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All Journal Jurnal Dinamika Penelitian Industri International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) Jurnal Price : Ekonomi dan Akuntasi
A. Mahendra
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Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Industrial & Manufacturing Engineering

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Model pengembangan formula kompon vulkanisir ban luar dump truck dengan filler fly ash Nasruddin .; Sudirman .; A. Mahendra; A. Haryono
Jurnal Dinamika Penelitian Industri Vol 25, No 1 (2014): JURNAL DINAMIKA PENELITIAN INDUSTRI
Publisher : Balai Riset dan Standardisasi Industri Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (613.304 KB) | DOI: 10.28959/jdpi.v25i1.678

Abstract

Retread tire dump trucks imported and local characterization has been performed as a basis for modeling the development of a formula dump truck tire retreading. Materials used include natural rubber SIR 20, Thermoplastic Elastomer (inserting ETP), carbon black, silica and fly ash. The test results showed that the addition of the ETP on natural rubber SIR 20 for retread tire dump trucks can increase the hardness of 3.03%, 3.87% tensile strength, tear strong 15.46%, 100% modulus with a value of 36.28%, the modulus 300% with a value of 27.71% and 52.46% abrasion value. Testing of mechanical properties in fresh condition after aging (aging) and after ozone exposure given PPHM 25 for 3x24 hours at a temperature of 40°C shows, the addition of ETP a positive effect on some mechanical properties. The test results showed the addition of SEM-EDS ETP can protect natural rubber from ozone attack. Fly ash is added to the compound of formula has a tendency to bind to one another, so that the process of making the formula developed an innovative mixing with coupling agent Si type of PEG 400 and 69.Keywords: natural rubber, ETP, carbon black, fly ash, dump truck tire compound.AbstrakVulkanisir ban luar dump truck impor dan lokal telah dilakukan karakterisasi sebagai dasar untuk membuat model pengembangan formula vulkanisir ban luar dump truck. Bahan yang digunakan antara lain karet alam SIR 20, Elastomer Termoplastik (inserting ETP), carbon black, silica dan fly ash. Hasil pengujian menunjukkan, penambahan ETP pada karet alam SIR 20 untuk vulkanisir ban luar dump truck dapat meningkatkan kekerasan 3,03%, kuat tarik 3,87%, kuat sobek 15,46%, modulus 100% dengan nilai 36,28%, modulus 300% dengan nilai 27,71% dan abrasi = 52,46%. Pengujian sifat mekanik pada kondisi segar setelah proses penuaan (aging) dan setelah diberi paparan ozon 25 pphm selama 3x24 jam pada suhu 40°C menunjukan, penambahan ETP memberikan efek positif pada beberapa sifat mekanik. Hasil pengujian SEM-EDS menunjukan penambahan ETP dapat melindungi karet alam dari serangan ozon. Fly ash yang ditambahkan pada formula kompon memiliki kecenderungan berikatan satu sama lain, sehingga pada proses pembuatan formula dikembangkan suatu inovasi pencampuran dengan coupling agent jenis PEG 400 dan Si 69.Kata Kunci : karet alam, ETP, carbon black, fly ash, kompon ban luar dump truck.
Pengaruh kualitas layanan terhadap kepuasaan pelanggan pada CV. Martubung Jaya, Medan Sintia Yukari; A. Mahendra
Jurnal Price : Ekonomi dan Akuntasi Vol. 2 No. 2 (2024): Jurnal Price : ekonomi dan Akuntasi, Mei Edition 2024
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/jecoa.v2i2.4135

Abstract

Tujuan dari penelitian ini adalah untuk menentukan apakah ada pengaruh kualitas layanan terhadap kepuasan pelanggan di CV. Martubung Jaya, Medan. Metode penelitian yang penulis gunakan adalah metode penelitian kuantitatif asosiatif. Sampel penelitian ini adalah 20 responden di CV. Martubung Jaya, Medan, dengan menggunakan teknik purposive sampling yang merupakan teknik sampling dengan pertimbangan tertentu. Analisis data menggunakan uji regresi linear sederhana, sementara pengolahan data menggunakan SPSS 26. Hasil dari penelitian ini adalah pengaruh kualitas layanan terhadap kepuasan pelanggan di CV. Martubung Jaya, Medan, di mana koefisien regresi a = 17,120 berarti bahwa Kualitas Layanan adalah 0, maka kepuasan pelanggan positif sebesar 17,120. Hasil pengujian hipotesis menunjukkan bahwa berdasarkan uji koefisien determinasi (R2), nilai koefisien determinasi yang diperoleh adalah 0,535 atau 53,5%, sementara sisanya 46,5% dijelaskan oleh variabel lain yang tidak diteliti dalam penelitian ini, sehingga dapat disimpulkan bahwa variabel kualitas layanan mampu menjelaskan variasi yang terjadi pada variabel kepuasan pelanggan. Berdasarkan hasil uji t, menunjukkan bahwa nilai t hitung > t tabel (2,395 > 2,101). Hal ini membuktikan bahwa kualitas layanan memiliki pengaruh positif dan signifikan terhadap kepuasan pelanggan di CV. Martubung Jaya, Medan. Sehingga peneliti dapat menyimpulkan bahwa kualitas layanan berpengaruh terhadap kepuasan pelanggan di CV. Martubung Jaya, Medan.
INTEREST RATES IN INDONESIAN BANKS' ASYMMETRIC BEHAVIOR AND DEGREE OF PASSTHROUGH Tohap Parulian; A. Mahendra; Witya Shalini
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 2 No. 9 (2023): AUGUST
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijset.v2i9.207

Abstract

Interest rate changes result in a trade-off between reducing inflation and capital inflows. Capital inflow will reduce money market interest rates as low as possible, followed by lower lending and deposit rates. On the other hand, it is difficult to lower the benchmark interest rate due to inflation pressure. The asymmetric movement of lending and deposit interest rates to the benchmark interest rate has caused disturbances to the monetary transmission mechanism. The results of the estimated error-correction model for variable lending rates found that the long-term passthrough of Indonesian banks was significant but could have been better on interest rates on working capital loans and investment loans. This study shows an asymmetrical behavior in banking interest rates in Indonesia. The passthrough degree is typically slow when there is a decrease in the benchmark interest rate.
ANALYSIS OF THE INFLUENCE OF FISCAL POLICY ON ECONOMIC GROWTH WITH INVESTMENT AS A MODERATING VARIABLE IN INDONESIA Tohap Parulian; A. Mahendra; Witya Shalini
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 3 No. 8 (2024): JULY
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijset.v3i8.500

Abstract

This research aims to know the influence of tax and government expenditure on economic growth with investment as a moderating variable in Indonesia. The population in this research is Indonesia, and 24 of them were selected to be the samples for this research through a purposive sampling technique. This research uses multiple regression analysis techniques. This study's data type is secondary data, consisting of tax and government expenditure for economic growth for 2000-2024. This research showed that tax and government expenditures partially significantly affect economic growth in Indonesia. At the same time, simultaneously (f-test), Tax and Government Expenditure significantly affect the variables of Economic Growth. The investments cannot moderate the relationship between Tax and Government Expenditure on Economic Growth.
THE EFFECT OF INFLATION, UNEMPLOYMENT, AND POVERTY ON INCOME INEQUALITY IN INDONESIA Tohap Parulian; Elcy Handayani Pramita; A. Mahendra
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 4 No. 2 (2025): JANUARY
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijset.v4i2.668

Abstract

This research is intended to know the influence of inflation, unemployment and poverty on income inequality in Indonesia. Population in this research is Indonesia and 24 of them were selected to be the samples for this research through purposive sampling technique. Estimates conducted by the multiple regression analysis. The data that were used in this study were secondary data, consisted of Inflation, Unemployment and Poverty on Income Inequality for the year 2000-2023. The results of this research, that Based on the partial test (t test), the Unemployment and Poverty have significant effect on the Income Inequality in Indonesia. Meanwhile the Inflation has not significant effect on the Income Inequality. Based on the simultan test (F test), Inflation, Unemployment and Poverty have a significant effect on the Income Inequality.
ANALYSIS OF THE INFLUENCE OF WORLD OIL PRICES, WORLD GOLD PRICES, AND THE DOW JONES INDEX ON THE COMPOSITE STOCK PRICE INDEX IN INDONESIA A. Mahendra; Witya Shalini; Mutiara Pulungan; Abdul Haris; Syarifuddin Hz Nasution
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 4 No. 6 (2025): MAY
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijset.v4i6.758

Abstract

This study aims to determine the effect of World Oil Prices, World Gold Prices, and the Dow Jones Index on Indonesia's Composite Stock Price Index. The population in this study is Indonesia, and 25 of them were selected as samples of this study through purposive sampling techniques. Estimation is done by multiple regression analysis. The data used in this study are secondary data consisting of World Oil Prices, World Gold Prices, and the Dow Jones Index on the Composite Stock Price Index in Indonesia in 2000-2024. The results of this study indicate that, based on the partial test (t-test), World Oil Prices, World Gold Prices, and the Dow Jones Index significantly affect the Composite Stock Price Index variable in Indonesia. In contrast, the simultaneous test (F-test) of World Oil Prices, World Gold Prices, and the Dow Jones Index simultaneously significantly affects the Composite Stock Price Index variable.
Co-Authors A. Haryono Abdul Haris Elcy Handayani Pramita Mutiara Pulungan Nasruddin . Sintia Yukari sudirman . Syarifuddin Hz Nasution Tohap Parulian Witya Shalini