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TEKNIK

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Published by Universitas Diponegoro

ISSN : 08521697 EISSN : 24609919 DOI : -

Core Subject : Engineering,

Engineering

Journal yang mempublikasikan artikel-artikel ilmiah dari berbagai disiplin ilmu rekayasa/keteknikan. Artikel-artikel yang dipublikasikan di Jurnal TEKNIK meliputi hasil-hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), atau komentar atau kritik terhadap tulisan ilmiah yang dipublikasikan oleh Jurnal TEKNIK.

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Articles 15 Documents

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Search results for , issue "Volume 28, Nomor 2, Tahun 2007" : 15 Documents clear

MENGANALISA UNJUK KERJA PENGERINGAN IKAN TERI DENGAN SISTEM SIRKULASI UDARA PAKSA Darmanto, Seno; Setyoko, Bambang
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Experiment is done to know the performance of â€œteri/stolephorusâ€ fish drying with forced air flow system. Theperformance of fish drying is based on moisture of fish, fan/fan velocity, operation temperature and time. Theresearch is done at laboratory by using drying machine with forced air flow system. Based on data analysis itshows that the moisture of fish achieves 20% on fan velocity maximum 2,8 m/s and times operation 3 hours

INVERTER MULTI LEVEL TIPE JEMBATAN SATU FASA TIGA TINGKAT DENGAN MIKROKONTROLER AT89S51 A. Warsito, A. Warsito; M. Facta, M. Facta; Aptono. T.Y, Aptono. T.Y
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Inverter is a power electronics circuit which is used to convert DC voltage and current to AC voltage andcurrent. In conventional inverter, most commonly used, only has three level voltage, those are +Vdc, -Vdc,and zero. Meanwhile both square inverters and SWPM inverter has big harmonic distortion. In SPWMinverter scheme, high frequency switching must be used to minimize total harmonic distortion (THD). Multilevel inverter is a type of inverter that has more than one level of voltage and current output.The major advantages of multi level inverters are a good voltage waveform, small harmonic dirtortion,switching component operated under low frequency, and it can supply a big power.This paper will discuse the construction of single phase three level multi level inverters, hardware testinginclude output waveform THD, and the comparisson of multilevel inverter with other conventional invertersscheme suc as PWM inverters modulation, and square waveform inverter. Atmelâ€™s AT89S51 microcontrollerused to control switching scheme in this multi level inverter. By this power electronic circuit, it is expected alow cost and reliable multi level inverters prototipe.

KEPUASAN MAHASISWA TERHADAP â€œSERVICE QUALITYâ€ DI FAKULTAS TEKNIK UNIVERSITAS DIPONEGORO MENGGUNAKAN METODE â€œSTUDENT SATISFACTION INVENTORYâ€ Fanani R, Zainal; Santoso, Haryo; Lusiana, Ina
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

College is a service industry providing service activities of higher education, where quality of service andproduct have must be committed to customer satisfaction orientation. Diponegoro University as one of TheState University which is located in Semarang Central Java become research object at this research about thequality of service education.This research uses Student Satisfaction Inventory method which was developed by Noel Levitz. This methodmeasure service quality based on eleven dimension, there are Academic Advising, Campus Climate, CampusLife, Campus Support Services, Concern for the Individual, Instructional Effectiveness, Recruitment andFinancial Aid Effectiveness, Registration Effectiveness, Campus Safety and Security, Service Excellence, andStudent Centeredness.The research was done by survey of student satisfaction. The sample are student of Technical Faculty UNDIPwhich is taken proportionally from 8 study program of Engineering Faculty in UNDIP. There are two differentscore for each item on the survey, the importance score, and the satisfaction score. The assessment of qualityservice education based on the difference in the importance score and satisfaction score, so called withperformance gap score.The result shows that the highest importance score is campus supports service (4.65), the highest satisfactionscore is campus climate (3.29) and the highest performance gap is campus support services (1.61). Value oftotal mean performance gap is 1.44. According to the guidelines provided by Noel Levitz, a performance gapbetween zero and 1.50 indicates that the institution (UNDIP) is almost meeting students expectation. From theperspective of engineering students, Electrical Engineering student feel most satisfied to service educationgiven by UNDIP than student from other engineering majors. The other result of this research indicates thatthere are 14 variables from 66 variables has high priority to be improved.

OPTIMASI PENGUMPULAN DAN PENGANGKUTAN SAMPAH KOTA DENGAN MENGGUNAKAN MODEL POWERSIM M. Arief Budihardjo; Badrus Zaman
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Gathering and transportation of garbage represent problems in Town Semarang with 1.431.105 population. Neededan effort of effective garbage management breakthrough in order to improving efficiency and optimalisationgathering and transportation of garbage by using Powersim dynamic model. Powersim is windows base software tocreate the model of dynamic system with a simulator desain. Simulation of gathering and transportation garbagemodel in Town Semarang of early compilation concept. Compilation concept conducted by determining elementwhich playing a part in gathering and transportation process of garbage which interact and have depending.Concept formed to be formulated by as model which is the in form of the breakdown of, picture or formula. Here inafter simulation conducted with the model which have been made by including data to know behavior process of thegarbage gathering and transportation. Data input for the gathering to cover the garbage volume, appliancetransport the garbage and to the transportation of its data input cover the garbage volume in place Dismissal ofWhereas and appliance garbage transport. Result of research shown existing condition of garbage gathering andtransportation in Town Semarang not yet optimal, seen by garbage amount which not yet been transported byduring gathering process. After optimation proven by that any garbage transported at process of gathering andtransportation and also do not rest of garbage which piled up. For repair of gathering and transportationrecommended by gathering process (1) used a garbage pedicab amount to 1300 with 0,82 m2 capacity, 2 timesritation and operate everyday and ( 2) 15 dump truck, with 6 m3 capacity, 1 times rotation and operate everyday. Itstransportation repair used by arm roll truck as much 60 by 6 times ritation and have 6 m 3 capacities operatingeveryday

LIFE CYCLE ASSESSMENT OF PAPER TOWEL AND ELECTRIC DRYER AS HAND DRYING METHOD IN THE UNIVERSITY OF MELBOURNE Hapsari Budisulistiorini, Sri
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Nowadays products, services, or technologies are proactively evaluated toward environmental performance byusing the life cycle assessment (LCA). The assessment cover the whole life cycle from cradle to grave hence theproduct performance can be analyzed or compared with others for product development or for making adecision. The University of Melbourne currently installed towel dispenser by means of hand drying method inthe entire campus. As some has suggested that electric dryer will provide more sustainable service than papertowel, a LCA study will be a good approach for comparing both methods. The study utilizes SimaPro softwareto generated database for impact assessment. The assessment method used in this study is Eco-Indicator 99.From the LCA study, electric hand dryer performed better in most of indicators. Electric hand dryer istherefore recommended to be used in the entire campus of the University of Melbourne

DISTRIBUSI TEGANGAN PADA PERCABANGAN PIPA 90O AKIBAT TEKANAN INTERNAL MENGGUNAKAN MEH Suprihanto, Agus; Satrijo, Djoeli; Basuki Wibowo, Dwi
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Piping system is very important in many industries. Ones of crucial in design of piping system are todetermine the stress distribution around the branch. In this research, the distributed stress over 90o branchpiping system was evaluated with finite element method. Five models piping 90o branch which differentratio of diameter of pipe have been developed. The load applied on the models is internal pressure.The results indicate that around the branch there is stress distribution. The maximum stress is located atcenter of the branch but decrease significantly in the distance 30mm-45mm from it. Beyond the distance75mm from center, for diameter ratio 1, the model gives good agreement with experiment data

PENUKAR KALOR CANGKANG DAN TABUNG EFEKTIF UNTUK MENDINGINKAN MINYAK PELUMAS MESIN DIESEL DENGAN PENYARINGAN SISTEM CABANG Murni, Murni
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Lubrication is important parameter in whole operation in diesel engine, bad lubrication will affect trouble inoperation lubrication have double function decrease friction and cooling. So lubrication has to be treatmentto increase quality by cooling method. Cooling method is done with bat exchanger of shell and tube type. .

PENGOMPOSAN LIMBAH TEH HITAM DENGAN PENAMBAHAN KOTORAN KAMBING PADA VARIASI YANG BERBEDA DENGAN MENGGUNAKAN STARTER EM4 (EFECTIVE MICROORGANISM-4) Syafrudin Syafrudin; Badrus Zaman
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Black tea waste composting needs dryer material to absorb moisture of waste which is to be left. Dryermaterial used is goat manure. To make faster composting proccess and decrease rot smell potency which isout from heap, so used Effective Microorganism 4 (EM4). This research have direction to know characteristicof mature compost, the optimal comparison of mixing composition black tea waste and goat manure withEM4 addition, and cost needed to make compost. Variations taken are control variation (black tea waste), Avariation (black tea waste + 30 ml EM4), and B variation (black tea waste : goat manure + 30 ml EM4). Bvariations include B1 variation (1 : 1), B2 variation (3 : 2), B3 variation (7 : 6), and B4 variation (7 : 8). Theresult of this research shown most optimal composting is B3 variation with content of Organiccarbon:Nitrogen:Phospor:Kalium: C/N ratio: water content is 12,411% :1,063% :0,581 %:K 1,608%:11,68: 46,464 .

PENGOMPOSAN DENGAN MENGGUNAKAN LUMPUR DARI INSTALASI PENGOLAHAN AIR LIMBAH INDUSTRI KERTAS DAN SAMPAH DOMESTIK ORGANIK Badrus Zaman; Ika Bagus Priyambada
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Waste water treatment of paper industry yield side product in the form of sludge which have generated problembecause there is no continuation processing. Composting sludge which come from waste water processing differfrom other composting organic solid waste, which generally in the form of dry substance. In this research usedadditional substance in the form of organic domestic solid waste, with variation sludge : domestic solid waste(kg/kg) successively 1 : 1, 1 : 4, 1 7, 3 : 2, and 5 : 3. Composting method is done by open windrow, where thecompost heaped longly and let to be opened (aerob). Result of research indicate that to the overall of variationof compost really have fulfilled standard of good ripeness compost according to SNI 19-7030-2003 and alsoaccording to other ripe compost standard. Besides, all variation of compost have yielded ripe compost withcharacteristic fulfilling hara required by crop. Variation Compost 1 : 1 representing the best compost with COrganiccontent 41,507 %, N-Total content 3,008 %, ratio C/N 13,80, moisture rate 44,03 %, P-Total content1,085 %, K-Total content 4,183 %, final temperature 30,3° C and pH 7,98

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