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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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OPTIMASI POSISI PILOT MENGGUNAKAN ALGORITMA GENETIKA UNTUK MENINGKATKAN KINERJA Wi-Fi 802.11n Syafei, Wahyul Amien; Nasution, Yunda Kumala; Sukiswo, Sukiswo
TEKNIK Volume 34, Nomor 3, Tahun 2013
Publisher : Diponegoro University

Wi-Fi is wireless communication technology thatÂ used widely not only for accessing the internet but also communicating data, image, voice and video. The newest wi-fi technology is 802.11n as an extention of 802.11a/b/g. By Â combining OFDM and MIMO techniques it can provide throughput up to 600Mbps. One of important factors to achieve such high throughput is the pilot position in training sequence. Wi-fi802.11n allocates itâ€™s pilots orthogonally. This research optimizes the pilot location using Genetic Algorithm Differential Evolution. Optimum pilot position improves the accuracy of synchronization which leads to enhance the performance. The invented optimum pilot position set then be implemented into wi-fi 802.11n simulator to be analyzed the performance enhancement which represented in grafic BER vs SNR curve.Run test under channel model B and D proof that the invented optimum pilot position gives performance enhancement of 0,5 dB and maintain itâ€™s stability compared towi-fi 802.11n system with Â set ortogonal pilot position.

PELUANG PENGEMBANGAN SMART CITY UNTUK MEWUJUDKAN KOTA TANGGUH DI KOTA SEMARANG (Studi Kasus: Penyusunan Sistem Peringatan Dini Banjir Sub Drainase Beringin) Sariffuddin, Sariffuddin
TEKNIK Vol 36, No 1 (2015): (Juli 2015)
Publisher : Diponegoro University

Kota tangguh menjadi metafora baru yang banyak diperdebatkan oleh para perencana dan peneliti kota dalam upaya menjamin keberlanjutan. Konsep ini mengusulkan 2 kerangka konsep yaitu model ekuilibrium dan model non-ekuilibrium. Perbedaan kedua model ini adalah cara kota untuk beradaptasi terhadap bahaya yang dihadapi. Di model keseimbangan/ ekuilibrium, sistem kota harus memiliki titik acuan sebagai orientasi tujuan pembangunan kota. Jika terdapat gap antara dokumen perencanaan dan hasil pembangunan, perencana kota dapat mengembalikan proses perencanaan sesuai tujuan perencanaan dan pembangunan. Di sisi lain, model non-ekuilibrium menawarkan sistem adaptasi. Dalam perspektif non-ekuilibrium, ketahanan diartikan sebagai kemampuan sistem kota untuk beradaptasi dan menyerap perubahan dari internal maupun eksternal. Terdapat kebutuhan baru dalam mengelola kota yaitu respon cepat, data yang akurat dan real time. Konsep kota pintar/ smart city menawarkan sebuah solusi melalui penyediaan data real time dan menjadi penghubung antara intervensi top-down dengan partisipasi bottom-up. Kota pintar tidak hanya menyediakan sistem informasi dan teknologi, namun juga mendukung modal intelektual. Artikel ini menggunakan studi literature melalui perbandingan 2 konsep literature yaitu smart city dan kota tangguh/ resilience city. Dari pembahasan diketahui bahwa smart city dapat mendukung kota untuk bisa bertahan melalui sistem peringatan dini. Sistem ini dapat meningkatkan kemampuan masyarakat untuk mengetahui bahaya dan mendukung upaya yang harus dilakukan secara mandiri.[The Opportunities of Smart City Development to Realize the Resilient City in Semarang (Case Study: Flood Early Warning System in Beringin Sub-Drainage] City of resilience become to a new metaphor that debated by researcher and urban planner to manage its city in order to ensure sustainability. This concept suggests 2 conceptual frameworks: equilibrium or isolation model and non-equilibrium model. The differences of both models are the way of city to adapt from disturbance. In equilibrium model, urban system must own end point or terminal as city orientationor goal. If any gap between planning document and development result, urban planner has to restore the development process into its plan or end point. On the other hand, non-equilibrium model offers adaptation system. In non-equilibrium perspective, resilience is the ability of an urban system to adapt and adjust to changing internal or external processes. There is a new necessity to manage city i.e. quick response, adequate data and correct according real time data. Smart City offers a solution to provide real time data and bridging between top-down intervention and bottom-up participation. Smart city doesnâ€™t only provide information system and technology, yet its concept can support intellectual capital. This article used literature study through compare 2 conceptual theoretical framework i.e. smart city and resilience city. From this discuses found out that smart city can support city to be resilience with early warning system. This system can improve human ability to know a circumstance and action to evacuation.Â

REDESAIN TANDU UNTUK MENDUKUNG MOBILITAS DAN PENYIMPANAN MENGGUNAKAN TRIZ Nugroho W.P, Susatyo; Nurkertamanda, Denny; Mahendra, Dhani
TEKNIK Volume 32, Nomor 1, Tahun 2011
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v32i1.1688

Most Victims Of Accidents That Occur In Mountainous areas is injured in fractures and spinal injuries. Spinalinjury itself should be evacuated using a spinal stretcher, but because of its shape, difficult spinal stretcher wasbrought to the location of the disaster. While the standard stretcher has the ease of mobilization but it cannotaccommodate victims with spinal injuries. On the other hand, power and heavy litter becomes a veryimportant factor in the development of this litter product.The purpose of this study was to develop a standard stretcher that can be used to accommodate all types ofinjuries and a strong stretcher and rigan. TRIZ is used to resolve the contradictions that occurred. After a seriesof studies produced improvements in the standard litter that can accommodate victims of spinal injury whileprovding ease of mobilization for evacuation and storage process. And produced tools to maximize the use ofstretchers.

STUDI PEMBENTUKAN ZONE JARINGAN PIPA DISTRIBUSI AIR MINUM KOTA SEMARANG (Wilayah pelayanan PDAM SEMARANG UTARA ) Nasrullah,, Nasrullah; Arief Budihardjo, Mochamad
TEKNIK Volume 28, Nomor 1, Tahun 2007
Publisher : Diponegoro University

Semarang Cityâ€™s drinking water distribution system in the North Semarang uses an interconnectionnetwork system. This causes difficulty in optimizing the network distribution supply and controlling thewater leakage. Semarang Cityâ€™s drinking water provider is planning to divide the area in to 25 zones. Thisstudy purpose to plan one of the zone areas, which is zone 1. The existing condition on zone 1 shows thatthe water source is from Siranda distribution reservoir. The water flows by the gravitation. The distributionpressure on the pipe network is not even. Pressure drop between 3 to 7 m water columns at the peakcondition on the end of the furthest point in the network. The strategy in planning the network is by cuttingthe interconnection pipe, providing new pipes, closing the existing valves, adding new valves for isolatedareas, adding primary water meter and sub zone water meter and moving the interconnection pipes. Then,the distribution system is analyzed using Epanet 2.0 program that can show the effort of the changes after.The system shows that there is no more pressure drop on the area. The pressures are between 11-16 meterwater column and the water flow in the pipes are more alike, between 0,3 to 3 m/s. The PDAM can observethe distribution and the water leak more easily by using this system.

Kajian Penentuan Arah Kiblat Secara Geodetis Awaluddin, Moehammad; Yuwono, Bambang Darmo; Haniâ€™ah, Haniâ€™ah; Wicaksono, Satrio
TEKNIK Vol 37, No 2 (2016): (Desember 2016)
Publisher : Diponegoro University

Kiblat merupakan arah penting Umat Muslim menghadapkan dirinya saat melakukan ibadah shalat. Pengukuran arah kiblat kemudian menjadi permasalahan ketika lokasi suatu tempat jauh dari Kaâ€™bah karena tidak dapat dilakukan pengamatan penglihatan secara langsung. Oleh karena itu diperlukan metode yang tepat untuk menentukan arah kiblat di daerah yang jauh dari Kaâ€™bah, dalam penelitian ini Kota Semarang. Makalah ini mengkaji besarnya perbedaan arah kiblat pada tiga bidang hitungan ellipsoid, bola dan Peta Mercator. Arah Kiblat pada ketiga bidang hitungan tersebut dibandingkan dengan arah kiblat hasil pengukuran rashdul qiblat. Arah kiblat hasil hitungan di atas ellipsoid yang sudah dikoreksi dengan di atas bola mempunyai perbedaan yang jauh lebih kecil yaitu sebesar 45,7â€ jika dibandingkan dengan arah kiblat pada Peta Mercator. Perbedaan arah kiblat di atas ellipsoid yang sudah dikoreksi dengan arah kiblat hasil rashdul kiblat di lapangan sebesar 00 7â€™ 58,24â€. Sedangkan untuk selisih arah kiblat di atas bidang bola dengan azimut hasil rashdul kiblat sebesar 00 2â€™ 49,94â€.Â [Title: Study of Geodetic Qibla Direction Determination] Qiblah is an important direction for Muslims exposes himself while performing prayers. Qiblah direction determination becomes a problem when the location of a place far away from the Kaaba. Therefore we need a method to determine the exact direction of Qibla in areas far from the Kaaba, in this study Semarang. This paper examines the difference of the direction of Qibla on three calculation surface: ellipsoid, spherical and mercator map. Then these Qibla direction accuracies on three calculation surface were compared with Qibla direction resulting from Rashdul Qibla Measurement. The difference of ellipsoid Qibla direction that has been corrected and spherical Qibla direction has a much smaller difference in the amount of 45.7 " compared with Mercator Qibla Direction. The difference of ellipsoid qibla direction and Qibla direction resulting from Rashdul Qibla Measurement is 00 7â€™ 58,24â€. While the difference of spherical Qibla direction and Qibla direction resulting from Rashdul Qibla Measurement is 00 2â€™ 49,94â€.Â

DESAIN PERANGKAT-KERAS KOMPONEN PENDUKUNG PENGEMBANGAN RADAR SEKUNDER UNTUK TRACKING TIGA DIMENSI TRAYEKTORI UJI COBA ROKET Darjat, Darjat
TEKNIK Volume 31, Nomor 1, Tahun 2010
Publisher : Diponegoro University

Topic executed by is " Development of Secondary Radar For The Tracking Of Three Dimension Trajectory Test-Drive The National Rocket".In first year of research focussed at desain and making of component of hardware of producer of radio frequency 900 MHZ. Technological Development of rocket is not quit of other technology, one of them is secondary radar. Communications of radio data overcome through the secondary radar need a component hardware capable to awaken the radio frequency as according to wanted job frequency.This article study about method of hardware desain transceiver which usually implementation by PLL ( Phase Locked Loop) or underlayer modulation locked by the phase to arrange the VCO ( Voltage Controlled Oscillator) what is used. Component used by is IC transceiver RFM12BP integrating all function of radio frequency in single chipPrototype which is being developed by to build the transceiver FSK use the unit microcontroller , crystal, capacitor and antenna; separated. Obtained by result that system of radio frequency developed by earn the implementation for the system of secondary radar ably stable frequency at specified frequency arrangement

ANALISA KINERJA DAN TINGKAT KEPUASAN PELANGGAN PDAM KOTA UNGARAN KABUPATEN SEMARANG Bambang, Setiabudi; Suharyanto, Suharyanto; Syafrudin, Syafrudin
TEKNIK Volume 33, Nomor 2, Tahun 2012
Publisher : Diponegoro University

The need for water supply always increases with population growth and development of the region, demandingPDAM Semarang able to provide a better service to their communities.The issue of high rate of leak, the high discharge capacity untapped and range of services is still very low whichis a major problem for the Semarang District PDAM water supply for the City of Ungaran. Similarly on thequestion of the level of customer satisfaction and service performance should be analyzed so that companies canknow the goals and strategies in improving water services to the community.Customer satisfaction to water supply services, measured in terms of customer perception in the use of watersupply. The analysis showed that customer satisfaction in the category of high levels of satisfaction are stronglyinfluenced by water pressure, adequacy of water use, quality of complaints handling and accuracy of watermeter readings.The results of the performance assessment of water services which refers to two normative rules, namely No.47of 1999 Kepmendagri obtain the final value of 58.16 is included in the category of adequate and appropriatecriteria BPPSPAM obtain the final value of 2.055 is included in the healthy category.From the results of the performance analisia taps and customer satisfaction level analysis shows that there aresome indicators of corporate performance and customer satisfaction needs to be improved and enhanced.

Peningkatan Akurasi Penentuan Base Transceiver Station Menggunakan Kombinasi Metode Weighted Product Dan Analisa Regresi Linier Berganda Wibowo, Gracia Sonia Lestari; Sulistyo, Wiwin
TEKNIK Vol 39, No 1 (2018): (July 2018)
Publisher : Diponegoro University

Kebutuhan akan tersedianya internet semakin meningkat sekarang ini. Untuk menunjang kebutuhan tersebut, Internet Service Provider (ISP) membangun menara Base Transceiver Station (BTS). Permasalahan timbul ketika terdapat banyak pilihan BTS yang dapat digunakan client untuk terhubung ke jaringan ISP. Metode Weighted Product dapat digunakan untuk menentukan pilihan BTS yang tepat dalam waktu singkat. Metode ini dikombinasikan dengan analisa regresi linear berganda untuk menentukan bobot awal bagi masing-masing kriteria penentuan pilihan. Pada pengujiannya, model yang dihasilkan memberikan akurasi mencapai 73% yang dilakukan terhadap 30 titik client pada PT. Grahamedia Informasi.

ANALISIS TRAFIK SUARA JARINGAN KOMUNIKASI TELEPON PT. BADAK NGL BONTANG â€“ KALIMANTAN TIM Ajulian Zahra, Ajub; Giri Laksono, Nur Muhammad
TEKNIK Volume 30, Nomor 2, Tahun 2009
Publisher : Diponegoro University

In time being, the user of telecommunication provider is growing up, both of voice and datatelecommunication, so it is needed to design a good and accurate telecommunication tools to avoidproblemâ€™s user. In this case, PT. Badak NGL Bontang needs to review the telecommunication tools(number of trunk) because of reducing the number of employee for re-organization.In this paper, application programme is made to analyze voice traffic data with the result that to determineoptimalization number of trunk. Work and condition of system in traffic analysis is influenced by trafficparameters, like ASR (Answered Seizure Ratio), SCH (Seizure per Circuit per Hour), MHTS (MeanHolding Time per Seizure), dan GOS (Grade of Service).From traffic analysis, optimalization number of trunk is 33 trunks with the value of grade of service is 0,1%., so the efficiency number of trunk in PT. Badak NGL is 41,25 % which is determined from comparisonthe number of trunk in traffic analysis (33 trunks) and the number of trunk in PT. Badak NGL Bontang (80trunks), so with 33 trunks, the probability of blocking is still low. In traffic analysis, the condition of systemwill be busy if the value of real grade of service is higher than the value of grade of service which isdetermined, and the condition of system will be normal if the value of real grade of service is lower thanthe value of grade of service which is determined.

KAJIAN PEMODELAN ARUS DAN SEDIMEN DI SEKITAR JETTY MUARA SUNGAI Parmantoro, Priyo Nugroho
TEKNIK Volume 34, Nomor 3, Tahun 2013
Publisher : Diponegoro University

The use of models in the design of jetties at the river mouth is intended to achieve efficiency and predict the function of events forces the river and marine hydrodynamics in a variety of scenarios handling of sedimentation in the estuary. One of the aspects of impacts of current changes that are modeled around the estuary in both the condition before treatment and after a jetty. While other aspects that need to be considered is the hydraulics of the river in the upper-estuary, shoreline change and ocean wave characteristics around the mouth of the river jetty. To be able to know the current pattern of movement around the mouth of the river jetty used models of Surface Water Modeling System (SMS) As a research object is used Silandak Jetty. It has the data before the jetty was built so that could be compared with the condition in which the jetty has been built. Current survey results that occurred in these waters is caused by tidal forces and non tidal. Due to the influence of tides, currents tend to back and forth in a certain direction (from the sea into the estuary). While the non-tidal forces tend to be dominated by the longshore current (caused by the influence of the wave). The simulation result shows a flow that at low tide the sea water circulation in the waters in Silandak moving toward the west to the northwest while the tide moves in the opposite direction heading east with a range between 0,05 to 0,25 m/sec. Sediment modelling shows that flushing sediment has effectively result. Key words: Jetty, Current, Sediment

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