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https://www.readbyqxmd.com/read/29745520/-research-on-classification-of-brain-functional-network-features-during-mental-fatigue
#1
Shuo Yang, Na Ai, Lei Wang, Ying Zhang, Guizhi Xu
This study is aimed to investigate objective indicators of mental fatigue evaluation to improve the accuracy of mental fatigue evaluation. Mental fatigue was induced by a sustained cognitive task. The brain functional networks in two states (normal state and mental fatigue state) were constructed based on electroencephalogram (EEG) data. This study used complex network theory to calculate and analyze nodal characteristics parameters (degree, betweenness centrality, clustering coefficient and average path length of node), and served them as the classification features of support vector machine (SVM)...
April 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29683845/adverse-fetal-and-infant-outcomes-among-hiv-infected-women-who-received-either-nnrti-or-pi-based-art-for-pmtct
#2
Rose Masaba, Craig B Borkowf, Sonali Girde, Clement Zeh, Richard Ndivo, Isabella Nyang'au, Kevin Achola, Timothy K Thomas, Shirley Lee Lecher
BACKGROUND: For HIV-infected pregnant and breastfeeding women, antiretroviral therapy (ART) is known to reduce the mother's risk of passing the infection to her child. However, concerns remain about possible associations between various components of different ART regimens and adverse fetal and infant outcomes. As part of a clinical trial in western Kenya for the prevention of mother-to-child transmission (PMTCT) of HIV, pregnant women received one of two different ART regimens. METHODS: The original PMTCT study conducted in Kenya enrolled 522 HIV-infected, ART-naïve pregnant women...
April 19, 2018: AIDS
https://www.readbyqxmd.com/read/29593438/glenohumeral-internal-rotation-deficit-in-throwing-athletes-current-perspectives
#3
REVIEW
Michael B Rose, Thomas Noonan
Glenohumeral internal rotation deficit (GIRD) is an adaptive process in which the throwing shoulder experiences a loss of internal rotation (IR). GIRD has most commonly been defined by a loss of >20° of IR compared to the contralateral shoulder. Total rotational motion of the shoulder is the sum of internal and external rotation and may be more important than the absolute value of IR loss. Pathologic GIRD has been defined as a loss of IR combined with a loss of total rotational motion. The leading pathologic process in GIRD is posterior capsular and rotator-cuff tightness, due to the repetitive cocking that occurs with the overhead throwing motion...
2018: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29397957/a-novel-dual-closed-loop-control-scheme-based-on-repetitive-control-for-grid-connected-inverters-with-an-lcl-filter
#4
Yun-Guang Gao, Fa-Yang Jiang, Jian-Cheng Song, Li-Jun Zheng, Fei-Yan Tian, Pu-Long Geng
Grid-connected inverters with LCL filters need high steady-state control accuracy, fast dynamic response performance, and strong robustness to guarantee the power quality. However, there are many problems in traditional control strategies that restrict improvements to control system performance, such as poor dynamic performance of traditional single-repetitive control, large ripples, low steady-state accuracy of inverter current feedback based repetitive dual-loop control or grid-current feedback based single-loop proportional-integral control...
March 2018: ISA Transactions
https://www.readbyqxmd.com/read/29381423/glenohumeral-internal-rotation-deficit-and-risk-of-upper-extremity-injury-in-overhead-athletes-a-meta-analysis-and-systematic-review
#5
REVIEW
Robert A Keller, Anthony F De Giacomo, Julie A Neumann, Orr Limpisvasti, James E Tibone
CONTEXT: Current perception dictates that glenohumeral internal rotation deficit (GIRD) is a chronic adaptation that leads to an increased risk of pathologic conditions in the dominant shoulder or elbow of overhead athletes. OBJECTIVE: To determine whether adaptations in glenohumeral range of motion in overhead athletes lead to injuries of the upper extremity, specifically in the shoulder or elbow. DATA SOURCES: An electronic database search was performed using Medline, Embase, and SportDiscus from 1950 to 2016...
March 2018: Sports Health
https://www.readbyqxmd.com/read/29241660/effects-of-glenohumeral-internal-rotation-deficit-on-baseball-pitching-among-pitchers-of-different-ages
#6
Paul Pei-Hsi Chou, You-Li Chou, Yan-Sheng Wang, Rong-Tyai Wang, Hwai-Ting Lin
BACKGROUND: Previous studies have reported that glenohumeral internal rotation deficit (GIRD) may increase the risk of shoulder injury. However, the effects of GIRD on baseball pitching among pitchers of different age groups are still unclear. METHODS: The study participants were 24 high school and 24 university pitchers. For each age group, the pitchers were evenly divided into a GIRD group and a normal group. The pitching motion of each participant was captured using a motion analysis system at a sampling frequency of 300 Hz...
April 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28750979/acute-effects-of-self-myofascial-release-and-stretching-in-overhead-athletes-with-gird
#7
Ryan R Fairall, Lee Cabell, Richard J Boergers, Fortunato Battaglia
OBJECTIVE: To examine the acute effects of self-myofascial release (SMR), static stretching (SS), and the combination of self-myofascial release and static stretching (SMR + SS) on glenohumeral internal rotation range of motion (GH IR ROM) in overhead athletes with glenohumeral internal rotation deficit (GIRD). PARTICIPANTS: Twelve asymptomatic adult male amateur softball position players exhibiting GIRD. RESULTS: All three methods significantly improved GH IR ROM...
July 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28380917/blazed-wire-grid-polarizer-for-plasmon-enhanced-polarization-extinction-design-and-analysis
#8
Changhun Lee, Eunji Sim, Donghyun Kim
We explore plasmon-enhanced wire-gird polarizers (WGPs) to achieve improved polarimetric performance with more relaxed fabrication parameters compared to conventional WGP. A WGP designed with a blazed wire-grid profile was considered for plasmonic enhancement. The results show that a blazed WGP can achieve extremely high polarimetric extinction at a longer wire-grid period (Λ) compared to conventional WGP structure. Under the optimum geometrical parameters, a blazed WGP may attain an extinction ratio of over 40 dB at Λ = 800 nm, which may allow photolithography for fabrication...
April 3, 2017: Optics Express
https://www.readbyqxmd.com/read/28302800/u-k-scientists-gird-for-future-break-with-eu
#9
Erik Stokstad
No abstract text is available yet for this article.
March 17, 2017: Science
https://www.readbyqxmd.com/read/28197845/correlation-of-adherence-by-pill-count-self-report-mems-and-plasma-drug-levels-to-treatment-response-among-women-receiving-arv-therapy-for-pmtct-in-kenya
#10
Victor Mudhune, Roman Gvetadze, Sonali Girde, Richard Ndivo, Frank Angira, Clement Zeh, Timothy Thomas, Shirley Lee Lecher
Success of antiretroviral therapy depends on adherence to effective treatment. We evaluated four adherence methods and their correlation with immunological and virologic response among women receiving PMTCT. Univariable and multivariable analyses were used to assess how adherence by pill count (n = 463), self-report (n = 463), MEMS (n = 129) and plasma drug level (n = 89) was associated with viral load suppression within a 6 months period. Longitudinal analysis was performed to determine the correlation of CD4 cell count with each measure of adherence...
March 2018: AIDS and Behavior
https://www.readbyqxmd.com/read/28008853/ric-8a-a-g-protein-chaperone-with-nucleotide-exchange-activity-induces-long-range-secondary-structure-changes-in-g%C3%AE
#11
Ravi Kant, Baisen Zeng, Celestine J Thomas, Brian Bothner, Stephen R Sprang
Cytosolic Ric-8A has guanine nucleotide exchange factor (GEF) activity and is a chaperone for several classes of heterotrimeric G protein α subunits in vertebrates. Using Hydrogen-Deuterium Exchange-Mass Spectrometry (HDX-MS) we show that Ric-8A disrupts the secondary structure of the Gα Ras-like domain that girds the guanine nucleotide-binding site, and destabilizes the interface between the Gαi1 Ras and helical domains, allowing domain separation and nucleotide release. These changes are largely reversed upon binding GTP and dissociation of Ric-8A...
December 23, 2016: ELife
https://www.readbyqxmd.com/read/27872898/the-impact-of-variable-wind-shear-coefficients-on-risk-reduction-of-wind-energy-projects
#12
Kenneth W Corscadden, Allan Thomson, Behrang Yoonesi, Josiah McNutt
Estimation of wind speed at proposed hub heights is typically achieved using a wind shear exponent or wind shear coefficient (WSC), variation in wind speed as a function of height. The WSC is subject to temporal variation at low and high frequencies, ranging from diurnal and seasonal variations to disturbance caused by weather patterns; however, in many cases, it is assumed that the WSC remains constant. This assumption creates significant error in resource assessment, increasing uncertainty in projects and potentially significantly impacting the ability to control gird connected wind generators...
2016: International Scholarly Research Notices
https://www.readbyqxmd.com/read/27867545/an-evaluation-study-of-research-efficiency-of-the-guangzhou-institute-of-respiratory-diseases-based-on-malmquist-index
#13
Jian-Feng Liao, Juan Wang, Liang Liang, Yong-Ding Wu, Mei-Juan Huang, Tian-Qiang Liu, Lin Zhou, Xin-Wang Wang
BACKGROUND: This study aimed to analyze the dynamic changes of the scientific research innovation efficiency of Guangzhou Institute of Respiratory Diseases (GIRD) during the year 2009-2013 to explore the reason for these changes and give some suggestions on how to improve the overall efficiency of the Institute. METHODS: The panel data used in this study were taken from 19 research teams of GIRD during 2009 to 2013. Data envelopment analysis (DEA) based on Malmquist index (MI) was used to analyze the performance of each research team in terms of productivity changes over time...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27766274/the-relationship-between-humeral-retrotorsion-and-shoulder-range-of-motion-in-baseball-players-with-an-ulnar-collateral-ligament-tear
#14
Bobby Jean S Lee, J Craig Garrison, John E Conway, Kalyssa Pollard, Subhash Aryal
BACKGROUND: Humeral retrotorsion has been investigated in relation to shoulder range of motion (ROM) in healthy baseball players. Currently, there is limited information on the osseous anatomy and development of ulnar collateral ligament (UCL) tears. PURPOSE: To determine the relationship between humeral retrotorsion and shoulder ROM in baseball players with a UCL tear. STUDY DESIGN: Cross-sectional study; Level of evidence, 3. METHODS: Fifty-four baseball players (mean age, 18...
October 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27739388/parent-child-relationship-quality-and-family-transmission-of-parent-posttraumatic-stress-disorder-symptoms-and-child-externalizing-and-internalizing-symptoms-following-fathers-exposure-to-combat-trauma
#15
James Snyder, Abigail Gewirtz, Lynn Schrepferman, Suzanne R Gird, Jamie Quattlebaum, Michael R Pauldine, Katie Elish, Osnat Zamir, Charles Hayes
Transactional cascades among child internalizing and externalizing symptoms, and fathers' and mothers' posttraumatic stress disorder (PTSD) symptoms were examined in a sample of families with a male parent who had been deployed to recent military conflicts in the Middle East. The role of parents' positive engagement and coercive interaction with their child, and family members' emotion regulation were tested as processes linking cascades of parent and child symptoms. A subsample of 183 families with deployed fathers and nondeployed mothers and their 4- to 13-year-old children who participated in a randomized control trial intervention (After Deployment: Adaptive Parenting Tools) were assessed at baseline prior to intervention, and at 12 and 24 months after baseline, using parent reports of their own and their child's symptoms...
November 2016: Development and Psychopathology
https://www.readbyqxmd.com/read/27659068/the-volleyball-athlete-s-shoulder-biomechanical-adaptations-and-injury-associations
#16
REVIEW
Dimitrios Challoumas, Antonio Stavrou, Georgios Dimitrakakis
In volleyball, the dominant shoulder of the athlete undergoes biomechanical and morphological adaptations; however, definitive conclusions about their exact nature, aetiology, purpose and associations with shoulder injury have not been reached. We present a systematic review of the existing literature describing biomechanical adaptations in the dominant shoulders of volleyball players and factors that may predispose to shoulder pain/injury. A thorough literature search via Medline, EMBASE and SCOPUS was conducted for original studies of volleyball players and 15 eligible articles were identified...
June 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/27632891/effectiveness-of-stretching-on-posterior-shoulder-tightness-and-glenohumeral-internal-rotation-deficit-a-systematic-review-of-randomized-controlled-trials
#17
REVIEW
Koya Mine, Takashi Nakayama, Steve Milanese, Karen Grimmer
CONTEXT: Posterior shoulder tightness (PST) and glenohumeral internal-rotation deficit (GIRD) can contribute to shoulder pain suffered by athletes engaged in overhead sporting activities. Stretching is a common intervention to resolve PST and GIRD, but it has weak evidence of effectiveness to date. OBJECTIVE: This systematic review aimed to collect and synthesize effectiveness data from English- and Japanese-language randomized controlled trials (RCTs) investigating stretching interventions for PST and GIRD...
July 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27013981/the-art-of-grid-fields-geometry-of-neuronal-time
#18
Andrey L Shilnikov, Andrew Porter Maurer
The discovery of grid cells in the entorhinal cortex has both elucidated our understanding of spatial representations in the brain, and germinated a large number of theoretical models regarding the mechanisms of these cells' striking spatial firing characteristics. These models cross multiple neurobiological levels that include intrinsic membrane resonance, dendritic integration, after hyperpolarization characteristics and attractor dynamics. Despite the breadth of the models, to our knowledge, parallels can be drawn between grid fields and other temporal dynamics observed in nature, much of which was described by Art Winfree and colleagues long before the initial description of grid fields...
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/26983458/trends-in-the-presentation-management-and-outcomes-of-little-league-shoulder
#19
Benton E Heyworth, Dennis E Kramer, Daniel J Martin, Lyle J Micheli, Mininder S Kocher, Donald S Bae
BACKGROUND: With rising participation in youth sports such as baseball, proximal humeral epiphysiolysis, or Little League shoulder (LLS), is being seen with increasing frequency. However, there remains a paucity of literature regarding the causes, natural history, or treatment outcomes of LLS. PURPOSE: To analyze the demographic, clinical, and diagnostic features of a population of LLS patients, with an emphasis on identifying underlying risk factors for the development and recurrence of LLS after nonoperative treatment...
June 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26955903/relation-between-glenohumeral-internal-rotation-deficit-and-valgus-laxity-of-the-elbow-in-high-school-baseball-pitchers
#20
Tsuyoshi Tajika, Tsutomu Kobayashi, Atsushi Yamamoto, Hitoshi Shitara, Tsuyoshi Ichinose, Daisuke Shimoyama, Noboru Oya, Tsuyoshi Sasaki, Kenji Takagishi
BACKGROUND: There are few literatures describing the association between glenohumeral internal rotation deficits (GIRD) and valgus laxity of the elbow on the throwing side of high school pitchers with and without a history of elbow symptom. METHODS: The passive range of motion of glenohumeral internal and external rotation on bilateral side shoulders was measured in 75 high-school baseball pitchers during the preseason. Using ultrasonography, the width of the ulnohumeral joint of the elbow was measured at 30° of flexion, both at rest and with valgus stress in the pitching side...
March 2017: Journal of Sports Medicine and Physical Fitness
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