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Tangguh Okta Wibowo
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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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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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Pemanfaatan citra kamera inframerah thermal (kit) untuk mendeteksi area inflamasi pada tubuh manusia Mardon Limena; Giner Maslebu; Ferdy Semuel Rondonuwu
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.39672

Abstract

Inflammation is an indication of an abnormality in the human body. Cases of inflammation occur accompanied by changes in temperature on the surface of the body. The location and location of the spread of inflammation cannot be seen solely by the human eye in detail. An imaging modality tool that is suitable for use in observing this problem is needed. In this study, the Thermal Infrared Camera (TIC) is used as an imaging modality. Samples in the form of a pair of legs in which one part of inflammation occurs are used as research objects. TIC is an imaging modality tool that can detect temperatures on the surface of an object quickly and is nondestructive. The results of the TIC image are processed using the global thresholding image processing method to distinguish between the inflammatory areas and normal areas more specifically. The results displayed indicate that there are differences in the image between the area of inflammation with the normal area of the patient's feet. The results of image processing data in the form of binary images show between the inflammatory area represented by white and vice versa the normal area represented by black. A comparison between the two conditions of the patient's feet before and after recovery shows the shrinkage of the area. There are two main results obtained in the exploration of this research, which is successful in distinguishing the inflammatory area from the normal area and the progress of recovery from the legs of the affected patient.
Determination of the convective heat transfer constant (c and n) in a solar still Dan Mugisidi; Abdul Rahman; Oktarina Heriyani; Pancatatva Hesti Gunawan
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.50908

Abstract

The geometry of a solar still determines the convection constants C and n, which in turn affect the convection heat transfer coefficient’s value and mass. A method for determining the value of convection heat transfer constants C and n has already been developed by the researchers. Therefore, this study aimed to use several methods and theories to find the value of convection heat transfer constants C and n. The results are then compared with the results of the study. The solar still used in this study has one slope. To reduce variables that cannot be controlled, the data collection was conducted indoors using a halogen lamp that can be regulated as a heat source for 24 hours nonstop. The sea surface height in the solar still was maintained at a height of 20 mm, using a height regulator. Temperature was measured using a data logger set to enter data every hour. The desalinised clean water was stored in bottles placed on scales that were recorded every one hour. Room temperature was maintained in the range of 35 to 36 oC. The data in this study were used to calculate the heat transfer constants C and n to obtain the value of the convection heat transfer coefficient and mass calculation. This study compares the calculation models of Tiwari, Dunkle and Power. The following calculation model results: Tiwari model, C = 0.082 and n = 0.612; Dunkle model, C = 0.075 and n = 1/3; Power model, C = 0.815 and n = 0.611. The C and n values obtained with these four approaches reveal that the results from the Power model calculation are the closest to the actual mass, showing a percentage deviation of 1.63%.
Analysis of ceiling type to produce energy efficient residential buildings: case study on housing design of puskim pu-bandung city Nurina Vidya Ayuningtyas; Istiana Adianti; Jatmika Adi Suryabrata
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.56078

Abstract

Many houses that exist on this earth. Therefore, it is necessary to have tactical and intelligent thinking in designing a home. Many things are rarely considered related to the effects of the design of building elements when related to the temperature or the energy produced. Existing background regarding efforts to reach a comfortable temperature can not only be solved in terms of mechanical systems, but the architectural approach can help and provide a comfortable effect for its inhabitants. This research was conducted to determine the level of thermal comfort or temperature in the room of a residential design that would be related to the size of energy consumption by applying several alternative designs or ceiling forms. This type of research is research using simulation methods through a computer model. The results showed the use of ceiling type Vaulted Ceiling was able to increase the Surface Inside Temperature value by 3 ° C when compared to the type of drop ceiling. The Mean Radiant Temperature value when using the ceiling vault type rises 0.6 ° C and on the acquisition of Operative, Temperature rises 0.3 ° C. The use of insulation material on the roof can significantly reduce Mean Radiant Temperature and Operative Temperature at 1.7 ° C at Mean Radiant Temperature and 0.8 ° C at Operative Temperature. Seeing the results of the simulation in this study, the recommended ceiling type is to use the drop ceiling type because it is quite capable of keeping the temperature in the room not too high so that thermal comfort can be achieved. However, if you want to apply a ceiling design with a model or type of drop ceiling, it is better to use additional insulation material so that the heat transmission temperature is not too high in the room.
Urban tourism space based on bike-sharing tourist in Yogyakarta city Danar Wiyoso; Diananta Pramitasari
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.56079

Abstract

This paper identifies the urban tourism space in a complex way as chosen by the bike-sharing tourists in Yogyakarta. The space is defined as not only the tourist attraction object which has become a common attraction but also the elements of urban architecture such as landmarks, districts, paths, edges, and nodes that becoming lanes, stop points, and the destination for the tourist when cycling around using bike-sharing. The data collecting used in this research is person-cantered mapping by following the bike-sharing tourists’ movement and giving questionnaires to find out the tourists’ motivation in using bike-sharing for tourism. The hypothesis shows that the tourists would prefer to choose the common attraction as an urban tourism space in Yogyakarta. But by cycling, the tourists will be able to seek a new experience because they can be more flexible in exploring the space with uniqueness which has the shape of urban architecture elements. The research results showed that landmarks and paths were the two urban architecture elements that gave strong characteristics toward urban tourism space, as preferred by the bike-sharing tourists in Yogyakarta. The tourist attraction with both characteristics was located around the city centre. It indicated that the distribution of visits is still centrally located close to the bike shelters. So that the tourists could go to the other unique destinations in Yogyakarta, thus the researcher recommends that the bike shelters need to be evenly spread approaching the tourism attractions and amenities.
Strategi pengelolaan pariwisata berkelanjutan di kawasan wisata alam sumber maron, kabupaten Malang Agnes Caesarika Githanto Putri; Muhamad Muhamad; Cafid Fandeli
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.59115

Abstract

Wisata Alam Sumber Maron is a tourist destination in Malang Regency which is currently experiencing a surge in tourists. In addition, there are problems with the conversion of land from plantations to developed land. Both of these problems have an impact on the quality of the environment in Wisata Alam Sumber Maron, causing the tourist destination area to be unsustainable. The purpose of this research is to analyze the management strategies that can be applied in Wisata Alam Sumber Maron. The data analysis used is an analysis of the carrying capacity of the environment to determine its physical factors, stakeholder analysis to determine social factors and analysis of travel costs to determine economic factors. Based on the method used, the final result is ha the effective carrying capacity at the Wisata Alam Sumber Maron is 179 people/day. This figure is then used as a guideline for strategy formulation.The management strategy is formulated using the 4 pillars of tourism method as stated in the Undang-Undang Number 10 of 2009 about Kepariwisataan, namely the tourism industry, destinations, marketing, and tourism institutions.
The pattern of lingga village based on history Berkat Idaman; Shanty Silitonga; Yulianto Qin
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.60797

Abstract

Lingga Village is a tourist village that is well known as a traditional Karo tourism village and has become a major tourism destination in North Sumatra Province. This village still has a legacy of traditional Karo architecture. In ancient times this Lingga village had 80 units of traditional houses. During holidays, tourists visiting this village can reach as many as 300 people from within the country and from abroad. Currently in Lingga Village there are only two units of the Karo Traditional House. The purpose of this research is to model the village pattern of Lingga village based on interview about village’s history. The formulation of the problem that is the focus of this research are; how was the pattern of the villages, how was the orientation of the Karo Traditional House in Lingga Village in the past, how was the circulation of Lingga Village villages in the past. The research method used in this study is the simulation by modeling method. The primary data collection consisted of observing, documenting, and conducting interviews with informants from Lingga Village. Secondary data collection consists of books and journals about Lingga Village. The final result of this research is the model of the pattern of Lingga village based on history. The model focuses on house orientation, circulation patterns and types of traditional houses in Lingga village. 
The utilization of village-information system for integrated social welfare data management: actor-network theory approach in Gunungkidul regency Elanto Wijoyono
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.60798

Abstract

As the main reference to poverty alleviation in Indonesia, the policy of integrated welfare data management by the Ministry of Social Affairs still contains many inaccuracies. This has an impact on beneficiary groups as the target of the implementation of national programs on poverty reduction. This study shows how Integrated Social Welfare Data management by the local government in Gunungkidul Regency, Special Region of Yogyakarta, can solve the inaccuracy. The analysis was conducted with qualitative methods, based on actor-network theory. Data collection, verification, and validation are processed by integrating Village Information System (SID BERDAYA) and Regency Information System (SIKAB) in Gunungkidul at the local level, with the Social Welfare Information System - Next Generation (SIKS-NG) by the Ministry of Social Affairs in national level. This integration is needed to improve the quality of data accuracy and validity. Strengthening the participation and transparency of social interaction between government agencies at every level (from the village level to the national level) and the community people are important since communities are the beneficiaries. These processes will develop a reflective scheme, to make sure the quality of planning and development program on poverty alleviation is running with accurate and valid data.
Employing lipase of candida antarctica (calb) as catalyst in the acetylation of para-aminophenol in aqueous and water-free medium Hilda Ismail; Evi Lande Setiyani; Dwi Titus Indriyawati; B. S. Ari Sudarmanto
Jurnal Teknosains Vol 11, No 1 (2021): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.69113

Abstract

Candida antarctica lipase B (CaLB) is one of lipase classes enzymes that has many advantages to be used in the process of synthesizing organic compounds. In this study, some experiments were conducted to examine the ability of CaLB as a catalyst in the para-aminophenol (PAP) acetylation to produce paracetamol as the result. Two types of research have been carried out, the first one is to utilize CaLB to catalyze acetylation of PAP in a water-free reaction medium, and the second one is to use CaLB as catalyst in aqueous medium through oxidative amidation reaction. Reaction in water free system was held in ethyl catalyst acetate as solvent that also act as the acyl donor, while in the aqueous medium, acetylacetone was used as acyl donor and ethyl acetate as source to produce peracid that will be used as oxidator. Analysis was done by HPLC and TLC densitometric to follow the amount of paracetamol produced.  The results of CaLB-catalyzed acylation in water free system showed that the enzyme could accept PAF and ethyl acetate as a substrate in a nucleophilic substitution reaction, resulting in paracetamol as a product. However, the yield from the acylation of PAP is still not satisfactory. In the reaction in aqueous medium, CaLB has been proven to show its activity to catalyze the acylation of PAP with acetylacetone, as well as the reaction of peracid formation from ethyl acetate. The results show that this strategy can work well and give better yields than the other reaction in water-free medium.
Pengaruh penambahan kacang hijau (Vigna radiata (l.) R. Wilczek) pada fermentasi susu oleh lactococcus lactis nbrc 12007 Raras Ahlul Widawati; Endah Retnaningrum
Jurnal Teknosains Vol 11, No 2 (2022): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.52051

Abstract

The high content of α-galactooligosaccharide in mung beans has the potential for supporting the growth of Lactic Acid Bacteria (LAB), therefore it can be developed as fermented plant-based milk that substituted Ultra High Temperature (UHT) milk. The purposes of this research is to investigate the effectiveness of LAB Lactococcus lactis NBRC 12007 in the fermentation process of mung bean milk and to observe the quality differences of fermented mung bean milk with UHT milk.  Previously, preparations were made for starter L. lactis NBRC 12007 in MRSB medium and then sub cultured to UHT milk. Furthermore, 3% of the culture was inoculated into each of the mung bean milk substrate and UHT milk as a starter for the fermentation process and incubated for 24 hours at 37oC. During this process, the effectiveness of LAB was tested (total cell, total acid, total protein, pH, antibacterial) and the quality test of fermented products (organoleptic and physical).  Based on total cells, total acid, total protein, pH, and antibacterial test findings, fermented mung bean milk products had a higher value than UHT milk products. During the process, it was proven that L. lactis NBRC 12007 had high effectiveness in producing and improving the quality of fermented mung bean milk compared to UHT milk. It is assumed that the content of oligosaccharides supports the growth of LAB and the fermentation process.
Jejak karbon pada tahap operasional agro-eduwisata kota mataram menggunakan pendekatan penilaian daur hidup Joni Safaat Adiansyah
Jurnal Teknosains Vol 11, No 2 (2022): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.55847

Abstract

Climate change is one of the global issues that require the participation of all stakeholders for handling. In addition, the climate change issue is listed as one of the sustainable development goals (SDGs). The Government of Mataram city, as one of the stakeholders, has committed to involve the climate change consideration into its planned program, including the development of agro-edutourism facility. This study aims to calculate a carbon footprint of agroedutourism facility during the operational stage in order to implement the Greenhouse Gas (GHG) emission reduction strategy. The method used is a life cycle assessment approach with ReCiPe analysis, and the functional unit is an annual carbon footprint per m2 area of agro-edutourism. The study showed that the total carbon footprint per m2 was 2.88 KgCO2-e per annum with the primary environmental hotspot was fossil fuel utilization in energy source of agro-edutourism facility (Electricity State-own Company) and visitor vehicles. Therefore, some strategies could be applied for reducing the carbon footprint, such as increasing the utilization percentage of renewable energy (solar panel), using energy-saving bulbs, preparing the facilities for zero-emission vehicles, and applying the green building concept or design. Further research is required to assess the energy management concept from the technical feasibility aspect and economic aspect for complimenting this study.

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