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Tangguh Okta Wibowo
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teknosains@ugm.ac.id
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+628995674422
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teknosains@ugm.ac.id
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Gedung Lengkung, Unit 1, Lantai 2, Sayap Timur Sekolah Pascasarjana Universitas Gadjah Mada Jalan Teknika Utara, Pogung, Sleman- Yogyakarta Telp. (0274-564239 extc. 207)
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Kab. sleman,
Daerah istimewa yogyakarta
INDONESIA
Jurnal Teknosains
Published by Universitas Gadjah Mada
ISSN : 20896131     EISSN : 24431311     DOI : https://doi.org/10.22146/teknosains.xxxx
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknosains is a peer-reviewed journal which began publication in 2011, and published each semester in June and December. It is a series of scientific publications in engineering, science and technology area. Jurnal Teknosains aims to encourage research in Science and Technology studies. Topics addressed within the journal include but not limited to: Engineering, which is divided into several topics: Mechanical Engineering, Industrial Engineering, Biomedical Engineering, Chemical Engineering, Nuclear and Physical Engineering, Civil Engineering, and Planology. Basic Sciences, which is divided into: Chemistry and Physics Health Sciences, which is divided into: Medical, Biotechnology specially in Health Science, and Dentistry
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 224 Documents
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OPTIMIZATION OF MUNICIPAL WASTE COLLECTION POINTS IN YOGYAKARTA CITY- INDONESIA Bertha Maya Sopha; Alditya Perkasa Sri Haryoto
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27581

Abstract

Uneven capacity utilization seems to be a constant problem in Yogyakarta waste management system. The problem is worsen by lack of a decision tool to evaluate the system and formulate appropriate strategy.This present study therefore aims atevaluatingthe performance of existing waste management systemandoptimizingmunicipal waste collection points. A mathematical model of MixedIntegerLinearProgramming was developed and implemented inLingo 9. Findings show that the current waste management system is associated to daily total cost of about IDR 10 million and capacity utilization of 88%. Scenarios are developed to examine the optimized system. Findings suggest that current municipal waste can be handled with 35 collection points involving 15 depots and 20 containers. The optimized system is corresponding to IDR 6.3 millionand the capacity utilization of 99%, which makes a reduced cost of 37% and an increasedcapacity utilization of 13% in comparison to the performance of the existing system. Based on sensitivity analysis,volume of municipal waste appears to be influential factor toward the total cost and network structure. Limitation of the model is also discussed. 
NON SURGICAL LATROGENIC PERFORATION REPAIR USING MINERAL TRIOXIDE AGGREGATE AND DIRECT RESTORATION WITH FIBER POST ON CENTRAL MAXILLARY INCISOR Hendargo Agung Pribadi; Yulita Kristanti
Jurnal Teknosains Vol 6, No 2 (2017): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27589

Abstract

Perforation can be a problem that leading to root canal treatment failure in the long run. Perforation can be caused by iatrogenic factor. The most common iatrogenic perforation was found at maxillary anterior. Non surgery iatrogenic perforation repair can be done using mineral trioxide aggregate and direct restoration. The purpose of this case report was to describe non surgical iatrogenic perforation repair using mineral trioxide aggregate and direct restoration with fiber post. A 27 years old male patient diagnosed for pulpitis came to  RSGM Prof. Soedomo. Root canal treatment (pulp extirpation) had performed before he was referred for further treatment. Objective test showed both percussion and palpation were negative. From periapical radiograph could be noticed that there was no file left in the root canal. Root canal treatment was performed using step back technique and lateral condensation. Perforation was sealed by mineral trioxide aggregate. The tooth was restored using direct restoration with fiber post. Latrogenic perforation can be treated non surgically using mineral trioxide aggregate and directly restored using composite resin with fiber post.
MANAGEMENT OF MISALIGNED CROWN FRACTURE WITH EXTERNAL ROOF RESORPTION USING MINERAL TRIOXIDE AGGREGATE (MTA) AND CUSTOM CAST POST AND CORE RESTORATION Rebecca Azary Kuncoro; Yulita Kristanti
Jurnal Teknosains Vol 6, No 2 (2017): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27596

Abstract

Crown fracture is the most commonly reported traumatic injuries in the permanent dentition. One of the unfavorable response to trauma is the development of external root resorption (ERR). Injuries may also cause tooth angulation changes so it should be treated with a customized cast post and core to produce better aesthetic result and to obtain sufficient compressive strength.The case report describes the use of mineral trioxide aggregate (MTA) as an apical plug to promote periapical healing of an open apex and the use of custom cast post and core to correct the tooth angulation.Case report.A 23-year-old male patient came to RSGM Prof. Soedomo with a chief complaint of a fractured and labial misaligned of upper right central incisor due to trauma 10 years ago. Patient expressed his unwillingness to get orthodontic therapy. Percussion and palpation test showed no discomfort or pain. There was no mobility noticed. Radiograph showed periapical radiolucency and open apex. Tooth was treated with calcium hydroxide dressing and MTA apical plugs were placed in the apical portion of canals. Tooth was restored with custom cast post and core to correct the angulation followed by the placement of an porcelain crown.MTA can be used as apical plug for sealing open apex caused by ERR combined with custom cast post and core for other option for misaligned tooth.
APLIKASI JARINGAN SARAF TIRUAN DAN PARTICLE SWARM OPTIMIZATION UNTUK PERAMALAN INDEKS HARGA SAHAM BURSA EFEK INDONESIA Desy Wartati; Nur Aini Masruroh
Jurnal Teknosains Vol 6, No 1 (2016): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27616

Abstract

Jakarta Composite Index (JCI) is the main stock index in Indonesia Stock Exchange, which indicates the movement of the performance of all stocks listed. The data of stock price index often experience rapid fluctuations in a short time, so it is needed to carry out an analysis to help investor making the right investment decisions. Forecasting JCI is one of the activities that can be done because it helps to predict the value of the stock price in accordance with the past patterns, so it can be a consideration to make a decision. In this research, there are two forecasting models created to predict JCI, which are Artificial Neural Network (ANN) model with (1) Backpropagation algorithm (BP) and (2) Backpropagation algorithm model combined with Particle Swarm Optimization algorithm (PSO). The development of both models is done from the stage of the training process to obtain optimal weights on each network layer, followed by a stage of the testing process to determine whether the models are valid or not based on the tracking signals that are generated. ANN model is used because it is known to have the ability to process data that is nonlinear such as stock price indices and PSO is used to help ANN to gain weight with a fast computing time and tend to provide optimal results. Forecast results generated from both models are compared based on the error of computation time and forecast error. ANN model with BP algorithm generates computation time of training process for 4,9927 seconds with MSE of training and testing process is respectively 0,0031 and 0,0131, and MAPE of forecast results is 2,55%. ANN model with BP algorithm combined with PSO generates computation time of training process for 4,3867 seconds with MSE of training and testing process is respectively 0,0030 and 0,0062, and MAPE of forecast result is 1,88%. Based on these results, it can be concluded that ANN model with BP algorithm combined with PSO provides a more optimal result than ANN model with BP algorithm.
MENYELAMI ILMU BIOLOGI MOLEKULER DAN GENETIKA DARI BUKU GENOMES 3 Intan Ruspita
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27665

Abstract

Buku Genomes 3 merupakan buku yang sangat dianjurkan untuk dibaca oleh ilmuwan  di era yang sangat pesat akan perkembangan ilmu pengetahuan dan teknologi, khususnya dibidang ilmu molekuler biologi dan genetika. Penulisan buku ini telah disusun dengan sangat hati hati  agar mudah dipahami oleh pembaca dan dilengkapi dengan CD-ROM yang dapat dilihat dalam dua format, power point dan JPEG.
FUNDAMENTA LS OF BIOMECHANIC BIOMEDICAL ENGINERING Rachmat Sriwijaya
Jurnal Teknosains Vol 6, No 1 (2016): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27828

Abstract

Studi tentang biomechanics telah berkembang pesat dari awalnya hanya aplikasi studi mekanika teknik yang sederhana kemudian meluas dengan pelibatan berbagai bidang studi. Dalam bidang biomechanics buku ini sangat membantu mahasiswa ataupun peneliti untuk memahami dasar-dasar mekanika dan dinamika tubuh manusia, yang menjadi bidang kajian penting dalam studi rekayasa biomedik. Buku ini memberikan pengetahuan yang memadai tentang konsep statika, gerak, dinamika, pemodelan, dan aplikasinya dikaitkan dengan bagian-bagian tubuh dan gerakan manusia, hal-hal yang sangat penting yang seharusnya diketahui dalam pengembangan biomechanics, tetapi sebelumnya sangat jarang untuk didapatkan pustakanya.
ADVANCES IN BIOMATERIALS SCIENCE AND BIOMEDICAL APPLICATIONS Joko Triyono
Jurnal Teknosains Vol 6, No 2 (2017): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.27870

Abstract

“Advances in Biomaterials Science and Biomedical Applications” merupakan buku teks yang disusun oleh beberapa penulis dari berbagai disiplin ilmu dari berbagai negara. Setiap bab yang ditulis merupakan hasil kajian, penelitian atau pengalaman pribadi penulis. Para pembaca dapat memperoleh gambaran umum untuk mengetahui potensi biomaterial di masa-masa mendatang. Pembaca juga akan mendapatkan gambaran bagaimana proses fabrikasi material implan berbasis organ manusia dilakukan dengan teknologi cetak 3 dimensi (3D printing). Buku ini terbagi menjadi 21 bab. Setiap bab diulas secara detail agar mudah dipahami.
PENGEMBANGAN ALAT UKUR EVALUASI DAN PERANCANGAN PRODUK KURSI RODA Hapsoro Agung Jatmiko; Rini Dharmastiti
Jurnal Teknosains Vol 7, No 2 (2018): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.28222

Abstract

A wheelchair is one of the mobility aids for people with disabilities. Availability of wheelchair type is very decisive for users based on the limitations they have. The problem felt by users in Indonesia today, especially in Yogyakarta, is that users have not got the right kind of wheelchairs with the needs, with certain limitations. This study aims to develop a wheelchair evaluation and to know the user's expectation of the wheelchair design. This study shows that there are problems due to the users not getting a wheelchair that suits their needs. The wheelchair design that the users want are the wheelchair with 3 wheels and have new feature.
PENDEKATAN ANN (ARTIFICIAL NEURAL NETWORK) UNTUK PENENTUAN PROSENTASE BOBOT PEKERJAAN DAN ESTIMASI NILAI PEKERJAAN STRUKTUR PADA RUMAH SAKIT PRATAMA Aulia Yudha Prathama
Jurnal Teknosains Vol 7, No 1 (2017): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.30139

Abstract

Pengambilan keputusan dalam estimasi biaya dalam proses perancangan bangunan memiliki peranan penting. Oleh sebab itu kebutuhan akan alat estimasi baik dari sisi desain perencanaan maupun manajemen proyek perlu dikembangkan. Makalah ini membahas manfaat metodologi jaringan syaraf tiruan (Artificial Neural Network) untuk mengatasi masalah estimasi biaya nilai pekerjaan struktural pada tahap proses perancangan bangunan. Nilai pekerjaan struktural sendiri memiliki alokasi yang cukup besar dari total kontrak dan merupakan item pekerjaan yang cukup penting dalam suatu pekerjaan konstruksi bangunan. Data terkait nilai pekerjaan struktural dan desain item pekerjaan dari 8 proyek digunakan untuk pelatihan dan pengujian Metode Artificial Neural Network (ANN) dengan tujuh variabel desain digunakan dalam memprakirakan nilai biaya pekerjaan struktural dari bangunan Rumah Sakit Pratama pada daerah terpencil di Indonesia. Dari simulasi ANN diperoleh persamaan empiris terbaik untuk prakiraan harga kontrak gedung rumah sakit pada tahap perencanaan dengan struktur ANN terbaik 7-9-1 (7 variabel input, 1 hidden layer dengan 9 neuron dan 1 output) dengan hasil akurasi estimasi biaya rata – rata 96.51% tercapai.
STUDI PENGARUH JARI-JARI DALAM MAGNET TERHADAP TEGANGAN GENERATOR AKSIAL PADA BAHAN CAKRAM AKRILIK Pebri Prihatmoko; F. Danang Wijaya; Suharyanto Suharyanto
Jurnal Teknosains Vol 8, No 2 (2019): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.30958

Abstract

The high cost of making rotor discs is one aspect that becomes an obstacle in the implementation of axial generator research. This study aims to compare acrylic discs with wooden discs in terms of axial generator output voltage and production costs, so that further research can use alternative discs with lower cost. This study uses an experimental method, where this method is used to find existing variables. On a generator with an acrylic disc, the average voltage is 16.6 volts with a manufacturing cost of 151,500 rupiah. Whereas on generator with wood disc, the average voltage is 17.2 volts with a manufacturing cost of 48,750 rupiah. Thus wood disc can be an alternative material in making cheap axial generator rotor discs.

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