bluuebunny/crossref_metadata_2025_split huggingface dataset:
Functional sol-gel coated electrospun polyamide 6,6/ZnO composite nanofibers
Authors: Celik Bedeloglu Ayse , Islek Cin Zeynep 
Published: August 2019

Abstract
Polymer-based nanofibers are good candidates for medical textiles due to their excellent properties including high surface area, breathability and flexibility. Doping polymer nanofibers with different nanoparticles enhances their existing properties. In this study, electrospun polyamide 6,6 (PA6,6) composite nanofibers containing ZnO nanoparticles (<50 nm) in different amounts (1%, 3% and 5%) were first produced by electrospinning technique; then, these nanofibers were coated with sol-gel ZnO solution (0.5 m) via dip coating method at 1000, 3000 and 5000 μm/s speeds. The sol-gel coating process increased the breaking strength of nanofiber mats, while the incorporation of ZnO nanoparticles into the polymer nanofibers reduced. Compared to pure PA6,6 nanofiber mats, the ZnO sol-gel coated samples and doped nanofibers had lower reflectance values. In addition, the reflection values decreased as the additive and coating speed increased.
Comparison of ReO4
− and TcO4
− in solvent extraction systems
Authors: Eiroa-Lledo Cecilia , Lecrivain Lindsey , Parker T. Gannon , Wall Donald E. , Wall Nathalie A. 
Published: August 2019

Abstract
The suitability of perrhenate (Re(VII)) to act as an analog for pertechnetate (Tc(VII)) was tested using solvent extraction and the carrier/tracer systems 99Tc(VII)/99mTc(VII) and 185/187Re/186/188Re(VII). Perrhenate is often used as a non-radioactive analogue of pertechnetate, but scarce data is available for the comparison of these metals for liquid-liquid extraction applications. Results show that neither Tc(VII) nor Re(VII) extraction is influenced by pH in the 2–8 range. The anion extractant also separates electrolyte anions, with increasing extraction following the order Cl− < NO3
− ≪ ClO4
−, resulting in a decreased Tc(VII) and Re(VII) extraction in presence of salt. In particular, the extraction of Re and Tc is suppressed in presence of NaCl at concentrations higher than 1 mM. While Tc extraction is larger than that of Re in absence of electrolyte, they are statistically identical in presence of enough electrolyte. Furthermore, tetraphenylphosphonium chloride (Ph4PCl) is a stronger extractant than iodonitrotetrazolium chloride (INT).
Protactinium(V) in aqueous solution: a light actinide without actinyl moiety
Authors: Le Naour Claire , Roques Jérôme , Den Auwer Christophe , Moisy Philippe , Aupiais Jean 
Published: August 2019

AbstractThis review highlights recent data on the complexation of Pa(V) with inorganic (fluoride and sulphate) and organic (oxalate, nitrilotriacetate, diethylenetriaminepentaacetate) ligands in solution. New thermodynamic parameters relative to the complexation of Pa(V) with sulphate are presented. The review also includes gas phase and theoretical studies focused on the interaction of Pa(V) in the dioxo and oxo forms with water.
Hyers–Ulam stability for coupled random fixed point theorems and applications to periodic boundary value random problems
Authors: Boudaoui A. , Caraballo T. , Blouhi T. 
Published: August 2019

Abstract
In this paper, we prove some existence, uniqueness and Hyers–Ulam stability results for the coupled random fixed point of a pair of contractive type random operators on separable complete metric spaces.
The approach is based on a new version of the Perov type fixed point theorem for contractions.
Some applications to integral equations and to boundary value problems are also given.
Clustering methods for single-cell RNA-sequencing expression data: performance evaluation with varying sample sizes and cell compositions
Authors: Suner Aslı 
Published: August 2019

AbstractA number of specialized clustering methods have been developed so far for the accurate analysis of single-cell RNA-sequencing (scRNA-seq) expression data, and several reports have been published documenting the performance measures of these clustering methods under different conditions. However, to date, there are no available studies regarding the systematic evaluation of the performance measures of the clustering methods taking into consideration the sample size and cell composition of a given scRNA-seq dataset. Herein, a comprehensive performance evaluation study of 11 selected scRNA-seq clustering methods was performed using synthetic datasets with known sample sizes and number of subpopulations, as well as varying levels of transcriptome complexity. The results indicate that the overall performance of the clustering methods under study are highly dependent on the sample size and complexity of the scRNA-seq dataset. In most of the cases, better clustering performances were obtained as the number of cells in a given expression dataset was increased. The findings of this study also highlight the importance of sample size for the successful detection of rare cell subpopulations with an appropriate clustering tool.
Multivariate risk measures in the non-convex setting
Authors: Haier Andreas , Molchanov Ilya 
Published: August 2019

Abstract
The family of admissible positions in a transaction costs model is a
random closed set, which is convex in case of proportional transaction costs.
However, the convexity fails, e.g., in case of fixed transaction costs or when only a finite number of transfers are possible.
The paper presents an approach to measure risks of such positions based on the idea of considering all selections of the portfolio and checking if one of them is acceptable.
Properties and basic examples of risk measures of non-convex portfolios are presented.
Vollständige Parametrisierung für die 3D Evolventenverzahnung
Authors: Härtig Frank , Stein Martin , Kniel Karin 
Published: August 2019

Zusammenfassung
Beschrieben wird eine vollständige Definition für zylindrische Evolventenverzahnungen als dreidimensionales Formelement. Grundlage ist ein evolventisches Koordinatensystem. Mit ihm lassen sich innen und außen verzahnte Räder mit linkssteigender und rechtssteigender Flankenrichtung sowie Geradverzahnungen darstellen. Besondere Bedeutung gewinnt diese Darstellung im Bereich der Verzahnungs- und Koordinatenmesstechnik. Gewöhnlich liegen die Messpunkte als kartesische Koordinaten in Form von Tastkugelmittelpunkten des Antastelements vor. Diese können außerhalb ihrer Bezugsflächen nahezu beliebig über die Flanke verteilt sein. Der Einsatz von Evolventenkoordinaten ist Grundlage für eine einfache Auswertung der Verzahnungsparameter. Die dargestellten Definitionen und Algorithmen ergänzen bestehende Richtlinien und Normen, in denen die Zusammenhänge bisher nicht beschrieben sind.
Differential Regulation of Innate and Learned Behavior byCreb1/Crh-1inCaenorhabditis elegans
Authors: Dahiya Yogesh , Rose Saloni , Thapliyal Shruti , Bhardwaj Shivam , Prasad Maruthi , Babu Kavita 
Published: August 2019

Memory formation is crucial for the survival of animals. Here, we study the effect of differentcrh-1[Caenorhabditis eleganshomolog of mammalian cAMP response element binding protein 1 (CREB1)] isoforms on the ability ofC. elegansto form long-term memory (LTM). Null mutants increb1/crh-1are defective in LTM formation across phyla. We show that a specific isoform of CREB1/CRH-1, CRH-1e, is primarily responsible for memory related functions of the transcription factor inC. elegans. Silencing of CRH-1e-expressing neurons during training for LTM formation abolishes the LTM of the animal. Further, CRH-1e expression in RIM neurons is sufficient to rescue LTM defects ofcreb1/crh-1-nullmutants. We go on to show that apart from being LTM defective,creb1/crh-1-nullanimals show defects in innate chemotaxis behavior. We further characterize the amino acids K247 and K266 as responsible for the LTM related functions of CREB1/CRH-1 while being dispensable for its innate chemotaxis behavior. These findings provide insight into the spatial and temporal workings of a crucial transcription factor that can be further exploited to find CREB1 targets involved in the process of memory formation.SIGNIFICANCE STATEMENTThis study elucidates the role of a specific isoform of CREB1/CRH-1, CRH-1e, inCaenorhabditis elegansmemory formation and chemosensation. Removal of this single isoform ofcreb1/crh-1shows defects in long-term memory formation in the animal and expression of CREB1/CRH-1e in a single pair of neurons is sufficient to rescue the memory defects seen in the mutant animals. We further show that two specific amino acids of CRH-1 are required for the process of memory formation in the animal.
Imbalanced Corticospinal and Reticulospinal Contributions to Spasticity in Humans with Spinal Cord Injury
Authors: Sangari Sina , Perez Monica A. 
Published: August 2019

Damage to the corticospinal and reticulospinal tract has been associated with spasticity in humans with upper motor neuron lesions. We hypothesized that these descending motor pathways distinctly contribute to the control of a spastic muscle in humans with incomplete spinal cord injury (SCI). To test this hypothesis, we examined motor-evoked potentials (MEPs) elicited by transcranial magnetic stimulation over the leg representation of the primary motor cortex, maximal voluntary contractions (MVCs), and the StartReact response (shortening in reaction time evoked by a startling stimulus) in the quadriceps femoris muscle in male and females with and without incomplete SCI. A total of 66.7% of the SCI participants showed symptoms of spasticity, whereas the other 33.3% showed no or low levels of spasticity. We found that participants with spasticity had smaller MEPs and MVCs and larger StartReact compared with participants with no or low spasticity and control subjects. These results were consistently present in spastic subjects but not in the other populations. Clinical scores of spasticity were negatively correlated with MEP-max and MVC values and positively correlated with shortening in reaction time. These findings provide evidence for lesser corticospinal and larger reticulospinal influences to spastic muscles in humans with SCI and suggest that these imbalanced contributions are important for motor recovery.SIGNIFICANCE STATEMENTAlthough spasticity is one of the most common symptoms manifested in humans with spinal cord injury (SCI) to date, its mechanisms of action remain poorly understood. We provide evidence, for the first time, of imbalanced contributions of the corticospinal and reticulospinal tract to control a spastic muscle in humans with chronic incomplete SCI. We found that participants with SCI with spasticity showed small corticospinal responses and maximal voluntary contractions and larger reticulospinal gain compared with participants with no or low spasticity and control subjects. These results were consistently present in spastic subjects but not in the other populations. We showed that imbalanced corticospinal and reticulospinal tract contributions are more pronounced in participants with chronic incomplete SCI with lesser recovery.
Explorando el valor percibido de los estándares de Responsabilidad Social Empresarial en la cadena de valor del pompón-crisantemo en el altiplano del Oriente antioqueño
Authors: Vélez Rivera Diego Andrés , Palacio Aristizábal Sergio Andrés 
Published: August 2019

El presente documento da cuenta de las lógicas bajo las cuales se alinean empresas productoras de pompón-crisantemo en el altiplano del Oriente antioqueño con los sellos y certificados de Responsabilidad Social Empresarial (en adelante RSE). La metodología empleada se fundamenta en las categorías de análisis trabajadas por Vélez & Palacio (2017), que consta de dos componentes, estándares específicos, y costos y beneficios de los estándares y sellos de RSE. Los resultados de la investigación muestran que las certificaciones en responsabilidad social son de gran importancia a la hora de iniciar procesos de expansión con miras a la internacionalización, ya que abren puertas comerciales y posibilitan pertenecer a cadenas de valor global, dando fe que el proceso de producción cuenta por lo menos con los mínimos legales, tanto a nivel ambiental como humano.
Percepción del consumidor en cuatro ferias del agricultor,Costa Rica
Authors: Arboleda Julio Esteban , Mora Camacho Juan Rafael 
Published: August 2019

Este artículo tiene como propósito describir la perspectiva del consumidor que asiste a las ferias del agricultor (FA) de los cantones de Tibás, Santo Domingo, San Isidro y Barva de Heredia, Costa Rica a partir de encuestas que se aplicaron en el 2014 y 2015.
La metodología se fundamentó en el dinamismo y naturaleza de las ferias permitiendo el análisis cualitativo y cuantitativo de las variables que describen el comportamiento del consumidor. Primeramente, se obtuvo un panorama general del funcionamiento de las FA, administradas por los Centros Agrícolas Cantonales (CAC); posteriormente, se planteó un muestreo aleatorio simple para la selección de las distintas ferias y los consumidores dentro de cada una de ellas. En el análisis y síntesis de la información se llevó a cabo una descripción estadística en cuanto a aspectos del consumidor, demográficos y socioeconómicos.
Se encontró en el estudio que ciertos problemas generalizados están relacionados con la falta de infraestructura, inocuidad y calidad de los alimentos, entre otros; por otro lado, los consumidores manifiestan comprar legumbres, verduras y frutas como productos prioritarios. Las FA son percibidas por el consumidor como aceptables y los tramos son percibidos como regular. Tanto las ferias y tramos se encuentran en una línea vulnerable de competitividad sugiriendo trabajar en las áreas estratégica orientadas para el fortalecimiento en los aspectos culturales e histórico preferidos por los consumidores.
Bureaucratizing Sharia in Modern Indonesia: The Case of Zakat, Waqf and Family Law
Authors: Jahar Asep Saepudin 
Published: August 2019

This article examines the “bureaucratization” of Sharia in Indonesia, giving special attention to zakat, waqf and other aspects of family law. The bureaucratization of Sharia aims to modernize the legal system for Muslims in order to provide certainty and justice in solving legal disputes. While some scholars view the incorporation of Sharia into state law as an attempt at Islamization, this study argues that this process reflects increasing bureaucratization rather than Islamization. The incorporation of Sharia into state law is a project of formalizing a state-defined brand of Islam and Sharia legislation. This phenomenon has precedence in premodern Muslim governance and can be traced from the colonial period. In contemporary Indonesia, the Ministry of Religious Affairs and religious courts have played a central role in bureaucratizing Sharia. To support the argument, this study will explore Indonesian family law, including zakat and waqf.
O brincar, um aliado na intervenção psicopedagógica
Authors: Pereira Millis Aparecida , Gonzalez Maria do Carmo Borges 
Published: August 2019

O presente trabalho tem por objetivo discutir o brincar como aliado na intervenção psicopedagógica, por ser este um recorrente recurso na busca por auxiliar crianças com dificuldades e transtornos de aprendizagem. Também visa discutir como as distintas teorias sobre o brincar e as estratégias de ensino e aprendizagem aplicadas por psicopedagogos de maneira consciente ou intuitiva. Para tanto, apresenta definições e diferenças de termos como brincadeira e jogo. A brincadeira é vista na literatura como um expediente/maneira que pode estimular o desenvolvimento infantil e proporcionar meios facilitadores para a aprendizagem significativa. A partir disso, podemos concluir que ao utilizar a brincadeira como um recurso psicopedagógico o profissional busca, quase sempre intuitivamente, aproveitar a motivação própria das crianças, tornando mais atraente o processo de aprendizagem. Entretanto, percebe-se que para alguns profissionais do ambiente escolar a brincadeira é vista como uma pausa no aprendizado – embora para as crianças o ato de brincar envolva todo um processo que muitas das vezes se transforma em facilitador para a aprendizagem.
Nonlinear Optical Tweezers As an Optical Method for Controlling Particles with High Trap Efficiency
Authors: Quy Ho Quang 
Published: August 2019

Optical tweezers have seen as an essential tool for the manipulation dielectric microparticles and nanoparticles due to its non-contact action and high resolution of optical force. Up to now, there has been a lot of optical tweezers applications in the fields of biophysics, chemistry, medical science and nanoscience. Recently, optical tweezers have been theoretically and experimentally developing for the nanomechanical characterization of various kinds of biological cells. The configuration of optical tweezers has been day after day improving to enhance the trapping efficiency, spatial and temporal resolution and easy to control trapped objects. In common trend of optical tweezers improvements, we will discuss in detail of the several configurations of nonlinear optical tweezers using nonlinear materials as the added lens. We will also address the advantages of nonlinear optical tweezers, such as enhance optical efficiency, reduce trapping region, simplify controlling all-optical method. Finally, we present discussions about the specific properties of nonlinear optical tweezers used for stretch DNA molecule as example and an ideal to improve nonlinear optical tweezers using thin layer of organic dye proposed for going time.
Tomada de decisão do gestor escolar das escolas públicas de ensino médio no Distrito Federal e a interface com o letramento informacional
Authors: Pereira Patrícia Resende , Gasque Kelley Cristine Gonçalves Dias 
Published: August 2019

O estudo analisou o comportamento de busca e uso da informação para a tomada de decisão do gestor escolar, em relação aos padrões de letramento informacional nas escolas de ensino médio do Distrito Federal da rede pública de ensino. A pesquisa é de natureza quali-quantitativa, com uso de documentos oficiais do sistema educacional do Distrito Federal, questionário e entrevista semiestruturada. Os resultados mostram que o principal acesso à informação é realizado pela internet e que o volume de dados, aliado à falta de tempo para obtenção de informações, dificulta a tomada de decisão. Para tomar decisões, os gestores consultam informações disponíveis na escola, além do projeto político pedagógico. Verificam a origem da informação recebida e os resultados alcançados pela escola nas avaliações externas do governo. Por fim, os dados coletados pelos gestores educacionais, em relação aos padrões do letramento informacional, mostram o desenvolvimento de poucas habilidades e a necessidade de formação sistemática e adequada para aprender a lidar com a informação.
The Effect of High Quality Feed Supplement on Growth Performance Post-Weaning Calves
Authors: Gading Besse Mahbuba We Tenri , Panjono Panjono , Agus Ali 
Published: August 2019

This research aimed to evaluate the effect of high quality feed supplement (HQFS) in growth performance of post-weaning calves. Twenty four calves post-weaning aged 6 months old, consisting of 12 males and 12 females, randomly divided into 2 groups, each group consisting of 6 calves. Grouping male and female calves fed control feed plus HQFS, was formulated from corn grain, corn gluten meal (CGM), pollard, soybean meal (SBM), wheat flour and agromix booster (treatment diet) as first group (treatment), and the second group was fed control feed without addition of HQFS (control). This study was conducted for 6 weeks. The variables observed included feed intake (dry matter, crude protein, and TDN), weight gain, feed conversion, feed cost per gain and body size (body length, chest girth, and withers height). The treatment was in factorial 2x2 in a Completely Randomized Design (CRD). Growth performance of post weaning calves were analyzed as repeated measures with feed (treatment and control) and sex (male and female) as factors. Results showed that the CP consumption, ADG and chest girth of treatment group was higher than (P<0.01) than the control group (0.42 and 0.34 kg/d, 0.95 and 0.71 kg/d, and 12.41 and 8.25 cm). TDN consumption, feed conversion, and body length of the treatment group were higher (P<0.05) than the control group (3.08 and 2.57 kg/d, 3.64 and 4.86, and 8.12 and 5.95 cm). DM consumption, chest girth and feed cost per gain of treatment and control group were not significant (3.87 and 3.69 kg/d, 7.30 and 6.72 cm, and IDR 16,280.00 and IDR 19,167.00). There was no difference between the growth of post-weaning calves between the male and female groups. There was no interaction between feed type and sex of the post-weaning calves. The conclusion of this study was that post-weaning calves fed HQFS (20.2%) produced better growth performance than controls.
Social Isolation, Loneliness, and Mental and Emotional Well-being among International Students in the United States
Authors: Girmay Mehrete , Singh Gopal K. 
Published: August 2019

Background: Loneliness and social isolation have the ability to affect an individual's mental and physical health. With research linking both to morbidity and premature mortality, their effects must be viewed as important public health problems. Loneliness and social isolation can be especially pronounced in the international student community, particularly at the university level, as this population encounters challenges assimilating to their host university, surrounding community, and host country. This study explores the risks and sociocultural factors associated with loneliness, social isolation, and psychological distress with regards to the overall adjustment of international students.
Methods: In this qualitative, narrative case study, 10 international graduate students at a university in the United States participated in two focus group sessions followed by individual interviews. Thematic areas and topics were identified using Barrer's three models of social support. Study was completed between December 2016 and September 2017.
Results: All of the participants shared that they had experienced loneliness and social isolation at some point during their acculturative process resulting in perceived xenophobia and a sense of insincerity on behalf of domestic students when attempting to forge connections. For some, these experiences elicited feelings of depression, a disinterest in building connections with domestic students, and in attending social events held on campus and within the community, further exacerbating feelings of loneliness and social isolation.
Conclusions and Implications for Translation: Results shed light on the impact that poor acculturation can have on the student's mental and physical health and how bridges between the international and non-international communities can be built and more importantly, sustained. There is a critical need for more effort to be focused on attending to both the mental and physical health needs of migrant students during their stay at the host university.
Key words: • Acculturation • Social Isolation • Loneliness • Mental Health • International • Student

Copyright © 2019 Girmay and Singh. This is an open-access article distributed under the terms of the Creative Com- mons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.