bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analisis Struktur Kognitif Siswa Kelas IV Sekolah Dasar dalam Menyelesaikan Masalah Pembagian Bilangan Bulat
Authors: Kusumadewi Rida Fironika , Kusmaryono Imam , Lail Ibnu Jamalul , Saputro Bagus Ardi 
Published: August 2019

Pembelajaran yang lebih ditekankan pada prosedur dan hasil dalam penyelesaian masalah tidak akan mengaktifkan strukur kognitif (berpikir) siswa dan tidak meningkatkan kemampuan berpikir matematis. Siswa hanya akan meniru prosedur yang dilakukan guru. Penelitian ini merupakan studi kasus pembelajaran matematika di kelas IV sekolah dasar pada materi pembagian bilangan bulat. Tujuan penelitian adalah mendeskripsikan struktur kognitif siswa dalam menyelesaikan masalah. Penelitian menggunakan metode kombinasi (kualitatif-kuantitatif) dengan desain concurrent embedded. Teknik pengumpulan data dilakukan secara trianggulasi yaitu observasi partisipan, wawancara yang mendalam, serta studi dokumentasi. Hasil penelitian menunjukkan bahwa struktur kognitif Siswa A memiliki struktur kognitif komparatif dan siswa B memiliki struktur kognitif penalaran logis. Siswa menggunakan struktur kognitif untuk memproses informasi dan menciptakan makna dengan cara (1) membuat koneksi, (2) menemukan pola, (3) mengidentifikasi aturan, dan (4) mengabstraksikan prinsip-prinsip.
Kata kunci: struktur kognitif, berpikir matematis, bilangan bulat.

ABSTRACT

Learning that is more emphasized on procedures and results in solving problems will not activate the cognitive structure (thinking) of students and does not improve the ability to mathematical thinking. Students will only imitate the procedures performed by the teacher. This research is a case study of mathematics learning in the fourth grade of elementary school in integer division material. The research objective is to describe the cognitive structure of students in solving problems. The study uses a combination method (qualitative - quantitative) with concurrent embedded design. The data collection technique is done in triangulation, namely participant observation, in-depth interviews, and documentation studies. The results showed that the cognitive structure of class IV students reached the level of comparative cognitive structure (group A) and cognitive structure of logical reasoning (group B). Students use cognitive structures to process information and create meaning by (1) making connections, (2) finding patterns, (3) identifying rules, and (4) abstracting principles
Keywords: cognitive structure, mathematical thinking, integers.
William Baker. Pinter’s World: Relationships, Obsessions, and Artistic Endeavors.
Authors: Chiasson Basil 
Published: August 2019

An appreciation of Harold Pinter that looks beyond the plays to consider Pinter’s relationships, interests and activities, and artistic tastes and influences. It is aimed at enthusiasts, scholars – students, instructors, and researchers – and non-experts. Its chief merits are its engagement with archival material and interviews and its introduction of new empirical findings.
Synthesis of La2(Zr0.7Ce0.3)2O7 nanopowder using a simple chemical precipitation method and heat treatment at high temperature
Authors: Taleghani Pejman Rezaei , Valefi Zia , Ehsani Naser 
Published: August 2019

AbstractLa2(Zr0.7Ce0.3)2O7 ultrafine powder was prepared via a precipitation process using ZrOCl2.8H2O, Ce(NO3)3.6H2O, and La2O3 precursors. The thermal behavior, phase structure, particle size, and morphology of the nanostructured precipitate and the calcined powders were investigated. The thermal analysis results of the nanostructured precipitate showed that pyrolysis occurs at 600 °C. The X-ray diffraction analysis results of the calcined powders indicated that submicrometer crystalline phases of lanthanum zirconate pyrochlore and lanthanum cerate fluorite with approximately 50 % amorphous were formed at 1 100 °C. The powders calcined at 900 °C were composed of semi-crystallized nanoparticles including crystalline phases of lanthanum zirconate and cerate. The semi-crystallized nano-particles can potentially be used as raw material of new nanostructured thermal barrier coatings.
3D nanoflower-structured TiO2 photoanode for efficient photoelectrochemical water splitting
Authors: Li Xin , Li Hongxia , Dong Wei , Qin Haiying , Xi Junhua , Ji Zhenguo 
Published: August 2019

Abstract
In this study, 3-dimensional nanoflower structured TiO2 photoanodes were successfully grown onto tin oxide doped with fluorine substrates. X-ray diffraction and scanning electron microscopy were performed. The 3-dimensional TiO2 nanoflowers presented improved photoelectrochemical performance compared with a TiO2 layer. Meanwhile, TiO2 nanoflowers with 2.5 h preparation time substantially increased the production of H2 compared with the TiO2 layer. The improved performance could be ascribed to the 3-dimensional nanoflower structure with many carriers and fast reaction kinetics, which enhanced light absorption and enlarged the contact area between the photoanode and electrolyte. Moreover, this nanoflower structure with trunks connected to the FTO substrate also improved the transfer of photogenerated carriers.
A fractal analysis for the microstructures of β-SiC films
Authors: Li Bin , Chen Zhiyong , Ren Erzhou 
Published: August 2019

AbstractFractal theory is widely used to analyze the topography of surfaces; however, the relationship and characteristics of fractal dimension and microstructures of β-SiC films have not been reported. Using scanning electron microscopy and computer analysis, the microstructures of β-SiC films were evaluated; the films were prepared on AlN substrates by laser chemical vapor deposition using a diode laser and hydrido polycarbosilane as the precursor at different vacuum levels. The effect of vacuum level on the microstructure of β-SiC films was evaluated. The results show that the microstructures of β-SiC films exhibit the characteristics of fractals. Using the box counting method, the fractal dimensions of β-SiC films were calculated to be about 1.94–2.14, providing more fractal identification in evaluating the performance of films.
INVESTIGATION OF EXHAUSTING PHENOMENA OF GAS TURBINE ENGINE ON THE BASIS OF WAVELET ANALYSIS
Authors: Tkacheshak N. V. , Horbiichuk М. І. 
Published: August 2019

The method for research of a gas turbine engine (GTE) surging phenomena based on wavelet analysis was developed. GTE DG-90 was chosen for research. A wavelet decomposition of the air pressure signal was carried out using a high pressure compressor and Dobeski, Symlet, Coffle and Meyer's discrete wavelet. The advantages and disadvantages of filtering properties of these wavelets were graphically represented in the form of amplitude-frequency characteristics. Based on the results obtained, a wavelet transform parameter selection scheme based on the analysis of the frequency response of wavelet filters was constructed, and the optimum sampling time of the wavelet filtering of the investigated signal was calculated for determination of the propagation and rotational breakdown in the GTE turbocompressor. According to this scheme, among the wavelets of Dobeski, Simlet, Koefleta, and Meyer's discrete wavelet, for studying the air pressure signal at the compressor during bursting processes, the first were selected by the Dobeches and Symmetes wavelets of the 2nd order according to their filtration rate. Considering high speed and characteristics of the description of the occurrence of excite phenomena by means of a fast Fourier transform to the distribution of the wavelet coefficients of the air pressure signal by turbocompressor, for the diagnosis of unstable flows occurring in the gas path of the gas turbine trajectory (surging and rotary breakdown), the Dobeski wavelet was selected 2nd order. At the same time, to monitor the wavelet coefficients behavior, the detail of the investigated signal is necessary at the 7th level of decomposition. Thus, the obtained results allow to carry out further analysis of breakdown processes using low-order wavelets.
IMPROVEMENT OF ROD STRING DRIVE ROTATOR
Authors: Kopey B. V. , Bilyk N. D. 
Published: August 2019

At present, there is not enough literature on the study of effective methods of the pump rod cleaning from asphalt-resinous and paraffinic substances and salts using the rod string rotator. At present, no rotators have been developed that significantly reduce the wear of the sucker rod body, or can be applied to polymer composite rods.
The development of an effective rod rotor, ensuring continuous rotation of the rod string for cleaning of paraffin deposits. The choice of this method against APSD in the conditions of preserving the quality of products and implementation of normative and economic indicators in modern conditions is an important and topical issue.
The design of the rod string rotator is developed, ensuring continuous rotation of the rod string from an independent actuator. This rotator design modernization makes it possible to reduce the amount of wearable parts, ensures independence of rotation from the progress of the rocking machine, which makes it possible to rotate the column of the rod at moments when the walking beam is at the top or bottom point, the rotation is carried out smoothly and without jerks, because with a mechanical drive slight jerks (when the rod is in contact with the tubing) is possible, the ease of replacing worn parts, inspection and replacement of the drive could be implemented.
Using SolidWorks, a finite-element analysis was performed; a body and a cover are connected by means of transverse bolts with a torque, which creates a pulling force equal to 120 kN. From the data obtained, it can be seen that in attachment points of the cover to the body of the rotary screw with the help of bolts, there are slight tensions that are permissible for these materials.
An assessment of the rod string weight on the rotating body was performed. It has been established that the deformations that occur in the attachment points of the cover to the base are within the tolerance.
Thus, these improvements provide a continuous operation of the rotator to reduce paraffin deposition in the hole and reduce the wear of the rod and tubing. A finite-element analysis of the rotator is performed, which testifies to its efficiency at application of operational loads.
Book Reviews
Authors: Mendoza Marcos , Ramirez Sierra , Sohns Antonia , Souchen Alex , Hamilton Marcus , Techera Erika 
Published: August 2019

Barandiarán, Javiera. 2018. Science and Environment in Chile: The Politics of Expert Advice in a Neoliberal Democracy. Cambridge, MA: MIT Press. 284 pp. ISBN: 978-0-262-53563-2.Hoover, Elizabeth. 2017. The River Is in Us: Fighting Toxics in a Mohawk Community. Minneapolis: University of Minnesota Press. 360 pp. ISBN: 978-1-51790-303-9.McKenzie, Matthew. 2018. Breaking the Banks: Representations and Realities in New England Fisheries, 1866–1966. Amherst: University of Massachusetts Press. 224 pp. ISBN: 978-1-625-34391-8.Sarathy, Brinda, Vivien Hamilton, and Janet Farrell, eds. 2018. Inevitably Toxic: Historical Perspectives on Contamination, Exposure, and Expertise. Pittsburgh, PA: University of Pittsburgh Press. 317 pp. ISBN: 978-0-822-94531-4.Scott, James C. 2018. Against the Grain: A Deep History of the Earliest States. New Haven, CT: Yale University Press. 336 pp. ISBN: 978-0-300-24021-4.Westbrook, Vivienne, Shaun Collin, Dean Crawford and Mark Nicholls. 2018. Sharks in the Arts: From Feared to Revered. London: Routledge. 188 pp. ISBN: 978-1-138-92966-1.
Pancreatitis hipertrigliceridémica recurrente.
Authors: López Penza Patricia , Moreira Eduardo , Burghi Gastón , Olano Estela , Ruso Martínez Luis 
Published: August 2019

La pancreatitis aguda metabólica por hipertrigliceridemia es una entidad excepcional. El riesgo de desarrollarla se vincula con niveles de triglicéridos mayores de 500 mg/dl; sin correlación directa entre el nivel con la gravedad ni las complicaciones.
Se analiza el caso clínico de un paciente con pancreatitis aguda hipertrigliceridémica recurrente; la complejidad terapéutica de su manejo y el alto riesgo de mortalidad de este tipo de pancreatitis.
Hematoma duodenal traumático.
Authors: Almada Mario , Martínez José , Muniz Nicolás , Misa Ricardo 
Published: August 2019

Antecedentes: Las lesiones del duodeno se producen en alrededor del 3 al 5 % de las lesiones traumáticas abdominales. El diagnóstico es un desafío, especialmente en el traumatismo cerrado, porque la signosintomatología es inespecífica. La valoración inicial se centra en la identificación temprana de lesiones de alto grado asociadas con altas tasas de mortalidad. La mayoría de las lesiones del duodeno son de bajo grado y pueden ser de manejo conservador, pero lesiones más complejas pueden requerir cirugía. El objetivo es mostrar el caso de un paciente que presentó un hematoma duodenal traumático y su tratamiento.
Caso clínico: Paciente sexo masculino 27 años de edad ingresa por trauma abdominal contuso. Se presentó con dolor centroabdominal, náuseas y vómitos. Hemodinamia estable; exámenes de laboratorio normales. Tomografía computada (TC) abdominal mostró una obstrucción intestinal causada por un hematoma en la pared duodenal. Se realizó tratamiento conservador en base a descompresión gástrica, inhibidores de la bomba de protones intravenosa, nutrición parenteral y controles clínicos seriados, cursando una buena evolución.
Discusión: Se trata de una entidad infrecuente en los pacientes adultos. El manejo no operatorio en caso de hematoma duodenal traumático es efectivo y evita la morbimortalidad de procedimientos más complejos.
EFFECT OF EXECUTIVE COMPENSATION, REPRESENTATIVES OF FEMALE CFO, INSTITUTIONAL OWNERSHIP AND COMPANY SIZES ON TAX AGRESSIVITY MEASURES
Authors: Fen Shie , Riswandari Ernie 
Published: August 2019

Tax revenue is the main source of Indonesiaâ€™s revenue. On the other side, tax payer consider tax as an expense that should be minimized because it can reduce economic ability of companies This is the reason why companies want to do same aggressive tax planning.The purpose of this research is to analyse the effect to executive compensation, CFOs female representation, institutional ownership, and firm size on tax aggressiveness. This research used 47 sample of manufacturing firms listed in Indonesian Stock Exchange for period on 2014-2016 that acquired by purposive sampling method. The method of research analysis was used multiple regression analysis.The result of this research showed that simultaneously, executive compensation, CFOs female representation, institutional ownership, and firm size has significant effect on tax aggressiveness. Partially, executive compensation has significant effect on tax aggressiveness. While the CFOs female representation, institutional ownership, and firm size has no significant effect on tax aggressiveness.The results of this research conclude that executive compensation is one of effective to minimize tax expense. On the other way, it indicates the larger amount of executive compensation will increase the level of tax aggressiveness. Keywords: Executive compensation, CFOs female representation, institutional ownership, firm size, tax aggressiveness.
EFFECT OF KAP SUBSTITUTION AND ANNUAL REPORT DISCLOSURE ON MARKET REACTIONS
Authors: Fajar Nita Nurul , Purnomo Listiya Ike 
Published: August 2019

The purpose of this study is to find out how much the market reaction is influenced by the substitution of KAP and disclosure of annual reports in a given period. Abnormal Return is used as a measurement for market reactions while the variables used in this study are Substitution of KAP and mandatory disclosures used to measure disclosure of annual reports. The data use form of audited financial statements by an independent auditor obtained from the official IDX website www.IDX.com using a purposive sampling method based on certain criteria. Samples in this study were 16 manufacturing companies listed on the Indonesia Stock Exchange in 2012-2016. So that the total sample obtained is 80 company data. Hypothesis testing is done by using multiple linear regression data analysis techniques. Data is collected, then processed and analyzed using the SPSS 22.0 for Windows application program. The results of this study are Substitution of KAP had a significant effect while the disclosure of the annual report had no effect, but the two variables simultaneously had an effect on the market reaction.
THE EFFECT OF EARNINGS PERSISTENCE AND EARNINGS TRANSPARENCY ON COMPANY PERFORMANCE WITH CORPORATE GOVERNANCE AS MODERATING VARIABLE (Empirical Study in Manufacturing Company that Listed in Indonesia Stock Exchange in 2014-2016)
Authors: Malau Melinda 
Published: August 2019

ABSTRACTEarnings persistence and earnings transparency are an important factors in company performance. The quality of financial statement will differentiate performance between one company to another. The research purposed to analyze the effect of earnings persistence and earnings transparency on the company performance. In addition, the research purposed to analyze corporate governance as a moderating variable can strengthens the effect between earnings persistence and earnings transparency on company performance. This research using sample of 363 firms-year in 2014-2016 and applying panel data analysis. The results show that earnings persistence variable has a positive significant effect on the company performance. Earning transparency also has a positive significant effect on company performance. For corporate governance as a moderation variable strengthens the effect between earnings persistence and earning transparency to the company performance. Size and age also have a positive significant effect on company performance. Keywords: earnings persistence; earnings transparency; company performance; corporate governance.
Optimalisasi Sistem Dan Desain CCTV Pada PT Jet Teknologi Express Berbasis Cloud
Authors: Handayani Indri , Setiadi Ade , Ridwan Ade Muhamad 
Published: August 2019

CCTV adalah perangkat kamera video yang berfungsi untuk menampilkan dan merekam sebuah kejadian pada waktu dan tempat dimanapun perangkat dipasangkan. CCTV singkatan dari Closed Circuit Television. Cctv seing digunakan untuk sistem keamanan suatu tempat baik itu kantor, ruko, jalanan maupun perumahan. Perangkat ini menjadi handal ketika banyak produsen cctv yang mengeluarkan teknologi keluaran cctv terbaru. Seperti mode rekaman motion, auto line, alarm detector dan masih banyak lainnya. Maka dari itu perangkat ini bisa menjadi alat kemanan yang paling populer dijaman sekarang. Salah satu perusahaan yang menggunakan perangkat cctv sebagai penunjang keamanannya adalah PT. Jet Teknologi Express. Hampir semua agen dari perusahaan PT. Jet Teknologi Express sudah terpasang cctv. Banyak manfaat yang bisa didapatkan dari perusahaan tersebut dengan adanya cctv antara lain untuk memonitoring aktifitas karyawan, memonitoring packet dan fungsi utamanya adalah untuk keamanan agen yang tersebar di Indonesia.
Kata kunci : CCTV, PT. Jet Teknologi Express, Keamanan
Business Intelligence Viewboard iLearning Media (iMe) Dalam Pengembangan Motivasi Belajar Menggunakan Metode Simple Additive Weighting Pada SMK Pustek Serpong
Authors: Sari Herva Emilda , Adam Helmi 
Published: August 2019

Media visualisasi era digital, merupakan perkembangan signifikan pada dunia industri maupun pendidikan. Dimana dalam pengemasan hasil laporan dituntut untuk menjadi visualisasi yang dapat diterima dengan cepat, singkat, dan mampu diterima secara efisien kepada penerima informasi. Pada sektor penerapannya, pengolahan data menjadi informasi dapat ditampilkan dengan model grafik. Model grafik ini mampu membantu para penerima informasi untuk dapat menangkap berbagai informasi dengan cepat, efisien, serta memberikan informasi yang dibutuhkan untuk menentukan pengembangan keputusan kedepannya. Penggunaan business intelligence di dalam penerapan viewboard pada ilearning, mendukung terciptanya penyampaian informasi yang rumit, agar dapat dikonsumsi dan diterima dengan mudah. Pada komunikasinya, modelnya viewboard menjadi penghubung antara data dari Rinfo spreadsheet, untuk ditampilkan menjadi bentuk informasi grafik yang dapat mempermudah penerima informasi dalam peningkatan motivasi pengambilan keputusan dari informasi grafik yang ditampilkan. Pada pengolahan data menjadi informasi Rinfo spreadsheet, perhitungannya menggunakan metode Simple Additive Weighting (SAW), didalam prosesnya terdapat pembagian cluster dan pembobotan nilai. Hasilnya akan dijadikan informasi penunjang keputusan pada viewboard grafik yang ditampilkan secara menarik, akan menghasilkan sistem pengambilan keputusan dari informasi yang lebih cepat, mudah, dan efisien.
Kata Kunci: Viewboard, informasi, grafik, business intelligence
Effect of pH Change and water Temperature On Nickel Removal from Surface Water by Chemical Precipitation
Authors: Shehab Diala Wajeh 
Published: August 2019

The research aims to find relationship between indications, change of raw surface water which are: pH, temperature, and optimum doses of alum [Al2(SO4)3.14H2O] to develop a suitable mathematical equation. A series of experiments were performed under different conditions and on different seasonal circumstances to determine the effect of the previous indications on the coagulation efficiency, where we treat Qattinah lake water by Coagulation, Sedimentation then Filtration. We studied the impact of coagulant dose change with the change of pH water within the domain ( 6.5 to 8.5 ) and the percentage of nickel removal was 75 % at pH = 8 , and we studied the effect of coagulant dose change with raw water temperature change ( from 5 to 25) °C on reducing the nickel concentration where the percentage of nickel removed when the temperature 20 °C was up to 85%, and all that when the coagulant dose was 30 mg/l.
Экспериментальные и теоретические исследования физических и теплофизических характеристик центрифугированного бетона
Authors: Полевода Иван , Нехань Денис 
Published: August 2019

Цель. Определить фактические значения плотности, влажности, коэффициентов теплопроводности и удельной теплоемкости центрифугированного бетона при нагреве.
Методы. Экспериментальное определение плотности и процентного содержания воды в образцах из центрифугированного бетона до и после нагрева. Теоретические исследования коэффициентов теплопроводности и теплоемкости на основе полученных данных.
Результаты. Получены зависимости плотности бетона от температуры и местоположения в центрифугированной конструкции. Косвенно выявлена изменчивость влажности бетона по сечению центрифугированной конструкции. Для функций влажности по сечению и плотности с ростом температуры получены значения поправочных коэффициентов, которые позволяют в зависимости от свойств центрифугированной бетонной конструкции различной толщины в целом определять эти показатели на каждой заданной ее точке. Теоретически получены значения коэффициентов теплопроводности и удельной теплоемкости для центрифугированного бетона.
Область применения исследований. Результаты исследования могут быть использованы для решения теплотехнических задач расчета огнестойкости вышеуказанных конструкций.
Методика ранжирования организаций в интересах гражданской обороны с использованием метода анализа иерархий
Authors: Ласута Геннадий , Карпиленя Николай , Булва Александр 
Published: August 2019

Цель. Разработать методику ранжирования организаций в интересах гражданской обороны.
Методы. Исследование выполнялось с использованием метода анализа иерархии.
Результаты. Разработана методика ранжирования организаций в интересах гражданской обороны, построена иерархическая структура ранжирования и выполнен ее анализ. Введены такие понятия, как «ранг организации гражданской обороны», «ранжирование организаций в интересах гражданской обороны», «уровень значимости организации гражданской обороны», сформулирован порядок их качественного и количественного определения. Разработан алгоритм анализа входных данных с использованием Microsoft Excel.
Область применения исследований. Результаты исследования могут быть использованы для реализации дифференцированного подхода при разработке мероприятий и планов гражданской обороны.