MODELING AND ANALYSIS OF DEFORMATION ON A FLEXURE BEARING IN LINEAR COMPRESSOR

Flexure bearing is a new concept and used for precision applications such as Programmable Focusing Mechanism (PFM), linear compressor, etc. These bearings are compact and inexpensive. A flexure bearing is designed for specific applications. These designed can usually be done with the advanced design tool like Fine Element Analysis. With the advent of computers Fine Element Analysis has become the most suitable tool for the engineering analysis where the conventional approach is not suitable, geometric complexity are involved etc. This bearing contains three slots having 120 ° apart and 12 peripheral holes are used to clamp the disc rigidly onto a support structure. One central hole made for movement of shaft. The bearings are commonly made by Aluminum material we calculate the deformations in theoretical and FEA method by using Ansys Software. In this paper we are modeling the flexure bearing by using copper material we are calculate the deformations in theoretical and FEA method by using Ansys Software. We are analysis the deflection deformation on the both materials of bearing. We are analysis the deflection deformation on Flexure Bearing at different load (means 1 N to 5 N). Using software’s like CATIA and PROE, modeling of flexure bearing done. Also make Fine Element Method analysis on it by using Ansys software and lastly, this project considers the fatigue life criteria for flexure bearing and tries to optimize it. We are made design calculation and Fine Element Analysis for flexure bearing to make appropriate model and draw the performance charts for linear compressor bearing by comparing the power consumption with different temperatures, and capacity

Prevention of endotoxin-induced uveitis in rabbits by Triphala, an Ayurvedic formulation

Purpose: Triphala (TA) is an Ayurvedic formulation used to treat various disorders. The present study was designed to investigate the anti-inflammatory effect of TA aqueous extract on experimental uveitis in the rabbit. Methods: Anterior uveitis was induced in rabbits by intravitreal injection of lipopolysaccharide from Eschericha coli after pretreatment with TA aqueous extract. Subsequently the anti-inflammatory activity of TA was evaluated by grading the clinical signs and estimating the inflammatory cell count, protein, and TNF-α level in the aqueous humour. Results: The anterior segment inflammation in the control group was significantly higher than in TA and prednisolone treated groups, as observed by clinical grading. The inflammatory cell count in the control group was 31.23 ± 0.80 × 105cells/ml, whereas it was 3.29 ± 0.47 × 105cells/ml (P < 0.0001 vs. control) and 1.31 ± 0.31 × 105 (P < 0.0001 vs. control) cells/ml in the TA and prednisolone treated groups, respectively. The protein content of the aqueous humour was 15.43 ± 0.54, 3.13 ± 0.35 (P < 0.0001 vs. control), and 1.96 ± 0.39 (P < 0.0001 vs. control) mg/ml in the control, TA and prednisolone treated groups respectively. The aqueous TNF- α level in the control group was 942.20 ± 6.46 pg/ml and was 261.30 ± 13.60 (P < 0.001 vs. control) and 104.00 ± 4.50 (P < 0.0001 vs. control) pg/ml in the TA and prednisolone treated groups, respectively. \ud Conclusions: Topical administration of aqueous extract of TA prevented uveitis in endotoxin-induced experimental rabbits.\u

Intrapartum Pubic Symphysis Disruption

During pregnancy, high progesterone and relaxin levels produce physiological ligament relaxation on the pelvis. Therefore, moderate pubic symphysis and sacroiliac joints relaxing provide birth canal widening, thereby facilitating vaginal delivery. Sometimes, functional pain or pelvic instability may occur during pregnancy or puerperium, which is defined as symptomatic pelvic girdle relaxation. In rare cases, a pubic symphysis disruption can occur during the labor, causing severe pain and functional limitations. The early recognition of this injury is crucial to prevent complications and improve clinical and functional outcomes. This study reports an acute symphyseal disruption resulting from childbirth in a primiparous patient who underwent open reduction and internal fixation with plate and screws. After a 6 months follow‑up, the patient presented no pain and satisfactory functional recovery.Keywords: Pelvis, Pelvis fracture, Pregnancy, Pubic symphysis, Pubic symphysis diastasi

Non-quasiparticle states in the core level spectra of ferromagnetic semiconductors and half-metallic ferromagnets

The Green's functions that determine x-ray spectra are calculated in the s-d exchange model of a saturated conducting ferromagnet in the presence of the core hole. A possibility to observe non-quasiparticle (NQP) states in the core level (x-ray absorption, emission and photoelectron) spectroscopy is demonstrated. It is shown that NQP contributions to resonant x-ray scattering spectra can be considerably enhanced by core hole effects in comparison with those to the density of states.Comment: 13 pages, 7 figures, final versio

A esfera imersiva – uma narrativa expandida

Trabalho de projetoA importância de preservar o meio ambiente tem-se tornado cada vez mais uma realidade crescente na nossa sociedade. Na mesma proporção cresce, a necessidade de educar e sensibilizar as pessoas para esta realidade. Para captar a atenção e tocar as pessoas, no sentido de perceberem o quanto é importante que todos comecemos a dar o nosso contributo para um mundo menos poluído, um meio ambiente melhor, é preciso inovar! Para inovar, é preciso pensar e criar uma forma de mobilizar as pessoas, que de alguma maneira vejam e sintam a mensagem que queremos passar, só assim conseguimos despertar a atenção e a tal preocupação pretendida. Neste contexto, este projeto tem como objetivo sensibilizar o espectador e despertar nele a preocupação para a proteção do meio ambiente, para isso desenvolveuse uma animação com recurso à projeção video mapping. Onde foram realizados processos de modelação 3D, rigging, texturização, animação 3D, render, edição de vídeo e video mapping. Na primeira fase do trabalho sobre a ideia da preocupação ecológica, procuramos aprofundar o tema, analisando estudos já realizados sobre o mesmo. Procuramos orientações sobre aquilo que tem vindo a ser estudado sobre o assunto, e a forma como têm sido desenvolvidas essas investigações. Centramos a nossa pesquisa, na atualidade de informação do estado do meio ambiente, e nas atitudes para evitar tomar a poluição. Têm vindo a ser desenvolvido várias formas de incutir esta informação às pessoas e, é com base nessa informação que criamos as referências, bases de estudo e orientações que precisávamos, para dar seguimento ao nosso trabalho. O projeto está dividido em quatro partes essenciais: A introdução, onde apresentamos o tema em estudo e os seus objetivos. O estado da arte, onde expomos todas as pesquisas que foram feitas, demonstrando assim qual foi a base do nosso estudo, as referências que tivemos para definir o caminho a seguir ao longo do projeto. O desenvolvimento, onde vamos expor o que fizemos e como fizemos, detalhadamente. E por último a conclusão, onde declaramos todas as ilações que derivaram do desenvolvimento do projeto e perspetivas futuras. Deste estudo resultou uma animação 3D com projeção video mapping, que tem como foco principal, sensibilizar, e despertar a preocupação das pessoas para a importância de proteger o meio ambiente, adotando boas práticas comportamentais.The importance of preserving the environment has increasingly become a growing reality in our society. In the same proportion, the need to educate and sensitize people to this reality grows. In order to attract attention and touch people, maing them realizing how important it is to start giving our contribution to a less polluted world, a better environment, we need to innovate! It is necessary to think and create a way of mobilizing people, who somehow see and feel the main message, only this way we can attract attention and the intended concern. The project aims to sensitize the viewer and awaken in him to the concern for the protection of the environment. The main developing was focused in an, animation that uses video mapping projection using: 3D modeling, rigging, texturing, 3D animation, rendering and video editing. In the first phase of the work, we sought to deepen the theme, analyzing studies already carried out. We look for guidance on what has been studied on the subject, and how these investigations have been developed. We also focus our research on the current state of information and environment and avoiding pollution. The project is divided into four essential parts: The introduction, where we present the topic under study and its objectives: the state of the art, where we expose all the research that was done, thus demonstrating what was the basis of our study, the references we had to define the path to follow throughout the project; development, where we reveal the details on what and how it was done. Finally, the conclusion, where we declare all the lessons that derived from the development of the project and future perspectives. This study resulted in a 3D animation with video mapping projection, whose main focus is to raise awareness and raise people's concerns about the importance of protecting the environment and adopting good behavioral practices

A systematic review highlighting poor quality of evidence for content validity of quality of life instruments in female chronic pelvic pain.

OBJECTIVES: To evaluate the content validity of 19 patient-reported outcome measures (PROMs) used to measure quality of life (QoL) in women with chronic pelvic pain (CPP). STUDY DESIGN AND SETTING: We searched Embase, MEDLINE, PsycINFO databases and Google Scholar from inception to August 2020. We included records describing the development or studies assessing content validity of PROMs. Two reviewers independently assessed the methodological quality of PROMs using the Consensus-based Standards for the Selection of Health Measurement Instruments checklist. Evidence was synthesized for relevance, comprehensiveness, and comprehensibility. Quality of evidence was rated using a modified Grading of Recommendations, Assessment, Development, and Evaluations approach. RESULTS: PROM development was inadequate for all instruments included in this review. No high-quality evidence ratings were found for relevance, comprehensiveness, and comprehensibility. QoL was measured using generic instruments (68.42%, 13/19) rather than those specific to chronic pain (21.04%, 4/19) or pelvic pain (10.53%, 2/19). Quality of concept elicitation was inadequate for 90% of PROMs. Half of PROMs did not include patients in their development and only 40% were devised using a sample representative of the target population for which the PROM was developed. Cognitive interviews were conducted in one-fifth of PROMs and were mostly of inadequate/doubtful quality. CONCLUSION: There is poor quality of evidence for content validity of PROMs used to measure QoL in women with CPP

Berezinskii-Kosterlitz-Thouless Transition in Spin-Charge Separated Superconductor

A model for spin-charge separated superconductivity in two dimensions is introduced where the phases of the spinon and holon order parameters couple gauge-invariantly to a statistical gauge-field representing chiral spin-fluctuations. The model is analyzed in the continuum limit and in the low-temperature limit. In both cases we find that physical electronic phase correlations show a superconducting-normal phase transition of the Berezinskii-Kosterlitz-Thouless type, while statistical gauge-field excitations are found to be strictly gapless. The normal-to-superconductor phase boundary for this model is also obtained as a function of carrier density, where we find that its shape compares favorably with that of the experimentally observed phase diagram for the oxide superconductors.Comment: 35 pages, TeX, CSLA-P-93-

The level of air pollution in the impact zone of coal-fired power plant (Karaganda City) using the data of geochemical snow survey (Republic of Kazakhstan)

Coal-fired power plants emissions impact the air quality and human health. Of great significance is assessment of solid airborne particles emissions from those plants and distance of their transportation. The article presents the results of air pollution assessment in the zone of coal-fired power plant (Karaganda City) using snow survey. Based on the mass of solid airborne particles deposited in snow, time of their deposition on snow at the distance from 0.5 to 4.5 km a value of dust load has been determined. It is stated that very high level of pollution is observed at the distance from 0.5 to 1 km. there is a trend in decrease of dust burden value with the distance from the stacks of coal-fired power plant that may be conditioned by the particle size and washing out smaller ash particles by ice pellets forming at freezing water vapour in stacks of the coal-fired power plant. Study in composition of solid airborne particles deposited in snow has shown that they mainly contain particulates of underburnt coal, Al-Si- rich spheres, Fe-rich spheres, and coal dust. The content of the particles in samples decreases with the distance from the stacks of the coal-fired power plant

Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE)

Background: We compared 24-hour waist-worn accelerometer wear time characteristics of 9-11 year old children in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) to similarly aged U.S. children providing waking-hours waist-worn accelerometer data in the 2003-2006 National Health and Nutrition Examination Survey (NHANES). Methods: Valid cases were defined as having >= 4 days with >= 10 hours of waking wear time in a 24-hour period, including one weekend day. Previously published algorithms for extracting total sleep episode time from 24-hour accelerometer data and for identifying wear time (in both the 24-hour and waking-hours protocols) were applied. The number of valid days obtained and a ratio (percent) of valid cases to the number of participants originally wearing an accelerometer were computed for both ISCOLE and NHANES. Given the two surveys' discrepant sampling designs, wear time (minutes/day, hours/day) from U.S. ISCOLE was compared to NHANES using a meta-analytic approach. Wear time for the 11 additional countries participating in ISCOLE were graphically compared with NHANES. Results: 491 U.S. ISCOLE children (9.92 +/- 0.03 years of age [M +/- SE]) and 586 NHANES children (10.43 +/- 0.04 years of age) were deemed valid cases. The ratio of valid cases to the number of participants originally wearing an accelerometer was 76.7% in U.S. ISCOLE and 62.6% in NHANES. Wear time averaged 1357.0 +/- 4.2 minutes per 24-hour day in ISCOLE. Waking wear time was 884.4 +/- 2.2 minutes/day for U.S. ISCOLE children and 822.6 +/- 4.3 minutes/day in NHANES children (difference = 61.8 minutes/day, p <0.001). Wear time characteristics were consistently higher in all ISCOLE study sites compared to the NHANES protocol. Conclusions: A 24-hour waist-worn accelerometry protocol implemented in U.S. children produced 22.6 out of 24 hours of possible wear time, and 61.8 more minutes/day of waking wear time than a similarly implemented and processed waking wear time waist-worn accelerometry protocol. Consistent results were obtained internationally. The 24-hour protocol may produce an important increase in wear time compliance that also provides an opportunity to study the total sleep episode time separate and distinct from physical activity and sedentary time detected during waking-hours.Peer reviewe

Are Children Like Werewolves? : Full Moon and Its Association with Sleep and Activity Behaviors in an International Sample of Children

In order to verify if the full moon is associated with sleep and activity behaviors, we used a 12-country study providing 33,710 24-h accelerometer recordings of sleep and activity. The present observational, cross-sectional study included 5812 children ages 9-11 years from study sites that represented all inhabited continents and wide ranges of human development (Australia, Brazil, Canada, China, Colombia, Finland, India, Kenya, Portugal, South Africa, United Kingdom, and United States). Three moon phases were used in this analysis: full moon (4 days; reference), half moon (5-9 days), and new moon (+10-14 days) from nearest full moon. Nocturnal sleep duration, moderate -to vigorous physical activity (MVPA), light-intensity physical activity (LPA), and total sedentary time (SED) were monitored over seven consecutive days using a waist -worn accelerometer worn 24 h a day. Only sleep duration was found to significantly differ between moon phases (-5 min/night shorter during full moon compared to new moon). Differences in MVPA, LPA, and SED between moon phases were negligible and non-significant (Peer reviewe