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https://www.readbyqxmd.com/read/29329226/plils-a-practical-indoor-localization-system-through-less-expensive-wireless-chips-via-subregion-clustering
#1
Xiaolong Li, Yifu Yang, Jun Cai, Yun Deng, Junfeng Yang, Xinmin Zhou, Lina Tan
Reducing costs is a pragmatic method for promoting the widespread usage of indoor localization technology. Conventional indoor localization systems (ILSs) exploit relatively expensive wireless chips to measure received signal strength for positioning. Our work is based on a cheap and widely-used commercial off-the-shelf (COTS) wireless chip, i.e., the Nordic Semiconductor nRF24LE1, which has only several output power levels, and proposes a new power level based-ILS, called Plils. The localization procedure incorporates two phases: an offline training phase and an online localization phase...
January 12, 2018: Sensors
https://www.readbyqxmd.com/read/29315917/covalent-bonding-of-thermoplastics-to-rubbers-for-printable-reel-to-reel-processing-in-soft-robotics-and-microfluidics
#2
Jay M Taylor, Karla Perez-Toralla, Ruby Aispuro, Stephen A Morin
The lamination of mechanically stiff structures to elastic materials is prevalent in biological systems and popular in many emerging synthetic systems, such as soft robotics, microfluidics, stretchable electronics, and pop-up assemblies. The disparate mechanical and chemical properties of these materials have made it challenging to develop universal synthetic procedures capable of reliably adhering to these classes of materials together. Herein, a simple and scalable procedure is described that is capable of covalently laminating a variety of commodity ("off-the-shelf") thermoplastic sheets to silicone rubber films...
January 8, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29306626/mid-term-outcomes-of-endovascular-repair-of-ruptured-thoraco-abdominal-aortic-aneurysms-with-off-the-shelf-branched-stent-grafts
#3
Kiattisak Hongku, Björn Sonesson, Katarina Björses, Jan Holst, Timothy Resch, Nuno V Dias
OBJECTIVE: To assess the mid-term outcomes and feasibility of branched endovascular repair (b-EVAR) of ruptured thoracoabdominal aortic aneurysms (rTAAAs). METHODS: All patients undergoing b-EVAR of rTAAAs between 2011 and 2016 were included. Pre-, intra and postoperative imaging was reviewed to assess technical success, outcomes, and feasibility of b-EVAR in the emergent setting. RESULTS: Eleven emergency b-EVAR of rTAAAs (10 aneurysms and 1 chronic dissection) were performed using off-the-shelf (OTS) branched stentgrafts...
January 3, 2018: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29301168/design-and-development-of-a-novel-distance-learning-telementoring-system-using-off-the-shelf-materials-and-software
#4
James C Rosser, Jeffrey P Fleming, Timothy B Legare, Katherine M Choi, Jamie Nakagiri, Elliot Griffith
OBJECTIVE: To design and develop a distance learning (DL) system for the transference of laparoscopic surgery knowledge and skill constructed from off-the-shelf materials and commercially available software. INTRODUCTION: Minimally invasive surgery offers significant benefits over traditional surgical procedures, but adoption rates for many procedures are low. Skill and confidence deficits are two of the culprits. DL combined with simulation training and telementoring may address these issues with scale...
December 22, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29289106/tracking-kidney-stones-in-a-homogeneous-medium-using-a-trilateration-approach
#5
Kya Shoar, Benjamin W Turney, Robin O Cleveland
Shock wave lithotripsy is a non-invasive procedure by which kidney stones are fragmented by thousands of shock waves. Currently, many shock waves are delivered to the body that do not impact the stone, but do result in tissue trauma. This motivates developing a monitoring system to locate kidney stones, with the goal of gating shock waves not aligned with the stone, and hence, reducing renal trauma during lithotripsy. The system consists of a circular array housing twenty-two 0.5 MHz transducers that can be mounted on a clinical lithotripter...
December 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29251619/-the-influence-of-enzymatic-removal-of-chlorpyrifos-from-feed-grain-mixture-on-the-biochemical-parameters-of-rat-blood
#6
O V Maslova, O V Senko, E N Efremenko
Organophosphorus pesticides (OP) are used to protect crops from pests. Treatment of plants and animals with pesticides can be done during their growth or creation of conditions necessary for the long-shelf life of the agricultural products. Currently, there are many remedies for prevention and removal of intoxication consequences developed under the action of OP in living organisms. The development of biologics for the degradation of OP and biotechnologies for their application in agriculture is relevant. New biologics based on the stabilized forms of such enzyme as hexahistidine-tagged organophosphorus hydrolase (His6-OPH) in the form of nano-sized particles were tried for OP detoxification...
November 2017: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/29235388/early-outcomes-of-the-t-branch-off-the-shelf-multibranched-stent-graft-in-urgent-thoracoabdominal-aortic-aneurysm-repair
#7
Konstantinos Spanos, Tilo Kölbel, Myrto Theodorakopoulou, Franziska Heidemann, Fiona Rohlffs, Eike Sebastian Debus, Nikolaos Tsilimparis
PURPOSE: To assess the short-term outcomes of the multibranched off-the-shelf t-Branch stent-graft for urgent thoracoabdominal aortic aneurysm (TAAA) repair and to evaluate the impact on outcomes of the learning curve and adherence to the instruction for use (IFU). METHODS: Between 2014 and 2017, 42 patients (mean age 73.3±7 years; 26 men) underwent urgent TAAA treatment using the t-Branch stent-graft [18 in the early (2014-2015) period and 24 in the late (2016-2017) period]...
December 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/29160630/synthetic-grafts-in-the-treatment-of-ruptured-anterior-cruciate-ligament-of-the-knee-joint
#8
REVIEW
Wojciech Satora, Aleksandra Królikowska, Andrzej Czamara, Paweł Reichert
The anterior cruciate ligament (ACL) is cited as the most frequently injured ligament in the knee. The standard treatment of ACL injury remains ligament reconstruction followed by a postoperative physiotherapeutic procedure. During the reconstruction, the torn ligament can be replaced with an autograft or an allograft. A synthetic ligament is also one of the available graft options. Synthetic grafts in ruptured ACL treatment have been used as scaffolds, stents, or prostheses. The story of using synthetic materials in ACL deficient knee treatment started in the beginning of the 20th century with the usage of silk and silver fibers...
January 2017: Polimery W Medycynie
https://www.readbyqxmd.com/read/29153534/configuration-affects-parallel-stent-grafting-results
#9
Adam Tanious, Mathew Wooster, Paul A Armstrong, Bruce Zwiebel, Shane Grundy, Martin R Back, Murray L Shames
OBJECTIVE: A number of adjunctive "off-the-shelf" procedures have been described to treat complex aortic diseases. Our goal was to evaluate parallel stent graft configurations and to determine an optimal formula for these procedures. METHODS: This is a retrospective review of all patients at a single medical center treated with parallel stent grafts from January 2010 to September 2015. Outcomes were evaluated on the basis of parallel graft orientation, type, and main body device...
November 16, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29140644/evaluation-of-low-cost-hydrogen-sulfide-monitors-for-use-in-livestock-production
#10
Jessica M Beswick-Honn, Thomas M Peters, T Renée Anthony
Direct-reading gas monitors warn workers of the risk of potentially fatal hydrogen sulfide (H2S) exposures that may arise during manure handling. Low-cost, low-maintenance H2S monitors are available from many manufacturers, but differences in their features and performance make selection challenging for farmers. Moreover, little information is available on the practical maintenance and performance of these devices in agricultural environments. The objective of this study was to provide information to agricultural workers to aid in the selection, maintenance, and use of low-cost H2S monitors...
November 20, 2017: Journal of Agricultural Safety and Health
https://www.readbyqxmd.com/read/29133296/comparison-of-preservation-and-transportation-protocols-for-preloaded-descemet-membrane-endothelial-keratoplasty
#11
Vito Romano, Mohit Parekh, Alessandro Ruzza, Colin E Willoughby, Stefano Ferrari, Diego Ponzin, Stephen B Kaye, Hannah J Levis
BACKGROUND/AIMS: Descemet membrane endothelial keratoplasty (DMEK) preparation is technically demanding and is a limiting factor for uptake of this kind of surgery. Supply methods that simplify the procedure for surgeons are key to increasing uptake. This study compares two different shipping protocols for DMEK. METHODS: An 8.5 mm DMEK graft was punched, marked and loaded for transportation in two different conditions: (A) endothelium trifolded inwards in organ culture conditions (n=7) and (B) endothelium rolled outwards in hypothermic conditions (n=7)...
November 13, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29111064/quantification-of-food-polysaccharide-mixtures-by-1-h-nmr
#12
Donny W H Merkx, Yvonne Westphal, Ewoud J J van Velzen, Kavish V Thakoer, Niels de Roo, John P M van Duynhoven
Polysaccharides are food ingredients that critically determine rheological properties and shelf life. A qualitative and quantitative assessment on food-specific polysaccharide mixtures by (1)H NMR is presented. The method is based on the identification of intact polysaccharides, combined with a quantitative analysis of their monosaccharide constituents. Identification of the polysaccharides is achieved by (1)H NMR line shape fitting with pure compound spectra. The monomeric composition was determined using the Saeman hydrolysis procedure, followed by direct monosaccharide quantification by (1)H NMR...
January 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29097044/standard-off-the-shelf-multibranched-thoracoabdominal-endograft-in-urgent-and-elective-patients-with-single-and-staged-procedures-in-a-multicenter-experience
#13
Roberto Silingardi, Stefano Gennai, Nicola Leone, Mauro Gargiulo, Gianluca Faggioli, Piergiorgio Cao, Fabio Verzini, Arnaldo Ippoliti, Nicola Tusini, Carmelo Ricci, Michele Antonello, Roberto Chiesa, Enrico Maria Marone, Nicola Mangialardi, Francesco Speziale, Gian Franco Veraldi, Stefano Bonardelli, Luigi Marcheselli
OBJECTIVE: The objective of this study was to assess immediate and midterm outcomes for urgent/emergent and elective patients with thoracoabdominal aortic aneurysms (TAAAs) treated with the first commercially available "off-the-shelf" multibranched endograft for endovascular aneurysm repair, with a single-step or a staged surgical approach. METHODS: A multicenter, nonrandomized, retrospective study was conducted of TAAA patients grouped by urgent/emergent and elective treatment with multibranched endograft for endovascular aneurysm repair at 13 Italian centers from November 2012 to August 2016...
October 31, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29093182/a-completely-biological-off-the-shelf-arteriovenous-graft-that-recellularizes-in-baboons
#14
Zeeshan H Syedain, Melanie L Graham, Ty B Dunn, Timothy O'Brien, Sandra L Johnson, Robert J Schumacher, Robert T Tranquillo
Prosthetic arteriovenous grafts (AVGs) conventionally used for hemodialysis are associated with inferior primary patency rates and increased risk of infection compared with autogenous vein grafts. We tissue-engineered an AVG grown from neonatal human dermal fibroblasts entrapped in bovine fibrin gel that is then decellularized. This graft is both "off-the-shelf" (nonliving) and completely biological. Grafts that are 6 mm in diameter and about 15 cm in length were evaluated in a baboon model of hemodialysis access in an axillary-cephalic or axillary-brachial upper arm AVG construction procedure...
November 1, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29091435/time-resolved-gravimetric-method-to-assess-degassing-of-roasted-coffee
#15
Samo Smrke, Marco Wellinger, Tomonori Suzuki, Franz Balsiger, Sebastian E W Opitz, Chahan Yeretzian
During the roasting of coffee, thermally driven chemical reactions lead to the formation of gases, of which a large fraction is carbon dioxide (CO2). Part of these gases is released during roasting while part is retained inside the porous structure of the roasted beans and is steadily released during storage or more abruptly during grinding and extraction. The release of CO2 during the various phases from roasting to consumption is linked to many important properties and characteristics of coffee. It is an indicator for freshness, plays an important role in shelf life and in packaging, impacts the extraction process, is involved in crema formation, and may affect the sensory profile in the cup...
November 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29064417/precise-gnss-positioning-using-smart-devices
#16
Eugenio Realini, Stefano Caldera, Lisa Pertusini, Daniele Sampietro
The recent access to GNSS (Global Navigation Satellite System) phase observations on smart devices, enabled by Google through its Android operating system, opens the possibility to apply precise positioning techniques using off-the-shelf, mass-market devices. The target of this work is to evaluate whether this is feasible, and which positioning accuracy can be achieved by relative positioning of the smart device with respect to a base station. Positioning of a Google/HTC Nexus 9 tablet was performed by means of batch least-squares adjustment of L1 phase double-differenced observations, using the open source goGPS software, over baselines ranging from approximately 10 m to 8 km, with respect to both physical (geodetic or low-cost) and virtual base stations...
October 24, 2017: Sensors
https://www.readbyqxmd.com/read/29057355/systematic-review-of-3d-printing-in-spinal-surgery-the-current-state-of-play
#17
REVIEW
Ben Wilcox, Ralph J Mobbs, Ai-Min Wu, Kevin Phan
Three-dimensional printing (3DP), also known as "Additive Manufacturing", is a rapidly growing industry, particularly in the area of spinal surgery. Given the complex anatomy of the spine and delicate nature of surrounding structures, 3DP has the potential to aid surgical planning and procedural accuracy. We perform a systematic review of current literature on the applications of 3DP in spinal surgery. Six electronic databases were searched for original published studies reporting cases or outcomes for 3DP surgical models, guides or implants for spinal surgery...
September 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29053608/the-multi-parameter-wireless-sensing-system-mpwise-its-description-and-application-to-earthquake-risk-mitigation
#18
Tobias Boxberger, Kevin Fleming, Massimiliano Pittore, Stefano Parolai, Marco Pilz, Stefan Mikulla
The Multi-Parameter Wireless Sensing (MPwise) system is an innovative instrumental design that allows different sensor types to be combined with relatively high-performance computing and communications components. These units, which incorporate off-the-shelf components, can undertake complex information integration and processing tasks at the individual unit or node level (when used in a network), allowing the establishment of networks that are linked by advanced, robust and rapid communications routing and network topologies...
October 20, 2017: Sensors
https://www.readbyqxmd.com/read/29041166/exponential-fringe-pattern-projection-approach-to-gamma-independent-phase-computation-without-calibration-for-gamma-nonlinearity-in-3d-optical-metrology
#19
Ali Babaei, Mohammad Saadatseresht, Jonathan Kofman
This paper presents a method that expresses the fringe pattern as an exponential function and a mathematical model for gamma-independent phase computation. The method was compared to: (i) conventional phase measurement without nonlinearity correction, and (ii) conventional gamma correction by pattern pre-distortion based on an input-to-projector camera-output look-up table. The pre-distorted and exponential methods achieved large reduction in error compared to conventional computation with no gamma correction...
October 16, 2017: Optics Express
https://www.readbyqxmd.com/read/29027185/advanced-containment-methods-for-legg-calv%C3%A3-perthes-disease-triple-pelvic-osteotomy-versus-chiari-osteotomy
#20
Olivier Rosello, Federico Solla, Ioana Oborocianu, Edouard Chau, Tony ElHayek, Jean-Luc Clement, Virginie Rampal
INTRODUCTION: The goal of intervention in Legg-Calvé-Perthes disease (LCPD) is to prevent femoral head deformation by containing the head within the acetabulum. Currently, surgical containment methods are the mainstay of treatment, and pelvic osteotomies have been shown to be successful. They include triple pelvic osteotomy (TPO), Salter osteotomy, Chiari osteotomy and shelf procedure. The purpose of this study was to compare clinical and radiologic results for Chiari osteotomy and TPO in LCPD...
October 11, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
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