Homojen Olmayan Elastik Konik Bir Kabuğun Üniform Olmayan Yanal Dış Basınç Yükü Etkisi Altında Stabilitesi

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2008Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2008Bu çalışmada homojen olmayan elastik kesik konik bir kabuğun uniform olmayan yanal basınç yükü etkisi altında stabilitesi incelenmiştir. Çalışmada, basit mesnetli homojen olmayan elastik malzemelerden oluşan konik kabukların temel bağıntıları çıkarılmış, değiştirilmiş Donnell tipi stabilite ve deformasyon uygunluk denklemleri elde edilmiş ve bu denklemlere Galerkin yöntemi uygulanarak uniform olmayan yanal basınç yükü için analitik ifade elde edilmiştir. Elde edilen ifade çevresel dalga sayısına göre minimize edilerek uniform olmayan kritik yanal basınç yükünün minimum değeri bulunmuştur. Son olarak da hesaplar yapılarak, koni parametrelerinin ve homojen olmamanın kuvvet fonksiyonu şeklinde değişiminin kritik yanal basınç yükü değerine etkileri incelenmiştir. Elde edilen ifadeler üzerine yapılan sayısal sonuçlar kaynaklardaki sonuçlarla karşılaştırılarak doğruluğu saptanmıştır.In this study, stability of a non-homogeneous elastic truncated conical shell under non-uniform lateral pressure is studied. Firstly, fundamental relations of conical shells made of nonhomogeneous elastic materials are expressed and modified Donnell type stability and compatibility equations are obtained. Then, applying Galerkin method to these equations, an analytical expression for non-uniform lateral pressure is get. Minimizing the obtained expression according to the circumferential wave number, minimum value of the non-uniform critical lateral pressure is found. Finally, making computations, the effects of the variations of conical shell parameters and non-homogeneity as power functions to the critical lateral pressure values are examined. Obtained results are compared with those in the literature and the validity of the study is established

Use of Excessive Physical Force against an Inmate May Constitute Cruel and Unusual Punishment Even Though the Prisoner Does Not Suffer Significant Injury.

In Hudson v. McMillian, the Supreme Court held that use of excessive physical force against an inmate may constitute cruel and unusual punishment even though the prisoner does not suffer any significant injury. The Eighth Amendment has evolved significantly since its adoption in 1791, becoming a complex line of authority which over time expanded the rights of criminals and convicts. Recent cases have attempted to mold the varying Eight Amendment standards into a more cohesive legal doctrine. These efforts were meant to clarify the doctrine of cruel and unusual punishments; however, the divergent interpretations of these decisions rendered Eighth Amendment jurisprudence far from clear. The Court faced with these divergent standards in Hudson held the extent of an inmate’s injury would be only one of many factors to consider in determining Eighth Amendment violations. The core inquiry is the subjective determination of good faith application of force, differentiating past holdings using the deliberate indifference standard. While the Court concluded that prisoners need no significant injury to invoke Eighth Amendment protections, the subjective standard will increase the difficulty prisoners face in bringing suit. In attempting to clarify the confusing standards, Hudson merely adds to the chaos. Although both the majority and the dissenting opinions contain faults, both also contain valuable concepts. Perhaps a combination of these ideas can be greater than the sum of the separate parts. Fashioning a uniform Eighth Amendment standard is possible by combining the preexisting deliberate indifference model with modifications from the majority in Hudson. This would lower the subjective element from good faith to deliberate indifference while maintaining an inmate’s injury as only a factor requiring consideration in determining Eighth Amendment violations. Because prisoners would be able to recover more easily, cruel and unusual punishments would be discouraged

The Calibration of AVHRR Visible Dual Gain using Meteosat-8 for NOAA-16 to 18

The NOAA AVHRR program has given the remote sensing community over 25 years of imager radiances to retrieve global cloud, vegetation, and aerosol properties. This dataset can be used for long-term climate research, if the AVHRR instrument is well calibrated. Unfortunately, the AVHRR instrument does not have onboard visible calibration and does degrade over time. Vicarious post-launch calibration is necessary to obtain cloud properties that are not biased over time. The recent AVHRR-3 instrument has a dual gain in the visible channels in order to achieve greater radiance resolution in the clear-sky. This has made vicarious calibration of the AVHRR-3 more difficult to unravel. Reference satellite radiances from well-calibrated instruments, usually equipped with solar diffusers, such as MODIS, have been used to successfully vicariously calibrate other visible instruments. Transfer of calibration from one satellite to another using co-angled, collocated, coincident radiances has been well validated. Terra or Aqua MODIS and AVHRR comparisons can only be performed over the poles during summer. However, geostationary satellites offer a transfer medium that captures both parts of the dual gain. This AVHRR-3 calibration strategy uses, calibrated with MODIS, Meteosat-8 radiances simultaneously to determine the dual gains using 50km regions. The dual gain coefficients will be compared with the nominal coefficients. Results will be shown for all visible channels for NOAA-17

Buckling behavior of multilayer cylindrical shells composed of functionally graded nanocomposite layers under lateral pressure in thermal environments

In this study, the stability behavior of multilayer cylindrical shells made of functionally graded nanocomposite layers (FG-NCLs) subjected to the lateral pressure in thermal environments is investigated. It is postulated that nanocomposite layers forming layered cylindrical shells are made of single-walled carbon nanotube (SWCNT)-reinforced polymers that have four types of profiles based on the uniform and linear distributions of mechanical properties. The material properties of SWCNTs are assumed to be dependent on location as well as temperature and are obtained from molecular dynamics simulations. The governing equations are derived as partial differential equations within shear deformation theory (SDT) and solved in a closed form, using the Galerkin procedure, to determine the lateral critical pressure (LCP) in thermal environments. The numerical representations relate to the buckling behavior of multilayer cylindrical shells made of functionally graded nanocomposite layers under the uniform lateral pressure for different CNT patterns and temperatures within SDT and Kirchhoff-Love theory (KLT)

Access to Care, Reporting Behaviors, and Quality of Athletic Training Service Interactions for Reserve Officers\u27 Training Corps cadets

Purpose: Reserve Officers’ Training Corps (ROTC) programs prepare student-civilians to become leaders through strenuous physical and leadership training. Unlike their student-athlete counterparts who have direct access to athletic training services, ROTC cadets may or may not have a healthcare provider available. The purpose of this study was to examine the access to care and reporting behaviors of ROTC cadets with a secondary aim exploring the quality of healthcare service interactions relative to patient-centered care. Methods: An online survey assessed access to care using a self-report tool on the type of medical providers available to the ROTC cadets (n=132, age=20±3 y) dispersed between the Army, Navy, Air Force, and Marines, and their illness/injury history and reporting behaviors. The participants who sought care for an injury/illness also completed the Consultation and Relational Empathy tool to measure the level of patient-centered care by the healthcare provider with follow-up analysis using the Consultation Care Measure tool for all athletic training service interactions. Data were analyzed using descriptive statistics. Results: ROTC cadets reported access to 2±1 healthcare providers including a designated civilian physician (26.5%), athletic trainer (23.5%), and ROTC peer first responder (14.4%). However, 50.8% of respondents stated they were unsure what healthcare providers were available. In total, 22.7% of cadets reported being injured and 26.5% reported being sick/ill while participating in ROTC activities. Of those who stated they had sustained an injury during ROTC, 59.9% seldomly or never reported their injury. The ROTC cadets who sought healthcare expressed they were satisfied with their injury (35.96±10.60) and illness (35.48±13.10) treatment from a patient-centered viewpoint. Conclusions: The ROTC cadets reported a general unfamiliarity with the healthcare providers available to them. Despite the reporting behaviors, the cadets reported being satisfied with the care they received

South African Menopause Society revised consensus position statement on menopausal hormone therapy

The South African Menopause Society (SAMS) consensus position statement on menopausal hormone therapy (HT) 2014 is a revision of the SAMS Council consensus statement on menopausal HT published in the SAMJ in May 2007. Information presented in the previous statement has been re-evaluated and new evidence has been incorporated. While the recommendations pertaining to HT remain similar to those in the previous statement, the 2014 revision includes a wider range of clinical benefits for HT, the inclusion of non-hormonal alternatives such as selective serotonin reuptake inhibitors and serotonin noradrenaline reuptake inhibitors for the management of vasomotor symptoms, and an appraisal of bioidentical hormones and complementary medicines used for treatment of menopausal symptoms. New preparations that are likely to be more commonly used in the future are also mentioned. The revised statement emphasises that commencing HT during the 'therapeutic window of opportunity' maximises the benefit-to-risk profile of therapy in symptomatic menopausal women

Near-Real Time Cloud Retrievals from Operational and Research Meteorological Satellites

A set of cloud retrieval algorithms developed for CERES and applied to MODIS data have been adapted to analyze other satellite imager data in near-real time. The cloud products, including single-layer cloud amount, top and base height, optical depth, phase, effective particle size, and liquid and ice water paths, are being retrieved from GOES- 10/11/12, MTSAT-1R, FY-2C, and Meteosat imager data as well as from MODIS. A comprehensive system to normalize the calibrations to MODIS has been implemented to maximize consistency in the products across platforms. Estimates of surface and top-of-atmosphere broadband radiative fluxes are also provided. Multilayered cloud properties are retrieved from GOES-12, Meteosat, and MODIS data. Native pixel resolution analyses are performed over selected domains, while reduced sampling is used for full-disk retrievals. Tools have been developed for matching the pixel-level results with instrumented surface sites and active sensor satellites. The calibrations, methods, examples of the products, and comparisons with the ICESat GLAS lidar are discussed. These products are currently being used for aircraft icing diagnoses, numerical weather modeling assimilation, and atmospheric radiation research and have potential for use in many other applications

A finer grained approach to psychological capital and work performance

Purpose Psychological capital is a set of personal resources comprised by hope, efficacy, optimism, and resilience, which previous research has supported as being valuable for general work performance. However, in today’s organizations, a multidimensional approach is required to understanding work performance, thus, we aimed to determine whether psychological capital improves proficiency, adaptivity, and proactivity, and also whether hope, efficiency, resilience, and optimism have a differential contribution to the same outcomes. Analyzing the temporal meaning of each psychological capital dimension, this paper theorizes the relative weights of psychological capital dimensions on proficiency, adaptivity, and proactivity, proposing also that higher relative weight dimensions are helpful to cope with job demands and perform well. Methodology Two survey studies, the first based on cross-sectional data and the second on two waves of data, were conducted with employees from diverse organizations, who provided measures of their psychological capital, work performance, and job demands. Data was modeled with regression analysis together with relative weights analysis. Findings Relative weights for dimensions of psychological capital were supported as having remarkable unique contributions for proficient, adaptive, and proactive behavior, particularly when job demands were high. Originality/Value We concluded that organizations facing high job demands should implement actions to enhance psychological capital dimensions; however, those actions should focus on the specific criterion of performance of interest