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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 522 Documents

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Analisis Energi Panas Pada Alat Pengeringan Gabah Tipe Swirling Fluidized Bed Putra, Satya Andika; Novrinaldi, Novrinaldi
TEKNIK Vol 40, No. 2 (2019): Agustus 2019
Publisher : Diponegoro University

Gabah merupakan produk hasil pertanian berupa biji-bijian yang proses pengeringannya mayoritas masih menggunakan cara tradisional yaitu dengan menghamparkan langsung dibawah sinar matahari. Pengeringan seperti ini tidak sesuai ketika musim hujan karena proses pengeringan gabah tidak berlangsung dengan baik sehingga kualitas gabah menurun. Solusinya adalah dengan menggunakan pengering. Salah satu tipe pengering yang dapat digunakan untuk gabah adalah pengering tipe swirling fluidized bed (SFB). Alat pengeringan gabah tipe SFB terdiri dari ruang pengeringan dan ruang plenum dengan diameter 400 mm, selubung tengah pada ruang pengeringan berbentuk kerucut dengan diameter 300 mm, selubung tengah ruang plenum berbentuk silinder diameter 300 mm, distributor terletak diantara ruang pengeringan dan plenum yang terdiri dari 100 sudu dengan kemiringan 45Â°, dan dua saluran masuk udara berbentuk silinder yang masing-masing dilengkapi dengan pemanas dan blower dengan laju udara suplai 12 m3 /menit. Artikel ini menyajikan analisis energi panas pada alat pengeringan gabah tipe SFB. Analisis dilakukan secara teoretis berdasarkan prinsip-prinsip termodinamika dan perpindahan panas dengan menggunakan beberapa data hasil pengujian. Data diperoleh dari mengeringkan 300 gram gabah jenis Ciherang selama 60 menit. Hasil analisis menunjukkan bahwa energi yang dibutuhkan untuk mengeringkan gabah dari kadar air 26,8 % menjadi 13,78 % adalah sebesar 121.756,04 J. Laju perpindahan panas dari udara pengering ke gabah sebesar 780,28 W. Sedangkan energi panas yang harus disuplai oleh pemanas adalah sebesar 3943,86 W

STUDI PEMANFAATAN ENERGI GELOMBANG LAUT UNTUK PEMBANGKIT LISTRIK Suyadi, Suyadi
TEKNIK Volume 29, Nomor 1, Tahun 2008
Publisher : Diponegoro University

In the case of the exploration on renewal energy sources and non fossil energy sources, the writer hasmade a concept of development method in using sea wave for electrical plant as an effort to develop theelectrical plant system by using renewal energy sources. This system uses pontoon to press the sea waterinto tanks, then the generated pressure is used to move turbine. Cylinder pontoon may be floated byproducing maximum heave at the type weight = 0,65. At this type weight surge and pitching movement cannot be reduced until zero, however it may reduces the other movements like rolling and translating, namelyby: DL < 0,615H and DL < 0,175Î», the buoyancy value is 75,4% from its diameter sink in the water or thevolume buoyancy of the floated part that is 15% from the total volume of cylinder. The energy that may beboosted depends on the pontoon's weight which can be pulled by one way of wave, amplitude, and naturalperiod of the wave. The research gives method of electrical energy and estimation and boosting boosted byone way of wave. The result of energy estimation which can be boosted for wave length is 1,20 m and waveheight is 0,50 meter, the energy that can be boosted is 0,02Kw, for wave length 4,00 meter and wave height2,00 meter, the energy that can be boosted is 23,06Kw for wave length 4,00 meter and wave height 8,00meter the energy that can be boosted is 737,89Kw.

PENERAPAN TEKNOLOGI INFORMASI UNTUK PEMERINTAH DAERAH Iman Satoto, Kodrat
TEKNIK Volume 29, Nomor 3, Tahun 2008
Publisher : Diponegoro University

In developed countries like the United States and European countries, the application of informationtechnology in the areas of government have been significantly in creating a clean government andtransparent. Some examples include the implementation of the model B2B (business to business ecommerce)applications for the procurement of goods and services electronically (e-procurement), theshort message technology to accelerate the delivery of information and web-services to facilitate otherparties to get information although different technology and platform.Meanwhile, in our countries, the application of information technology in the field of governance is stillvery limited. This is because the source of funds and skilled human resources are very limited. Someexamples of the application of information technology that is already there; Portal made for each office,portals for profile local government and application for one stop services. Most of the local governmentbuild the system information partially so can occurred distortions such as inconsistencies of information.Apparently there has been no local government in Indonesia that utilize ICT (information andcommunication technology) extensively to achieve good governance.It is time for local governments to apply information technology, which currently is very mature to be ableto realize the government is clean and transparent. Starting with building a complete database (datacenter),followed by developing applications that require each local government office and eventually builtan executive information system that can generate strategic information needed to help make decisions.

Rancang Bangun Mesin Pengolah Limbah Kain dan Kertas Sebagai Bahan Industri Eternit Dahlan, Mohammad; Winarso, Rochmad; Slamet, Sugeng
TEKNIK Vol 37, No 1 (2016): (Juli 2016)
Publisher : Diponegoro University

Di Kabupaten Kudus, saat ini berkembang UMKM dalam usaha pembuatan eternit. Bahan baku pembuatan eternit terdiri ini terdiri dari semen dan serat kain. Disatu sisi, di Kabupaten Kudus banyak tumbuh sentra-sentra industri garment seperti di desa Langgar Dalem, Loram Wetan, Loram Kulon, Megawon, Klumpit, Undaan dan masih banyak lagi yang menghasilkan limbah kain tidak termanfaatkan. Untuk itu diperlukan inovasi dalam memanfaatkan bahan baku yang melimpah tersebut guna memenuhi UKM pembuatan eternit. Tujuan dari penelitian ini adalah merancang bangun mesin pengolah limbah kertas dan kain menjadi bahan baku eternit untuk produksi UKM eternitdengan kapasitas 1200 gr/putaran. Tenaga penggerak menggunakan motor listrik 6 PK, 3 phase putaran 1400 rpm, sehingga kapasitas maksimal mesin crusher sebesar 120 kg/jam. Metode yang digunakan dalam penelitian ini adalah: 1) melakukan survey ketersediaan bahan baku berupa sampah kain/kertas, serta menganalisa kualitas serat penguat bahan baku. 2) merancang desain dari mesin pengolah limbah kain/kertas, 3) menentukan kebutuhan komponen serta kesiapan laboratorium pendukung yang akan digunakan untuk membuat mesin tersebut. 4) pengujian mesin yang telah dirancang. Telah dirancang mesin pengolah limbah kertas dan kain dengan kapasitas mesin crusher sebanyak 1200 gr/putaran, sebagai bahan baku eternity untuk meningkatkan kapasitas produksi industry eternit. Direncanakan kemampuan tenaga penggerak menggunakan motor listrik 6 PK, 3 phase putaran 1400 rpm, sehingga kapasitas maksimal mesin crusher sebesar 120 kg/jam. [Title: Machine Design of Cloth Fiber and Paper Wastes Conversion to Plasterboard]. Nowadays, UMKM industry producing plasterboard has been being developed in Kudus regency. The raw material used in producing plasterboard consists of cement and cloth fiber. On the other hand, there are also many garment industries developed in Langgar Dalem, Loram Wetan, Loram Kulon, Megawon, Klumpit, Undaan and many more which result in cloth waste. Therefore, innovation is needed to make use of those abundant raw material in order to fulfil the need of UKM in producing plasterboard. This research is aimed at designing a model of a processor machine for processing cloth and paper waste into basic material for producing plasterboard, with capacity of 1200gr / round. This machineâ€™s propulsion uses 6 PK elcetric motor, 3 round phases 1400 rpm, so that the maximum capacity of the crusher machine will be 120 kg / hour. The research methods used are: 1) doing survey on raw material supply, includes cloth or paper waste, and analysing the quality of their fiber; 2) designing a model of a processor machine for cloth and paper waste; 3) determining what components are needed as well as the the readiness of supporting laboratory which will be used to build the machine; 4) testing the machine once it is built. This machine is used as a basic tool to produce plasterboard. With this machine, it is expected that the plasterboard production will increase significantly. This machineâ€™s propulsion is designed to use 6 PK electric motor, 3 round phases 1400 rpm, so that the maximum capacity of the crusher machine will be 120 kg / hour.

PENGARUH PERUBAHAN KECEPATAN KAPAL TERHADAP TINGGI PERMUKAAN AIR DI SISTEM FLUIDA DI DALAM PALKA PADA KAPAL IKAN MUATAN HIDUP TIPE KATAMARAN DENGAN PENDEKATAN CFD Sasmito Hadi, Eko; Manik, Parlindungan; Iqbal, M.
TEKNIK Volume 32, Nomor 3, Tahun 2011
Publisher : Diponegoro University

The existence and the use of live fish hold system, can help fishermen to reduce the operating costs in fishpreservation 11.8%. The live fish hold system, which fish hold were given circulation hole so the water insideand outside the hatch is connected, there should be researched about the changes and differences in pressurethat happened when the ship moves.Initial condition where the ship is not moving, surface of water in the fish hold will be the same height with adraught of ship. When the ship began to move out, the pressure of fish hold will decrease along with increasingthe speed of the ship. This will caused a decrease of water surface elevation in fish hold.According the calculation and analysis we found on the speed of 12 knots the water surface elevation in hold ispositive with a value 0,3947 m on to 0,20 m diameter of hole circulation (before variation), 0,4515 m on to 0,15m diameter of hole circulation, 0,4656 m onto 0,25 m diameter of hole circulation, 0,4718 m on to 0,20 mdiameter of two pieces of hole cilculation and -0,9410 m for manual calculation with all variations.The optimum hole circulation was chossen at two pieces of diameter of 0,20 m because on the speed 12 knots,the water elevation is 0,4718 m. This value is the higest among the other variations of the cilculation hole

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.

Penentuan Potensi Sumberdaya Batu Gamping Sebagai Bahan Baku Semen Daerah Gandu Dan Sekitarnya, Kecamatan Bogorejo, Kabupaten Blora, Jawa Tengah Widiarso, Dian Agus; Kusuma, Istiqomah Ari; Fadhlillah, Ajiditya Putro
TEKNIK Vol 38, No 2 (2017): (Desember 2017)
Publisher : Diponegoro University

Kebutuhan pembangunan infrastruktur selalu meningkat seiring dengan pertumbuhan penduduk. Industri konstruksi membutuhkan batugamping yang merupakan bahan pembuatan semen untuk pondasi konstruksi bangunan. Salah satu daerah yang memiliki potensi batu gamping adalah daerah Gandu, Kecamatan Bogorejo, Blora, Jawa Tengah. Penelitian ini bertujuan untuk melakukan eksplorasi potensi batu gamping di daerah Gandu. Pemetaan geologi dilakukan untuk menentukan litologi utama daerah penelitian dan distribusinya. Analisis kualitas batugamping juga dilakukan dalam penelitan ini, denganÂ mengkaji komposisi kimia batugamping. Diharapkan hasil penelitian ini dapat digunakan sebagai dasar pemanfaatan batugamping untuk kebutuhan industri semen. Hasil penelitian menunjukkan bahwa stratigrafi regional area penelitian terdiri dari empat satuan batuan, yaitu batulempung karbonan, batugamping, kristalin batupasir kuarsa, dan batugamping. Hasil penelitian juga menunjukkan bahwa batugamping dari daerah Gandu memiliki unsur CaO cukup besar dan unsur Mg sedikit, walaupun di beberapa tempat banyak ditemukan unsur Mg. Perbandingan hasil analisis komposisi kimia dan standar bahan baku semen menunjukkan bahwa kapur di daerah Gandu memenuhi kriteria bahan baku semen

STEEL-SLAG AS SUBSTITUTE TO NATURAL AGGREGATES, PROPERTIES AND THE INTERFACIAL TRANSITION ZONE Lie, Han Ay
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

Steel-slag is a residual product of the steel industry that has potential ability to pollute the ground water and soil containing heavy metals. To overcome this problem, attempts have been made for using the slag as substitute for both coarse and fine aggregates in concrete. The solidification process will prevent the metal components from polluting the water and soil. Test results on the mechanical properties of slag-concrete showed that while the compression strength of slag-concrete increased significantly as a function of slag-to-natural aggregateâ€™s use, the tensile strength dropped accordingly. The substitution of fine-slag to Muntilan sand was even more negative, the compression strength decreased as a function of slag use. Research into the influences of the Interfacial Transition Zone was conducted, since the ITZ itself forms a weak link within the concrete matrix. The SEM tests were performed at the Quarter Laboratory, Department of Geology in Bandung using a Scanning Electron Microscope type JEOL.

BENTUK KERJASAMA PUBLIC-PRIVATE PEMBANGUNAN GRAVING DOCK DAN MANAJEMEN GALANGAN KAPAL DENGAN METODE ANALYTICAL HIERARCHI PROCESS (AHP) Hartono Hartono; Arif Hidayat; Jati Utomo Dwi H
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

In paper Development of port infrastructure in Indonesia is now no longer the responsibility of centralgovernment, along with limited funds and the government's insistence seaport infrastructure needs. Toaccelerate economic growth, the government issued Government Regulation as a legal umbrella. The purpose ofthis study was to examine public-private partnership opportunities in the construction of graving dock andshipyard management. Targets do is review, the criteria are prioritized cooperation and cooperationpriorities.This study used qualitative and quantitative approach, a descriptive qualitative approach throughinterviews used to assess the normative aspect. The quantitative approach used to assess the priority criteriaforms of cooperation and public-private partnership in development graving dock and shipyard management byusing the Analytical Hierarchy Process (AHP). Based on the AHP analysis can be concluded that the expertsdisagree about the priority criteria of cooperation, where the majority of them choose the duration as the maincriterion. As for the analysis of priorities of the cooperation of all experts choose Built-Operate-Transfer (BOT),which is deemed suitable for long-term investment of up to 30 years. BOT puts private partners to more freely tofinance, construct, operate, anticipated rate of return on capital (rate of return) and the risks of commercial andregulatory aspects

Pengembangan Robot Humanoid Pemain Bola Otonom Afrisal, Hadha; Munadi, Munadi; Faris, Muhammad; Ardi Sumbodo, Bakhtiar Alldino
TEKNIK Vol 40, No. 1 (2019): Mei 2019
Publisher : Diponegoro University

This research aims to develop an autonomous humanoid soccer robot. The humanoid soccer robot is designed using 20 joints which are equipped with dynamixel servo motor AX-12 (upper body) and RX-24 (lower body) and is controlled by using servo controller board CM-700 (ATMega2561). The humanoid soccer robot is 44 cm in height and is equipped with a balancing system of using gyro sensor LPR530 and accelerometer KXM52-1050. In order to detect object and to navigate autonomously, the humanoid soccer robot is equipped with a CMOS camera which is controlled using CMUCAM board (LPC2016). The experiment shows that the humanoid soccer robot has ability to walk with average speed of 14.37 cm/second and is able to achieve a top speed of up to 20 cm/second. The developed humanoid soccer robot can play soccer autonomously: to locate the ball, to detect the goalpost, and to score the goal to the goalpost.

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