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Arman Harahap
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International Journal Of Science, Technology & Management (IJSTM)
Published by CV. Inara
ISSN : -     EISSN : 27224015     DOI : doi.org/10.46729
Core Subject : Science, Education, Agriculture, Engineering,
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation
International Journal of Science, Technology & Management (IJSTM) is an international scholarly refereed research journal which aims to promote the theory and practice of science, technology, innovation, engineering and management.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 1,072 Documents
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Design and Analysis of the E-Journal Repository for Final Projects and Student Practices in the D3 Computer Engineering: (Case Study: Harapan Bersama of Polytechnik ) Ida Afriliana; M.Bahar; Abdul Basit
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.41

Abstract

Higher education institutions are the main institutions in creating young people who can be ready to enter the world of work and industry, and one of the educational programs that take part in vocational education. Vocational education is higher education that is directed at focusing certain applied skills. Harapan Bersama of Polytechnic is one of the vocational education institutions that provides Human Resources (HR) to become the younger generation as practitioners in industry, companies, or other stoke holders. In the D3 Computer Engineering Study Program, each batch can graduate approximately 300 graduates, where each graduate will produce one scientific work from the final project research conducted. Likewise, with students who do practical work (KP), every student who does KP will produce scientific papers. But all the results of this scientific work, namely the research report of the Final Project and the Job Training Report are still being submitted to the Study Program in one compact disk (CD). This turned out to be a problem for the Study Program because from each batch, around 300 compact disks (CDs) were collected from the results of scientific work from the practical work and 300 compact disks (CDs) from the final project research outputs. Physical data in the form of a compact disk (CD) requires a large space for its placement. Meanwhile, the condition of the D3 Computer Engineering study program room makes it impossible to place the physical form. And along with technological developments, this physical form can be replaced by soft files in the form of e-journals or e-reports. This needs to be done in line with the paradigm shift from conventional libraries to e-libraries. With the existence of SIPESTA or the information system for the completion of this Final Project, the results of writing scientific papers are uploaded and become a digital trace of all scientific papers that have been carried out by all D3 Computer Engineering students. And so if this data is needed it will be easy to find because the database has been well managed.
Supply Liquid Organic Fertilizer NASA and Rice Husk Ash To The Chemical Properties Of The Soil On The Tomato Plant Fitra Syawal Harahap; Rahmaniah; Roswita, Oesman; Iman, Arman
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.42

Abstract

Efforts to improve tomato production can be done with the use of organic fertilizers derived from agricultural waste, manure, green manure, manure-human waste, and compost as a substitute source of nutrients. This study aims To determine the best combination between provision of organic fertilizer POC and Rice Husk Ash On the Chemical Properties of the Soil On the Tomato Plant. This research used randomized block design factorial consisting of 2 treatment factors, namely : the Concentration of POC NASA (N) consists of 4 levels, namely: N0 = 0% ( control), N1 = 1 cc/ liter of water, N2 = 2 cc/ liter of water, N3 = 3 cc/ liters of water. Organic fertilizer Rice Husk Ash (A) which consists of 3 levels, namely :A0 = 0 tons/ ha, A1 = 15 tons/ha (158 g/polybag), A2 = 30 ton/ha (316 g/polybag). The test map used is the Duncan Multiple Range Test (DMRT). As for the observed parameters, namely soil chemical properties include soil pH Methods Elektrometri, C-organic (%) Method of Walkley and Black, P-Available (%) Method of Bray II. The results showed that the Provision of Liquid Organic Fertilizer NASA and as much as 2 cc/ liter of water is able to increase the soil pH and C-organic. Provision of 30 ton/ha or equivalent to 316 g/polybag Rice Husk Ash is able to increase P-available and C-organic.
Analysis of Stock Prices Affected by Current Ratio Nanang Suryana; Sri Dewi Anggadini
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.44

Abstract

The stock price of required on a stock exchange must be changed cannot be estimated. The purpose of this study is to study the comparative valuation of Current Ratio to Stock Prices. The method used in this research is descriptive method and verification method with quantitative discussion. The data source used is secondary data. The population in this study is the financial statements of the Retail Trade Sector Companies listed on the Indonesia Stock Exchange as many as 25 companies with financial statements consisting of statements of financial position and Stock prices approved for 5 periods (2014-2018). Based on the results of research and discussion, it can be concluded that the Current Ratio (CR) has a significant effect on the Stock Price of a Retail Trading Company that has a positive relationship between the Current Ratio and the Stock Prices.
THE Utilization of Family Medicine Plant in Nias Islands, North Sumatra Province Adam Smith Bago
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.45

Abstract

Based on preliminary observations, it was found that the people in Nias Islands,North Sumatra province had used medicinal plants for a long time and had inheritedthem from generation to generation. So that many people still use medicinal plants.This study aims to determine the types of family medicinal plants used by thecommunity, how to mix or process family medicinal plants, and public perceptionsof family medicinal plants. This research is a type of qualitative research withdescriptive methods with 125 respondents. Collecting data by observation,interviews, documentation. The data analysis technique uses three stages, namelydata reduction, data presentation, and drawing conclusions or verification. Fromthe research results, there were 23 plant species used by the community in NiasIsland as Family Medicinal Plants. The method of concocting family medicinalplants varies greatly, depending on the type of plant and disease, the people ofSambulu village have good perceptions about family medicinal plants. Suggestionsare expected to maintain the habit of using medicinal plants, and also teach them tochildren or young people.
Forest Conversion in Upstream Oil and Gas Industry Area Meyzi Heriyanto; Bayu Andrianto Wirawan; Darwis, AN
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.46

Abstract

Forest conversion is the root of the problem that can hamper investment, state revenue, and potentially cause state losses. The purpose of this study was to analyze forest conversion in the upstream oil and gas industry area and the factors that influence forest conversion in the upstream oil and gas industry area based on spatial analysis. This study used systematic sampling with the point grid method measuring 1 kilometers * 1 kilometers. Rokan Block had 5,125 sampling points. This study used raster-based GIS analysis and logistic regression with the Wald Test. The results of the study showed that the Rokan Block Area experienced a fairly severe forest conversion in 2000-2014 influenced by the total population and The 1986 TGHK. The novelty of this study is that the active role of communities around the forests that still upholds the concern for the forest must be preserved, because they will be the front guard in securing forest encroachment, and upstream oil and gas industry are not the main economic activities that cause forest conversion
The Effect of Net Profit Margin, Return on Asset, Return on Equity on Share Prices in The Southeast Asian Metal Industry Sunaryo, Deni
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.47

Abstract

This study aims to see the effect of Net Profit Margin, Return On Assets and Return On Equity. This study uses secondary data. The sample used is nine metal companies that are on the Southeast Asian Stock Exchange. The independent variables in this study are Net Profit Margin, Return On Assets and Return On Equity. Sampling in this study using purposive sampling technique. The data analysis method used is the classical assumption test, hypothesis test, F test and t test. Based on the research results, it is known that Net Profit Margin, Return On Assets and Return On Equity do not have a significant effect on stock prices. The results of the F test indicate that Net Profit Margin, Return On Asset and Return On Equity together do not have a significant effect on stock prices. Recommendations for further research should be able to convince investors by increasing the value of Net Profit Margin (NPM), Return On Asset (ROA), Return On Equity (ROE). Because the higher the value of Net Profit Margin (NPM), Return On Asset (ROA), Return On Equity (ROE) and similar research is expected to increase the research sample or replace other variables related to stock prices and use a test tool other than multiple regression.
Efect of Ethanolic Leaf Extract of Sauraunia vulcani Korth on Lymphocyte and IL-In Immunized Rats Erlintan Sinaga; Syafruddin Ilyas; Panal Sitorus
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.48

Abstract

Ethanolic leaf extract of Saurauia vulcani Korthor pirdot in Indonesia was evaluated to improve the number of erythrocytes in laboratory rats after being immunized with sheep red blood cells (SRBC). This study was conducted in an experimental manner using a non-factorial Completely Randomized Design (CRD) with four treatments and six replications. The tested animals were 24 rats (Rattus norvegicus) maintained in the laboratory. The experimental designs were designated as follows: G0as a control group treatedwith regular animal feed,G1 was treatedwith 0.1 mLSRBC, G2was treated with 500 mg ethanolic leaf extract of Saurauia (EES)/kg body weight (BW), G3 was treated with 500 EES/kg BW and 0.1 mL SRBC. The immunological effect was monitored by analyzing the level of interleukin-2 (IL-2) using ELISA, lymphocytes using ABX Microx 60, and liver histopathology. The results showed that lymphocyte levels was increased in G2 and G3 but not significant to G0. The IL-2 level in G1 was recorded the highest among groups due to the treatment using SRBC. The percentage of necrotic cells in G1was 5.8%, followed by G3 with 2.3%. The morphologies of liver histology were normal, parenchymatous and hydropic degenerations, and necrosis. The phytochemical constituents in ethanolic leaf extract of S. vulcanipossessed an immunological effect through the increased lymphocytes, reduction of IL-2, and protection through normal liver histopathology in rats.
Design of a Switching Flyback Transformer as High Voltage and Frequency Power Supply for Raw Milk Cold Plasma Sterilization Fajar, Muhamad Ibnu; Elfahra Casanza Amalda; Muhammad Ali Akram Syah; Nurussa’adah
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.50

Abstract

Plasma is one of the four fundamentals states of matter other than solid, liquid and gas. In terms of temperature, plasma can be classified into Hot Plasma occurs in thermal equilibrium, Thermal Plasma occurs in non-thermal equilibrium, Cold Plasma occurs in non-thermal equilibrium Cold plasma is an ultra-fast method of sterilization that operates under ambient temperatures (ideal for thermolabile products) at a low running cost and is environment-friendly. Therefore, technology is needed to solve the problem through the innovation of a milk sterilization machine with the principle of non-thermal plasma sterilization by utilizing plasma technology to reduce microbial contamination. The output frequency and voltage are determined through software simulation using voltmeter, oscilloscope, and counter timer. After 220VAC supplies a voltage step down and rectifier circuit to produce a 12VDC output voltage to supply the Switching circuit voltage and the Flyback Transformer driver. Rated voltage and frequency reach 20kV 15kHz.The positive wire from the Flyback Transformer is connected to the acrylic box filled with water (positive electrode) and the ground wire is connected to another acrylic sheet (ground electrode. The milk medium to be sterilized can be placed on the positive electrode or between the ground and positive electrodes. Non-thermal plasma has an effective ability to decontaminate bacteria. This is because plasma is composed of a mixture of ionized particles, reactive radical molecules, and also ultraviolet Schematic circuit design has been successfully simulated. Acrylic sterilization media designs can be used to generate plasma. The mechanism of bacterial sterilization in milk is by the activity of inhibiting bacterial biofilms which can lead to bacterial DNA damage through reactive species in the non-thermal plasma used. Milk quality testing is carried out based on comparison of supporting literature with milk quality requirements according to SNI 3950: 2014.
Project Based Learning Model in Improving The Ability and Trust Desi Fitria; Mardhiyah Dwi Ilhami; Melly Susanti
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.51

Abstract

Abstract. This research is focused on providing experience to teachers specifically in developing teaching materials by using project based learning. The purpose of this study is to assist teachers in improving the effectiveness and creativity of students in developing student confidence. Research and development continued with quasi-experiment in collaboration with class-room teachers. Stages of research to be carried out, namely: (1) preparation, (2) develop-ment, (3) experimental phase, (4) evaluation. The subjects of this study were teachers and students from SMKN 01, SMKN 02, SMKN 03 in Bengkulu City. Furthermore, at the implementation stage a collaborative experiment was carried out where the implementation of learning collaborates with the teacher and was designed online. The results of this study with the learning of the project model can develop students’ confi-dence and can improve students’ self-creativity.
Halal Tourism, Cerfication Regulation, and Research Institute Insigh From IMT-GT Countries: A Review: A Review Aziza, Nurul; Prasnowo, M. Adhi; Khoirul Hidayat
International Journal of Science, Technology & Management Vol. 1 No. 3 (2020): September 2020
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v1i3.52

Abstract

The Indonesia-Malaysia-Thailand Growth Triangle) began as an initial effort of liberalization and economic integration in ASEAN. IMT-GT was officially endorsed in 1993, provides a sub-regional framework to accelerate cooperation and economic integration to develop the country's economy. With the increasingly vigorous issue of halal, then established the institution to oversee and provide assurance against halal products. This article explains halal tourism, regulation on halal certification as well as research institute about halal. There are by providing the differences between the three developing countries namely Indonesia, Malaysia and Thailand. Indonesia has regulation about concerning guarantee of halal products regulation UU number 33 year 2014. Malaysia has an advantage in terms of regulations and laws on halal certification, but not so with Indonesia as a country with a majority Muslim population. Indonesia has not made halal certification as a guarantee of food and beverage product safety. Indonesia also has a large and free halal market, clear rules, but in implementation it can be said to be weak. Whereas in Malaysia, halal research is quite strong and shows an increasing trend, public awareness about halal is also strong so that the process of certifying halal products goes synergistically. But in Thailand is still starting steps towards halal research. But on the other hand, producers in Thailand have a high awareness of the importance of producing halal products.

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