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TEKNIK

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 522 Documents

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MODEL PREDIKSI TIGGI MUKA AIR SUNGAI KALI GARANG SEMARANG DENGAN JARINGAN SYARAF TIRUAN Windarto, Joko; Pawitan, Hidayat; Suripin, Suripin; J.P., M. Januar
TEKNIK Volume 29, Nomor 3, Tahun 2008
Publisher : Diponegoro University

One of the big rivers flowing in center of Semarang city is Garang river with watershed area about 220km2 and having characteristic such as big flood discharge and flash flood. Where flash flood on January25th 1990, caused more than 45 people died and goods losses until 8.5 billion rupiahs. One of some modelsto pedict water level is used black box model. Artificial Neural Network oneâ€™s of the black bock model . Inthis research, Artificial Neural Network (ANN) with back propagation method is used to predict waterlevel in Garang river where as input are rainfall in upstream of Garang river during two days, while asoutput is water level in downstream of Garang river for two hour later. Result of optimum predicting haveMSE 0.0037 and average of error 1.18 %.

Studi Kerentanan Air Tanah Terhadap Kontaminan Menggunakan Metode Drastic di Kota Pekalongan Putranto, Thomas Triadi; Widiarso, Dian Agus; Yuslihanu, Fatir
TEKNIK Vol 37, No 1 (2016): (Juli 2016)
Publisher : Diponegoro University

Kota Pekalongan berada di Pulau Jawa bagian Utara. Jumlah penduduk kota pekalongan setiap tahunnya mengalami peningkatan. Tahun 2008 jumlah penduduk Kota Pekalongan sebanyak 271.990 jiwa kemudian menjadi 290.347 di Tahun 2012.. Untuk memenuhi kebutuhan air, peduduk Kota Pekalongan menggunakan sumur gali yang menyadap air dari akuifer bebas atau akuifer dangkal. Air tanah bebas sangat rentan terhadap pencemaran akibat pengaruh letaknya yang dangkal dan aktivitas manusia. Oleh sebab itu diperlukan suatu kajian mengenai kerentanan air tanah terhadap kontaminan. Analisis dilakukan denganmenggunakan metode DRASTIC. Metode ini merupakan metode pombobotan berdasarkan beberapa parameter, yaitu: kedalaman muka air tanah (D), jumlah area recharge (R), litologi akuifer (A), jenis media tanah (S), topografi (T), jenis media zona tak jenuh air (I), dan konduktivitas hidrolika (C). Berdasarkan hasil analisis DRASTIC, terdapat tiga tingkat kerentanan yaitu: daerah tingkat kerentanan sedang dengan nilai DRASTIC Indeks (DI) 101-140, daerah tingkat kerentanan tinggi dengan nilai DI 141-180, dan daerah tingkat kerentanan sangat tinggi dengan nilai DI >180.[An Assessment of Groundwater Vulnerability of Contaminant Using DRASTIC Method in Pekalongan City] Pekalongan city which located on the north of Java Island is growing fast, in particular in the population growth. In 2008, total population in Pekalongan city was 271.990 inhabitants increased then up to 290.347 inhabitants in 2012. To fill the water necessary, people in Pekalongan city are using dug wells which are abstracted groundwater from the unconfined aquifer or shallow aquifer. Shallow groundwater can be vulnerabe which are influenced by surface and human activities. Thus, it requires an assessment of the groundwater vulnerability and risk of contaminant. It was analyzed by DRASTIC method. The DRASTIC method is applied by using weighted of some parameters, i.e.: groundwater Depth (D), amount of Recharge (R), Aquifer type (A), Soil type (S), topography (T), Impact of unsatuated zone (I), and hydraulic Conductivity (C). DRASTIC Index (DI) results in three vulnerability levels which are medium with DI 101-140, high with DI around 141-180 and above 180 for high vulnerable of contaminant.

APLIKASI TEKNOLOGI REVERSE OSMOSIS UNTUK PEMURNIAN AIR SKALA RUMAH TANGGA Ariyanti, Dessy; Widiasa, I N.
TEKNIK Volume 32, Nomor 3, Tahun 2011
Publisher : Diponegoro University

Initially, commercially available reverse osmosis (RO) systems were intended to use on ships for producing freshwater during long voyages. After the time, many developments have been conducted especially in membraneelement and system configuration. Such developments allow RO systems to be applied for home use with normalplumbing in households. A basic reverse osmosis system consists of a pressurized source of water, a membranesystem, and hoses of pipes that carry off and separate clean water and drain water. There are four types ofhousehold RO system, i.e.: undersink, whole house, multi family, farm and ranch. If a water quality problem isdue to several different contaminants, RO may be the most cost-effective method for their removal.

PENAMBAHAN HAMBATAN DALAM PERHITUNGAN TAHANAN KAPAL AKIBAT GERAK KAPAL PADA GELOMBANG Ariany, Zulfaidah
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Addition of resistance in calculation of ship resistance effect of ship motion at wave. Six natural degree offreedom by a ship thai is surging, swaying, heaving, rolling, pitching and yawing.In general movement bounce up ship have very complex geometry form and is influencing each other, eachother couple in an style system.Degradation of speed at ship done and conducted by at sea transport wayving (including wind) aim to avoidto damage or effect from green water on deck, slamming, racing propeller, and others. Is so that concludedthat calculation of ship resistance at ship progressively increase effect of ship motion at wave

Perancangan Sistem Pemantauan Gas dan Peringatan pada Ruangan melalui Jaringan Nirkabel Bhasworo, Gunawan Kunto; Rofii, Faqih; Hunaini, Fachrudin
TEKNIK Vol 38, No 2 (2017): (Desember 2017)
Publisher : Diponegoro University

Udara adalah suatu campuran gas yang terdapat padaÂ lapisan yang mengelilingi bumi. Gas CO merupakan salah satu gas yang mengandungÂ zat yang tidak baik yang tidak dapat ditangkap oleh panca indera, gas tersebut bersifat membunuh makhluk hidup termasuk manusia. Hidrogen sulfidaÂ (H2S) adalah gas yang tidak berwarna, beracun, mudah terbakar dan berbau seperti telur busuk. . Konsentrasi H2S dalam jumlah yang rendah, dapat membahayakan keselamatan manusia. Dalam konsentrasi 100 PPM dapat menyebabkan kematian dalam waktu 2-5 menit. Tidak kalah berbahayanya adalah hydrocarbon gas exploison atau ledakan yang diakibatkan kebocoran LPG (metana) pada ruang tertutup. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sebuah sistem pemantau gas dan peringatan pada ruangan melalui jaringan nirkabel. Dengan menggabungkan PC (Personal Computer), Arduino, Arduino Wifi shield, Router, LCD (Liquid Crystal Display), Buzzer serta sensor gas TGS 2620 dan 2602 serta 2442 yang merupakan sensor-sensor dengan sensitivitas yang tinggi terhadap gas LPG (metana) dan H2S serta CO dengan konsumsi daya rendah. Di peroleh sistem pemantau gas dan peringatan pada ruangan melalui jaringan nirkabel yang dapat mendeteksi dan memberikan peringatan apabila ada gas-gas berbahaya CO, H2S dan LPG (metana)

PERBANDINGAN TEKNIS DAN EKONOMIS ANTARA PENGGANTIAN BANTALAN POROS PROPELLER DIBANDINGKAN DENGAN PENGGESERAN POSISI V-BRACKET PADA KMP. KUMALA Budiarto, Untung
TEKNIK Volume 31, Nomor 2, Tahun 2010
Publisher : Diponegoro University

In the propulsion systems there are three preference components main engine, propeller shaft, and propeller.KMP. Kumala is one for all passengers ship the owner PT. Darma Lautan Utama, there are itâ€™s to experienceproblems to the systems propulsion to happen missalignment between construction v-bracket with sterntube,there are v-bracket to function become to hold up propeller shaft in the inside to find shaft bearing. Effect themissalignment, shaft canâ€™t to turn, so need the realized preparing with the change to shaft bearing shapeexentric and to scrape position v-bracket the position again. In this finish task purporting to know the valuefrom side technics and economics between to realized the change shaft bearing shape exentric with to scrapeposition v-bracket to position again with account time to docking next time. From the result analyse to find thatto change the shaft bearing shape exentric to need faster time, material cost is more expensive, labour cost ischeaper, construction to v-bracket isnâ€™t normaly, than to scrape position v-bracket to need the time is long time,material cost is cheaper, job cost is more expensive, construction v-bracket back to normal the position again,until to moment realization docking next time to need faster time, material cost and job cost is cheaper from tochange the shaft bearing shape exentric.

PENGARUH ASPEK PELAKSANAAN KONSTRUKSI TERHADAP KINERJA WAKTU PROYEK (STUDI KASUS DI DINAS CIPTA KARYA DAN TATA RUANG PROVINSI JAWA TENGAH) Hartono, Hartono; Lukman, Lukman
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

At execution process of a project of construction of building development, start from idea of up to finishing of aproject, will always influenced by previous activity, that is start from idea and planning which have beenplanned, as its execution guidance. process the the execution, will be related/relevant always with the expense,time and quality from itself construction. For that presumably require to perform of research for the problem ofexecution time of a project.This research target is to know the relation among execution of construction project to performance of projectexpense, and performance of project time. This research is expected by be of benefit to serve service, and directrelated other party with the project organizer, so that project performance of below On duty Create theMasterpiece and Planology of Province of Central Java and improved later on day.From data analysis obtained.:Make-Up of amount and appliance condition used for the work of especial,execution method work, and draw the execution, will improve the time performance.

Peningkatan Kinerja Keputusan Pembelian melalui Penilaian Kesadaran Merek, Asosiasi Merek, Loyalitas Merek dan Persepsi Kualitas menggunakan Metode Regresi Ganda: Studi Kasus Pembelian Truk di PT AIIS Susanto, Novie; Rinawati, Dyah Ika; Ramadhani, Fery
TEKNIK Vol 40, No. 1 (2019): Mei 2019
Publisher : Diponegoro University

Sales data and market share of a truck product called ILT in PT AIIS continues to decline during period 2014-2016. Based on these findings, this research examines how sales and market share of the truck could be improved. This research aims to examine the influence of brand awareness, brand association, perceived quality, and brand loyalty to the purchasing decision of ILT in PT. AIIS. The analysis technique uses multiple regression analysis. From the research result, it is found that only the brand awareness and perceived quality variables that positively and significantly influence the purchasing decision of ILT where brand awareness is the dominant factor that influences purchasing decisions. Adjusted R Square value of 0,521 indicates that 52.1% of variation of purchasing decision can be explained by four independent variables in regression equation while the rest equal to 47,9% explained by other variables which were not examined in this research.

PROSEDUR PERENCANAAN UNTUK KAPAL-KAPAL IKAN BERUKURAN KECIL Sugeng, Sunarso
TEKNIK Volume 30, Nomor 3, Tahun 2009
Publisher : Diponegoro University

Design procedure of small fishing vesels, to develop a fishing boat was required the specification datas. Thespecification datas consist of compile planning stages, steps start from picture planning, fabrication,assembling, erection. Specificaton of picture planning process and ship have to be adapted for generalconditions of the ship type to be woke up. To get result of good planning to be required by detailed data fromship to be made by considering: how big wanted of the ship size measure,or which is the value of Vfh/â–¼ ( m3 /ton),where is the ship will be operated, what the the kind of fishing gear will be supported to the ship how longtime will be needed,is required in once operate for, and others. This matter is meant to get result of planningmatching with wanted ship type, is later;then conducted by calculation and result is poured in the form of shipplanning pictures

ANALISIS PROFIL VARIASI TEGANGAN DAN KEANDALAN LISTRIK JARINGAN TEGANGAN RENDAH PLN SEMARANG SELATAN BERBASIS DATA-LOGGER Adiwismono, Agus; Wijaya, F. Danang; Tiyono, T.
TEKNIK Vol 35, No 2 (2014): (Desember 2014)
Publisher : Diponegoro University

Pengukuran kualitas dan perhitungan keandalan listrik sampai saat ini masih diperoleh dari data secara manual. Diperlukan alat data-logger yang dapat merekam nilai tegangan (indikator kualitas), dan merekam lama-waktu-padam dan berapa-kali-padam (indikator keandalan) secara realtime, sehingga diperoleh data yang akurat, yang akan meningkatkan mutu dan pelayanan listrik dengan lebih efektif dan efisien. Berbasis data logger maka analisis profil variasi tegangan dapat langsung diketahui yaitu dalam bentuk gambar gelombang (profil) variasi tegangan, demikian pula analisis SAIDI dan SAIFI dapat langsung dilakukan, yaitu dari hasil rekam data selama pengukuran lalu dihitung dengan rumus. Hasil penelitian pada penyulang jaringan tegangan rendah (JTR) SRL01, variasi tegangan yang terjadi adalah: di pangkal penyulang Vmaks = 220 volt, Vmin = 199 volt, dan di tengah penyulang Vmaks = 221 volt, Vmin = 206 volt, dan di ujung penyulang Vmaks = 221 volt, Vmin = 200 volt; dibandingkan terhadap standar variasi Vmaks = 230 volt dan Vmin = 197 volt, maka variasi tegangan yang terjadi sesuai standar. Dari perhitungan, angka lama padam (SAIDI) di sisi JTR penyulang SRL01 0,85 jam/pelanggan/bulan (belum memenuhi standar) dan angka kali padam (SAIFI) 1,05 kali/pelanggan/bulan (sudah memenuhi standar).[The Analysis of Voltage Variation Profile And Electrical Reliability of The Low Voltage Network Using Data-Logger In PLN of South Semarang] Manual measurement applied to the measurement of electricity quality and reliability has resulted in less accurate data. Data logger which records voltage value (quality indicator) and records the realtime duration and frequency of blackouts (reliability indicator) is needed to achieve accurate data, and improve the quality and services effectively and efficiently. By using the data logger the analysis of varied voltage profiles can directly be collected in the form of voltage wave (profiles), and therefore the analysis of SAIDI and SAIFI can be implemented. In the SRL01 low voltage (JTR) feeder, the form of the voltage shows : Vmax = 220 volt and Vmin = 199 volt in starting point feeder, Vmax = 221 volt and Vmin = 206 volt in the middle feeder, Vmax = 221 volt and Vmin = 220 volt in the end point feeder. Compared to the consideration standard, which shows Vmax = 230 volt and Vmin = 197 volt, the result is appropriate. Based on the calculation interruption period quantity (SAIDI) in the side of JTR feeder SRL01 shows the number of 0,85 hour/customer/month (which means itâ€™s still under the standard) and interruption frequency quantity (SAIFI) shows the number of 1,05 time/ customer/month (which means it meets a demand with the standard).Copyright (c) 2014 by Fakultas Teknik, Undip. All right reserved.

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