Sample records for main parameters affecting

  1. Chloride penetration into concrete in marine environment—Part I: Main parameters affecting chloride penetration

    Microsoft Academic Search

    A. Costa; J. Appleton

    1999-01-01

    The durability of concrete structures exposed to marine environment depends mainly on the ability of concrete to resist to\\u000a chloride ingress. This complex phenomenon depends on many parameters related to the concrete properties and to the micro-environmental\\u000a characteristics. This paper presents the results of an experimental study where fifty four 1.0×0.5×0.12 m concrete panels\\u000a were exposed to marine environment for

  2. Gaussian Laws for the Main Parameters of the Euclid Algorithms

    Microsoft Academic Search

    Loïck Lhote; Brigitte Vallée

    2008-01-01

    We provide sharp estimates for the probabilistic behaviour of the main parameters of the Euclid Algorithms, both on polynomials and on integer numbers. We study in particular the distribution of the bit-complexity which involves two main parameters : digit-costs and length of remainders. We first show here that an asymptotic gaussian law holds for the length of remainders at a

  3. Parameters affecting biological phosphate removal from wastewaters.

    PubMed

    Mulkerrins, D; Dobson, A D W; Colleran, E

    2004-04-01

    This paper reviews some of the key wastewater composition parameters, which influence the biological removal of phosphate from wastewaters, such as COD content, volatile fatty acid (VFA) content, cation concentration, phosphorus load, pH and food to microorganism ratio. The discussion also focuses on operational parameters affecting successful nutrient removal in wastewater treatment plants, such as temperature, sludge quality, sludge settlement, dissolved oxygen (DO) concentration, anaerobic P-release and secondary P-release. The aim of this review is to compile an updated document for researchers and operators of biological nutrient removal (BNR) systems. In addition, the article will provide a good foundation for readers with no prior knowledge of the process. PMID:14749113

  4. Parameters affecting seat belt use in Greece.

    PubMed

    Yannis, G; Laiou, A; Vardaki, S; Papadimitriou, E; Dragomanovits, A; Kanellaidis, G

    2011-09-01

    The objective of this research is the exploration of seat belt use in Greece and particularly the identification of the parameters affecting seat belt use in Greece. A national field survey was conducted for the analytical recording of seat belt use. A binary logistic regression model was developed, and the impact of each parameter on seat belt use in Greece was quantified. Parameters included in the model concern characteristics of car occupants (gender, age and position in the car), the type of the car and the type of the road network. The data collection revealed that in Greece, the non-use of seat belt on the urban road network was higher than on the national and rural road network and young and older men use seat belts the least. The developed model showed that travelling on a national road is negative for not wearing the seat belt. Finally, the variable with the highest impact on not wearing a seat belt is being a passenger on the back seats. PMID:21452095

  5. Parameters affecting the ampacity of HVDC submarine power cables

    Microsoft Academic Search

    Redy Mardiana

    2011-01-01

    This paper explains some parameters that affect the ampacity of HVDC submarine power cables. The parameters include ambient temperature, burial depth, and spacing distance between two cables. The analytical computation of cable ampacity is carried out in steady-state conditions. Internal, external, and mutual thermal resistances of power cables are taken into account in the calculation. The ampacity calculation is applied

  6. Parameters affecting greywater quality and its safety for reuse.

    PubMed

    Maimon, Adi; Friedler, Eran; Gross, Amit

    2014-07-15

    Reusing greywater (GW) for on-site irrigation is becoming a common practice worldwide. Alongside its benefits, GW reuse might pose health and environmental risks. The current study assesses the risks associated with on-site GW reuse and the main factors affecting them. GW from 34 households in Israel was analyzed for physicochemical parameters, Escherichia coli (as an indicator for rotavirus), Pseudomonas aeruginosa and Staphylococcus aureus. Each participating household filled out a questionnaire about their GW sources, treatment and usages. Quantitative microbial risk assessment (QMRA) was performed based on the measured microbial quality, and on exposure scenarios derived from the questionnaires and literature data. The type of treatment was found to have a significant effect on the quality of the treated GW. The average E. coli counts in GW (which exclude kitchen effluent) treated by professionally-designed system resulted in acceptable risk under all exposure scenarios while the risk from inadequately-treated GW was above the accepted level as set by the WHO. In conclusion, safe GW reuse requires a suitable and well-designed treatment system. A risk-assessment approach should be used to adjust the current regulations/guidelines and to assess the performance of GW treatment and reuse systems. PMID:24751591

  7. Main parameters of the mechanical properties of human vertebrae

    Microsoft Academic Search

    Y. M. Anikin; A. S. Obysov

    1979-01-01

    In our experiments the correlation coefficient between the tensile strength parameter and the mobility of the vertebrae was found to be equal to 0.92. From a biomechanical standpoint, the support for the human spine is a part of the sacral region where the center of gravity of the body is located, in the same way as the support for the

  8. Measurements of the main parameters of the RT70 antenna

    Microsoft Academic Search

    A. M. Aslanyan; A. G. Gulyan; A. N. Kozlov; V. B. Tarasov; R. M. Martirosyan; V. A. Grishmanovskii; B. G. Sergeev

    1984-01-01

    The main electrical characteristics of the RT-70 antenna at wavelengths of 3, 5, 6, and 40 cm were measured by radio-astronomical methods. Analytical expressions for the antenna charateristics as a function of elevation are found from the measurement results and by the method of least squares. Good agreement is obtained between the results of the experimental research and theoretical calculations.

  9. Measurement of the main parameters of the RT70 antenna

    Microsoft Academic Search

    A. M. Aslanian; A. G. Gulian; A. N. Kozlov; V. B. Tarasov; R. M. Martirosian; V. A. Grishmanovskii; B. G. Sergeev

    1984-01-01

    Measurements of the main electrical characteristics of the RT-70 radio-telescope antenna (a two-reflector quasi-parabolic Gregory system) were made at wavelengths of 3, 5, 6, and 40 cm using a radio-astronomical technique. Expressions for the elevation-angle dependences of the antenna characteristics are obtained on the basis of the least squares method. Good agreement between experimental and theoretical results is shown. Gravitational

  10. A review of the meteorological parameters which affect aerial application

    NASA Technical Reports Server (NTRS)

    Christensen, L. S.; Frost, W.

    1979-01-01

    The ambient wind field and temperature gradient were found to be the most important parameters. Investigation results indicated that the majority of meteorological parameters affecting dispersion were interdependent and the exact mechanism by which these factors influence the particle dispersion was largely unknown. The types and approximately ranges of instrumented capabilities for a systematic study of the significant meteorological parameters influencing aerial applications were defined. Current mathematical dispersion models were also briefly reviewed. Unfortunately, a rigorous dispersion model which could be applied to aerial application was not available.

  11. Performance parameters for managment of AAR-affected structures

    SciTech Connect

    Charlwood, R.G. [Acres International Limited, Niagara Falls, Ontario (Canada)

    1995-12-31

    The objective of the paper is to present a framework for the application of {open_quotes}Performance Parameters{close_quotes} for the long-term management of existing AAR-affected dams and hydroelectric plants as a basis for discussion in the workshop on dam safety issues. In this paper, references are made to various cases and the reader is referred to the companion paper for supporting information. The concept of {open_quotes}Performance Parameters{close_quotes} is being introduced by USBR as part of their dam safety program development. The focus is on dam safety related issues and parameter development starts with identification of failure modes of a dam, key performance parameters, and then progresses into definition of instrumentation and monitoring systems and potential action plans. Dam safety deficiencies and powerplant operational problems have been identified in several dams around the world and structural modifications either implemented or planned. In others, where slow (ASSR) or indefinitely continuing reactions (with {open_quotes}auto-generation{close_quotes} of alkalis) are occurring, it is necessary to plan a suitable monitoring and long management program which addresses the apparently {open_quotes}mild{close_quotes} degree of the problem but addresses the future potential in a realistic but not overly pessimistic manner. {open_quotes}Generic{close_quotes} performance parameters to address AAR effects based on a review of cases are proposed here as a possible guide to site specific development in actual cases. These are extended from the USBR scope in two respects: firstly, to include dam, spillway and plant operational issues, and secondly, into two levels of detail and effort. This discussion will be primarily a review of failure modes and key parameters. Techniques for forecasting and monitoring these parameters in an AAR environment are briefly reviewed.

  12. Parameters affecting the fate of metals in various soils 

    E-print Network

    Covar, Andrew Prescott

    1975-01-01

    Parameters Affecting the Fate of Metals in Various Soils. (December 1975) Andrew Prescott Covar, B. S. , University of Texas at E1 Paso Chairman of Advisory Committee: Dr. Calvin Woods In this study, the fate of cadmium, copper, lead, nickel, and zinc... DETERMINATION OF WATER SOLUBLE, EXCHANGEABLE, ORGANIC BOUND, AND MINERAL ASSOCIATED METALS ? SPLIT I I PAGE 18 19 3 CADMIUM UPTAKE BY SOIL TYPE 4 COPPER UPTAKE BY SOIL TYPE 5 LEAD UPTAKE BY SOIL TYPE 6 NICKEL UPTAKE BY SOIL TYPE 7 ZINC UPTAKE BY SOIL...

  13. [Aerodynamic parameters and their affecting factors over Panjin reed wetland].

    PubMed

    He, Qi-Jin; Zhou, Guang-Sheng; Zhou, Li; Wang, Yun-Long

    2008-03-01

    Based on the observation data from eddy covariance tower and meteorological gradient tower in Panjin reed wetland observation plot, and by the method combined eddy covariance with microclimate gradient observation, two fundamental aerodynamic parameters, i. e., zero-plane displacement (d) and roughness length (z0), were evaluated, with their affecting factors analyzed. The results showed that the method adopted was suitable for estimating the aerodynamic parameters. There existed obvious seasonal variations in d and z0, with the maximum (1.85 and 0.24 m) in September and the minimum (0.02 and 0.03 m) in December, respectively. The seasonal variations were closely related to vegetation characteristics, plant height (h) and leaf area index (LAI). There was a close linear relationship between d and h, and a conic relationship between z0 and h. Both d/h and d/z0 had power relationships with LAI, and the R2 values were 0.99 and 0.78, respectively. PMID:18533513

  14. Moderating role of marital quality in older adults' depressed affect: beyond the main-effects model.

    PubMed

    Bookwala, Jamila; Franks, Melissa M

    2005-11-01

    We examine the role of three indicators of marital quality (marital disagreement, marital happiness, and time spent together) as moderators of the association between physical disability and depressed affect among married older individuals (N=1,044). We found support for the moderating role of marital disagreement wherein the detrimental effect of disability on depressed affect was significantly heightened among older adults with more disagreements with their spouse; a moderating effect was not detected for marital happiness or time spent together. We conclude that, in addition to its main effect on older adults' depressed affect, marital quality (as indicated by marital disagreement) plays a significant stress-moderating role in the physical disability-depressed affect link. PMID:16260709

  15. Discussions on the main parameters of THz photoconductive antennas as emitters

    Microsoft Academic Search

    Neda Khiabani; Yi Huang; Yao-chun Shen

    2011-01-01

    The main parameters of terahertz (THz) photoconductive (PC) antennas, when employed as emitters in THz pulsed systems, have been reviewed and discussed with the emphasis on the THz output power and optical-THz conversion efficiency. The discussion is supported by the results from many published papers and the conclusion is drawn on a simplified block diagram which shows the role of

  16. [Sizes of soil macropores and related main affecting factors on a vegetated basalt slope].

    PubMed

    Guan, Qi; Xu, Ze-Min; Tian, Lin

    2013-10-01

    The landslide on vegetated slopes caused by extreme weather has being increased steadily, and the preferential flow in soil macropores plays an important role in the landslide. By using water breakthrough curve and Poiseuille equation, this paper estimated the radius range, amount, and average volume of soil macropores on a vegetated basalt slope of Maka Mountain, Southwest China, and analyzed the distribution of the soil macropores and the main affecting factors. In the study area, the radius of soil macropores ranged from 0.3 to 1.8 mm, mainly between 0.5 and 1.2 mm. The large-radius macropores (1.4-1.8 mm) were lesser, while the small-radius macropores (< 1.4 mm) were more. With the development of soil profile, soil macropores were more in upper layers and lesser in deeper layers. The average volume of the macropores contributed 84.7% to the variance of steady effluent rate. Among the factors affecting the average volume of the large macropores, vegetations root mass had a linear relationship, with the correlation coefficient being 0.70, and soil organic matter content also had a linear relationship, with the correlation coefficient being 0.64. PMID:24483084

  17. Nozzle parameters affecting vortex tube energy separation performance

    NASA Astrophysics Data System (ADS)

    Hamdan, Mohammad O.; Alsayyed, Basel; Elnajjar, Emad

    2013-04-01

    This experimental study reports the effect of nozzle parameters on the energy separation of the vortex tube. The results indicate that maximum energy separation is achieved with tangential nozzle orientation while the symmetry/asymmetry of nozzles has a minimal effect on the performance of the energy separation. For current selected conditions and parameters, the study shows that the optimum number of nozzles for maximum energy separation is around 4 nozzles.

  18. Nanofiber diameter as a critical parameter affecting skin cell response.

    PubMed

    Pelipenko, Jan; Kocbek, Petra; Kristl, Julijana

    2014-10-01

    Electrospun polymer nanofibers have opened new opportunities in the rapidly evolving field of tissue engineering, particularly due to their topography and variability of available biomaterials. In order to better understand nanofiber influence on cell growth, the impact of their diameter was systematically examined. In this study homogenous, randomly oriented poly(vinyl alcohol) nanofibers with five different average diameters, ranging from 70nm to 1120nm, were produced, characterized and their impact on morphology, proliferation and mobility of keratinocytes and skin fibroblasts was evaluated. The results have shown that nanofiber diameter affects cell response and that this response is cell line specific. Nanofiber thickness affected size, morphology and actine organization of keratinocytes much more than fibroblasts. Specifically, the keratinocyte grown on nanofibers were more spherical and smaller compared to the control cells, while the fibroblasts were much less affect. They stayed almost unchanged and spread across growth surface. The cell proliferation determined based on their metabolic activity was the highest, when keratinocytes were grown on 305nm thick nanofibers, whereas proliferation of fibroblasts grown similar nanofibers was decreased. Finally, fibroblasts exerted higher mobility than keratinocytes. Both tested cell lines on nanofiber diameters of 300nm resulted in decreased cell mobility. These findings suggest that the control over nanofiber diameter offers promising possibility to better design the tissue scaffolds, since cells distinguish between differently sized nanofibers and respond accordingly. PMID:25301202

  19. Diazinon toxicity affects histophysiological and biochemical parameters in rabbits

    Microsoft Academic Search

    Mona A. H. Yehia; Sabah G. El-Banna; Aly B. Okab

    2007-01-01

    Diazinon is a widely used pesticide in agriculture. So, the current work aimed to investigate the effects of diazinon exposure on some physiological and biochemical parameters, as well as, histopathological changes and histochemical acetyl-cholinesterase activity (AChE). The red Baladi rabbits were dipped into water (Control Group), diazinon at low concentrations of 0.6mg diazinon low concentration (DLC) or high concentration of

  20. Does Methylphenidate Affect Cystometric Parameters in Spontaneously Hypertensive Rats?

    PubMed Central

    Kim, Khae Hawn; Jung, Ha Bum; Choi, Don Kyoung; Park, Geun Ho; Cho, Sung Tae

    2015-01-01

    Purpose: Methylphenidate (MPH) is one of the most commonly prescribed psychostimulants for attention deficit hyperactivity disorder (ADHD). However, there is limited research on its effects on lower urinary tract function. This study investigated changes in cystometric parameters after intragastric administration of MPH in conscious spontaneously hypertensive rats (SHRs), an animal model of ADHD. Methods: Fourteen- to 16-week-old male SHRs (n=10), weighing between 280 and 315 g, were used. Three micturition cycles were recorded before administering MPH. One hour after each intragastric MPH injection, three cycles of cystometrogram were obtained in the awake condition. Various cystometric parameters were evaluated, including basal pressure (BP), maximal pressure (MP), threshold pressure (TP), bladder capacity (BC), micturition volume (MV), micturition interval (MI), and residual volume (RV). The data were analyzed using paired Student t-tests. Results: Five SHRs were each administered a dose of 3-mg/kg MPH, and the other five received a dose of 6-mg/kg MPH. BP and MP increased significantly in the rats that received the 3-mg/kg MPH injection, but not in those that received the 6-mg/kg injection. BC, MV, and MI significantly increased in the rats that received the 6-mg/kg MPH injection, but not in those that received the 3-mg/kg injection. There were no significant changes in TP after either injection. Conclusions: Significant increases in BC, MV, and MI after the 6-mg/kg MPH injection suggest that the peripheral and the central nervous systems may play important roles in bladder function in those receiving MPH for ADHD. PMID:26126435

  1. Regression analysis of technical parameters affecting nuclear power plant performances

    SciTech Connect

    Ghazy, R.; Ricotti, M. E.; Trueco, P. [Politecnico di Milano, Via La Masa, 34, 20156 Milano (Italy)

    2012-07-01

    Since the 80's many studies have been conducted in order to explicate good and bad performances of commercial nuclear power plants (NPPs), but yet no defined correlation has been found out to be totally representative of plant operational experience. In early works, data availability and the number of operating power stations were both limited; therefore, results showed that specific technical characteristics of NPPs were supposed to be the main causal factors for successful plant operation. Although these aspects keep on assuming a significant role, later studies and observations showed that other factors concerning management and organization of the plant could instead be predominant comparing utilities operational and economic results. Utility quality, in a word, can be used to summarize all the managerial and operational aspects that seem to be effective in determining plant performance. In this paper operational data of a consistent sample of commercial nuclear power stations, out of the total 433 operating NPPs, are analyzed, mainly focusing on the last decade operational experience. The sample consists of PWR and BWR technology, operated by utilities located in different countries, including U.S. (Japan)) (France)) (Germany)) and Finland. Multivariate regression is performed using Unit Capability Factor (UCF) as the dependent variable; this factor reflects indeed the effectiveness of plant programs and practices in maximizing the available electrical generation and consequently provides an overall indication of how well plants are operated and maintained. Aspects that may not be real causal factors but which can have a consistent impact on the UCF, as technology design, supplier, size and age, are included in the analysis as independent variables. (authors)

  2. Main Parameters of Ilc-Tevatron Based Lepton-Hadron and Photon-Hadron Colliders

    E-print Network

    O. Cakir; A. K. Ciftci; E. Recepoglu; S. Sultansoy; O. Yavas

    2005-08-09

    The construction of the ILC tangential to Tevatron ring will give opportunity to investigate electron-proton, positron-proton, electron-antiproton, positron-antiproton interactions at 1 TeV center of mass energy. The analysis of the lepton-hadron collisions in these energy region is very important both for understanding of strong interaction dynamics and for adequate interpretation of future LHC and VLHC data. In addition, ILC-Tevatron collider will provide a possibility to realize photon-hadron collisions in the same energy region using Compton backscattered laser photon off ILC electron beam. Main parameters of these colliders are estimated and their physics search potential is briefly discussed.

  3. Climate Change-Related Hydrologic Variation Affects Dissolved Organic Carbon Export to the Gulf of Maine

    NASA Astrophysics Data System (ADS)

    Huntington, T. G.; Balch, W. M.; Aiken, G.; Butler, K. D.; Billmire, M.; Roesler, C. S.; Camill, P.; Bourakovsky, A.

    2014-12-01

    Ongoing climate change is affecting the timing and amount of dissolved organic carbon (DOC) exported to the Gulf of Maine (GoM) through effects on hydrologic conditions. Climate warming in the northeast United States has resulted in decreases in snowfall amount and increases in the proportion of annual precipitation that falls as rain compared with snow. Warming has resulted in an increase in runoff during winter and earlier snowmelt and associated high spring flow. Increases in annual precipitation have resulted in increases in annual runoff. Increases in flashiness in some rivers have resulted in higher variability in daily runoff. DOC fluxes were estimated for water years 1950 through 2012 in eight rivers draining to the GoM that had long-term discharge data and data for DOC during all months of the year. These estimates used LOADEST to fit a seasonally-adjusted concentration - discharge relation. The adjusted maximum likelihood estimation (AMLE) method was used to estimate loads. One of several predefined regression models evaluated in LOADEST was selected based on the Akaike information criterion (AIC) for each river. This analysis assumed stationarity in the concentration - discharge relations. The proportion of total annual DOC exported during winter has increased. The proportion of DOC exported during March and April has also increased and the proportion exported during May has decreased in association with earlier snowmelt runoff and earlier recession to summer low flow. The total annual DOC exported by these rivers increased significantly from 1950 to 2012. The increase in flashiness has increased daily variability in DOC export in some rivers. Changes in the timing and amount of DOC exported to the near coastal ocean may influence marine biogeochemistry including the development of nuisance and harmful algal blooms, carbon sequestration, and the interpretation of satellite-derived ocean color. Terrestrially derived DOC exported to the marine environment could decrease phytoplankton productivity through light attenuation.

  4. Analysis of main parameters affecting substrate/mortar contact area through tridimensional laser scanner.

    PubMed

    Stolz, Carina M; Masuero, Angela B

    2015-10-01

    This study assesses the influence of the granulometric composition of sand, application energy and the superficial tension of substrates on the contact area of rendering mortars. Three substrates with distinct wetting behaviors were selected and mortars were prepared with different sand compositions. Characterization tests were performed on fresh and hardened mortars, as well as the rheological characterization. Mortars were applied to substrates with two different energies. The interfacial area was then digitized with 3D scanner. Results show that variables are all of influence on the interfacial contact in the development area. Furthermore, 3D laser scanning proved to be a good method to contact area measurement. PMID:26046982

  5. Parameters affecting production and character of an extrusion texturized protein product from defatted glandless cottonseed meal 

    E-print Network

    Taranto, Michael Vincent

    1974-01-01

    PARAMETERS AFFECTING PRODUCTION AND CHARACTFR OF AN EXTRUSION TEXTURIZED PROTEIN PRODUCT FROM DEFATTED GLANDLESS COTTONSEED MEAL A Thesis by MICHAEL UINCENT TARANTO Submitted to the Graduate College of Texas A&M University in partial... fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1974 Major Subject: Food Technology PARAMETERS AFFECTING PRODUCTION AND CHARACTER OF AN EXTRUSION TEXTURIZED PROTEIN PRODUCT FROM DEFATTFD GLANDLESS COTTONSEED MEAL A Thesis...

  6. Surgical treatment of Crohn's disease affecting mainly or entirely the large bowel

    Microsoft Academic Search

    J. C. Goligher

    1988-01-01

    The measures available for the elective or emergency surgical treatment of Crohn's disease confined mainly or entirely to the large intestine are surveyed in the light of the author's personal experience in the management of 250 cases, followed up since operation for a mean period of 5 years (range, 7–25 yr).

  7. The Maine Question: How Is 4-Year College Enrollment Affected by Mandatory College Entrance Exams?

    ERIC Educational Resources Information Center

    Hurwitz, Michael; Smith, Jonathan; Niu, Sunny; Howell, Jessica

    2015-01-01

    We use a difference-in-differences analytic approach to estimate postsecondary consequences from Maine's mandate that all public school juniors take the SAT®. We find that, overall, the policy increased 4-year college-going rates by 2- to 3-percentage points and that 4-year college-going rates among induced students increased by 10-percentage…

  8. Factors affecting wear damage to elastomer seals in main coolant pump face seals. Final report

    Microsoft Academic Search

    Wensel

    1985-01-01

    Results are presented from laboratory tests on main coolant pump seals conducted using a test rig having controlled tile of the non-flexibility mounted seal ring, which resulted in elastomer seal damage identical to that occurring to pump seal elastomers in nuclear station service. Results from contact profile and leakage rate studies on damaged seals from these and from other tests

  9. The spectrum of left main coronary artery disease: variables affecting patient selection, management, and death.

    PubMed

    Jones, E L; King, S B; Craver, J M; Douglas, J S; Kaplan, J A; Morgan, E A; Brown, E M; Bradford, J M; Hatcher, C R

    1980-01-01

    A total of 178 patients having a diagnosis of left main coronary artery stenosis were divided into three groups as follows: surgical, Group I (n = 135 patients); operable medically treated, Group II (n = 21 patients); and inoperable, Group III (n = 22 patients). Groups 1 and 2 were comparable with regard to clinical profile, extent of anatomic coronary disease, and left ventricular function. Inoperable patients had a much higher incidence of prior myocardial infarction (especially anterior), more severe distal coronary disease, and markedly depressed left ventricular function. The hospital mortality rate for surgical patients was 4% (6/135). The late mortality rate, (median follow-up = 23.4 months) was 7% (9/135). For operable patients, the late mortality rate was 43% (9/21) at 28 months. In the inoperable group, the late death rate at 20 months was 59% (13/22). Actuarial survival at 24 months for the three groups was: 88%, 66%, and 42%, respectively. Of the nine patients who died in the operable group, two had less than 75% obstruction of the left main coronary artery and two had normal left ventricular wall motion. Although patients with higher grades of left main coronary artery stenosis and reduced left ventricular function are at greater risk, patients with less obstruction and good left ventricular function are also at risk and should have myocardial revascularization with some sense of urgency. The population of left main coronary artery stenosis is a heterogeneous one, and comparison of surgical versus medical therapy should exclude inoperable patients. The operative mortality rate has been greatly reduced in recent years (2% in the last 100 cases); this is attributed to careful monitoring in the critical prebypass period, aggressive pharmacologic treatment of increased preload, tachycardia, and hypertension, and improved aurgical technique, with emphasis on careful myocardial preservation. Adherence to these principles makes frequent use of the intra-aortic balloon either before or after revascularization unnecessary. PMID:6765978

  10. Alterations in coagulation parameters in dairy cows affected with acute mastitis caused by E. coli and S. aureus pathogens

    Microsoft Academic Search

    Zuhair A. Bani Ismail; Charles Dickinson

    2010-01-01

    This study was conducted to evaluate alterations in coagulation parameters in dairy cows affected with acute Escherichia coli (E. coli) mastitis and to compare those values to cows affected with Staphylococcus aureus (S. aureus ) mastitis. Twenty-four, adult Holstein-Friesian dairy cows affected with acute E. coli mastitis and 17 cows affected with S. aureus mastitis were studied. Cows affected with

  11. Measures of GCM Performance as Functions of Model Parameters Affecting Clouds and Radiation

    NASA Astrophysics Data System (ADS)

    Jackson, C.; Mu, Q.; Sen, M.; Stoffa, P.

    2002-05-01

    This abstract is one of three related presentations at this meeting dealing with several issues surrounding optimal parameter and uncertainty estimation of model predictions of climate. Uncertainty in model predictions of climate depends in part on the uncertainty produced by model approximations or parameterizations of unresolved physics. Evaluating these uncertainties is computationally expensive because one needs to evaluate how arbitrary choices for any given combination of model parameters affects model performance. Because the computational effort grows exponentially with the number of parameters being investigated, it is important to choose parameters carefully. Evaluating whether a parameter is worth investigating depends on two considerations: 1) does reasonable choices of parameter values produce a large range in model response relative to observational uncertainty? and 2) does the model response depend non-linearly on various combinations of model parameters? We have decided to narrow our attention to selecting parameters that affect clouds and radiation, as it is likely that these parameters will dominate uncertainties in model predictions of future climate. We present preliminary results of ~20 to 30 AMIPII style climate model integrations using NCAR's CCM3.10 that show model performance as functions of individual parameters controlling 1) critical relative humidity for cloud formation (RHMIN), and 2) boundary layer critical Richardson number (RICR). We also explore various definitions of model performance that include some or all observational data sources (surface air temperature and pressure, meridional and zonal winds, clouds, long and short-wave cloud forcings, etc...) and evaluate in a few select cases whether the model's response depends non-linearly on the parameter values we have selected.

  12. Thymoquinone, the main constituent of Nigella sativa, affects adenosine receptors in asthmatic guinea pigs

    PubMed Central

    Pejman, Laleh; Omrani, Hasan; Mirzamohammadi, Zahra; Keyhanmanesh, Rana

    2014-01-01

    Objective(s): For determining the mechanism of anti-asthmatic effect of thymoquinone, this investigation evaluated the effect of thymoquinone in the presence of selective A2A and A2B adenosine receptor antagonists (ZM241385 and MRS1706, respectively). Materials and Methods: Seventy guinea pigs were randomly divided to 7 groups; control (C), sensitized with ovalbumin (S), sensitized groups pretreated with thymoquinone (S+TQ), ZM241385 (S+Anta A2A), MRS1706 (S+Anta A2B), thymoquinone and antagonists (S+Anta A2A+TQ and S+Anta A2B+TQ). Thymoquinone and each of these antagonists with 3 mg/kg dose were injected i.p. on 10th day of sensitization protocol. Tracheal responsiveness (TR) to methacholine and ovalbumin (OA), and total and differential cell count in lung lavage fluid (LLF) in different groups were measured. Results: Increased EC50 and LLF neutrophil count and decreased TR to methacholine and OA, LLF eosinophil and basophil counts were observed in S+TQ group compared to S group (P<0.001 to P<0.05). Significant decrease in EC50 (P<0.01), LLF neutrophil, lymphocyte and monocyte count (P<0.001 for all) and significant increase in TR to OA (P<0.01), LLF total WBC (P<0.01) and eosinophil count (P<0.001) were observed in S+A2A group compared to S+TQ group. There was significant increase in LLF eosinophil and monocyte counts in S+Anta A2B group compared with S+TQ group (P<0.001 for both). In S+TQ+Anta A2A group, there was significant increase in LLF eosinophil (P<0.001) and significant decrease in LLF neutrophil (P<0.01) and monocyte (P<0.001) counts compared with S+TQ group. Conclusion: Thymoquinone affects adenosine receptors, which suggest that some of its anti-inflammatory effects may be mediated by these receptors. PMID:25859306

  13. Neck Muscle Paths and Moment Arms are Significantly Affected by Wrapping Surface Parameters

    E-print Network

    Krishnamoorthy, Bala

    Neck Muscle Paths and Moment Arms are Significantly Affected by Wrapping Surface Parameters.S.A. *Corresponding author. Email: vasavada@wsu.edu We have studied the effects of wrapping surfaces on muscle paths and moment arms of the semispinalis capitis muscle, one of the major extensors of the neck. Sensitivities

  14. MAIN PARAMETERS ON THE PERFORMANCE OF A DESULFURIZATION OF FERRONICKEL BY SLAG REACTION

    Microsoft Academic Search

    M. Hochenhofer; H. Antrekowitsch; M. Juhart

    To produce ferroalloys like ferro-nickel for alloying purposes in a quality that meets the requirements of today's steel industry, refining processes like desulfurization and dephosphorization are indispensable. The performance of desulfurization-treatment by slag reaction depends on various parameters, such as: sulfide capacity and viscosity of the slag, sulfur distribution between metal and slag, activity of sulfur in melt and movement

  15. Injection parameters affect cell viability and implant volumes in automated cell delivery for the brain.

    PubMed

    Kondziolka, Douglas; Gobbel, Glenn T; Fellows-Mayle, Wendy; Chang, Yue-Fang; Uram, Martin

    2011-01-01

    The technique of central nervous system cell implantation can affect the outcome of preclinical or clinical studies. Our goal was to evaluate the impact of various injection parameters that may be of consequence during the delivery of solute-suspended cells. These parameters included (1) the type and concentration of cells used for implantation, (2) the rate at which cells are injected (flow rate), (3) the acceleration of the delivery device, (4) the period of time between cell loading and injection into the CNS (delay), and (5) the length and gauge of the needle used to deliver the cells. Neural progenitor cells (NPCs) and bone marrow stromal cells (BMSCs) were injected an automated device. These parameters were assessed in relation to their effect on the volume of cells injected and cell viability. Longer and thinner cannulae and higher cell concentrations were detrimental for cell delivery. Devices and techniques that optimize these parameters should be of benefit. PMID:21457614

  16. The variation in molecular gas depletion time among nearby galaxies: what are the main parameter dependences?

    NASA Astrophysics Data System (ADS)

    Huang, Mei-Ling; Kauffmann, Guinevere

    2014-09-01

    We re-analyse correlations between global molecular gas depletion time (tdep) and galaxy parameters for nearby galaxies from the COLD GASS survey. We improve on previous work of Saintonge et al. by estimating star formation rates using the combination of Galaxy Evolution Explorer far-ultraviolet and Wide-field Infrared Survey Explorer 22 ?m data and by deriving tdep within a fixed aperture set by the beam size of gas observation. In our new study, we find correlations with much smaller scatter. Dependences of the depletion time on galaxy structural parameters such as stellar surface density and concentration index are now weak or absent. We demonstrate that the primary global parameter correlation is between tdep and specific star formation rate (sSFR); all other remaining correlations can be shown to be induced by this primary dependence. This implies that galaxies with high current-to-past-averaged star formation activity, will drain their molecular gas reservoir sooner. We then analyse tdep on 1 kpc scales in galactic discs using data from the HERA CO-Line Extragalactic Survey survey. There is remarkably good agreement between the global tdep-sSFR relation for the COLD GASS galaxies and that derived for 1 kpc scale grids in discs. This leads to the conclusion that the local molecular gas depletion time in galactic discs is dependent on the local fraction of young-to-old stars.

  17. The modern instrumentation used for monitoring and controlling the main parameters of the regenerative electro-mechano-hydraulic drive systems

    NASA Astrophysics Data System (ADS)

    Cristescu, Corneliu; Drumea, Petrin; Krevey, Petrica

    2009-01-01

    In this work is presented the modern instrumentation used for monitoring and controlling the main parameters for one regenerative drive system, used to recovering the kinetic energy of motor vehicles, lost in the braking phase, storing and using this energy in the starting or accelerating phases. Is presented a Romanian technical solution for a regenerative driving system, based on a hybrid solution containing a hydro-mechanic module and an existing thermal motor drive, all conceived as a mechatronics system. In order to monitoring and controlling the evolution of the main parameters, the system contains a series of sensors and transducers that provide the moment, rotation, temperature, flow and pressure values. The main sensors and transducers of the regenerative drive system, their principal features and tehnical conecting solutions are presented in this paper, both with the menaging electronic and informational subsystems.

  18. Chronic consumption of alcohol and sperm parameters: our experience and the main evidences.

    PubMed

    Condorelli, R A; Calogero, A E; Vicari, E; La Vignera, S

    2015-05-01

    The present article describes the recent clinical experience and the main clinical and experimental evidences on this topic. In the first part, we present retrospective data collected over the last year on the semen quality and hormonal characteristics of the alcohol consumers evaluated in our centre. In the second part, we describe the mechanisms by which chronic alcohol intoxication impairs the testicular function (evidences for an ethanol-mediated effect at pre-testicular/testicular and post-testicular level). In the third part, we present data on ethanol taken a male risk factor of infertility, being present as one among other recreational drugs (also called lifestyle). Finally, is discussed the role of individual susceptibility factors and other variables. PMID:24766499

  19. Transfecting mammalian cells: optimization of critical parameters affecting calcium-phosphate precipitate formation

    Microsoft Academic Search

    Martin Jordan; Annette Schallhorn; Florian M. Wurm

    1996-01-01

    DNA-calcium phosphate co-precipitates arise spontaneously in supersaturated solutions. Highly effective precipitates for transfection purposes, however, can be generated only in a very narrow range of physico-chemical conditions that control the initiation and growth of precipitate complexes. The concentrations of calcium and phosphate are the main factors influencing characteristics of the precipitate complex, but other parameters, such as temperature, DNA concentration

  20. Main Parameters of Soil Quality and it's Management Under Changing Climate

    NASA Astrophysics Data System (ADS)

    László Phd, M., ,, Dr.

    2009-04-01

    Reviewing Paper Introduction: Malcolm summarised the topic of soil quality and it's management in a well synthetized form in 2000. So, the soils are fundamental to the well-being and productivity of agricultural and natural ecosystems. Soil quality is a concept being developed to characterize the usefulness and health of soils. Soil quality includes soil fertility, potential productivity, contaminant levels and their effects, resource sustainability and environmental quality. A general definition of soil quality is the degree of fitness of a soil for a specific use. The existence of multiple definitions suggests that the soil quality concept continues to evolve (Kádár, 1992; Várallyay, 1992, 1994, 2005; Németh, 1996; Malcolm, 2000; Márton, 2005; Márton et al. 2007). Recent attention has focused on the sustainability of human uses of soil, based on concerns that soil quality may be declining (Boehn and Anderson, 1997). We use sustainable to mean that a use or management of soil will sustain human well-being over time. Lal (1995) described the land resources of the world (of which soil is one component) as "finite, fragile, and nonrenewable," and reported that only about 22% (3.26 billion ha) of the total land area on the globe is suitable for cultivation and at present, only about 3% (450 million ha) has a high agricultural production capacity. Because soil is in large but finite supply, and some soil components cannot be renewed within a human time frame, the condition of soils in agriculture and the environment is an issue of global concern (Howard, 1993; FAO, 1997). Concerns include soil losses from erosion, maintaining agricultural productivity and system sustainability, protecting natural areas, and adverse effects of soil contamination on human health (Haberern, 1992; Howard, 1993; Sims et al., 1997). Parr et al. (1992) state, "...soil degradation is the single most destructive force diminishing the world's soil resource base." Soil quality guidelines are intended to protect the ability of ecosystems to function properly (Kádár, 1992; Várallyay, 1992, 1994, 2005; Cook and Hendershot, 1996; Németh, 1996; Malcolm, 2000; Márton, 2005; Márton et al. 2007). The Hungarian Ministry of Environment and Water (HMEW, 2004) suggests that the Hungarian Regions should adopt a national policy "...that seeks to conserve and enhance soil quality...". Useful evaluation of soil quality requires agreement about why soil quality is important, how it is defined, how it should be measured, and how to respond to measurements with management, restoration, or conservation practices. Because determining soil quality requires one or more value judgments and because we have much to learn about soil, these issues are not easily addressed (Várallyay, 1992, 1994, 2005; Cook and Hendershot, 1996; Németh, 1996; Malcolm, 2000). Definitions of soil quality have been based both on human uses of soil and on the functions of soil within natural and agricultural ecosystems. For purposes of this work, we are showing soil quality within the context of managed agricultural ecosystems. To many in agriculture and agricultural research, productivity is analogous to soil quality. Maintaining soil quality is also a human health concern because air, groundwater and surface water consumed by humans can be adversely affected by mismanaged and contaminated soils, and because humans may be exposed to contaminated soils in residential areas (Kádár, 1992; Várallyay, 2005; Cook and Hendershot, 1996; Németh, 1996; Malcolm, 2000; Márton et al. 2007). Contamination may include heavy metals, toxic elements, excess nutrients, volatile and nonvolatile organics, explosives, radioactive isotopes and inhalable fibers (Sheppard et al., 1992; Cook and Hendershot, 1996). Soil quality is not determined by any single conserving or degrading process or property, and soil has both dynamic and relatively static properties that also vary spatially (Carter et al., 1997). Gregorich et al. (1994) state that "soil quality is a composite me

  1. Identifying Critical Road Geometry Parameters Affecting Crash Rate and Crash Type

    PubMed Central

    Othman, Sarbaz; Thomson, Robert; Lannér, Gunnar

    2009-01-01

    The objective of this traffic safety investigation was to find critical road parameters affecting crash rate (CR). The study was based on crash and road maintenance data from Western Sweden. More than 3000 crashes, reported from 2000 to 2005 on median-separated roads, were collected and combined with road geometric and surface data. The statistical analysis showed variations in CR when road elements changed confirming that road characteristics affect CR. The findings indicated that large radii right-turn curves were more dangerous than left curves, in particular, during lane changing manoeuvres. However sharper curves are more dangerous in both left and right curves. Moreover, motorway carriageways with no or limited shoulders have the highest CR when compared to other carriageway widths, while one lane carriageway sections on 2+1 roads were the safest. Road surface results showed that both wheel rut depth and road roughness have negative impacts on traffic safety. PMID:20184841

  2. An analysis of the meteorological parameters affecting ambient concentrations of acid aerosols in Uniontown, Pennsylvania

    NASA Astrophysics Data System (ADS)

    Zelenka, Michael P.

    Ambient concentrations of aerosol strong acidity (H +) that were collected in Uniontown, Pennsylvania, during the summer of 1990 were evaluated to determine the relationships between meteorology and the magnitude of the H + concentrations. An extensive database containing 17 meteorological parameters was compiled for the Uniontown - Pittsburgh region. The database included both surface and upper air meteorological parameters. Concentrations of ambient acid sulfate aerosols collected in Uniontown, Pennsylvania, in the summer of 1990 were greatly affected by both local and regional meteorological conditions. Seven distinct meteorological synoptic types or regimes were identified for the summer months. A clear association was shown between episodic events of elevated ambient H + concentrations and one of the regimes, referred to here as synoptic type 5, which occurred when an anticyclone set up to the east of the mid-Atlantic states. Much of the variability (approximately 45%) in H + concentrations for the overall model was explained by the surface air temperature. Approximately 10% of the H' variability was explained by westerly winds as expressed by the U components of the morning 850 mb wind and the mean daily surface wind at Uniontown. Results showed that for days under the influence of synoptic type 5, which was associated with the highest levels of ambient H', the surface temperature explained approximately one-third of the variability in H' concentrations. The height of the mixing layer also affected the variability in H + concentrations, accounting for nearly a quarter of the variance. These results show that an analysis of the surface wind speed and direction alone will not adequately explain the variability in the concentrations of ambient acid aerosols. Analyses of the meteorological parameters affecting ambient concentrations of acid aerosols should include the mixing height, as well as the temperature, wind speed, and wind direction; both at the surface and for an upper level of the atmosphere that facilitates regional transport of pollutants.

  3. Sub-clinical diseases affecting performance in Standardbred trotters: diagnostic methods and predictive parameters.

    PubMed

    Richard, Eric A; Fortier, Guillaume D; Pitel, Pierre-Hugues; Dupuis, Marie-Capucine; Valette, Jean-Paul; Art, Tatiana; Denoix, Jean-Marie; Lekeux, Pierre M; Erck, Emmanuelle Van

    2010-06-01

    The objectives of this study were to determine the prevalence of sub-clinical diseases in poorly-performing Standardbred horses, compare their physiological response to exercise with control horses, and identify predictive parameters of poor-performance. Fifty horses underwent thorough clinical and ancillary examinations, including haematological and biochemical evaluation, Doppler echocardiography, standardised exercise tests (SETs) on both treadmill and racetrack, treadmill video-endoscopy and collection of respiratory fluids. Most of the poorly-performing horses exhibited many concomitant diseases. The most frequently diagnosed problems involved the lower and upper respiratory tract and the musculoskeletal system. Poor-performers had lower speeds at a blood lactate (LA) concentration of 4mmol/L (V(LA4)) and a heart rate (HR) of 200bpm (V(200)) on treadmill and racetrack, as well as lower values for haematological parameters, plasma angiotensin-converting enzyme and antioxidants, compared to control horses. Problems of the respiratory system were the most frequently diagnosed sub-clinical diseases affecting performance. SETs, together with some blood markers, may be useful as a non-specific diagnostic tool for early detection of diseases that may affect performance. PMID:19477143

  4. In vitro exposure to the organochlorine p,p'-DDE affects functional human sperm parameters.

    PubMed

    Tavares, Renata S; Amaral, Sandra; Paiva, Carla; Baptista, Marta; Ramalho-Santos, João

    2015-02-01

    Although no information exists regarding the levels of p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE) on reproductive fluids of heavily exposed populations, they are possibly quite high given the serum levels reported so far. In these populations altered semen quality has been reported, although the direct effects of this DDT metabolite on crucial sperm parameters remain largely unexplored. With this in mind, a long-term in vitro incubation that better mimics the putative continuous exposure of spermatozoa to p,p'-DDE in the female reproductive tract in vivo was used. Before compromising sperm viability, continuous p,p'-DDE exposure remarkably decreased sperm motility, possibly due to the combined reduction in the proportion of sperm with high mitochondrial membrane potential and cellular ATP levels, all of which were clearly more affected at 50 and 100 ?M p,p'-DDE. Moreover, 25 ?M p,p'-DDE was also able to promote a decline in sperm with high MMP, however without significantly affecting motility. On the other hand, p,p'-DDE at the highest concentration strongly inhibited the process of capacitation following 24h of incubation. In conclusion, human sperm function is affected by continuous high p,p'-DDE exposure which may ultimately compromise male fertility. Given our previously findings that showed a non-regulated Ca(2+) entry in the presence of p,p'-DDE, we suggest that this organochlorine may promote mitochondrial Ca(2+) overload which may culminate in a general mitochondrial dysfunction and cellular ATP depletion, thus affecting sperm fertilizing potential. Our findings suggest a broader understanding of the non-genomic mechanism of p,p'-DDE action in human sperm. PMID:25240159

  5. Modeling of mouse eye and errors in ocular parameters affecting refractive state

    NASA Astrophysics Data System (ADS)

    Bawa, Gurinder

    Rodents eye are particularly used to study refractive error state of an eye and development of refractive eye. Genetic organization of rodents is similar to that of humans, which makes them interesting candidates to be researched upon. From rodents family mice models are encouraged over rats because of availability of genetically engineered models. Despite of extensive work that has been performed on mice and rat models, still no one is able to quantify an optical model, due to variability in the reported ocular parameters. In this Dissertation, we have extracted ocular parameters and generated schematics of eye from the raw data from School of Medicine, Detroit. In order to see how the rays would travel through an eye and the defects associated with an eye; ray tracing has been performed using ocular parameters. Finally we have systematically evaluated the contribution of various ocular parameters, such as radii of curvature of ocular surfaces, thicknesses of ocular components, and refractive indices of ocular refractive media, using variational analysis and a computational model of the rodent eye. Variational analysis revealed that variation in all the ocular parameters does affect the refractive status of the eye, but depending upon the magnitude of the impact those parameters are listed as critical or non critical. Variation in the depth of the vitreous chamber, thickness of the lens, radius of the anterior surface of the cornea, radius of the anterior surface of the lens, as well as refractive indices for the lens and vitreous, appears to have the largest impact on the refractive error and thus are categorized as critical ocular parameters. The radii of the posterior surfaces of the cornea and lens have much smaller contributions to the refractive state, while the radii of the anterior and posterior surfaces of the retina have no effect on the refractive error. These data provide the framework for further refinement of the optical models of the rat and mouse eye and suggest that extra efforts should be directed towards increasing the linear resolution of the rodent eye biometry and obtaining more accurate data for the refractive indices of the lens and vitreous.

  6. Key Parameters Affecting Quantitative Analysis of STEM-EDS Spectrum Images

    SciTech Connect

    Brewer, Luke [Sandia National Laboratories (SNL); Parish, Chad M [ORNL

    2010-06-01

    In this article, we use simulated and experimental data to explore how three operator-controllable parameters - (1) signal level, (2) detector resolution, and (3) number of factors chosen for analysis - affect quantitative analyses of scanning transmission electron microscopy-energy dispersive X-ray spectroscopy spectrum images processed by principal component analysis (PCA). We find that improvements in both signal level and detector resolution improve the precision of quantitative analyses, but that signal level is the most important. We also find that if the rank of the PCA solution is not chosen properly, it may be possible to improperly fit the underlying data and degrade the accuracy of results. Additionally, precision is degraded in the case when too many factors are included in the model.

  7. External Load Affects Ground Reaction Force Parameters Non-uniformly during Running in Weightlessness

    NASA Technical Reports Server (NTRS)

    DeWitt, John; Schaffner, Grant; Laughlin, Mitzi; Loehr, James; Hagan, R. Donald

    2004-01-01

    Long-term exposure to microgravity induces detrimefits to the musculcskdetal system (Schneider et al., 1995; LeBlanc et al., 2000). Treadmill exercise is used onboard the International Space Station as an exercise countermeasure to musculoskeletal deconditioning due to spaceflight. During locomotive exercise in weightlessness (0G), crewmembers wear a harness attached to an external loading mechanism (EL). The EL pulls the crewmember toward the treadmill, and provides resistive load during the impact and propulsive phases of gait. The resulting forces may be important in stimulating bone maintenance (Turner, 1998). The EL can be applied via a bungee and carabineer clip configuration attached to the harness and can be manipulated to create varying amounts of load levels during exercise. Ground-based research performed using a vertically mounted treadmill found that peak ground reaction forces (GRF) during running at an EL of less than one body weight (BW) are less than those that occur during running in normal gravity (1G) (Davis et al., 1996). However, it is not known how the GRF are affected by the EL in a true OG environment. Locomotion while suspended may result in biomechanics that differ from free running. The purpose of this investigation was to determine how EL affects peak impact force, peak propulsive force, loading rate, and impulse of the GRF during running in 0G. It was hypothesized that increasing EL would result in increases in each GRF parameter.

  8. Relative importance of parameters affecting wind speed prediction using artificial neural networks

    NASA Astrophysics Data System (ADS)

    Ghorbani, M. A.; Khatibi, R.; Hosseini, B.; Bilgili, M.

    2013-10-01

    In traditional artificial neural networks (ANN) models, the relative importance of the individual meteorological input variables is often overlooked. A case study is presented in this paper to model monthly wind speed values using meteorological data (air pressure, air temperature, relative humidity, and precipitation), where the study also includes an estimate of the relative importance of these variables. Recorded monthly mean data are available at a gauging site in Tabriz, Azerbaijan, Iran, for the period from 2000 to 2005, gauged in the city at the outskirt of alluvial funneling mountains with an established microclimatic conditions and a diurnal wind regime. This provides a sufficiently severe test for the ANN model with a good predictive capability of 1 year of lead time but without any direct approach to refer the predicted results to local microclimatic conditions. A method is used in this paper to calculate the relative importance of each meteorological input parameters affecting wind speed, showing that air pressure and precipitation are the most and least influential parameters with approximate values of 40 and 10 %, respectively. This gained knowledge corresponds to the local knowledge of the microclimatic and geomorphologic conditions surrounding Tabriz.

  9. Factors affecting the distribution of hydrocarbon contaminants and hydrogeochemical parameters in a shallow sand aquifer.

    PubMed

    Lee, J Y; Cheon, J Y; Lee, K K; Lee, S Y; Lee, M H

    2001-07-01

    The distributions of hydrocarbon contaminants and hydrogeochemical parameters were investigated in a shallow sand aquifer highly contaminated with petroleum hydrocarbons leaked from solvent storage tanks. For these purposes, a variety of field investigations and studies were performed, which included installation of over 100 groundwater monitoring wells and piezometers at various depths, soil logging and analyses during well and piezometer installation, chemical analysis of groundwater, pump tests, and slug tests. Continuous water level monitoring at three selected wells using automatic data-logger and manual measuring at other wells were also conducted. Based on analyses of the various investigations and tests, a number of factors were identified to explain the distribution of the hydrocarbon contaminants and hydrogeochemical parameters. These factors include indigenous biodegradation, hydrostratigraphy, preliminary pump-and-treat remedy, recharge by rainfall, and subsequent water level fluctuation. The permeable sandy layer, in which the mean water table elevation is maintained, provided a dominant pathway for contaminant transport. The preliminary pump-and-treat action accelerated the movement of the hydrocarbon contaminants and affected the redox evolution pattern. Seasonal recharge by rain, together with indigenous biodegradation, played an important role in the natural attenuation of the petroleum hydrocarbons via mixing/dilution and biodegradation. The water level fluctuations redistributed the hydrocarbon contaminants by partitioning them into the soil and groundwater. The identified factors are not independent but closely inter-correlated. PMID:11475158

  10. Microenvironmental variables must influence intrinsic phenotypic parameters of cancer stem cells to affect tumourigenicity.

    PubMed

    Scott, Jacob G; Hjelmeland, Anita B; Chinnaiyan, Prakash; Anderson, Alexander R A; Basanta, David

    2014-01-01

    Since the discovery of tumour initiating cells (TICs) in solid tumours, studies focussing on their role in cancer initiation and progression have abounded. The biological interrogation of these cells continues to yield volumes of information on their pro-tumourigenic behaviour, but actionable generalised conclusions have been scarce. Further, new information suggesting a dependence of tumour composition and growth on the microenvironment has yet to be studied theoretically. To address this point, we created a hybrid, discrete/continuous computational cellular automaton model of a generalised stem-cell driven tissue with a simple microenvironment. Using the model we explored the phenotypic traits inherent to the tumour initiating cells and the effect of the microenvironment on tissue growth. We identify the regions in phenotype parameter space where TICs are able to cause a disruption in homeostasis, leading to tissue overgrowth and tumour maintenance. As our parameters and model are non-specific, they could apply to any tissue TIC and do not assume specific genetic mutations. Targeting these phenotypic traits could represent a generalizable therapeutic strategy across cancer types. Further, we find that the microenvironmental variable does not strongly affect the outcomes, suggesting a need for direct feedback from the microenvironment onto stem-cell behaviour in future modelling endeavours. PMID:24453958

  11. Use of artificial neural networks to examine parameters affecting the immobilization of streptokinase in chitosan.

    PubMed

    Modaresi, Seyed Mohamad Sadegh; Faramarzi, Mohammad Ali; Soltani, Arash; Baharifar, Hadi; Amani, Amir

    2014-01-01

    Streptokinase is a potent fibrinolytic agent which is widely used in treatment of deep vein thrombosis (DVT), pulmonary embolism (PE) and acute myocardial infarction (MI). Major limitation of this enzyme is its short biological half-life in the blood stream. Our previous report showed that complexing streptokinase with chitosan could be a solution to overcome this limitation. The aim of this research was to establish an artificial neural networks (ANNs) model for identifying main factors influencing the loading efficiency of streptokinase, as an essential parameter determining efficacy of the enzyme. Three variables, namely, chitosan concentration, buffer pH and enzyme concentration were considered as input values and the loading efficiency was used as output. Subsequently, the experimental data were modeled and the model was validated against a set of unseen data. The developed model indicated chitosan concentration as probably the most important factor, having reverse effect on the loading efficiency. PMID:25587327

  12. Long and Short Term Variability of the Main Physical Parameters in the Coastal Area of the SE Baltic Proper

    NASA Astrophysics Data System (ADS)

    Mingelaite, Toma; Rukseniene, Viktorija; Dailidiene, Inga

    2015-04-01

    Keywords: SE Baltic Sea, coastal upwelling, IR Remote Sensing The memory of the ocean and seas of atmospheric forcing events contributes to the long-term climate change. Intensifying climate change processes in the North Atlantic region including Baltic Sea has drawn widespread interest, as a changing water temperature has ecological, economic and social impact in coastal areas of the Europe seas. In this work we analyse long and short term variability of the main physical parameters in the coastal area of the South Eastern Baltic Sea Proper. The analysis of long term variability is based on monitoring data measured in the South Eastern Baltic Sea for the last 50 years. The main focus of the long term variability is changes of hydro meteorological parameters relevant to the observed changes in the climate.The water salinity variations in the Baltic Sea near the Lithuanian coast and in the Curonian Lagoon, a shallow and enclosed sub-basin of the Baltic Sea, were analysed along with the time series of some related hydroclimatic factors. The short term water temperature and salinity variations were analysed with a strong focus on coastal upwelling events. Combining both remote sensing and in situ monitoring data physical parameters such as vertical salinity variations during upwelling events was analysed. The coastal upwelling in the SE Baltic Sea coast, depending on its scale and intensity, may lead to an intrusion of colder and saltier marine waters to the Curonian Lagoon resulting in hydrodynamic changes and pronounced temperature drop extending for 30-40 km further down the Lagoon. The study results show that increasing trends of water level, air and water temperature, and decreasing ice cover duration are related to the changes in meso-scale atmospheric circulation, and more specifically, to the changes in regional and local wind regime climate. That is in a good agreement with the increasing trends in local higher intensity of westerly winds, and with the winter NAO index that indicates the change and variations of the atmospheric circulation in the North Atlantic region, including the Baltic Sea area. This work is supported by "Lithuanian Maritime Sectors' Technologies and Environmental Research Development" project Nr. VP1-3.1-ŠMM-08-K-01-019 funded by the European Social Fund Agency.

  13. Biofilm Formation by the Fish Pathogen Flavobacterium columnare: Development and Parameters Affecting Surface Attachment

    PubMed Central

    Cai, Wenlong; De La Fuente, Leonardo

    2013-01-01

    Flavobacterium columnare is a bacterial fish pathogen that affects many freshwater species worldwide. The natural reservoir of this pathogen is unknown, but its resilience in closed aquaculture systems posits biofilm as the source of contagion for farmed fish. The objectives of this study were (i) to characterize the dynamics of biofilm formation and morphology under static and flow conditions and (ii) to evaluate the effects of temperature, pH, salinity, hardness, and carbohydrates on biofilm formation. Nineteen F. columnare strains, including representatives of all of the defined genetic groups (genomovars), were compared in this study. The structure of biofilm was characterized by light microscopy, confocal laser scanning microscopy, and scanning electron microscopy. F. columnare was able to attach to and colonize inert surfaces by producing biofilm. Surface colonization started within 6 h postinoculation, and microcolonies were observed within 24 h. Extracellular polysaccharide substances and water channels were observed in mature biofilms (24 to 48 h). A similar time course was observed when F. columnare formed biofilm in microfluidic chambers under flow conditions. The virulence potential of biofilm was confirmed by cutaneous inoculation of channel catfish fingerlings with mature biofilm. Several physicochemical parameters modulate attachment to surfaces, with the largest influence being exerted by hardness, salinity, and the presence of mannose. Maintenance of hardness and salinity values within certain ranges could prevent biofilm formation by F. columnare in aquaculture systems. PMID:23851087

  14. Postpartum repeated separation from pups affects the behavior and neuroendocrine parameters of mandarin vole fathers.

    PubMed

    Kong, Lingzhe; Wu, Ruiyong; Wang, Lu; Feng, Weige; Cao, Yan; Tai, Fadao

    2015-02-01

    Repeated separation from pups results in anxiety and depression-like behaviors in mothers. This level of attachment has also been established between fathers and pups in monogamous rodents. We hypothesized that brief and lengthy separation from their pups would affect emotion, social behavior and neuroendocrine parameters in socially monogamous male mandarin voles (Microtus mandarinus). The results indicate that brief pup separation (BPS) of 15 min/day significantly reduced the percentage of time spent in the central area, total distance and total transition in open field tests. BPS resulted in increased sniffing and self-grooming in fathers, but reduced attacking and climbing. Long pup separation (LPS) of 3h/day suppressed attacking, sniffing, no-social investigating and digging in fathers, but increased time in immobile in social interaction and forced swimming tests. LPS upregulated levels of central oxytocin (OT) and vasopressin (AVP), serum corticosterone (CORT); BPS increased central OT and serum corticosterone only. These findings show that BPS and LPS are critical stressors for fathers and alter anxiety and depression-like and social behaviors in monogamous mandarin voles. These changes in behaviors may be associated with alteration in OT, AVP and CORT. PMID:25446219

  15. Annual change in spirometric parameters among patients affected in Bhopal gas disaster: A retrospective observational study

    PubMed Central

    De, Sajal

    2013-01-01

    Background: The involvement of respiratory system due to inhalation of methyl isocyanate (MIC) during Bhopal gas disaster was particularly severe. We retrospectively evaluated the annual changes in spirometric parameters among those who were affected in this disaster (exposed survivors) and had respiratory symptoms. Materials and Methods: Spirometry reports of exposed survivors that were carried out in our institution were retrospectively reviewed and we identified 252 subjects who had performed spirometry at least twice with interval of more than one year. The annual changes in spirometric indices of them were calculated. Results: The average age of study population was 55.7 years and 72% were male. Annual decline of FEV1 ? 40 ml/yr was observed among 48% exposed survivors. The mean annual decline of FEV1 among symptomatic exposed survivors with initial normal spirometry was 91 ml (95% CI: 52 ml to 130 ml) and this was more than the patients with initial obstructive pattern. Among fifty four patients with initial normal spirometry, ten patients (18.5%) developed obstructive and two patients (5%) developed restrictive lung function abnormalities during follow up spirometry. Conclusion: The exposed survivors with chronic respiratory symptoms had accelerated decline in lung function and they are at higher risk of developing obstructive lung function. PMID:23741089

  16. Main parameters of meteoroid motion during the fall of the Chelyabinsk meteorite shower on February 15, 2013

    NASA Astrophysics Data System (ADS)

    Golubaev, A. V.

    2015-05-01

    A rapid method is proposed for determining a meteoroid's trajectory in the Earth's atmosphere and its height and velocity at individual points. The method is designed for use with video material (regardless of the motion speed of the video recorder) for daytime bolide events. Kinematic parameters are obtained for the superbolide event followed by the Chelyabinsk meteorite shower on February 15, 2013. The (geodetic) azimuth of the meteoroid's trajectory in the Earth's atmosphere is 283.39° ± 1.7° (or 101.09° ± 1.7° toward the radiant). The radiant altitude over the site with observations of the end of the first fragmentation phase is 20.5°. The geodetic coordinates of the beginning of the bolide phenomenon and the point of suspension of the radiating material at the end of the first fragmentation phase are (64°00'02.74? ± 2.1' east longitude; 54°30'54.66? ± 3.0' north latitude) and (61°11'01.88? ± 1.6' east longitude; 54°52'06.68? ± 3.1' north latitude), respectively. The atmospheric entry velocity is 19.29 ± 0.89 km s-1. The height of the start of the light emission is 102.4 km; those of the main fragmentation phases are 28.0 and 24.4 km. The calculated elements for the heliocentric orbit of the Chelyabinsk meteoroid are: Q = 2.66 ± 1.20 AU, q = 0.73 ± 0.01 AU, a = 1.67 ± 0.10 AU, e = 0.57 ± 0.03, i = 7.07° ± 0.54°, ? = 326.42°, and ? = 106.28° ± 2.54°. These parameters are compared with the results obtained by other authors.

  17. Parameters affecting spore recovery from wipes used in biological surface sampling.

    PubMed

    Da Silva, Sandra M; Filliben, James J; Morrow, Jayne B

    2011-04-01

    The need for the precise and reliable collection of potential biothreat contaminants has motivated research in developing a better understanding of the variability in biological surface sampling methods. In this context, the objective of this work was to determine parameters affecting the efficiency of extracting Bacillus anthracis Sterne spores from commonly used wipe sampling materials and to describe performance using the interfacial energy concept. In addition, surface thermodynamics was applied to understand and predict surface sampling performance. Wipe materials were directly inoculated with known concentrations of B. anthracis spores and placed into extraction solutions, followed by sonication or vortexing. Experimental factors investigated included wipe material (polyester, cotton, and polyester-rayon), extraction solution (sterile deionized water [H(2)O], deionized water with 0.04% Tween 80 [H(2)O-T], phosphate-buffered saline [PBS], and PBS with 0.04% Tween 80 [PBST]), and physical dissociation method (vortexing or sonication). The most efficient extraction from wipes was observed for solutions containing the nonionic surfactant Tween 80. The increase in extraction efficiency due to surfactant addition was attributed to an attractive interfacial energy between Tween 80 and the centrifuge tube wall, which prevented spore adhesion. Extraction solution significantly impacted the extraction efficiency, as determined by statistical analysis (P < 0.05). Moreover, the extraction solution was the most important factor in extraction performance, followed by the wipe material. Polyester-rayon was the most efficient wipe material for releasing spores into solution by rank; however, no statistically significant difference between polyester-rayon and cotton was observed (P > 0.05). Vortexing provided higher spore recovery in H(2)O and H(2)O-T than sonication, when all three wipe materials and the reference control were considered (P < 0.05). PMID:21296945

  18. Alterations in coagulation parameters in dairy cows affected with acute mastitis caused by E. coli and S. aureus pathogens.

    PubMed

    Ismail, Zuhair A Bani; Dickinson, Charles

    2010-08-01

    This study was conducted to evaluate alterations in coagulation parameters in dairy cows affected with acute Escherichia coli (E. coli) mastitis and to compare those values to cows affected with Staphylococcus aureus (S. aureus ) mastitis. Twenty-four, adult Holstein-Friesian dairy cows affected with acute E. coli mastitis and 17 cows affected with S. aureus mastitis were studied. Cows affected with E. coli mastitis had significantly prolonged activated partial thromboplastin time (APTT) (P < 0.01), prothrombin time (PT) (P < 0.05) and decreased (P < 0.05) platelets numbers. Cows with S. aureus mastitis had only significantly prolonged APTT (P < 0.05) and decreased (P < 0.05) platelet counts. In the hematology evaluation, cows affected with E. coli and those affected with S. aureus mastitis had elevated hematocrit values but only significantly (P < 0.05) so in mastitic cows caused by E. coli. Both groups of mastitic cows had significantly (P < 0.05) lower leukocyte counts. Only cows with E. coli mastitis had significantly (P < 0.05) lower neutrophil count. In the plasma biochemical evaluation, creatinine concentrations were significantly (P < 0.05) elevated in both groups of cows. Blood urea nitrogen (BUN) concentration was only significantly elevated in cows affected with E. coli mastitis. Results of this study indicated that dairy cows affected with acute E. coli mastitis are more likely to develop clinical manifestations of disseminated intravascular coagulation than cows affected with S. aureus mastitis. PMID:20607398

  19. Mass higher educations affect the quality of higher education in China and the countermeasures of the main factors

    Microsoft Academic Search

    Rong Wang

    2010-01-01

    In this paper, the hierarchical index system of factors for the teaching quality of high education is established. Firstly, the critical factors influencing teaching quality has been analyzed. Further, the author discusses the current situation of our higher education and points out the negative effect of enrollment expansion and shortage of teachers are the main reason-hat have caused the drop

  20. Sporadic Infantile Epileptic Encephalopathy Caused by Mutations in PCDH19 Resembles Dravet Syndrome but Mainly Affects Females

    Microsoft Academic Search

    Christel Depienne; Delphine Bouteiller; Boris Keren; Emmanuel Cheuret; Karine Poirier; Oriane Trouillard; Baya Benyahia; Chloé Quelin; Wassila Carpentier; Sophie Julia; Alexandra Afenjar; Agnès Gautier; François Rivier; Sophie Meyer; Patrick Berquin; Marie Hélias; Isabelle Py; Serge Rivera; Nadia Bahi-Buisson; Isabelle Gourfinkel-An; Cécile Cazeneuve; Merle Ruberg; Alexis Brice; Rima Nabbout; Eric LeGuern

    2009-01-01

    Dravet syndrome (DS) is a genetically determined epileptic encephalopathy mainly caused by de novo mutations in the SCN1A gene. Since 2003, we have performed molecular analyses in a large series of patients with DS, 27% of whom were negative for mutations or rearrangements in SCN1A. In order to identify new genes responsible for the disorder in the SCN1A-negative patients, 41

  1. HOW INCIPIENT MOTION DETERMINATION JUDGMENT AFFECTS DIFFERENT PARAMETERS IN SEDIMENT TRANSPORT INVESTIGATION

    Microsoft Academic Search

    Muhammad Ashiq; John C Doering

    Incipient condition plays a significant role in the field of sediment transport and channel stability and different parameters based upon it are used in the sediment initiation and transport formulas both for the development and application purposes. Its determination depends upon the subjective judgment of the investigator. Effects of this judgment on sediment transport and flow parameters have been investigated

  2. Guidebook for performance assessment parameters used in the Waste Isolation Pilot Plant compliance certification application. Volume 1: Main report

    SciTech Connect

    Howarth, S.M.; Martell, M.A.; Weiner, R. [Sandia National Labs., Albuquerque, NM (United States); Lattier, C. [GRAM, Inc., Albuquerque, NM (United States)

    1998-06-01

    The Waste Isolation Pilot Plant (WIPP) Compliance Certification Application (CCA) Performance Assessment (PA) Parameter Database and its ties to supporting information evolved over the course of two years. When the CCA was submitted to the Environmental Protection Agency (EPA) in October 1996, information such as identification of parameter value or distribution source was documented using processes established by Sandia National Laboratories WIPP Quality Assurance Procedures. Reviewers later requested additional supporting documentation, links to supporting information, and/or clarification for many parameters. This guidebook is designed to document a pathway through the complex parameter process and help delineate flow paths to supporting information for all WIPP CCA parameters. In addition, this report is an aid for understanding how model parameters used in the WIPP CCA were developed and qualified. To trace the source information for a particular parameter, a dual-route system was established. The first route uses information from the Parameter Records Package as it existed when the CCA calculations were run. The second route leads from the EPA Parameter Database to additional supporting information.

  3. Stability of Intercellular Exchange of Biochemical Substances Affected by Variability of Environmental Parameters

    NASA Astrophysics Data System (ADS)

    Mihailovi?, Dragutin T.; Budin?evi?, Mirko; Balaž, Igor; Mihailovi?, Anja

    Communication between cells is realized by exchange of biochemical substances. Due to internal organization of living systems and variability of external parameters, the exchange is heavily influenced by perturbations of various parameters at almost all stages of the process. Since communication is one of essential processes for functioning of living systems it is of interest to investigate conditions for its stability. Using previously developed simplified model of bacterial communication in a form of coupled difference logistic equations we investigate stability of exchange of signaling molecules under variability of internal and external parameters.

  4. Analysis of parameters affecting engraftment in children undergoing autologous peripheral blood stem cell transplants

    Microsoft Academic Search

    E Figuerres; PR Haut; M Olzewski; M Kletzel

    2000-01-01

    Eighty-three pediatric patients underwent autologous peripheral blood stem cell transplants at a single institution and were included in a study evaluating the correlations between five engraftment parameters and the time to both neutrophil and platelet recovery. The parameters included: the number of nucleated cells per kg (TNC\\/kg), the absolute CD34+ cell content per kg (CD34+\\/kg), the number of mononuclear cells

  5. VIGILANCE POISON: Illegal poisoning and lead intoxication are the main factors affecting avian scavenger survival in the Pyrenees (France).

    PubMed

    Berny, Philippe; Vilagines, Lydia; Cugnasse, Jean-Marc; Mastain, Olivier; Chollet, Jean-Yves; Joncour, Guy; Razin, Martine

    2015-08-01

    A specific surveillance program has been set up to monitor avian scavenger populations in the French Pyrenean Mountains, hosting a high proportion of the French populations. The two main purposes of the study were to identify all causes of death and to investigate poisoning cases. All 170 birds found dead during the 7-year program were submitted to full necropsy, X-Ray, parasitological investigations and consistent analytical toxicology screenings (Cholinesterase inhibitors, anticoagulant rodenticides, organochlorine insecticides, Pb, Cd). Over the study period, 8 Bearded Vultures, 120 Griffon Vultures, 8 Egyptian Vultures and 34 Red kites were eventually collected. Mortality events were often multifactorial, but poisoning was by far the most common cause of death (24.1%), followed by trauma/fall (12%), bacterial diseases and starvation (8%) and electrocution (6%). Illicit use of banned pesticides was identified as a common cause of poisoning (53% of all poisoning cases) and lead poisoning was also identified as a significant toxicant issue (17% of all poisoning cases). Lead isotopic signature could be associated primarily with ammunition. Last, a positive association between trauma and lead contamination was detected, indicating that lead could be a significant contributor to different causes of death. These results urge for severe restrictions on the use of lead ammunition to prevent scavengers from detrimental exposure. PMID:25913360

  6. Influence of pre-injection control parameters on main-injection fuel quantity for an electronically controlled double-valve fuel injection system of diesel engine

    NASA Astrophysics Data System (ADS)

    Song, Enzhe; Fan, Liyun; Chen, Chao; Dong, Quan; Ma, Xiuzhen; Bai, Yun

    2013-09-01

    A simulation model of an electronically controlled two solenoid valve fuel injection system for a diesel engine is established in the AMESim environment. The accuracy of the model is validated through comparison with experimental data. The influence of pre-injection control parameters on main-injection quantity under different control modes is analyzed. In the spill control valve mode, main-injection fuel quantity decreases gradually and then reaches a stable level because of the increase in multi-injection dwell time. In the needle control valve mode, main-injection fuel quantity increases with rising multi-injection dwell time; this effect becomes more obvious at high-speed revolutions and large main-injection pulse widths. Pre-injection pulse width has no obvious influence on main-injection quantity under the two control modes; the variation in main-injection quantity is in the range of 1 mm3.

  7. Sensitivity studies on parameters affecting gas release from an underground rock cavern

    SciTech Connect

    Schlueter, E.; Pruess, K.

    1990-01-01

    A series of numerical simulation experiments is performed to quantify the effects of the release and migration of non-condensible gas in water-saturated fractured rock formations. The relative importance of multiphase parameters such as relative permeability, capillary pressure, intrinsic permeability, and porosity on system behavior is studied. 10 refs., 28 figs., 5 tabs.

  8. BORON DEFICIENCY AFFECTS GAS EXCHANGE AND PHOTOCHEMICAL EFFICIENCY (JPI TEST PARAMETERS) IN GREEN DWARF COCONUT

    Microsoft Academic Search

    Leandro G. R. Pinho; Eliemar Campostrini; Pedro H. Monnerat; Alena Torres Netto; André Assis Pires; Cláudio Roberto Marciano; Yaska Janaína Bastos Soares

    2010-01-01

    Boron (B) deficiency causes a wide array of symptoms, not only among species of palms, but also within a single species (i.e. Cocos nucifera). A better understanding of the effects of B deficiency in coconut will be important to try optimizing a rational fertilization management in coconut plants. Thus, modification of PSII photochemistry (using a group of fluorescence parameters, called

  9. Main and Interactive Effects of Distress Tolerance and Negative Affect Intensity in Relation to PTSD Symptoms among Trauma-Exposed Adults

    PubMed Central

    Vujanovic, Anka A.; Hart, Ashley S.; Potter, Carrie M.; Berenz, Erin C.; Niles, Barbara; Bernstein, Amit

    2013-01-01

    The present investigation evaluated the main and interactive effects of distress tolerance and negative affect intensity in relation to posttraumatic stress disorder (PTSD) symptom severity and symptom cluster severity. Participants were 190 trauma-exposed adults (52.6 % women; Mage=25.3 years, SD=11.4) recruited from the community. Distress tolerance (i.e., perceived ability to withstand distressing emotional states) demonstrated significant incremental associations with global PTSD symptom severity as well as Re-Experiencing, Emotional Numbing, and Hyperarousal symptom cluster severity. Negative affect intensity (i.e., perceived intensity of negative emotional responses) demonstrated significant incremental associations with each of the PTSD symptom outcomes. Moreover, the incremental interactive effect of distress tolerance and negative affect intensity was significantly associated with PTSD symptom severity as well as PTSD—Emotional Numbing symptom cluster severity. These incremental effects were evident after accounting for the variance explained by anxiety sensitivity (i.e., fear of anxiety-related sensations). Post hoc probing analyses supported the moderating role of negative affect intensity in the association between distress tolerance and PTSD symptom severity, such that low levels of distress tolerance, in the context of elevated levels of negative affect intensity, were associated with the greatest levels of PTSD symptoms. PMID:24431482

  10. Chromosomal Instability Parameters in the Population Affected by Nuclear Explosions at the Semipalatinsk Nuclear Test Site

    Microsoft Academic Search

    G. Zh. Abil'dinova; N. P. Kuleshov; G. S. Svyatova

    2003-01-01

    A population genetic survey of 149 persons who were born and have permanently lived in the contaminated zones of the Semipalatinsk region has been performed. A cytogenetic study has demonstrated that the frequency of aberrant cells is 1.7–3 times higher than control parameters. The total frequencies of chromosome aberrations are 3.43 ± 0.48, 3.1 ± 0.3, 1.8 ± 0.2, and

  11. Within-pond parameters affecting oviposition by wood frogs and spotted salamanders

    Microsoft Academic Search

    Robert S. Egan; Peter W. C. Paton

    2004-01-01

    Previous research on habitat associations of pond-breeding amphibians has used community assemblages as response variables\\u000a because the intensive labor required to quantify population size is usually prohibitive. However, wood frogs (Rana sylvatica) and spotted salamanders (Ambystoma maculatum) oviposit egg masses that can be surveyed rapidly; thus, we were able to quantify the influence of within-pond parameters\\u000a on their annual breeding

  12. How do population genetic parameters affect germination of the heterocarpic species Atriplex tatarica (Amaranthaceae)?

    PubMed Central

    Kochánková, Jana; Mandák, Bohumil

    2009-01-01

    Background and Aims The heterocarpic species Atriplex tatarica produces two types of seeds. In this study, how basic population genetic parameters correlate with seed germinability under various experimental conditions was tested. Methods Population genetic diversity was ascertained in eight populations of A. tatarica by assessing patterns of variation at nine allozyme loci. Germinability of both seed types from all sampled populations was determined by a common laboratory experiment under different salinity levels. Basic population genetic parameters, i.e. percentage of polymorphic loci, average number of alleles per locus and observed heterozygosity were correlated with observed population germination characteristics. Key Results Atriplex tatarica possesses a remarkable heterocarpy, i.e. one type of seed is non-dormant and the other shows different dormancy levels in relation to experimental conditions. Significant negative correlations have been detected between germination of both seed types and the coefficient of inbreeding, and a significant negative correlation between germination of dormant seeds and other population genetic parameters, i.e. percentage of polymorphic loci and average number of alleles per polymorphic locus. Moreover, populations from the region characterized by a shorter growing season manifested higher germinability, i.e. had lower dormancy, than those from the lower-latitude one. Conclusions In general, germination of non-dormant seeds is probably not under strong genetic control. Hence, they germinate as soon as conditions are favourable, thus ensuring survival in the short term, but populations risk local extinction if conditions become adverse (i.e. a high-risk strategy). In contrast, germination of the dormant type of seeds is under stronger genetic control and is significantly correlated with basic population genetic parameters. These seeds ensure long-term reproduction and survival in the field by protracted germination, albeit in low quantities (i.e. A. tatarica also adopts a low-risk strategy). PMID:19339299

  13. Parameters affecting the efficiency of Agrobacterium tumefaciens -mediated transformation of Colletotrichum graminicola

    Microsoft Academic Search

    Jennifer L. Flowers; Lisa J. Vaillancourt

    2005-01-01

    We have developed an Agrobacterium\\u000a tumefaciens-mediated transformation (ATMT) protocol for the plant pathogenic fungus Colletotrichum graminicola, the cause of anthracnose leaf blight and stalk rot of corn. The ATMT results in higher transformation efficiencies than\\u000a previously available polyethylene glycol-mediated protocols, and falcate spores can be used instead of protoplasts for transformation.\\u000a Various experimental parameters were tested for their effects on

  14. Application Parameters Affecting Field Efficacy of Beauveria bassiana Foliar Treatments against Colorado Potato Beetle Leptinotarsa decemlineata

    Microsoft Academic Search

    S. P Wraight; M. E Ramos

    2002-01-01

    The effects of various spray-application parameters on the efficacy of Beauveria bassiana foliar treatments against Leptinotarsa decemlineata larvae were evaluated during three field seasons. Treatments were applied to small plots (6 rows × 7–12 m) using a CO2-powered backpack hydraulic sprayer with nozzles affixed to lateral drop tubes and directed upward at a 45° angle to target ventral leaf surfaces.

  15. Investigation of parameters affecting the acceleration of a helicopter in the longitudinal axis 

    E-print Network

    Little, Michael Elsworth

    1986-01-01

    train consists of a main transmission, intermediate gear box and tail rotor gear box with interconnecting shafts. The propulsion system has two General Electric T700 turboshaft engines operating in parallel. The nonretractable landing gear consists... additional force in the X direction and causes the aircraft to accelerate. A secondary effect is that altitude is lost as a result of tilting the lift vector forward. Now some of the lift used to maintain altitude is being used for additional propulsive...

  16. On the secondary stability of coated cementless hip replacement: parameters that affected interface strength.

    PubMed

    Orlik, Julia; Zhurov, Alexei; Middleton, John

    2003-12-01

    Unlike primary stability of coated cementless implants, their secondary stability has been poorly studied. This paper considers some theoretical aspects of the secondary stability of a coated cementless hip implant in a human femur. The bone is separated from the implant by a thin layer of microscopic peaks and troughs formed on the surface of the coating. The size of the peaks and troughs is very small compared with the macrosize of the implant stem and bone in contact. The study of the bone-stem contact by direct application of the finite element method is prohibitively costly. A two-scale asymptotic homogenisation procedure that takes into account the microgeometry of the interface layer and mechanical properties of bone and the implant material is applied to obtain effective, homogenised contact parameters. These parameters can be used in finite element analyses involving smooth interfaces, which require hundreds of times fewer finite elements. With the homogenisation technique and finite element analyses for a simplified design, two parameters were found to be most important--the normal contact stiffness and the friction coefficient. They both increase several times as bone grows into the rough surface of the implant and mineralises, thus providing a stronger interface and resulting in reduced micromotions. PMID:14630470

  17. Coated or doped carbon nanotube network sensors as affected by environmental parameters

    NASA Technical Reports Server (NTRS)

    Li, Jing (Inventor)

    2011-01-01

    Methods for using modified single wall carbon nanotubes ("SWCNTs") to detect presence and/or concentration of a gas component, such as a halogen (e.g., Cl.sub.2), hydrogen halides (e.g., HCl), a hydrocarbon (e.g., C.sub.nH.sub.2n+2), an alcohol, an aldehyde or a ketone, to which an unmodified SWCNT is substantially non-reactive. In a first embodiment, a connected network of SWCNTs is coated with a selected polymer, such as chlorosulfonated polyethylene, hydroxypropyl cellulose, polystyrene and/or polyvinylalcohol, and change in an electrical parameter or response value (e.g., conductance, current, voltage difference or resistance) of the coated versus uncoated SWCNT networks is analyzed. In a second embodiment, the network is doped with a transition element, such as Pd, Pt, Rh, Ir, Ru, Os and/or Au, and change in an electrical parameter value is again analyzed. The parameter change value depends monotonically, not necessarily linearly, upon concentration of the gas component. Two general algorithms are presented for estimating concentration value(s), or upper or lower concentration bounds on such values, from measured differences of response values.

  18. Application of ANN to evaluate effective parameters affecting failure load and displacement of RC buildings

    NASA Astrophysics Data System (ADS)

    Hakan Arslan, M.

    2009-06-01

    This study investigated the efficiency of an artificial neural network (ANN) in predicting and determining failure load and failure displacement of multi story reinforced concrete (RC) buildings. The study modeled a RC building with four stories and three bays, with a load bearing system composed of columns and beams. Non-linear static pushover analysis of the key parameters in change defined in Turkish Earthquake Code (TEC-2007) for columns and beams was carried out and the capacity curves, failure loads and displacements were obtained. Totally 720 RC buildings were analyzed according to the change intervals of the parameters chosen. The input parameters were selected as longitudinal bar ratio (?l) of columns, transverse reinforcement ratio (Asw/sc), axial load level (N/No), column and beam cross section, strength of concrete (fc) and the compression bar ratio (?'/?) on the beam supports. Data from the nonlinear analysis were assessed with ANN in terms of failure load and failure displacement. For all outputs, ANN was trained and tested using of 11 back-propagation methods. All of the ANN models were found to perform well for both failure loads and displacements. The analyses also indicated that a considerable portion of existing RC building stock in Turkey may not meet the safety standards of the Turkish Earthquake Code (TEC-2007).

  19. Arterial blood gas and spirometry parameters affect the length of stay in hospitalized asthmatic patients

    PubMed Central

    Mousavi, Seyed Ali Javad; Fereshtehnejad, Seyed-Mohammad; Khalili, Neda; Naghavi, Malihe; Yahyazadeh, Hooman

    2014-01-01

    Background: Asthma is a common condition in general medical practice, and it accounts for about 1% of all ambulatory hospital visits. Nowadays, hospitalization rates for asthma have actually been increased in some demographic subgroups despite recent advances in treatment. Understanding the underlying factors that contribute to hospitalization and especially duration of the hospitalization of asthmatics could help elucidate the recent rise in morbidity and also reduce the high demand on health care systems of the disease. The aim of this study was to evaluate factors affecting the duration of hospitalization for Iranian patients with asthma. Methods: This study was conducted on 55 asthmatic patients (diagnosis of asthma was in accordance with the criteria of the American Thoracic Society). The study was performed on patients hospitalized in Rasoul-e-Akram hospital in Tehran, Iran during the period 2005-2006. During hospitalization, the patients’ most common complaints were recorded as the symptoms and signs of the medical condition, results of physical examinations, spirometry, arterial blood gas analysis (ABG), and ICU admission. Results: There were 18(32.7%) male and 37(67.3%) female patients with a mean age of 54.96 (SD=17.54) years. The mean duration of hospitalization was 8.31(SD=4.69) days that ranged between 2 and 23 days. The mean baseline arterial PH (p=0.039, RPearso = -0.362), baseline arterial [HCO3] (p=0.042, RPearson = 0.361), changes of FEV1 after bronchodilator (p=0.041, RPearson= -0.363) and patient's age (p=0.002, RPearson=0.0433) were determined as factors affecting duration of hospitalization. Conclusion: Our results showed that more attention needs to be given to the findings of arterial blood gas and spirometry which can potentially affect the duration of hospitalization of asthmatic patients. PMID:25250249

  20. How parameters and regularization affect the PNJL model phase diagram and thermodynamic quantities

    E-print Network

    Pedro Costa; H. Hansen; M. C. Ruivo; C. A. de Sousa

    2010-01-15

    We explore the phase diagram and the critical behavior of QCD thermodynamic quantities in the context of the so-called Polyakov--Nambu--Jona-Lasinio model. We show that this improved field theoretical model is a successful candidate for studying the equation of state and the critical behavior around the critical end point. We argue that a convenient choice of the model parameters is crucial to get the correct description of isentropic trajectories. The effects of the regularization procedure in several thermodynamic quantities is also analyzed. The results are compared with simple thermodynamic expectations and lattice data.

  1. Cosmic Rays and Solar Insolation as the Main Control Parameters of the Catastrophe Theory of Climatic Response to Orbital Variations

    Microsoft Academic Search

    V. D. Rusov; A. V. Glushkov; V. N. Vaschenko; V. N. Pavlovich; T. N. Zelentsova; O. T. Mihalus; V. A. Tarasov; D. N. Saranuk

    2004-01-01

    The energy-balance model of global climate, which is taking into account a\\u000anontrivial role of solar and galactic protons, is presented. The model is\\u000adescribed by the equation of fold catastrophe relative to increment of\\u000atemperature, where the variation of a solar insolation and cosmic rays are\\u000acontrol parameters. It is shown that the bifurcation equation of the model\\u000adescribes

  2. EFFECTS OF TRAP SELECTIVITYAND SOME POPULATION PARAMETERS ON SIZE COMPOSITION OF THE AMERICANLOBSTER, HOMARUSAMERICANUS,CATCH ALONG THE MAINE COASTl

    Microsoft Academic Search

    JAY S. KROUSE; JAMES C. THOMAS

    ABSTRACf Information collected aboard commercial lobster boats along the Maine coast (1971-73) revealed, among other things, high numbers of sublegal lobsters «81 mm carapace length) being handled by fishermen while sorting their catches. Throw-back ratios of illegal to legal lobsters (1.8 to 12.4:1) varied in association with lath spacing. Traps with spacings of 1% to 1% inches accounted for markedly

  3. Determination of mechanisms and parameters which affect radon entry into a room.

    PubMed

    Vasilyev, A V; Zhukovsky, M V

    2013-10-01

    There are practically no direct techniques for measuring radon entry rate in the rooms. The suggested technique allows estimating such parameter under real conditions. The technique for radon diagnostic procedures including radon entry rate and air change rate assessment was proposed and tested in the field under various experimental conditions. The method consists of the continuous measurement of radon concentration, temperature and pressure difference between indoor and outdoor atmosphere. It was demonstrated that the study of dependence of radon entry rate on temperature difference ?T between indoor and outdoor atmosphere allows to estimate the dominant radon entry mechanism - diffusion mechanism (absence of the dependence on ?T) or convective (radon entry rate increase at ?T increase). It was shown that simultaneous measurements of time series of radon concentration and pressure difference between building envelope and outdoor atmosphere allow assessing such room parameter as Effective Leakage Area. The approach applied in this paper to estimate the air change rate practically is not differing from tracer gas techniques when the constant gas entry rate is used. It was shown that radon could be used as kind of tracer gas to estimate the air change rate. Obtained measurement results for all buildings confirmed the seasonal variations of radon concentrations. A correlation of radon concentration and air change rate with outside temperature occurred in general. PMID:23811128

  4. The nonsteroidal anti-inflammatory drug, ibuprofen, affects the immune parameters in the clam Ruditapes philippinarum.

    PubMed

    Matozzo, Valerio; Rova, Silvia; Marin, Maria Gabriella

    2012-08-01

    The effects of ibuprofen (IBU) on the immune parameters of the clam Ruditapes philippinarum were investigated after a 7-day exposure to sublethal IBU concentrations (0, 0 + ethanol, 100, 500, and 1000 ?g/L). Total haemocyte count (THC), haemocyte diameter and volume, haemocyte proliferation and uptake of the vital dye Neutral Red (NR) were measured. The cytotoxicity (assessed by the lactate dehydrogenase assay, LDH) and the capability of IBU to induce DNA fragmentation (indicative of apoptosis) were also investigated. The exposure of clams to the highest IBU concentration significantly reduced their THC, whereas no significant changes were observed in either the diameter or volume of haemocytes. Significant increases in haemocyte proliferation were recorded in clams that were exposed to the two highest tested concentrations of IBU. Exposure of clams to 1000 ?g IBU/L significantly reduced NR uptake and increased haemolymph LDH activity. Conversely, IBU did not induce DNA fragmentation in haemocytes. Although the IBU concentrations tested in this study were higher than those generally recorded in aquatic environments, results obtained indicate that exposure of clams to IBU induces significant alterations in the immune parameters and suggest potential immunosuppression in treated clams. PMID:22727203

  5. Homocysteine exposure affects early hemodynamic parameters of embryonic chicken heart function.

    PubMed

    Oosterbaan, Annelien M; Bon, Els; Steegers-Theunissen, Regine P M; Van Der Steen, Anton F W; Ursem, Nicolette T C

    2012-06-01

    Maternal hyperhomocysteinemia has been associated with an increased risk of newborns with a congenital heart defect. This has been substantiated in the chicken embryo, as congenital heart defects have been induced after homocysteine treatment. Comparable heart defects are observed in venous clipping studies, a model of altered embryonic blood flow. Because of this overlap in heart defects, our aim was to test the hypothesis that homocysteine would cause alterations in embryonic heart function that precede the structural malformations previously described. Therefore, Doppler flow velocity waveforms were recorded in both primitive ventricles and the outflow tract of the embryonic heart of homocysteine treated and control chicken embryos at embryonic day 3.5. Homocysteine treatment consisted of 50 ?L 0.05 M L-homocysteine thiolactone at 24, 48, and 72 hr. Homocysteine-treated embryos displayed significantly lower mean heart rates of 134 (SD 22) bpm, compared to 150 (14) bpm in control embryos. Homocysteine treatment caused an inhibiting effect on hemodynamic parameters, and altered heart function was presented by a shift in the proportions of the different wave times in percentage of total cycle time. Homocysteine induces changes in hemodynamic parameters of early embryonic chicken heart function. These changes may precede morphological changes and contribute to the development of CHD defects through alterations in shear stress and shear stress related genes, as seen before in venous clipping studies. PMID:22528512

  6. A systematic experimental investigation of significant parameters affecting model tire hydroplaning

    NASA Technical Reports Server (NTRS)

    Wray, G. A.; Ehrlich, I. R.

    1973-01-01

    The results of a comprehensive parametric study of model and small pneumatic tires operating on a wet surface are presented. Hydroplaning inception (spin down) and rolling restoration (spin up) are discussed. Conclusions indicate that hydroplaning inception occurs at a speed significantly higher than the rolling restoration speed. Hydroplaning speed increases considerably with tread depth, surface roughness and tire inflation pressure of footprint pressure, and only moderately with increased load. Water film thickness affects spin down speed only slightly. Spin down speed varies inversely as approximately the one-sixth power of film thickness. Empirical equations relating tire inflation pressure, normal load, tire diameter and water film thickness have been generated for various tire tread and surface configurations.

  7. Quality parameters for alpaca (Vicugna pacos) semen are affected by semen collection procedure.

    PubMed

    Morton, K M; Thomson, P C; Bailey, K; Evans, G; Maxwell, W M C

    2010-08-01

    Artificial insemination (AI) is poorly developed in camelids owing to the difficulty in collecting high quality semen and the highly viscous nature of the semen. Semen collected by artificial vagina (AV) is often of low quality and must be improved before any further development of AI technology can occur. The present study investigated the effects of adding a cervix-like stricture to the AV, presence of females, collecting semen into Androhep, skim-milk or Tris diluents, and catalase supplementation (0, 100, 200 or 600 units/ml) of Tris diluent on alpaca semen quality parameters. The addition of a cervix-like stricture increased mating length (p < 0.05), whilst the presence of females during semen collection did not improve semen quality parameters (p > 0.05). Collection of semen into Tris diluent improved sperm motility (58.0 +/- 11.9%) compared with the control (34.0 +/- 10.8%; p < 0.05), Androhep (33.5 +/- 10.7%) and skim-milk diluents (28.2 +/- 10.4%). Semen viscosity was reduced by collection into Androhep (4.6 +/- 1.7 mm) and skim-milk diluents (3.6 +/- 1.3 mm) compared with Tris diluent (5.7 +/- 2.1 mm) and no collection medium (9.3 +/- 3.5 mm; p < 0.05). Tris diluent supplemented with 100, 200 or 600 units/ml catalase increased semen viscosity (5.0 +/- 3.2 and 4.9 +/- 3.2 mm). Collection of alpaca semen by AV into Tris diluent increased semen quality facilitating further development of AI technology in alpacas. PMID:19144029

  8. Antimicrobial resistances do not affect colonization parameters of intestinal E. coli in a small piglet group

    PubMed Central

    Schierack, Peter; Kadlec, Kristina; Guenther, Sebastian; Filter, Matthias; Schwarz, Stefan; Ewers, Christa; Wieler, Lothar H

    2009-01-01

    Background Although antimicrobial resistance and persistence of resistant bacteria in humans and animals are major health concerns worldwide, the impact of antimicrobial resistance on bacterial intestinal colonization in healthy domestic animals has only been rarely studied. We carried out a retrospective analysis of the antimicrobial susceptibility status and the presence of resistance genes in intestinal commensal E. coli clones from clinically healthy pigs from one production unit with particular focus on effects of pheno- and/or genotypic resistance on different nominal and numerical intestinal colonization parameters. In addition, we compared the occurrence of antimicrobial resistance phenotypes and genotypes with the occurrence of virulence associated genes typical for extraintestinal pathogenic E. coli. Results In general, up to 72.1% of all E. coli clones were resistant to ampicillin, chloramphenicol, kanamycin, streptomycin, sulfamethoxazole or tetracycline with a variety of different resistance genes involved. There was no significant correlation between one of the nominal or numerical colonization parameters and the absence or presence of antimicrobial resistance properties or resistance genes. However, there were several statistically significant associations between the occurrence of single resistance genes and single virulence associated genes. Conclusion The demonstrated resistance to the tested antibiotics might not play a dominant role for an intestinal colonization success in pigs in the absence of antimicrobial drugs, or cross-selection of other colonization factors e.g. virulence associated genes might compensate "the cost of antibiotic resistance". Nevertheless, resistant strains are not outcompeted by susceptible bacteria in the porcine intestine. Trial Registration The study was approved by the local animal welfare committee of the "Landesamt für Arbeitsschutz, Gesundheitsschutz und technische Sicherheit" Berlin, Germany (No. G0037/02). PMID:19814790

  9. Theoretical, numerical and experimental study of geometrical parameters that affect anisotropy measurements in polarization-resolved SHG microscopy.

    PubMed

    Teulon, Claire; Gusachenko, Ivan; Latour, Gaël; Schanne-Klein, Marie-Claire

    2015-04-01

    Polarization-resolved second harmonic generation (P-SHG) microscopy is an efficient imaging modality for in situ observation of biopolymers structure in tissues, providing information about their mean in-plane orientation and their molecular structure and 3D distribution. Nevertheless, P-SHG signal build-up in a strongly focused regime is not throroughly understood yet, preventing reliable and reproducible measurements. In this study, theoretical analysis, vectorial numerical simulations and experiments are performed to understand how geometrical parameters, such as excitation and collection numerical apertures and detection direction, affect P-SHG imaging in homogeneous collagen tissues. A good agreement is obtained in tendon and cornea, showing that detection geometry significantly affects the SHG anisotropy measurements, but not the measurements of collagen in-plane orientation. PMID:25968762

  10. Experimental and theoretical studies on physico-chemical parameters affecting the solubility of phosphogypsum.

    PubMed

    Papanicolaou, Fanos; Antoniou, Stella; Pashalidis, Ioannis

    2009-10-01

    Phosphogypsum is a waste by-product of the phosphate fertilizer industry, which is usually disposed in the environment because of its restricted use in industrial applications. Physico-chemical conditions existing in stack fluids and leachates are of major importance and determine solubility and redox stability of phosphogypsum, as well as radionuclide release from stacks to terrestrial environments. The aim of this study is to assess the effect of key parameters (e.g. ionic strength, temperature, pH) on the solubility of phosphogypsum. Phosphogypsum sampling and in-situ measurements were carried out at a coastal stack in Cyprus, solubility experiments were performed in simulated laboratory systems and thermodynamic calculations by means of MINTEQA2, an equilibrium speciation model. Generally, increasing ionic strength and temperature leads to increased phosphogypsum solubility, with the former being much more effective. The increased solubility of phosphogypsum in saline solutions is attributed solely to ionic strength effects on the activity of ionic species in solution and no solid phase transformations could be observed. The effect of pH on phosphogypsum solubility seems to be insignificant at least in a pH range between 4 and 8. Regarding uranium levels, there is a strong correlation between salinity and uranium concentration and linear correlation between phosphogypsum solubility and uranium levels in stack solutions, indicating the incorporation of uranium into the gypsum lattice and the formation of a solid solution. PMID:19596498

  11. Dermal nanocrystals from medium soluble actives - physical stability and stability affecting parameters.

    PubMed

    Zhai, Xuezhen; Lademann, Jürgen; Keck, Cornelia M; Müller, Rainer H

    2014-09-01

    Nanocrystals are meanwhile applied to increase the dermal penetration of drugs, but were applied by now only to poorly soluble drugs (e.g. 1-10 ?g/ml). As a new concept nanocrystals from medium soluble actives were produced, using caffeine as model compound (solubility 16 mg/ml at 20 °C). Penetration should be increased by (a) further increase in solubility and (b) mainly by increased hair follicle targeting of nanocrystals compared to pure solution. Caffeine nanocrystal production in water lead to pronounced crystal growth. Therefore the stability of nanocrystals in water-ethanol (1:9) and ethanol-propylene glycol (3:7) mixtures with lower dielectric constant D was investigated, using various stabilizers. Both mixtures in combination with Carbopol 981 (non-neutralized) yielded stable nanosuspensions over 2 months at 4 °C and room temperature. Storage at 40 °C lead to crystal growth, attributed to too strong solubility increase, supersaturation and Ostwald ripening effects. Stability of caffeine nanocrystals at lower temperatures could not only be attributed to lower solubility, because the solubilities of caffeine in mixtures and in water are not that much different. Other effects such as quantified by reduced dielectric constant D, and specific interactions between dispersion medium and crystal surface seem to play a role. With the 2 mixtures and Carbopol 981, a basic formulation composition for this type of nanocrystals has been established, to be used in the in vivo proof of principle of the new concept. PMID:25016978

  12. Do fattening process and biological parameters affect the accumulation of metals in Atlantic bluefin tuna?

    PubMed

    Milatou, Niki; Dassenakis, Manos; Megalofonou, Persefoni

    2015-07-01

    The objective of this study was to determine the current levels of heavy metals and trace elements in Atlantic bluefin tuna muscle tissues and how they are influenced by the fattening process and various life history parameters to ascertain whether the concentrations in muscle tissue exceed the maximum levels defined by the European Commission Decision and to evaluate the health risk posed by fish consumption. A total of 20 bluefin tuna reared in sea cages, ranging from 160 to 295 cm in length and from 80 to 540 kg in weight, were sampled from a bluefin tuna farm in the Ionian Sea. The condition factor K of each specimen was calculated and their age was estimated. Heavy metal and trace element (Hg, Zn, Fe and Cu) contents were determined in muscle tissue using cold vapour atomic absorption spectrometry and flame and graphite furnace atomic absorption spectrometry. The total Hg concentrations ranged from 0.28 to 1.28 mg kg(-1) w/w, Zn from 5.81 to 76.37 mg kg(-1) w/w, Fe from 12.14 to 39.58 mg kg(-1) w/w, and Cu from 0.36 to 0.94 mg kg(-1) w/w. Only 5% of the muscle samples of tuna contained Hg above the maximum level laid down by the European Commission Decision. Moreover, 15% of the muscle samples contained Zn above the maximum level, while Fe and Cu concentrations were within the acceptable tolerable guideline values. The reared bluefin tuna had lower concentrations of Hg than the wild ones from the Mediterranean Sea. Hg and Fe concentrations showed a positive relationship with size and age of bluefin tuna, whereas negative relationships were found for the concentrations of Zn and Cu. The estimated dietary intake values of the analysed metals were mostly below the derived guidelines. PMID:25906290

  13. "RadioAstron"-A telescope with a size of 300 000 km: Main parameters and first observational results

    NASA Astrophysics Data System (ADS)

    Kardashev, N. S.; Khartov, V. V.; Abramov, V. V.; Avdeev, V. Yu.; Alakoz, A. V.; Aleksandrov, Yu. A.; Ananthakrishnan, S.; Andreyanov, V. V.; Andrianov, A. S.; Antonov, N. M.; Artyukhov, M. I.; Arkhipov, M. Yu.; Baan, W.; Babakin, N. G.; Babyshkin, V. E.; Bartel', N.; Belousov, K. G.; Belyaev, A. A.; Berulis, J. J.; Burke, B. F.; Biryukov, A. V.; Bubnov, A. E.; Burgin, M. S.; Busca, G.; Bykadorov, A. A.; Bychkova, V. S.; Vasil'kov, V. I.; Wellington, K. J.; Vinogradov, I. S.; Wietfeldt, R.; Voitsik, P. A.; Gvamichava, A. S.; Girin, I. A.; Gurvits, L. I.; Dagkesamanskii, R. D.; D'Addario, L.; Giovannini, G.; Jauncey, D. L.; Dewdney, P. E.; D'yakov, A. A.; Zharov, V. E.; Zhuravlev, V. I.; Zaslavskii, G. S.; Zakhvatkin, M. V.; Zinov'ev, A. N.; Ilinen, Yu.; Ipatov, A. V.; Kanevskii, B. Z.; Knorin, I. A.; Casse, J. L.; Kellermann, K. I.; Kovalev, Yu. A.; Kovalev, Yu. Yu.; Kovalenko, A. V.; Kogan, B. L.; Komaev, R. V.; Konovalenko, A. A.; Kopelyanskii, G. D.; Korneev, Yu. A.; Kostenko, V. I.; Kotik, A. N.; Kreisman, B. B.; Kukushkin, A. Yu.; Kulishenko, V. F.; Cooper, D. N.; Kut'kin, A. M.; Cannon, W. H.; Larionov, M. G.; Lisakov, M. M.; Litvinenko, L. N.; Likhachev, S. F.; Likhacheva, L. N.; Lobanov, A. P.; Logvinenko, S. V.; Langston, G.; McCracken, K.; Medvedev, S. Yu.; Melekhin, M. V.; Menderov, A. V.; Murphy, D. W.; Mizyakina, T. A.; Mozgovoi, Yu. V.; Nikolaev, N. Ya.; Novikov, B. S.; Novikov, I. D.; Oreshko, V. V.; Pavlenko, Yu. K.; Pashchenko, I. N.; Ponomarev, Yu. N.; Popov, M. V.; Pravin-Kumar, A.; Preston, R. A.; Pyshnov, V. N.; Rakhimov, I. A.; Rozhkov, V. M.; Romney, J. D.; Rocha, P.; Rudakov, V. A.; Räisänen, A.; Sazankov, S. V.; Sakharov, B. A.; Semenov, S. K.; Serebrennikov, V. A.; Schilizzi, R. T.; Skulachev, D. P.; Slysh, V. I.; Smirnov, A. I.; Smith, J. G.; Soglasnov, V. A.; Sokolovskii, K. V.; Sondaar, L. H.; Stepan'yants, V. A.; Turygin, M. S.; Turygin, S. Yu.; Tuchin, A. G.; Urpo, S.; Fedorchuk, S. D.; Finkel'shtein, A. M.; Fomalont, E. B.; Fejes, I.; Fomina, A. N.; Khapin, Yu. B.; Tsarevskii, G. S.; Zensus, J. A.; Chuprikov, A. A.; Shatskaya, M. V.; Shapirovskaya, N. Ya.; Sheikhet, A. I.; Shirshakov, A. E.; Schmidt, A.; Shnyreva, L. A.; Shpilevskii, V. V.; Ekers, R. D.; Yakimov, V. E.

    2013-03-01

    The Russian Academy of Sciences and Federal Space Agency, together with the participation of many international organizations, worked toward the launch of the RadioAstron orbiting space observatory with its onboard 10-m reflector radio telescope from the Baikonur cosmodrome on July 18, 2011. Together with some of the largest ground-based radio telescopes and a set of stations for tracking, collecting, and reducing the data obtained, this space radio telescope forms a multi-antenna ground-space radio interferometer with extremely long baselines, making it possible for the first time to study various objects in the Universe with angular resolutions a million times better than is possible with the human eye. The project is targeted at systematic studies of compact radio-emitting sources and their dynamics. Objects to be studied include supermassive black holes, accretion disks, and relativistic jets in active galactic nuclei, stellar-mass black holes, neutron stars and hypothetical quark stars, regions of formation of stars and planetary systems in our and other galaxies, interplanetary and interstellar plasma, and the gravitational field of the Earth. The results of ground-based and inflight tests of the space radio telescope carried out in both autonomous and ground-space interferometric regimes are reported. The derived characteristics are in agreement with the main requirements of the project. The astrophysical science program has begun.

  14. Physical parameters and morphology of comet 67P/Churyumov-Gerasimenko - a main target of Rosetta space mission

    NASA Astrophysics Data System (ADS)

    Churyumov, Klim; Kleshchonok, Valery; Mozgova, Alyona

    Rosetta, a European space vehicle was head to the icy nucleus of the short period comet 67P/Churyumov-Gerasimenko on 2 March, 2004 from cosmodrome Kouru. On 20 Jan. 2014, Rosetta after 10 years of flight and 31-month sleep has been woke up succesfully and now will approche to the icy nucleus of comet Churyumov-Gerasimenko and pass away into orbit around the cometary nucleus. In November 2014 the Philae probe will be sent from Rosetta on the nucleus of comet 67P to study the relict matter of the Solar system. Comet 67P was discovered by the Kyiv astronomers Klim Churyumov and Svitlana Gerasimenko on 22 October 1969 on the five photographic plates exponed with the help of 50-cm Maksutov’s reflector of the Alma-Ata Astrophysical Institute on 9, 11 and 21 Sept. 1969. First 5 exact positions of comet were sent to Dr Brian Marsden. Dr B.Marsden showed it was new comet. The comet had an apparent magnitude of 13 and a faint tail about 1 arcmin in length at position angle 280 degrees. The astronomer Nikolay Belyaev from Saint-Petersbourg calculated that the comet followed an elliptical orbit. In 1982 it had the close encounter with the Earth at 0.3910 A.U. On the basis of the observations of comet 67P obtained in Nizhny Arkhyz with the help of the 6- BTA reflector of SAO of RAS some physical parameters of its comet plasma tail (coefficients of diffusion Dp(parallel) , Ds(perpendicular) and induction of magnetic field B) were determined. Other results of exploration of comet 67P (its polarisation, spectral observations, the light curve and morphology) in different apparitions are discussed.

  15. Commercial formulation containing 2,4-D affects biochemical parameters and morphological indices of silver catfish exposed for 90 days.

    PubMed

    Menezes, Charlene; Fonseca, Milene B; Leitemperger, Jossiele; Pretto, Alexandra; Moraes, Bibiana S; Murussi, Camila R; Baldisserotto, Bernardo; Loro, Vania L

    2015-04-01

    The objective of this study was to verify whether a commercial formulation of 2,4 dichlorophenoxyacetic acid [2,4-D dimethylamine salt (DMA)] affects the growth and biochemical parameters of silver catfish (Rhamdia quelen) after 90 days of exposure. The fish exposed to 0.5 or 2.0 mg/L of DMA presented exhibited decreased growth parameters. Glucose was reduced in the mucus layer at both concentrations, and the total protein level was increased at the highest concentration tested. Fish exposed to DMA showed reduced liver and kidney glycogen at both concentrations tested, while in the muscle, glycogen was reduced only at 2.0 mg/L. Glucose was increased in the liver and decreased in the muscle and kidney at both concentrations and was not altered in the plasma. Lactate was increased in all the tissues and decreased in the plasma. Protein levels were reduced in the liver and plasma at both concentrations, while in the muscle, it was decreased at a concentration of 2.0 mg/L. Levels of thiobarbituric acid-reactive substances were reduced in the liver and increased in the muscle at both concentrations and did not change in the brain. DMA increased catalase activity in the liver at both concentrations tested. The present study demonstrates the effects of long-term exposure to DMA. Some parameters could be used as toxicity indicators to identify the presence of DMA in an aquatic environment. PMID:25213788

  16. What patients want from the treatment of Dupuytren's disease--is the Unité Rhumatologique des Affections de la Main (URAM) scale relevant?

    PubMed

    Rodrigues, J N; Zhang, W; Scammell, B E; Davis, T R C

    2015-02-01

    Patients awaiting surgery for Dupuytren's contractures listed the problems from their Dupuytren's disease that had led them to request surgery and their relative priorities of the results of surgery. The listed problems were compared with the nine items comprising the Unité Rhumatologique des Affections de la Main (URAM) Dupuytren's disease-specific outcome measure. One hundred and ten patients reported 278 problems. Ninety-four different combinations of problems were provided by patients, and over half (55%) of the problems were not captured by items in the URAM scale. The long-term outcome from surgery was relatively more important to patients than speed of recovery. The URAM tool may not be relevant to patients in the UK, and further assessment of its face validity is required before it is used. PMID:24563499

  17. Improvement of Oxidative and Metabolic Parameters by Cellfood Administration in Patients Affected by Neurodegenerative Diseases on Chelation Treatment

    PubMed Central

    Fulgenzi, Alessandro; Giuseppe, Rachele De; Bamonti, Fabrizia; Ferrero, Maria Elena

    2014-01-01

    Objective. This prospective pilot study aimed at evaluating the effects of therapy with antioxidant compounds (Cellfood, and other antioxidants) on patients affected by neurodegenerative diseases (ND), who displayed toxic metal burden and were subjected to chelation treatment with the chelating agent calcium disodium ethylenediaminetetraacetic acid (CaNa2EDTA or EDTA). Methods. Two groups of subjects were studied: (a) 39 patients affected by ND and (b) 11 subjects unaffected by ND (controls). The following blood parameters were analyzed before and after three months' treatment with chelation + Cellfood or chelation + other antioxidants: oxidative status (reactive oxygen species, ROS; total antioxidant capacity, TAC; oxidized LDL, oxLDL; glutathione), homocysteine, vitamin B12, and folate. Results. After 3-months' chelation + Cellfood administration oxLDL decreased, ROS levels were significantly lower, and TAC and glutathione levels were significantly higher than after chelation + other antioxidants treatment, both in ND patients and in controls. Moreover, homocysteine metabolism had also improved in both groups. Conclusions. Chelation + Cellfood treatment was more efficient than chelation + other antioxidants improving oxidative status and homocysteine metabolism significantly in ND patients and controls. Although limited to a small number of cases, this study showed how helpful antioxidant treatment with Cellfood was in improving the subjects' metabolic conditions. PMID:25114898

  18. Methodological principles of selecting the main parameters of irrigation systems in a river basin in the semiarid region: statement of problem

    SciTech Connect

    Kurushkina, I.E.; Margolin, A.M.; Podol'skii, E.M.

    1986-03-01

    This article presents the methodological principles of substantiating irrigation land improvement and the main parameters of irrigation and supplemental water-supply systems ISS (irrigation areas, capacity of network, design availability, irrigation standard, etc.) as applied to river basins of the semiarid steppe zone. The main point in the methodological principles is the combined and, as far as possible, rigorous examination of all agroclimatic and technico-economic characteristics of irrigation with consideration of the probabilistic character of variations of precipitation, runoff, crop irrigation requirement, and their possible correlations. The development of methodological recommendations for solving the examined problems when conducting calculations both ''manually'' and with the use of computers will make it possible to increase the validity of designing and planning decisions and to reduce expenditures of labor and time.

  19. Tremelimumab (anti-CTLA4) mediates immune responses mainly by direct activation of T effector cells rather than by affecting T regulatory cells.

    PubMed

    Khan, Sameena; Burt, Deborah J; Ralph, Christy; Thistlethwaite, Fiona C; Hawkins, Robert E; Elkord, Eyad

    2011-01-01

    Cytotoxic T Lymphocyte Antigen 4 (CTLA4) blockade has shown antitumor activity against common cancers. However, the exact mechanism of immune mediation by anti-CTLA4 remains to be elucidated. Further understanding of how CTLA4 blockade with tremelimumab mediates immune responses may allow a more effective selection of responsive patients. Our results show that tremelimumab enhanced the proliferative response of T effector cells (Teff) upon TCR stimulation, and abrogated Treg suppressive ability. In the presence of tremelimumab, frequencies of IL-2-secreting CD4(+) T cells and IFN-?-secreting CD4(+) and CD8(+) T cells were increased in response to polyclonal activation and tumor antigens. Importantly, Treg frequency was not reduced in the presence of tremelimumab, and expanded Tregs in cancer patients treated with tremelimumab expressed FoxP3 with no IL-2 release, confirming them as bona fide Tregs. Taken together, this data indicates that tremelimumab induces immune responses mainly by direct activation of Teff rather than by affecting Tregs. PMID:21056008

  20. Comments on the Parameters and Processes that Affect the Preservation Potential and Style of Oblique-Divergent Plate Boundaries

    NASA Astrophysics Data System (ADS)

    Umhoefer, P. J.

    2014-12-01

    Oblique-divergent or transtensional zones present particular challenges in ancient belts because of the poor preservation potential of the thinned continental crust and young oceanic crust. Many oblique belts will preferentially preserve their boundary zones that lie within continents rather than the main plate boundary zone, which will be at a much lower elevation and composed of denser crust. Zones of tectonic escape or strike-slip overprinting of arcs or plateaus deform continental crust and may be better preserved. Here I highlight parameters and processes that have major effects on oblique divergent belts. Strain partitioning is common, but not ubiquitous, along and across oblique boundaries; the causes of partitioning are not always clear and make this especially vexing for work in ancient belts. Partitioning causes complexity in the patterns of structures at all scales. Inherited structures commonly determine the orientation and style of structures along oblique boundaries and can control the pattern of faults across transtensional belts. Regionally, inherited trends of arcs or other 1000-km-scale features can control boundary structures. Experiments and natural examples suggest that oblique boundary zones contain less of a record of strike-slip faulting and more extensional structures. The obliquity of divergence produces predictable families of structures that typify (i) strike-slip dominated zones (obliquity <~20°), (ii) mixed zones (~20° - ~35°), and (iii) extension dominated zones (>~35°). The combination of partitioning and mixed structures in oblique zones means that the boundaries of belts with large-magnitude strike-slip faulting will commonly preserve little of no record of that faulting history. Plate boundaries localize strain onto the main plate boundary structures from the broader plate boundary and therefore the boundary zones commonly preserve the earlier structures more than later structures, a major problem in interpreting ancient belts. Sediment input is critical in some oblique plate boundaries because these belts become more pronounced sediment sinks over time. The evolving topography of oblique boundaries means that they have great variability of sediment flux into differing parts of the system; large rivers enter these belts only in special circumstances.

  1. On the mechanism of seasonal and solar cycle NmF2 variations: A quantitative estimate of the main parameters contribution using incoherent scatter radar observations

    NASA Astrophysics Data System (ADS)

    Mikhailov, A. V.; Perrone, L.

    2011-03-01

    Seasonal (winter/summer) and solar cycle NmF2 variations as well as summer saturation effect in NmF2 have been analyzed using Millstone Hill incoherent scatter radar (ISR) daytime observations. A self-consistent approach to the Ne(h) modeling has been applied to extract from ISR observations a consistent set of main aeronomic parameters and to estimate their quantitative contribution to the observed NmF2 variations. The retrieved aeronomic parameters are independent of uncertainties in thermosphere and solar EUV empirical models, and this is a distinguishing feature of the present consideration. Different temperatures in winter and in summer in the course of solar cycle overlapped on the O+ + N2 reaction rate coefficient temperature dependence result in different NmF2 dependences on solar activity: a steep practically linear increase with a tendency to turn up in January (contrary to international reference ionosphere prediction) and a slow increase with a tendency to saturate at high solar activity in July despite increasing solar EUV irradiation. In winter the EUV flux and thermospheric parameters provide approximately equal contributions to the NmF2 increase, while in summer the contribution of thermospheric parameters is small. Both in winter and in summer the variations of atomic oxygen [O] are small at the F2 layer peak, and its contribution is small compared to linear loss coefficient, ?. It is shown that the summer saturation effect in NmF2 under high solar activity is not just reduced to O/N2 or EUV flux solar cycle variations but is determined by ? via the ?1 temperature dependence. A new mechanism (qualitative) to explain the December anomaly in NmF2 is proposed. It is based on the idea that the areas of atomic oxygen production and its loss are spatially separated and that time is required to transfer [O] from one area to the other where [O] associates in a three-body collision. Therefore, under a 7% increase in the O2 dissociation rate due to the Sun-Earth distance decrease in December-January compared to June-July, an accumulation of atomic oxygen should take place in the thermosphere in the vicinity of the December solstice resulting in a 21% NmF2 increase, which is close to the observed global December effect.

  2. An investigation of the optimization of parameters affecting the implementation of fourier transform spectroscopy at 20-500 micron from the C-141 airborne infrared observatory

    NASA Technical Reports Server (NTRS)

    Thompson, R. I.; Erickson, E. F.

    1976-01-01

    A program for 20-500 micron spectroscopy from the NASA flying C141 infrared observatory is being carried out with a Michelson interferometer. The parameters affecting the performance of the instrument are studied and an optimal configuration for high performance on the C-141 aircraft is recommended. As each parameter is discussed the relative merits of the two modes of mirror motion (rapid scan or step and integrate) are presented.

  3. Rock Mass Grouting in the Løren Tunnel: Case Study with the Main Focus on the Groutability and Feasibility of Drill Parameter Interpretation

    NASA Astrophysics Data System (ADS)

    Høien, Are Håvard; Nilsen, Bjørn

    2014-05-01

    The Løren road tunnel is a part of a major project at Ring road 3 in Oslo, Norway. The rock part of the tunnel is 915 m long and has two tubes with three lanes and breakdown lanes. Strict water ingress restriction was specified and continuous rock mass grouting was, therefore, carried out for the entire tunnel, which was excavated in folded Cambro-Silurian shales intruded by numerous dykes. This paper describes the rock mass grouting that was carried out for the Løren tunnel. Particular emphasis is placed on discussing grout consumption and the challenges that were encountered when passing under a distinct rock depression. Measurement while drilling (MWD) technology was used for this project, and, in this paper, the relationships between the drill parameter interpretation (DPI) factors water and fracturing are examined in relation to grout volumes. A lowering of the groundwater table was experienced during excavation under the rock depression, but the groundwater was nearly re-established after completion of the main construction work. A planned 80-m watertight concrete lining was not required to be built due to the excellent results from grouting in the rock depression area. A relationship was found between leakages mapped in the tunnel and the DPI water factor, indicating that water is actually present where the DPI water factor shows water in the rock. It is concluded that, for the Løren tunnel, careful planning and high-quality execution of the rock mass grouting made the measured water ingress meet the restrictions. For future projects, the DPI water factor may be used to give a better understanding of the material in which the rock mass grouting is performed and may also be used to reduce the time spent and volumes used when grouting.

  4. Identification of the main site factors and management intensity affecting the establishment of Short-Rotation-Coppices (SRC) in Northern Italy through stepwise regression analysis

    Microsoft Academic Search

    Sara Bergante; Gianni Facciotto; Gianfranco Minotta

    2010-01-01

    Data collected from 183 poplar and 102 willow SRC experimental plots, located in Central-North Italy, were subjected to stepwise\\u000a regression analysis to acquire information on the environmental factors affecting plant survival and productivity in the first\\u000a two-year rotation cycle. Nine Populus ×canadensis Mönch, eight P. deltoids Bartr. clones and four hybrids of Sali× matsudana Koidz were included in analysis. Independent

  5. Factors affecting the accuracy of determining the saturated synchronous machines cross-magnetizing parameters by the Finite Element Method

    Microsoft Academic Search

    A. M. El-Serafi; X. Liang; S. O. Faried

    2008-01-01

    The cross-magnetizing phenomenon of saturated synchronous machines plays an important role in their analysis using the two-axis frame models. To determine the parameters representing this phenomenon by the finite element method (FEM), the analysis has to be performed for excitations in the direct, quadrature and intermediate axes of the synchronous machines. This paper presents some investigations of the effect of

  6. Physical parameters affecting transient GUS gene expression in oil palm ( Elaeis guineensis Jacq.) using the biolistic device

    Microsoft Academic Search

    Ghulam Kadir A. Parveez; M. K. U. Chowdhury; Norihan M. Saleh

    1997-01-01

    Physical parameters for DNA delivery into oil palm embryogenic calli using the biolistic device have been successfully established. Helium pressures, distance from rupture disc to macrocarrier, distance from macrocarrier to stopping plate, distance from stopping plate to target tissue, vacuum pressures, number of bombardments, particle types and sizes and the effect of calcium chloride and spermidine on microcarrier-DNA binding have

  7. Parameters affecting the power distribution in the radio frequency discharge of large-area diffusion-cooled CO2 lasers

    Microsoft Academic Search

    A. Lapucci; S. Mascalchi; R. Ringressi

    1998-01-01

    An efficient power extraction from radio frequency (RF) excited CO 2 lasers can only be obtained by means of a uniform discharge power distribution. This distribution is mainly determined by the line-effect produced by the discharge structure. In this paper we report on a set of measurements performed on the luminosity of a large-area discharge showing the role played by

  8. The Parameters Affecting the Success of Irrigation and Debridement with Component Retention in the Treatment of Acutely Infected Total Knee Arthroplasty

    PubMed Central

    Kim, Jae Gyoon; Bae, Ji Hoon; Lee, Seung Yup; Cho, Won Tae

    2015-01-01

    Background The aims of our study were to evaluate the success rate of irrigation and debridement with component retention (IDCR) for acutely infected total knee arthroplasty (TKA) (< 4 weeks of symptom duration) and to analyze the factors affecting prognosis of IDCR. Methods We retrospectively reviewed 28 knees treated by IDCR for acutely infected TKA from 2003 to 2012. We evaluated the success rate of IDCR. All variables were compared between the success and failure groups. Multivariable logistic regression analysis was also used to examine the relative contribution of these parameters to the success of IDCR. Results Seventeen knees (60.7%) were successfully treated. Between the success and failure groups, there were significant differences in the time from primary TKA to IDCR (p = 0.021), the preoperative erythrocyte sedimentation rate (ESR; p = 0.021), microorganism (p = 0.006), and polyethylene liner exchange (p = 0.017). Multivariable logistic regression analysis of parameters affecting the success of IDCR demonstrated that preoperative ESR (odds ratio [OR], 1.02; p = 0.041), microorganism (OR, 12.4; p = 0.006), and polyethylene liner exchange (OR, 0.07; p = 0.021) were significant parameters. Conclusions The results show that 60.7% of the cases were successfully treated by IDCR for acutely infected TKA. The preoperative ESR, microorganism, and polyethylene liner exchange were factors that affected the success of IDCR in acutely infected TKA. PMID:25729521

  9. Genotyping-by-sequencing approach indicates geographic distance as the main factor affecting genetic structure and gene flow in Brazilian populations of Grapholita molesta (Lepidoptera, Tortricidae).

    PubMed

    Silva-Brandão, Karina Lucas; Silva, Oscar Arnaldo Batista Neto E; Brandão, Marcelo Mendes; Omoto, Celso; Sperling, Felix A H

    2015-06-01

    The oriental fruit moth Grapholita molesta is one of the major pests of stone and pome fruit species in Brazil. Here, we applied 1226 SNPs obtained by genotyping-by-sequencing to test whether host species associations or other factors such as geographic distance structured populations of this pest. Populations from the main areas of occurrence of G. molesta were sampled principally from peach and apple orchards. Three main clusters were recovered by neighbor-joining analysis, all defined by geographic proximity between sampling localities. Overall genetic structure inferred by a nonhierarchical amova resulted in a significant ?ST value = 0.19109. Here, we demonstrate for the first time that SNPs gathered by genotyping-by-sequencing can be used to infer genetic structure of a pest insect in Brazil; moreover, our results indicate that those markers are very informative even over a restricted geographic scale. We also demonstrate that host plant association has little effect on genetic structure among Brazilian populations of G. molesta; on the other hand, reduced gene flow promoted by geographic isolation has a stronger impact on population differentiation. PMID:26029261

  10. Genotyping-by-sequencing approach indicates geographic distance as the main factor affecting genetic structure and gene flow in Brazilian populations of Grapholita molesta (Lepidoptera, Tortricidae)

    PubMed Central

    Silva-Brandão, Karina Lucas; Silva, Oscar Arnaldo Batista Neto e; Brandão, Marcelo Mendes; Omoto, Celso; Sperling, Felix A H

    2015-01-01

    The oriental fruit moth Grapholita molesta is one of the major pests of stone and pome fruit species in Brazil. Here, we applied 1226 SNPs obtained by genotyping-by-sequencing to test whether host species associations or other factors such as geographic distance structured populations of this pest. Populations from the main areas of occurrence of G. molesta were sampled principally from peach and apple orchards. Three main clusters were recovered by neighbor-joining analysis, all defined by geographic proximity between sampling localities. Overall genetic structure inferred by a nonhierarchical amova resulted in a significant ?ST value = 0.19109. Here, we demonstrate for the first time that SNPs gathered by genotyping-by-sequencing can be used to infer genetic structure of a pest insect in Brazil; moreover, our results indicate that those markers are very informative even over a restricted geographic scale. We also demonstrate that host plant association has little effect on genetic structure among Brazilian populations of G. molesta; on the other hand, reduced gene flow promoted by geographic isolation has a stronger impact on population differentiation. PMID:26029261

  11. Heat flow parameters affecting dendrite spacings during unsteady-state solidification of Sn-Pb and Al-Cu alloys

    Microsoft Academic Search

    Otávio L. Rocha; Cláudio A. Siqueira; Amauri Garcia

    2003-01-01

    Solidification thermal parameters and dendrite arm spacings have been measured in hypoeutectic Sn-Pb and Al-Cu alloys solidified\\u000a under unsteady-state heat flow conditions. It was observed that both primary and secondary spacings decreased with increased\\u000a solute content for Sn-Pb alloys. For Al-Cu alloys, the primary spacing was found to be independent of composition, and secondary\\u000a spacings decrease as the solute content

  12. Study of some parameters which affect xylanase production: Strain selection, enzyme extraction optimization, and influence of drying conditions

    Microsoft Academic Search

    Giselle Maria Maciel; Luciana Porto de Souza Vandenberghe; Ricardo Cancio Fendrich; Bianca Eli Della Bianca; Charles Windson Isidoro Haminiuk; Carlos Ricardo Soccol

    2009-01-01

    Xylanases are glycosidases mainly responsible for the hydrolysis of ?-1,4 linkages in xylan. Xylanase was produced in this\\u000a work by solid-state fermentation using agro industrial residues with Aspergillus niger strain, which was screened through qualitative and quantitative methods. Extraction processes with different solvents were\\u000a evaluated. Solvent volume, time, and agitation speed (shaker) were optimized using statistical designs. Drying studies of

  13. How parameters and regularization affect the Polyakov-Nambu-Jona-Lasinio model phase diagram and thermodynamic quantities

    SciTech Connect

    Costa, P. [Centro de Fisica Computacional, Departamento de Fisica, Universidade de Coimbra, P-3004-516 Coimbra (Portugal) and E.S.T.G., Instituto Politecnico de Leiria, Morro do Lena-Alto do Vieiro, 2411-901 Leiria (Portugal); Hansen, H. [IPNL, Universite de Lyon/Universite Lyon 1, CNRS/IN2P3, 4 rue E.Fermi, F-69622 Villeurbanne Cedex (France); Ruivo, M. C.; Sousa, C. A. de [Centro de Fisica Computacional, Departamento de Fisica, Universidade de Coimbra, P-3004-516 Coimbra (Portugal)

    2010-01-01

    We explore the phase diagram and the critical behavior of QCD thermodynamic quantities in the context of the so-called Polyakov-Nambu-Jona-Lasinio model. We show that this improved field theoretical model is a successful candidate for studying the equation of state and the critical behavior around the critical endpoint. We argue that a convenient choice of the model parameters is crucial to get the correct description of isentropic trajectories. The effects of the regularization procedure in several thermodynamic quantities is also analyzed. The results are compared with simple thermodynamic expectations and lattice data.

  14. The role of mechanical properties in cavitation erosion resistance. [parameters affecting metal fatigue under cavitation flow conditions

    NASA Technical Reports Server (NTRS)

    Gould, G. C.

    1974-01-01

    Methods for determining the correlations of erosion resistance and mechanical properties of materials are discussed. The most common method of testing cavitation erosion resistance of materials is the vibratory cavitation probe. The instrument and its operation are described. The use of the whirling arm device is considered as a second method. Metallographic investigations of the earliest stages of cavitation erosion damage of metallic materials was conducted. The materials show plastic deformation occurring during the incubation period and increasing until cracks form and metal fragments are lost. The parameters of the work done to cause material fractures are identified. The reactions obtained with specific materials are reported.

  15. Determination and Analysis of the main physical parameters of the asteroid (2717) Tellervo. (Italian Title: Determinazione ed Analisi dei principali parametri fisici dell'asteroide (2717) Tellervo)

    NASA Astrophysics Data System (ADS)

    Tomassini, A.; Scardella, M.; Lacaprara, G.

    2013-02-01

    The "ATA Research Group" has undertaken an observation campaign (started at the end of 2011 with several preliminary sessions) oriented to little-known asteroids main properties determination (synodic period, size, possible taxonomic class). This study has been focused on the asteroid (2717) Tellervo belonging to the Main Belt. This work would be an example and an incentive to other non-professional Association to develop a field where the amateur Astronomers can provide a remarkable role to the knowledge of these more and more interesting Solar System objects.

  16. Critical rearing parameters of Tetrastichus planipennisi (Hymenoptera: Eulophidae) as affected by host plant substrate and host-parasitoid group structure.

    PubMed

    Duan, Jian J; Oppel, Craig

    2012-06-01

    In laboratory assays, we evaluated the potential impact of host plant substrate types, host-parasitoid group sizes (densities), and parasitoid-to-host ratios on select fitness parameters of the larval endoparasitoid Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae), newly introduced for biological control of emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), in the United States. Results from our study showed that offspring production and critical fitness parameters (body size and sex ratio) of T. planipennisi from parasitized emerald ash borer larvae are significantly influenced by host plant substrate type, host-parasitoid group size, parasitoid-to-host ratio, or a combination in the primary exposure assay. The number of both female and male T. planipennisi progeny was significantly greater when emerald ash borer larvae were inserted into tropical ash [Fraxinus uhdei (Wenz.) Lingelsh.] logs rather than green ash (Fraxinus pensylvanica Marshall). When maintained at a constant 1:1 parasitoid-to-host ratio, assays with larger host-parasitoid group sizes (3:3-12:12) produced significantly greater numbers of both male and female offspring per parental wasp compared with those with the single host-parasitoid (1:1) group treatment. As the parasitoid-to-host ratio increased from 1:1 to 8:1 in the assay, the average brood size (number of offspring per parasitized emerald ash borer larva) increased significantly, whereas the average brood sex ratio (female to male) changed from being female-biased (6:1) to male-biased (1:2); body size of female offspring as measured by the length of ovipositor and left hind tibia also was reduced significantly. Based on these findings, we suggest that the current method of rearing T. planipennisi with artificially infested-emerald ash borer larvae use the tropical ash logs for emerald ash borer insertion, a larger (> or = 3:3) host-parasitoid group size and 1:1 parasitoid-to-host ratio in the primary parasitoid exposure assays. PMID:22812114

  17. A weak pulsed magnetic field affects adenine nucleotide oscillations, and related parameters in aggregating Dictyostelium discoideum amoebae.

    PubMed

    Davies, E; Olliff, C; Wright, I; Woodward, A; Kell, D

    1999-02-01

    A model eukaryotic cell system was used to explore the effect of a weak pulsed magnetic field (PMF) on time-varying physiological parameters. Dictyostelium discoideum cells (V12 strain) were exposed to a pulsed magnetic field (PMF) of flux density 0.4 mT, generated via air-cored coils in trains of 2 ms pulses gated at 20 ms. This signal is similar to those used to treat non-uniting fractures. Samples were taken over periods of 20 min from harvested suspensions of amoebae during early aggregation phase, extracted and derivatised for HPLC fluorescent assay of adenine nucleotides. Analysis of variance showed a significant athermal damping effect (P < 0.002, n = 22) of the PMF on natural adenine nucleotide oscillations and some consistent changes in phase relationships. The technique of nonlinear dielectric spectroscopy (NLDS) revealed a distinctive effect of PMF, caffeine and EGTA in modulating the cellular harmonic response to an applied weak signal. Light scattering studies also showed altered frequency response of cells to PMF, EGTA and caffeine. PMF caused a significant reduction of caffeine induced cell contraction (P < 0.0006, n = 19 by paired t-test) as shown by Malvern particle size analyser, suggesting that intracellular calcium may be involved in mediating the effect of the PMF. PMID:10228582

  18. Visual display of reservoir parameters affecting enhanced oil recovery. Second quarterly report, [January 1, 1994--March 31, 1994

    SciTech Connect

    Wood, J.R.

    1994-04-01

    This project will provide a detailed example, based on a field trail, of how to evaluate a field for enhanced oil recovery (EOR) operations utilizing data typically available in a field that has undergone primary development. The approach will utilize readily available, affordable computer software and analytical services. This study will illustrate the steps involved in (1) integration of data typically available for gas and oil fields with predictive models for reservoir alteration and (2) linking these data and models with modem computer software to provide 2- and 3-D visualizations of reservoir geometry, facies and subsurface, stratigraphy, original oil in place, present (estimated) oil in place, and measured and model parameters. The Michigan Technological University (MTU) group continued work on sample measurement and prepared for technology transfer of results at the June AAPG meeting in Denver D. Schueler is developing a program to store and display the results of our project in an interactive format using the MacroMind Director multimedia program. All project data, results and reports will be integrated in this medium and the final product will be a CD ROM which can be distributed to interested parties as part of our technology transfer effort. X-ray Diffraction (XRD: R. Kramer) and Fourier Transform Infrared Spectroscopy (FTIR: N. Popko) analysis of samples from one of the Pioneer wells have begun and spreadsheets and graphics to record and display the results have been developed.

  19. The Transiting Exoplanet Host Star GJ 436: A Test of Stellar Evolution Models in the Lower Main Sequence, and Revised Planetary Parameters

    Microsoft Academic Search

    Guillermo Torres

    2007-01-01

    Knowledge of the stellar parameters for the parent stars of transiting exoplanets is a prerequisite for establishing the planet properties themselves, and often relies on stellar evolution models. GJ 436, which is orbited by a transiting Neptune-mass object, presents a difficult case because it is an M dwarf. Stellar models in this mass regime are not as reliable as for

  20. Behaviour of Main Microbiological Parameters And of Enteric Microorganisms During the Composting of Municipal Solid Wastes and Sewage Sludge in A Semi-Industrial Composting Plant

    Microsoft Academic Search

    Olfa Fourti; Naceur Jedidi; Abdenaceur Hassen

    2008-01-01

    This study was focused on the microbiological aspects of composting and on the behaviour of main prevalent microbial communities (non-pathogenic and selected pathogenic bacteria) during the composting process of municipal solid wastes and sewage sludge in a semi-industrial composting plant. Results showed that the dehydrogenase activity and Biomass C \\/ Biomass N ratio showed a noticeable increase in the two

  1. Salt ions and related parameters affect PEI-DNA particle size and transfection efficiency in Chinese hamster ovary cells.

    PubMed

    Sang, Yunxia; Xie, Kui; Mu, Yubin; Lei, Yun; Zhang, Baohong; Xiong, Sheng; Chen, Yantian; Qi, Nianmin

    2015-01-01

    Transfection efficiency is directly associated with the expression level and quantity of recombinant protein after the transient transfection of animal cells. The transfection process can be influenced by many still-unknown factors, so it is valuable to study the precise mechanism and explore these factors in gene delivery. Polyethylenimine (PEI) is considered to have high transfection efficiency and endosome-disrupting capacity. Here we aimed to investigate optimal conditions for transfection efficiency by setting different parameters, including salt ion concentration, DNA/PEI ratio, and incubation time. We examined the PEI-DNA particle size using a Malvern particle size analyzer and assessed the transfection efficiency using flow cytometry in Chinese hamster ovary-S cells. Salt ions, higher amounts of PEI tended to improve the aggregation of PEI-DNA particles and the particle size of PEI-DNA complexes and the transfection efficiency were increased. Besides, the particle size was also found to benefit from longer incubation time. However, the transfection efficiency increased to maximum of 68.92 % at an incubation time of 10 min, but decreased significantly thereafter to 23.71 %, when incubating for 120 min (P < 0.05). Besides, PEI-DNA complexes formed in salt-free condition were unstable. Our results suggest DNA and PEI incubated in 300 mM NaCl at a ratio of 1:4 for 10 min could achieve the optimal transfection efficiency. Our results might provide guidance for the optimization of transfection efficiency and the industrial production of recombinant proteins. PMID:24166598

  2. MAINE AQUIFERS

    EPA Science Inventory

    AQFRS24 contains polygons of significant aquifers in Maine (glacial deposits that are a significant ground water resource) mapped at a scale 1:24,000. This statewide coverage was derived from aquifer boundaries delineated and digitized by the Maine Geological Survey from data com...

  3. Technical parameters influencing the severity of injury of front-seat, belt-protected car passengers on the impact side in car-to-car side collisions with the main impact between the front and rear seats (B-pillars)

    Microsoft Academic Search

    E. Miltner; H. P. Wiedmann; B. Leutwein; H.-P. Hepp; R. Fischer; H. J. Salwender; H. Frobenius; D. Kallieris

    1992-01-01

    Summary Authentic car-to-car side collisions (n = 30) with the main impact area at the B-pillar were analyzed to find technical parameters corresponding with the injury severities of the front seat, belt-protected car passengers on the impact side. EES (Energy Equivalent Speed) and Av (delta v, change in velocity) were highly significant predictors of the severity of thoracic and abdominal

  4. MAINE HYDROGRAPHY

    EPA Science Inventory

    Hydronet_me24 and Hydropoly_me24 depict Maine's hydrography data, based on 8-digit hydrological unit codes (HUC's) at the 1:24,000 scale. Some New Hampshire and New Brunswick hydrography data are also included. The NHD hydrography data was compiled from previous ArcIn...

  5. Investigating how fundamental parameters of XRF sample preparation and analysis affect the observed elemental concentration: an experiment using fluvial sediment from Sabah, Borneo.

    NASA Astrophysics Data System (ADS)

    Higton, Sam; Walsh, Rory

    2015-04-01

    X-Ray Fluorescence (XRF) is an important technique for measuring the concentrations of geochemical elements and inorganic contaminants adsorbed to sediments as an input to sediment tracing methods used to evaluate sediment transport dynamics in river catchments. In addition to traditional laboratory-based XRF instruments, the advent of increasingly advanced portable handheld XRF devices now mean that samples of fluvial sediment can be analysed in the field or in the laboratory following appropriate sample preparation procedures. There are limitations and sources of error associated with XRF sample preparation and analysis, however. It is therefore important to understand how fundamental parameters involved in sample preparation and analysis, such as sample compression and measurement exposure duration, affect observed variability in measurement results. Such considerations become important if the resulting measurement variability is high relative to the natural variability in element concentrations at a sample site. This paper deployed a simple experimental design to assess the impacts of varying a number of sample preparation and XRF analysis parameters on recorded measurements of elemental concentrations of the fine fraction (<63um) of bed-sediment samples. Specifically the study compared observed elemental concentrations measured using a Rigaku NEX-CG laboratory machine versus a handheld Niton XL3t-900 XRF elemental analyser. Helium purging was used on both machines to enable measurement of lighter geochemical elements. Sediment sub-samples were taken from a larger homogenised sample from a sediment core taken from an in-channel lateral bench deposit of the Brantian river in Sabah, Borneo; the core site is being used for research into multi-proxy sediment fingerprinting as part of the Stability of Altered Forest Ecosystems (SAFE) project. Some fundamental sample preparation procedures consistent with US EPA Method 6200 were applied to all sediment samples in order to explore key variables of interest. All sediment samples were air-dried to constant weight and sample quantity was sufficient to satisfy the assumption of 'infinite thickness' of sample. Standard plastic sample cups were used for both the Rigaku laboratory machine and the Niton portable XRF machine. A computer-controlled desktop laboratory stand was used in conjunction with the Niton handheld XRF analyser to ensure consistent repeated measurements. Parameters investigated related to sample preparation included consistent mechanical compression of samples within the sample cup and film thickness. Parameters investigated related to XRF analysis included the XRF machine selected and measurement exposure duration. As XRF is a non-destructive technique, wherever possible the same sample material was used to test different parameters, so as to reduce variations due to the heterogeneous nature of sediment. Observed XRF measurements demonstrate how the precision and relative accuracy of elemental concentrations of sediment can be affected by the XRF analyser selected as well as fundamental parameters of sample preparation and analysis procedure. This has implications for studies where comparability and repeatability of measurements is important. Furthermore, the heterogeneous nature of sediments over small spatial scales means that it is important to understand the levels of variability in elemental concentrations resulting from variations in sample preparation and analysis procedures.

  6. Do organic solvents affect the catalytic properties of lipase? Intrinsic kinetic parameters of lipases in ester hydrolysis and formation in various organic solvents

    SciTech Connect

    Tol, J.B.A. van; Stevens, R.M.M.; Veldhuizen, W.J.; Jongejan, J.A.; Duine, J.A. [Delft Univ. of Technology (Netherlands)

    1995-07-05

    When it is assumed that organic solvents do not interfere with the binding process nor with the catalytic mechanism, the contribution of substrate-solvent interactions to enzyme kinetics can be accounted for by just replacing substrate concentrations in the equations by thermodynamic activities. It appears from the transformation that only the affinity parameters (K{sub m},k{sub sp}) are affected by this. Thus, in theory, the values of these corrected, intrinsic parameters (K{sub m}{sup int}, k{sub sp}{sup int}) and the maximal rate (V{sub 1}) should be equal for all media. This was tested for hydrolysis, transesterification, and esterification reactions catalyzed by pig pancreas lipase and Pseudomonas cepacia lipase in various organic solvents. Correction was carried out via experimentally determined activity coefficients for the substrates in these solvents or, if not feasible, from values in data bases. However, although the kinetic performances of each enzyme in the solvents became much more similar after correction, differences still remained. Analysis of the enzyme suspensions revealed massive particles, which explains the low activity of enzymes in organic solvents. However, no correlation was found between estimates of the amount of catalytically available enzyme (present at the surface of suspended particles or immobilized on beads) and the maximal rates observed. Moreover, the solvents had similar effects on the intrinsic parameters of suspended and immobilized enzyme. The possible causes for the effects of the solvents on the catalytic performance of the enzymes, remaining after correction for solvent-substrate interactions and the amount of participating enzyme, are discussed with respect to the premises on which the correction method is based.

  7. Comparison of mathematical models applied to f1 dairy sheep lactations in organic farm and environmental factors affecting lactation curve parameter.

    PubMed

    Angeles-Hernandez, J C; Albarran-Portillo, B; Gomez Gonzalez, A V; Pescador Salas, N; Gonzalez-Ronquillo, M

    2013-08-01

    THE OBJECTIVE OF THIS STUDY WAS TO COMPARE THE GOODNESS OF FIT OF FOUR LACTATION CURVE MODELS: Wood's Gamma model (WD), Wilmink (WL), and Pollott's multiplicative two (POL2) and three parameters (POL3) and to determine the environmental factors affecting the complete lactation curve of F1 dairy sheep under organic management. A total of 5,382 weekly milk yields records from 150 ewes, under organic management were used. Residual mean square (RMS), determination coefficients (R(2)), and correlation (r) analysis were used as an indicator of goodness of fit for each model. WL model best fitted the lactation curves as indicated by the lower RMS values (0.019), followed by WD (0.023), POL2 (0.025) and POL3 (0.029). The four models provided total milk yield (TMY) estimations that were highly correlated (0.93 to 0.97) with observed TMY (89.9 kg). The four models under estimated peak yield (PY), whereas POL2 and POL3 gave nearer peak time lactation estimations. Ewes lambing in autumn had higher TMY and showed a typical curve shape. Higher TMY were recorded in second and third lambing. Season of lambing, number of lambing and type of lambing had a great influenced over TMY shaping the complete lactation curve of F1 dairy sheep. In general terms WL model showed the best fit to the F1 dairy sheep lactation curve under organic management. PMID:25049892

  8. Comparison of Mathematical Models Applied to F1 Dairy Sheep Lactations in Organic Farm and Environmental Factors Affecting Lactation Curve Parameter

    PubMed Central

    Angeles-Hernandez, J. C.; Albarran-Portillo, B.; Gomez Gonzalez, A. V.; Pescador Salas, N.; Gonzalez-Ronquillo, M.

    2013-01-01

    The objective of this study was to compare the goodness of fit of four lactation curve models: Wood’s Gamma model (WD), Wilmink (WL), and Pollott’s multiplicative two (POL2) and three parameters (POL3) and to determine the environmental factors affecting the complete lactation curve of F1 dairy sheep under organic management. A total of 5,382 weekly milk yields records from 150 ewes, under organic management were used. Residual mean square (RMS), determination coefficients (R2), and correlation (r) analysis were used as an indicator of goodness of fit for each model. WL model best fitted the lactation curves as indicated by the lower RMS values (0.019), followed by WD (0.023), POL2 (0.025) and POL3 (0.029). The four models provided total milk yield (TMY) estimations that were highly correlated (0.93 to 0.97) with observed TMY (89.9 kg). The four models under estimated peak yield (PY), whereas POL2 and POL3 gave nearer peak time lactation estimations. Ewes lambing in autumn had higher TMY and showed a typical curve shape. Higher TMY were recorded in second and third lambing. Season of lambing, number of lambing and type of lambing had a great influenced over TMY shaping the complete lactation curve of F1 dairy sheep. In general terms WL model showed the best fit to the F1 dairy sheep lactation curve under organic management. PMID:25049892

  9. The dynamics of phase partition. A study of parameters affecting rat liver organelle partitioning in aqueous two-polymer phase systems.

    PubMed Central

    Heywood-Waddington, D; Peters, T J; Sutherland, I A

    1986-01-01

    Separation of subcellular organelles by two-phase partition is thought to reflect differential partition of the organelles between the two phases or between one of the phases and the interface. Studies by Fisher and colleagues [Fisher & Walter (1984) Biochim. Biophys. Acta 801, 106-110] suggest that cell separation by phase partition is a dynamic process in which the partition changes with time. This is mainly due to association of the cells with sedimenting droplets of one phase in the bulk of the other. Rat liver organelle partition was studied to determine whether the same dynamic behaviour is observed. Partition was clearly time-dependent during 24 h at unit gravity, and was also affected by altering the volume ratio of the two phases and the duration of phase mixing. These results indicate that, as with cells, the partition of organelles between phases is a dynamic process, and is consistent with the demonstration that organelles adhere to the phase droplet surfaces. Optimization of the volume ratio between phases may lead to significant processing economies. Organelle sedimentation in the upper phase was significantly faster than in the isoosmotic sucrose. Theoretical modelling of apparent organelle sizes indicates that aggregation occurs in the poly(ethylene glycol)-rich upper phase. This phenomenon is likely to limit the use of this technique in organelle separations unless means can be found to decrease aggregation. Images Fig. 6. PMID:2874790

  10. Primordial Spectrum and Cosmological Parameters

    NASA Astrophysics Data System (ADS)

    Shafieloo, Arman; Hazra, Dhiraj Kumar; Souradeep, Tarun

    The observables of the perturbed Universe, cosmic microwave background (CMB) anisotropy and large scale structures depend on background cosmological parameters, as well as the form of primordial perturbations. Main cosmological parameters are usually constrained using CMB or large scale structure data based on power-law assumption of the primordial power spectrum (PPS). However while there is no any preferred model for the early universe, this assumption raises a concern that current estimated cosmological parameters are prejudiced by the power-law assumption of primordial spectrum. In this paper we demonstrate that assuming a free form of the primordial spectrum can affect significantly the estimated values of the cosmological parameters.

  11. Main Report

    PubMed Central

    2006-01-01

    Background: States vary widely in their use of newborn screening tests, with some mandating screening for as few as three conditions and others mandating as many as 43 conditions, including varying numbers of the 40+ conditions that can be detected by tandem mass spectrometry (MS/MS). There has been no national guidance on the best candidate conditions for newborn screening since the National Academy of Sciences report of 19751 and the United States Congress Office of Technology Assessment report of 1988,2 despite rapid developments since then in genetics, in screening technologies, and in some treatments. Objectives: In 2002, the Maternal and Child Health Bureau (MCHB) of the Health Resources and Services Administration (HRSA) of the United States Department of Health and Human Services (DHHS) commissioned the American College of Medical Genetics (ACMG) to: Conduct an analysis of the scientific literature on the effectiveness of newborn screening.Gather expert opinion to delineate the best evidence for screening for specified conditions and develop recommendations focused on newborn screening, including but not limited to the development of a uniform condition panel.Consider other components of the newborn screening system that are critical to achieving the expected outcomes in those screened. Methods: A group of experts in various areas of subspecialty medicine and primary care, health policy, law, public health, and consumers worked with a steering committee and several expert work groups, using a two-tiered approach to assess and rank conditions. A first step was developing a set of principles to guide the analysis. This was followed by developing criteria by which conditions could be evaluated, and then identifying the conditions to be evaluated. A large and broadly representative group of experts was asked to provide their opinions on the extent to which particular conditions met the selected criteria, relying on supporting evidence and references from the scientific literature. The criteria were distributed among three main categories for each condition: The availability and characteristics of the screening test;The availability and complexity of diagnostic services; andThe availability and efficacy of treatments related to the conditions. A survey process utilizing a data collection instrument was used to gather expert opinion on the conditions in the first tier of the assessment. The data collection format and survey provided the opportunity to quantify expert opinion and to obtain the views of a diverse set of interest groups (necessary due to the subjective nature of some of the criteria). Statistical analysis of data produced a score for each condition, which determined its ranking and initial placement in one of three categories (high scoring, moderately scoring, or low scoring/absence of a newborn screening test). In the second tier of these analyses, the evidence base related to each condition was assessed in depth (e.g., via systematic reviews of reference lists including MedLine, PubMed and others; books; Internet searches; professional guidelines; clinical evidence; and cost/economic evidence and modeling). The fact sheets reflecting these analyses were evaluated by at least two acknowledged experts for each condition. These experts assessed the data and the associated references related to each criterion and provided corrections where appropriate, assigned a value to the level of evidence and the quality of the studies that established the evidence base, and determined whether there were significant variances from the survey data. Survey results were subsequently realigned with the evidence obtained from the scientific literature during the second-tier analysis for all objective criteria, based on input from at least three acknowledged experts in each condition. The information from these two tiers of assessment was then considered with regard to the overriding principles and other technology or condition-specific recommendations. On the basis of this information, conditions were assigned to one of thr

  12. The VLT-FLAMES Tarantula Survey. XIX. B-type supergiants: Atmospheric parameters and nitrogen abundances to investigate the role of binarity and the width of the main sequence

    NASA Astrophysics Data System (ADS)

    McEvoy, C. M.; Dufton, P. L.; Evans, C. J.; Kalari, V. M.; Markova, N.; Simón-Díaz, S.; Vink, J. S.; Walborn, N. R.; Crowther, P. A.; de Koter, A.; de Mink, S. E.; Dunstall, P. R.; Hénault-Brunet, V.; Herrero, A.; Langer, N.; Lennon, D. J.; Maíz Apellániz, J.; Najarro, F.; Puls, J.; Sana, H.; Schneider, F. R. N.; Taylor, W. D.

    2015-03-01

    Context. Model atmosphere analyses have been previously undertaken for both Galactic and extragalactic B-type supergiants. By contrast, little attention has been given to a comparison of the properties of single supergiants and those that are members of multiple systems. Aims: Atmospheric parameters and nitrogen abundances have been estimated for all the B-type supergiants identified in the VLT-FLAMES Tarantula survey. These include both single targets and binary candidates. The results have been analysed to investigate the role of binarity in the evolutionary history of supergiants. Methods: tlusty non-local thermodynamic equilibrium (LTE) model atmosphere calculations have been used to determine atmospheric parameters and nitrogen abundances for 34 single and 18 binary supergiants. Effective temperatures were deduced using the silicon balance technique, complemented by the helium ionisation in the hotter spectra. Surface gravities were estimated using Balmer line profiles and microturbulent velocities deduced using the silicon spectrum. Nitrogen abundances or upper limits were estimated from the N ii spectrum. The effects of a flux contribution from an unseen secondary were considered for the binary sample. Results: We present the first systematic study of the incidence of binarity for a sample of B-type supergiants across the theoretical terminal age main sequence (TAMS). To account for the distribution of effective temperatures of the B-type supergiants it may be necessary to extend the TAMS to lower temperatures. This is also consistent with the derived distribution of mass discrepancies, projected rotational velocities and nitrogen abundances, provided that stars cooler than this temperature are post-red supergiant objects. For all the supergiants in the Tarantula and in a previous FLAMES survey, the majority have small projected rotational velocities. The distribution peaks at about 50 km s-1 with 65% in the range 30 km s-1 ? vesini ? 60 km s-1. About ten per cent have larger vesini (?100 km s-1), but surprisingly these show little or no nitrogen enhancement. All the cooler supergiants have low projected rotational velocities of ?70 km s-1and high nitrogen abundance estimates, implying that either bi-stability braking or evolution on a blue loop may be important. Additionally, there is a lack of cooler binaries, possibly reflecting the small sample sizes. Single-star evolutionary models, which include rotation, can account for all of the nitrogen enhancement in both the single and binary samples. The detailed distribution of nitrogen abundances in the single and binary samples may be different, possibly reflecting differences in their evolutionary history. Conclusions: The first comparative study of single and binary B-type supergiants has revealed that the main sequence may be significantly wider than previously assumed, extending to Teff = 20 000 K. Some marginal differences in single and binary atmospheric parameters and abundances have been identified, possibly implying non-standard evolution for some of the sample. This sample as a whole has implications for several aspects of our understanding of the evolutionary status of blue supergiants. Tables 1, 4, 7 are available in electronic form at http://www.aanda.org

  13. On the factors affecting the dissolution of copper in molten lead-free solders and development of a method to assess the soldering parameters

    Microsoft Academic Search

    D. Di Maio; C. P. Hunt

    2009-01-01

    Purpose – The purpose of this paper is to investigate the various factors that influence the dissolution of copper in molten solder, paying particular attention to important parameters: temperature, solder composition and flow rate. Design\\/methodology\\/approach – To determine the dissolution rate of copper in lead-free solders, a simple and automated technique is developed. This methodology provides repeatable measurements that allow

  14. Red band needle blight is an economically important disease affecting a number of coniferous trees, in particular pines. The disease has a world-wide distribution but until recently it was mainly of concern in the southern

    E-print Network

    Red band needle blight is an economically important disease affecting a number of coniferous trees septosporum. Red band needle blight causes premature needle defoliation which results in the loss of timber susceptible species in future rotations. Red band needle blight of conifers in Britain Research Note Anna

  15. Aquarius Main Structure Configuration

    NASA Technical Reports Server (NTRS)

    Eremenko, Alexander

    2012-01-01

    The Aquarius/SAC-D Observatory is a joint US-Argentine mission to map the salinity at the ocean surface. This information is critical to improving our understanding of two major components of Earth's climate system - the water cycle and ocean circulation. By measuring ocean salinity from space, the Aquarius/SAC-D Mission will provide new insights into how the massive natural exchange of freshwater between the ocean, atmosphere and sea ice influences ocean circulation, weather and climate. Aquarius is the primary instrument on the SAC-D spacecraft. It consists of a Passive Microwave Radiometer to detect the surface emission that is used to obtain salinity and an Active Scatterometer to measure the ocean waves that affect the precision of the salinity measurement. The Aquarius Primary Structure houses instrument electronics, feed assemblies, and supports a deployable boom with a 2.5 m Reflector, and provides the structural interface to the SAC-D Spacecraft. The key challenge for the Aquarius main structure configuration is to satisfy the needs of component accommodations, ensuring that the instrument can meet all operational, pointing, environmental, and launch vehicle requirements. This paper describes the evolution of the Aquarius main structure configuration, the challenges of balancing the conflicting requirements, and the major configuration driving decisions and compromises.

  16. Evaluation of experimental design and computational parameter choices affecting analyses of ChIP-seq and RNA-seq data in undomesticated poplar trees

    PubMed Central

    2014-01-01

    Background One of the great advantages of next generation sequencing is the ability to generate large genomic datasets for virtually all species, including non-model organisms. It should be possible, in turn, to apply advanced computational approaches to these datasets to develop models of biological processes. In a practical sense, working with non-model organisms presents unique challenges. In this paper we discuss some of these challenges for ChIP-seq and RNA-seq experiments using the undomesticated tree species of the genus Populus. Results We describe specific challenges associated with experimental design in Populus, including selection of optimal genotypes for different technical approaches and development of antibodies against Populus transcription factors. Execution of the experimental design included the generation and analysis of Chromatin immunoprecipitation-sequencing (ChIP-seq) data for RNA polymerase II and transcription factors involved in wood formation. We discuss criteria for analyzing the resulting datasets, determination of appropriate control sequencing libraries, evaluation of sequencing coverage needs, and optimization of parameters. We also describe the evaluation of ChIP-seq data from Populus, and discuss the comparison between ChIP-seq and RNA-seq data and biological interpretations of these comparisons. Conclusions These and other "lessons learned" highlight the challenges but also the potential insights to be gained from extending next generation sequencing-supported network analyses to undomesticated non-model species. PMID:25081589

  17. Physicochemical parameters affecting liposomal bisphosphonates bioactivity for restenosis therapy: internalization, cell inhibition, activation of cytokines and complement, and mechanism of cell death.

    PubMed

    Epstein-Barash, Hila; Gutman, Dikla; Markovsky, Ela; Mishan-Eisenberg, Galit; Koroukhov, Nickolay; Szebeni, Janos; Golomb, Gershon

    2010-09-01

    Partial inactivation and transient depletion of monocytes/macrophages by liposomal bisphosphonates (LIP-BPs) is widely experimented in various inflammatory disorders including restenosis. Previous studies on activation of cytokines by LIP-BPs are limited to certain cell lines. Moreover, the correlation between in vitro and in vivo studies and complement (C) activation has not been reported. We report here a comprehensive study on the bioactivity of LIP-BPs on various cells' internalization and proliferation, mechanism of cell death, cytokines (in vitro and in vivo) and C activation (in the rat, rabbit and pig). The role of the following parameters has been determined i) drug type (clodronate/alendronate); ii) vesicles size (60-800nm); iii) charge (neutral/negative/ positive); and iv) cell culture type (various cell lines and primary cultures). It was found that monocyte/macrophage inhibition and cytokine activation depend on the cell type, with a limited correlation to the bioactivity obtained in the rat and rabbit models of restenosis. Negatively charged liposomes (85+/-20nm) effectively depleted rabbit's monocytes (67% depletion), with a minor activation of cytokines and no C activation. It is concluded that cell culture studies are insufficient for assessing cytokine activation, and that by controlling LIP-BP properties (size, charge and drug type) optimal bioactivity could be achieved. PMID:20359513

  18. Parameters affecting the stability of the digestate from a two-stage anaerobic process treating the organic fraction of municipal solid waste

    SciTech Connect

    Trzcinski, Antoine P., E-mail: a.trzcinski05@ic.ac.uk [Department of Chemical Engineering, Imperial College of Science and Technology and Medicine, Prince Consort Road, London SW7 2AZ (United Kingdom); Stuckey, David C., E-mail: d.stuckey@ic.ac.uk [Department of Chemical Engineering, Imperial College of Science and Technology and Medicine, Prince Consort Road, London SW7 2AZ (United Kingdom)

    2011-07-15

    This paper focused on the factors affecting the respiration rate of the digestate taken from a continuous anaerobic two-stage process treating the organic fraction of municipal solid waste (OFMSW). The process involved a hydrolytic reactor (HR) that produced a leachate fed to a submerged anaerobic membrane bioreactor (SAMBR). It was found that a volatile solids (VS) removal in the range 40-75% and an operating temperature in the HR between 21 and 35 {sup o}C resulted in digestates with similar respiration rates, with all digestates requiring 17 days of aeration before satisfying the British Standard Institution stability threshold of 16 mg CO{sub 2} g VS{sup -1} day{sup -1}. Sanitization of the digestate at 65 {sup o}C for 7 days allowed a mature digestate to be obtained. At 4 g VS L{sup -1} d{sup -1} and Solid Retention Times (SRT) greater than 70 days, all the digestates emitted CO{sub 2} at a rate lower than 25 mg CO{sub 2} g VS{sup -1} d{sup -1} after 3 days of aeration, while at SRT lower than 20 days all the digestates displayed a respiration rate greater than 25 mg CO{sub 2} g VS{sup -1} d{sup -1}. The compliance criteria for Class I digestate set by the European Commission (EC) and British Standard Institution (BSI) could not be met because of nickel and chromium contamination, which was probably due to attrition of the stainless steel stirrer in the HR.

  19. Jupiter's Main Ring

    NASA Technical Reports Server (NTRS)

    1997-01-01

    A mosaic of four images taken through the clear filter (610 nanometers) of the solid state imaging (CCD) system aboard NASA's Galileo spacecraft on November 8, 1996, at a resolution of approximately 46 kilometers (km) per picture element (pixel) along the rings; however, because the spacecraft was only about 0.5 degrees above the ring plane, the image is highly foreshortened in the vertical direction. The images were obtained when Galileo was in Jupiter's shadow peering back toward the Sun; the ring was approximately 2,300,000 kilometers (km) away. The arc on the far right of the image is produced by sunlight scattered by small particles comprising Jupiter's upper atmospheric haze. The ring also efficiently scatters light, indicating that much of its brightness is due to particles that are microns or less in diameter. Such small particles are believed to have human-scale lifetimes, i.e., very brief compared to the solar system's age.

    Jupiter's ring system is composed of three parts -- a flat main ring, a lenticular halo interior to the main ring, and the gossamer ring, which lies exterior to the main ring. The near and far arms of Jupiter's main ring extend horizontally across the mosaic, joining together at the ring's ansa, on the far left side of the figure. The near arm of the ring appears to be abruptly truncated close to the planet, at the point where it passes into Jupiter's shadow. Some radial structure is barely visible across the ring's ansa. A faint mist of particles can be seen above and below the main rings; this vertically extended 'halo' is unusual in planetary rings, and is probably caused by electromagnetic forces pushing the smallest grains out of the ring plane. Because of shadowing, the halo is not visible close to Jupiter in the lower right part of the mosaic.

    Jupiter's main ring is a thin strand of material encircling the planet. The diffuse innermost boundary begins at approximately 123,000 km. The main ring's outer radius is found to be at 128,940 +/-50 km, slightly less than the Voyager value of 129,130 +/-100 km, but very close to the orbit of the satellite Adrastea (128,980 km). The main ring exhibits a marked drop in brightness at 127,849 +/-50 km, lying almost atop the orbit of the Jovian moon Metis at 127,978 km. Satellites seem to affect the structure of even tenuous rings like that found at Jupiter.

    The Jet Propulsion Laboratory, Pasadena, CA manages the mission for NASA's Office of Space Science, Washington, DC.

    This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at: http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at: http:/ /www.jpl.nasa.gov/galileo/sepo.

  20. Study of the impacts of regulations affecting the acceptance of Integrated Community Energy Systems: public utility, energy facility siting and municipal franchising regulatory programs in Maine. Preliminary background report

    SciTech Connect

    Feurer, D A; Weaver, C L; Gallagher, K C; Hejna, D; Rielley, K J

    1980-01-01

    The Maine Supreme Court holds that the regulation of the operations of public utilities is an exercise of the police powers of the state. The legislature has delegated such regulatory authority to the Maine Public Utilities Commission (PUC). The statutes provide no role for local government in the regulation of public utilities. The PUC consists of three full time members, appointed by the Governor subject to review by the Joint Standing Committee on Public Utilities and to confirmation by the Legislature. They each serve seven year terms. One member is designated by the Governor as chairman. The Commission appoints a secretary, assistant secretary, director of transportation, and, with the approval of the Attorney General, a general counsel. A member of the PUC cannot have any official or professional connection or relation with or hold any stock or securities in any public utility. Public utility regulatory statutes, energy facility siting programs, and municipal franchising authority are examined to identify how they may impact on the ability of an organization, whether or not it be a regulated utility, to construct and operate an ICES.

  1. Preliminaries Main Theorem

    E-print Network

    Nevins, Monica

    Preliminaries Main Theorem W-Graphs and their -Invariants Proof of the Main Theorem Type;Preliminaries Main Theorem W-Graphs and their -Invariants Proof of the Main Theorem Type An The other classical Jackson Todor MilevTau Signatures and Characters of Weyl Groups #12;Preliminaries Main Theorem W

  2. The EMMA Main Ring Lattice.

    SciTech Connect

    Berg,J.S.

    2008-02-21

    I give a brief introduction to the purpose and goals of the EMMA experiment and describe how they will impact the design of the main EMMA ring. I then describe the mathematical model that is used to describe the EMMA lattice. Finally, I show how the different lattice configurations were obtained and list their parameters.

  3. Factors affecting the machinability of GFR\\/epoxy composites

    Microsoft Academic Search

    I. El-Sonbaty; U. A. Khashaba; T. Machaly

    2004-01-01

    Drilling is an essential operation in the assembly of the structural frames of automobiles and aircrafts. The life of the joint can be critically affected by the quality of the drilled holes. The main objective of the present paper is to investigate the influence of some parameters on the thrust force, torque and surface roughness in drilling processes of fiber-reinforced

  4. Introduction Main Result

    E-print Network

    Yan, Catherine Huafei

    Introduction Main Result Enumeration Crossings and Nestings of Two Edges in Set Partitions Yan Crossings and Nestings of Set Partitions #12;Introduction Main Result Enumeration Definition} Catherine Yan Crossings and Nestings of Set Partitions #12;Introduction Main Result Enumeration Definition

  5. Processing parameters affecting sorghum noodle qualities 

    E-print Network

    Kunetz, Christine Frances

    1997-01-01

    Processing variables of 100% sorghum noodles were investigated to determine effects on noodle quality. A dough was created by microwave heating a flour with 1 % salt (1 00 g): water (90 ml) mixture to 950C with a microwave. The dough was put through...

  6. Definitions Main Result

    E-print Network

    Heubach, Silvia

    Background Definitions Main Result Special Types of Patterns Summary Avoidance of partially ordered Avoidance of partially ordered patterns in compositions #12;Background Definitions Main Result Special Types of Patterns Summary Outline 1 Background 2 Definitions 3 Main Result Preliminaries Main Result 4 Special Types

  7. FACILITIES MAINTENANCE MAIN WAREHOUSE

    E-print Network

    Hemmers, Oliver

    FACILITIES MAINTENANCE MAIN WAREHOUSE Workload Measurement, Validation, and Process Analysis, and process analysis/improvement study be conducted in the Facilities Maintenance Main Warehouse. This study was conducted from 15 February ­ 30 April 2007. Mr. Storlie is the process owner for the main warehouse. 2

  8. Introduction Climate change is likely to affect the main

    E-print Network

    Vries, Hans de

    is to quantify future coastal change at mid-latitudes under global warming, with an emphasis on dune erosion. We are interested in the slow steady effect of sea level rise relative to the damaging coastal impact that changes Storms and Coastal evolution under AccelerATEd sea level rise Methodology Our work is based on a model

  9. Childhood Injuries in Maine: A Status Report.

    ERIC Educational Resources Information Center

    DiCara, Cheryl; And Others

    Purposes of this report are to: (1) describe the extent of the childhood injury problem relative to diseases and other conditions affecting children in Maine who are 1 to 19 years of age; (2) give an overview of what is known about the incidence of childhood injuries in Maine; and (3) offer recommendations to improve the state's ability to control…

  10. Thymidylate synthase level as the main predictive parameter for sensitivity to 5-fluorouracil, but not for folate-based thymidylate synthase inhibitors, in 13 nonselected colon cancer cell lines.

    PubMed

    van Triest, B; Pinedo, H M; van Hensbergen, Y; Smid, K; Telleman, F; Schoenmakers, P S; van der Wilt, C L; van Laar, J A; Noordhuis, P; Jansen, G; Peters, G J

    1999-03-01

    Thymidylate synthase (TS), a critical enzyme in the de novo synthesis of thymidylate, is an important target for fluoropyrimidines and folate-based TS inhibitors. In a panel of 13 nonselected human colon cancer cell lines, we evaluated the role of TS levels in sensitivity to 5-fluorouracil (5FU) and four folate-based TS inhibitors that have been introduced recently into the clinic: ZD1694 (Tomudex, Raltitrexed, TDX), GW1843U89 (GW), LY231514 (LY), and AG337 (Thymitaq, AG). Because the latter compounds have different transport and polyglutamylation characteristics, we also related these parameters with drug sensitivity, measured by the sulforhodamine B assay after 72 h of drug exposure. For 5FU, the IC50s varied from 0.8 to 43.0 microM. Leucovorin (LV) potentiated the activity of 5FU in only 4 of 13 cell lines. Sensitivity to folate-based TS inhibitors was variable; IC50s were in the range of: 5.3-59.0 nM TDX; 11.0-1570 nM LY; and 0.5-8.9 nM GW. Eleven of 13 cell lines had an IC50 for AG between 1.3 and 5.3 microM. Two cell lines were resistant to AG, Colo201 and SW1116, with IC50s of 27 and 29 microM, respectively. TS catalytic activity (conversion of dUMP to dTMP) varied from 62 to 777 pmol/h/10(6) cells. The number of FdUMP binding sites varied from 32 to 231 fmol/10(6) cells. Regression analysis showed a significant relation between TS catalytic activity and IC50s for 5FU and 5FU/LV. Kis for FdUMP showed a significant Spearman rank correlation with the IC50s of AG and GW. The role of antifolate transport, accumulation, and polyglutamylation was determined with [3H]methotrexate (MTX) as a reference compound. [3H]MTX influx via the reduced folate carrier varied from 18.6 to 150 fmol/10(6) cells/min. Folylpolyglutamate synthetase (FPGS) activity showed a range from 47 to 429 pmol/10(6) cells/h. A total of 24 h of [3H]MTX accumulation showed a 20-fold variation, from 1.2 to 21.8 pmol/10(6) cells. FPGS levels showed a Spearman rank positive correlation with cytotoxicity to TDX. In conclusion, in a heterogeneous nonselected human colon cancer cell line panel, the best predictor for sensitivity to 5FU and 5FU/LV was TS activity. Multiple sensitivity determinants were of importance for antifolate TS inhibitors, including FPGS activity and TS enzyme kinetics. PMID:10100718

  11. Collins' bypass for the main ring

    SciTech Connect

    Ohnuma, S.

    1982-08-10

    Design of the bypass for the main ring at Fermilab is discussed. Specific design features discussed include space, path length, geometric closure, matching of betatron functions, and external dispersion. Bypass parameters are given. (GHT)

  12. The Maine Event

    ERIC Educational Resources Information Center

    McHale, Tom

    2007-01-01

    In this article, the author describes the successful laptop program employed at Mt. Abram High School in Strong, Maine. Through the Maine Learning Technology Initiative, the school has issued laptops to all 36,000 teachers and students in grades 7-8. This program has helped level the playing field for a student population that is 50 percent to 55…

  13. MAINE MARINE WORM HABITAT

    EPA Science Inventory

    WORM provides a generalized representation at 1:24,000 scale of commercially harvested marine worm habitat in Maine, based on Maine Department of Marine Resources data from 1970's. Original maps were created by MDMR and published by USF&WS as part of the ""&quo...

  14. Teaching Main Idea Comprehension.

    ERIC Educational Resources Information Center

    Baumann, James F., Ed.

    Intended to help classroom teachers, curriculum developers, and researchers, this book provides current information on theoretical and instructional aspects of main idea comprehension. Titles and authors are as follows: "The Confused World of Main Idea" (James W. Cunningham and David W. Moore); "The Comprehension of Important Information in…

  15. Main results An application

    E-print Network

    Borne, Niels

    diagram: (X, x) // PX spec k (x,x) // X Ã?k X Niels Borne, Angelo Vistoli The Nori fundamental gerbe #12Motivation Main results An application Beyond the profinite fundamental gerbe The Nori fundamental on the fundamental group scheme, 5.5.2014 Niels Borne, Angelo Vistoli The Nori fundamental gerbe #12;Motivation Main

  16. Gulf of Maine: Weather

    NSDL National Science Digital Library

    Lessons and activities from the Gulf of Maine Research Institute (formerly Gulf of Maine Aquarium), focused on hurricanes, El Nino, fog, and volcanic eruptions. Emphasis on important hurricanes of the past. Resources include lessons, guides for simple experiments, and a student weather network. Downloadable materials and additional webpages also provided.

  17. Elements affecting runway traction

    NASA Technical Reports Server (NTRS)

    Horne, W. B.

    1974-01-01

    The five basic elements affecting runway traction for jet transport aircraft operation are identified and described in terms of pilot, aircraft system, atmospheric, tire, and pavement performance factors or parameters. Where possible, research results are summarized, and means for restoring or improving runway traction for these different conditions are discussed.

  18. NA57 main results

    E-print Network

    G. E. Bruno; for the NA57 Collaboration

    2007-10-15

    The CERN NA57 experiment was designed to study the production of strange and multi-strange particles in heavy ion collisions at SPS energies; its physics programme is essentially completed. A review of the main results is presented.

  19. MAINE WEIRS 1990

    EPA Science Inventory

    WEIR90 shows point locations of herring weirs in Maine based on 1990 overflight by MDMR Marine Patrol, mapped at an approximate scale of 1:100,000. Data were screen digitized from paper maps used during the overflight....

  20. Landmark Main Idea

    NSDL National Science Digital Library

    Amanda Shipley

    2012-07-23

    In this lesson, students will use key details to determine the main idea of informational text about landmarks. For the summative assessment, students will work in small groups to read an informational text about landmarks, fill out a Main Idea Pyramid Graphic Organizer, and then create a poster in the shape of the landmark they read about. Students will utilize the information on their graphic organizer when creating their poster.

  1. Space Shuttle Main Engine. Overview

    NASA Astrophysics Data System (ADS)

    Jackson, Eugene D.

    An overview of the Space Shuttle Main Engine (SSME) is presented. The Space Shuttle propulsion system consists of two large solid booster motors, three SSME's, two orbital maneuvering system engines, and 44 reaction control system thrusters. The three SSME's burn liquid hydrogen and liquid oxygen from the external tank and are sequentially started at launch. Engine thrust is throttleable. The major components and some of their key features and operational parameters are outlined. The life and reliability being achieved by the SSME are presented.

  2. Main sequence mass loss

    SciTech Connect

    Brunish, W.M.; Guzik, J.A.; Willson, L.A.; Bowen, G.

    1987-01-01

    It has been hypothesized that variable stars may experience mass loss, driven, at least in part, by oscillations. The class of stars we are discussing here are the delta Scuti variables. These are variable stars with masses between about 1.2 and 2.25 M/sub theta/, lying on or very near the main sequence. According to this theory, high rotation rates enhance the rate of mass loss, so main sequence stars born in this mass range would have a range of mass loss rates, depending on their initial rotation velocity and the amplitude of the oscillations. The stars would evolve rapidly down the main sequence until (at about 1.25 M/sub theta/) a surface convection zone began to form. The presence of this convective region would slow the rotation, perhaps allowing magnetic braking to occur, and thus sharply reduce the mass loss rate. 7 refs.

  3. Main GV Input Panel Main GV input screen. All of the GV input parameters are

    E-print Network

    Throop, Henry

    the Pluto-Charon system from the viewpoint of the inbound New Horizons spacecraft. Over the course of 1 is the primary planning tool used by the New Horizons science team to plan the encounter with Pluto. GV creates Kodak Moment' observations of the Pluto system from New Horizons. Time Sequences This plot shows

  4. Main features of meiosis

    SciTech Connect

    NONE

    1993-12-31

    Chapter 17, outlines the main features of meiosis, beginning with its significance and proceeding through the meiotic stages. Meiosis is the most important modification of mitosis because it is the reduction division that gives rise to the haploid generation in the life cycle. 17 refs., 6 figs.

  5. Maine Humanities Council

    NSDL National Science Digital Library

    Formed as a private nonprofit organization, the Maine Humanities Council (MHC) "promotes strong communities and informed citizens by providing Mainers with opportunities to explore the power and pleasure of ideas." Their work is supported by volunteer board members, and their projects include programs to promote reading and writing, guest lectures around the state, and online newsletters and discussion groups. In the "Programs" area, visitors can learn about these programs, and educators can check out the resources created especially for them. The "Connections" area contains links to their thoughtful blog, their "Humanities on Demand" podcasts, and their periodic newsletter "Synapse", which deals with medicine and literature. The podcasts are quite fun, and they include "Franco-American Women's Words in Maine" and a talk by Professor Dianne Sadoff of Rutgers University on Middlemarch, by George Eliot.

  6. Windows on Maine

    NSDL National Science Digital Library

    Created with funds provided by the Institute of Museum and Library Services (IMLS), Windows on Maine contains interesting and informative programs and video clips from Maine Public Broadcasting and other partners. On their homepage, visitors can use their interactive map and timeline to locate video clips of interest, and they can also search the entire collection for specific items. Visitors can also use the subject category menu to look over 25 different headings, including "earth sciences", "land disputes", and "Penobscot tribe". The map feature is a real pip, and visitors can customize their search by location and date, and it's a great way to learn about different regions, including Aroostook County (also known as "the County") and Downeast. Also, many of the videos also have additional resources attached to them, such as railroad timetables, historic photographs, and so on.

  7. Main roads to melanoma

    PubMed Central

    Palmieri, Giuseppe; Capone, Mariaelena; Ascierto, Maria Libera; Gentilcore, Giusy; Stroncek, David F; Casula, Milena; Sini, Maria Cristina; Palla, Marco; Mozzillo, Nicola; Ascierto, Paolo A

    2009-01-01

    The characterization of the molecular mechanisms involved in development and progression of melanoma could be helpful to identify the molecular profiles underlying aggressiveness, clinical behavior, and response to therapy as well as to better classify the subsets of melanoma patients with different prognosis and/or clinical outcome. Actually, some aspects regarding the main molecular changes responsible for the onset as well as the progression of melanoma toward a more aggressive phenotype have been described. Genes and molecules which control either cell proliferation, apoptosis, or cell senescence have been implicated. Here we provided an overview of the main molecular changes underlying the pathogenesis of melanoma. All evidence clearly indicates the existence of a complex molecular machinery that provides checks and balances in normal melanocytes. Progression from normal melanocytes to malignant metastatic cells in melanoma patients is the result of a combination of down- or up-regulation of various effectors acting on different molecular pathways. PMID:19828018

  8. Main-group pallasites

    Microsoft Academic Search

    John T. Wasson; Byeon-Gak Choi

    2003-01-01

    We used neutron activation to characterize the metal of 33 main-group pallasites (PMG), widely held to be samples of a core–mantle interface. Most PMG cluster in a narrow range of metal and silicate compositions, but 6 are assigned to an anomalous subset (PMG-am) because of their deviant metal compositions, and 4 others to another anomalous subset (PMG-as) because of their

  9. Main graphs: Quadratic equation

    E-print Network

    Utrecht, Universiteit

    Main graphs: Quadratic equation: Equation A2 +B+C = 0, has solutions given by the following 'abc equations: Equation dN dt = kN has the solution: N(t) = N0ekt; N0 is an (arbitrary) initial value of N. Characteristic time of change is = 1/k. Systems of linear differential equations: For system dx dt = ax+by dy dt

  10. Is there an efficient trap or collection method for sampling Anopheles darlingi and other malaria vectors that can describe the essential parameters affecting transmission dynamics as effectively as human landing catches? - A Review.

    PubMed

    Lima, José Bento Pereira; Rosa-Freitas, Maria Goreti; Rodovalho, Cynara Melo; Santos, Fátima; Lourenço-de-Oliveira, Ricardo

    2014-08-01

    Distribution, abundance, feeding behaviour, host preference, parity status and human-biting and infection rates are among the medical entomological parameters evaluated when determining the vector capacity of mosquito species. To evaluate these parameters, mosquitoes must be collected using an appropriate method. Malaria is primarily transmitted by anthropophilic and synanthropic anophelines. Thus, collection methods must result in the identification of the anthropophilic species and efficiently evaluate the parameters involved in malaria transmission dynamics. Consequently, human landing catches would be the most appropriate method if not for their inherent risk. The choice of alternative anopheline collection methods, such as traps, must consider their effectiveness in reproducing the efficiency of human attraction. Collection methods lure mosquitoes by using a mixture of olfactory, visual and thermal cues. Here, we reviewed, classified and compared the efficiency of anopheline collection methods, with an emphasis on Neotropical anthropophilic species, especially Anopheles darlingi, in distinct malaria epidemiological conditions in Brazil. PMID:25185008

  11. Agricultural Water Demand Along the Colorado River Main Stem

    E-print Network

    Fay, Noah

    Agricultural Water Demand Along the Colorado River Main Stem: An Econometric Analysis Advisor: Dr River Main Stem accounts for more than 40% of Arizona's total Colorado River allocation (This River Main Stem #12;Factors Affecting Agricultural Demand for Water Acreage Decisions · Which crops

  12. DaimaruDaimaru Agriculture Main GateMain Gate

    E-print Network

    Tachizawa, Kazuya

    JR Sapporo Sta. JR Sapporo Sta. DaimaruDaimaru Agriculture Main GateMain Gate Kita13-jo Gate 12-jo Sta. Kita 18-jo Sta. International Student Center MainCampusStreet PoplarAvenue Ginkgo AvenueGinkgo Avenue Ono Pond Ono Pond Bust of Dr. Clark The main Bldg. of facutly of Science (The Hokkaido Univ

  13. March 29, 2008 Operating Systems: Main Memory 1 Main Memory

    E-print Network

    Adam, Salah

    March 29, 2008 Operating Systems: Main Memory 1 Main Memory Chapter 8 #12;March 29, 2008 Operating Systems: Main Memory 2 Chapter Outline Background Contiguous Memory Allocation Paging Structure of the Page Table Segmentation #12;March 29, 2008 Operating Systems: Main Memory 3 Objectives To provide

  14. Dravet syndrome: the main issues.

    PubMed

    Guerrini, Renzo

    2012-09-01

    Dravet syndrome (DS) is a severe form of infantile onset epilepsy characterized by multiple seizure types, prolonged convulsive seizures and frequent episodes of status epilepticus. Seizures precipitated by fever are a main characteristic. Affected children exhibit normal early development. Cognitive impairment, behavioral disturbances with hyperactivity and sometimes autistic traits occur after seizure onset. Seizures persist into adulthood but become less frequent. In about 85% of patients, a mutation of the SCN1A gene is present. DS fully illustrates the concept of epileptic encephalopathy. However, it is difficult to determine the causative role of the underlying sodium channel dysfunction and that of the consequent seizures in influencing cognitive outcome. An overwhelmingly high number of SCN1A mutations have been associated with DS. Intragenic or whole gene deletions, duplications and amplifications are additional rare molecular mechanisms. Most mutations are de novo, but familial mutations also occur. Somatic mosaic mutations should be considered when estimating the recurrence. MRI imaging is usually normal, and no neuropathologic signature of the condition seems to exist. In heterozygous Scn1a+/- mice, GABAergic interneurons exhibit substantially reduced sodium current density with reduced ability for sustained action potential firing. GABAergic output is reduced and excitability of downstream synaptic targets increased. Stiripentol was effective in combination with valproate and clobazam in two pivotal phase III trials. Phenytoin, carbamazepine, and lamotrigine can worsen seizures and should be avoided. Prospective studies will clarify to what extent earlier diagnosis and efforts at seizure control with the most appropriate drug combinations will reduce clinical deterioration. PMID:22705271

  15. Drugs Modifying Nitric Oxide Metabolism Affect Plasma Cholesterol Levels, Coagulation Parameters, Blood Pressure Values and the Appearance of Plasma Myocardial Necrosis Markers in Rabbits: Opposite Effects of L-NAME and Nitroglycerine

    Microsoft Academic Search

    Arnaldo Pinelli; Silvio Trivulzio; Livio Tomasoni; Boris Bertolini; Sergio Brenna; Edgardo Bonacina; Roberto Accinni

    2003-01-01

    Various experiments have shown that decreased nitric oxide values alter plasma lipid levels or coagulation parameters or blood pressure values or cause myocardial necrosis phenomena, but it is not clear whether these alterations are reciprocally connected, or whether nitric oxide changes are involved in the appearance of some coronary disease risk factors (lipid, coagulation, blood pressure alterations) and myocardial necrosis.

  16. University of Maine Cooperative Extension

    E-print Network

    Leistikow, Bruce N.

    University of Maine Cooperative Extension Hand Signals Useful for Farmers Bulletin #2335 by Dawna L of Congress of May 8 and June 30, 1914, by the University of Maine Cooperative Extension, Vaughn H. Holyoke, Director for the University of Maine Cooperative Extension, the Land Grant University of the state of Maine

  17. Main Campus CO Cowell Hall

    E-print Network

    Galles, David

    Main Campus CO Cowell Hall CSI John Lo Schiavo, S.J Center for Science and Innovation FR Fromm Hall Main Bldg/Classrooms/Study Hall LMN Lone Mountain North LMP Pacific Wing LMR Rossi Wing Academic and Enrollment Services Lone Mountain Main Admission Office Lone Mountain Main Alumni Office Lone

  18. Sensitivity analysis of an Ocean Carbon Cycle Model in the North Atlantic: an investigation of parameters affecting the air-sea CO2 flux, primary production and export of detritus

    Microsoft Academic Search

    V. Scott; H. Kettle; C. J. Merchant

    2010-01-01

    The sensitivity of the biological parameters in a nutrient-phytoplankton-zooplankton-detritus (NPZD) model in the calculation of the air-sea CO2 flux, primary production and detrital export is analysed. The NPZD model is the Hadley Centre Ocean Carbon Cycle model (HadOCC) from the UK Met Office, used in the Hadley Centre Coupled Model 3 (HadCM3) and FAst Met Office and Universities Simulator (FAMOUS)

  19. 6. MAIN AND SOUTH BAYS. DETAIL OF TOP OF MAIN ...

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

    6. MAIN AND SOUTH BAYS. DETAIL OF TOP OF MAIN BAY COLUMN, GIRDER FOR ELECTRIC OVERHEAD TRAVEL CRANE, AND ROOF GIRDERS - Oldman Boiler Works, Fabricating Shop, 32 Illinois Street, Buffalo, Erie County, NY

  20. University of Maine at Farmington University of Southern Maine

    E-print Network

    New Hampshire, University of

    University of Maine at Farmington University of Southern Maine Plymouth State University University of New Hampshire University of Massachusetts at Boston University of Massachusetts at Amherst Worcester State University Massachusetts College of Liberal Arts Bridgewater State University Westfield State

  1. 22. View showing main anchor arm, as viewed from main ...

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

    22. View showing main anchor arm, as viewed from main cantilever arm looking south. Note upper chord eyebar arrangement. - Williamstown-Marietta Bridge, Spanning Ohio River between Williamstown & Marietta, Williamstown, Wood County, WV

  2. 37. Fore and main masts, and main boom lying in ...

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

    37. Fore and main masts, and main boom lying in storage yard. Stern of Museum Ship Wavetreet to left in photograph. - Schooner "Lettie G. Howard", South Street Seaport Museum, New York, New York County, NY

  3. Optics Simulations for the NLC Main Linac

    SciTech Connect

    Woodley, Mark D

    2001-06-15

    Focusing in the NLC main linac will be provided mainly by hybrid permanent magnet quadrupoles which have limited variability in strength. When the energy profile of the linac changes, due to normal cycling of rf sources, mismatches in the beam optics can be generated if the quadrupole strengths are not rescaled to the new energy profile. These mismatches can lead to emittance dilution. In addition, betatron phase advance changes caused by the mismatch can adversely affect the beam trajectory, leading to emittance dilution from dispersion and wakefields. This paper describes the results of simulations of these processes, undertaken in an attempt to determine whether or not rescaling of the quadrupoles will be necessary in the NLC main linac.

  4. From Guindy IIT MADRAS MAIN

    E-print Network

    Kumar, M. Jagadesh

    From Guindy IIT MADRAS MAIN ENTRANCE From Adyar MADHYA KAILASH SIGNAL MADHYA KAILASH TEMPLE From Technology and Business Incubator From Guindy IIT MADRAS MAIN ENTRANCE From Adyar MADHYA KAILASH SIGNAL

  5. Biogeography of Nearshore Subtidal Invertebrates in the Gulf of Maine

    EPA Science Inventory

    The biogeography of nearshore benthic invertebrates in the Gulf of Maine was studied to compare recent data with historical biogeographic studies, define physical-chemical factors affecting species distributions, and provide information needed to calibrate benthic indices of envi...

  6. MAIN CHAMBER NEUTRAL PRESSURE IN

    E-print Network

    Pitcher, C. S.

    MAIN CHAMBER NEUTRAL PRESSURE IN ALCATOR C-MOD AND JET C S Pitcher, S K Erents*, W Fundamenski*, B on Controlled Fusion and Plasma Physics 18 ­ 22 June 1999, Madeira, Portugal MAIN CHAMBER NEUTRAL PRESSURE Science Centre, Abingdon, Oxon OX14 3DB,UK #12;(1) Introduction · main chamber gas can have a number

  7. UC Santa Cruz Main Entrance

    E-print Network

    Wilmers, Chris

    UC Santa Cruz West Entrance Em pire Grade Main Entrance HagarDrive Coolid geDrive P PLAZA WEST. At the Main Entrance, proceed west on Empire Grade, then turn right on Heller (the West Entrance). Turn right-day visitor permits may be purchased at the main entrance kiosk or at the TAPS Sales Office (located in the H

  8. MAINE MUSSEL SEED CONSERVATION AREAS

    EPA Science Inventory

    SEED shows point locations of Maine mussel seed conservation areas at 1:24,000 scale. Data for this coverage were screen digitized on a 1:24000 scale base using descriptions contained in Maine Department of Marine Resources (MDMR) rules. Coastal arcs from Maine Office of GIS 1:24...

  9. 2014 Maine Earth Science Day

    USGS Multimedia Gallery

    On October 15, 2014 Maine Earth Science Day was held at the Maine State Museum in Augusta. The USGS was represented by Charlie Culbertson, left, and Nick Waldron, right. This photo was taken as the two were packing up for the day, and shows a main feature of the table, a touch screen display with th...

  10. Pre-Workout Carbohydrate Supplementation does not Affect Measures of Selfassessed Vitality and Affect in College Swimmers

    PubMed Central

    Hill, Kathleen M.; Whitehead, James R.; Goodwin, Janice K.

    2011-01-01

    Beneficial effects of dietary carbohydrate (CHO) on physical and psychological parameters have been demonstrated in athletes. Because affect, or mood, can predict athletic performace, the main objective of this study was to determine the effect of pre-workout CHO on affect in swimmers. College swimmers (n = 37) participated in a randomized crossover experiment of the effects of a pre-workout CHO supplement on vitality and affect. Subjects consumed a CHO supplement or placebo for two days before morning practice. After each morning practice, swimmers completed measures of affect and feelings of vitality. Pearson correlations were performed to describe relationships among variables. Differences in means between the CHO and placebo conditions were determined by paired t-tests. Independent t-tests were used to determine differences in variables between the highest and lowest tertiles of breakfast consumption frequency. All statistical analyses were performed using SAS 9.1.3 (Cary, NC) and statistical signficance was set at ? = 0.05. There were no significant differences in affect or feelings of vitality between the CHO supplement and placebo conditions (all p ? 0.15). Our results do not support a beneficial effect of CHO supplementation before morning swim practice on affect or feelings of vitality in swimmers. Key points Pre-workout carbohydrate did not affect post-workout measures of vitality or affect in collegiate swimmers. Avoidance of feeling nauseous/ill’ and ‘lack of time’ were the most frequent reasons reported by swimmers for forgoing breakfast before morning swim practice. A longer trial of carbohydrate supplementation is needed to verify if there is indeed no effect of pre-workout carbohydrate on post-workout measures of vitality or affect in swimmers. PMID:24150621

  11. Cosmological Parameters

    E-print Network

    Charles H. Lineweaver

    2001-12-17

    This article briefly summarizes the increasingly precise observational estimates of the cosmological parameters. After three years on the stump, the Lambda-CDM model is still the leading candidate. Although the Universe is expanding, our picture of it is coming together.

  12. Implementation of Affect Sensitive News Agent (ASNA) for Affectively Classifying of News Summary

    Microsoft Academic Search

    Shaikh Mostafa Al Masum; Tawhidul Islam; Mitsuru Ishizuka; Helmut Prendinger

    In this paper, we explain a system entitled Affect Sensi- tive News Agent (ASNA) developed as a news aggrega- tor that fetches news employing several RSS news-feeds and auto-categorizes the news according to affect sensi- tivity. There are three main factors that distinguish our work from other similar ones. First, we have integrated the approach to sense affective information from

  13. EXPLORATORY FISHING FOR MAINE HERRING

    E-print Network

    463 EXPLORATORY FISHING FOR MAINE HERRING by Keith A. Smith Marine Biolcgica! Labcratory Ul a R AR. McKernan, Director EXPLORATORY FISHING FOR MAINE HERRING by Keith A. Smith International Inshore explorations 1 Herring winter habitat 6 Coastal gill net fishing 8 Summary 9 lii #12

  14. Main Propulsion Test Article (MPTA)

    NASA Technical Reports Server (NTRS)

    Snoddy, Cynthia

    2010-01-01

    Scope: The Main Propulsion Test Article integrated the main propulsion subsystem with the clustered Space Shuttle Main Engines, the External Tank and associated GSE. The test program consisted of cryogenic tanking tests and short- and long duration static firings including gimbaling and throttling. The test program was conducted on the S1-C test stand (Position B-2) at the National Space Technology Laboratories (NSTL)/Stennis Space Center. 3 tanking tests and 20 hot fire tests conducted between December 21 1 1977 and December 17, 1980 Configuration: The main propulsion test article consisted of the three space shuttle main engines, flightweight external tank, flightweight aft fuselage, interface section and a boilerplate mid/fwd fuselage truss structure.

  15. EXHAUST MAIN PERSONNEL EXPOSURE CALCULATION

    SciTech Connect

    S. Su

    1999-09-29

    The purpose of this activity is to identify and determine potential radiation hazards in the service exhaust main due to a waste package leakage from an emplacement drift. This work supports the subsurface ventilation system design for the EDA II, which consists of an accessible service exhaust main for personnel, and an exhaust main for hot air flow. The objective is to provide the necessary radiation exposure calculations to determine if the service exhaust main is accessible following a waste package leak. This work includes the following items responsive to the stated purpose and objective: Calculate the limiting transient radiation exposure of personnel in the service exhaust main due to the passage of airborne radioactive material through the ventilation raise and connecting horizontal raise to the exhaust main in the event of a leaking waste package Calculate the potential exposures to maintenance workers in the service exhaust main from residual radioactive material deposited inside of the ventilation raise and connecting horizontal raise This calculation is limited to external radiation only, since the airborne and contamination sources will be contained in the ventilation raise and connecting horizontal raise.

  16. Effect of Geometric Parameters on the Performance of P-Type Junctionless Lateral Gate Transistors

    PubMed Central

    Larki, Farhad; Dehzangi, Arash; Md Ali, Sawal Hamid; Jalar, Azman; Islam, Md. Shabiul; Hamidon, Mohd Nizar; Majlis, Burhanuddin Yeop

    2014-01-01

    This paper examines the impact of two important geometrical parameters, namely the thickness and source/drain extensions on the performance of low doped p-type double lateral gate junctionless transistors (DGJLTs). The three dimensional Technology Computer-Aided Design simulation is implemented to calculate the characteristics of the devices with different thickness and source/drain extension and based on that, the parameters such as threshold voltage, transconductance and resistance in saturation region are analyzed. In addition, simulation results provide a physical explanation for the variation of device characteristics given by the variation of geometric parameters, mainly based on investigation of the electric field components and the carries density variation. It is shown that, the variation of the carrier density is the main factor which affects the characteristics of the device when the device's thickness is varied. However, the electric field is mainly responsible for variation of the characteristics when the source/drain extension is changed. PMID:24743692

  17. Effect of geometric parameters on the performance of p-type junctionless lateral gate transistors.

    PubMed

    Larki, Farhad; Dehzangi, Arash; Md Ali, Sawal Hamid; Jalar, Azman; Islam, Md Shabiul; Hamidon, Mohd Nizar; Majlis, Burhanuddin Yeop

    2014-01-01

    This paper examines the impact of two important geometrical parameters, namely the thickness and source/drain extensions on the performance of low doped p-type double lateral gate junctionless transistors (DGJLTs). The three dimensional Technology Computer-Aided Design simulation is implemented to calculate the characteristics of the devices with different thickness and source/drain extension and based on that, the parameters such as threshold voltage, transconductance and resistance in saturation region are analyzed. In addition, simulation results provide a physical explanation for the variation of device characteristics given by the variation of geometric parameters, mainly based on investigation of the electric field components and the carries density variation. It is shown that, the variation of the carrier density is the main factor which affects the characteristics of the device when the device's thickness is varied. However, the electric field is mainly responsible for variation of the characteristics when the source/drain extension is changed. PMID:24743692

  18. Use of Strontium Isotopes to Identify Buried Water Main Leakage

    E-print Network

    Jiao, Jiu Jimmy

    is proposed for seepage source identification. Introduction Losses of water in buried distribution networksUse of Strontium Isotopes to Identify Buried Water Main Leakage Into Groundwater in a Highly water mains. The identification of leakage locations was done by conventional water quality parameters

  19. Virtual Tour of Maine Geology

    NSDL National Science Digital Library

    This selection of slide shows provides a photographic tour of Maine geology. Users can choose slide shows on surficial, bedrock, and coastal geology; fossils, geologic hazards, groundwater and wells; or mineral collecting, mining, and quarrying.

  20. Humboldt River main stem, Nevada

    USGS Publications Warehouse

    Warmath, Eric; Medina, Rose L.

    2001-01-01

    This data set contains the main stem of the Humboldt River as defined by Humboldt Project personnel of the U.S. Geological Survey Nevada District, 2001. The data set was digitized on screen using digital orthophoto quadrangles from 1994.

  1. Main Sequence Evolution with Layered Semiconvection

    E-print Network

    Moore, Kevin

    2015-01-01

    Semiconvection - mixing that occurs in regions that are stable when considering compositional gradients, but unstable when ignoring them - is shown to have the greatest potential impact on main sequence stars with masses in the range 1.2 - 1.7 solar masses. We present the first stellar evolution calculations using a prescription for semiconvection derived from extrapolation of direct numerical simulations of double-diffusive mixing down to stellar parameters. The dominant mode of semiconvection in stars is layered semiconvection, where the layer height is an adjustable parameter analogous to the mixing length in convection. The rate of mixing across the semiconvective region is sensitively dependent on the layer height. We find that there is a critical layer height that separates weak semiconvective mixing (where evolution is well-approximated by using the Ledoux criterion) from strong semiconvective mixing (where evolution is well-approximated by using the Schwarzschild criterion). This critical layer height...

  2. Parameters affecting the formation of perfluoroalkyl acids during wastewater treatment.

    PubMed

    Guerra, P; Kim, M; Kinsman, L; Ng, T; Alaee, M; Smyth, S A

    2014-05-15

    This study examined the fate and behaviour of perfluoroalkyl acids (PFAAs) in liquid and solid samples from five different wastewater treatment types: facultative and aerated lagoons, chemically assisted primary treatment, secondary aerobic biological treatment, and advanced biological nutrient removal treatment. To the best of our knowledge, this is the largest data set from a single study available in the literature to date for PFAAs monitoring study in wastewater treatment. Perfluorooctanoic acid (PFOA) was the predominant PFAA in wastewater with levels from 2.2 to 150ng/L (influent) and 1.9 to 140ng/L (effluent). Perfluorooctanesulfonic acid (PFOS) was the predominant compound in primary sludge, waste biological sludge, and treated biosolids with concentrations from 6.4 to 2900ng/g dry weight (dw), 9.7 to 8200ng/gdw, and 2.1 to 17,000ng/gdw, respectively. PFAAs were formed during wastewater treatment and it was dependant on both process temperature and treatment type; with higher rates of formation in biological wastewater treatment plants (WWTPs) operating at longer hydraulic retention times and higher temperatures. PFAA removal by sorption was influenced by different sorption tendencies; median log values of the solid-liquid distribution coefficient estimated from wastewater biological sludge and final effluent were: PFOS (3.73)>PFDA (3.68)>PFNA (3.25)>PFOA (2.49)>PFHxA (1.93). Mass balances confirmed the formation of PFAAs, low PFAA removal by sorption, and high PFAA levels in effluents. PMID:24691135

  3. Study on basalt fiber parameters affecting fiber-reinforced mortar

    NASA Astrophysics Data System (ADS)

    Orlov, A. A.; Chernykh, T. N.; Sashina, A. V.; Bogusevich, D. V.

    2015-01-01

    This article considers the effect of different dosages and diameters of basalt fibers on tensile strength increase during bending of fiberboard-reinforced mortar samples. The optimal dosages of fiber, providing maximum strength in bending are revealed. The durability of basalt fiber in an environment of cement, by means of microscopic analysis of samples of fibers and fiberboard-reinforced mortar long-term tests is examined. The article also compares the behavior of basalt fiber in the cement stone environment to a glass one and reveals that the basalt fiber is not subject to destruction.

  4. Parameters affecting the remediation of contaminated multiporosity media

    Microsoft Academic Search

    HILLEL RUBIN; DIETMAR JANSEN; CHRISTIAN FORKEL; JURGEN KÔNGETER

    1998-01-01

    This paper concerns the possible remediation of contaminated multi-porosity media such as fractured permeable aquifers comprising macro-fractures, micro-fractures and the host rock. In the multi-porosity medium, the dispersion of contaminants in the various types of fractures is associated with contaminant diffusion in regions of low permeability. These processes are important to the reclamation of the contaminated soil. In the framework

  5. Parameters affecting shock decision in pediatric automated defibrillation

    Microsoft Academic Search

    S Ruiz de Gauna; J. Ruiz; U. Irusta; E. Aramendi

    2008-01-01

    There are important differences between adult and pediatric ECG. To approve their use in children, the adaptation of automated external defibrillator (AED) shock advice algorithms require a specific analysis of the particular pediatric ECG characteristics. In this study, we measured several pediatric ECG features and assessed their potential ability in the distinction between shockable and non-shockable pediatric rhythms. For this

  6. Parameters Affecting Seismic Moment Release Rates Along Plate Boundaries

    Microsoft Academic Search

    C. Frohlich; L. R. Wetzel

    2005-01-01

    We have undertaken a survey of seismic moment release along Earth's major plate boundaries. For each plate boundary, the moment release rate R is the sum of scalar moments divided by the length of the boundary and by the relative plate velocity V; we evaluate R for both the Harvard CMT and a global historical catalog. The survey confirms that

  7. Investigation of the Parameters Affecting the Cetane Number of Biodiesel

    Microsoft Academic Search

    Kapila Wadumesthrige; Jeremiah C. Smith; John R. Wilson; Steven O. Salley; K. Y. Simon Ng

    2008-01-01

    The cetane number is the most significant property for measuring the ignition quality of fuels for compression ignition diesel\\u000a engines. In this study, the derived cetane number (DCN) of several types of biodiesel, biodiesel components and ultra-low\\u000a sulfur diesel (ULSD) was determined using an Ignition Quality Tester (IQT™). The chemical structure of FAME leads to a higher\\u000a cetane number of

  8. PARAMETERS AFFECTING THE LOADING OF HYDROGEN ISOTOPES INTO PALLADIUM CATHODES

    Microsoft Academic Search

    F. L. Tanzella; S. Crouch-Baker; A. McKeown; M. C. H. McKubre; M. Williams; S. Wing

    We have tested our new Degree of Loading (DoL) cell design which can be directly transferred to the SRI mass flow calorimeter. We have shown that appropriately prepared Pd cathodes can reach high loadings in this new design and that the cells can be transferred to the calorimeter without degrading the cathode's or cell's performance. In all of the experiments

  9. ORFEUS-SPAS MAIN TELESCOPE

    NASA Technical Reports Server (NTRS)

    1996-01-01

    In the Multi-Payload Processing Facility (MPPF) at KSC, technicians hoist the orbiting and Retrievable Far and Extreme Ultraviolet Spectrograph-Shuttle Pallet Satellite (ORFEUS-SPAS) II main telescope to a vertical position prior to installing it atop the Astronomy Shuttle Pallet Satellite (ASTRO-SPAS) platform. Two spectrographs share the main telescope: the Extreme Ultraviolet Spectrograph (EUV) provided by the University of California at Berkeley, and the Far Ultraviolet Spectrograph (FUV) designed by German institutions the University of Tubingen and Landessternwarte Heidelberg and built by German company Kayser-Threde. The main telescope has a primary mirror approximately one yard (one meter) in diameter, coated with iridium to improve its light-gathering power in the ultraviolet. During the flight of ORFEUS-SPAS II on Space Shuttle Mission STS- 80, these two spectrographs -- along with a third installed separately on the ASTRO-SPAS -- will gather data about the life cycle of stars.

  10. New Main Ring control system

    SciTech Connect

    Seino, K.; Anderson, L.; Ducar, R.; Franck, A.; Gomilar, J.; Hendricks, B.; Smedinghoff, J.

    1990-03-01

    The Fermilab Main Ring control system has been operational for over sixteen years. Aging and obsolescence of the equipment make the maintenance difficult. Since the advent of the Tevatron, considerable upgrades have been made to the controls of all the Fermilab accelerators except the Main Ring. Modernization of the equipment and standardization of the hardware and software have thus become inevitable. The Tevatron CAMAC serial system has been chosen as a basic foundation in order to make the Main Ring control system compatible with the rest of the accelerator complex. New hardware pieces including intelligent CAMAC modules have been designed to satisfy unique requirements. Fiber optic cable and repeaters have been installed in order to accommodate new channel requirements onto the already saturated communication medium system. 8 refs., 2 figs.

  11. Numerical analysis of the three-dimensional flow in the main injector assembly of the Space Shuttle Main Engine

    NASA Technical Reports Server (NTRS)

    Mukerjee, T.; Przkewas, A. J.; Holland, R. S.; Costes, N. C.

    1986-01-01

    The Main Injector Assembly of the Space Shuttle Main Engine supplies the propellants to the Main Combustion Chamber through a large number of vertical injector elements. The gas flow around these elements (LOX posts) is three-dimensional, turbulent and compressible. This paper presents the results of numerical modeling of the hot and cool sections of the Main Injector Assembly and shows that the shields on the outermost row of injector elements affect the flow and the pressure drop in the hot section significantly. It is suggested that appropriate experiments are undertaken to verify the predictions.

  12. Incorporating Distribution Parameter Uncertainty in Reliability Calculation

    Microsoft Academic Search

    Satchi Venkataraman; William C. Strack; V. Nagpal; S. S. Pai

    2007-01-01

    Probabilistic methods for risk and reliability assessment require knowledge of statistical variation of design parameters. Often the parameters themselves are uncertain. In such cases it is important to understand how parameter uncertainties will affect the reliability measures, probability of failure or reliability index calculations. This article presents the different methods that have been developed to calculate sensitivities of reliability index

  13. Strategic petroleum reserves in Maine

    Microsoft Academic Search

    Tibbetts

    1977-01-01

    An evaluation was made to determine if the State of Maine should develop a State petroleum storage reserve to protect its economic and social vitality against future petroleum shortages. The requirements for residual oil are delineated and alternate storage options are described. The adequacy of the National Strategic Petroleum Reserve Program (S.P.R.) as a tool for alleviating shortfalls of residual

  14. Abolishing Mandatory Retirement in Maine

    ERIC Educational Resources Information Center

    Riley, Patricia A.

    1978-01-01

    The Maine Committee on Aging, a statewide citizen advisory agency, successfully proposed legislation to abolish mandatory retirement in the public sector by July 1, 1978. The legislation also orders that a study containing recommendations for possible mandatory retirement abolition in the private sector be completed by 1979. This article discusses…

  15. Main Campus Raleigh-Durham

    E-print Network

    Velev, Orlin D.

    Centennial Campus Research Dr. Research IV Research III Research II Research I Partners I ABB Building VarsityDr. Main Campus Dr. Venture Complex Partners II Wade Ave. Hillsborough St. GormanSt. FairclothSt. Western Blvd. Western Blvd. Centennial Parkway GormanSt. Avent Ferry Rd. NC State University Solar House

  16. Architectural Portfolio 2001: Main Winners.

    ERIC Educational Resources Information Center

    American School & University, 2001

    2001-01-01

    Presents descriptions and photographs of the following two American School and University Architectural Portfolio main winners for 2001: Chesterton, Indiana's Chesterton High School and Lied Library at the University of Nevada, Las Vegas. Included are each project's vital statistics, the architectural firm involved, and a list of designers.(GR)

  17. Protéger les mains au travail

    Microsoft Academic Search

    M. B. Cleenewerck

    2009-01-01

    Hands are the main tools of most of manual workers. Application of individual skin preventive measures is essential in many jobs. A strategic program for protection of the skin of the hands will be proposed. Before and during work, the use of protective creams and\\/or gels as well as protective gloves represents the first step. After work, the use of

  18. Library Site Finder MAIN LIBRARY

    E-print Network

    Sidorov, Nikita

    Library Site Finder MAIN LIBRARY Burlington Street Tel: 0161 275 3751 THE ALAN GILBERT LEARNING COMMONS Oxford Road Tel: 0161 306 4306 ART & ARCHAEOLOGY LIBRARY Mansfield Cooper Building Tel: 0161 275 3657 BRADDICK LIBRARY School of Physics & Astronomy Brunswick Street Tel: 0161 275 4078 EDDIE DAVIES

  19. Gulf of Maine Research Institute

    NSDL National Science Digital Library

    2003-05-01

    This web site contains illustrated information and classroom-ready activities for teachers, students, and anyone who want to learn about aquatic environments. The site is divided into seven topical sites, either by habitat or species. "Space Available" focuses on using satellite imagery to study the oceans and includes sections on the human impact on oceans, weather, remote sensing, and how satellites work. "All About Lobsters" includes information on the life cycle of lobsters, lobster trivia, and fishery information. "All About Turtles" includes a section on turtle anatomy, defenses, and species, and how you can help turtles. The "On Location" section includes information on coral reefs in Belize, global climate change, Israel and the Red Sea, and information on the deep submergence vehicle, ALVIN. "Katahdin to the Sea" looks at streams, ponds, aquifers, bogs, estuaries, beaches, tidepools, and the Gulf of Maine. The "Streams" section includes information on the history of Maine and water, and information on pollution and water.

  20. LSRA with Shuttle main gear

    NASA Technical Reports Server (NTRS)

    1993-01-01

    A space shuttle landing gear system is visible between the two main landing gear components on this NASA CV-990, modified as a Landing Systems Research Aircraft (LSRA). The space shuttle landing gear test unit, operated by a high-pressure hydraulic system, allowed engineers to assess and document the performance of space shuttle main and nose landing gear systems, tires and wheel assemblies, plus braking and nose wheel steering performance. The series of 155 test missions for the space shuttle program, conducted at NASA's Dryden Flight Research Center, Edwards, California, provided extensive data about the life and endurance of the shuttle tire systems and helped raise the shuttle crosswind landing limits at Kennedy.

  1. Main Results of Grossversuch IV.

    NASA Astrophysics Data System (ADS)

    Federer, B.; Waldvogel, A.; Schmid, W.; Schiesser, H. H.; Hampel, F.; Schweingruber, Marianne; Stahel, W.; Bader, J.; Mezeix, J. F.; Doras, Nadie; D'Aubigny, G.; Dermegreditchian, G.; Vento, D.

    1986-07-01

    The main results of a randomized hail suppression experiment, Grossversuch IV, are presented in this paper. Grossversuch IV tested the `Soviet' hail prevention method during five years (1977-81). The field experiment took place in central Switzerland with the participation of research groups from France, Italy and Switzerland.A very dense hailpad network (330 hailpads over 1300 km2) and a carefully calibrated 10-cm radar were used to measure in two independent ways the hail kinetic energy of seeded and unseeded hail cells. The total sample included 216 cells. The main result of the confirmatory as well as most of the exploratory analyses is that there is no statistically significant difference between seeded and unseeded hail cells. A detailed discussion of the reliability of the measurements, tests and methods is given together with a discussion about possibilities of future evaluations of the Grossversuch IV data and other cloud seeding experiments.

  2. Heavy hydrocarbon main injector technology

    NASA Technical Reports Server (NTRS)

    Fisher, S. C.; Arbit, H. A.

    1988-01-01

    One of the key components of the Advanced Launch System (ALS) is a large liquid rocket, booster engine. To keep the overall vehicle size and cost down, this engine will probably use liquid oxygen (LOX) and a heavy hydrocarbon, such as RP-1, as propellants and operate at relatively high chamber pressures to increase overall performance. A technology program (Heavy Hydrocarbon Main Injector Technology) is being studied. The main objective of this effort is to develop a logic plan and supporting experimental data base to reduce the risk of developing a large scale (approximately 750,000 lb thrust), high performance main injector system. The overall approach and program plan, from initial analyses to large scale, two dimensional combustor design and test, and the current status of the program are discussed. Progress includes performance and stability analyses, cold flow tests of injector model, design and fabrication of subscale injectors and calorimeter combustors for performance, heat transfer, and dynamic stability tests, and preparation of hot fire test plans. Related, current, high pressure, LOX/RP-1 injector technology efforts are also briefly discussed.

  3. STATISTICAL METHOD TO IDENTIFY KEY ANTHROPOMETRIC PARAMETERS IN HRTF INDIVIDUALIZATION

    E-print Network

    Zhang, Wen

    STATISTICAL METHOD TO IDENTIFY KEY ANTHROPOMETRIC PARAMETERS IN HRTF INDIVIDUALIZATION M. Zhang, R, Australia ABSTRACT This paper identifies the main anthropometric parameters which strongly influence information, along with all anthropometric parameters, is intro- duced in the multiple linear regression

  4. Bidimensional Parameters and Local Treewidth

    Microsoft Academic Search

    Erik D. Demaine; Fedor V. Fomin; Mohammad Taghi Hajiaghayi; Dimitrios M. Thilikos

    2004-01-01

    For several graph theoretic parameters such as vertex cover and dominating set, it is known that if their values are bounded by k then the treewidth of the graph is bounded by some function of k. This fact is used as the main tool for the design of several flxed-parameter algorithms on minor-closed graph classes such as planar graphs, single-crossing-minor-free

  5. 78 FR 70545 - KEI (Maine) Power Management (I) LLC, KEI (Maine) Power Management (II) LLC, KEI (Maine) Power...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-26

    ...11472-060, 11132-028, 11482-030, 4202-023, 3562-024] KEI (Maine) Power Management (I) LLC, KEI (Maine) Power Management (II) LLC, KEI (Maine) Power Management (III) LLC, KEI (Maine) Power Management (IV)...

  6. Affective Learning — A Manifesto

    Microsoft Academic Search

    R W Picard; S Papert; W Bender; B Blumberg; C Breazeal; D Cavallo; T Machover; M Resnick; D Roy; C Strohecker

    2004-01-01

    The use of the computer as a model, metaphor, and modelling tool has tended to privilege the 'cognitive' over the 'affective' by engendering theories in which thinking and learning are viewed as information processing and affect is ignored or marginalised. In the last decade there has been an accelerated flow of findings in multiple disciplines supporting a view of affect

  7. Free Parameters and Frameworks in Minimal Supersymmetry

    E-print Network

    California at Berkeley, University of

    405 Appendix A Free Parameters and Frameworks in Minimal Supersymmetry It is useful to discuss what the various schemes that exist for reducing the set of free parameters to a manageable number. The information, and so is fixed by experiment. The free parameters consist mainly of the coe#cients of the ``soft

  8. Free Parameters and Frameworks in Minimal Supersymmetry

    E-print Network

    California at Berkeley, University of

    405 Appendix A Free Parameters and Frameworks in Minimal Supersymmetry It is useful to discuss what the various schemes that exist for reducing the set of free parameters to a manageable number. The information, and so is fixed by experiment. The free parameters consist mainly of the coefficients of the "soft

  9. Mount Apatite Park, Auburn, Maine

    NSDL National Science Digital Library

    This guide discusses the geology, mineralogy, and mineral collecting opportunities of the Mount Apatite quarries at Auburn, Maine. Topics include the history and occurrence of the granite pegmatites, which contain collectible specimens of apatite, tourmaline, lepidolite, and other minerals; the history of glaciation in the area; and the history of the mining industry in Auburn, an important producer of commercial feldspar in the early 1900s. There is also information for mineral collectors, including permission and access, directions, and information on the exposures and how to extract specimens from them. References and links to additonal information are included.

  10. Bald Mountain, Washington Plantation, Maine

    NSDL National Science Digital Library

    This guide provides information on the geology of Bald Mountain, an outstanding example of an unvegetated mountain summit in western Maine. Topics include the petrology of the metamorphic rocks exposed on the mountain (layered quartzite and schist), which preserve evidence of their sedimentary origin (graded bedding, cross-bedding). There is also information on the glacial history of the area, as indicated by the presence of glacial striations and erratics. For visitors, there is information on permission and access, directions, sampling information, and activities. References are included.

  11. Space transportation main engine cycle assessment process

    NASA Technical Reports Server (NTRS)

    Mcconnaughey, H. V.; Lyles, G. M.

    1991-01-01

    The Advanced Launch System (ALS) program selection process for a space transportation main engine (STME) power cycle is described in terms of the methodology employed. Low cost, robustness, and high reliability are the primary parameters for engine choice, suggesting simplicity of design and efficient fabrication methods as the crucial characteristics. An evaluation methodology is developed based on the Pugh (1981) process and the King (1989) matrices. The cycle configurations considered are the gas generator (GG), the closed expander, and the open expander. The cycle assessment team determined that the GG cycle is favored by most cycle discriminators, based on an assessment of the characteristics in terms of ALS goals. The lower development risk of the GG-cycle STME is consistent with the goals of the ALS program in terms of reliability and cost efficiency.

  12. arXiv:astroph/0107349 ALL-STOKES PARAMETERIZATION OF THE MAIN BEAM AND FIRST

    E-print Network

    O'Neil, Karen

    , equivalently, the main beam eÆciency); for the other Stokes parameters the beam parameters include beam squint). In polarized emission, the e#11;ects of beam squint (di#11;erence in pointing direction between orthogonal

  13. Jupiter's Main Ring/Ring Halo

    NASA Technical Reports Server (NTRS)

    1997-01-01

    A mosaic of four images taken through the clear filter (610 nanometers) of the solid state imaging (CCD) system aboard NASA's Galileo spacecraft on November 8, 1996, at a resolution of approximately 46 kilometers (28.5 miles) per picture element (pixel) along Jupiter's rings. Because the spacecraft was only about 0.5 degrees above the ring plane, the image is highly foreshortened in the vertical direction. The images were obtained when Galileo was in Jupiter's shadow, peering back toward the Sun; the ring was approximately 2.3 million kilometers (1.4 million miles) away. The arc on the far right of the image is produced when sunlight is scattered by small particles comprising Jupiter's upper atmospheric haze. The ring also efficiently scatters light, indicating that much of its brightness is due to particles that are microns or less in diameter. Such small particles are believed to have human-scale lifetimes, i.e., very brief compared to the solar system's age.

    Jupiter's ring system is composed of three parts - - a flat main ring, a lenticular halo interior to the main ring, and the gossamer ring, outside the main ring. The near and far arms of Jupiter's main ring extend horizontally across the mosaic, joining together at the ring's ansa, on the figure's far left side. The near arm of the ring appears to be abruptly truncated close to the planet, at the point where it passes into Jupiter's shadow. Some radial structure is barely visible across the ring's ansa (top image). A faint mist of particles can be seen above and below the main rings. This vertically extended 'halo' is unusual in planetary rings, and is probably caused by electromagnetic forces pushing the smallest grains out of the ring plane. Because of shadowing, the halo is not visible close to Jupiter in the lower right part of the mosaic. To accentuate faint features in the bottom image of the ring halo, different brightnesses are shown through color. Brightest features are white or yellow and the faintest are purple.

    Jupiter's main ring is a thin strand of material encircling the planet. The diffuse innermost boundary begins at approximately 123,000 kilometers (76,429 miles). The main ring's outer radius is found to be at 128,940 kilometers (80,119 miles) +/-50 kilometers (31 miles), slightly less than the Voyager value of 129,130 kilometers (80,237 miles) +/-100 kilometers (62 miles), but very close to the orbit of the satellite Adrastea (128,980 kilometers or 80,144 miles). The main ring exhibits a marked drop in brightness at 127,849 kilometers (79,441 miles) +/-50 kilometers (31 miles), lying almost atop the orbit of the Jovian moon Metis at 127,978 kilometers (79,521 miles). Satellites seem to affect the structure of even tenuous rings like those found at Jupiter.

    The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. JPL is an operating division of California Institute of Technology (Caltech).

    This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URL http://galileo.jpl.nasa.gov. Background information and educational context for the images can be found at URL http://www.jpl.nasa.gov/galileo/sepo

  14. Geospatial assessments of potato production systems in Maine

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Although Maine produces high quality potatoes, the average marketable yield is substantially lower than production areas in the western USA. Potential factors affecting yield include soil-water availability (timing of water stress and stress alleviation events), pest and disease control strategies, ...

  15. Rotational mixing in tidally locked massive main sequence binaries

    Microsoft Academic Search

    S. E. de Mink; M. Cantiello; N. Langer; O. R. Pols

    2009-01-01

    One of the main uncertainties in evolutionary calculations of massive stars is the efficiency of internal mixing. It changes the chemical profile inside the star and can therefore affect the structure and further evolution. We demonstrate that eclipsing binaries, in which the tides synchronize the rotation period of the stars and the orbital period, constitute a potentially strong test for

  16. Optimal Design and Test of Main Magnet in Superconducting MRI

    Microsoft Academic Search

    Chunli Wu; Jialiang Guo; Chuan Chen; Guo Yan; Chengshan Li

    2010-01-01

    The magnet system is an important part in magnetic resonance imaging (MRI) equipment, the performance of which directly affects the quality of the imaging. Improving the homogeneity of the magnetic field is an effective means to increase the signal-to-noise ratio (SNR). A high SNR ensures a good imaging. This paper mainly investigates the optimal design and homogenizing field analysis of

  17. Preparations and main results Some useful stuff

    E-print Network

    Neunhöffer, Max

    Preparations and main results Some useful stuff Proofs Kazhdan-Lusztig basis and Wedderburn and main results Some useful stuff Proofs Preparations Main results Setup Let W, S be a finite Coxeter and main results Some useful stuff Proofs Preparations Main results Main results I Proposition 1 : B := (Cd

  18. Review of critical factors affecting crude corrosivity

    SciTech Connect

    Tebbal, S.; Kane, R.D. [CLI International, Inc., Houston, TX (United States)

    1996-08-01

    Lower quality opportunity crudes are now processed in most refineries and the source of the crudes may vary daily. These feedstocks, if not properly handled, can result in reduction in service life of equipment as well as costly failure and downtime. Analytical tools are needed to predict their high temperature corrosivity toward distillation units. Threshold in total sulfur and total acid number (TAN) have been used for many years as rules of thumb for predicting crude corrosivity, However, it is now realized that they are not accurate in their predictive ability. Crudes with similar composition and comparable with respect to process considerations have been found to be entirely different in their impact on corrosion. Naphthenic acid content, sulfur content, velocity, temperature, and materials of construction are the main factors affecting the corrosion process, Despite progress made in elucidating the role of the different parameters on the crude corrosivity process, the main problem is in calculating their combined effect, especially when the corroding stream is such a complex mixture. The TAN is usually related directly to naphthenic acid content. However, discrepancies between analytical methods and interference of numerous components of the crude itself lead to unreliable reported content of naphthenic acid. The sulfur compounds, with respect to corrosivity, appear to relate more to their decomposition at elevated temperature to form hydrogen sulfide than to their total content in crude. This paper reviews the present situation regarding crude corrosivity in distillation units, with the aim of indicating the extent of available information, and areas where further research is necessary.

  19. DIS2002 | 87 affective computation, affective interaction,

    E-print Network

    Höök, Kristina

    ] Affective computation, or the development of computational systems which can be aware of and respond-used integrative cognitive theory of emotion of Ortony, Clore and Collins, for example, defines emotions in terms of emotions [15]. Ark's Emotion Mouse extends a normal computer mouse to deduce users' emotional states from

  20. Bedrock Geologic Map of Maine

    NSDL National Science Digital Library

    In this activity students study a map of bedrock geology which describes the types of rocks that exist in a given area. It shows these rock units as well as their known and inferred contacts. Consideration is also given to folding, faulting, unconformities, and similar rock relationships. These features are often included in bedrock geology maps. Students study the legend and scale and become aware of the other information that is included on the map such as the stratigraphic column, list of formations, and inset map of metamorphic grade. Students then locate their city or town and draw a 40-mile diameter circle around it and identify all the symbols inside the circle and the age of the various rocks. Student question sheets are available at this site. Although this activity was written for a map of Maine, it will work in any state where geological maps are available.

  1. Space shuttle main engine controller

    NASA Technical Reports Server (NTRS)

    Mattox, R. M.; White, J. B.

    1981-01-01

    A technical description of the space shuttle main engine controller, which provides engine checkout prior to launch, engine control and monitoring during launch, and engine safety and monitoring in orbit, is presented. Each of the major controller subassemblies, the central processing unit, the computer interface electronics, the input electronics, the output electronics, and the power supplies are described and discussed in detail along with engine and orbiter interfaces and operational requirements. The controller represents a unique application of digital concepts, techniques, and technology in monitoring, managing, and controlling a high performance rocket engine propulsion system. The operational requirements placed on the controller, the extremely harsh operating environment to which it is exposed, and the reliability demanded, result in the most complex and rugged digital system ever designed, fabricated, and flown.

  2. Factors affecting dystocia in cattle.

    PubMed

    Zaborski, D; Grzesiak, W; Szatkowska, I; Dybus, A; Muszynska, M; Jedrzejczak, M

    2009-06-01

    The paper reviews the various factors affecting dystocia in cattle. It is based mainly on the recent studies found in the literature of the subject but refers occasionally to some older papers as well. The factors are grouped into four main categories: direct factors, phenotypic factors related to calf and cow, non-genetic and genetic factors. The first group includes malpresentations and uterine torsion. The second one includes: calf birth weight, multiple calvings, perinatal mortality, cow pelvic area, cow body weight and body condition at calving, gestation length. The non-genetic factors are: cow age and parity, year and season of calving, place of calving, maintenance practises, disorders, calf sex and nutrition. Other non-genetic factors are the level of hormones in the periparturient period, in vitro production of embryos and embryo cloning. Finally, the genotypes of cow, bull and calf, inbreeding, muscular hypertrophy, selection and quantitative trait loci form the fourth group of genetic factors. PMID:19055561

  3. Visualizing the Shields Parameter

    NSDL National Science Digital Library

    Tom Hickson

    This is not so much an activity as it is a useful tool to build an activity around. I created an Excel spreadsheet that calculates the Shields parameter and the grain Reynolds number for a given set of conditions, then plots the resultant values on the Shields diagram. Thus, students can tweak the boundary shear stress value to calculate the stress required to move a given grain size in any fluid, under any gravitational conditions. It is a great way for them to understand how changes in fluid density and viscosity (water vs. air) affect initiation of motion, as well as the effects of grain size. I might use this in a lecture on initiation of motion, asking them to answer some basic questions (see attached example).

  4. Affective Intelligence: The Human Face of AI

    Microsoft Academic Search

    Lori Malatesta; Kostas Karpouzis; Amaryllis Raouzaiou

    2009-01-01

    Affective computing has been an extremely active research and development area for some years now, with some of the early\\u000a results already starting to be integrated in human-computer interaction systems. Driven mainly by research initiatives in\\u000a Europe, USA and Japan and accelerated by the abundance of processing power and low-cost, unintrusive sensors like cameras\\u000a and microphones, affective computing functions in

  5. Main memory unit. [hybrid computers

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The development of a main memory unit (MMU) for the space ultrareliable module computer (SUMC) model HTC is discussed. The design, fabrication, and test of basic memory modules (BMM) which were to be used in the design and construction of the MMU are described. The BMM was designed from state-of-the-art technologies which included large scale integration devices mounted and interconnected on a substrate to form a functional module to be utilized in the MMU development. A SUMC memory system design study is discussed which addressed itself to the BMM design and analysis to be conducted to determine the most efficient organization of the BMM in order to establish such modularity features as: word length expandability without redesign, high reliability, and fault tolerance. One MMU was designed, fabricated, tested, and delivered which will be electrical and mechanically compatible with the hybrid technology computer (HTC) model of the SUMC family of computers. The MMU will contain a storage capacity of 8196 36 bit words which includes a parity bit for each 8 bit byte of data.

  6. Main Dangers of Our Times.

    NASA Astrophysics Data System (ADS)

    Synek, Miroslav

    2003-03-01

    Terrorism and threatening dictatorships are the main, man-made, dangers of our times. They are run by master demagogues, or, brain-washing manipulators. ----- Our next step in coping with terrorism is to counter master demagoguery. Therefore, supporting EDUCATION that would emphasize the most unifying (and the least controversial), yet, BASIC CIVIC RESPECT for lives of people in a civilian human society, is a priority everywhere on our planet. ----- At the same time we start facing mostly small, threatening, dictatorships, capable of producing weapons of mass destruction. Therefore, we have to try to contribute to developing systems of FREE ELECTIONS, controlling weapons of mass destruction, wherever such dangers exist. ----- In a foreseeable future, unfortunately, we are facing a danger even by orders of magnitude greater. We are facing a possibility of a mass-produced heavy accumulation of inter-continental nuclear missiles, on a computerized "push-button" control, by a very powerful (and, quite possibly, miscalculating, or, suicidal) dictator, dangerous to the very existence of humanity on our planet. Therefore, it is a historical urgency that such a technological power be under the control by a government of the people, by the people and for the people, based on a sufficiently reliable system of FREE ELECTIONS, wherever, on our planet, such a potential danger may originate.

  7. Arsenic on Main St., Unity ME

    NSDL National Science Digital Library

    Lois Ongley

    Class description Analytical Chemistry syllabus (Microsoft Word 2007 (.docx) 42kB Feb8 10) Timeline Spring 2010 - Analytical Chemistry students implement the pilot project after learning to use the analytical equipment in a "standard" course context. Pilot Project - As a service to Unity College employees, students will analyze water samples brought in by faculty and staff using techniques learned during the semester. Students will collaborate to draft a letter describing the water quality (in terms of the measured parameters) including an recommendation that the water be analyzed at a certified laboratory. Student assessment of the project will be used to modify the database, suggest activities for the full blown event planned for the next year. Based on this work, I will ask a local NGO to "request" a similar event be held in town. As an alternate to a final exam, students will present the results of this work at the Unity College Student Conference during Finals week. Summer 2010 - I have applied for a faculty research grant to work with a student and examine water quality "downtown" (Unity has a total population of about 1500 residents). 2010-2011 - There are at least 2 possibilities: either a lab section of General Chemistry 2 or an upper-level topics class on Arsenic (my preference) will undertake planning for the "Water Days" event during Spring 2011. Projects on which students could work will include informational brochures, posters, and K12 lessons. The Water Days event will include invitations to local analytical chemical labs and water conditioning companies to set up information displays. The data solicited from those who submit samples will include: contact information, well depth, age, existing water conditioning capability, any current complaints. Research Rationale: In 1995, Caswell, Eichler & Hill, Inc. evaluated the "current state of the groundwater resources" in the downtown Unity, ME area for the Town of Unity (1). Analysis of the data available from 76 wells and springs in 3 aquifers (esker, marine sand, and bedrock) found 11 wells with arsenic concentrations ranging from 0.001 to 0.200 mg/L. Other water quality issues, notably hardness (22 wells), elevated iron concentrations (20 wells), and bacterial contamination (8 wells) were noted. This report seems to have generated little further investigation. Leaching of arsenic in aquifers from meta-sedimentary bedrock high in sulfides is well documented in Central Maine (7), though arsenic leached from unconsolidated aquifers also exists (8, for example). Arsenic in Eastern New England groundwater has been weakly correlated to elevated pH (8), which plausibly explains dissolved As IV, but less so As III, which is often associated with highly reduced conditions. The health hazards of arsenic are now well-known. Chronic exposure to low levels of arsenic in drinking water has been shown to cause multiple cancers, as well pigment changes and thickening of the skin on hands and feet (palmoplantar hyperkeratosis) (2). Chronic ingestion has also been linked to skin lesions, liver disease, cardiovascular disease, and a decrease in production of red and white blood cells due to bone marrow depression (2). Based on personal discussions with state officials, the health hazard most of concern in Maine is bladder cancer. Arsenic in ground water is an issue of national and international concern, and of particular importance in Maine, which has naturally occurring arsenic in groundwater and well water (3, 4). Currently the National Institute of Environmental Health Sciences is funding a multilevel investigation of arsenic toxicity, mobilization and mitigation, including characterization of failed arsenic treatment systems in Central Maine (5). This project seeks to answer the following questions: Does water quality on Main St in Unity depend on the aquifer in which a resident's well is completed? A statistically sufficient number of wells in each aquifer will be analyzed for "normal" water quality parameters (pH, alkalinity, hardness, phosphate, chloride for example) an

  8. 75 FR 27863 - Savings Bank of Maine, MHC and Savings Bank of Maine, Gardiner, Maine; Approval of Conversion...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-18

    ...TREASURY Office of Thrift Supervision [AC-38: OTS Nos. 06947 and H 4709] Savings Bank of Maine, MHC and Savings Bank of Maine, Gardiner, Maine; Approval of Conversion Application Notice is hereby given that on May 7, 2010, the...

  9. Inner main belt asteroids in Slivan states?

    NASA Astrophysics Data System (ADS)

    Vraštil, J.; Vokrouhlický, D.

    2015-07-01

    Context. The spin state of ten asteroids in the Koronis family has previously been determined. Surprisingly, all four asteroids with prograde rotation were shown to have spin axes nearly parallel in the inertial space. All asteroids with retrograde rotation had large obliquities and rotation periods that were either short or long. The Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect has been demonstrated to be able to explain all these peculiar facts. In particular, the effect causes the spin axes of the prograde rotators to be captured in a secular spin-orbit resonance known as Cassini state 2, a configuration dubbed "Slivan state". Aims: It has been proposed based on an analysis of a sample of asteroids in the Flora family that Slivan states might also exist in this region of the main belt. This is surprising because convergence of the proper frequency s and the planetary frequency s6 was assumed to prevent Slivan states in this zone. We therefore investigated the possibility of a long-term stable capture in the Slivan state in the inner part of the main belt and among the asteroids previously observed. Methods: We used the swift integrator to determine the orbital evolution of selected asteroids in the inner part of the main belt. We also implemented our own secular spin propagator into the swift code to efficiently analyze their spin evolution. Results: Our experiments show that the previously suggested Slivan states of the Flora-region asteroids are marginally stable for only a small range of the flattening parameter ?. Either the observed spins are close to the Slivan state by chance, or additional dynamical effects that were so far not taken into account change their evolution. We find that only the asteroids with very low-inclination orbits (lower than ?4°, for instance) could follow a similar evolution path as the Koronis members and be captured in their spin state into the Slivan state. A greater number of asteroids in the inner main-belt Massalia family, which are at a slightly larger heliocentric distance and at lower inclination orbits than in the Flora region, may have their spin in the Slivan state.

  10. Inverse Spectral Problem Proof of Main Result

    E-print Network

    Stanhope, Liz

    Inverse Spectral Problem Proof of Main Result Geodesics on Weighted Projective Spaces Zuoqin Wang of Main Result Inverse Spectral Geometry Main Result Inverse Spectral Geometry Manifold setting: (M, g Proof of Main Result Inverse Spectral Geometry Main Result Inverse Spectral Geometry Manifold setting

  11. 21 CFR 808.69 - Maine.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 8 2011-04-01 2011-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

  12. 75 FR 22167 - Maine Disaster #ME-00025

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-27

    ...Disaster Declaration 12126 and 12127] Maine Disaster ME-00025 AGENCY: U.S...declaration of a disaster for the State of MAINE dated 04/19/2010. Incident: Severe...Counties: York. Contiguous Counties: Maine: Cumberland, Oxford. New...

  13. 78 FR 34701 - Maine Disaster #ME-00036

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-10

    ...Disaster Declaration 13592 and 13593] Maine Disaster ME-00036 AGENCY: U.S...declaration of a disaster for the State of Maine dated 05/30/2013. Incident: Apartment...Androscoggin. Contiguous Counties: Maine: Cumberland, Franklin, Kennebec,...

  14. 21 CFR 808.69 - Maine.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 8 2012-04-01 2012-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

  15. 21 CFR 808.69 - Maine.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 8 2013-04-01 2013-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

  16. 21 CFR 808.69 - Maine.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 8 2014-04-01 2014-04-01 false Maine. 808.69 Section 808.69 Food and Drugs...Specific State and Local Exemptions § 808.69 Maine. (a) The following Maine medical device requirement is enforceable...

  17. [Affect and mimetic behavior].

    PubMed

    Zepf, S; Ullrich, B; Hartmann, S

    1998-05-01

    The relationship between facial expression and experienced affect presents many problems. The two diametrically opposed positions proposing solutions to this problem are exemplified using the conceptions of Mandler u. Izard. The underlying premises of both conceptions still prevail in various forms. The authors reject the concepts according to which facial expression is merely correlated to the affects (see Mandler 1975) as well as the view that facial expression controls the affects (see Izard 1977). The relationship between affect and facial expression is reexamined, subjecting it to a semiotic, essentially semantic analysis similar to the Ogden and Richards' language and meaning approach. This analysis involves a critical discussion of Scherer's attempt of a purely communicational interpretation using Bühler's organon model. In the author's approach, facial expression is seen not simply as a system of signals, but as a system of representative signs which signify the affects and refer to the emotive meaning of things for the subject. The authors develop the thesis that human beings are not born simply with the ability to speak, but also with the abstract possibility of performing facial expressions. This ability develops by way of coordinating patterns of expressions, which are presumably phylogenetically determined, with affects that take on a socially determined individual form, similar to language acquisition during socialisation. The authors discuss the methodological implications arising for studies investigating the affective meaning of facial expressions. PMID:9632951

  18. Design parameters Summary Design parameters Summary

    E-print Network

    Liske, Jochen

    Design parameters ­ Summary 634 Design parameters ­ Summary Overall characteristics Entrance pupil 13994.53 mm Diffraction-limited field of view (Strehl Ratio 0.80) As-designed =0.5 µm (on curved field mirror #12;Design parameters ­ Summary 635 Overall characteristics Focal stations 6 Incl. 1 reserved

  19. Toward a Minimal Representation of Affective Gestures

    Microsoft Academic Search

    Donald Glowinski; Nele Dael; Antonio Camurri; Gualtiero Volpe; Marcello Mortillaro; Klaus Scherer

    2011-01-01

    This paper presents a framework for analysis of affective behavior starting with a reduced amount of visual information related to human upper-body movements. The main goal is to individuate a minimal representation of emotional displays based on nonverbal gesture features. The GEMEP (Geneva multimodal emotion portrayals) corpus was used to validate this framework. Twelve emotions expressed by 10 actors form

  20. Affective Relationship Patterns and Psychotherapeutic Change

    Microsoft Academic Search

    Eva Bänninger-Huber; Christine Widmer

    1999-01-01

    In this study, the significance of psychotherapeutic interaction for psychotherapeutic change is explored. Videotaped therapy sessions are analyzed with microanalytic methods (Frames, FACS), integrating verbal and nonverbal aspects (mainly facial expression) of the interaction. In a single case investigated, specific interactive patterns in the context of guilt feelings are identified (so called traps and prototypical affective microsequences [PAMs]). These interactive

  1. Characterization of the main components of the GTCAO system: 373 actuators DM and Ocam2 camera

    NASA Astrophysics Data System (ADS)

    Bello, Dolores; Boucher, Luc; Rosado, Mireia; Castro López, Javier; Feautrier, Philippe

    2013-12-01

    Adaptive optics systems rely on wavefront correctors and wavefront sensors as main components. At GTC, we are integrating the adaptive optics system, which is a classic, single conjugate. However, it will employ a 373 a actuators (21x21) DM from CILAS and the camera employed at the wavefront sensor will be OCam2 a state of the art camera based on L3CCD technology. OCam2 is one of the most perfomant camera for Adaptive Optics offering at the same time very low readout noise (subelectron noise) at very high frame rate (>1Kfps). Both components have been extensively tested at our premises, and the results are presented here. A better knowledge of these components allows having a more efficient adaptive optics system. The DM is characterized by means of interferometric measurements to assess its main parameters, as inter-actuator stroke, full mechanical actuator stroke, homogeneity of the influence function, hysteresis... On the other hand, we have at our premises two Ocam2 cameras with CCD220 detector (one science, one engineering) since November 2011. Our characterization included the main parameters of the cameras, and concluded that they meet the requirements needed for GTCAO wavefront sensor. The scientific grade camera has been characterized not only to check its compliance to GTCAO requirements but also to obtain typical camera performances and understand its behavior in depth. We also benefit from this characterization phase to develop and implement an optimization process. Some unknown features which are of general interest have been reported even if they don't affect OCAM2 camera compliance with GTCAO system.

  2. Seasonal affective disorder.

    PubMed

    Lurie, Stephen J; Gawinski, Barbara; Pierce, Deborah; Rousseau, Sally J

    2006-11-01

    Patients with seasonal affective disorder have episodes of major depression that tend to recur during specific times of the year, usually in winter. Like major depression, seasonal affective disorder probably is underdiagnosed in primary care settings. Although several screening instruments are available, such screening is unlikely to lead to improved outcomes without personalized and detailed attention to individual symptoms. Physicians should be aware of comorbid factors that could signal a need for further assessment. Specifically, some emerging evidence suggests that seasonal affective disorder may be associated with alcoholism and attention-deficit/hyperactivity disorder. Seasonal affective disorder often can be treated with light therapy, which appears to have a low risk of adverse effects. Light therapy is more effective if administered in the morning. It remains unclear whether light is equivalent to drug therapy, whether drug therapy can augment the effects of light therapy, or whether cognitive behavior therapy is a better treatment choice. PMID:17111890

  3. Compounds affecting cholesterol absorption

    NASA Technical Reports Server (NTRS)

    Hua, Duy H. (Inventor); Koo, Sung I. (Inventor); Noh, Sang K. (Inventor)

    2004-01-01

    A class of novel compounds is described for use in affecting lymphatic absorption of cholesterol. Compounds of particular interest are defined by Formula I: ##STR1## or a pharmaceutically acceptable salt thereof.

  4. Affective forecasting under uncertainty 

    E-print Network

    Li, Yu-Mei

    2012-11-28

    Affective forecasting denotes the ability to predict one’s own future emotions. Past research indicates that the predictions are generally not precise and people either overestimate or underestimate their emotions. People ...

  5. MAIN THEOREM OF COMPLEX MULTIPLICATION BRIAN CONRAD

    E-print Network

    Conrad, Brian

    MAIN THEOREM OF COMPLEX MULTIPLICATION BRIAN CONRAD In [S, Ch. IV, §18] the Main Theorem of complex and abelian varieties. The aim of the Main Theorem is as follows. Let (A, i) be an abelian variety over Q Galois automorphisms. In these notes, we give a complete proof of the Main Theorem of complex

  6. Implementation techniques for main memory database systems

    Microsoft Academic Search

    David J DeWitt; Randy H Katz; Frank Olken; Leonard D Shapiro; Michael R Stonebraker; David A. Wood

    1984-01-01

    With the availability of very large, relatively inexpensive main memories, it is becoming possible keep large databases resident in main memory In this paper we consider the changes necessary to permit a relational database system to take advantage of large amounts of main memory We evaluate AVL vs B+-tree access methods for main memory databases, hash-based query processing strategies vs

  7. Rotational mixing in tidally locked massive main-sequence binaries

    Microsoft Academic Search

    M. Cantiello; N. Langer; O. R. Pols

    2008-01-01

    One of the main uncertainties in evolutionary calculations of massive stars\\u000ais the efficiency of internal mixing. It changes the chemical profile inside\\u000athe star and can therefore affect the structure and further evolution.\\u000a We demonstrate that eclipsing binaries, in which the tides synchronize the\\u000arotation period of the stars and the orbital period, constitute a potentially\\u000astrong test for

  8. A note on CSP graph parameters

    Microsoft Academic Search

    T. Schiex

    1999-01-01

    Several graph parameters such as induced width, minimum maximum clique size of a chordal completion, -tree number, bandwidth, front length or minimum pseudo-tree height are available in the CSP community to bound the complexity of specific CSP instances using dedicated algorithms. After an introduction to the main algorithms that can exploit these parameters, we try to exhaus- tively review existing

  9. Inertial Parameters for Collective Nuclear Oscillations

    Microsoft Academic Search

    Steven A. Moszkowski

    1956-01-01

    Inertial parameters for nuclear rotation and quadrupole shape oscillation are known to be several times as large as the values assuming irrotational flow. These parameters may be calculated by using a method due to Inglis and applied in recent work by Bohr and Mottelson. The nucleus is assumed to be mainly in the lowest possible intrinsic state, but slightly perturbed

  10. 33 CFR 334.30 - Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy test area.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy test area. 334.30 Section...RESTRICTED AREA REGULATIONS § 334.30 Gulf of Maine off Pemaquid Point, Maine; naval sonobuoy...

  11. Definition of main pollen season using a logistic model.

    PubMed

    Ribeiro, Helena; Cunha, Mário; Abreu, Ilda

    2007-12-01

    This paper proposes a method to unify the definition of the main pollen season based on statistical analysis. For this, an aerobiological study was carried out in Porto region (Portugal), from 2003-2005 using a 7-day Hirst-type volumetric spore trap. To define the main pollen season, a non-linear logistic regression model was fitted to the values of the accumulated sum of the daily airborne pollen concentration from several allergological species. An important feature of this method is that the main pollen season will be characterized by the model parameters calculated. These parameters are identifiable aspects of the flowering phenology, and determine not only the beginning and end of the main pollen season, but are also influenced by the meteorological conditions. The results obtained with the proposed methodology were also compared with two of the most used percentage methods. The logistic model fitted well with the sum of accumulated pollen. The explained variance was always higher than 97%, and the exponential part of the predicted curve was well adjusted to the time when higher atmospheric pollen concentration was sampled. The comparison between the different methods tested showed large divergence in the duration and end dates of the main pollen season of the studied species. PMID:18247462

  12. Photometric parameters Photometric evolution

    E-print Network

    Kruit, Piet van der

    Outline Photometric parameters Photometric evolution Population synthesis STRUCTURE OF GALAXIES 4. Photometric parameters and evolution Piet van der Kruit Kapteyn Astronomical Institute University of Groningen and evolution #12;Outline Photometric parameters Photometric evolution Population synthesis Outline Photometric

  13. Parameters Optimization for Operational Storm Surge/Tide Forecast Model using a Genetic Algorithm

    NASA Astrophysics Data System (ADS)

    Lee, W.; You, S.; Ryoo, S.; Global Environment System Research Laboratory

    2010-12-01

    Typhoons generated in northwestern Pacific Ocean annually affect the Korean Peninsula and storm surges generated by strong low pressure and sea winds often cause serious damage to property in the coastal region. To predict storm surges, a lot of researches have been conducted by using numerical models for many years. Various parameters used for calculation of physics process are used in numerical models based on laws of physics, but they are not accurate values. Because those parameters affect to the model performance, these uncertain values can sensitively operate results of the model. Therefore, optimization of these parameters used in numerical model is essential for accurate storm surge predictions. A genetic algorithm (GA) is recently used to estimate optimized values of these parameters. The GA is a stochastic exploration modeling natural phenomenon named genetic heritance and competition for survival. To realize breeding of species and selection, the groups which may be harmed are kept and use genetic operators such as inheritance, mutation, selection and crossover. In this study, we have improved operational storm surge/tide forecast model(STORM) of NIMR/KMA (National Institute of Meteorological Research/Korea Meteorological Administration) that covers 115E - 150E, 20N - 52N based on POM (Princeton Ocean Model) with 8km horizontal resolutions using the GA. Optimized values have been estimated about main 4 parameters which are bottom drag coefficient, background horizontal diffusivity coefficient, Smagoranski’s horizontal viscosity coefficient and sea level pressure scaling coefficient within STORM. These optimized parameters were estimated on typhoon MAEMI in 2003 and 9 typhoons which have affected to Korea peninsula from 2005 to 2007. The 4 estimated parameters were also used to compare one-month predictions in February and August 2008. During the 48h forecast time, the mean and median model accuracies improved by 25 and 51%, respectively.

  14. Structural dynamic analysis of the Space Shuttle Main Engine

    NASA Technical Reports Server (NTRS)

    Scott, L. P.; Jamison, G. T.; Mccutcheon, W. A.; Price, J. M.

    1981-01-01

    This structural dynamic analysis supports development of the SSME by evaluating components subjected to critical dynamic loads, identifying significant parameters, and evaluating solution methods. Engine operating parameters at both rated and full power levels are considered. Detailed structural dynamic analyses of operationally critical and life limited components support the assessment of engine design modifications and environmental changes. Engine system test results are utilized to verify analytic model simulations. The SSME main chamber injector assembly is an assembly of 600 injector elements which are called LOX posts. The overall LOX post analysis procedure is shown.

  15. Weather affects us

    NSDL National Science Digital Library

    Kimmy

    2009-11-09

    2nd grade weather unit. The students will learn how weather affects us in our daily lives Read and view the video on meteorologists Kid Meteorologist Learn about clouds - watch S'cool Clouds All About Clouds Do scholastic: weather watch and game Weather Read winter storms Interactive Weather Web Pages Read a reason for the season A Reason for the Season Read about precipitation Precipitation Read and view video on flooding Flood: Farming and Erosion Read about air pressure It's a Breeze: How Air Pressure Affects You Read about Hurricanes Hurricanes Do the activities and read ...

  16. 76 FR 7622 - Maine Disaster # ME-00028

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-10

    ...ADMINISTRATION [Disaster Declaration 12461 and 12462] Maine Disaster ME-00028 AGENCY: U.S. Small Business Administration...a major disaster for Public Assistance Only for the State of Maine (FEMA-1953- DR), dated 02/01/2011. Incident:...

  17. 78 FR 20370 - Maine Disaster # ME-00035

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-04

    ...ADMINISTRATION [Disaster Declaration 13525 and 13526] Maine Disaster ME-00035 AGENCY: U.S. Small Business Administration...a major disaster for Public Assistance Only for the State of Maine (FEMA-4108- DR), dated 03/25/2013. Incident:...

  18. 40 CFR 81.320 - Maine.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...east to Dudley Street, Dudley Street south to Cedar Street, Cedar Street west to Main Street, Main Street south to Kennedy Brook, Kennedy Brook northwest crossing Presque Isle Stream to Coburn Street, Coburn Street northwest to Mechanic...

  19. Factors Affecting Photosynthesis!

    E-print Network

    Kudela, Raphael M.

    Factors Affecting Photosynthesis! Temperature Eppley (1972) Light Sverdrup's Critical Depth-493, but the general concept is still valid! ! #12;PB opt & Temperature! #12;Photosynthesis & Temperature! Remember: in the laboratory, we can measure photosynthesis versus irradiance (PvsE) and calculate Ek, Pmax, and alpha

  20. Forces Affecting Educational Decisions.

    ERIC Educational Resources Information Center

    Sullivan, Neil V.

    This speech begins with a discussion of broad social and political patterns and trends that are currently developing and continues to the specific unresolved social issues which will affect the nature and structure of educational systems. Those issues seen by the author is most likely to produce the greatest amount of activity are integration, the…

  1. Affect and altruism

    Microsoft Academic Search

    Bert S. Moore; Bill Underwood; D. L. Rosenhan

    1973-01-01

    Investigated the relationship between affect and altruism in 7- and 8-yr-old middle-class white children (N = 48 males and 24 females). Ss were asked to think of things that made them happy or sad, or they were assigned to control conditions. Ss were then given an opportunity to donate money to other children in the E's absence. In accord with

  2. What Variables Affect Solubility?

    ERIC Educational Resources Information Center

    Baker, William P.; Leyva, Kathryn

    2003-01-01

    Helps middle school students understand the concept of solubility through hands-on experience with a variety of liquids and solids. As they explore factors that affect solubility and saturation, students gain content mastery and an understanding of the inquiry process. Also enables teachers to authentically assess student performance on several…

  3. Factors affecting soil cohesion

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Soil erodibility is a measure of a soil’s resistance against erosive forces and is affected by both intrinsic (or inherent) soil property and the extrinsic condition at the time erodibility measurement is made. Since soil erodibility is usually calculated from results obtained from erosion experimen...

  4. Cholesterol and affective morbidity

    Microsoft Academic Search

    Jess G. Fiedorowicz; Narasimha M. Palagummi; Ole Behrendtsen; William H. Coryell

    2010-01-01

    Depression and mania have been linked with low cholesterol though there has been limited prospective study of cholesterol and subsequent course of affective illness. We studied the relationship between fasting total cholesterol and subsequent depressive and manic symptoms. A total of 131 participants from a prospective cohort study were identified as having had a fasting total cholesterol evaluation at intake.

  5. Hot subdwarfs in (eclipsing) binaries with brown dwarf or low-mass main-sequence companions

    NASA Astrophysics Data System (ADS)

    Schaffenroth, Veronika; Geier, Stephan; Heber, Uli

    2014-09-01

    The formation of hot subdwarf stars (sdBs), which are core helium-burning stars located on the extended horizontal branch, is not yet understood. Many of the known hot subdwarf stars reside in close binary systems with short orbital periods of between a few hours and a few days, with either M-star or white-dwarf companions. Common-envelope ejection is the most probable formation channel. Among these, eclipsing systems are of special importance because it is possible to constrain the parameters of both components tightly by combining spectroscopic and light-curve analyses. They are called HW Virginis systems. Soker (1998) proposed that planetary or brown-dwarf companions could cause the mass loss necessary to form an sdB. Substellar objects with masses greater than >10 M_J were predicted to survive the common-envelope phase and end up in a close orbit around the stellar remnant, while planets with lower masses would entirely evaporate. This raises the question if planets can affect stellar evolution. Here we report on newly discovered eclipsing or not eclipsing hot subdwarf binaries with brown-dwarf or low-mass main-sequence companions and their spectral and photometric analysis to determine the fundamental parameters of both components.

  6. Mining The Sdss-moc Database For Main-belt Asteroid Solar Phase Behavior.

    NASA Astrophysics Data System (ADS)

    Truong, Thien-Tin; Hicks, M. D.

    2010-10-01

    The 4th Release of the Sloan Digital Sky Survey Moving Object Catalog (SDSS-MOC) contains 471569 moving object detections from 519 observing runs obtained up to March 2007. Of these, 220101 observations were linked with 104449 known small bodies, with 2150 asteroids sampled at least 10 times. It is our goal to mine this database in order to extract solar phase curve information for a large number of main-belt asteroids of different dynamical and taxonomic classes. We found that a simple linear phase curve fit allowed us to reject data contaminated by intrinsic rotational lightcurves and other effects. As expected, a running mean of solar phase coefficient is strongly correlated with orbital elements, with the inner main-belt dominated by bright S-type asteroids and transitioning to darker C and D-type asteroids with steeper solar phase slopes. We shall fit the empirical H-G model to our 2150 multi-sampled asteroids and correlate these parameters with spectral type derived from the SDSS colors and position within the asteroid belt. Our data should also allow us to constrain solar phase reddening for a variety of taxonomic classes. We shall discuss errors induced by the standard "g=0.15" assumption made in absolute magnitude determination, which may slightly affect number-size distribution models.

  7. Demographics of Natural Disaster Hotspots in Maine

    Microsoft Academic Search

    Lindsay Dreiss; Caitlin Dufraine

    2008-01-01

    Natural disasters can cause extensive damage to communities and infrastructure. The state of Maine is fairly lucky because natural disasters are relatively infrequent. Maine does, however, experience earthquakes, flooding, hurricanes, and landslides. Certain areas of the state are more prone to experience natural disaster than others. Using GIS analysis, we are analyzing natural disaster hotspots in Maine to determine if

  8. In Maine, Postsecondary Success Starts before College

    ERIC Educational Resources Information Center

    LePage, Paul R.

    2011-01-01

    A 2008 report from the Joint Standing Committee on Education and Culture Affairs of the Maine Legislature indicates a quarter of those who enrolled at a public university in Maine required a remedial course to catch them up to the level where they should have been when they completed high school. Regardless of how hard Maine has tried and how much…

  9. UC SAN DIEGO ELEVATOR LOCATIONS MAIN CAMPUS

    E-print Network

    Tsien, Roger Y.

    UC SAN DIEGO ELEVATOR LOCATIONS MAIN CAMPUS BUILDING # OF ELEVATORS APPLIED PHYSICS AND MATHEMATICS.R.P.S. (ROBINSON BLDG.) ADMIN. 2 I.R.P.S. (LIBRARY BLDG.) 2 ISSACS HALL (NORPAX) 1 LEICHTAG 3 MAIN GYM 2 MANDELL BUILDING # OF ELEVATORS HILLCREST MAIN HOSPITAL 16 HILLCREST AMBULATORY CARE CENTER 2 HILLCREST FACULTY

  10. July 24, 2014 MAIN STREET CONSTRUCTION UPDATE

    E-print Network

    July 24, 2014 MAIN STREET CONSTRUCTION UPDATE Third Street Connector Construction Begins Week, will begin construction of the Third Street Connector between Main St and Broadway. This phase is expected to take about 2 months to complete. PROJECT SCHEDULE Starting July 29, crews will mobilize on Main St

  11. New England: 1. Cod Gulf of Maine

    E-print Network

    New England: 1. Cod ­ Gulf of Maine 2. Cod ­ Georges Bank 3. Haddock ­ Gulf of Maine 4. Haddock New England/Middle Atlantic 8. Yellowtail flounder ­ Cape Cod/Gulf of Maine 9. White Hake 10. Windowpane Flounder ­ Southern New England/Middle Atlantic 11. Winter Flounder ­ Southern New England

  12. New England: 1. Cod Gulf of Maine

    E-print Network

    New England: 1. Cod ­ Gulf of Maine 2. Cod ­ Georges Bank 3. Yellowtail flounder ­ Southern New ­ Georges Bank 7. Winter Flounder ­ Southern New England/Middle Atlantic 8. Pollock - Gulf of Maine / Georges Bank 9. Windowpane - Gulf of Maine / Georges Bank 10. Windowpane - Southern New England / Mid

  13. Main Quantum Algorithms: Shor and Grover

    E-print Network

    de Wolf, Ronald

    Main Quantum Algorithms: Shor and Grover Ronald de Wolf Main Quantum Algorithms: Shor and Grover algorithms Today's lecture: 1. Shor's quantum algorithm for factoring 2. Grover's quantum algorithm for search 3. Other algorithms Main Quantum Algorithms: Shor and Grover ­ p. 2/2 #12;Factoring Given N = p

  14. IMPROVEMENT OF WATER MAIN INSPECTION TECHNOLOGY

    EPA Science Inventory

    This document is a handout of a slide presentation that addresses improvement of water main inspection technology. The slide presentation addresses the need for improved inspection technology (e.g., 237,000 main breaks/yr); the limits on main break prevention; and, the adverse ...

  15. MAINE BEDROCK SOURCE WATER PROTECTION AREAS

    EPA Science Inventory

    Bedrocksqpa_region_pws is a REGIONS SDE layer of bedrock source water protection areas in Maine with a high, moderate, or low probability of contributing water to community public water supplies. The Maine Drinking Water Program (MEDWP), in cooperation with the Maine Geological S...

  16. University of Maine Office of Human Resources

    E-print Network

    Thomas, Andrew

    University of Maine Office of Human Resources EMPLOYEE AUTHORIZATION for the University of Maine Office of Human Resources to Disclose the Identity of Spouse/Domestic Partner to the New Balance Student of Human Resources ("OHR") at the University of Maine to disclose to the New Balance Student Recreation

  17. Arecibo Technical & Operations Memo ATOMS 2000-04 MAIN BEAM AND FIRST SIDELOBE PARAMETERS FOR ARECIBO'S

    E-print Network

    of the Arecibo Observatory 1.15-1.73 GHz (L-Band Wide or LBW) feed at 1420 MHz, where the observation pattern Line Feed (430CH), 430 MHz Gregorian (430G), 1.15-1.71GHz (L-Band Wide, or LBW), 1.27-1.53 GHz (L-Band

  18. MAIN RETRIEVAL SYSTEMS' PARAMETERS ANALYZE Joo Ferreira Alberto Rodrigues da Silva Jos Delgado

    E-print Network

    da Silva, Alberto Rodrigues

    many cases from around 500 retrieval systems using our own modular platform, WebSearchTester. KEYWORDS and diverse in content, context, format, purpose and quality, challenges the validity of previous research. For instance, the size, distribution and dynamic nature of information on the Web make it difficult

  19. Determining the main thermodynamic parameters of caffeine melting by means of DSC

    NASA Astrophysics Data System (ADS)

    Agafonova, E. V.; Moshchenskii, Yu. V.; Tkachenko, M. L.

    2012-06-01

    The temperature and enthalpy of the melting of caffeine, which are 235.5 ± 0.1°C and 19.6 ± 0.2 kJ/mol, respectively, are determined by DSC. The melting entropy and the cryoscopic constant of caffeine are calculated.

  20. Effect of the maximum size of coarse aggregate on the main parameters of concrete

    Microsoft Academic Search

    A. M. Ibragimov

    1989-01-01

    Conclusions 1.A decrease of the water requirement and content of cement and an increase of the density of concrete due to a decrease of the sand content and corresponding increase of the stony component are a positive aspect of increasing the size of the aggregate.2.The consumption of cement with an increase of the size of the aggregate from 40 to

  1. Adaptation of the Main Peripheral Artery and Vein to Long Term Confinement (MARS 500)

    PubMed Central

    Arbeille, Philippe; Provost, Romain; Vincent, Nicole; Aubert, Andre

    2014-01-01

    Purpose The objective was to check if 520 days in confinement (MARS 500), may affect the main peripheral arterial diameter and wall thickness and the main vein size. Method Common carotid (CC) femoral artery (FA) portal vein (PV), jugular (JG), femoral vein (FV) and tibial vein were assessed during MARS 500 by echography, performed by the subjects. A hand free volumic echographic capture method and a delayed 3D reconstruction software developed by our lab were used for collecting and measuring the vascular parameters. Results During the MARS 500 experiment the subjects performed 6 sessions among which 80% of the echographic data were of sufficient quality to be processed. No significant change was found for the Common carotid, Jugular vein, femoral artery, femoral vein, portal vein, and tibial vein diameter. CC and FA IMT (intima media thickness) were found significantly increased (14% to 28% P<0.05) in all the 6 subjects, during the confinement period and also at +2 days after the confinement period, but there was no significant difference 6 month later compare to pre MARS 500. Conclusion The experiment confirmed that even untrained to performing echography the subjects were able to capture enough echographic data to reconstruct the vessel image from which the parameters were measured. The increase in both CC and FA IMT should be in relation with the stress generated by the confined environment or absence of solar radiation, as there was no change in gravity, temperature and air in the MARS 500 module, and minor changes in physical exercise and nutrition. PMID:24475025

  2. Comprehensive affected environment

    SciTech Connect

    NONE

    1995-10-01

    Energy Vision 2020 evaluates the affected environment to help provide a baseline for measuring the environmental consequences of alternative energy strategies. Because this report is also an environmental impact statement, special emphasis is given to the environment. This regional perspective takes in both natural conditions and those resulting from human development. It considers socioeconomic, air, water, and land resources. This section of the Energy Vision 2020 draft report provides the overview for the environmental assessment.

  3. Factors Affecting Gummy Butter.

    E-print Network

    Leighton, R. E. (Rudolph Elmo); Moore, A. V.

    1952-01-01

    LIBRARY A. & M. COLLEGE OF TEXAS Factors Affecting Gummy Butter DIGEST Among the Southcentral States, Texas ranks next to Oklahoma and Kentucky in creamery butter production; in farm butter production Texas is third in the nation...-following Alabama and North Carolina. Second only to flavor in the importance of eating quality is the body of butter. Body is evaluated by the consumer by the manner in which the butter melts or spreads. It is often considered that cows eating cottonseed...

  4. Affective Processes and Academic Achievement.

    ERIC Educational Resources Information Center

    Feshbach, Norma Deitch; Feshbach, Seymour

    1987-01-01

    Data indicate that for girls, affective dispositional factors (empathy, depressive affectivity, aggression, and self-concept) are intimately linked to cognitive development and academic achievement. (PCB)

  5. Empirical validation of the diffusion model for recognition memory and a comparison of parameter-estimation methods.

    PubMed

    Arnold, Nina R; Bröder, Arndt; Bayen, Ute J

    2014-10-01

    The diffusion model introduced by Ratcliff (Psychol Rev 85:59-108, 1978) has been applied to many binary decision tasks including recognition memory. It describes dynamic evidence accumulation unfolding over time and models choice accuracy as well as response-time distributions. Various parameters describe aspects of decision quality and response bias. In three recognition-memory experiments, the validity of the model was tested experimentally and analyzed with three different programs: fast-dm, EZ, and DMAT. Each of three central model parameters was targeted via specific experimental manipulations. All manipulations affected mainly the corresponding parameters, thus supporting the convergent validity of the measures. There were, however, smaller effects on other parameters, showing some limitations in discriminant validity. PMID:25281426

  6. Managing Affect in Learners' Questions in Undergraduate Science

    ERIC Educational Resources Information Center

    Pedrosa-de-Jesus, Helena; Watts, Mike

    2014-01-01

    This article aims to position students' classroom questioning within the literature surrounding affect and its impact on learning. The article consists of two main sections. First, the act of questioning is discussed in order to highlight how affect shapes the process of questioning, and a four-part genesis to question-asking that we call…

  7. 77 FR 12909 - Eastern Maine Railway Company-Acquisition and Operation Exemption-Montreal, Maine & Atlantic...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-02

    ...Surface Transportation Board [Docket No. FD 35588] Eastern Maine Railway Company--Acquisition and Operation Exemption--Montreal, Maine & Atlantic Railway, Ltd. Eastern Maine Railway Company (EMR), a Class III rail carrier, has...

  8. intro, 2 bars main riff, 4 bars

    E-print Network

    Reiners, Peter W.

    intro, 2 bars main riff, 4 bars verse riff 1: G G if you like to gamble, I tell you I'm your man G G you win some, loose some, it's all the same to me main riff with fill 1, 4 bars verse riff 2: D C the pleasure is to play it makes no difference what you say main riff with fill 1, 2 bars verse riff 2: D C I

  9. Selection of Wire Electrical Discharge Machining Process Parameters on Stainless Steel AISI Grade-304 using Design of Experiments Approach

    NASA Astrophysics Data System (ADS)

    Lingadurai, K.; Nagasivamuni, B.; Muthu Kamatchi, M.; Palavesam, J.

    2012-06-01

    Wire electrical discharge machining (WEDM) is a specialized thermal machining process capable of accurately machining parts of hard materials with complex shapes. Parts having sharp edges that pose difficulties to be machined by the main stream machining processes can be easily machined by WEDM process. Design of Experiments approach (DOE) has been reported in this work for stainless steel AISI grade-304 which is used in cryogenic vessels, evaporators, hospital surgical equipment, marine equipment, fasteners, nuclear vessels, feed water tubing, valves, refrigeration equipment, etc., is machined by WEDM with brass wire electrode. The DOE method is used to formulate the experimental layout, to analyze the effect of each parameter on the machining characteristics, and to predict the optimal choice for each WEDM parameter such as voltage, pulse ON, pulse OFF and wire feed. It is found that these parameters have a significant influence on machining characteristic such as metal removal rate (MRR), kerf width and surface roughness (SR). The analysis of the DOE reveals that, in general the pulse ON time significantly affects the kerf width and the wire feed rate affects SR, while, the input voltage mainly affects the MRR.

  10. Solar astrophysical fundamental parameters

    NASA Astrophysics Data System (ADS)

    Meftah, M.; Irbah, A.; Hauchecorne, A.

    2014-08-01

    The accurate determination of the solar photospheric radius has been an important problem in astronomy for many centuries. From the measurements made by the PICARD spacecraft during the transit of Venus in 2012, we obtained a solar radius of 696,156±145 kilometres. This value is consistent with recent measurements carried out atmosphere. This observation leads us to propose a change of the canonical value obtained by Arthur Auwers in 1891. An accurate value for total solar irradiance (TSI) is crucial for the Sun-Earth connection, and represents another solar astrophysical fundamental parameter. Based on measurements collected from different space instruments over the past 35 years, the absolute value of the TSI, representative of a quiet Sun, has gradually decreased from 1,371W.m-2 in 1978 to around 1,362W.m-2 in 2013, mainly due to the radiometers calibration differences. Based on the PICARD data and in agreement with Total Irradiance Monitor measurements, we predicted the TSI input at the top of the Earth's atmosphere at a distance of one astronomical unit (149,597,870 kilometres) from the Sun to be 1,362±2.4W.m-2, which may be proposed as a reference value. To conclude, from the measurements made by the PICARD spacecraft, we obtained a solar photospheric equator-to-pole radius difference value of 5.9±0.5 kilometres. This value is consistent with measurements made by different space instruments, and can be given as a reference value.

  11. 40 CFR 81.413 - Maine.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Environment 18 2014-07-01 2014-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

  12. 40 CFR 81.413 - Maine.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Environment 17 2011-07-01 2011-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

  13. Maine's Employability Skills Program

    ERIC Educational Resources Information Center

    McMahon, John M.; Wolffe, Karen E.; Wolfe, Judy; Brooker, Carrie

    2013-01-01

    This Practice Report describes the development and implementation of the "Maine Employability Skills Program," a model employment program developed by the Maine Division for the Blind and Visually Impaired (DBVI). The program was designed to support the efforts of the chronically unemployed or underemployed. These consumers were either…

  14. Main Memory Caching of Web Documents

    Microsoft Academic Search

    Evangelos P. Markatos

    1996-01-01

    An increasing amount of information is currently becoming available through World Wide Web servers. Document requests to popular Web servers arrive every few tens of milliseconds at peak rate. To reduce the overhead imposed by frequent document requests, we propose the notion of caching a World Wide Web server's documents in its main memory (which we call Main Memory Web

  15. 40 CFR 81.413 - Maine.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Environment 18 2013-07-01 2013-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

  16. 40 CFR 81.413 - Maine.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Environment 18 2012-07-01 2012-07-01 false Maine. 81.413 Section 81.413 Protection of Environment...Federal Areas Where Visibility Is an Important Value § 81.413 Maine. Area name Acreage Public Law establishing...

  17. Fla. Students Turn to Maine for Diplomas

    ERIC Educational Resources Information Center

    Cavanagh, Sean

    2004-01-01

    This article reports on a student option to earn a high school diploma from a Maine private school. Frustrated in their attempts to pass the state graduation test and receive high school diplomas, some Florida students are securing the prized credentials by a different route: a private school in Lewiston, Maine. For many of those students,…

  18. MAINE 1:24,000 HYDROLOGY POLYGONS

    EPA Science Inventory

    The Maine 1:24,000 Hydrology Polygons SDE feature class depicts double line river features, single line streams, pond, lake and coastal outlines in Maine from USGS 1:24,000 scale quadrangles. Some New Hampshire and New Brunswick features are also included. Codes are included to ...

  19. Optics Simulations for the NLC Main Linac

    Microsoft Academic Search

    Woodley; Mark D

    2001-01-01

    Focusing in the NLC main linac will be provided mainly by hybrid permanent magnet quadrupoles which have limited variability in strength. When the energy profile of the linac changes, due to normal cycling of rf sources, mismatches in the beam optics can be generated if the quadrupole strengths are not rescaled to the new energy profile. These mismatches can lead

  20. Optics simulations for the NLC main linac

    Microsoft Academic Search

    M. Woodley; P. Tenenbaum; L. Hendrickson; A. Seryi

    2001-01-01

    Focusing in the NLC main linac will be provided mainly by hybrid permanent magnet quadrupoles which have limited variability in strength. When the energy profile of the linac changes, due to normal cycling of RF sources, mismatches in the beam optics can be generated if the quadrupole strengths are not rescaled to the new energy profile. These mismatches can lead

  1. The Legal Rights of Maine Women.

    ERIC Educational Resources Information Center

    Potter, Judy R.; Marshall, Gail

    This booklet is intended to help Maine women recognize and enforce their rights under Maine and federal law. It is not designed to be a substitute for lawyers' services, but to inform women of their legal rights so that they will know when to consult a lawyer or a governmental agency for assistance in enforcing these rights. Organized topically by…

  2. Threats to Piping Plovers in Maine

    Microsoft Academic Search

    Kyle Hutton

    2010-01-01

    Piping plovers are a shoreline bird found along the Atlantic coast. In the State of Maine, Plover populations are listed as endangered due to stressors like the development and human traffic that accompany the recreational use of beaches. The Maine Audubon Society is taking up efforts to protect piping plovers by setting up exclosures and erecting fence and twine on

  3. Off-Reservation Indian Survey [Maine].

    ERIC Educational Resources Information Center

    Sockabasin, Allen J., Comp; Stone, John G., Comp.

    The needs of the off-reservation Indian population in Maine and recommendations for the correction of these needs are discussed. The program's objectives were (1) to determine the present level of services available to off-reservation Indians in Maine, (2) to determine present housing standards, educational levels, health programs, and geographic…

  4. Rotational mixing in tidally locked massive main-sequence binaries

    E-print Network

    S. E. de Mink; M. Cantiello; N. Langer; O. R. Pols

    2008-11-24

    One of the main uncertainties in evolutionary calculations of massive stars is the efficiency of internal mixing. It changes the chemical profile inside the star and can therefore affect the structure and further evolution. We demonstrate that eclipsing binaries, in which the tides synchronize the rotation period of the stars and the orbital period, constitute a potentially strong test for the efficiency of rotational mixing. We present detailed stellar evolutionary models of massive binaries assuming the composition of the Small Magellanic Cloud. In these models we find enhancements in the surface nitrogen abundance of up to 0.6 dex.

  5. Editing the Main Template in Contribute -1 -Editing the Main Template in Contribute

    E-print Network

    Hill, Jeffrey E.

    Editing the Main Template in Contribute - 1 - Editing the Main Template in Contribute Overview The main page template and secondary template have different formatting and as such there are different tutorials to demonstrate editing of each. The purpose of this tutorial is to show how the main page can

  6. Maine Studiesumaine.edu/mainestudies An Interdisciplinary Minor that Focuses on the Study of Maine

    E-print Network

    Thomas, Andrew

    Maine Studiesumaine.edu/mainestudies An Interdisciplinary Minor that Focuses on the Study of Maine Interdisciplinary Core Courses: · MES 101- Introduction to Maine Studies (one section online, one section on site at UMaine), satisfies one or more general education requirements (gen ed). · MES 201 - The Maine Coast

  7. SODAR application for estimating boundary layer parameters

    Microsoft Academic Search

    Annalisa Capanni; Giovanni Gualtieri

    An application of Doppler SODAR technique has been made in order to evaluate the main atmospheric variables affecting the boundary layer structure in a plain terrain. Besides directly monitoring such meteorological variables as wind profiles, the application of a number of methods and algorithms enabled the estimation of features such as atmospheric turbulence, Monin-Obukhov length, friction velocity and PBL depth,

  8. The biological affects: a typology.

    PubMed

    Buck, R

    1999-04-01

    This typology of biological affects is based on developmental-interactionist theory of motivation, emotion, and cognition. Affects--subjectively experienced feelings and desires--involve interoceptive perceptual systems based on primordial molecules that characterize neurochemicals. Biological affects involve primary motivational-emotional systems (primes) associated with hierarchically organized neurochemical systems in the brain, including subcortical (reptilian) and paleocortical (limbic) brain structures. Affects fulfill individualistic (selfish) functions (arousal, approach-avoidance, agonistic) and prosocial (cooperative) functions. Selfish and cooperative functions are associated respectively with the right and left hemispheres. Biological affects constitute the physiological bases for higher level affects: social affects (e.g., pride, guilt, shame, pity, jealousy), cognitive affects (e.g., curiosity, surprise), and moral affects. PMID:10378015

  9. Performance parameters in the design of flight motion simulators

    NASA Astrophysics Data System (ADS)

    Mitchell, Robert W.

    2012-06-01

    The desired test performance parameters influence the design of a Flight Motion Simulator (FMS) and affect its size, weight, power, electro-magnetic interference, noise, and vibration. A common desire is to specify requirements beyond the immediate need for future test programs. This may directly affect cost and schedule. Critical parameters that affect the FMS design are larger payload sizes, higher accuracies, and higher dynamic requirements. This paper provides a checklist of parameters and specification tradeoffs to be considered for the overall system performance requirements.

  10. Affective Incoherence: When Affective Concepts and Embodied Reactions Clash

    PubMed Central

    Centerbar, David B.; Clore, Gerald L.; Schnall, Simone; Garvin, Erika

    2008-01-01

    In five studies, we examined the effects on cognitive performance of coherence and incoherence between conceptual and experiential sources of affective information. The studies crossed the priming of happy and sad concepts with affective experiences. In different experiments, these included: approach or avoidance actions, happy or sad feelings, and happy or sad expressive behaviors. In all studies, coherence between affective concepts and affective experiences led to better recall of a story than affective incoherence. We suggested that the experience of such experiential affective cues serves as evidence of the appropriateness of affective concepts that come to mind. The results suggest that affective coherence has epistemic benefits, and that incoherence is costly, for cognitive performance. PMID:18361672

  11. Genetic Status of Atlantic Salmon in Maine

    NSDL National Science Digital Library

    National Research Council. Committee on Atlantic Salmon in Maine.

    This interim report from the National Research Council's (NRC) Committee on Atlantic Salmon in Maine is a prepublication of the March 2002 report provided by National Academy Press. The once abundant populations of Atlantic Salmon in Maine have declined in recent years, now listed as endangered. The NRC Committee believes that "understanding the genetic makeup of Maine's salmon is important for recovery efforts." This 48-page report includes information on the salmon's biology, evolution, genetics, its current state, and the committee's conclusions. It can be viewed online or downloaded for printing.

  12. [Medical simulation as a professional tool which affect the safety of the patient used in the learning process].

    PubMed

    Czekajlo, Michael; D?browski, Marek; D?browska, Agata; Torres, Kamil; Torres, Anna; Witt, Magdalena; G?siorowski, ?ukasz; Szuka?a, Magdalena

    2015-06-22

    Simulation is the methodology of teaching, learning process using educational equipment from simple simulators, designed to study individual tasks, through advanced mannequins called human patient stimulators faithfully mimic the human and its parameters. The medical simulation's main task is education and improvement patients' safety. Advanced human simulators can realistically cough, vomit with artificial chyme and bleed with artificial blood causing a real stress of medical personnel and the need for immediate action. Medical simulation gives the opportunity to prepare medical personnel to the profession more effectively, in less time than traditional education and also clearly affects the patients' safety. PMID:26098659

  13. All-Stokes Parameterization of the Main Beam and First Sidelobe for the Arecibo Radio Telescope

    Microsoft Academic Search

    Carl Heiles; Phil Perillat; Michael Nolan; Duncan Lorimer; Ramesh Bhat; Tapasi Ghosh; Ellen Howell; Murray Lewis; Karen O'Neil; Chris Salter; Snezana Stanimirovic

    2001-01-01

    Radio astronomical measurements of extended emission require knowledge of the beam shape and response because the measurements need correction for quantities such as beam efficiency and beamwidth. We describe a scheme that characterizes the main beam and sidelobe in all Stokes parameters employing parameters that allow reconstruction of the complete beam patterns and, also, afford an easy way to see

  14. Variation of wave directional spread parameters along the Indian coast

    Microsoft Academic Search

    V. Sanil Kumar

    2006-01-01

    Directional spreading of wave energy is popularly modeled with the help of the Cosine Power model and it mainly depends on the spreading parameter. This paper describes the variation of the spreading parameter estimated based on the wave data collected at four locations along the East as well as the West side of the Indian coast. The directional spreading parameter

  15. Teaching Case: Maine Turnpike Toll Discounts

    NSDL National Science Digital Library

    Ann Velenchik

    This is a very short case about a coupon experiment on the Maine Turnpike that can be used very early in Micro Principles courses to motivate the introduction of demand curves, elasticity and externalities that comes later in the course.

  16. Maine Geological Survey: Online Educational Materials

    NSDL National Science Digital Library

    2009-12-08

    The Maine Geological Survey (MGS) has crafted a fine set of materials for those interested in learning more about the state's natural history via virtual tours, lesson plans, and maps. First up is the Virtual Tour of Maine Geology, which includes photographs of bedrock geology, geologic hazards, mineral collecting, and surficial geology. The Lesson Plans area contains 51 lessons, including "Igneous Rock Identification" and "Composition of Topsoil." A number of MGS maps are available online in the Maps and Publications area. The site includes a Bibliography of Maine Geology, which contains over 12,000 references. Additionally, the site contains a link to the MGS publications page, which has official state of Maine wall maps available for purchase.

  17. Maine Geological Survey: Online Educational Materials

    NSDL National Science Digital Library

    The Maine Geological Survey (MGS) has crafted a fine set of materials for those interested in learning more about the state's natural history via virtual tours, lesson plans, and maps. First up is the Virtual Tour of Maine Geology, which includes photographs of bedrock geology, geologic hazards, mineral collecting, and surficial geology. The Lesson Plans area contains 51 lessons, including "Igneous Rock Identification" and "Composition of Topsoil." A number of MGS maps are available online in the Maps and Publications area. The site includes a Bibliography of Maine Geology, which contains over 12,000 references. Additionally, the site contains a link to the MGS publications page, which has official state of Maine wall maps available for purchase.

  18. The main characteristics of web art

    Microsoft Academic Search

    Peng Gang; Zhou Shaobin

    2010-01-01

    The main characteristics of web art include distance interaction, the containerization of media art expression, the publicity of media art communication, tactile experience of media art engagement and the virtual reality of media sociology.

  19. Space Shuttle Main Engine Test Firing

    NASA Technical Reports Server (NTRS)

    1988-01-01

    A cloud of extremely hot steam boils out of the flame deflector at the A-1 test stand during a test firing of a Space Shuttle Main Engine (SSME) at the John C. Stennis Space Center, Hancock County, Mississippi.

  20. Main Idea: What is the Book About?

    NSDL National Science Digital Library

    ReadWorks

    2012-03-26

    In this resource, students will identify and describe what a book is mainly about using the title, text and pictures. The two featured texts that students will use are informational texts about tigers and ladybugs.

  1. The Art of Facility Stewardship in Maine.

    ERIC Educational Resources Information Center

    Adams, Matt

    2000-01-01

    Reviews the facility stewardship of each of the seven state universities belonging to the University System of Maine. Focus is on successful and often creative facility management when confronted with limited budgets. (GR)

  2. Using Pictures to Support the Main Idea

    NSDL National Science Digital Library

    ReadWorks

    2012-03-26

    In this resource, students will identify pictures that describe what the book is mainly about. Throughout the teacher modeling section, guided practice, and independent practice, students will use books on tigers, farm animals, and whales.

  3. 30 CFR 57.6160 - Main facilities.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...least 200 feet from work places or shafts; (5) At least 50 feet from electric substations; (6) A safe distance from trolley wires; and (7) At least 25 feet from detonator storage facilities. (b) Main facilities used to store explosive...

  4. 30 CFR 57.6160 - Main facilities.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...least 200 feet from work places or shafts; (5) At least 50 feet from electric substations; (6) A safe distance from trolley wires; and (7) At least 25 feet from detonator storage facilities. (b) Main facilities used to store explosive...

  5. Flavor ofmaine 4 Maine Sardine Pizza

    E-print Network

    Sardines Golden Brown Sardine Appetizers 15 Planked Maine Sardines Open Face Sardine Sandwich 16 Maine\\esllC!,!; herran, for a Ion ume an brush "CltS or tr~ps They someumes used orches 10 lure 'he fuh 1n10 ne s and gear ~re eonsanu)' belO developed for ellher dlJurne or na illUme hsl>1D The lra.dl Jonal method. of ha

  6. Food Habits of Bald Eagles in Maine

    Microsoft Academic Search

    C. S. Todd; L. S. Young; R. B. Owen; F. J. Gramlich

    2008-01-01

    Abstract: Food remains,were,collected at 78 different bald eagle (Haliaeetus leucocephalus) breeding and wintering areas in Maine during 1976-80. Nearly 1,400 prey individuals were identified. Fish com- prised 79% of the food items collected in interior Maine. Three species, brown bullhead (Ictalurus neb- ulosus),white sucker (Catostomus commersoni), and chain pickerel (Esox niger), were favored foods in freshwater habitats. Birds, primarily gulls

  7. University of Maine School of Marine Sciences

    NSDL National Science Digital Library

    Located in Orono, Maine, the SMS is the largest concentration of marine expertise in Maine, and offers one of the largest research and educational programs in the Northeast. Research activities of faculty and students range from aquaculture, marine biology, marine biotechnology, oceanography, and marine geology, to public policy and marine archeology. Site offers information on graduate and undergraduate programs, current research, school news, upcoming events, and outreach initiatives.

  8. Space shuttle main engine: Hydraulic system

    NASA Technical Reports Server (NTRS)

    Geller, G.; Lamb, C. D.

    1981-01-01

    The hydraulic actuation system of the space shuttle main engine is discussed. The system consists of five electrohydraulic actuators and a single engine filter used to control the five different propellant valves, which in turn control thrust and mixture ratio of the space shuttle main engine. The hydraulic actuation system provides this control with a precision of 98.7 percent or an error in position no greater than 1.3 percent of full scale rotational travel for critical positions.

  9. Amplitudes of stochastically excited oscillations in main-sequence stars

    E-print Network

    G. Houdek; N. J. Balmforth; J. Christensen-Dalsgaard; D. O. Gough

    1999-09-06

    We present estimates of the amplitudes of intrinsically stable stochastically excited radial oscillations in stars near the main sequence. The amplitudes are determined by the balance between acoustical energy generation by turbulent convection (the Lighthill mechanism) and linear damping. Convection is treated with a time-dependent, nonlocal, mixing-length model, which includes both convective heat flux and turbulent pressure in both the equilibrium model and the pulsations. Velocity and luminosity amplitudes are computed for stars with masses between 0.9 M_\\sun and 2.0 M_\\sun in the vicinity of the main sequence, for various metallicities and convection parameters. As in previous studies, the amplitudes are found to increase with stellar mass, and therefore with luminosity. Amongst those stars that are pulsationally stable, the largest amplitudes are predicted for a 1.6 M_\\sun model of spectral type F2; the values are approximately 15 times larger than those measured in the Sun.

  10. Amplitudes of stochastically excited oscillations in main-sequence stars

    E-print Network

    Houdek, G; Christensen-Dalsgaard, J; Gough, D O

    1999-01-01

    We present estimates of the amplitudes of intrinsically stable stochastically excited radial oscillations in stars near the main sequence. The amplitudes are determined by the balance between acoustical energy generation by turbulent convection (the Lighthill mechanism) and linear damping. Convection is treated with a time-dependent, nonlocal, mixing-length model, which includes both convective heat flux and turbulent pressure in both the equilibrium model and the pulsations. Velocity and luminosity amplitudes are computed for stars with masses between 0.9 M_\\sun and 2.0 M_\\sun in the vicinity of the main sequence, for various metallicities and convection parameters. As in previous studies, the amplitudes are found to increase with stellar mass, and therefore with luminosity. Amongst those stars that are pulsationally stable, the largest amplitudes are predicted for a 1.6 M_\\sun model of spectral type F2; the values are approximately 15 times larger than those measured in the Sun.

  11. Effect of acquisition parameters on image quality in digital tomosynthesis

    NASA Astrophysics Data System (ADS)

    Deller, Timothy; Jabri, Kadri N.; Sabol, John M.; Ni, Xianfeng; Avinash, Gopal; Saunders, Rowland; Uppaluri, Renuka

    2007-03-01

    Digital tomosynthesis (DTS) is emerging as an advanced imaging technique that enables volumetric slice imaging with a detector typically used for projection radiography. An understanding of the interactions between DTS acquisition parameters and characteristics of the reconstructed slice images is required for optimizing the acquisition protocols of various clinical applications. This paper presents our investigation of the effects and interactions of acquisition parameters, including sweep angle, number of projections, and dose, on clinically relevant image-quality metrics. Metrics included the image characteristics of in-slice resolution, depth resolution, image noise level, and presence of ripple. Phantom experiments were performed to characterize the relationship between the acquisition parameters and image quality. Results showed that the depth resolution was mainly dependent on sweep angle. Visibility of ripple was determined by the projection density (number of projections divided by sweep angle), as well as properties of the imaged object. Image noise was primarily dependent on total dose and not significantly affected by the number of projections. These experimental and theoretical results were confirmed using anthropomorphic phantoms and also used to develop clinical acquisition protocols. Assessment of phantom and clinical images obtained with these protocols revealed that the use of acquisition protocols optimized for a given clinical exam enables rapid, low-dose, high quality DTS imaging for diverse clinical applications including abdomen, hand, shoulder, spine, and chest. We conclude that DTS acquisition parameters have a significant effect on image quality and should be tailored for the imaged anatomy and desired clinical application. Relationships developed in this work will guide the selection of acquisition protocols to improve image quality and clinical utility of DTS for a wide variety of clinical exams.

  12. Affective Productions of Mathematical Experience

    ERIC Educational Resources Information Center

    Walshaw, Margaret; Brown, Tony

    2012-01-01

    In underscoring the affective elements of mathematics experience, we work with contemporary readings of the work of Spinoza on the politics of affect, to understand what is included in the cognitive repertoire of the Subject. We draw on those resources to tell a pedagogical tale about the relation between cognition and affect in settings of…

  13. On Parameter Selection in Cold Spraying

    NASA Astrophysics Data System (ADS)

    Assadi, H.; Schmidt, T.; Richter, H.; Kliemann, J.-O.; Binder, K.; Gärtner, F.; Klassen, T.; Kreye, H.

    2011-12-01

    For cold spraying, a method for the construction of the window of deposition and the selection of optimum process parameters is presented. Initially, particle impact velocity and the critical particle velocity for bonding are worked out and expressed explicitly in terms of key process and material parameters. Subsequently, the influence of particle velocity on coating characteristics is examined in view of the results of experiments and simulations. It has been found that main coating characteristics can be described as a unique function of the ratio of particle velocity to critical velocity, here referred to as ?. Finally, coating properties are linked directly to primary process parameters via parameter selection maps, where contours of constant ? are plotted on a plane of gas temperature versus gas pressure. Inferences of the presented method and the resulting parameter selection maps are discussed for the example of copper as feedstock material.

  14. The influence of some parameters on the tube-support interaction

    SciTech Connect

    Ciorneiu, B. [Inst. of Solid Mechanics, Bucharest (Romania). Dept. of Structural Dynamics

    1996-12-01

    The problem studied in this paper is imposed by the necessity of increasing the reliability of heat exchangers. As known, the flow in the tubular bank can cause fretting-wear and impact mechanism at the tube-support interface, which finally can result in failure of the tube. This type of failure can occur, for example, in the steam generator tubes in nuclear power plants. One of the objectives of this study is to see how some parameters such as the equivalent contact stiffness and the radial clearance, affect the interaction between the tube and the baffle-support. On the basis of numerical simulation of the impact it is possible to draw same conclusions regarding the possibilities for reduction of the contact force which is one of the main parameters in the fretting-wear.

  15. 125. Pre1911. Crew on main deck, starboard side at main ...

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

    125. Pre-1911. Crew on main deck, starboard side at main hatch, looking aft. Note dark object in center of photo that may be original main deck capstan. Fred Heick collection. (K9.9571) - Ship BALCLUTHA, 2905 Hyde Street Pier, San Francisco, San Francisco County, CA

  16. Maine's College Graduates: Where They Go and Why. Finding Maine's Future Workforce (Revisited)

    ERIC Educational Resources Information Center

    Silvernail, David L.; Woodard, Brianne L.

    2006-01-01

    In the knowledge-based economy of today, training and retaining a college educated workforce is crucial to the vitality of Maine. Approximately one-half of Maine's high school graduates who go on to college leave the State to do so. A previous study, "Maine's College Graduates: Where They Go and Why" (2003), looked at the factors that influenced…

  17. 1 The Main Asteroid Belt Carolyn Crow: NASA's Dawn Mission The Main Asteroid Belt

    E-print Network

    Waliser, Duane E.

    1 The Main Asteroid Belt Carolyn Crow: NASA's Dawn Mission The Main Asteroid Belt Written to the main asteroid belt to visit two of the largest protoplanets, Vesta and Ceres. Using sunlight, a mere accomplished by a spacecraft before. What compelled astronomers to send Dawn to the asteroid belt and what does

  18. Fermilab Main Injector Beam Position Monitor Upgrade

    SciTech Connect

    Banerjee, B.; Barker, W.; Bledsoe, S.; Boes, T.; Briegel, C.; Capista, D.; Deuerling, G.; Dysert, R.; Forster, R.; Foulkes, S.; Haynes, W.; Hendricks, B.; Kasza, T.; Kutschke, R.; Marchionni, A.; Olson, M.; Pavlicek, V.; Piccoli, L.; Prieto, P.; Rapisarda, S.; Saewert, A.; /Fermilab

    2006-05-01

    An upgrade of the Beam Position Monitor (BPM) signal processing and data acquisition system for the Fermilab Main Injector is described. The Main Injector is a fast cycling synchrotron that accelerates protons or antiprotons from 8 to 150 GeV. Each Main Injector cycle can have a totally different magnet ramp, RF frequency configuration, beam bunch structure, and injection/extraction pattern from the previous cycle. The new BPM system provides the capabilities and flexibility required by the dynamic and complex machine operations. The system offers measurement capability in the 2.5 MHz and 53 MHz channels to detect the range of bunch structures for protons and antiprotons in both wideband (turn-by-turn) and narrowband (closed-orbit) modes. The new BPM read-out system is based on the digital receiver concept and is highly configurable, allowing the signal processing of nearly all Main Injector beam conditions, including the detection of individual batches. An overview of the BPM system in the Main Injector operating environment, some technology details and first beam measurements are presented.

  19. Does methamphetamine affect bone metabolism?

    PubMed

    Tomita, Masafumi; Katsuyama, Hironobu; Watanabe, Yoko; Okuyama, Toshiko; Fushimi, Shigeko; Ishikawa, Takaki; Nata, Masayuki; Miyamoto, Osamu

    2014-05-01

    There is a close relationship between the central nervous system activity and bone metabolism. Therefore, methamphetamine (METH), which stimulates the central nervous system, is expected to affect bone turnover. The aim of this study was to investigate the role of METH in bone metabolism. Mice were divided into 3 groups, the control group receiving saline injections, and the 5 and 10mg/kg METH groups (n=6 in each group). All groups received an injection of saline or METH every other day for 8 weeks. Bone mineral density (BMD) was assessed by X-ray computed tomography. We examined biochemical markers and histomorphometric changes in the second cancellous bone of the left femoral distal end. The animals that were administered 5mg/kg METH showed an increased locomotor activity, whereas those receiving 10mg/kg displayed an abnormal and stereotyped behavior. Serum calcium and phosphorus concentrations were normal compared to the controls, whereas the serum protein concentration was lower in the METH groups. BMD was unchanged in all groups. Bone formation markers such as alkaline phosphatase and osteocalcin significantly increased in the 5mg/kg METH group, but not in the 10mg/kg METH group. In contrast, bone resorption markers such as C-terminal telopeptides of type I collagen and tartrate-resistant acid phosphatase 5b did not change in any of the METH groups. Histomorphometric analyses were consistent with the biochemical markers data. A significant increase in osteoblasts, especially in type III osteoblasts, was observed in the 5mg/kg METH group, whereas other parameters of bone resorption and mineralization remained unchanged. These results indicate that bone remodeling in this group was unbalanced. In contrast, in the 10mg/kg METH group, some parameters of bone formation were significantly or slightly decreased, suggesting a low turnover metabolism. Taken together, our results suggest that METH had distinct dose-dependent effects on bone turnover and that METH might induce adverse effects, leading to osteoporosis. PMID:24582730

  20. Marine Occupations Conference (Southern Maine Vocational Technical Institute, South Portland, Maine, April 5, 1974). Maine Sea Grant Bulletin 9.

    ERIC Educational Resources Information Center

    Coggins, Phyllis, Ed.; And Others

    This collection of speeches, presented as the 1974 Marine Occupations Conference in South Portland, Maine, provides an overview of information regarding availability and kinds of careers in, as well as the educational requirements for, marine occupations. Also reviewed are the problems of developing marine resources, such as those involving…

  1. Measuring skin reflectance parameters

    Microsoft Academic Search

    Matthew P. Dickens; William A. P. Smith; Hossein Ragheb; Edwin R. Hancock

    2008-01-01

    This paper addresses the problem of determining skin reflectance parameters, and studies their stability and discriminating power for different individuals. Our study uses radiance data captured by a Cyberware 3030 range scanner. We analyse the data using a layered reflectance model based on the Beckmann-Kirchhoff wave scattering model. The parameters of this model are the thickness of the skin layers,

  2. Active Estimation of Object Dynamics Parameters with Tactile Sensors 

    E-print Network

    Saal, Hannes; Ting, Jo-Anne; Vijayakumar, Sethu

    2010-01-01

    The estimation of parameters that affect the dynamics of objects—such as viscosity or internal degrees of freedom—is an important step in autonomous and dexterous robotic manipulation of objects. However, accurate and ...

  3. Density of states and order parameter in dirty anisotropic superconductors 

    E-print Network

    Pokrovsky, SV; Pokrovsky, Valery L.

    1996-01-01

    We analyze in detail how the scattering by nonmagnetic impurities affects the shape and amplitude of the order parameter (OF) and the density of states in anisotropic superconductors in the framework of BCS theory. Special ...

  4. Impacts of Some Building Design Parameters on Heat Pump Applications 

    E-print Network

    Erdim, B.; Manioglu, G.

    2011-01-01

    as providing the climatic comfort conditions and minimum energy consumption during the construction and use of the building. Building form is one of the important design parameters affecting the heating and cooling energy consumption in the building...

  5. Multiple-coincidence of flood waves on the main river and its tributaries

    NASA Astrophysics Data System (ADS)

    Prohaska, S.; Ilic, A.; Majkic, B.

    2008-11-01

    This paper addresses the definition of multiple coincidences of flood waves on the main river and its tributaries. Contrary to previous studies of partial coincidences of various flood parameters (Prohaska 1999) for the main river and one of its tributaries, this procedure allows for the definition of complex (multiple) coincidences of a single parameter for the main river and several of its tributaries. In particular, coincidence is defined for the major parameter which characterizes a flood (i.e., the flood wave volume). The paper gives a practical example of the analysis of simultaneous flood waves on the Danube and its main tributaries in Serbia: the Tisa and the Sava rivers. The procedure for potential use of the established coincidence functions in applied water management and forecasting is also described in the paper.

  6. MODELING PHYSICAL HABITAT PARAMETERS

    EPA Science Inventory

    Salmonid populations can be affected by alterations in stream physical habitat. Fish productivity is determined by the stream's physical habitat structure ( channel form, substrate distribution, riparian vegetation), water quality, flow regime and inputs from the watershed (sedim...

  7. Factors affecting the morphology of benzoyl peroxide microsponges.

    PubMed

    Nokhodchi, Ali; Jelvehgari, Mitra; Siahi, M Reza; Mozafari, M Reza

    2007-01-01

    Benzoyl peroxide (BPO) is primarily used in the treatment of mild to moderate acne. However, its application is associated with skin irritation. It has been shown that encapsulation and controlled release of BPO could reduce the side effect while also reducing percutaneous absorption when administered to the skin. The aim of the present investigation was to design and formulate an appropriate encapsulated form of BPO, using microsponge technology, and explore the parameters affecting the morphology and other characteristics of the resultant products employing scanning electron microscopy (SEM). Benzoyl peroxide particles were prepared using an emulsion solvent diffusion method by adding an organic internal phase containing benzoyl peroxide, ethyl cellulose and dichloromethane into a stirred aqueous phase containing polyvinyl alcohol (PVA). Different concentrations of BPO microsponges were incorporated in lotion formulations and the drug release from these formulations were studied. The SEM micrographs of the BPO microsponges enabled measurement of their size and showed that they were spherical and porous. Results showed that the morphology and particle size of microsponges were affected by drug:polymer ratio, stirring rate and the amount of emulsifier used. The results obtained also showed that an increase in the ratio of drug:polymer resulted in a reduction in the release rate of BPO from the microsponges. The release data showed that the highest and the lowest release rates were obtained from lotions containing plain BPO particles and BPO microsponges with the drug:polymer ratio of 13:1, respectively. The kinetics of release study showed that the release data followed Peppas model and the main mechanism of drug release from BPO microsponges was diffusion. PMID:17692528

  8. All-Stokes Parameterization of the Main Beam and First Sidelobe for the Arecibo Radio Telescope

    E-print Network

    Carl Heiles; Phil Perillat; Michael Nolan; Duncan Lorimer; Ramesh Bhat; Tapasi Ghosh; Ellen Howell; Murray Lewis; Karen O'Neil; Chris Salter; Snezana Stanimirovic

    2001-07-18

    We describe a scheme that characterizes the main beam and sidelobe in all Stokes parameters employing parameters that allow reconstruction of the complete beam patterns and, also, afford an easy way to see how the beam changes with azimuth, zenith angle, and time. For the main beam in Stokes I the parameters include the beam width, ellipticity and its orientation, coma and its orientation, the point-source gain, the integrated gain (or, equivalently, the main beam efficiency); for the other Stokes parameters the beam parameters include beam squint and beam squash. For the first sidelobe ring in Stokes I the parameters include an 8-term Fourier series describing the height, radius, and radial width; for the other Stokes parameters they include only the sidelobe's fractional polarization. We illustrate the technique by applying it to the Arecibo telescope. The main beam width is smaller and the sidelobe levels higher than for a uniformly-illuminated aperture of the same effective area. These effects are modeled modestly well by a blocked aperture, with the blocked area equal to about 10% of the effective area (this corresponds to 5% physical blockage). In polarized emission, the effects of beam squint (difference in pointing direction between orthogonal polarizations) and squash (difference in beamwidth between orthogonal polarizations) do not correspond to theoretical expectation and are higher than expected; these effects are almost certainly caused by the blockage. The first sidelobe is highly polarized because of blockage.

  9. All-Stokes Parameterization of the Main Beam and First Sidelobe for the Arecibo Radio Telescope

    E-print Network

    Heiles, C; Nolan, M L; Lorimer, D; Bhat, R; Ghosh, T K; Howell, E; Lewis, M; O'Neil, K; Salter, C; Stanimirovic, S; Heiles, Carl; Perillat, Phil; Nolan, Michael; Lorimer, Duncan; Bhat, Ramesh; Ghosh, Tapasi; Howell, Ellen; Lewis, Murray; Neil, Karen O'; Salter, Chris; Stanimirovic, Snezana

    2001-01-01

    We describe a scheme that characterizes the main beam and sidelobe in all Stokes parameters employing parameters that allow reconstruction of the complete beam patterns and, also, afford an easy way to see how the beam changes with azimuth, zenith angle, and time. For the main beam in Stokes I the parameters include the beam width, ellipticity and its orientation, coma and its orientation, the point-source gain, the integrated gain (or, equivalently, the main beam efficiency); for the other Stokes parameters the beam parameters include beam squint and beam squash. For the first sidelobe ring in Stokes I the parameters include an 8-term Fourier series describing the height, radius, and radial width; for the other Stokes parameters they include only the sidelobe's fractional polarization. We illustrate the technique by applying it to the Arecibo telescope. The main beam width is smaller and the sidelobe levels higher than for a uniformly-illuminated aperture of the same effective area. These effects are modeled...

  10. Space shuttle main engine computed tomography applications

    NASA Technical Reports Server (NTRS)

    Sporny, Richard F.

    1990-01-01

    For the past two years the potential applications of computed tomography to the fabrication and overhaul of the Space Shuttle Main Engine were evaluated. Application tests were performed at various government and manufacturer facilities with equipment produced by four different manufacturers. The hardware scanned varied in size and complexity from a small temperature sensor and turbine blades to an assembled heat exchanger and main injector oxidizer inlet manifold. The evaluation of capabilities included the ability to identify and locate internal flaws, measure the depth of surface cracks, measure wall thickness, compare manifold design contours to actual part contours, perform automatic dimensional inspections, generate 3D computer models of actual parts, and image the relationship of the details in a complex assembly. The capabilities evaluated, with the exception of measuring the depth of surface flaws, demonstrated the existing and potential ability to perform many beneficial Space Shuttle Main Engine applications.

  11. Blue Stragglers After the Main Sequence

    E-print Network

    Alison Sills; Amanda Karakas; John Lattanzio

    2008-11-18

    We study the post-main sequence evolution of products of collisions between main sequence stars (blue stragglers), with particular interest paid to the horizontal branch and asymptotic giant branch phases. We found that the blue straggler progeny populate the colour-magnitude diagram slightly blueward of the red giant branch and between 0.2 and 1 magnitudes brighter than the horizontal branch. We also found that the lifetimes of collision products on the horizontal branch is consistent with the numbers of so-called "evolved blue straggler stars" (E-BSS) identified by various authors in a number of globular clusters, and is almost independent of mass or initial composition profile. The observed ratio of the number of E-BSS to blue stragglers points to a main sequence lifetime for blue stragglers of approximately 1-2 Gyr on average.

  12. Asteroseismology of pre-main sequence stars

    NASA Astrophysics Data System (ADS)

    Zwintz, K.; Guenther, D. B.; Kallinger, T.

    2009-03-01

    Intermediate-mass pre-main sequence (PMS) stars cross the instability region on their way to the main sequence and can become pulsationally unstable. The ? Scuti-like PMS pulsators populate the same area in the Hertzsprung-Russell (HR) diagram as the classical ? Scuti stars. But the interiors of PMS stars differ from those of their more evolved (post-)main sequence counterparts resulting in different pulsation frequency spectra. Asteroseismology of PMS p-mode pulsators has only recently become possible. The latest investigation focused on the analysis of MOST space photometry of the Herbig Ae star HD 142666 finding 12 pulsational frequencies lying on top of larger irregular variability caused by a circumstellar disk.

  13. Least Bittern nesting record in Maine

    USGS Publications Warehouse

    Wilson, Paul U.; Longcore, Jerry R.

    2011-01-01

    In June 2001, we located an active Ixobrychus exilis (Least Bittern) nest in Bass Harbor marsh on Mount Desert Island, Hancock County, ME. Only 2 other descriptions of Least Bittern nests exist for Maine, although based on other breeding evidence, the species is known to breed elsewhere in the state. We found the nest in a 0.7-ha Typha sp. (cattail)-dominated area within a larger (3.5 ha) freshwater wetland located ?120 m from an 88-ha estuary. During the breeding season, most Least Bitterns in Maine and elsewhere are found in wetlands of greater size, usually >10 ha.

  14. [Risk factors of main cancer sites].

    PubMed

    Uleckiene, Saule; Didziapetriene, Janina; Grici?te, Liudvika Laima; Urbeliene, Janina; Kasiulevicius, Vytautas; Sapoka, Virginijus

    2008-01-01

    Cancer prevention is a system of various measures devoted to avoid this disease. Primary cancer prevention means the identification, avoidance, or destruction of known risk factors. The main risk factors are smoking, diet, alcohol consumption, occupational factors, environmental pollution, electromagnetic radiation, infection, medicines, reproductive hormones, and lack of physical activity. Approximately one-third of cancers can be avoided by implementing various preventive measures. The aim of this article was to acquaint medical students, family doctors with risk factors of main cancer sites (lung, breast, colorectal, and prostate). PMID:19142058

  15. Gulf of Maine Research Institute: Atlantic Herring

    NSDL National Science Digital Library

    Created by the Gulf of Maine Research Institute, this website offers several interesting perspectives on a very important fish in the food chain -- the Atlantic Herring (_Clupea harengus_). The website organizes information about the Atlantic Herring into three main categories: Biology; Harvest and Processing; and Research. The site utilizes beautiful photos, illustrations, and maps as it briefly describes herring life cycle, distribution, spawning research, mid-water trawling, processing, and much more. The website also provides a solid collection of herring resources and references.

  16. Bunch coalescing in the Fermilab Main Ring

    SciTech Connect

    Wildman, D.; Martin, P.; Meisner, K.; Miller, H.W.

    1987-03-01

    A new rf system has been installed in the Fermilab Main Ring to coalesce up to 13 individual bunches of protons or antiprotons into a single high-intensity bunch. The coalescing process consists of adiabatically reducing the h = 1113 Main Ring rf voltage from 1 MV to less than 1 kV, capturing the debunched beam in a linearized h = 53 and h = 106 bucket, rotating for a quarter of a synchrotron oscillation period, and then recapturing the beam in a single h = 1113 bucket. The new system will be described and the results of recent coalescing experiments will be compared with computer-generated particle tracking simulations.

  17. RESEARCH NOTE : Inversion for multiple parameter classes

    NASA Astrophysics Data System (ADS)

    Kennett, B. L. N.; Sambridge, M.

    1998-10-01

    Many geophysical data, such as the frequencies of the free oscillations of the Earth, depend on more than one type of model parameter. For inverse problems depending on multiple parameter classes, an iterative solution procedure is introduced in which each parameter class can be treated in the same way. This approach has considerable advantages where a large number of parameters are employed, but can still be useful for smaller systems. The iteration by parameter class commences by solving for the direct dependence on a particular parameter class, and at subsequent iterations the cross-dependences between classes are introduced. The update affects only the right-hand side of the equations, and, because the same sets of equations have to be solved at each iteration, an efficient computational implementation can be made. The largest set of equations that has to be solved at a time corresponds to the number of variables in an individual parameter class rather than the full set of parameters, which confers substantial computational benefits for very large problems.

  18. The fossilized size distribution of the main asteroid belt

    NASA Astrophysics Data System (ADS)

    Bottke, William F.; Durda, Daniel D.; Nesvorný, David; Jedicke, Robert; Morbidelli, Alessandro; Vokrouhlický, David; Levison, Hal

    2005-05-01

    Planet formation models suggest the primordial main belt experienced a short but intense period of collisional evolution shortly after the formation of planetary embryos. This period is believed to have lasted until Jupiter reached its full size, when dynamical processes (e.g., sweeping resonances, excitation via planetary embryos) ejected most planetesimals from the main belt zone. The few planetesimals left behind continued to undergo comminution at a reduced rate until the present day. We investigated how this scenario affects the main belt size distribution over Solar System history using a collisional evolution model (CoEM) that accounts for these events. CoEM does not explicitly include results from dynamical models, but instead treats the unknown size of the primordial main belt and the nature/timing of its dynamical depletion using innovative but approximate methods. Model constraints were provided by the observed size frequency distribution of the asteroid belt, the observed population of asteroid families, the cratered surface of differentiated Asteroid (4) Vesta, and the relatively constant crater production rate of the Earth and Moon over the last 3 Gyr. Using CoEM, we solved for both the shape of the initial main belt size distribution after accretion and the asteroid disruption scaling law QD?. In contrast to previous efforts, we find our derived QD? function is very similar to results produced by numerical hydrocode simulations of asteroid impacts. Our best fit results suggest the asteroid belt experienced as much comminution over its early history as it has since it reached its low-mass state approximately 3.9-4.5 Ga. These results suggest the main belt's wavy-shaped size-frequency distribution is a "fossil" from this violent early epoch. We find that most diameter D?120 km asteroids are primordial, with their physical properties likely determined during the accretion epoch. Conversely, most smaller asteroids are byproducts of fragmentation events. The observed changes in the asteroid spin rate and lightcurve distributions near D˜100-120 km are likely to be a byproduct of this difference. Estimates based on our results imply the primordial main belt population (in the form of D<1000 km bodies) was 150-250 times larger than it is today, in agreement with recent dynamical simulations.

  19. Independent Falls are the main reason

    E-print Network

    de Lijser, Peter

    Greater Los Angeles Healthcare System Division of VA Desert Pacific Healthcare Network Fall Prevention AngelesVA Geriatric Research Education Clinical Center and affiliates and is a validated fall risk selfStay Independent Falls are the main reason why older people lose their independence. Are you

  20. Maine State Plan for Environmental Education.

    ERIC Educational Resources Information Center

    Maine State Dept. of Educational and Cultural Services, Augusta.

    Outlined is a proposed statewide environmental education program for Maine. The program intends to prepare citizens to identify environmental problems, to evaluate solutions to the problems, and to work toward their solution. The program will be implemented at several levels of education: formal preschool, elementary, and secondary education;…

  1. Salazar, Collins: Economic Benefits for Maine

    USGS Multimedia Gallery

    Secretary of the Interior Ken Salazar looks at plans for $8.3 million in projects at Acadia National Park funded under President Obama's economic recovery package that will bring jobs and economic growth to Maine. Left to right are Alan Goldstein, President of the Board of Directors for Acadia Partn...

  2. Semantic Web research main streams, popular falacies,

    E-print Network

    van Harmelen, Frank

    Semantic Web research anno 2006: main streams, popular falacies, current status, future challenges Frank van Harmelen Vrije Universiteit Amsterdam #12;2 This is NOT a Semantic Web evangelization talk (I of the day, of temporary interest" #12;Which Semantic Web are we talking about? Semantic Web research anno

  3. Maine KIDS COUNT 2002 Data Book.

    ERIC Educational Resources Information Center

    Maine Children's Alliance, Augusta.

    This KIDS COUNT data book details statewide trends in the well-being of Maine's children. Following a brief overview of the data book and a summary of indicators, state trend data are presented in the areas of: (1) poverty; (2) child and adolescent suicide; (3) public high school dropouts; (4) teen pregnancy; (5) public high school graduates…

  4. Maine Kids Count 1998 Data Book.

    ERIC Educational Resources Information Center

    Maine Children's Alliance, Augusta.

    This Kids Count report details statewide trends in the well-being of Maine's children. The statistical portrait is based on indicators of children's well-being in four areas: (1) physical and mental health; (2) community and family environment; (3) social and economic opportunity; and (4) education and learning. The report's introduction describes…

  5. Maine Kids Count 2003 Data Book.

    ERIC Educational Resources Information Center

    Jelcich, Susan, Ed.

    This Kids Count data book details statewide trends in the well-being of Maine's children. The statistical portrait is based on indicators in the areas of physical and mental health, including insurance enrollment, adolescent health and safety, and child welfare; social and economic status, including poverty, unemployment, and teen pregnancies; and…

  6. Main Entrance Medical College of Wisconsin

    E-print Network

    to the 2nd floor and exit left Directions to the Medical College of WI Office of Technology DevelopmentMain Entrance 2nd Floor Medical College of Wisconsin Lobby 1st Floor Take elevators to the 2nd Floor Elevator #1 Elevator #2 Elevator #1 Elevator #2 Carpet Ends Office of Technology Development (OTD

  7. Eutrophication in the Gulf of Maine's waters

    EPA Science Inventory

    The Gulf of Maine and its watershed encompass more than 170,000 km2 and is home to over 6.5 million Canadians and Americans. Despite its long-standing importance to fisheries and natural resources and current interest in exploration of wind and tide as renewable energy sources, ...

  8. Aneurysm of main left coronary artery.

    PubMed Central

    Kessler, M; Hamby, R I; Hilsenrath, J

    1980-01-01

    A 57-year-old man presented with exertional chest pain, and was found to have a saccular, lobulated aneurysm of the left main coronary artery associated with severe atherosclerotic vascular disease. This is the third similar case reported and the first case of atherosclerotic origin. All symptoms were relieved by coronary artery bypass surgery. Images PMID:7426179

  9. High Moisture Corn Evaluated for Northern Maine

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Profitable rotation crops that can grow in cool, northern Maine climates are needed to sustain the diversity of potato systems. A field experiment was conducted to determine whether three high moisture corn hybrids were suitable for harvest as a short season rotation crop. Yield and grain moisture...

  10. State Teacher Policy Yearbook, 2009. Maine

    ERIC Educational Resources Information Center

    National Council on Teacher Quality, 2009

    2009-01-01

    This Maine edition of the National Council on Teacher Quality's (NCTQ's) 2009 "State Teacher Policy Yearbook" is the third annual look at state policies impacting the teaching profession. It is hoped that this report will help focus attention on areas where state policymakers can make changes that will have a positive impact on teacher quality and…

  11. Subgroup Achievement and Gap Trends: Maine

    ERIC Educational Resources Information Center

    Center on Education Policy, 2010

    2010-01-01

    In grade 8 (the only grade in which subgroup trends were analyzed by achievement level), Maine students had across-the-board gains. There were improvements in both reading and math at the basic, proficient and advanced levels for the subgroups large enough to count, which were white students, low income students, and boys and girls. Results on…

  12. Maine Kids Count 1999 Data Book.

    ERIC Educational Resources Information Center

    Maine Children's Alliance, Augusta.

    This Kids Count Report details statewide trends in the well-being of Maine's children, with particular focus on child health care access. The statistical portrait is based on a variety of indicators in five areas: (1) child health care access; (2) physical and mental health; (3) community and family environment; (4) social and economic…

  13. La Sculpture Virtuelle porte de main

    E-print Network

    Boyer, Edmond

    La Sculpture Virtuelle à portée de main Adeline Pihuit, Paul Kry, Marie-Paule Cani But : Proposer à l'utilisateur novice un système simple et naturel de sculpture virtuelle Motivations - Complexité des logiciels de modélisation 3D actuels - Intérêt de la sculpture virtuelle : Imiter la sculpture

  14. Semantic Web Research anno 2006: main streams,

    E-print Network

    van Harmelen, Frank

    Semantic Web Research anno 2006: main streams, popular fallacies, current status and future. In this topical1 paper we try to give an analysis and overview of the current state of Semantic Web research. We point to different in- terpretations of the Semantic Web as the reason underlying many contro- versies

  15. Maine-Niles Association of Special Recreation.

    ERIC Educational Resources Information Center

    Iowa Univ., Iowa City. Recreation Education Program.

    Presented are duplications of the responses given by Maine-Niles Association of Special Recreation (Skokie, Illinois) as part of a project to collect, share, and compile information about, and techniques in the operation of 18 community action models for recreation services to the disabled. Model programs are categorized as consumer, client…

  16. Kennebec: A Portfolio of Maine Writing

    NSDL National Science Digital Library

    Maine has produced some tremendous writers, and the University of Maine at Augusta has been working diligently to provide a set of online resources related to these artists and their writings. Part of this work includes the project to digitize the literary journal "Kennebec". The journal was first published in 1977 under the direction of faculty and students of the University of Maine, along with assistance and support from citizens in the Kennebec community. Interestingly enough, the first issue sets out a grand plan to move the capitol of Augusta to a type of "Brasilia" in the western hills of Maine. It's a grand start, and each issues contains poetry, non-fiction pieces, and other items. Visitors can scan through the issues as they see fit, or they can also use the index file which lists each piece of writing and its location within the pdf file. In the first issue, visitors should definitely check out "Three Immortals", which is a series of poems about the jazz greats Lester Young, Bud Powell, and Charlie Parker.

  17. Space transportation main engine reliability and safety

    NASA Technical Reports Server (NTRS)

    Monk, Jan C.

    1991-01-01

    Viewgraphs are used to illustrate the reliability engineering and aerospace safety of the Space Transportation Main Engine (STME). A technology developed is called Total Quality Management (TQM). The goal is to develop a robust design. Reducing process variability produces a product with improved reliability and safety. Some engine system design characteristics are identified which improves reliability.

  18. Main Entrances Free City Bus Stops

    E-print Network

    Magee, Derek

    (permit holders only)P Visitor car parking only. Visitors must display a visitor parking permit)P Visitor car parking only. Visitors must display a visitor parking permit in their car, which they can B Main Entrances Free City Bus Stops Controlled parking areas (permit holders only)P Visitor car

  19. Trade of Main Wild Berries in Finland

    Microsoft Academic Search

    Kari Kangas

    The price trends and markets of the main wild berries, bilberry ( Vaccinium myrtillus L.) and lingonberry (Vaccinium vitis-idaea L.), were analysed in this study, which covered both domestic use of berries, imports and exports. The periods considered were for bilberries from 1988 to 1997 and for lingonberries from 1979 to 1994. The results indicated that both exports and imports

  20. 76 FR 59177 - Maine Disaster #ME-00029

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-23

    ...disaster for Public Assistance Only for the State of Maine (FEMA-4032- DR), dated 09/13/2011. Incident: Tropical Storm Irene. Incident Period: 08/27/2011 through 08/29/2011. Effective Date: 09/13/2011. Physical Loan...

  1. Salazar, Collins: Economic Benefits for Maine

    USGS Multimedia Gallery

    Secretary Salazar and Senator Collins visited with some of the leaders of Maine's four tribes. They met at the College of the Atlantic. From left to right: Lt. Governor Joseph Socobasin, Passamaquoddy Tribe at Indian Township, Micmac Chief Victoria Higgins, Secretary Salazar, Senator Collins, Tribal...

  2. Maine Project against Bullying. Final Report.

    ERIC Educational Resources Information Center

    Saufler, Chuck; Gagne, Cyndi

    Noting that bullying among primary school-age children has become recognized as an antecedent to more violent behavior in later grades, the 3-year Maine Project Against Bullying examined currently available research on bullying and evaluated books, curricula, media materials, and programs to identify resources and strategies which can be applied…

  3. Status of J-PARC Main Ring

    NASA Astrophysics Data System (ADS)

    Koseki, Tadashi

    2008-02-01

    The J-PARC (Japan Proton Accelerator Research Complex) facility is under construction as a joint project of KEK and JAEA. In this paper, we present a construction status of slow cycling main ring synchrotron (MR) of J-PARC. Performance test and installation of accelerator components are now in progress. Beam commissioning is scheduled to start in May 2008.

  4. Live insertion method used for main renewal

    SciTech Connect

    Solkowitz, M. (Gas Supply Dept., Baltimore Gas and Electric Co., Baltimore, MD (US))

    1992-04-01

    Baltimore Gas and Electric's pilot project using the live insertion method to replace a cast iron main provided excellent results. Its use on Eastern Avenue, a major state highway, was cost effective, provided gas service to customers during the work, required relatively short construction time and resulted in only minor traffic disruptions. Gas service transfers to the new main were done at customer convenience and resulted in outages of only a few hours per customer. This paper reports that the project involved inserting a 6-in. plastic line inside an existing 10-in. cast iron main. Miller Pipeline Corp., Indianapolis, supplier of the Insertec {l angle}R{r angle} live insertion method was contracted for the job. Miller technicians assisted BG and E forces by providing a load analysis of the main, a pushing machine and related supplies, foaming equipment and pipe cutting tools. Company forces were responsible for all preparatory work, including opening all excavations, installing bypasses, and fusing and testing the plastic pipe. Service transfers and renewals were also completed by company employees.

  5. 2011 Holiday Take Home Menu Main Courses

    E-print Network

    Mathis, Wayne N.

    Items Corn Bread _____ Blue ½ Sheet Pan $14.00 Serves 6-8 _____ Yellow ½ Sheet Pan $14.00 Serves 6 with Natural Pan Jius Serves 6-8 people Hot Side Dishes Roasted Rutabaga, Grilled Leeks Tender Roasted Rutabaga Choice 1 Main Dish, 2 Large Side Items, 1 Dessert & 1 corn bread All orders must to be received

  6. Harvest Efficiency of Bloodworms on Maine Mudflats

    Microsoft Academic Search

    Eben Sypitkowski; William G. Ambrose Jr; Curtis Bohlen; Joseph Warren

    2008-01-01

    Efficiency of diggers of varying experience levels in harvesting bloodworms Glycera dibranchiata was documented during multiple tides on several intertidal flats in midcoast Maine. Individually coded-wire-tagged bloodworms were seeded in 20-m plots and harvested by professional diggers after allowing ample time for bloodworms to burrow. To ensure that bloodworms reached depths similar to those of naturally occurring individuals, we measured

  7. Maine Technical College System Annual Report, 1996.

    ERIC Educational Resources Information Center

    Fitzsimmons, John

    Focusing on the 1995-96 academic year, this report discusses programs and outcomes for the seven colleges in the Maine Technical College System (MTCS). Following a message from the System President, general outcomes for the MTCS are described. This section indicates that systemwide enrollment in fall 1995 was 4,475, representing a 24% increase…

  8. Library Locations Locations other than Main Library

    E-print Network

    Library Locations Locations other than Main Library Example: Feminist Studies HQ1410 .U54 2009 Andelson Collection: 2 South, Ethnic & Gender Studies Library (EGSL) Annex: Off campus storage. See www.library.ucsb.edu/depts/access/annex.html Arts Library: 1st Floor, Music Building Asian American Studies: 2 South, Ethnic & Gender Studies

  9. Library Locations Locations other than Main Library

    E-print Network

    Library Locations Locations other than Main Library Example: Feminist Studies HQ1410 .U54 2009 University of California, Santa Barbara Library www.library.ucsb.edu Updated 3-2014 A - B.......................................6 Central M - N..................................................Arts Library (Music Building) P

  10. Parameter estimating state reconstruction

    NASA Technical Reports Server (NTRS)

    George, E. B.

    1976-01-01

    Parameter estimation is considered for systems whose entire state cannot be measured. Linear observers are designed to recover the unmeasured states to a sufficient accuracy to permit the estimation process. There are three distinct dynamics that must be accommodated in the system design: the dynamics of the plant, the dynamics of the observer, and the system updating of the parameter estimation. The latter two are designed to minimize interaction of the involved systems. These techniques are extended to weakly nonlinear systems. The application to a simulation of a space shuttle POGO system test is of particular interest. A nonlinear simulation of the system is developed, observers designed, and the parameters estimated.

  11. Positive affect and psychobiological processes.

    PubMed

    Dockray, Samantha; Steptoe, Andrew

    2010-09-01

    Positive affect has been associated with favourable health outcomes, and it is likely that several biological processes mediate the effects of positive mood on physical health. There is converging evidence that positive affect activates the neuroendocrine, autonomic and immune systems in distinct and functionally meaningful ways. Cortisol, both total output and the awakening response, has consistently been shown to be lower among individuals with higher levels of positive affect. The beneficial effects of positive mood on cardiovascular function, including heart rate and blood pressure, and the immune system have also been described. The influence of positive affect on these psychobiological processes is independent of negative affect, suggesting that positive affect may have characteristic biological correlates. The duration and conceptualisation of positive affect may be important considerations in understanding how different biological systems are activated in association with positive affect. The association of positive affect and psychobiological processes has been established, and these biological correlates may be partly responsible for the protective effects of positive affect on health outcomes. PMID:20097225

  12. Thermophysical modeling of main-belt asteroids from WISE data

    NASA Astrophysics Data System (ADS)

    Hanuš, J.; Delbó, M.; Durech, J.; Alí-Lagoa, V.

    2014-07-01

    We determine asteroid physical parameters such as size, surface roughness, albedo, and thermal inertia by applying the implementation of the thermophysical model (TPM) of Lagerros (1996; 1997; 1998) to the thermal data obtained by the NASA WISE satellite. We present thermophysical parameters for ˜150 asteroids, which gives us so far the largest sample of asteroids with determined values of thermal inertia. On several individual cases, we discuss the reliability of our determinations and limitations of the TPM method we use. As initial shapes, we adopt convex shape models from the DAMIT database (Durech et al., 2010) and present new determinations based on combined dense and sparse-in-time disk-integrated photometry and the lightcurve inversion method (Kaasalainen & Torppa 2001; Kaasalainen et al., 2001). We use thermal data from the WISE filters W3 and W4, as well as the data observed by the IRAS satellite. However, due to the intriguing accuracy of the fluxes and larger amount of measurements, the WISE data are significantly more important and dominate the modeling. The WISE data are processed the same way as in Alí-Lagoa et al. (2014) for asteroid (341 843) 2008 EV_5. We show the main results of the study of derived thermophysical parameters within the whole population of MBAs and within several asteroid families with the main focus on the thermal inertia. The thermal inertia increases with decreasing size (as previously shown by Delbó et al., 2007), but a large range of thermal inertia values is observed within the similar size ranges between D˜10-100 km. Surprisingly, we derived very low (<10 J m^{-2} s^{-1/2} K^{-1}) thermal inertias for many asteroids (˜20) with various sizes. The range of thermal inertia values is large even within a few asteroid families.

  13. A photoelectric lightcurve survey of small main belt asteroids

    NASA Technical Reports Server (NTRS)

    Binzel, R. P.; Mulholland, J. D.

    1983-01-01

    A survey to obtain photoelectric lightcurves of small main-belt asteroids was conducted from November 1981 to April 1982 using the 0.91- and 2.1-m telescopes at the University of Texas McDonald Observatory. A total of 18 main-belt asteroids having estimated dimaters under 30 km were observed with over half of these being smaller than 15 km. Rotational periods were determined or estimated from multiple nights of observation for nearly all of these yielding a sample of 17 small main-belt asteroids which is believed to be free of observational selection effects. All but two of these objects were investigated for very short periods in the range of 1 min to 2 hr using power spectrum analysis of a continuous set of integrations. No evidence for such short periods was seen in this sample. Rotationally averaged B(1,0) magnitudes were determined for most of the surveyed asteroids, allowing diameter estimates to be made. Imposing the suspected selection effects of photogaphic photometry on the results of this survey gives excellent agreement with the results from that technique. This shows that the inability of photographic photometry to obtain results for many asteroids is indeed due to the rotational parameter of those asteroids.

  14. Brushless Motor Parameter Optimization

    E-print Network

    Ruina, Andy L.

    ~ 1 ~ Brushless Motor Parameter Optimization Report Spring 2011 May 6, 2011 Alicia Violeta Juarez Crow ECE 2012 1439 Kentfield Ave. Apt. 2 Redwood City, CA 94061 (650)3957846 avj22 ........................................................................................................................ 7 A. Motor

  15. Parameter Modelling of Gears

    Microsoft Academic Search

    Isad Šari'c; Nedžad Rep?i'c; Adil Muminovi'c

    2010-01-01

    In this paper, the results of the research of three-dimensional (3D) parameter modelling of different types of standard catalogue gears using CATIA V5 software system. Gears modelling by computers are based on geometric and perspective transformation which is not more detail examined in the paper because of their large scope. Parameter modelling application makes possible the control of created 3D

  16. Visualization of Parameter Space for Image Analysis

    PubMed Central

    Pretorius, A. Johannes; Bray, Mark-Anthony P.; Carpenter, Anne E.; Ruddle, Roy A.

    2013-01-01

    Image analysis algorithms are often highly parameterized and much human input is needed to optimize parameter settings. This incurs a time cost of up to several days. We analyze and characterize the conventional parameter optimization process for image analysis and formulate user requirements. With this as input, we propose a change in paradigm by optimizing parameters based on parameter sampling and interactive visual exploration. To save time and reduce memory load, users are only involved in the first step - initialization of sampling - and the last step - visual analysis of output. This helps users to more thoroughly explore the parameter space and produce higher quality results. We describe a custom sampling plug-in we developed for CellProfiler - a popular biomedical image analysis framework. Our main focus is the development of an interactive visualization technique that enables users to analyze the relationships between sampled input parameters and corresponding output. We implemented this in a prototype called Paramorama. It provides users with a visual overview of parameters and their sampled values. User-defined areas of interest are presented in a structured way that includes image-based output and a novel layout algorithm. To find optimal parameter settings, users can tag high- and low-quality results to refine their search. We include two case studies to illustrate the utility of this approach. PMID:22034361

  17. Physical Parameter Eclipse Mapping

    NASA Astrophysics Data System (ADS)

    Vrielmann, Sonja; Horne, Keith; Hessman, Frederic V.

    1999-07-01

    We present a new Eclipse Mapping method for reconstructing the properties of accretion discs in eclipsing catatclysmic variables. Physical Parameter Eclipse Mapping reconstructs spatially resolved maps of physical parameters such as temperatures and surface densities by fitting observed eclipse light curves at several wavelengths with the aid of a model describing the dependence of the disc spectrum on the physical parameters. Physical Parameter Eclipse Mapping has clear advantages over a classical approach for many applications. Most importantly, all of the available spectrophotometric data can be fitted simultaneously. The only drawback is the assumption of a physical model prior to the reconstructions. However, the method is very flexible in the choice of the spectral model, since the method itself does not depend on the choice. Furthermore, physical considerations, observations and experience will help determine the model to be used. The analysis with synthetic data shows that reliable parameter distributions can be obtained if the reconstruction behaviour of the model used is well understood. This means that the reconstructions are only as good as the model allows. In ambiguous parameter regions the method can (by definition) not give us the correct answer. However, in ambiguous-free zones, we show that the method indeed gives us the correct answer.

  18. Inhomogeneity parameter in designing an ion trap

    E-print Network

    Weikang Fan

    2015-01-08

    In designing an ion trap, geometry and rf source should be optimized such that the trap depth is maximized while the ion remain stable. In a quadrupole linear trap, stable parameters $a$ and $q$ are utilized frequently in describing the stability. However, in a surface trap, the trap have to be mapped to the linear quadrupole trap so that $a$ and $q$ can be evaluated. This work explains how to handle them for surface trap designing and how the geometry and rf source affect it. We conclude that the $q$ parameter should be 0.2~0.22 so that the trap is stable.

  19. Affective incoherence: when affective concepts and embodied reactions clash

    Microsoft Academic Search

    David B. Centerbar; Simone Schnall; Gerald L. Clore; Erika D. Garvin

    2008-01-01

    In five studies, the authors examined the effects on cognitive performance of coherence and incoherence between conceptual and experiential sources of affective information. The studies crossed the priming of happy and sad concepts with affective experiences. In different experiments, these included approach or avoidance actions, happy or sad feelings, and happy or sad expressive behaviors. In all studies, coherence between

  20. Parameters Describing Earth Observing Remote Sensing Systems

    NASA Technical Reports Server (NTRS)

    Zanoni, Vicki; Ryan, Robert E.; Pagnutti, Mary; Davis, Bruce; Markham, Brian; Storey, Jim

    2003-01-01

    The Earth science community needs to generate consistent and standard definitions for spatial, spectral, radiometric, and geometric properties describing passive electro-optical Earth observing sensors and their products. The parameters used to describe sensors and to describe their products are often confused. In some cases, parameters for a sensor and for its products are identical; in other cases, these parameters vary widely. Sensor parameters are bound by the fundamental performance of a system, while product parameters describe what is available to the end user. Products are often resampled, edge sharpened, pan-sharpened, or compressed, and can differ drastically from the intrinsic data acquired by the sensor. Because detailed sensor performance information may not be readily available to an international science community, standardization of product parameters is of primary performance. Spatial product parameters described include Modulation Transfer Function (MTF), point spread function, line spread function, edge response, stray light, edge sharpening, aliasing, ringing, and compression effects. Spectral product parameters discussed include full width half maximum, ripple, slope edge, and out-of-band rejection. Radiometric product properties discussed include relative and absolute radiometry, noise equivalent spectral radiance, noise equivalent temperature diffenence, and signal-to-noise ratio. Geometric product properties discussed include geopositional accuracy expressed as CE90, LE90, and root mean square error. Correlated properties discussed include such parameters as band-to-band registration, which is both a spectral and a spatial property. In addition, the proliferation of staring and pushbroom sensor architectures requires new parameters to describe artifacts that are different from traditional cross-track system artifacts. A better understanding of how various system parameters affect product performance is also needed to better ascertain the utility of existing datasets and products as well as to specify the performance of new sensors and products. Examples of simulations performed for the Landsat Data Continuity Mission illustrate how various parameters affect system and product performance. Specific examples include the effects of ground sample distance, MTF, and band-to-band registration on various products.

  1. Seismic stability assessment for FBR main vessels

    SciTech Connect

    Matsuura, Shinichi; Hagiwara, Yutaka; Nakamura, Hideharu [Central Research Inst. of Electric Power Industry, Chiba (Japan); Kawamoto, Yoji [Mitsubishi Heavy Industries, Ltd., Nagasaki (Japan); Murakami, Toshiaki [Toshiba Corp., Kawasaki (Japan); Nakagawa, Masaki [Hitachi, Ltd., Ibaraki (Japan); Ogiso, Seitaro [Kawasaki Heavy Industries, Ltd., Tokyo (Japan); Akiyama, Hiroshi; Ohtsubo, Hideomi [Univ. of Tokyo (Japan)

    1995-12-31

    Buckling under earthquake loading is one of the most important problems for thin-walled structures such as FBR main vessels. Therefore, Central Research Institute of Electric Power Industry (CRIEPI, Japan), commissioned by the Ministry of International Trade and Industry of the Japanese Government, has carried out the demonstration test and research program of buckling of FBR. The objectives of this paper is to describe the results of static and dynamic buckling tests and numerical analyses of cylindrical shells under horizontal loads, and to present a seismic stability assessment method for FBR main vessels. Shear-bending buckling strength evaluation formulae and response reduction factors due to nonlinearity in pre-buckling stage are worth special mention.

  2. IPEM: An Interval-parameter Energy Systems Planning Model

    Microsoft Academic Search

    Q. G. Lin; G. H. Huang

    2008-01-01

    Energy systems planning models are specifically developed for effective planning of energy activities in a regional, national, or global context. However, the planning process is fraught with uncertainties that may affect the effectiveness of the planning. In this study, an interval-parameter linear programming approach is introduced to develop an interval-parameter energy systems model (IPEM) for supporting effective regional energy systems

  3. The Maine coastal current: spring climatological circulation

    Microsoft Academic Search

    Daniel R. Lynch; Monica J. Holboke; Christopher E. Naimie

    1997-01-01

    Computational results are presented for the climatological circulation in the Gulf of Maine, with special emphasis on its coastal current in the periods March-April and May-June. The simulations use a 3-D prognostic Finite Element model. The computational domain includes the entire Gulf plus adjacent waters, with a higher resolution coastal domain nested within. A series of six bimonthly Gulf-wide simulations

  4. Main Memory Database Systems: An Overview

    Microsoft Academic Search

    Hector Garcia-molina; Kenneth Salem

    1992-01-01

    Abstract-Memory resident database systems (MMDB’s) store their data,in main physical memory and provide very high-speed access. Conventional database systems are optimized for the particular,characteristics,of disk,storage,mechanisms.,Memory resident systems, on the other hand, use different optimizations to structure and organize data, as well as to make it reliable. This paper,surveys,the major memory residence optimizations and briefly discusses some of the memory resident

  5. Neurological disorders presenting mainly in adolescence

    PubMed Central

    Macleod, S; Appleton, R E

    2007-01-01

    The aim of this review is to discuss some of the neurological diseases that present mainly in the adolescent period. The article focuses on the usual presentation and course of the more common, and some uncommon, epilepsies, neuromuscular disorders, neurodegenerative disorders, inflammatory disorders of the central nervous system and some other, miscellaneous conditions. The article ends with a very brief and general discussion about management issues in this age group. PMID:17264287

  6. Three Main Subsystems: I. Centerpiece (Linear Actuation)

    E-print Network

    Provancher, William

    Systems Two Main Subsystems: I. Solar Panels Four 100 W high efficiency solar panels were installed symmetrically atop the canopy. The panels were wired in parallel to a deep cycle solar battery. In full sunlight- Monocrystalline-Solar-Panel-4-Pack-GS-S-250- Fab5x4/202960000?N=8p9Z5yc1v Left Bottom: Wind Blue Power LLC. (2014

  7. Maine Geological Survey Borehole Temperature Profiles

    DOE Data Explorer

    Marvinney, Robert

    This dataset includes temperature profiles from 30 boreholes throughout Maine that were selected for their depth, location, and lithologies encountered. Depths range from about 300 feet to 2,200 feet. Most of the boreholes selected for measurement were completed in granite because this lithology can be assumed to be nearly homogeneous over the depth of the borehole. Boreholes were also selected to address gaps in existing geothermal datasets. Temperature profiles were collected in October and November, 2012.

  8. Maine Geological Survey Borehole Temperature Profiles

    SciTech Connect

    Marvinney, Robert

    2013-11-06

    This dataset includes temperature profiles from 30 boreholes throughout Maine that were selected for their depth, location, and lithologies encountered. Depths range from about 300 feet to 2,200 feet. Most of the boreholes selected for measurement were completed in granite because this lithology can be assumed to be nearly homogeneous over the depth of the borehole. Boreholes were also selected to address gaps in existing geothermal datasets. Temperature profiles were collected in October and November, 2012.

  9. Coronary anomalies: left main coronary artery aneurysm.

    PubMed

    Varda, Rajsekhar; Chitimilla, Santosh Kumar; Lalani, Aslam

    2012-01-01

    Coronary artery aneurysm is one of the rarest anomalies that we see in our medical practice and they are mostly associated with obstructive lesions due to atherosclerotic changes. Management of these aneurysm patients (conservative or surgical repair) usually depends on obstructive lesions and associated symptoms. We are presenting a case of left main aneurysm measuring around 14 × 28?mm with other obstructive leisons. It was treated with surgical repair in view of obstructive lesions and symptoms. PMID:24860680

  10. Apollo 15 mission main parachute failure

    NASA Technical Reports Server (NTRS)

    1971-01-01

    The failure of one of the three main parachutes of the Apollo 15 spacecraft was investigated by studying malfunctions in the forward heat shield, broken riser, and firing the fuel expelled from the command module reaction control system. It is concluded that the most probable cause was the burning of raw fuel being expelled during the latter portion of depletion firing. Recommended corrective actions are included.

  11. Absolute parameters of young stars: GG Lup and ?1 Sco

    NASA Astrophysics Data System (ADS)

    Budding, E.; Butland, R.; Blackford, M.

    2015-04-01

    New high-resolution spectroscopy and BVR photometry, together with literature data, on the Gould's Belt close binary systems GG Lup and ?1 Sco are presented and analysed. In the case of GG Lup, light and radial velocity curve fittings confirm a near-main-sequence picture of a pair of close stars. Absolute parameters are found, to within a few per cent, thus: M1 = 4.16 ± 0.12, M2 = 2.64 ± 0.12 (M?); R1 = 2.42 ± 0.05, R2 = 1.79 ± 0.04 (R?); T1 ˜ 13 000, T2 ˜ 10 600 (K); photometric distance ˜160 (pc). The high eccentricity and relatively short period (105 yr) of apsidal revolution may be related to an apparent `slow B-type pulsator' oscillation. Disturbances of the outer envelope of at least one of the components then compromise comparisons to standard evolutionary models, at least regarding the age of the system. A rate of apsidal advance is derived, which allows a check on the mean internal structure constant overline{k_2} = 0.0058 ± 0.0004. This is in agreement with values recently derived for young stars of solar composition and mass ˜3 M?. For ?1 Sco, we agree with previous authors that the secondary component is considerably oversized for its mass, implying binary (interactive) stellar evolution, probably of the `Case A' type. The primary appears relatively little affected by this evolution, however. Its parameters show consistency with a star of its derived mass at age about 13 Myr, consistent with the star's membership of the Sco-Cen OB2 Association. The absolute parameters are as follows: M1 = 8.3 ± 1.0, M2 = 4.6 ± 1.0 (M?); R1 = 3.9 ± 0.3, R2 = 4.6 ± 0.4 (R?); T1 ˜ 24 000, T2 ˜ 17 000 (K); photometric distance ˜135 (pc).

  12. PSS Parameters Tuning Using Genetic Algorithm

    NASA Astrophysics Data System (ADS)

    Abdulrahim, M.; Almoula, Zakaria Fadl; Al-Hafid, Hafid

    2008-10-01

    Optimal tuning of power system stabilizer (PSS) parameters using genetic algorithm with single objective function is presented in this paper. A Single Machine Infinite Bus (SMIB) system is considered. The main objective of this research paper is to investigate the suitability of genetic algorithm for effective tuning of parameters of the power system stabilizer in a single machine infinite bus system. A conventional speed based lead-lag PSS is used. A simple and effective method of tuning the parameters of PSS is proposed which is posed as an optimization formulation by maximizing the damping of modes of oscillations of the SMIB system over a wide range of loading conditions and different system configurations. It is found that GA based PSS with single objective design shows improved dynamic performance over Conventional PSS over a wide range of operating conditions and different system parameters.

  13. Parameter Estimation Through Ignorance

    E-print Network

    Du, Hailiang

    2015-01-01

    Dynamical modelling lies at the heart of our understanding of physical systems. Its role in science is deeper than mere operational forecasting, in that it allows us to evaluate the adequacy of the mathematical structure of our models. Despite the importance of model parameters, there is no general method of parameter estimation outside linear systems. A new relatively simple method of parameter estimation for nonlinear systems is presented, based on variations in the accuracy of probability forecasts. It is illustrated on the Logistic Map, the Henon Map and the 12-D Lorenz96 flow, and its ability to outperform linear least squares in these systems is explored at various noise levels and sampling rates. As expected, it is more effective when the forecast error distributions are non-Gaussian. The new method selects parameter values by minimizing a proper, local skill score for continuous probability forecasts as a function of the parameter values. This new approach is easier to implement in practice than alter...

  14. Analysis of Earthquake Clustering in Parameter Space

    NASA Astrophysics Data System (ADS)

    Lasocki, S.; Karakostas, V. G.

    2008-12-01

    The seismic event is described by a number of parameters whose values determine its location in a multidimensional parameter space. Studies of earthquake clustering involve an analysis of distances between the events. When such studies are to be done in the space constructed by any selected set of parameters they meet the essential problem of different scales of the parameters. To solve this problem with the measure of distance we make use of the property of probability distributions of random variables that the cumulative distribution function transforms the random variable of any distribution into the random variable of uniform distribution in [0,1] interval. The cumulative distribution functions of all parameters under study are estimated from parameter values of a set of earthquake by means of the non-parametric, kernel estimator. This transformation of values of parameters of events into values of their respective cumulative distributions equalizes all dimensions is such a way that the distance between points is Euclidean. The data for reconstructing the cumulative distributions can be any relevant for the investigated problem, i.e. a long event series that includes subseries under study, a series preceding the studied subseries, a background seismicity data etc. We apply this approach to analyze seismicity preceding Mw6.5 Kozani-Grevena (Greece) earthquake from 13/05/1995. The considered parameterizations are the interevent time, interevent distance, epicentral distance to the main shock and magnitude. The analysis in moving time windows reveals appearance of anomalous patterns of smaller events in the time - distance subspaces. Some four years before the main shock a simultaneous shortening of the interevent time and interevent distance becomes distinct. The anomalous patterns are less visible when magnitude complements the parameter space. This work was prepared within the framework of the research project No. PBS-Grecja/10/2007, financed by the Ministry of Education and Science of Poland during the period 2007 to 2009.

  15. Maine Sea Grant Undergraduate Scholarship in Marine Sciences The Maine Sea Grant College Program at the University of Maine is pleased to

    E-print Network

    Thomas, Andrew

    Maine Sea Grant Undergraduate Scholarship in Marine Sciences The Maine Sea Grant College Program at the University of Maine is pleased to announce the second annual Maine Sea Grant Undergraduate Scholarship in Marine Sciences. In the spring semester of each academic year, Maine Sea Grant awards one scholarship

  16. Affect and Graphing Calculator Use

    ERIC Educational Resources Information Center

    McCulloch, Allison W.

    2011-01-01

    This article reports on a qualitative study of six high school calculus students designed to build an understanding about the affect associated with graphing calculator use in independent situations. DeBellis and Goldin's (2006) framework for affect as a representational system was used as a lens through which to understand the ways in which…

  17. Factors Affecting Willingness to Mentor

    ERIC Educational Resources Information Center

    Ghislieri, Chiara; Gatti, Paola; Quaglino, Gian Piero

    2009-01-01

    The paper presents a survey among 300 employees in Northern Italy to assess the willingness to mentor and identify the factors that affect it. Men and respondents with previous mentoring experience indicate a higher willingness to be a mentor. Willingness is affected by personal characteristics that are perceived as necessary for a mentor and the…

  18. The framework of product affection

    Microsoft Academic Search

    J. Q. Mao; Y. H. Zhou; H. B. Yang

    2009-01-01

    This paper introduces a conceptual framework for the process underlying emotional responses that result from the perception of products. The framework distinguishes different kinds of product affection on the basis of emotional psychology. Accordingly, the product affection is divided into three levels: the reflection emotional level, the basic emotional level, the emotional senior level. By revealing the characteristics of the

  19. [Emotions and affect in psychoanalysisis].

    PubMed

    Carton, Solange; Widlöcher, Daniel

    2012-06-01

    The goal of this paper is to give some indications on the concept of affect in psychoanalysis. There is no single theory of affect, and Freud gave successive definitions, which continue to be deepened in contemporary psychoanalysis. We review some steps of Freud works on affect, then we look into some present major questions, such as its relationship to soma, the nature of unconscious affects and the repression of affect, which is particularly developed in the field of psychoanalytic psychosomatic. From Freud's definitions of affect as one of the drive representative and as a limit-concept between the somatic and the psychic, we develop some major theoretical perspectives, which give a central place to soma and drive impulses, and which agree on the major idea that affect is the result of a process. We then note some parallelism between psychoanalysis of affect and psychology and neurosciences of emotion, and underline the gaps and conditions of comparison between these different epistemological approaches. PMID:22713847

  20. Measurement of Family Affective Structure.

    ERIC Educational Resources Information Center

    Lowman, Joseph

    1980-01-01

    Three studies demonstrate that the Inventory of Family Feelings, a measure of family affective structure, has high reliability and construct and concurrent validity. It is appropriate for affective comparisons by age, sex, and ordinal position of children and for measuring change after family or marital therapy, or after predictable stress…

  1. Factors Affecting Informal Economy of Rural Turkey

    NASA Astrophysics Data System (ADS)

    Gonenc, Sertac; Tanrivermis, Harun

    In this study, the informal economy in the rural areas of Turkey has been measured and factors affecting the informal economy have been analyzed. The informal economy has been discussed with regards to three main issues, namely unpaid household labor force usage, own consumption of crop and animal products and informal sales. Although the household labor force is mainly used in farms for agricultural and off-farm activities, the rate of idle labor has been found to be highly significant. It has been found that milk has the largest share of animal produce values consumed by the household, while particularly processed milk products are sold informally and that the consumption and sales values of animal produce processed in the households are required to be added to the unrecorded value calculation. Consumption of crops varies depending on the type of product. The own consumption ratio of crops is affected by the size of the enterprise, the number of individuals in the households and particularly the access to the markets of the enterprises in each region. An average informal value of 6,400.04 USD has been calculated per household, which is higher than the farm income, accounting for 4/5 of total household income. This can be attributed to the fact that the farms are generally small family enterprises with limited market-access opportunities.

  2. Replay of conditioned stimuli during late REM and stage N2 sleep influences affective tone rather than emotional memory strength.

    PubMed

    Rihm, Julia S; Rasch, Björn

    2015-07-01

    Emotional memories are reprocessed during sleep, and it is widely assumed that this reprocessing occurs mainly during rapid eye movement (REM) sleep. In support for this notion, vivid emotional dreams occur mainly during REM sleep, and several studies have reported emotional memory enhancement to be associated with REM sleep or REM sleep-related parameters. However, it is still unknown whether reactivation of emotional memories during REM sleep strengthens emotional memories. Here, we tested whether re-presentation of emotionally learned stimuli during REM sleep enhances emotional memory. In a split-night design, participants underwent Pavlovian conditioning after the first half of the night. Neutral sounds served as conditioned stimuli (CS) and were either paired with a negative odor (CS+) or an odorless vehicle (CS-). During sound replay in subsequent late REM or N2 sleep, half of the CS+ and half of the CS- were presented again. In contrast to our hypothesis, replay during sleep did not affect emotional memory as measured by the differentiation between CS+ and CS- in expectancy, arousal and valence ratings. However, replay unspecifically decreased subjective arousal ratings of both emotional and neutral sounds and increased positive valence ratings also for both CS+ and CS- sounds, respectively. These effects were slightly more pronounced for replay during REM sleep. Our results suggest that re-exposure to previously conditioned stimuli during late sleep does not affect emotional memory strength, but rather influences the affective tone of both emotional and neutral memories. PMID:25933506

  3. Conditions Of Directional Solidification Affect Superalloy

    NASA Technical Reports Server (NTRS)

    Schmidt, D. D.; Alter, W. S.; Hamilton, W. D.; Parr, R. A.

    1992-01-01

    Report describes experiments to determine effects of gradient of temperature and rate of solidification on microstructure and fatigue properties of nickel-based superalloy MAR-M246(Hf). Enhancement of properties extends lifespans of objects, including turbo-pump blades of Space Shuttle Main Engines. Results indicate significant improvements in fatigue properties derived through manipulation of parameters of directional solidification. Particularly MAR-M246(Hf) for turbine blades contains small, well-dispersed blocky carbide and microstructure with small distances between dendrite arms, and without eutectic phase.

  4. Flow, affect and visual creativity.

    PubMed

    Cseh, Genevieve M; Phillips, Louise H; Pearson, David G

    2015-01-01

    Flow (being in the zone) is purported to have positive consequences in terms of affect and performance; however, there is no empirical evidence about these links in visual creativity. Positive affect often--but inconsistently--facilitates creativity, and both may be linked to experiencing flow. This study aimed to determine relationships between these variables within visual creativity. Participants performed the creative mental synthesis task to simulate the creative process. Affect change (pre- vs. post-task) and flow were measured via questionnaires. The creativity of synthesis drawings was rated objectively and subjectively by judges. Findings empirically demonstrate that flow is related to affect improvement during visual creativity. Affect change was linked to productivity and self-rated creativity, but no other objective or subjective performance measures. Flow was unrelated to all external performance measures but was highly correlated with self-rated creativity; flow may therefore motivate perseverance towards eventual excellence rather than provide direct cognitive enhancement. PMID:24820517

  5. Target parameter estimation

    NASA Technical Reports Server (NTRS)

    Hocking, W. K.

    1989-01-01

    The objective of any radar experiment is to determine as much as possible about the entities which scatter the radiation. This review discusses many of the various parameters which can be deduced in a radar experiment, and also critically examines the procedures used to deduce them. Methods for determining the mean wind velocity, the RMS fluctuating velocities, turbulence parameters, and the shapes of the scatterers are considered. Complications with these determinations are discussed. It is seen throughout that a detailed understanding of the shape and cause of the scatterers is important in order to make better determinations of these various quantities. Finally, some other parameters, which are less easily acquired, are considered. For example, it is noted that momentum fluxes due to buoyancy waves and turbulence can be determined, and on occasions radars can be used to determine stratospheric diffusion coefficients and even temperature profiles in the atmosphere.

  6. Castration Depression: Affect, Signal Affect, and/or Depressive Illness?

    PubMed

    Fleischer, Les M

    2015-04-01

    The value of Charles Brenner's ideas regarding depression is assessed, focusing on the significance of castration depressive affect. His discussion of whether depression is an affect, a signal affect, or an illness is examined, with special emphasis on his failure to sufficiently address depression as an illness or disorder as defined by psychiatry. Clinical material from the analysis of a man who suffers from severe depression suggests that incorporating psychiatric concepts (biological and pharmacological) with modern conflict theory can be a useful way to understand and treat some patients with depression. Theoretical and clinical controversies associated with combining psychiatric/biological and psychoanalytic views of depression are examined. PMID:25922375

  7. Phytoplankton in the Gulf of Maine

    NSDL National Science Digital Library

    Phytoplankton, microscopic floating plant-like marine organisms (plankton means wanderer) are at the bottom of the marine food chain. They perform photosynthesis using water, carbon dioxide, and sunlight to produce glucose for their own use, as well as oxygen. Humans and all land animals and sea creatures are dependent on phytoplankton. The chlorophyll in phytoplankton can be observed by remote sensing instruments and is used by scientists as a measure of phytoplankton. In this lesson, students will use satellite data to explore and determine the correlation between sea surface temperature, sunlight, and the amount of chlorophyll (phytoplankton) in the Gulf of Maine at various times of year.

  8. [Iatrogenic damage of the main vessels].

    PubMed

    Shor, N A; Burilov, M V

    2012-02-01

    The results of treatment of 55 patients, suffering iatrogenic damage of the main vessels, which constitute 22.4% of all damages of vessels occurred during last ten years, were analyzed. The causes of the vessels iatrogenic damage were analyzed in detail. A favorable result achievement, a vessel integrity restoration with maintenance of the vascular tube passability have become possible in 50 (90.9%) patients due to early and technically adequate operation conduction. The extremity amputation was performed in 2 (3.6%) patients, 3 (5.5%) patients died. PMID:22629806

  9. Man-induced activities modify demographic parameters in a long-lived species: effects of poisoning and health policies.

    PubMed

    Margalida, Antoni; Colomer, Ma Angels; Oro, Daniel

    2014-04-01

    Recent changes in sanitary policies within the European Union (EU) concerning disposal of carcasses of domestic animals and the increase of non-natural mortality factors, such as illegal poisoning, are threatening European vultures. However, the effects of anthropogenic activities on demographic parameters are poorly studied. Using a long-term study (1994-2011) of the threatened Pyrenean Bearded Vulture Gypaetus barbatus population, we assess the variation in the proportion of breeding pairs, egg-laying dates, clutch size, breeding success, and survival following a sharp reduction in food availability in 2005 due to the application of restrictive sanitary policies decreasing livestock carcass availability. We found a delay in laying dates and a regressive trend in clutch size, breeding success, and survival following policy change. The maintenance of specific supplementary feeding stations for Bearded Vultures probably reduced the negative effects of illegal poisoning and food shortages, which mainly affected subadult survival. A drop in food availability may have produced changes in demographic parameters and an increase in mortality due to an increased exposure to contaminated food. As a result, supplementary feeding as a precautionary measure can be a useful tool to reduce illegal poisoning and declines in demographic parameters until previous food availability scenarios are achieved. This study shows how anthropogenic activities through human health regulations that affect habitat quality can suddenly modify demographic parameters in long-lived species, including those, such as survival, with high sensitivity to population growth rate. PMID:24834731

  10. Skipped Stage Modeling and Testing of the CPAS Main Parachutes

    NASA Technical Reports Server (NTRS)

    Varela, Jose G.; Ray, Eric S.

    2013-01-01

    The Capsule Parachute Assembly System (CPAS) has undergone the transition from modeling a skipped stage event using a simulation that treats a cluster of parachutes as a single composite canopy to the capability of simulating each parachute individually. This capability along with data obtained from skipped stage flight tests has been crucial in modeling the behavior of a skipping canopy as well as the crowding effect on non-skipping ("lagging") neighbors. For the finite mass inflation of CPAS Main parachutes, the cluster is assumed to inflate nominally through the nominal fill time, at which point the skipping parachute continues inflating. This sub-phase modeling method was used to reconstruct three flight tests involving skipped stages. Best fit inflation parameters were determined for both the skipping and lagging canopies.

  11. Effective length measurements of prototype Main Injector Dipole endpacks

    SciTech Connect

    Glass, H.D.; Brown, B.C.; Harding, D.J.

    1993-03-03

    An endpack design has been developed for the Fermilab Main Injector Dipole. A major part of the design process was the testing of a series of prototype removable endpacks. The magnetic parameters that were tested included the effective length and the field shape variation. This report presents a description of the measurement techniques and the results for the effective length. The final endpack has an effective length at 1500 A (0.29T) of 2.6 {plus_minus} 0.3 mm greater than the steel length, and the change in effective length from 1500 A to maximum current of 9500 A (1.74T) is {minus}1.88 {plus_minus} 0.05 mm.

  12. Resistive Wall Instability in the NLC Main Damping Rings

    SciTech Connect

    Wolski, Andrzej

    2004-07-01

    We study transverse coupled-bunch instabilities driven by the resistive-wall impedance in the NLC Main Damping Rings. We compare the growth rates of the different modes predicted by a simple theory using a simplified lattice model with the results of a detailed simulation that includes variation of the beta functions and the actual fill structure of the machine. We find that the results of the analytical calculations are in reasonable agreement with the simulations. We include a simple model of a bunch-by-bunch feedback system in the simulation to show that the instabilities can be damped by a feedback system having parameters that are realistic, and possibly conservative. The noise level on the feedback system pick-up must be low, to avoid driving random bunch-to-bunch jitter above the specified limit of 10 percent of the vertical beam size.

  13. Ring Current Development During Storm Main Phase

    NASA Technical Reports Server (NTRS)

    Fok, Mei-Ching; Moore, Thomas E.; Greenspan, Marian E.

    1996-01-01

    The development of the ring current ions in the inner magnetosphere during the main phase of a magnetic storm is studied. The temporal and spatial evolution of the ion phase space densities in a dipole field are calculated using a three dimensional ring current model, considering charge exchange and Coulomb losses along drift paths. The simulation starts with a quiet time distribution. The model is tested by comparing calculated ion fluxes with Active Magnetospheric Particle Tracer Explorers/CCE measurement during the storm main phase on May 2, 1986. Most of the calculated omnidirectional fluxes are in good agreement with the data except on the dayside inner edge (L less than 2.5) of the ring current, where the ion fluxes are underestimated. The model also reproduces the measured pitch angle distributions of ions with energies below 10 keV. At higher energy, an additional diffusion in pitch angle is necessary in order to fit the data. The role of the induced electric field on the ring current dynamics is also examined by simulating a series of substorm activities represented by stretching and collapsing the magnetic field lines. In response to the impulsively changing fields, the calculated ion energy content fluctuates about a mean value that grows steadily with the enhanced quiescent field.

  14. Pendulum Motion in Main Parachute Clusters

    NASA Technical Reports Server (NTRS)

    Ray, Eric S.; Machin, Ricardo A.

    2015-01-01

    The coupled dynamics of a cluster of parachutes to a payload are notoriously difficult to predict. Often the payload is designed to be insensitive to the range of attitude and rates that might occur, but spacecraft generally do not have the mass and volume budgeted for this robust of a design. The National Aeronautics and Space Administration (NASA) Orion Capsule Parachute Assembly System (CPAS) implements a cluster of three mains for landing. During testing of the Engineering Development Unit (EDU) design, it was discovered that with a cluster of two mains (a fault tolerance required for human rating) the capsule coupled to the parachute cluster could get into a limit cycle pendulum motion which would exceed the spacecraft landing capability. This pendulum phenomenon could not be predicted with the existing models and simulations. A three phased effort has been undertaken to understand the consequence of the pendulum motion observed, and explore potential design changes that would mitigate this phenomenon. This paper will review the early analysis that was performed of the pendulum motion observed during EDU testing, summarize the analysis ongoing to understand the root cause of the pendulum phenomenon, and discuss the modeling and testing that is being pursued to identify design changes that would mitigate the risk.

  15. Phenological Parameters Estimation Tool

    NASA Technical Reports Server (NTRS)

    McKellip, Rodney D.; Ross, Kenton W.; Spruce, Joseph P.; Smoot, James C.; Ryan, Robert E.; Gasser, Gerald E.; Prados, Donald L.; Vaughan, Ronald D.

    2010-01-01

    The Phenological Parameters Estimation Tool (PPET) is a set of algorithms implemented in MATLAB that estimates key vegetative phenological parameters. For a given year, the PPET software package takes in temporally processed vegetation index data (3D spatio-temporal arrays) generated by the time series product tool (TSPT) and outputs spatial grids (2D arrays) of vegetation phenological parameters. As a precursor to PPET, the TSPT uses quality information for each pixel of each date to remove bad or suspect data, and then interpolates and digitally fills data voids in the time series to produce a continuous, smoothed vegetation index product. During processing, the TSPT displays NDVI (Normalized Difference Vegetation Index) time series plots and images from the temporally processed pixels. Both the TSPT and PPET currently use moderate resolution imaging spectroradiometer (MODIS) satellite multispectral data as a default, but each software package is modifiable and could be used with any high-temporal-rate remote sensing data collection system that is capable of producing vegetation indices. Raw MODIS data from the Aqua and Terra satellites is processed using the TSPT to generate a filtered time series data product. The PPET then uses the TSPT output to generate phenological parameters for desired locations. PPET output data tiles are mosaicked into a Conterminous United States (CONUS) data layer using ERDAS IMAGINE, or equivalent software package. Mosaics of the vegetation phenology data products are then reprojected to the desired map projection using ERDAS IMAGINE

  16. Characterization of the Local Structure in Liquid Water by Various Order Parameters.

    PubMed

    Duboué-Dijon, Elise; Laage, Damien

    2015-07-01

    A wide range of geometric order parameters have been suggested to characterize the local structure of liquid water and its tetrahedral arrangement, but their respective merits have remained elusive. Here, we consider a series of popular order parameters and analyze molecular dynamics simulations of water, in the bulk and in the hydration shell of a hydrophobic solute, at 298 and 260 K. We show that these parameters are weakly correlated and probe different distortions, for example the angular versus radial disorders. We first combine these complementary descriptions to analyze the structural rearrangements leading to the density maximum in liquid water. Our results reveal no sign of a heterogeneous mixture and show that the density maximum arises from the depletion in interstitial water molecules upon cooling. In the hydration shell of the hydrophobic moiety of propanol, the order parameters suggest that the water local structure is similar to that in the bulk, with only a very weak depletion in ordered configurations, thus confirming the absence of any iceberg-type structure. Finally, we show that the main structural fluctuations that affect water reorientation dynamics in the bulk are angular distortions, which we explain by the jump hydrogen-bond exchange mechanism. PMID:26054933

  17. Parameter optimization of gravity density inversion based on correlation searching and the golden section algorithm

    NASA Astrophysics Data System (ADS)

    Sun, Lu-Ping; Liu, Zhan; Shou, Hao; Zhang, Yu-Hua

    2012-06-01

    For density inversion of gravity anomaly data, once the inversion method is determined, the main factors affecting the inversion result are the inversion parameters and subdivision scheme. A set of reasonable inversion parameters and subdivision scheme can, not only improve the inversion process efficiency, but also ensure inversion result accuracy. The gravity inversion method based on correlation searching and the golden section algorithm is an effective potential field inversion method. It can be used to invert 2D and 3D physical properties with potential data observed on flat or rough surfaces. In this paper, we introduce in detail the density inversion principles based on correlation searching and the golden section algorithm. Considering that the gold section algorithm is not globally optimized, we present a heuristic method to ensure the inversion result is globally optimized. With a series of model tests, we systematically compare and analyze the inversion result efficiency and accuracy with different parameters. Based on the model test results, we conclude the selection principles for each inversion parameter with which the inversion accuracy can be obviously improved.

  18. Mesoscale meteorology of the New England coast. Gulf of Maine, and Nova Scotia: Overview

    Microsoft Academic Search

    Wayne M. Angevine; Michael Trainer; Stuart A. McKeen; Carl M. Berkowitz

    1996-01-01

    The North Atlantic Regional Experiment (NARE) domain includes the coastal and near-coastal areas of New England and Atlantic Canada, and the intervening Gulf of Maine. This area has a complex coastline on all scales. The meteorology of the region is affected by the contrasting properties of the land and ocean, especially the temperature contrast. This paper reviews the knowledge of

  19. Structure and formation of the highly stable marine boundary layer over the Gulf of Maine

    Microsoft Academic Search

    Wayne M. Angevine; J. E. Hare; C. W. Fairall; Daniel E. Wolfe; R. J. Hill; W. A. Brewer; Allen B. White

    2006-01-01

    A shallow, stable boundary layer is ubiquitous over the cool waters of the Gulf of Maine in summer. This layer affects pollutant transport throughout the region by isolating overlying flow from the surface. In this paper, we explore how the stable boundary layer is formed and describe its characteristics. The temperature profile of the lowest 1–2 km of the atmosphere

  20. Proline puckering parameters for collagen structure simulations

    NASA Astrophysics Data System (ADS)

    Wu, Di

    2015-03-01

    Collagen is made of triple helices rich in proline residues, and hence is influenced by the conformational motions of prolines. Because the backbone motions of prolines are restricted by the helical structures, the only side chain motion—proline puckering—becomes an influential factor that may affect the stability of collagen structures. In molecular simulations, a proper proline puckering population is desired so to yield valid results of the collagen properties. Here we design the proline puckering parameters in order to yield suitable proline puckering populations as demonstrated in the experimental results. We test these parameters in collagen and the proline dipeptide simulations. Compared with the results of the PDB and the quantum calculations, we propose the proline puckering parameters for the selected collagen model simulations.

  1. Reconstruction of Twist Torque in Main Parachute Risers

    NASA Technical Reports Server (NTRS)

    Day, Joshua D.

    2015-01-01

    The reconstruction of twist torque in the Main Parachute Risers of the Capsule Parachute Assembly System (CPAS) has been successfully used to validate CPAS Model Memo conservative twist torque equations. Reconstruction of basic, one degree of freedom drop tests was used to create a functional process for the evaluation of more complex, rigid body simulation. The roll, pitch, and yaw of the body, the fly-out angles of the parachutes, and the relative location of the parachutes to the body are inputs to the torque simulation. The data collected by the Inertial Measurement Unit (IMU) was used to calculate the true torque. The simulation then used photogrammetric and IMU data as inputs into the Model Memo equations. The results were then compared to the true torque results to validate the Model Memo equations. The Model Memo parameters were based off of steel risers and the parameters will need to be re-evaluated for different materials. Photogrammetric data was found to be more accurate than the inertial data in accounting for the relative rotation between payload and cluster. The Model Memo equations were generally a good match and when not matching were generally conservative.

  2. Tutorial on underwater electrical discharges: main features and applications

    NASA Astrophysics Data System (ADS)

    Krasik, Yakov

    2013-09-01

    Main features of underwater electrical discharge with short description of models (``bubble'', ``explosive emission'', ``ionization'' and ``thermal''), parameters of the discharge (threshold electric field versus polarity, time duration, frequency, pressure, interelectrode gap and area of electrodes, velocity of streamer propagation and density and temperature of the plasma, strong shock waves) and different electrical and optical diagnostics which were used in this research will be shortly reviewed. Such main applications of underwater electrical discharge as electro-hydraulic forming, destruction of rocks, low-inductance water spark gap switches, treatment of pollutants in water and extracorporeal shock wave lithotripsy will be discussed. Finally, results of application of underwater electrical explosion of single wires in nanosecond - microsecond timescales for research related to Equation of State of different materials at extreme conditions and underwater electrical explosion of wire arrays in cylindrical and spherical configurations for generation of converging strong shock waves using moderate high-power generators for research of compressed water at extreme conditions will be presented.

  3. A multi-channel data collection system for physiological parameters

    Microsoft Academic Search

    C. W. Chi; M. C. Lee; C. W. Shieh; Y. S. Huang; M. S. Young

    1999-01-01

    Many physiological parameters of patients, such as ECG, body temperature, respiration, blood pressure, and etc., are important indices of the patients' recovery extent. The aim of this study is to establish a data collection system, which is independent and integrated, for physiological parameters. A patient server system is built based on a MCS-8051 single-chip, the same as a main frame.

  4. Factor analysis of Galactic globular clusters on structural parameters

    E-print Network

    O. Eigenson; O. Yatsyk

    2000-11-08

    Principal component method is used to study galactic globular clusters in 7- and 8-axis space of structural parameters. It is shown that the manifold properties of clusters with this set of parameters is determined mainly by two independent factors. This result may be useful for the theory of formation and evolution of clusters.

  5. National Launch System Space Transportation Main Engine

    NASA Technical Reports Server (NTRS)

    Hoodless, Ralph M., Jr.; Monk, Jan C.; Cikanek, Harry A., III

    1991-01-01

    The present liquid-oxygen/liquid-hydrogen engine is described as meeting the specific requirements of the National Launch System (NLS) Program including cost-effectiveness and robustness. An overview of the NLS and its objectives is given which indicates that the program aims to develop a flexible launch system to meet security, civil, and commercial needs. The Space Transportation Main Engine (STME) provides core and boost propulsion for the 1.5-stage vehicle and core propulsion for the solid booster vehicle. The design incorporates step-throttling, order-of-magnitude reductions in welds, and configuration targets designed to optimize robustness. The STME is designed to provide adaptable and dependable propulsion while minimizing recurring costs and is designed to meet the needs of NLS and other typical space-transportation programs currently being planned.

  6. Siberian snakes for the Fermilab Main Injector

    SciTech Connect

    Anferov, V.A.; Baiod, R.; Courant, E.D. [and others

    1993-04-01

    Appropriate Siberian snakes were designed to maintain the proton beam polarization during acceleration in the Fermilab Main Injector from 8 to 150 GeV. Various snake designs were investigated to find one fitting into the 14 m straight section spaces with the required spin rotation axis and the minimum orbit excursion. The authors studied both cold and warm discrete magnet snakes as well as warm snakes with helical magnets. For the warm discrete magnet snake, obtaining small orbit excursions required a nearly longitudinal snake axis, while axes near {+-}45{degrees} are needed when using two snakes in a ring. The authors found acceptable snakes either by using superconducting magnets or by using warm magnets with a helical dipole field.

  7. Maine Department of Conservation: Wetlands Activity

    NSDL National Science Digital Library

    2011-07-18

    This four-week unit contains activities in which students investigate the natural history of a wetland, identify its boundaries, and study how it functions in the environment. They will investigate the formation of wetlands in Maine; prepare a series of map overlays researching wetland conditions for a site they have chosen in the community; learn how to recognize a wetland by hydrology, vegetation, and soil type; inventory the functions of the wetland site; and write an evaluation for it. To conclude the unit, the students will hold a mock town meeting in which they discuss the views of the various interested parties in preserving or destroying the wetland and debate the merits of the proposed changes to federal wetlands regulations.

  8. Main challenges for ITER optical diagnostics

    SciTech Connect

    Vukolov, K. Yu.; Orlovskiy, I. I.; Alekseev, A. G.; Borisov, A. A.; Andreenko, E. N.; Kukushkin, A. B.; Lisitsa, V. S.; Neverov, V. S. [Tokamak Physics Institute, NRC Kurchatov Institute, 123182 Moscow (Russian Federation)

    2014-08-21

    The review is made of the problems of ITER optical diagnostics. Most of these problems will be related to the intensive neutron radiation from hot plasma. At a high level of radiation loads the most types of materials gradually change their properties. This effect is most critical for optical diagnostics because of degradation of optical glasses and mirrors. The degradation of mirrors, that collect the light from plasma, basically will be induced by impurity deposition and (or) sputtering by charge exchange atoms. Main attention is paid to the search of glasses for vacuum windows and achromatic lens which are stable under ITER irradiation conditions. The last results of irradiation tests in nuclear reactor of candidate silica glasses KU-1, KS-4V and TF 200 are presented. An additional problem is discussed that deals with the stray light produced by multiple reflections from the first wall of the intense light emitted in the divertor plasma.

  9. Remotely triggered earthquakes following moderate main shocks

    USGS Publications Warehouse

    Hough, S.E.

    2007-01-01

    Since 1992, remotely triggered earthquakes have been identified following large (M > 7) earthquakes in California as well as in other regions. These events, which occur at much greater distances than classic aftershocks, occur predominantly in active geothermal or volcanic regions, leading to theories that the earthquakes are triggered when passing seismic waves cause disruptions in magmatic or other fluid systems. In this paper, I focus on observations of remotely triggered earthquakes following moderate main shocks in diverse tectonic settings. I summarize evidence that remotely triggered earthquakes occur commonly in mid-continent and collisional zones. This evidence is derived from analysis of both historic earthquake sequences and from instrumentally recorded M5-6 earthquakes in eastern Canada. The latter analysis suggests that, while remotely triggered earthquakes do not occur pervasively following moderate earthquakes in eastern North America, a low level of triggering often does occur at distances beyond conventional aftershock zones. The inferred triggered events occur at the distances at which SmS waves are known to significantly increase ground motions. A similar result was found for 28 recent M5.3-7.1 earthquakes in California. In California, seismicity is found to increase on average to a distance of at least 200 km following moderate main shocks. This supports the conclusion that, even at distances of ???100 km, dynamic stress changes control the occurrence of triggered events. There are two explanations that can account for the occurrence of remotely triggered earthquakes in intraplate settings: (1) they occur at local zones of weakness, or (2) they occur in zones of local stress concentration. ?? 2007 The Geological Society of America.

  10. Effects of Tube Rupture Modeling and Parameters on Analysis of MSGTR Event Progression in PWR

    SciTech Connect

    Jeong, Ji Hwan [Dept of Environmental System, Cheonan College of Foreign Studies, Anseo-dong, Cheonan, Choongnam, 330-705 (Korea, Republic of); Choi, Ki Yong [Thermal-Hydraulic Safety Research Team, Korea Atomic Energy Research Institute, Deogjin-dong, Yusong-gu, Daejeon, 305-353 (Korea, Republic of); Chang, Keun Sun; Kweon, Young Chel [Dept of Mechanical Engineering, Sunmoon University, Tangjeong-myeon, Asan, Choongnam, 336-708 (Korea, Republic of)

    2002-07-01

    A multiple steam generator tube rupture (MSGTR) event in APR1400 has been investigated using the best estimate thermal hydraulic system code, MARS1.4. The effects of parameters such as the number of ruptured tubes, rupture location, affected steam generator on analysis of the MSGTR event in APR1400 is examined. In particular, tube rupture modeling methods, single tube modeling (STM) and double tube modeling (DTM), are compared. When five tubes are ruptured, the STM predicts the operator response time of 2085 seconds before main steam safety valves (MSSVs) are lifted. The effects of rupture location on the MSSV lift time is not significant in case of STM, but the MSSV lift time for tube-top rupture is found to be 25.3% larger than that for rupture at hog-leg side tube sheet in case of DTM. The MSSV lift time for the cases that both steam generators are affected (4C5x, 4C23x) are found to be larger than that of the single steam generator cases (4A5x, 4B5x) due to a bifurcation of the primary leak flow. The discharge coefficient of Cd is found to affect the MSSV lift time only for smaller value of 0.5. It is found that the most dominant parameter governing the MSSV lift time is the leak flow rate. Whether any modeling method is used, it gives the similar MSSV lift time if the leak flow rate is close, except the case of both steam generators are affected. Therefore, the system performance and the MSSV lift time of the APR1400 are strongly dependent on the break flow model used in the best estimate system code. (authors)

  11. Factors Affecting Option Premium Values 

    E-print Network

    Johnson, Jason; Smith, Jackie; Dhuyvetter, Kevin C.; Waller, Mark L.

    1999-06-23

    Factors Affecting Option Premium Values Jason Johnson, Jackie Smith, Kevin Dhuyvetter and Mark Waller* Put Options Hedging in the futures market with options is much like buying an insurance policy to protect commodity sellers against declining...

  12. How intimacy affects resource conceptualization

    E-print Network

    Dunn, Allison L

    2001-01-01

    : Jane Scil (Chair of Committee) Lisa Matthews (Memberi William Graziano (Memberi ogelio Saenz (Head of Department) MAY 2001 Major Subject: Sociology ABSTRACT How Intimacy Affects Resource Conceptualization. (May 2001) Allison L. Dunn, B. A...

  13. Theoretical mass loss rates of cool main-sequence stars

    E-print Network

    V. Holzwarth; M. Jardine

    2006-11-14

    We develop a model for the wind properties of cool main-sequence stars, which comprises their wind ram pressures, mass fluxes, and terminal wind velocities. The wind properties are determined through a polytropic magnetised wind model, assuming power laws for the dependence of the thermal and magnetic wind parameters on the stellar rotation rate. We use empirical data to constrain theoretical wind scenarios, which are characterised by different rates of increase of the wind temperature, wind density, and magnetic field strength. Scenarios based on moderate rates of increase yield wind ram pressures in agreement with most empirical constraints, but cannot account for some moderately rotating targets, whose high apparent mass loss rates are inconsistent with observed coronal X-ray and magnetic properties. For fast magnetic rotators, the magneto-centrifugal driving of the outflow can produce terminal wind velocities far in excess of the surface escape velocity. Disregarding this aspect in the analyses of wind ram pressures leads to overestimations of stellar mass loss rates. The predicted mass loss rates of cool main-sequence stars do not exceed about ten times the solar value. Our results are in contrast with previous investigations, which found a strong increase of the stellar mass loss rates with the coronal X-ray flux. Owing to the weaker dependence, we expect the impact of stellar winds on planetary atmospheres to be less severe and the detectability of magnetospheric radio emission to be lower then previously suggested. Considering the rotational evolution of a one solar-mass star, the mass loss rates and the wind ram pressures are highest during the pre-main sequence phase.

  14. Sublinear singular elliptic problems with two parameters

    Microsoft Academic Search

    Marius Ghergu; Vicen?iu R?dulescu

    2003-01-01

    We establish several existence and nonexistence results for the boundary value problem ??u+K(x)g(u)=?f(x,u)+?h(x) in ?, u=0 on ??, where ? is a smooth bounded domain in RN, ? and ? are positive parameters, h is a positive function, while f has a sublinear growth. The main feature of this paper is that the nonlinearity g is assumed to be unbounded

  15. Telemetry methods for monitoring physiological parameters

    NASA Technical Reports Server (NTRS)

    Fryer, T. B.; Sandler, H.

    1982-01-01

    The use of telemetry to monitor various physiological functions is discussed. The advantages of the technique and the parameters that it can monitor are assessed, and the main telemetry systems, including pressure telemetry, flow telemetry, and multichannel telemetry, are detailed. Human applications of implanted flow transducers, total implant versus backpack telemetry, the use of power sources and integrated circuits in telemetry, and the future prospects of the technique in hypertension treatment and research are discussed.

  16. Mirror symmetry for two-parameter models (I)

    Microsoft Academic Search

    Philip Candelas; Xenia de La Ossa; Sheldon Katz; Douglas Robert Ogston Morrison

    1994-01-01

    We study, by means of mirror symmetry, the quantum geometry of the Kähler-class parameters of a number of Calabi-Yau manifolds that have b11 = 2. Our main interest lies in the structure of the moduli space and in the loci corresponding to singular models. This structure is considerably richer when there are two parameters than in the various one-parameter models

  17. Conseils utiles pour se laver les mains Se laver les mains frquemment et correctement constitue la protection la plus

    E-print Network

    Conseils utiles pour se laver les mains Se laver les mains fréquemment et correctement constitue la (virus de Norwalk). Lavez-vous les mains après : o être allé aux toilettes o avoir toussé ou éternué dans vos mains o participé à des activités susceptibles de contaminer les mains Lavez-vous les mains

  18. The effect of filtering processes on surface roughness parameters and their correlation with the measured friction, Part II: porcelain tiles

    Microsoft Academic Search

    Wen-Ruey Chang

    2000-01-01

    It is known that surface roughness affects friction, but it is unclear which surface characteristics are better correlated with friction. Moreover, the filter process used in a surface roughness measurement affects the values of surface parameters and, therefore, affects surface representations. The effect of filter selection on the surface parameters of unglazed quarry tiles and their correlation with the measured

  19. The effect of filtering processes on surface roughness parameters and their correlation with the measured friction, Part I: quarry tiles

    Microsoft Academic Search

    Wen-Ruey Chang; S. Matz

    2000-01-01

    It is known that surface roughness affects friction, but it is unclear which surface characteristics are better correlated with friction. Moreover, the filter process used in surface roughness measurement affects the values of surface parameters and, therefore, affects surface representations. The effect of filter selection on the surface parameters and their correlation with the measured friction was investigated in this

  20. Computational approaches for RNA energy parameter estimation

    PubMed Central

    Andronescu, Mirela; Condon, Anne; Hoos, Holger H.; Mathews, David H.; Murphy, Kevin P.

    2010-01-01

    Methods for efficient and accurate prediction of RNA structure are increasingly valuable, given the current rapid advances in understanding the diverse functions of RNA molecules in the cell. To enhance the accuracy of secondary structure predictions, we developed and refined optimization techniques for the estimation of energy parameters. We build on two previous approaches to RNA free-energy parameter estimation: (1) the Constraint Generation (CG) method, which iteratively generates constraints that enforce known structures to have energies lower than other structures for the same molecule; and (2) the Boltzmann Likelihood (BL) method, which infers a set of RNA free-energy parameters that maximize the conditional likelihood of a set of reference RNA structures. Here, we extend these approaches in two main ways: We propose (1) a max-margin extension of CG, and (2) a novel linear Gaussian Bayesian network that models feature relationships, which effectively makes use of sparse data by sharing statistical strength between parameters. We obtain significant improvements in the accuracy of RNA minimum free-energy pseudoknot-free secondary structure prediction when measured on a comprehensive set of 2518 RNA molecules with reference structures. Our parameters can be used in conjunction with software that predicts RNA secondary structures, RNA hybridization, or ensembles of structures. Our data, software, results, and parameter sets in various formats are freely available at http://www.cs.ubc.ca/labs/beta/Projects/RNA-Params. PMID:20940338

  1. Parameter Learning for Performance Mark D. Peek and Panos J. Antsaklis

    E-print Network

    Antsaklis, Panos

    Parameter Learning for Performance Adaptation Mark D. Peek and Panos J. Antsaklis A parameter. Peek is uith Tellah\\ Research Center. 3702 N. Main St. Bldg. 2, Suite 101. Mishawaka. IN 46545. Pano\\ J

  2. Bayesian wavelet approaches for parameter estimation and change point detection in long memory processes 

    E-print Network

    Ko, Kyungduk

    2005-11-01

    The main goal of this research is to estimate the model parameters and to detect multiple change points in the long memory parameter of Gaussian ARFIMA(p, d, q) processes. Our approach is Bayesian and inference is done on ...

  3. Bisabololoxide A, one of the main constituents in German chamomile extract, induces apoptosis in rat thymocytes.

    PubMed

    Ogata, Ikuko; Kawanai, Takuya; Hashimoto, Erika; Nishimura, Yumiko; Oyama, Yasuo; Seo, Hakaru

    2010-01-01

    German chamomile (Matricaria recutita L.), one of the popular ingredients in herbal teas, has been traditionally used for medicinal purposes. Bisabololoxide A (BSBO) is one of the main constituents in this herb. BSBO is supposed to be principle in some bioactivities of German chamomile such as anti-inflammatory, gastrointestinal, and antipruritic actions. Although the use of German chamomile has spread, the information related to toxicity of BSBO is very limited. In present study, the cytotoxic effect of micromolar BSBO was cytometrically examined on rat thymocytes by using appropriate fluorescent dyes. When the cells were incubated with BSBO for 24 h, BSBO at concentrations of 30 microM or more significantly increased populations of dead cells, shrunken cells, and cells with phosphatidylserine exposed on membrane surface. Both cell shrinkage and externalization of membrane phosphatidylserine are general features in an early stage of apoptosis. In addition, BSBO significantly increased population of cells containing hypodiploid DNA, and the increase was completely attenuated by Z-VAD-FMK, a pan-inhibitor for caspases, indicating an involvement of caspase activation. Thus, it is likely that the type of cell death induced by BSBO is apoptosis. The significant changes in cellular parameters of rat thymocytes by BSBO were not observed when the concentration was 10 microM or less. Furthermore, the short incubation (3 h) of cells even with 30-100 microM BSBO did not significantly affect the cells. Therefore, it may be suggested that BSBO is practically safe when German chamomile is conventionally used. PMID:19834689

  4. Singularities affect dynamics of learning in neuromanifolds.

    PubMed

    Amari, Shun-ichi; Park, Hyeyoung; Ozeki, Tomoko

    2006-05-01

    The parameter spaces of hierarchical systems such as multilayer perceptrons include singularities due to the symmetry and degeneration of hidden units. A parameter space forms a geometrical manifold, called the neuromanifold in the case of neural networks. Such a model is identified with a statistical model, and a Riemannian metric is given by the Fisher information matrix. However, the matrix degenerates at singularities. Such a singular structure is ubiquitous not only in multilayer perceptrons but also in the gaussian mixture probability densities, ARMA time-series model, and many other cases. The standard statistical paradigm of the Cramér-Rao theorem does not hold, and the singularity gives rise to strange behaviors in parameter estimation, hypothesis testing, Bayesian inference, model selection, and in particular, the dynamics of learning from examples. Prevailing theories so far have not paid much attention to the problem caused by singularity, relying only on ordinary statistical theories developed for regular (nonsingular) models. Only recently have researchers remarked on the effects of singularity, and theories are now being developed. This article gives an overview of the phenomena caused by the singularities of statistical manifolds related to multilayer perceptrons and gaussian mixtures. We demonstrate our recent results on these problems. Simple toy models are also used to show explicit solutions. We explain that the maximum likelihood estimator is no longer subject to the gaussian distribution even asymptotically, because the Fisher information matrix degenerates, that the model selection criteria such as AIC, BIC, and MDL fail to hold in these models, that a smooth Bayesian prior becomes singular in such models, and that the trajectories of dynamics of learning are strongly affected by the singularity, causing plateaus or slow manifolds in the parameter space. The natural gradient method is shown to perform well because it takes the singular geometrical structure into account. The generalization error and the training error are studied in some examples. PMID:16595057

  5. All-Stokes Parameterization of the Main Beam and First Sidelobe for the Arecibo Radio Telescope

    NASA Astrophysics Data System (ADS)

    Heiles, Carl; Perillat, Phil; Nolan, Michael; Lorimer, Duncan; Bhat, Ramesh; Ghosh, Tapasi; Howell, Ellen; Lewis, Murray; O'Neil, Karen; Salter, Chris; Stanimirovic, Snezana

    2001-10-01

    Radio astronomical measurements of extended emission require knowledge of the beam shape and response because the measurements need correction for quantities such as beam efficiency and beamwidth. We describe a scheme that characterizes the main beam and sidelobe in all Stokes parameters employing parameters that allow reconstruction of the complete beam patterns and, also, afford an easy way to see how the beam changes with azimuth, zenith angle, and time. For the main beam in Stokes I, the parameters include the beamwidth, ellipticity and its orientation, coma and its orientation, the point-source gain, and the integrated gain (or, equivalently, the main-beam efficiency); for the other Stokes parameters, the beam parameters include beam squint and beam squash. For the first sidelobe ring in Stokes I, the parameters include an eight-term Fourier series describing the height, radius, and radial width; for the other Stokes parameters they include only the sidelobe's fractional polarization. We illustrate the technique by applying it to the Arecibo telescope. The main-beam width is smaller and the sidelobe levels higher than for a uniformly illuminated aperture of the same effective area. These effects are modeled modestly well by a blocked aperture, with the blocked area equal to about 10% of the effective area (this corresponds to 5% physical blockage). In polarized emission, the effects of beam squint (difference in pointing direction between orthogonal polarizations) and squash (difference in beamwidth between orthogonal polarizations) do not correspond to theoretical expectation and are higher than expected; these effects are almost certainly caused by the blockage. The first sidelobe is highly polarized because of blockage. These polarization effects lead to severe contamination of maps of polarized emission by spatial derivatives in brightness temperature.

  6. GAS MAIN SENSOR AND COMMUNICATIONS NETWORK SYSTEM

    SciTech Connect

    Hagen Schempf, Ph.D.

    2003-02-27

    Automatika, Inc. was contracted by the Department of Energy (DOE) and with co-funding from the New York Gas Group (NYGAS), to develop an in-pipe natural gas prototype measurement and wireless communications system for assessing and monitoring distribution networks. A prototype system was built for low-pressure cast-iron mains and tested in a spider- and serial-network configuration in a live network in Long Island with the support of Keyspan Energy, Inc. The prototype unit combined sensors capable of monitoring pressure, flow, humidity, temperature and vibration, which were sampled and combined in data-packages in an in-pipe master-slave architecture to collect data from a distributed spider-arrangement, and in a master-repeater-slave configuration in serial or ladder-network arrangements. It was found that the system was capable of performing all data-sampling and collection as expected, yielding interesting results as to flow-dynamics and vibration-detection. Wireless in-pipe communications were shown to be feasible and valuable data was collected in order to determine how to improve on range and data-quality in the future.

  7. Chemical quality of precipitation at Greenville, Maine

    USGS Publications Warehouse

    Smath, J.A.; Potter, T.L.

    1987-01-01

    Weekly composite precipitation samples were collected at a rural site located in Greenville, Maine for analysis of trace metals and organic compounds. Samples collected during February 1982, through May 1984, were analyzed for cadmium, chromium, copper, lead, mercury, nickel, and zinc and during February 1982, through March 1983, for chlorinated hydrocarbon pesticides, pthalate ester plasticizers, and polychlorinated biphenyls. Deposition rates were computed. Data reported by the NADP (National Atmospheric Deposition Program) was used to evaluate the general chemical quality of the precipitation. The precipitation had relatively high concentrations of hydrogen ions, sulfate, and nitrate, compared to other constituents. Of the trace metals included for analysis, only copper, lead, and zinc were consistently detected. Lead concentrations exceeded the U.S. EPA recommended limit for domestic water supply in three samples. High deposition rates for some of the metals were episodic. Alpha-hexachlorocyclohexane was the only organic compound that was consistently detected (maximum 120 nanograms/L). None of the other organic compounds were detected in any of the samples. (Author 's abstract)

  8. The main auxin biosynthesis pathway in Arabidopsis.

    PubMed

    Mashiguchi, Kiyoshi; Tanaka, Keita; Sakai, Tatsuya; Sugawara, Satoko; Kawaide, Hiroshi; Natsume, Masahiro; Hanada, Atsushi; Yaeno, Takashi; Shirasu, Ken; Yao, Hong; McSteen, Paula; Zhao, Yunde; Hayashi, Ken-ichiro; Kamiya, Yuji; Kasahara, Hiroyuki

    2011-11-01

    The phytohormone auxin plays critical roles in the regulation of plant growth and development. Indole-3-acetic acid (IAA) has been recognized as the major auxin for more than 70 y. Although several pathways have been proposed, how auxin is synthesized in plants is still unclear. Previous genetic and enzymatic studies demonstrated that both TRYPTOPHAN AMINOTRANSFERASE OF ARABIDOPSIS (TAA) and YUCCA (YUC) flavin monooxygenase-like proteins are required for biosynthesis of IAA during plant development, but these enzymes were placed in two independent pathways. In this article, we demonstrate that the TAA family produces indole-3-pyruvic acid (IPA) and the YUC family functions in the conversion of IPA to IAA in Arabidopsis (Arabidopsis thaliana) by a quantification method of IPA using liquid chromatography-electrospray ionization-tandem MS. We further show that YUC protein expressed in Escherichia coli directly converts IPA to IAA. Indole-3-acetaldehyde is probably not a precursor of IAA in the IPA pathway. Our results indicate that YUC proteins catalyze a rate-limiting step of the IPA pathway, which is the main IAA biosynthesis pathway in Arabidopsis. PMID:22025724

  9. The two main theories on dental bruxism.

    PubMed

    Behr, Michael; Hahnel, Sebastian; Faltermeier, Andreas; Bürgers, Ralf; Kolbeck, Carola; Handel, Gerhard; Proff, Peter

    2012-03-20

    Bruxism is characterized by non-functional contact of mandibular and maxillary teeth resulting in clenching or grating of teeth. Theories on factors causing bruxism are a matter of controversy in current literature. The dental profession has predominantly viewed peripheral local morphological disorders, such as malocclusion, as the cause of clenching and gnashing. This etiological model is based on the theory that occlusal maladjustment results in reduced masticatory muscle tone. In the absence of occlusal equilibration, motor neuron activity of masticatory muscles is triggered by periodontal receptors. The second theory assumes that central disturbances in the area of the basal ganglia are the main cause of bruxism. An imbalance in the circuit processing of the basal ganglia is supposed to be responsible for muscle hyperactivity during nocturnal dyskinesia such as bruxism. Some authors assume that bruxism constitutes sleep-related parafunctional activity (parasomnia). A recent model, which may explain the potential imbalance of the basal ganglia, is neuroplasticity. Neural plasticity is based on the ability of synapses to change the way they work. Activation of neural plasticity can change the relationship between inhibitory and excitatory neurons. It seems obvious that bruxism is not a symptom specific to just one disease. Many forms (and causes) of bruxism may exist simultaneously, as, for example, peripheral or central forms. PMID:22035706

  10. Primary Productivity in Meduxnekeag River, Maine, 2005

    USGS Publications Warehouse

    Goldstein, Robert M.; Schalk, Charles W.; Kempf, Joshua P.

    2009-01-01

    During August and September 2005, dissolved oxygen, temperature, pH, specific conductance, streamflow, and light intensity (LI) were determined continuously at six sites defining five reaches on Meduxnekeag River above and below Houlton, Maine. These data were collected as input for a dual-station whole-stream metabolism model to evaluate primary productivity in the river above and below Houlton. The river receives nutrients and organic matter from tributaries and the Houlton wastewater treatment plant (WWTP). Model output estimated gross and net primary productivity for each reach. Gross primary productivity (GPP) varied in each reach but was similar and positive among the reaches. GPP was correlated to LI in the four reaches above the WWTP but not in the reach below. Net primary productivity (NPP) decreased in each successive downstream reach and was negative in the lowest two reaches. NPP was weakly related to LI in the upper two reaches and either not correlated or negatively correlated in the lower three reaches. Relations among GPP, NPP, and LI indicate that the system is heterotrophic in the downstream reaches. The almost linear decrease in NPP (the increase in metabolism and respiration) indicates a cumulative effect of inputs of nutrients and organic matter from tributaries that drain agricultural land, the town of Houlton, and the discharges from the WWTP.

  11. The main auxin biosynthesis pathway in Arabidopsis

    PubMed Central

    Mashiguchi, Kiyoshi; Tanaka, Keita; Sakai, Tatsuya; Sugawara, Satoko; Kawaide, Hiroshi; Natsume, Masahiro; Hanada, Atsushi; Yaeno, Takashi; Shirasu, Ken; Yao, Hong; McSteen, Paula; Zhao, Yunde; Hayashi, Ken-ichiro; Kamiya, Yuji; Kasahara, Hiroyuki

    2011-01-01

    The phytohormone auxin plays critical roles in the regulation of plant growth and development. Indole-3-acetic acid (IAA) has been recognized as the major auxin for more than 70 y. Although several pathways have been proposed, how auxin is synthesized in plants is still unclear. Previous genetic and enzymatic studies demonstrated that both TRYPTOPHAN AMINOTRANSFERASE OF ARABIDOPSIS (TAA) and YUCCA (YUC) flavin monooxygenase-like proteins are required for biosynthesis of IAA during plant development, but these enzymes were placed in two independent pathways. In this article, we demonstrate that the TAA family produces indole-3-pyruvic acid (IPA) and the YUC family functions in the conversion of IPA to IAA in Arabidopsis (Arabidopsis thaliana) by a quantification method of IPA using liquid chromatography–electrospray ionization–tandem MS. We further show that YUC protein expressed in Escherichia coli directly converts IPA to IAA. Indole-3-acetaldehyde is probably not a precursor of IAA in the IPA pathway. Our results indicate that YUC proteins catalyze a rate-limiting step of the IPA pathway, which is the main IAA biosynthesis pathway in Arabidopsis. PMID:22025724

  12. Mercury concentrations in Maine sport fishes

    SciTech Connect

    Stafford, C.P. [Univ. of Maine, Orono, ME (United States)] [Univ. of Maine, Orono, ME (United States); Haines, T.A. [Geological Survey, Orono, ME (United States)] [Geological Survey, Orono, ME (United States)

    1997-01-01

    To assess mercury contamination of fish in Maine, fish were collected from 120 randomly selected lakes. The collection goal for each lake was five fish of the single most common sport fish species within the size range commonly harvested by anglers. Skinless, boneless fillets of fish from each lake were composited, homogenized, and analyzed for total mercury. The two most abundant species, brook trout Salvelinus fontinalis and smallmouth bass Micropterus dolomieu, were also analyzed individually. The composite fish analyses indicate high concentrations of mercury, particularly in large and long-lived nonsalmonid species. Chain pickerel Esox niger, smallmouth bass, largemouth bass Micropterus salmoides, and white perch Morone americana had the highest average mercury concentrations, and brook trout and yellow perch Perca flavescens had the lowest. The mean species composite mercury concentration was positively correlated with a factor incorporating the average size and age of the fish. Lakes containing fish with high mercury concentrations were not clustered near known industrial or population centers but were commonest in the area within 150 km of the seacoast, reflecting the geographical distribution of species that contained higher mercury concentrations. Stocked and wild brook trout were not different in length or weight, but wild fish were older and had higher mercury concentrations. Fish populations maintained by frequent introductions of hatchery-produced fish and subject to high angler exploitation rates may consist of younger fish with lower exposure to environmental mercury and thus contain lower concentrations than wild populations.

  13. MEGARA main optics opto-mechanics

    NASA Astrophysics Data System (ADS)

    Castillo-Domínguez, E.; Avilés, J. L.; Carrasco, E.; Maldonado, M.; Gil de Paz, Armando; Gallego, J.; Cedazo, R.; Iglesias, J.

    2014-08-01

    MEGARA is the future integral-field and multi-object spectrograph for the GTC 10.4m telescope located in the Observatorio del Roque de los Muchachos in La Palma. INAOE is a member of the MEGARA Consortium and it is in charge of the Optics Manufacturing work package. In addition to the manufacturing of 73 elements, the work package includes the opto-mechanics i.e. the opto-mechanical design, manufacture, tests and integration of the complete assembly of the main optics composed by the collimator and camera subsystems. MEGARA passed the Optics Detailed Design Review in May 2013 and will have the Detailed Design Review of the complete instrument early 2014. Here we describe the detailed design of the collimator and camera barrels. We also present the finite elements models developed to simulate the behavior of the barrel, sub-cells and other mechanical elements. These models verify that the expected stress fields and the gravitational displacements on the lenses are compatible with the optical quality tolerances. The design is finished and ready for fabrication.

  14. Submillimeter studies of main-sequence stars

    NASA Technical Reports Server (NTRS)

    Zuckerman, B.; Becklin, E. E.

    1993-01-01

    JCMT maps of the 800-micron emission from Vega, Fomalhaut, and Beta Pictoris are interpreted to indicate that they are not ringed by large reservoirs of distant orbiting dust particles that are too cold to have been detected by IRAS. A search for 800-micron emission from stars in the Pleiades and Ursa Majoris open clusters is reported. In comparison with the mass of dust particles near T Tauri and Herbig Ae stars, the JCMT data indicate a decline in dust mass during the initial 3 x 10 exp 8 yr that a star spends on the main sequence that is at least as rapid as (time) exp -2. It is estimated that in the Kuiper belt the ratio of total mass carried by small particles to that carried by comets is orders of magnitude smaller than this ratio is 1 AU from the sun. If 800-micron opacities calculated by Pollack et al. (1993) are correct, then the particles with radii less than 100 microns that dominate the FIR fluxes measured by IRAS cannot entirely account for the measured 800-micron fluxes at Vega, Beta Pic, and Fomalhaut; larger particles must be present as well.

  15. Effect of operational parameters on heavy metal removal by electrocoagulation.

    PubMed

    Bhagawan, D; Poodari, Saritha; Pothuraju, Tulasiram; Srinivasulu, D; Shankaraiah, G; Yamuna Rani, M; Himabindu, V; Vidyavathi, S

    2014-12-01

    In the present paper, the performance of electrocoagulation (EC) for the treatability of mixed metals (chromium (Cr), copper (Cu), lead (Pb), nickel (Ni), and zinc (Zn)) from metal plating industrial wastewater (EPW) has been investigated. The study mainly focused on the affecting parameters of EC process, such as electrode material, initial pH, distance between electrodes, electrode size, and applied voltage. The pH 8 is observed to be the best for metal removal. Fe-Fe electrode pair with 1-cm inter-electrode distance and electrode surface area of 40 cm(2) at an applied voltage of 8 V is observed to more efficient in the metal removal. Experiments have shown that the maximum removal percentage of the metals like Cr, Ni, Zn, Cu, and Pb are reported to be 96.2, 96.4, 99.9, 98, and 99.5 %, respectively, at a reaction time of 30 min. Under optimum conditions, the energy consumption is observed to be 51.40 kWh/m(3). The method is observed to be very effective in the removal of metals from electroplating effluent. PMID:25056749

  16. Investigations of ice formation in the Space Shuttle Main Engine 0209 main injector coolant cavity

    NASA Technical Reports Server (NTRS)

    Richards, D. R.; Charklwick, D. M.

    1991-01-01

    Severe main combustion chamber wall and main injector baffle element deterioration occurred during tests of Space Shuttle Main Engine 0209. One of the possible causes considered is ice formation and blockage of coolant to these components, resulting from the mixing of leaking hot turbine exhaust gas (hydrogen rich steam) and hydrogen coolant in the injector coolant cavity. The plausibility of ice blockage is investigated through simple mixing calculations for hot gas and hydrogen, investigation of condensation and water droplet formation, calculation of the freezing times for droplets, and the prediction of ice layer thicknesses. It is concluded that condensation and droplet formation can occur, and small water droplets that form can freeze very quickly when in contact with the cold coolant cavity surfaces. Copnservative analysis predicts, however, that the maximum thickness of the ice layers formed is too small to result in significant blockage of the coolant flow.

  17. [Affective disorders and eating disorders].

    PubMed

    Fakra, Eric; Belzeaux, R; Azorin, J M; Adida, M

    2014-12-01

    Epidemiologic studies show a frequent co-occurence of affective and eating disorders. The incidence of one disorder in patients suffering from the other disorder is well over the incidence in the general population. Several causes could explain this increased comorbidity. First, the iatrogenic origin is detailed. Indeed, psychotropic drugs, and particularly mood stabilizers, often lead to modification in eating behaviors, generally inducing weight gain. These drugs can increase desire for food, reduce baseline metabolism or decrease motor activity. Also, affective and eating disorders share several characteristics in semiology. These similarities can not only obscure the differential diagnosis but may also attest of conjoint pathophysiological bases in the two conditions. However, genetic and biological findings so far are too sparse to corroborate this last hypothesis. Nonetheless, it is noteworthy that comorbidity of affective and eating disorders worsens patients'prognosis and is associated with more severe forms of affective disorders characterized by an earlier age of onset in the disease, higher number of mood episodes and a higher suicidality. Lastly, psychotropic drugs used in affective disorders (lithium, antiepileptic mood stabilizers, atypical antipsychotics, antidepressants) are reviewed in order to weigh their efficacy in eating disorders. This could help establish the best therapeutic option when confronted to comorbidity. PMID:25550240

  18. Estimate LAMOST hot star's parameters by POLLUX

    NASA Astrophysics Data System (ADS)

    Zuo, Fang; Luo, Ali; Zhang, Jiannan

    2012-09-01

    With the highest efficiency of gathering spectra by LAMOST telescope, a large number of spectra have been obtained during commissioning observation, which included a lot of spectra of O type star. It’s a difficult task to obtain accurate parameters for hot star, lacking of a good model. Several stellar models, such as MAFAGS, ATLAS, Marcs etc, do not cover the parameter range which temperature exceeds 25000K. POLLUX is a database of synthetic stellar spectra, in which CMFGEN provides atmosphere models for the O type stars (Teff >25000K) [5]. A method of estimating stellar parameters for hot stars is presented in this paper, based on matching LAMOST observed spectra with the theoretical spectra library. We convert the resolution of CMFGEN spectra, which is about 150000 to LAMOST resolution of 2000. By comparing with the CMFGEN template spectra, we can obtain the parameters of observed hot stars. Estimation for the errors of the final parameters shows that low efficiency of LAMOST blue arms of the spectrographs does not affect O type star observations.

  19. Weak Lensing from Space III: Cosmological Parameters

    E-print Network

    Alexandre Refregier; Richard Massey; Jason Rhodes; Richard Ellis; Justin Albert; David Bacon; Gary Bernstein; Tim McKay; Saul Perlmutter

    2004-03-12

    Weak gravitational lensing provides a unique method to directly map the dark matter in the universe and measure cosmological parameters. Current weak lensing surveys are limited by the atmospheric seeing from the ground and by the small field of view of existing space telescopes. We study how a future wide-field space telescope can measure the lensing power spectrum and skewness, and set constraints on cosmological parameters. The lensing sensitivity was calculated using detailed image simulations and instrumental specifications studied in earlier papers in this series. For instance, the planned SuperNova/Acceleration Probe (SNAP) mission will be able to measure the matter density parameter Omega_m and the dark energy equation of state parameter w with precisions comparable and nearly orthogonal to those derived with SNAP from supernovae. The constraints degrade by a factor of about 2 if redshift tomography is not used, but are little affected if the skewness only is dropped. We also study how the constraints on these parameters depend upon the survey geometry and define an optimal observing strategy.

  20. Brook Trout Angling in Maine 2009 Survey Results

    E-print Network

    Thomas, Andrew

    Brook Trout Angling in Maine 2009 Survey Results Marc Edwards University of Maine Cooperative Extension Franklin County Office A Cooperative Project between the University of Maine Cooperative Extension and Maine Department of Inland Fisheries and Wildlife #12;2 Background In a meeting at University of Maine