bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparative analysis of experimental investigations and numericalsimulation of single-row finned tube bundle at mixed convection
Authors: Marshalova G. S. , Sverchkov S. A. 
Published: January 2019

Mixed convective heat transfer is very important for a wide class of engineering tasks. However, the experimental study of mixed convection requires significant implementation costs, high-power equipment, as well as large time costs, so it is proposed to expand the scope of experimental studies using numerical simulation. Numerical simulation of the single-row bundle consisting of bimetallic finned tubes at mixed air convection conditions was performed and experimental data were compared. The formulation of the third-dimensional problem for numerical simulation was realized. The conjugated problem for heat exchange modeling from the tube fins to air was solved. In numerical simulation of air momentum it was taken into account that the Reynolds number based on tube diameter and velocity in the space between fins was varied from 100 to 720. Menter’s k–ω shear stress transport model in standard formulation was used to close the Reynolds equations. Flow visualization on the tube surface revealed the transient nature of the air flow. The temperature distribution visualization in the bundle and the exhaust mine made it possible to see the nature of cooling the finned bundle at mixed convection. Results of numerical simulation and experimental investigations are in good agreement and can be used for expansion of the scope of experiments. The experimental data and the numerical simulation results for the single-row bundle consisting of bimetallic finned tubes at mixed air convection are compared in this paper. Flow near tube surfaces was visualized, and the temperature and velocity distributions in a bundle and in the exhaust mine were obtained.
Modeling of the technological process of convective drying of lumber
Authors: Sychevskii V. A. 
Published: January 2019

A calculation of the technological process of lumber drying in convection drying chamber of periodic action is presented. For this purpose, a three-dimensional geometric model of a drying chamber with a lumber pile is developed. A physico-mathematical model describing the processes of heat and mass transfer both in the drying agent and in the stack is presented. The three-dimensional geometry of the problem was taken into account by using the Ansys Fluent package. The process of mass transfer in wood was described on the basis of User-Defined Function and User-Defined Scalar. The result of calculation of a specific technological regime of drying of stack from pine sawn timber is given, which allowed finding detailed spatial distributions and temporary changes of the temperature and humidity fields for the drying agent and wood. On their basis, graphs of the time variation of the mean values are plotted. The nonlinearity and interrelationship of the processes of heat and mass transfer in a convective drying chamber leads to unsteadiness of the drying process. So, during the warm-up stage, it is not possible to avoid moisture removal from the lumber. At the drying stages, the unsteadiness leads to an oscillatory character of changes of the temperature, the mass fraction of vapour and the relative humidity of air in the gaps between the wood boards at the intensive heat input. Therefore, it is necessary to take additional procedures to keep the drying agent parameters constant at the drying stages. The obtained results can be used for the design of drying chambers and the development of drying regimes of lumber based on the mathematical modeling and computational experiment.
Simulation of m-phase active voltage rectifier with space-vector modulation
Authors: Panteleev S. V. , Malashin A. N. , Kaleda A. E. 
Published: January 2019

The autonomous power supply system (APSS) from synchronous magnetoelectric generator and active voltage rectifier (AVR) maximally meets the requirements of the minimum specific mass and the complete coordination of the primary electric power source with the load. With multiphase (m > 3) execution of the electric machine, it is possible to obtain a trapezoidal electromotive force (EMF) and increase the specific power conversion provided that the EMF and the current at the output of the m-phase generator are fully matched. Therefore, the aim of the work is to synthesize the space-vector modulation (SVM) algorithm of the active voltage rectifier to fully match the primary source of electrical energy with the load under the condition of a trapezoidal EMF of the generator. Synthesis of the PVM algorithm for the m-phase AVR is based on the use of a vector-matrix mathematical apparatus. Using the example of a nine-phase system, a SVM algorithm has been developed, the feature of which is the transformation of the generalized voltage vector m-phase coordinate system into (m – 1)/2 voltage vectors with different angular velocities in two-phase orthogonal stationary αβ coordinate systems. At the same time, based on the developed PVM algorithm, it is possible to independently control the (m – 1)/2 voltage vectors in the corresponding αβ planes, providing a signal similar to the EMF of the generator at the input terminals of the AVR. In order to confirm the theoretical propositions, an imitation model of the space-vector modulation unit for the realization of trapezoidal signals at the terminals of a nine-phase AVR has been developed. The efficiency of the developed algorithm is confirmed by the results of simulation modelling. As a result of the evaluation of the energy parameters (operating power) of the phase of power supply system direct current, it is established that the application of the developed space-vector modulation algorithm for the active voltage rectifier in order to fully match the trapezoidal shape of the EMF and the current at the output of the m-phase generator will increase the power of the APSS by 14 % compared to a power supply system of direct current with a sinusoidal form of the EMF and the current of the generator phase. It is established that the developed measuring device can be used to establish the presence of defects like “delamination”. The influence of the depth of the defect placement on the measured parameters is shown.
Application of the impact microindentation method for estimation of the mechanical characteristics and defects of the structure of carbon-base composites
Authors: Kren A. P. , Delendik M. N. , Pratasenya T. A. , Kinzhagulov I. Y. 
Published: January 2019

The problems of measurement the physical and mechanical properties of carbon materials by the dynamic microindentation method are considered. The description of the gage design for measurements is given. This gage allows creating different initial energy for straining of the material tested. It is shown that the design of the gage and the device allows testing both integral (in a large volume of straining) values of the hardness and the elastic modulus, and values of these characteristics for different structural components of the carbon-carbon composites materials: carbon rods and pitch. The obtained data confirms the possibility of using the accepted elastoplastic model of straining of the materials tested for the determination of the elastic modulus and hardness. The ratio between the dynamic and static characteristics is derived. Samples from such carbon materials as pyrolitic graphite, silicified graphite, graphite PPG, coal-filled PTFE and polyamide have been certified. Using these samples it was shown that the dynamic indentation method allows determining the elastic modulus in the range from 0.5 to 100 GPa and the hardness of indentation in the range from 20 to 550 MPa with an error not exceeding 10 %. It is established that the developed measuring device can be used to establish the presence of defects like "delamination". The influence of the depth of the defect placement on the measured parameters is shown.
ANALISA PERBANDINGAN DIFERENSIASI PRODUK PADA RADUSA.CO DAN MAPLE_ID
Authors: Bernik Merita , Dwinandita Thifal Al thavia 
Published: January 2019

In Indonesia the fashion business developments take place quite rapidly. Along with the increased efforts in the field of fashion, causing competition among entrepreneurs engaged in the same field. Various strategies drawn up by the employers in order to win or retain its position as market leader. There are many businesses especially fashion handbags are such change or modify the appearance of the product. When talking about the uniqueness of bags for teenagers and adults may employers bag will compete to create innovative products to create a variety of sizes and colors, unlike the case with the children's work unique bags are bags production Radusa Company and Maple Indonesia. The objective of this study was to compare product differentiation of Radusa Company and Maple Indonesia and to know that consumers have been able to identify well the product differentiation that had been produced compared to their competitors The research method used is a mix method that is quantitative method and qualitative method, to be able to describe a certain condition about product differentiation at Radusa Company and Maple Indonesa. The sampling technique used is nonprobability sampling with purposive method, where the sample is the consumer who is at least 16 years old. For each company taken a sample of 30 consumers. The results of this study indicate that the outline of Radusa Company has differentiated the product in terms of shape, quality of performance, suitability of quality, durability, reliability, ease of improvement and style. While Maple Indonesia has a differentiation of products viewed from the form, features, quality performance, quality conformance, durability, reliability, ease of improvement and style. Based on the respondent's statement about the comparison of product differentiation and Wilcoxon test, it is found that Radusa Company is better than Maple Indonesia
PENGELOLAAN GUDANG LOGISTIK KEMANUSIAAN BNPB
Authors: Rachmat Hidayat Raden Didiet , Firdaus Mohammad Iqbal , Lesmini Lis 
Published: January 2019

The right storage of logistics and equipment intends to have the correct and accurate quantity to mobilize during the disaster happens. This study investigates the warehousing management activities of the National Disaster Management Authority (BNPB) in XYZ warehouse located in North Jakarta in 2014. This study was conducted using a qualitative approach because it wanted to clearly and deeply describe the warehousing management activities in implementing the warehousing guidelines that have been assigned. The authors found that warehousing management activities carried out by the National Disaster Management Authority (BNPB) complies with the regulations of the Head of National Disaster Management Authority No. 6 of 2009 on Warehousing Guidelines.
DAMPAK KINERJA BAURAN PEMASARAN TERHADAP KEPUTUSAN KULIAH CALON MAHASISWA POLITEKNIK X CIMAHI
Authors: Suharyanto Suharyanto 
Published: January 2019

The higher education service providing become one of business which needs hard working especially in student recruitment. The alumni of vocational high school (SMK) and general high school (SMA) who will to continue study in higher education, can become to be opportunities. To keep these, the higher education institutions have to compete with the others, applying right marketing mix. This research article shows the marketing mix performance effects to student candidates decision to study in Polytechnic X Cimahi. The research population are student canditates in academic year of 2017, and 50 samples were got simple randomly. The effects of marketing communication mix and marketing mix to student decision analysed using simple linier regression model. The research result shows that variables of marketing mix performance gives medium effects 61,4% to student decision, and 38,6% effected by others. The linier regression model constructed is Y= 0,690X +1,248.
ANALISIS PENGENDALIAN KUALITAS TERJADINYA CACAT PADA PROSES PRODUKSI ADJUSTER R KWB (Studi Kasus di PT. Dina Karya Pratama. (Cicadas-Bogor)
Authors: Dharmayanti Indrani , Rahayu Ajeng 
Published: January 2019

This study aims to find out the production process of Adjuster R KWB (a part of automotive sparepart), the defect analysis and causes in PT. Dina Karya Pratama. It is a manufacturing company engaged in metal industry, especially automotive,. Quality control analysis is done using statistical called seven tools consisting of check sheet, p control chart, pareto diagram, and cause and effect diagram to answer those problems. The results of analysis show that the production process is controlled by the average proportion of defects (0.0071283). The level of disability is dominated by screw jam (50%) and circle not symmetry (35%). The main factors causing the defect are the engine factor that has not been hot, the method factor and the inaccuracy of labor.
HUBUNGAN ANTARA METAKOGNISI DAN MOTIVASI BERPRESTASI DENGAN KREATIVITAS
Authors: Matulessy Andik 
Published: January 2019

Abstract, The research was conducted to find out the relationship between the metacognition and the achievement motivation and the creativity. The subject of the research was the first semester students of Counseling Department academic year 2011/2012 Nusantara PGRI University Kediri. The instrument used was the creativity scale, the metacognition scale, and the achievement motivation scale. The result of the research showed that metacognition and achievement motivation was significantly associated with the creativity shown by the calculated F value 63,084 and the significance of 0,000 (<0,05). The result of determination is 0,508. It means that 50,8 % independent variables (metacognition and achievement motivation) gave contribution to dependent variable (creativity). The result of partial correlation analysis showed that there is a very significant relationship between metacognition and creativity. There is a very significant positive relationship between achievement motivation and creativity.Â Keywords : creativity, metacognition, and achievement motivation
EFIKASI DIRI AKADEMIK, DUKUNGAN SOSIAL ORANGTUA DAN PENYESUAIAN DIRI MAHASISWA DALAM PERKULIAHAN
Authors: Prastihastari Wijaya Intan 
Published: January 2019

Abstract. The main purpose of this research is to know whether there is connection between self efficacy academic and social support parents with self adaptation of University Students. The research subject was 100 University Nusantara PGRI Kediri students consisting of 42 boys and 58 girls which was taken random and having caractesistis of the first grade of the University students and staying together with their own parents. The data of the self adaptation of the University students was obtained from the scale of self actualization. The data of the scale self efficiacy academic was also obtained from the scale of self efficacy academic. The data of social support parents was received from the scale of social support parents. The resulf of this analysis of multiple regression are from maximum R = 0,684; F = 42,717; p = 0,000 (p < 0,01). The resulf of this data analysis showing that the self efficacy academic and social support are integrated to self adaptation of the University students. The result of the analysis academic self efficacy correlation with self actualization of the University students was obtained r partial = 0,632; t = 8, 039 with p = 0,000 (p < 0,01). This data shows that there is positive correlation between academic self efficacy and self actualization. The hypothesis of the research classifying that there is correlation between them and it is acceptable. The out come of the analysis social support parents correlation with self adaption of the University students was attained r partial = 0,159; t = 1,582 with p = 0,117 (p > 0,05). This data indicates that the variable of the social support is isolated and it is not related to the self adaptation. The hypothesis of the research indicates that there is positive connection between social support and self actualization and there fore it is unacceptable or avoided. This is because of another factor that influences self adaptation of the University students a part from social support of the parents.Â Key word: Self adaptation, Self efficacy academic, Sosial support parents.Â
KEMATANGAN EMOSI, KONSEP DIRI DAN KENAKALAN REMAJA
Authors: Binti Muawanah Lis 
Published: January 2019

Abstract, Emotional maturity, self-concept, and juvenile delinquency examined on 120 middle adolescents. Researcher developed three research instrument of measurement, namely the scale of juvenile delinquency, the scale of emotional maturity, and the self-concept scale. Data analyzed with the multiple regression. Varians proportion of juvenile delinquency can be explained through the emotional maturity and self-concept. Emotional maturity and self-concept simultaneously predict delinquency in unidirectional and linear relationships; Emotional maturity is a psychological capacity that has the potential to allow a decline in juvenile delinquency; Self-concept is a psychological capacity that no potential to allow the reduction or increase in juvenile delinquency. Juvenile delinquency data not normally distributed and relatively high. Prediction research findings apply only to groups of adolescents with high delinquency rates. The findings are discussed in terms of their implications for middle adolescent in context.Â Key words: maturity of emotion, self-concept, juvenile delinquency
Pengembangan Skala Kemandirian
Authors: Suharnan * 
Published: January 2019

Abstract. One of the most problems that often faced by researchers is unavailable of instruments to measure variables. Therefore, the present research purposed to develop independent scale as one of some psychological measures which could be used to studies in the future. The independent scale was constructed according to psychometric prosedures and consists of the number of items composed of four components. This research was conducted in two studies, and including 331 subjects (male and female) of students coming from some high schools and a university. Statistical analyses were used to examine data of the scale. Results showed the constructed independent scale was reliable and valid to measuring independent behaviors of individuals.Â Keywords: independent scale, measurement
Kepercayaan Diri, Kematangan Emosi, Pola Asuh Orang Tua Demokratis dan Kenakalan Remaja
Authors: Fatchurahman M. 
Published: January 2019

Abstract, The aims of this study is to investigate the correlations among the self-confidence, emotional maturity and the democratic-parenting with the youth delinquency. The subjects of this study were 46 students of class X of SMK Muhammadiyah,Malang. Based onÂ the correlation and the regression analysis were obtainedÂ there were no correlation among theÂ emotional maturityÂ variable and the democratic parentingÂ with the youth delinquency. ExpectionallyÂ the self-confidence, there was significant and negative correlation with youth delinquency. The more self confidence, the less youth delinquency. Keywords: Self-confidence, emotional maturity, democratic parenting, youthÂ delinquency.
Percaya Diri, Body Image dan Kecenderungan Anorexia Nervosa Pada Remaja Putri
Authors: Ratnawati Vivi 
Published: January 2019

Abstract. This study aims to find whether there is a relationship between self-confidence and body image with the trend of anorexia nervosa in adolescent princess.Â Subjects of the study wereÂ 120 studentÂ of SMK Negeri 2 Kediri. Three scales were used to collect data and then this data were analysed by multiple regression with stepwise method. The results showed self-confidence and body image together giveÂ to the tendency of anorexia nervosa. Based on the results the hypothesis proposed in this study can be accepted, that there is a negative relationship between self-confidence and body image with the trend of anorexia nervosa. The effective contribution of each individual predictor,Â self-confidence to have a role that is 9,1% while body image that is 26,1%.Keywords : Self-confidence, body image, anorexia nervosa
Kematangan Emosional, Percaya Diri dan Kecemasan Pegawai Menghadapi Masa Pensiun
Authors: Sutrisno Edy 
Published: January 2019

Abstract. This study aimed to determine the relationships between emotional maturity, self-confidence and the anxiety to face retirees. Subjects were 60 civil servants who are resident residing in the Territory Housing Complex Tandes. Data retrieval tool used is the scale emotional maturity, self-confidence scale and face the anxiety scale pension. Data were analyzed by using multiple reggression. The results showed: first, there was a negative relationship between emotional maturity and anxiety civil servants. It showed when one's emotional maturity is high, then the anxiety state employees retirement will decrease. Second, showed that there was a negative relationships between self-confidence and anxiety civil servants. whenÂ self-confidence is high, then the anxiety state employees retire-ment will decrease.Key Words: emotional maturity, self-confidence and employeeâ€™s anxiety inÂ fa-cing the future pension.
Perbedaan Motivasi Belajar dan Percaya Diri Antara Siswa Yang Berasal Dari Keluarga Utuh Dengan Keluarga Broken Home
Authors: Rakhmawatiningtyas Sustin 
Published: January 2019

Abstract. The main purposes of this research are to find the differences of learning motivationÂ Â and self-confidence of students come from intact family or peace family and the broken family. The subjects in this study were 100 students come from SMA Negeri I Panji Situbondo. They were 50 students from intact families and 50 students from families broken home. Data analysis was used statistical t-test. Results showed learning motivation of students come from intact families is more high than student from broken families. Adversly, students come from intact families are less confident than students from broken families. Further, the results will be discussed in this article.Keywords: intact family and broken, learning motivation, self-confidence
Kematangan Emosi, Religiusitas Dan Perilaku Prososial Perawat Di Rumah Sakit
Authors: Dwi Haryati Tutik 
Published: January 2019

Abstract. The purposes of this study were to determine the relationships between emotional maturity and religiosity with nursesâ€™ prosocial behavior at hospital. Research samples were nurses working at Mother Hospital Surabaya total of 61 people. Data were collected by the scales of emotional maturity, religiosity and prosocial behavior. Studies using multiple regression analysis. Results of research were as follows: First, there was a positive and significant relationship between emotional maturity and religiosity with nursesâ€™ prosocial behavior. Second, there was a positive and significant relationship between the emotional maturity and prosocial behavior of nurses. Third, there was a significant and positive relationship between religiosity and Â nursesâ€™ prosocial behavior.Keywords: emotional maturity, religiosity and nurseâ€™ prosocial behavior