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.
Articles
518 Documents
<![CDATA[Mitigasi Bencana Banjir dengan Sistem Informasi Monitoring dan Peringatan Dini Bencana menggunakan Microcontroller Arduino Berbasis IoT ]]>
<![CDATA[Danang, Danang]]>;
<![CDATA[Suwardi, Suwardi]]>;
<![CDATA[Hidayat, Ihsan Ardi]]>
<![CDATA[ TEKNIK Vol 40, No. 1 (2019): Mei 2019 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (2990.067 KB)
|
DOI: 10.14710/teknik.v40i1.23342
<![CDATA[The current system for mitigating floods is the doorman checking the water level in the water meter installed at the dam. When it rains very hard or other causes that might affect the flood, the doorman conveys information using the manual way by hitting kentongan to alert the surrounding community because the water level has the potential to cause flooding. This article presents the research aimed at flood disaster mitigation by building a monitoring and flood disaster early warning information system using an Internet of Things based Arduino microcontroller. A water level sensor installed at the river water gate is connected to an Arduino Uno device equipped with an SMS Gateway SIM900A. This system monitors the water level and sends information to the Kedungjati SAR Team and Ketua RT of the surrounding community around the river water gate when the water level approaches the upper limit of the flood disaster. IoT technology in this study is used to store river water level data and turn on the siren as flood warning signs when the data received reaches the flood alert level.]]>
<![CDATA[PEMANFAATAN KREDIT MIKRO PERUMAHAN BAGI MASYARAKAT BERPENGHASILAN RENDAH DI BMT MITRA KHASANAH KOTA SEMARANG ]]>
<![CDATA[Esariti, Landung]]>;
<![CDATA[Nirwanto, Anang]]>
<![CDATA[ TEKNIK Volume 29, Nomor 1, Tahun 2008 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (845.131 KB)
|
DOI: 10.14710/teknik.v29i1.1911
<![CDATA[Since 2006, government has started to launch the housing micro finance system for low incomehousehold, and has been implemented in Jakarta, Semarang, Solo and other big cities. In Semarang, thehousing micro finance is used for early home construction and home renovation. This research is todefine the contribution between two implementation of housing micro finance and BMT Mitra Khasanahis selected as a case study. This investigation used the triangulation method, and is supported with theusing of dicriminant technique analysis, scoring and frequency distribution. About 17 respondent areinterviewed, and they have been facilitated by BMT Mitra Khasanah.The research reveals that 83% of housing micro finance application in Genuk is for home renovation,while 17% is for early home construction. There are 3 dominant factors influenced the applicatio;,namely the economy, installment ability and home condition. The results shows that the applicationwould be very useful if there have been an initation to facilitate the low income household in technicaland managerial assistance.]]>
<![CDATA[INVESTIGASI NON DESTRUKTIF DENGAN PROFOMETER ]]>
<![CDATA[Hariwarsianto, Hariwarsianto]]>;
<![CDATA[Narayudha, Moga]]>
<![CDATA[ TEKNIK Volume 29, Nomor 3, Tahun 2008 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (683.815 KB)
|
DOI: 10.14710/teknik.v29i3.1963
<![CDATA[Concrete structures obtain their strength and load carrying capacity from the compatibility of concrete’scompression capacity and steel’s tensile strength. When a structure is in service, the concretecompression strength can easily be measured with all kinds of equipment, both non destructive, semi anddestructive.While the methods of analysis concrete in existing buildings is fairly straight forward and widely known,the determination of reinforcement embedded in the concrete is a more complicated matter. Beside thesteel’s tensile strength, the bar’s configuration is very important, since the load carrying capacity isdepending on it. One destructive method is to un-mantle the bars and observes and measures the sizesand configuration manually. This will involve not only skilled labor but is time consuming and costly.One technology to overcome these difficulties is the use of rebar locators. The measuring method is basedon the eddy-current principle with pulse-induction. Important data as concrete cover, bar configurationand bar size can be obtained. This paper will discuss the principles of rebar locators, and will include acase study where structural capacity is calculated based on non destructive testing]]>
<![CDATA[KEBUTUHAN FASILITAS PENYEBERANG JALAN DENGAN METODE GAP KRITIS (Studi Kasus Jalan Raya Semarang – Kendal Km. 16.50) ]]>
<![CDATA[Wicaksono, Y.I.]]>;
<![CDATA[Siswanto, Joko]]>
<![CDATA[ TEKNIK Volume 32, Nomor 2, Tahun 2011 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (231.388 KB)
|
DOI: 10.14710/teknik.v32i2.1732
<![CDATA[This study want to measure the performance of pedestrian facilities ( zebra cross), particularly the critical gapanalysis to see the level of opportunity to cross the street safely. To support the recommendations that will be setin addition to the critical gap method will be investigated also waiting time and total time to cross the street andanalysis of types of facilities based on the volume of pedestrian and vehicle volume as the raw determination ofthe crossing facility.From some discussion can be summarized that according to the study analyzes the volume of pedestrian andvehicle volumes obtained by the recommended pedestrian facilities according to standard determination of thecrossing facility is the type of pelican crossing with a separator. Based on the analysis of waiting time to crossthe street, 93% require pedestrian waiting time, with the average waiting time to cross and the total time tocross at that location, which is 56.61 seconds and 79.25 seconds. The condition is very far from the pedestrianshould not waiting more than 30 seconds.Results of analysis of critical gaps, both based on the critical gap only in the morning or combined critical gapin the morning and afternoon shows very little chance of crossing the road owned by the defector, on themorning of 7 times for critical gap in only the morning and 11 times for a combination of critical gap Total 125waders for 06.30 until 7:30 pm, and 20 times based on a critical gap only in the morning a and 29 times forcritical gap combination of pedestrian total of 66 people over at 07.30 until 08:30 pm.Thus based on the results of some analysis that has been done can be concluded that pedestrian facilities are noteffectively to use zebra cross type . The proposed type of road crossing facilities on arterial roads for thepedestrian to use a pedestrian facility type like overpass or underpass to eliminate conflicts between thevehicle flow and a pedestrian crossing.]]>
<![CDATA[LIFE CYCLE ASSESSMENT OF PAPER TOWEL AND ELECTRIC DRYER AS HAND DRYING METHOD IN THE UNIVERSITY OF MELBOURNE ]]>
<![CDATA[Hapsari Budisulistiorini, Sri]]>
<![CDATA[ TEKNIK Volume 28, Nomor 2, Tahun 2007 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (214.38 KB)
|
DOI: 10.14710/teknik.v28i2.2139
<![CDATA[Nowadays products, services, or technologies are proactively evaluated toward environmental performance byusing the life cycle assessment (LCA). The assessment cover the whole life cycle from cradle to grave hence theproduct performance can be analyzed or compared with others for product development or for making adecision. The University of Melbourne currently installed towel dispenser by means of hand drying method inthe entire campus. As some has suggested that electric dryer will provide more sustainable service than papertowel, a LCA study will be a good approach for comparing both methods. The study utilizes SimaPro softwareto generated database for impact assessment. The assessment method used in this study is Eco-Indicator 99.From the LCA study, electric hand dryer performed better in most of indicators. Electric hand dryer istherefore recommended to be used in the entire campus of the University of Melbourne]]>
<![CDATA[Identifikasi Jenis dan Karakteristik Lempung di Perbukitan Jiwo, Bayat, Klaten dan Arahannya sebagai Bahan Galian Industri ]]>
<![CDATA[Winarno, Tri]]>;
<![CDATA[Kurniasih, Anis]]>;
<![CDATA[Marin, Jenian]]>;
<![CDATA[Kusuma, Ari Istiqomah]]>
<![CDATA[ TEKNIK Vol 38, No 2 (2017): (Desember 2017) ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (278.956 KB)
|
DOI: 10.14710/teknik.v38i2.12942
<![CDATA[Perbukitan Jiwo di Bayat, Klaten, merupakan suatu inlier dari batuan Pra-Tersier dan Tersier di sekitar endapan Kuarter. Perbukitan Jiwo tersebut mempunyai kondisi geologi yang kompleks. Salah satu batuan yang menyusun Kompleks Perbukitan Jiwo adalah batuan metamorf  berupa sekis dan filit. Batuan metamorf tersebut telah mengalami pelapukan yang intensif, ditandai dengan hadirnya soil yang berwarna merah. Hasil pelapukan batuan metamorf tersebut berupa lempung yang telah dimanfaatkan oleh penduduk sekitar sebagai bahan pembuatan gerabah. Tujuan dari penelitian ini adalah untuk mengidentifikasi jenis mineral lempung di Perbukitan Jiwo dan juga karakteristik fisik dan kimia dari mineral lempung tersebut untuk melihat potensi lempung untuk bidang industri. Metode analisis yang digunakan dalam penelitian ini adalah dengan metode analisis XRD untuk mengetahui karakteristik mineralogi lempung, analisis XRF untuk mengetahui kandungan kimia lempung dan metode analisis fisik untuk mengetahui karakteristik fisik dan megaskopis lempung. Berdasarkan hasil analisis, jenis mineral lempung yang dijumpai adalah kaolinit, smektit dan serisit. Lempung tersebut dapat dimanfaatkan sebagai bahan pembuatan gerabah. Lempung tersebut tidak dapat digunakan dalam industri lain seperti farmasi, kosmetik dan kertas karena tidak memenuhi persyaratan kadar kimia]]>
<![CDATA[OPTIMASI PROSES POLIMERISASI MINYAK KULIT JAMBU METE (CNSL, CASHEW NUT SHELL LIQUID) DENGAN FORMALDEHID ]]>
<![CDATA[Buchori, Luqman]]>
<![CDATA[ TEKNIK Volume 31, Nomor 2, Tahun 2010 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (292.418 KB)
|
DOI: 10.14710/teknik.v31i2.1769
<![CDATA[Jambu mete represents the crop which is a lot of its benefit. From various benefit of jambu mete, there is onepart of which not yet been exploited in an optimal that is husk. Whereas in its husk is contain oil so-calledCashew Nut Shell Liquid (CNSL) about 32-36%. This oil can be used as natural source phenol and alternativelysubstitution phenol from petroleum. This phenol is reacted by formaldehyde will form the phenol formaldehyderesin. Besides containing natural phenol, CNSL also contain the other bunch like karboksilat bunch, alkylbunch and alkenes bunch. This bunch will influence process of forming of phenol formaldehyde resin as aconsequence have an effect on characteristic and quality of resin so that require to be searched the optimumcondition in making of phenol formaldehyde resin. Objective of this research is to look for the optimumcondition in making of phenol formaldehyde resin of novolac type and also know the influence of comparison ofreactant and operating temperature for to resin yielded. Dependent variables in this research are reactorvolume (500 ml) with the volume bases 250 ml, catalyst acid HCl, mixing speed (200 rpm), operating time (90minute), pH (2) and operating pressure (1 atm). Independent variables are CNSL/formaldehyde ratio andoperating temperature. Perceived parameter is free rate formaldehyde. Method is used to design and processdata is RSM (Response Surface Methodology) method constructively the Static program. Result of this researchindicates that the most effect on variable is ratio CNSL/formaldehyde. Optimum condition are obtained at F/Cratio of 0.65-0.85 and temperature of 75-850C with the conversion of 0.55. The biggest rate resin obtained atF/C ratio 0.75/1 and temperature 80oC. This resin is very jell and have best sticky and also drug after runningdry. This novolac resin is applicated as furniture coating. Coating yielded have well sticky with the auburncolor.]]>
<![CDATA[STUDI PALEOSEISMOLOGI AKIBAT BENCANA GEMPA BUMI DI ZONA SESAR KALIGARANG (KGFZ) DI SEMARANG ]]>
<![CDATA[Fahrudin, Fahrudin]]>
<![CDATA[ TEKNIK Volume 34, Nomor 1, Tahun 2013 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (5388.228 KB)
|
DOI: 10.14710/teknik.v34i1.4815
<![CDATA[Earthquake in the past can study with paleoseismology. Kaligarang fault zone will record the event ofearthquake and result the sediment. The metode of research is detail field mapping and field excavation.Evidence of paleoseismology in the filed, we find the sand boil and carbon materials. We find two location ofsand boil near with reverse faults. Sand boil to precipitate at unit B Kalibeng Formation. Phase tectonic tocause earthquake occure at late Miocene – Early Pliocene.]]>
<![CDATA[ANALISA TEKNIS DAN EKONOMIS PENGGUNAAN COREMAT UNTUK KONSTRUKSI FRP (FIBERGLASS REINFORCED PLASTIC) SANDWICH PADA BADAN KAPAL ]]>
<![CDATA[Manik, Parlindungan]]>;
<![CDATA[Sasmito Hadi, Eko]]>
<![CDATA[ TEKNIK Volume 30, Nomor 3, Tahun 2009 ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (405.813 KB)
|
DOI: 10.14710/teknik.v30i3.1891
<![CDATA[Planning of ship construction is make its having good effectivity value and efficiency. Composite as materialalternative to changes of steel feedstock and wood has many applied named FRP (fiberglass reinforcedplastics) single skin. The weakness of this FRP was heavy construction and requires many production time.Therefore, will be checked comparison between single skin with sandwich constructions for shell.In this research, the way for making composite is hand lay up method with three various thickness of skinthere are : t, t/2, and t/4. To know strength comparison from the various skin of sandwich with single skin,must be test, consist of tensile test.. The result is analyzed then compared by BKI (Biro Klasifikasi Indonesia)rules for the fiberglass ship.Based on the result, indicates that optimization skin thickness of sandwich construction applies Corematwhich tensile strength it is equivalent with Single Skin at 2/3t and usage of Sandwich construction causes23,12 % lighter. In economic analyze, advantage from low weight is compensation of addition 23,12 % DWT.Material cost for Sandwich about 11,35% bigger than Single Skin construction.]]>
<![CDATA[OPTIMASI VARIABEL YANG PALING BERPENGARUH PADA PEMBUATAN BIODIESEL DARI MINYAK BIJI RANDU DENGAN PROSES TRANSESTERIFIKASI ]]>
<![CDATA[Sofyan, Mudzofar]]>;
<![CDATA[Tanjung, Ilham]]>;
<![CDATA[Santosa, Herry]]>
<![CDATA[ TEKNIK Vol 35, No 1 (2014): (July 2014) ]]>
Publisher : <![CDATA[Diponegoro University ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (895.753 KB)
|
DOI: 10.14710/teknik.v35i1.7028
<![CDATA[[Title: Biodiesel Production from Kapok Seed Oil with KOH Catalyst Using Two Steps Transesterification Process] Biodiesel is one of diesel fuel alternative made from renewable resources such as vegetable oils and animal fats. One of the natural ingredients that can be used as a material in the production of biodiesel is kapok seed. The existence of relatively abundant raw materials is a great opportunity to be developed into alternative energy options which developed on a commercial scale. Biodiesel from kapok seed oil can be made through a two-stage transesterification reaction which helped by using a base catalyst. This research aims to characterize the kapok seed oil, determine the most influential variables between temperature, the ratio of methanol-oil, and time against yield by the factorial design method, optimization variables that most influence on yield, and characterize the biodiesel. Two-stage transesterification process using KOH as the catalyst with changing variables: temperature, methanol-oil ratio, and time. The result showed that kapok seed oil has FFA content: 17.97% and a saponification number: 172.55 mgKOH/g. Most influential variable is the variable of time. At the variable optimization of time, the result were optimally obtained at the 105th minutes with yield: 77.39%. The characterization results of biodiesel’s product show from seven parameters of testing, four parameters are required in accordance with SNI.]]>
