bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANALYSIS OF INFILTRATION RELATIONS WITH LAND PHYSICAL PROPERTIES
Authors: Tribhuwana Awliya , Prasetyo Agung 
Published: December 2020

ABSTRACTSoil types have different infiltration rates and vary depending on the characteristics of the soil, how the infiltration relationship occurs with dry water content and saturated water content, infiltration relationship with the soil after being compacted and before compacted and how the infiltration rate of the two types of relationship and how infiltration water that happened. Soil tests are carried out in the laboratory, soil water content before and after the soil has been solidified, changes in the time of infiltration capacity with the Horton equation, rain hydrograph for overall infiltration analysis, including cumulative infiltration and runoff rates.Soils experience porosity filling not as great as in normal soil conditions, normal soil conditions changes in water content reaches 5.22 mm/hour while in soil conditions that experience changes in water content compaction at 30 minutes by 0.14 mm/hour and experiences a constant rate in the 40th minute at a rate of 0.20 mm/hour, so there is a difference in water content of 5.08 mm/hour between normal soil and soil after solidification, due to compacting it causes runoff of 8.92 mm/hour, normal soil with runoff of 3.78 mm/hour.Keyword : Â Infiltration, soil physical properties, runoff.
Hypervelocity stars: theory and observations
Authors: Tutukov A V , Dryomova G N , Dryomov V V 
Published: December 2020

Abstract
Relativistic velocity is a kinematic feature of micro-objects (elementary particles). Their application to macro objects (stars, planets, asteroids, neutron stars, and stellar-mass black holes) is currently under scientific discussion. This potential was recognized after Warren Brown discovered hypervelocity stars (HVSs) at the beginning of the 21st century. Jack Hills predicted these stars in 1988 due to the dynamical capture of a binary star by the central supermassive black hole (SMBH). The acceleration mechanism due to momentum exchange in the classical three-body problem provides the kinetic resource for HVS formation by the gravitational capture of the remaining component. The present threshold of the anomalous stellar kinematics exceeds ∼1700 km s−1 and can be reproduced by some mechanisms as alternatives to Hills’s scenario. HVSs can arise due to the collisional evolution of stellar clusters, supernova explosions in close binary stars, the orbital instability of triple stars, stellar captures from other galaxies, etc. Scenarios with the participation of black holes with masses ranging from stellar values to several billion solar masses are the most promising for the generation of anomalously high stellar velocities. Hills’s scenario has a special place in HVS studies, because, being based on the accidental capture of a binary star by the SMBH, it does not relate to the problem of the Galactic Center population. This scenario predicts self-consistent statistics of HVSs and captured stars which may be identified with S-stars. The discovery of S-stars played an essential role in studies of the Galactic Center; their dynamics have independently provided incontestable proof of the SMBH’s existence. This review briefly discusses the history of the discovery and investigation of HVSs and S-stars, provides an account of their observational statistics, and describes their modeling methods in the classical three-body and N body problems. We study the limits of the effective acceleration of stars in the classical Hills scenario and the modified mechanism that allows a change of one of the binary components to another SMBH. The acceleration acquired by the star in a mutual field of two SMBHs can produce stars with relativistic velocities (1/2 c−2/3 c). Using a self-consistent probabilistic model combining the classical and modified Hills scenarios, we predict the formation probability of HVSs in the Galaxy and of extragalactic stars with relativistic velocities. We discuss the prospects of searches for stars and asteroids with relativistic velocities by future space missions and using new knowledge about the Universe.
PERANCANGAN HRSG (HEAT RECOVERY STEAM GENERATOR) SEBAGAI PEMANAS REFRIGRANT R-134a PADA SIKLUS ORGANIC RANKINE CYCLE
Authors: Zariatin D. L. , Lesmana I. G.E. , Hartantrie R. C. , Nugroho Aditya 
Published: December 2020

Udara buang proses pirolisis masih menyimpan energi panas yang cukup tinggi dengan temperatur mencapai 800°C sehingga dapat dimanfaatkan sebagai media untuk merubah fase Refrigerant R-134a dari fase cair menjadi gas. Refrigerant R-134a yang sudah berubah menjadi gas digunakan untuk memutar turbin sebagai penggerak generator sehingga dapat menghasilkan aliran listrik dalam siklus Organic Rankine Cycle (ORC). Refrigrant R-134a tidak menyerap panas dari proses pirolisis secara langsung. Panas dari pirolisis diserap melalui siklus thermal oil kemudian digunakan untuk mengubah fasa R-134a pada Heat Recovery Steam Generator (HRSG). Desain HRSG pada penelitian ini adalah tipe sistem Heat Exchanger shell and tube. Dimana thermal oil yang memiliki suhu panas mengalir dalam shell dan refrigerant R-134a yang memiliki suhu dingin mengalir dalam Tube. Pertukaran panas terjadi ketika Refrigerant R-134a masuk ke dalam tube dan thermal oil masuk ke dalam shell. Dalam perancangan HRSG ini digunakan tiga variasi tekanan yaitu 8 bars, 10 bar, dan 12 bar. Data suhu, tekanan, diameter tube, dan mass flow rate di-input pada software HTRI Xchanger suite kemudian diproses oleh software tersebut sehingga menghasilkan output berupa laju perpindahan panas. Nilai laju perpindahan panas berturut turut sebesar turut 2,084 kJ/s, 2,622 kJ/s, dan 3,02kJ/s. Sehingga dapat disimpulkan hasil yang paling optimal berada pada tekanan 12 bar dengan nilai laju perpindahan panas sebesar 3,02 kJ/s Kata kunci: shell and tube HRSG, HTRI Xchanger suite, Organic Rankine Cycle
POTENSI LIMBAH PADI SEBAGAI SUMBER ENERGI ALTERNATIF DI PROVINSI SULAWESI TENGGARA
Authors: Sudia Budiman , Sudarsono Sudarsono , Endriatno Nanang , Samhuddin Samhuddin , Imran Al Ichlas , Aminur Aminur , Aksar Prinob 
Published: December 2020

Potentials of Rice Waste as Alternative Energy Sources in Southeast Sulawesi Province. The purpose of this study is to analyze the energy potential of rice processing waste (rice straw and rice husk) in the province of Southeast Sulawesi. Grain production data used the results of the Central Statistics Agency of Southeast Sulawesi publication as well as the Central Statistics Agency of the Regency / municipality of Southeast Sulawesi. To determine the pattern of utilization of rice processing waste at the farm level, the research team conducted a survey in several locations that produce rice in Southeast Sulawesi Province. The data used for analysis were grain production in 2010 – 2018. Based on the grain production, rice straw and rice husk production were calculated, then the energy potential of the two rice processing wastes can be determined. The results of the analysis show that the average production of rice straw was 823, 665 tons; rice husk was 119,289 tons, estimated energy potential of rice straw = 9,600GJ / year and rice husk = 1,700 GJ /year
PENGARUH VARIASI TEMPERATUR TEMPERING TERHADAP SIFAT MEKANIK DAN SIFAT FISIK BAJA AISI 1045 SEBAGAI BAHAN PISAU MESIN PENCACAH PLASTIK
Authors: Khalid Khalid , Kardiman Kardiman , Naubnome Viktor 
Published: December 2020

Pisau merupakan suatu komponen pemesinan yang digunakan untuk memotong benda menjadi potongan dan bagian. Begitu juga dengan pisau mesin pencacah plastik yang diharapkan bisa memotong plastik menjadi ukuran yang lebih kecil, dengan hasil potongan yang lebih kecil dapat memudahkan pada proses selanjutnya dan diolah menjadi produk jadi lainnya. Proses pencacahan plastik diharuskan mesin untuk bekerja terus menerus agar didapat ukuran plastik yang lebih kecil maka dari itu dilakukan peningkatan kekerasan pada material pisau pemotongnya, untuk meningkatkan material pisau pemotong dilakukan proses perlakuan panas. Perlakuan panas ini digunakan untuk meningkatkan kekerasan pada komponen pisau pemotong pada mesin pencacah plastik agar didapat kinerja pisau pemotong yang maksimal, metode perlakuan panas yang digunakan yaitu tempering dengan variasi temperatur 300°C, 400°C, dan 500°C. Data hasil pengujian kekerasan dengan metode vickers yang ditampilkan pada tabel dan grafik terlihat peningkatan kekerasan baja yang berbeda, selanjutnya dianalisa dan didapat nilai rata – rata kekerasan raw material sebesar 211 HV, kemudian baja yang ditempering dengan temperatur 300°C memiliki nilai kekerasan 257,73 HV, selanjutnya untuk tempering dengan temperatur 400°C memiliki nilai kekerasan 269,3 HV, dan untuk hasil tempering dengan temperatur 500°C memliki nilai kekerasan 250 HV. Untuk pengujian menggunakan struktur mikro terjadi perubahan struktur dari pearlite dan ferrite menjadi bainit dan martensite yang disebabkan oleh proses perlakuan panas pada spesimen uji.
Phosphocalcemic responses of vitamin D3 administered intact or hypophysectomized Heteropneustes fossilis maintained either in artificial freshwater or calcium deficient freshwater.
Authors: Kumar Ajay , Kumar Abhishek , Prasad ManiRam , Prakash Chandra , Srivastav Sunil Kumar 
Published: December 2020

The serum calcium level of vehicle injected fish (group-A) exhibits no alteration throughout the experiment. Vitamin D3 administration to fish Heteropneustes fossilis exhibited hypercalcemia from day 3 to day 7 (group-B). However hypophysectomized and vehicle injected fish showed hypocalcemia from day 3 to day 7 (group-C). While hypophysectomized and vitamin D3 injected fish exhibited hypercalcemia on day 3 till the end of experiment (group -D). The serum phosphate of group A fishes is unaltered throughout experiment. The phosphate level of vitamin D3 treated fish (group-B) exhibits hyperphosphatemia from day 3 to day 7. In group C fishes exhibited a significant decrease in phosphate level throughout the experiment. While the group D fishes showed hyperphosphatemia from day 3 to day 7. In group E fishes the serum calcium level remains unaffected up to day 3 the level decreases on day 5 to day 7. In group F fishes showed hypercalcemia from day 3 to day 7. In group H fishes a progressive decrease in serum calcium level is noticed on day 3 to day 7. The group H fishes shows increase in the serum calcium level from day 3 to day 7. The serum phosphate level of group E fishes showed a decrease from day 3 to day 5. The phosphate level increases from day 3 to day 7 in group F fishes. The phosphate level exhibited a decrease from day 3 to day 7 (group G). The phosphate level increases from day 5 to day 7 of group H fishes.
SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN SEKOLAH TERBAIK DENGAN METODE MOORA
Authors: Astuti Ermayanti , Saragih Nidia Enjelita 
Published: December 2020

Many schools need the implementation of articles about the students selection of best transfer Junior High school. In order of fulfil this necessity, we perform a research that giving recommendation of best transfer school for students as a solution by using scientific articles. The selection need some criterias such as the economics value,study ability, time, and facilities. This research implement Multi-Objective Optimization On The Basic Of Ratio Analysist (MOORA).The final result of this research is final decision that help selecting best junior high school for students because it give recomendation output from the highest to lowest value of alternative with each criteria in Moora. This research will give best decision in selecting best junior high school transfer as the students expected.
Yuridis Pemberian Kredit Bank dengan Jaminan Hak Tanggungan pada PT. Bank Mestika Dharma, Medan
Authors: Wijaya Evelin , Fendy Fendy , Aisyah Aisyah 
Published: December 2020

The purpose of this study is to examine the policies of granting credit in PT. Bank Mestika Dharma, TBK along with bonded legality of credit agreement with mortgage guarantee and to find out legal certainty for creditors who hold mortgage rights guarantee. The method of this research is descriptive analytic where the facts found are described in general along with their legal provisions. This research is carried out by doing on the spot and books research by looking the problems and compared with laws and/or implementing regulations which related to the binding of these mortgage rights guarantee. The results of this research is knowing that the collateral binding is very important for all financial institutions which perform their function as intermediation. In PT. bank Mestika Dharma, TBK, every credit must have credit agreement by binding certain guarantees, one of them is mortgage rights guarantee as regulated in UU No.4 in 1996 where this right will give creditor who have this mortgage rights guarantee to take precedence in obtaining payment of the claim from the sale of objects belonging to the debtor and based on the binding value rather than othe creditors in paying their obligation.
Pengaruh Sistem Pelayanan, Ketepatan Waktu dan Daya Beli Masyarakat terhadap Loyalitas Menggunakan Jasa Transportasi Bus pada PT. Atlas
Authors: Tampubolon Monalisa , Jannah Miftahul , Gultom Rinaldi , Sibarani Hendra Jonathan 
Published: December 2020

This study was conducted to determine the effect of service system, timeliness and power of buying community against to loyalty using bus transportation services in PT. Atlas. The method used in this study uses a quantitative approach and uses explanatory research characteristics. Based on the population in this study, the customer for the ticket purchasing service was 778 people. The sampling technique used the Slovin formula as many as 89 people used in this study. Based on the results obtained from this study using partially obtained the value of the service system has a tcount of 6,106> 1,988, punctuality has a tcount of 1,299 <ttable 1,988, while purchasing power has a tcount of 0.043 <ttable 1.988 which means punctuality and purchasing power has no positive and significant effect on service user loyalty at PT. ATLAS Medan, while simultaneously the value of Fcount is (13.451)> Ftable of (3.10) with a sig value of 0.000 <0.05, which means that the service system, timeliness and purchasing power of the community have a positive and significant effect on the loyalty of transportation service users.
Pengaruh Harga dan Fasilitas terhadap Minat Sewa Kost yang Berdampak pada Prestasi Belajar Mahasiswa di Yogyakarta
Authors: Sunarsi Denok , Barsah Akhmar , Hastono H. , Akbar Irfan Rizka 
Published: December 2020

This study aims to determine the effect of price and facilities on boarding rent interest which has an impact on student achievement in Yogyakarta. The method used is explanatory research with analysis techniques using statistical analysis with regression testing, correlation, determination and hypothesis testing. The results of this study, the price has a significant effect on interest in lease by 37.0%, the hypothesis test obtained t count> t table or (7.590> 1.984). Facilities have a significant effect on rental interest by 48.9%, hypothesis testing is obtained t count> t table or (9.677> 1.984). Price and facilities simultaneously have a significant effect on rental interest with the regression equation Y = 9.005 + 0.274X1 + 0.514X2 and the contribution of the effect is 55.5%, the hypothesis test obtained F count> F table or (60.568> 2,699). Rental interest has a significant effect on student achievement by 39.8%, hypothesis testing is obtained t count> t table or (8,051> 1,984)
As metáforas para Deus na obra de Rubem Alves
Authors: Boff Leonardo 
Published: December 2020

Rubem Alves é um autor oceânico. Navegou por oceanos, mares, lagos e rios. Sua obra é vasta. Foi teólogo, precursor da teologia da libertação, pastor prebiteriano, professor de filosofia em escola secundária, de filosofia política na Unicamp, psicanalista, pianista, educador, autor de literatura infantil e poeta. Em cada área destas produziu algo original.
ARENIZAÇÃO NO BRASIL:
Authors: Silva Ivamauro Ailton de Sousa , Suertegaray Dirce Maria Antunes 
Published: December 2020

A finalidade desta pesquisa é caracterizar e comparar a dinâmica pluviométrica das áreas de ocorrência do processo de arenização no território brasileiro. Os estudos sobre arenização aqui registrados, situam-se nos munícipios de Quaraí (RS), Paranavaí (PR), Itirapina (SP), Buritizeiro (MG), Serranópolis (GO), Gilbués (PI), Reserva do Cabaçal (MT) e Manaus (AM). Na perspectiva climática, o artigo realiza um comparativo dessas áreas, evidenciando as características acerca do regime e distribuição pluvial. Para isso, a pesquisa foi constituída através de revisão bibliográfica, elaboração de mapas temáticos, coleta e análise de dados meteorológicos disponibilizados pelo Instituto Nacional de Meteorologia, para 8 estações representativas das diferentes localidades com ocorrência de arenização. Como resultados, o trabalho revela as seguintes asserções: a) considerando a tipologia climática brasileira, o processo de arenização pode ocorrer sob diferentes climas; subtropical, tropical subúmido e equatorial; b) a pluviometria é variável durante o ano para as diferentes localidades; c) a pluviosidade média anual, em todas as áreas analisadas, é superior a 1.100 mm; d) períodos de estiagem são comuns nas áreas com clima tropical subúmido.
Palavras-chave: Arenização, Variabilidade Pluviométrica, Espacialização.
Abstract
The aim of the present study is to characterize and compare the rainfall dynamics of occurrence areas concerning arenization processes throughout the Brazilian territory. Arenization studies registered in the country are located in the municipalities of Quaraí (RS), Paranavaí (PR), Itirapina (SP), Buritizeiro (MG), Serranópolis (GO), Gilbués (PI), Cabaçal Manaus (AM). Concerning a climatic perspective, this study carried out comparisons between these areas, evidencing regime and rainfall distribution characteristics. The research comprised a bibliographical revision, the elaboration of thematic maps and the collection and analysis of meteorological data made available by the National Meteorological Institute, for 8 representative stations of the different localities where arenization is detected. The study results reveal the following investigations: a) considering Brazilian climatic typology, arenization processes can occur under different climates, subtropical, tropical subhumid and equatorial; b) rainfall is variable throughout the year for the different localities; c) the average annual rainfall in all analyzed areas is over 1,100 mm; d) drought periods are common in areas presenting a subhumid tropical climate.
Keywords: Arenization, Rainfall Variability, Comparisons.
DIALOGANDO COM ENSINO DE CLIMATOLOGIA E A PRÁTICA DIDÁTICA NA GEOGRAFIA
Authors: Levy Silva Melo Hugo , Vinicius de São José Rafael , Andrade dos Santos Kezia , Greco Roberto 
Published: December 2020

O ensino da Geografia Física e principalmente o de Climatologia, necessitam de estudos que proporcionem resultados que auxiliem os professores a transformar os fenômenos complexos do clima, em aulas interessantes e que oportunize ao aluno o pensar e refletir criticamente elementos climáticos que os rodeiam. Assim, buscamos como objetivo concretizar o processo de ensino-aprendizagem da climatologia dentro do ensino de geografia. Para esse processo foram confeccionados materiais didáticos (Anemômetro e Barômetro) para que pudessem entender os processos naturais de formação e atuação dos elementos do clima. A prática foi realizada com os alunos do 6º do ensino fundamental, e com as aulas ministradas e observações feitas notou-se uma melhor compreensão dos discentes sobre os conteúdos teóricos de climatologia repassados no ensino fundamental.
Palavras-chave: Climatologia, Ensino-Aprendizagem de Geografia, Material didático.

Abstract
The teaching of Physical Geography and especially the Climatology, need studies that provide results that help teachers to transform complex phenomena of the climate, interesting lessons and that allows the student to think and reflect critically climatic elements that surround them. Thus, we aim to concretize the teaching-learning process of climatology within the teaching of geography. For this process were made didactic materials (Anemometer and Barometer) so that they could understand the natural processes of formation and performance of the elements of the climate. The practice was carried out with the students of the 6th grade, and with the classes given and observations made it was noticed a better understanding of the students about the theoretical contents of climatology passed on in elementary school.
Keywords: Climatology, Geography Teaching-Learning, Didactic material.
O (DES)CONFORTO NO CONJUNTO HABITACIONAL DEOCLÉCIO ARTUZZI I, DOURADOS -MS, NO VERÃO DE 2018
Authors: Cristina Pereira Santos Steffanny , Aparecido da Silva Charlei , Aparecido  dos Santos Vladimir 
Published: December 2020

A cidade de Dourados - MS apresenta predomínio de características climáticas tropicais com temperaturas elevadas, tal condição em conjunto com seu processo de crescimento justificam estudos sobre o clima urbano da mesma. Este trabalho tem como objetivo apresentar a análises dos dados de temperatura do ar e umidade relativa a partir do Índice de Desconforto Térmico de Thom (1959) em conjuntos habitacionais para pessoas de baixa renda localizados na região periférica da cidade. Os dados coletados apontaram que a forma de estruturação deste tipo de bairro e os materiais construtivos das casas influenciam no conforto ou desconforto térmico dos moradores.
Palavras-chave: Clima Urbano; Conjuntos habitacionais; Desconforto térmico.

Abstract The city of Dourados-MS presents predominance of characteristics with the climate of high temperatures, with the condition of grouping its growth process justifying the studies on the urban climate of the same. This work aims to present the temperature databases of the Thom Thermal Incompatibility Index (1959) in low-income housing complexes in the peripheral region of the city. The data found point out that the structuring of this type of neighborhood and the constructive materials of the houses influence the non-leisure or the thermal discomfort of the residents.
Keys-words: Urban Climate; Housing estates; Thermal discomfort.
ORGANIZAÇÃO E PRODUÇÃO DO ESPAÇO: AS TRANSFORMAÇÕES SOCIOESPACIAIS OBSERVADAS NO NÚCLEO ORIGINÁRIO DO BAIRRO MEIO DA SERRA – PETRÓPOLIS – RJ
Authors: Oliveira Paulo Roberto Rodrigues , Gabrish Ambrozio Júlio César 
Published: December 2020

Este artigo aborda as transformações socioespaciais ocorridas durante o surto industrializante nos séculos XIX e XX no núcleo urbano originário do bairro Meio da Serra localizado no Primeiro Distrito do Município de Petrópolis no Estado do Rio de Janeiro. O texto discute as oportunidades do surgimento e as características do núcleo fabril da antiga Companhia Fiação e Tecidos Cometa, assim como, a vida de bairro da comunidade e em particular a expansão das autoconstruções. Mostra como foi a organização e as transformações socioespaciais ocorridas nesse núcleo urbano, bem como as causas do declínio desse aglomerado após o encerramento das atividades produtivas dessa indústria têxtil a partir da década de 1970. Questões correlatas às práticas e políticas de preservação do patrimônio natural, arquitetônico e cultural na centralidade do bairro também são observadas. É um exercício fundamental de compreensão do povoamento desse núcleo urbano, a sua dinâmica entre o presente visível e o passado cristalizado na paisagem indicando a formação de uma periferia urbana.
Palavras-chave: Industrialização. Urbanização.Bairro. Vida de Bairro. Periferia.