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Rajani Singh, Rajnish Arora, Raj Kumar
Chiari malformations (CMs) are variant structural setup of cerebellum and brain stem at the craniovertebral junction. Normally the cerebellum and parts of the brain stem lie above the foramen magnum. When the part of the cerebellum and/or brainstem protrudes into the upper spinal canal through foramen magnum, it is defined as CM. Chiari malformations may develop when part of the skull is smaller than normal or misshapen, due to which the cerebellum herniates into spinal canal through foramen magnum. This compresses the cerebellum and brainstem affecting functions controlled by these parts and blocks the flow of cerebrospinal fluid that surrounds and cushions the brain and spinal cord...
March 14, 2018: Journal of Craniofacial Surgery
Hongsheng Wang, Qun Hao, Jie Cao, Chongdao Wang, Heng Zhang, Zigu Zhou, Sihui Li
A target recognition method on retina-like laser detection and ranging images is proposed in this study. The method does not require complicated image preprocessing due to speeded-up robust features (SURF) combined with retina-like sampling as feature match descriptors. Subpixel resampling achieves optimization and avoids affecting the accuracy and precision of target recognition. Several experiments are conducted to analyze the validity of SURF directly. The separate exploration of SURF with Cartesian, log-polar (LP), and inverse LP images are discussed...
March 1, 2018: Applied Optics
Gareth Roderique-Davies, Robert M Heirene, Stephen Mellalieu, David A Shearer
Conceptual similarities have been identified between experiences of extreme sports athletes and those with drug and behavioral addictions. Evidence suggests rock climbers experience craving and other withdrawal-like states when abstinent from their sport. However, no studies have attempted to quantitatively measure the craving experienced by participants of any extreme sports. Such a measure could allow a greater understanding of the craving experienced by extreme sports athletes and a comparison of these across sports (e...
2018: Frontiers in Psychology
Elizabeth A Bowen, Andrew Irish
OBJECTIVE: We aimed to examine the food-seeking experiences of homeless emerging adults (age 18-24 years) in a US urban context. DESIGN: The study used a qualitative descriptive design, combining semi-structured interviews with a standardized quantitative measure of food insecurity. Interview data were coded using constant comparative methods to identify patterns across and within interviews. Emerging themes were confirmed and refined through member checking. SETTING: Buffalo, a mid-sized city in the Northeastern USA...
March 5, 2018: Public Health Nutrition
Joshua A Steele, A Denene Blackwood, John F Griffith, Rachel T Noble, Kenneth C Schiff
Along southern California beaches, the concentrations of fecal indicator bacteria (FIB) used to quantify the potential presence of fecal contamination in coastal recreational waters have been previously documented to be higher during wet weather conditions (typically winter or spring) than those observed during summer dry weather conditions. FIB are used for management of recreational waters because measurement of the bacterial and viral pathogens that are the potential causes of illness in beachgoers exposed to stormwater can be expensive, time-consuming, and technically difficult...
March 1, 2018: Water Research
Ulrike Böhme, Thomas D Otto, James Cotton, Sascha Steinbiss, Mandy Sanders, Samuel O Oyola, Antoine Nicot, Sylvain Gandon, Kailash P Patra, Colin Herd, Ellen Bushell, Katarzyna K Modrzynska, Oliver Billker, Joseph M Vinetz, Ana Rivero, Chris I Newbold, Matthew Berriman
Avian malaria parasites are prevalent around the world, and infect a wide diversity of bird species. Here we report the sequencing and analysis of high quality draft genome sequences for two avian malaria species, Plasmodium relictum and Plasmodium gallinaceum We identify 50 genes that are specific to avian malaria, located in an otherwise conserved core of the genome that shares gene synteny with all other sequenced malaria genomes. Phylogenetic analysis suggests that the avian malaria species form an outgroup to the mammalian Plasmodium species and using amino acid divergence between species, we estimate the avian and mammalian-infective lineages diverged in the order of 10 million years ago...
March 2, 2018: Genome Research
Qiangliang Guo, Jin Xiao, Xiaoguang Hu
Power transmission line icing (PTLI) problems, which cause tremendous damage to the power grids, has drawn much attention. Existing three-dimensional measurement methods based on binocular stereo vision was recently introduced to measure the ice thickness in PTLI, but failed to meet requirements of practical applications due to inefficient keypoint matching in the complex PTLI scene. In this paper, a new keypoint matching method is proposed based on the local multi-layer convolutional neural network (CNN) features, termed Local Convolutional Features (LCFs)...
February 26, 2018: Sensors
Erwann Lagabrielle, Agathe Allibert, Jeremy J Kiszka, Nicolas Loiseau, James P Kilfoil, Anne Lemahieu
Understanding the environmental drivers of interactions between predators and humans is critical for public safety and management purposes. In the marine environment, this issue is exemplified by shark-human interactions. The annual shark bite incidence rate (SBIR) in La Réunion (Indian Ocean) is among the highest in the world (up to 1 event per 24,000 hours of surfing) and has experienced a 23-fold increase over the 2005-2016 period. Since 1988, 86% of shark bite events on ocean-users involved surfers off the leeward coast, where 96% of surfing activities took place...
February 27, 2018: Scientific Reports
Sean R German, Martin A Edwards, Hang Ren, Henry S White
Electrochemical measurements of the nucleation rate of individual H2 bubbles at the surface of Pt nanoelectrodes (radius = 7 - 41 nm) are used to determine the critical size and geometry of H2 nuclei leading to stable bubbles. Precise knowledge of the H2 concentration at the electrode surface, C_(H_2)^surf, is obtained by controlled current reduction of H+ in a H2SO4 solution. Induction times of single-bubble nucleation events are measured by stepping the current to control C_(H_2)^surf while monitoring the voltage...
February 23, 2018: Journal of the American Chemical Society
Brendon Ferrier, Jeremy Sheppard, Oliver R L Farley, Josh L Secomb, Joanna Parsonage, Robert U Newton, Sophia Nimphius
The aim of this study was to investigate the impact of aerial manoeuvres on scoring in professional surfing. 23,631 waves were analysed for the number and types of aerial manoeuvres performed from the 2014, 2015 and 2016 Men's World Championship Tour. Additionally, the awarded score, timing and order of the aerial was also analysed. Descriptive statistics and Two Way ANOVA's were performed with Sidak Multiple Comparisons Post Hoc analysis. Results were a significantly higher score being awarded (P ≤ 0.0001) when including an aerial in competition across all three seasons...
February 22, 2018: Journal of Sports Sciences
Konstantinos Ioannidis, Matthias S Treder, Samuel R Chamberlain, Franz Kiraly, Sarah A Redden, Dan J Stein, Christine Lochner, Jon E Grant
BACKGROUND AND AIMS: Problematic internet use (PIU; otherwise known as Internet Addiction) is a growing problem in modern societies. There is scarce knowledge of the demographic variables and specific internet activities associated with PIU and a limited understanding of how PIU should be conceptualized. Our aim was to identify specific internet activities associated with PIU and explore the moderating role of age and gender in those associations. METHODS: We recruited 1749 participants aged 18 and above via media advertisements in an Internet-based survey at two sites, one in the US, and one in South Africa; we utilized Lasso regression for the analysis...
February 12, 2018: Addictive Behaviors
Renn Tumlison, Allison Surf
Adult female Guinea worms (Dracunculus spp.) usually are reported to occur singly in the extremities of their hosts, from which they deliver their larvae through fistulae in the host's skin into the water. We visually examined for presence of worms in the fascia of the limbs of skinned carcasses of 184 river otters (Lontra canadensis) harvested in Arkansas, and report observations of cysts on wrists and ankles found on 12 otters. Cysts averaged 15.6 X 24.6 mm in size, were round to oval, and contained masses of up to 19 adult female Dracunculus sp...
February 19, 2018: Journal of Parasitology
Sajib K Saha, Di Xiao, Shaun Frost, Yogesan Kanagasingam
In this paper we systematically evaluate the performance of several state-of-the-art local feature detectors and descriptors in the context of longitudinal registration of retinal images. Longitudinal (temporal) registration facilitates to track the changes in the retina that has happened over time. A wide number of local feature detectors and descriptors exist and many of them have already applied for retinal image registration, however, no comparative evaluation has been made so far to analyse their respective performance...
February 17, 2018: Journal of Medical Systems
Ramalingam Vaikundamoorthy, Rajaram Rajendran, Ananth Selvaraju, Kaviyarasan Moorthy, Santhanam Perumal
The marine bacterial strain Bacillus cereus was used to produce amylase enzyme and has excellent alkali-stable and thermostable enzymatic activity. The combined effects of pH, temperature and incubation time on amylase activity were studied using response surface methodology. The amylase enzyme activity was also determined in the presence of various metal ions, chelating agents, detergents and the results showed that the maximum enzyme activity was observed in the presence of calcium chloride (96.1%), EDTA (63...
February 12, 2018: Bioorganic Chemistry
Erica Schvirtz, Laurent Bensoussan, Bertrand Tourret Couderc, Jean-Michel Viton, Alain Delarque, Marjorie Kerzoncuf
BACKGROUND: Surfing with transfemoral knee prosthesis requires flexion of the hip, knee, and ankle and balance between flexibility and stiffness of the prosthetic limb. We report on Mr D, a transfemoral amputee, who wanted to surf again. Case Description and Methods: Technical specifications were based on Mr D's complaint. The prosthesis is salt water resistant and combines a shock absorber associated with elastic tendons to permit the knee to bend easily and to facilitate eccentric braking...
February 1, 2018: Prosthetics and Orthotics International
Seong-Soo Cha, Bo-Kyung Seo
This study aimed to examine smartphone use patterns, smartphone addiction characteristics, and the predictive factors of the smartphone addiction in middle school students in South Korea. According to the Smartphone Addiction Proneness Scale scores, 563 (30.9%) were classified as a risk group for smartphone addiction and 1261 (69.1%) were identified as a normal user group. The adolescents used mobile messengers for the longest, followed by Internet surfing, gaming, and social networking service use. The two groups showed significant differences in smartphone use duration, awareness of game overuse, and purposes of playing games...
January 2018: Health Psychology Open
A Dudina, S Lane, M Butler, M-T Cooney, I Graham
Background: Cardiovascular disease (CVD) is the leading cause of death in patients with chronic obstructive pulmonary disease (COPD) and such patients tend to carry a heavy burden of risk factors for CVD. There is little information on the documentation and management of CVD risk factors in COPD patients. Aim: To audit the recording and management of CVD risk factors in 200 COPD patients attending the respiratory out-patient clinics at two University teaching hospitals...
February 8, 2018: QJM: Monthly Journal of the Association of Physicians
Yaniv Steinfeld, Yaniv Keren, Elias Haddad
Introduction: Central cord syndrome (CCS) is an injury to the center of the spinal cord. It is well known as a hyperextension injury, but it has never been described as a surfing injury. Our report describes this injury in detail. Case presentation: A 35-year-old male novice surfer presented to the emergency department with acute tetraplegia following falling off his surfboard and hitting sea floor at a shallow beach break. He was rescued by a fellow surfer while floating in the sea and unable to raise his head above sea level...
2018: Spinal Cord Series and Cases
Stacey Willcox-Pidgeon, Bridget Kool, Kevin Moran
In many countries, beaches are a high-risk location for drowning. In New Zealand, youth and young adults are particularly at risk of drowning at beaches, accounting for 17.4% of drowning deaths and 18.4% of rescues at surf beaches between 2008 and 2013, over 90% of fatalities were male. This study explored New Zealand youth risk perceptions of drowning and their coping appraisal processes at a surf beach. A cross-sectional survey of high school students (n = 599) was conducted between February and April 2014...
February 8, 2018: International Journal of Injury Control and Safety Promotion
S Sadaf Soloukey Tbalvandany, A Alexander P W M Maat, R Robin Cornelissen, J Joost J M E Nuyttens, J Johanna J M Takkenberg
OBJECTIVE: Malignant Mesothelioma (MM) is a rare asbestos related disease mostly diagnosed in low-skilled patients. The decision-making process for MM treatment is complicated, making an adequate provision of information necessary. The objective of this study is to assess the content and quality of online informational resources available for Dutch MM patients. METHODS: The first 100 hits of a Google search were studied using the JAMA benchmarks, the Modified Information Score (MIS) and the International Patient Decision Aid Standard Scoring (IPDAS)...
January 29, 2018: Patient Education and Counseling
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