bluuebunny/crossref_metadata_2025 huggingface dataset:
God's Country in Black and Blue: How Christian Nationalism Shapes Americans' Views about Police (Mis)treatment of Blacks
Authors: Perry Samuel , Whitehead Andrew L , Davis Joshua
Published: July 2018

Research shows that Americans who hold strongly to a myth about America’s Christian heritage―what we call “Christian nationalism”―tend to draw rigid boundaries around ethnic and national group membership. Incorporating theories connecting ethnic boundaries, prejudice, and perceived threat with a tendency to justify harsher penalties, bias, or excessive force against racial minorities, we examine how Christian nationalist ideology shapes Americans’ views about police treatment of black Americans. Analyses of 2017 data from a national probability sample show that adherence to Christian nationalism predicts that Americans will be more likely to believe that police treat blacks the same as whites and that police shoot blacks more often because blacks are more violent than whites. These effects are robust even when including controls for respondents’ religious and political characteristics, indicating that Christian nationalism influences Americans’ attitudes over and above the independent influences of political conservatism or religious parochialism. In fact, we find that religiosity influences policing attitudes in the opposite direction. Moreover, observed patterns do not differ by race, suggesting that Christian nationalism provides a cultural framework that can bolster anti-black prejudice among people of color as well as whites. We argue that Christian nationalism solidifies ethnic boundaries around national identity such that Americans are less willing to acknowledge police discrimination and more likely to victim-blame, even appealing to more overtly racist notions of blacks’ purportedly violent tendencies to justify police shootings. We outline the implications of these findings for understanding the current racial-political climate leading up to and during the Trump Presidency.
Master narratives and narratives as told by people with mental health and drug problems
Authors: Thommesen Hanne
Published: July 2018

This article examines the role of master narratives in self-narratives told by people with both mental health and drug problems. It is based on stories told by people who have both mental health and drug problems. However, their substance abuse has become their most dominant characteristic in their lives. The storytellers or the interviewees attempt to describe their background, their experience and what they call churning thoughts, while their stories are also infiltrated and dominated by master narratives about the drug abuser.
Social care going market
Authors: Bode Ingo
Published: July 2018

Over the last two decades or so, major Western societies have remoulded the institutional set-up by which they are deailing with social risks related to frailty during old age. While the 20th century had brought a transnational tendency towards the establishment of elderly care ‘going public’, the proliferation of more market-based services brings confusion into the societal norm-set underlying the aforementioned tendency. Marketisation has placed the emphasis on economic values engrained in liberal worldviews, leading into a new welfare culture that devaluates universalism and reemphasises the sovereignty of the individual. However, the new cult of the individual produces contradictory signals. Drawing on an encompassing study on the ‘culture of welfare markets’ in elderly care provision, covering two (post-)liberal and two (post-corporatist) welfare regimes (Canada, Britain; France, Germany), the paper looks at these fuzzy developments in order to assess the cultural embeddedness of what can be referred to as the mixed economy of elderly care. The analysis, charting major patterns of both institutional change and public communication around it, elucidates that we currently are facing a permanent struggle between liberal values and (renewed) elements of the ‘going-public-agenda’ proliferating over the 1970s and 1980s, that is, a hybrid and ‘nervous’ cultural configuration in which senior social citizenship remains an issue, albeit on precarious foundations.
A Comparative Analysis of Social Work in Vietnam and Canada
Authors: Durst Douglas , Lanh Thi Huong , Pitzel Myrna
Published: July 2018

Social work education is rapidly developing in the Socialist Republic of Vietnam and it is facing new challenges as it blends the historical, political and cultural influences. This article reviews and compares the historical and recent developments of social work in Canada and Vietnam. Canadian social work developed in Euro-western culture and its values, whereas, Vietnam suffered under French colonialism, a 30 year war of independence and then economic depression. For many years, social work remained nebulous but in recent years, the country has seen a rebirth of social work. Field education is the link from theory to practice and is often where differences between the two countries become evident. The article concludes with a discussion on the professionalization of social work and its future contribution to the emerging “new” Vietnam.
Social Problems in the Russian Army within the Framework of Social Work
Authors: Surkova Irina
Published: July 2018

This article aims at describing social problems we find in the Russian Army. The research has allowed us to get a ranging of servicemen`s social problems: housing, material maintenance and hard-earned money, realization of social guarantees, life conditions and problem of relationships within families, time-limit, the regulation of life, restricting the freedom, humiliating treatment of juniors and bullying. Unsolved social problems of servicemen may also cause that people who are going to protect the country from danger, may become threats themselves. The Russian army consumes a great amount of resources. Recently mass media has put these issues on the public agenda. Focus in article is also to give a picture of how social workers work to solve social problems in the Russian Army.
Maria Edgeworth’s Belinda: A Dialogue with Alexander Pope
Authors: Warren Victoria
Published: July 2018

With theatre motifs encompassing tragedy/comedy and a large cast of characters, Maria Edgeworth’s Belinda (1801) is a philosophical novel, a novel of ideas. Critics troubled by the novel’s two heroines fault its characterization, plot, genres, or “didacticism.” Belinda’s London social setting and the Rousseauvian subplot invite scholarship, as has Belinda in context with English colonialism; however, no one has explored fully the numerous parallels between Edgeworth’s novel and the works of Alexander Pope. In this article, I argue that Pope is more than an allusion in Belinda; he is a substantial presence. I identify important references to Pope and his poetry, and I analyze their significance in Edgeworth’s text. In many ways, Edgeworth’s Belinda is in dialogue with Pope. Exploring this dialogue illuminates Edgeworth’s novel and clarifies important critical issues.
Collaboration in the Humanities: The Art of the Academic Dance
Authors: Alker Sharon , Nelson Holly Faith
Published: July 2018

Sharon Alker and Holly Faith Nelson reflect on how their long-standing sisterly collaborative work in literary analysis began and evolved over time. They unfold how their particular collaborative process works, enabling them to cover multiple literary periods and navigate differences in approaches and writing styles. They also discuss the nature of collaborative work in general, and the way it is often measured (problematically) by the academy as piece-work rather than as a complex, multidimensional work that is often considerably more work than a single-authored article. They call for a re-evaluation of collaborative work in the humanities and greater recognition of the benefits it can offer.
Health-related fitness in preschool children: Difference between organized and unorganized physical activity
Authors: Zarić Dragana , Gojković Zoran , Sporiš Goran , Madić Dejan
Published: July 2018

The aim of this research was to determine the differences in health-related fitness between preschool children involved in organized and unorganized physical activities. This study was performed on a sample of 220 healthy preschool children that were divided into two groups, organized physical activity group (N=99) and unorganized physical activity group (N=121). Beside the set of anthropometric variables children were tested for Standing broad jump, Classic sitand-reach test, Bent arm hang, Sit-ups in 30 seconds and Handgrip strength test. The t-test applied to determine differences between anthropometric characteristic revealed differences for almost all variables (p≤0.05). Moreover, the organized physical activity group showed better results in all fitness variables compared to unorganized group (p≤0.01). It can be concluded that the developmental gymnastics program has influence on improvement of health-related fitness in preschool children.
Nutritional and motor ability status of first- and second- grade students
Authors: Milošević Živan , Čokorilo Dejan , Pajić Nikola , Đorđić Višnja
Published: July 2018

Nutritional status is a relevant indicator of optimal growth and development, as well as the health status of children. Since nutritional status can influence the expression of children’s motor capacities, a study has been carried out in order to examine differences in motor abilities of children in relation to their nutritional status. The sample included 300 first- and second-grade students (132 boys, 168 girls). Students’ motor literacy and motor ability status was evaluated by reduced version of “EUROFIT” test battery, while nutritional status was evaluated based on the body mass index. IOTF criteria were used in order to assign participants into four distinctive groups – underweight, normal weight, overweight and obese. Differences between groups in motor ability status were tested by Kruskal-Wallis and Mann-Whitney tests. No significant differences were found between groups of a different nutritional status in most of the motor abilities, suggesting that BMI does not represent a high-quality predictor of motor abilities of children of lower elementary school grades. 
The influence of morphological characteristics on the specific motor skills of junior-age karate athletes
Authors: Rakita Dušica , Rakonjac Dušan , Vukadinović-Jurišić Mila , Obradović Jelena
Published: July 2018

The aim of this study was to determine the relations between morphological characteristics and specific motor skills of karate athletes, where by the obtained results would be used in better planning and programming of training. Twenty-five young adults karate athletes (15.32 ± 0.22 years) members CC “Šotokan” from Loznica with a sports experience of not less than 8 years participated in this study. The research involved the measurement of certain morphological characteristics and specific motor skills of forward hand punch and foot strikes using standardized tests. The application of the regression analysis showed that there is a statistically significant influence of the system of predictor variables on the criterion variables (p≤0.05) reverse punch - gyaku-zuki (P=0.00), lunge punch - oi-zuki (P=0.00) and front kick - mae-geri (P=0.01). The total variability ranged from 50% of the criterion of the front kick - mae-geri to 60% of the criterion of lunge punch - oi-zuki. The values of the standardized regression coefficient Beta indicate the individual positive and statistically significant influence of the body height and muscle mass variables on the criteria tested: gyaku-zuki, oi-zuki and mae-geri, and the negative impact of the body weight variable on the oi-zuki criterion (pβ≤0,05). A positive influence of the overall body water quantity variable on the gyaku-zuki criterion (pβ≤0,05) was also determined. It can be concluded that there is a connection between the morphological characteristics and the specific motor skills of junior-age karate athletes from Loznica. 
Towards a Spiritual Civilization
Authors: Semple Ian
Published: July 2018

Presented as a plenary address at the Twenty-fifth Annual Conference of the Association for Bahá’í Studies, Seattle, Washington, 2 September 2001.
Apocalypse and Millennium
Authors: Collins William
Published: July 2018

Millennialism—the expectation of a more perfect order through divine intervention—is an important research topic and Bahá’í motif. The Bahá’í vision of a divine plan leading to the Lesser Peace and the Most Great Peace has “progressive” and “catastrophic” aspects. Some twentieth-century speculations on the Lesser Peace anticipated momentous events for three periods with both apocalyptic and peaceful aspects, for example, peace preceded by a catastrophe near the century’s end. This paper reviews some approaches to the Lesser Peace in light of millennialism studies and draws conclusions about Bahá’í “catastrophic” and “progressive” thinking.
Resilience in Children
Authors: Mahmoudi Hoda , Ahmadiyeh Nasim
Published: July 2018

This paper explores the spiritual, psychological, and biological aspects of children and resilience. It analyzes the positive role of early exposure to hardship and argues that the benefits stem from exposure to events requiring adaptation to change. This adaptation occurs at the level of the brain as well as at the level of the soul and spirit, and is mediated by neuroendocrine and molecular events as well as by forces acting upon the soul. Exposure to hardship thus allows the child to learn flexibility and to find his or her sphere of useful service in a constantly changing world.
Ecological Stewardship as Applied Spirituality
Authors: Thelen Steere John
Published: July 2018

Community-based environmental stewardship is the name given to the emerging practice of habitat restoration, land conservation, resource management, and park and community garden creation. This essay explores the significance and the spiritual dimensions of environmental stewardship, and its relationship to the Bahá’í teachings.
TRABLUS’TA BİR EMİRLİK: BENÛ AMMÂR
Authors: KARAKUŞ Nadir
Published: July 2018

Haçlılar Urfa ve Antakya’dan sonra Kudüs’te de bir
devlet kurmuşlar ve Yakın Doğu’nun kalbine yerleşmişlerdi. Ancak Avrupa ile Doğu
Akdeniz arasında köprü olacak bir devlet daha kurmaları gerekiyordu.
Trablusşam’da hüküm süren Benû Ammar bu arzularının önündeki en büyük engeldi.
Emirliğin başında bulunan Fahrulmülk, izlediği ince politikası ve uzlaşmacı
tavrı ile bunu bir müddet geciktirse de sonunda Müslümanlar arasındaki
bölünmüşlük ve Selçuklu Sultanının daha başka konulara öncelik verip, Trablus’daki
Müslümanlara gerekli yardımı sağlayamaması ile emirlik Haçlıların eline geçti
ve burada bir Haçlı devleti kuruldu. Dördüncü Haçlı Devleti de kan ve gözyaşı
üzerine kurulmuştu. Diğerlerinden farklı tarafı ise emirliğe ait binlerce
kitabın olduğu kütüphanenin de yakılmış olması idi. Haçlılar, ele geçirdikleri
yeni topraklar ile Müslümanların yurtlarını ellerinden aldıkları gibi, onların
birikmiş kültürel ve ilmi zenginliklerini de yok ediyorlardı.
TÜRK TEZYİNAT SANATINDA KALEM İŞLERİ
Authors: Sayın Ayşe Zehra
Published: July 2018

Kalem işi sanatı
hakkında yazılmış doğrudan bir kaynak eser özelliğine sahip olan "Türk Tezyinat Sanatında Kalem İşleri" adlı kitap, söz
konusu sanatın ayrıntılarıyla anlatılması açısından oldukça önem teşkil
etmektedir. Kitap; kalem işi sanatının tanımı, teknikleri, kullanılan malzemeleri ve tarihi seyrinin anlatıldığı, giriş ve sonuç kısımları dahil altı kısımdan oluşmaktadır.
UYGUR MİNYATÜRLERİNDE METİN-RESİM İLİŞKİSİ VE SONRASI
Authors: BİÇER ÖZCAN Şehnaz
Published: July 2018

Minyatür
sanatının temel unsuru, yazmadaki metni görsel olarak izleyene sunmaktır. Bu bağlamda minyatür metin ile ilişkilidir. Anlatılmak
veya vurgulanmak istenen olay veya kişilerin çözümlemesi metnin tam olarak
okunması ve incelenmesi mümkündür.

Yazmanın oluşum aşamasındaki sıra, metnin
önce yazılıp minyatürün sonra yapılmasıdır. Dolayısıyla yazım aşamasında hangi
sayfaya minyatür geleceği veya hangi sahnenin yapılacağı hususu belirlenmiş
olmalıdır. Kimi minyatürlerde metin, minyatürün üst veya alt kısmanda
dikdörtgen bir parça olarak devam eder.

Minyatürlerde
kimi zaman da metin; figür veya yapının kenarında, yapının veya şahsın
isimlerinin yazımı olarak yer alır. Bu durum, resmi destekleyici olarak konunun
daha iyi anlaşılması ve şahısların veya yerlerin belirlenmesi için uygulanır.
Farklı dönemlerde ve coğrafyalarda yazma eserlerdeki metin-minyatür ilişkisi
Osmanlı Devleti’nin sonuna kadar yani yazma eser geleneğinin bitimine kadar
sürmüştür.
TÜRK MÛSİKÎSİNİN TASNÎF VE TESMİYELERİNE BİR BAKIŞ
Authors: GÖNÜL Mehmet
Published: July 2018

Türk
mûsikîsi asırların süzgecinden geçerek günümüze ulaşan, pek çok farklı tür ve
biçimde eserlerden meydana gelen büyük bir kültür atlasına hâizdir. Mûsikîmizin
ihtivâ ettiği zenginlikler, geçmişten günümüze türler ve biçimler başlıkları
altında farklı yaklaşımlarla tasnîf edilegelmiştir. Bu tasnifler esnasında
kullanılan bir takım isim ve tamlamalar zaman zaman içeriği gereğince işaret
edemeyen kavramların ve sorunların türemesine yol açmıştır.

Türk
mûsikîsi, din olgusu temelinde çeşitlenmiş bir mûsikîdir. Mûsikîmizde dînî
mûsikî başlığı altında ifade edilen ve ibâdet maksadı gözetilerek üretilen eser
ve icrâlardan yola çıkılarak yapılan tasnifler, asârın ciddi bir kısmını lâdîni
ifadesi ile dinin dışına itmektedir.

Aynı
şekilde Türk mûsikîsi için kullanılan “Klasik Türk Mûsikîsi”, “Türk Sanat
Müziği”, “Türk Halk Müziği” adlandırmaları da anlam, muhteviyat, maksat vb.
bakımlardan kanaatimizce sorunludur. Mûsikîmizin tasnifinde karşılaşılan
sorular ve sorunlara bir bakış açısı getirmek maksadı ile bu makale kaleme
alınmış, mezkûr sorunların çözümüne ilişkin bir takım öneriler sunulmuş ve
irdelenmiştir.
Utilizing a discovery learning, real-world based fruit juice clarification experiment to enhance teaching and learning of biological enzyme concepts
Authors: Ewe Joo Ann , Tam Sheh May
Published: July 2018

Discovery learning is an approach that encourages students to become active participants in the learning process by exploring concepts and answering questions through experience. It is one of several inquiry-based learning techniques that seems particularly suited to the instruction of science since performing experiments is one of the key methods in discovery learning. However, the efficacy of discovery learning projects have not been explored much in Malaysia. In this study, an experiment integrated with real-world biotechnology industry example focusing on the function of the enzyme pectinase in the clarification of fruit (apple) juice was adapted and introduced to a group of urban, international secondary school science students who had undergone prior direct instructional guidance on the biological role and function of enzymes. The students were asked to complete a set of pre-experiment and post-experiment questions in order to analyse the impact of the experiment on their understanding of this topic. Results suggest that this discovery learning project do strengthen the learners’ prior knowledge and understanding of the function of biological enzymes through application of concept based on real world practice. High level of positive feedback was received (86.2%), with the students commenting on the “fun aspect”, being excited about being able to perform the experiment and expanding their understanding by linking their findings with a real-world, industrial application. Given the reported steady decline of Malaysian students enrolled in STEM (Science, Technology, Engineering and Mathematics) courses at secondary and tertiary levels, our findings suggest that developing and including more real-world, discovery type projects in secondary schools may help to effectively raise student interests in science subjects such as biology through new learning approaches.
Central Limit Theorem in the Sociology Classroom
Authors: Bechtold Brigitte Helene
Published: July 2018

To undergraduate students of sociology, and who are required to take at least one course in research methods, understanding of the CLT requires the successful negotiation of a number of hurdles, lack of training in mathematics in general and mathematical statistics in particular, and a sociological aversion to the “bell curve” or normal distribution. This paper critiques the “sweetening” approaches to conduct experiments that construct the Central Limit Theorem in the classroom. It proceeds to outline a simple type of experiment based on a discrete rectangular population distribution, and offers a proof, understandable to sociology undergraduates, of how a discrete rectangular population distribution gives rise to a continuous sampling distribution.
Virtual Standardized Patient
Authors: Oden Kristy , Nelson Michelle , Lee Marilyn
Published: July 2018

Background: Higher education nursing programs include a physical/health assessment course that prepares graduates to provide excellent care based on data collected through assessment. Finding a teaching strategy that engages students as well as educates them in health assessment techniques is a challenge that all nurse educators share.

Objectives: The objectives of this study were to determine the level of engagement and learning that occurred with undergraduate and graduate students who participated in a health assessment course that included the use of an online virtual standardized patient (VSP).

Design: Quantitative, descriptive survey research was utilized to determine student nurses’ perception of the use of VSP in a physical assessment course. 

Setting/Participants: Students in a traditional on-campus BSN program and students in an online RN to BSN and MSN program were included in this study.

Methods: After receiving IRB approval, course leaders provided students a standardized questionnaire of two (2) multiple choice and six (6) Likert-style questions. The questions evaluated the participants’ ease of use, comparison of interaction between online virtual and live human patients, ability to perform an exam on a virtual patient, and ability to communicate with a virtual patient.  Questionnaires were administered to volunteers in the three identified health assessment courses (BSN, RN-BSN, and MSN).  Also evaluated was the participant’s perception of their ability to transfer knowledge from the VSP to the live patient.  All students participated in the VSP with completion of the questionnaire optional.

Results: Findings in this study generally supported the educational value of using a virtual standardized patient in teaching both undergraduate and graduate students’ health assessment. Variations between the groups were found.

Conclusion: Use of a virtual standardized patient is a positive teaching strategy for teaching health assessment in both undergraduate and graduate nursing programs.
EXPERIMENTAÇÃO CONTEXTUALIZADA SOBRE EQUILÍBRIO QUÍMICO PARA TURMA DE ENSINO MÉDIO
Authors: Figueirêdo Alessandra Marcone Tavares Alves de , Silva Júnior Carlos Alberto da , Silva Daniel Gabriel da , Tavares Márcio Jean Fernandes , Núñez Jaime Patricio Leiva
Published: July 2018

No Brasil, o Governo Federal, em 2016, lançou uma medida provisória (MP) sobre a reforma do Ensino Médio, visando diminuir os altos índices de evasão nas escolas. O problema dessa MP é focar-se muito em mudanças temerárias e superficiais, enquanto que as maiores dificuldades se concentram nas metodologias obsoletas utilizadas em sala de aula, na falta de formação continuada dos professores e, ainda, na insuficiência de profissionais na área, esses são pontos cruciais onde as verdadeiras reformas políticas deveriam acontecer. Neste último, sobre a escassez de docentes, a problemática é mais acentuada na área das Ciências Exatas, como na disciplina Química, logo, faz-se necessária alguma ação para incentivar os discentes a seguirem a carreira docente. Neste sentido, surgiu o Programa Internacional – PDVL que tem como objetivo desenvolver ações no intuito de despertar o interesse dos estudantes pela Licenciatura. Este programa tem caráter de ensino, pesquisa e extensão e participam dele alguns licenciandos em Química do Instituto Federal da Paraíba - IFPB, campus João Pessoa que estão à frente deste trabalho. Para tanto, é de suma importância desenvolver atividades que despertem a motivação e o interesse por essa Ciência. Com isso, o objetivo dessa pesquisa foi desenvolver e aplicar experimentos, especificamente com o conteúdo sobre o Princípio de Le Chatelier, na tríade, Ciência, Tecnologia e Sociedade (CTS), no intuito de facilitar o processo de ensino-aprendizagem da disciplina Química. A metodologia do trabalho foi desenvolvida sob uma perspectiva quantiqualitativa e participante, integrada à realidade dos discentes. Trabalhou-se com 20 (vinte) alunos de uma turma do 3º ano do Ensino Médio, da Escola Estadual de Ensino Fundamental e Médio José Baptista de Mello, localizada no bairro de Mangabeira, em João Pessoa, Paraíba-Brasil. Os resultados obtidos mostraram que houve um impacto positivo no aprendizado dos discentes, por meio de uma avaliação processual, quantitativa e qualitativa.
NEGRINHA PODE SER SALVA? PRÁTICAS DE AUTORIA, REDES SOCIAIS E MULTILETRAMENTOS
Authors: Leitão André Alexandre Padilha
Published: July 2018

O objetivo desse trabalho é apresentar os resultados de uma pesquisa exploratória relativa ao ensino-aprendizagem de literatura a partir do gênero conto em articulação com a produção do gênero discursivo não literário entrevista, utilizando-se tecnologias digitais de modo a promover multiletramentos e autoria. Esta pesquisa, no que se refere à leitura/interpretação de textos literários, fundamentar-se-á nos conceitos de Polifonia e Dialogismo de M. Bakhtin (2013) a fim de que as vozes do discurso ficcional – narrador e personagens – articulem-se com as vozes não-ficcionais agentes do discurso literário de modo a favorecer a construção do letramento literário como proposto por Cosson (2016). Nesse sentido, o estudo dos elementos da narrativa em uma perspectiva sócio-histórica permite que se construam sentidos que ultrapassam a estrutura superficial da história ficcional. Em relação às práticas de autoria, considera-se o desenvolvimento dos diferentes tipos de letramento como aspecto central. Para tanto, adotou-se a perspectiva de trabalho do The New London Group (1996) ao propor a pedagogia dos multiletramentos cujos princípios focalizam modos de representação mais amplos do que apenas a língua escrita. Entende-se que a partir de uma abordagem diferenciada e aprofundada do texto literário é possível ressignificar e ampliar os seus significados, criando – no sentido de produção textual de um gênero não literário – as vozes ficcionais e não-ficcionais implícitas, mas não inexistentes, no texto. Dessa maneira, assume-se como essencial a concepção de discurso como prática social de acordo com as proposições de Fairclough (2008), que considera os processos de interpretação e produção textuais como socialmente restringidos. Ao serem compreendidos a partir dos seus condicionamentos histórico-sociais, os textos literários possibilitam leituras diferenciadas dos sentidos propostos pelo texto enquanto objeto de estudo. Dessa maneira, a produção de um gênero discursivo que revele outras vozes – implícitas e presentes – no discurso ficcional mostraram-se promotoras de práticas de autoria não se limitando ao resumo ou a resenha crítica da obra literária, mas sim um verdadeiro diálogo, no sentido bakhtiniano do termo, entre autores-leitores-interlocutores
USO DA REPRESENTAÇÃO SOCIAL PARA AVALIAR A APRENDIZAGEM DOS ESTUDANTES NO ENSINO DE QUÍMICA
Authors: Figueirêdo Gesivaldo Jesus Alves de , Nóbrega Patrícia Brito Souza da , Meza Lastenia Ugalde , Núñez Jaime Patricio Leiva
Published: July 2018

As representações sociais informam as concepções que os indivíduos possuem a respeito de um tema, permitindo interpretar e discutir a influência do meio sobre o pensamento do coletivo e, assim, serem utilizadas como instrumento avaliativo da aprendizagem e levantamento dos conhecimentos prévios dos educandos sobre determinada temática a ser abordada. Nessa perspectiva, a pesquisa objetivou avaliar a representação social dos estudantes do 2º ano do Curso Técnico de Controle Ambiental Integrado ao Ensino Médio do IFPB, Campus João Pessoa, no ensino de Química, por meio da técnica de evocação livre de palavras, a qual permitiu orientar e avaliar a contextualização da Química com a temática qualidade de água, bem como identificar que, nos resultados obtidos das palavras evocadas após a aplicação da metodologia houve uma aprendizagem significativa e a correlação mais efetiva dos conteúdos químicos com o cognitivo dos estudantes.
PROPUESTA METODOLÓGICA PARA INCENTIVAR EL USO DE LAS TIC EN LA ENSEÑANZA DE LA QUÍMICA EN EL CONTEXTO ESCOLAR
Authors: Meza Lastenia Ugalde , Núñez Jaime Patricio Leiva , Figueirêdo Gesivaldo Jesus Alves de , Figueirêdo Alessandra Marcone Tavares Alves de
Published: July 2018

El foco de esta investigación es establecer estrategias para incentivar a docentes de ciencias del sistema educativo a incorporar el uso de las tecnologías como prácticas permanentes en su quehacer pedagógico. Se sabe que la capacitación de los docentes del sistema escolar chileno en el uso de las Tic no muestra un avance significativo en este ámbito, así lo demuestran las pruebas Simce Tic, donde más del 80% de los estudiantes indican que sus profesores de ciencias no usan nunca el computador en sus clases. Nuestro principal objetivo es trabajar directamente con profesores de química del sistema escolar, para que a través del trabajo colaborativo se establezcan metodologías para la incorporación de las tecnologías en el aula.
LUDO DAS LIGAÇÕES QUÍMICAS: UM JOGO DIDÁTICO NO ENSINO DE QUÍMICA
Authors: Nascimento Ayrton Matheus da Silva , Vieira Welly Evilly da Silva , Araújo Natália Kelly da Silva , Melo Higor Diego Farias de , Viana Kilma da Silva Lima
Published: July 2018

Esse artigo apresenta os resultados iniciais de uma pesquisa desenvolvida na disciplina de Prática Profissional (IV) do Curso de Licenciatura em Química do Instituto Federal de Pernambuco – IFPE Campus Vitória, onde a disciplina tem o objetivo de estudar, analisar e elaborar recursos didáticos, dentre esses, o jogo didático irá ser utilizado em nossa pesquisa. O presente estudo aborda o desenvolvimento, aplicação e a avaliação de um jogo didático com a utilização do Ciclo da Experiência Kellyana (CEK) para o ensino de química geral no ensino médio, no conteúdo de Ligações Química (Ligações covalentes) por meio de situação em que os estudantes consigam compreender e diferenciar os compostos covalentes, formar as estruturas e aprender a regra do octeto. Analisando estas situações, este trabalho tem a intenção de abordar uma intervenção com um Jogo Didático intitulado: Ludo das Ligações Químicas, com 38 (trinta e oito) estudantes de uma turma de primeiro ano do IFPE - Campus VSA. Para isso, foi aplicado o jogo com os estudantes e questionários (Q1 e Q2) sobre a observação e vivência do CEK. Como objetivos atingidos, foi analisado o quanto o jogo auxiliou na compreensão dos conteúdos, pois os estudantes compreenderam as ligações covalentes de forma mais divertida e atrativa, precipuamente com relação à identificação dos compostos covalentes e suas respectivas estruturas, dessa forma compreendendo a regra do octeto. Além disso, pudemos identificar a partir dos questionários que os estudantes aprimoraram suas hipóteses iniciais acerca do conteúdo que foi abordado no CEK e solidificaram seus conhecimentos.
Changes in the distribution of F-latency (DFL) for different postures of head and neck
Authors: Sharmin Sabrina , Rabbani K Siddique e
Published: July 2018

Distribution of F-Latency (DFL) is a new neurological parameter conceived by the Biomedical Physics group of Dhaka University. Previous experimental studies have indicated that DFL, obtained from median nerve, varies with postures of the subject, particularly with the bending of the head. It agreed with the contention that bending of head might produce compression or stretching of nerve fibers as they come out of the vertebra, and that DFL is a sensitive parameter that gets affected by even such temporary changes. The present work was taken up with two objectives, i) to improve upon the earlier work by taking measurements with a few specific angles of head bending, particularly in the left and right directions, and ii) to provide a verification of earlier results. For bending of head to left and right sides, we chose 300 and 450 respectively. For forward and backward directions the angles were not measured and the subjects were asked to bend as much as they could without going beyond a comfort level. The study was carried out on 6 student volunteers aged between 24 and 26. The DFLs obtained with different postures of the head were analyzed to look for systematic trends in the changes, if any. Changes in several parameters like peak, mean, standard deviation, skewness and half-width in the rising and falling edges (down to 50 % height of the peak) were studied for different postures of head and neck which showed consistent changes.Bangladesh Journal of Medical Physics Vol.9 No.1 2016 1-10
Development of an electrical impedance based spirometer
Authors: Ali Md Anas , Kadir M Abdul , Rabbani K Siddique e
Published: July 2018

Spirometry, or measurement of respiration conventionally involves measurement of the time variation of volume or flow of air breathed in or out through the mouth using an air-flow sensor. Electrical impedance of thorax changes during breathing and conceptually this modality should be applicable in spirometry, but no attempts have been made so far. This paper describes the development of an electrical impedance based spirometer placing electrodes on four limbs so that the whole lung volume may contribute to the measurement. An impedance based measurement system (IBS) consisting of a constant current drive at 11 kHz and necessary voltage measurement circuitry was designed and developed for this purpose. A portable oscilloscope (PicoScope 2208A) was used for acquisition of the measured voltage signal to a PC and an algorithm in Matlab software was used to demodulate the time varying impedance from a carrier signal. The variation of impedance with time during forced expiration as measured by the implemented impedance measurement system was compared with that obtained using a standard bellows type commercial spirometer (Vitalograph) on eight volunteers, between 22 and 32 years of age. The subjects included smokers, non-smokers, and asthma patients. Repeatability of the measurements were satisfactory. The correlation coefficient between the spirogram obtained using the IBS and that obtained using standard spirometer varied from 0.81 to 0.99 indicating preliminary success of the proposed technique. However, a possible source of error is the bending of the body during forced expiration which, if prevented, may give a better outcome.Bangladesh Journal of Medical Physics Vol.9 No.1 2016 17-27
Mathematical analysis of non-Newtonian nanofluid transport phenomena past a truncated cone with Newtonian heating
Authors: Nallagundla Nagendra , Amanulla C. H. , Reddy M. Suryanarayana
Published: July 2018

In the present study, we analyze the heat, momentum and mass (species) transfer in external boundary layer flow of Casson nanofluid past a truncated cone surface with Biot Number effect is studied theoretically. The effects of Brownian motion and thermophoresis are incorporated in the model in the presence of both heat and nanoparticle mass transfer Biot Number effect. The governing partial differential equations (PDEs) are transformed into highly nonlinear, coupled, multi-degree non-similar partial differential equations consisting of the momentum, energy and concentration equations via. Appropriate non-similarity transformations. These transformed conservation equations are solved subject to appropriate boundary conditions with a second order accurate finite difference method of the implicit type. The influences of the emerging parameters i.e. Casson fluid parameter (?), Brownian motion parameter (Nb) and thermophoresis parameter (Nt), Lewis number (Le), Buoyancy ratio parameter (N ), Prandtl number (Pr) and Biot number (Bi) on velocity, temperature and nano-particle concentration distributions is illustrated graphically and interpreted at length.  Validation of solutions with a Nakamura tri-diagonal method has been included. The study is relevant to enrobing processes for electric-conductive nano-materials of potential use in aerospace and other industries.
Assemblage and Species Threshold Responses to Environmental and Disturbance Gradients Shape Bat Diversity in Disturbed Cave Landscapes
Authors: Phelps Kendra , Jose Reizl , Labonite Marina , Kingston Tigga
Published: July 2018

Ecological thresholds represent a critical tipping point along an environmental gradient that, once breached, can have irreversible consequences for species persistence and assemblage structure. Thresholds can also be used to identify species with the greatest sensitivity to environmental changes. Bats are keystone species yet are under pressure from human disturbances, specifically landscape and cave disturbances (i.e., reduced forest cover, urbanization, hunting, tourism). We compared bat assemblages across environmental and disturbance gradients measured at 56 caves in the Philippines to identify species-specific thresholds and assess congruence among species responses. All species exhibited significant responses to one or more gradients, with 84% responding to more than one gradient. Yet mixed responses of sensitivity to some gradients but tolerance to others hindered identification of assemblage thresholds to all gradients except landscape disturbance. However, we identified credible indicator species that exhibit distinct thresholds to specific gradients and tested for differences in ecological and morphological traits between species groups with shared responses (i.e., negative or positive). Few traits were useful for discriminating the direction of a species response, with some exceptions. Species that responded positively to increased landscape disturbance and hunting had greater body mass, whereas species that responded negatively to mining emitted higher peak call frequencies.
A Distributed PV System Capacity Estimation Approach Based on Support Vector Machine with Customer Net Load Curve Features
Authors: Wang Fei , Li Kangping , Wang Xinkang , Jiang Lihui , Ren Jianguo , Mi Zengqiang , Shafie-khah Miadreza , Catalão João P. S.
Published: July 2018

Most distributed photovoltaic systems (DPVSs) are normally located behind the meter and are thus invisible to utilities and retailers. The accurate information of the DPVS capacity is very helpful in many aspects. Unfortunately, the capacity information obtained by the existing methods is usually inaccurate due to various reasons, e.g., the existence of unauthorized installations. A two-stage DPVS capacity estimation approach based on support vector machine with customer net load curve features is proposed in this paper. First, several features describing the discrepancy of net load curves between customers with DPVSs and those without are extracted based on the weather status driven characteristic of DPVS output power. A one-class support vector classification (SVC) based DPVS detection (DPVSD) model with the input features extracted above is then established to determine whether a customer has a DPVS or not. Second, a bootstrap-support vector regression (SVR) based DPVS capacity estimation (DPVSCE) model with the input features describing the difference of daily total PV power generation between DPVSs with different capacities is proposed to further estimate the specific capacity of the detected DPVS. A case study using a realistic dataset consisting of 183 residential customers in Austin (TX, U.S.A.) verifies the effectiveness of the proposed approach.
Graphene Oxide: An Effective Promoter for CO2 Hydrate Formation
Authors: Yan Shuo , Dai Wenjie , Wang Shuli , Rao Yongchao , Zhou Shidong
Published: July 2018

The main difficulties in applying technologies based on hydrate formation are the slow hydrate formation rate, low storage capacity, severe formation conditions and environmentally devastating promoters. Nano-sized graphene oxide has special microstructure features such as its functional groups and a large specific surface area, which can lead to high heat and mass transfer efficiency, large gas dissolution, fast nucleation and formation rate. In this work, CO2 hydrate formation with and without graphene oxide nanoparticles was investigated. Herein, the promoting mechanism and effects of graphene oxide concentrations in different initial pressures ranging from 3 to 5 MPa at 279 K on CO2 hydrate formation process were studied experimentally. The experimental results showed that graphene oxide can shorten the induction time by 53–74.3% and increase the gas consumption up to 5.1–15.9% under different system pressures. Based on the results, the optimum concentration was ascertained as 50 ppm under which condition, the induction time and the reaction time were the shortest while the pressure drop and the gas consumption reached the maximum.
Study on Impulse Breakdown Characteristics of Internal-Gap Lightning Protection Device Applied to 35 kV Distribution Line
Authors: Fang Zhen , Wang Bowen , Lu Jiazheng , Jiang Zhenglong
Published: July 2018

External environmental factors have no effect on the breakdown performance of the internal gap, leading to the anti-icing and anti-storm features of the internal-gap lightning protection device (ILPD). In this paper, a test platform is created to study the impulse discharge and arc erosion characteristics of the ILPD applied to a 35 kV distribution line. The 50% lightning impulse voltage and discharge stability of the ILPD are experimentally analysed. The results show that the ILPD has good discharge voltage repeatability under multiple impulses. Under a positive lightning impulse, the 50% breakdown voltage of the ILPD is 3.8–11.4% higher than that of the outer-gap lightning protection device (OLPD). A finite element simulation model is created for electric field analysis. The maximum electric field strength of the ILPD is 4.68% lower than that of the OLPD, leading to a higher lightning breakdown voltage. High-speed camera shooting shows that the discharge arc may lead to the erosion of the discharge tube, reducing its insulation performance. A large current impulse test platform is set up for arc energy analysis, which indicates that more than 90% of the energy is absorbed by the varistor during lightning stroke. The quality and leakage current of the discharge tube did not change significantly after testing. Given the current design of varistors, the per unit length energy of arc is less than 4.5 J/mm due to the numerical calculation, which is far less than the experimental arc energy (25.0 J/mm). Therefore, arc erosion will not cause the insulation performance of discharge tube to decrease when using the current varistor design.
Quantile Regression Post-Processing of Weather Forecast for Short-Term Solar Power Probabilistic Forecasting
Authors: Massidda Luca , Marrocu Marino
Published: July 2018

The inclusion of photo-voltaic generation in the distribution grid poses technical difficulties related to the variability of the solar source and determines the need for Probabilistic Forecasting procedures (PF). This work describes a new approach for PF based on quantile regression using the Gradient-Boosted Regression Trees (GBRT) method fed by numerical weather forecasts of the European Centre for Medium Range Weather Forecast (ECMWF) Integrated Forecasting System (IFS) and Ensemble Prediction System (EPS). The proposed methodology is compared with the forecasts obtained with Quantile Regression using only IFS forecasts (QR), with the uncalibrated EPS forecasts and with the EPS forecasts calibrated with a Variance Deficit (VD) procedure. The proposed methodology produces forecasts with a temporal resolution equal to or better than the meteorological forecast (1 h for the IFS and 3 h for EPS) and, in the case examined, is able to provide higher performances than those obtained with the other methods over a forecast horizon of up to 72 h.
Secondary Invasions Hinder the Recovery of Native Communities after the Removal of Nonnative Pines Along a Precipitation Gradient in Patagonia
Authors: Torres Agostina , Alarcón Pablo A. E. , Rodríguez-Cabal Mariano A. , Nuñez Martín A.
Published: July 2018

The removal of nonnative species can lead to re-invasion by nonnative species, especially in communities with multiple co-occurring invaders. Biotic and abiotic conditions shape community structure, reducing the predictability of nonnative management. We evaluated plant community recovery after the removal of nonnative pines with an emphasis on the effect of environmental conditions on the nonnative species response. We compared clearcuts (where pine plantations were removed), pine plantations, and native communities along a precipitation gradient in Patagonia. Nonnative richness and cover were higher in clearcuts compared to native communities along nearly the entire precipitation gradient, with the exception of the harshest sites. Compared to native communities, invasion resistance was lower in clearcuts in the wetter sites. Native richness and cover were lower in clearcuts relative to native communities along the gradient. Species composition in clearcuts diverged in similarity from native communities towards the wetter sites. Plantations showed an extremely lower richness and cover compared to both clearcuts and native communities. Our study highlights that clearcutting is an ineffective strategy to manage nonnatives aimed at restoring native communities and elucidates the importance of environmental context in management approaches. Taken together, our findings reinforce the important consideration of both the biotic and abiotic context of nonnative management.
Stem Circadian Phenology of Four Pine Species in Naturally Contrasting Climates from Sky-Island Forests of the Western USA
Authors: Ziaco Emanuele , Biondi Franco
Published: July 2018

We identified intra-annual climatic drivers of stem water relationships and growth in foundation conifers at a subalpine site in the Great Basin Desert and at a montane site in the Mojave Desert (Nevada, USA). Sites were instrumented to represent naturally different levels of heat and drought stress as part of NevCAN (the Nevada Climate and ecohydrological Assessment Network). We analyzed three years (2013–2015) of sub-hourly dendrometer records for limber (Pinus flexilis) and bristlecone pine (Pinus longaeva) at the subalpine site, and for ponderosa (Pinus ponderosa) and pinyon pine (Pinus monophylla) at the montane site. Multiple logistic regression was used to identify relationships with environmental variables measured in-situ. At both sites, stem expansion occurred during the early morning and late afternoon, and irreversible stem increment was concentrated in the early morning hours. In subalpine species, stem growth started in late spring and continued until August, while at the montane site stem growth was episodic, peaking during summer monsoonal rainstorms. Circadian maximum and minimum stem size during the growing season were reversed during the dormant season at the colder/wetter subalpine site but not at the warmer/drier montane one. Knowledge of intra-annual tree-water relationships and stem growth helps understand how sky island forests grow under highly diverse climatic conditions, including severe drought and heat stress.