bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGARUH PENDEKATAN KONSTRUKTIVISME TERHADAP HASIL BELAJAR IPA DI KELAS V SDN KOTA PADANG
Authors: Adriantoni Adri Antoni , Syafitri Altika 
Published: January 2020

Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan pendekatan onstruktivisme terhadap hasil belajar IPA di kelas V SD Kota Padang. Populasi penelitian ini adalah siswa kelas V SD Kota Padang dengan teknik penentuan sampel secara jenuh, yaitu pengambilan anggota sampel dari populasi dilakukan secara acak tanpa memperhatikan strata yang ada dalam populasi, kelas A sebagai kelas eksperimen menggunakan pendekatan konstruktivisme, dan kelas B sebagai kelas control menggunakan pembelajaran konvensional, dengan rancangan penelitian posttest only control design. Pengumpulan data dalam penelitian ini adalah menggunakan tes hasil belajar berupa soal objektif sebanyak 16 butir soal, data yang diperoleh dianalisis dengan menggunakan uji t. berdasarkan hasil penelitian, terlihat bahwa dan dan taraf signifikan 5%. Berdasarkan pengujian maka hipotesis atau H1 diterima. Dari hasil penelitian terbukti bahwa penggunaan pendekatan konstruktivisme memberikan pengaruh terhadap hasil belajar IPA di kelas V SD Kota Padang Tahun ajaran 2017/2018.Kata Kunci: Pengaruh, Pendekatan Konstruktivisme, Hasil Belajar IPA Abstrac: This study aims to determine the effect of using constructivism approach to science learning outcomes in class V SDN 33 Kalumbuk Padang City. The population of this research is the students of grade V SDN 33 Kalumbuk Padang with sample determination technique is saturated sample, that is taking of sample member from the population is done randomly without considering the strata that exist in population, class A as experiment class using constructivism approach and class B as control using conventional learning, with a post-test only control design study design. Data collection in this research is using test result of learning in the form of objective matter as much as 16 items, the data obtained is analyzed by using test. Based on the result of this research show that and and significant level 5%. Based on the then hypothesis or H1 accepted. From the result of research proved that the use of contructivism approach gives effect to science learning outcomes in class V SDN 33 Kalumbuk City of Padang academic year 2017/2018Keywords: Influence, Contructivism Approach, Learning Result of Science .
Structured telephone support programs in chronic heart failure may be affected by a learning curve
Authors: Tersalvi Gregorio , Vicenzi Marco , Kirsch Katharina , Gunold Hilka , Thiele Holger , Lombardi Federico , Mangner Norman , Sandri Marcus 
Published: January 2020

Aims
The efficacy of a telephone support program in chronic heart failure has been questioned particularly when considering short-term follow-up. This study is aimed to assess the impact of the HeartNetCare telephone support program in chronic heart failure within 18 months of observation and to verify a possible effect of a learning-to-care curve on outcome.

Methods
We retrospectively compared a cohort of 269 chronic heart failure patients included in HeartNetCare program with 200 patients receiving usual care as a control group. All-cause death and hospitalization for heart failure or implantation of left ventricular assist device were the primary composite outcome. Secondary endpoints were the changes in left ventricular ejection fraction and in New York Heart Association (NYHA) functional class. Outcome data were also analyzed in relation to the time of enrollment from program initiation.

Results
At baseline, HeartNetCare group showed lower ejection fraction and higher NYHA class. At the follow-up, 59 HeartNetCare patients (21.9%) and 49 usual care patients (24.5%) reached the primary endpoint (P = 0.51). After 18 months of follow-up, HeartNetCare patients improved ejection fraction and NYHA class compared with the usual care patients (P < 0.001). We also observed that the HeartNetCare patients enrolled after 12 months from the initiation of the program had a more favorable outcome in primary endpoint compared with controls.

Conclusion
These results indicate that the long-term impact of a structured telephone support program might be able to positively influence symptoms and reduce events in chronic heart failure. These appreciable effects where more evident after an initial period essential for completing the learning-to-care curve.
Adherence to guidelines in the management of patients with chronic heart failure follow-up: role of periodic echocardiographic examinations
Authors: Bosso Giorgio , Valvano Antonio , Guarnaccia Franco , Fimiani Biagio , Carbone Vincenzo , Cittadini Antonio , Zito Giovanni Battista , Oliviero Ugo 
Published: January 2020

Background and aim
The Adherence to Guidelines in the Treatment of patients with Chronic Heart Failure trial showed a poor adherence to the current therapeutic guidelines in 660 chronic heart failure (CHF) patients. The second phase, Adherence to Guidelines in the Treatment of patients with Chronic Heart Failure follow-up, was aimed to determine if periodic echocardiographic evaluations could improve the prognosis of CHF patients and/or increase the adherence to the guidelines.

Material and methods
Among 528 CHF patients with reduced ejection fraction from the ALERT registry, 436 patients accepted to participate in the second phase of the study between February and September 2013 and completed the 3-year follow-up phase between February and September 2016. They were randomized into two groups: Group A (n = 218) followed by clinical evaluation and ECG every 3 months, and echocardiography every 6 months and Group B (n = 218) monitored only with clinical evaluation and ECG every 3 months.

Results
The number of vascular events that occurred resulted as similar in both the groups: there were 78 hospitalizations (37 in Group A vs. 41 in Group B); 9 home-treated vascular events (4 in Group A and five in Group B); and 16 cardiovascular deaths (9 and 7, respectively). The adherence to the guidelines at the end of the trial resulted as significantly improved in both the groups in comparison with the basal evaluation, without differences between the two groups.

Conclusion
A strict follow-up of CHF patients was associated with a lower number of events and an improvement in the adherence to the guidelines. Periodic echocardiography does not modify these results.
Potential role of macrophage migration inhibitory factor in the pathogenesis of Marek’s disease
Authors: Fan Zhongjun , Wang Huanli , Pan Jiahao , Yu Shupei , Xia Wenlong 
Published: January 2020

Abstract

Introduction
Marek’s disease virus (MDV) can cause malignant T-cell lymphomas and immunosuppression in chickens. Macrophage migration inhibitory factor (MIF) not only plays a critical role in inhibiting T-cell responses, but also contributes to multiple aspects of tumour progression. The aim of this study was to reveal the potential role of MIF in the pathogenesis of MDV infection.

Material and Methods
MIF gene expression levels were measured by using real-time PCR. Expression was assayed at different times in chicken embryo fibroblast (CEF) cells and tissue samples of SPF chickens infected with different MDV strains and fold change was calculated by the 2–△△CT method.

Results
The expression of MIF was significantly downregulated (p < 0.05 and FC > 2) in CEF cells infected with the very virulent MDV RB1B strain at 48 h post infection (hpi) and in the skin and spleen at 14 days post infection (dpi). The reduction of MIF expression was also found in CEF cells infected by reticuloendotheliosis virus (REV), avian leukosis virus subgroup J (ALV-J), and MDV vaccine strain CVI988 or in HD11 cells stimulated with TLR2, 3, 4, and 7 ligands. Interestingly, MIF expression decreased continuously from 7 to 28 dpi in the thymus after RB1B virus infection while it increased after CVI988 virus infection. Upregulated expression of MIF was found in CEF infected with RB1B at 96 hpi and in the spleen and skin at 21 and 28 dpi.

Conclusion
The present study revealed the different expression pattern of MIF in response to MDV infection and indicated that MIF level may be associated with MDV pathogenesis.
PEMODELAN TARIKAN PERJALANAN ANGKUTAN BARANG DI PROVINSI KALIMANTAN TIMUR
Authors: Arifin Triana Sharly P. 
Published: January 2020

Abstract East Kalimantan is a province with a large area in Indonesia. This causes the transportation of goods in the province is also large. The pattern of movement of goods in East Kalimantan Province is influenced by the potential of its natural resources. This study aims to analyze the attraction model of the movement of freight transportation in East Kalimantan Province, using the Origin and Destination Matrix of movement for 9 districts/cities in East Kalimantan Province, as well as the movement of 3 external zones. Furthermore the Origin and Destination Matrix of the movement is converted to trip units/year based on the type of truck most often used to transport goods. This is done so that in the analysis process, variables can be correlated with socio-economic data as independent variables. The analysis was performed using a zone-based correlation model, a step-by-step method of type 1. The results show that the best model for the attraction of freight transportation in East Kalimantan Province is a model that uses independent variables of egg production and chicken livestock, with a coefficient of determination of 0.564. Keywords: trip attraction,freight transportation, Origin and Destination Matrix, external zone Abstrak Kalimantan Timur merupakan suatu provinsi dengan luas wilayah yang besar di Indonesia. Hal ini menyebabkan angkutan barang di provinsi ini besar pula. Pola pergerakan barang di Provinsi Kalimantan Timur dipengaruhi oleh potensi sumber daya alam yang dimilikinya. Studi ini bertujuan untuk menganalisis model tarikan pergerakan angkutan barang di Provinsi Kalimantan Timur, dengan menggunakan Matriks Asal Tujuan pergerakan untuk 9 kabupaten/kota di Provinsi Kalimantan Timur, serta pergerakan 3 zona eksternal. Selanjutnya Matriks Asal Tujuan pergerakan dikonversikan ke satuan trip/tahun berdasarkan jenis truk yang paling sering digunakan untuk mengangkut barang. Hal ini dilakukan agar dalam proses analisis, variabel dapat dikorelasikan dengan data sosial-ekonomi sebagai variabel bebas. Analisis dilakukan dengan menggunakan model korelasi berbasis zona, metode langkah demi langkah tipe 1. Dari hasil pemodelan diperoleh bahwa model terbaik untuk tarikan angkutan barang di Provinsi Kalimantan Timur adalah model yang menggunakan variabel-variabel bebas pro-duksi telur dan ternak ayam, dengan koefisien determinasi sebesar 0,564. Kata-kata kunci: tarikan pergerakan, angkutan barang, Matriks Asal dan Tujuan, zona eksternal
KAJIAN SPASIAL LOKASI BERBELANJA DI KOTA BANDUNG
Authors: Joewono Tri Basuki , Andrianto Marco 
Published: January 2020

Abstract Shoppers consider many aspects in choosing specific location from variety of shopping location. Spatial analysis is used to determine the catchment area of shopping location based on the location of shoppers’ residence along with the correlation with shoppers’ activity and characteristic. The purposes of this study are to analyze the catchment area of shopping location in Bandung based on shopper’s preferences and to analyze the shopping travel pattern. The questionnaire data about the grocery shopping trip is analyzed using Thiessen Polygon and Buffering Method. The analysis shows that there is a mismatch between the market service coverage and the preferences of respondent destination. Analysis shows that shoppers will choose the shopping location by considering the distance of shopping location from home, travel costs, and travel duration in selecting any type of shopping location. Keywords: shopping location, spatial analysis, GIS, catchment area, shopping trip characteristics Abstrak Ada banyak hal yang dipertimbangkan oleh pelaku belanja dalam memilih lokasi berbelanja yang beragam. Analisis spasial dipergunakan untuk menjelaskan daerah cakupan lokasi belanja berdasarkan lokasi tempat tinggal serta keterkaitannya dengan aktivitas dan karakteristik pelaku belanja. Tujuan penelitian ini adalah menganalisis daerah cakupan lokasi berbelanja pilihan pelaku belanja di Kota Bandung dan menganalisis pola perjalanan berbelanja. Data hasil penyebaran kuisioner mengenai perjalanan berbelanja kebutuhan sehari-hari dianalisis menggunakan Metode Thiessen Polygon dan Metode Buffer. Hasil analisis menunjukkan bahwa terdapat ketidaksesuaian antara luas cakupan layanan suatu lokasi belanja dengan luas jangkauan layanan lokasi pilihan pelaku belanja. Analisis menunjukkan bahwa pelaku belanja memilih lokasi belanja dengan mempertimbangkan jarak dari tempat tinggal, durasi, dan biaya perjalanan. Kata-kata kunci: lokasi berbelanja, analisis spasial, GIS, daerah cakupan, karakteristik perjalanan berbelanja
Variabilidade e Tendências das Precipitações Pluviais em Rio do Sul – SC
Authors: Murara Pedro , Mendonça Magaly 
Published: January 2020

As inundações urbanas compreendem uma das principais problemáticas socionaturais. Conhecer a vulnerabilidade da população atingida pelas inundações é fundamental para a compreensão de ações que visem a mitigar a ocorrência desse fenômeno. Um dos primeiros passos da investigação da vulnerabilidade a inundações é conhecer a dinâmica pluvial da localidade. Nesse contexto, o presente artigo objetivou caracterizar a variabilidade das precipitações pluviais e sua relação com a ocorrência de inundações no município de Rio do Sul, localizado na mesorregião do Vale do Itajaí, no Estado de Santa Catarina. A metodologia envolveu uma intensa análise de dados de precipitações pluviais e registros de inundações, por meio de técnicas estatísticas e aplicação dos índices ClimPACT. Os resultados identificaram a estação de verão como a mais chuvosa e o outono como o período de diminuição nos totais de chuva, no entanto, as chuvas mais intensas ocorrem na estação de inverno, período em que há os maiores registros de inundações. Por fim, evidenciou-se que a região apresentou aumento nos registros dos totais pluviais e tendência à ocorrência de eventos extremos de chuvas. Variability and Trends of Rainfall Precipitation in Rio do Sul - SC A B S T R A C TUrban floods comprise one of the main socialnatural problems. Knowing the vulnerability of the population affected by floods is fundamental for understanding actions that aim to mitigate the occurrence of this phenomenon. One of the first steps in the investigation of vulnerability to floods is to know the pluvial dynamics of the locality. In this context, the present article aimed to characterize the rainfall variability and its relation with the occurrence of floods in the municipality of Rio do Sul, located in the mesoregion of the Itajaí Valley, in the State of Santa Catarina. The methodology involved an intense analysis of rainfall data and flood records, using statistical techniques and application of the ClimPACT indices. The results identified the summer season as the rainy season and autumn as the period of decline in rainfall totals, however, the most intense rains occur in the winter season, when there are the highest flood records. Finally, it was evidenced that the region presented an increase in rainfall total records and tendency to extreme rainfall events.Keywords: Rainfall, Historic Serie, Software R, ClimPACT.
Adaptações estruturais e potencial plástico de Schinus terebinthifolia Raddi. (Anacardiaceae) em diferentes formações de restinga
Authors: Melo Júnior João Carlos Ferreira , Gonçalves Taise Milena , Schöne Raissa Iana Leite Jardim 
Published: January 2020

Plantas da Restinga se desenvolvem sob condições ambientais heterogêneas, principalmente quando se distribuem ao longo de um gradiente. O presente estudo avaliou as adaptações morfoanatômicas foliares de Schinus terebinthifolia Raddi (Anacardiaceae) ocorrente em perfis fitofisionômicos de restinga: arbustiva, arbustivo-arbórea e floresta de transição. Em cada perfil fitofisionômico foram selecionados dez indivíduos dos quais foram coletadas quinze folhas totalmente expandidas para análise de atributos morfoanatômicos funcionais, tais como: massa fresca e seca, área foliar, área específica foliar, densidade foliar e estomática e espessura de tecidos. Variáveis ambientais como nutrição edáfica e radiação luminosa foram mensuradas. As populações foram comparadas por meio de ANOVA e PCA. Os atributos anatômicos mostraram-se menos plásticos que os morfológicos. As populações mostraram-se distintas entre si, sendo tipicamente xeromórfica na formação arbustiva e mesomórfica na fisionomia florestal, em função da oferta nutricional do solo, além da variância de temperatura e umidade. As diferenças encontradas são uma resposta aos fatores ambientais, principalmente ao gradiente edáfico que atua como um filtro ambiental que direcionada as adaptações estruturais da espécie. Structural adaptations and plastic potential of Schinus terebinthifolia Raddi. (Anacardiaceae) in different Restinga formations A B S T R A C TRestinga plants develop under heterogeneous environmental conditions, mainly when are distributed along a gradient. The present study evaluated the foliar morphoanatomy adaptations in Schinus terebinthifolia Raddi. (Anacardiaceae) occurring in three different formations of Restinga: shrubby restinga, shrubby and wooded restinga and transition forest. In each formation were selected ten individuals were selected from which 15 fully expanded leaves were collected for analysis of function morphoanatomic attributes. Environmental variables as edaphic nutrition and light radiation were measured. Populations had been compared by analysis of variance (ANOVA) and PCA. The anatomic attributes were less plastic than the morphologic. The populations were distinct from each other, being typically xeromorphic in the shrubby formation and mesomorphic in transition forest, as a function of a better or worse supply of soil nutrition. The differences found are an answer to the environmental factors, mainly the edaphic gradient which acts as an environmental filter that directs the structural adaptations of the species.Keywords: conservation of biodiversity, leaf morphoanatomy, edaphic gradient, phenotypic plasticity, oligotrophic scleromorphism.
Impact Optimization of Battery Energy Storage System in Microgrid Operation
Authors: Adjei Bernard , Donkoh Elvis K. , Otoo Dominic , Owusu-Ansah Emmanuel De-Graft Johnson , Mahama Francois 
Published: January 2020

In microgrid operation, one of the most vital tasks of the system control is to wiselydecide between selling excess power to the local grid or charge the Battery Energy Storage System (BESS). Our study uses Mixed-Integer Linear Programming to investigate the impact of storage system on the operational cost of a microgrid. The results suggested that the presence of BESS would relieve the pressure on the utility grid but not the cost of electricity due to the expensiveÂ nature of the storage plant. In view of this, it will be more beneficial to sell excess renewable generated power to the utility grid than to invest in a storage system for larger microgrids.
Particle matter from a diesel engine fueled with Jatropha curcas oil biodiesel and ultra-low sulphur diesel
Authors: Acevedo-Gamboa Helmer-Rodolfo , Flórez-Serrano Elkin-Greforio 
Published: January 2020

Biodiesels are promoted as alternative fuels due to their potential to reduce dependency on fossil fuels and carbon emissions. Research in this field has focused on the study of the emissions of light duty vehicles. However, particle matter and gaseous emissions emitted from heavy-duty diesel engines fueled by Jatropha Oil Biodiesel (JOB) and Ultra-Low Sulphur Diesel (ULSD) has not been studied. The objective of this study is to explore the performance and emission levels of a Cummins 4-stroke, 4.8 liter, 4-cylinder diesel engine with common rail fuel injection, equipped with a cooled Exhaust Gas Recirculation (EGR). There was a substantial reduction by the use of JOB in unburned hydrocarbons (- 45%), carbon monoxide (- 75%), and particulate matter (- 25%) compared to emission from diesel fuel. At mid and high loads, NOx emissions were higher for JOB compared to ULSD. Most of the particles (64%) for ULSD were in a range of between 40 and 560 nm. On the other hand, most of the particles (94%) for JCB mode were between 6 and 40 nm.
In the range between 6 and 40 nm, mass mean diameters in ULSD were 34.4, 34.7 and 33.3 nm while for JOB they were 21.3, 18.2 and 20.1 nm for 100, 50 for a 10% load, respectively.
Transient pressure analysis for vertical wells with spherical power-law flow
Authors: Humberto Escobar Freddy , Martínez Javier-Andrés , Bonilla Luis-Fernando 
Published: January 2020

Heavy oil is considered nowadays as one of the unconventional reservoirs of main interest in the oil industry. Some of them display non-Newtonian pseudoplastic behavior which mathematical modeling differs from the conventional case and, therefore, the flow regimes display some particular behaviors.Fracturing fluids, foams, some fluids for Enhanced Oil Recovery (EOR) and drilling muds can also fall into this category. The spherical/hemispherical flow mainly caused by partial completion/penetration deserves a particular treatment for pseudoplastic flow. A single research for this case was found in the literature to introduce only its mathematical model.
The pressure and pressure derivative behavior of spherical/hemispherical flow behavior of a slightly compressible, non-Newtonian power-law fluid (pseudoplastic) is studied in this work and conventional and Tiab’s Direct Synthesis (TDS) methodologies are extended for well test interpretation purposes. For pseudoplastic spherical/ hemispherical flow, the slope of the pressure derivative is no longer -½, besides it changes with the value of flow behavior index n, which indicates that the interpretation of pressure data for the dealt systems through the use of traditional methods should not be accurate. New Equations are introduced to estimate spherical/ hemispherical permeability and spherical/hemispherical skin factor for the systems under consideration. The Equations were successfully verified by its application to synthetic cases.
Pressure and pressure derivative analysis for non-newtonian pseudoplastic fluids in double-porosity formations
Authors: Escobar Freddy-Humberto , Zambrano Angela-Patricia , Giraldo Diana-Vanessa , Cantillo José-Humberto 
Published: January 2020

Non-Newtonian fluids are often used during various drilling, workover and enhanced oil recovery processes. Most of the fracturing fluids injected into reservoir-bearing formations possess non-Newtonian nature and these fluids are often approximated by Newtonian fluid flow models. In the field of well testing, several analytical and numerical models taking into account Bingham, pseudoplastic and dilatant non-Newtonian behavior have been introduced in the literature to study their transient nature in porous media for a better reservoir characterization. Most of them deal with fracture wells and homogeneous formations and well test interpretation is conducted via the straight-line conventional analysis or type-curve matching. Only a few studies consider the pressure derivative analysis. However, there exists a need of a more practical and accurate way of characterizing such systems. So far, it does not exist any methodology to characterize heterogeneous formation bearing non-Newtonian fluids through of well test analysis. In this study, an interpretation methodology using the pressure and pressure derivative log-log plot is presented for non-Newtonian fluids in naturally fractured formations, so the dimensionless fracture storativity ratio, ω, and interporosity flow parameter, λ, are obtained from characteristics points found on such plot. The developed equations and correlations are successfully verified by their application only to synthetic well test data since no actual field data are available. A good match is found between the results provided by the proposed technique and the values used to generate the simulated data.