structures. Joints can have significant contributions on the behavior of the overall assembly and ignoring joint effects in the design stage may result in considerable deviations from the actual dynamic behavior. The identification of joint dynamics enables us to accurately predict overall assembled dynamics by mathematically combining substructure dynamics through the equilibrium and compatibility conditions at the joint. The essence of joint identification is the determination of the difference between the measured overall dynamics and the rigidly coupled substructure dynamics. In this study, we investigate the inverse receptance coupling (IRC) method and the point-mass joint model, which considers the joint as lumped mass, damping and stiffness elements. The dynamic properties of the joint are investigated using both methods through a finite element (FE) simulation and experimental tests. `100

Mehrpouya, Majid; Graham, Eldon; Park, Simon S.

2013-08-01

264

Joint measurability through Naimark's theorem  

E-print Network

We use Naimark's dilation theorem in order to characterize the joint measurability of two POVMs. Then, we analyze the joint measurability of two commutative POVMs $F_1$ and $F_2$ which are the smearing of two self-adjoint operators $A_1$ and $A_2$ respectively. We prove that the compatibility of $F_1$ and $F_2$ is connected to the existence of two compatible self-adjoint dilations $A_1^+$ and $A_2^+$ of $A_1$ and $A_2$ respectively. As a corollary we prove that each couple of self-adjoint operators can be dilated to a couple of compatible self-adjoint operators. Next, we analyze the joint measurability of the unsharp position and momentum observables and show that it provides a master example of the scheme we propose. Finally, we give a sufficient condition for the compatibility of two effects.

Roberto Beneduci

2014-04-05

265

Mechanobiological simulations of prenatal joint morphogenesis.  

PubMed

Joint morphogenesis is the process in which prenatal joints acquire their reciprocal and interlocking shapes. Despite the clinical importance of the process, it remains unclear how joints acquire their shapes. In this study, we simulate 3D mechanobiological joint morphogenesis for which the effects of a range of movements (or lack of movement) and different initial joint shapes are explored. We propose that static hydrostatic compression inhibits cartilage growth while dynamic hydrostatic compression promotes cartilage growth. Both pre-cavitational (no muscle contractions) and post-cavitational (with muscle contractions) phases of joint development were simulated. Our results showed that for hinge type motion (planar motion from 45° to 120°) the proximal joint surface developed a convex profile in the posterior region and the distal joint surface developed a slightly concave profile. When 3D movements from 40° to -40° in two planes were applied, simulating a rotational movement, the proximal joint surface developed a concave profile whereas the distal joint surface rudiment acquire a rounded convex profile, showing an interlocking shape typical of a ball and socket joint. The significance of this research is that it provides new and important insights into normal and abnormal joint development, and contributes to our understanding of the mechanical factors driving very early joint morphogenesis. An enhanced understanding of how prenatal joints form is critical for developing strategies for early diagnosis and preventative treatments for congenital musculoskeletal abnormalities such as developmental dysplasia of the hip. PMID:24529755

Giorgi, Mario; Carriero, Alessandra; Shefelbine, Sandra J; Nowlan, Niamh C

2014-03-21

266

Joint strength in RCS frames  

E-print Network

. 2 Specimen 2. . . . . . . 4. 5. 2. 3 Specimen 3 4. 5. 2. 4 Specimen 4, 4. 6 PREDICTED FAILURE MECHANISMS (CONTINUOUS BEAM DIRECTION) . . 4. 6. 1 ASCE Design Equations (ASCE 1994) 4 6, 1. 1 Joint Panel Shear 4. 6. 1. 2 Vertical Bearing . 4. 6... Vertical Bearing. 4. 6. 4 Beam Failure Mechanism. Page 4. 6. 5 Column Failure Mechanism 4. 6. 6 Predicted Failure Mechanisms 4. 7 JOINT STRENGTH PREDICTIONS (DISCONTINUOUS BEAM DIRECTION). 5. RESPONSE 5. 1 INTRODUCTION . . 5. 2. GENERAL BEHAVIOR 5...

Kirby, Cynthia Dawn

1998-01-01

267

Solder Joint Health Monitoring Testbed  

NASA Technical Reports Server (NTRS)

A method of monitoring the health of selected solder joints, called SJ-BIST, has been developed by Ridgetop Group Inc. under a Small Business Innovative Research (SBIR) contract. The primary goal of this research program is to test and validate this method in a flight environment using realistically seeded faults in selected solder joints. An additional objective is to gather environmental data for future development of physics-based and data-driven prognostics algorithms. A test board is being designed using a Xilinx FPGA. These boards will be tested both in flight and on the ground using a shaker table and an altitude chamber.

Delaney, Michael M.; Flynn, James G.; Browder, Mark E.

2009-01-01

268

First metatarsophalangeal joint range of motion : influence of ankle joint position and gastrocsoleus muscle stretching.  

E-print Network

??[Truncated abstract] First metatarsophalangeal joint (MTPJ1) motion is an important factor in normal weight transference during walking. Disruptions to normal range can influence joints both… (more)

North, Ian Graham

2008-01-01

269

Advanced information processing system for advanced launch system: Avionics architecture synthesis  

NASA Technical Reports Server (NTRS)

The Advanced Information Processing System (AIPS) is a fault-tolerant distributed computer system architecture that was developed to meet the real time computational needs of advanced aerospace vehicles. One such vehicle is the Advanced Launch System (ALS) being developed jointly by NASA and the Department of Defense to launch heavy payloads into low earth orbit at one tenth the cost (per pound of payload) of the current launch vehicles. An avionics architecture that utilizes the AIPS hardware and software building blocks was synthesized for ALS. The AIPS for ALS architecture synthesis process starting with the ALS mission requirements and ending with an analysis of the candidate ALS avionics architecture is described.

Lala, Jaynarayan H.; Harper, Richard E.; Jaskowiak, Kenneth R.; Rosch, Gene; Alger, Linda S.; Schor, Andrei L.

1991-01-01

270

Research Advances  

ERIC Educational Resources Information Center

Research advances, a new feature in Journal of Chemical Engineering that brings information about innovations in current areas of research to high school and college science faculty with an intent to provide educators with timely descriptions of latest progress in research that can be integrated into existing courses to update course content and…

King, Angela G.

2004-01-01

271

Technical status of the Dish/Stirling Joint Venture Program  

SciTech Connect

Initiated in 1991; the Dish/Stirling Joint Venture Program (DSJVP) is a 5-year, $17.2 million joint venture which is funded by Cummins Power Generation, Inc. (CPG) of Columbus, Indiana and the United States Department of Energy`s (DOE) Solar Thermal and Biomass Power Division. Sandia National Laboratories administers and provides technical management for this contract on the DOE`s behalf. In January, 1995; CPG advanced to Phase 3 of this three-phase contract. The objective of the DSJVP is to develop and commercialize a 7-kW. Dish/Stirling System for remote power markets by 1997. In this paper, the technical status of the major subsystems which comprise the CPG 7-kW{sub e} Dish/Stirling System is presented. These subsystems include the solar concentrator, heat pipe receiver, engine/alternator, power conditioning, and automatic controls.

Bean, J.R. [Cummins Power Generation, Inc., Columbus, IN (United States); Diver, R.B. [Sandia National Labs., Albuquerque, NM (United States)

1995-06-01

272

JANUARY 1989 V' PUBLISHED BY THE AMERICAN WELDING SOCIETY TO ADVANCE  

E-print Network

by Professor T. Kuwana (Tohoku University) Technical Committee on Fatigue Strength of Welded Joints ChairedA JANUARY 1989 V' PUBLISHED BY THE AMERICAN WELDING SOCIETY TO ADVANCE THE SCIENCE, TECHNOLOGY AND APPLICAliON OF WELDING ...I

Eagar, Thomas W.

273

Plating To Reinforce Welded Joints  

NASA Technical Reports Server (NTRS)

Electrodeposition used to strengthen welded joints gouged, nicked, or suffered other mechanical damage. Plating cell, typically of acrylic plastic such as poly (Methylmetacrylate), is assembled around part to be plated. Areas not to be plated are masked with plater's tape. Weld area is plated in standard nickel-plating process.

Otousa, J. E.

1982-01-01

274

Sea Lion Skeleton (Gliding Joint)  

NSDL National Science Digital Library

Sea lions are vertebrates with both backbones and ribs. The backbone is a gliding joint, allowing the animal to be flexible, while the ribs main function is to protect it's inner organs. The short tail helps to balance the animal while walking on land.

Ketan Patel (California State University, Fullerton;Student, B)

2007-07-14

275

Joint measurements and Svetlichny's inequality  

E-print Network

We prove that the Svetlichny's inequality can be derived from the existence of joint measurements and the principle of no-signaling. Then we show that, on the basis of quantum measurement assumption, it would imply the breach of causality if the magnitude of violation of Svetlichny's inequality exceeds quantum bound.

Yang Xiang; Wei Ren

2010-12-27

276

A JOINT PROGRAM OF Interactive  

E-print Network

TECHNOLOGY #12;Specialist areas in the multimedia sectors are growing rapidly in North America, Asia, imagination, fun and technology. The Interactive Multimedia and Design (IMD) program providesA JOINT PROGRAM OF Interactive Multimedia and Design www.bitdegree.ca BACHELOR OF INFORMATION

Dawson, Jeff W.

277

The Rationale for Joint Mobilization.  

ERIC Educational Resources Information Center

This paper presents an overview of the functions of connective tissue and the mechanisms of joint injury and contracture formation in relation to therapeutic exercise. The components of connective tissue operation are explained, including fibroblasts, macrophages, plasma cells, and collagen. An examination of the histology of connective tissue as…

Burkhardt, Sandy

278

Solders in Real Electronic Joints  

NASA Astrophysics Data System (ADS)

Undercooling and recalescence were studied using the differential scanning calorimetry (DSC) method on real electronic systems. Two solder pastes, Sn62.5Pb36.5Ag1 and Sn96.5Ag3Cu0.5, were used for preparation of electronic joints. Various combinations of these solders and soldering pads with different surface finishes such as Cu, Cu-Ni-Au, Cu-Sn, and Cu-Sn99Cu1 were used. During melting of both pastes, the Sn and Sn99Cu1 surface finishes immediately dissolved in the solder and the Cu surface coating was exposed to the melt. Therefore, practically the same undercooling was found for the Cu, Cu-Sn, and Cu-Sn99Cu1 coatings. The lowest undercooling was found for the Cu-Ni-Au surface finish for both solder pastes. If two separated electronic joints were made on the sample, two separate peaks were found in the DSC signal during solidification. In the sample with only one joint, only one exothermic peak was found. These findings were observed for all paste/surface finish combinations. These data were analyzed, showing that this effect is a consequence of undercooling and recalescence: Latent heat released during solidification of the joint increases the surrounding temperature and influences all the processes taking place.

Rudajevová, A.; Dušek, K.

2014-07-01

279

The Joint Gravity Model 3  

Microsoft Academic Search

An improved Earth geopotential model, complete to spherical harmonic degree and order 70, has been determined by combining the Joint Gravity Model 1 (JGM 1) geopotential coefficients, and their associated error covariance, with new information from SLR, DORIS, and GPS tracking of TOPEX\\/Poseidon, laser tracking of LAGEOS 1, LAGEOS 2, and Stella, and additional DORIS tracking of SPOT 2. The

B. D. Tapley; M. M. Watkins; J. C. Ries; G. W. Davis; R. J. Eanes; S. R. Poole; H. J. Rim; B. E. Schutz; C. K. Shum; R. S. Nerem; F. J. Lerch; J. A. Marshall; S. M. Klosko; N. K. Pavlis; R. G. Williamson

1996-01-01

280

Arthrodesis of the Trapeziometacarpal Joint  

Microsoft Academic Search

Over a 10-year period, 32 trapeziometacarpal (TM) joint fusions were performed in 29 patients, and reviewed. Pin fixation with tension band wiring was used in 14 cases, screws in eight cases, a plate in six cases, K-wires in three cases and staple fixation in one case. None was bone grafted. Splinting was applied for 4 to 5 weeks. There were

A. CHAMAY; F. PIAGET-MOREROD

1994-01-01

281

The Joint M requires 42  

E-print Network

Term, First Y se 0 Managerial Eco Financial Manag 11 Management 16 Production M Core Course (se g TermThe Joint M towards bo requires 42 Fall Term, Course AC 506 Ma MKT 518 M MGT 517 Or OM 506 Dec ST 509 Stati Summer: Fall Term, Course GBA 525 Bu MGT 542 M MBA Electiv MSCE Electi MSCE Core

Carver, Jeffrey C.

282

Cryopumping Field Joint Can Testing  

NASA Technical Reports Server (NTRS)

For long installations, vacuum jacketed piping often comes in 40 foot sections that are butt welded together in the field. A short can is then welded over the bare pipe connection to allow for insulation to be protected from the environment. Traditionally, the field joint is insulated with multilayer insulation and a vacuum is pulled on the can to minimize heat leak through the bare section and prevent frost from forming on the pipe section. The vacuum jacketed lines for the Ares I mobile launch platform were to be a combined 2000 feet long, with 60+ pipe sections and field joint cans. Historically, Kennedy Space Center has drilled a hole in the long sections to create a common vacuum with the field joint can to minimize maintenance on the vacuum jacketed piping. However, this effort looked at ways to use a passive system that didn't require a vacuum, but may cryopump to create its own vacuum. Various forms of aerogel, multilayer insulations, and combinations thereof were tested to determine the best method of insulating the field joint while minimizing maintenance and thermal losses.

Johnson, Wesley L.; Fesmire, James E.; Meneghelli, Barry E.

2011-01-01

283

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2013 CFR

...metatarsal and tarsal joints of the lower extremities, the cervical vertebrae, the dorsal vertebrae, and the lumbar vertebrae...be a group of minor joints, ratable on disturbance of lumbar spine...

2013-07-01

284

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2012 CFR

...metatarsal and tarsal joints of the lower extremities, the cervical vertebrae, the dorsal vertebrae, and the lumbar vertebrae...be a group of minor joints, ratable on disturbance of lumbar spine...

2012-07-01

285

38 CFR 4.45 - The joints.  

...metatarsal and tarsal joints of the lower extremities, the cervical vertebrae, the dorsal vertebrae, and the lumbar vertebrae...be a group of minor joints, ratable on disturbance of lumbar spine...

2014-07-01

286

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2011 CFR

...metatarsal and tarsal joints of the lower extremities, the cervical vertebrae, the dorsal vertebrae, and the lumbar vertebrae...be a group of minor joints, ratable on disturbance of lumbar spine...

2011-07-01

287

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2010 CFR

...metatarsal and tarsal joints of the lower extremities, the cervical vertebrae, the dorsal vertebrae, and the lumbar vertebrae...be a group of minor joints, ratable on disturbance of lumbar spine...

2010-07-01

288

JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO  

E-print Network

JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO 2001 TRANSPORTATION TOMORROW SURVEY of Transportation, Ontario Additions in 1996 Regional Municipalities of Niagara, Waterloo Counties of Peterborough not to participate) #12;JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO 2001 TRANSPORTATION TOMORROW SURVEY

Toronto, University of

289

Center Establishment, & Joint and Interdisciplinary Appointments  

E-print Network

and interdisciplinary appointments: A. Center Establishment and/or Search and Recruitment 1. Total funding, bothCenter Establishment, & Joint and Interdisciplinary Appointments: Best Practices and Required Agreements Given the increasing number of interdisciplinary centers, and corresponding joint and

Farritor, Shane

290

49 CFR 583.15 - Joint ownership.  

Code of Federal Regulations, 2013 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AUTOMOBILE PARTS CONTENT LABELING § 583.15 Joint ownership. ...compliance with all the manufacturer requirements in this part with respect to the jointly owned carline....

2013-10-01

291

49 CFR 583.15 - Joint ownership.  

Code of Federal Regulations, 2012 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AUTOMOBILE PARTS CONTENT LABELING § 583.15 Joint ownership. ...compliance with all the manufacturer requirements in this part with respect to the jointly owned carline....

2012-10-01

292

49 CFR 583.15 - Joint ownership.  

Code of Federal Regulations, 2011 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AUTOMOBILE PARTS CONTENT LABELING § 583.15 Joint ownership. ...compliance with all the manufacturer requirements in this part with respect to the jointly owned carline....

2011-10-01

293

49 CFR 583.15 - Joint ownership.  

Code of Federal Regulations, 2010 CFR

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AUTOMOBILE PARTS CONTENT LABELING § 583.15 Joint ownership. ...compliance with all the manufacturer requirements in this part with respect to the jointly owned carline....

2010-10-01

294

49 CFR 583.15 - Joint ownership.  

...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AUTOMOBILE PARTS CONTENT LABELING § 583.15 Joint ownership. ...compliance with all the manufacturer requirements in this part with respect to the jointly owned carline....

2014-10-01

295

PROCEEDINGS: 1985 JOINT SYMPOSIUM ON STATIONARY COMBUSTION NOX CONTROL. VOLUME 1. UTILITY BOILER APPLICATIONS  

EPA Science Inventory

The two-volume proceedings document the more than 60 papers, describing recent advances in NOx control technology, that were presented at the 1985 Joint Symposium on Stationary Combustion NOx Control, May 6-9, 1985, in Boston, MA. The papers covered the following topics: the stat...

296

Clinical correlation of MRI findings of internal derangements of the temporomandibular joints  

Microsoft Academic Search

We studied 131 temporomandibular joints (TMJs) in 73 patients (56 women, 17 men) with internal derangement using magnetic resonance imaging (MRI) in addition to clinical examinations.The type of TMJ sounds correlated significantly with the degree of disc displacement. Rounded and folded disc deformities caused crepitus, which was a sign of the advanced stage of anterior disc displacement without reduction. Tenderness

N Ta?kaya-Yýlmaz; M Ö?ütcen-Toller

2002-01-01

297

Joint Texture and Depth Map Video Coding Based on the Scalable Extension of H.264/AVC  

E-print Network

Joint Texture and Depth Map Video Coding Based on the Scalable Extension of H.264/AVC Siping Tao1 video applications, both the texture video and its associated depth map are required for transmission.g. the Advanced Video Coding (H.264/AVC) standard, can be adopted to compress the depth map using the 4:0:0 chroma

Gabbouj, Moncef

298

Computer Assisted Surgery and Current Trends in Orthopaedics Research and Total Joint Replacements  

Microsoft Academic Search

Musculoskeletal research has brought about revolutionary changes in our ability to perform high precision surgery in joint replacement procedures. Recent advances in computer assisted surgery as well better materials have lead to reduced wear and greatly enhanced the quality of life of patients. The new surgical techniques to reduce the size of the incision and damage to underlying structures have

Farid Amirouche

2008-01-01

299

Joint Assessment of the Employment Policy Priorities of the Republic of Croatia  

Microsoft Academic Search

In line with the Accession Partnership, the Government of the Republic of Croatia, Ministry of Economy, Labour and Entrepreneurship has prepared together with the European Commission, Directorate General for Employment, Social Affairs and Equal Opportunities a Joint Assessment of Croatia's employment policy priorities. This document presents an agreed set of employment policy objectives necessary to advance the country's labour market

2008-01-01

300

Advanced computing  

NASA Technical Reports Server (NTRS)

Advanced concepts in hardware, software and algorithms are being pursued for application in next generation space computers and for ground based analysis of space data. The research program focuses on massively parallel computation and neural networks, as well as optical processing and optical networking which are discussed under photonics. Also included are theoretical programs in neural and nonlinear science, and device development for magnetic and ferroelectric memories.

1991-01-01

301

Experimental and numeric analysis of constraints in a bonded stepped lap joint subjected to traction  

NASA Astrophysics Data System (ADS)

The analysis of the constraints on glued stepped lap joints is not sufficiently advanced that predictions on the fracture or fatigue behavior of such joints can be made. This report presents an experimental and numeric analysis of such joints. The experimental setup involved a four step steel member adhesively joined to a glass epoxy member by Eponal adhesive. The mechanical properties of the components of the assembly were measured by elastic extensiometry. The evolution of acoustic emissions and the surface deformation of the members were measured simultaneously. It is notable that the first acoustic emission event coincided with the first change in the slope of the deformation - constraint curve. A material resistance approximation based on the elongation of each step and on weakness in the width of the joint was used in the numerical analysis.

Gilibert, Yvon; Rigolot, Alain

1989-05-01

302

Analytical and Experimental Assessment of Seismic Vulnerability of Beam-Column Joints without Transverse Reinforcement in Concrete Buildings  

NASA Astrophysics Data System (ADS)

Beam-column joints in concrete buildings are key components to ensure structural integrity of building performance under seismic loading. Earthquake reconnaissance has reported the substantial damage that can result from inadequate beam-column joints. In some cases, failure of older-type corner joints appears to have led to building collapse. Since the 1960s, many advances have been made to improve seismic performance of building components, including beam-column joints. New design and detailing approaches are expected to produce new construction that will perform satisfactorily during strong earthquake shaking. Much less attention has been focused on beam-column joints of older construction that may be seismically vulnerable. Concrete buildings constructed prior to developing details for ductility in the 1970s normally lack joint transverse reinforcement. The available literature concerning the performance of such joints is relatively limited, but concerns about performance exist. The current study aimed to improve understanding and assessment of seismic performance of unconfined exterior and corner beam-column joints in existing buildings. An extensive literature survey was performed, leading to development of a database of about a hundred tests. Study of the data enabled identification of the most important parameters and the effect of each parameter on the seismic performance. The available analytical models and guidelines for strength and deformability assessment of unconfined joints were surveyed and evaluated. In particular, The ASCE 41 existing building document proved to be substantially conservative in joint shear strength estimation. Upon identifying deficiencies in these models, two new joint shear strength models, a bond capacity model, and two axial capacity models designed and tailored specifically for unconfined beam-column joints were developed. The proposed models strongly correlated with previous test results. In the laboratory testing phase of the current study, four full-scale corner beam-column joint subassemblies, with slab included, were designed, built, instrumented, tested, and analyzed. The specimens were tested under unidirectional and bidirectional displacement-controlled quasi-static loading that incorporated varying axial loads that simulated overturning seismic moment effects. The axial loads varied between tension and high compression loads reaching about 50% of the column axial capacity. The test parameters were axial load level, loading history, joint aspect ratio, and beam reinforcement ratio. The test results proved that high axial load increases joint shear strength and decreases the deformability of joints failing in pure shear failure mode without beam yielding. On the contrary, high axial load did not affect the strength of joints failing in shear after significant beam yielding; however, it substantially increased their displacement ductility. Joint aspect ratio proved to be instrumental in deciding joint shear strength; that is the deeper the joint the lower the shear strength. Bidirectional loading reduced the apparent strength of the joint in the uniaxial principal axes. However, circular shear strength interaction is an appropriate approximation to predict the biaxial strength. The developed shear strength models predicted successfully the strength of test specimens. Based on the literature database investigation, the shear and axial capacity models developed and the test results of the current study, an analytical finite element component model based on a proposed joint shear stress-rotation backbone constitutive curve was developed to represent the behavior of unconfined beam-column joints in computer numerical simulations of concrete frame buildings. The proposed finite element model included the effect of axial load, mode of joint failure, joint aspect ratio and axial capacity of joint. The proposed backbone curve along with the developed joint element exhibited high accuracy in simulating the test response of the current test specimens as well as previous test joints. Fi

Hassan, Wael Mohammed

303

Fiber optics for advanced aircraft  

NASA Astrophysics Data System (ADS)

The increased use of composites makes the digital control more susceptible to electromagnetic effects. In order to provide the protection to the digital control additional shielding will be required as well as protective circuitry for the electronics. This results in increased weight and reduced reliability. The advantages that fiber optic technology provides for advanced aircraft applications is recognized. The use of optical signals to carry information between the aircraft and the control module provides immunity from contamination by electromagnetic sources as well as other important benefits such as reduced weight and volume resulting from the elimination of the shielding and the replacement of metal conductors with low weight glass fibers. In 1975 NASA began work to develop passive optical sensors for use with fiber optics in aircraft control systems. The problem now is to choose the best optical sensor concepts and evaluate them for use. In 1985 NASA and DOD entered into a joint program, Fiber Optic Control System Integration (FOCSI), to look at optical technology specifically for use in advanced aircraft systems. The results of this program are discussed. The conclusion of the study indicated that the use of fiber optic technology in advanced aircraft systems is feasible and desirable. The study pointed to a lack of available sensors from vendors capable of operating in the adverse environments of advanced aircraft.

Baumbick, Robert J.

1989-06-01

304

The frictional properties of joints in rock  

Microsoft Academic Search

Summary The conditions for sliding over artificial joint surfaces have been studied experimentally by cutting rock cylinders at various angles to their axes and studying slip over these surfaces in a triaxial testing apparatus. The types of joint used were: (i) filled with plaster to simulate a soft joint filling, (ii) bare surfaces ground approximately flat, and (iii) natural surfaces

J. C. Jaeger

1959-01-01

305

7 CFR 1956.110 - Joint debtors.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Joint debtors. 1956.110 Section 1956.110...Settlement-Community and Business Programs § 1956.110 Joint debtors. Settlements may not be approved for one joint debtor unless approved for all...

2011-01-01

306

Joint Seminar -Risk Management Institute and  

E-print Network

Joint Seminar - Risk Management Institute and Department of Finance Details of Seminar Date: 4 affine jump-diffusion models in capturing the joint dynamics of stock and option prices. We develop all the models we consider. Risk Management Institute Joint Seminar #12;

Chaudhuri, Sanjay

307

7 CFR 1956.110 - Joint debtors.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 2009-01-01 true Joint debtors. 1956.110 Section 1956.110...Settlement-Community and Business Programs § 1956.110 Joint debtors. Settlements may not be approved for one joint debtor unless approved for all...

2010-01-01

308

29 CFR 570.115 - Joint applicability.  

...2014-07-01 2014-07-01 false Joint applicability. 570.115 Section 570...Labor Standards Act of 1938, as Amended Joint and Separate Applicability of Sections 12(a) and 12(c) § 570.115 Joint applicability. The child labor...

2014-07-01

309

17 CFR 300.105 - Joint accounts.  

Code of Federal Regulations, 2012 CFR

...Exchanges 3 2012-04-01 2012-04-01 false Joint accounts. 300.105 Section 300.105 Commodity...âseparateâ Customers of Sipc Members § 300.105 Joint accounts. (a) A joint account shall be deemed to be a “qualifying...

2012-04-01

310

29 CFR 570.115 - Joint applicability.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Joint applicability. 570.115 Section 570...Labor Standards Act of 1938, as Amended Joint and Separate Applicability of Sections 12(a) and 12(c) § 570.115 Joint applicability. The child labor...

2012-07-01

311

49 CFR 192.233 - Miter joints.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 2010-10-01 false Miter joints. 192.233 Section 192.233 Transportation...Welding of Steel in Pipelines § 192.233 Miter joints. (a) A miter joint on steel pipe to be operated at a pressure...

2010-10-01

312

Joint Invariant Signatures Peter J. Olver  

E-print Network

Joint Invariant Signatures Peter J. Olver School of Mathematics University of Minnesota Minneapolis­Carlo Rota Abstract. A new, algorithmic theory of moving frames is applied to classify joint invariants and joint differential invariants of transformation groups. Equivalence and sym- metry properties

Olver, Peter

313

Joint Structures Determined by Clustering Microearthquakes  

E-print Network

Joint Structures Determined by Clustering Microearthquakes Using Waveform Amplitude Ratios Adam Sciences and Geomechanics Abstracts Roff et al., Joint Structures (Running header) #12;2 Abstract A new of microearthquakes induced by the pressurization of a 3.5-km deep, jointed region of granitic rock. The relative

314

29 CFR 570.115 - Joint applicability.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Joint applicability. 570.115 Section 570...Labor Standards Act of 1938, as Amended Joint and Separate Applicability of Sections 12(a) and 12(c) § 570.115 Joint applicability. The child labor...

2013-07-01

315

21 CFR 26.73 - Joint Committee.  

Code of Federal Regulations, 2011 CFR

...Drugs 1 2011-04-01 2011-04-01 false Joint Committee. 26.73 Section 26.73 Food and...COMMUNITY âFrameworkâ Provisions § 26.73 Joint Committee. (a) A Joint Committee consisting of representatives of...

2011-04-01

316

17 CFR 300.105 - Joint accounts.  

Code of Federal Regulations, 2013 CFR

...Exchanges 3 2013-04-01 2013-04-01 false Joint accounts. 300.105 Section 300.105 Commodity...âseparateâ Customers of Sipc Members § 300.105 Joint accounts. (a) A joint account shall be deemed to be a “qualifying...

2013-04-01

317

7 CFR 1956.110 - Joint debtors.  

...2014-01-01 2014-01-01 false Joint debtors. 1956.110 Section 1956.110...Settlement-Community and Business Programs § 1956.110 Joint debtors. Settlements may not be approved for one joint debtor unless approved for all...

2014-01-01

318

7 CFR 1956.110 - Joint debtors.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Joint debtors. 1956.110 Section 1956.110...Settlement-Community and Business Programs § 1956.110 Joint debtors. Settlements may not be approved for one joint debtor unless approved for all...

2013-01-01

319

32 CFR 536.54 - Joint tortfeasors.  

Code of Federal Regulations, 2012 CFR

...Defense 3 2012-07-01 2009-07-01 true Joint tortfeasors. 536.54 Section 536.54 National...Investigation and Processing of Claims § 536.54 Joint tortfeasors. When joint tortfeasors are liable, it is DA policy to...

2012-07-01

320

29 CFR 570.115 - Joint applicability.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Joint applicability. 570.115 Section 570...Labor Standards Act of 1938, as Amended Joint and Separate Applicability of Sections 12(a) and 12(c) § 570.115 Joint applicability. The child labor...

2010-07-01

321

Joint Kernel Learning for Supervised Image Segmentation  

E-print Network

Joint Kernel Learning for Supervised Image Segmentation Jongmin Kim, Youngjoo Seo, Sanghyuk Park al- gorithm based on joint-kernelized structured prediction. In the proposed algorithm, correlation for struc- tured prediction were generally chosen to be linear with the model pa- rameter and joint feature

Yoo, Chang D.

322

32 CFR 536.54 - Joint tortfeasors.  

...Defense 3 2014-07-01 2014-07-01 false Joint tortfeasors. 536.54 Section 536.54 National...Investigation and Processing of Claims § 536.54 Joint tortfeasors. When joint tortfeasors are liable, it is DA policy to...

2014-07-01

323

17 CFR 300.105 - Joint accounts.  

...Exchanges 4 2014-04-01 2014-04-01 false Joint accounts. 300.105 Section 300.105 Commodity...âseparateâ Customers of Sipc Members § 300.105 Joint accounts. (a) A joint account shall be deemed to be a “qualifying...

2014-04-01

324

JOINT DEGREE PROGRAMS DEFINITION AND POLICY  

E-print Network

1 JOINT DEGREE PROGRAMS DEFINITION AND POLICY: Within the fields of medicine and law, dual training for such complementary training can be demonstrated, the creation of a formal "Joint" degree program in which students or MD) offered at Penn State may be warranted. Such Joint degree programs enhance the educational

Omiecinski, Curtis

325

17 CFR 300.105 - Joint accounts.  

Code of Federal Regulations, 2010 CFR

...Exchanges 3 2010-04-01 2010-04-01 false Joint accounts. 300.105 Section 300.105 Commodity...âseparateâ Customers of Sipc Members § 300.105 Joint accounts. (a) A joint account shall be deemed to be a “qualifying...

2010-04-01

326

49 CFR 192.233 - Miter joints.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 2011-10-01 false Miter joints. 192.233 Section 192.233 Transportation...Welding of Steel in Pipelines § 192.233 Miter joints. (a) A miter joint on steel pipe to be operated at a pressure...

2011-10-01

327

7 CFR 1956.110 - Joint debtors.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Joint debtors. 1956.110 Section 1956.110...Settlement-Community and Business Programs § 1956.110 Joint debtors. Settlements may not be approved for one joint debtor unless approved for all...

2012-01-01

328

32 CFR 536.54 - Joint tortfeasors.  

Code of Federal Regulations, 2013 CFR

...Defense 3 2013-07-01 2013-07-01 false Joint tortfeasors. 536.54 Section 536.54 National...Investigation and Processing of Claims § 536.54 Joint tortfeasors. When joint tortfeasors are liable, it is DA policy to...

2013-07-01

329

Joint News Release ELEVENTH ITER NEGOTIATIONS MEETING  

E-print Network

Joint News Release ELEVENTH ITER NEGOTIATIONS MEETING CHENGDU , CHINA, 24OCTOBER 2005 Delegations of America met in CHENGDU on 24October 2005 to continue their work to reach agreement on the joint the project and its procurements, and the continuing joint drafting of the agreement on establishing

330

21 CFR 26.73 - Joint Committee.  

Code of Federal Regulations, 2013 CFR

...Drugs 1 2013-04-01 2013-04-01 false Joint Committee. 26.73 Section 26.73 Food and...COMMUNITY âFrameworkâ Provisions § 26.73 Joint Committee. (a) A Joint Committee consisting of representatives of...

2013-04-01

331

17 CFR 300.105 - Joint accounts.  

Code of Federal Regulations, 2011 CFR

...Exchanges 3 2011-04-01 2011-04-01 false Joint accounts. 300.105 Section 300.105 Commodity...âseparateâ Customers of Sipc Members § 300.105 Joint accounts. (a) A joint account shall be deemed to be a “qualifying...

2011-04-01

332

21 CFR 26.73 - Joint Committee.  

...Drugs 1 2014-04-01 2014-04-01 false Joint Committee. 26.73 Section 26.73 Food and...COMMUNITY âFrameworkâ Provisions § 26.73 Joint Committee. (a) A Joint Committee consisting of representatives of...

2014-04-01

333

29 CFR 570.115 - Joint applicability.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Joint applicability. 570.115 Section 570...Labor Standards Act of 1938, as Amended Joint and Separate Applicability of Sections 12(a) and 12(c) § 570.115 Joint applicability. The child labor...

2011-07-01

334

Radiofrequency sacroiliac joint denervation for sacroiliac syndrome  

Microsoft Academic Search

Background and Objectives: Radiofrequency (RF) denervation of the sacroiliac (SI) joint has been advocated for the treatment of sacroiliac syndrome, yet no clinical studies or case series support its use. Methods: We report the results of a consecutive series of 50 SI joint RF denervations performed in 33 patients with sacroiliac syndrome. All patients underwent diagnostic SI joint injections with

F. Michael Ferrante; Lawrence F. King; Elizabeth A. Roche; Philip S. Kim; Margaret Aranda; Leslie R. DeLaney; Issam A. Mardini; Andrew J. Mannes

2001-01-01

335

Distributed Compressed Sensing of Jointly Sparse Signals  

E-print Network

a second new model for jointly sparse signals that allows for joint recovery of multi- ple signals from-of-the-art compression algorithms employ a decorrelating transform such as an exact or approximate KarhunenDistributed Compressed Sensing of Jointly Sparse Signals Marco F. Duarte, Shriram Sarvotham, Dror

336

Joints in deployable space truss structures  

NASA Technical Reports Server (NTRS)

Since the response of deployable structural concepts being considered for the Large Deployable Reflector (LDR) backup structure will be dominated by the response of joints, the joint characteristics are significant. An overview is given of the research activities at LaRC on the static behavior of joints for deployable space truss structures. Since a pin-clevis-type joint will be utilized in deployable structures, an experimental research program to characterize the joint parameters which affect stiffness was conducted. An experimental research program was conducted on a second type of joint, referred to as a near-center latch joint. It was used in the center of members on the deployable truss structure for the Control of Flexible Structures (COFS) flight experiment. The test results of the near-center latch joint and the member with the joints indicated that the stiffness of the near-center joint is linear and stiffer than the stiffness of the total member, and that non-linearities in the stiffness characteristics of the total member were due to bending introduced at the ends of the member. The resulting data indicates that stiff linear folding joints can be designed and that bending load paths should be avoided whenever possible. In summary, for deployable structures, special attention to the joint and the structure design is required to minimize the undesirable structural non-linearities.

Rhodes, M.

1988-01-01

337

Effects of joints in truss structures  

NASA Technical Reports Server (NTRS)

The response of truss-type structures for future space applications, such as Large Deployable Reflector (LDR), will be directly affected by joint performance. Some of the objectives of research at BAC were to characterize structural joints, establish analytical approaches that incorporate joint characteristics, and experimentally establish the validity of the analytical approaches. The test approach to characterize joints for both erectable and deployable-type structures was based upon a Force State Mapping Technique. The approach pictorially shows how the nonlinear joint results can be used for equivalent linear analysis. Testing of the Space Station joints developed at LaRC (a hinged joint at 2 Hz and a clevis joint at 2 Hz) successfully revealed the nonlinear characteristics of the joints. The Space Station joints were effectively linear when loaded to plus or minus 500 pounds with a corresponding displacement of about plus or minus 0.0015 inch. It was indicated that good linear joints exist which are compatible with errected structures, but that difficulty may be encountered if nonlinear-type joints are incorporated in the structure.

Ikegami, R.

1988-01-01

338

Navigating Joint Projects in Telephone Conversations  

ERIC Educational Resources Information Center

Conversation coordinates joint activities and the joint projects that compose them. Participants coordinate (1) vertical transitions on entering and exiting joint projects; and (2) horizontal transitions in continuing within them. Transitions are coordinated using project markers such as uh-huh, yeah, right, and okay. In the authors' proposal,…

Bangerter, Adrian; Clark, Herbert H.; Katz, Anna R.

2004-01-01

339

Irish National Joint Registry: a concept  

Microsoft Academic Search

Despite the well-documented benefits, some countries have yet to agree on the establishment of a national joint register. A questionnaire study was under- taken to ascertain the opinions of the consultant orthopaedic surgeons and specialist registrars, regarding establishment of an Irish National Joint Register. The aim was to find out the possible reasons why a national joint register has not

K. O. Oduwole; M. B. Codd; F. Byrne; J. O’Byrne; P. J. Kenny

2008-01-01

340

49 CFR 234.233 - Rail joints.  

Code of Federal Regulations, 2013 CFR

... 4 2013-10-01 2013-10-01 false Rail joints. 234.233 Section 234.233 Transportation...Testing Maintenance Standards § 234.233 Rail joints. Each non-insulated rail joint located within the limits of a...

2013-10-01

341

49 CFR 234.233 - Rail joints.  

Code of Federal Regulations, 2010 CFR

... 4 2010-10-01 2010-10-01 false Rail joints. 234.233 Section 234.233 Transportation...Testing Maintenance Standards § 234.233 Rail joints. Each non-insulated rail joint located within the limits of a...

2010-10-01

342

49 CFR 234.233 - Rail joints.  

Code of Federal Regulations, 2011 CFR

... 4 2011-10-01 2011-10-01 false Rail joints. 234.233 Section 234.233 Transportation...Testing Maintenance Standards § 234.233 Rail joints. Each non-insulated rail joint located within the limits of a...

2011-10-01

343

Future joint warfare analysis model designs  

Microsoft Academic Search

The Joint Warfare System (JWARS) is a state-of-the-art simulation of joint warfare for analysis, to be developed as one component of the Joint Analytic Model Improvement Program recently approved by the Deputy Secretary of Defense. This paper describes the rationale, objectives, management, approach and status of JWARS.

William G. Lese Jr.; Jim Metzger

1995-01-01

344

Future joint warfare analysis model designs  

Microsoft Academic Search

The Joint Warfare System (JWARS) is a state-of-the-art simulation of joint warfare for analysis, to be developed as one component of the Joint Analytic Model Improvement Program recently approved by the Deputy Secretary of Defense. This paper describes the rationale, objectives, management, approach and status of JWARS

J. Metzger

1995-01-01

345

26 CFR 1.6015-1 - Relief from joint and several liability on a joint return.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 2012-04-01 false Relief from joint and several liability on a joint return. 1.6015-1 Section 1.6015-1...Returns Or Statements § 1.6015-1 Relief from joint and several liability on a joint return....

2012-04-01

346

26 CFR 1.6015-1 - Relief from joint and several liability on a joint return.  

...2014-04-01 2014-04-01 false Relief from joint and several liability on a joint return. 1.6015-1 Section 1.6015-1...Returns Or Statements § 1.6015-1 Relief from joint and several liability on a joint return....

2014-04-01

347

26 CFR 1.6015-1 - Relief from joint and several liability on a joint return.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Relief from joint and several liability on a joint return. 1.6015-1 Section 1.6015-1...Returns Or Statements § 1.6015-1 Relief from joint and several liability on a joint return....

2013-04-01

348

Joint interaction with embedded concretions: joint loading congurations inferred from propagation paths  

E-print Network

Joint interaction with embedded concretions: joint loading con®gurations inferred from propagation The interaction between propagating joints and embedded concretions in a Devonian black shale near Seneca Lake, NY, permits identi®cation of the loading con®gurations responsible for two joint sets of dierent ages striking

Engelder, Terry

349

26 CFR 1.6015-1 - Relief from joint and several liability on a joint return.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 2011-04-01 false Relief from joint and several liability on a joint return. 1.6015-1 Section 1.6015-1...Returns Or Statements § 1.6015-1 Relief from joint and several liability on a joint return....

2011-04-01

350

Proximal Tibiofibular Joint Ganglion CystsExcision, Recurrence, and Joint Arthrodesis  

Microsoft Academic Search

Objective: Proximal tibiofibular joint proximal tibiofibular joint cysts are rare entities that can cause disability. Excision remains the traditional surgical treatment. Cyst recurrence has been a problem. This study reviews one of the largest series of patients with proximal tibiofibular joint cysts and evaluates the role of a new surgical option, proximal tibiofibular joint fusion.Methods: Thirteen patients were admitted to

Shana Miskovsky; Christopher Kaeding; Lawrence Weis

2004-01-01

351

Joint interaction with embedded concretions: joint loading configurations inferred from propagation paths  

Microsoft Academic Search

The interaction between propagating joints and embedded concretions in a Devonian black shale near Seneca Lake, NY, permits identification of the loading configurations responsible for two joint sets of different ages striking at nearly the same orientation. The earlier set consists of systematic joints cut by later Alleghanian joints of the Appalachian Plateau. The later set consists of non-systematic curving

David T. McConaughy; Terry Engelder

1999-01-01

352

Analytical and experimental methods for adhesively bonded joints subjected to high temperatures  

NASA Astrophysics Data System (ADS)

Recent advances in material systems have expanded the temperature range over which adhesively bonded composite joints can be used. In this work, several tools are developed for use in modeling joints over a broad range of temperatures. First, a set of dimensionless parameters is established which can be used for analysis of joint performance for an orthotropic symmetric double lap joint. A critical dimensionless ratio of mechanical and thermal loads is identified. The ratio predicts characteristics of the resulting stress distribution. A bonded joint finite element is also developed, wherein a joint-specific finite element is formulated based on an analytical solution. The resulting element allows for mesh-independent joint evaluation and multi-joint simulation at a system or vehicle level. As a mid-level analysis technique, the element has significant predictive and cost advantages over the previously available methods. An advanced analysis technique, the discrete cohesive zone method, is developed and demonstrated in a general element formulation. Initially, the element is examined from the perspective of computational efficiency and robustness. Two efficient traction laws are formulated and are compared to a traction law that is in common use. The element is subsequently used to investigate the interactions of adhesive parameters in standard adhesive characterization experiments. This quantification of experimental sensitivities allows for a deliberate mapping of cumulative experimental results to an appropriate set of model constitutive parameters. With knowledge of the parameter interactions, a set of experimental results are interpreted to determine a set of adhesive constitutive parameters for T650/AFR-PE-4/FM680-1, a high temperature material system of current interest.

Gustafson, Peter A.

2008-10-01

353

Traction-drive force transmission for telerobotic joints  

NASA Technical Reports Server (NTRS)

A mechanism which meets the requirements of a teleoperated manipulator and those of an autonomous robot is discussed. The mechanism is a traction-drive differential that uses variable preload mechanisms. The differential provides compact design, with dextrous motion range and torque density similar to geared systems. The traction drive offers high stiffness to backlash for good robotic performance. The variable-loading mechanism (VLM) minimizes the drive-train friction for improved teleoperation. This combination provides a mechanism to allow advanced manipulation with either teleoperated control or autonomous robotic operation. The design principles of both major components of the joint mechanism are described.

Williams, D. M.; Kuban, D. P.

1989-01-01

354

Seismic response of rock joints and jointed rock mass  

SciTech Connect

Long-term stability of emplacement drifts and potential near-field fluid flow resulting from coupled effects are among the concerns for safe disposal of high-level nuclear waste (HLW). A number of factors can induce drift instability or change the near-field flow patterns. Repetitive seismic loads from earthquakes and thermal loads generated by the decay of emplaced waste are two significant factors. One of two key technical uncertainties (KTU) that can potentially pose a high risk of noncompliance with the performance objectives of 10 CFR Part 60 is the prediction of thermal-mechanical (including repetitive seismic load) effects on stability of emplacement drifts and the engineered barrier system. The second KTU of concern is the prediction of thermal-mechanical-hydrological (including repetitive seismic load) effects on the host rock surrounding the engineered barrier system. The Rock Mechanics research project being conducted at the Center for Nuclear Waste Regulatory Analyses (CNWRA) is intended to address certain specific technical issues associated with these two KTUs. This research project has two major components: (i) seismic response of rock joints and a jointed rock mass and (ii) coupled thermal-mechanical-hydrological (TMH) response of a jointed rock mass surrounding the engineered barrier system (EBS). This final report summarizes the research activities concerned with the repetitive seismic load aspect of both these KTUs.

Ghosh, A.; Hsiung, S.M.; Chowdhury, A.H. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

1996-06-01

355

44 CFR 150.5 - Joint Public Safety Awards Board.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 2011-10-01 false Joint Public Safety Awards Board. 150.5 Section...AWARDS TO PUBLIC SAFETY OFFICERS § 150.5 Joint Public Safety Awards Board. (a) A Joint Public Safety Awards Board (Joint...

2011-10-01

356

44 CFR 150.5 - Joint Public Safety Awards Board.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 2013-10-01 false Joint Public Safety Awards Board. 150.5 Section...AWARDS TO PUBLIC SAFETY OFFICERS § 150.5 Joint Public Safety Awards Board. (a) A Joint Public Safety Awards Board (Joint...

2013-10-01

357

JOINT ATTENTION IN HUMANS AND ANIMALS Malinda Carpenter  

E-print Network

JOINT ATTENTION IN HUMANS AND ANIMALS Malinda Carpenter Max Planck Institute for Evolutionary of learning. Springer. Synonyms Coordinated Joint Engagement; Declarative Pointing; Declarative Showing; Triadic Looking; Referential Looking; Joint Visual Attention Definition Joint attention is typically

Carpenter, M.alinda

358

Subject-specific analysis of joint contact mechanics: application to the study of osteoarthritis and surgical planning.  

PubMed

Advances in computational mechanics, constitutive modeling, and techniques for subject-specific modeling have opened the door to patient-specific simulation of the relationships between joint mechanics and osteoarthritis (OA), as well as patient-specific preoperative planning. This article reviews the application of computational biomechanics to the simulation of joint contact mechanics as relevant to the study of OA. This review begins with background regarding OA and the mechanical causes of OA in the context of simulations of joint mechanics. The broad range of technical considerations in creating validated subject-specific whole joint models is discussed. The types of computational models available for the study of joint mechanics are reviewed. The types of constitutive models that are available for articular cartilage are reviewed, with special attention to choosing an appropriate constitutive model for the application at hand. Issues related to model generation are discussed, including acquisition of model geometry from volumetric image data and specific considerations for acquisition of computed tomography and magnetic resonance imaging data. Approaches to model validation are reviewed. The areas of parametric analysis, factorial design, and probabilistic analysis are reviewed in the context of simulations of joint contact mechanics. Following the review of technical considerations, the article details insights that have been obtained from computational models of joint mechanics for normal joints; patient populations; the study of specific aspects of joint mechanics relevant to OA, such as congruency and instability; and preoperative planning. Finally, future directions for research and application are summarized. PMID:23445048

Henak, Corinne R; Anderson, Andrew E; Weiss, Jeffrey A

2013-02-01

359

Ultrasonic Probing Of Complexly Shaped Joints  

NASA Technical Reports Server (NTRS)

Technique developed involves use of ultrasonics to inspect first bond surfaces of solid-rocket-motor joints. By fitting pieces of insulating materials to mate exactly with complicated shapes of affected parts of insulation, complicated shapes redefined into simpler ones probed more easily. When technique used to insonify from insulation side, one readily detects difference between disbond and good bond. Same technique applied to field tang joints, field clevis joints, and aft-dome-to-fixed-nozzle-housing attachment points. Although developed for inspecting joints in solid rocket motors, also applicable to nondestructive evaluation of other complicated joints.

Madaras, Eric I.

1993-01-01

360

Analysis of NSTX TF Joint Voltage Measurements  

SciTech Connect

This report presents findings of analyses of recorded current and voltage data associated with 72 electrical joints operating at high current and high mechanical stress. The analysis goal was to characterize the mechanical behavior of each joint and thus evaluate its mechanical supports. The joints are part of the toroidal field (TF) magnet system of the National Spherical Torus Experiment (NSTX) pulsed plasma device operating at the Princeton Plasma Physics Laboratory (PPPL). Since there is not sufficient space near the joints for much traditional mechanical instrumentation, small voltage probes were installed on each joint and their voltage monitoring waveforms have been recorded on sampling digitizers during each NSTX ''shot''.

Woolley R

2005-10-07

361

Sonography of the knee joint?  

PubMed Central

The aim of this article is to review the sonographic appearances of common disorders involving the knee joint. Ultrasound is a sensitive method for diagnosis of tendon injuries. Injured ligaments appear swollen with mixed echogenicity. Meniscal injuries and muscle tears can be easily diagnosed. Ultrasound shows synovial thickening and effusion in inflammatory arthropathy and erosions of the articular surface in degenerative arthritis. It can be used effectively in the detection of rheumatoid arthritic activity and for grading degenerative arthritis lesions. Cystic lesions, as well as benign and malignant soft-tissue masses, are clearly delineated. Ultrasound is a safe noninvasive imaging modality that can be used for diagnosis of different disorders involving the knee joint. PMID:23397073

Razek, A.A.K.A.; Fouda, N.S.; Elmetwaley, N.; Elbogdady, E.

2009-01-01

362

Ultrasonic Welding of Hybrid Joints  

NASA Astrophysics Data System (ADS)

A central research field of the Institute of Materials Science and Engineering at the University of Kaiserslautern (WKK), Germany, is the realization of innovative hybrid joints by ultrasonic metal welding. This article gives an overview of suitable ultrasonic welding systems as well as of essential machine and material parameters, which influence the quality of the welds. Besides the ultrasonic welding of dissimilar metals such as Al to Cu or Al to steels, the welds between newly developed materials like aluminum foam sandwiches or flat flexible cables also can be realized. Moreover, the joining of glass and ceramic to sheet metals is a point of interest at the WKK. By using the ultrasonic metal welding process, it is possible to realize metal/glass welds with tensile shear strengths of 50 MPa. For metal/ceramic joints, the shear strengths values up to 150 MPa were measured. Finally, selected results about the occurring bonding mechanisms will be discussed.

Wagner, Guntram; Balle, Frank; Eifler, Dietmar

2012-03-01

363

Warfighter decision making performance analysis as an investment priority driver  

NASA Astrophysics Data System (ADS)

Estimating the relative value of alternative tactics, techniques and procedures (TTP) and information systems requires measures of the costs and benefits of each, and methods for combining and comparing those measures. The NATO Code of Best Practice for Command and Control Assessment explains that decision making quality would ideally be best assessed on outcomes. Lessons learned in practice can be assessed statistically to support this, but experimentation with alternate measures in live conflict is undesirable. To this end, the development of practical experimentation to parameterize effective constructive simulation and analytic modelling for system utility prediction is desirable. The Land Battlespace Systems Department of Dstl has modeled human development of situational awareness to support constructive simulation by empirically discovering how evidence is weighed according to circumstance, personality, training and briefing. The human decision maker (DM) provides the backbone of the information processing activity associated with military engagements because of inherent uncertainty associated with combat operations. To develop methods for representing the process in order to assess equipment and non-technological interventions such as training and TTPs we are developing componentized or modularized timed analytic stochastic model components and instruments as part of a framework to support quantitative assessment of intelligence production and consumption methods in a human decision maker-centric mission space. In this paper, we formulate an abstraction of the human intelligence fusion process from the Defence Science and Technology Laboratory's (Dstl's) INCIDER model to include in our framework, and synthesize relevant cost and benefit characteristics.

Thornley, David J.; Dean, David F.; Kirk, James C.

2010-04-01

364

Nuclear war-fighting strategy for the United States  

SciTech Connect

This dissertation concerns a strategy for fighting and winning a nuclear war. Despite the conventional wisdom that nuclear war is suicidal and occurs only as a result of irrationality, this study analyzes nuclear war as a rational policy option. It is necessary to suggest the radical proposition that nuclear war, like traditional military campaigns, is a political action. Thus, nuclear war can be in the national interest. Further, the countervalue strategy of Mutually Assured Destruction is questioned because city destruction serves no conceivable political or military objective.

Martel, W.C.

1981-01-01

365

Jointly Sponsored Research Program. Final report  

SciTech Connect

The Jointly Sponsored Research Program (JSRP) is a US Department of Energy (DOE) program funded through the Office of Fossil Energy and administered at the Morgantown Energy Technology Center. Under this program, which has been in place since Fiscal Year 1990, DOE makes approximately $2.5 million available each year to the Energy and Environmental Research Center (EERC) to fund projects that are of current interest to industry but which still involve significant risk, thus requiring some government contribution to offset the risk if the research is to move forward. The program guidelines require that at least 50% of the project funds originate from nonfederal sources. Projects funded under the JSRP often originate under a complementary base program, which funds higher-risk projects. The projects funded in Fiscal Year 1996 addressed a wide range of Fossil Energy interests, including hot-gas filters for advanced power systems; development of cleaner, more efficient processing technologies; development of environmental control technologies; development of environmental remediation and reuse technologies; development of improved analytical techniques; and development of a beneficiation technique to broaden the use of high-sulfur coal. Descriptions and status for each of the projects funded during the past fiscal year are included in Section A of this document, Statement of Technical Progress.

NONE

1997-07-01

366

Spring joint with overstrain sensor  

NASA Technical Reports Server (NTRS)

A flexible joint may include a conductive compression spring and a pair of non-conductive spring cages disposed at opposite ends of the compression spring to support the compression spring. A conductive member disposed inside the compression spring may extend between the pair of spring cages. One end of the conductive member may be fixed for movement with one of the spring cages and another end of the conductive member may be fixed for movement with the other of the spring cages.

Phelps, Peter M. (Inventor); Gaither, Bryan W. (Inventor)

2011-01-01

367

Metal-ceramic joint assembly  

DOEpatents

A metal-ceramic joint assembly in which a brazing alloy is situated between metallic and ceramic members. The metallic member is either an aluminum-containing stainless steel, a high chromium-content ferritic stainless steel or an iron nickel alloy with a corrosion protection coating. The brazing alloy, in turn, is either an Au-based or Ni-based alloy with a brazing temperature in the range of 9500 to 1200.degree. C.

Li, Jian (New Milford, CT)

2002-01-01

368

Fellows Celebrated at Joint Assembly  

NASA Astrophysics Data System (ADS)

The 2008 AGU Fellows were presented at the recent Joint Assembly in Fort Lauderdale, Fla. A formal ceremony was held on 29 May 2008, during which President Tim Killeen introduced each Fellow and read a brief statement of the achievements for which each had been selected. The presentations were followed by a reception for meeting attendees and a banquet at which family members and close colleagues further feted the honorees.

2008-07-01

369

Knee joint due in children  

Microsoft Academic Search

Summary  \\u000a Although children are injured everyday through accidents, road traffic, leisure or sports activities, internal lesions of\\u000a the knee joint due to the trauma are rare. Diagnose and therapy follow rather empirical than analytical patterns. A retrospective,\\u000a controlled study evaluates and recommends ways of treatment. Traumatic internal lesions of the knee where analysed in 76 children\\u000a up to age 16.

S. Arndt; L. Besch; D. Havemann

1999-01-01

370

Space Suit Joint Torque Testing  

NASA Technical Reports Server (NTRS)

In 2009 and early 2010, a test was performed to quantify the torque required to manipulate joints in several existing operational and prototype space suits in an effort to develop joint torque requirements appropriate for a new Constellation Program space suit system. The same test method was levied on the Constellation space suit contractors to verify that their suit design meets the requirements. However, because the original test was set up and conducted by a single test operator there was some question as to whether this method was repeatable enough to be considered a standard verification method for Constellation or other future space suits. In order to validate the method itself, a representative subset of the previous test was repeated, using the same information that would be available to space suit contractors, but set up and conducted by someone not familiar with the previous test. The resultant data was compared using graphical and statistical analysis and a variance in torque values for some of the tested joints was apparent. Potential variables that could have affected the data were identified and re-testing was conducted in an attempt to eliminate these variables. The results of the retest will be used to determine if further testing and modification is necessary before the method can be validated.

Valish, Dana J.

2011-01-01

371

Mechanical flexible joint design document  

NASA Technical Reports Server (NTRS)

The purpose of this report is to document the status of the Mechanical Flexible Joint (MFJ) Design Subtask with the intent of halting work on the design. Recommendations for future work is included in the case that the task is to be resumed. The MFJ is designed to eliminate two failure points from the current flex joint configuration, the inner 'tripod configuration' and the outer containment jacket. The MFJ will also be designed to flex 13.5 degrees and have three degrees of freedom. By having three degrees of freedom, the MFJ will allow the Low Pressure Fuel Duct to twist and remove the necessity to angulate the full 11 degrees currently required. The current flex joints are very labor intensive and very costly and a simple alternative is being sought. The MFJ is designed with a greater angular displacement, with three degrees of freedom, to reside in the same overall envelope, to meet weight constraints of the current bellows, to be compatible with cryogenic fuel and oxidizers, and also to be man-rated.

Daily, Vic

1993-01-01

372

Temporomandibular joint diagnostics using CBCT.  

PubMed

The present review will give an update on temporomandibular joint (TMJ) imaging using CBCT. It will focus on diagnostic accuracy and the value of CBCT compared with other imaging modalities for the evaluation of TMJs in different categories of patients; osteoarthritis (OA), juvenile OA, rheumatoid arthritis and related joint diseases, juvenile idiopathic arthritis and other intra-articular conditions. Finally, sections on other aspects of CBCT research related to the TMJ, clinical decision-making and concluding remarks are added. CBCT has emerged as a cost- and dose-effective imaging modality for the diagnostic assessment of a variety of TMJ conditions. The imaging modality has been found to be superior to conventional radiographical examinations as well as MRI in assessment of the TMJ. However, it should be emphasized that the diagnostic information obtained is limited to the morphology of the osseous joint components, cortical bone integrity and subcortical bone destruction/production. For evaluation of soft-tissue abnormalities, MRI is mandatory. There is an obvious need for research on the impact of CBCT examinations on patient outcome. PMID:25369205

Larheim, T A; Abrahamsson, A-K; Kristensen, M; Arvidsson, L Z

2015-01-01

373

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the second quarterly progress report for Year 3 of the ACTS project. It includes a review of progress made in: (1) Flow Loop development and (2) research tasks during the period of time between Oct 1, 2001 and Dec. 31, 2001. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 3: Addition of a Cuttings Injection/Collection System), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (c) Research project (Task 9): ''Study of Foam Flow Behavior Under EPET Conditions'', (d) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (e) Research on instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), and Foam properties while transporting cuttings. (Task 12), (f) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S). (g) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Affonso Lourenco; Evren Ozbayoglu; Lei Zhou

2002-01-30

374

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the fourth quarterly progress report for Year-3 of the ACTS Project. It includes a review of progress made in: (1) Flow Loop construction and development and (2) research tasks during the period of time between April 1, 2002 and June 30, 2002. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 3: Addition of a Cuttings Injection/Separation System), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)''; (c) Research project (Task 9b): ''Study of Foam Flow Behavior Under EPET Conditions''; (d) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions''; (e) Research on three instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), Foam texture while transporting cuttings. (Task 12), and Viscosity of Foam under EPET (Task 9b); (f) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S); (g) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Mark Pickell; Len Volk; Mike Volk; Evren Ozbayoglu; Lei Zhou

2002-07-30

375

Advanced LIGO  

E-print Network

The Advanced LIGO gravitational wave detectors are second generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA. The two instruments are identical in design, and are specialized versions of a Michelson interferometer with 4 km long arms. As in initial LIGO, Fabry-Perot cavities are used in the arms to increase the interaction time with a gravitational wave, and power recycling is used to increase the effective laser power. Signal recycling has been added in Advanced LIGO to improve the frequency response. In the most sensitive frequency region around 100 Hz, the design strain sensitivity is a factor of 10 better than initial LIGO. In addition, the low frequency end of the sensitivity band is moved from 40 Hz down to 10 Hz. All interferometer components have been replaced with improved technologies to achieve this sensitivity gain. Much better seismic isolation and test mass suspensions are responsible for the gains at lower frequencies. Higher laser power, larger test masses and improved mirror coatings lead to the improved sensitivity at mid- and high- frequencies. Data collecting runs with these new instruments are planned to begin in mid-2015.

The LIGO Scientific Collaboration

2014-11-17

376

Columnar Jointing Thermo-Mechanics  

NASA Astrophysics Data System (ADS)

Thermo-mechanical effects, common to a wide range of geological phenomena, are integral to the formation of columnar joints during cooling and crystallisation of lava flows. The process, and resultant geometry, relies on a complex inter-play between heat distribution, contraction and tensile strength, yet the kinetics of their formation remains elusive. Results are presented from a combination of field survey, thermo-analytical characterisation and mechanical investigation to constrain conditions favourable for columnar jointing. Columnar joints from Seljavallir, Iceland, produce quadratic to heptagonal cross sectional patterns with column widths ranging from 20 to 70 cm in size. The fracture surfaces are characterised by striae of which spacing (between 1 to 6 cm) appear to share a positive linear relationship to the joint spacing. The striae exhibit both a smooth and rough portion, interpreted to express a change in deformation regime from fully brittle, mode-I fracture propagation to an increasingly ductile response of the lava with tensile fracture dissipation as the fracture event wanes. The contraction of the basalts has been investigated via the expansion coefficient determined in a dilatometer (at 3mN of normal stress and a rate of 2 °C/min). The expansion coefficient has been constrained to 10-5/°C and the onset of melting (and completion of natural crystallisation) at 1150°C. Experiments are currently being conducted to assess the effect of cooling rate and normal stress on the properties of the Seljavallir basalts. The mechanical properties of the rock in tension have been tested at room temperature in a uniaxial press (high-temperature tests are also scheduled). During true-tension pull test at a strain rate of 10-4 s-1, elastic deformation agrees to a Young's modulus of 6.3 GPa. Tensile failure initiated after 0.35% strain with the generation of a large crack at a peak stress of 2.2 MPa. The fracture induced a stress drop and upon stress build-up to 0.6 MPa a series of small fractures ensued. We interpret this two-stage fracture dynamics as the cause for the change in fracture surface observed in nature. A combined thermo-mechanical model is presented to constrain the onset temperature and dynamics of columnar jointing.

Iddon, Fiona; Hornby, Adrian; Kendrick, Jackie; Wadsworth, Fabian; von Aulock, Felix; Lavallée, Yan

2014-05-01

377

Generalized joint laxity and multidirectional instability of the shoulder  

PubMed Central

Generalized joint laxity and shoulder instability are common conditions that exhibit a wide spectrum of different clinical forms and may coexist in the same patient. Generalized joint laxity can be congenital or acquired. It is fundamental to distinguish laxity from instability. Laxity is a physiological condition that may predispose to the development of shoulder instability. A high prevalence of generalized joint laxity has been identified in patients with multidirectional instability of the shoulder. Multidirectional instability is defined as symptomatic instability in two or more directions. The diagnosis and treatment of this condition are still challenging because of complexities in its classification and etiology. These complexities are compounded when multidirectional instability and laxity exist in the same patient. With an improved understanding of the clinical symptoms and physical examination findings, a successful strategy for conservative and/or surgical treatments can be developed. Conservative treatment is the first-line option. If it fails, different surgical options are available. Historically, open capsular shift has been considered the gold standard in the surgical management of these patients. Nowadays, advanced arthroscopic techniques offer several advantages over traditional open approaches and have shown similar outcomes. The correct approach to the management of failed stabilization procedures has not been yet defined.

SACCOMANNO, MARISTELLA F.; FODALE, MARIO; CAPASSO, LUIGI; CAZZATO, GIAMPIERO; MILANO, GIUSEPPE

2013-01-01

378

Joint reconstruction of PET-MRI by exploiting structural similarity  

NASA Astrophysics Data System (ADS)

Recent advances in technology have enabled the combination of positron emission tomography (PET) with magnetic resonance imaging (MRI). These PET-MRI scanners simultaneously acquire functional PET and anatomical or functional MRI data. As function and anatomy are not independent of one another the images to be reconstructed are likely to have shared structures. We aim to exploit this inherent structural similarity by reconstructing from both modalities in a joint reconstruction framework. The structural similarity between two modalities can be modelled in two different ways: edges are more likely to be at similar positions and/or to have similar orientations. We analyse the diffusion process generated by minimizing priors that encapsulate these different models. It turns out that the class of parallel level set priors always corresponds to anisotropic diffusion which is sometimes forward and sometimes backward diffusion. We perform numerical experiments where we jointly reconstruct from blurred Radon data with Poisson noise (PET) and under-sampled Fourier data with Gaussian noise (MRI). Our results show that both modalities benefit from each other in areas of shared edge information. The joint reconstructions have less artefacts and sharper edges compared to separate reconstructions and the ?2-error can be reduced in all of the considered cases of under-sampling.

Ehrhardt, Matthias J.; Thielemans, Kris; Pizarro, Luis; Atkinson, David; Ourselin, Sébastien; Hutton, Brian F.; Arridge, Simon R.

2015-01-01

379

Mechanical behavior study of laser welded joints for DP steel  

NASA Astrophysics Data System (ADS)

Advanced High Strength Steels (AHSS) are gaining considerable market shares in the automotive industry. The development and application of Dual Phase (DP) steel is just a consistent step towards high-strength steel grades with improved mechanical behavior. Tailor welded blanks with DP steel are promoted in the application of Body-In-White (BIW) structure by the automotive industry. A tailor welded blank consists of several flat sheets that are laser welded together before stamping. Applied cases of tailor welded blanks of high strength steels on the automotive structural parts are investigated in this paper. The mechanical behavior of laser welded joints for DP steel is studied. Microstructure of laser welded joints for DP steel was observed by SEM. Martensite in the weld seam explains the higher strength of welded joints than the base metal. Results show that the strain safety tolerance of laser welded seam for high strength steel can meet the requirement of automobile parts for stamping if the location of laser welded seam is designed reasonably.

Yan, Qi

2008-03-01

380

[Arthrodesis of the metatarsophalangeal joint of the large toe].  

PubMed

Arthrodesis of the first metatarsophalangeal joint is the procedure of choice in hallux rigidus with advanced destruction of the joint surfaces. It is also indicated after failed resection arthroplasty in hallux valgus. A dorsal skin incision is used. Flat osteotomy surfaces are created at the first metatarsal head and at the proximal phalanx with a saw. The angle between the great toe and the bottom of the foot should be ten to 15 degrees of dorsal extension. The great toe should be aligned in ten degrees of valgus relative to the first metatarsal bone, and in neutral rotation. Fixation with a dorsal one-third or one-quarter tubular plate and an interfragmentary lag screw is most stable. Interposition of a bone graft may be necessary in cases of undue shortening of the great toe, as in revision surgery following resection arthroplasty. Full weightbearing in a postoperative shoe with a rigid sole is allowed immediately postoperatively. Results with this technique are good and excellent in approximately 80 percent. The incidence of pseudarthroses is between three and 13 percent, depending on the operative technique. Symptomatic degeneration of the interphalangeal joint occurs in approximately 10 percent of patients at long-term follow-up. PMID:8692573

Wülker, N

1996-04-01

381

Prospects for joint gravitational wave and short gamma-ray burst observations  

E-print Network

We present a detailed evaluation of the expected rate of joint gravitational-wave and short gamma-ray burst (GRB) observations over the coming years. We begin by evaluating the improvement in distance sensitivity of the gravitational wave search that arises from using the GRB observation to restrict the time and sky location of the source. We argue that this gives a 25% increase in sensitivity when compared to an all-sky, all-time search, corresponding to more than doubling the number of detectable gravitational wave signals associated with GRBs. Using this, we present the expected rate of joint observations with the advanced LIGO and Virgo instruments, taking into account the expected evolution of the gravitational wave detector network. We show that in the early advanced gravitational wave detector observing runs, from 2015-2017, there is only a small chance of a joint observation. However, as the detectors approach their design sensitivities, there is a good chance of joint observations provided wide field GRB satellites, such as Fermi and the Interplanetary Network, continue operation. The rate will also depend critically upon the nature of the progenitor, with neutron star--black hole systems observable to greater distances than double neutron star systems. The relative rate of binary mergers and GRBs will depend upon the jet opening angle of GRBs. Consequently, joint observations, as well as accurate measurement of both the GRB rate and binary merger rates will allow for an improved estimation of the opening angle of GRBs.

J. Clark; H. Evans; S. Fairhurst; I. W. Harry; E. Macdonald; D. Macleod; P. J. Sutton; A. R. Williamson

2014-09-29

382

A biomechanical model for encoding joint dynamics: applications to transfemoral prosthesis control.  

PubMed

This paper presents and tests a framework for encoding joint dynamics into energy states using kinematic and kinetic knee joint sensor data and demonstrates how to use this information to predict the future energy state (torque and velocity requirements) of the joint without a priori knowledge of the activity sequence. The intended application is for enhancing micro-controlled prosthetics by making use of the embedded sensory potential of artificial limbs and classical mechanical principles of a prosthetic joint to report instantaneous energy state and most probable next energy state. When applied to the knee during preferred and fast speed walking in 8 human subjects (66 preferred-speed trials and 50 fast-speed trials), it was found that joint energy states could be consistently sequenced (75% consensus) according to mechanical energy transference conditions and subsequences appeared to reflect the stability and energy dissipation requirements of the knee during gait. When simple constraints were applied to the energy transfer input conditions (their signs), simulations indicated that it was possible to predict the future energy state with an accuracy of >80% when 2% cycle in advance (?20 ms) of the switch and >60% for 4% (?40 ms) in advance. This study justifies future research to explore whether this encoding algorithm can be used to identify submodes of other human activity that are relevant to TFP control, such as chair and stair activities and their transitions from walking, as well as unexpected perturbations. PMID:22282487

McGibbon, Chris A

2012-05-01

383

Tribology of human and artificial joints.  

PubMed

Studies of human joint lubrication mechanisms have led to the conclusion that under normal healthy conditions they are fluid film lubricated. The main features responsible for allowing this mechanism to operate are the dynamic nature of the loading and the compliance of the bearing surfaces (articular cartilage). In contrast, artificial joints, being made of much more rigid materials, have been demonstrated to be lubricated by a mixed regime, where some load is carried by the fluid film and some by solid to solid contact. Since some surface contact takes place then wear remains a problem and friction is much higher than in human joints. The use of compliant surface bearings for artificial joints has been explored and shown to be of great advantage, reproducing the effects of natural joints. However, elastomeric materials are known to degrade in aqueous solutions so this aspect has been examined to ensure a reasonable life in the human body. Joints of the lower limb--hip, knee, and ankle--have similar load and motion patterns and behave in a similar way in terms of lubrication. Joints of the hand are not in any way similar in their behaviour and so a typical upper limb joint, the finger, has been studied to see if improvements can be made to the design of replacement artificial joints. Novel suggestions like plastic on plastic joints have been shown to be an alternative which is worthy of further consideration. PMID:1823790

Unsworth, A

1991-01-01

384

Achieving integrated convoys: cargo unmanned ground vehicle development and experimentation  

NASA Astrophysics Data System (ADS)

The Cargo UGV project was initiated in 2010 with the aim of developing and experimenting with advanced autonomous vehicles capable of being integrated unobtrusively into manned logistics convoys. The intent was to validate two hypotheses in complex, operationally representative environments: first, that unmanned tactical wheeled vehicles provide a force protection advantage by creating standoff distance to warfighters during ambushes or improvised explosive device attacks; and second, that these UGVs serve as force multipliers by enabling a single operator to control multiple unmanned assets. To assess whether current state-of-the-art autonomous vehicle technology was sufficiently capable to permit resupply missions to be executed with decreased risk and reduced manpower, and to assess the effect of UGVs on customary convoy tactics, the Marine Corps Warfighting Laboratory and the Joint Ground Robotics Enterprise sponsored Oshkosh Defense and the National Robotics Engineering Center to equip two standard Marine Corps cargo trucks for autonomous operation. This paper details the system architecture, hardware implementation, and software modules developed to meet the vehicle control, perception, and planner requirements compelled by this application. Additionally, the design of a custom human machine interface and an accompanying training program are described, as is the creation of a realistic convoy simulation environment for rapid system development. Finally, results are conveyed from a warfighter experiment in which the effectiveness of the training program for novice operators was assessed, and the impact of the UGVs on convoy operations was observed in a variety of scenarios via direct comparison to a fully manned convoy.

Zych, Noah; Silver, David; Stager, David; Green, Colin; Pilarski, Thomas; Fischer, Jacob

2013-05-01

385

Project ABC: Advancement Based on Competency. Summative Evaluation.  

ERIC Educational Resources Information Center

Project ABC (Advancement Based on Competency) was a 5-year study funded jointly by the Alberta Department of Education and the Calgary Board of Education. Funded at $999,950, the program took place from 1982 to 1987. It explored alternatives to the Carnegie Unit in three senior high schools. Students, teachers, and administrators in the William…

Barrington, Gail V.; And Others

386

Bricklaying Curriculum: Advanced Bricklaying Techniques. Instructional Materials. Revised.  

ERIC Educational Resources Information Center

This curriculum guide is designed to assist bricklaying instructors in providing performance-based instruction in advanced bricklaying. Included in the first section of the guide are units on customized or architectural masonry units; glass block; sills, lintels, and copings; and control (expansion) joints. The next two units deal with cut,…

Turcotte, Raymond J.; Hendrix, Laborn J.

387

THE ACHIEVEMENT MOTIVE AND ADVANCEMENT IN TWO TYPES OF ORGANIZATIONS  

Microsoft Academic Search

DEALS WITH THE BUSINESS ORGANIZATION AS A CAUSAL LINK IN THE DEMONSTRATED ASSOCIATION BETWEEN THE LEVEL OF A NATION’S ACHIEVEMENT CONCERN AND ITS RATE OF ECONOMIC DEVELOPMENT. IT IS CONCERNED WITH THE JOINT EFFECTS OF (1) MOTIVE STRENGTH OF INDIVIDUALS, AND (2) THE EVALUATION STANDARDS OF ORGANIZATIONS, IN DETERMINING WHO WILL ADVANCE MOST RAPIDLY. IT IS HYPOTHESIZED AND SHOWN THAT

JOHN D. ANDREWS

1967-01-01

388

Institute for Software Technology Ad anced RoboticsAdvanced Robotics  

E-print Network

Planar 3-R Manipulator l ki ti h i· planar kinematic chain · moves within one plane · all joints of the medal· two sides of the medal · forward kinematics · inverse kinematics Gerald Steinbauer 8 Advanced Robotics ­ Manipulation and Grasping #12;Institute for Software Technology Kinematic Mechanisms l h i l t f

389

Biotribology of artificial hip joints.  

PubMed

Hip arthroplasty can be considered one of the major successes of orthopedic surgery, with more than 350000 replacements performed every year in the United States with a constantly increasing rate. The main limitations to the lifespan of these devices are due to tribological aspects, in particular the wear of mating surfaces, which implies a loss of matter and modification of surface geometry. However, wear is a complex phenomenon, also involving lubrication and friction. The present paper deals with the tribological performance of hip implants and is organized in to three main sections. Firstly, the basic elements of tribology are presented, from contact mechanics of ball-in-socket joints to ultra high molecular weight polyethylene wear laws. Some fundamental equations are also reported, with the aim of providing the reader with some simple tools for tribological investigations. In the second section, the focus moves to artificial hip joints, defining materials and geometrical properties and discussing their friction, lubrication and wear characteristics. In particular, the features of different couplings, from metal-on-plastic to metal-on-metal and ceramic-on-ceramic, are discussed as well as the role of the head radius and clearance. How friction, lubrication and wear are interconnected and most of all how they are specific for each loading and kinematic condition is highlighted. Thus, the significant differences in patients and their lifestyles account for the high dispersion of clinical data. Furthermore, such consideration has raised a new discussion on the most suitable in vitro tests for hip implants as simplified gait cycles can be too far from effective implant working conditions. In the third section, the trends of hip implants in the years from 2003 to 2012 provided by the National Joint Registry of England, Wales and Northern Ireland are summarized and commented on in a discussion. PMID:25621213

Di Puccio, Francesca; Mattei, Lorenza

2015-01-18

390

Semiconstrained distal radioulnar joint prosthesis.  

PubMed

Distal radioulnar joint (DRUJ) problems can occur as a result of joint instability, abutment, or incongruity. The DRUJ is a weight-bearing joint; the ulnar head is frequently excised either totally or partially, and in some cases it is fused, because of degenerative, rheumatoid, or posttraumatic arthritis. Articles about these procedures report the ability to pronate and supinate, but they rarely discuss grip strength, and even less do they address lifting capacity. We report the long term results of the first 35 patients who underwent total DRUJ arthroplasty with the Aptis DRUJ prosthesis after 5 years follow-up. Surgical indications were all causes of dysfunctional DRUJ (degenerative, posttraumatic, autoimmune, congenital). We recorded data for patient demographics, range of motion (ROM), strength, and lifting capacity of the operated and of the nonoperated extremity. Pain and functional assessments were also recorded. The Aptis DRUJ prosthesis, a bipolar self-stabilizing DRUJ endoprosthesis that restores forearm function, consists of a semiconstained and modular implant designed to replace the function of the ulnar head, the sigmoid notch of the radius, and the triangular fibrocartilage ligaments. The surgical technique is presented in detail. The majority of the patients regained adequate ROM and improved their strength and lifting capacity to the operated side. Pain and activities of daily living were improved. Twelve patients experienced complications, most commonly being extensor carpi ulnaris (ECU) tendinitis, ectopic bone formation, bone resorption with stem loosening, low-grade infection, and need for ball replacement. The Aptis total DRUJ replacement prosthesis is an alternative to salvage procedures that enables a full range of motion as well as the ability to grip and lift weights encountered in daily living activities. PMID:24436788

Savvidou, Christiana; Murphy, Erin; Mailhot, Emilie; Jacob, Shushan; Scheker, Luis R

2013-02-01

391

Biotribology of artificial hip joints  

PubMed Central

Hip arthroplasty can be considered one of the major successes of orthopedic surgery, with more than 350000 replacements performed every year in the United States with a constantly increasing rate. The main limitations to the lifespan of these devices are due to tribological aspects, in particular the wear of mating surfaces, which implies a loss of matter and modification of surface geometry. However, wear is a complex phenomenon, also involving lubrication and friction. The present paper deals with the tribological performance of hip implants and is organized in to three main sections. Firstly, the basic elements of tribology are presented, from contact mechanics of ball-in-socket joints to ultra high molecular weight polyethylene wear laws. Some fundamental equations are also reported, with the aim of providing the reader with some simple tools for tribological investigations. In the second section, the focus moves to artificial hip joints, defining materials and geometrical properties and discussing their friction, lubrication and wear characteristics. In particular, the features of different couplings, from metal-on-plastic to metal-on-metal and ceramic-on-ceramic, are discussed as well as the role of the head radius and clearance. How friction, lubrication and wear are interconnected and most of all how they are specific for each loading and kinematic condition is highlighted. Thus, the significant differences in patients and their lifestyles account for the high dispersion of clinical data. Furthermore, such consideration has raised a new discussion on the most suitable in vitro tests for hip implants as simplified gait cycles can be too far from effective implant working conditions. In the third section, the trends of hip implants in the years from 2003 to 2012 provided by the National Joint Registry of England, Wales and Northern Ireland are summarized and commented on in a discussion.

Di Puccio, Francesca; Mattei, Lorenza

2015-01-01

392

Three-dimensional evaluation of the facet joints  

NASA Astrophysics Data System (ADS)

Computerized tomography and magnetic resonance imaging nave revolurionalized analysis of vertebral anatomy and pathology. Further advances with 3-dimensional imaging have recently become an important adjunct for diagnosis and treatment in structural abnormalities. Facets are intimately related to their surrounding musculature and malalignment may cause pain directly or indirectly. High resolution 3-dimensional reformations of CT Scans give us new insight on structure and function of facet joints, since their motion and architecture are ever complex. It is well documented in the literature that facet joint biomecnanics is a partial contributor to the myriad at causes of low back The term "facet Joint syndrome" was coined in 1933 by GhorMley.3 The osteopathic lesion complex is well defined by LeRoy and McCole and comparison of roentgenographic findings before and after manipulation has teen described by Long and Lioyd.4,5 since alterations in facet biamechanics are an important aspect of osteopathic manipulative therapy (OT), 3-dimensional hign resolution imaging will prove to be a great asset in osteopathic research. Rotating the spine allows for different viewing perspectives to provide optimal and consistent measurements of the facet joint. Rotations are performed on the X, Y and 7, axis and measurements pre and post-manipulation are performed and compared on matching axis and perspectives. Rotation about the X, Y and Z axis help appreciate the 3-dimensionality of the vertebral column to project to the viewer a feeling that the spine is floating in space before them. This does give the viewer a 3-D understanding of the object however, only at a perspective at a Lime.

Folio, Les R.

1990-04-01

393

Management of temporomandibular joint ankylosis.  

PubMed

Temporomandibular joint (TMJ) ankylosis is a pathologic condition where the mandible is fused to the fossa by bony or fibrotic tissues. This interferes with mastication, speech, oral hygiene, and normal life activities, and can be potentially life threatening when struggling to acquire an airway in an emergency. Trauma is the most common cause of TMJ ankylosis, followed by infection. Diagnosis of TMJ ankylosis is usually made by clinical examination and imaging studies. The management goal in TMJ ankylosis is to increase the patient's mandibular function, correct associated facial deformity, decrease pain, and prevent reankylosis. PMID:25483442

Movahed, Reza; Mercuri, Louis G

2015-02-01

394

Joint Center for Artificial Photosynthesis  

ScienceCinema

The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology. Established in 2010 as a U.S. Department of Energy (DOE) Energy Innovation Hub, JCAP aims to find a cost-effective method to produce fuels using only sunlight, water, and carbon dioxide as inputs. JCAP brings together more than 140 top scientists and researchers from the California Institute of Technology and its lead partner, Berkeley Lab, along with collaborators from the SLAC National Accelerator Laboratory, and the University of California campuses at Irvine and San Diego.

Koval, Carl; Lee, Kenny; Houle, Frances; Lewis, Nate

2013-12-19

395

Strapping for temporomandibular joint dysfunction.  

PubMed

Temporomandibular joint dysfunction (TMJD) is a common problem seen in many of the dental clinics. Management of this depends on an accurate diagnosis of the cause for the TMJD. Physical therapy and rehabilitation play a vital role in the management of these dysfunctions. Physical therapy is useful in treating post-traumatic stiffness of the TMJ while strapping of the TMJ for a dysfunction along with conventional physical therapy is of benefit in terms of reduction in click, decrease in pain, and an improvement in function. PMID:18797110

Babu, Abraham Samuel; John, Sandhya Mary; Unni, Amith

2008-01-01

396

Space nuclear system expansion joints  

NASA Technical Reports Server (NTRS)

The engineering, design, and fabrication status of the expansion joint unit (EJU) to be employed in the NaK primary coolant piping loop of the 5-kwe Reactor thermoelectric system are described. Four EJU's are needed in the NaK primary coolant piping loop. The four EJU's which will be identical, utilize bellows as the flexing member, are hermetically sealed, and provide double containment. The bellows are of a nested-formed design, and are to be constructed of 1-ply thickness of 0.010-in. Inconel 718. The EJU's provide a minimum piping load margin of safety of +0.22.

Whitaker, W. D.; Shimazki, T. T.

1973-01-01

397

Fellows Celebrated at Joint Assembly  

NASA Astrophysics Data System (ADS)

The 2009 AGU Fellows were presented at the recent Joint Assembly in Toronto, Ontario, Canada. At a formal ceremony on 26 May 2009, AGU President Timothy L. Grove introduced each Fellow and read a brief statement of the achievements for which each had been selected. The presentations were followed by a reception for meeting attendees and a banquet at which family members and close colleagues further feted the honorees. AGU Fellows are scientists who have attained “acknowledged eminence in the geophysical sciences.” Election to AGU Fellowship is a very high recognition by one's peers. The number of Fellows elected may not exceed 0.1% of the membership in any given year.

2009-06-01

398

Joint Center for Artificial Photosynthesis  

SciTech Connect

The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology. Established in 2010 as a U.S. Department of Energy (DOE) Energy Innovation Hub, JCAP aims to find a cost-effective method to produce fuels using only sunlight, water, and carbon dioxide as inputs. JCAP brings together more than 140 top scientists and researchers from the California Institute of Technology and its lead partner, Berkeley Lab, along with collaborators from the SLAC National Accelerator Laboratory, and the University of California campuses at Irvine and San Diego.

Koval, Carl; Lee, Kenny; Houle, Frances; Lewis, Nate

2013-12-10

399

Health monitoring of 90° bolted joints using fuzzy pattern recognition of ultrasonic signals  

NASA Astrophysics Data System (ADS)

Bolted joints are important parts for aerospace structures. However, there is a significant risk associated with assembling bolted joints due to potential human error during the assembly process. Such errors are expensive to find and correct if exposed during environmental testing, yet checking the integrity of individual fasteners after assembly would be a time consuming task. Recent advances in structural health monitoring (SHM) can provide techniques to not only automate this process but also make it reliable. This integrity monitoring requires damage features to be related to physical conditions representing the structural integrity of bolted joints. In this paper an SHM technique using ultrasonic signals and fuzzy pattern recognition to monitor the integrity of 90° bolted joints in aerospace structures is described. The proposed technique is based on normalized fast Fourier transform (NFFT) of transmitted signals and fuzzy pattern recognition. Moreover, experimental observations of a case study on an aluminum 90° bolted joint are presented. We demonstrate the ability of the proposed method to efficiently monitor and indicate bolted joint integrity.

Jalalpour, M.; El-Osery, A. I.; Austin, E. M.; Reda Taha, M. M.

2014-01-01

400

Joint torsion of several commuting operators.  

E-print Network

We introduce the notion of joint torsion for several commuting operators satisfying a Fredholm condition. This new secondary invariant takes values in the group of invertibles of a field. It is constructed by comparing determinants associated with different filtrations of a Koszul complex. Our notion of joint torsion generalizes the Carey-Pincus joint torsion of a pair of commuting Fredholm operators. As an example, under more restrictive invertibility assumptions, we show that the joint torsion recovers the multiplicative Lefschetz numbers. Furthermore, in the case of Toeplitz operators over the polydisc we provide a link between the joint torsion and the Cauchy integral formula. We will also consider the algebraic properties of the joint torsion. They include a cocycle property, a symmetry property, a triviality property and a multiplicativity property. The proof of these results relies on a quite general comparison theorem for vertical and horizontal torsion isomorphisms associated with certain diagrams of chain complexes.

Jens Kaad

401

High strength concrete provides joint protection  

SciTech Connect

This paper reports on a joint fill material applied on the 24-in. pipe used by Iroquois Gas Transmission Project for its 26-mile Long Island Sound crossing which provides effective joint protection. The 3.35-in. joint fill, made of high instant strength concrete, met stringent requirements for both strength and weight coating, and is environmentally clean to protect the sensitive marine ecosystem. The offshore section, from Bridgeport, Conn., to Long Island, was laid by McDermott, Inc. The high instant strength concrete supplied joint strength and protection during the laying operation, and on the barge itself, where pipe joints are most vulnerable to damage. With joint fill density the same as the concrete already on the pipe, the submerged weight was uniform along the entire length of the marine line, for an essentially seamless coating.

Pool, P. (Offshore Joint Services, Houston, TX (US))

1991-12-01

402

Is joint hypermobility important in prepubertal children?  

Microsoft Academic Search

The purpose of this study was to investigate serum prolidase activity and its relationship with collagen metabolism and joint\\u000a hypermobility, and to determine the prevalence and characteristics of joint hypermobility in prepubertal children. Serum prolidase\\u000a activity was measured spectrophotometrically. Joint hypermobility was defined using Beighton criteria. The children underwent\\u000a complete history and physical examination. Serum levels of prolidase were lower

Pelin Yazgan; ?clal Geyikli; Dost Zeyrek; Lutfu Baktiroglu; Mehmet Ali Kurcer

2008-01-01

403

Software Tools for Analysis of Bonded Joints  

NASA Technical Reports Server (NTRS)

Linear and nonlinear springs have been used to model adhesives in bonded joints. This presentation describes two programs which obtain stresses and strains in bonded joints. For a given bonded joint model, these programs read the corresponding NASTRAN input and output files, use the spring forces or deformations to obtain the adhesive stresses or strain fields, sort the stresses and strains in descending order, and generate Mathematica plot files for three dimensional visualization of the stress and strain fields.

Tahmasebi, Farhad; Broduer, Steve (Technical Monitor)

2001-01-01

404

Entropic uncertainties for joint quantum measurements  

SciTech Connect

We investigate the uncertainty associated with a joint quantum measurement of two spin components of a spin-(1/2) particle and quantify this in terms of entropy. We consider two entropic quantities, the joint entropy and the sum of the marginal entropies, and obtain lower bounds for each of these quantities. For the case of joint measurements where we measure each spin observable equally well, these lower bounds are tight.

Brougham, Thomas [Department of Physics, FJFI, CVUT, Brehova 7, 115 19 Praha 1 (Czech Republic); SUPA, Department of Physics, University of Strathclyde, Glasgow G4 ONG (United Kingdom); Andersson, Erika [SUPA, Department of Physics, School of EPS, Heriot-Watt University, Edinburgh EH14 4As (United Kingdom); Barnett, Stephen M. [SUPA, Department of Physics, University of Strathclyde, Glasgow G4 ONG (United Kingdom)

2009-10-15

405

Improved theoretical solutions for adhesive lap joints  

Microsoft Academic Search

Improved theoretical solutions for adhesively bonded single- and double-lap joints are proposed. The classical theories of Volkersen\\/de Bruyne's solution for double-lap joints, Volkersen's, Goland and Reissner's solutions for single-lap joints, which neglect adherend shear deformations, are used as the bases for the present analyses. The assumption of linear shear stress distributions through the thickness of the adherends is adopted in

J. Morton

1998-01-01

406

Joint hypermobility and fibromyalgia in schoolchildren  

Microsoft Academic Search

OBJECTIVES--To test the hypothesis that joint hypermobility may play a part in the pathogenesis of pain in fibromyalgia, schoolchildren were examined for the coexistence of joint hypermobility and fibromyalgia. METHODS--The study group consisted of 338 children (179 boys, 159 girls; mean age 11.5 years, range 9-15 years) from one public school in Beer-Sheva, Israel. In the assessment of joint hypermobility,

A Gedalia; M Klein; D Buskila

1993-01-01

407

Locked Superior Dislocation of the Acromioclavicular Joint  

PubMed Central

Acromioclavicular (AC) joint injuries account for approximately 3–5% of shoulder girdle injuries (Rockwood et al., 1998). Depending on severity of injury and direction of displacement these are classified using Rockwood classification system for AC joint dislocation. We present an unusual case presenting with locked superior dislocation of the AC joint highlighting the presentation and subsequent successful surgical management of such case. To our knowledge this has not been reported previously in literature. PMID:24455370

Elamin, Salma Eltoum; Webb, Mark

2013-01-01

408

Hydraulic-Leak Detector for Hidden Joints  

NASA Technical Reports Server (NTRS)

Slow leakage of fluid made obvious. Indicator consists of wick wrapped at one end around joint to be monitored. Wick absorbs hydraulic fluid leaking from joint and transmits to opposite end, located outside cover plate and visible to inspector. Leakage manifested as discoloration of outside end of wick. Indicator reveals leaks in hidden fittings on hydraulic lines. Fast inspection of joints without disassembly. Used in aerospace, petroleum, chemical, nuclear, and other industries where removing covers for inspection impossible, difficult, or time-consuming.

Anderson, G. E.; Loo, S.

1986-01-01

409

Thermomigration Versus Electromigration in Microelectronics Solder Joints  

Microsoft Academic Search

Competing mechanisms of electromigration and thermomigration in flip chip SnAgCu (SAC) solder joints were studied experimentally. A daisy chain of solder joints were stressed at 2.0 times 104 Amps\\/cm2, 2.4 times 104 Amps\\/cm2, and 2.8 times 104 Amps\\/cm2 current density levels at room temperature. In the test vehicle, some solder joints were exposed to a combination of electromigration and thermomigration,

Mohd F. Abdulhamid; Cemal Basaran; Yi-Shao Lai

2009-01-01

410

Outcomes of treatment with custom-made temporomandibular joint total joint prostheses and maxillomandibular counter-clockwise rotation  

PubMed Central

The first 25 consecutive patients with high occlusal plane angulation, dysfunction, and pain who were treated with temporomandibular joint (TMJ) total joint prostheses and simultaneous maxillomandibular counterclockwise rotation were evaluated before surgery (T1), immediately after surgery (T2), and at the longest follow-up (T3) for surgical movements and long-term stability. Subjective ratings were used for patients' facial pain/headache, TMJ pain, jaw function, diet, and disability, and objective functional changes were determined by measuring maximum incisal opening and lateral excursive movements. Results showed that the areas of greatest surgical change included an average decrease in the occlusal plane of 13.3 degrees with advancement at point B of 13.4 mm and at the genial tubercles of 16.3 mm. At longest follow-up, relapse was 0.7 degrees, 0.8 mm, and 1.2 mm, respectively, with no statistically significant changes. Significant subjective pain and dysfunction improvements were observed (P ? 0.001). Maximum incisal opening increased, but lateral excursion decreased. Those who had two or more previous TMJ surgeries showed greater levels of dysfunction at T1 and T3 than those who had one or no previous surgeries, but otherwise patients presented similar amounts of absolute changes. In conclusion, end-stage TMJ patients can achieve significant improvement in their pain, dysfunction, dentofacial deformity, and airway problems in one operation with TMJ reconstruction and mandibular advancement using TMJ custom-made total joint prostheses and simultaneous maxillary osteotomies for maxillomandibular counter-clockwise rotation. PMID:18209749

Pinto, Lécio P.; Cárdenas, Luis E.; Molina, Omar R.

2008-01-01

411

Advance directives.  

PubMed

Most patients want some control over their medical care, including-or even especially-when they are too sick to participate in decisions. Clinicians who have to make decisions for patients who are unable to participate often would appreciate guidance from patients' wishes. Advance care planning responds to these needs. The process provides for discussions about goals in different scenarios and allows inclusion of the family and physician as well as the patient. It helps to have the patient and family complete validated worksheets that walk them through the various considerations and result in expressions of preference that are clinically meaningful. For the clinician, scenario-based goals for care and personal thresholds for when desired care shifts from primarily cure-oriented to primarily palliative are the most useful features to know about. The patient and family should do most of the discussing on their own time; the physician and team should coordinate to screen for problems and ensure agreement. Ideally, this should occur over the course of regular clinical encounters, with some dedicated time for the topic at suitable intervals. PMID:17716024

Emanuel, Linda L

2008-01-01

412

Life Estimation of Hip Joint Prosthesis  

NASA Astrophysics Data System (ADS)

Hip joint is one of the largest weight-bearing structures in the human body. In the event of a failure of the natural hip joint, it is replaced with an artificial hip joint, known as hip joint prosthesis. The design of hip joint prosthesis must be such so as to resist fatigue failure of hip joint stem as well as bone cement, and minimize wear caused by sliding present between its head and socket. In the present paper an attempt is made to consider both fatigue and wear effects simultaneously in estimating functional-life of the hip joint prosthesis. The finite element modeling of hip joint prosthesis using HyperMesh™ (version 9) has been reported. The static analysis (load due to the dead weight of the body) and dynamic analysis (load due to walking cycle) have been described. Fatigue life is estimated by using the S-N curve of individual materials. To account for progressive wear of hip joint prosthesis, Archard's wear law, modifications in socket geometry and dynamic analysis have been used in a sequential manner. Using such sequential programming reduction in peak stress has been observed with increase in wear. Finally life is estimated on the basis of socket wear.

Desai, C.; Hirani, H.; Chawla, A.

2014-11-01

413

Failure Assessment Diagram for Titanium Brazed Joints  

NASA Technical Reports Server (NTRS)

The interaction equation was used to predict failure in Ti-4V-6Al joints brazed with Al 1100 filler metal. The joints used in this study were geometrically similar to the joints in the brazed beryllium metering structure considered for the ATLAS telescope. This study confirmed that the interaction equation R(sub sigma) + R(sub Tau) = 1, where R(sub sigma) and R(sub Tau)are normal and shear stress ratios, can be used as conservative lower bound estimate of the failure criterion in ATLAS brazed joints as well as for construction of the Failure Assessment Diagram (FAD).

Flom, Yury; Jones, Justin S.; Powell, Mollie M.; Puckett, David F.

2011-01-01

414

Preloaded space structural coupling joints  

NASA Technical Reports Server (NTRS)

A coupling device for tubular members of large truss structures with a locking collar being the only moving part is described. Each tubular member is constructed with an end bell section that has a belled flange with a mating face, and a necked area which is smaller in diameter than the tubular members to be joined. A split ring is affixed to each tubular member and is constructed so that when two tubular members are laterally moved into axial alignment and the collar is rotated over it, the split ring loads the joint with axial forces by pressing the belled flange mating surfaces together, and a preloading force is provided by the collar mating with a taper on the outside of the split rings. All free play is thereby removed by preloaded force. A major object is to provide an ability to remove and replace individual tubular members without disturbing other structural parts of a truss structure. An additional anticipated use of this joint is to couple high pressure fluid lines.

Rhodes, Marvin D. (inventor)

1987-01-01

415

Temporomandibular joint replacement periprosthetic joint infections: a review of early diagnostic testing options.  

PubMed

The incidence of a periprosthetic joint infection is uncommon after total joint replacement. Since the clinical, psychological, and economic consequences of this complication are substantial, the development of management algorithms based on early diagnostic testing has been the subject of continued exploration in the orthopaedic literature. While there has been discussion of this topic in the total temporomandibular joint replacement literature and preliminary management algorithms have been established, no diagnostic testing protocols have been proposed or studied for the management of early and/or late periprosthetic joint infections. This paper will review the classification of periprosthetic joint infections, the associated risk factors, the clinical sensitivity and specificity of laboratory and imaging diagnostic studies and their utility in the management of early and late onset orthopaedic periprosthetic joint infections. This review may provide an initial framework for the use of early diagnostic testing for the management of total temporomandibular joint replacement periprosthetic joint infections and stimulate further investigation into this topic. PMID:25048029

Mercuri, L G

2014-10-01

416

Recent advances in shoulder research  

PubMed Central

Shoulder pathology is a growing concern for the aging population, athletes, and laborers. Shoulder osteoarthritis and rotator cuff disease represent the two most common disorders of the shoulder leading to pain, disability, and degeneration. While research in cartilage regeneration has not yet been translated clinically, the field of shoulder arthroplasty has advanced to the point that joint replacement is an excellent and viable option for a number of pathologic conditions in the shoulder. Rotator cuff disease has been a significant focus of research activity in recent years, as clinicians face the challenge of poor tendon healing and irreversible changes associated with rotator cuff arthropathy. Future treatment modalities involving biologics and tissue engineering hold further promise to improve outcomes for patients suffering from shoulder pathologies. PMID:22709417

2012-01-01

417

Advanced Emissions Control Development Program  

SciTech Connect

The objective of the Advanced Emissions Control Development Program (AECDP) is to develop practical, cost-effective strategies for reducing the emissions of air toxics from coal-fired boilers. Ideally, the project aim is to effectively control air toxic emissions through the use of conventional flue gas cleanup equipment such as electrostatic precipitators (ESPS), fabric filters (baghouse), and wet flue gas desulfurization. Development work to date has concentrated on the capture of mercury, other trace metals, fine particulate and hydrogen chloride. Following the construction and evaluation of a representative air toxics test facility in Phase I, Phase II focused on the evaluation of mercury and several other air toxics emissions. The AECDP is jointly funded by the United States Department of Energy's Federal Energy Technology Center (DOE), the Ohio Coal Development Office within the Ohio Department of Development (oCDO), and Babcock& Wilcox-a McDermott company (B&W).

A.P.Evans; K.E. Redinger; M.J. Holmes

1998-04-01

418

Advances in managing ankylosing spondylitis  

PubMed Central

Ankylosing spondylitis (AS) is a chronic inflammatory disease with prominent involvement of the spine and sacroiliac joints which frequently leads to significant spine deformity and disability. The development of effective therapies for AS, particularly with anti-tumor necrosis factor agents, has resulted in improved symptoms and functions for many patients, and clinical research increasingly suggests that effective therapy can also prevent destruction in the spine and other structures. Recent focus of disease classification in AS has emphasized that many individuals with features of inflammatory back pain but no visible changes on plain x-rays have active inflammatory disease when imaged with magnetic resonance imaging (MRI). Recent studies indicate that individuals with “non-radiographic” spondylitis can also respond to anti-inflammatory therapies. Several new agents are also showing promise for treatment of AS. These developments represent a significant advance in the management of this debilitating condition. PMID:25343035

Chen, Patty P.

2014-01-01

419

Nurse-led orthopaedic clinic in total joint replacement.  

PubMed

OBJECTIVES. To introduce the practice of a nurse-led orthopaedic clinic for managing stable patients after total hip or knee replacement and to evaluate its efficacy. DESIGN. Case series. SETTING. A public hospital in Hong Kong. PATIENTS. Patients who had stable primary total knee replacement or total hip replacement done for longer than 2 years were managed in a nurse-led total joint replacement pilot clinic. RESULTS. From July 2012 to March 2014, 431 patients (including 317 with total knee replacement and 114 with total hip replacement) were handled, and 408 (94.7%) nurse assessments were independently performed. Six cases of prosthesis-related complications were diagnosed. One patient was hospitalised for prosthetic complications within 3 months after follow-up. The satisfaction rate was 100%. From November 2012 to April 2013, an advanced practice nurse, one resident specialist, and one associate consultant independently charted Knee Society Knee Score or Harris Hip Score for the patients attending preoperative assessment clinic to check the inter-observer reliability. Overall, 23 patients with 37 knees and 11 patients with 17 hips were examined. The mean correlation coefficient between assessments by the associate consultant and advanced practice nurse was 0.912 for Knee Society Knee Score, and 0.761 for Harris Hip Score. The advanced practice nurse could achieve better or equally good correlation with associate consultant when compared with the correlation between resident specialist and associate consultant (0.866 and 0.521 for Knee Society Knee Score and Harris Hip Score, respectively) and with international standard. CONCLUSION. Nurse-led total joint replacement clinic was safe, reliable, and well accepted by patients. PMID:25170054

Fan, J Ch; Lo, C Km; Kwok, C Kb; Fung, K Y

2014-12-01

420

Joint Attention in Autism: Teaching Smiling Coordinated with Gaze to Respond to Joint Attention Bids  

ERIC Educational Resources Information Center

Children with autism demonstrate early deficits in joint attention and expressions of affect. Interventions to teach joint attention have addressed gaze behavior, gestures, and vocalizations, but have not specifically taught an expression of positive affect such as smiling that tends to occur during joint attention interactions. Intervention was…

Krstovska-Guerrero, Ivana; Jones, Emily A.

2013-01-01

421

Joint Control for Dummies: An Elaboration of Lowenkron's Model of Joint (Stimulus) Control  

ERIC Educational Resources Information Center

The following paper describes Lowenkron's model of joint (stimulus) control. Joint control is described as a means of accounting for performances, especially generalized performances, for which a history of contingency control does not provide an adequate account. Examples are provided to illustrate instances in which joint control may facilitate…

Sidener, David W.

2006-01-01

422

Information management for real-time multimedia battlefield information dissemination and processing  

Microsoft Academic Search

The warfighter of tomorrow will demand near real time multimedia data access to obtain critical information in rapidly changing battlefield situation. Phase 1 of the Battlefield Awareness and Data Dissemination (BADD) Advanced Concept Technology Demonstration (ACTD) developed a near real time multimedia data access capability to provide the warfighter with sensor and command and control data on an integrated display.

Thomas C. Newsome; Dupyo Choi; Michael P. Orr

1998-01-01

423

An Intelligent Tutoring System for Adult Literacy Enhancement  

Microsoft Academic Search

Highly advanced interactive computer-based training courses are being developed as technology plays an increasingly significant role in training warfighers. Job aids and other field operation guides also contribute to warfighter performance enhancement. But these programs are only as effective as the readiness of the warfighters to benefit from them. Lack of certain basic skills, like reading comprehension, can significantly hinder

Sowmya Ramachandran; Richard Stottler

424

Chord, Tie Bar & Crossbracing Joint Detail in Plan; Crossbracing ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Chord, Tie Bar & Crossbracing Joint Detail in Plan; Crossbracing Center Joint Detail in Plan; Chord Joining Detail in Plan & Elevation; Chord, Panel Post, Tie Bar, & Diagonal Brace Joint Detail; Crossbracing Center Joint Detail in Section; Chord, Panel Post, Tie Bar & Horizontal Brace Joint Detail - Narrows Bridge, Spanning Sugar Creek at Old County Road 280 East, Marshall, Parke County, IN

425

Joint drive development for the Space Station Remote Manipulator System  

Microsoft Academic Search

Parts of the design of the Space Station Remote Manipulator System's joint drive (the motor and drive electronics) have reached the proof of concept phase, while other parts (the joint drive module, joint housing, and joint electronic unit packaging) exist at present only as mockups of design concepts. The system requirements for the joint drive are outlined and the drive

W. J. Ballantyne

1990-01-01

426

SCIENCE BRIEF: ADVANCED CONCEPTS  

EPA Science Inventory

Research on advanced concepts will evaluate and demonstrate the application of innovative infrastructure designs, management procedures and operational approaches. Advanced concepts go beyond simple asset management. The infusion of these advanced concepts into established wastew...

427

Advance Care Planning  

MedlinePLUS

... burden off family and friends. What Is Advance Care Planning? Advance care planning involves learning about the ... change in your health. Medical Research and Advance Care Planning Medical research plays an important role in ...

428

Joint Committee on Atomic Energy  

NSDL National Science Digital Library

From 1946 to 1977, the Joint Committee on Atomic Energy (JAEC) was responsible for making "continuing studies of the activities of the Atomic Energy Commission and of problems relating to the development, use, and control of atomic energy." Over three decades, the Committee looked into peacetime uses of atomic energy, international agreements regarding atomic energy, and various mutual defense agreements. The good people at the Stanford University Libraries & Academic Information Resources (SULAIR) have created this text archive of over 144,000 pages of source materials from the hearings of this committee. Visitors may wish to start with the "About the Collection" area, as it provides a bit more information on the scope of the materials here. After this, visitors are welcome to perform a simple search across the collection, or they may also wish to browse around at their leisure. The site is rounded out by a list of additional sites and resources.

429

Temperomandibular joint ankylosis in children  

PubMed Central

Temperomandibular joint (TMJ) ankylosis or hypo mobility involves fusion of the mandibular condyle to the base of the skull. Impairment of speech, difficulty in mastication, poor oral hygiene, rampant caries, and acute compromise of the airway pose a severe psychological burden on the tender minds of children. The treatment of TMJ ankylosis poses a significant challenge because of technical difficulties and a high incidence of recurrence. This report describes a case of 7-year-old with inability to open mouth, diagnosed with unilateral right bony TMJ ankylosis. The surgical approach consisted of inter-positional arthroplasty followed by physiotherapy. A detailed history, clinical and functional examination, and radiographic examination facilitating correct diagnosis followed by immediate surgical intervention and physiotherapy can help us to restore physical, psychological and emotional health of the child patient. PMID:25210367

Jayavelu, Perumal; Shrutha, S. P.; Vinit, G. B.

2014-01-01

430

Fellows Celebrated at Joint Assembly  

NASA Astrophysics Data System (ADS)

A highlight of the 2006 Joint Assembly in Baltimore, MD. was the presentation of certificates to the 2006 class of AGU Fellows. At a black tie ceremony held on 25 May, AGU President John Orcutt introduced each Fellow and read a brief statement of the achievements for which he or she had been selected. The presentations were followed by a reception for meeting attendees and a banquet at which family members and close colleagues further feted the honorees. AGU Fellows are scientists who have attained ``acknowledged eminence in the geophysical sciences.'' Election to AGU Fellowship is a very high recognition by one's peers. The number of Fellows elected may not exceed 0.1% of the membership in any given year.

2006-06-01

431

Environmental durability of adhesively bonded joints  

Microsoft Academic Search

The goal of this project was to evaluate the environmental durability of adhesively bonded aircraft joints using fracture mechanics. Three aerospace adhesives, two epoxies and one polyimide, were investigated. Adhesive specimens were tested for tensile and toughness behavior. Bonded joint specimens were subject to Mode I, Mode II, and mixed mode fracture and fatigue tests. Prior to testing, selected specimens

Lawrence Michael Butkus

1997-01-01

432

Rolling-Convolute Joint For Pressurized Glove  

NASA Technical Reports Server (NTRS)

Rolling-convolute metacarpal/finger joint enhances mobility and flexibility of pressurized glove. Intended for use in space suit to increase dexterity and decrease wearer's fatigue. Also useful in diving suits and other pressurized protective garments. Two ring elements plus bladder constitute rolling-convolute joint balancing torques caused by internal pressurization of glove. Provides comfortable grasp of various pieces of equipment.

Kosmo, Joseph J.; Bassick, John W.

1994-01-01

433

Adaptive joint fuzzy sets for function approximation  

Microsoft Academic Search

This paper presents a new method to create and tune joint fuzzy sets. Multidimensional fuzzy sets define the if-part fuzzy sets of rules in feedforward fuzzy function approximators. These joint set functions do not factor into a product of scalar fuzzy sets (such as triangles or bell curves) and so they do not ignore the correlation structure among the input

Sanya Mitaim; Bart Kosko

1997-01-01

434

Fatigue of welded joints under complex loading  

Microsoft Academic Search

The majority of fatigue data for welded joints are for plate specimens under simple uniaxial direct tension, whereas in practice, joints in large structures are frequently subjected to more complex loading. There are very few fatigue test results for such conditions and hence design must currently be based on the published design curves for uniaxial stressing. The objective of the

P. J. Tubby

1997-01-01

435

Joint Notice of Privacy Practices of  

E-print Network

diseases · Drug and alcohol abuse treatment · Mental health · HIV/AIDS · Reproductive health for minorsJoint Notice of Privacy Practices of UW Medicine and Certain Other Providers EFFECTIVE MAY 15, 2013 #12;1 Notice of Privacy Practices -- Summary 3 Joint Notice of Privacy Practices of UW Medicine

Borenstein, Elhanan

436

Joint Learning Improves Semantic Role Labeling  

Microsoft Academic Search

Despite much recent progress on accu- rate semantic role labeling, previous work has largely used independent classifiers, possibly combined with separate label se- quence models via Viterbi decoding. This stands in stark contrast to the linguistic observation that a core argument frame is a joint structure, with strong dependen- cies between arguments. We show how to build a joint model

Kristina Toutanova; Aria Haghighi; Christopher D. Manning

2005-01-01

437

Application of Hemi-Hip Joint Arthroplasty  

Microsoft Academic Search

Total hip replacement and hip resurfacing arthroplasty are two popular methods for curing the diseases of hip joints to date. While the technology can be considered to be mature, there are still some problems in practice. So, another method, hemi-hip joint arthroplasty, was introduced in this paper. The structure and materials of the prothesis, its experiments in vitro and the

Lan Chen; Mingzhao Chen; Lantian Chen; Ming Hu; Yiwang Bao

2008-01-01

438

CHECKing radiographic joint damage in early osteoarthritis  

Microsoft Academic Search

Osteoarthritis (OA) is the most common joint disease, characterized by pain and functional disability. OA commonly involves the larger joints, with symptomatic knee and hip OA affecting 6% and 3% of the adult population (age 30 years and over), respectively. The prevalence and disease duration will increase in the coming years since known risk factors for OA (ageing and obesity)

M. B. Kinds

2012-01-01

439

An Operant Analysis of Joint Attention Skills  

ERIC Educational Resources Information Center

Joint attention, a synchronizing of the attention of two or more persons, has been an increasing focus of research in cognitive developmental psychology. Research in this area has progressed mainly outside of behavior analysis, and behavior-analytic research and theory has tended to ignore the work on joint attention. It is argued here, on the one…

Holth, Per

2005-01-01

440

Navstar Global Positioning System Joint Program Office  

NSDL National Science Digital Library

The Navstar Global Positioning System Joint Program Office site provides links to Navstar and GPS, the Joint Program Office, user equipment, space segment, control segment, CSEL Program Office, acquisition logistics, contacts, resources, GPS program library, configuration management, system engineering, user equipment sustainment, and pseudo random noise requests.

Office, Navstar G.

441

Suspending and Reinstating Joint Activities with Dialogue  

ERIC Educational Resources Information Center

Interruptions are common in joint activities like conversations. Typically, interrupted participants suspend the activity, address the interruption, and then reinstate the activity. In conversation, people jointly commit to interact and to talk about a topic, establishing these commitments sequentially. When a commitment is suspended, face is…

Chevalley, Eric; Bangerter, Adrian

2010-01-01

442

Formation of sheeting joints in concave slopes  

Microsoft Academic Search

Sheeting joints are a structural manifestation of the interaction between the topographic surface and the stresses near the surface. Sheeting joints are predicted to open in two-dimensional valleys and ridges where the following inequality holds: Pk > rhog cosbeta, where P is the normal stress parallel to the fall line of the slope, k is the curvature of the slope,

S. J. Martel; P. Larin

2006-01-01

443

High temperature ceramic/metal joint structure  

DOEpatents

A high temperature turbine engine includes a hybrid ceramic/metallic rotor member having ceramic/metal joint structure. The disclosed joint is able to endure higher temperatures than previously possible, and aids in controlling heat transfer in the rotor member.

Boyd, Gary L. (Tempe, AZ)

1991-01-01

444

Polymatroid Optimization, Submodularity, and Joint Replenishment Games  

E-print Network

that is associated with the well-known joint replenishment model. In this model, there are multiple retailers which sell a single product. Con- stant customer demand occurs at each retailer over an infinite time horizon with the well-known joint replenishment model. By applying our general results on polymatroid optimization, we

Zhang, Shuzhong

445

21 CFR 26.73 - Joint Committee.  

Code of Federal Regulations, 2010 CFR

...representatives of the United States and the European Community (EC) will be established. The Joint Committee shall be responsible...and others deemed necessary. (c) The United States and the EC shall each have one vote in the Joint Committee. The...

2010-04-01

446

Sensate Scaffolds Can Reliably Detect Joint Loading  

PubMed Central

Treatment of cartilage defects is essential to the prevention of osteoarthritis. Scaffold-based cartilage tissue engineering shows promise as a viable technique to treat focal defects. Added functionality can be achieved by incorporating strain gauges into scaffolds, thereby providing a real-time diagnostic measurement of joint loading. Strain-gauged scaffolds were placed into the medial femoral condyles of 14 adult canine knees and benchtop tested. Loads between 75 and 130 N were applied to the stifle joints at 30°, 50°, and 70° of flexion. Strain-gauged scaffolds were able to reliably assess joint loading at all applied flexion angles and loads. Pressure sensitive films were used to determine joint surface pressures during loading and to assess the effect of scaffold placement on joint pressures. A comparison of peak pressures in control knees and joints with implanted scaffolds, as well as a comparison of pressures before and after scaffold placement, showed that strain-gauged scaffold implantation did not significantly alter joint pressures. Future studies could possibly use strain-gauged scaffolds to clinically establish normal joint loads and to determine loads that are damaging to both healthy and tissue-engineered cartilage. Strain-gauged scaffolds may significantly aid the development of a functional engineered cartilage tissue substitute as well as provide insight into the native environment of cartilage. PMID:16941586

Bliss, C. L.; Szivek, J. A.; Tellis, B. C.; Margolis, D. S.; Schnepp, A. B.; Ruth, J. T.

2008-01-01

447

Joint interaction with embedded concretions: joint loading configurations inferred from propagation paths  

NASA Astrophysics Data System (ADS)

The interaction between propagating joints and embedded concretions in a Devonian black shale near Seneca Lake, NY, permits identification of the loading configurations responsible for two joint sets of different ages striking at nearly the same orientation. The earlier set consists of systematic joints cut by later Alleghanian joints of the Appalachian Plateau. The later set consists of non-systematic curving cross joints that abut these same Alleghanian joints. Field evidence shows that concretions functioned as stiff inclusions in a compliant black shale. As a consequence of this elastic contrast, local perturbations in the remote stress field persisted around the concretions during burial, tectonic deformation, and exhumation. These stress perturbations influenced joint propagation paths of both joint sets. Our conclusions about loading configurations are based on finite-element modeling of the effect of the local stress perturbation on concretion-modified joint propagation. Modeling shows that the local stress perturbation from a thermoelastic loading was responsible for deflecting cross joints away from concretions in a curved propagation path near the concretion. This load configuration also led to arrest of cross joints before they penetrated the shale-concretion interface. At greater distances from the concretion, the propagation path of cross joints was controlled by the contemporary tectonic stress field. The interface between concretions and the surrounding shale was strongly bonded, as indicated by the crossing of the interface by some of the systematic ENE joints. Higher compressive stress levels within the concretions relative to the shale suppressed joint development in the concretion, causing the arrest of those joints once they had driven across the interface and a short distance into the concretion. Numerical modeling shows that interface penetration by the systematic ENE joints is consistent with a fluid load, the same loading configuration postulated for the subsequent Alleghanian joints. The traces of the systematic ENE joints align on opposite sides of concretions, rather than curving toward the concretion as predicted by two-dimensional models of the fluid load. Co-planar traces are indicative of large, planar joints propagating in-plane around the concretion, making it energetically inefficient for the crack front to curve as it enters the local stress perturbation near the concretion. A fluid load for the systematic ENE joints came from high pore pressure during the pre-Alleghanian stages of burial of the Devonian Catskill delta complex.

McConaughy, David T.; Engelder, Terry

1999-11-01

448

Two-axis joint assembly and method  

NASA Technical Reports Server (NTRS)

In an embodiment, a two-axis joint that utilizes planar reactions to handle moments applied to the side of the joint thereby allowing the device to remain low profile and compact with minimal intrusion to the mounting surface of the two-axis joint. To handle larger moments, the diameter of the planar member can be increased without increasing the overall height of the joint assembly thereby retaining the low profile thereof. Upper and lower antifriction bearings may be positioned within a housing engage the planar member to reduce rotational friction. The upper and lower bearings and a hub which supports the planar member transfer forces produced by moments applied to the side of the joint so as to spread the forces over the area of the housing.

Le, Thang D. (Inventor); Lewis, James L. (Inventor); Carroll, Monty B. (Inventor)

2010-01-01

449

Shear joint capability versus bolt clearance  

NASA Technical Reports Server (NTRS)

The results of a conservative analysis approach into the determination of shear joint strength capability for typical space-flight hardware as a function of the bolt-hole clearance specified in the design are presented. These joints are comprised of high-strength steel fasteners and abutments constructed of aluminum alloys familiar to the aerospace industry. A general analytical expression was first arrived at which relates bolt-hole clearance to the bolt shear load required to place all joint fasteners into a shear transferring position. Extension of this work allowed the analytical development of joint load capability as a function of the number of fasteners, shear strength of the bolt, bolt-hole clearance, and the desired factor of safety. Analysis results clearly indicate that a typical space-flight hardware joint can withstand significant loading when less than ideal bolt hole clearances are used in the design.

Lee, H. M.

1992-01-01

450

Mechanically Induced g-Jitter from Space Station Rotary Joints  

NASA Technical Reports Server (NTRS)

The mission of the International Space Station is to provide a working laboratory in orbit for research in engineering, life sciences, and microgravity. Among the microgravity disciplines that are preparing to utilize this international resource are materials processing, combustion, fluid dynamics, biotechnology, and fundamental physics. The Station promises to enable significant advances in each of these areas by making available a research facility in which gravitational and other accelerations, and their corresponding buoyancy and diffusion effects on various physical processes, are orders of magnitude lower than they are on Earth. In order to fulfill this promise, it is not enough for the Space Station to simply replicate a typical terrestrial scientific laboratory in orbit. Although an orbiting laboratory is free of most of the effects of gravitational acceleration by virtue of its free fall condition, it also produces structural vibration or jitter that can interfere with the processes under study. To ensure the quality of the acceleration environment and enable a successful mission, the Space Station Program has limited potential disturbances in two ways: first, by isolating the most sensitive payloads from the vehicle structure, and second, by quieting major disturbances at their sources. The first area, payload isolation, is implemented inside the pressurized modules at the rack level. Sub-rack level isolators have also been developed. This paper addresses the second area, disturbance source limits, for one of the major sources of mechanical noise on the Space Station: the Solar Alpha Rotary Joints. Due to the potential for large disturbances to the microgravity environment, an initial analytical prediction of rotary joint vibration output was made. Key components were identified and tested to validate the analytical predictions. Based on the component test results, the final vibration output of the joints was verified by a test on each fully assembled flight unit. This paper describes the Space Station microgravity requirements, the rotary joint hardware, and the disturbance producing aspects of joint operation. The test setup, instrumentation, test conditions, and results for the component level and system level measurements are described. An overall forcing function that describes the maximum torque imparted to the Station is created based on the test results, and these disturbances are shown to meet the applicable Space Station microgravity requirements.

Boucher, Robert L.

2000-01-01

451

Command Brief Summer (4th) Quarter  

E-print Network

and War-Fighting curricula (e.g., Anti-Submarine Warfare) 1996 Information Warfare Curriculum 1999 Joint) · Electronic Warfare Systems · Human Systems Integration · Identity Management and Cyber Security (Resident

452

21 CFR 888.3780 - Wrist joint polymer constrained prosthesis.  

Code of Federal Regulations, 2011 CFR

... Wrist joint polymer constrained prosthesis. 888.3780 Section 888.3780... Wrist joint polymer constrained prosthesis. (a) Identification. A wrist joint polymer constrained prosthesis is a device made of...

2011-04-01

453

Chord Splicing & Joining Detail; Chord & CrossBracing Joint Details; ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Chord Splicing & Joining Detail; Chord & Cross-Bracing Joint Details; Cross Bracing Center Joint Detail; Chord & Diagonal Joint Detail - Vermont Covered Bridge, Highland Park, spanning Kokomo Creek at West end of Deffenbaugh Street (moved to), Kokomo, Howard County, IN

454

Chord, Horizontal Tie Bar & Crossbracing Joint Details; Crossbracing Center ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Chord, Horizontal Tie Bar & Crossbracing Joint Details; Crossbracing Center Joint Detail; Chord, Panel Posts, Braces & Counterbrace Joint Detail - Brownsville Covered Bridge, Spanning East Fork Whitewater River (moved to Eagle Creek Park, Indianapolis), Brownsville, Union County, IN

455

15 CFR 922.192 - Joint Management Committee.  

... 2014-01-01 2014-01-01 false Joint Management Committee. 922.192 Section...Sanctuary and Underwater Preserve § 922.192 Joint Management Committee. (a) A state/federal Joint Management Committee shall be...

2014-01-01

456

14 CFR 406.139 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Joint procedural or discovery schedule. 406...Transportation Adjudications § 406.139 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2010-01-01

457

46 CFR 56.30-3 - Piping joints (reproduces 110).  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Piping joints (reproduces 110). 56.30-3 Section 56...APPURTENANCES Selection and Limitations of Piping Joints § 56.30-3 Piping joints (reproduces 110). The type of piping...

2012-10-01

458

14 CFR 13.217 - Joint procedural or discovery schedule.  

...2014-01-01 2014-01-01 false Joint procedural or discovery schedule. 13...FAA Civil Penalty Actions § 13.217 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2014-01-01

459

12 CFR 330.9 - Joint ownership accounts.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Joint ownership accounts. 330.9 Section...DEPOSIT INSURANCE COVERAGE § 330.9 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2011-01-01

460

12 CFR 330.9 - Joint ownership accounts.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Joint ownership accounts. 330.9 Section...DEPOSIT INSURANCE COVERAGE § 330.9 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2012-01-01

461

12 CFR 745.8 - Joint ownership accounts.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Joint ownership accounts. 745.8 Section...Account Insurance Coverage § 745.8 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2012-01-01

462

15 CFR 922.192 - Joint Management Committee.  

Code of Federal Regulations, 2012 CFR

... 2012-01-01 2012-01-01 false Joint Management Committee. 922.192 Section...Sanctuary and Underwater Preserve § 922.192 Joint Management Committee. (a) A state/federal Joint Management Committee shall be...

2012-01-01

463

Joint Robotic Precursor Activity: Providing Strategic Knowledge to  

E-print Network

Joint Robotic Precursor Activity: Providing Strategic Knowledge to Inform Future Exploration Dr. Michael J. Wargo, Chief Exploration Scientist #12;Joint Robotic Precursor Activity (JRPA) Overview · To meet this goal, NASA will jointly fund and conduct Robotic Precursor Activities

Waliser, Duane E.

464

21 CFR 872.3940 - Total temporomandibular joint prosthesis.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Total temporomandibular joint prosthesis. 872.3940 Section 872...872.3940 Total temporomandibular joint prosthesis. (a) Identification. A total temporomandibular joint prosthesis is a device that is...

2011-04-01

465

14 CFR 406.139 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Joint procedural or discovery schedule. 406...Transportation Adjudications § 406.139 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2011-01-01

466

12 CFR 330.9 - Joint ownership accounts.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Joint ownership accounts. 330.9 Section...DEPOSIT INSURANCE COVERAGE § 330.9 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2013-01-01

467

21 CFR 872.3940 - Total temporomandibular joint prosthesis.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Total temporomandibular joint prosthesis. 872.3940 Section 872...872.3940 Total temporomandibular joint prosthesis. (a) Identification. A total temporomandibular joint prosthesis is a device that is...

2012-04-01

468

50 CFR 452.09 - Consolidated and joint proceedings.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Consolidated and joint proceedings. 452.09 Section 452.09 Wildlife and Fisheries JOINT REGULATIONS (UNITED STATES FISH...SECRETARY § 452.09 Consolidated and joint proceedings. (a) When the...

2010-10-01

469

12 CFR 745.8 - Joint ownership accounts.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Joint ownership accounts. 745.8 Section...Account Insurance Coverage § 745.8 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2011-01-01

470

46 CFR 56.30-3 - Piping joints (reproduces 110).  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Piping joints (reproduces 110). 56.30-3 Section 56...APPURTENANCES Selection and Limitations of Piping Joints § 56.30-3 Piping joints (reproduces 110). The type of piping...

2013-10-01

471

15 CFR 922.192 - Joint Management Committee.  

Code of Federal Regulations, 2011 CFR

... 2011-01-01 2011-01-01 false Joint Management Committee. 922.192 Section...Sanctuary and Underwater Preserve § 922.192 Joint Management Committee. (a) A state/federal Joint Management Committee shall be...

2011-01-01

472

21 CFR 872.3940 - Total temporomandibular joint prosthesis.  

...2014-04-01 false Total temporomandibular joint prosthesis. 872.3940 Section 872...872.3940 Total temporomandibular joint prosthesis. (a) Identification. A total temporomandibular joint prosthesis is a device that is...

2014-04-01

473

14 CFR 13.217 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Joint procedural or discovery schedule. 13...FAA Civil Penalty Actions § 13.217 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2011-01-01

474

14 CFR 406.139 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Joint procedural or discovery schedule. 406...Transportation Adjudications § 406.139 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2013-01-01

475

50 CFR 452.09 - Consolidated and joint proceedings.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Consolidated and joint proceedings. 452.09 Section 452.09 Wildlife and Fisheries JOINT REGULATIONS (UNITED STATES FISH...SECRETARY § 452.09 Consolidated and joint proceedings. (a) When the...

2013-10-01

476

49 CFR 1503.627 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Joint procedural or discovery schedule. 1503...Civil Penalty Actions § 1503.627 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2010-10-01

477

14 CFR 13.217 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Joint procedural or discovery schedule. 13...FAA Civil Penalty Actions § 13.217 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2013-01-01

478

50 CFR 452.09 - Consolidated and joint proceedings.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Consolidated and joint proceedings. 452.09 Section 452.09 Wildlife and Fisheries JOINT REGULATIONS (UNITED STATES FISH...SECRETARY § 452.09 Consolidated and joint proceedings. (a) When the...

2011-10-01

479

49 CFR 240.229 - Requirements for joint operations territory.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false Requirements for joint operations territory. 240.229 Section...Certification Process § 240.229 Requirements for joint operations territory. (a) Except for minimal joint operations provided for in paragraph...

2013-10-01

480

46 CFR 56.30-3 - Piping joints (reproduces 110).  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Piping joints (reproduces 110). 56.30-3 Section 56...APPURTENANCES Selection and Limitations of Piping Joints § 56.30-3 Piping joints (reproduces 110). The type of piping...

2011-10-01

481

75 FR 51061 - Joint and Several Liability Reallocation Agreement  

Federal Register 2010, 2011, 2012, 2013

...FARM CREDIT ADMINISTRATION RIN 3052-AC64 Joint and Several Liability Reallocation Agreement...Credit Administration. ACTION: Notice of joint and several liability reallocation agreement...FCA or we) is publishing for comment a Joint and Several Liability Reallocation...

2010-08-18

482

14 CFR 13.217 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Joint procedural or discovery schedule. 13...FAA Civil Penalty Actions § 13.217 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2010-01-01

483

12 CFR 745.8 - Joint ownership accounts.  

...2014-01-01 2014-01-01 false Joint ownership accounts. 745.8 Section...Account Insurance Coverage § 745.8 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2014-01-01

484

15 CFR 922.192 - Joint Management Committee.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 2013-01-01 false Joint Management Committee. 922.192 Section...Sanctuary and Underwater Preserve § 922.192 Joint Management Committee. (a) A state/federal Joint Management Committee shall be...

2013-01-01

485

49 CFR 1503.627 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Joint procedural or discovery schedule. 1503...Civil Penalty Actions § 1503.627 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2011-10-01

486

49 CFR 1503.627 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Joint procedural or discovery schedule. 1503...Civil Penalty Actions § 1503.627 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2013-10-01

487

14 CFR 406.139 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Joint procedural or discovery schedule. 406...Transportation Adjudications § 406.139 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2012-01-01

488

12 CFR 745.8 - Joint ownership accounts.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Joint ownership accounts. 745.8 Section...Account Insurance Coverage § 745.8 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2010-01-01

489

12 CFR 330.9 - Joint ownership accounts.  

...2014-01-01 2014-01-01 false Joint ownership accounts. 330.9 Section...DEPOSIT INSURANCE COVERAGE § 330.9 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2014-01-01

490

49 CFR 1503.627 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Joint procedural or discovery schedule. 1503...Civil Penalty Actions § 1503.627 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2012-10-01

491

12 CFR 330.9 - Joint ownership accounts.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Joint ownership accounts. 330.9 Section...DEPOSIT INSURANCE COVERAGE § 330.9 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2010-01-01

492

14 CFR 406.139 - Joint procedural or discovery schedule.  

...2014-01-01 2014-01-01 false Joint procedural or discovery schedule. 406...Transportation Adjudications § 406.139 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2014-01-01

493

50 CFR 452.09 - Consolidated and joint proceedings.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Consolidated and joint proceedings. 452.09 Section 452.09 Wildlife and Fisheries JOINT REGULATIONS (UNITED STATES FISH...SECRETARY § 452.09 Consolidated and joint proceedings. (a) When the...

2012-10-01

494

49 CFR 1503.627 - Joint procedural or discovery schedule.  

...2014-10-01 2014-10-01 false Joint procedural or discovery schedule. 1503...Civil Penalty Actions § 1503.627 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2014-10-01

495

49 CFR 240.229 - Requirements for joint operations territory.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Requirements for joint operations territory. 240.229 Section...Certification Process § 240.229 Requirements for joint operations territory. (a) Except for minimal joint operations provided for in paragraph...

2012-10-01

496

49 CFR 240.229 - Requirements for joint operations territory.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false Requirements for joint operations territory. 240.229 Section...Certification Process § 240.229 Requirements for joint operations territory. (a) Except for minimal joint operations provided for in paragraph...

2010-10-01

497

14 CFR 13.217 - Joint procedural or discovery schedule.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Joint procedural or discovery schedule. 13...FAA Civil Penalty Actions § 13.217 Joint procedural or discovery schedule. ...schedule. If the parties agree to a joint procedural or discovery schedule,...

2012-01-01

498

12 CFR 745.8 - Joint ownership accounts.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Joint ownership accounts. 745.8 Section...Account Insurance Coverage § 745.8 Joint ownership accounts. (a) Separate insurance coverage. Qualifying joint accounts, whether owned as...

2013-01-01

499

46 CFR 56.30-3 - Piping joints (reproduces 110).  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Piping joints (reproduces 110). 56.30-3 Section 56...APPURTENANCES Selection and Limitations of Piping Joints § 56.30-3 Piping joints (reproduces 110). The type of piping...

2010-10-01

500

49 CFR 240.229 - Requirements for joint operations territory.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Requirements for joint operations territory. 240.229 Section...Certification Process § 240.229 Requirements for joint operations territory. (a) Except for minimal joint operations provided for in paragraph...

2011-10-01