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https://www.readbyqxmd.com/read/28227828/pose-measurement-of-anterior-pelvic-plane-based-on-inertial-measurement-unit-in-total-hip-replacement-surgeries
#1
Zhe Cao, Shaojie Su, Hong Chen, Hao Tang, Yixin Zhou, Zhihua Wang, Zhe Cao, Shaojie Su, Hong Chen, Hao Tang, Yixin Zhou, Zhihua Wang, Zhe Cao, Yixin Zhou, Hong Chen, Zhihua Wang, Hao Tang, Shaojie Su
In Total Hip Replacement (THR), inaccurate measurement of Anterior Pelvic Plane (APP), which is usually used as a reference plane, will lead to malposition of the acetabular prosthesis. As a result, the risk of impingement, dislocation and wear will increase and the safe range of motion will be limited. In order to acquire the accurate pose of APP, a measurement system is designed in this paper, which includes two parts: one is used to estimate the initial pose of APP and the other is used to trail dynamic motion of APP...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227668/mental-stress-grading-based-on-fnirs-signals
#2
Fares Al-Shargie, Tong Boon Tang, Masashi Kiguchi, Fares Al-Shargie, Tong Boon Tang, Masashi Kiguchi, Masashi Kiguchi, Tong Boon Tang, Fares Al-Shargie
In this study, we propose functional near infrared spectroscopy (fNIRS) to objectively grade different levels of mental stress. The levels of stress were set based on the difficulty of arithmetic task, time pressure and negative feedback about peer performance. We examined the proposed approach on twelve human subjects using the Montreal Imaging Stress Task. The experiment results revealed a reduction in cortical activation at prefrontal cortex when stressed, and the differences in hemodynamic response between control condition and under stress were significant for arithmetic difficulty level one, two and three, respectively, (p = 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227438/poly-n-isopropylacrylamide-hydrogel-based-shape-adjustable-polyimide-films-triggered-by-near-human-body-temperature
#3
Huanqing Cui, Xuemin Du, Juan Wang, Tianhong Tang, Tianzhun Wu, Huanqing Cui, Xuemin Du, Juan Wang, Tianhong Tang, Tianzhun Wu, Huanqing Cui, Tianzhun Wu, Xuemin Du, Tianhong Tang, Juan Wang
Hydrogel-based shape-adjustable films were successfully fabricated via grafting poly(N-isopropylacrylamide) (PNIPAM) onto one side of polyimide (PI) films. The prepared PI-g-PNIPAM films exhibited rapid, reversible, and repeatable bending/unbending property by heating to near-human-body temperature (37 °C) or cooling to 25 °C. The excellent property of PI-g-PNIPAM films resulted from a lower critical solution temperature (LCST) of PNIPAM at about 32 °C. Varying the thickness of PNIPAM hydrogel layer regulated the thermo-responsive shape bending degree and response speed of PI-g-PNIPAM films...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227394/principal-component-analysis-of-the-shape-deformations-of-the-hippocampus-in-alzheimer-s-disease
#4
Xiaoying Tang, Jiong Wu, Xiaoying Tang, Jiong Wu, Xiaoying Tang, Jiong Wu
In this paper, we present the principal component analysis (PCA) of shape deformations of bilateral hippocampi in Alzheimer's disease (AD) as derived in the large deformation diffeomorphic metric mapping setting. We investigated the PCA patterns (the scores and loadings) of the bilateral hippocampi for 51 subjects, 28 of which had AD while 23 were normal aging. Student's t-tests were used to select the components displaying significant group difference for a more purposed analysis. Our findings revealed that the head part of the hippocampus in each hemisphere, to be specific the CA1 and subiculum subregions, contributed the most to the significant group differences...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227043/study-of-functional-brain-homogeneity-in-female-patients-with-major-depressive-disorder
#5
X Zhang, Y Tang, Y Zhu, Y Li, S Tong, X Zhang, Y Tang, Y Zhu, Y Li, S Tong, Y Li, Y Zhu, S Tong, X Zhang, Y Tang
Women are at a twofold higher risk of developing major depressive disorder (MDD) than that of men. However, the investigation of female MDD patients functional brain activity is rare and the detailed mechanism remains unclear. The present work is to explore the altered spontaneous neural activity measured with regional homogeneity (ReHo) in female MDD patients using resting-state functional magnetic resonance imaging (fMRI) technique. Twelve MDD females and twelve matched healthy participants were included in the study...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226516/continuous-theta-burst-transcranial-magnetic-stimulation-affects-brain-functional-connectivity
#6
Dan Cao, Yingjie Li, Ling Wei, Yingying Tang, Dan Cao, Yingjie Li, Ling Wei, Yingying Tang, Yingying Tang, Yingjie Li, Ling Wei, Dan Cao
Prefrontal cortex (PFC) plays an important role in the emotional processing as well as in the functional brain network. Hyperactivity in the right dorsolateral prefrontal cortex (DLPFC) would be found in anxious participants. However, it is still unclear what the role of PFC played in a resting functional network. Continuous theta burst transcranial magnetic stimulation (cTBS) is an effective tool to create virtual lesions on brain regions. In this paper, we applied cTBS over right prefrontal area, and investigated the effects of cTBS on the brain activity for functional connectivity by the method of graph theory...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226453/spatial-characterization-of-innervation-zones-under-electrically-elicited-m-wave
#7
C Zhang, Y Peng, S Li, P Zhou, A Munoz, D Tang, Y Zhang, C Zhang, Y Peng, S Li, P Zhou, A Munoz, D Tang, Y Zhang, C Zhang, P Zhou, D Tang, Y Zhang, S Li, A Munoz, Y Peng
The three dimensional (3D) innervation zone (IZ) imaging approach (3DIZI) has been developed in our group to localize the IZ of a particular motor unit (MU) from its motor unit action potentials decomposed from high-density surface electromyography (EMG) recordings. In this study, the developed 3DIZI approach was combined with electrical stimulation to investigate global distributions of IZs in muscles from electrically elicited M-wave recordings. Electrical stimulations were applied to the musculocutaneous nerve to activate supramaximal muscle response of the biceps brachii in one healthy subject, and high-density (128 channels) surface EMG signals of the biceps brachii muscles were recorded...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226391/closed-form-reml-estimators-and-sample-size-determination-for-mixed-effects-models-for-repeated-measures-under-monotone-missingness
#8
Yongqiang Tang
We derive the closed-form restricted maximum likelihood estimator and Kenward-Roger's variance estimator for fixed effects in the mixed effects model for repeated measures (MMRM) when the missing data pattern is monotone. As an important application of the analytic result, we present the formula for calculating the power of treatment comparison using the Wald t-test with the Kenward-Roger adjusted variance estimate in MMRM. It allows adjustment for baseline covariates without the need to specify the covariate distribution in randomized trials...
February 22, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28226317/neuroprotective-effects-of-acetyl-l-carnitine-on-neonatal-hypoxia-ischemia-induced-brain-injury-in-rats
#9
Shiyu Tang, Su Xu, Xin Lu, Rao P Gullapalli, Mary C McKenna, Jaylyn Waddell
Perinatal hypoxia ischemia (HI) is a significant cause of brain injury in surviving infants. Although hypothermia improves outcomes in some infants, additional therapies are needed since about 40% of infants still have a poor outcome. Acetyl-L-carnitine (ALCAR), an acetylated derivative of L-carnitine, protected against early changes in brain metabolites and mitochondrial function after HI on postnatal day (PND) 7 in a rat pup model of near-term HI injury. However, its efficacy in long-term structural and functional outcomes remains unexplored...
February 23, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28226282/systematic-identification-of-flavonols-flavonol-glycosides-triterpene-and-siraitic-acid-glycosides-from-siraitia-grosvenorii-using-high-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-combined-with-a-screening-strategy
#10
Zhi-Xing Qing, Huan Zhao, Qi Tang, Chang-Ming Mo, Peng Huang, Pi Cheng, Peng Yang, Xue-Yi Yang, Xiu-Bin Liu, Ya-Jie Zheng, Jian-Guo Zeng
The fruits of Siraitia grosvenorii are considered to be health-promoting because of the diversity of their bioactive ingredients. In the present study, a screening method, using high-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry (HPLC-Q-TOF-MS) combined with a screening strategy, has been established. The technology was used to systematically screening the targeted metabolites, primarily from the complex matrix of S. grosvenorii. The compounds were then identified by their exact masses and characteristic fragment ions, in comparison with the fragmentation behaviors of 19 references...
February 16, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28226275/short-term-cerebral-activity-alterations-after-surgery-in-patients-with-unilateral-mesial-temporal-lobe-epilepsy-associated-with-hippocampal-sclerosis-a-longitudinal-resting-state-fmri-study
#11
Yingying Tang, Wei Xia, Xiaofeng Yu, Bo Zhou, Chunyan Luo, Xiaoqi Huang, Qin Chen, Qiyong Gong, Dong Zhou
PURPOSE: Mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS), as a brain network disorder, has given increased importance to resective surgery. We aimed to examine the short-term postoperative functional network reorganization in patients with unilateral MTLE-HS using resting-state functional magnetic resonance imaging (Rs-fMRI) data with a longitudinal design. METHOD: Seventeen (10 right-side and 7 left-side) patients with unilateral MTLE-HS were recruited...
January 3, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28225910/products-purchased-from-family-farming-for-school-meals-in-the-cities-of-rio-grande-do-sul
#12
Daniele Ferigollo, Vanessa Ramos Kirsten, Dienifer Heckler, Oscar Agustín Torres Figueredo, Julian Perez-Cassarino, Rozane Márcia Triches
OBJECTIVE: This study aims to verify the adequacy profile of the cities of the State of Rio Grande do Sul, Brazil, in relation to the purchase of products of family farming by the Programa Nacional de Alimentação Escolar (PNAE - National Program of School Meals). METHODS: This is a quantitative descriptive study, with secondary data analysis (public calls-to-bid). The sample consisted of approximately 10% (n = 52) of the cities in the State, establishing a representation by mesoregion and size of the population...
February 16, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28225802/effect-of-various-nitrogen-conditions-on-population-growth-temporary-cysts-and-cellular-biochemical-compositions-of-karenia-mikimotoi
#13
Yan Zhao, Xuexi Tang, Xiaowei Zhao, You Wang
The harmful algal bloom (HAB)-forming dinoflagellate Karenia mikimotoi was exposed to different nitrogen (N) conditions, in order to study the population growth, temporary cyst production and cellular biochemical compositions in laboratory. The results indicated the population growth of K. mikimotoi was inhibited by different levels of N starvation but showed similar fast recovery after the resupplement of N, and temporary cysts were induced in the period of N starvation. K. mikimotoi grew well in inorganic (NO3-, NO2- and NH4+) and organic (urea) nitrogen sources, but the growth parameters (K, Tp, r) showed differences when simulated by Logistic model regressions...
2017: PloS One
https://www.readbyqxmd.com/read/28225668/emergence-of-indigenous-artemisinin-resistant-plasmodium-falciparum-in-africa
#14
Feng Lu, Richard Culleton, Meihua Zhang, Abhinay Ramaprasad, Lorenz von Seidlein, Huayun Zhou, Guoding Zhu, Jianxia Tang, Yaobao Liu, Weiming Wang, Yuanyuan Cao, Sui Xu, Yaping Gu, Julin Li, Chao Zhang, Qi Gao, Didier Menard, Arnab Pain, Haitao Yang, Qingfeng Zhang, Jun Cao
No abstract text is available yet for this article.
February 22, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28225590/quantum-effects-and-phase-tuning-in-epitaxial-hexagonal-and-monoclinic-mote2-monolayers
#15
Jinglei Chen, Guanyong Wang, Yanan Tang, Hao Tian, Jinpeng Xu, Xianqi Dai, Hu Xu, Jinfeng Jia, Wingkin Ho, Maohai Xie
Monolayer (ML) transition-metal dichalcogenides exist in different phases, such as hexagonal (2H) and monoclinic (1T') structures. They show very different properties: semiconducting for 2H-MoTe2 and semi-metallic for 1T'-MoTe2. The formation energy difference between 2H and 1T' phase MoTe2 is small, so there is a high chance to tune the structures of MoTe2 and thereby to bring in applications of phase-change electronics. In this paper, we report growth of both 2H- and 1T'-MoTe2 ML by molecular-beam epitaxy (MBE) and demonstrate its tenability by changing the conditions of MBE...
February 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28225585/two-step-process-to-create-roll-off-superamphiphobic-paper-surfaces
#16
Lu Jiang, Zhenguan Tang, Rahmat M Clinton, Victor Breedveld, Dennis W Hess
Surface modification of cellulose-based paper which displays roll-off properties for water and oils (surface tension ≥ 23.8 mN·m-1) and good repellency towards n-heptane (20.1 mN·m-1) is reported. Droplets of water, diiodomethane, motor oil, hexadecane and decane all "bead up", i.e. exhibit high contact angles, and roll off the treated surface under the influence of gravity. Unlike widely used approaches that rely on the deposition of nanoparticles or electrospun nanofibers to create superamphiphobic surfaces, our method generates a hierarchical structure as an inherent property of the substrate and displays good adhesion between the film and substrate...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28225483/homocysteine-and-all-cause-mortality-in-hypertensive-adults-without-pre-existing-cardiovascular-conditions-effect-modification-by-mthfr-c677t-polymorphism
#17
Benjamin Xu, Xiangyi Kong, Richard Xu, Yun Song, Lishun Liu, Ziyi Zhou, Rui Gu, Xiuli Shi, Min Zhao, Xiao Huang, Mingli He, Jia Fu, Yefeng Cai, Ping Li, Xiaoshu Cheng, Changyan Wu, Fang Chen, Yan Zhang, Genfu Tang, Xianhui Qin, Binyan Wang, Hao Xue, Yundai Chen, Ye Tian, Ningling Sun, Yimin Cui, Fan Fan Hou, Jianping Li, Yong Huo
BACKGROUND: Previous studies support an association between elevated total homocysteine (tHcy) levels and increased all-cause mortality. However, few prospective studies have examined this association in hypertensive patients, and/or tested any effect modification by the methylene tetrahydrofolate reductase (MTHFR) C677T genotype. METHODS: This was a post hoc analysis of the China Stroke Primary Prevention Trial. Serum tHcy and folate were measured at baseline. Individual MTHFR C677T genotype (CC, CT, and TT) was determined...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28225480/nmda-receptor-subunit-and-camkii-changes-in-rat-hippocampus-by-congenital-hcmv-infection-a-mechanism-for-learning-and-memory-impairment
#18
De Wu, Li Yang, Xiaosong Bu, Jiulai Tang, Xiaocheng Fan
The aim of this study was to investigate the effects of congenital human cytomegalovirus infection on the expression levels of N-methyl-D-aspartate receptors (NRs) and Ca/calmodulin-dependent protein kinase II (CaMKII) in the hippocampal neurons of neonatal Sprague-Dawley (SD) rats. Pregnant SD rats were divided into an experimental group and a control group (n=10 in each group). Spatial learning and memory of the offspring of SD rats were evaluated using the Morris water-maze test. Pathological studies of hippocampus sections were carried out...
February 20, 2017: Neuroreport
https://www.readbyqxmd.com/read/28225285/multi-scale-modeling-of-the-effects-of-salt-and-perfume-raw-materials-on-the-rheological-properties-of-commercial-thread-like-micellar-solutions
#19
Xueming Tang, Weizhong Zou, Peter H Koenig, Shawn D McConaughy, Michael R Weaver, David Michael Eike, Michael J Schmidt, Ronald G Larson
We link micellar structures to rheological properties for two surfactant body-wash formulations at various concentrations of salts and perfume raw materials (PRMs) using molecular simulations and micellar-scale modeling as well as traditional surfactant packing arguments. The two body washes, named BW-1EO and BW-3EO, are composed of sodium lauryl ethylene glycol ether sulfate (SLEnS, where n is the average number of ethylene glycol repeat units), cocamidopropyl betaine (CAPB), ACCORD (which is a mixture of six PRMs), and NaCl salt...
February 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28225267/efficient-enantioselective-syntheses-of-dalesconol-a-and-b
#20
Guoqing Zhao, Guangqing Xu, Chao Qian, Wenjun Tang
We herein report the first enantioselective syntheses of immunosuppressants (+)-dalesconol A and B in a highly efficient and concise manner, which features an efficient palladium-catalyzed enantioselective dearomative cyclization-kinetic resolution cascade to install the chiral all-carbon quaternary center, an effective sterically hindered Stille coupling, a powerful DDQ oxidation to furnish all requisite unsaturation, and a tandem hydrolysis-ring closure sequence.
February 22, 2017: Journal of the American Chemical Society
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