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https://www.readbyqxmd.com/read/28646708/piezoelectric-parametric-effects-on-wave-vibration-and-contact-mechanics-of-traveling-wave-ultrasonic-motor
#1
Dongsheng Zhang, Shiyu Wang, Jie Xiu
Elastic wave quality determines the operating performance of traveling wave ultrasonic motor (TWUM). The time-variant circumferential force from the shrink of piezoelectric ceramic is one of the factors that distort the elastic wave. The distorted waveshape deviates from the ideal standard sinusoidal fashion and affects the contact mechanics and driving performance. An analytical dynamic model of ring ultrasonic motor is developed. Based on this model, the piezoelectric parametric effects on the wave distortion and contact mechanics are examined...
May 25, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28646574/a-novel-habitat-based-approach-to-predict-impacts-of-marine-protected-areas-on-fishers
#2
João B Teixeira, Rodrigo L Moura, Morena Mills, Carissa Klein, Christopher J Brown, Vanessa M Adams, Hedley Grantham, Matthew Watts, Deborah Faria, Gilberto M Amado-Filho, Alex C Bastos, Reinaldo Lourival, Hugh P Possingham
While marine protected areas (MPAs) can simultaneously contribute to biodiversity conservation and fisheries management, the global network is biased towards particular ecosystem types, as it was largely established in an ad hoc fashion. The optimization of trade-offs between biodiversity benefits and socio-economic values increases implementation success and minimizes enforcement costs in the long run, but is often neglected in marine spatial planning (MSP). Although the acquisition of spatially explicit socioeconomic data is often perceived as a costly/secondary step in MSP, it is critical to account for lost opportunities by people whose activities will be restricted, especially fishers...
June 24, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/28646366/endothelial-cell-apoptosis-in-angiogenesis-and-vessel-regression
#3
REVIEW
Emma C Watson, Zoe L Grant, Leigh Coultas
Blood vessel regression is an essential process for ensuring blood vessel networks function at optimal efficiency and for matching blood supply to the metabolic needs of tissues as they change over time. Angiogenesis is the major mechanism by which new blood vessels are produced, but the vessel growth associated with angiogenesis must be complemented by remodeling and maturation events including the removal of redundant vessel segments and cells to fashion the newly forming vasculature into an efficient, hierarchical network...
June 23, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28645853/anterior-pallidal-deep-brain-stimulation-for-tourette-s-syndrome-a-randomised-double-blind-controlled-trial
#4
Marie-Laure Welter, Jean-Luc Houeto, Stéphane Thobois, Benoit Bataille, Marc Guenot, Yulia Worbe, Andreas Hartmann, Virginie Czernecki, Eric Bardinet, Jerome Yelnik, Sophie Tezenas du Montcel, Yves Agid, Marie Vidailhet, Philippe Cornu, Audrey Tanguy, Solène Ansquer, Nematollah Jaafari, Emmanuel Poulet, Giulia Serra, Pierre Burbaud, Emmanuel Cuny, Bruno Aouizerate, Pierre Pollak, Stephan Chabardes, Mircea Polosan, Michel Borg, Denys Fontaine, Bruno Giordana, Sylvie Raoul, Tiphaine Rouaud, Anne Sauvaget, Isabelle Jalenques, Carine Karachi, Luc Mallet
BACKGROUND: Deep brain stimulation (DBS) has been proposed to treat patients with severe Tourette's syndrome, and open-label trials and two small double-blind trials have tested DBS of the posterior and the anterior internal globus pallidus (aGPi). We aimed to specifically assess the efficacy of aGPi DBS for severe Tourette's syndrome. METHODS: In this randomised, double-blind, controlled trial, we recruited patients aged 18-60 years with severe and medically refractory Tourette's syndrome from eight hospitals specialised in movement disorders in France...
June 20, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28645423/a-technique-for-extraction-of-the-distal-segment-of-a-broken-femoral-nail-using-a-flexible-reamer
#5
C Zhao, G J R Slater
INTRODUCTION: Extraction of broken femoral nails in peri-implant fractures is becoming an increasingly common problem faced by orthopaedic surgeons. Different closed and open techniques for removal of broken nails have been previously described but due to variations in equipment and fracture configurations these methods are not always easily reproducible. We describe an open surgical technique using simple equipment that can be utilised when other methods of extraction have failed. CASE PRESENTATION AND SURGICAL TECHNIQUE: We present a case of a peri-implant fracture secondary to non-union involving a short cephalomedullary nail where the broken distal segment of nail was significantly more distal to the femoral fracture site...
June 16, 2017: Injury
https://www.readbyqxmd.com/read/28645209/genome-wide-mapping-of-in-vivo-er%C3%AE-binding-sites-in-male-mouse-efferent-ductules
#6
Guangxin Yao, Shuanggang Hu, Lu Yu, Yanfei Ru, Charlie Degui Chen, Qiang Liu, Yonglian Zhang
As an important nuclear hormone receptor, estrogen receptor alpha (ERα), which is encoded by Esr1 gene, regulates the expression of hundreds of genes in a stimulus-specific, temporal and tissue-specific fashion, mainly by binding to specific DNA sequences-estrogen response elements (EREs). As an important estrogen target tissue in males, the function of the efferent ductules relies on the presence of the ERα protein, but the underlying regulatory mechanisms are poorly illustrated. In this study, genome-wide ERα-binding sites in mouse efferent ductules were mapped by ChIP-seq...
June 22, 2017: Endocrinology
https://www.readbyqxmd.com/read/28645071/television-viewing-and-risk-of-mortality-exploring-the-biological-plausibility
#7
Mark Hamer, Thomas Yates, Panayotes Demakakos
BACKGROUND AND AIMS: Television (TV) viewing is a major component of leisure sedentary time, and has been consistently associated with cardiovascular disease. We examined the extent to which metabolic biomarkers explain the association between TV viewing and mortality. METHODS: Participants (N = 8,451, aged 64.8 ± 9.9 yrs) were drawn from The English Longitudinal Study of Ageing (ELSA), a national prospective cohort study of community-dwelling men and women living in England...
June 9, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28644470/rapid-heteroatom-transfer-to-arylmetals-utilizing-multifunctional-reagent-scaffolds
#8
Hongyin Gao, Zhe Zhou, Doo-Hyun Kwon, James Coombs, Steven Jones, Nicole Erin Behnke, Daniel H Ess, László Kürti
Arylmetals are highly valuable carbon nucleophiles that are readily and inexpensively prepared from aryl halides or arenes and widely used on both laboratory and industrial scales to react directly with a wide range of electrophiles. Although C-C bond formation has been a staple of organic synthesis, the direct transfer of primary amino (-NH2) and hydroxyl (-OH) groups to arylmetals in a scalable and environmentally friendly fashion remains a formidable synthetic challenge because of the absence of suitable heteroatom-transfer reagents...
July 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28644209/an-atypical-case-of-paracentral-acute-middle-maculopathy
#9
Cheryl Haskes, Shannon Santapaola, Jordan Zinn
PURPOSE: This is a case presentation of paracentral acute middle maculopathy in a 33-year-old white man with borderline hyperlipidemia. Paracentral acute middle maculopathy was originally thought to be a variant of acute macular neuroretinopathy; however, it is now generally accepted that these two conditions are separate disease entities. The etiology, evolution, and pathophysiology of acute macular neuroretinopathy and paracentral acute middle maculopathy are discussed, as well as current diagnostic techniques...
June 21, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28644024/direct-visible-light-excited-asymmetric-lewis-acid-catalysis-of-intermolecular-2-2-photocycloadditions
#10
Xiaoqiang Huang, Taylor Robyn Quinn, Klaus Harms, Richard D Webster, Lilu Zhang, Olaf Wiest, Eric Meggers
A reaction design is reported in which a substrate-bound chiral Lewis acid complex absorbs visible light and generates an excited state which directly reacts with a co-substrate in a highly stereocontrolled fashion. Specifically, a chiral rhodium complex catalyzes visible-light-activated intermolecular [2+2] cycloadditions, providing a wide range of cyclobutanes with up to >99% ee and up to >20:1 d.r. Noteworthy is the ability to create vicinal all-carbon-quaternary stereocenters including spiro centers in an intermolecular fashion...
June 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28643694/simultaneous-maximum-a-i-posteriori-i-longitudinal-pet-image-reconstruction
#11
Sam Ellis, Andrew J Reader
Positron emission tomography (PET) is frequently used to monitor functional changes that occur over extended time scales, for example in longitudinal oncology PET protocols that include routine clinical follow-up scans to assess the efficacy of a course of treatment. In these contexts PET datasets are currently reconstructed into images using single-dataset reconstruction methods. Inspired by recently proposed joint PET-MR reconstruction methods, we propose to reconstruct longitudinal datasets simultaneously by using a joint penalty term in order to exploit the high degree of similarity between longitudinal images...
June 23, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28643477/red-wine-polyphenols-do-not-improve-obesity-associated-insulin-resistance-a-randomized-controlled-trial
#12
Jorn Woerdeman, Daniele Del Rio, Luca Calani, Etto C Eringa, Yvo M Smulders, Erik H Serné
Preclinical studies have suggested that polyphenols extracted from red wine (RWPs) favorably affect insulin sensitivity, but controversy exists on whether RWPs exert similar effects in humans. This study aimed to determine whether RWPs improve insulin sensitivity in obese volunteers. Obese (BMI>30) volunteers were randomly allocated to RWPs 600 mg/day (n = 14) or matched placebo (n = 15) in a double-blind fashion (parallel-arm) for 8 weeks. Subjects were investigated at baseline and at the end of the study (EOS)...
June 23, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28643400/a-study-of-regulatory-policies-and-relevant-issues-concerning-electronic-cigarette-use-in-taiwan
#13
Tzuu Hwa Jiang, Li Min Cheng, Matthew A Hawkins
Recent technological innovations have increased the amount of tobacco products available to smokers. In particular, electronic cigarettes, sometimes call e-cigarettes, have received substantial attention as their sales have rapidly increased. Electronic cigarettes were invented in China and now have become prevalent worldwide. Electronic cigarettes can be considered fashionable and come in numerous flavors; accordingly, many young adults and students have begun to use e-cigarettes. However, like traditional tobacco products, e-cigarettes have negative influences on human health...
June 23, 2017: International Journal of Health Planning and Management
https://www.readbyqxmd.com/read/28643308/-anatomical-strategies-of-henle-trunk-in-laparoscopic-right-hemi-colectomy-for-right-colon-cancer
#14
Bo Feng, Xialin Yan, Sen Zhang, Pei Xue, Zirui He, Minhua Zheng
The advancement of laparoscopic surgery serves as a trigger for better understanding of the vascular structure at the inferior border of the pancreas, especially Henle trunk. Henle trunk was first found as convergence to superior mesenteric vein (SMV) conjoined by sub-right colon vein (SRCV) and right gastroepiploic vein (RGEV), but decades later, anterior superior pancreatic duodenal vein (ASPDV) was described as another conjoint vein of Henle trunk. These tributaries are the basic elements of Henle trunk in early years' study...
June 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28643069/lessons-learned-from-a-phase-ii-clinical-trial-of-laparoscopic-hipec-for-gastric-cancer
#15
Brian Badgwell, Mariela Blum, Prajnan Das, Jeannelyn Estrella, Xuemei Wang, Keith Fournier, Richard Royal, Paul Mansfield, Jaffer Ajani
BACKGROUND: Over the last two decades, intraperitoneal chemotherapy has been found to have activity for select subgroups of patients with carcinomatosis from colon, ovarian, appendiceal, and recently, gastric origins. However, there is little data to support an aggressive surgical approach of cytoreduction (debulking) and hyperthermic intraperitoneal perfusion with chemotherapy (HIPEC) for patients with gastric cancer and positive cytology or carcinomatosis. The morbidity and mortality rates of cytoreduction and HIPEC, in combination with gastrectomy, are significant and the survival rates of this approach may not extend beyond that of treatment with systemic chemotherapy...
June 22, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28642945/nonribosomal-peptide-synthetase-biosynthetic-clusters-of-eskape-pathogens
#16
REVIEW
Andrew M Gulick
Covering: up to 2017.Natural products are important secondary metabolites produced by bacterial and fungal species that play important roles in cellular growth and signaling, nutrient acquisition, intra- and interspecies communication, and virulence. A subset of natural products is produced by nonribosomal peptide synthetases (NRPSs), a family of large, modular enzymes that function in an assembly line fashion. Because of the pharmaceutical activity of many NRPS products, much effort has gone into the exploration of their biosynthetic pathways and the diverse products they make...
June 23, 2017: Natural Product Reports
https://www.readbyqxmd.com/read/28641273/learning-and-recognition-of-clothing-genres-from-full-body-images
#17
Shintami C Hidayati, Chuang-Wen You, Wen-Huang Cheng, Kai-Lung Hua
According to the theory of clothing design, the genres of clothes can be recognized based on a set of visually differentiable style elements, which exhibit salient features of visual appearance and reflect high-level fashion styles for better describing clothing genres. Instead of using less-discriminative low-level features or ambiguous keywords to identify clothing genres, we proposed a novel approach for automatically classifying clothing genres based on the visually differentiable style elements. A set of style elements, that are crucial for recognizing specific visual styles of clothing genres, were identified based on the clothing design theory...
June 19, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28640455/adjunct-fixation-with-a-kirschner-wire-or-a-plate-for-lateral-unicondylar-humeral-fracture-stabilization
#18
Jason D Coggeshall, Daniel D Lewis, Alex Iorgulescu, Stanley E Kim, Lindsey S Palm, Antonio Pozzi
OBJECTIVE: To compare the biomechanical properties of using an interfragmentary 1.6 mm Kirschner wire or a 2.7 mm reconstruction plate as adjunctive epicondylar stabilization in simulated comminuted lateral unicondylar humeral fractures stabilized with a transcondylar 4.5 mm cortical screw. STUDY DESIGN: Cadaveric biomechanical assessment. SAMPLE POPULATION: Paired humeri harvested from 9 young, skeletally mature dogs. METHODS: Simulated comminuted lateral unicondylar humeral fractures were stabilized with a transcondylar 4...
June 22, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28639563/the-role-of-apical-contractility-in-determining-cell-morphology-in-multilayered-epithelial-sheets-and-tubes
#19
Rui Zhen Tan, Tanny Lai, Keng-Hwee Chiam
A multilayered epithelium is made up of individual cells that are stratified in an orderly fashion, layer by layer. In such tissues, individual cells can adopt a wide range of shapes ranging from columnar to squamous. From histological images, we observe that, in flat epithelia such as the skin, the cells in the top layer are squamous while those in the middle and bottom layers are columnar, whereas in tubular epithelia, the cells in all layers are columnar. We develop a computational model to understand how individual cell shape is governed by the mechanical forces within multilayered flat and curved epithelia...
June 22, 2017: Physical Biology
https://www.readbyqxmd.com/read/28639253/ultrasonography-in-trauma-a-nation-wide-cross-sectional-investigation
#20
Jesper Weile, Klaus Nielsen, Stine C Primdahl, Christian A Frederiksen, Christian B Laursen, Erik Sloth, Hans Kirkegaard
BACKGROUND: The Focused Assessment with Sonography in Trauma (FAST) protocol is considered beneficial in emergent evaluation of trauma patients with blunt or penetrating injury and has become integrated into the Advanced Trauma Life Support (ATLS) protocol. No guidelines exist as to the use of ultrasonography in trauma in Denmark. We aimed to determine the current use of ultrasonography for assessing trauma patients in Denmark. METHODS: We conducted a nation-wide cross-sectional investigation of ultrasonography usage in trauma care...
December 2017: Critical Ultrasound Journal
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