bluuebunny/crossref_metadata_2025 huggingface dataset:
Low-Velocity Impact Characterization of Fiber-Reinforced Composites with Hygrothermal Effect
Authors: Zai Behzad Ahmed , Khan M. A. , Park M. K. , Shahzad Majid , Shahzad M. A. , Nisar Salman , Khan S. Z. , Khan Kamran , Shah Aqueel
Published: June 2018

In this article, low-velocity impact characteristics of UHN125C carbon fiber/epoxy composite, including unidirectional (0°), cross-directional (0°/90°), and quasi-isotropic layups, were experimentally measured. The effect of the fiber orientation angle and stacking sequences on impact force and induced strain were measured via an instrumented drop-weight apparatus with special concern for the moisture absorption effect. Dried specimens were immersed in distilled water for a certain period of time to absorb water for intermediate and saturated moisture content. It was observed that the impulse was reduced with the increase in moisture content; on the other hand, strain increased with moisture, as measured by DBU-120A strain-indicating software (MADSER Corp., El Paso, TX). Impact damage is widely recognized as one of the most detrimental damage forms in composite laminates because it dissipates the incident energy by a combination of matrix damage, fiber fracture, and fiber-matrix debonding. Therefore, it is extremely important to know the impact strength of a structure, especially for applications in industries such as aerospace, ship design, and some other commercial applications. The use of composite materials in engineering applications is increasing rapidly because they have higher strength-to-weight ratios than metals. The strength, stiffness, and, eventually, the life of composite materials are affected more than conventional materials by the presence of moisture and temperature. Thus, it is necessary to analyze the response of composites in a hydrothermal environment.
Pharmacological Dopamine Manipulation Does Not Alter Reward-Based Improvements in Memory Retention during a Visuomotor Adaptation Task
Authors: Quattrocchi Graziella , Monaco Jessica , Ho Andy , Irmen Friederike , Strube Wolfgang , Ruge Diane , Bestmann Sven , Galea Joseph M.
Published: June 2018

Motor adaptation tasks investigate our ability to adjust motor behaviors to an ever-changing and unpredictable world. Previous work has shown that punishment-based feedback delivered during a visuomotor adaptation task enhances error-reduction, whereas reward increases memory retention. While the neural underpinnings of the influence of punishment on the adaptation phase remain unclear, reward has been hypothesized to increase retention through dopaminergic mechanisms. We directly tested this hypothesis through pharmacological manipulation of the dopaminergic system. A total of 96 young healthy human participants were tested in a placebo-controlled double-blind between-subjects design in which they adapted to a 40° visuomotor rotation under reward or punishment conditions. We confirmed previous evidence that reward enhances retention, but the dopamine (DA) precursor levodopa (LD) or the DA antagonist haloperidol failed to influence performance. We reason that such a negative result could be due to experimental limitations or it may suggest that the effect of reward on motor memory retention is not driven by dopaminergic processes. This provides further insight regarding the role of motivational feedback in optimizing motor learning, and the basis for further decomposing the effect of reward on the subprocesses known to underlie motor adaptation paradigms.
Multiple Nonsense-Mediated mRNA Processes Require Smg5 in Drosophila
Authors: Nelson Jonathan O , Förster Dominique , Frizzell Kimberly A , Luschnig Stefan , Metzstein Mark M
Published: June 2018

The nonsense-mediated messenger RNA (mRNA) decay (NMD) pathway is a cellular quality control and post-transcriptional gene regulatory mechanism and is essential for viability in most multicellular organisms . A complex of proteins has been identified to be required for NMD function to occur; however, there is an incomplete understanding of the individual contributions of each of these factors to the NMD process. Central to the NMD process are three proteins, Upf1 (SMG-2), Upf2 (SMG-3), and Upf3 (SMG-4), which are found in all eukaryotes, with Upf1 and Upf2 being absolutely required for NMD in all organisms in which their functions have been examined. The other known NMD factors, Smg1, Smg5, Smg6, and Smg7, are more variable in their presence in different orders of organisms and are thought to have a more regulatory role. Here we present the first genetic analysis of the NMD factor Smg5 in Drosophila. Surprisingly, we find that unlike the other analyzed Smg genes in this organism, Smg5 is essential for NMD activity. We found this is due in part to a requirement for Smg5 in both the activity of Smg6-dependent endonucleolytic cleavage, as well as an additional Smg6-independent mechanism. Redundancy between these degradation pathways explains why some Drosophila NMD genes are not required for all NMD-pathway activity. We also found that while the NMD component Smg1 has only a minimal role in Drosophila NMD during normal conditions, it becomes essential when NMD activity is compromised by partial loss of Smg5 function. Our findings suggest that not all NMD complex components are required for NMD function at all times, but instead are utilized in a context-dependent manner in vivo.
Rationalist Hymnbooks in the Early 19th century Latvian Literature: an Episode in the History of Reading in Livonia and Courland
Authors: Daija Pauls
Published: June 2018

[full article, abstract in English; abstract in Lithuanian]

The article explores the introduction of the Rationalist hymnbooks in the Latvian literature during the first decade of the 19th century as an episode in the history of reading in Livonia and Courland. The reformed hymnbooks met with strong resistance of the Latvian reading public that might be explained by the significant place of the traditional hymnbook in peasants’ lives. In the article, the process of the introduction of new hymnbooks has been analysed along with the reasons for a dismissive attitude from the Latvian readers. In the context of the history of reading, the introduction of new hymnbooks has been described in terms of segregation in the reading public, as analysed by the Latvian scholar Aleksejs Apīnis.
Pragmatics Communication Deficiencies and the Role of Gamification
Authors: Toki Eugenia I. , Fakitsa Polyxeni , Drosos Konstantinos , Pange Jenny , Siafaka Vassiliki , Karampas Andreas , Petrikis Petros
Published: June 2018

The proper use of language for communication in any context is defined as Pragmatics. Pragmatics includes the linguistic adjustments made (what is said, how it is said, body language, appropriateness) in order to accomplish the communication goal. Children and adults may be referred for rehabilitation when pragmatic communication deficits have an impact on social functioning, employment, and family/marital relationships (Turkstra, et al., 2016). The aim of this study is to examine gamification as an alternative to supplement clinical assessment procedures of an individual’s communication deficiencies with a focus on pragmatics perception, which led to the creation of a mobile gamified procedure designed to collect data on pragmatics perception. The gamified procedure was created in Kahoot! and was played by a sample of two hundred and fifty-six (256) university students with non-acquired communicative deficits studying health related courses in Greece. Data on points scored, response accuracy and duration of time spent on of each language feature was recorded. A detailed description on students’ pragmatics abilities and motivation was reported. The results of the study described normative data concerning points scored, response time and accuracy of language features. Statistically significant differences were found between genders in terms of response accuracy and time for some language features. The gamified e-assessment has the clear potential to contribute innovatively to the clinical assessment procedures of pragmatic communicative deficits including the needs of individuals with developmental disorders, psychiatric disorders, acquired brain injury, neurodegenerative disorders in a motivating way along with current technological advances of face to face and/or telepractice services.
A Comparison of the Entrance Examinations for Post-graduate Music Education at Selected Estonian and Finnish Universities
Authors: Ruokonen Inkeri , Kiilu Kristi , Sepp Anu , Ruismäki Heikki
Published: June 2018

The primary goal of music teacher education programs is to produce good teachers for schools and how to identify them through entrance examinations. This study examines the kind of entrance examinations in place at the masters’ level in music education in Estonian and Finnish universities, and the similarities or differences between these examinations. In this study, the aims, content, focus areas, and the background philosophy of the entrance examinations are compared and discussed. Similarities identified include testing of aptitude to become a music teacher, practical musicianship, singing, playing different instruments, music theory and solfége. The main differences revealed that in Estonia there are two entrance examinations (Bachelor and Master level) and a teaching session for candidates is not required. What is most challenging to evaluate is the pedagogical motivation because the entrance examination cannot assess long-term motivation, commitment required to teach music or reacting in problem situations.
Objective Sleep Characteristics and Cardiometabolic Health in Young Adolescents
Authors: Cespedes Feliciano Elizabeth M. , Quante Mirja , Rifas-Shiman Sheryl L. , Redline Susan , Oken Emily , Taveras Elsie M.
Published: June 2018

BACKGROUND AND OBJECTIVES:

Shorter sleep duration is associated with childhood obesity. Few studies measure sleep quantity and quality objectively or examine cardiometabolic biomarkers other than obesity.

METHODS:

This cross-sectional study of 829 adolescents derived sleep duration, efficiency and moderate-to-vigorous physical activity from >5 days of wrist actigraphy recording for >10 hours/day. The main outcome was a metabolic risk score (mean of 5 sex-specific z-scores for waist circumference, systolic blood pressure, high-density lipoprotein cholesterol scaled inversely, and log-transformed triglycerides and homeostatic model assessment of insulin resistance), for which higher scores indicate greater metabolic risk. Secondary outcomes included score components and dual-energy radiograph absorptiometry fat mass. We measured socioeconomic status, race and/or ethnicity, pubertal status, and obesity-related behaviors (television-viewing and fast food and sugar-sweetened beverage consumption) using questionnaires.

RESULTS:

The sample was 51.5% girls; mean (SD) age 13.2 (0.9) years, median (interquartile range) sleep duration was 441.1 (54.8) minutes per day and sleep efficiency was 84.0% (6.3). Longer sleep duration was associated with lower metabolic risk scores (−0.11 points; 95% CI: −0.19 to −0.02, per interquartile range). Associations with sleep efficiency were similar and persisted after adjustment for BMI z score and physical activity, television-viewing, and diet quality. Longer sleep duration and greater sleep efficiency were also favorably associated with waist circumference, systolic blood pressure, high-density lipoprotein cholesterol, and fat mass.

CONCLUSIONS:

Longer sleep duration and higher sleep efficiency were associated with a more favorable cardiometabolic profile in early adolescence, independent of other obesity-related behaviors. These results support the need to assess the role of sleep quantity and quality interventions as strategies for improving cardiovascular risk profiles of adolescents.
La incorporación del Distrito del Sur a la República de Colombia. Debates congresales y soberanía municipal
Authors: Cabrera Hanna Santiago
Published: June 2018

Esta contribución considera la incorporación del Distrito del Sur a Colombia. En primer lugar, se estudian los debates en el Congreso de Cúcuta sobre la definición territorial de la república, cuya base fue el recorte territorial del Virreinato de Nueva Granada, una entidad política de Antiguo Régimen que integraba tres audiencias y una capitanía general. En segundo lugar, se analiza el pronunciamiento de asociación a la república de Colombia, suscrito por el cabildo ampliado de la ciudad de Quito, en representación de todo el territorio. En ambos episodios, el problema de la representación política es el trasfondo sobre el cual se buscó establecer el tránsito de las múltiples soberanías locales (expresadas por los municipios) hacia la soberanía unitaria de la nación (materializada en el cuerpo legislativo).
Matthew Gandy. The Fabric of Space: Water, Modernity, and the Urban Imagination.
Authors: McNeill John Robert
Published: June 2018

Matthew Gandy is a geographer at University College London whose work focuses on cities, how they work, and how their workings are represented in art and literature. His first book, entitled Concrete and Clay (2002), about New York, won a prize. Since its appearance, he has published dozens of articles and several edited books, and his output has earned him election to the British Academy. This latest book concerns six big cities at various points in their recent history: Paris, Berlin, Lagos, Mumbai, Los Angeles, and London.
Gamma-diversity partitioning of gobiid fishes (Teleostei: Gobiidae) ensemble along of Eastern Tropical Pacific: biological inventory, latitudinal variation and species turnover v1
Authors: Valencia Omar
Published: June 2018

Evaluation of β-diversity partitioning in its spatial species turnover (BJTU) and nestedness (BJNE) components along a latitudinal gradient across.
Gamma-diversity partitioning of gobiid fishes (Teleostei: Gobiidae) ensemble along of Eastern Tropical Pacific: biological inventory, latitudinal variation and species turnover v1
Authors: Valencia Omar
Published: June 2018

Evaluation of β-diversity partitioning in its spatial turnover (BJTU) and nestedness (BJNE) components along a latitudinal gradient across biogeographic provinces.
Nonlinear Concave Spiral Autowaves in Active Media, Transferring Energy, Their Application in Biology and Medicine
Authors: Mazurov M.E.
Published: June 2018

The paper reviews the works devoted to convex spiral autowaves, which are widely known. Recently a new type of autowaves has been discovered - concave autowaves, they propagate from the periphery of active media to the center and are capable of transfering energy. It is proved that concave spiral autowaves can exist in specific inhomogeneous active media. Their existence is confirmed by computational experiments. It is established that concave autowaves are widespread in nature. The article gives a more detailed review of the biological and medical applications of spiral concave autowaves, it is also known that there are many of them in physics, chemistry, hydrodynamics, meteorology, and space. Concave spiral autowaves, carrying energy, are one of the essential tools of self-organization.
FOLKLORE FORMULAE OF UKRAINIAN WEDDING SONGS’ TEXTS
Authors: SVYSCH NATALYA
Published: June 2018

The present article researches the functioning of the formulaic diction in the Ukrainian wedding songs’ texts. It investigates the underlying mythological and ritual basis that caused the emergence of the textual component as it preserved in contemporary Ukrainian folklore. Textual sources analyzed in the article are the most relevant for the purposes of the current investigation as they were transcribed immediately from the alive performance as early as in the XIX century by prominent pioneers of scientific folkloristic and ethnography Zorian Dolenga-Chodakowky, Stepan Rudansky and others. The notion of formulae accepted in the present study regards the formula as any word or words’ combination that has stable mythological and ritual meaning and is common in the poetical diction of certain nation. Thus a series of poetical formulae were discovered in the texts of the Ukrainian traditional wedding songs. They concern mainly the following thematic groups: people, human body parts, birds of the upper world, animals of the middle world, animal of the nether world, natural objects, and artificial objects (many of the latter execute special symbolic functions in the wedding rite itself).
A one-year study of cholelithiasis at a tertiary care hospital of South India
Authors: Rachamalla Ramalinga Reddy , Markapuram Kishore Kumar , Satish Sreeram
Published: June 2018

Background: Gall stone disease is a chronic recurrent disease of hepatobiliary system characterised by formation of gall stones due to impaired metabolism of bile acids, cholesterol and bilirubin. The prevalence of cholelithiasis is variable and has been reported as 2-29% in India with differences in interstate and interregions. The objective of the present study was mainly focuses on the total clinical study with surgical management and their outcome.Methods: A prospective study for a period of one year was done after approval from ethical committee. The socio-demographic factors, clinical history, physical examination, laboratory investigations with ultrasound abdomen were done in all the cases. Surgical repair by Laparoscopic and open cholecystectomy was done.Results: Females were more predominant with male: female ratio of 1:1.97. Mean age of study population was 34.12±6.2 years and was more common during 5th decade of life. Pain in the hypochondrium was most common sign. Mixed stones were most common and mostly observed in cases of mixed diet. Laparoscopic cholecystectomy was most commonly performed with zero conversion rate. Wound infection was the most common post-operative complication in both the types of repair.Conclusions: To conclude, from the present study females were more commonly affected by cholelithiasis than males with a ratio of 1:1.97. Females are more prone during fertile age and reasons are multifactorial due to hormones, parity and hormonal contraceptives. Gall stone disease is more common during fourth and fifth decade of life in both males and females. Mixed diet (non-vegetarian) is associated with increased risk of developing gall stones than vegetarian diet.
Role of Carica papaya leaf extract tablets/capsules on platelet counts in cases of dengue thrombocytopenia
Authors: K. Venugopal , R. M. Suresh , B. R. Halesha
Published: June 2018

Background: Thrombocytopenia is the hallmark laboratory finding in dengue fever and leads to bleeding manifestations when reduced markedly. So, this causes panic amongst the patient and relatives about the possibility of severity and leading to various complications including bleeding tendencies. Platelet transfusion is the only definitive treatment and it is indicated only in severe cases with bleeding manifestations. Prophylactic platelet transfusion is not much useful unless it’s reduced below 10,000cells/cumm. Carica papaya leaf extract (CPLE) are believed to have some role in improving platelets and its role is unclear. Hence, this study is taken up to evaluate the role of CPLE in improving dengue thrombocytopenia.Methods: Total 500 patients were included in the study; out of which 380 were males and 120 were females. Patients of dengue fever with thrombocytopenia (Platelet count <1, 50,000 cells/cumm) matching inclusion criteria were included in the study. After the inclusion, patients were randomized into two groups. Study group and control group by simple randomization (even/odd method). The study group treated with CPLE 1100mg three times daily for five days along with symptomatic and supportive treatment. The control group was given only symptomatic and supportive treatment. The average platelet count, average duration of stay and transfusion requirement of platelets were compared using student ‘t’ test.Results: Increased platelet counts were noted early in the treated group than the controlled group. The average duration of hospital stay was 5.42±0.98 days in study group and 7.2±0.97 days in controlled group. The requirement of platelets is more in control group than study group and it was statistically significant.Conclusions: Carica papaya leaf extract tablets can be used in patients with dengue thrombocytopenia with clear advantages over control group.
Avaliando os Cursos de Licenciatura a Distância da UFMS: o que Dizem os Egressos
Authors: Rocha Patrícia Graciela , Kawamoto Kanashiro Daniela Sayuri , Noal Mirian Lange
Published: June 2018

O presente artigo apresenta as percepções dos egressos dos cursos de licenciaturas em Ciências Biológicas, Letras, Matemática e Pedagogia na modalidade a distância da UFMS formados em 2012, 2013 e 2014. O questionário on-line, composto por 46 questões distribuídas em cinco blocos, foi divulgado no grupo dos egressos em redes sociais, enviado para o e-mail pessoal dos ex-alunos e encaminhado também via Moodle. Neste estudo, consideraremos as respostas referentes às dez questões do grupo 4 - Avaliação do curso na modalidade a distância. Os resultados evidenciam que grande parte dos informantes aprova a atuação dos professores, dos tutores presenciais e a distância, avalia positivamente as aulas presenciais, os materiais didáticos, as disciplinas ofertadas, as atividades avaliativas e o uso do Moodle como ambiente virtual de aprendizagem. Apenas o item relacionado às webaulas não foi tão bem avaliado. A baixa qualidade da internet em algumas cidades e os problemas de conexão dificultam a transmissão de aulas com qualidade. Contudo, mesmo diante dessas e outras dificuldades, é preciso ressaltar o importante papel que a educação a distância vem cumprindo nos municípios do interior do estado, possibilitando a atuação de novos profissionais nas escolas, com formação específica e bastante satisfatória, na percepção dos egressos.Palavras-chave: Educação a Distância, Formação de professores, Egressos. Evaluating Distance-Learning Teacher Training Courses at UFMS: What Graduates Have to SayAbstractThis article aims to present how graduates from distance-learning teachertraining courses in Biology, Language Studies, Mathematics and Pedagogy from UFMS perceive their college education. We asked the graduates from the classes of 2012, 2013 and 2014 to answer a 5-part 46-question on-line survey through their social media, e-mail or Moodle. In this study, we considered only the responses for the 10 questions from part four of the survey, called "Evaluating the Distance Learning Course". The results show that a large group of the informants approve of teacher and tutor performance and evaluate positively the on-site classes, the learning material, the subjects offered, the assessment testing and Moodle as a learning management system. The informants did not evaluate so well the classes through videoconference technology, which can be explained by the low quality internet connection in some cities and other technical problems that may have troubled the classes. Nevertheless, despite these and other problems in the courses, we need to emphasize the important role distance learning education has played in taking higher education to countryside cities and making it possible to have qualified professionals working in their schools, with specific and satisfactory academic training, according to the own graduates.Keywords: Distance learning education, Teacher training, Graduates.
COME ALONG WITH ME: LINKING LGBTQ YOUTH TO SUPPORTIVE RESOURCES
Authors: Wolowic Jennifer M. , Sullivan Richard , Valdez Cheryl Ann B. , Porta Carolyn M. , Eisenberg Marla
Published: June 2018

In this study, we examine how lesbian, gay, bisexual, transgender, and queer (LGBTQ) youth, who tend to experience greater feelings of isolation and discrimination than heterosexual youth, find and become integrated into supportive activities and resources. As part of a larger study on supportive lesbian, gay, bisexual, transgender, and queer youth environments, 66 go-along interviews with LGBTQ youth, from Massachusetts, Minnesota, and British Columbia were conducted. Analysis of these interviews identified important cues that prompt self-agency and integration into supportive environments and affirmative identities. In particular, we argue indirect links or cues such as media and print advertisements increase awareness of supports and resources, while personal links, such as referrals from trusted friends, adults, and regularly attended programs, can help youth form denser networks of support.
TYMS 2R3R polymorphism and DPYD [IVS]14+1G>A mutation genes in Mexican colorectal cancer patients
Authors: Gallegos-Arreola Martha Patricia , Zúñiga-González Guillermo Moises , Sánchez-López Josefina Yoaly , Naranjo-Cruz Alondra Yeraldi , Peralta-Leal Valeria , Figuera Luis E , Puebla-Pérez Ana María , Ronquillo-Carreón Carlos Alberto , Puebla-Mora Ana Graciela
Published: June 2018

Objetive: To examine the association between TYMS 2R3R polymorphism and DPYD [IVS]14+1G>A mutation by comparing healthy subjects with colorectal cancer (CRC) patients from a Mexican population. Method: The genotyping of the 2R/3R was performed by polymerase chain reaction (PCR) and -[IVS]14+1G>A mutation by real-time PCR analysis. Results: The observed frequencies of the TYMS 2R3R polymorphism and the -[IVS]14+1G>A mutation on DPYD did not indicate an increased risk for CRC (p>0.05). An association between genotype and disease was evident. The distributions of the 2R/2R genotype and hematological toxicity (adjusted OR 2.26, 95% CI 1.54-4.45, p=0.0259), heterozygous (2R/3R) with tumor stage III-IV (OR 2.4, 95% CI 1.1-4.4, p=0.035) and 2R/2R-2R/3R in non-chemotherapy response CRC patients with hematological (OR 3.11, 95% CI 1.18-8.2, p=0.035) and gastric toxicities (OR 2.3, 95% CI 1.21-4.4, p=0.014) confirmed that this factor may contribute significantly to CRC susceptibility. Conclusion: TYMS 2R3R polymorphism and the -[IVS]14+1G>A mutation on DPYD was not associated with susceptibility for CRC. However, the genotypes 2R/2R and 2R/3R of TYMS polymorphism could contribute significantly to hematological and gastric toxicity in CRC patients in this sample population.
Evidence Based Library and Information Practice (EBLIP) is Seeking an Editorial Intern
Authors: . .
Published: June 2018

No abstract.
Obesity frequency and related risk factors in primary school children
Authors: Ardıç Cüneyt , Omar Esma
Published: June 2018

Objective: The aim of this
study was to determine the obesity and overweight situations and related
factors among the children between the ages of 6-11 studying in Rize, Turkey. Methods: The study included 180 pediatric patients (86 girls and 94 boys) applying
to our policlinic, who born between 2006 and 2010. The age, height, weight and
gender of children and their parents, physical activity status of children,
frequency of convenience goods consumption, education and income status of
parents and duration of children spent on television were evaluated. Body mass
indexes of participants were measured and compared with their socio-demographic
characteristics. Results: Obesity was found in 12.2% and overweight was found in
15% of all students participating the study. While a relation was found between
being obese or overweight with gender, body mass index of parents, staying more
than 2 hours a day in front of television, fast-food consumption and low
physicial activity; no relation could be found between the educational status
of parents, time of starting supplementary food during infancy and and the
duration of total breastfeeding. Conclusions: The increase in
frequency of childhood obesity has been particularly important for identifying
risk factors associated with obesity and competing with these factors in the
early period. Family physicians, the first contact points of the patients, are
the most important part of the health system in preventing childhood obesity. A
higher prevalence of childhood obesity than other studies in the literature may
indicate that obesity will become an increasingly common problem.
Presentación
Authors: Vaillant Denise
Published: June 2018

En este nuevo número de Cuadernos de Investigación Educativa, tenemos el agrado de contar con los aportes de investigadores tanto nacionales como internacionales, que nos invitan a reflexionar críticamente y a repensar la educación que queremos.
Colaboración y uso de las TIC como factores del desarrollo profesional docente en el contexto educativo uruguayo. Protocolo de análisis para un estudio de casos múltiple
Authors: Questa-Torterolo Mariela , Rodríguez-Gómez David , Meneses Julio
Published: June 2018

La colaboración entre docentes, con o sin uso de las tecnologías de la información y la comunicación (TIC), constituye un factor determinante en su desarrollo profesional y, en consecuencia, un elemento clave para el buen funcionamiento de los centros educativos y la calidad del sistema escolar. Por este motivo, y dada la escasez de investigaciones sobre el tema en Uruguay fueron exploradas las formas que adopta la colaboración con fines profesionales y los usos de las TIC con estos fines. El diseño del estudio siguió la estrategia de estudio de caso múltiple para el que se seleccionaron cuatro escuelas primarias y cuatro centros de enseñanza secundaria en el departamento de Colonia. En cada centro se aplicó una entrevista en profundidad al director y a dos docentes identificados por sus actitudes hacia la colaboración a partir de un grupo de discusión realizado entre docentes. Asimismo se recolectaron datos del contexto y se realizaron observaciones no participantes de la infraestructura y del ambiente escolar. Los datos fueron procesados según un protocolo de análisis por capas mediante el que se describieron dos casos en detalle. Luego se buscaron patrones entre dichos casos y temas transversales. Por último se organizaron los hallazgos en una meta-matriz para mostrar los vínculos entre qué se identifica como colaboración docente, cuáles son las formas más usuales de colaboración y cuál es el rol de las TIC en el trabajo colaborativo teniendo en cuenta el contexto particular de los casos descriptos. Las principales conclusiones están asociadas al uso de los espacios de socialización y reflexión sobre las prácticas en los centros estudiados y a la manera en que los docentes y la dirección pueden aprovechar esas instancias para el intercambio sobre aspectos ligados a lo pedagógico.
O alongamento como fator interviniente na hipertrofia muscular: um estudo preliminar
Authors: Ribeiro Gustavo dos Santos
Published: June 2018

Muitas atribuições são dadas ao alongamento, contudo nem todas possuem comprovação científica. O objetivo deste estudo foi analisar os efeitos do alongamento durante o treinamento de força visando à hipertrofia muscular. A amostra do estudo foi composta por um individuo que treinou durante 16 semanas exercícios de força para M.S. e M.I. de modo unilateral, alongando os membros sinistros antes e após a sessão de treino. O resultado obtido foi um aumento na circunferência nos membros não-alongados e uma diminuição da espessura da prega cutânea no M.I. alongado, o M.S. alongado não apresentou diferença significativa com o não-alongado. Contudo mais estudos devem ser feitos para verificar os verdadeiros efeitos do alongamento no treinamento de força visando à hipertrofia.
Ácido linoléico conjugado (CLA) reduz lipídeo em músculo esquelético de ratos submetidos a treinamento de natação.
Authors: Bernardes Celene Fernandes , Gáspari Arthur Fernandes , Paulo Juliana de , Rodrigues Maria Inês , Paviotti Carolina Canova , Moura Maria José Costa Sampaio
Published: June 2018

A suplementação com ácido linoleico conjugado (CLA) tem sido relacionada com a perda de peso corporal, diminuição da massa gorda, efeitos no metabolismo de lipídeos e na taxa metabólica de repouso. O objetivo do trabalho foi avaliar a concentração de lipídeos, proteínas e glicogênio em tecidos de ratos Wistar mantidos com dieta suplementada com CLA e submetidos ao treinamento de natação. Os resultados indicaram redução de lipídeos e aumento de glicogênio no músculo esquelético. Não foram verificadas alterações nos outros parâmetros analisados em tecidos hepático, cardíaco e muscular.
Analise do impacto do ICQ e cc sobre o risco cardíaco em pessoas com baixos níveis de atividade física
Authors: Medeiros Romulo Jose Dantas , Sousa Maria do Socorro Cirilo de , Cantisani Giulliana Nobrega , Lima Anderson Carlos Lourenço de , Torres Mônica da Silveira , Silva João Marcos Ferreira de Lima , Pontes Luciano Meireles de , Oliveira Luciano Carvalho de , Batista Gilmario Ricarte
Published: June 2018

Objetivo: Analisar o impacto do índice cintura/quadril (ICQ) e circunferência da cintura (CC) sobre o risco cardíaco (RC). Material e Métodos: Estudo descritivo, transversal e quantitative, composto por uma amostra selecionada voluntariamente, na adesão as academias de ginástica de 75 mulheres (M) e 47 homens (H), media de 30,03+11,33 anos, medidos na antropometria em instrumentos calibrados. Utilizou-se SPSS 13,0 para descritiva e "t"de Student. Significancia 5% . Resultados: 42,6% e 23,4% dos H apresentam-se na faixa de RC alto e muito alto para ICQ e 40,9% e 18,2%, risco aumentado e muito aumentado para o CC, respectivamente; 28,0% e 61,3% das M apresentam-se na faixa de risco alto e muito alto para ICQ e 59,1% e 30,6%, risco aumentado e muito aumentado para o CC, respectivamente; p=0,000, diferentes entre gêneros e ICQ e CC sao de independentes (r=0,460). Conclusao: O ICQ e CC representam impacto no risco cardíaco e ambos os gêneros estão propensos a desenvolver distúrbios cardiovasculares.
Perfil antropométrico e de aptidão física de idosos participantes de grupos de convivência
Authors: Silva Júnior Arestides Pereira da , Jesus Miranda Maria Luiza de , Velardi Marilia
Published: June 2018

O presente estudo teve como objetivo analisar e comparar o perfil antropométrico e de aptidão física dos participantes dos Grupos de Convivência de Idosos, denominados "Paz e Amor" e "Amizade" do município de Marechal Cândido Rondon-PR. A amostra foi composta por 60 sujeitos, sendo 30 de cada Grupo. A análise dos dados foi realizada através de estatística, útilizando o teste t de Student independente. Os resultados da antropometria demonstraram que ambos os Grupos apresentaram resultados acima dos recomendáveis para a Organização Mundial da Saúde. Os desempenhos dos sujeitos dos dois Grupos nos testes de aptidão física corroboraram com estudos da área. Conclui-se que os Grupos comparados são semelhantes nas variáveis analisadas, provavelmente devido às características gerais da população avaliada.
AS AULAS DE EDUCAÇÃO FÍSICA NO ENSINO MEDIO: IMPLICAÇÕES NAS DISCUSSÕES SOBRE AS TEMÁTICAS APRENDIZAGEM E QUALIDADE DE VIDA
Authors: Andrade Rodrigo Castelo Branco de , Antunes Neto Joaquim
Published: June 2018

O conceito de qualidade de vida engloba vários aspectos como social, afetivo, econômico, entre outros, por se tratar de VIDA, porém o foco será sobre o aspecto SAÚDE e tentaremos relacioná-lo no interior da educação formal. Dentro do âmbito escolar, sabemos que é na etapa do ensino médio da escolarização que ocorre o aprofundamento de idéias e a reflexão mais completa sobre a ação. Através de um questionário analisamos o índice de massa corporal (do aluno e familiares), questões sobre saúde e atividade física, vendo como foi tratado e como gostariam de ser tratados tais temas durante as aulas de Educação Física. Alunos de uma escola particular do ensino médio (alunos n=20; alunas n=15) participaram do estudo. Por meio de tratamento estatístico (teste ANOVA e pós-teste de Tukey), indicamos como valor de significância p<0.05. Os resultados mostraram que a temática foi pouco explorada, e questões sobre obesidade, sedentarismo precoce e doenças crônico-degenerativas poderiam e devem ser tratadas com mais enfoque, visto os resultados e relacionando os mesmos com revisões bibliográficas pertinentes ao estudo.
A gestão esportiva de categorias de bases de basquetebol masculino em clubes da cidade de Campinas – SP
Authors: Oliveira Renato Schiavinato de , Pereira Iara Cristina de Sousa , Almeida Marco Antonio Bettine de
Published: June 2018

Observa-se na cidade de Campinas que, nos últimos cinco anos, as equipes masculinas adultas de basquetebol não participam dos campeonatos promovidos pela Federação Paulista de Basketball (FPB). Frente a este quadro pode-se deduzir que existam problemas na estrutura organizacional do basquetebol no caso destacado, focando-se a questão na formação inicial dos atletas. A partir disto, objetivamos no presente estudo de caso analisar o caráter da gestão das categorias de base masculinas da modalidade basquetebol em clubes da referida cidade, baseando-se no quadro sobre as características da Gestão Amadorista e Profissional desenvolvido por Melo Neto 1998, apud Azevedo, 2004). Após análise interpretativa das respostas obtidas, foi possível inferir que existe uma gestão hibrida nos clubes, tendendo à Amadorista.
A Robust Model To Simulate Dolomite-Matrix Acidizing
Authors: Ali M. T. , Nasr-El-Din H. A.
Published: June 2018

The two-scale model for simulating carbonate acidizing has gained substantial attention recently. Five studies dealt with matching experimental data studying regular acid. Four studies considered limestone samples, while the fifth examined one dolomite core with face dissolution. The previous work only considered the pore volume (PV) to breakthrough (PVBT) to match experimental results. Researchers assumed linear kinetics for hydrochloric acid (HCl) carbonate reaction and relied on changing Carman-Kozeny exponents to match experimental data.

Unlike previous studies, experiments were performed on 6-in.-long and 1.5-in.-diameter vuggy-dolomite cores at two sets of temperatures (150 and 200°F) and acid concentrations (15 and 20 wt% HCl). Computed tomography (CT) was used to scan the cores when dry, wet, and after acidizing. Porosity distribution calculated from the dry and wet scans was used to build a rectangular model with the cylindrical core inscribed inside. Nonlinear reaction kinetics were applied. The acid-reaction rate and diffusion coefficient were modified on the basis of X-ray-fluorescence (XRF) results and effluent chemical analysis. Wormhole 3D shape and experimental PVBT were used to assess the quality of model results.

The tuned model was used to simulate a hypothetical 18-in. core as well as large-scale radial experiments to assess its prediction capabilities, and finally the model was used to predict the dolomite-acidizing performance under field conditions.

The simulation runs emphasize that the exclusion of the wormhole shape and branching from the matching process results in an unrealistic match. It is important to simulate the cylindrical shape of the core using the actual porosity distribution to capture the wormhole growth, which is increasingly important when the wormhole propagates near the core perimeter. The present study highlights that matching parameters using experimental data yields a trustworthy model that matches both PVBT and wormhole spatial propagation. Accordingly, there is no need for excessively changing the Carman-Kozeny correlation exponents to match the dolomite-acidizing experiments.

The current model accurately matches the wormhole propagation inside the core along with the PVBT. This model can be tuned using a few acidizing experiments and then can be used to generate an acid-efficiency curve with a high degree of confidence, thus avoiding the extra experimental cost.

The current model was able to match two sets of experiments and follow the experimental trend of longer cores and large-scale radial experiments. It was used to predict acid performance under field conditions. The results show that the optimal PVBT under field conditions is always lower than the one predicted under laboratory conditions; the acid depth of penetration has a significant effect on the acid-efficiency curves; and the vertical flow of acid should be considered in acid-job design.
Predicting Breakdown Pressure and Breakdown Cycle in Cyclic Fracturing
Authors: Sakhaee-Pour A.. , Agrawal Abhishek
Published: June 2018

In hydraulic fracturing, large volumes of fluid and sand are injected into the formation to enhance its transport properties. In conventional fracturing, the fluid pressure is increased monotonically to reach failure in a single cycle. The breakdown pressure can be reduced if we increase and decrease the fluid pressure cyclically (cyclic fracturing). This phenomenon has been tested in other engineering fields, but it is not yet possible to predict the breakdown pressure and cycle in petroleum engineering in the context of hydraulic fracturing. In the present study, we propose a workflow that is based on a modified Paris law to predict the breakdown pressure and the number of cycles in cyclic fracturing. The modified Paris law is based on linear-elastic fracture mechanics (LEFM), which treats the solid domain as an isotropic and linear-elastic medium. We use the data available in the literature for dry Tennessee Sandstone. The samples were hydraulically fractured under triaxial stress, two with conventional and two with cyclic methods. The results show that the tuned Paris law can predict the breakdown pressure and cycle with a good accuracy. The tuned model can help us to design an optimal scenario that is fundamentally different from the conventional method for formation stimulation.
Theoretical and Experimental Investigation of Coiled-Tubing Deformation Under Multiaxial Cyclic Loading
Authors: Zhao Chong , Yu Guijie , Chi Jianwei , Zhang Jiaxing , Guo Zhuang
Published: June 2018

Coiled tubing is continuous thin-walled steel tubing several thousands of meters in length without screwed connections. Cyclic plastic-bending deformation occurs during tubing spooling on the reel and when passing through the gooseneck arc guide. The coupling effect of cyclic plastic bending and internal pressure causes coiled-tubing diametral growth and wall thinning (referred to as ratcheting). This paper presents a numerical algorithm to calculate the deformations of the diameter and wall thickness on the basis of the incremental plasticity theory and the principle of virtual work. It is shown that predictions with the algorithm correlate well with experimental results.
Analysis and Compensation About Temperature Influence to Optical-Fiber Gyro Zero Bias
Authors: Haiyuan Zhou , Heng Yang , Qianxue Wang , Xinming Liu , Liang Pan
Published: June 2018

Compared to other gyro the dynamic performance of optical-fiber gyro was better and the price was cheap. Optical-fiber gyro was suit to build SINS. By the way, zero bias of optical-fiber gyro was sensitive to temperature, and the compensation technique was a hot point in INS research. According to the above situation, based on one type optical-fiber gyro, the influence mechanism about temperature to optical-fiber gyro zero bias was studied, and a test method was designed, the experiment results was analyzed, finally based on multinomial simulation a compensation math model was established, and the research result discovered that temperature was a big influence to optical-fiber gyro zero bias, and it can be fixed by a compensation math model based on multinomial simulation.
Multiple Vehicle License Plate Location in Complex Background
Authors: Zhao Yaxin , Zhao Li , Li Ya
Published: June 2018

In order to expand the application range of the intelligent traffic management system, and to solve the problem that the license plate positioning accuracy is low in the changing of the scene. On the basis of the analysis of previous methods advantages and disadvantages, applying deep learning model orientation method is proposed. The image expressed as graph of graph theory. Based on the principle of minimum spanning tree preliminary separate target objects in image of vehicle. Combined with the color, dimension, texture and match the similarity to choose, search and merger area in the image, suspicious area of the license plate is obtained. Using visual word package to express rectangular profile after coarse positioning. Using support vector machine (SVM) to classify and identify rectangular area of license plate. Accurate positioning license plate location is positioned accurately. The method of accuracy is 96.4% for 135 pieces of test sample positioning, strong anti-jamming.
Quadrotor Formation Inversion Control Method Based on Unit Quaternion
Authors: Zhongsheng Wang , Sen Yang , Hairui Dong
Published: June 2018

In this paper, the formation control problem of quadrotor is studied under ideal communication condition. The quadrotor has a complex mathematical model. First, the unit quaternion method is used to describe its dynamic model and kinematic model. It is decomposed into two independent subsystems of position and attitude. The tracking error model is established by introducing the error between the ture trajectory and the desired trajectory. And then appointing a member of formation as a pilot, formation members get the geometric center position as the desired trajectory through the consistency algorithm. The back-stepping method is used to design the time-varying feedback control law for each four-rotor, so that the formation is stabilized. Finally, the effectiveness of the control method is verified by simulation experiments.
Design of University Resource Website and Security Measures in IPV6
Authors: Li Chunmei , Cui Peng , Zhou Xinke , Xiao Ze
Published: June 2018

In this paper authors introduced the overall design of learning resource sharing platform in the pure IPv6 environment, including the client and the web server and the back-end database, and the user management, the detailed design of the three aspects of resource management platform and administrator management. Finally authors introduced application of decision tree in this website.
The Comparison on the Side Feed Mode of Micro-strip Patch
Authors: Wen Dang , Xinliang Liu
Published: June 2018

The feeding of the micro-strip patch is flexible and complex, especially side feeding. In this paper, a single micro-strip patch antenna with a center frequency of 2.45GHZ is taken as an example to explore the performance of the slotted feed and non-slotted feed and verified in HFSS15.0. Combined with HFSS15.0 software simulation and theoretical calculation, the corresponding conclusions can be obtained. The theoretical value and simulation results will be shown that: the required 1/4 converter sizes of the non-slotted side feed and slotted side feed are different. By contrasting with sizes of two feeding modes, electrical size of the slotted feed is smaller. It can be known that all performances of the slotted feed are more superior.
The Extraction of Comment Information and Sentiment Analysis in Chinese Reviews
Authors: Li Danyang , Fan Huimin , Yingze Zhao
Published: June 2018

Sentiment analysis, also known as opinion mining, refers to the emotional tendencies expressed by the critics through the analysis of the content of the text. The task of text sentiment analysis mainly includes the classification of sentiment, the extraction of sentiment information and the retrieval and induction of sentiment information. Based on CRF, this paper will extract several pairs of theme words and sentiment words exist in the e-commerce review, and judge the sentiment inclination of the extracted sentiment words. The experimental results show that CRF has a good effect on the extraction of emotional information.