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INDONESIA
GEMA TEKNOLOGI
Published by Universitas Diponegoro
ISSN : 08520232     EISSN : 2656582X     DOI : -
Core Subject : Science,
Gema Teknologi Journal (pISSN : 0852-0232, eISSN : 2656-582X) is an open access journal published by Vocational School, Diponegoro University, Indonesia. Gema Teknologi publishes articles from various engineering disciplines (the results of original scientific research or new scientific studies of literature). Editor receives articles both in English and Indonesian. Gema Teknologi Journal is published 2 (two) times a year, on April and October.
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Articles 8 Documents
Search results for , issue " Vol 19, No 4 (2018): October 2017 - April 2018" : 8 Documents clear
APLIKASI METODA CRITICAL PATH METHOD (CPM) DALAM PENJADWALAN KEGIATAN PEMBANGUNAN PERUMAHAN Sutanto, Sutanto
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.72 KB) | DOI: 10.14710/gt.v19i4.19149

Abstract

The development of housing development in Indonesia is now showing a very rapid progress in line with the rate of population growth and the increase in income per capita community, so that housing demand is getting bigger. For that much needed planning and scheduling activities of a good housing development projects in accordance with the progress of science and technology in order to have added value to the implementation of the housing development. The Critical Path Method (CPM) application research in guarding housing development activities and the impact on technical constraints in the field is one solution. Based on the results of data processing shows that the use of scheduling activities of housing development projects with Critical Path Method method has resulted in more added value.
KOREKTOR FAKTOR DAYA OTOMATIS PADA INSTALASI LISTRIK RUMAH TANGGA Yuniarto, Yuniarto; Ariyanto, Eko
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (650.971 KB) | DOI: 10.14710/gt.v19i4.19153

Abstract

TL lamps, electric motors, Air Conditioner (AC), and other electrical equipment which is widely used for industry and households. Where all the electrical equipment is a burden that is inductive. As a result of the use of an inductive load, causing the falling value of the electrical power factor mounted on the customer can not be used optimally. To overcome this, in this thesis, has created a tool to correct the power factor value automatically. To improve the power factor, is used capacitors mounted in parallel to the load. By using the integrator, it can be obtained how large capacitor must be mounted parallel to the load according to the inductive load changes resulting in improved power factor value. Test results showed that an increase in the value of power factor from 0.34 to 0.95.
RANCANG BANGUN SISTEM ADMINISTRASI KERJA PRAKTEK DAN TUGAS AKHIR BERBASIS WEB MENGGUNAKAN FRAMEWORK CODEIGNITER Subari, Arkhan; Tadeus, Dista Yoel; Winarno, Heru; Yuwono, Teguh
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.937 KB) | DOI: 10.14710/gt.v19i4.19147

Abstract

Information system is a set of components that interconnect, collect, process, store, and distribute information to support decision making and supervision within an organization. Today the information system can not be separated with computer technology that feels growing rapidly along with our increasingly complex needs. These developments can be seen from the many organizations or institutions in various fields that use computerized systems to perform various jobs quickly and with great accuracy. The use of computerized systems is expected to minimize errors made by humans thereby reducing large losses. And can mengefisienkan time in completing the work quickly and accurately. One concept of building a computerized information system is dengfan MVC model. Model-View-Controller (MVC) is a concept introduced by the inventor of Smalltalk (Trygve Reenskaug) to encapsulate data along with processing (model), isolate from the process of manipulation (controller) and view to be represented on a user interface . The MVC architecture has the benefit of separating between model and view allowing multiple views using the same model. As a result, an application model component is easier to implement, test, and maintain, because all access to the model runs through this component. One of the frameworks that works based on the MVC concept is Codeigniter. Codeigniter is an open source web application framework that is used to build dynamic php applications. The main purpose of Codeigniter development is to help developers to work on applications faster than writing all the code from scratch. Because of the superiority of codeigniter that the system of practical work administration and the final task is built using the framework..
ANALISA PERHITUNGAN BALLAST PADA PELUNCURAN MENYAMPING (SIDE LAUNCHING) KAPAL SUNGAI 200GT DI PT. DKB (PERSERO) CABANG SEMARANG Ariany, Zulfaidah
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (655.29 KB) | DOI: 10.14710/gt.v19i4.19152

Abstract

Considering the risk faced in the side launching, limited land from the shipyard so that required calculation and analysis in the implementation of the launching. The purpose of this research is analyzes and counting ballast (a counterweight ) used in a river boat lct 200 GT on the launching of sideways ( side launching ) so that safe and floats can be perfect in water, as nown that the launching of is one of the stages important in the development process the new vessel which have prepared to be operated, formerly preceded by stage first cutting plate ( cutting first steel plate ) and the keel laying ( laying ) keel of a ship. Before the handover of a vessel is carried, a ship will had some sea trial. The results of this research is scientific publication in national journal , as a input for the shipyard to implement the launch sideways safe as well as the basis for students and teachers included in matter basic lecture subjects of case in point in lecture the theory ship building.
PROTOTYPE GROUNDING DETECTOR PADA GROUND CLUSTER DENGAN SISTEM INTERLOCKPADALBS (LOAD BREAK SWITCH) BERBASIS ARDUINO MEGA 2560 DENGAN TAMPILAN HMI (HUMAN MACHINE INTERFACE) Pasaribu, Bambang Handoko; Setiono, Iman
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.994 KB) | DOI: 10.14710/gt.v19i4.19151

Abstract

Electricity has become a daily necessity in the community both social, economic and business. Therefore electricity is needed every day and it is the reliability of PLN. To fulfill such reliability While the reliability of electrical energy should be followed by inspection on the equipment used. PLN field employees themselves who every day always do inspection on the network of all the repeaters, so that field officers always know the state of the network in the field. If the network looks bad or requires maintenance it will be scheduled to do the job. Before the holding of the work it will be done in the first outage area is to operate the switching tool didaerah area. The switching tools are ABSW and LBS. After all the swithing tools are operated the workers always do the grounding first on the three phases by using ground clusters at the starting point to the end of the work where if transmitted so called PMS ground. This is done as a safety because the LBS switching tool is closed so that workers are not sure if the network has been extinguished and as a safety if LBS failed to work or failure. But here the worker himself sometimes still not sure whether the ground cluster is already installed properly or not. And as a safeguard against the occurrence of any maneuvering done by employees from the office Rayon. Therefore the author wants to make a prototype to detect whether grounding is installed properly or not in every phase. The prototype uses Arduino mega as its micron and uses a voltage sensor to find out the value of the voltage. If the ground claster is installed and work fails on LBS then the OCR relay will work and PMT will trip. With the prototype is expected to improve security in the work and minimize the occurrence of work accidents. This prototype has a 0% chance of a crash if the ground cluster is properly installed. 
PEMBUATAN CREAM DETERGENT UNTUK MENINGKATKAN KETRAMPILAN IBU-IBU PKK Kusumayanti, Heny; Budiyono, Budiyono; Dwimawanti, Ida Hayu; Yesiana, Reny; Purwanto, Agus; Subari, Arkhan
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.466 KB) | DOI: 10.14710/gt.v19i4.19170

Abstract

Cream detergent is often used in everyday life, serves to wash and clean the dirt (fat). In order to commemorate the day of kartini in 2018, held a training on making cream detergent in Kp. Krapyak RT 07 RW 11 Bintoro Demak. The pH cream detergent generated from this training is 11, this is in accordance with SNI 0062: 2016, where the pH max cream detergent is 11. The purpose of this devotion provides the transfer of science and technology appropriately to the mother of PKK and also to provide skills and entrepreneurship to PKK mothers.
REALISASI PENGENDALI ON-OFF HISTERISIS DENGAN OPERATIONAL AMPLIFIER (OP-AMP) Tadeus, Dista Yoel; Subari, Arkhan; Manan, Saiful
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (574.573 KB) | DOI: 10.14710/gt.v19i4.19150

Abstract

The realization of the On-Off control system can be built using the comparator principle. The principle has a weakness that is the possibility of chattering due to 'thin' limit of comparator switching. Low immunity to noise increases chances of chattering, if not anticipated it will cause 'fatigue' on actuator thus reducing component’s lifetime. Hysteresis has features to suppress chattering. This article describes how to realize the hysteresis On-Off controller using Operational Amplifier (Op-Amp) which is simple and cheap discrete electronics component, by modifying the Op-Amp comparator circuit so that it has the hysteresis band with minimum and maximum limit variable so that the reference point of the comparator can be shifted.
EKSISTENSI PLTMH CINTA MEKAR DALAM PEMBERDAYAAN MASYARAKAT MELALUI KOPERASI MEKAR SARI DI DESA CINTA MEKAR KECAMATAN SERANG PANJANG KABUPATEN SUBANG PROVINSI JAWA BARAT Ariyanto, Eko; Setiono, Iman; Sasmoko, Priyo; Pamungkas, Zaka Adi
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.928 KB) | DOI: 10.14710/gt.v19i4.19154

Abstract

PLTMH located in CintaMekar Village, SerangPanjang Sub-District, Subang Province, West Java Province, utilizes Ciasem River water, processed so that it has high water fall 17,61 m, water discharge design 1,100 l / s, hydraulic potential of 160 KW, turbine efficiency of 0.73, efficiency of generator 0.89, out put generator 120 KW, loses 4 KW and total electrical energy generated 116 KW. The purpose of development, to help people who were not reached PLN electricity, to empower the community.Empowerment begun from the time of development, where citizens are involved, which then able to become operators. The result of energy from PLTMH is sold to PLN, then the result is reduced for operational costing, maintenance cost, import cost / electricity payment used, depreciation cost of equipment taken from 10% of transactions, divided by two (50% for PT HidropirantiIntiBaktiSadaya, as shareholder) and 50% for Mekar Sari Cooperative, used for community empowerment. Since its operation, people who do not have electricity grid, are connected to electricity. In addition, the proceeds from the sale of electricity to PLN are used to help with the cost of education / scholarship, health, loans for business and cooperative operations. Empowerment implemented or managed Mekar Sari Cooperative. Along with the development of the era, empowerment assistance now being implemented includes: Health Sector in cooperation with Village Midwife, Savings and Loans and Scholarships for Primary School - 10 People and Junior High School - 5 People.

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