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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.

Arjuna Subject : -

Articles 522 Documents

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Analisis Viskositas Slurry Propelan Untuk Akurasi Karakterisasi Rheologi Berbasis Perekat Hidroxy Terminated Polybutadiene Dengan Plasticizer Dioctyl Adipate Ardianingsih, Retno; Kumoro, Andri Cahyo
TEKNIK Vol 40, No. 3 (2019): Desember 2019
Publisher : Diponegoro University

Analisis rheologi perlu dilakukan terhadap slurry propelan untuk mengetahui viskositas dan castability-nya. Hal ini berpengaruh pada tingkat homogenitas dan nilai Isp sebagai karakteristik utama propelan padat komposit. Penelitian ini bertujuan untuk mengetahui karakteristik rheologi slurry propelan berbasis HTPB dan DOA menggunakan analisis viskositas.Â Metode pengukuran viskositas dilakukan dengan parameter suhu, waktu curing dan shear rate. Hasil pengukuran menunjukkan bahwa viskositas menurun dengan kenaikan suhu dan juga sebaliknya, viskositas meningkat dengan bertambahnya waktu curing. Melalui persamaan Power Law, diperoleh Koefisien konsistensi (K) antara 2,1148-2,2877 yang nilainya meningkat seiring dengan turunnya temperatur. Bertambahnya nilai K mengartikan energi yang dibutuhkan oleh unit operasi untuk mencetak propelan ke dalam tabung cetakan juga semakin meningkat. Sedangkan nilai indeks sifat alir (n) antara 0,1535 - 0,5128 menunjukkan bahwa slurry propelan merupakan fluida Non-Newtonian dengan perilaku shear-thinning (pseudoplastik) karena n<1

PENGOLAHAN DATA GEOLISTRIK DENGAN METODE SCHLUMBERGER Broto, Surdaryo; Sera Afifah, Rohima
TEKNIK Volume 29, Nomor 2, Tahun 2008
Publisher : Diponegoro University

Geophysics is a knowledge that concern about structural and composition in subsurface. Geophysicshas some methods to explore subsurface condition which are: seismic, gravity, geomagnetic,georesistivity, georadar and well logging. Georesistivity is one of geophysics method that focused inresistivity properties in the earth. Georesistivity has some methods which are telluric resistivity,magnetotelluric, electromagnetic, IP (Induced polarization), resistivity. Resistivity can be divided intoHorizontal Profilling (HP) and Vertical Electrical Sounding (VES). Georesistivity is used for shallowinvestigation effectively.

FAKTOR - FAKTOR PENYEBAB MUNCULNYA ACTIVITY SUPPORT DI KAWASAN RUANG PUBLIK BUNDARAN HOTEL INDONESIA JAKARTA PUSAT Mustikowati, Endah; Setioko, Bambang; Syahbana, Joesron Alie
TEKNIK Vol 36, No 2 (2015): (December 2015)
Publisher : Diponegoro University

Area Bundaran Hotel Indonesia menjadi salah satu ruang publik di mana banyak pengunjung datang untuk melakukan berbagai kegiatan. Kondisi ini menyebabkan munculnya activity support misalnya PKL, penyewa peralatan olahraga, dan beberapa hiburan jalanan. Di puncak intensitas kegiatan, activity support tersebut tersebar di beberapa tempat ini seperti di koridor utama, jalur pejalan kaki dan air plaza mancur. Melihat fenomena itu, dapat disimpulkan bahwa terdapat faktor-faktor penyebab munculnya activity support tersebut. Dalam menjawab tujuan penelitian, digunakan penelitian rasionalistik kuantitatif sebagai paradigma untuk membangun variabel faktor berdasarkan teori Activity Support dan Ruang Publik. Variabel yang dioperasionalkan dalam kuesioner dianalisis dengan menggunakan analisis faktor uji statistik. Jumlah faktor variabel yang memiliki korelasi yang kuat dalam analisis tereduksi menjadi beberapa factor yang signifikan sebagai penyebab dari munculnya activity support di ruang publik, yaitu, area pedesrian, jalan masuk, sirkulasi dan parkir, keragaman kegiatan, karakteristik ruang publik, jenis kegiatan, bentuk-makna-arti ruang publik, aksesibilitas dan visual, budaya, fungsi dan bentuk ruang publik dan area lansekap, batasan kawasan dan ciri khas dari ruang publik. [Title: The Factors Causing Appearance of Activity Support in The Public Area Around Bundaran Hotel Indonesia in Central Jakarta] Bundaran Hotel Indonesia area becomes one of public space where many of people have coming to do some activities here. This condition causes the occurrences of activity support for instance the street vendors, sport equipments tenants, and some of street entertaintment. In the peak of intensity of activities, the activity supports crowded around this area such as in the main corridor, pedestrian pathways and fountain plaza. Seeing those phenomena, it could be concluded that there are causal factors of the occurrences of the activity support. In answering the research objectives, this research applied quantitative rationalistic research as paradigm to construct factor variables based on theories of Activity Support and Public Space. The variables operationalized into a questionnaire were analyzed using factor analysis statistical test. The number of factors that have a strong correlation in the analysis is reduced into the causal factors of the occurrences of activity support in the public space, such as: pedesrian area, entrance ways, sirculation and parking, diversity of activities, characteristics of public sace, type of activities, form- meaning-significance of public space, accesibility and visual, culture, function and form of public space and landscape area, border area and the hallmark of public space.

PENGENALAN TEKNOLOGI RADAR UNTUK PEMETAAN SPASIAL DI KAWASAN TROPIS Haniah, Haniah; Prasetyo, Yudo
TEKNIK Volume 32, Nomor 2, Tahun 2011
Publisher : Diponegoro University

For tropical areas that often cloudy and experiencing rain, sensors based on optical satellite remote sensingoften encounter difficulties. This sensor is not able to optimally imaged region of interest due to clouds and rainobscured. Instead of wave-based sensor that uses microwave active sensors such as Radio Detection andRanging (RADAR) has advantages capable mencitra in various weather conditions, day and night, includingcoverage through the thick clouds and rain. Therefore, the radar system can help assess the level of physical andnon physical damage a wider area in quick time so that the scale of regional management priorities can bedetermined effectively and efficiently. Ability of SAR to penetrate clouds, covering the surface of the earth withtheir own signals, and can accurately measure distances, making the SAR is used for various applications, suchas: Monitoring of ice at sea, cartography, surface deformation detection, monitoring of glaciers, food cropproduction forecasting, mapping forest, ocean wave spectral, city planning, monitoring, disaster monitoring andshoreline

PEMBUATAN BIODIESEL DARI MINYAK GORENG BEKAS DENGAN PROSES CATALYTIC CRACKING Buchori, Luqman; Widayat, Widayat
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Crude oil is a source of energy which is not be renewable. This fact motivates so much countries ineconomizing on fuel. Many researches have been done to gets another fuel substitute the crude oil.Biodiesel is represented as fuel instead of diesel fuel, and it is produced from vegetable oil. In the otherside, ex-cooking oil is waste-product from food industry, restaurant and household which is potential tobe alternative fuels because of the high contents of carbon and hydrogen atoms. Commonly the biodieselmade from vegetable oil by esterification and transesterification process. But if using esterification andtransesterification process to ex-cooking oil material, it is not economically feasible because the processmakes another reaction between alkaly catalist and oil to produce soap. One of biodiesel process iscatalytic cracking of the ex-cooking oil. This research is aimed to analyze zeolite catalist size effect(0.125mm; 0.3375mm; 0.425mm; 0.85mm; 1.18mm), and acid concentration on the product (2N; 3N;4N). This result shows that at 4N acid concentration and 0.125 mm zeolite catalist size is optimal whichcan reach diesel specification.

Kecepatan Putaran Poros Pada Mesin Pembuat Pakan Pelet Berpenggerak Kayuh Sepeda Nugroho, Adi; Wibowonoto, Arif
TEKNIK Vol 38, No 1 (2017): (Juli 2017)
Publisher : Diponegoro University

The background of this study is the human power inconsistensy to run the simple pellets machine spinner. One of the efforts is to use bicycle sprocket to transmit the power until it reaches the expected speed. The exact size of spocket is needed to gain the wanted speed which will be obtained through the speed rotation test on various size of spocket. Data collecting methode that are used on this study are literature study and observation. While data analysis is using parametric analysis technique and the measurement parameter variables are spocket size and axis spin speed (rpm). This research aims to determine the exact size of sprocket in order to reach 626 rpm. As it result is required 54 rpm at Nâ‚‚ (18 T), 63 rpm at Nâ‚‚ (21 T), and 72 rpm at Nâ‚‚ (24 T) to reach 626 rpm. And the size of spockets are Nâ‚ (34 T), Nâ‚‚ (18 T, 21 T, 24 T), Nâ‚ƒ (42 T), Nâ‚„ (11T), Nâ‚… (24 T) and Nâ‚† (15 T).

ANALISA KINERJA KEMUDI KAPAL â€œMV SIRENAâ€œ PADA PELAYARAN PERCOBAAN KAPAL BARU Utomo, Budi
TEKNIK Volume 31, Nomor 2, Tahun 2010
Publisher : Diponegoro University

Every ship building to the after constructed should be done sea trial, it is intended to find out all machinery andequipment in the ship to run well and deserve to normal weather conditions in accordance with the plan. Themain purpose of this study is to know the performance of steering ship MV. SIRENA in sea trial on new ship,because in the operation of a vessel, the steering has a very important role is to ship control or shipmanouvering. After doing sea trial produced several motion graphics board. To ship left spinning PS tacticaldiameter DT = 114,4120 meter and advance = 157,3716 meter, while rotating to the right to ship SB tacticaldiameter DT = 120,9048 meter and advance = 161,9024 meter. There is a difference of 120,9048 â€“ 114,4120 =6,4928 meter in tactical diameter for PS, and 161, 9024 - 157, 3716 = 4,5308 meter in advance, which meansthat the ship sailed round the larger right and left to right, this is due to spin the propeller rotation is right theship sailed toward him continue in the direction of nuts bolts, steering performance of the experimental results ofthe MV. SIRENA after the sea trial, then matched with the demand for ship owners and ship classificationagency, the steering performance of the new ship MV SIRENA can run well which means it can be accepte,because The resulting DT = 6,4928 meter still within the recommended limit is within their rules that is DT =3,45 - 7,50 meter.

OPTIMALISASI SISTEM PENGELOLAAN SAMPAH DI LINGKUNGAN KAMPUS UNIVERSITAS DIPONEGORO: UPAYA MENUJU UNDIP ECO-CAMPUS Wiharyanto, Oktiawan; Titik, Istirokhatun; Nur, Fajar S. S
TEKNIK Volume 33, Nomor 2, Tahun 2012
Publisher : Diponegoro University

Diponegoro University as a leading institution of higher education in Central Java is expected to be a pioneerand an example in terms of waste management. But in fact now has Undip not have an adequate system of wastemanagement. Current conditions almost all existing studies program has been concentrated in the campus areaTembalang still treats conventional waste by dumping it in the trash is mixed with and without prior sortingwhich will eventually increase the weight of the existing TPS and TPA. This makes the system of wastemanagement in the UNDIP really need to be evaluated and reviewed. This study dimaksudakan to optimizewaste management system with the principles of the 3R (reuse, reduce, recycle) in order to minimize the wasteproblem. Besides this optimization also as an effort to realize the vision of the university Undip asenvironmentally friendly (eco-campus) and a role model for waste management agencies and other institutions

Analisa Faktor Pembentuk Karakteristik Sebaran Sarana dan Prasararana Permukiman Di Wilayah Perbatasan (Studi Kasus : Kelurahan Sendang Mulyo Kota Semarang) olivia, deasy; Setioko, Bambang; Pandelaki, Edward Endrianto
TEKNIK Vol 39, No. 2 (2018): Desember 2018
Publisher : Diponegoro University

The urban development occurs through a process of sustainable urbanization. This process cause urban sprawl that spread until the outer part of the city known as the border area. Urban Sprawl encourage the growth of new sub-service facilities, especially in the border area of Semarang city. Sendang Mulyo village is a settlement that located in the border area of Semarang city and Demak region. Sendang Mulyo village has better urban infrastructure than the settlement in Demak. These conditions cause urban infrastructure serve not only the residents itself but also those who live outside of Semarang city. These phenomena is shape the urban infrastructure spreading characteristics in the border area. This article presents research in analysing 15 shaping factors of urban infrastructure spreading characteristics in the border area, in this case Sendang Mulyo Settlements Semarang City. Based on the results of this research which was conducted through positivistic paradigm and quantitative approach shows that the urban infrastructure spreading characteristics in the border area of Semarang city influenced by human aspect of the behaviour setting

PENJEJAK OBJEK DENGAN BEBERAPA KAMERA MENGGUNAKAN ALGORITMA THREE STEP SEARCH Sofwan, Aghus
TEKNIK Volume 30, Nomor 3, Tahun 2009
Publisher : Diponegoro University

In this paper we address the development of an object tracking system with multiple fixed cameras usingmotion estimation. Three step search algorithm is used to estimate object movement that across camera. Thisalgorithm will process two frame f(t-1) and f(t), where f(t-1) represents reference image, and f(t) representscurrent image at one camera to produce motion vectors value. Sequence of images that arrive from cameraswill be analyzed, then motion vectors and number of moving blocks are obtained. The motion vectors implythat object is moving to right, left, up, or down. Multiple cameras are placed as nodes in a map area havingcardinal coordinate. View direction of each camera according cardinal coordinate is whether south, east,north, or west. Based on motion vectors value and number of blocks that are moving from each camera, ouralgorithm will respond by moving the view from one camera to another, tracking objects that cross the areacovered by cameras.

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