bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical computation and improvement of aerodynamic radiation noises of pantographs
Authors: Wu Jin-mei 
Published: August 2017

This paper studied the aerodynamic characteristics of cylinder and pantograph based on large eddy simulation and the acoustic boundary element method, compared sound pressure levels of different observation points and adopted measures to reduce radiation noises. Pressure distributions on the upper and lower surfaces of the cylinder were symmetrical, and radiation noises were basically the same too. Sound pressure level in the front of the cylinder was more than that on the upper and lower surfaces of the cylinder. Sound pressure level at the back of the cylinder was the maximum. With the increase of the computational time, shedding vortexes gradually developed backwards, and the influence area was bigger. The radius of radiation sound field of the cylinder was obviously reduced after applying porous materials. Additionally, contours for noise were highly symmetrical in the whole analyzed frequency band. At 2000 Hz, the cylinder presented the obvious characteristics of dipole noise source. The aerodynamic drag and lift of pantographs through numerical computation were similar to experimental results and increased with the increase of flow velocity, which showed that the computational model for the aerodynamic characteristics of pantographs in this paper was effective. Pressure was large in the area close to the pantograph head, in the connection position between upper and lower pull rods and near the base. Long dragged airflow was formed at the pantograph head, upper and lower pull rods and at the back of the base, which had a serious influence on the distribution of aerodynamic noises of pantographs. Obvious shedding vortexes were formed in the area far away from the pantograph rather than near the pantograph. The density and strength of shedding vortexes were not large. Sound pressure levels of observation points which had the same distance from the center of pantograph base were basically the same in change trend, value and peak frequency. However, the sound pressure level of observation points around the pantograph head was obviously greater than that of other observation points when the analyzed frequency was over 1000 Hz. Radiation noises in the connection position between upper and lower pull rods were greater than that of other observation points. With the increase of the analyzed frequency, the dispersive-ness of aerodynamic noises of pantographs was increasingly obvious. The radiation noise of pantographs was mainly spread along the inclined plane of 45°. When a layer of porous materials was covered on the surface of pantographs, the influence area of radiation noises was obviously reduced. In addition, the sound pressure level of radiation noises was improved.
Assessing pre-adsorption time impact on ultrafiltration performance for surface water treatment
Authors: Gui Bo , Zhao Qingqing , Liu Junxia , Wang Zhihong , Chu Huaqiang , Dong Bingzhi , Bie Chujun , Jia Fan , Tian Jing 
Published: August 2017

Abstract
This study was to assess the effect of powdered activated carbon (PAC) pre-adsorption time on ultrafiltration performance for surface water treatment. Experimental results demonstrated that membrane fouling could be mitigated by extending the pre-adsorption time. The molecular weight (MW) distribution of water samples was determined by liquid chromatography – organic carbon detector (LC-OCD) and results showed that the mechanism of PAC controlling fouling was attributed to a decrease in the low molecular weight (LMW) fraction of raw water via extending the pre-adsorption time. Fouling indexes (FIs) were used to evaluate membrane fouling potential and the results showed that polysaccharides (PS) and proteins (PN) were greatly responsible for membrane fouling. Therefore, prolonging the PAC pre-adsorption time and decreasing the PS and PN content in raw water are the main measurement for the alleviation of membrane fouling when PAC is used as the pretreatment in waterworks.
O ensino do léxico no livro didático
Authors: Silva Alba Valéria Tinoco Alves 
Published: August 2017

Este trabalho é resultante do encontro entre as reflexões e propostas de Irandé Antunes em Território das Palavras: o estudo do léxico em sala de aula (2012) e as minhas próprias concepções e crenças relativas ao ensino de língua portuguesa, oriundas da prática docente como professora de léxico e morfologia. Tal confluência de crenças concretizou-se em um projeto de pesquisa, intitulado O léxico no livro didático, desenvolvido desde 2013, com o apoio de cinco bolsistas de iniciação científica. Um dos objetivos do projeto é revisitar os estudos lexicais, desenvolvidos nas três últimas décadas, principalmente aqueles de Irandé Antunes (2012), Carlos Alexandre Gonçalves (2007); Margarida Basílio (1998; 2006), Luiz C. de A. Rocha (1998), entre outros, buscando aporte teórico relevante para repensar procedimentos didáticos voltados para o ensino do léxico e para a ampliação do vocabulário. Outro objetivo é analisar um corpus constituído de dicionários escolares e livros didáticos de língua portuguesa de ensino fundamental e médio, com o intuito de compilar propostas pertinentes de ensino do léxico. Ambos os objetivos, de certa forma, querem verificar se é verdadeira a hipótese de Antunes de que, apesar de os estudos linguísticos terem implementado uma série de inovações no ensino de língua portuguesa, principalmente no que tange ao estudo do texto e do discurso, o tratamento do léxico permanece em segundo plano. A condução das reflexões terá como estudo de caso o tratamento dado ao processo de formação de substantivos com os sufixos -inho e -ão.
Estimación de la demanda, aplicada a una innovación de tipo MEMS mediante el modelo de Bass
Authors: Nava-Jiménez Roberto , Escamilla-Santana Clara 
Published: August 2017

El avance en paralelo que han tenido la mecánica y la electrónica ha creado una nueva tecnología, conocida como de micro maquinado; lo que ha permitido hacer diseño y fabricación de estructuras eléctricas y mecánicas bajo el nombre de Sistemas microelectromecánicos. Esta tecnología de orden disruptivo tiene un potencial sobresaliente para ser empleada en los dispositivos electrónicos, que se incorporan en alguna parte de nuestro cuerpo. ¿Cómo determinar el grado de adopción de los MEMS, siendo esta la tecnología de tipo habilitadora (enabling technology) aplicada a un producto en el campo de la tecnología que se lleva puesta (wearable technology)? Este trabajo propone el uso del modelo de Bass como herramienta para definir el grado de difusión, con el cualpoder identificar la tendencia de adopción del reloj inteligente (smart watch) en distintos países del mundo y con ello una aproximación del tamaño de mercado, haciendo prospectiva en el rubro de los productos de consumo como uno de los sectores más promisorios en demanda futura, también es mostrado el efecto innovación versus imitación, siendo estos factores relevantes para la elaboración de estrategias de marketing y pronósticos de demanda en un nuevo producto.
PENGARUH PEMBELAJARAN MATEMATIKA MENGGUNAKAN STRATEGI INKUIRI TERHADAP KEMAMPUAN PEMECAHAN MASALAH MATEMATIKA
Authors: Andriani Lies 
Published: August 2017

Penelitian ini bertujuan untuk mengetahui apakah terdapat perbedaan kemampuan pemecahan masalah matematika antara mahasiswa yang belajar menggunakan strategi inkuiri dengan mahasiswa yang memperoleh pembelajaran secara konvensional pada mata kuliah Telaah Materi Matematika SMA.Penelitian ini merupakan penelitian quasi eksperimen, karena dalam desain ini peneliti tidak dapat mengontrol semua variable yang mempengaruhi jalannya eksperimen. Dalam penelitian ini, peneliti berperan langsung sebagai dosen dalam proses pembelajaran. Subjek dalam penelitian ini adalah mahasiswa kelas IVB dan mahasiswa kelas IVD Prodi Pendidikan Matematika yang berjumlah 69 orang dan objek penelitian ini adalah pemecahan masalah matematika mahasiswa. Pengambilan data dalam penelitian ini menggunakan dokumentasi, lembar observasi, dan tes. Dalam penelitian ini, pertemuan dilaksanakan selama lima kali, yaitu empat kali pertemuan dengan menggunakan strategi inkuiri dan satu pertemuan lagi dilaksanakan postes. Untuk mengetahui hasil penelitian tersebut digunakan rumus tes-t, Berdasarkan hasil analisis data tersebut, diambil kesimpulan bahwa terdapat perbedaan kemampuan pemecahan masalah matematika antara mahasiswa yang belajar menggunakan strategi inkuiri dengan mahasiswa yang memperoleh pembelajaran secara konvensional pada mata kuliah Telaah Materi Matematika SMA.
PENGARUH PENDEKATAN PEMBELAJARAN VISUAL THINKING DISERTAI AKTIVITAS QUICK ON THE DRAW UNTUK MENINGKATKAN KEMAMPUAN KOMUNIKASI MATEMATIS SISWA
Authors: Ariawan Rezi 
Published: August 2017

Penelitian ini didasarkan pada permasalahan rendahnya kemampuan komunikasi matematis siswa. Untuk mengatasi hal tersebut, dilakukan penelitian dengan menggunakan pendekatan pembelajaran Visual Thinking disertai aktivitas Quick on the Draw. Penelitian ini mengkaji masalah peningkatan kemampuan komunikasi matematis antara siswa yang mendapat pendekatan pembelajaran Visual Thinking disertai aktivitas Quick on the Draw dan pendekatan pembelajaran konvensional ditinjau dari keseluruhan siswa dan kemampuan awal matematis siswa (tinggi, sedang, dan rendah). Penelitian ini merupakan penelitian kuasi eksperimen dengan desain penelitian Nonequivalent Control Group Design menggunakan teknik Purposive Sampling. Populasi dalam penelitian ini adalah siswa kelas VIII SMP di Kota Pekanbaru Riau Tahun Pelajaran 2012/2013. Sedangkan sampel dalam penelitian ini adalah siswa kelas VIII di salah satu SMP di Kota Pekanbaru Riau. Instrumen yang digunakan dalam penelitian ini adalah tes kemampuan komunikasi matematis. Analisis kuantitatif dilakukan dengan menggunakan uji perbedaan rataan. Hasil penelitian menunjukkan bahwa: Peningkatan kemampuan komunikasi matematis siswa yang mendapat pendekatan pembelajaran Visual Thinking disertai aktivitas Quick on the Draw lebih baik daripada siswa yang mendapat pembelajaran konvensional ditinjau dari keseluruhan siswa dan kemampuan awal matematis (tinggi, sedang, dan rendah). Kata Kunci: Pendekatan Pembelajaran Visual Thinking, Aktivitas Quick on the Draw, Kemampuan Komunikasi Matematis.
VALIDITAS PERANGKAT PEMBELAJARAN MATEMATIKA BERBASIS PENEMUAN TERBIMBING
Authors: Revita Rena 
Published: August 2017

Penelitian ini bertujuan untuk mengetahui validitas perangkat pembelajaran matematika berupa Rencana Pelaksanaan Pembelajaran (RPP) dan Lembar Kegiatan Peserta Didik (LKPD) berbasis penemuan terbimbing pada materi teorema pythagoras untuk peserta didik kelas VIII SMP. Penelitian dilaksanakan di SMP Negeri 1 Ampek Angkek Sumatera Barat. Penelitian ini merupakan penelitian pengembangan yang menggunakan model Plomp. Data uji validitas tersebut diperoleh dari hasil validasi oleh para ahli dengan menggunakan instrumen lembar uji validitas berupa angket. Data yang diperoleh dianalisis dengan menggunakan skala Likert. Hasil uji validitas untuk RPP matematika berbasis penemuan terbimbing secara keseluruhan memperoleh nilai kevalidan yaitu 3,44 dengan kategori sangat valid, dan untuk LKPD berbasis penemuan terbimbing secara keseluruhan memperoleh nilai kevalidan yaitu 3,59 dengan kategori sangat valid
Hubungan Kontrol Diri dengan Perilaku Membolos Siswa
Authors: Putri Megawati Silvia , Daharnis Daharnis , Zikra Zikra 
Published: August 2017

The purpose of this research to describe self control and truant behavior students and examine the relationship between self control with the behavior of truant students. This research applied quantitative method and descriptive correlational design, with a sample of 234 students, that drawn by Propotional Stratified Random Sampling technique. The instrument of this research was a scale of Likert model. Hypothesis testing of research using the formula Pearson Product Moment Correlation with SPSS for mindows release 20.00. The results showed: (1) on average, the truant behavior of class X and XI SMA Negeri 7 Padang was 19.86 hours of lessons in 2 months, (2) on average, class X and XI SMA Negeri 7 Padang self control was 108.24 at the high category, (3) there was significant negative of self-control with truant behavior of students, with a correlation coefficient -0.289 significance level 0.000, which is smaller than 0.05. This research can be used as an analysis of the needs of students for the teacher of guidance and counseling for the manufacture of guidance and counseling services programs at SMA Negeri 7 Padang.
Hubungan Perencanaan Karier dan Efikasi Diri dengan Kesipan Kerja Mahasiswa
Authors: Latif Abdul , Yusuf A Muri , Efendi Z Mawardi 
Published: August 2017

This research was conducted by a high amount of unemployment from graduate students of university. The high amount of unemployment from graduate students of university indicated that undergraduate students had low work readiness. Career planning and self-efficacy were the factors assumed that influenced work readiness. This research was intended to describe: (1) career planning, self-efficacy, and work readiness of undergraduate students, (2) the correlation of career planning with work readiness, (3) the correlation carrier planning and self-efficacy with work readiness. This research applied correlational descriptive research with quantitative method. The population of this research was the seventh and ninth undergraduate students semester of Guidance and Counseling of UIN Suska Riau consisting of 139 undergraduate students, the sample consisted of 103 undergraduate students chosen by using proportional stratified random sampling technique. The instrument used was likert scale model. The data were analysed by using descriptive statistic, simple regression and multiple regression. The research findings indicated that: (1) career planning of undergraduate students was averagely included into good category, self-efficacy of undergraduate students was averagely included into high category, work readiness of undergraduate students was averagely included into high category, (2) there was a significant correlation between career planning with work readiness about 28,7% (R = 0,536, significance 0.000), (3) there was a significant correlation between self-efficacy with work readiness about 16.4% (R = 0.405, significance 0.000), (4) there was a significant correlation between carrier planning and self-efficacy with work readiness about 33.2% (R = 0.576, significance 0.000)
Samuel G. Armistead, El Romancero judeo-español en el Archivo Menéndez Pidal. (Catálogo-índice de romances y canciones). Cátedra-Seminario Menéndez Pidal, Madrid, 1978; 3 ts.: 387, 393, 358 pp.
Authors: Mariscal de Rhett Beatriz 
Published: August 2017

Se reseñó el libro: El Romancero judeo-español en el Archivo Menéndez Pidal. (Catálogo-índice de romances y canciones).
L'humanisme dans les lettres espagnoles. Etudes réunies et présentées par A. Redondo. Librairie Philosophique J. Vrin, Paris, 1979; 376 pp. / L'image du monde renversé et ses représentations littéraires et paralittéraires de la fin du xive siècle au milieu du xviie. Etudes réunies et présentées par J. Lafond et A. Redondo. Libraire Philosophique Vrin, Paris, 1979; 196 pp.
Authors: Joly Monique 
Published: August 2017

Se reseñaron los libros: L'humanisme dans les lettres espagnoles. Etudes réunies et présentées par A. Redondo y L'image du monde renversé et ses représentations littéraires et paralittéraires de la fin du xive siècle au milieu du xviie. Etudes réunies et présentées par J. Lafond et A. Redondo.
Francisco de Quevedo, La hora de todos y la fortuna con seso. Ed., introd. y notas de Luisa López Grigera. Castalia, Madrid, 1975; 230 pp. (Clásicos Castalia, 67). / Francisco de Quevedo, L'heure de tous et la fortune raisonable / La hora de todos y la fortuna con seso. Ed., introd., trad. et notes par J. Bourg, P. Dupont et P. Geneste. Aubier, Paris, 1980; 527 pp. (Col. bilingüe).
Authors: Jauralde Pou Pablo 
Published: August 2017

Se reseñaron los libros: La hora de todos y la fortuna con seso. Ed., introd. y notas de Luisa López Grigera, y L'heure de tous et la fortune raisonable / La hora de todos y la fortuna con seso. Ed., introd., trad. et notes par J. Bourg, P. Dupont et P. Geneste.
Perspectivas de la investigación lingüística en Hispanoamérica. Ed. J. M. Lope Blanch. UNAM, México, 1980; 140 pp.
Authors: Madrigal Mariana P. 
Published: August 2017

Se reseñó el libro: Perspectivas de la investigación lingüística en Hispanoamérica. Ed. J. M. Lope Blanch.
María Beatriz Fontanella de Weinberg, Dinámica social de un cambio lingüístico. La reestructuración de las palatales en el español bonaerense. UNAM, México, 1979; 128 pp.
Authors: Quijas Corzo Patricia 
Published: August 2017

Se reseñó el libro: Dinámica social de un cambio lingüístico : la reestructuración de las palatales en el español bonaerense.
Análise da influência dos elementos meteorológicos sobre a evapotranspiração de referência em Tauá, no Ceará
Authors: Araújo Efraim Martins , Barbosa Paula Juliana Aquino , De Oliveira Joaquim Branco , Nogueira Dijauma Honório , Arraes Francisco Dirceu Duarte 
Published: August 2017

A evapotranspiração de referência é um importante parâmetro agrometeorológico, principalmente para planejamento e manejo de irrigação e pode ser estimada por uma ampla diversidade de métodos, porém, no Nordeste brasileiro no qual as chuvas são irregulares e os recursos hídricos normalmente são contingenciados, o estudo da evapotranspiração se apresenta como uma forma de otimizar o manejo da irrigação. Este estudo teve por objetivo analisar a influência dos elementos do clima na evapotranspiração de referência calculada pela equação de Penman-Monteith FAO-56. Os dados dos elementos do clima: temperatura máxima e mínima do ar, umidade relativa, velocidade do vento e insolação de um período de 53 anos, foram cedidos pelo INMET, da cidade de Tauá no Ceará, cujo clima segundo a classificação climática de Köppen é BSw’h’; clima quente e semiárido. A evapotranspiração de referência foi calculada conforme os procedimentos sugeridos pela FAO 56. A análise de sensibilidade fundamentou-se no acréscimo e decréscimo de um elemento climático por vez em ±5% até o limite de ±40% dispostos entre -40%, -30%, -20%, -15%, -10%, -5%, +5%, +10%, +15%, +20%, +30% e +40%, mantendo-se os valores dos outros elementos constantes. Os resultados mostraram sensibilidade do modelo Penman-Monteith FAO 56 a variação dos elementos do clima nos períodos chuvoso e seco. Penman-Monteith, nas condições climáticas de Tauá, CE, é mais sensível às variações da temperatura máxima e umidade do ar, seguido de insolação, velocidade do vento e temperatura mínima do ar.
ANALISIS KUALITAS AIR DANAU SEBAGAI DASAR PERBAIKAN MANAJEMEN BUDIDAYA PERIKANAN DI DANAU BUYAN KABUPATEN BULELENG, PROVINSI BALI
Authors: Riki Saputra I Wayan Rian , Restu I Wayan , Ayu Pratiwi Made 
Published: August 2017

LAKE WATER QUALITY ANALYSIS AS A IMPROVEMENT BASIS OF AQUACULTURE MANAGEMENT IN BUYAN LAKE REGENCY OF BULELENG, BALI PROVINCE Buyan Lake is one of the lakes in Bali province. That located at Pancasari Village, District of Sukasada, Buleleng Regency. This lake they are many utilication of the lake such as agriculture, tourism and aquaculture activities. Those activities are considered to contribute an eutrophication in this lake. In order to investigate the effect of of floating net cages activity in Buyan Lake, the research about “The Analysis of Water Quality as a Basic Improvement of Aquaculture Management in Buyan Lake” was conducted This research method used in this study was done by observation method and took the samples in situ (at Buyan Lake site) and samples analysis was done by ex situ (at UPT. Laboratorium Kesehatan Propinsi Bali). They were 2 water quality parameters such as some physic parameters (temperature, clarity and turbidity) and chemistry parameters (pH, DO, ammonia, nitrate, BOD, COD, sulfide and phosphate). The data analysis of this research was analysis conducted by STORET index and pollution index (PI). Base on the analysis using STORET index, pollution status in Buyan Lake was heavily contaminated with average score of -82. The highest score was obtained in station 3 (-98). The results of pollution index showed that Buyan Lake has a lightly contamination with average score 3,4347 whereas the highest pollution index score was obtained in sation 4 (3.8673).
EVALUASI PADANG PENGGEMBALAAN ALAMI MARONGGELA DI KABUPATEN NGADA PROVINSI NUSA TENGGARA TIMUR
Authors: F. G Siba , Suarna I. W. , Suryani N. N. 
Published: August 2017

Evaluasi terhadap padang penggembalaan alami untuk memperbaiki kualitas hijauan merupakan salah satustrategi penting dalam peningkatan produksi ternak ruminansia. Penelitian ini bertujuan untuk menyediakandatabase tentang kondisi padang penggembalaan serta pengelolaan padang penggembalaan yang baik di KabupatenNgada. Kabupateng Ngada merupakan daerah yang sangat potensial bagi pengembangan ternak sapi karenamemiliki padang penggembalaan yang luas. Penelitian dilakukan di padang penggembalaan alami MaronggelaKabupaten Ngada, Provinsi Nusa Tenggara Timur, yang berlangsung selama 2 musim, yaitu pada akhir musimhujan (bulan Maret) dan akhir musim kemarau (bulan Oktober). Peubah yang diamati pada penelitian ini adalahkomposisi botani dan kualitas hijauan. Padang penggembalaan alami Maronggela didominasi oleh hijauan jenisImperata cylindrica dan Themeda aguens, produksi dan kualitas hijauan tertinggi di akhir musim hujan, sertaproduksi dan kualitas terendah di akhir musim kemarau. Daya tampung padang penggembalaan alami Maronggeladalam satu tahun adalah 1,5 satuan ternak.
Kata kunci: database, padang pengembalaan, sapi
EFEKTIVITAS SELEKSI DIMENSI TUBUH SAPI BALI INDUK
Authors: D. A. Warmadewi , Oka I G. L. , Ardika I N. 
Published: August 2017

Seleksi merupakan salah satu tindakan yang dilakukan untuk meningkatkan mutu genetik suatu populasi ternak.Respon seleksi yang terjadi tergantung pada intensitas seleksi, heritabilitas dan simpangan baku sifat yang diseleksi.Simpangan baku sifat atau performans ternak yang diseleksi akan menunjukkan keragaman (variasi) sifat tersebutdalam populasi yang dikenal dengan koefisien variasi (keragaman). Penelitian ini bertujuan untuk mengetahuikoefisien keragaman dan efisiensi respon seleksi yang terjadi, bila seleksi dilakukan pada dimensi tubuh (panjangbadan, tinggi gumba dan lingkar dada) yang didasarkan intensitas seleksi dan estimasi heritabilitas yang samaterhadap semua dimensi tubuh yang diukur. Penelitian ini dilakukan secara purposive random sampling padalima kelompok ternak di lima kecamatan di kabupaten Jembrana. Jumlah induk sapi bali yang digunakan dalampenelitian ini sebanyak 275 ekor. Variabel yang diukur adalah panjang badan, tinggi gumba dan lingkar dada. Hasilpenelitian menunjukkan rataan panjang badan, tinggi gumba dan lingkar dada sapi bali induk di lokasi tersebutberturut-turut 117,19±8,84cm; 115,12±6,35cm dan 165,43±12,54cm dengan koefisien keragamannya berturut-turut7,54%; 5,52% dan 7,58%, sedangkan respon seleksinya berturut-turut 0,60cm; 0,76cm dan 1,25cm. Kesimpulanyang dapat diambil dari hasil penelitian ini adalah respon seleksi yang paling efektif untuk peningkatan mutugenetik dimensi tubuh sapi bali betina adalah terhadap lingkar dadanya.
Kata kunci: sapi bali, seleksi, respon seleksi