bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of Static and Dynamic Balance in Male Football and Basketball Players
Authors: Halabchi Farzin , Abbasian Ladan , Mirshahi Maryam , Mazaheri Reza , Pourgharib Shahi Mohammad Hosein , Mansournia Mohammad Ali 
Published: May 2019

Introduction. The aim of the present study was to compare static and dynamic balance among professional athletes in football and basketball. Methods. In this cross-sectional study, 47 professional, male football and basketball players from Pro League in Iran participated. They were divided into 3 groups. Group 1 included 16 participants with history of grade 1 or 2 single ankle sprain within the past 6 months. Group 2 included 17 participants with recurrent ankle sprain. Group 3 included 14 participants without history of ankle sprain. Static and dynamic balance were measured by the Balance Error Scoring System (BESS) and modified Star Excursion Balance Test (SEBT), respectively. Results. For the single-leg stance on a firm surface, group 2 scored errors with a high mean value of 3.94 compared with the other 2 groups, and the difference was statistically significant (P = .03). Significant differences in BESS scores are observed on both surfaces across the tandem limb between groups 2 and 3. Conclusion. The measures from the SEBTs may not reflect the balance performance especially in well-trained athletes who have a better balance when performing sport-related skills. However, BESS includes static postures, and it may reflect postural deficits better than dynamic tests in the more experienced athlete. Level of Evidence: Diagnostic, Level IV
Prevalence of vitamin B12 deficiency among metformin-treated type 2 diabetic patients in a tertiary institution, South-South Nigeria
Authors: Owhin Sampson Omagbemi , Adaja Tomisin Mathew , Fasipe Olumuyiwa John , Akhideno Peter Ehizokhale , Kalejaiye Olufunto Olufela , Kehinde Michael Olufemi 
Published: May 2019

Background: The risk of chronic metformin pharmacotherapy to cause vitamin B12 deficiency and its associated medical complications has been of immense concern among diabetic patients. Some studies have postulated that vitamin B12 deficiency is highly prevalent among chronic metformin-treated adult diabetic patients. Aim: This study aimed to determine the prevalence of vitamin B12 deficiency among metformin-treated and metformin-naïve type 2 diabetes mellitus patients. Materials and methods: This was a case-control, prospective, analytical, observational study of 200 adult participants (100 per group) attending the Endocrinology, Medical Out-patients Clinic of Irrua Specialist Teaching Hospital, Irrua, Edo State, Nigeria. The participants’ serum vitamin B12 levels were determined using an immunoassay technique. Data were presented using tables and charts. Chi-square test was used to compare non-continuous proportional variables. Results: The prevalence of vitamin B12 deficiency was 41% and 20% among metformin-treated and metformin-naïve type 2 diabetes mellitus groups, respectively (p = 0.001). Borderline vitamin B12 status was present among 59% of metformin-treated group and 80% of metformin-naïve group (p = 0.001). Neither metformin-treated nor metformin-naïve groups had normal serum vitamin B12 levels. Conclusion: The prevalence of vitamin B12 deficiency was significantly high in diabetics, especially the metformin-treated patients. We advocate for vitamin B12 supplementation among this group of patients in order to prevent the occurrence of vitamin B12 deficiency complications such as macro-ovalocytic anemia, impaired immunity with hypersegmented neutrophils, peripheral neuropathy and subacute degeneration of the spinal cord.
Surface modification of halloysite nanotubes grafted by dodecylamine and their application in reinforcing polytetrafluoroethylene
Authors: Cheng Zhi-Lin , Chang Xing-Yu , Liu Zan 
Published: May 2019

AbstractThe modification of halloysite nanotubes (HNTs) as fillers is very effective at improving the performance of polymers. A novel modification of HNTs through grafting dodecylamine onto their surfaces was conducted here. Owing to the improvement in dispersibility of HNTs in polytetrafluoroethylene (PTFE), the mechanical properties and wear resistance (in particular) of the dodecylamine-modified HNT-filled PTFE composite were enhanced significantly.
Efficacy and safety of artemether–lumefantrine as treatment for Plasmodium falciparum uncomplicated malaria in adult patients on efavirenz-based antiretroviral therapy in Zambia: an open label non-randomized interventional trial
Authors: Banda Clifford G. , Chaponda Mike , Mukaka Mavuto , Mulenga Modest , Hachizovu Sebastian , Kabuya Jean B. , Mulenga Joyce , Sikalima Jay , Kalilani-Phiri Linda , Terlouw Dianne J. , Khoo Saye H. , Lalloo David G. , Mwapasa Victor 
Published: May 2019

Abstract
Background
HIV-infected individuals on antiretroviral therapy (ART) require treatment with artemisinin-based combination therapy (ACT) when infected with malaria. Artemether–lumefantrine (AL) is the most commonly used ACT for treatment of falciparum malaria in Africa but there is limited evidence on the safety and efficacy of AL in HIV-infected individuals on ART, among whom drug–drug interactions are expected. Day-42 adequate clinical and parasitological response (ACPR) and incidence of adverse events was assessed in HIV-infected individuals on efavirenz-based ART with uncomplicated falciparum malaria treated with AL.

Methods
A prospective, open label, non-randomized, interventional clinical trial was conducted at St Paul’s Hospital in northern Zambia, involving 152 patients aged 15–65 years with uncomplicated falciparum malaria, who were on efavirenz-based ART. They received a 3-day directly observed standard treatment of AL and were followed up until day 63. Day-42 polymerase chain reaction (PCR)-corrected ACPRs (95% confidence interval [CI]) were calculated for the intention-to-treat population.

Results
Enrolled patients had a baseline geometric mean (95% CI) parasite density of 1108 (841–1463) parasites/µL; 16.4% (25/152) of the participants had a recurrent malaria episode by day 42. However, PCR data was available for 17 out of the 25 patients who had malaria recurrence. Among all the 17 patients, PCR findings demonstrated malaria re-infection, making the PCR-adjusted day-42 ACPR 100% in the 144 patients who could be evaluated. Even when eight patients with missing PCR data were considered very conservatively as failures, the day-42 ACPR was over 94%. None of the participants, disease or treatment characteristics, including day-7 lumefantrine concentrations, predicted the risk of malaria recurrence by day 42. AL was well tolerated following administration. There were only two cases of grade 3 neutropaenia and one serious adverse event of lobar pneumonia, none of which was judged as probably related to intake of AL.

Conclusions
AL was well tolerated and efficacious in treating uncomplicated falciparum malaria in HIV co-infected adults on efavirenz-based ART. However, a higher than anticipated proportion of participants experienced malaria re-infection, which highlights the need for additional malaria prevention measures in this sub-population after treatment with AL.
Trial registration Pan African Clinical Trials Registry (PACTR): PACTR201311000659400. Registered on 4 October 2013. https://pactr.samrc.ac.za/Search.aspx
Changes in FTO and IRX3 gene expression in obese and overweight male adolescents undergoing an intensive lifestyle intervention and the role of FTO genotype in this interaction
Authors: Doaei Saeid , Kalantari Naser , Izadi Pantea , Salonurmi Tuire , Mosavi Jarrahi Alireza , Rafieifar Shahram , Azizi Tabesh Ghasem , Rahimzadeh Ghazaleh , Gholamalizadeh Maryam , Goodarzi Mark O. 
Published: May 2019

AbstractBackgroundLifestyle intervention may have a critical effect on the association between genetics and obesity. This study aimed to investigate changes inFTOandIRX3gene expression in obese and overweight male adolescents undergoing a lifestyle intervention and the role ofFTOgenotype in this interaction.MethodsThis study was a field trial of 62 adolescents from boys’ high schools in Tehran, Iran. Two schools were randomly allocated as the intervention (n = 30) and control (n = 32) schools. The rs9930506 SNP inFTOwas genotyped at baseline and the level ofFTOandIRX3expression in peripheral blood mononuclear cells (PBMCs). Anthropometric measurements were assessed at baseline and after 18 weeks of intensive lifestyle intervention.ResultsOur results showed thatIRX3expression in the intervention group was significantly up-regulated compared to baseline (P = 0.007) and compared to the control group (P = 0.011).The intervention group had significantly up-regulated transcripts ofIRX3only in rs9930506 risk allele carriers of the intervention group compared to risk allele carriers of the control group (P = 0.017). Moreover, our data showed that the FTO expression was up-regulated in AA genotype carriers and down-regulated in AG/GG genotype carriers (P = 0.017).ConclusionLifestyle modification may exert its effects on obesity through changes in the expression level of theFTOandIRX3genes. However,FTOgenotype plays a role in the extent of the effect of lifestyle changes on gene expression. Further studies are crucial to have a better understanding of the interaction between lifestyle, genetics and anthropometric measurements.Trial registrationThis paper reports a comprehensive intervention study (Interactions of Genetics, Lifestyle and Anthropometrics study or IGLA study), which is retrospectively registered in the Iranian Registry of Clinical Trials as IRCT2016020925699N2. Date registered: April 24, 2016. (https://www.irct.ir/searchresult.php?id=25699&number=2)
Learning from Riyadh
Authors: Menoret Pascal 
Published: May 2019

AbstractWhat can we learn from Riyadh? What does this massive desert capital teach us about cities that other, better-studied places don't? This article examines the making of one of the most salient characteristics of Riyadh: its carscape. In 2000, 93 percent of all daily trips in Riyadh were done by private car, 5 percent were done by taxi, and 2 percent were done by collective transit, which means that private or hired cars were used in 98 percent of all 5 million daily trips in the city. The city looks today like a geometric, far-flung suburb crisscrossed by large highways and spotted with bouquets of high rises. Instead of developing around one central core in a contiguous manner, Riyadh grew around the massive usage of cars. Why and how did the suburbanization of Riyadh happen? How did Saudi automobility become the overwhelming social and political structure it is now?
Protocol for a Japanese nationwide repeated cross-sectional study to assess tobacco and nicotine product use behaviour after market introduction of tobacco heating products (THPs)
Authors: Adamson Jason , Kanitscheider Claudia , Prasad Krishna , Camacho Oscar M. , Beyerlein Elisabeth , Keralapura Yoga , Proctor Christopher , Murphy James 
Published: May 2019

Background - In recent years there has been a proliferation of alternative tobacco and nicotine products that reduce consumers’ exposure to harmful substances and therefore have the potential to reduce risk to health. Post-market surveillance enables the evaluation of newly introduced tobacco and nicotine products (aka potentially reduced risk products (PRRPs)) at a population level. This study aims to investigate tobacco and nicotine consumer demographics and discover how people are using these products, and characterise behavioral trends as transitions between tobacco heated products (THPs) and other nicotine products. These behavioural aspects, in conjunction with the intrinsic risk of the product, are essential for assessing the potential health effects and establishing a population risk assessment. Design and methods - This epidemiological cross-sectional study will collect data using a self-administered study instrument from the general Japanese population aged 20 years and older. The targeted sampling size is up to 5,000 participants per study wave. The study addresses the following objectives: estimation of tobacco and nicotine use prevalence; characterisation of product usage by product type; changes in use behaviour in general, with particular emphasis on the introduction of THPs in the time period of one year; risk perceptions of different tobacco products and no tobacco usage; and participant perceived health status and quality of life. Discussion - The description of tobacco and nicotine product use behaviour, the estimation of prevalence data, the measuring of product-specific risk perception and the change of tobacco use behaviour within one year will allow for a comprehensive assessment of the effect of introducing THPs into a market. These data could also be used to inform a system dynamics population model in order to estimate the public health impact of introducing a THP into the Japanese market.
Bilateral Liability-Based Contracts in Information Security Outsourcing
Authors: Hui Kai-Lung , Ke Ping Fan , Yao Yuxi , Yue Wei T. 
Published: May 2019

We study the efficiency of bilateral liability-based contracts in managed security services (MSSs). We model MSS as a collaborative service with the protection quality shaped by the contribution of both the service provider and the client. We adopt the negligence concept from the legal profession to design two novel contracts: threshold-based liability contract and variable liability contract. We find that they can achieve the first best outcome when postbreach effort verification is feasible. More importantly, they are more efficient than a multilateral contract when the MSS provider assumes limited liability. Our results show that bilateral liability-based contracts can work in the real world. Hence, more research is needed to explore their properties. We discuss the related implications. The online appendix is available at https://doi.org/10.1287/isre.2018.0806 .
Diagnóstico tecnológico de la pertinencia al implementar un laboratorio de testing de software. Caso: Universidad Cooperativa de Colombia, campus Popayán
Authors: Mera Paz Julián Andrés 
Published: May 2019

Contexto: Actualmente la Universidad Cooperativa de Colombia, campus Popayán, no cuenta con un espacio o laboratorio de testing de software, sin embargo, el testing es un elemento fundamental del control de calidad enfocado tanto en el producto como en el proceso. Se plantea un diagnostico tecnológico con el objeto de validar la pertinencia de su implementación.
Método: En el artículo se realiza una revisión de las definiciones teóricas, las técnicas, los métodos, las herramientas y las características que se sugiere se deben tener en cuenta para la implementación de un laboratorio de testing a partir del marco de referencia CMMI y TMMI (referentes de la bibliografía científica). Con el método se enfatiza también la importancia del rol de las instituciones de educación superior y la enseñanza del testing de software.
Resultados: El diagnostico tecnológico es una herramienta que, de forma ágil y eficiente, permite obtener claridad en las necesidades y oportunidades para proponer soluciones reales, como elemento fundamental en la pertinencia y viabilidad de implementar un espacio para las prácticas y experimentación referente al testing y la calidad de software, en la Universidad Cooperativa de Colombia, campus Popayán.
Conclusiones: El diagnostico tecnológico abre las puertas a profundizar en el contexto del control de calidad y su pertinencia desde los entornos académicos y contribuye a la cohesión entre la industria software y el modelo enseñanza/aprendizaje del software.
Identificación de malas prácticas constructivas en la vivienda informal. Propuesta educativa
Authors: Torres Parra Camilo Alberto , Arias Hernandez Janneth 
Published: May 2019

Contexto: Este trabajo presenta una propuesta educativa y participativa, liderada por la Red de Cooperación Construya Seguro y Sostenible, a la cual pertenece la Corporación Universitaria Minuto de Dios, la Universidad Católica de Colombia y la Universidad Piloto de Colombia desde sus programas de Ingeniería Civil.
Metodología: Esta investigación se desarrolló a partir de un método cuantitativo descriptivo no experimental, en donde se identificaron cuarenta y cuatro (44) malas prácticas ligadas a la habitabilidad en la vivienda informal.
Resultados: Estas malas prácticas se tradujeron en objetivos instruccionales mediante unidades de aprendizaje enmarcadas en una propuesta de curso orientado a comunidades bajo el modelo instruccional de Jerrold y Kemp.
Conclusión: Esta iniciativa permitió vincular a 25 familias del barrio Villas de Kennedy, en Bogotá (Colombia), con estudiantes y docentes vinculados a la Red, quienes mediante un trabajo participativo socializaron sus hallazgos y experiencias.
A topological duality for strong Boolean posets
Authors: Yuan Zhenzhu , Li Qingguo 
Published: May 2019

Abstract
In this paper, we define a new class of posets which are complemented and ideal-distributive, we call these posets strong Boolean. This definition is a generalization of Boolean lattices on posets, and is different from Boolean posets. We give a topology on the set of all prime Frink ideals in order to obtain the Stone’s topological representation for strong Boolean posets. A discussion of a duality between the categories of strong Boolean posets and BP-spaces is also presented.
On the Diophantine equationsx2+ 2α3β19γ=ynandx2+ 2α3β13γ=yn
Authors: Ghadermarzi Amir 
Published: May 2019

AbstractIn this note we find all the solutions to the equationx2+ 2α3β19γ=ynin nonnegative unknowns withn≥ 3 and gcd(x,y) = 1, and nonnegative solutions tox2+ 2α3β13γ=ynwithn≥ 3, gcd(x,y) = 1, except whenα= 0 andx.β.γis odd.
A conjecture for varieties of completely regular semigroups
Authors: Petrich Mario 
Published: May 2019

Abstract
The class 𝒞ℛ of completely regular semigroups considered with the unary operation of inversion within maximal subgroups forms a variety. The B-relation on the lattice ℒ(𝒞ℛ) of subvarieties of 𝒞ℛ identifies two varieties if they contain the same bands. Its classes are intervals with the set Δ of upper ends of these intervals. Canonical varieties form part of Δ. Previously we determined the sublattice Ψ of ℒ(𝒞ℛ) generated by the variety 𝒞𝒮 of completely simple semigroups and six canonical varieties.
The conjecture is that the sublattice of ℒ(𝒞ℛ) generated by 𝒞𝒮 and canonical varieties follows the pattern of the structure of Ψ.
Some new results on real hypersurfaces with generalized Tanaka-Webster connection
Authors: Wang Wenjie , Liu Ximin 
Published: May 2019

AbstractLetMbe a real hypersurface in nonflat complex space forms of complex dimension two. In this paper, we prove that the shape operator ofMis transversally Killing with respect to the generalized Tanaka-Webster connection if and only ifMis locally congruent to a type (A) or (B) real hypersurface. We also prove that shape operator ofMcommutes with Cho operator on holomorphic distribution if and only ifMis locally congruent to a ruled real hypersurface.
The Menger and projective Menger properties of function spaces with the set-open topology
Authors: Osipov Alexander V. 
Published: May 2019

Abstract
For a Tychonoff space X and a family λ of subsets of X, we denote by C
λ(X) the space of all real-valued continuous functions on X with the set-open topology.
A Menger space is a topological space in which for every sequence of open covers 𝓤1, 𝓤2, … of the space there are finite sets 𝓕1 ⊂ 𝓤1, 𝓕2 ⊂ 𝓤2, … such that family 𝓕1 ∪ 𝓕2 ∪ … covers the space.
In this paper, we study the Menger and projective Menger properties of a Hausdorff space C
λ(X). Our main results state that

C
λ(X) is Menger if and only if C
λ(X) is σ-compact;

Cp
(Y | X) is projective Menger if and only if Cp
(Y | X) is σ-pseudocompact where Y is a dense subset of X.
Identifying surface morphological characteristics to differentiate between mixtures of U3O8 synthesized from ammonium diuranate and uranyl peroxide
Authors: Heffernan Sean T. , Ly Nhat-Cuong , Mower Brock J. , Vachet Clement , Schwerdt Ian J. , Tasdizen Tolga , McDonald IV Luther W. 
Published: May 2019

Abstract
In the present study, surface morphological differences of mixtures of triuranium octoxide (U3O8), synthesized from uranyl peroxide (UO4) and ammonium diuranate (ADU), were investigated. The purity of each sample was verified using powder X-ray diffractometry (p-XRD), and scanning electron microscopy (SEM) images were collected to identify unique morphological features. The U3O8 from ADU and UO4 was found to be unique. Qualitatively, both particles have similar features being primarily circular in shape. Using the morphological analysis of materials (MAMA) software, particle shape and size were quantified. UO4 was found to produce U3O8 particles three times the area of those produced from ADU. With the starting morphologies quantified, U3O8 samples from ADU and UO4 were physically mixed in known quantities. SEM images were collected of the mixed samples, and the MAMA software was used to quantify particle attributes. As U3O8 particles from ADU were unique from UO4, the composition of the mixtures could be quantified using SEM imaging coupled with particle analysis. This provides a novel means of quantifying processing histories of mixtures of uranium oxides. Machine learning was also used to help further quantify characteristics in the image database through direct classification and particle segmentation using deep learning techniques based on Convolutional Neural Networks (CNN). It demonstrates that these techniques can distinguish the mixtures with high accuracy as well as showing significant differences in morphology between the mixtures. Results from this study demonstrate the power of quantitative morphological analysis for determining the processing history of nuclear materials.
Fine-Scale Inference of Ancestry Segments Without Prior Knowledge of Admixing Groups
Authors: Salter-Townshend Michael , Myers Simon 
Published: May 2019

AbstractSalter-Townshend and Myers present an open source tool for modelling multi-way admixture events using dense haplotype data. Their Hidden Markov Model approach is scalable to thousands of samples and, unlike existing methods...We present an algorithm for inferring ancestry segments and characterizing admixture events, which involve an arbitrary number of genetically differentiated groups coming together. This allows inference of the demographic history of the species, properties of admixing groups, identification of signatures of natural selection, and may aid disease gene mapping. The algorithm employs nested hidden Markov models to obtain local ancestry estimation along the genome for each admixed individual. In a range of simulations, the accuracy of these estimates equals or exceeds leading existing methods. Moreover, and unlike these approaches, we do not require any prior knowledge of the relationship between subgroups of donor reference haplotypes and the unseen mixing ancestral populations. Our approach infers these in terms of conditional “copying probabilities.” In application to the Human Genome Diversity Project, we corroborate many previously inferred admixture events (e.g., an ancient admixture event in the Kalash). We further identify novel events such as complex four-way admixture in San-Khomani individuals, and show that Eastern European populations possess 1−3% ancestry from a group resembling modern-day central Asians. We also identify evidence of recent natural selection favoring sub-Saharan ancestry at the human leukocyte antigen (HLA) region, across North African individuals. We make available an R and C++ software library, which we term MOSAIC (which stands for MOSAIC Organizes Segments of Ancestry In Chromosomes).