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bernadeta subandini astuti
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JURNAL TEKNOLOGI TECHNOSCIENTIA
Published by Institut Teknologi Nasional Yogyakarta
ISSN : 19798415     EISSN : 27148025     DOI : https://doi.org/10.34151/technoscientia.v8i2.161
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
JURNAL TEKNOLOGI TECHNOSCIENTIA dengan ISSN: 1979-8415 dan E-ISSN: 2714-8025 merupakan jurnal ilmiah yang diterbitkan LPPM Institut Sains & Teknologi AKPRIND Yogyakarta sebagai wahana publikasi karya ilmiah/penelitian di bidang teknologi atau rekayasa meliputi bidang teknik kimia, teknik industri, teknik mesin, teknik elektro, teknik informatika, teknik geologi, dan teknik lingkungan, terbit dua kali setahun pada setiap bulan Februari dan Agustus. Setiap naskah yang dikirim akan dilakukan review secara tertutup. Hasil review naskah meliputi: DITOLAK atau DITERIMA DENGAN PERBAIKAN atau DITERIMA. Setiap naskah yang dinyatakan DIITERIMA dan DITERBITKAN dikenakan biaya proses dan cetak sebesar Rp. 250.000,- (di luar biaya pengiriman) dikirimkan via transfer ke: Bank Mandiri Cabang Yogyakarta No.: 137-00-1255210-1 an.: Prof. Dr. Ir. Sudarsono, M.T.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 16 Documents
 1   2 
Search results for , issue "Technoscientia Vol 4 No 1 Agustus 2011" : 16 Documents clear
KETERDAPATAN DAN TIPE MINERAL PADA BATUBARA SERTA METODE ANALISISNYA Edy Nursanto; Arifudin Idrus; Donatus Hendra Amijaya; Subagyo Pramumijoyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.124

Abstract

Coal is sediment composed by organic and inorganic materials with organic contents that more than 50%.The organic matters are derived from the remaining plants and have been decomposition and changes in physical and chemical properties. Based on their abundance, then the minerals in coal can be divided into primary minerals (major minerals), extra minerals minor minerals) and trace minerals. Consist of the major minerals are clay minerals and quartz while the minor minerals are carbonates, sulfides and sulfates. Analysis that used for mineral in coal is Microscopic optical, Scanning Electron Microscopic (SEM), Electron Probe Micro Analyzer (EPMA), and x-ray Diffraction (XRD).
STUDY PEMODELAN IMPAK PADA PANEL BAHAN KOMPOSIT DENGAN METODE ELEMEN HINGGA Saputra, Hadi; Rochardjo, Heru Santoso Budi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.474

Abstract

Generally manufacturing of composite materials is performed using trial and error method.The finite element method show the capability to optimize that process.The efficient formulation for simulating high speed impact usually uses explicit dynamic method. The purpose of this research is modelling impact loading on composite panel using finite element method as a part of preprototyping impact resistant composite material.The process of impact simulation on composite panel using explicit dynamic formulation can be done using commercial application software, that done with variation on impactor velocity (200, 400, 600, 800, 900, and 1000m/s), impactor geometry likes cone and blunt, Elasticity modully of lamina composite materials, the direction of fiber as symmetric cross plies and symmetric angle plies, and the thickness, 4, 6, 10 plies.The result showed that impact simulation on composite panel using this software can be performed well, the influence of impactor velocity shows increased the Von Misses Stress with average value 2.41% (in 200-400m/s), 1.59% (in 400-600m/s), 1.28% (in 600-800 m/s), 1.20% (in 800-1000m/s). Cone A type with the smallest area of contact have the best capability to penetrated compared with B type and blunt type. Symmetric angle plies have better impact resistant compared with symmetric cross plies.
PEMANFAATAN ECENG GONDOK UNTUK MEMBERSIHKAN KUALITAS AIR SUNGAI SUNGAI GADJAHWONG YOGYAKARTA Setyanto, Kris; -, Warniningsih
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.477

Abstract

River is one source of water is important sanga ang existence, in urban areas are often neglected maintenance stream. Many found the river full of garbage, not flowing and odorless. Gadjahwong River is one of the river in Jogjakarta through the city of Jogjakarta, there right dikiri industrial areas such as SGM milk factory, leather factory, etc. Budi Makmur. These rivers across the eastern part of the city of Jogjakarta, the secondary data and previous studies the parameters of BOD, COD, TSS and high Poop coli can be used as raw drinking water, can only be used for irrigation and agriculture. The method used in this study is first to determine the area of the river, installing nets to grow sisal plant, water hyacinth breeding. kmeudian test characteristics of river water before treatment. The next test stream water purification with water hyacinth after sam-pling continued with before, in the group after group of plants and water hyacinth plants, carried out per 2 weeks for 2 months. Based on the data for all parameters studied pollutants were water-quality parameters for turbidity, color, COD, BOD, Fe and ammonia from time to time is always changing levels. There is a tendency to decrease pollutant parameters hyacinth clumps position that more and more.
PENGUKURAN NILAI VISKOSITAS OLI MESRAN SAE 10–SAE50 UNTUK PENDINGIN TRANSFORMATOR DISTRIBUSI DENGAN PENAMPIL LCD -, Mujiman
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.478

Abstract

Lubrications 0il is the main support of the working of a machine. Not only that, even this oil also determine the performance and engine durability. The better quality oil is used, the better the performance and engine durability. Function not only as a lubricating oil, but also as a cooling and cleaning machinery. As a lubricant, lubricating oil (lubricating) all moving parts inside the machine to prevent direct contact among components which made of metal. In this case, the element, thickness (viscosity) isveryimportant.As coolant, oil must also be able to reduce the heat generated by friction antarlogam on a machine that moves, such as valve (valve) or bearing (ball bearing).
PEMANFAATAN LIMBAH SERAT INDUSTRI TEPUNG SAGU AREN SEBAGAI BAHAN BAKU PEMBUATAN KERTAS (PULP) DENGAN PROSES DELIGNIFIKASI -, Purnawan
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.479

Abstract

There are several home industries in sago aren processes center in Daleman, Tulung, Klaten, Central Java, produce sago aren flour product (soun) an average of 200 tons/year, these home industries produce waste by product of sago fibre. The process of pulp from sago fibre is done by two steps of the process, step one is with using nitric acid (HNO3) and second process with soda coustic (NaOH). The process is conducted in three neck flask equipped with a stirrer, and cooller. The temperature is kept constant. Delignification process of sago aren fibre was carried and by two steps. Firstly 10 grams of sago fiber adds by 400 ml of HNO3 7.5%. Secondly the product of step one adds by 400 mL of NaOH 7.5%, while the condition of both steps one kept on temperature of ±103 0C, and the stirring speed of 400 rpm, obtained relatively good condition by using NaOH concentrations of 7.5% and 1.5 hours of processing time. In these conditions the percentage of product cellulose results obtained is 33.41%, with the permanganate numbers of 1.28, the concentration of α cellulose 95.74%.
PENGATURAN SISTEM SHIFT KERJA UNTUK MENINGKATKAN PERFORMANCE SERTA MENGURANGI KELUHAN KARYAWAN Fajarwati, Ferisia Dwi; Hidayat, Rachmad; Agustina, Fitri
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.481

Abstract

Reduce fatigue and saturation levels of employees in a company's performance will affect the results and how they work in completing a job. Shift work system settings are useful for the company because with the shift work system will be able to improve performance and reduce employee complaints. Analyses were performed by the method of Analytical Hierarchy Process (AHP). Weighting the results indicate that the type of complaints for the morning shift caused by physical factors of 62 299%, with sub-criteria of 58 277% fatigue. On the night shift, the most influential type of complaint is the physical factor of 50 616%, with sub-criteria of fatigue by 59.1%. Setting a new work shift in the recommended improvements that include changes in rotation length. Arrangements made ​​by rotating shifts some employees who are divided into groups or group. Setting a new work shift system increases job performance of employees and reduce the level of employee complaints. Turnover shift work increases the sense of responsibility and work together as a team work. Shift work rotation to reduce employee complaints of fatigue in nature because the conditions of a monotonous work environment.
PEMANTAU KESTABILAN TEGANGAN PADA JARINGAN LISTRIK 3-FASE BERBASIS PC DATALOGGER Hani, Slamet
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.484

Abstract

This research, is studied about a system of PC Datalogger capable to measure, record, present the graph of usher the phase and phase voltage with neutrally on 3-phase electric network in accurate figure, informative and realtime. The watcher of stability process abaut 3-phase electrics network in electronic can do to use transduser with three single phase transformator in way configuration, by using RS232 interface for data communications of PC and measure module. System examination to ability of application program 3-phase datalogger.exe run by PC as regulator process the datalogger voltage 3-phase watched. In this examination, result of voltage monitoring will be presented in separate linearity graph for the tension of test the R-N, S-N, T-N, RS, ST And TR com-paring with the time depth perception.
PENERAPAN METODE QUALITY FUNCTION DEPLOYMENT (QFD) SEBAGAI UPAYA UNTUK PENINGKATAN KUALITAS PELAYANAN Indriani, Sri; Sari, Sanny Andjar
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.487

Abstract

Quality of service is a very important factor in an entertainment business. This cases on research of MGM City Club is an entertainment business to the concept of One Stop Entertainment. Includes art galleries, Pub, Lounge, and karaoke.This study aims to analyze the quality of customer services and factors-other factors that can enhance pro-gress for the company. Fulfilling customer expectations and customer satisfaction will bring benefits to the company. To meet consumer expectations, it is necessary to perform design services with quality improvement QFD. The use of these methods can help com-panies focus on improvements that should be made to meet these consumer expecta-tions.Based on this analysis it is known that the highest attribute value of interest rate is "Keamanan saat berada di pub" with a value of 4.73, and the lowest is ”Adanya kemuda-han dalam penyampaian komplain” with the value 4.30. The value of the highest satis-faction level was “Sound yang memadai” with a value of 3.83 and the lowest is “Jumlah meja dan kursi yang memadai” with a value of 2.54. While the priority for attention by the pub was “Melakukan briefing setiap hari” with a value of 1.397.
AKTIVITAS VULKANISME EKSPLOSIF PENGHASIL FORMASI SEMILIR BAGIAN BAWAH DI DAERAH JETIS IMOGIRI Mulyaningsih, Sri; Husadani, Y T; Umboro, P A; Sanjoto, Siwi; Purnamawati, Dwi Indah
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.489

Abstract

The widely exposed of volcanic rocks within western part of Central Java-DIY Southern Mountain areas, indicates that volcanic activities had influenced geology of this area. Volcanic-stratigraphic study finds pumiceus rocks, tuff and co-ignimbrite breccias that can be described as primery volcanic rocks at study areas. Those volcanic rocks were erupted explosively followed by collapsing strato cone and forming new caldera. The associate of volcanic rocks with co-ignimbrite breccias, indicates that the central eruption was not far from the outcropes. Shallow intrusive rocks of andecites bearing hornblendes that exposed at the highest cone shape geomorphology of Gunung Gede, south to southwest Sudimoro, might be as the central eruptions.
SISTEM KENDALI PEMICUK LEDAK DENGAN DETONATOR LISTRIK MENGGUNAKAN TELEPON GENGGAM BERDASARKAN SMS (SHORT MESSAGE SERVICE) -, Subandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.490

Abstract

The use of explosives/bomb was always considered bad and frighten for society because of the recent terrorist act. In fact, not only in the military field, Bomb can be used for construction (reconstruction), mining exploration, dramatization movie scene or something else, but can not be denied its high risk. Be clear about the bomb technology is not widely explored whether the explosives themselves, trigger/detonator, especially control systems.Control using a Mobile based on SMS has been used widely, considering the advantages of this control that it is low cost, wide coverage, and do not need to design the transmitter and receiver. The message sent is the format of PDU (Protocol Data Unit), but is converted to text for easy monitoring, a microcontroller with at-command (command function for HP) will read and recognize those formats to start the next action according to the instructions sent via message. By Sending an SMS (boom) to the mobile server, then messages are forwarded to the microcontroller. The results show that the system works well if the character that is sent in complaince then the microcontroller will execute the program to activate the electric detonators, the ecplosive will be ignited and successfully detonated.

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