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International Journal Science and Technology (IJST)
Published by Asosiasi Dosen Muda Indonesia
ISSN : 28287223     EISSN : 28287045     DOI : https://doi.org/10.56127/ijst.v1i2
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
International Journal Science and Technology (IJST) is a scientific journal that presents original articles about research knowledge and information or the latest research and development applications in the field of technology. The scope of the IJST Journal covers the fields of Informatics, Mechanical Engineering, Electrical Engineering, Information Systems and Industrial Engineering. This journal is a means of publication and a place to share research and development work in the field of technology.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 10 Documents
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Search results for , issue "Vol. 3 No. 2 (2024): July: International Journal Science and Technology" : 10 Documents clear
ANALYSIS OF INVESTMENT IN THE DEVELOPMENT OF THE WATU ULO FISHERY PORT IN JEMBER DISTRICT REVIEWED FROM FINANCIAL ASPECTS AND SENSITIVITY ASPECTS Ratuinsani, Tati Mushalihati; Haris Muhammadun; Laksono Djoko Nugroho
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1254

Abstract

Watu Ulo Beach is a concentration of fishing communities as a place to fill supplies to catch fish at sea and as a landing place for fish catches. The local government intends to build a fishing port in Watu Ulo to improve facilities and infrastructure for fishermen in catching fish. This study aims to determine the feasibility of investment in the development of fishing ports in terms of financial aspects and sensitivity. The research method uses three scenarios for the value of income, namely the pessimistic scenario, moderate scenario, optimistic scenario. The results of the financial feasibility analysis using the NPV, IRR, BCR, and PP methods were declared feasible for the moderate scenario and optimistic scenario while the pessimistic scenario analysis results were not feasible because the IRR (6.15%) < MARR (7.72%) The results of the sensitivity analysis stated that with three scenarios on the Value of Revenue and Operating Costs obtained the results of Sensitivity The value of revenue for the pessimistic scenario is sensitive at -13.67% if it is smaller than that the investment becomes unfeasible. The revenue value for the moderate sensitive scenario is -39.96% if it is smaller than that the investment becomes unfeasible. The value of income for an optimistic scenario is sensitive at -40.75% if it is smaller than that, the investment becomes unfeasible. The revenue value for the optimistic scenario is sensitive at -40.75%, if it is smaller than that, the investment is not feasible. And if the Operating Cost Sensitivity for the pessimistic scenario is sensitive at -15.96%, if it is smaller than that, the investment is not feasible. Operating Costs for a moderate sensitive scenario at +22.67% if it is greater than that, the investment becomes unfeasible. Operating Costs for the optimistic scenario are sensitive at 25.59% if greater than that then the investment becomes unviable.
STRATEGIC OVERTIME IMPLEMENTATION: ASSESSING CRASH TIME, CRASH COST, AND COST SLOPE IN THE CONSTRUCTION OF KADIRI UNIVERSITY'S 4-STORY BUILDING Ali, Mahardi Kamalika Khusna; Tjendani, Hanie Teki; Witjaksana, Budi
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1309

Abstract

The lecture building is an important building which is the center of academic activities where educational activities are carried out. Currently, the construction of a four-story lecture building at Kadiri University is experiencing significant project delays with a deviation of 5.64% from the plan. Crash analysis can be carried out to speed up the duration of the project so that it can be completed on time with additional working hours. This research aims to determine crash time, crash costs, and cost slope for the application of overtime on the 4-story building construction project at Kadiri University. A quantitative and case study approach was used with data collected through observation, interviews, and analysis of project documents. Critical Path Method (CPM) analysis is carried out using Microsoft Project software to identify work that is on the critical path. Crashing is done by calculating crash time, crash cost, and cost slope. The research results show that applying 1 hour of overtime can speed up the project by 12 working days, with an additional cost of IDR 24,488,758. Cost slope analysis shows additional overtime costs of IDR 12,244,379. This research shows that the application of measurable overtime and crashing analysis can effectively overcome project delays in the context of building educational facilities.
EVALUATION OF TIME AND COST PERFORMANCE ON THE GX OFFICE & CO WORKING BALI PROJECT USING THE EARNED VALUE METHOD Rohim, Abd.; Witjaksana, Budi; Tjendani, Hanie Teki
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1337

Abstract

In rapid construction developments, delays still occur frequently and have not been resolved, as experienced by the GX Office & Co Working Bali project. The project will be completed in 42 weeks, but in the 27th week, there is an indication of a delay of -4.31% from the initial plan. Earned Value Method (EVM) is a time and cost performance assessment method that can be used to develop strategies to minimize delays. This research aims to evaluate the time and cost performance of the GX Office & Co Working Bali project using the EVM method. A quantitative approach is used to collect and analyze project schedules, actual costs, and progress reports. EVM key indicators such as Planned Value (PV), Earned Value (EV), and Actual Cost (AC) are analyzed to determine Schedule Variance (SV), Cost Variance (CV), Schedule Performance Index (SPI), and Cost Performance Index (CPI). The results showed that the project experienced delays, especially from week 1 to week 14 and week 19 to week 27, with SPI values mostly below 1. However, the project showed increased efficiency in cost management with values CPI above one after week 14 to week 27, indicating that the actual costs incurred are lower than the value of the work completed. These findings highlight the need for corrective actions and more effective management strategies to address delays efficiently in terms of costs.
SELF-HEALING MECHANISM BASED ON FAULT MANAGEMENT FOR SMART-GRID DEVELOPMENT ON 20kV SPINDLE NETWORKS TO IMPROVE DISTRIBUTION SYSTEM RELIABILITY AT PLN UID JAKARTA-INDONESIA Nurwahono, Lugito; Sudiarto, Budi
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1462

Abstract

This study aim is to study for the development of smart grid with the implementation of network automation in the spindle system to improve reliability, revenue and customer experience in the priority areas of PLN UID Jakarta. The addition of new substations has an impact on the reconfiguration changes and the addition of new networks in the context of loading feeders and causing the topology of the distribution network to be increasingly complex and impure spindle systems, in addition to the jammed condition of Jakarta also has an impact on the longer time in investigating disturbances, as well as the limited investment budget of PLN has not supported the installation of new keypoints in all distribution substations. This research was carried out by system modeling in the SCADA Distribution Management System for N-1 contingency and a simulation of the Self-Healing Mechanism test based on static and dynamic data parameters in real-time according to the Load Flow and Load Forecast in the SCADA systems. Evaluation of technical and financial feasibility as a smart feeder design that will be implemented in the spindle system, on the other hand, it is expected to be a Distribution Grid Management design that is feasible to be implemented in the 20kV Spindle system as an alternative to Zero Down Time to accelerate the recovery time of distribution disruptions and improve reliability performance in controlling the operation of the distribution system at PLN UID Jakarta.
PRODUCTION RESPONSE OF CUCUMBER (CUCUMIS SATIVUS L.) PLANTS DUE TO APPLICATION OF Sp-36 AND MANURE Kaho, Uly J Riwu; Raga, Henny A.; Sole, Robert A.; Naisanu, Joritha; Kisse, Darmanto F; Ndun, Astrid Aryani
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1465

Abstract

The cucumber plant (Cucumis sativus L.) is a vegetable plant that can be consumed in fresh or processed form. Cucumber production data from 2019-2022 continues to decline. One of the factors causing the decline in cucumber production is cultivation techniques that have not been carried out properly. To increase cucumber production, it is necessary to pay attention to the availability of nutrients. The fertilizer used is SP 36 fertilizer and organic fertilizer. The aim of the research is: To determine the interaction of SP36 fertilizer and manure on the growth and production of the best cucumber plants. The research was carried out in July - August 2023. The design used was a factorial Randomized Block Design (RAK). First factor: SP-36 fertilizer dose consisting of; P1: Control, P2: 150 kg ha-1 equivalent to 60 gpetak-1, P3: 250 kg ha-1 equivalent to 100 gpetak-1, Factor II: manure consisting of: N1: Control, N2: Cow manure 10 tonha-1 is equivalent to 4 kgpetak-1, N3: 10 tonha-1 chicken manure is equivalent to 4 kgpetak-1, Based on the results obtained: The interaction of SP-36 fertilizer and manure has a very real influence on the number of leaves, fruit length, plant height, fruit diameter and fruit weight Keywords: Production, Cucumis sativus L, SP-36, Cow manure
ANALYSIS OF COST AND TIME PERFORMANCE ON THE EAST SURABAYA HOSPITAL CONSTRUCTION PROJECT USING THE EARNED VALUE METHOD Almi, Harfandi; Hanie Teki Tjendani; Budi Witjaksana
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1482

Abstract

The construction of the East Surabaya Hospital is a multiyear project, starting from 2023 to 2024. The project has a contract value of Rp. This 494,603,098,000 is funded by the Regional Revenue and Expenditure Budget (APBD) of the Surabaya City Government. This research aims to analyze the cost and time performance of the project. The method used is the earned value method. The results of the cost and time performance analysis using the Earning Value method show that the cost performance and time performance of the East Surabaya Hospital Construction in the 22nd (twenty-second) week is considered not good. This result is shown by the Cost Variance value of Rp. - 608,118,565 and Schedule Variance value Rp. - 44,410,784,255. The Cost Performance Index value of 0.996 and the Schedule Performance Index value of 0.76 also shows that the cost and time performance of this project in the 22nd (twenty-second) week is not in good condition.
OPTIMIZATION OF AGRICULTURAL LAND USE THROUGH WATER SAVING AND ENVIRONMENTALLY FRIENDLY AGRICULTURE Namah, Chris N.; Abineno, Jemseng C.; Siviardus Marjaya; Haryati M. Sengadji; Melgiana S. Medah; Dina V. Sinlae
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1524

Abstract

Integrated agriculture is a combination of two activities, namely the agricultural Integrated agriculture is a combination of two activities, namely the agricultural sector and the livestock sector and is sometimes also known as the Livestock and Crop Integration System. By mastering technology, farmers can manage their resources more effectively, reduce dependence on outside parties, and create added value from their agricultural products. agriculture, but also as a driving force for a sustainable local economy. The aim of the research is to describe the use of agricultural technology through the application of water-saving and environmentally friendly agricultural technology and to realize community economic independence and preserve natural resources (soil nutrients). The research was carried out at the Tnao Mat Farmers Group Garden, III Bieto Hamlet, Niuk Baun Village, West Amaraasi District, Kupang Regency. The data collection methods used were observation, interviews and documentation. Next, experiments were carried out to produce Organic Fertilizer (Bokashi, POC and Drip Irrigation). The results obtained are that the environmentally friendly agricultural model has strengths greater than its weaknesses, as well as its opportunities greater than its threats. So farmers can be directed to dare to try environmentally friendly agricultural models to reduce production costs and increase quality agricultural products. Keywords: Production, Cucumis sativus L, SP-36, Cow manure
COST ANALYSIS WITH CRASH PROGRAM OF KEROBOKAN PARKING LOT BUILDING BALI Dwi Cahyani Putri; Budi Witjaksana; Hanie Teki Tjendani
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1571

Abstract

Kerobokan Bali Parking Building is one of the buildings that uses steel material as the main structure. The building which has a height of 13.97 meters, a width of 32.8 meters, and a length of 16.18 meters has a construction plan duration of 248 calendar days starting from July 2023. Known critical trajectory activities will be carried out a crashing program analysis with the aim of accelerating time by using one method, namely overtime work with a duration of 4 hours. Based on the analysis that has been carried out with the help of the Microsoft Project 2019 application, there are 16 lists of activities included in the critical trajectory. In writing this thesis, it will be mentioned in the form of a line code in Microsoft Project 2019, namely 569-573-579-580-581-606-585-586-590-591-595-596-600-601-602-612. In addition to knowing the list of critical path activities, this thesis also accelerates the duration with an additional 4 hours of overtime and calculates the total cost of the acceleration. After acceleration, it is known that the duration decrease is 61 days with a normal duration of 248 days to 187 days and shows a time efficiency of 0.245%. The total initial cost with normal duration is Rp 8,822,280,000.00 while if the project is accelerated, the project cost becomes Rp 8,901,216,104.5 by showing an additional cost of Rp 78,936,104.47.
COMPARATIVE STUDY OF MULTI CRITERIA DECISION MAKING METHODS IN A CASE STUDY OF THE BEST EMPLOYEE DECISION SUPPORT SYSTEMS Istini, Syalis Ibnih Melati; Ahmad Apandi; Rama Dian Syah
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1581

Abstract

Selecting the best employees is an alternative for companies to maintain and improve the quality of employee work. Being best employee is a matter of pride for every employee, so this good thing will also have an impact on the company. Having employees with good quality will certainly improve the quality of the company itself. Making decisions for the best employees is a challenge for companies because its subjective nature makes the selection inaccurate, so an objective decision-making system is needed according to the criteria. The purpose of this study is to compare three multi-criteria decision-making methods (MCDM) namely AHP (Analysis Hierarchy Process), SAW (Simple Additive Weighting Model) and TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution). Based on comparative studies from several journals, the results of the accuracy levels obtained from different methods show that there are different results from several cases discussed in reference journals, this is due to differences in the number of criteria and alternatives used for analysis.
APPLICATION OF ARTIFICIAL INTELLIGENCE (AI) IN AGRICULTURE BY IMPLEMENTING INTERNET OF THINGS (IOT) TECHNOLOGY AND UNMANNED AERIAL VEHICLE (UAV) Ariyani, Rizki
International Journal Science and Technology Vol. 3 No. 2 (2024): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v3i2.1603

Abstract

Smart farming is developing quite well, using Unmanned Aerial Vehicle (UAV) technology and the Internet of Things (IoT). UAVs are estimated to have ease of use, affordability so that farmers can use them. Most UAVs are controlled by remote controllers using radio waves, wireless, and bluetooth. The technology could transform traditional agricultural activities into modern activities, such as using drones for the agricultural sector. The application of this technology is done to improve the efficiency of products and the implementation of agricultural activities. Unmanned Aerial Vehicle is realized by applying artificial intelligence and human skills to precision farming.

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