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https://www.readbyqxmd.com/read/29443004/magnetic-order-of-nd-sub-5-sub-pb-sub-3-sub-single-crystals
#1
Jiaqiang Yan, Masayuki Ochi, Huibo Cao, Bayrammurad Saparov, Jinguang Cheng, Yoshiya Uwatoko, Ryotaro Arita, Brian C Sales, David G Mandrus
We grow millimeter-sized Nd$_5$Pb$_3$ single crystals out of a Nd-Co flux. We experimentally study the magnetic order of Nd$_5$Pb$_3$ single crystals by measuring the anisotropic magnetic properties, electrical resistivity under high pressure up to 8\,GPa, specific heat, and neutron single crystal diffraction. Two successive magnetic orders are observed at T$_{N1}$=44\,K and T$_{N2}$=8\,K. The magnetic cells can be described with a propagation vector \textit{k}=(0.5,0,0). Cooling below T$_{N1}$, Nd1 and Nd3 order forming ferromagnetic stripes along the \textit{b}-axis, and the ferromagnetic stripes are coupled antiferromagnetically along the \textit{a}-axis for the \textit{k}=(0...
February 14, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29437431/effective-landau-level-diagram-of-bilayer-graphene
#2
Jing Li, Yevhen Tupikov, Kenji Watanabe, Takashi Taniguchi, Jun Zhu
The E=0 octet of bilayer graphene in the filling factor range of -4<ν<4 is a fertile playground for many-body phenomena, yet a Landau level diagram is missing due to strong interactions and competing quantum degrees of freedom. We combine measurements and modeling to construct an empirical and quantitative spectrum. The single-particlelike diagram incorporates interaction effects effectively and provides a unified framework to understand the occupation sequence, gap energies, and phase transitions observed in the octet...
January 26, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29435208/reasonable-outcome-of-avulsed-permanent-upper-incisor-after-seven-years-follow-up-period-a-case-report
#3
Egle Bendoraitiene, Sandra Zemgulyte, Marija Borisovaite
Background: Avulsion of the permanent teeth is one of the most serious oral health problems among active children and adolescents. Traumatized patients require immediate and correct treatment in order to restore damaged structures and function that have major impact on daily patient's life. As a result, proper guidelines and fast treatment methods are necessary. This case report discusses treatment of maxillary right central incisor with an open apex that had been avulsed and replanted...
October 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/29426302/the-relationship-of-undernutrition-psychosocial-factors-and-developmental-outcomes-of-children-in-extreme-poverty-in-ethiopia
#4
Berhanu Nigussie Worku, Teklu Gemechu Abessa, Mekitie Wondafrash, Marleen Vanvuchelen, Liesbeth Bruckers, Patrick Kolsteren, Marita Granitzer
BACKGROUND: Extreme poverty is severe deprivation of basic needs and services. Children living in extreme poverty may lack adequate parental care and face increased developmental and health risks. However, there is a paucity of literature on the combined influences of undernutrition and psychosocial factors (such as limited play materials, playground, playtime, interactions of children with their peers and mother-child interaction) on children's developmental outcomes. The main objective of this study was, therefore, to ascertain the association of developmental outcomes and psychosocial factors after controlling nutritional indices...
February 9, 2018: BMC Pediatrics
https://www.readbyqxmd.com/read/29410470/optical-imaging-of-strain-in-two-dimensional-crystals
#5
Lukas Mennel, Marco M Furchi, Stefan Wachter, Matthias Paur, Dmitry K Polyushkin, Thomas Mueller
Strain engineering is widely used in material science to tune the (opto-)electronic properties of materials and enhance the performance of devices. Two-dimensional atomic crystals are a versatile playground to study the influence of strain, as they can sustain very large deformations without breaking. Various optical techniques have been employed to probe strain in two-dimensional materials, including micro-Raman and photoluminescence spectroscopy. Here we demonstrate that optical second harmonic generation constitutes an even more powerful technique, as it allows extraction of the full strain tensor with a spatial resolution below the optical diffraction limit...
February 6, 2018: Nature Communications
https://www.readbyqxmd.com/read/29368610/the-revamp-natural-experiment-study-the-impact-of-a-play-scape-installation-on-park-visitation-and-park-based-physical-activity
#6
Jenny Veitch, Jo Salmon, David Crawford, Gavin Abbott, Billie Giles-Corti, Alison Carver, Anna Timperio
BACKGROUND: Designing parks that optimise visitation and support visitors to be active is important for public health. Yet there is very little evidence about whether playground refurbishment achieves these objectives. This study examined the impact of the installation of a play-scape in a large metropolitan park in Melbourne, Australia. METHODS: Natural experiment study (intervention vs control). At both parks, park visitation and physical activity were assessed before (T1, 2013) and after the intervention at 12 (T2, 2014) and 24 months (T3, 2015)...
January 25, 2018: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/29347233/dynamics-and-energy-spectra-of-aperiodic-discrete-time-quantum-walks
#7
N Lo Gullo, C V Ambarish, Th Busch, L Dell'Anna, C M Chandrashekar
We investigate the role of different aperiodic sequences in the dynamics of single quantum particles in discrete space and time. For this we consider three aperiodic sequences, namely, the Fibonacci, Thue-Morse, and Rudin-Shapiro sequences, as examples of tilings the diffraction spectra of which have pure point, singular continuous, and absolutely continuous support, respectively. Our interest is to understand how the order, intrinsically introduced by the deterministic rule used to generate the aperiodic sequences, is reflected in the dynamical properties of the quantum system...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29295574/nematic-liquid-crystal-colloids
#8
REVIEW
Igor Muševič
This article provides a concise review of a new state of colloidal matter called nematic liquid-crystal colloids. These colloids are obtained by dispersing microparticles of different shapes in a nematic liquid crystal that acts as a solvent for the dispersed particles. The microparticles induce a local deformation of the liquid crystal, which then generates topological defects and long-range forces between the neighboring particles. The colloidal forces in nematic colloids are much stronger than the forces in ordinary colloids in isotropic solvents, exceeding thousands of kBT per micrometer-sized particle...
December 25, 2017: Materials
https://www.readbyqxmd.com/read/29238615/profile-of-geohelminth-eggs-cysts-and-oocysts-of-protozoans-contaminating-the-soils-of-ten-primary-schools-in-dschang-west-cameroon
#9
Vanessa Rosine Nkouayep, Blandine Ngatou Tchakounté, Josué Wabo Poné
Helminthiasis and protozoans infections have been recognized as an important public health problem. The aim of the present study was to screen soil samples collected from 10 primary schools in the city of Dschang for the presence of soil-transmitted helminth eggs, cysts, and oocysts of protozoans. A total of 400 soil samples were collected around latrines, at playgrounds, and behind classrooms in each school. These samples were examined using the sucrose flotation method. From the result obtained, an overall contamination rate of 7...
2017: Journal of Parasitology Research
https://www.readbyqxmd.com/read/29212055/indoor-and-outdoor-air-concentrations-of-volatile-organic-compounds-and-no2-in-schools-of-urban-industrial-and-rural-areas-in-central-southern-spain
#10
Florentina Villanueva, Araceli Tapia, Sonia Lara, Mariano Amo-Salas
Thirty two VOCs including alkanes, aromatic hydrocarbons, terpenes and carbonyl compounds together with NO2 were investigated in a kindergarten classroom, a primary classroom and the playground in 18 schools located in rural areas, an urban area (Ciudad Real) and an industrial area (Puertollano) in the province of Ciudad Real in central southern Spain. The most abundant pollutants at schools were the aldehydes formaldehyde and hexanal. After carbonyls, n-dodecane was the most abundant compound in the study areas...
December 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29199530/unspoken-playground-rules-discourage-adolescent-physical-activity-in-school-a-focus-group-study-of-constructs-in-the-prototype-willingness-model
#11
Catherine M Wheatley, Emma L Davies, Helen Dawes
The health benefits of exercise in school are recognized, yet physical activity continues to decline during early adolescence despite numerous interventions. In this study, we investigated whether the prototype willingness model, an account of adolescent decision making that includes both reasoned behavioral choices and unplanned responses to social environments, might improve understanding of physical activity in school. We conducted focus groups with British pupils aged 12 to 13 years and used deductive thematic analysis to search for themes relating to the model...
December 1, 2017: Qualitative Health Research
https://www.readbyqxmd.com/read/29184164/correlates-of-compliance-with-recommended-levels-of-physical-activity-in-children
#12
Thayse Natacha Gomes, Peter T Katzmarzyk, Donald Hedeker, Mikael Fogelholm, Martyn Standage, Vincent Onywera, Estelle V Lambert, Mark S Tremblay, Jean-Philippe Chaput, Catrine Tudor-Locke, Olga Sarmiento, Victor Matsudo, Anura Kurpad, Rebecca Kuriyan, Pei Zhao, Gang Hu, Timothy Olds, Carol Maher, José Maia
The purpose of this study was to describe children's daily compliance with moderate-to-vigorous physical activity (MVPA) recommendations across a week in different parts of the world, and to identify individual- and school-level correlates that may explain differences in daily MVPA compliance. The sample included 6553 children aged 9-11 years from 12 countries, and multilevel statistical analyses were used, including both child- and school-level variables. Most children did not comply with the MVPA guidelines on a daily basis: Chinese children complied the least, whereas Finnish, Australian, Colombian, UK, and Kenyan children complied the most...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29182325/switching-on-a-spin-glass-flux-growth-structure-and-magnetism-of-la11mn13-x-ynixalysn4-%C3%AE-intermetallics
#13
Julia V Zaikina, Van S Griffin, Susan E Latturner
Reactions of tin and manganese in a lanthanum/nickel eutectic melt in alumina crucibles produce La11Mn13-x-yNixAlySn4-δ (0 ≤ x ≤ 3.6; 2.5 ≤ y ≤ 4.9; 0.6 ≤ δ ≤ 1.1) phases with the stoichiometry dependent on the reactant ratio. These compounds crystallize in a new tetragonal structure type in space group P4/mbm, with a = 8.4197(1) Å, c = 19.2414(3) Å, and Z = 2 for La11Mn8.2Ni0.8Al4Sn3.3. The structure can be viewed as an intergrowth between La6Co11Ga3-type layers and Cr5B3-type La/Sn slabs. This system represents a unique playground to study the itinerant magnetism of diluted icosahedral Mn layers...
November 28, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29177128/playground-usage-and-physical-activity-levels-of-children-based-on-playground-spatial-features
#14
Anne K Reimers, Guido Knapp
Aim: Being outdoors is one of the strongest correlates of physical activity in children. Playgrounds are spaces especially designed to enable and foster physical activity in children. This study aimed to analyze the relationship between the spatial features of public playgrounds and the usage and physical activity levels of children playing in them. Subjects and methods: A quantitative, observational study was conducted of ten playgrounds in one district of a middle-sized town in Germany...
2017: Journal of Public Health
https://www.readbyqxmd.com/read/29145884/systematic-literature-review-of-built-environment-effects-on-physical-activity-and-active-transport-an-update-and-new-findings-on-health-equity
#15
REVIEW
Melody Smith, Jamie Hosking, Alistair Woodward, Karen Witten, Alexandra MacMillan, Adrian Field, Peter Baas, Hamish Mackie
BACKGROUND: Evidence is mounting to suggest a causal relationship between the built environment and people's physical activity behaviours, particularly active transport. The evidence base has been hindered to date by restricted consideration of cost and economic factors associated with built environment interventions, investigation of socioeconomic or ethnic differences in intervention effects, and an inability to isolate the effect of the built environment from other intervention types...
November 16, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/29119828/a-pilot-study-of-children-s-physical-activity-levels-during-imagination-based-mobile-games
#16
James W Patten, Grace Iarocci, Nis Bojin
This research looked at Biba: a suite of mobile games intended to get kids back out to playgrounds and engaging in more moderate to vigorous physical activity (MVPA). Year after year, annual national surveys report a general decline in physical activity amongst children and a corresponding increase in screen time. Further to this, time spent outside by children has been reported to be on the decline since the 1980s. Recent work has suggested that in order to 'maintain the outdoor recreation participation of children across America, park and recreation professionals may need to embrace the expanding role of technology'...
September 2017: Journal of Child Health Care: for Professionals Working with Children in the Hospital and Community
https://www.readbyqxmd.com/read/29119813/school-age-children-s-perception-of-the-hospital-experience
#17
Handan Boztepe, Sevil Çınar, Ayşe Ay
In order to determine the perception of hospital experiences among school-age children's (6-12 years), a descriptive and cross-sectional study was performed in 130 children hospitalized in a pediatric hospital with different diagnoses. Data were collected using a pediatric information form, questionnaire form, scale for attitudes towards hospital and healthcare personnel, and sources of anxiety generating thoughts scale (SAGTS). Children's expectations of the nurses were to be well treated (62%), to perform painless procedures (20%), to play games together (12%), to be capable of their job (10%), and to be cheerful (10%)...
June 2017: Journal of Child Health Care: for Professionals Working with Children in the Hospital and Community
https://www.readbyqxmd.com/read/29114499/a-review-of-factors-limiting-physical-activity-among-young-children-from-low-income-families
#18
REVIEW
Seung Ho Chang, Kijeong Kim
Children need to participate in structured physical activities to avoid obesity and to engage in sports and games in the future. However, certain groups of our population have little access to enhance levels of physical activity. One such group is children from low-income families who are more likely to have less opportunity for participation in physical activity because of factors such as unsafe streets or limited access to playgrounds. According to the United States Department of Health and Human Services, there is a strong relationship between family income and physical activity with low-income families being the most sedentary...
August 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29111647/insulator-to-metal-transition-at-oxide-interfaces-induced-by-wo3-overlayers
#19
Giordano Mattoni, David J Baek, Nicola Manca, Nils Verhagen, Dirk J Groenendijk, Lena F Kourkoutis, Alessio Filippetti, Andrea D Caviglia
Interfaces between complex oxides constitute a unique playground for two-dimensional electron systems (2DESs), where superconductivity and magnetism can arise from combinations of bulk insulators. The 2DES at the LaAlO3/SrTiO3 interface is one of the most studied in this regard, and its origin is determined by the polar field in LaAlO3 as well as by the presence of point defects, like oxygen vacancies and intermixed cations. These defects usually reside in the conduction channel and are responsible for a decrease of the electronic mobility...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29111619/incidence-and-cost-of-hospitalisation-of-children-with-injuries-from-playground-equipment-falls-in-new-south-wales-australia
#20
Mia Bierbaum, Kate Curtis, Rebecca Mitchell
AIMS: To describe the epidemiological profile and cost of hospitalised injuries caused by playground equipment falls of children aged 0-14 years, in New South Wales, Australia. METHODS: Linked New South Wales hospitalisation data from 1 January 2010 to 30 June 2014 were used to describe the incidence of hospitalisation for playground falls, the age-standardised rate of hospitalisation per year, age group and gender, the characteristics of the injured children and the injury incident...
November 7, 2017: Journal of Paediatrics and Child Health
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