scholarly journals Estimation of stator and rotor forms distortions influence on operating parameters of a hydrogenerator

2021 ◽  
Vol 2094 (5) ◽  
pp. 052036
Author(s):  
A A Achitaev ◽  
N S Savelieva ◽  
N S Naumkin ◽  
A G Rusina
Keyword(s):  
Significant Contribution ◽  
Air Gap ◽  
Field Calculation ◽  
Average Value ◽  
A Value ◽  
Ohmic Losses ◽  
Nominal Voltage ◽  
Power Mode ◽  
Rotor Shape ◽  
Diameter Change

Abstract The field calculation was carried out using finite element method of the Ansys Maxwell software package and verification in the Matlab Simulink software. It should be noted that there are several regulatory documents that describe criteria for permissible distortion of the rotor shape, where the air gap between the stator and the rotor at diametrically opposite points should not differ from each other by more than ± 20% from the average value equal to their halfsum. In this work, a calculation was carried out covering this interval of diameter change; an analysis was carried out considering change in range of ± 35% of the air gap’s width’s value. Results of the research showed that a change in a value of the air gap up to 10% would make a significant contribution to magnitude of magnetic field induction, which increases the value of main losses in a core of magnetic circuit of the generator. Also, there is a significant decrease in voltage (from 25 to 50%) of a nominal voltage in nominal power mode, which requires increase in current in field magnetizing coil, leading to ohmic losses’ increase in rotor’s windings.

EFFECT OF ZINK TABLETS INTERVENTION IN ZINC DEFICIENCY OF TRIMESTER III PREGNANT WOMEN TOWARD WEIGHT AND BODY LENGTH OF NEWBORN

2021 ◽  
Vol 10 (2) ◽  
pp. 304-312
Author(s):  
Nurfadillah S ◽  
Wardihan Sinrang ◽  
Suryani As'ad ◽  
Muh. Nasrum Massi ◽  
Mardiana Ahmad ◽  
...  
Keyword(s):  
Birth Weight ◽  
Pregnant Women ◽  
Zinc Deficiency ◽  
Birth Length ◽  
World Health ◽  
Third Trimester ◽  
Average Value ◽  
The Third ◽  
A Value ◽  
Zinc Levels

Background: According to 2018 World Health Organization (WHO) data globally, an estimated 17.3% of the population has inadequate zinc intake, with estimates ranging from 5.7% in Oceania to 7.6% in Europe, 9.6% in America and the Caribbean, highest in Africa (23.9%) and Asia (19.6%). Zinc is important for the function of a number of enzymes and growth hormones during pregnancy. In pregnant women, the relative zinc concentration decreases up to 35% due to the influence of hormonal changes and the transport of nutrients from mother to baby. Objectives: The purpose of this study was to identify the effect of giving zinc tablets to pregnant women with zinc deficiency in the third trimester on body weight and length of babies born at the Makassar City Health Center. Methods: This type of research is True Experimental with a pretest-posttest design with a control group. The sample in this study was 62 samples of third trimester pregnant women, and the sampling technique used was purposive sampling. Measurement of zinc levels in third trimester pregnant women using the Elisa reader kit at the Research Laboratory of the Hasanuddin University Teaching Hospital. The research instruments were in the form of a research explanation sheet, respondent's consent sheet, respondent's checklist sheet, and the mother's zinc tablet consumption control sheet for 14 days. Results: Judging from the average value of newborns in pregnant women who did not have zinc deficiency, the average value of birth weight in pregnant women with zinc deficiency was 15.70 g/dL and 18.95 g/dL. zinc deficiency with a value (p < 0.05), while pregnant women with zinc deficiency have an average birth length of 10.00 g/dL and mothers who do not have a deficiency of 19.87 g/dL with a value (p < 0.05). So, it can be concluded that giving zinc tablets to pregnant women in the third trimester has an effect on Birth Weight (BBL) and Birth Length (PBL). Conclusion: Giving zinc tablets has an effect on increasing zinc levels in third trimester zinc deficiency pregnant women and increasing birth weight and length of the baby.  

scholarly journals PENGGUNAAN MODEL PEMECAHAN MASALAH UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR ANALISIS PESERTA DIDIK PADA MATERI GRAVITASI NEWTON

2019 ◽  
Vol 7 (1) ◽  
pp. 25
Author(s):  
Sabaruddin Sabaruddin
Keyword(s):  
Problem Solving ◽  
Homogeneity Test ◽  
Learning Models ◽  
Final Test ◽  
Average Ability ◽  
Average Value ◽  
Analytical Skills ◽  
A Value ◽  
Post Test ◽  
Parametric Statistics

Mathematical analytics Important, analytical skills When students are able to understand analysis in physics learning, students will be able to answer questions with questions that are different from the examples given by the teacher. The aim of studying the increased thinking of participants in cognitive taxonomy analysis in Newton's law materials was approved using problem solving learning models. Hypothesis testing is done by comparing the average value of the ability of the initial test (pre-test) and the average ability of the final test (post-test) of students. The process of testing the hypothesis will test the normality and homogeneity test as a requirement to use parametric statistics, namely by using the t-test. Based on the results of the study obtained a value of tcount (8.25) and ttable value at dk = 42 with a 95% confidence level obtained at 2.02. This shows that tcount> t table. So can it be concluded that the expansion of students' thinking analysis ideas on cognitive taxonomy in the legal material used uses problem solving learning models.

scholarly journals The index of “electrical quality of the heart” allows predicting the degree of risk of fatal cardiogenic conditions in children and adolescents

2021 ◽  
Vol 1 (1) ◽  
pp. 150-154
Author(s):  
I. Yu. Melnikova ◽  
Yu. A. Tokarevа
Keyword(s):  
Quality Factor ◽  
Qt Interval ◽  
Dynamic Monitoring ◽  
Average Risk ◽  
Average Value ◽  
Diagnosis And Prognosis ◽  
Modified Method ◽  
Electrical Instability ◽  
A Value

The purpose of the research. The optimization of the method electrocardiogram’s interpretation (ECG) for diagnosis and prognosis of fatal cardiogenic situations among children and teenagers depending on the severity of myocardial electrical instability.Materials and methods. The authors propose to use a modified method for assessing the “electrical quality of the heart”, proposed by A. N. Volobuev and co-authors in order to assess the electrical instability of the myocardium among children and teenagers. There is a formula which helps to estimate the index of “electrical quality factor of the heart” among children and teenagers: D=(aR/aT):(QT/QRS), where D is the index of “electrical quality factor of the heart”, aT and aR is the amplitude of R wave and T, QT — QT interval, QRS — interval, QRS. ECG was recorded in 12 leads, ECG assessment was carried out according to generally accepted rules.Results. Based on the analysis of 234 ECG of children and teenagers from the neonatal period to 18 years, the criteria of the average value of the index of “electrical quality factor of the heart” (D) were defined, D =1,09 +/- 0,03. It is proved that the value of the index “electrical quality factor of the heart” does not depend on the sex and age of the child. There was a decrease in the index of “electrical quality factor of the heart” was revealed among children with the lengthening of the QT interval.Conclusion. The index of “electrical quality factor of the heart” in pediatric practice allows to predict the risk of fatal cardiogenic conditions, to develop tactics of dynamic monitoring of patients, to evaluate the efficiency of treatment. When D<0.55 it is possible to predict high risk, at a value of 0.55≤D<0.80 — average risk, and at D≥0.80 — low risk of fatal cardiogenic conditions among children and teenagers.

scholarly journals Hubungan antara Kedalaman Permukaan Air Tanah dengan Salinitas di Pesisir Pantai Kungkai Baru serta Penggunaan Model Discovery Learning

2018 ◽  
Vol 2 (2) ◽  
pp. 178-182
Author(s):  
Sutijo Joko Sudiro ◽  
Muchammad Farid ◽  
Eko Swistoro
Keyword(s):  
Learning Outcomes ◽  
Learning Model ◽  
Discovery Learning ◽  
High Ability ◽  
Significance Level ◽  
Average Value ◽  
A Value ◽  
Quasi Experimental ◽  
The Difference ◽  
The Relationship

ABSTRACT [Relationship between Groundwater Surface Depth with Salinity at the Coast of New Kungkai Beach and its Implementation on Discovery Learning Model]. The aims of this study were 1) to describe the relationship between groundwater surface depth with salinity in the coastal areas of new kungkai beach of Seluma, and 2) to determine the improvement of learning outcomes (cognitive) of high ability students, moderate and low by using discovery learning model on the concept of static fluid in class X computer and network engineering at SMK Negeri 3 Seluma. This research was a quasi experimental research with one groups pretest-posttest design. The results showed: 1) The relationship between depth with salinity has a value of 0.6478 with a significance level of 0.001 (<0.05); 2) Learning with discovery learning model can improve student learning outcomes on cognitive aspects (knowledge). Increased cognitive results can be seen from the average value of the initial test, the final test and the average value of gain in the class x Tkj is high-ability groups are at high criteria with a value of 0.75 gain in the group is in the criteria medium with the value of gain 0,52 and in the low group were in moderate criteria with a gain value of 0.44. There is a difference in learning outcomes between the high, medium and low groups. The difference is shown by Fcount > Ftable (4.04 > 3.35) with a significance level of 5%. Keywords: Groundwater surface depth; salinity; discovery learning model; SMKN 3 Seluma.

scholarly journals Stability of the Retinoid X Receptor-alpha Homodimer in the Presence and Absence of Rexinoid and Coactivator Peptide

2020 ◽  
Author(s):  
Zhengrong Yang ◽  
Donald D. Muccio ◽  
Nathalia Melo ◽  
Venkatram R. Atigadda ◽  
Matthew B. Renfrow
Keyword(s):  
Binding Pocket ◽  
Retinoid X Receptor ◽  
Heat Capacity Change ◽  
Scanning Calorimetry ◽  
Receptor Alpha ◽  
Average Value ◽  
A Value ◽  
Capacity Change ◽  
Differential Scanning Fluorimetry ◽  
Retinoid X Receptor Alpha

ABSTRACTDifferential scanning calorimetry and differential scanning fluorimetry were used to measure the thermal stability of human retinoid X receptor-alpha ligand binding domain (RXRα LBD) homodimer in the absence or presence of rexinoid and coactivator peptide, GRIP-1. The apo-RXRα LBD homodimer displayed a single thermal unfolding transition with a Tm of 58.7 °C and an unfolding enthalpy (ΔH) of 673 kJ/mol (12.5 J/g), much lower than average value (35 J/g) of small globular proteins. Using a heat capacity change (ΔCp) of 15 kJ/(mol·K) determined by measurements at different pH values, the free energy of unfolding (ΔG) of the native state was 33 kJ/mol at 37 °C. Rexinoid binding to the apo-homodimer increased Tm by 5 to 9 °C, and increased the ΔG of the native homodimer by 12 to 20 kJ/mol at 37 °C, consistent with the nanomolar dissociation constant (Kd) of the rexinoids. The increase in ΔG was the result of a more favorable entropic change due to interactions between the rexinoid and hydrophobic residues in the binding pocket, with the larger increases caused by rexinoids containing larger hydrophobic end groups. GRIP-1 binding to holo-homodimers containing rexinoid resulted in additional increases in ΔG of 14 kJ/mol, a value same for all three rexinoids. Binding of rexinoid and GRIP-1 resulted in a combined 50% increase in unfolding enthalpy, consistent with reduced structural fluidity and more compact folding observed in other published structural studies. Thermodynamic analysis thus provided a quantitative evaluation of the interactions between RXR and its agonist and coactivator.

scholarly journals INDONESIAN COCONUT COMPETITIVENESS IN INTERNATIONAL MARKETS

2019 ◽  
Vol 1 (3) ◽  
pp. 46-50
Author(s):  
Heriyanto Heriyanto
Keyword(s):  
Comparative Advantage ◽  
Supply And Demand ◽  
International Market ◽  
World Market ◽  
International Markets ◽  
Average Value ◽  
A Value ◽  
Constant Market Share Analysis ◽  
Constant Market Share ◽  
Derivative Products

Indonesia is one of the country's largest Coconut producer and exporter in the world market. The management efforts of Indonesia coconut not optimal, coconut export is still largely in the form of primary products, a type of derivative products coconut produced Indonesia is still limited. But in general, this research aims to analyze the Export Competitiveness of coconut Indonesia in international markets, specifically aims to analyze the position and competitiveness of Indonesia coconut commodities in the international market. Methods of data analysis using Trade Specialization Index (TSI), the analysis Revealed Comparative Advantage (RCA), and the Constant Market Share analysis (CMS). The results showed that during the period of 2005-2016, the development of supply and demand are relatively unstable and likely to rise. TSI values during the period of 2005-2016 have the value positive that shows that Indonesia is a country exporting coconut and belongs into the categories of very mature in the international market, indicated by the average value of the TSI of 1.00. The value of the RCA during the period of 2005-2016 have a value above 1 indicating that Indonesia Coconut has a comparative advantage for the commodity. While the analysis results in CMS during the period of 2005-2016 based on the four effects shows that the competitiveness of coconut Indonesia influenced by standard growth effects and efficient distribution where the coconut export growth in Indonesia is affected by the growth of coconut import world.  

scholarly journals Analysis Of Critical Thinking Skill Level Of Students Smp Negeri 2 Padang about Environmental Pollution

2018 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Novia Daniati ◽  
Dezi Handayani ◽  
Relsas Yogica ◽  
Heffi Alberida
Keyword(s):  
Middle School ◽  
Critical Thinking ◽  
Environmental Pollution ◽  
Thinking Skills ◽  
Critical Thinking Skills ◽  
Average Percentage ◽  
Average Value ◽  
Descriptive Research ◽  
A Value ◽  
Public Middle School

Curriculum of 2013 requires students to be able to think critically. This critical thinking ability can be trained by using questions that have indicators of critical thinking, besides those questions must also have cognitive levels C4 (analyze), C5 (evaluate), and C6 (synthesize). Padang Public Middle School 2 has implemented 2013 Curriculum in learning, but students' critical thinking skills are unknown. This research is a descriptive research. The method used in this research is descriptive method. The subject of the study consisted of 48 students of class VII of SMP Negeri 2 Padang. The data obtained in this study was obtained through test techniques. The test used is a description test. The test instruments used will be validated and analyzed first. Analysis of this instrument includes the level of difficulty, differentiation and reliability. Test instruments were tested before being used. This study produces data that the level of critical thinking skills of seventh grade students in Padang State Middle School is still in non-critical qualifications with a percentage average value of 48.53%. Indicators with the highest average percentage to the lowest, namely; the inference indicator obtained a score of 69.96% with quite critical qualifications; the indicator gives a basic statement obtained a value of 60.62% with less critical qualifications; the indicator estimates that a value of 53.12% is obtained with non-critical qualifications; the indicator gives an advanced statement obtained a value of 44.39% with non-critical qualifications, and; basic indicators of decision making obtained a value of 14.58% with non-critical qualifications. Keywords: Critical Thinking, Environmental Pollution, Descriptif

scholarly journals PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE MATCH MINE UNTUK MENINGKATKAN KEMAMPUAN KOMUNIKASI MATEMATIS SISWA KELAS VII DI MTs NEGERI 2 MEDAN

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Doriyani . Nasution ◽  
Izwita . Dewi
Keyword(s):  
Action Research ◽  
Cooperative Learning ◽  
Communication Skills ◽  
Learning Model ◽  
Mathematical Communication ◽  
Average Value ◽  
A Value ◽  
Model Match ◽  
The Subject ◽  
Classroom Action Research

ABSTRACTThis study aims to improve students' mathematical communication skills through the application of cooperative learning model Match Mine on the subject of integers in classVII MTs2 Medan. This type of researchis a classroom action research. The subjects were students of class VII-1 MTs 2 Terra in TA 2014/2015 which amounted to 42students. The object of this research is the students' mathematical communication skills through cooperative learning model Match Mine on  the     subject of         integers. The research instrument used is th eobservation and test mathematical communication skills. This study consisted two cycles and at the end of each cycleis given test comunication is mathematical ability. Before given, test           first      validated to the  validator. The results showed that cooperative learning model in the material Match Mine integer scan improve students' mathematical communication. It is seen from the results before action is given, the provisi on of diagnostics tests of 42 students only as many as 15 students (35.72%), which reached a value ≥ 65 with an average value of 58.18 class. After agiven action, the first mathematical communication skills tests in the first cycle, from 42 students as many as 25 students (59.52%) reached a value ≥ 65 with an average value of 66.95 class. From theanalysis ofthe test data communication capabilities mathematicalI on the second cycle of 42 people found that the students are 37 students (88.09%) reached a value ≥65 with an average value of 74.38 class. Based on observation, learning management research conducted in the first cycle, including both categories with a scoreof 2.87. Furthermore,in the second cycle, the researcher's ability to manage the learning increased to 3.40 so very good category. Based on the above results, it can be conclude edthatby implementing cooperative learning model Match Mine can improve students' mathematica lcommunication on the subject of integers in class VII MTs 2 Medan. Suggestions submitted to the seventh grade math teacher at MTs Negeri 2 Medan advis able to provide training to students that many require students to provide arguments that students' mathematical communication skills especially in explaining aspect scan be increased, as well asprovide the opportunity for students express ideas/ideas verbally/ writing in the learning process, andusing learning modelKeywords : mathematical communication, communication, secondary school, classroom action                      research, match mine.

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