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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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Klasifikasi Berbasis Objek untuk Pemetaan Penggunaan Lahan menggunakan Citra SPOT 5 di Kecamatan Ngaglik Bashit, Nurhadi; Prasetyo, Yudo; Suprayogi, Andri
TEKNIK Vol 40, No. 2 (2019): Agustus 2019
Publisher : Diponegoro University

Pesatnya pertumbuhan penduduk berdampak pada peningkatan pembangunan di setiap wilayah. Hal ini menyebabkan semakin terbatasnya keberaadaan lahan pada suatu wilayah sehingga mendasari perubahan penggunaan lahan. Pembangunan harus mengikuti pada peraturan yang telah dibuat agar tidak menimbulkan masalah seperti terbentuknya lahan kritis. Oleh karena itu, pemantauan penggunaan lahan pada suatu wilayah perlu dilakukan agar pembangunan tidak menimbulkan permasalahan. Artikel ini memuat pemanfaatan metode pengindraan jauh untuk pemantauan penggunaan lahan di Kecamatan Ngaglik, Kabupaten Sleman, Yogyakarta. Metode pengindraan jauh memanfaatkan data citra satelit yang akan dilakukan proses klasifikasi penggunaan lahan. Penelitian ini menggunakan data citra resolusi tinggi SPOT 5 dengan memanfaatkan metode klasifikasi berbasis objek. Klasifikasi dilakukan beberapa tahapan seperti segmentasi, merge, rule-based classification. Penelitian ini menggunakan parameter skala 70 pada proses segmentasi. Berdasarkan resolusi citra, penelitian ini menghasilkan 16 kelas klasifikasi penggunaan lahan. Pengujian akurasi dilakukan untuk melihat akurasi hasil klasifikasi yang telah dilakukan sehingga penelitian ini menghasilkan ketelitian 80%. Oleh karena itu, klasifikasi berbasis objek pada citra SPOT 5 menghasilkan akurasi yang baik. Hasil klasifikasi memperlihatkan di Kecamatan Ngaglik masih didominasi oleh pertanian lahan basah sebesar 21.892.324,90 m2 dan perumahan tidak teratur sebesar 11.596.465,01 m2. Perumahan penduduk memiliki luas setengah dari luas pertanian disebabkan karena Kecamatan Ngaglik terletak berbatasan langsung dengan Kota Yogyakarta

KUALITAS VERSUS STANDAR Bakhtiar, Arfan
TEKNIK Volume 29, Nomor 2, Tahun 2008
Publisher : Diponegoro University

This paper discusses about standard and quality and the relation between those variables. The resultdescribes the strong relationship and contribution to the product successfulness in the trade and business.Based on the literature reviewed, it is clear that company products (goods and services) are basicallycompetitive if the product refered to designated standard. Standard automatically assures the quality of theproduct in the business tradeÂ

SIFAT MEKANIK DAN MORFOLOGI PLASTIK BIODEGRADABLE DARI LIMBAH TEPUNG NASI AKING DAN TEPUNG TAPIOKA MENGGUNAKAN PEMLASTIK GLISEROL Kumoro, Andri Cahyo; Purbasari, Aprilina
TEKNIK Vol 35, No 1 (2014): (July 2014)
Publisher : Diponegoro University

[Title: Mechanical Properties and Morfology of Biodegradable Plastic from Steamed Rice Waste and Cassava Flour with Glycerol as Plasticizer] The annual consumption of plastic packaging has increased significantly as a response to the increase of peopleâ€™s need and buying power. As a packaging material, plastic is light, flexible, practical and inexpensive. Unfortunately, if the plastic is not biodegradable and dumped irresponsibly to the ecosystem may cause serious environmental problems. The objective of this research was to study the effect of glycerol on the characteristic of biodegradable plastic from steamed rice waste and cassava flours composites. The biodegradable plastic was manufactured by casting the warm solution of flours composite with addition of glycerol as plasticizer. The results showed that biodegradable plastic obtained from steamed rice waste and cassava flours composites has limited mechanical stress, but remains flexible in nature. Good quality biodegradable plastic was obtained when 15% weight of glycerol in addition to 30:70 ratio of steamed rice waste flour to cassava flour with tensile strength 20.65 MPa, elongation at break 4.7% and Young Modulus 1138 MPa. The biodegradable plastic exhibits discontinue microstructure, rough and porous. Fourier transform infrared analysis proved the existence of OH, CH2, amide III and amida I groups in the biodegradable plastic.Â

SURVEI TOPOGRAFI UNTUK MENENTUKAN GARIS TAMPAK PANDANG BASE TRANSCEIVER STATION (BTS) Laila Nugraha, Arief; Sudarsono, Bambang
TEKNIK Volume 29, Nomor 1, Tahun 2008
Publisher : Diponegoro University

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.

KUALITAS LINGKUNGAN PERMUKIMAN KAWASAN PECINAN KOTA SEMARANG Yuliastuti, Nany; Khaerunnisa, Isti
TEKNIK Volume 32, Nomor 3, Tahun 2011
Publisher : Diponegoro University

Chinatown is a component of the urban area which has many unique possibilities and store a wide variety issuesrelated to its area development and social culture. Chinatown in Semarang is one area that has a specialtreatment from the local government of Semarang where it has a high commercial and cultural value. The areahas some issues that are often experienced by urban settlements in the high building density that causes thedifficulty of procuring open space and green open spaces, some of the environmental infrastructure damage suchas potholes, clogged channels to rubbish strewn everywhere. The purpose of this study was to assess theenvironmental quality of settlements in the Chinatown area of Semarang. General approach used in this study isa quantitative approach. While the analytical techniques used in this research is descriptive statistics, withdescriptive techniques of quantitative, qualitative and descriptive descriptive and comparative analysis ofweighting as an analytical tool used to support the analysis. The results of this study is the quality ofneighborhoods in the city of Semarang's Chinatown area belong to the category of Medium with a value of 50 inunits of percent. This value is derived from the analysis of public facilities and infrastructure conditions of theenvironment area, the analysis of the physical quality of the built environment, and public awareness of theenvironmental analysis has been done before, where all of the analysis is at a Moderate category. This indicatesthat the need to increase the quality of neighborhoods Chinatown area, in anticipation of a decline inenvironmental quality. A good public awareness of the environment in which they live will be able to preventdegradation of Semarang's Chinatown neighborhood area can even improve the quality of the settlements in theregion.

PENINGKATAN KECEPATAN PROSES PENGERINGAN KARAGINAN MENGGUNAKAN PENGERING ADSORPSI DENGAN ZEOLIT Djaeni, Mohamad
TEKNIK Volume 33, Nomor 1, Tahun 2012
Publisher : Diponegoro University

Drying carrageenan product still deals with low product quality and energy efficiency. The drying with airdehumidified by activated natural zeolite has a potential for drying the product. In this concept, air as dryingmedium was contacted with zeolite to reduce its relative humidity. Hence, the driving force of drying increasesand the process can be conducted at moderate temperature (40-60oC) to retain the quality. This research looksinto the effectiveness of adsorption dryer with zeolite for drying carrageenan. The natural zeolite is activated byheating 300-400oC for 2-3 hours. The zeolite is then used to dehumidify the ambient air as drying medium. Inthis work, the effect of drying temperature and carrageenan thickness on water content in carrageenan duringthe drying were studied. Results showed with air velocity 3.0 m/sec, thickness of carrageenan 1-2 mm,operational drying time 3 hours and air temperature 40-60oC, water content in carrageenan can be reducedfrom 82.0% to 25%. This result is very promising for industrial application.

Konsep ABG (Academic-Business-Government) dalam Rencana Sistem Industri Berbasis Potensi Daerah Kabupaten Sleman dan Gunung Kidul Bimantio, Muhammad Prasanto; Tontowi, Alva Edy
TEKNIK Vol 38, No 2 (2017): (Desember 2017)
Publisher : Diponegoro University

Daerah Istimewa Yogyakarta (DIY) mempunyai potensi industri yang cukup tinggi, baik industri kecil, menengah, maupun besar. Namun daya saing produk industri pengolahan di DIY rendah karena beberapa faktor, yakni masih lemahnya keterkaitan antar industri, keterbatasan produksi barang setengah jadi dan komponen di dalam negeri, keterbatasan industri berteknologi tinggi, kesenjangan kemampuan ekonomi antardaerah, serta ketergantungan ekspor pada beberapa komoditas tertentu. Penelitian ini bertujuan untuk membuat rancangan konsep kawasan industri berbasis potensi daerah (Domestic Based Industry/ DBI) menggunakan pendekatan sinergi Academic-Business-Government (ABG). Pendekatan ini dilakukan dengan fokus pada pemanfaatan bahan baku, sumber daya manusia, dan pemenuhan permintaan pasar lokal. Hasil kajian ini menghasilkan tiga konsep kawasan DBI yang diusulkan: (i) pengolahan produk turunan salak pondoh di Turi Sleman, (ii) pengolahan zeolit di Gedangsari Gunungkidul, dan (iii) pengolahan limbah produk biogas di Cangkringan Sleman. Ketiga konsep kawasan industri pengolahan tersebut saling terkait dan akan membentuk jejaring yang terintegrasi mulai dari bahan baku hingga produk, baik dengan industri rancangan baru maupun dengan industri yang sudah ada.

ANALISIS KONSENTRASI PARTICULATE MATTER 10 (PM10) PADA UDARA DILUAR RUANG (STUDI KASUS : STASIUN TAWANG - SEMARANG) Setiyo Huboyo, Haryono; Sutrisno, Endro
TEKNIK Volume 30, Nomor 1, Tahun 2009
Publisher : Diponegoro University

The need to obtain the speed and information accuracy provided in an organization conducting dataprocessing in gross, complex and finite during make the organization require the information system tosupport their business.Systems analysis represent the early stage in determining quality of system development in informationsystem to be developed. Analysis of Requirement of sistem, one of the phase of systems analysis, haveplaying important role to formulate what must be owned and done by an information system.This report using quistioner of the measuring instrument by using modification of Likert scale for onehundred responder to get the data. Processing data is conducting bytest of validity and reability, thenfactor analysis is done for formulation of system requirement.

ANALISIS SERAPAN KEBISINGAN DENGAN PEMASANGAN ROCK WOOL KETEBALAN 5 CM Haryono S Huboyo; Mochtar Hadiwidodo; Suhardi Suhardi
TEKNIK Volume 34, Nomor 2, Tahun 2013
Publisher : Diponegoro University

The noise affects to working quality at the same degree as those to workforce and people health, therefore,appropriate noise control is indispensable. This study is aimed at evaluating of rockwool (5cm) absorptioncoefficient and analyzing its effectivity on noise control. The room for simulation is equipped with known noisesource. In this case a sound system instrument and portable fire pump were used. The tested noise frequencieswere in the range of human hearing threshold for which an equalizer instrument was used to identify the soundfrequencies.Based on this study, the rockwool absorption coefficients were 0.8, 0.96, 0.98, 0.82 for sound frequency of 500Hz, 1000 Hz, 2000 Hz and 4000 Hz respectively. By installing the rockwool on 37.97% of room area of 72 m2,this rockwool was able to reduce the noise intensity by 10.16 dBA, 10.75 dBA, 10.5 dBA, 9.58 dBA, 9.25 dBA forfrequency of 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz and multiple frequencies respectively.The rockwool is an effective sound absorber in noise control owing to have high absorption coefficient (almostunity) and ease for installment.

Pengaruh Perlakuan Panas Terhadap Struktur Mikro, Kekerasan dan Ketahanan Oksidasi Suhu Tinggi Pada Baja Tahan Karat Martensitik 13Cr3Mo3Ni-Cor Anwar, Moch Syaiful; Yulianto, Eric Jonathan; Chandra, Septian Adi; Hakim, Rahma Nisa; Hastuty, Sri; Mabruri, Efendi
TEKNIK Vol 40, No. 1 (2019): Mei 2019
Publisher : Diponegoro University

This paper reports the effect of heat treatment on microstructure, hardness and high-temperature oxidation resistance of martensitic stainless steels13Cr3Mo3Ni-cast. The aim of this reseach is to increase quality of the steel through heat treatment process on microstructure, hardness and high-temperature oxidation resistance. Â The steels samples were prepared by a process sequence ofinduction melting, casting, austenitisazed, single tempered and double tempered. Austenitization process of 1020Â°C was conducted until 4 hours and quench in water. Then, tempering process of 650Â°C was carried out until 2 hours and cooled in the air and then double tempering process of 550Â°C was carried out until 2 hours and air cooled. The double tempered steels were subjected to microstructure, hardness and high-temperature oxidation test of 400 â€“ 700 Â°C. Then, the experimental results of double tempered steel were compared with control, austenitisazed and single tempered steels. The double tempered treatment revealed a positive effect on the increament properties of martensitic stainless steelÂ 13Cr3Mo3Ni-castÂ Â Â in the high-temperature environment.

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