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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 12 Documents

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Search results for , issue "Volume 30, Nomor 1, Tahun 2009" : 12 Documents clear

PENURUNAN MODEL PERMUKAAN DIJITAL (DSM) MENJADI MODEL ELEVASI DIJITAL (DEM) DARI CITRA SATELIT ALOS PALSAR (Studi kasus: NAD Bagian Tenggara, Indonesia) Julzarika, Atriyon; Sudarsono, Bambang
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

Alos satellite is one of the natural resources satellite that could be used in 3D applications. The problemsthat be taken in generate 3D model with satellite imagery are the model always be formed as DigitalSurface Model (DSM), not Digital Terrain Model (DTM), Digitallen HÃ¶heModellen (DHM), Digital GeoidModel (DGM) or Digital Elevation Model (DEM). The reference system of 3D model that are produced byAlos satellite image still as surface for z axis, for x axis and y axis has been closed to 2D reference systemin some certain datum and system of map projection. In case, it needs a research for observating theaccuracy and precision of Alos satellite data using a least square adjustment of parameter methods. Theresults of this research will be used as reference for next research to invent a way for changing DSM fromAlos satellite image to be DEM, DTM, DHM, DHM, and DGM digital-automatically. It is a new innovationof differentialing technical of 3D model.A differentialing technical from DSM to be DEM could be done with least square adjustment in parametermethods. It calls DSM2DEM*. This new innovation methods for differentialing DSM2DEM. In that studycases, differentialing technical that are used be divided for two class, that are lowland area and highlandarea. Differentialing in that two class use similar methods, just is differentiated in sum up of researchingpoints that are used. In this research study of cases are in highland area and lowland area. In highlandarea uses minimize 14 researching points and in lowland area uses minimize seven researching points.That differentialing technical are done in Alos images. In other satellite images, photos, videos that studyin highland and lowland area also use this methods for differentialing DSM2DEM. Order level that areused as research points will influence the quality of its data accuracy and precision.

PENGENDALIAN MESIN HOIST HANGER DALAM PROSES PTC/ED MENGGUNAKAN PLC OMRON Wahyudi, Wahyudi; Asâ€™ari, M. Hasim
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

The development of technology demands efficient and work speed, so it needs a system which can handleseveral things.This problem can be covered with PLC (Programmable Logic Control) that can integrateseveral self standing component to be an integrated control system and can be changed the configurationwithout change all instrument. Modify the ladder program can alter system of PLC. This paper showsHoist Hanger system in PTC/ED (Pre Treatment Chemical/Electrocoat Dispotition) process that controlledby PLC. Above input from limit switch, sensor, or the other input, PLC system drives the motorrelay Hoist Hanger machine. That cause the motor relay Hoist Hanger change its condition, so the movingof Hoist Hanger machine will be suitable with PLC program.

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.

IKON KOTA SEMARANG Ediati, Murni
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

As we know that our forefatherâ€™s culture inheritance should protected such as the old historical building,monument and so on. We should not just close our eyes and then ignore it. Lawangsewu building is one ofthe old historical buildings as a landmark and icon for the City of Semarang. It is also a national culturalasset and one of the tourism resorts so basically itâ€™s dealing with the Indonesian law, regulation and thegovernmentâ€™s authority.Actually there are a lot of foreign and domestic investors who want to use Lawangsewu building as a hotelbut usually it has been just a topic without an action. Nowadays, most of the historical buildings inSemarang are â€˜lostâ€™ and it has been uncountable how many of them were lost because of the economic andpolitical reason.The City of Semarangâ€™s government has goodwill on planning and managing toward the Lawangsewubuilding because of the terribly condition of it (there is a lot of damaged because of a lot of exhibition weretook place in that building). One of the plans was about using it as Semarang Tourism and CultureDepartment, Semarang Centre of Tourism Information, Centre of Planning and Development Information ofThe City of Semarang.Recently there are some creative and innovative ideas appears to utilize the old historical buildings. Itmeans that now our people are understood about the significance of â€˜the mute witnessâ€™ of our cityâ€™s history.Let us together make Semarang as the greatest city. For me the great city is the city which has a past,present and future. The great city always be an ideal city for all of us.

PRODUCTION OF INDUSTRY SALT WITH SEDIMENTATION â€“ MICROFILTRATION PROCESS: OPTIMAZATION OF TEMPERATURE AND CONCENTRATION BY USING SURFACE RESPONSE METHODOLOGY Widayat, Widayat
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

The salt of sodium chloride commonly used consumption in house , so as a raw material in industry. Thequality of salt depends on sodium chloride concentration. The objective of this research is obtained ofoptimum condition in production of salt industry by using sedimentation and microfiltration process. Theoptimization used surface response methodology and analysis by Statistica 6 software. The responseperceived is NaCl concentration in product. The experiments do by mixing stearic acid with NaOH solutionto product stearic sodium. Then, the solution mixed with sea water, so the white solid will be emerge, thereare stearic calcium and stearic magnesium. And so filtrate evaporated until to obtain salt. TheMathematical model for reduction of Ca2+ and Mg2+ are1 222 221 1 Y = 93,3185 + 1,0967 X + 0,1909 X +1,0682 X - 0,2333 X - 0,3376 X X , with maximum conversion is94,46% at temperature 82,42oC and stearic sodium concentration 14,16%(v/v). The maximum of NaClconcentration is 96,19% at temperature 81,54oC and stearic sodium concetration 13,11 %(v/v). Themathematical model for NaCl production is1 222 221 1 Y = 92,7596 - 0,3443 X - 3,3706 X + 2,9553 X - 0,9562 X - 1,9272 X X . The results of NaCl not yetfulfilled with SNI industry salt. The NaCl concetration in SNI is 98,5%. So, this process is nt aplicable forproductiob salt industry in Indonesia.

IDENTIFIKASI IRIS MATA MENGGUNAKAN TAPIS GABOR WAVELET DAN JARINGAN SYARAF TIRUAN LEARNING VECTOR QUANTIZATION (LVQ) Setiyono, Budi; Isnanto, R. Rizal
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

Biometric represents the human identification method development using natural characteristic of humanbeing as its bases. Every iris has the detail and unique texture, even differ between right and left eye.Theeye iris identification process in this research are data acquisition, early processing, feature exctractionand classification. Algorithm used for classification of texture slice the eye is Gabor wavelet filtering, andclassification process of slice the eye texture will be used by a Artificial Neural Network LVQ. Recognitionthe value of feature vektor in each iris obtained from to the number of right recognition value or thepercentage of right one. The best recognition percentage is 87,5 %.

PENGENDALIAN LANTAI PABRIK DENGAN LOAD ORIENTED MANUFACTURING CONTROL PADA INDUSTRI MEBEL (STUDI KASUS PT â€œXâ€) Hartini, Sri; Saptadi, Singgih; Kadarina, Nurlaila
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

Load Oriented Manufacturing Control (LOMC) is an input-output control system development thatconsidered work load in every work center. Production planning starts with determining production leadtime, then work load control (WLC). WLC consist of defining criteria and determining release procedure tothe shop floor for items that will be processed. This research tried to implement LOMC concept in afurniture company called PT.X. The result of the research showed that LOMC could improve throughputand minimize work in process (WIP).

PEMISAHAN LARUTAN MENJADI FRAKSI-FRAKSINYA MENGGUNAKAN KHROMATOGRAFI ANNULAR KONTINYU S Retnowati, Diah
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

Chromatography can be used for analysis or separation. This review describes continuous annularchromatography for separation of enantiomers or isomers. These type molecules are hardly separatedwith conventional separation, and therefore need a good separation method. Continuous AnnularChromatography consists of a rotating annular bed. The annulus is formed between two concentriccylinders, and the resin is packed in the annulus. At fix position at the top of the bed, four solutions arecontinuously fed, the feed mixture to be separated, a displacer solution, a regenerant and a rinse. TheAnnulus is slowly rotated with the result that different zones will formed helices of characteristic anglewhich can be collected at variations fixed points around the bottom of the bed.

STUDI PERENCANAAN SISTEM UNTUK PENDUKUNG KEPUTUSAN PROYEK KAPAL BANGUNAN BARU Suyadi, Suyadi
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

Since Presidential decree No 5 2005 on the empowerment of the Indonesian shipping industry applies, theIndonesian shipbuilding industry has officially gained support from the Indonesian government to be able tocompete in the national as well as international market. Along with the globalization era and a lot ofshipbuilding orders, the shipyard management has to do some improvement to the shipyard to be morecompetitive. One of efforts that should be done is by improving the management of incoming orders. This isvery important to do because during this time the shipyard management has to collect a lot of informationfrom departments in the shipyard manually to consider accepted shipbuilding orders.In this paper, a new model to manage new shipbuilding orders is developed. The model is implementedwithin a computer-based decision support system that is related to an existing system of production, planningand control in the shipyard. The approach used in the development of this system is ROMC (Representation,Operation, Memory Aids and Control Mechanism).The aim of the developed decision support system is to assist all decision makers in defining problems,developing alternative solution; , and chosing various alternative decisions in the system development thereare three steps to be done : (i) building data base, (ii) building model base, and (iii) building dialogue base

ANALISIS KEBUTUHAN PERANGKAT LUNAK MENGGUNAKAN ANALISIS FAKTOR PADA PROGRAM STUDI ILMU KEPERAWATAN UNDIP Handoyo, Eko; Setiawan AR, Adnan
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

The need to obtain the speed and information accuracy provided in an organization conducting dataprocessing in gross, complex and finite during make the organization require the information system tosupport their business.Systems analysis represent the early stage in determining quality of system development in informationsystem to be developed. Analysis of Requirement of sistem, one of the phase of systems analysis, haveplaying important role to formulate what must be owned and done by an information system.This report using quistioner of the measuring instrument by using modification of Likert scale for onehundred responder to get the data. Processing data is conducting bytest of validity and reability, thenfactor analysis is done for formulation of system requirement.

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