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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 13 Documents

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Search results for , issue "Volume 31, Nomor 1, Tahun 2010" : 13 Documents clear

PENAJAMAN DAN SEGMENTASI CITRA PADA PENGOLAHAN CITRA DIGITAL Awaluddin, Moehammad; Darmo Y, Bambang
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

Image processing takes an image to produce a modified image for better viewing or some other purposes Imageanalysis takes an image into something other than an image such as number of object types, size of an object,etc.The main purpose of Enhancing Image is to produce image in order to have a suitable image forApplication requirement. Image segmentation is divided into a several segment considering area of the object.We need the Enhancement technique and segmentation to have a good image. In this case , it was trying toprocess image with a several stage , stretching, lowpass filter, laplace filter, edgesenh filter and clustering inSPOT image in aceh coverage area.

EFFECT OF NITROGEN SOURCE AND INITIAL SUGAR CONCENTRATION ON LACTIC ACID FERMENTATION OF PINEAPPLE WASTE USING L.DELBRUECKII Moch Busairi, Abdullah
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

The liquid pineapple waste contains mainly sucrose, glucose, fructose and other nutrients. It therefore can potentially be used as carbon source for lactic acid fermentation. The lactic acid is utilised in food technology as pH regulator, microbial preservative, buffering agent and in the chemical industry. Recently, lactic acid has been considered to be an important raw material for production of biodegradable lactate polymer. The experiments were carried out in batch fermentation at anaerobic condition with stirring speed: 50 rpm, temperature: 40 oC, pH: 6.0, and inoculum size: 5%. Effect of nitrogen source and initial sugar concentration were studied. The effect of nitrogen source on lactic acid production shows that the yeast extract is highest yield , followed by urea , corn steep liquor, malt sprout and ammonium sulphates with the yield of 78.52; 26.68; 19.14; 14.10 and 5.6 %, respectively. The highest yield of initial sugar concentration on lactic acid production obtained was 78.52 % (54.97 g/l) at 70 g/l, if the concentration of sugar was increased to 110 g/l , the lactic acid production or yield decrease to51.53 g/l or 54.24%.

PENGEMBANGAN DESAIN STARTING BLOCK KOLAM RENANG DENGAN MENGGUNAKAN THEORY OF INVENTIVE PROBLEM SOLVING (TRIZ) Nurkertamanda, Denny; Ahman, Asen
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

Swimmingpool starting block is one of swimming equiptment that must be used in swimming sport competition.It used not only by senior athlete but also the beginner. In addition, it used not only in one swimmingpool butalso another pool which has different height of watersurface and swimmingpoll wallside.Now, the condition of starting block only fit with some of athlete. The other athlete had difficulties when use it.Because of that, design improvement need to be done for starting block to be adaptable for all athlete in anyage and adaptable for the condition of watersurface.Adaptability fitur improvement for starting block makes fitur stabilition of product composition getting worse,and those things is unwanted. So that Theory of Inventive Problem Solving (TRIZ) method is needed to solvethe problem technical contradiction so the ideal final output can be reached.Adaptable starting block design can be reached after solve the technical contradiction happened when solvingthe problems used TRIZ. Reducing the parameters which had disadvantages for the ideal final product suchas: weight of the moving object, quantity of the material used, dangerous factor of the object, and dangerousfactors from environtment.

DESAIN KAPAL IKAN DENGAN BENTUK LAMBUNG CATAMARAN YANG MENGGUNAKAN SISTEM PENGGERAK LAYAR AN MESIN UNTUK MUATAN IKAN HIDUP Manik, Parlindungan; Sasmito Hadi, Eko
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

The Application Of Catamaran Hullform For The Fishing Vessel accorded to the leakage of the monohullform. The existence and the using of the lively fish hold could help the fisherman to decrease theoperational cost for about 11,8% to keep the fishes. Therefore the application of sail objected to reduce thebiggest cost operation component that is the fuel consumption. Catamaranhullform design for lively fish holdtook one hullform which has the best performance. The performance aspects in this case are the hydrostatic,ship resistance, stability and seakeeping.The research about catamaran fishing vessel design for lively fishes using sail and machine as the ship moveris expected to give the information about the hullform that has a better performance than the commonlyhullform and it could be an alternative to improve the fishing vessel hullform into the modern one.Accorded to the calculation result and analysis are gained the result that showed at the velocity of 12 knotsfrom some length dimension variations of fish hold for the catamaran fishing vessel with lively fish hold,variation of length of 2,0 meters could reduced the biggest shipâ€™s resistance for about 3,99% between theother modification hullform and the shipâ€™s resistance of standard hullform. Otherwise, by the stability aspectof any variation condition, fish hold length dimension variation at 2,0 meters had a better stability thananother fish hold length dimension and catamaran fishing vessel which used the commonly fish hold. Theinstallation of sail at the fish hold length dimension at 2,0 meters could reduce the power operation for about48,42% better than fishing vessel that used the commonly fish hold.

UJI KETELITIAN HASIL KOREKSI GEOMETRIK CITRA SATELIT ALOS PRISM DENGAN HITUNG PERATAAN KUADRAT TERKECIL METODE PARAMETER Sudarsono, Bambang; Julzarika, Atriyon
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

Remote sensing is a branch science of Geodesy Engineering that using satellite applications for survey andmapping. One of the natural resources satellite that be used for mapping is Alos Satellite.It is own of Japan, italso could be used in 3D Application, especially Prism and Palsar. There are some methods for making 3Dapplication that are stereo mode, interferometry, and DSM2DEM. Geometric correction of this satellite is veryimportant so it needs a study for its statistical test. Alos satellite have 3D shape as Digital Terrain Model(DSM), not Digital Terrain Model (DTM), Digitallen HÃ¶heModellen (DHM), Digital Geoid Model (DGM) orDigital Elevation Model (DEM). Alos satellite that be used are Alos Prism where it has spatial resolution in 2.5meter. The reference system of 3D model that are produced by Alos satellite image still as surface for z axis, forx axis and y axis has been closed to 2D reference system in some certain datum and system of map projection.So, this research will give result of its accuracy and precision and it could uses for the reference system.For its statistical test, it needs a method for checking its accuracy. It is least square adjustment in parametermethods. In case, it needs a research for observate the accuracy and precision of Alos satellite data using aleast square adjustment of parameter methods. Data from Alos satellite will be compared with data from Globalpositioning System (GPS) of geodetic. The results of this research will be used as reference for next research toinvent a way for changing DSM from satellite, radar, air video and interferometry-automatically.

PENYELIDIKAN OPERASI PINTU INTAKE EMBUNG SAMIRAN DENGAN UJI MODEL HIDROLIK Kurniani, Dwi; Kirno, Kirno
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

A manual of intake gate operation for embung is an important tool it depends. One factor which is decidingthe manual is operation of gate system. If the system of gate operation of intake gate are wrong will havenegative water use . To make the most precise of manual operation of intake gate embung Samiran must beendone physical model test. From this test result of physical model test can be used as a guidance or referenceprototype application.

SISTEM INFORMASI JARINGAN IRIGASI (SIJARI) KABUPATEN SUKOHARJO BERBASIS PROGRAM ARCVIEW GIS 3.3. Sriyana, Sriyana
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

Data availability of irrigation area authority, discharge data, physical condition of weir, channel condition,hydraulic structure damage, finance needed for recovery etc are sometimes unclear, invalid and lost in data,low service and poor performance, resulting planning interest, monitoring implementation and controlunfulfilled. The purpose of this thesis is to make SIJARI software (Sistem Informasi Jaringan Irigasi )whichcontains data base information of Irrigation in Geographic Information System(SIG), based on Arcviewprogram GIS 3.3. The result of SIJARI software contains all data base information starting from irrigationarea authority, structures damage, channel condition, crop pattern etc, where all data can be fast andaccurately accessible and can be used for pre-plan, planning, implementation, monitoring and control.

PENGARUH UKURAN UTAMA KAPAL TERHADAP DISPLACEMENT KAPAL Utomo, Budi
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

Displacement is weight water which is replaced ship hull. The displacement influenced by dimension of inmerchant ship. The displacement musat be small as posible, but the capacity and the speed must be pullfill.Dsplacement can be obtained by formulation or by experiment in hydrodinamika laobatory, the modelingcharacteristic us descube the real Calculation of the ship.The form of the ship must give the resistaise as small as posible. In athe hard the capacity must be full fill ofload

PENYELIDIKAN POLA ALIRAN EMBUNG SAMIRAN DENGAN UJI MODEL HIDROLIK FISIK Ari Wulandari, Dyah; Kirno, Kirno
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

Samiran Dam is located in Grawah river, Boyolali Regency, Central Java Province. The aim of Samiran Damis for service water supply. The hydraulic model test are conducted for clarifying the appropriateness ofhydraulic design, to perfect and optimize the hydraulic design of the spillway. One of the main objective is tostudy the flow pattern approaching spillway, at spillway, stilling bazin and river in the downstream of thestilling bazin.The detail model is made as three dimensional model, covering the part of reservoir, spillway, stilling bazin andriver in the downstream of spillway. The hydraulic model test was carried out in The Hydraulic Laboratory ofExperimental Station for River in Surakarta.Base on the study result then there are necessary to modified design of the stilling bazin and to add groundsillconstruction at the river in the downstream of the stilling bazin

SIMULASI TEKNIK POWER CONTROL DAN MULTI USER DETECTION PADA SISTEM KOMUNIKASI DS-CDMA Christyono, Yuli
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

CDMA is interference limited multiple access system. Because all users transmit on the same frequency,internal interference generated by the system is the most significant factor in determining system capacity andcall quality. The transmit power for each user must be reduced to limit interference, however, the power shouldbe enough to maintain the required Eb/No (signal to noise ratio) for a satisfactory call quality. Maximumcapacity is achieved when Eb/No of every user is at the minimum level needed for the acceptable channelperformance. As the MS moves around, the RF environment continuously changes due to fast and slow fading,external interference, shadowing , and other factors. The aim of the dynamic power control is to limittransmitted power on both the links while maintaining link quality under all conditions. Additional advantagesare longer mobile battery life and longer life span of BTS power amplifiers.In this research will be made a sumulation of power control and multi user detection to avoid the interferencebetween MS.Observations show that the increasing number of users will decrease the value of Signal to Interfrence Ratio(SIR) / SIR below the target. To cope the growing number of users increases can be done by iteration / updatingpower transmit so the convergence computation can be reached and target value SIR can be achieved. Inaddition, to reduce interference can also be done by extending the number of chips.

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