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https://www.readbyqxmd.com/read/28534644/a-spectral-power-analysis-of-driving-behavior-changes-during-the-transition-from-non-distraction-to-distraction
#1
Yuan Wang, Shan Bao, Wenjun Du, Zhirui Ye, James R Sayer
OBJECTIVE: This paper investigated and compared frequency-domain and time-domain characteristics of drivers' behavior before and after the start of distracted driving. METHOD: Data from an existing naturalistic driving study were used. Fast Fourier transform (FFT) was applied for the frequency domain analysis to explore drivers' behavior pattern changes between non-distracted (pre-starting of visual-manual task) and distracted (post-starting of visual-manual task) driving periods...
May 23, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28523246/targeted-presurgical-decompensation-in-patients-with-yaw-dependent-facial-asymmetry
#2
Kyung-A Kim, Ji-Won Lee, Jeong-Ho Park, Byoung-Ho Kim, Hyo-Won Ahn, Su-Jung Kim
Facial asymmetry can be classified into the rolling-dominant type (R-type), translation-dominant type (T-type), yawing-dominant type (Y-type), and atypical type (A-type) based on the distorted skeletal components that cause canting, translation, and yawing of the maxilla and/or mandible. Each facial asymmetry type represents dentoalveolar compensations in three dimensions that correspond to the main skeletal discrepancies. To obtain sufficient surgical correction, it is necessary to analyze the main skeletal discrepancies contributing to the facial asymmetry and then the skeletal-dental relationships in the maxilla and mandible separately...
May 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28521964/there-is-variability-in-our-perception-of-the-standard-head-orientation
#3
G N Hughes, J Gateño, J D English, J F Teichgraeber, J J Xia
The purposes of this study were to determine: (1) whether an observer's perception of the correct anatomical alignment of the head changes with time, and (2) whether different observers agree on the correct anatomical alignment. To determine whether the perception of the correct anatomical alignment changes with time (intra-observer comparison), a group of 30 observers were asked to orient, into anatomical alignment, the three-dimensional (3D) head photograph of a normal man, on two separate occasions. To determine whether different observers agree on the correct anatomical alignment (inter-observer comparison), the observed orientations were compared...
May 15, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28515977/establishing-normative-change-values-in-visual-acuity-loss-during-the-dynamic-visual-acuity-test
#4
Chris Marquez, Monica Lininger, Scot Raab
BACKGROUND: Baseline visual acuity (VA) loss from static to dynamic head conditions assessed using the Dynamic Visual Acuity Testing (DVAT) have not been established in NCAA football players. DVAT assesses the Vestibulo-Ocular Reflex (VOR) which is measured in Logarithm of the Minimum Angle of Resolution (logMAR). Decreased VA beyond baseline measures may detect VOR impairment and impact treatment protocols and assist in return to play decisions post-concussion. HYPOTHESIS/PURPOSE: To establish normative VA mean scores during a static head posture as well as dynamically during the DVAT with a head speed of 150 deg/s in the pitch (vertical) and yaw (horizontal) planes rotating 20 degrees in each direction...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28506677/controller-design-for-a-class-of-nonlinear-mimo-coupled-system-using-multiple-models-and-second-level-adaptation
#5
Vinay Kumar Pandey, Indrani Kar, Chitralekha Mahanta
In this paper, an adaptive control method using multiple models with second level adaptation is proposed for a class of nonlinear multi-input multi-output (MIMO) coupled systems. Multiple estimation models are used to tune the unknown parameters at the first level. The second level adaptation provides a single parameter vector for the controller. A feedback linearization technique is used to design a state feedback control. The efficacy of the designed controller is validated by conducting real time experiment on a laboratory setup of twin rotor MIMO system (TRMS)...
May 13, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28502483/a-case-report-of-wound-site-seeding-following-cholecystectomy-for-dysplastic-gallbladder
#6
Y Annalisa Ng, Qing Ting Tan, Wei Keat Wan, Yaw Chong Goh
Wound site metastasis following cholecystectomy is an uncommon but well recognised complication following laparoscopic surgery for unsuspected gallbladder carcinoma. We describe a case of implantation of dysplastic cells with subsequent malignant transformation at the incision site 3 years post-cholecystectomy for an inflamed gallbladder. Histopathological examination of this tumour confirmed adenocarcinoma of pancreatobiliary origin, possibly secondary to gallbladder cells implantation and subsequent carcinomatous change...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28502398/correlations-between-individual-susceptibility-to-visually-induced-motion-sickness-and-decaying-time-constant-of-after-nystagmus
#7
Coco C T Guo, Daniel J Z Chen, Isabella Y Wei, Richard H Y So, Raymond T F Cheung
This study examines the correlations between optokinetic after-nystagmus (OKAN) parameters and individual susceptibility to visually induced motion sickness (VIMS). Twenty-seven participants were exposed to vertical black-and-white stripes drifting along the yaw axis at 60° per second for 30 min to collect individual VIMS data (Phase 1). Two weeks after the exposure, OKANs were measured (Phase 2). 19 out of 27 participants (i.e., 70%) exhibited consistent OKAN patterns. Significant correlations between the time constants of OKAN and levels of VIMS experienced by the same viewers were found...
September 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28500810/environmental-and-behavioral-drivers-of-buruli-ulcer-disease-in-selected-communities-along-the-densu-river-basin-of-ghana-a-case-control-study
#8
Samuel Yaw Aboagye, Prince Asare, Isaac Darko Otchere, Eric Koka, George Ekow Mensah, Dzidzo Yirenya-Tawiah, Dorothy Yeboah-Manu
AbstractThe exact route of transmission of Mycobacterium ulcerans (MU) (causative agent of Buruli ulcer [BU]), risk factors, and reservoir hosts are not clearly known, although it has been identified as an environmental pathogen. This study assessed potential environmental and behavioral risk factors that influence BU infections. We conducted a case-control study where cases were matched by their demographic characteristics and place of residence. A structured questionnaire was administered to solicit information on the environmental and behavioral factors of participants that may expose them to infection...
May 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28500790/accuracy-evaluation-of-a-six-degree-of-freedom-couch-using-conebeam-ct-and-isocal-phantom-with-an-in-house-algorithm
#9
Qinghui Zhang, Joseph Driewer, Shuo Wang, Sicong Li, Xiaofeng Zhu, Dandan Zheng, Yijian Cao, Jiaju Zhang, Abolghassem Jamshidi, Brett W Cox, Jonathan P S Knisely, Louis Potters, Eric E Klein
PURPOSE: The accuracy of a Six Degree of Freedom (6DoF) couch was evaluated using a novel method. METHODS: Cone beam CT (CBCT) images of a 3D phantom (IsoCal) were acquired with different, known combinations of couch pitch and roll angles. Pitch and roll angles between the maximum allowable values of 357 and 3 degrees were tested in one degree increments. A total of 49 combinations were tested at zero degrees of yaw (couch rotation angle). The 3D positions of 16 tungsten carbide BBs, each 4 mm in diameter and arranged in a known geometry within the IsoCal phantom, were determined in the 49 image sets with in-house software...
May 13, 2017: Medical Physics
https://www.readbyqxmd.com/read/28496169/exploring-the-link-between-cadmium-and-psoriasis-in-a-nationally-representative-sample
#10
Fang-Yih Liaw, Wei-Liang Chen, Tung-Wei Kao, Yaw-Wen Chang, Ching-Fu Huang
Psoriasis, a skin inflammatory disease, originates from dysregulated interactions of the immune system. Cadmium, an environment pollutant, increases the levels of inflammation markers and influences the immune system. To clarify the relationship between cadmium and psoriasis, 5,927 participants, ≥20 years, in the National Health and Nutrition Examination Survey (NHANES) 2003-2006 were studied. Psoriasis severity was assessed using self-reported dermatology questionnaires. Cadmium was measured using blood chemistry...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28489855/haemophilus-ducreyi-dna-is-detectable-on-the-skin-of-asymptomatic-children-flies-and-fomites-in-villages-of-papua-new-guinea
#11
Wendy Houinei, Charmie Godornes, August Kapa, Sascha Knauf, Eric Q Mooring, Camila González-Beiras, Ronald Watup, Raymond Paru, Paul Advent, Sivauk Bieb, Sergi Sanz, Quique Bassat, Stanley M Spinola, Sheila A Lukehart, Oriol Mitjà
BACKGROUND: Haemophilus ducreyi and Treponema pallidum subsp. pertenue are major causes of leg ulcers in children in Africa and the Pacific Region. We investigated the presence of DNA (PCR positivity) from these bacteria on asymptomatic people, flies, and household linens in an endemic setting. METHODOLOGY/PRINCIPAL FINDINGS: We performed a cross-sectional study in rural villages of Lihir Island, Papua New Guinea during a yaws elimination campaign. Participants were asymptomatic subjects recruited from households with cases of leg ulcers, and from households without cases of leg ulcers...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28488225/distribution-and-bioaccessibility-of-metals-in-urban-soils-of-kumasi-ghana
#12
Godfred Darko, Matt Dodd, Marian Asantewah Nkansah, Eugene Ansah, Yaw Aduse-Poku
To assess the potential risk associated with incidental ingestion of metal contaminants in soils from areas where most of the commercial activities are concentrated in Kumasi, Ghana, total and bioaccessible concentrations of metals were determined in surface soil samples. Arsenic, Cr, Cu, Pb, and Zn in some of the samples exceeded international environmental soil quality guidelines. The use of geoaccumulation and enrichment factor indices also indicated high contamination in select areas of the commercial hub...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28486919/metabolic-imbalance-of-homocysteine-and-hydrogen-sulfide-in-kidney-disease
#13
O Karmin, Yaw L Siow
Homocysteine (Hcy) and hydrogen sulfide (H2S) are important molecules produced during the metabolism of sulfur-containing amino acids. Hcy metabolism is central to the supply of methyl groups that are essential for biological function. Hcy can be either regenerated to methionine or metabolized to cysteine, a precursor for glutathione synthesis. Cystathionine-β-synthase (CBS) and cystathionine-γ-lyase (CSE) play a crucial role in metabolizing Hcy to cysteine through the transsulfuration pathway. These two enzymes are also responsible for H2S generation through desulfuration reactions...
May 9, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28481900/yaws-resurgence-in-bankim-cameroon-the-relative-effectiveness-of-different-means-of-detection-in-rural-communities
#14
Alphonse Um Boock, Paschal Kum Awah, Ferdinand Mou, Mark Nichter
BACKGROUND: Yaws is an infectious, debilitating and disfiguring disease of poverty that mainly affects children in rural communities in tropical areas. In Cameroon, mass-treatment campaigns carried out in the 1950s reduced yaws to such low levels that it was presumed the disease was eradicated. In 2010, an epidemiological study in Bankim Health District detected 29 cases of yaws. Five different means of detecting yaws in clinical and community settings were initiated in Bankim over the following five years...
May 8, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28477276/compact-forceps-manipulator-with-a-spherical-coordinate-linear-and-circular-telescopic-rail-mechanism-for-endoscopic-surgery
#15
Toshikazu Kawai, Hiroyuki Hayashi, Yuji Nishizawa, Atsushi Nishikawa, Ryoichi Nakamura, Hiroshi Kawahira, Masaaki Ito, Tatsuo Nakamura
PURPOSE: By integrating locally operated small surgical robots in a sterilized area, a surgeon can perform safe and accurate robotically assisted laparoscopic surgery. At present, there is no locally operated compact forceps robot that can operate within a small space while providing a wide working area on the abdominal wall. In the present study, a new spherical-coordinate manipulator with a linear telescopic rail and two circular telescopic rails that can act as a third arm for the surgeon has been developed...
May 5, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28474606/asymmetries-in-wing-inertial-and-aerodynamic-torques-contribute-to-steering-in-flying-insects
#16
Mark Jankauski, Thomas Daniel, I Shen
Maneuvering in both natural and artificial miniature flying systems is assumed to be dominated by aerodynamic phenomena. To explore this, we develop a flapping wing model integrating aero and inertial dynamics. The model is applied to an elliptical wing similar to the forewing of the Hawkmoth Manduca sexta and realistic kinematics are prescribed. We explore critically the stroke deviation phase, as it relates to firing latency in airborne insect steering muscles which has been correlated to various aerial maneuvers...
May 5, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28460180/role-of-folate-in-non-alcoholic-fatty-liver-disease-nafld
#17
Victoria Sid, Yaw L Siow, Karmin O
Non-alcoholic fatty liver disease (NAFLD) is a spectrum of chronic liver conditions that are characterized by steatosis, inflammation, fibrosis and liver injury. The global prevalence of NAFLD is rapidly increasing in proportion to the rising incidence of obesity and type 2 diabetes. Since NAFLD is a multifaceted disorder with many underlying metabolic abnormalities, currently, there is no pharmacological agent that is therapeutically approved for the treatment of this disease. Folate is a water-soluble B vitamin that plays an essential role in one-carbon transfer reactions involved in nucleic acid biosynthesis, methylation reactions and sulfur-containing amino acid metabolism...
May 1, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28455665/cross-coupling-vestibular-stimulation-motion-sickness-and-the-vestibulo-sympathetic-reflex
#18
Fausto Romano, Nicoletta Caramia, Dominik Straumann, Eugene Nalivaiko, Giovanni Bertolini
Motion sickness is associated with a variety of autonomic symptoms, presumably due to proximity or functional interconnectivity between the autonomic centers in the brainstem and the vestibular system. A direct influence of the vestibular system on cardiovascular variables, defined as the vestibulo-sympathetic reflex, has been reported previously. Our aim was to investigate the sudomotor components of the autonomic responses associated with motion sickness during passive cross-coupling stimulation ("roll while rotating")...
April 28, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28454125/polarization-dependent-intermodal-four-wave-mixing-in-a-birefringent-multimode-photonic-crystal-fiber
#19
Jinhui Yuan, Zhe Kang, Feng Li, Guiyao Zhou, Xinzhu Sang, Qiang Wu, Binbin Yan, Xian Zhou, Kangping Zhong, Liang Wang, Kuiru Wang, Chongxiu Yu, Chao Lu, Hwa Yaw Tam, P K A Wai
In this Letter, polarization-dependent intermodal four-wave mixing (FWM) is demonstrated experimentally in a birefringent multimode photonic crystal fiber (BM-PCF) designed and fabricated in-house. Femtosecond pump pulses at wavelengths ∼800  nm polarized along one of the principal axes of the BM-PCF are coupled into a normal dispersion region away from the zero-dispersion wavelengths of the fundamental guided mode of the BM-PCF. Anti-Stokes and Stokes waves are generated in the 2nd guided mode at visible and near-infrared wavelengths, respectively...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28449202/barn-owls-maximize-head-rotations-by-a-combination-of-yawing-and-rolling-in-functionally-diverse-regions-of-the-neck
#20
Markus Krings, John A Nyakatura, Mark L L M Boumans, Martin S Fischer, Hermann Wagner
Owls are known for their outstanding neck mobility: these birds can rotate their heads more than 270°. The anatomical basis of this extraordinary neck rotation ability is not well understood. We used X-ray fluoroscopy of living owls as well as forced neck rotations in dead specimens and computer tomographic (CT) reconstructions to study how the individual cervical joints contribute to head rotation in barn owls (Tyto furcata pratincola). The X-ray data showed the natural posture of the neck, and the reconstructions of the CT-scans provided the shapes of the individual vertebrae...
April 27, 2017: Journal of Anatomy
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