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Mohammed A Zwawi, Faissal A Moslehy, Christopher Rose, Victor Huayamave, Alain J Kassab, Eduardo Divo, Brendan J Jones, Charles T Price
: This study utilized a computational biomechanical model and applied the least energy path principle to investigate two pathways for closed reduction of high grade infantile hip dislocation. The principle of least energy when applied to moving the femoral head from an initial to a final position considers all possible paths that connect them and identifies the path of least resistance. Clinical reports of severe hip dysplasia have concluded that reduction of the femoral head into the acetabulum may occur by a direct pathway over the posterior rim of the acetabulum when using the Pavlik harness, or by an indirect pathway with reduction through the acetabular notch when using the modified Hoffman-Daimler method...
October 20, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Aurélie Moskal, Heinz Freisling, Graham Byrnes, Nada Assi, Michael T Fahey, Mazda Jenab, Pietro Ferrari, Anne Tjønneland, Kristina En Petersen, Christina C Dahm, Camilla Plambeck Hansen, Aurélie Affret, Marie-Christine Boutron-Ruault, Claire Cadeau, Tilman Kühn, Verena Katzke, Khalid Iqbal, Heiner Boeing, Antonia Trichopoulou, Christina Bamia, Androniki Naska, Giovanna Masala, Maria Santucci de Magistris, Sabina Sieri, Rosario Tumino, Carlotta Sacerdote, Petra H Peeters, Bas H Bueno-de-Mesquita, Dagrun Engeset, Idlir Licaj, Guri Skeie, Eva Ardanaz, Genevieve Buckland, José M Huerta Castaño, José R Quirós, Pilar Amiano, Elena Molina-Portillo, Anna Winkvist, Robin Myte, Ulrika Ericson, Emily Sonestedt, Aurora Perez-Cornago, Nick Wareham, Kay-Tee Khaw, Inge Huybrechts, Konstantinos K Tsilidis, Heather Ward, Marc J Gunter, Nadia Slimani
BACKGROUND: Much of the current literature on diet-colorectal cancer (CRC) associations focused on studies of single foods/nutrients, whereas less is known about nutrient patterns. We investigated the association between major nutrient patterns and CRC risk in participants of the European Prospective Investigation into Cancer and Nutrition (EPIC) study. METHODS: Among 477 312 participants, intakes of 23 nutrients were estimated from validated dietary questionnaires...
October 20, 2016: British Journal of Cancer
Mohammad Zarei, Arvin Najafi, Pejman Mansouri, Sadaf Sadeghi-Yazdankhah, Houshang Saberi, Mehran Moradi, Mahmoud Farzan
OBJECTIVES: Despite the progress in understanding acute pain physiology during recent decade, eighty percent of patients still suffer from post-operative discomfort. Pregabalin is an anticonvulsant agent that is approved for painful neuropathies in diabetic patients and post herpetic neuralgia. The main objective of the present study was to compare the improvement in post-operative pain management and patient lifestyle in 3 groups, as first group received placebo, second who received Pregabalin for one day and the last group those who received it for 14 days...
October 17, 2016: Clinical Neurology and Neurosurgery
Shashanka Ubaru, Abd-Krim Seghouane, Yousef Saad
This letter considers the problem of dictionary learning for sparse signal representation whose atoms have low mutual coherence. To learn such dictionaries, at each step, we first updated the dictionary using the method of optimal directions (MOD) and then applied a dictionary rank shrinkage step to decrease its mutual coherence. In the rank shrinkage step, we first compute a rank 1 decomposition of the column-normalized least squares estimate of the dictionary obtained from the MOD step. We then shrink the rank of this learned dictionary by transforming the problem of reducing the rank to a nonnegative garrotte estimation problem and solving it using a path-wise coordinate descent approach...
October 20, 2016: Neural Computation
Man Hu, Chenghao Zhu, Xiaoxing Li, Yongli Xu
Glaucoma is a serious disease that can cause complete, permanent blindness, and its early diagnosis is very difficult. In recent years, computer-aided screening and diagnosis of glaucoma has made considerable progress. The optic cup segmentation from fundus images is an extremely important part for the computer-aided screening and diagnosis of glaucoma. This paper presented an automatic optic cup segmentation method that used both color difference information and vessel bends information from fundus images to determine the optic cup boundary...
October 20, 2016: Bioengineered
Elisabeth Wiig, Janne E Reseland, Kjartan Østbye, Håvard J Haugen, Leif A Vøllestad
INTRODUCTION: It is important to understand the drivers leading to adaptive phenotypic diversity within and among species. The threespine stickleback (Gasterosteus aculeatus) has become a model system for investigating the genetic and phenotypic responses during repeated colonization of fresh waters from the original marine habitat. During the freshwater colonization process there has been a recurrent and parallel reduction in the number of lateral bone plates, making it a suitable system for studying adaptability and parallel evolution...
2016: PloS One
Natasa M Milic, Srdjan Masic, Jelena Milin-Lazovic, Goran Trajkovic, Zoran Bukumiric, Marko Savic, Nikola V Milic, Andja Cirkovic, Milan Gajic, Mirjana Kostic, Aleksandra Ilic, Dejana Stanisavljevic
BACKGROUND: The scientific community increasingly is recognizing the need to bolster standards of data analysis given the widespread concern that basic mistakes in data analysis are contributing to the irreproducibility of many published research findings. The aim of this study was to investigate students' attitudes towards statistics within a multi-site medical educational context, monitor their changes and impact on student achievement. In addition, we performed a systematic review to better support our future pedagogical decisions in teaching applied statistics to medical students...
2016: PloS One
Sean Ekins, Alexander L Perryman, Carolina Horta Andrade
The Zika virus outbreak in the Americas has caused global concern. To help accelerate this fight against Zika, we launched the OpenZika project. OpenZika is an IBM World Community Grid Project that uses distributed computing on millions of computers and Android devices to run docking experiments, in order to dock tens of millions of drug-like compounds against crystal structures and homology models of Zika proteins (and other related flavivirus targets). This will enable the identification of new candidates that can then be tested in vitro, to advance the discovery and development of new antiviral drugs against the Zika virus...
October 2016: PLoS Neglected Tropical Diseases
Eric C Honert, Karl E Zelik
INTRODUCTION: Inverse dynamics joint kinetics are often used to infer contributions from underlying groups of muscle-tendon units (MTUs). However, such interpretations are confounded by multiarticular (multi-joint) musculature, which can cause inverse dynamics to over- or under-estimate net MTU power. Misestimation of MTU power could lead to incorrect scientific conclusions, or to empirical estimates that misguide musculoskeletal simulations, assistive device designs, or clinical interventions...
2016: PloS One
Jason Karslake, Jeff Maltas, Peter Brumm, Kevin B Wood
The inoculum effect (IE) is an increase in the minimum inhibitory concentration (MIC) of an antibiotic as a function of the initial size of a microbial population. The IE has been observed in a wide range of bacteria, implying that antibiotic efficacy may depend on population density. Such density dependence could have dramatic effects on bacterial population dynamics and potential treatment strategies, but explicit measures of per capita growth as a function of density are generally not available. Instead, the IE measures MIC as a function of initial population size, and population density changes by many orders of magnitude on the timescale of the experiment...
October 2016: PLoS Computational Biology
Suleyman Kutalmiş Buyuk, Mevlut Celikoglu, Yasin Atakan Benkli, Ahmet Ercan Sekerci
AIM: The aim of the study was to evaluate the transverse craniofacial morphology of the adolescent patients affected by unilateral cleft lip and palate (UCLP) and to compare the findings with age- and sex-matched control group without any cleft using their cone-beam computed tomography (CBCT) images. METHODS: The study sample (n = 56 patients; mean age: 14.35 ± 3.06 years) consisted of 26 UCLP (n = 26 patients; 10 women and 16 men; mean age: 13.70 ± 2...
October 2016: Journal of Craniofacial Surgery
David Sanders, Dianne Bryant, Christina Tieszer, Abdel Lawendy, Mark MacLeod, Steven Papp, Liew Allan, Viskontas Darius, Coles Chad, Gurr Kevin, Carey Tim, Gofton Wade, Bailey Chris, Bartley Debra, Andrew Trenholm, Stone Trevor, Leighton Ross, Julia Foxall, Mauri Zomar, Kelly Trask
OBJECTIVES: To compare outcomes in elderly patients with intertrochanteric hip fractures treated with either the sliding hip screw (SHS) or InterTAN intramedullary device (IT). DESIGN: Prospective, randomized, multi-centre clinical trial SETTING:: Five level 1 trauma centresPatients/Participants: 249 patients aged 55 years or older with AO/OTA 31A1 (43) and OA/OTA 31A2 (206) fractures were prospectively enrolled and followed for 12 months. INTERVENTION: Computer generated randomization to either IT (n=123) or SHS (n=126)...
September 30, 2016: Journal of Orthopaedic Trauma
Hyung-In Yoon
OBJECTIVE: This report is to present the treatment procedure and clinical considerations of prosthodontic management of a patient who had undergone a partial mandibulectomy and fibular free flap surgery. DESIGN: A 59-year-old man with a squamous cell carcinoma received a partial mandibular resection. Microsurgical reconstruction with a fibular free flap surgery and implant-supported zirconia-fixed prosthesis produced by computer-aided manufacturing led to successful results for the oral rehabilitation of mandibular defects...
October 2016: Journal of Craniofacial Surgery
Vijayalakshmi Padmanabhan, Heather B Steinmetz, Elizabeth J Rizzo, Amber J Erskine, Tamara L Fairbank, Francine B de Abreu, Gregory J Tsongalis, Laura J Tafe
CONTEXT: -At our medical center, cytopathologists perform rapid on-site evaluation for specimen adequacy of fine-needle aspiration and touch imprint of needle core biopsy lung cancer samples. Two years ago the molecular diagnostics laboratory at our institution changed to next-generation sequencing using the Ion Torrent PGM and the 50-gene AmpliSeq Cancer Hotspot Panel v2 for analyzing mutations in a 50-gene cancer hot spot panel. This was associated with in a dramatic fall in adequacy rate (68%)...
October 20, 2016: Archives of Pathology & Laboratory Medicine
Xuemin Cheng, Yikang Yang, Qun Hao
The thermal environment is an important factor in the design of optical systems. This study investigated the thermal analysis technology of optical systems for navigation guidance and control in supersonic aircraft by developing empirical equations for the front temperature gradient and rear thermal diffusion distance, and for basic factors such as flying parameters and the structure of the optical system. Finite element analysis (FEA) was used to study the relationship between flying and front dome parameters and the system temperature field...
October 17, 2016: Sensors
Wenyan Ci, Yingping Huang
Visual odometry estimates the ego-motion of an agent (e.g., vehicle and robot) using image information and is a key component for autonomous vehicles and robotics. This paper proposes a robust and precise method for estimating the 6-DoF ego-motion, using a stereo rig with optical flow analysis. An objective function fitted with a set of feature points is created by establishing the mathematical relationship between optical flow, depth and camera ego-motion parameters through the camera's 3-dimensional motion and planar imaging model...
October 17, 2016: Sensors
Radu Danescu, Razvan Itu, Andra Petrovai
The driving environment is complex and dynamic, and the attention of the driver is continuously challenged, therefore computer based assistance achieved by processing image and sensor data may increase traffic safety. While active sensors and stereovision have the advantage of obtaining 3D data directly, monocular vision is easy to set up, and can benefit from the increasing computational power of smart mobile devices, and from the fact that almost all of them come with an embedded camera. Several driving assistance application are available for mobile devices, but they are mostly targeted for simple scenarios and a limited range of obstacle shapes and poses...
October 17, 2016: Sensors
Michele M Merten, M Regina Castro, Jun Zhang, Jolanta M Durski, Mabel Ryder
BACKGROUND: Cytologically defined indeterminate thyroid nodules are a diagnostic challenge. Surgical lobectomy remains gold standard for definitive diagnosis, however, 70-85% of nodules are ultimately benign. The primary objective of this study was to evaluate the negative predictive value (NPV) of F18-Fluorodeoxyglucose (FDG) positron emission computed tomography (PET/CT) in excluding cancer among cytologically indeterminate thyroid nodules within our institution using surgical pathology as a gold standard reference and to perform a systematic review of published prospective studies on the NPV of PET/CT in evaluating indeterminate thyroid nodules...
October 20, 2016: Thyroid: Official Journal of the American Thyroid Association
Mingxiong Huang, Deborah L Harrington, Ashley Robb, Annemarie Angeles, Sharon Nichols, Angela I Drake, Tao Song, Mithun Diwakar, Charles W Huang, Victoria Risbrough, Anders M Dale, Hauke Bartsch, Scott Matthews, Jeffrey W Huang, Roland R Lee, Dewleen G Baker
Blast mild traumatic brain injury (mTBI) is a leading cause of sustained impairment in military service members and Veterans. However, the mechanism of persistent disability is not fully understood. The present study investigated disturbances in brain functioning in mTBI participants using a source-imaging-based approach to analyze functional connectivity (FC) from resting-state magnetoencephalography (rs-MEG). Study participants included 26 active-duty service members or Veterans who had blast mTBI with persistent post-concussive symptoms and 22 healthy control active-duty service members or Veterans...
October 20, 2016: Journal of Neurotrauma
Rachel A Ryskin, Zhenghan Qi, Melissa C Duff, Sarah Brown-Schmidt
Verbs often participate in more than 1 syntactic structure, but individual verbs can be biased in terms of whether they are used more often with 1 structure or the other. For instance, in a sentence such as "Bop the bunny with the flower," the phrase "with the flower" is more likely to indicate an instrument with which to "bop," rather than which "bunny" to bop. Conversely, in a sentence such as "Choose the cow with the flower," the phrase "with the flower" is more likely to indicate which "cow" to choose. An open question is where these biases come from and whether they continue to be shaped in adulthood in a way that has lasting consequences for real-time processing of language...
October 20, 2016: Journal of Experimental Psychology. Learning, Memory, and Cognition
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