bluuebunny/crossref_metadata_2025 huggingface dataset:
The Social Construction of Giftedness
Authors: Parekh Gillian , Brown Robert S. , Robson Karen
Published: July 2018

Wide socio-demographic disparities exist between students identified as gifted and their peers (De Valenzuela, Copeland, Qi, & Park, 2006; Leonardo & Broderick, 2011). In this paper, we examine the intersectional construction of giftedness and the academic achievement of students identified as gifted. Using data from the Toronto District School Board (TDSB), the largest and one of the most diverse public education systems in Canada, we consider racial, class, and gender characteristics of students identified as gifted in comparison to those who have very high achievement. Results demonstrated that there was almost no relationship between students identified as gifted and students who had very high achievement (Pearson’s correlation of 0.18). White, male students whose parents had high occupation statuses had the highest probability of being identified as gifted. Female students were more likely to be high achievers. Compared to White students, it was only East Asian students who were more likely to be identified as gifted; yet South, Southeast and East Asian students were more likely to be very high achievers. Parental occupation was strongly related to both giftedness and very high achievement. Results point to the socially constructed nature of giftedness and challenge its usage in defining and organizing students in schools.
Resident Work in High-Support Housing
Authors: Haley Tobin LeBlanc
Published: July 2018

While feminist political economists have identified social service provisioning as socially reproductive work and have examined its reorganization under neoliberalism, little attention has been paid to the mental health care sector. Furthermore, within feminist political economy scholarship on work in the social service sector, little attention has been paid to the contributions of service users. I address some of these gaps by developing a Mad feminist political economy framework to analyze the unpaid socially reproductive work completed by residents in high-support psychiatric housing in Ontario today.

Drawing on data from interviews with 23 residents and 15 service providers in high-support psychiatric housing in Ontario, as well as a review of government and non-profit organization documents, I argue that the work done by residents alleviates demands on social service workers in a time of neoliberal restraint, intensified workplace demands, and a heightened focus on service user independence in all aspects of life. I then conclude with recommendations for change.
Autonomously Autistic
Authors: Williams Anna
Published: July 2018

The locus of pathology exists not in the autistic person, but in the interaction between a hostile environment and the subjugated autistic. It is essential for parents, practitioners, educators, and autistic people themselves to ask the crucial question—  Is the autistic a machine, or an organism? Are we active agents in our own embodied experience, or are we a locus of behavior? It is not with defiance, but autonomy, that I declare as an autistic person— I am not a manifestation of stimuli and response. I am agential. I am Autonomously Autistic.
Special Focus Introduction
Authors: Holmes Morgan
Published: July 2018

This special focus issue for the Canadian Journal of Disability Studies brings together three essays that destabilize normative requirements for “healthy sexuality”, calling into question the ways in which some people are institutionally held outside of or beyond the capacity for maintaining a sexuality at all, never mind a “healthy” one.
"Healthy Sexuality": Fucking with Notions of Disability (In)Justice
Authors: Goldberg Cara E.
Published: July 2018

A progression towards the non-tokenistic inclusion of people with disabilities (PWD) in society, and of PWD’s needs in legal processes, necessarily entails acknowledging and respecting disability-informed approaches to sensual and sexual experience, expression, and connection.
Review of Vulnerability in Resistance by Judith Butler, Zeynep Gambetti, and Leticia Sabsay (2016)
Authors: Jones Chelsea Temple
Published: July 2018

In Vulnerability in Resistance, editors Judith Butler, Zeynep Gambetti, and Leticia Sabsay explain that the work of taking up both vulnerability and resistance as a generative pairing of concepts comes with claims “both risky and true”. They point to the construction of “the suffering other” as an emergent part of social relations, explaining vulnerability as a process both exacerbated and disavowed as means of achieving power (4).
Food Additives and Child Health
Authors: Trasande Leonardo , Shaffer Rachel M. , Sathyanarayana Sheela ,   COUNCIL ON ENVIRONMENTAL HEALTH, Lowry Jennifer A. , Ahdoot Samantha , Baum Carl R. ,   FACMT, Bernstein Aaron S. , Bole Aparna , Campbell Carla C. , Landrigan Philip J. , Pacheco Susan E. , Spanier Adam J. , Woolf Alan D.
Published: July 2018

Increasing scientific evidence suggests potential adverse effects on children’s health from synthetic chemicals used as food additives, both those deliberately added to food during processing (direct) and those used in materials that may contaminate food as part of packaging or manufacturing (indirect). Concern regarding food additives has increased in the past 2 decades in part because of studies that increasingly document endocrine disruption and other adverse health effects. In some cases, exposure to these chemicals is disproportionate among minority and low-income populations. This report focuses on those food additives with the strongest scientific evidence for concern. Further research is needed to study effects of exposure over various points in the life course, and toxicity testing must be advanced to be able to better identify health concerns prior to widespread population exposure. The accompanying policy statement describes approaches policy makers and pediatricians can take to prevent the disease and disability that are increasingly being identified in relation to chemicals used as food additives, among other uses.
Lower estimates on the saturation order of approximation of twice continuously differentiable functions by piecewise constants on convex partitions
Authors: Kozynenko O.V.
Published: July 2018

We consider the problem of approximation order of twice continuously differentiable functions of many variables by piecewise constants. We show that the saturation order of piecewise constant approximation in $$$L_p$$$ norm on convex partitions with $$$N$$$ cells is $$$N^{-2/(d+1)}$$$, where $$$d$$$ is the number of variables.
Local polynomial approximation and intersection of confidence intervals for removing noise of lightning electric field measurements
Authors: Rojas-Cubides Herbert Enrique , Cortés-Guerrero Camilo Andrés , Forero-Mejía María Carolina
Published: July 2018

Las mediciones de campo eléctrico producido por rayos (LEF) son señales aperiódicas caracterizadas por ruido inherente de diferentes fuentes, es decir, no es posible registrar una señal libre de ruido. En la última década, se ha logrado filtrar mediciones de LEF utilizando algunas representaciones tiempo-frecuencia tales como la transformación de Fourier de corto tiempo (STFT), la transformación wavelet (WT) y la transformación de Fourier fraccionaria (FRFT) sin resultados definitivos. En este trabajo, se propone un proceso de eliminación de ruido aplicado a mediciones de LEF usando la aproximación polinomial local (LPA). La selección del tamaño de la ventana se realiza combinando la LPA con el algoritmo de intersección de intervalos de confianza (ICI). Además, un criterio de validación cruzada se utiliza para seleccionar el valor óptimo del umbral en el método de reducción de ruido LPA-ICI. Se muestra que para diferentes valores de relación señal-a-ruido (SNR), el método propuesto reduce significativamente el ruido presente en las señales registradas. Finalmente, se realiza una discusión sobre las señales procesadas en términos de algunas características temporales del campo eléctrico.
Monitoreo de la degradación de los vehículos de transporte de cargas a través de la disponibilidad
Authors: Penabad-Sanz Laksmi , Rodríguez-Ramos Pedro Antonio , Iznaga-Benítez Arsenio Miguel
Published: July 2018

La aplicación de enfoques de toma de decisión basados en el monitoreo de la degradación de los sistemas a situaciones reales presenta un grupo de barreras tales como la complejidad de los métodos, la disponibilidad de datos, tecnología y personal capacitado. En este trabajo se propone una vía para el monitoreo del estado del vehículo de transporte de cargas a través de la disponibilidad. Para ello se introduce la condición límite de uso racional de los vehículos y se presenta la expresión de la disponibilidad límite vinculada a los resultados económicos de la operación del vehículo, lo que posibilita valorar la conveniencia de la operación del mismo. La aplicación de la propuesta a una flota ilustra sus posibilidades en condiciones reales, obteniéndose un grado de acuerdo "Casi perfecto" entre los resultados del análisis de la disponibilidad y el resultado económico de la operación del vehículo.
Módulo de corte de relaves mineros a partir de ensayos de columna resonante
Authors: Martínez-Rojas Eliana , Molina-Gómez Fausto , Ruge Juan Carlos
Published: July 2018

En este artículo se presentan los resultados de setenta y dos ensayos de columna resonante desarrollados en dos tipos de materiales provenientes de los depósitos de estériles de las minas de Riotinto (Huelva-España). La metodología de ensayo incorporó diferentes condiciones de presión efectiva de consolidación y nivel de excitación torsional. El equipo utilizado para la ejecución de las pruebas fue una columna resonante de base fija y extremo superior libre. Las presiones efectivas de consolidación se establecieron dentro de un rango variable entre 50 - 300 kPa y las excitaciones torsionales fueron iguales a 0.025, 0.05, 0.1, 0.2, 0.4 y 0.8 V. Se encontró que dichas combinaciones de ensayo conducen a deformaciones angulares que varían entre 0.003% y 0.148%. Los resultados indican que es posible establecer funciones empíricas sencillas del módulo de rigidez como una función de la deformación angular y de la presión efectiva de consolidación.
Análisis de la bioactividad de Mg AZ31 recubierta por PEO (Plasma Electrolytic Oxidation)
Authors: Dorado-Bustamante Kevin , Zuluaga-Díaz Benjamín , Estupiñán-Duran Hugo
Published: July 2018

El Magnesio es un material que presenta propiedades favorables para su selección como biomaterial; sin embargo, su aplicación se ve restringida por la rápida corrosión. En esta investigación se evaluó la modificación superficial de magnesio AZ31 mediante PEO y su efecto sobre las propiedades protectoras y bioactivas. La microestructura, composición de la fase y la distribución de los elementos en el recubrimiento fue caracterizada mediante MEB, DRX y EDX. La estabilidad química, la resistencia a la corrosión, la bioactividad y las propiedades electrónicas se evaluaron usando EIE y Mott-Schottky en solución de fluido corporal simulado. El análisis de DRX y EDX índico la presencia de MgO, MgSiO4 en los recubrimientos. Un análisis de la sección transversal presento un recubrimiento compacto cerca al sustrato seguido por un estrato poroso en la superficie. Del análisis de EIE se mostró que el tratamiento incrementa la protección del sustrato en un medio fisiológico simulado.
Analysis of the European tourist mines and caves to design a monitoring system
Authors: Sanmiquel Lluís , Alfonso Pura , Bascompta Massanés Marc , Vintró Carla , Parcerisa David , Oliva Josep
Published: July 2018

Se ha creado una base de datos de cuevas y minas turísticas para investigar los requerimientos necesarios para implementar un sistema integrado de monitorización capaz de mantener las condiciones de seguridad de los visitantes y el ambiente adecuado de la actividad. Dicho sistema controla las principales características físicas, geológicas y de información del sitio. Los resultados detallan las principales condiciones de las cuevas y minas turísticas, mostrando los parámetros importantes a controlar: Número de visitantes, temperatura, ruido, concentraciones de gas y movimientos del terreno, entre otros. Todos estos parámetros son fundamentales para mantener la seguridad de los turistas y guías, así como para preservar la biodiversidad y formaciones geológicas particulares de cada sitio. La información incluida en este estudio se usará para obtener un producto similar al mostrado en los casos de estudio.
An Environmentally Friendly University Library Based on Renewable Hybrid Energy Systems
Authors: DURSUN Bahtiyar
Published: July 2018

This paper presents a techno-economic analysis of hybrid renewable energy systems (HRES) to supply the electrical load requirements of the Central Library of Istanbul Esenyurt University located in Istanbul, Turkey. The standalone HRES (PV/Wind/Fuel Cell/Electrolyzer, PV/Fuel Cell/Electrolyzer and Wind/Fuel Cell/Electrolyzer etc.) considered in the analysis were comprised of different combinations of PV modules, Fuel Cell and wind turbines supplemented with hydrogen storage. Meanwhile, wind and solar energy potential in Esenyurt region in Istanbul is fairly appropriate for supplying energy requirements of some places with no high electricity load like libraries. In this study, the HOMER software is used as the assessment tool to determine the optimal configuration of HRES taking total net present cost (NPC) and cost of energy (CoE) into consideration. As a result, it is determined that the optimal system configuration of standalone Wind/PV/Fuel Cell/Electrolyzer hybrid renewable power generation system with the lowest total NPC consists of 25kW PV array, 40kW Wind turbine, 20kW Fuel Cell, 25kW power converter, 50kW electrolyzer and 100kg hydrogen tank and also that total NPC and CoE of the optimal configuration are estimated to be $809,442, $2.040/kWh, respectively.  Renewable fraction of the hybrid system is 100%. Electricity generated through this hybrid system is completely clear and no harmful emission gases in this hybrid system are generated and there is no contribution of the HRES to the pollution of environment.
A Comprehensive Study on Service Quality and Satisfaction Level to the English Medium Education System in Bangladesh
Authors: Kader Md. Abdul , Salam Md. A.
Published: July 2018

This study investigated quality of teachers, teaching technique, students’ quality, their back ground, campus discipline, tuition fees, examination system, curriculum, teacher behaviors, lesson delivery and sequence of content and learning expectations used by teachers of English medium schools and colleges in Dhaka, Bangladesh. This research focused on overall quality of service and satisfaction level of students, guardians and teaches regarding English Medium Education (EME) in Bangladesh. This research brings broader understanding of strategies for teaching English reading and writing to students whose first language is not English. Results reflect analysis of face-to-face interviews with four hundred guardians, students, teachers and administrators of English Medium schools and colleges. The theoretical framework for this study draws from Collier's Conceptual Model, Acquiring a Second Language, explaining the complex interacting factors students experience when acquiring a second language. Emerging from the data are nine effective teaching strategies that teachers of English learners can add to their repertoire.
The Effect of Career Development and Organizational Culture to Employee Performance with Motivation of Work as Intervening Variable in Cooperation in Denpasar Village
Authors: Manggis I Wayan , Yuesti Anik , Sapta I Ketut Setia
Published: July 2018

Research on career development and organizational culture on performance with work motivation as intervening variable is done at cooperative located in Pedungan village of South Denpasar Pedungan Village is a village located in South Denpasar District, Denpasar City, Bali Province. The development of cooperatives is currently supported by the development of small and medium enterprises (SMEs). The number of cooperatives in the village pedungan is 33 cooperatives with the total number of employees is 338 employees. The purpose of this study is to know and examine the influence of career development on employee performance in cooperative in rural village, To know and test the influence of organizational culture on employee performance in cooperative in rural village, to know and test the influence of career development on employee motivation at cooperative in to know and examine the influence of organizational culture on employee motivation in cooperative in rural village, To know and to test influence of work motivation to employees performance at Cooperative in rural village. This research is a quantitative research using primary data obtained from the questionnaire and measured by using Likert scale. The population of this research is employees at Cooperative in rural village as many as 85 people. The method of selecting the sample of this study using Proportionate Stratified Random Sampling is this technique is used when the population has members who are not homogeneous and stratified proportionally. Data analysis technique used in this research is Structural Equation Modeling (SEM) based on Partial Least Square (PLS) using SmartPLS 3.0 program. The result of the research shows that (1) career development has positive and significant effect to work motivation, (2) organizational culture have positive and significant effect to work motivation, (3) career development have positive and significant effect to employee performance, (4) and (5) the influence of mediation of work motivation variable on indirect influence of career development on partial performance, and (7) influence of mediation of work motivation variable on the influence of unbalanced direct organizational culture to performance is partial
Cerebral phenotype of the MPV17 variant c.106C>T
Authors: Finsterer Josef , Scorza Fulvio A. , Fiorini Ana C C , Scorza Carla A. , Almeida Antonio Carlos
Published: July 2018

.
Effects of self-management support and family participation enhancing program for delayed progression of diabetic nephropathy in Thai adults with type 2 diabetes
Authors: Thojampa Somsak
Published: July 2018

Abstract

Background/Purpose: Type 2 diabetes mellitus (DM) is increasingly becoming common in developing countries including Thailand. Uncontrolled hyperglycemia can lead to progression of severe complications for persons with DM which include diabetic nephropathy and can, later on, lead to kidney failure. Self-management support and participation of social groups, specifically the family of the patient, can help people with DM in controlling the complications of their disease from progressing; in this case, the advancement of diabetic nephropathy. The aim of this research is to develop a program and determine if self-management support with the participation of the family members will have an effect in delaying the progress of diabetic nephropathy in adults with type 2 DM.

Theoretical Framework: Self-management based on social cognitive and self-regulation theories were used in this study to set a framework which utilizes social support from the family and self-efficacy of patients in implementing self-management activities.

Methods: This is a quasi-experimental research. The sample consisted of 50 Thai adults with type 2 DM, 25 for the control group and 25 for the experimental group. The participants in the experimental group attended a self-management support and family participation enhancing the program for 8 weeks. The interventions included a video presentation, manual, and health education with a family member in a focus group. Data were collected before attending the program and evaluated on the 8th and 12 weeks after the program. The instruments used for the data collection were (1) Self-Management Activity Questionnaire (SMAQ), (2) Self- Efficacy Questionnaire (SEQ). The data collected for clinical outcome used the automatic physiological measures: Systolic and Diastolic blood pressure, Hemoglobin A1c (HbA1c), serum creatinine (SCr) and estimated glomerular filtration rate (eGFR).  Data were analyzed using descriptive statistics, Independent t-test and Paired t-test and repeated measurement ANOVA.

Results: The mean scores of the self-management activity and self-efficacy of the experimental group were significantly higher, their clinical outcomes for blood pressure, SCr and HbA1C levels were significantly lower, and eGFR results were significantly higher after attending the self-management support and family participation enhancing the program.

Conclusions and Implications: The findings of this study indicate that the self-management and family participation enhancing program promote and support health behavior change and leads to better control of the delayed progression of diabetic nephropathy in Thai adults with type 2 DM. This can be applied by health care professionals in health care centers as a supplement to their usual care in dealing with persons with type 2 DM.
High Density Lipoprotein (HDL) Cholesterol levels in young pregnant Women
Authors: Suman Shishir Kumar
Published: July 2018

A woman's reproductive history may affect her risk for coronary heart disease. Parity has been associated with increased coronary disease risk in some studies, while other studies have shown that nulliparous women are at increased risk (1-3). Pregnancy fre­quency (including frequency of spontaneous abortion (4, 5)) and age at first pregnancy (6) have also been associated with increased coronary disease risk. Although reports of associations of coronary disease risk with parity, age at menarche, or incidence of miscar­riage are not all consistent (7, 8), the majority of cohort studies have shown an increased risk of coro­nary disease among women with high gravidity or parity (9). Long-term effects of pregnancy on coronary disease risk factors, such as lipoproteins (10, 11), are potential mechanisms for an association between par­ity and coronary artery disease risk.

Marked increases in lipoprotein concentrations oc­cur during pregnancy (12) and have been correlated with pregnancy-related increases in insulin, 17-beta estradiol, progesterone, and human placental lactogen (13). Total and low density lipoprotein (LDL) choles­terol and triglyceride levels progressively increase during gestation (10, 14). Although triglycerides have been reported to decrease rapidly during the postpar­tum period, total and LDL cholesterol levels may require several months to return to baseline (10, 14). High density lipoprotein (HDL) cholesterol, which has been shown to be inversely associated with coronary disease risk among women (15, 16), peaks at mid- gestation and then falls to levels approximately 15 percent above baseline at term (12). Few data are available on the long-term effects of pregnancy on lipoproteins; however, there are reports of inverse associations between parity and postpartum HDL cho­lesterol levels (17-20). In order to examine further relations of parity with lipid risk factors, we assessed plasma lipids at baseline and at the year 1 and year 2 follow-up examinations among young adult women in an ongoing epidemiologic study.
Prosthetically Driven Therapy for a Patient With Systemic Lupus Erythematosus and Common Variable Immunodeficiency: A Case Report
Authors: Drew Alexander , Bittner Nurit , Florin Whitney , Koch Alia
Published: July 2018

Patients who have systemic diseases in conjunction with severely resorbed maxillary and mandibular bone present challenges for dental implant therapy and rehabilitation. This case report describes the interdisciplinary comprehensive treatment completed on a patient with systemic lupus erythematosus (SLE) and common variable immunodeficiency (CVID). Patients with these systemic conditions present a multifactorial challenge for dental treatment due to advanced carious lesions, missing teeth, lack of adequate bone quality and quantity, as well as secondary effects of their medications. The sequence of treatment presented allowed for the necessary case control to ensure successful, predictable reconstruction of the edentulous patient with limited bone available for implant placement. For this patient, we used a combination of autogenous iliac bone graft, bilateral maxillary sinus lifts with BMP-2, transitional implants, and dental endosseous root form implants. Digital dentistry aided in designing the final implant supported fixed restorations. Transitional implants eliminated the need for tissue-borne prostheses, avoiding pressure to the graft and implants. Digital dentistry allowed for prosthetically driven implant placement and a functional, esthetic result. The techniques and staging presented for implant placement and rehabilitation can be used for other patients presenting with similar challenging conditions.
Educación para la salud: horizontes y estrategias recurrentes en Argentina (1970-1980)
Authors: Reyna Carla
Published: July 2018

Este artículo analiza las transformaciones de la política de educación para la salud en Argentina, enmarcadas en la estrategia de Atención Primaria de la Salud. El objetivo fue identificar la recepción de las recomendaciones internacionales y su circulación y reproducción local. La primera sección revisa, a fines de los 1960, el contexto de crisis hegemónica del modelo sanitario en América Latina; las respuestas de legitimación de la estrategia de Atención Primaria de la Salud en encuentros internacionales y la propuesta de un nuevo horizonte disciplinar en educación preventiva. El segundo apartado focaliza en la recepción de estas ideas en Argentina en la década de 1970, según las características editoriales de la revista “Educación para la Salud”, publicada por el Departamento de Educación para la Salud, durante el período 1970-1980.
Association between parent materials and soil attributes along different geological environments in western Pará, Brazil
Authors: BARROS Gerson Moreira , SANTOS Jean Cheyson Barros dos , SOUZA JÚNIOR Valdomiro Severino de , DELARMELINDA Elaine Almeida , ARAÚJO FILHO José Coelho de , CÂMARA Elis Regina Guimarães
Published: July 2018

ABSTRACT The expansion of the agricultural frontier into different geological environments in the west of the state of Pará, northern Brazil, makes it necessary to know the influence of the parent material on local soil attributes. This study aimed to evaluate the influence of different parent materials on five soil profiles along a lithosequence exposed by the BR-163 highway, which runs from north to south through western Pará. The soils were classified, morphologically described and their main horizons sampled for physical, mineralogical and chemical analyses, including the determination of micronutrients, forms of phosphorus and secondary forms of iron. Multivariate analysis was used to group the different soil-parent material associations. The results demonstrated that the diversity of the parent material was a determinant of soil attributes, and was a conditioning factor for the formation of different clay minerals. Multivariate analysis grouped the soils along the lithosequence into a group formed by profiles derived from basic and intermediate igneous rocks, and a second group consisting of profiles derived from sediments and sedimentary rocks. The profile derived from acidic igneous rock showed greater similarity with the profiles derived from sedimentary materials in comparison to those derived from other igneous rocks.
Numerical Investigation For Convective Heat Transfer and Friction Factor Under Pulsatile Flow Conditions
Authors: Aslan Erman
Published: July 2018

Under
pulsatile flow conditions, the characteristics of convective heat transfer and
friction factor for periodic corrugated channel are investigated numerically.
The Finite Volume Method (FVM) is used in the numerical study. Three different
Reynolds Averaged Numerical Simulation (RANS) based turbulence models, namely the k-ω, the Shear Stress Transport
(SST) and the transition SST model are employed and compared with each other.
The results are also compared with the previous measurements performed for
non-pulsating conditions. Investigations are performed for air flowing through
corrugated channel which has sharp corrugation peak with an inclination angle
of 30° and a 5mm minimum channel height. Reynolds number is varied within the
range 6294 to 7380, while keeping the Prandtl number constant at 0.70. Four
different sinusoidal pulsatile flow conditions, which are combination of two
different frequencies and two different amplitudes, are used. Variations of the
Nusselt number and friction factor with the Reynolds number are studied.
Effects of the amplitude and period of sinusoidal pulsatile flow conditions are
discussed.
STRUCTURE AND MAGNETIC PROPERTIES OF WC–50%Cо MODEL ALLOYS CONTAINING TaC ADDITIVES
Authors: Zaitsev A. A. , Konyashin I. Yu. , Avdeenko E. N. , Shvyndina N. V. , Levashov E. A.
Published: July 2018

The structure and magnetic properties of model high-cobalt WC–50%Co alloys with different carbon content and 1,6–5,6 wt.% TaC additives are studied. Model alloys are obtained by liquid-phase sintering of powder mixtures at 1420 °C, and their composition is described by the formula: 50%Co + 50%WC + xTaC + yC, where x = 0; 1,6; 2,6; 3,6; 4,6; 5,6 wt.%, y = 0; 0,2; 0,5 wt.%. It is shown that (Ta,W)C phase precipitates are present in all the investigated alloys, whereby at up to 3,6 wt.% TaC concentration the (Ta,W)C grains have a needle shape, and at ³3,6 wt.% TaC concentration the shape of the (Ta,W)C grains becomes spherical. (Ta,W)C phase precipitates are located both in the Co-binder and along the WC grain boundaries. The (Ta,W)C phase lattice parameter in low-carbon alloys lies in the range from 0,4438 nm for the 1,6 % TaC alloy up to 0,4451 nm for the 4,6 % TaC alloy. According to EDX analysis, the concentration of dissolved tungsten in the cobalt phase is independent of the TaC content and strongly depends on the total carbon content, and for alloys with high, elevated and low carbon content it is 7, 12 and 17 wt.%, respectively. TaC addition in alloys with a low and elevated carbon content leads to an increase in coercive force by 875 A/m and a decrease in magnetic saturation by 5–10 Gs·m3/g. The experimental results allowed putting forward a hypothesis about the possibility of forming dispersed tantalumcontaining precipitates in the binder phase.
RATIONAL PROCESSING OF REFRACTORY COPPER-BEARING ORES
Authors: Ignatkina V. A. , Bocharov V. A. , Makavetskas A. R. , Kayumov A. A. , Aksenova D. D. , Khachatryan L. S. , Fishchenko Yu. Yu.
Published: July 2018

The paper presents the results obtained when studying material compositions of four samples of refractory copper-bearing ores from the Uzelga deposit along with technological solutions to improve their processing parameters. The refractoriness of ores is associated with a thin dissemination (up to a micron size) and close intergrowth of ore and rock minerals. Ferrous sulfides are represented by a wide range of minerals: pyrite, marcasite and their variety melnikovite, arsenic pyrite and arsenopyrite; sooty melnikovite has a higher flotation activity. The reduction of iron sulfides from 89 to 29 % is followed by a proportional increase of easy-floatable rock minerals to 45 % and clay to 9 %. These properties make these sulfides difficult to process (float) and maintain ore refractoriness. The content of copper sulfides in ore samples varies from 3,32 to 7,29 %; the relative fraction of copper sulfide in a form of tennantite in different deposit samples varies from 29 to 93 %. Copper is also present as chalcopyrite and bornite. The best flotation activity of tennantite can be seen in neutral and weak acid media in contrast with standard flotation mode for chalcopyrite and bornite with butyl xanthate in a high-alkaline calcareous medium. Free grains of copper minerals can be selectively extracted into the intermediate flotation copper concentrates when grinding maximum 60 % of the –71-μm class. The technology of flotation in a low-alkaline medium is developed for refractory copper-bearing ores with variable tennantite content using the M-TF selective sulfhydryl collector in intermediate copper flotations and copper concentrate upgrading cycle; aeration used to suppress melnikovite flotation activity makes it possible to achieve 80 % copper recovery into conditioned copper concentrate. Bornite, tennantite, chalcopyrite and sphalerite disseminated in pyrite make it rational to obtain copper-pyrite, copper-zinc-pyrite products with their yield up to 12 % for pyroand hydrometallurgical processing.
CONDUCTIVE TIB2–ALN–BN-BASED COMPOSITE SHS CERAMICS
Authors: Karpov A. V. , Konovalikhin S. V. , Borovinskaya I. P. , Sachkova N. V. , Kovalev D. Yu. , Sytschev A. E.
Published: July 2018

The paper studies the microstructure, phase composition, and electrical conductivity of TiB2–AlN–BN-based composite ceramics obtained by self-propagating high-temperature synthesis (SHS). Electrical resistivity dependence on temperature was measured in the range Т = 300÷1300 K in a vacuum of 2·10–3 Pa using a standard 4-point DC technique. It is found that higher TiB2 content in the initial composition (from 60 to 80 wt.%) and lower Al content (from 20 to 40 wt.%) results in increased TiN and BN content in synthesis products, and decreased TiB2 and AlN content as a result of TiB2 reaction with nitrogen. Lower Al content in the initial mixture leads to lower AlN content in synthesis products. According to the results obtained, electrical resistivity curves are inconsistent during the «heating–cooling» cycle for all ceramic compositions due to changes in the contact zone of conducting phases in the temperature range Т = 800÷1200 К. Three specific temperature ranges were identified: (I) 300 to 800 K when ρ values increase monotonically with increasing temperature, while heating and cooling ρ(Т) curves coincide completely; (II) Т = 800÷1200 К when electrical resistivity behavior varies – its values strongly depend on the sample heat treatment mode; (III) Т > 1200 К, when coincidence of heating-cooling curves is observed.
MACROSTRUCTURE AND STRENGTH OF AL–ZN–SN COMPOSITE PRODUCED BY LIQUID PHASE SINTERING OF AL–ZN ALLOY AND PURE TIN POWDER MIXTURE
Authors: Rusin N. M. , Skorentsev A. L.
Published: July 2018

The paper studies the liquid phase sintering features of compacts made of Al–10Zn alloy and Grade PO 2 tin powder mixture as well as the effect of sintering modes on the structure and strength of the (Al–10Zn)–40Sn antifriction composite formed. The porosity of original raw compacts ranged from 5 to 18 %. They were sintered in a vacuum furnace at a residual pressure of gases lower than 10–2 MPa. Sintering temperature varied from 550 to 615 °С, where partial aluminum wetting with liquid tin was observed. Sample holding time at a given sintering temperature was 30–180 min. Structural studies have shown that the particle size of aluminum and tin phases increased with an increase in sintering temperature and holding time. Mechanical properties of sintered composites were determined by the compression test. Test samples were cut from the middle area of sintered compacts. The tests have shown that (Al–10Zn)–40Sn composite samples have high ductility. Moreover, these samples exhibit higher strength in comparison with Al–40Sn sintered composite with a pure aluminum matrix due to more intensive strain hardening of the matrix at high deformation levels. It was found that the composites obtained when sintering samples with a low initial porosity and subjected to pre-exposure at low temperature have the highest strength. Based on the reported results it can be concluded that the liquid-phase sintering method within the specified temperature range allows to obtain the (Al–10Zn)–40Sn composites with a continuous aluminum matrix to effectively prevent localized deformation in the soft Sn interlayers. The optimum sintering temperature should not exceed 600 °С.
Analysis of the behavior in the informal micro-entrepreneur sector in Colombia
Authors: Fernandez Hurtado Saul Rick , Torres Games Liliana Marcela , Libreros Bonilla Maria Fernanda , Martinez Martinez Luz Angela
Published: July 2018

Objective: The objective of this research is intended to raise awareness among micro-entrepreneurs, students and society in general about the importance of microenterprises in their economic activity. Method: In order to fulfill the general objective of the study, an exploratory research with data has been applied, with information gathered in a time span involving data collected in conjunction with the direct problems that this contract has with the Colombian society. The study was carried out with a sample of 100 micro enterprises and the informal sector in the research located in Cali (Colombia); the instrument for collecting information on informal micro-enterprises was made through surveys, the study was performed in order to obtain real, measurable and attainable data, resulting in a descriptive analysis using the corresponding variables in the research. Results and Discussion: The study showed that a negative correlation was obtained given that there are a number of microenterprises not legally constituted and, therefore, it was found that these belong to the group of family businesses, which makes it clear that the salary variable is not defined by its business variability.Companies will have greater capacity for goods and services and will eradicate informal enterprises, thus the government will obtain higher taxes, but without abusing them, since if taxes are high, it will lead the companies to evade and are not formalized legally. The financial sector should be more competent to the new micro-entrepreneurs, given that being new to the business system; they require greater support through financial resources and government entities. Conclusion: The environment variable of the informal sector concludes that the phenomenon of informality in the country is predisposed to education levels with the purpose of managing unproductive assets under a formal education managed from the management positions. It is necessary and of vital importance that the State takes measures and solutions relevant to the motivation to include the informal sector within the formal sector.
Developing and implementing policy for the mandatory labelling of genetically modified food in South Africa
Authors: De Beer Taryn , Wynberg Rachel
Published: July 2018

Like many other countries, South Africa has come under public pressure to introduce mandatory labelling for genetically modified (GM) foods. Although there is increased understanding of the social and political implications of GM labelling in developed countries, implications for the global South are still poorly understood. South Africa, as a country that consumes, produces and trades GM food, represents a fitting case study of these dimensions in the context of a developing economy. Via policy analysis, stakeholder interviews and document inquiry we offer an overview of the evolution of GM labelling, investigate the central influences on its development and implementation, determine the critical issues and identify the factors impeding or facilitating implementation. Our findings reveal that many significant events and decisions influenced the policy on mandatory GM food labelling in South Africa. They also suggest that several pertinent and problematic issues arose during its development as a result of the contentious nature of GM food labelling; stakeholder opinions, influences, and conflicted positions; and its practical complexity. Key implementation issues included divergent interpretations, and thus high levels of ambiguity; an inefficient National Consumer Commission; a lack of recourse for non-compliance; and the absence of a government-enforcement agency. Lower capacity in developing countries underscores the importance of a participation process that is believable by and inclusive of all actors. Stakeholders’ opinions about the policy development process were affected by their predetermined viewpoints about GMOs. Findings emphasise the  influence of larger policy debates about the acceptability of GMOs on participatory processes, and the importance of contextualising GM labelling policies within such debates.
Significance:

The first review of the evolution of mandatory GM food labelling policy in South Africa is provided.
A knowledge gap with regard to GM food labelling in developing countries is filled.
The importance of procedural fairness in determining the degree of stakeholder satisfaction with policy decisions is revealed.
Symbiodinium / Aiptasia cell pop (crude lysis for PCR template) v1
Authors: Bellantuono Anthony
Published: July 2018

This protocol lyses symbiodinium cells with heat and pellets debris, producing material suitable as crude DNA template for robust PCRs. It is convenient for rapid strain identification from liquid cultures and from Symbiodinium-hosting Aiptasia anemones.
Symbiodinium-enriched RNA extraction from Aiptasia holobiont v1
Authors: Bellantuono Anthony
Published: July 2018

This protocol enriches holobiontExaiptasia pallida tissue forSymbiodinium, removing more than 99% of host tissue while maintaining high RNA integrity (RIN > 7). The symbiont-enriched fraction is subsequently lysed via bead beating and rna isolated using the Qiagen RNeasy Mini kit.
Plant nuclear genomic DNA preps v1
Authors: Hilario Elena
Published: July 2018

The isolation of nuclear genomic DNA of high molecular weight is becoming a crucial step for obtaining long read sequencing data produced by the PacBio and Oxford Nanopore platforms. Although it involves a few more steps than a standard total genomic DNA preparations, it is worth optimizing the protocol to avoid wasting valuable sequence data on organellar DNA. The current protocol has been successfully applied to kiwifruit, apple, mānuka, Nicotiana benthamiana, some solanaceas, and two insects (pupae of the light brown apple moth (Epiphyas postvittana) and hind leg of a weta (Deinacrida spp)). Three alternative methods to extract DNA are also presented.
TB4 Fluorescence Immunohistochemistry v1
Authors: Saunders Vinay , I Wilson David
Published: July 2018

Protocol describing fluorescence immunohistochemistry for detection of thymosin beta 4 alongside CD31, smooth muscle actin andmyosin heavy chainin PFA-fixed human cardiac tissue samples.
Spermatogenic cells isolation v1
Authors: Simón Layla
Published: July 2018

After euthanasia, testicles were obtained, tunica albuginea was removed with sterile forceps,and seminiferous tubules were treated with collagenase for 10 minutes at 37°C (5 mg/ml ofcollagenase, SIGMA C5138). Using a trans-illumination method, cycles of spermatogenesiswere detected. Sections of seminiferous tubules, developing the Golgi-acrosome complexin stages VI to VIII, were selected and cut under stereoscope. The tubules were placed onslides containing 40 μl PBS and extruded with a cover-slip in order to obtain the spermatogeniccells. Spermatogenic cells were fixed and smeared on slides or transferred to microtubes.
Conduction studies of phrenic nerve in healthy children
Authors: Voitenkov V. B. , Komantsev V. N. , Skripchenko N. V. , Ekusheva E. V. , Klimkin A. V. , Aksenova A. I.
Published: July 2018

Background. Unlike parameters of phrenic nerve conduction in healthy adults characterized by stability, in children variations with age are observed. The objective is to investigate the M-wave latency and amplitude in electroneurographic (ENG) examination of the phrenic nerve in healthy children of different ages for development of a normative database of neurophysiological data.

Materials and methods. 48 healthy children (28 girls and 20 boys) were examined. Mean age was 9.19 ± 5.43 years (1–18 years). ENG examination of the phrenic nerve was performed with the modified standard procedure of stimulation at the level of the outer margin of the lower third of the sternocleidomastoid muscle with registration of M-wave from standard diaphragm point and parallel registration of the muscle activity from m.deltoideus and m.serratus anterior.

Results. Mean values of the M-response latency were 5.64 ± 1.25 ms, amplitude – 0.66 ± 0.34 mV. For age-differentiated subgroups 1–2 years (n = 7), 3–5 years (n = 9), 6–12 years (n = 15), and 13–18 years (n = 17), the latency was 4.96 ± 1.94; 5.01 ± 1.13; 5.42 ± 0.84, and 6.44 ± 1.43 ms, respectively; the amplitude was 1.01 ± 0.37; 0.87 ± 0.31; 0.61 ± 0.24, and 0.45 ± 0.21 mV, respectively. The M-response amplitude values in children aged 1–2 years significantly differed from the values in children aged 6–12 and 13–18 years.

Conclusion. ENG examination of the phrenic nerve is a technically uncomplicated procedure, and the obtained data is easy to interpret. During phrenic nerve ENG in children, it is necessary to take age variability of the M-wave latency and amplitude into account. The M-wave amplitude in healthy toddlers (1–2 years old) was significantly lower than in children aged 6–18 years.
MESLEKİ EĞİTİMDE ÖĞRENCİLERİN MOTİVASYONLARININ VE BEKLENTİLERİNİN İNCELENMESİ: HONAZ MESLEK YÜKSEKOKULU’NDA BİR ARAŞTIRMA
Authors: Yeşil Yeliz , Tokbaş Murat
Published: July 2018

Öz

Bu çalışma Honaz
Meslek Yüksekokulu’nda okuyan öğrencilerinin motivasyonlarının ve
beklentilerinin ölçülmesi amacıyla yapılmıştır. Çalışmada Emin ZEYTİNOĞLU’nun
makalesinde kullandığı ölçekten esinlenerek 5’li Likert ölçeğine göre anket
düzenlenmiştir. İstatistiksel analizler, SPSS 20.0 kullanılarak hazırlanmıştır.
Yapılan araştırma sonuçlarına göre öğrencilerin mesleki eğitimde
beklentilerinin ve motivasyonlarının genel olarak yüksek düzeyde olduğu tespit
edilmiştir. Bu durum öğrencilerin günümüzde daha çok bilinçlendiklerini ve ne
istediklerinin daha farkında olduğunu ortaya koymaktadır. Çalışmanın birinci
bölümünde konu ile ilgili giriş yapılmış ve ikinci bölümde motivasyon
kavramına, üçüncü bölümde eğitim kurumlarında öğrenci motivasyonuyla ilgili
literatür taramasına, dördüncü bölümde ise araştırmaya değinilmiştir. En son
bölümde sonuç ve değerlendirme yapılmıştır.
Peculiarities of complaints among young women with idiopathic arterial hypotension
Authors: Baev V. M. , Agafonova T. Yu. , Igumnova O. A.
Published: July 2018

Aim. To study the peculiar features of complaints among young women with idiopathic arterial hypotension (IAH) and determine their frequency.

Materials and methods. Comparative analysis of complaints frequency between two groups of women aged 18–23 was carried out: the test group of patients, suffering from IAH (n = 210) with SAP 97 (92–98) mm Hg and the control group (n = 96) with normal arterial pressure with SAP 123 (121–125) mm Hg.

Results. 58 % of women with IAH walk less than 5 km a day that is reliably more frequently compared to women with normal arterial pressure. Women with IAH, having moderate physical and emotional load, more often have complaints of dyspnea (25 %) and thoracic pains (40 %). When suffering from IAH, patients more often complain of pain in their legs, especially while walking (35 %), dizziness (38 %), pain and paleness of hand and leg fingers in cold (36 %); 12% of women with IAH have nocturia.