bluuebunny/crossref_metadata_2025 huggingface dataset:
IVF and the Anti-Abortion Movement
Authors: Boys Stephanie K. , Harris Evan M.
Published: April 2020

As the anti-abortion movement gains ground in the United States, it is important to explore the potential impact of overturning Roe v. Wade (1973) on the practice of IVF (in vitro fertilization). If the United States Supreme Court abandoned the legal right to early pregnancy terminations, it would open the door for states to enforce laws defining life to begin at conception. In all likelihood, legally establishing life to begin at conception may make IVF far less likely to be successful, significantly more expensive, more likely to result in high risk pregnancies with multiples, and more medically invasive. As the prevalence of IVF grows, this is a practice that should no longer be ignored in the political discourse on abortion. Instead, the unintended consequences of life at conception bills on the cost, availability, safety, and success rates of IVF can provide a strong argument in the toolbox of strategies for social workers lobbying against anti-abortion legislation.
Sustaining Trajectories
Authors: Simmons Lamont D.
Published: April 2020

While the literature is replete with studies on persistence among students across academic majors, few studies examine the nature of persistence among Black males enrolled in baccalaureate social work programs. This qualitative study offers some insight into how a sample of four Black male graduates from an accredited baccalaureate social work program persisted toward degree attainment. Three themes emerged from this study: (a) family encouragement and support, (b) sense of belonging, and (c) presence of Black male professors. Findings suggest the need for social work educators to consider programmatic initiatives acknowledging the role of families in persistence efforts, facilitating connectedness, and recruiting Black male professors or other Black male mentors.
Secondary Traumatic Stress, Burnout, and Compassion Satisfaction Among Child Advocacy Interdisciplinary Team Members
Authors: Staudt Marlys , Williams-Hayes Mona
Published: April 2020

Recent research has examined the stress and indirect trauma experienced by helping professionals who work with survivors of direct trauma, including interpersonal violence. Little of this research has focused on Child Advocacy Center team members. This practice-based survey research addresses that gap. The study examined secondary traumatic stress (STS), burnout, and compassion satisfaction (CS) in interdisciplinary team members (n=36) of one Child Advocacy Center in the southern United States, and explored relationships between CS, STS, and burnout. As assessed by the Secondary Traumatic Stress Scale, 50% of participants experience Post Traumatic Stress Disorder symptoms due to STS. Based on the Professional Quality of Life Scale, burnout was low and CS was high. Those with higher CS had lower burnout and STS. Positive associations were also found between life stresses in the past year as measured by the Social Readjustment Rating Scale and STS and burnout, but not CS. Practitioners, agency supervisors, and administrators need to be aware of the effects of trauma work, regularly assess for these effects, and provide opportunities for support and debriefing. Schools of social work should consider developing and implementing specialized units on STS and self-care.
Making it Work
Authors: Mirick Rebecca G. , Wladkowski Stephanie P.
Published: April 2020

While doctoral education is growing in the United States, attrition from doctoral programs is high; 40-60% of students who begin doctoral programs do not complete them. Previous research has explored reasons for attrition, but little research has examined persistence, and none have looked at persistence for women during and after pregnancy. This qualitative study explored female doctoral students and graduates’ (n=28) attributions of persistence to completion in their professional healthcare doctoral programs (57% social work) after a pregnancy and/or birth. Two primary themes emerged from this study. First, women attributed their persistence in the program to internal resources such as determination, organization, discipline, and the ability to assess needs and shift resources, schedules, plans, or expectations to meet those needs. Second, some women attributed their ability to persist in their program to good luck, in terms of fertility, pregnancy timing, expectations of the student, and family friendly advisors and programs. Dissertation chairs and advisors can use these findings to more effectively support pregnant and parenting students, including helping them build important skills and reflect on implicit messages about caregiving women who are doctoral students.
2020
Authors: Adamek Margaret E.
Published: April 2020

At the dawn of a new decade, I cannot help but recall that when I started my academic career in social work in the 1990s, it was common to look ahead to how life would be in the next century. Statistical projections forecast various demographic changes, often using 2020 as the future time frame. Back then, 2020 sounded far away and almost alien. Well folks, the future is here. Now that 2020 has dawned, it seems that the more things change, the more they stay the same. Certainly, the specific issues that social workers address have changed over the decades, and our approaches have been modified to tackle the new issues, but the struggle to understand and meet emerging needs persists. I used to jokingly hear that the ultimate goal of the social work profession was to put ourselves out of business. Given the intransigence of intolerance for difference and the persistent emergence of needs arising from “advances” of modern living, it seems the social justice stance of our profession will never be fully met. Indeed, our social contract is continually expanding.
In the Fall 2019 issue of Advances in Social Work we are pleased to present 14 papers--11 empirical, 3 conceptual--written by 29 authors from 12 states across the U.S., representing different regions of the country and Ghana. Each paper is briefly introduced below.
Comunicação e intertransponibilidade na mediunidade espírita: ensaio de uma antropologia comunicacional da religião em Geertz
Authors: Signates Luiz
Published: April 2020

Estudo da aplicação da dicotomia dos modelos em Geertz ao estudo da mediunidade espírita no Brasil, dentro de uma abordagem compreensiva da comunicação. Utiliza-se os sistemas culturais e a intertransponibilidade dos “modelos de” e “modelos para”, aplicando-os à concepção e à história da mediunidade espírita no Brasil. Por fim, conclui-se pela maleabilidade da intertransponibilidade, percebida como comunicação intersígnica.
O elemento noticioso e a intertextualidade nos textos cronísticos da coluna Crônicas & Outras Histórias, do jornal O Popular
Authors: Borges Rogerio Pereira
Published: April 2020

A coluna Crônicas & Outras Histórias, do jornal O Popular, de Goiânia, foi durante décadas uma das mais lidas da principal publicação noticiosa do Estado de Goiás. Apesar de não ser visto como um locus necessariamente jornalístico, este espaço abriga textos de diferentes naturezas discursivas, enunciados por autores de variados perfis e que escrevem com propósitos distintos. O presente artigo dedica-se a investigar essas intersecções, buscando identificar como as temáticas jornalísticas invadem as crônicas, sem que estas percam seus contornos literários, promovendo, isto sim, hibridizações e diálogos interessantes e surpreendentes. Para tanto, o escopo da pesquisa centrou-se no ano de 2013, conturbado e pródigo de notícias.
USO DE IMAGENS NO PROCESSO DE COMUNICAÇÃO PARA A SUSTENTABILIDADE: UMA CONSTRUÇÃO EDUCATIVA CONTEMPORÂNEA
Authors: Sousa Silva Francisco Mário de
Published: April 2020

A compreensão conceitual sobre “comunicação para a sustentabilidade” incide em importantes reflexões, acerca de princípios éticos que, envolvem a sustentabilidade e suas interfaces. Nesse contexto, essa pesquisa buscou identificar e avaliar, o uso de imagens motivadoras de reflexões sobre sustentabilidade, no contexto de um município que, integra a Região Metropolitana do Cariri cearense. Como principal instrumento metodológico, utilizou-se “pesquisa de campo” associada a, estudos bibliográficos. Os dados analisados foram obtidos no primeiro semestre de 2019. Identificou-se que, a “comunicação para a sustentabilidade” fomenta mudanças sociais, apontando caminhos educativos para práticas favoráveis ao desenvolvimento. Por fim, destaca-se o necessário aprofundamento em pesquisas que envolvem as interfaces entre comunicação e sustentabilidade, buscando efetivar princípios éticos e ruptura com práticas de degradação.
Editorial
Authors: Fernandes Luiz Carlos do Carmo
Published: April 2020

Comunicação em tempos de ruído

No que depender da ciência, a comunicação viverá momentos de otimismo daqui para frente. O teletransporte de partícula quântica qutrit, anunciado recentemente pela imprensa mundial, permite prever uma melhoria no processamento de computadores e na quantidade de informações enviadas. O que, consequentemente, trará a possibilidade de tornar a comunicação ainda mais segura.
OS LIMITES DA RACIONALIDADE NOS DISCURSOS POLÍTICOS EM REDE SOCIAL DURANTE AS ELEIÇÕES DE 2018 NO BRASIL
Authors: Moraes Ângela Teixeira
Published: April 2020

Este estudo avalia as contribuições teóricas de quatro vertentes ligadas aos estudos da retórica e da argumentação para entender a discussão política travada nas redes sociais durante a eleição presidencial brasileira em 2018: a Retórica Clássica, a Nova Retórica, a Retórica da Incompreensão e a Apologia da Polêmica. A racionalidade prevista pela lógica formal, a justificação das convicções e opiniões e o papel da polêmica na democracia são elementos analisados em uma interação no Facebook escolhida como corpus deste trabalho. A análise teve o objetivo de descrever a natureza dos argumentos manifestados nessa interação verbal. Ideologia e interpretação religiosa emergem como fundamentos insuperáveis do dissenso.
Colecta de antocóridos y determinación de su capacidad depredadora sobre adultos de Frankliniella occidentalis (Pergande) (Thysanoptera, Thripidae)
Authors: Avellaneda Nieto John Alexander , Díaz Tapias Marco Antonio , Acosta Leal Daniel Augusto , Rodríguez Caicedo Daniel , Cantor Rincón Fernando
Published: April 2020

El trips Frankliniella occidentalis, actualmente es  la plaga cuarentenarias más importantes en cultivos de flores de la sabana de Bogotá, en Colombia es la especie que registra más interceptaciones, lo que causa grandes pérdidas económicas, por esto, es importante encontrar estrategias de manejo de esta plaga, como lo es control biológico. Los antocóridos del genero Orius son reconocidos agentes de control biológico los cuales depredan trips  F. occidentalis. Este estudio tuvo como objetivo, colectar e identificar antocóridos presentes naturalmente en seis fincas floricultoras de la sabana de Bogotá y determinar su capacidad depredadora sobre adultos de F. occidentalis. Se realizaron muestreos en seis fincas floricultoras ubicadas en la sábana de Bogotá. En cada finca, se realizó el muestreo en la flora circundante a los invernaderos. Simultáneamente se evaluaron cuatro métodos de muestreo: sacudida del follaje, jameo, golpeteo y caída. Los individuos de las especies colectadas fueron identificados taxonómicamente y se estableció un pie de cría de cada una, para realizar el ensayo de capacidad de depredación. De 394 individuos colectados el 75% correspondió a O. insidiosus, 24% a O. pumilio y 1% a una especie de antocórido que no pertenecía al género Orius. El método de colecta más exitoso fue el de golpeteo, con 67% de las capturas, seguido por el de jameo con 33%. No se capturaron individuos con los otros métodos. La especie O. insidiosus consumió en promedio 23 individuos adultos de F. occidentalis en 24 horas, siendo significativamente mayor al consumo encontrado para las otras dos especies.
Thermodynamic Study of the Solubility of Naproxen in Some 2-Propanol + Water Mixtures
Authors: Caviedes Rubio Diego Iván , Rodríguez Rodríguez Gerson Andrés , Delgado Daniel Ricardo
Published: April 2020

The equilibrium solubilities of the anti-inflammatory drug naproxen (NPX) in 2-propanol + water mixtures were determined at several temperatures from 298.15 to 313.15 K. The Gibbs energy, enthalpy, and entropy of solution and of mixing were obtained from these solubility data. The solubility was maximal in φ1 = 0.90 and very low in pure water at all the temperatures studied. A non-linear plot of ∆solnH° vs. ∆solnG° with negative slope from pure water up to 0.20 in volume fraction of 2-propanol and positive beyond this composition up pure 2-propanol was obtained at the mean temperature, 305.55 K. Accordingly, the driving mechanism for NPX solubility in the water-rich mixtures was the entropy, probably due to water-structure loss around non-polar moieties of the drug and for the 2-propanol-rich mixtures it was the enthalpy, probably due to its better solvation of the drug.
Coeficientes de partición de mercurio en lixiviados del relleno sanitario La Esmeralda
Authors: Ocampo Barrero María Fanny , Londoño Carvajal Adela , Giraldo Gómez Gloria Inés , Sanabria González Nancy Rocío
Published: April 2020

Se determinó el coeficiente de partición (Kd) de mercurio (Hg) en cinco muestras de lixiviado provenientes del relleno sanitario La Esmeralda, de la ciudad de Manizales (Caldas – Colombia). La concentración de mercurio se cuantificó empleando espectroscopia de absorción atómica de vapor frío. Dada la elevada cantidad de materia orgánica presente en los lixiviados y las interferencias por efectos de la matriz, se empleó el método de adición de estándares para validar la metodología usada en la cuantificación de mercurio. El coeficiente de partición de mercurio en los lixiviados entre 222.4 y 3460.2 L/kg confirma la composición variable de los mismos, dado el amplio intervalo encontrado en la concentración de Hg total (71.4 – 1336.8 µg/L) y sólidos suspendidos (442 – 1310 mg/L). Valores de log Kd entre 2.35 y 2.84 se asocian a muestras de lixiviado en las cuales el Hg tiende a estar disuelto, en tanto que valores de log Kd entre 3.41 y 3.54 indican mayor afinidad del Hg a adsorberse sobre los sólidos suspendidos. Cuando el pH del lixiviado disminuye a 6, se modifica la distribución de las especies de mercurio en las dos fases, aumentando la concentración de mercurio disuelto (Kd disminuye). A pH superior a 8, la relación de la concentración de Hg adsorbido y disuelto permanece constante (Kd no varía).
Levante de carpa común (Cyprinus carpio) en sistemas cerrados de recirculación bajo condiciones de laboratorio
Authors: Carrascal R Jesús , Torres-Mesa Ana , Hurtado-Giraldo Hernán , Gómez-Ramírez Edwin
Published: April 2020

La acuicultura es una industria de gran crecimiento en busca de sistemas más amigables con el ambiente. La producción de carpa común mundialmente se presenta principalmente en China, lo que ha permitido que sea la especie de mayor producción. Por lo tanto evaluar sistemas donde el recurso del agua sea mejor aprovechado es de gran importancia. Se evaluó el crecimiento y parámetros productivos de Cyprinus carpio en sistemas cerrados de recirculación (SCR). Para esto se realizaron dos experimentos (M1 y M2) con 5 SCR donde se mantuvieron los peces por un periodo de 12 semanas de cultivo cada uno. En cada SCR se cultivaron 100 alevinos. Las variables evaluadas fueron peso, longitud estándar y longitud total, y se calcularon parámetros productivos. Se hizo el seguimiento y control de los parámetros físico-químicos del agua. De acuerdo a lo observado los peces de M1 alcanzaron un peso promedio de 6.13 ± 0.80 g, longitud estándar 5.66 ± 0.24 cm y longitud total  7.08 ± 0.23 cm mientras en M2 alcanzaron un peso de 10.22 ± 0.89 g, longitud estándar 6.62 ± 0.18 cm y longitud total 8.2 ± 0.22 cm. El mejor crecimiento en M2 se relacionó con valores de parámetros fisicoquímicos dentro del rango adecuado para la especie. El crecimiento en peso y en longitud se ajustó al modelo exponencial  en M1 y M2. En conclusión puede decirse que el cultivo inicial de alevinos de carpa en SCR permite buenos crecimientos y supervivencia empleando poca agua y bajo condiciones altamente controladas.
Distribución y conservación de dos especies de orquídeas en el departamento del Meta, Colombia
Authors: Hernández Castañeda Oscar Iban , Bonilla Morales Miguel Macgayver , Cárdenas Julián F.
Published: April 2020

En Colombia existen alrededor de 4.270 especies de orquídeas distribuidas en ambientes que van desde los páramos hasta desiertos. En este país, Prosthechea vespa y Encyclia cordigera presentan usos en colecciones personales, para decorar jardines y exposiciones nacionales o internacionales, aunque, por sus relaciones ecosistémicas estas especies son importantes en ambientes naturales. Por tal motivo, la presente investigación tuvo como objetivo establecer la distribución y aspectos relacionados con la conservación de P. vespa y E. cordigera en el departamento del Meta. De esta manera, se revisó material de herbario, literatura científica y salidas de campo para la conformación de la base de datos y análisis de la información espacial con DIVA-GIS®, incluyendo mapas de distribución y áreas protegidas. Simultáneamente, se colectaron frutos nativos para su propagación in vitro. La distribución de las especies se registra en las bioregiones del piedemonte en un rango de 400 a 1000 msnm en los municipios de Villavicencio, Restrepo y Cumaral asociadas a bosques húmedos y secos. La germinación in vitro de E. cordigera fue entre 20-24 semanas y la de P. vespa fue a las 10 semanas, pero el proceso de organogénesis se presentó sólo en E. cordigera catalogando este método como estrategia de conservación de germoplasma ex situ. De esta manera sólo se pudo generar protocolos para la multiplicación in vitro de E. cordigera. Además, ambas especies poseen una distribución limitada y pocos datos de ocurrencia, por lo que el piedemonte metense puede ser considerado como zona de conservación.
Aplicaciones de técnicas espectroscópicas para el análisis de suelos
Authors: Rodríguez P Wilson , García R. Paola A. , Fajardo O. Alberto
Published: April 2020

Existe una gran diversidad de técnicas analíticas en el estudio de suelos, siendo las técnicas espectroscópicas las que mayor auge han tenido recientemente ante la necesidad de buscar metodologías que permitan estudiar adecuadamente grandes extensiones de tierra y que sean amigables con el ambiente. Por esto es necesario revisar dentro de las actuales técnicas espectroscópicas usadas en análisis de suelos cual sería la técnica más adecuada para incorporar en los servicios de extensión en suelos en Colombia bajo los lineamientos dados anteriormente. La espectroscopía infrarrojo es la técnica más pertinente para incorporar en los análisis de fertilidad de suelos en Colombia considerando su versatilidad, bajo costo y reproducibilidad. Asociando los datos de IR con el uso de análisis quimiométrico se pueden lograr estimaciones de parámetros edáficos con alto grado de certeza, con lo cual se genera una nueva estrategia de trabajo en laboratorio ambientalmente más amigable.
Estimación de la incertidumbre en la estandarización de una solución de ácido sulfúrico
Authors: Giraldo Gómez Gloria Inés , Ramírez Ramírez Diógenes de Jesús , Sanabria González Nancy Rocío
Published: April 2020

Se estimó la incertidumbre de medición en la concentración de una solución de ácido sulfúrico (H2SO4) estandarizada con un patrón primario de carbonato de sodio anhidro (Na2CO3), mediante un ejemplo sencillo de procesamiento de los datos experimentales obtenidos en el laboratorio. La metodología empleada se basó en la guía establecida por la EURACHEM/CITAC e incluyó las siguientes etapas: identificación de las fuentes de incertidumbre, evaluación de la incertidumbre estándar y cálculo de la incertidumbre estándar combinada e incertidumbre expandida. Las fuentes que presentaron mayor contribución a la incertidumbre fueron la reproducibilidad y la repetibilidad provenientes de la medición del volumen de H2SO4 gastado en la valoración del Na2CO3. Bajo las condiciones de estudio, la incertidumbre en la estandarización de una solución de H2SO4 de concentración 0.0127 mol/L fue ± 0.0015 mol/L.
Optimización del protocolo para la extracción y la cuantificación de proteínas totales en semillas germinadas de maíz (Zea mays L.)
Authors: Correa Navarro Yaned Milena , Buriticá Salazar Laura María , Rivera Giraldo Juan David , Penagos González Juan Pablo , Torres Osorio Javier Ignacio
Published: April 2020

El maíz (Zea mays L.) es el cereal de mayor cultivo a nivel mundial, del cual se pueden obtener para consumo humano, harina, fibra, aceite y proteínas; de estas últimas se han aislado diferentes tipos tales como albúminas, globulinas, prolaminas y gluteninas; sin embargo, dada la variedad de estas biomoléculas, su obtención no ha sido fácil. Este trabajo se realizó para determinar el mejor método para la extracción y la cuantificación de las proteínas totales en semillas germinadas de maíz (Zea mays L.), para lo cual se compararon seis protocolos de extracción que resultaron al combinar dos métodos físicos convencionales: agitación orbital o asistida con ultrasonido, y tres solventes de extracción: ácido tricloroacético, Tris-Base y Tris-HCl. Previamente se eligió el mejor método de cuantificación por espectroscopía de ultravioleta visible empleando los reactivos cromogénicos de: Lowry, Bio-Rad y Bradford. Los mejores resultados (10,83 mg/l de proteína) se obtuvieron con la extracción asistida con ultrasonido en combinación con Tris-Base y empleando el reactivo de Bradford para la generación del color y la posterior cuantificación por espectroscopía de ultravioleta-visible.
Çalışma Mutluluğu Düzeyi ve Algısı: Özel Sektör Avukatları Üzerine Bir Araştırma
Authors: Turan Nuray
Published: April 2020

Bu çalışmanın amacı, özel sektör avukatları arasında çalışma mutluluğunu ölçmek, çalışma mutluluğunu nasıl ifade ettiklerini ve algıladıklarını ortaya koymaktadır. Bu amaçla, 168 özel sektör avukatının katıldığı bir karma araştırma yöntemi tasarlanmıştır. Avukatların genel çalışma mutluluğu ortalamasının 5’li likert ölçeğine göre 3,07 ile ortalama düzeyde olduğu görülmüştür. Avukatlar çalışma mutluluğunu “potansiyeli gerçekleştirme, çalışma ortamı koşulları, huzur, işi severek yapma, para/gelir/ücret” olarak ifade etmektedir. Çalışma mutluluğunu gelir/para/ücret ile ifade eden avukatların genel çalışma mutluluğu 3,24 ortalama ile diğerlerine göre en yüksek ortalamaya sahiptir. Çalışma mutluluğunu “potansiyeli gerçekleştirme” ile ifade eden avukatların olumlu duyguları “huzur” ile ifade eden avukatlardan; “huzur ve para/ücret/gelir” ile ifade eden avukatların ise; “işini severek yapma” ile ifade eden avukatlardan daha yüksektir.
Öğretmenlerin Algıladıkları Örgütsel Desteğin Örgütsel Sonuçları Üzerindeki Etkisi: Bir Meta-Analiz Çalışması
Authors: Kasalak Gamze
Published: April 2020

Bu araştırmanın amacı, öğretmenlerin algıladıkları örgütsel desteğin örgütsel sonuçlar üzerindeki etkisini belirten araştırmaların etki büyüklüklerini ortaya koymak ve elde edilecek etki büyüklüğünün; örneklem bölgesi ve eğitim kademesi moderatör değişkenlerine göre farklılık gösterip göstermediğini meta-analiz yöntemiyle araştırmaktır. Bu araştırmalardan öğretmenlerin algıladıkları örgütsel desteğin örgütsel sonuçlarına etkisine ilişkin ve kodlama stratejisi uygun verileri kapsayan 23 araştırma bu araştırmaya dâhil edilmiştir. Araştırma sonuçları, öğretmenlerin algıladığı örgütsel desteğin örgüt-iş uyumu sonuçlarını yüksek düzeyde ve pozitif yönde; davranışsal ve öznel iyi oluş sonuçlarını zayıf düzeyde ve pozitif yönde etkilediğini göstermiştir. Örneklem bölgesi ve öğretim kademesi değişkenleri öğretmenlerin algıladıkları örgütsel desteğin örgütsel sonuçları üzerindeki etkisinde moderatör değişkenler olarak anlamlı değildir.
Workplace Fun: A Management Tool for Employee Engagement?
Authors: Bilginoğlu Elif , Yozgat Uğur
Published: April 2020

This paper offers a review of contemporary debates on organic and managed workplace fun initiatives. The managed workplace fun initiatives are named by some scholars and practitioners as a management tool for employee engagement. This paper discusses the workplace fun phenomenon and investigates the most frequently used workplace fun practices and the fun practices which are believed to be the most effective ones. Furthermore, it examines whether the workplace fun activities are regarded as a management tool through a literature review and a quantitative research. For the research 388 Turkish private bank employees who work for the headquarters of these banks are surveyed using convenient sampling method. The findings of the study highlight not only the most frequently used workplace fun practices like recognition of personal milestones, community volunteerism engagement opportunities, entertainment and games, but also the fun practices which are believed to be the most effective ones like stress release activities, recognition of personal milestones, fun social events and community volunteerism engagement opportunities among the others. The responses also revealed that the workplace fun initiatives are not regarded as a management tool by the employees and/or a sanction of the management on them. Furthermore, the findings provide evidence that there are significant negative correlations between effectiveness of the fun activities and usage of them as a management tool or a sanction of management on them.
Kalıp yargıların girişimcilik niyetine etkisi
Authors: Kalafatoğlu Yaprak
Published: April 2020

Bu çalışmada, kalıp yargıların, cinsiyetin ve yakın çevredeki kadın girişimcilerin, öğrencilerin girişimcilik niyetlerine etkisi incelenmiş ve girişimcilikte önemli bulunan özellikler araştırılmıştır. Çalışmaya, kolayda örneklem yoluyla ulaşılan 123 üniversite öğrencisi katılmıştır. Anket, girişimciliği tanımlarken kullanılan özellikler, kalıp yargı müdahalesi, girişimcilik niyeti ölçeği ve demografik bilgi bölümünden oluşmaktadır. Değişkenler arası ilişkiler t-testi, çift yönlü varyans analizi ve Mann Whitney U testi ile ölçülmüştür. Bulgular, kalıp yargıların sıfırlandığı koşulda, girişimcilik niyetinin kadın ve erkekler arasında fark oluşturmadığını göstermiştir. Erkeksi kalıp yargılar verilen kadınların ise girişimcilik niyeti tahmin edilenin aksine artmıştır. Bununla birlikte, girişimcilikte önemsenen özelliklerin cinsiyetler arasında farklılaştığı tespit edilmiştir. Sonuçlar toplumsal cinsiyet bağlamında tartışılmış, araştırmacılara ve uygulamacılara öneriler sunulmuştur.
İşyerinde Yalnızlığı Etkileyen Örgütsel Güven Unsurlarının Cinsiyete Göre Değişimi: Havalimanı Çalışanları Üzerine Bir Araştırma
Authors: Özmen Mehmet
Published: April 2020

Bu çalışmanın amacı örgütsel güven ile işyerinde yalnızlık arasındaki ilişkilerin araştırılmasıdır. Ayrıca örgütsel güven değişkenlerinin, işyerinde yalnızlık değişkenlerine olan etkisinin cinsiyete göre nasıl farklılaştığı, çalışmanın özgün katkısını oluşturmuştur. Isparta ve Denizli’deki havalimanlarında çalışan 256 kişiye anket uygulanarak toplanan veriler fark testi, korelasyon ve yol analizine tabi tutulmuştur. Araştırma bulgularına göre kadınların erkeklere göre işyerinde daha çok yalnızlık yaşadıkları tespit edilmiştir. Dürüstlük ve güvenilirliğin örgüte bağlılığı arttırdığı ve bağlılığın da işyerinde duygusal ve sosyal yalnızlığı azalttığı belirlenmiştir. Örgüte bağlılıkta erkeklerde güvenilirliğin, kadınlarda ise dürüstlüğün etkisinin fazla olduğu sonucuna ulaşılmıştır. Örgüte bağlılığın, erkeklerde duygusal ve sosyal arkadaşlık yoksunluğu azaltırken, kadınlarda sadece sosyal arkadaşlık yoksunluğunu azalttığı görülmüştür.
Yüksek Performanslı İnsan Kaynakları Uygulamaları Hizmet Odaklı Örgütsel Vatandaşlık Davranışını Nasıl Etkiler? İş Tutumlarının Aracılık Rolü
Authors: Gürlek Mert
Published: April 2020

Bu araştırma yüksek performanslı insan kaynakları uygulamalarının nasıl hizmet odaklı örgütsel vatandaşlık davranışını etkilediğini ortaya çıkarmayı amaçlamaktadır. Araştırma modeli yapısal eşitlik modellemesi kullanılarak test edilmiştir. İlişkilerin test edilmesinde kullanılan veri dört ve beş yıldızlı otel işletmelerinin işgörenlerinden (n=496) elde edilmiştir. Bulgular temel olarak yüksek performanslı insan kaynakları uygulamalarının hizmet odaklı örgütsel vatandaşlık davranışı üzerindeki etkisinde işe adanmanın ve işe gömülmüşlüğün tam aracılık rollerine işaret etmektedir. Bu bulguya göre, bir biriyle uyumlu insan kaynakları uygulamaları işe adanmayı ve işe gömülmüşlüğü artırmak suretiyle hizmet odaklı örgütsel vatandaşlık davranışını artırmaktadır. Bir başka ifadeyle, işe adanma ve işe gömülmüşlük bağımsız ve bağımlı değişken arasındaki ilişkide kilit bağlantı noktalarını oluşturmaktadır. Sonuç olarak bu araştırma, yüksek performanslı insan kaynakları uygulamaları ve hizmet odaklı örgütsel vatandaşlık davranışı arasındaki ilişki süreçlerine ışık tutarak, alanyazına katkı sağlamaktadır.
Effect of Curing Temperature in the Alkali-Activated Brick Waste and Glass Powder mortar and Their Influence of Mechanical resistances
Authors: El Abidine Rahmouni Zine , Tebbal Nadia , Yamina Omri Imen
Published: April 2020

In this study, compressive strength values were measured at different curing times(7,14 and 28 days).The alkali-activation of the brick and glass powder body with potassium water glass having a silicate modulus of 3. Compressive strengths, flexural strength and specific fracture energy of the specimens stored at 40° C and 60° C are evaluated at 28-days. The study demonstrates that the storage temperature of specimens and the content of the alkaline solution have a significant influence on all mechanical properties of the studied materials.
Keywords: brick waste, glass powder, curing temperature, alkali-activated.
Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites
Authors: Korniejenko Kinga , Mucsi Gábor , Papné Halyag Nóra , Szabó Roland , Mierzwiński Dariusz , Louda Petr
Published: April 2020

This article analyses the influence of a short basalt fibre admixture on the mechanical properties of geopolymers, especially compressive strength. This preliminary research is the first step towards the development of a composite for fire resistant applications in civil engineering. This study investigates the behaviour of a fly ash based geopolymer containing basalt fibres. Fly ash from the coal power plant ‘Skawina’ (located in: Skawina, Lesser Poland, Poland) was used as the raw material. The chemical composition of this fly ash is typical for class F. Three series of fly ash based geopolymers were cast. In the first, short basalt fibres were added as 1% by weight of fly ash, in the second short basalt fibres were added as 2% by weight of fly ash and the third functioned as a control series without any fibres. Each series of samples were tested on compressive strength after 28, 14 and 7 days, and specimen density was determined. Additionally, microstructural analysis was carried out after 28 days. The results show that the addition of basalt fibres can improve the mechanical properties of geopolymer composites.
Keywords: geopolymer, basalt fibre, composites, fire resistance
Modification of AA Binder Matrix with the Use of PP Fibres – Strength Investigations
Authors: Dawczyński Szymon , Stokłosa Anna
Published: April 2020

The alkali-activated (AA) binders are assumed to be more ecological than ordinary Portland cement (OPC) binders, because of lower energy requisition and lower CO2 emissions during the production processes. The purpose of using polypropylene(PP) fibres in traditional concrete, geopolymers and mortars is to improve strength properties by inhibiting the growth of cracks that usually occur due to shrinkage, as well as improving the mechanical properties. This paper presents laboratory research into the fibre reinforcement impact on the strength properties of an AA binder made of fly ash suspension. In addition to the suspension, which is a waste product from the coal power plant, recycled ground glass and metakaolin were used as the precursors. The chemical activator of the geopolimerisation reaction was prepared using sodium hydroxide and sodium silicate. Five different sets of the prism samples 40x40x160 mm were made (with different PP fibres ratio,  from 0% to 2%  by weight) and then the flexural and compressive strength tests were performed.  The addition of polypropylene fibres increased the bending strength, which produced the beneficial effect of reducing crack propagation in cases of tensile stress occurrence.
Keywords: alkali-activated binders, geopolymers, polypropylene fibres, fly ash suspension, bending strength
The Use of Iron Ore Tailings in the Iron Quadrangle of Minas Gerais, Brazil
Authors: Rodrigues Moacyr , Vogt Jordanna , Lima Lílian , Duarte Glaucia , Freire Carolina , Lameiras Fernando
Published: April 2020

The Iron Quadrangle of Minas Gerais comprises 7,000 km2 and accounts for about 60% of Brazil’s iron ore production. The rocks explored in this region are banded iron formations. The processing of this rock to produce the iron ore concentrate generates large quantities of tailings that were being stored in dams. After the ruptures of the dams in 2015 (Mariana–MG) and 2019 (Brumadinho–MG), dam storage became very difficult. Other storage destinations for tailings are now being considered, including dry storage in piles and the use of tailings as a raw material for other manufacturing chains, such as civil construction and road paving. Due to the fine particle size of the tailings, the use of Portland cement to manufacture products for civil construction is limited. However, alkali-activated cement should play an important role, due to their ability to incorporate fine grained materials. Although alkali activated mortars made with the tailings have good characteristics, their cost is very high, especially when sodium silicate prices are elevated. In this study, sodium silicate synthesis from the tailings, alternative calcined clays, the use of the overburden and other aluminosilicate sources are being investigated with a view to reducing the manufacturing cost.
Keywords: Iron ore tailings, Alkali-activated, Building Materials
Study of the leaching alterability in Soxhlet Extractor of ceramic materials with incorporation of ashes resulting from the incineration of urban solid waste
Authors: Galhano Carlos , Elias João
Published: April 2020

Population expansion, especially in metropolitan areas, has led to an increase in the production of urban solid waste (USW) by domestic and commercial activity in urban centres. Reducing the production of these wastes is an extremely difficult task. However, the reduction processes, themselves, have the potential to produce a number of useful residues. This study focuses on the residues of incinerated USW, which produces ashes of varying compositions. This study investigates a mixture of two ashes, one resulting from the incineration of USW from LIPOR II (Intermunicipal Waste Management Service of Porto Region) and another from ValorSul (Valorisation and Treatment of Solid Waste of Lisbon and West Regions), both processed by EcoInCer (Ecological Innovations Ceramics company). Ashes from several samples of USW incorporating clays were tested to identify physical and mechanical characterisations, with a view to identifying useful ecological ceramic materials which could be  used  by the ceramics industry. Ceramic samples with 0%, 10% and 20% of ashes were incorporated in a clay matrix composed of 5% kaolin and 95% red clay, and submitted to leaching alterability in Soxhlet Extractor. The obtained results demonstrate the ways in which the ash percentage and the firing temperature can be important in the alterability of a ceramic material.
Keywords: Ceramic materials, Leaching, Urban solid waste
Graphene Oxide-Ionic Liquid Used As Solid-Phase Microextraction Coating For Polyphenolic Compounds' Extraction And Determination With GC-MS After On-Fiber Derivatization In Wine
Authors: TASHAKKORİ Paniz , ALTINIŞIK TAĞAÇ Aylin , MERDİVAN Melek
Published: April 2020

We describe the use of a home-made fiber coated by graphene oxide modified by an ionic liquid having methylimidazolium cation with an amino-functional group for the extraction of polyphenolic compounds (P.C.s). We then performed the determination by gas chromatography coupled with mass spectrometry after on-fiber derivatization. The authors optimized the main parameters influencing the extraction and derivatization processes. The on-fiber derivatization was employed within 15 min at 60 ºC using 20 µL of trimethylsilyl reagents. Under the optimized conditions, the calibration curves for 12 P.C.s were linear from 0.1 to 1000 µg/L, and the detection limits were between 0.02 and 0.1 µg/L. We determined the single fiber repeatability obtained for all calibration points and the fiber to fiber reproducibility for 100 µg/L to be < 14.82% and < 5.87%, respectively. The extraction efficacy of the home-made fiber due to high intermolecular and electrostatic attractions was much better than the commercial fibers. We successfully applied the method to the analysis of P.C.s in wine samples with the recoveries from 72.8 to 99.9%.
Editorial
Authors: Castañeda Castañeda Jimmy
Published: April 2020

Estimados amigos:Acabamos de vivir uno de los eventos más importantes de la Federación Colombiana de Asociaciones de Obstetricia y Ginecología (Fecolsog), en su historia de más de 50 años, al realizar el XXVI Congreso Nacional de Ginecología junto con el V Congreso Mundial de Medicina Perinatal, D.C., y el VII Congreso Iberoamericano de Diagnóstico y Tratamiento Prenatal, en la ciudad de Cartagena del 28 al 31 de mayo pasados. En este gran evento logramos la participación de más de 3.200 médicos -la inmensa mayoría ginecoobstetras, siendo el evento de nuestra especialidad de mayor asistencia y complejidad académica y organizativa, realizado en el país.
Concordancia entre la estimación visual y la medición del volumen recolectado en una bolsa del sangrado intraparto en mujeres con parto normal en Bogotá, Colombia, 2006
Authors: Rubio-Romero Jorge A. , Gaitán-Duarte Hernando G. , Rodríguez-Malagón Nelcy
Published: April 2020

Objetivos: establecer la concordancia entre la estimación visual y la medición del volumen recolectado en una bolsa del sangrado intraparto, según las características del personal encargado de la atención del parto en un hospital universitario de mediana complejidad y la correlación entre el volumen recolectado y el cambio en la hemoglobina y el hematocrito posparto.Materiales y métodos: se realizó un estudio de concordancia en una cohorte de 168 embarazadas atendidas por parto normal, en un hospital general de nivel medio de complejidad ubicado en Bogotá, Colombia. Se evaluó la concordancia por observadores simultáneos de niveles crecientes de formación y experiencia, mediante el coeficiente de correlación concordancia (CCC Lin), límites de acuerdo del 95% y la correlación entre el cambio en la hemoglobina y hematocrito con el volumen recolectado mediante el coeficiente de Pearson.Resultados: la mediana del volumen recolectado fue 494 mL (p5 = 110, p95 = 1.320), la de la caída del hematocrito de 3,8% y de hemoglobina de 1,2 g/dL. La concordancia global fue aceptable [CCC = 0,72 IC 95%: 0,67-0,76)] con una subestimación visual media de 110,2 mL (límites de acuerdo 95% = -562,1 mL y 341,8 mL). La subestimación y la pérdida de la confiabilidad fueron crecientes a mayor volumen recolectado para todas las categorías de evaluadores. La correlación entre volumen recolectado y el cambio en hemoglobina y hematocrito fue 0,55 y 0,53.Conclusiones: la confiabilidad de la estimación visual es aceptable para volúmenes pequeños y disminuye al aumentar el volumen recolectado. Se deben introducir instrumentos y educación continuada que permitan mejorar la confiabilidad de la estimación del sangrado intraparto para prevenir la hemorragia posparto.
Secuencia de perfusión arterial inversa gemelar. Revisión de la literatura
Authors: Sepúlveda-Agudelo Janer
Published: April 2020

Objetivo: se hace una revisión de la fisiopatología, clasificación, diagnóstico y tratamiento de la secuencia de perfusión arterial inversa gemelar.Metodología: se realiza una búsqueda en la base de datos de Medline y Ovid de la literatura publicada en idioma inglés desde el año 1981 hasta el año 2007 haciendo énfasis en el diagnóstico y el tratamiento de esta patología usando resúmenes para su análisis.Resultados: el diagnóstico prenatal es realizado por ecografía básica, desde la semana 11 de gestación, el doppler y la ecocardiografía son exámenes complementarios y tienen mayor utilización para el seguimiento. Múltiples tratamientos han sido propuestos, desde el manejo expectante y métodos no invasivos hasta métodos invasivos.Conclusiones: el diagnóstico y el tratamiento temprano permiten una mayor supervivencia fetal del gemelo sano; la escogencia del tratamiento que se va a seguir depende del conocimiento y experiencia del médico tratante.
Corioangioma placentario. Reporte de caso y revisión de la literatura
Authors: Sarmiento-Rodríguez Andrés , Quijano-García Fabio Ernesto , Puccini-Santamaría Giuliana , Rodríguez-Acosta Nadiezhda , Victoria-Gómez Pablo Andrés
Published: April 2020

Objetivo: reportar el caso de un corioangioma placentario, diagnosticado y seguido en nuestra unidad y el cual presentó repercusiones hemodinámicas fetales fatales. Se practica revisión de las opciones diagnósticas y terapéuticas para el manejo de este tipo de tumores.Presentación del caso: damos a conocer el caso de un corioangioma placentario diagnosticado a las 20 semanas de embarazo, el cual fue seguido mediante diferentes técnicas imagenológicas y que llevó a un cuadro de anemia y muerte fetal in útero posterior a procedimiento fetoscópico.Discusión: el corioangioma es el tumor placentario más común, diagnosticable hasta en el 1% de todos los embarazos. Su presencia habitualmente no altera el pronóstico perinatal, sin embargo, corioangiomas mayores de 4-5 cm, si bien tienen una frecuencia de presentación mucho menor, guardan un reservado pronóstico perinatal llevando a cuadros de anemia y falla cardiaca fetal de alto gasto.Dentro de las opciones de manejo se encuentran la vigilancia y transfusión fetal in útero así como procedimientos invasivos guiados por ecografía o fetoscopia.Conclusiones: los grandes corioangiomas, aun cuando son infrecuentes, pueden llevar a complicaciones serias tanto maternas como fetales. Aún no existe consenso acerca de cuál es la aproximación terapéutica más adecuada para el manejo de este tipo de tumores.
A Model of the Universe in Kathmandu's Old Royal Palace
Authors: Bühnemann Gudrun
Published: April 2020

This paper discusses a model of the universe found in Mohan courtyard of the old royal palace of Kathmandu, the Hanumānḍhokā. It was commissioned and installed by King Pratāpa Malla in 1656 CE.  The artifact is referred to as “earth-ball” or terrestrial globe (bhūgola) in an inscription and is based on Purāṇic concepts of the universe. An eighteenth-century ritual text indicates that it was an object of worship in the courtyard.
Práxis e palavra: diálogo entre Freire e Kosik
Authors: Dickmann Ivo , Pereira Jean Marcos
Published: April 2020

O presente estudo busca contribuir para a compreensão da Práxis e da Palavra no campo da educação e da formação de professores, tendo como base o pensamento de Paulo Freire e Karel Kosik. Tendo por base a obra Pedagogia do Oprimido, são apontadas contribuições de Freire pertinentes à práxis, estabelecendo um diálogo com a obra Dialética do Concreto de Kosik, que tanto influenciou Freire nesse conceito. Considera-se que o educador necessita, pela natureza do seu trabalho, vivenciar uma formação de natureza científica, artística, ética, estética e técnica, portanto, atividades de teoria e prática. Ao final, apresentam-se considerações indicativas sobre a articulação da práxis com a formação de professores e a produção de conhecimento engajado para a formação integral dos seres humanos em vista do mercado e da cidadania.Palavras-chave: Práxis. Palavra. Formação de professores.Praxis and word: dialogue between Freire and KosikABSTRACTThe present study seeks to contribute to the understanding of praxis and “word” in the field of education and teachers’ training, based on the thoughts of Paulo Freire and Karel Kosik. Based on the work Pedagogy of the Oppressed, Freire’s contributions pertinent to praxis are pointed out, establishing a dialogue with Kosik’s Dialetics of the Concrete, which influenced Freire so much in this concept. It is considered that the educator needs, by the nature of his work, to experience a training of a scientific, artistic, ethical, aesthetic and technical nature, therefore, activities of theory and practice. In the end, we present indicative considerations on the articulation of praxis with the teachers’ training and the production of knowledge engaged in the formation of human beings in view of the market and citizenship.Keywords: Praxis. Word. Teachers’ training.Praxis y palabra: diálogo entre Freire y KosikRESUMENEste estudio tiene como objetivo contribuir a la comprensión de Praxis y Palabra en el campo de la educación y la formación docente, basada en el pensamiento de Paulo Freire y Karel Kosik. Sobre la base de la Pedagogía del oprimido, se destacan las contribuciones de Freire pertinentes a la praxis, estableciendo un diálogo con el trabajo Dialéctica del Concreto de Kosik, que influyó tanto en Freire en este concepto. Se considera que el educador necesita, por la naturaleza de su trabajo, experimentar una formación de índole científica, artística, ética, estética y técnica, por lo tanto, actividades de teoría y práctica. Al final, presentamos consideraciones indicativas sobre la articulación de la praxis con la formación de docentes y la producción de conocimiento comprometido en la formación integral de los seres humanos en vista del mercado y de la ciudadanía.Palabras clave: Praxis. Palabra. Formación de profesores.
Water Poverty Assessment in Olorunsogo Local Government Area of Oyo State, Nigeria
Authors: Ifabiyi P. I. , Oladele B. , Salau Wahab
Published: April 2020

Poor access to water is often linked to poverty, human welfare, health, nutritional status, and household labour. This paper is aimed at contributing to the debate surrounding water poverty in the rural areas. Primary data obtained covering water resources, access, capacity, uses, and environment were collected using closed-ended questionnaires. Altogether, 370 household heads were sampled and were selected by systematic random sampling technique.  Multiple correlations, factor analysis and multiple regression methods were used to determine the level of relationship between the Water Poverty Index (WPI) components. The results revealed that: WPI is the highest in Elenke/Sagbo (72.3%) and the lowest in Onigbeti II/Sagbon (55.5%). Also, WPI has a strong positive relationship with resources (r = .656), capacity (r = .705) and environment at 95%. Percentages of explanations of WPI ranges from 86.45% in Onigbeti I to 50.99% in Aboke.The results of multiple regression between WPI and components showed that components were   weak predictors in 5 wards (Onigbeti III &IV, Onigbeti II , Onigbeti I, Seriki Agbele Aboke and  Abogun wards). The paper posits that access to water in Olorunsogo Local Government Area (LGA) is generally reasonable. The paper suggests stronger government presence to improve and sustain the level of access.

Keywords : Water Poverty; Access; Capacity; Uses; Environment; Resources; Factor Analysis

 

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