TEKNIK
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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<![CDATA[PERENCANAAN KAPASITAS PEMBANGKIT PLTM SUNGAI LOGUNG KARANGTALUN KABUPATEN TEMANGGUNG ]]>
<![CDATA[Nugroho, Agung]]>
<![CDATA[ TEKNIK Volume 34, Nomor 3, Tahun 2013 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v34i3.6721
<![CDATA[Central Java Province intends to improve the use of renewable energy (EBT) such as water resources. Logung river at Ngaliyan subdistrict, Temanggung district has potential energy for micro power plan. The first step to use the water resource is determining the capacity of a mini hydro power plan in accordance with the conditions of the river Logung. Based on the the technical study, the elvation height between the prospective weir with potential power house is 110 m and the effetive height at 105 m. Logung maximum river flow is 11.06 m3/dt, with average flow is 4,77 m3/dt., The minimum flow is 0,75 m3/dt. This electricity power is 10253.12 KW with maximum flow, it will be produced 4848.44 KW at maximum flow 60 %. The minimum flow can deliver 695,28 KW. The suitable capacity for the generator of micro power plants of Logung is 3220 KVA when it is according to manufacture. Key words : power, flow, power]]>
<![CDATA[Studi Laboratorium Pembuatan Demulsifier dari Minyak Kelapa dan Lemon untuk Minyak Kelapa dan Lemon untuk Minyak Bumi pada Lapangan x di Provinsi Riau ]]>
<![CDATA[Erfando, Tomi]]>;
<![CDATA[Khalid, Idham]]>;
<![CDATA[Safitri, Retno]]>
<![CDATA[ TEKNIK Vol 40, No. 2 (2019): Agustus 2019 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v39i3.23656
<![CDATA[Demulsifier digunakan untuk mengatasi masalah emulsi minyak mentah pada saat produksi. Artikel ini memuat uji laboratorium demulsifier lokal dari minyak kelapa dan lemon dibandingkan demulsifier komersil. Parameter yang diperiksa adalah nilai pemisahan emulsi, pengaruh parameter pengujian terhadap pemisahan air secara statistik, dan water quality hasil demulsifikasi dengan uji TDS (Total Dissolved Solid) dan pH. Penelitian ini menggunakan metode saponifikasi dalam pembuatan demulsifier dan pengujian demulsifier menggunakan metode bottle test. Variasi temperatur adalah 400C, 500, 600C, 700C, dan 800C dengan konsentrasi 1ml, 3ml, dan 5 ml. Hasil penelitian menunjukkan bahwa demulsifier lokal mampu memecah emulsi di seluruh temperatur pengujian. Pemisahan tertinggi terjadi pada temperatur 600C,700C, dan 800C dengan konsentrasi  optimal 3ml dan 5 ml dan hasil pemisahan sebesar 32 ml dan 33 ml. Di sisi lain demulsifier komersil pada temperatur 400C dan konsentrasi 5ml gagal memecah emulsi. Pengaruh temperatur dan konsentrasi terhadap pemisahan air secara berurut sebesar 42,5 % dan 2,7%. Water quality yang baik hasil demulsifikasi terjadi pada pengujian sampel demulsifier lokal 2 dengan TDS 244 ppm dan pH 6,99.]]>
<![CDATA[STUDI PENURUNAN MUKA TANAH (LAND SUBSIDENCE) MENGGUNAKAN METODE PERMANENT SCATTERER INTERFEROMETRIC SYNTHETIC APERTURE RADAR (PS-INSAR) DI KAWASAN KOTA CIMAHI - JAWA BARAT ]]>
<![CDATA[Prasetyo, Yudo]]>;
<![CDATA[Subiyanto, Sawitri]]>
<![CDATA[ TEKNIK Vol 35, No 2 (2014): (Desember 2014) ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v35i2.7184
<![CDATA[Proses atau pergerakan penurunan muka tanah telah banyak terjadi di berbagai wilayah di seluruh dunia khususnya kota-kota besar. Dampak dari penurunan muka tanah adalah kerusakan infrastruktur wilayah pemukiman dan gangguan terhadap stabilitas ekonomi dan kehidupan sosial di wilayah tersebut. Oleh sebab itu, kita memerlukan sistem mitigasi bencana alam yang memiliki kemampuan menyajikan analisis kebumian secara cepat dan optimal dalam konsep kajian cepat. Teknologi penginderaan jauh memiliki kemampuan untuk meliput area pengamatan yang luas dalam waktu singkat serta terkait dengan tipikal iklim di Indonesia yang terletak di area tropis (intensitas dan sebaran tutupan awan yang tinggi). Pemilihan teknologi radar adalah salah satu solusi yang baik untuk pemetaan spasial pada estimasi penurunan muka tanah. PS-InSAR adalah metode terbaru dari pemrosesan citra RADAR dimana memberikan akurasi yang baik dan meminimalkan efek dekorelasi. Metode PS-InSAR diterapkan pada wilayah Indonesia merupakan solusi yang tepat karena kemampuannya menembus ketebalan awan dan kabut tebal. Metode ini digunakan dalam analisis penurunan muka tanah pada kota Cimahi-Propinsi Jawa Barat diman hasilnya 17.97 mm/yr ± 11.5 mm/yr. Kecamatan Cimahi Utara memiliki kecepatan penurunan muka tanah tertinggi sebesar 22.9 mm/yr ± 12,7 mm/yr. Metode ini terbukti sebagai salah satu metode penginderaan jauh yang baik untuk meneliti pergerakan penurunan muka tanah.[Land Subsidence Study Using Permanent Scatterer Interferometric Synthetic Aperture Radar (PSINSAR) Method in Cimahi City Area-West Java] Process or movement of land subsidence has a lot going on in various regions of the world especially in big cities. The impact of land subsidence can damage urban infrastructure and a disruption to the economic stability and social life in the region. Because of it, we need a natural disaster mitigation system that is able to provide rapid and optimal a geoscience analysis in the concept of quick assessment. A remote sensing technology has the ability to assess large areas in a short time and related with the typical climate of Indonesia that lies in a tropical area (intensity and extensive high cloud cover). Selection of radar technology is one solution that is good for spatial mapping in land subsidence estimation. PS-InSAR is the newest method in RADAR image satellite processing which is give a good accuracy and minimize decorellation effects. PS-InSAR method implementation in Indonesia area is a good solution because this method can penetrate heavy dense clouds and fogs. This method was used in land subsidence analysis at Cimahi City-West Java Province which is result arounds 17.97 mm/yr ± 11.5 mm/yr. The South Cimahi District has a highest land subsidence rate arounds 22.9 mm/yr ± 12,7 mm/yr. This method has been proven as one of a good remote sensing method to investigate land subsidence movement.Copyright (c) 2014 by Fakultas Teknik, Undip. All right reserved.]]>
<![CDATA[TANTANGAN SISTEM KOMUNIKASI LAUT DI INDONESIA SEBAGAI FAKTOR PENDUKUNG KESELAMATAN PELAYARAN ]]>
<![CDATA[Windyandari, Aulia]]>
<![CDATA[ TEKNIK Volume 32, Nomor 1, Tahun 2011 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v32i1.1680
<![CDATA[Shipping safety topics lately skyrocketed in the surface and became a hot news, both print and electronic media,along with marine accidents which occurred in late 2006 and early 2007. The role of shipping safety in marinetransportation system is essential for this type of transport is reflected as full-tinged danger and threat of storms,fog, and the movements of the sea as waves, currents, sea corals, sedimentation and cruise lines are fixed andchanged. That’s why our shipping have very high risk, and therefore the safety aspects must be absolutelyguaranteed.Therefore necessary communication equipment that support the safety of the ship sailing. Due to sophisticatedcommunications equipment on board, will reduce the number of ship accidents and casualties in the case ofaccident in shipping.]]>
<![CDATA[SURVEI TOPOGRAFI UNTUK MENENTUKAN GARIS TAMPAK PANDANG BASE TRANSCEIVER STATION (BTS) ]]>
<![CDATA[Laila Nugraha, Arief]]>;
<![CDATA[Sudarsono, Bambang]]>
<![CDATA[ TEKNIK Volume 28, Nomor 1, Tahun 2007 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v28i1.2029
<![CDATA[Base Transceiver Station (BTS) representation one of appliance of supporter of telecommunicationsnetwork. The development of BTS have to each other in circuit by other BTS or which have been planned.The situation BTS in circuit between other BTS without obstacle are called Line of Sight (LoS). Thetopographic survey is method of survey work to make sure the Line of Sight BTS. The topographic surveyconsist of GPS survey and study map for determination of high of BTS antenna and the Line of Sight ofBTS can be made.]]>
<![CDATA[Pembuatan Digital Terrain Model (DTM) dari Light Detection and Ranging (LiDAR) menggunakan Metode Morfologi Sederhana ]]>
<![CDATA[Safi'i, Ayu Nur]]>;
<![CDATA[Hartanto, Prayudha]]>
<![CDATA[ TEKNIK Vol 40, No. 1 (2019): Mei 2019 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v40i1.23004
<![CDATA[The production of Indonesian Topographic Map (RBI) in the scale of 1:5000 takes a long time, especially in the making of contour layer. Contour layer can be extracted from both Aerial Photogrammetry and LiDAR data. Nowadays, LiDAR technology is getting more reliable for DSM. From DSM can be exctracted to get DTM/DEM. DTM/ DEM generation because of its shorter processing time  and  relatively low  cost.  The  filtering  method used  in  this  research  is  Simple Morphological Filtering (SMRF) which input parameters are: cell size, slope, windows, elevation threshold and scaling factor. Average value of Cohen’s kappa is in the range of 0.4-07 which means that the generated DTM is good. Because of the existence of null values in the generated DTM, the smoothing filters have been applied. The extracted DTM then be compared to in situ data. The RMSE ranged from 0,621 to 0,930 m and LE90 about 1,025-1,605. Those RMSE and LE90 values satisfied the vertical accuracy of the 1: 5000 topographic map and graded as the second and third class in accordance to BIG Regulation No.6 of 2018 as revision of Perka BIG No.15 of 2014 focusing on Technical guidelines for Basic Map Accuracy.]]>
<![CDATA[ANALISA FROUDE NUMBER EKONOMIS PADA KAPAL WISATA DI WADUK JATILUHUR DENGAN PENDEKATAN COMPUTATIONAL FLUID DYNAMIC (STUDI KASUS KM. JASATIRTA) ]]>
<![CDATA[Samuel, Samuel]]>;
<![CDATA[Manik, Parlindungan]]>
<![CDATA[ TEKNIK Volume 32, Nomor 3, Tahun 2011 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v32i3.1741
<![CDATA[Model catamarans increasingly popular as a means of transportation of goods and people that needdevelopment to find out more in the interaction prisoners on the ship hull in order to achieve stability and betterresistance. KM Jasatirta is one of ship model catamaran (double hull) which is designed to support tourism inJatiluhur Reservoir. This study aims to find out more details interaction of the total prisoners in the ship's hullKM Jasatirta with Computational Fluid Dynamics approach.Research carried out several stages of manufacture of the Computational Fluid Dynamic model, simulationinput data, running simulations to converge, then analyzes the results of calculations by the methodSlenderBody, Delft Series, 98, and CFD. Analysis of the calculation includes the analysis of resistance, FroudeNumber economic , and comparative analysis of numerical calculation by the method of Computational FluidDynamics.The results of the analysis and calculation of reseach showed that the total ship resistance (Rt) at 2 knots boatspeed by using the CFD method at 0.37 kN, Delft method Series'98 of 0.14 kN, while the calculation method forSlender Body 0.04 kN and a analityc calculation by the method of Millward's of 0215 kN. And based on theresults of analysis of Froude number of the most economical in terms of aspects of the ship's speed is the methodof Computational Fluid Dynamics with a value of 0094 sedangan Fn projection calculation with a quadraticfunction then the value of accurate Fn Series'98 Delft method so it can be used as a reference calculation.]]>
<![CDATA[MODEL DEFORMASI GETAS DI ZONA SESAR KALIGARANG (KGFZ) SEMARANG: STUDI AWAL PENGAMATAN MIKROSTRUKTUR MENGGUNAKAN METODE PETROGRAFI ]]>
<![CDATA[Fahrudin, Fahrudin]]>;
<![CDATA[Winarno, Tri]]>
<![CDATA[ TEKNIK Volume 33, Nomor 1, Tahun 2012 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v33i1.3787
<![CDATA[Brittle deformation at Kaligarang fault zone result strain changes. That strain is microstructure.Microstructures can see closely petrography. That observation include grain form, microcrack can form atcontact point like Hertzian and diagonal intragranular microcracks. Grain forms over angular, straight, andconcoidal. Grain of crystal or lithic fragments floating at matrik or cements. Microcrack growth does not onlydepend on stress, but also on temperature and chemical environment, especially of the fluid in the crack.]]>
<![CDATA[IKON KOTA SEMARANG ]]>
<![CDATA[Ediati, Murni]]>
<![CDATA[ TEKNIK Volume 30, Nomor 1, Tahun 2009 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v30i1.1820
<![CDATA[As we know that our forefather’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 it’s dealing with the Indonesian law, regulation and thegovernment’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 ‘lost’ and it has been uncountable how many of them were lost because of the economic andpolitical reason.The City of Semarang’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 ‘the mute witness’ of our city’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.]]>
<![CDATA[STUDI OZONISASI SENYAWA ORGANIK AIR LINDI TEMPAT PEMROSESAN AKHIR SARIMUKTI ]]>
<![CDATA[Rezagama, Arya]]>
<![CDATA[ TEKNIK Volume 34, Nomor 2, Tahun 2013 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
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DOI: 10.14710/teknik.v34i2.5630
<![CDATA[Existing treatment leachate from Sarimukti Landfill doesn’t meet the quality standards of waste water.Preliminary treatment is necessary to break down persistent leachate compounds. Ozone can act directly orindirectly with organic material (Glaze 1986). Column batch reactor system use one liter volume. Ozone ispumped into the leachate in the form of fine bubbles. Variations include Ozone Pumping Flow, Ratio ofhigh/diameter (t/d), and pH. Kinetic Reaction of oxygen dissolution in the average leachate is zero order.Increased pumping air discharge and increased pH makes ozone transfer process better. Best value occurs at pH11, where the value of the reaction rate constant ozone 1.48. The average percentage of organic materialallowance 31% COD and 26% TOC. The decline TOC and COD have a tendency to be influenced by the pHoptimum 8-9. At alkaline pH makes carbonate (CO3) formed the greater, that make ozone compounds killquickly. FTIR results showed the intensity of hydroxyl groups increased after ozone oxidation where thesubstitution of functional groups of organic matter associated with electrophilic addition reaction of oxygenatoms. Existence Fulfic acid also increased the effect compounds and Humic Acid, Humad large has been cut byradicals.]]>
