GROUNDSTROKE TRAINING MODEL BASED ON SITUATION GAME FOR FIELD TENNIS ATHLETES AGED 12-14 YEARS

This study aims to create a game situation-based groundstroke forehand and groundstroke backhand training model for tennis athletes aged 12-14 years and improve forehand and backhand skills using a game situation-based groundstroke training model for athletes aged 12-14 years. The research method used is the Research & Development Research & Development (R&D) Borg and Gall method. Subjects studied were 15 people and were athletes aged 12-14 years. The results of the pre-test test obtained an average of 31.73. Then, the post-test obtained an average of 40.00. The exercise correlation coefficient before and after the exercise model was given was 0.946 with a p-value of 0.00 < 0.05, so the conclusion was significant. In the mean difference test with SPSS, the mean = 8.26667 shows the difference between the pre-test and post-test, the result of t-count = 26,183, df = 19 and p-value = 0.00<0.05, which means there is a significant difference between before and after being given game situation based groundstroke training model treatment. Based on these results, it can be concluded that the game situation-based groundstroke training model for tennis athletes at the age of 12-14 years is effective and can improve the forehand groundstroke.

Analysis of the Effect of Covid-19 on Stock Prices in IDX30

The Covid-19 pandemic has hit Indonesia since March 2020 until now. This health disaster has affect Indonesia's macroeconomic conditions and the performance of many companies. The study examined the effect of the Covid-19 pandemic on the stock prices of all companies included in the IDX30 Index. The hypothesis test used is the average difference test. The results of the study found that the Covid-19 pandemic could have a positive, negative, or no effect on the stock prices of companies included in the IDX30 Index.

Efektivitas Larva Black Soldier Fly (Hermetia Iilucens) dalam Mereduksi Sampah Organik

The composition of waste in Indonesia is dominated by organic waste. The waste processing process must be improved to prevent pollution in the market environment. The bioconversion process using Black Soldier Fly larvae or maggots is an effective way to process organic waste. The aim of this study was to determine the effect of feeding on the initial maggot biomass to the addition of the final maggot biomass, determine the maximum maggot weight and determine substrate consumption. This quantitative research used a completely randomized design method consist of five treatments and four replications. The various feeding between total feed and larva were A treatment (270 gram: 150 gram), B (210 gram : 150 gram), C (150 gram : 150 gram), D ( 90 gram : 150 gram) and E ( 30 gram : 150 gras). The data analysis technique used variance test and Duncan’s mean difference test. The result showed that the addition of coconut pulp feed affects to the final weight of the maggot and the value of substrate consumption. The addition of coconut dregs feed which maximally affects to the final weight of the maggot showed in A treatment which ratio coconut dregs: larva (270 gram : 150 gram). The A treatment gave an average final weight of maggot 195 grams in 18 days. The maximum reduction of coconut dregs in the bioconversion process was observed in treatment E with a substrate consumption value of 55%.

Anomali Pada Bursa Efek Indonesia

Anomaly occurs when the return earned is not in accordance with the value it should be and makes the capital market inefficient. The anomalies tested were the day of The Week Effect, Week Four Effect, January Effect and Sell In May And Go Away. The population used is 144 Manufacturing stocks listed on the Indonesia Stock Exchange. The data analysis technique used to prove the occurrence of anomalies is the Z-value large sample difference test. This study examines anomalies not only in the short term, but also in the long term. The research results prove that there are no anomalies in manufacturing companies in Indonesia in the long run. In the short term, anomalies can occur, namely the sell in May effect in 2015 and the January Effect in 2017 on manufacturing companies on the Indonesia Stock Exchange.

PERBANDINGAN KINERJA PORTOFOLIO SAHAM DI JAKARTA ISLAMIC INDEX DAN IDX30 PERIODE 2016–2018

ABSTRAKPenelitian ini bertujuan untuk mengetahui perbedaan antara kinerja portofolio saham Jakarta Islamic Index (JII) dan IDX30 periode 2016–2018. Jenis penelitian ini adalah penelitian verifikatif dengan metode explanatory survey dan menggunakan teknik statistik komparatif. Penelitian ini menggunakan metode analisis Markowitz dengan pendekatan minimum variance. Sampel yang digunakan adalah 189 saham Jakarta Islamic Index (JII) dan 200 saham IDX30. Hasil pengujian kinerja portofolio dengan menggunakan uji beda independent sample t-test, tidak terdapat perbedaan antara kinerja portofolio Jakarta Islamic Index (JII) dengan kinerja portofolio IDX30. Kemudian, dari hasil perhitungan Sharpe Ratio pada Jakarta Islamic Index (JII) dan IDX30 pada setiap periodenya bernilai positif. Hal ini menunjukkan bahwa portofolio dari kedua indeks selalu memperlihatkan kinerja yang bernilai positif atau baik. Implikasinya adalah tidak ada return tambahan yang dapat diperoleh investor dengan cara membedakan saham yang memiliki kiteria syariah dengan yang bukan syariah. ABSTRACTThis study aims to determine the difference between the performance of the Jakarta Islamic Index (JII) and IDX30 stock portfolios for the 2016–2018 period. This type of research is a verification research with an explanatory survey method and using comparative statistical techniques. This research uses Markowitz analysis method with Minimum Variance approach. The sample used is 189 shares of Jakarta Islamic Index (JII) and 200 shares of IDX30. The results of portfolio performance testing using the independent sample t-test difference test, there is no difference between the performance of the Jakarta Islamic Index (JII) portfolio and the performance of the IDX30 portfolio. Then, from the results of the calculation of the Sharpe Ratio on the Jakarta Islamic Index (JII) and IDX30 in each period it is positive, this shows that the portfolios of the two indexes always show positive or good performance. The implication is that there is no additional return that can be obtained by investors by distinguishing stocks that have sharia criteria from those that are not sharia.

Correlation of Nitrite Oxide with Severity and Survival Rate of Sepsis Patients

The objective of this research was to determine the correlation between Nitric Oxide (NO) levels with the severity ofsepsis, to describe the kinetics of NO levels, and to evaluate it in predicting mortality. This research was a longitudinal cohortobservational analytical study. The variables were serum NO levels and SOFA scores, which were serially evaluated. Thecorrelation test and difference test were used for statistical analysis. The survivor and the non-survivor group consisted of 14(41.18%) and 20 (58.82%) patients, respectively. There was a correlation between serum NO levels and the SOFA score at the24-hour observation (r=0.403; p=0.041). Non-parametric Mann-Whitney test showed that there was no kinetics of NOth levels at 0, 24, 72, and 144-hour observation (p-values =0.897 and 0.703, respectively). NO levels > 111,16 μmol/L at the 24hour could predict the risk of death with hazard ratio 4.7 compared to NO levels < 111,16 μmol/L. The survival rate ofpatients with serum NO levels <111,16 μmol/L and > 111,16 μmol/L was 83.3% and 37.5%, respectively. There was acorrelation between serum NO levels and SOFA scores at the 24-hour observation. However, there was no kinetics of NOlevels at serial evaluations. Nitric oxide levels with a cut-off of 111,16 μmol/L at 24 hours could predict the survival of septicth patients. Utilization of serum NO level at 24 hour can be used to evaluate the severity of septic patients and aggressivemanagement if there is an increase in serum NO levels > 111,16 μmol/L at 24 hours.

The application of discord as an effort to increase students’ wellbeing in physical education learning during the COVID-19 emergency

Physical education learning in high school during the current Covid-19 emergency, teachers have difficulty delivering material, controlling, evaluating, and providing learning feedback, especially on basic competencies that contain motion. The research objective was to improve students’ wellbeing in high school physical education learning during the Covid-19 emergency by implementing the disdcord application. Students’ wellbeing in this study, the researcher described three indicators of achievement, that is: 1) appropriateness of learning, 2) student satisfaction in learning, and 3) improved learning outcomes. The research method used was a pre-experimental one group pre-test post-test design. The population was the students of SMAN I Kota Banjarbaru class X totaling 8 classes. Two classes of samples were selected by random technique. The learning implementation instrument and student satisfaction with learning used a questionnaire with a likert scale, while for learning outcomes using a push-up test and sit-up test. The data analysis technique used the t-test sample paired test. The results of the study showed an increase in students’ wellbeing in terms of; 1) a significant increase in the implementation of learning seen from the value of the two-tailed difference test (2-tailed) = 0.000 < 0.05, 2) a significant increase in student satisfaction in learning seen from the two-way difference test value (2-tailed) = 0.000 < 0.05, and 3) a significant increase in student learning outcomes seen from the two-way difference test value (2-tailed) = 0.000 < 0.05. The conclusion of the research is that the application of the discord application in learning physical education in high schools during the Covid-19 emergency improves students’ wellbeing.

Community Behavior in Controlling Aedes aegypti Mosquito Breeding Places before and during the Covid-19 Pandemic

The COVID-19 epidemic has brought more people into their homes, so it is hoped that their behavior towards dengue mosquito nests in their homes will improve. The design of this study was cross-sectional with a consecutive sampling approach in data collection, which was conducted between May 6, 2020 – May 9, 2020, in Indonesia. Data was collected using a questionnaire (google form) which was assessed with ten indicators. Data analysis was carried out by using the average difference test to determine differences in people’s behavior. The analysis results showed no significant difference (p>0.005) with the community’s behavior in controlling the dengue vector before and during the pandemic. Suggestions that need to be made are continuous education about DHF and efforts to prevent transmission by eradicating mosquito nests.

ANALISIS CUSTOMER PROFITABILITY PADA KOPERASI SIMPAN PINJAM “DIASPORA”

The purpose of this study was to analyze Customer Profitability in the Diaspora Savings and Loans Cooperative (Credit Union). This research is a comparative quantitative research. The consumers studied were limited to debtor customers only. There are 4 consumer groups studied, where each group consists of 30 customers. Data were collected by using a documentary study technique by examining credit contracts and financial statements of each customer. The data were analyzed by means of a mean difference test with an independent sample t-test technique. The results showed that the groups of consumers who gave the highest profitability were the cheap and passive groups. Meanwhile, the consumer group that tends to harm the cooperative is the aggressive group. Thus, it is suggested to the cooperative manager to increase the number of consumers in the cheap and passive groups and reduce the number of consumers in the aggressive group.

COMPARATIVE ANALYSIS OF ADVANTAGES OF COFFEE FARMING WITH DIFFERENT CULTIVATION SYSTEMS AND PLANTING DISTANCES

Coffee plants in general are one of the plantation commodities that are suitable for smallholder plantations because they can produce fruit throughout the year. Coffee production can be used as a source of daily or weekly income for the community. The problem in the upstream subsystem is that the productivity of Indonesian coffee plants is still below its normal potential and tends to decrease. One of the reasons for this low productivity is the cultivation system, starting from maintenance, pruning and fertilizing, as well as plant spacing. The difference in treatment in the coffee cultivation system will also affect the profits that will be obtained by farmers. This study aims to analyze the differences in the profits of coffee farming with a spacing of 2.5 x 2.5 m with a spacing of 1.5 x 1.5 m and different cultivation systems. This research uses descriptive quantitative method using profit analysis and profit difference test. The results showed that the spacing of 1.5 x 1.5 m is more profitable than the spacing of 2.5 x 2.5 m. This happened because the population per hectare at a spacing of 1.5 x 1.5 m was 4,444 plants accompanied by very intensive care, while at a spacing of 2.5 x 2.5 m the population was only 1,600 plants. The follow-up to the results of this research will be submitted to the Sinta-2 journal by preparing articles according to the format given to the journal in question. This happened because the population per hectare at a spacing of 1.5 x 1.5 m was 4,444 plants accompanied by very intensive care, while at a spacing of 2.5 x 2.5 m the population was only 1,600 plants. The follow-up to the results of this research will be submitted to the Sinta-2 journal by preparing articles in accordance with the format given to the journal in question. This happened because the population per hectare at a spacing of 1.5 x 1.5 m was 4,444 plants accompanied by very intensive care, while at a spacing of 2.5 x 2.5 m the population was only 1,600 plants. The follow-up to the results of this research will be submitted to the Sinta-2 journal by preparing articles in accordance with the format given to the journal in question.