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Xiaoshu Lü, Esa-Pekka Takala, Esko Toppila, Ykä Marjanen, Leena Kaila-Kangas, Tao Lu
Exposure to whole-body vibration (WBV) presents an occupational health risk and several safety standards obligate to measure WBV. The high cost of direct measurements in large epidemiological studies raises the question of the optimal sampling for estimating WBV exposures given by a large variation of exposure levels in real worksites. This paper presents a new approach to address this problem. A daily exposure to WBV was recorded for 9 to 24 days among 48 all-terrain vehicle drivers. Four datasets based on root mean squared recordings were obtained from the measurement...
October 25, 2016: Ergonomics
Marta Franceschi, Lucia Seminara, Strahinja Dosen, Matjia Strbac, Maurizio Valle, Dario Farina
Myoelectric prostheses are successfully controlled using muscle electrical activity, thereby restoring lost motor functions. However, the somatosensory feedback from the prosthesis to the user is still missing. The sensory substitution methods described in the literature comprise mostly simple position and force sensors combined with discrete stimulation units. The present study describes a novel system for sophisticated electrotactile feedback integrating advanced distributed sensing (electronic skin) and stimulation (matrix electrodes)...
October 19, 2016: IEEE Transactions on Haptics
Paibul Suriyawongpaisal, Wichai Aekplakorn, Samrit Srithamrongsawat, Chaisit Srithongchai, Orawan Prasitsiriphon, Rassamee Tansirisithikul
BACKGROUND: Although bodies of evidence on copayment effects on access to care and quality of care in general have not been conclusive, allowing copayment in the case of emergency medical conditions might pose a high risk of delayed treatment leading to avoidable disability or death. METHODS: Using mixed-methods approach to draw evidence from multiple sources (over 40,000 records of administrative dataset of Thai emergency medical services, in-depth interviews, telephone survey of users and documentary review), we are were able to shed light on the existence of copayment and its related factors in the Thai healthcare system despite the presence of universal health coverage since 2001...
October 21, 2016: BMC Health Services Research
B L Altshuler, E Cuevas, L B Ioffe, V E Kravtsov
We combine numerical diagonalization with semianalytical calculations to prove the existence of the intermediate nonergodic but delocalized phase in the Anderson model on disordered hierarchical lattices. We suggest a new generalized population dynamics that is able to detect the violation of ergodicity of the delocalized states within the Abou-Chakra, Anderson, and Thouless recursive scheme. This result is supplemented by statistics of random wave functions extracted from exact diagonalization of the Anderson model on ensemble of disordered random regular graphs (RRG) of N sites with the connectivity K=2...
October 7, 2016: Physical Review Letters
Jafra D Thomas, J Mark Vanness, Bradley J Cardinal
The purpose of this study was to perform a construct validity assessment of Kendzierski's exercise self-schema theory questionnaire using objective measures of health-related physical fitness. This study tested the hypothesis that individuals with an exercise self-schema would possess significantly greater physical fitness than those who did not across three domains of health-related physical fitness: Body composition, cardiovascular fitness, and upper-body muscular endurance. Undergraduate student participants from one private university on the west coast of the United States completed informed consent forms and the exercise self-schema questionnaire within a classroom setting or at an on-campus outside tabling session...
2016: International Journal of Exercise Science
Armando H Norman, Andrew J Russell, Claudia Merli
The UK's Quality and Outcomes Framework (QOF) is the largest pay-for-performance scheme in the world. This ethnographic study explored how QOF's monetary logic influences the approach to healthcare in UK general practice. From August 2013 to April 2014, we researched two UK general practice surgeries and one general practice training programme. These environments provided the opportunity for studying various spaces such as QOF meetings, consultation rooms, QOF recoding sessions, and the collection of computer-screen images depicting how patients' biomarkers are evaluated and costed through software systems...
October 11, 2016: Social Science & Medicine
Uwe Schneider, Fabiano Vasi, Jürgen Besserer
BACKGROUND AND PURPOSE: When fractionation schemes for hypofractionation and stereotactic body radiotherapy are considered, a reliable cell survival model at high dose is needed for calculating doses of similar biological effectiveness. An alternative to the LQ-model is the track-event theory which is based on the probabilities for one- and two two-track events. A one-track-event (OTE) is always represented by at least two simultaneous double strand breaks. A two-track-event (TTE) results in one double strand break...
2016: PloS One
Lin Zhao, Dongxue Guan, Jianhua Cheng, Xiaomin Xu, Zaihui Fei
A ship experiences the random motion of sea waves during its travels. Hence, the coarse alignment of the marine strapdown Inertial Navigation System (INS) suffers from rocking disturbances such as pitch and roll. In this paper, a novel approach of marine coarse alignment was proposed for avoiding the resulting loss of accuracy from rocking disturbances. Unlike several current techniques, our alignment scheme is intuitional and concise. Moreover, the coarse alignment can be implemented without any external information...
October 15, 2016: Sensors
Oladapo Yeku, Susan F Slovin
Immunotherapy for castration-resistant prostate cancer has continued to be an area of active research over the last several years. The enthusiasm of this approach has been based on the assumption of better tolerability and that using the body's own immune system may be more effective than either hormonal or chemotherapy. Sipuleucel-T, a dendritic cell-based vaccine, is the only approved agent in this class for the management of castrate-resistant prostate cancer. Although sipuleucel-T increases overall survival without any significant changes in progression-free survival, other forms of immunotherapy such as PSA-TRICOM, ipilimumab, and chimeric antigen receptor T cell therapy are in advanced stages of clinical development...
September 2016: Cancer Journal
Martin J MacInnis, Martin J Gibala
Interval exercise typically involves repeated bouts of relatively intense exercise interspersed by short periods of recovery. A common classification scheme subdivides this method into high-intensity interval training (HIIT; 'near maximal' efforts) and sprint interval training (SIT; 'supramaximal' efforts). Both forms of interval training induce the classic physiological adaptations characteristic of moderate-intensity continuous training (MICT) such as increased aerobic capacity (VO2max ) and mitochondrial content...
October 17, 2016: Journal of Physiology
P B Persson
My tailor suggests I should dress for the body I have, not for the body I want. Conversely, Acta Physiologica's lean and muscular build calls for streamlining her appearance. Over the latest years, Acta Physiologica has been ranked highly among the physiology journals.(1,2) Our readers have increasingly downloaded our articles, and many more manuscripts have been submitted year-by-year.(3-5) Reflecting these changes, more persons read Acta Physiologica out of general interest, and not only to stay on top of their fields...
October 11, 2016: Acta Physiologica
Meret Branscheidt, Juliane Schneider, Patrik Michel, Elissavet Eskioglou, Georg Kaegi, Robert Stark, Urs Fischer, Simon Jung, Marcel Arnold, Maria Wertli, Ulrike Held, Susanne Wegener, Andreas Luft, Hakan Sarikaya
BACKGROUND AND PURPOSE: The impact of excess body weight on prognosis after stroke is controversial. Many studies report higher survival rates in obese patients ("obesity paradox"). Recently, obesity has been linked to worse outcomes after intravenous (IV) thrombolysis, but the number and sample size of these studies were small. Here, we aimed to assess the relationship between body weight and stroke outcome after IV thrombolysis in a large cohort study. METHODS: In a prospective observational multicenter study, we analyzed baseline and outcome data of 896 ischemic stroke patients who underwent IV thrombolysis...
2016: PloS One
Shahab Shahdoost, Randolph Nudo, Pedram Mohseni
Brain-machine-body interfaces (BMBIs) aim to create an artificial connection in the nervous system by converting neural activity recorded from one cortical region to electrical stimuli delivered to another cortical region, spinal cord, or muscles in real-time. In particular, conditioning-mode BMBIs utilize such activity-dependent stimulation strategies to induce functional re-organization in the nervous system and promote functional recovery after injury by exploiting mechanisms underlying neuroplasticity. This paper reports on reconfigurable, field-programmable gate array (FPGA)-based implementation of a translation algorithm to extract multichannel stimulus trigger signals from intracortical neural spike activity...
October 5, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
Yuezhi Mao, Omar Demerdash, Martin Head-Gordon, Teresa Head-Gordon
AMOEBA is a molecular mechanics force field that addresses some of the shortcomings of a fixed partial charge model, by including permanent atomic point multipoles through quadrupoles, as well as many-body polarization through the use of point inducible dipoles. In this work we investigate how well AMOEBA formulates its non-bonded interactions, and how it implicitly incorporates quantum mechanical effects such as charge penetration (CP) and charge transfer (CT), for water-water and water-ion interactions. We find that AMOEBA's total interaction energies as a function of distance and over angular scans for the water dimer and for a range of water-monovalent cations agree well with an advanced density functional theory (DFT) model, whereas the water-halides and water- divalent cations show significant disagreement with the DFT result, especially in the compressed region when the two fragments overlap...
October 6, 2016: Journal of Chemical Theory and Computation
Anyembe Andrew Omala, Niyifasha Robert, Fagen Li
Wireless body area network (WBANs) is composed of sensors that collect and transmit a person's physiological data to health-care providers in real-time. In order to guarantee security of this data over open networks, a secure data transmission mechanism between WBAN and application provider's servers is of necessity. Modified medical data does not provide a true reflection of an individuals state of health and its subsequent use for diagnosis could lead to an irreversible medical condition. In this paper, we propose a lightweight certificateless signcryption scheme for secure transmission of data between WBAN and servers...
November 2016: Journal of Medical Systems
Leonid A Solovyov
The structure of benzene:ethane co-crystal at 90 K is refined with anisotropic displacement parameters without geometric restraints from high-resolution synchrotron X-ray powder diffraction (XRPD) data using the derivative difference method (DDM) with properly chosen weighting schemes. The average C-C bond precision achieved is 0.005 Å and the H-atom positions in ethane are refined independently. A new DDM weighting scheme is introduced that compensates for big distortions of experimental data. The results are compared with density functional theory (DFT) calculations reported by Maynard-Casely et al...
October 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
Philipp Uhl, Lea A Franke, Christina Rehberg, Claudia Wollmann, Peter Stahlschmidt, Lukas Jeker, Carsten A Brühl
Wild and domesticated bee species are exposed to a variety of pesticides which may drive pollinator decline. Due to wild bee sensitivity data shortage, it is unclear if the honey bee Apis mellifera is a suitable surrogate species in the current EU risk assessment scheme. Furthermore, the underlying causes for sensitivity differences in bees are not established. We assessed the acute toxicity (median lethal dose, LD50) of dimethoate towards multiple bee species, generated a species sensitivity distribution and derived a hazardous dose (HD5)...
September 30, 2016: Scientific Reports
Mary Casey, Adeline Cooney, Rhona O' Connell, Josephine Hegarty, Anne-Marie Brady, Pauline O'Reilly, Catriona Kennedy, Elizabeth Heffernan, Gerard Fealy, Martin Mcnamara, Laserina O' Connor
AIM: To present the qualitative findings from a study on the development of scheme(s) to provide evidence of maintenance of professional competence for nurses and midwives. BACKGROUND: Key issues in maintenance of professional competence include notions of self- assessment, verification of engagement and practice hours, provision of an evidential record, the role of the employer and articulation of possible consequences for non-adherence with the requirements. Schemes to demonstrate the maintenance of professional competence have application to nurses, midwives and regulatory bodies and healthcare employers worldwide...
September 29, 2016: Journal of Advanced Nursing
Thomas Küstner, Christian Würslin, Martin Schwartz, Petros Martirosian, Sergios Gatidis, Cornelia Brendle, Ferdinand Seith, Fritz Schick, Nina F Schwenzer, Bin Yang, Holger Schmidt
PURPOSE: To enable fast and flexible high-resolution four-dimensional (4D) MRI of periodic thoracic/abdominal motion for motion visualization or motion-corrected imaging. METHODS: We proposed a Cartesian three-dimensional k-space sampling scheme that acquires a random combination of k-space lines in the ky/kz plane. A partial Fourier-like constraint compacts the sampling space to one half of k-space. The central k-space line is periodically acquired to allow an extraction of a self-navigated respiration signal used to populate a k-space of multiple breathing positions...
September 25, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Arsenoi P Ladia, Spyros G Skiadopoulos, Anna Ν Karahaliou, Gerasimos A T Messaris, Harry B Delis, George S Panayiotakis
Radiation protection is of particular importance in paediatric radiology. In this study, the influence of increased body mass index (BMI) in radiation dose and associated risk was investigated for paediatric patients aged 5-6.5 years, undergoing chest (64 patients) or abdomen (64 patients) radiography. Patients were categorized into normal and overweight, according to the BMI classification scheme. Entrance surface dose (ESD), organ dose, effective dose (ED) and risk of exposure induced cancer death (REID) were calculated using the Monte Carlo based code PCXMC 2...
October 2016: European Journal of Radiology
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