bluuebunny/crossref_metadata_2025_split huggingface dataset:
HEAT TRANSFER DURING HEAT CARRIER FLOW IN A VERTICAL POROUS MICROCHANNEL
Authors: Avramenko A.A. , Kovetskaya M.M. , Kovetska Yu.Yu. , Sorokina T.V. 
Published: April 2020

Heat transfer with a steady flow of coolant in a vertical microchannel filled with a porous medium is considered. The influence of porosity, the slippage effect on the wall, and the Rayleigh number on heat transfer are analyzed.
The simulation results showed that with an increasing of the porosity parameter M (decrease permeability), the flow velocity decreases, the velocity jump on the wall also decreases, and the velocity profile becomes more filled. With an increase in the Rayleigh number, the relative flow velocity decreases, the shape of the velocity profile changes, it becomes M-shaped. At high Rayleigh numbers, the effect of free convection becomes predominant, and the shift of the maximum velocity to the channel wall is associated with a decrease in the density of the medium near the wall.
With an increase in the Rayleigh number and the parameter M, the temperature jump on the wall decreases, local temperature values tend to the wall temperature values, the shape of the temperature profile aligns.
An increase in the Knudsen number decreases the heat transfer rate. This is due to an increase in the temperature jump on the wall, which causes degradation in the conditions of thermal interaction between the liquid and the wall.The dynamics of change of the relative Nusselt number with increasing Rayleigh number shows that there is an inversion of the influence of the porosity parameter M on the heat transfer coefficient. With small values of Ra, with an increase in the parameter M, the heat transfer coefficient increases, since the temperature jump on the wall decreases. At Ra = 400, the effect of porosity is not observed.
At high values of Ra, the intensity of heat transfer decreases but not so sharply as at low of Ra. That effect is caused from decreasing rate flow near the wall.
Enhancement of power efficiency of evaporating-condensing heat exchangers
Authors: Gershuni A.N. , Pysmennyy Ye.N. , Nishchik A.P. 
Published: April 2020

The aspects of heat transfer in evaporating-condensing heat exchangers conditioning their thermophysical merits and advantages as regards routine heat transferring devices are determined and analyzed. It is shown that implementation of one of these aspects which is transformation of heat flux density in its transferring from “hot” medium to “cold” one by changing the ratio of the lengths of the evaporation and condensation zones of evaporating-condensing heat transferring elements (positioning of tube plate separating the channels with heat exchanging media) allows studying optimization of the said ratio in respect to getting the minimal thermal and aerodynamic resistances of evaporating-condensing heat exchangers.
Thus, the concerned work on one of the parts of such study is aimed to derive the correlations for optimal ratio of evaporation and condensation zones in gas-to-gas heat exchangers based on vertical transversely finned tubular thermosiphons to spend the minimal power required to pump heat-exchanging media under the specified conditions of heat transfer.
As an objective function of optimization the dimensionless ratio of transferred heat flux to the sum of the powers provided to pump the heat-exchanging media through the heat-exchanger channels is accepted. This ratio is called a factor of heat exchanger power efficiency.
In the concerned study the functional dependence of dimensionless power efficiency factor of evaporating-condensing heat exchanger upon dimensionless ratio of the lengths of evaporation and condensation zones is derived. The performed extremum research of the dependence revealed that it has an extremum for an actual range of the determining parameters and this extremum is the maximum. The study resulted in an equation of optimal relationship between the zone lengths (the heights of the channels occupied by flowing heat-exchanging media) that corresponds to the maximal factor of power efficiency.
MENINGKATKAN KEMAMPUAN BERCERITA SISWA KELAS III SDN 1 MANGARAN, KEC. MANGARAN DENGAN MENGGUNAKAN PERMAINAN KREATIF BERBASIS KEBUDAYAAN LOKAL
Authors: Rofek Aenor 
Published: April 2020

Keterampilan berbicara adalah keterampilan untuk mengungkapkan gagasan, pikiran, dan perasaan secara lisan. Berbicara adalah bentuk komunikasi yang membentuk perilaku manusia yang memanfaatkan faktor fisik, yaitu alat ucap, berupa suara, gerakan tubuh, mimik untuk mempertegas isi pembicaraan. Berdasarkan observasi awal di SDN 1 Mangaran, Kec. Mangaran. Kab.Situbondo terdapat 30 siswa di kelas III, para siswa sebagian besar merasa takut dalam bercerita. Pada kegiatan pembelajaran bercerita hanya 9 siswa yang berani bercerita dengan lancar, sedangkan siswa yang lain masih kurang kemampuan berceritanya. Hasil peningkatan pembelajaran yang dilakukan dalam rangka peningkatan kemampuan berbicara siswa kelas 3 SDN 1 Mangaran sudah dikatakan sudah berhasil.
POLA DISTRIBUSI DAN MARGIN PEMASARAN GABAH DI KABUPATEN KARAWANG
Authors: Aeunnisa Nurul , Sumarjono Djoko 
Published: April 2020

The purpose of this research is to analyze the difference of government floor price of grain with the average costs of paddy, analyzing the distribution pattern of grain amd amalyze marketing margins of grain in Karawang Region. The benefit from this research is to design and efficient the grain distribution in Karawang Region and this study can be used as reference for practitioners and stakeholder in taking policy on grain price. Methods used in this study is survey. The location chosen by purposive. The amount of respondent were 82 respondents using the snowball method. The analysis using descriptive and statistics One sample t-test, the calculation of the avarage cost of paddy, the percentage of patterns and the calculation of the margin marketing. The results showed that there are differences of grain price of avarage cost by IDR. 3.531 and the price of grain non government by an average of IDR. 4.347 with the floor price of the government (HPP) commodity the grain by IDR. 3.700 in significantly. There are two patterns of marketing grain which is a long pattern there are farmers – broker – ricemill with the percentage of 67 %, and the short pattern there are farmers – ricemill with the percentage of 33 %. The margin value of long pattern by IDR. 250 per kilogram, while the short pattern IDR. 0 per kilogram. There are differences, the long pattern with the short pattern in significant. Keywords: Farming, operational cost paddy, pattern, margin.
PENGARUH PEMANGKASAN KUNCUP APIKAL TERHADAP PRODUKSI BIJI DAN KADAR KLOROFIL DAUN ALFALFA (Medicago sativa L)
Authors: Subantoro Renan , Prabowo Rossi 
Published: April 2020

Alfalfa plant in Indonesia its not easy to produce flowers and seeds. Flower production is also affected by cutting the apical bud. At this time there is no research on the effect of cutting the length of the apical bud of the flower and seed production of alfalfa, both in quantity and quality. Thus this study examines the apical bud cutting the length of the seed production and alfalfa leaf chlorophyll content. The purpose of this study was to determine the most optimal length of the apical bud cutting to produce optimal growth and production of alfalfa seed. Outcomes and benefits of this research are: a). Provide information for other researchers on seed production and alfalfa leaf chlorophyll content were treated with different apical bud cutting, which will carry out further research. b). Provide recommendations to stakeholders on the apical bud cutting the most optimal for alfalfa plants that produce highest seed production and alfalfa leaf chlorophyll content. c). Providing information for farmers and researchers on alfalfa seed development opportunities for the tropic zone. Research using randomized complete block design with four replications. This study was a single-center trial with a treatment of various lengths cutting apical bud. Apical bud cutting long treatment include without cutting, cutting apical bud length of 5 cm, 10 cm, 15 cm, 20 cm and 25 cm from the ground. When cutting is done when the plants aged 6 weeks after planting. The results of the study showed that the alfalfa plant leaf extract can be produced which is solid green chlorophyll that has the potential to be used as raw material for the manufacture of supplement health drinks. Alfalfa flower has emerged in the 4th month, this occurred in the treatment of cutting 5 cm. It shows the probability that the flower has the potential to develop into seeds. Keywords: alfalfa, cutting, chlorophyll, seeds, apical bud
ANALISIS PENDAPATAN PETERNAKAN AYAM BROILER POLA KEMITRAAN DI KECAMATAN GUNUNG PATI SEMARANG
Authors: Cahyaningtyas N P , Prasetyo Edy , Sarengat W 
Published: April 2020

Penelitian ini bertujuan untuk mengidentifikasi penggunaan faktor-faktor produksi (meliputi jumlah DOC, pakan ternak, tenaga kerja, listrik dan vaksin) menghitung biaya, penerimaan, dan pendapatan serta, menganalisis pengaruh faktor-faktor produksi terhadap pendapatan usaha ternak ayam broiler pola kemitraan di Kecamatan Gunungpati Kota Semarang. Metode penelitian yang digunakan adalah survey. Survey yaitu penelitian yang mengambil sampel dari populasi dan menggunakan kuesioner sebagai alat pengumpulan data. Pengambilan sampel menggunakan Random Sampling dan pengumpulan data dalam penelitian ini menggunakan observasi dan wawancara dengan bantuan kuisioner. Analisis pengujian ini dilakukan dengan uji regresi linier berganda. Hasil dari penelitian menunjukkan biaya produksi paling tinggi diperoleh peternak dari PT Mustika yaitu sebesar Rp.1.603.339.108,- per seribu ekor, PT Malindo Rp. 148.813.906,- per seribu ekor, PT Umi Perkasa Rp. 170.429.177,- per seribu ekor, PT HBS Rp. 67.759.535,- per seribu ekor. Sedangkan jumlah pendapatan tertinggi di peroleh peternak PT Mustika sebesar Rp. 275.497.310,- sedangkan pendapatan terendah diperoleh peternak PT Malindo sebesar Rp. 242.293.518,-. Secara keseluruhan rerata pendapatan per tahun peternak di Kecamatan Gunungpati mencapai Rp 266.876.566,-. Secara serempak variabel-variabel jumlah DOC, tenaga kerja, pakan, listrik dan vaksin berpengaruh signifikan terhadap variabel dependen pendapatan. Secara parsial hanya variabel jumlah DOC yang berpengaruh signifikan terhadap variabel pendapatan. Sedangkan variabel tenaga kerja, pakan, listrik dan vaksin berpengaruh tidak signifikan terhadap variabel pendapatan.
Kata kunci : Ayam broiler, Biaya Produksi, Pendapatan.
PENGARUH PENGGUNAAN SILASE PAKAN KOMPLIT BERBAHAN ECENG GONDOK TERHADAP KECERNAAN PROTEIN PADA DOMBA
Authors: Hanun L , Muktiani A , Nuswantara L K 
Published: April 2020

This study aims to determine the effect of fedding a complete ration of silage made from water hyacinth on concentration of ammonia rumen, total protein of rumen fluid and protein digestibility. Fifteen rams with average body weight of 19 ± 3.98 kg used on this research. The experiment was arranged in 3x5 randomized completed design. There treatment were T1= concentrate and elephant grass, T2= complete feed silage contained water hyacinth without L. plantarum starter addition, and T3= complete ration silage contained water hyacinth added with L. plantarum. Ration was formulated by isoenergy and isoprotein feed (CP 13%, TDN 65%). Feed treatment was given for 12 weeks. The results showed that the consentration of ammonia rumen was different (P0,05). Concentration of ammonia rumen of T1, T2 and T3 as follows: 2,53, 2,04, 1,80 mM. Total protein of rumen fluid and protein digestibility ranged by 295,70-381,04 mg/g and 75,00-77,29%. The conclusions of this study were the provision of complete feeding silage either without or with the addition of L. plantarum starter to produce the same digestible protein as conventional ration (concentrate and elephant grass).
Keywords : silage, water hyacinth, protein, digestibility, sheep.
STRATEGI PENGEMBANGAN USAHA KERAJINAN TANGAN SABUT KELAPA DI LKP AKAS KABUPATEN KEBUMEN
Authors: Andari Yunida Tri , Sasongko Lutfi Aris , Nurjayanti Eka Dewi 
Published: April 2020

Cocunut coir, as a secondary product of coconut, can be processed into eco-friendly fiber. This fiber is used as raw materials for handicrafts. This research aims to analyze the internal and external factors, as well as formulating an alternative strategy for the development of coconut coir handicraft business in LKP AKAS Kebumen Regency. The data used primary and secondary type. Data analysis method is done by using Internal Factors Evaluation (IFE) matrix, External Factors Evaluation (EFE) matrix, Internal External (IE) matrix and SWOT matrix. Data analysis resulted internal factors (strenghts) including abundant availability of raw materials, availability local labor, short marketing channels, national and international marketing. In the other hand, internal factors (weakness) are including lack of product innovation, an effective organizational structure, old manpower, an availability recorded orders, and lack of promotion through the website and social media. The external factors (opportunity) including the partnership with raw materials suppliers, the steadiness of raw material prices and repeated orders, the lack of competitors with the same materials, the supports from local government, and the request of delivery orders. In the other hand, the external factors (threaths) are including the risk of the market (numerous kind of handicraft with different materials), and the presence of other handicraft industry. The result of IE analysis, LKP AKAS is located in zone I, i.e grow and build. Suitable strategies for this area are market penetration, market development, and product development. Alternative strategies that can be done are: (1) make a business plan including production layout, product variation (production) and marketing to add customers; (2) summarize and manage the customer’s orders in order to have regular evaluation of the business progress in the future; (3) modified the product becomes more varied in order to be able to compete with other handicraft products; and (4) increase promotional activities online (website and social media) to attract consumers.
Keywords : development strategy, handicraft, coconut coir, SWOT, Kebumen.
TEKNIK PEMANGKASAN TANAMAN KOPI (Coffea sp)
Authors: Subantoro Renan , Aziz Mukhamad Abdul 
Published: April 2020

Production of smallholder coffee crops is not maximal because the crop maintenance factors are mostly in terms of proper pruning techniques. Through this article, it is hoped that the information and field experience of coffee cropping techniques needed by smallholder coffee farmers will need to increase the production of coffee produced by the good quality of the coffee produced. The purpose of trimming coffee crops is to improve the shape of the tree, improve quality and production, and facilitate maintenance and harvesting. The writing method of this paper was compiled by examining various literature and field assessments of coffee crop trimming techniques to improve the quality of coffee production. As a result of the study in this paper: Trimming forms for coffee crops so that strong crops and crops are balanced in forming Plagiotropic branches, both primary and secondary branches. It should be noted is how to treat the coffee crop itself to support the success of cultivation. Maintenance pruning activities are basically aimed at maintaining the continuity of the plant skeleton obtained from pruning the form by removing unproductive branches.
Keywords: coffee, maintenance, form of pruning.
PENGARUH PEMBERIAN TEPUNG KIAMBANG (Salvinia molesta) DENGAN ADITIF MULTIENZIM DALAM RANSUM TERHADAP PERFORMANS ITIK TEGAL
Authors: P Sinaga R , Suprijatna E , Kismiati S 
Published: April 2020

ABSTRACT
The research aims to determine the influence of using Salvinia molesta with multienzyme additive in rations of tegal duck performans. This research uses 72 Tegal female ducks 22 weeks old. Feed ingredients used in the reasearch consisted of corn, soybean meal, oil, bran, fish meal, premix, methionine, lysine, Salvinia molesta and multienzyme additives. The reasearch was conducted with Completely Randomized Design with 6 treatments and 4 replications of the study. Each experimental unit consists of 3 ducks. Ransum namely: T0: feed without Salvinia molesta and enzyme; T1: feed without Salvinia molesta + multienzim; T2: feed with Salvinia molesta. 5% + without multienzymes; T3: feed with Salvinia molesta. 5% + multienzim; T4: feed with Salvinia molesta. 7,5% + multienzim; T5: feed with Salvinia molesta. 10% + multienzim. The result showed no significant treatment (P> 0,05) to consumtion of ration, feed conversion and Tegal duck eeg weightbut have an effect on hen day production (P
Educational Evaluation of the Federal University of Latin American Integration, Brazil
Authors: Diaz-Villavicencio Guillermo 
Published: April 2020

Purpose: Analyzes satisfaction with the Federal University of Integration of Latin America (UNILA). Focused on the development of a new educational scheme in Latin America, being a university more open to change, multicultural, bilingual and Latin American.
Methodology: the institutional evaluation quantitative methodology would be applied by the multidimensional method, being able to contemplate all the specificities of the academic community.
Findings: This study answers four hypotheses that are within the four large educational dimensions evaluated. The results show that there are around 62% of satisfaction throughout the university, but they also indicate a concern for international, social and educational cooperation.
Research Limitation: The main limitation of the investigation is related to the period of time considered (one year). Therefore, it is recommended to verify the results obtained in this study, carrying out a longitudinal investigation (considering more years).
Originality: We generated a model that is oriented towards a generic measurement of satisfaction and it was builted considering the four distinguishing dimensions required by Educational Minister. All results were analyzed in a linear regression econometric model that were show us the level of significance of each question.
KEYWORD: Multicultural education, evaluation technique, multidimensional analysis, regression econometric model, Reliability and validity.
Design and fabrication of wave generator using an oscillating wedge
Authors: Thi Yen Vu Lu , Phuong Ha , Xuan Thinh Ho , Thanh Liem Dao , Quoc Thanh Truong , Doan Son Tran 
Published: April 2020

This paper describes the design and fabrication of a wave flume and associated equipment. The water wave generation by a triangle wedge is examined in this paper. Wave flume is fabricated by a concrete flume, which is 0.75-meter-wide, 1.3-meter-tall, and 11 meters long. One side of the flume is made of concrete, and the other side is made of clear mica sheets for observe the water wave profile. Wave flume is equipped with a triangle wedge located at one end of the wave flume, and this triangle wedge can be move along the rail of the wave flume. The passive wave absorber, which is made of honeycomb, which is located at the other end of the wave flume for absorbing energy waves generated from the wavemaker. The wedge is controlled by a desktop computer through Matlab software. The wedge can be controlled move up and down at a prescribed speed and oscillation amplitude corresponding to the desired wave height and wave frequency. At the middle flume is equipped microlaser distance sensor, which provides the data-logging capability. The microlaser distance sensor can collect wave height and wave period through a small ball, which is motioned in the tube, which is assembled on the water surface, and the small ball is very slight to avoid kinetic inertia energy. At the wavemaker is equipped with an Eccentricity Sensor, which is used to measure the wedge position to feedback for a desktop computer. Wave flume can generate the largest waves are about 0.2 meter high, a period about 1 second, and a wavelength of about 1.5 meters. The waves generated by an oscillating wedge have been measured, analyzed to consider the generated wave energy.
Perencanaan Sistem Instalasi Plambing Air Bersih dengan Penerapan Alat Plambing Hemat Air Di Rumah Sakit Universitas Sam Ratulangi
Authors: Rahayu Adeyra Khairunisa , Pratama Yulianti , Nurprabowo Anindito 
Published: April 2020

<p>The hospital is a health service building, a place of transmission of disease and allows environmental pollution and health problems. One of the prevention of disease transmission and environmental pollution, it is necessary to do repairs and improvements by using a plumbing system to have good sanitation and environmental friendly. In this case, needed to know how much water can save by method comparing between plumbing tools conventional and non-conventional standar. UNSRAT’s hospital has a population of 2,962 people who needed clean water distribution of 372,48 m<sup>3</sup>/ day. Compared by using conventional plumbing tools is 66,72 m<sup>3</sup>/hari, meanwhile non-conventional plumbing tools is 39,60 m<sup>3</sup>/hari, it shown that using non-conventional plumbing tools standard is more saving than conventional standard, where percentage non-conventional water saving is 40,64%. Also expected that the resulting domestic wastewater will be reduced by 31,68 m<sup>3</sup>/ day. This is more important than water savings in the amount of Rp. 3.564.000 and domestic wastewater treatment costs Rp. 9.500.000.</p>
Pengaruh Konsentrasi Ekstrak Nanas (Ananas Comosus) Dan Waktu Fermentasi Pada Pembuatan Nata De Coco Dari Limbah Air Kelapa
Authors: Suzanni Mulia Aria , Munandar Aris , Saudah Saudah 
Published: April 2020

<p>Coconut water waste discharged into the environment is one of the problems in traditional markets. Coconut water waste treatment can be done simply by making <em>nata</em><em> de</em><em> </em><em>coco</em> using the starter of bacteria <em>Acetobacter </em><em>xylinum</em> obtained from pineapple extracts. The research is aimed to study the effect of the concentration of pineapple extract (<em>Ananas comosus</em>) and fermentation time in making <em>nata de</em><em> </em><em>coco</em> from coconut water waste by experimental methods. The results of <em>nata de</em><em> </em><em>coco</em> can be seen from the maximum thickness level obtained by 1.4 cm at a starter concentration of 150 ml, 200 ml, and 250 ml with a <em>fermentation</em> time of 21 days. The best quality of <em>nata de coco</em> is at 200 ml and 250 ml starter concentrations witch a content water of 13.79% and mineral content of 0.175%. The high percentage of <em>nata de</em><em> </em><em>coco</em> favorite level is the 250 ml starter concentration, based on the level of preference for color, shape, aroma, taste, and suppleness.</p>
The 2017 Trump Administration travel ban and international graduate applications at two Texas public universities
Authors: Van De Walker Dana , Slate John R. 
Published: April 2020

The purpose of this study was to determine the extent to which the Trump administration ban on individuals from 7 Muslim-majority countries (i.e., Executive Order 13769), influenced prospective international graduate applicants to two Texas institutions. Inferential statistical procedures revealed the presence of a statistically significant, sharp decline in international graduate applicants, particularly from Muslim-majority countries. From Fall 2016 to Fall 2018, international graduate applicants from non-Muslim-majority countries declined 18.36%. Over this same time period, applicants from Muslim-majority countries declined 33.37%. Most notably, applicants from the 7 countries targeted in the travel ban declined 53.93%. Concerns clearly exist regarding the effects of this travel ban on international student mobility. Implications of these findings and recommendations for future research are discussed.