bluuebunny/crossref_metadata_2025_split huggingface dataset:
Indisciplina: representações sociais de uma comunidade escolar da cidade de São Paulo
Authors: Munhaes Cristina , Novaes Adelina 
Published: October 2017

Ao considerar a indisciplina escolar como um dos fatores que contribuem para provocar a exclusão, promovendo uma educação de desigualdade e falta de equidade, seja por renegar o direito do aluno, colocando-o à margem do processo educativo, seja pela pressão para que o mesmo se evada do ambiente escolar, o que é considerado crime de responsabilidade da escola e de seus profissionais, de acordo com a Legislação Brasileira. O estudo ora relatado teve por objetivo oferecer subsídios que possibilitem a reflexão sobre as práticas educativas, relações interpessoais dos profissionais da educação no enfrentamento de tal problemática, a partir de uma proposta de uma educação democrática. Tendo adotado a perspectiva psicossocial da Teoria das Representações Sociais, a pesquisa recorreu à revisão da literatura e à coleta de informações de 107 estudantes, 42 professores e 5 inspetores de alunos do Ensino Médio, de uma escola pública estadual, localizada na Região Leste da Cidade de São Paulo. Para tal, foram utilizados questionários a fim de traçar o perfil socioeconômico-cultural dos respondentes, que possibilitaram uma visão panorâmica dos sujeitos que frequentam a escola, com suas características pessoais e interesse cultural. Foram empregados também questionários que recorreram à técnica de associação livre a partir da palavra Indisciplina, combinando à da análise de conteúdo de respostas obtidas por meio questões dissertativas, com o objetivo de compreender quais são as representações sociais que os grupos elencados da comunidade escolar possuem sobre a indisciplina escolar e assim sugerir caminhos possíveis de serem trilhados no intuito de contribuir para a inclusão dos alunos rotulados como indisciplinados. Os resultados da análise das respostas dadas indicam que os grupos compartilham, em relação às representações sociais sobre a indisciplina escolar, de um elemento nuclear, o respeito às regras impostas, o que significa que não se está formando para a autonomia. Evidenciou-se com a pesquisa que as representações de disciplina (e de indisciplina) para os grupos pesquisados voltam-se para a presença da ordem, da obediência às regras, sendo estes pontos essenciais para que exista a disciplina no ambiente escolar. Contudo, o estudo também demonstrou a indisciplina escolar como um fenômeno complexo, e que muitos são os fatores que contribuem para sua ocorrência, isso se nota pelas representações tanto de professores e de inspetores, quanto de alunos, que não apontam para uma única direção.
Paro docente y representaciones sociales estudiantiles en la universidad Tucumana- Argentina.
Authors: Carreras María Paula , Torres Stöckl Cynthia María , Torres Stöckl Cynthia María , Gramajo Parache Rocío , Gramajo Parache Rocío , Cruzado Sujeros María Del Milagro , Cruzado Sujeros María Del Milagro , Cabrera Ana Gabriela , Cabrera Ana Gabriela , Jimenez Rodrigo , Jimenez Rodrigo 
Published: October 2017

El 23 de mayo del 2014, los docentes de la Universidad Nacional de Tucumán (UNT), Argentina, agremiados en la Asociación de Docentes e Investigadores de la Universidad Nacional de Tucumán (ADIUNT) dispusieron, en una asamblea, un paro por tiempo indeterminado. Esta suspensión de las actividades laborales se realizó inicialmente como una forma de protesta en reclamo a la recomposición y mejora salarial. Este trabajo realiza una aproximación a este paro docente y sus representaciones, mediante un recorte empírico obtenido en base a una muestra de 200 estudiantes (X=23,38, DE=3,90) pertenecientes a la Facultad de Psicología y Filosofía y Letras de la Universidad Nacional de Tucumán (UNT). Para cumplimentar con este objetivo se recurre a los fundamentos teóricos de la Psicología social, en especial a la Teoría de las representaciones sociales inaugurada por Moscovici (1961/1979) y a la Teoría del núcleo central promovida por Abric (1994/2001)-, rescatando la utilidad de estas contribuciones para la pesquisa de problemáticas actuales en instituciones de educación superior. Para el relevamiento de los datos se utiliza un test de evocación jerarquizada (ABRIC, 2003; VERGÉS, 1992), auto-aplicado grupalmente y para el análisis de los mismos se realizan cálculos estadísticos -mediante el auxilio de los programas IRAMUTEQ versión 0.7 alpha 2 y SPSS-, así como un examen del sentido del contenido representacional.Los principales resultados logrados indican que para los sujetos interrogados el “Paro docente” emerge como una forma de reclamo justa en el marco de una lucha por la defensa de derechos de los docentes universitarios -principalmente el derecho a un salario digno- la cual al mismo tiempo es considerada una medida perjudicial e injusta en tanto interfirió en el normal desarrollo de las actividades académicas -atentando esencialmente contra el derecho de acceso a la educación superior-, constituyendo una circunstancia atravesada por diversos conflictos, generando en consecuencia masiva preocupación y desacuerdos.
Resenha livro “Política Educacional” De: Eneida Oto Shiroma, Maria Célia Marcondes de Moraes, Olinda Evangelista.
Authors: Messora Gisele Pedroso de Almeida 
Published: October 2017

RESENHA LIVRO “POLÍTICA EDUCACIONAL”De: Eneida Oto Shiroma, Maria Célia Marcondes de Moraes, Olinda Evangelista.4. ed. Rio de Janeiro: Lamparina, 2011.
ANALISIS KEMAMPUAN KOMUNIKASI MATEMATIS MAHASISWA DALAM MENYELESAIKAN MASALAH PADA MATA KULIAH PROGRAM LINEAR
Authors: Purwati Heni , Nugroho Aryo Andri 
Published: October 2017

Komunikasi matematis merupakan salah satu kemampuan yang harus dibekalkan kepada siswa dalam pendidikan di Indonesia seperti disebutkan dalam PP Nomor 19 tahun 2005 tentang Standar Nasional Pendidikan. Hasil observasi dan wawancara dengan dosen mata kuliah program linear dibutuhkan kemampuan komunikasi matematis dalam menyelesaikannya. Subjek dalam penelitian ini ialah mahasiswa Pendidikan Matematika Universitas PGRI Semarang yang sedang mengambil mata kuliah program linear dan subyek dalam penelitian ini berjumlah 3. Teknik pengumpulan data menggunakan metode dokumentasi, observasi, dan wawancara mendalam. Teknik analisis data menggunakan model analisis interaksi, dimana komponen reduksi sajian data dilakukan bersamaan dengan proses pengumpulan data. Setelah data terkumpul, ketiga komponen dianalisis secara interaksi. Hasil yang diperoleh dari hasil triangulasi diperoleh kesimpulan bahwa subyek 3 mempunyai komunikasi matematis yang baik yang terlihat pada tingkat kemampuan pemecahan masalah yang baik pula yaitu kemampuan pemahaman masalah, perencanaan penyelesaian masalah, pelaksanaan perencanaan masalah serta kemampuan memeriksa kembali. Sedangkan subyek 1 dan subyek 2 mempunyai komunikasi matematis yang cukup baik yang terlihat pada tingkat kemampuan pemecahan masalah yang kurang sempurna yaitu kurang dapat melakukan peninjauan kembali terhadap hasil pekerjaannya.
PENERAPAN PERMAINAN SALDERMATH ALGEBRA DALAM PELAJARAN MATEMATIKA SISWA KELAS VII SMP DI KARAWANG
Authors: Hakim Dori Lukman 
Published: October 2017

Penelitian ini merupakan penelitian eksperimen dengan metode quasi exsperimental dengan menggunakan desain kelompok kontrol non ekuivalen, yang bertujuan untuk melihat perbedaan, peningkatan, dan perbedaan peningkatan, dari kelas eksperimen pembelajaran dengan penggunaan saldermath algebra dan kelas kontrol dengan pembelajaran konvensional. Populasi penelitian merupakan seluruh siswa kelas VII di SMP Rawamerta sebanyak 75 siswa, diambil sampel sebanyak 75 siswa dengan cara Cluster Sampling. Instrumen penelitian menggunakan tes uraian kemampuan aljabar, dan di analisis dengan menggunakan uji-T, uji Mann-Whitney dan uji Gain. Dari hasil penelitian diperoleh beberapa kesimpulan antara lain, pencapaian kemampuan aljabar siswa yang pembelajarannya menerapkan permainan Saldermath Agebra berbeda dengan kemampuan aljabar siswa yang menggunakan pembelajaran langsung secara keseluruhan dan pengelompokan kemampuan awal matematis siswa. Peningkatan kemampuan aljabar siswa yang pembelajarannya menerapkan permainan Saldermath Agebra lebih tinggi dibandingkan dengan kemampuan aljabar siswa yang menggunakan pembelajaran langsung secara keseluruhan sama halnya berdasarkan pengelompokan kemampuan awal matematis siswa kelompok tinggi dan kelompok sedang, akan tetapi peningkatannya tidak lebih tinggi berdasarkan kelompok rendah. Kemudian minat belajar matematis siswa sebelum dan sesudah pembelajaran menerapkan permainan Saldermath Agebra berbeda.
Effects of TiB2 nanoparticle content on the microstructure and mechanical properties of aluminum matrix nanocomposites
Authors: Kandemir Sinan 
Published: October 2017

Abstract
The present work reports the fabrication of A357 alloy matrix nanocomposites reinforced with 0.5, 1.0 and 2.0 wt.-% TiB2nanoparticles (20–30 nm) by a novel method which is the combination of semi-solid mechanical mixing and ultrasonic dispersion of nanoparticles in liquid state. The microstructural and mechanical properties of the fabricated nanocomposites were investigated. The microstructural studies conducted with optical and advanced electron microscopes indicated that reasonably effective deagglomeration and uniform distribution of TiB2 nanoparticles into the matrix were achieved. Transmission electron microscopy studies also confirmed that the nanoparticles were embedded into the matrix and a good bonding was obtained between the matrix and the reinforcement. Increasing nanoparticle content led to grain refinement and significant enhancement in the mechanical properties of nanocomposites. The addition of 0.5, 1.0, and 2.0 wt.-% TiB2 nanoparticles increased the 0.2 % proof stress of matrix alloy by approximately 31, 48 and 61 %, respectively. The contribution of different mechanisms to the strength enhancement is discussed. It is proposed that the strengthening is mainly due to Orowan mechanism and dislocation generation effect by the coefficient of thermal expansion mismatch between the TiB2 nanoparticles and the matrix.
Effect of isothermal quenching on microstructure and properties of a forged and unforged Fe-B cast alloy
Authors: Zhang Jianjun , Liao Huimin , Ma Sude 
Published: October 2017

Abstract
The effect of isothermal quenching on microstructure and properties of forged and unforged Fe-B cast alloy were investigated in this paper. The prepared samples were analyzed using scanning electron microscope (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The results show that, after isothermal quenching, the matrix transforms into lower bainite, but the morphology of boride remains nearly unchanged compared with its as-cast condition. Compared with water quenching, the hardness of forged and unforged samples after isothermal quenching is lower than the hardness of that after water quenching. The impact toughness of forged and unforged samples after isothermal quenching is higher than after water quenching. In two-body abrasion test, the wear resistance of forged and unforged samples after isothermal quenching is lower than that of forged and unforged samples after water quenching. In three-body abrasion test, the wear resistance of forged and unforged samples after isothermal quenching shows opposite behavior and is higher than that of forged and unforged samples after water quenching.
Abrasive wear and frictional behavior of polyoxymethylen
Authors: Kahraman Funda , Esme Uğur , Kulekci Mustafa Kemal , Ocalir Seref 
Published: October 2017

Abstract
In the present study, abrasive wear and frictional behaviors of polyoxymethylene were investigated experimentally. To realize this, a test apparatus was designed and fabricated. Wear tests were carried out under dry conditions at room temperature. A central composite design was used to describe response and to estimate the parameters in the model. An empirical model had been developed to predict wear loss as a function of applied load and sliding distance. Friction coefficient decreases with increase in applied load. On the other hand, it is also found that friction coefficient increases with the increase in sliding velocity.
Effect of La doping on crystalline orientation, microstructure and dielectric properties of PZT thin films
Authors: Xu Wencai , Li Qi , Yin Zhifu , Wang Xing , Zou Helin 
Published: October 2017

Abstract
Lanthanum (La)-modified lead zirconate titanate (PLZT) thin films with doping concentration from 0 to 5 at.-% have been fabricated by sol-gel methods to investigate the effects of La doping on crystalline orientation, microstructure and dielectric properties of the modified films. The characterization of PLZT thin films were performed by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and precision impedance analysis. XRD analysis showed that PLZT films with La doping concentration below 4 at.-% exhibited (100) preferred orientation. SEM results indicated that PLZT films presented dense and columnar microstructures when La doping concentration was less than 3 at.-%, while the others showed columnar microstructures only at the bottom of the cross section. The maximum dielectric constant (1502.59 at 100 Hz) was obtained in a 2 at.-% La-doped film, which increased by 53.9 % compared with undoped film. Without introducing a seed layer, (100) oriented PLZT thin films were prepared by using conventional heat treatment process and adjusting La doping concentration.
Identification of the damage degree of concrete with different water cement ratios using the acousto-ultrasonic technique
Authors: Yan Wang , Lu Ge , Jie Chen Shi , Ting Zhang Ting , Li Zhou 
Published: October 2017

Abstract
In order to study the effect of water cement ratio on the damage degree of concrete at different stress levels, the acoustic and acousto-ultrasonic characteristics of concrete with different water cement ratio under multi-stage loading were analyzed. It was concluded that with the increase of the damage degree of concrete, the damage variable and the third harmonic ratio increased, while the acousto-ultrasonic velocity and acousto-ultrasonic energy decreased. Among them, the third harmonic ratio was the most sensitive parameter affecting the damage degree. The compressive strength of concrete decreased with the increase of water cement ratio, and they were linearly related. Furthermore, with the increase of the stress level or the increase of the water cement ratio, the damage of concrete occurred during the holding period increased.
ANN surface roughness prediction of AZ91D magnesium alloys in the turning process
Authors: Buldum Berat Barış , Şık Aydın , Akdağlı Ali , Biçer Mustafa Berkan , Aldaş Kemal , Özkul İskender 
Published: October 2017

Abstract
This contribution presents an approach for the modeling and prediction of surface roughness in the turning of AZ91D magnesium alloys using an artificial neural network. The experiments were conducted with CCGT, DCGT and VCGT cutting tools under minimum quantity lubrication and dry machining conditions. AZ91D alloys were machined at different cutting speeds and feed rates, and the depth of cut was kept constant. 15 out of 18 experimental data points were used for the training of the artificial neural network model and the remaining 3 were used for the testing process. The average percentage error was calculated as 0.000815 % and 0.663 % for training and testing, respectively. The model and target results were found to have extremely low error rates.
Phase diagram, thermodynamic investigations, and modelling of systems relevant to lithium-ion batteries
Authors: Fürtauer Siegfried , Li Dajian , Henriques David , Beutl Alexander , Giel Hans , Cupid Damian , Markus Thorsten , Flandorfer Hans 
Published: October 2017

AbstractThis article reports on two consecutive joint projects titled “Experimental Thermodynamics and Phase Relations of New Electrode Materials for Lithium-Ion Batteries”, which were performed in the framework of the WenDeLIB 1473 priority program “Materials with new Design for Lithium Ion Batteries”. Hundreds of samples were synthesized using experimental techniques specifically developed to deal with highly reactive lithium and lithium-containing compounds to generate electrochemical, phase diagram and crystal structure data in the Cu–Li, Li–Sn, Li–Sb, Cu–Li–Sn, Cu–Li–Sb and selected oxide systems. The thermochemical and phase diagram data were subsequently used to develop self-consistent thermodynamic descriptions of several binary systems. In the present contribution, the experimental techniques, working procedures, results and their relevance to the development of new electrode materials for lithium ion batteries are discussed and summarized. The collaboration between the three groups has resulted in more than fifteen (15) published articles during the six-year funding period.
RETRACTED: Curcumin Exerts Effects on the Pathophysiology of Alzheimer’s Disease by Regulating PI(3,5)P2 and Transient Receptor Potential Mucolipin-1 Expression
Authors: Zhang Lu , Fang Yu , Cheng Xuan , Lian Ya-Jun , Xu Hong-liang , Zeng Zhao-Shu , Zhu Hong-can 
Published: October 2017

BackgroundTo validate our speculation that curcumin may ameliorate Alzheimer’s disease (AD) pathogenesis by regulating PI(3,5)P2 and transient receptor potential mucolipin-1 (TRPML1) expression levels.MethodsWe developed an animal model presenting AD by APP/PS1 transgenes. The mouse clonal hippocampal neuronal cell line HT-22 was treated with amyloid-β1-42 (Aβ1-42). Curcumin was administrated both in vivo and in vitro. MTS assay was used to detect cell viability, and the lysosomal [Ca2+] ion concentration was detected. The number of autophagosomes was detected by the transmission electron microscopic examination. Illumina RNA-seq was used to analyze the different expression patterns between Aβ1-42-treated cells without and with curcumin treatment. The protein level was analyzed by the Western blotting analysis. PI(3,5)P2 or TRPML1 was knocked down in HT-22 cells or in APP/PS1 transgenic mice. Morris water maze and recognition task were performed to trace the cognitive ability.ResultsCurcumin increased cell viability, decreased the number of autophagosomes, and increased lysosomal Ca2+ levels in Aβ1-42-treated HT-22 cells. Sequencing analysis identified TRPLML1 as the most significantly upregulated gene after curcumin treatment. Western blotting results also showed that TRPML1 was upregulated and mTOR/S6K signaling pathway was activated and markers of the autophagy–lysosomal system were downregulated after curcumin use in Aβ1-42-treated HT-22 cells. Knockdown of PI (3,5)P2 or TRPML1 increased the protein levels of markers of the autophagy–lysosomal system after curcumin use in Aβ1-42-treated HT-22 cells, inhibited mTOR/S6K signaling pathway, increased the protein levels of markers of the autophagy–lysosomal system after curcumin use in APP/PS1 mice. Besides, knockdown of PI(3,5)P2 or TRPML1 reversed the protective role of curcumin on memory and recognition impairments in mice with APP/PS1 transgenes.ConclusionTo some extent, it suggested that the effects of curcumin on AD pathogenesis were, at least partially, associated with PI(3,5)P2 and TRPML1 expression levels.
Explosive Chromospheric Evaporation and Warm Rain in a C3.1 Flare Observed by IRIS, Hinode/EIS, and RHESSI
Authors: Brosius Jeffrey W. , Inglis Andrew R. 
Published: October 2017

Abstract

IRIS and EIS observed a GOES C3.1 flare in stare mode on 2014 March 15. The GOES flare started at 00:21:35 and peaked at 00:26:30 UT. The IRIS slit pointed near the center of the flare, while the EIS slit pointed

to its west. About 4 minutes before the GOES flare start, the IRIS C ii and Si iv intensities became (and remained) greater than their pre-flare averages, indicating that the flare had begun and that the chromosphere and transition region were involved. IRIS first detected blueshifted Fe xxi emission at 00:22:42 UT, by which time the C ii and Si iv intensities had increased by factors around 100 and their profiles were redshifted. Simultaneous, cospatial blueshifted Fe xxi emission with redshifted C ii and Si iv emission indicates explosive chromospheric evaporation. EIS spectra reveal Fe xxiii emission that is too weak to measure velocities, and intensity enhancements by factors about 1.7 in the Fe xiv and Fe xvi emission. Lines from both of these coronal ions show redshifts ≈9 km s−1 around 00:24:00 UT, and the Fe xiv 264.7/274.2 intensity ratio reveals an increase of n

e
from

before to

cm−3 during the flare. The redshifted coronal line emission and increased n

e
are consistent with warm rain falling and accumulating in the remote area observed by EIS. A fit to the RHESSI hard X-ray spectrum yields a nonthermal energy injection rate of

erg s−1, from which we estimate a HXR beam energy flux range consistent with explosive evaporation.
Crowded Field Galaxy Photometry: Precision Colors in the CLASH Clusters
Authors: Connor Thomas , Donahue Megan , Kelson Daniel D. , Moustakas John , Coe Dan , Postman Marc , Bradley Larry D. , Koekemoer Anton M. , Melchior Peter , Umetsu Keiichi , Voit G. Mark 
Published: October 2017

Abstract
We present a new method for photometering objects in galaxy clusters. We introduce a mode-filtering technique for removing spatially variable backgrounds, improving both detection and photometric accuracy (roughly halving the scatter in the red sequence compared to previous catalogs of the same clusters). This method is based on robustly determining the distribution of background pixel values and should provide comparable improvement in photometric analysis of any crowded fields. We produce new multiwavelength catalogs for the 25 CLASH cluster fields in all 16 bandpasses from the UV through the near-IR, as well as rest-frame magnitudes. A comparison with spectroscopic values from the literature finds a

decrease in the redshift deviation from previously released CLASH photometry. This improvement in redshift precision, in combination with a detection scheme designed to maximize purity, yields a substantial upgrade in cluster member identification over the previous CLASH galaxy catalog. We construct luminosity functions for each cluster, reliably reaching depths of at least 4.5 mag below M* in every case, and deeper still in several clusters. We measure M* , α, and their redshift evolution, assuming the cluster populations are coeval, and find little to no evolution of

, and M* values consistent with passive evolution. We present a catalog of galaxy photometry, photometric and spectroscopic redshifts, and rest-frame photometry for the full fields of view of all 25 CLASH clusters. Not only will our new photometric catalogs enable new studies of the properties of CLASH clusters, but mode-filtering techniques, such as those presented here, should greatly enhance the data quality of future photometric surveys of crowded fields.