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https://www.readbyqxmd.com/read/27915367/the-virtual-reality-head-mounted-display-oculus-rift-induces-motion-sickness-and-is-sexist-in-its-effects
#1
Justin Munafo, Meg Diedrick, Thomas A Stoffregen
Anecdotal reports suggest that motion sickness may occur among users of contemporary, consumer-oriented head-mounted display systems and that women may be at greater risk. We evaluated the nauseogenic properties of one such system, the Oculus Rift. The head-mounted unit included motion sensors that were sensitive to users' head movements, such that head movements could be used as control inputs to the device. In two experiments, seated participants played one of two virtual reality games for up to 15 min. In Experiment 1, 22% of participants reported motion sickness, and the difference in incidence between men and women was not significant...
December 3, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27915259/-standing-outside-the-junkie-door-service-users-experiences-of-using-community-pharmacies-to-access-treatment-for-opioid-dependency
#2
Andrew Radley, Karen Melville, Phyllis Easton, Brian Williams, John F Dillon
AIM: To explore experiences of service users attending a community pharmacy to receive opiate replacement therapy (ORT). METHOD: Qualitative study involving seven focus groups undertaken within care centres and prison educational centre in Tayside, Scotland using 41 participants. Thematic analysis undertaken of experiences of different groups of service users and carers. RESULTS: Participants described the social context surrounding attendance at community pharmacies...
December 2, 2016: Journal of Public Health
https://www.readbyqxmd.com/read/27915179/axially-uniform-magnetic-field-modulation-excitation-for-electron-paramagnetic-resonance-in-rectangular-and-cylindrical-cavities-by-slot-cutting
#3
Jason W Sidabras, James E Richie, James S Hyde
In continuous-wave (CW) Electron Paramagnetic Resonance (EPR) a low-frequency time-harmonic magnetic field, called field modulation, is applied parallel to the static magnetic field and incident on the sample. Varying amplitude of the field modulation incident on the sample has consequences on spectral line-shape and line-height over the axis of the sample. Here we present a method of coupling magnetic field into the cavity using slots perpendicular to the sample axis where the slot depths are designed in such a way to produce an axially uniform magnetic field along the sample...
November 25, 2016: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/27914849/age-related-variations-of-muscle-mass-strength-and-physical-performance-in-community-dwellers-results-from-the-milan-expo-survey
#4
Francesco Landi, Riccardo Calvani, Matteo Tosato, Anna Maria Martone, Domenico Fusco, Alex Sisto, Elena Ortolani, Giulia Savera, Sara Salini, Emanuele Marzetti
OBJECTIVES: Declining muscle mass and function are hallmarks of the aging process. The preservation of muscle trophism may protect against various negative health outcomes. Age- and sex-specific curves of muscle mass, strength, and function, using data from a large sample of community-dwelling people, are necessary. MATERIAL AND METHODS: Two surveys (Longevity Check-up and Very Important Protein [VIP]), conducted during EXPO 2015 in Milan, consisted of a population assessment aimed at evaluating the prevalence of specific health metrics in subjects outside of a research setting (n = 3206), with a special focus on muscle mass, strength, and function...
November 30, 2016: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/27914598/poor-muscle-strength-and-function-in-physically-inactive-childhood-onset-systemic-lupus-erythematosus-despite-very-mild-disease
#5
Ana Jéssica Pinto, Fabiana Braga Benatti, Hamilton Roschel, Ana Lúcia de Sá Pinto, Clovis Artur Silva, Adriana Maluf Elias Sallum, Bruno Gualano
OBJECTIVE: To compare muscle strength (i.e. lower- and upper-body strength) and function between physically inactive childhood-onset systemic lupus erythematosus patients (C-SLE) and healthy controls (CTRL). METHODS: This was a cross-sectional study and the sample consisted of 19 C-SLE (age between 9 and 18 years) and 15 CTRL matched by age, sex, body mass index (BMI), and physical activity levels (assessed by accelerometry). Lower- and upper-body strength was assessed by the one-repetition-maximum (1-RM) test...
November 2016: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/27914468/intra-individual-variability-in-day-to-day-and-month-to-month-measurements-of-physical-activity-and-sedentary-behaviour-at-work-and-in-leisure-time-among-danish-adults
#6
E S L Pedersen, I H Danquah, C B Petersen, J S Tolstrup
BACKGROUND: Accelerometers can obtain precise measurements of movements during the day. However, the individual activity pattern varies from day-to-day and there is limited evidence on measurement days needed to obtain sufficient reliability. The aim of this study was to examine variability in accelerometer derived data on sedentary behaviour and physical activity at work and in leisure-time during week days among Danish office employees. METHODS: We included control participants (n = 135) from the Take a Stand! Intervention; a cluster randomized controlled trial conducted in 19 offices...
December 3, 2016: BMC Public Health
https://www.readbyqxmd.com/read/27914181/can-sonography-be-used-to-estimate-deep-abdominal-muscle-activation-in-different-static-arm-positions-while-standing
#7
Martin Eriksson Crommert, Monica Unsgaard-Tøndel, Ottar Vasseljen
OBJECTIVES: The aim of this study was to investigate whether sonography is a reliable tool for measuring deep abdominal muscle activation in different static arm positions while standing. METHODS: Sonographic recordings were made of the transversus abdominis and obliquus internus abdominis in 4 different static arm positions that varied with regard to the postural demand and loading direction posed on the trunk. Ten nonconsecutive repetitions of each arm position were performed, and thickness measurements were made at 2 locations within each muscle...
December 3, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27913817/the-contribution-of-response-conflict-multisensory-integration-and-body-mediated-attention-to-the-crossmodal-congruency-effect
#8
Francesco Marini, Daniele Romano, Angelo Maravita
The crossmodal congruency task is a consolidated paradigm for investigating interactions between vision and touch. In this task, participants judge the elevation of a tactile target stimulus while ignoring a visual distracter stimulus that may occur at a congruent or incongruent elevation, thus engendering a measure of visuo-tactile interference (crossmodal congruency effect, CCE). The CCE reflects perceptual, attentional, and response-related factors, but their respective roles and interactions have not been set out yet...
December 2, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27913216/spatiotopic-updating-across-saccades-revealed-by-spatially-specific-fmri-adaptation
#9
Scott L Fairhall, Jens Schwarzbach, Angelika Lingnau, Martijn Gerbrand Van Koningsbruggen, David Melcher
Brain representations of visual space are predominantly eye-centred (retinotopic) yet our experience of the world is largely world-centred (spatiotopic). A long-standing question is how the brain creates continuity between these reference frames across successive eye movements (saccades). Here we use functional magnetic resonance imaging (fMRI) to address whether spatially specific repetition suppression (RS) is evident during trans-saccadic perception. We presented two successive Gabor patches (S1 and S2) in either the upper or lower visual field, left or right of fixation...
November 29, 2016: NeuroImage
https://www.readbyqxmd.com/read/27913067/the-financial-impact-of-clinic-no-show-rates-in-an-academic-pediatric-otolaryngology-practice
#10
Zhen Huang, Mariam Ashraf, Heather Gordish-Dressman, Pamela Mudd
PURPOSE: To investigate determinants of no-show rates in an academic pediatric otolaryngology practice including appointment time, age, sex, new patient status, payer mix, and median household income by zip code. MATERIALS AND METHODS: Retrospective chart review of clinic no-show rates and patient demographics in a free standing children's hospital and affiliated outpatient clinics across eight providers in a one-year period. RESULTS: Analysis shows that the overall no-show rate across all providers was 15% with the highest rate of 19% in the zip code with the lowest median income...
November 23, 2016: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/27911972/integrating-behavioral-health-into-pediatric-primary-care-implications-for-provider-time-and-cost
#11
Natasha Gouge, Jodi Polaha, Rachel Rogers, Amy Harden
OBJECTIVES: Integrating a behavioral health consultant (BHC) into primary care is associated with improved patient outcomes, fewer medical visits, and increased provider satisfaction; however, few studies have evaluated the feasibility of this model from an operations perspective. Specifically, time and cost have been identified as barriers to implementation. Our study aimed to examine time spent, patient volume, and revenue generated during days when the on-site BHC was available compared with days when the consultant was not...
December 2016: Southern Medical Journal
https://www.readbyqxmd.com/read/27911755/transformation-of-vestibular-signals-for-the-control-of-standing-in-humans
#12
Patrick A Forbes, Billy L Luu, H F Machiel Van der Loos, Elizabeth A Croft, J Timothy Inglis, Jean-Sébastien Blouin
: During standing balance, vestibular signals encode head movement and are transformed into coordinates that are relevant to maintaining upright posture of the whole body. This transformation must account for head-on-body orientation as well as the muscle actions generating the postural response. Here, we investigate whether this transformation is dependent upon a muscle's ability to stabilize the body along the direction of a vestibular disturbance. Subjects were braced on top of a robotic balance system that simulated the mechanics of standing while being exposed to an electrical vestibular stimulus that evoked a craniocentric vestibular error of head roll...
November 9, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27911558/exotic-multigap-structure-in-upt_-3-unveiled-by-a-first-principles-analysis
#13
Takuya Nomoto, Hiroaki Ikeda
A heavy-fermion superconductor UPt_{3} is a unique spin-triplet superconductor with multiple superconducting phases. Here, we provide the first report on a first-principles analysis of the microscopic superconducting gap structure. We find that the promising gap structure is an unprecedented E_{2u} state, which is completely different from the previous phenomenological E_{2u} models. Our obtained E_{2u} state has in-plane twofold vertical line nodes on small Fermi surfaces and point nodes with linear dispersion on a large Fermi surface...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27911188/tuning-the-ribosome-the-influence-of-rrna-modification-on-eukaryotic-ribosome-biogenesis-and-function
#14
Katherine E Sloan, Ahmed S Warda, Sunny Sharma, Karl-Dieter Entian, Denis L J Lafontaine, Markus T Bohnsack
Ribosomal RNAs are extensively modified during their transcription and subsequent maturation in the nucleolus, nucleus and cytoplasm. RNA modifications, which are installed either by snoRNA-guided or by stand-alone enzymes, generally stabilise the structure of the ribosome. However, they also cluster at functionally important sites of the ribosome, such as the peptidyltransferase centre and the decoding site, where they facilitate efficient and accurate protein synthesis. The recent identification of sites of substoichiometric 2'-O-methylation and pseudouridylation has overturned the notion that all rRNA modifications are constitutively present on ribosomes, highlighting nucleotide modifications as an important source of ribosomal heterogeneity...
December 2, 2016: RNA Biology
https://www.readbyqxmd.com/read/27910805/ebola-virus-vaccines-where-do-we-stand
#15
REVIEW
Vincent Pavot
The recent outbreak of Ebola virus disease in West Africa has led to more than 11,000 deaths, with a peak in mortality from August through December of 2014. A meeting convened by the World Health Organization (WHO) in September 2014, concluded that an urgent unmet need exists for efficacy and safety testing of the Ebola virus vaccine candidates and that clinical trials should be expedited. These vaccines could be used both in an outbreak setting and to provide long-term protection in populations at risk of sporadic outbreaks...
October 28, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/27910693/characterization-of-compact-toroid-injection-during-formation-translation-and-field-penetration
#16
T Matsumoto, T Roche, I Allfrey, J Sekiguchi, T Asai, H Gota, M Cordero, E Garate, J Kinley, T Valentine, W Waggoner, M Binderbauer, T Tajima
We have developed a compact toroid (CT) injector system for particle refueling of the advanced beam-driven C-2U field-reversed configuration (FRC) plasma. The CT injector is a magnetized coaxial plasma gun (MCPG), and the produced CT must cross the perpendicular magnetic field surrounding the FRC for the refueling of C-2U. To simulate this environment, an experimental test stand has been constructed. A transverse magnetic field of ∼1 kG is established, which is comparable to the C-2U axial magnetic field in the confinement section, and CTs are fired across it...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910602/study-of-a-high-power-hydrogen-beam-diagnostic-based-on-secondary-electron-emission
#17
E Sartori, A Panasenkov, P Veltri, G Serianni, R Pasqualotto
In high power neutral beams for fusion, beam uniformity is an important figure of merit. Knowing the transverse power profile is essential during the initial phases of beam source operation, such as those expected for the ITER heating neutral beam (HNB) test facility. To measure it a diagnostic technique is proposed, based on the collection of secondary electrons generated by beam-surface and beam-gas interactions, by an array of positively biased collectors placed behind the calorimeter tubes. This measurement showed in the IREK test stand good proportionality to the primary beam current...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910399/space-and-time-resolved-resistive-measurements-of-liquid-metal-wall-thickness
#18
S M H Mirhoseini, F A Volpe
In a fusion reactor internally coated with liquid metal, it will be important to diagnose the thickness of the liquid at various locations in the vessel, as a function of time, and possibly respond to counteract undesired bulging or depletion. The electrical conductance between electrodes immersed in the liquid metal can be used as a simple proxy for the local thickness. Here a matrix of electrodes is shown to provide spatially and temporally resolved measurements of liquid metal thickness in the absence of plasma...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910321/development-of-a-cryogenic-hydrogen-microjet-for-high-intensity-high-repetition-rate-experiments
#19
J B Kim, S Göde, S H Glenzer
The advent of high-intensity, high-repetition-rate lasers has led to the need for replenishing targets of interest for high energy density sciences. We describe the design and characterization of a cryogenic microjet source, which can deliver a continuous stream of liquid hydrogen with a diameter of a few microns. The jet has been imaged at 1 μm resolution by shadowgraphy with a short pulse laser. The pointing stability has been measured at well below a mrad, for a stable free-standing filament of solid-density hydrogen...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909921/high-valent-copper-in-biomimetic-and-biological-oxidations
#20
REVIEW
William Keown, J Brannon Gary, T Daniel P Stack
A long-standing debate in the Cu-O2 field has revolved around the relevance of the Cu(III) oxidation state in biological redox processes. The proposal of Cu(III) in biology is generally challenged as no spectroscopic or structural evidence exists currently for its presence. The reaction of synthetic Cu(I) complexes with O2 at low temperature in aprotic solvents provides the opportunity to investigate and define the chemical landscape of Cu-O2 species at a small-molecule level of detail; eight different types are characterized structurally, three of which contain at least one Cu(III) center...
December 1, 2016: Journal of Biological Inorganic Chemistry: JBIC
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