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https://www.readbyqxmd.com/read/28306288/experimental-observation-of-anisotropic-adler-bell-jackiw-anomaly-in-type-ii-weyl-semimetal-wte_-1-98-crystals-at-the-quasiclassical-regime
#1
Yang-Yang Lv, Xiao Li, Bin-Bin Zhang, W Y Deng, Shu-Hua Yao, Y B Chen, Jian Zhou, Shan-Tao Zhang, Ming-Hui Lu, Lei Zhang, Mingliang Tian, L Sheng, Yan-Feng Chen
The asymmetric electron dispersion in type-II Weyl semimetal theoretically hosts anisotropic transport properties. Here, we observe the significant anisotropic Adler-Bell-Jackiw (ABJ) anomaly in the Fermi-level delicately adjusted WTe_{1.98} crystals. Quantitatively, C_{W}, a coefficient representing the intensity of the ABJ anomaly along the a and b axis of WTe_{1.98} are 0.030 and 0.051  T^{-2} at 2 K, respectively. We found that the temperature-sensitive ABJ anomaly is attributed to a topological phase transition from a type-II Weyl semimetal to a trivial semimetal, which is verified by a first-principles calculation using experimentally determined lattice parameters at different temperatures...
March 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28298126/magnetic-gaps-in-organic-tri-radicals-from-a-simple-model-to-accurate-estimates
#2
Vincenzo Barone, Ivo Cacelli, Alessandro Ferretti, Giacomo Prampolini
The calculation of the energy gap between the magnetic states of organic poly-radicals still represents a challenging playground for quantum chemistry, and high-level techniques are required to obtain accurate estimates. On these grounds, the aim of the present study is twofold. From the one side, it shows that, thanks to recent algorithmic and technical improvements, we are able to compute reliable quantum mechanical results for the systems of current fundamental and technological interest. From the other side, proper parameterization of a simple Hubbard Hamiltonian allows for a sound rationalization of magnetic gaps in terms of basic physical effects, unraveling the role played by electron delocalization, Coulomb repulsion, and effective exchange in tuning the magnetic character of the ground state...
March 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28290375/angle-dependent-magnetoresistance-and-quantum-oscillations-in-high-mobility-semimetal-luptbi
#3
Guizhou Xu, Zhipeng Hou, Yue Wang, Xiaoming Zhang, Hongwei Zhang, Enke Liu, X Xi, Feng Xu, Guangheng Wu, Xixiang Zhang, Wenhong Wang
The recent discovery of ultrahigh mobility and large positive magnetoresistance in topologically non-trivial Half-Heusler semimetal LuPtBi provides a unique playground for studying exotic physics and significant perspective for device applications. As an fcc-structured electron-hole-compensated semimetal, LuPtBi theoretically exhibits six symmetrically arranged anisotropic electron Fermi pockets and two nearly-spherical hole pockets, offering the opportunity to explore the physics of Fermi surface with a simple angle-related magnetotransport properties...
March 14, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28278148/notes-from-the-field-an-outbreak-of-salmonella-typhimurium-associated-with-playground-sand-in-a-preschool-setting-madrid-spain-september-october-2016
#4
Carmen Olmedo Lucerón, Ana Pérez Meixeira, Isabel Abad Sanz, Victoria Cid Deleyto, Silvia Herrera León, Leonor Gutierrez Ruiz
No abstract text is available yet for this article.
March 10, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28260182/brief-report-examining-executive-and-social-functioning-in-elementary-aged-children-with-autism
#5
Laura MacMullen Freeman, Jill Locke, Erin Rotheram-Fuller, David Mandell
There is a paucity of literature examining the relationship between executive and social functioning in children with autism spectrum disorder (ASD). Twenty-three school-aged children with ASD participated. Executive functioning was measured using the Developmental Neuropsychological Assessment, Second Edition and Differential Ability Scales, Second Edition, and the teacher-rated Behavior Rating of Inventory of Executive Function. Independent assessors observed children's social functioning on the playground while children with ASD and their peers completed a survey to measure peer friendships and rejections...
March 4, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28186099/the-effect-of-increasing-risk-and-challenge-in-the-school-playground-on-physical-activity-and-weight-in-children-a-cluster-randomised-controlled-trial-play
#6
V L Farmer, S M Williams, J I Mann, G Schofield, J C McPhee, R W Taylor
BACKGROUND: To investigate whether changing the play environment in primary schools to one that includes greater risk and challenge increases physical activity and reduces body mass index (BMI). SUBJECTS/METHODS: A two-year cluster randomised controlled trial was undertaken in 16 New Zealand schools (Years 1-8). Intervention schools (n=8) redesigned their play environments to encourage imaginative and independent free play by increasing opportunities for risk and challenge (e...
February 10, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28185996/rationale-design-and-baseline-data-of-a-cross-national-randomized-trial-on-the-effect-of-built-shade-in-public-parks-for-sun-protection
#7
David B Buller, Suzanne Dobbinson, Dallas R English, Melanie Wakefield, Mary Klein Buller
Environments can be structured to reduce solar ultraviolet radiation (UV) exposure to prevent skin cancer. A prospective randomized trial is being conducted to test whether introducing shade sails in passive recreation areas (PRAs) in public parks will increase use and decrease UV exposure in the shaded compared to unshaded PRAs. Shade effects will be compared between Melbourne, Australia and Denver, USA. The trial enrolled 145 public parks with PRAs suitable for shade construction and randomized parks to intervention or control in a 1:3 ratio...
April 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28169154/motor-competence-and-characteristics-within-the-preschool-environment
#8
Larissa True, Karin Allor Pfeiffer, Marsha Dowda, Harriet G Williams, William H Brown, Jennifer R O'Neill, Russell R Pate
OBJECTIVES: Environmental characteristics within preschools that influence children's motor competence are largely unknown. The purpose of the present study was to examine the contribution of various preschool environmental characteristics to children's locomotor, object control, and total gross motor scores. DESIGN: Cross-sectional, observational study of 3-5 year-old children (n=229) from 22 preschools in South Carolina. METHODS: The Children's Activity and Movement in Preschool Study (CHAMPS) Motor Skills Protocol assessed MC...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28152362/shared-use-of-physical-activity-facilities-among-north-carolina-faith-communities-2013
#9
Annie Hardison-Moody, Michael B Edwards, Jason N Bocarro, Anna Stein, Michael A Kanters, Danielle Marie Sherman, Lori K Rhew, Willona Marie Stallings, Sarah K Bowen
INTRODUCTION: Shared use of recreational facilities is a promising strategy for increasing access to places for physical activity. Little is known about shared use in faith-based settings. This study examined shared use practices and barriers in faith communities in North Carolina. METHODS: Faith communities in North Carolina (n = 234) completed an online survey (October-December 2013) designed to provide information about the extent and nature of shared use of recreational facilities...
February 2, 2017: Preventing Chronic Disease
https://www.readbyqxmd.com/read/28146440/sudden-collapse-of-a-preschool-aged-child-on-the-playground
#10
RoseAnn L Scheller, Laurie H Johnson, Michelle C Caruso, Angela Lorts
PURPOSE: Primary cardiac events are rare in children. There is little information in the literature regarding the most appropriate emergency department (ED) management of this type of pediatric patient, especially with regard to medication use. SUMMARY: This case highlights the pediatric ED evaluation and treatment of sudden collapse in a child with an ultimate diagnosis of hypertrophic cardiomyopathy. Cardiac disorders represent 2% to 6% of cases of pediatric syncope presenting to EDs, particularly if there are previous prodromal symptoms and/or a history of exertion...
February 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28145660/playground-equipment-related-injuries-in-preschool-aged-children-emergency-department-based-injury-in-depth-surveillance
#11
Sohyun Bae, Ji Sook Lee, Kyung Hwan Kim, Junseok Park, Dong Wun Shin, Hyunjong Kim, Joon Min Park, Hoon Kim, Woochan Jeon
In this study, we investigated playground equipment related injuries in preschool-aged children. This was a retrospective observational study using Emergency Department based Injury In-depth Surveillance, (2011-2014). We included the preschool-aged children with playground equipment related injuries. We surveyed the mechanism and incidence of injuries, and estimated the odds ratio (OR) of traumatic brain injury (TBI) and upper/lower extremities fracture. There were 6,110 patients, mean age was 4.14 ± 1.95 years old...
March 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28141716/apraxia-autism-attention-deficit-hyperactivity-disorder-do-we-have-a-new-spectrum
#12
Jayna Schumacher, Kristine E Strand, Marilyn Augustyn
Gio is a bilingual 6-year 10-month-old boy new to your practice who presents for an unscheduled visit with concerns for speech and language delay. He was born in Portugal, and his native language is Portuguese. When he was 21 months old, his family moved to Italy and then moved to the United States 3 years later. He had very little contact with other children while living in Italy, but his parents report that he has made friends quickly in the United States. His family speaks Portuguese at home, although his father is fluent in English...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28134516/cytosine-nucleobase-ligand-a-suitable-choice-for-modulating-magnetic-anisotropy-in-tetrahedrally-coordinated-mononuclear-co-ii-compounds
#13
Rosaria Bruno, Julia Vallejo, Nadia Marino, Giovanni De Munno, J Krzystek, Joan Cano, Emilio Pardo, Donatella Armentano
A family of tetrahedral mononuclear Co(II) complexes with the cytosine nucleobase ligand is used as the playground for an in-depth study of the effects that the nature of the ligand, as well as their noninnocent distortions on the Co(II) environment, may have on the slow magnetic relaxation effects. Hence, those compounds with greater distortion from the ideal tetrahedral geometry showed a larger-magnitude axial magnetic anisotropy (D) together with a high rhombicity factor (E/D), and thus, slow magnetic relaxation effects also appear...
February 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28116590/relationship-between-recreational-resources-in-the-school-neighborhood-and-changes-in-fitness-in-new-york-city-public-school-students
#14
Carla P Bezold, James H Stark, Andrew Rundle, Kevin Konty, Sophia E Day, James Quinn, Kathryn Neckerman, Ana V Diez Roux
Physical fitness in children has many beneficial effects, including the maintenance of a healthy weight. The built environment may influence youths' physical fitness by encouraging physical activity. This paper assessed whether higher density of parks, playgrounds, and sports facilities around a school is related to improvements in fitness in middle school boys and girls. Fitness scores and other student covariates collected as part of NYC FITNESSGRAM between the 2006-2007 and 2010-2011 school years were linked with school neighborhood data on characteristics of the built environment for NYC public school students in grades 6-8...
February 2017: Journal of Urban Health: Bulletin of the New York Academy of Medicine
https://www.readbyqxmd.com/read/28115175/distribution-and-dynamics-of-soil-contamination-with-toxocara-canis-and-toxocara-cati-eggs-in-poland-and-prevention-measures-proposed-after-20-years-of-study
#15
Hanna Mizgajska-Wiktor, Wojciech Jarosz, Renata Fogt-Wyrwas, Agnieszka Drzewiecka
The studies conducted in the years 1994-2013 allowed to determine the distribution of Toxocara spp. eggs in the soil of different types of urban and rural areas in Poland and to establish seasonal and multi-year dynamics of soil contamination with T. cati and T. canis eggs. Out of 3309 soil samples examined, 14.9% contained the eggs and the average density was 3.43 eggs/100g of soil. The level of soil contamination was the highest in cities, lower in villages, and lowest in small towns. In urban areas eggs of T...
January 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28112895/flexible-all-inorganic-perovskite-cspbbr3-nonvolatile-memory-device
#16
Dongjue Liu, Qiqi Lin, Zhigang Zang, Ming Wang, Peihua Wangyang, Xiaosheng Tang, Miao Zhou, Wei Hu
All-inorganic perovskite CsPbX3 (X = Cl, Br, or I) is widely used in a variety of photoelectric devices such as solar cells, light-emitting diodes, lasers, and photodetectors. However, studies to understand the flexible CsPbX3 electrical application are relatively scarce, mainly due to the limitations of the low-temperature fabricating process. In this study, all-inorganic perovskite CsPbBr3 films were successfully fabricated at 75 °C through a two-step method. The highly crystallized films were first employed as a resistive switching layer in the Al/CsPbBr3/PEDOT:PSS/ITO/PET structure for flexible nonvolatile memory application...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28106057/improper-electric-polarization-in-simple-perovskite-oxides-with-two-magnetic-sublattices
#17
Hong Jian Zhao, L Bellaiche, Xiang Ming Chen, Jorge Íñiguez
ABO3 perovskite oxides with magnetic A and B cations offer a unique playground to explore interactions involving two spin sublattices and the emergent effects they may drive. Of particular interest is the possibility of having magnetically driven improper ferroelectricity, as in the much studied families of rare-earth orthoferrites and orthochromites; yet, the mechanisms behind such effects remain to be understood in detail. Here we show that the strongest polar order corresponds to collinear spin configurations and is driven by non-relativistic exchange-strictive mechanisms...
January 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28097673/schoolyard-shade-and-sun-exposure-assessment-of-personal-monitoring-during-children-s-physical-activity
#18
Jennifer K Vanos, Grant R McKercher, Kylie Naughton, Marc Lochbaum
Childhood exposure to ultraviolet radiation (UVR) is a major risk factor for the development of melanoma later in life. However, it is challenging to accurately determine personal outdoor exposure to UVR, specifically erythemally weighted UVR (UVEry ), due to technological constraints, variable time-activity patterns, and the influence of outdoor environmental design. To address this challenge, this study utilized mobile and stationary techniques to examine the UVEry exposures of 14 children in a schoolyard in Lubbock, TX, in spring 2016...
January 18, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28056908/an-evaluation-of-outdoor-school-environments-to-promote-physical-activity-in-delhi-india
#19
Samiksha Tarun, Monika Arora, Tina Rawal, Sara E Benjamin Neelon
BACKGROUND: Increasing physical activity in children is an important public health goal in India. Schools may be a target for physical activity promotion, but little is known about outdoor school environments. The purpose of this study was to describe characteristics of the surrounding outdoor school environments that may promote children's physical activity in Delhi, India. METHODS: For this cross-sectional study, we conducted a structured observation of outdoor school environments in a random sample of 16 private schools in Delhi, India using the Sport, Physical activity and Eating behavior: Environmental Determinants in Young people (SPEEDY) audit tool...
January 5, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28042643/the-role-of-adult-perceptions-and-supervision-behavior-in-preventing-child-injury
#20
Ha T Huynh, Natalie E Demeter, Rita V Burke, Jeffrey S Upperman
Supervision is an important factor in reducing injury risk. There are multiple factors that can affect the appropriate level of supervision including risk perception, anticipation of injury, and distracted behaviors. This study examined the perceived risks of child injury among parents and child caregivers and their supervision behavior among adults in an urban playground. Participant data from 25 individuals were collected through observations and anonymous self-reported surveys. More than half of the participants indicated practice of appropriate supervisory behavior, including attentiveness to their child's behavior and proximity to their child during play...
January 2, 2017: Journal of Community Health
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