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TEKNIK

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Published by Universitas Diponegoro

ISSN : 08521697 EISSN : 24609919 DOI : -

Core Subject : Engineering,

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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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STRATEGI PERBAIKAN - PENGGANTIAN BERDASARKAN UMUR PRODUK UNTUK GARANSI SATU DIMENSI Ika Rinawati, Dyah
TEKNIK Volume 32, Nomor 1, Tahun 2011
Publisher : Diponegoro University

When the manufacturer selling products with warranties, it causes additional costs (called warranty costs) toservice any claims under warranty. Reducing warranty costs is an issue of great interest to manufactures. Thethree ways to reduce warranty costs i.e. improving product reliability, use of preventive maintenance andwarranty servicing strategy.This research deals with a warranty servicing strategy for items sold with a one dimensional warranty where theperiod offered is relatively long. For instance, a computer warranted for three years. For repairable productssold with free repairable warranty (FRW), the manufacturer has the option of either repairing or replacing thefailed item with a new one.In the strategy studied, the decision of repairing or replacing the failed item under warranty is based on its ageat failure. Under the strategy, for failures with age being greater than or equal to threshold parameter will berectified by replacement and all other failures under warranty will be repaired. This strategy is characterized bya threshold parameter which minimizes the expected warranty cost. The optimal parameter is sought by usingnumerical computation. Some numerical examples are given for the purposes of illustration.

TEKNOLOGI PEMETAAN DIGITAL UNTUK PENGEMBANGAN KAWASAN PEMUKIMAN PERUMAHAN ( STUDI KASUS : BUKIT SEMARANG BARU- SEMARANG) D Yuwono, Bambang; Haniâ€™ah, Haniâ€™ah
TEKNIK Volume 28, Nomor 1, Tahun 2007
Publisher : Diponegoro University

In recent years the requirement of housing have been growing, such growth of population requires theimprovement of quality and quantity. As consequence, the developer which has responsible for this, shouldincrease and apply the enhanced technology. BSB is one of the biggest developer in Central Java hadapplied the digital mapping as solution for developing area.This research is purposed to study and evaluate application of digital mapping for developing housingcoverage area. The study is started from the fact that with using conventional tool of measurement can nothandle the project which need speed, accurate manage data to develop area. .Using digital mappingControlling and maintaining data more easily and Accurate.

Pengembangan Transportasi Sungai Kota Semarang Sebagai Transportasi Perintis Tujuan Wisata Air (Studi Kasus Kanal Banjir Barat Kota Semarang) Ismiyati Ismiyati; Hary Budieny; Moga Narayudha; Salamun Salamun; Anggara Dharma Putra; Wiweka Reka Wiweka Reka
TEKNIK Vol 37, No 2 (2016): (Desember 2016)
Publisher : Diponegoro University

Perkembangan pariwisata di kota Semarang ditandai dengan tersedianya fasilitas shuttle bus gratis. Rute shuttle bus tersebut melewati rute Kuliner Pekunden, Pusat oleh-oleh Pandanaran, Gedung Lawang Sewu dan Daerah Kota Lama Semarang.Sejak tahun 2012, wisata di tepi Sungai Kanal Banjir Barat mulai dikembangkan pemerintah Kota Semarang. Namun, sampai saat ini Kanal Banjir Barat hanya difungsikan sebagai sungai pengendali banjir, sehingga fungsi pariwisatanya belum optimal seperti objek wisata lain di Kota Semarang. Tujuan dari penelitian ini adalah untuk mengembangkan transportasi wisata air, khususnya di Kanal Banjir Barat. Penelitian ini menggunakan metode deskriptif dengan kuesioner dan observasi lapangan. Metode kuantitatif penentuan alur pelayaran menggunakan analisis hidrologi dan simulasi hidrolika sungai dengan program HEC-RAS. Penelitian ini merekomendasikan bahwa lokasi pengembangan transportasi untuk wisata air di Kanal Banjir Barat akan efektif jika berada diantara Bendung Simongan hingga muara Kanal Banjir Barat. Tipe angkutan wisata yang ideal adalah menggunakan 2 kapal speedboat terbuka dengan dimensi panjang 8 m, lebar 2,2 m, dan draft 0,4 m. Biaya Operasional Kapal per tahun untuk 8 trip per hari dan biaya pengelolaannya adalah sebesar Rp 901,2 juta dengan estimasi tarif per orang sebesar untuk Rp 17.070,- per trip. [Title: River Transportation Development of Semarang City for Water Tourism: A Case Study West Flood Canal] Tourism development of Semarang city is identified by the facilities of free shuttle bus. The shuttle bus service passes through Pekunden culinary route, a central souvenir of Pandanaran, Lawang Sewu and Old City of Semarang. Since 2012, local government has developed riverside tourism object of the West Flood Canal Semarang. However, until then the West Flood Canal only was functioned as flood control. Thus, the tourism function is not optimum as other tourism attractions in Semarang city. This research aims to develop the water tourism transportation, especially in the West Flood Canal. This research uses a descriptive method by questionnaires and field observations. Quantitative methods of determining ship channel using hydrological analysis and simulation of river hydraulics with HEC-RAS program. This study recommends that the location of the development of transportation of water tourism in the West Flood Canal would be effective if it is located in between the estuary of Simongan weir to the West Flood Canal. The ideal type of transport mode uses two open speedboats with dimensions of 8 m length, 2.2 m width, and a draft of 0.4 m. Ship Operating Costs per year for eight trips per day and its management fee is Rp 901.2 million with the estimated fare per person about USD 17.070, - per trip.

KAJIAN KARAKTERISTIK DAS TUNTANG DAN MODEL PENGELOLAAN DAS TERPADU Sriyana, Sriyana
TEKNIK Volume 32, Nomor 3, Tahun 2011
Publisher : Diponegoro University

A low carrying capacity of drainage basin or watershed may cause several problems, where floods occur inrainy season and droughts occur in dry season, also the occurrence of erosion, sedimentation and so on, hasbeen governmentâ€™s problem in watershed management all along. In order to anticipate this condition,characteristic data of a watershed are required, so that it can be used as basic reference of watershedmanagement.The purpose of this paper is to conduct a study on the characteristics of Tuntang watershed of Central JavaProvince and watershed management model.The method of approach uses aspects of watershed geomorphology such as the shape of watershed, elongationratio and circularity ratio approaches, order of river using Strahle method, watershed density using Lynsleyformula, and river gradient calculated based on the comparison between elevation difference and length of mainrivers.Results show that magnitude index of Tuntang Sub watershed has elongated shape with Rc value between 0.27 to0.46, which means that the longer concentration time needed, the lower flood fluctuation. And relatively roundedshape with Rc value between 0.57 to 1.00, which means that the shorter concentration time needed, the higherflood fluctuation occurs. Sub watershed order range from 4 to 6 order, which means that river basins have floodwater level increase (moderately quick to fast), likewise water level decrease. Level slope between 0 - 8 % (lowflow velocity) with an area of 117605.56 Ha, and very steep slope > 40 % (very high flow velocity) with an areaof 4219.09 Ha. The highest drainage density occurs in Sub watershed of Tuntang downstream 1.88 Km / KmÂ²,and lowest Sub watershed of Blorong 1.01 Km / KmÂ². Based on both magnitudes, the water being stored is inmedium category and floods and droughts occur. The flow pattern has the shape of rectangular dendritic anddendritic medium, showing that soil characteristics is limestone and shale. To obtain optimal performance resultof Tuntang watershed, integrated watershed management program is needed in watershed managementintegration by involving various associated parties.

BEBERAPA ASPEK PELAKSANAAN 'UNDERPINNING' Dwi Atmanto, Indrastono
TEKNIK Volume 33, Nomor 1, Tahun 2012
Publisher : Diponegoro University

In areas of dense buildings often found limitations of the land, resulting in the possibility that new buildingfoundation coincides or lies below the existing foundation and excavation leads to instability of the existingfoundation. Similar problem also encountered in the construction of underground infrastructure and old buildingrestoration where the existing foundation must be strengthened. A row of bored pile or diaphragm wall arecommonly used for securing of excavation. Alternatively it is more economical to do underpinning by means ofgrouting, soil nailing and micropile, in which each method has its own advantages and disadvantages. Thesystem of underpinning provides advantages over the diaphragm wall and bored pile because it can support theload directly and saves space. This paper aims to introduce the principles of design, implementation, anticipatedactions and legal aspects of underpinning.

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).

FAKTOR PEMBENTUK PERSEPSI RUANG KOMUNAL DI PEMUKIMAN NELAYAN (Studi Kasus: Pemukiman Nelayan Tambak Mulyo Semarang) Firmandhani, Satriya Wahyu; Setioko, Bambang; Setyowati, Erni
TEKNIK Volume 34, Nomor 2, Tahun 2013
Publisher : Diponegoro University

In certain settlement, human always interact with the physical setting arround of them. That interaction causesperception inside of that human, because perception is the process of organizing and interpretating of stimulusprovided by the environment (Rita, 1983). So the perception is strongly influenced by the individual human andphysical surroundings. Based on the theory of perception, found problems in Tambak Mulyo as fishermensettlement in Semarang, where the inhabitants of Tambak Mulyo do the communal activities on the roadenvironment. Road environment should be a mode of land transport circulation is also used for the communalspace. Seeing this phenomenon, it can be concluded that there is the perception of communal space in thefishermen settlement in Tambak Mulyo. And this study aimed to explore the factors forming the perception ofcommunal space.In answering the research objectives, the research paradigm used is a quantitative rationalistic to constructfactor variables. In constructing the factor variabless, based on the theory that the perception of the individualand the setting up of the physical environment (Sarlito, 1992). So that the required variables are perceptionvariables and variables of communal space. The variables is operationalized into a questionnaire that is easy tounderstand the respondents, next after the questionnaire data collected, the data were analyzed using factoranalysis statistical test, so of many variable factors that could wake is reduced to just a few factors thatsignificantly causes the perception of communal space in the fishermen settlement.At the output of this research, revealed about the causal factors of the perception of communal space in thefishermen settlement. These factors is a collection of variable factors that have a strong correlation in theanalysis. By knowing the factors forming the perception of communal space in the fishing settlement, expected toprovide input in the planning and design of fishing settlements.Key words : Perception, Communal Space, Physical Setting

Peningkatan Kuat Tekan dan Kuat Lentur Beton Dengan Variasi Penambahan Serat Daun Nanas Yanti, Gusneli; Zainuri, Z.; Megasari, Shanti Wahyuni
TEKNIK Vol 40, No. 1 (2019): Mei 2019
Publisher : Diponegoro University

Concrete is a building material that is widely used, because this material is strong against the press, can be easily formed to suit the needs. In the other side, has a weakness against bending and has brittle properties, so that a method is needed to correct this weakness. One effort to increase the tensile strength of concrete is done by adding fiber so that it becomes a composite material, namely concrete and fiber. This research aims to improve compressive strength and flexural concrete by adding fiber with variations of 0%, 1%, 3%, 5%, and 7% on the weight of cement on the concrete quality of K-225. The concrete design uses the Department of Environment (DOE) method, with cylinder molds with a size of 150 mm x 300 mm. The number of samples in each variation were 3 specimens and a total sample of 30 specimens. Testing results show that the highest compressive strength and flexural strength in mixed variations with an additional pineapple leaf fiber of 5% with an average compressive strength of 267.00 kg / cm2 and average flexural strength of 41.61 kg / cm2.

PENGGUNAAN ABU SEKAM PADI SEBAGAI ADSORBEN DALAM PENGOLAHAN AIR LIMBAH YANG MENGANDUNG LOGAM Cu Hadiwidodo, Mochtar
TEKNIK Volume 29, Nomor 1, Tahun 2008
Publisher : Diponegoro University

The industrial development have been increased together with the increasement of the society need. Theindustrial development will produce another product in the shape of dump that will be throw away to theenvironment. One of the industrial dump was the industrial dump from the copper industry that containshard metal copper (Cu). One of the way to manufacture dump is with the adsorption process of the riceplant dust husk. This research has the aim to know the adsorption ability of the rice plant dust husk indecreasing the concentration of Cu metal in the artificial water dump and it was done with batch processand continuous. The batch experiment use 10, 20, 30 gram adsorben for each media size variation 10-30mesh and 30-50 mesh. Has the highest decreasing efficiency in the weight of 30 gram (30-50 mesh) that is52,81%-87,80%. In the continuous experiment, it was done in the column with 2 inch diameter and with222 ml/menit debit. The result was the highest decreasing efficiency until 94,98%-97,10%. Speed constanvalues (k1) 0,00743-0,0160 ml/mg.second with adsorp capacity(q0) 0,7734-1,3376 mg/g.

DESIGN EKONOMIS UNTUK PROPELLER KAPAL Hartono, Hartono
TEKNIK Volume 29, Nomor 3, Tahun 2008
Publisher : Diponegoro University

Increase of the price of world oil pushs liner to conduct action is economic from every operational unit in itâ€™sship armada. One other most dominant in usage of fuel is Main engine is working to turn around propeller asship actuator. On that account ship owner wants design propeller which is economic for itâ€™s ship to canreduce usage of fuel of 20% when sailing.

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