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Jurnal Teknosains

teknosains
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Published by Universitas Gadjah Mada

ISSN : 20896131 EISSN : 24431311 DOI : https://doi.org/10.22146/teknosains.xxxx

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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Structural performance of 1 way and 2 way setback with the soft first story using ddbd Anis Rosyidah; Indriyana Luthfiyanti
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.61136

Irregular building structures increasingly varied, such as setback buildings and buildings with soft level stiffness irregularity on the first floor of the building (soft first story). High-rise buildings are at risk of collapse due to earthquakes. Designing efficiency requires a Direct Displacement Based Design (DDBD) method. In this study, the DDBD method uses pushover analysis on soft first-story buildings without a setback,1-way setback, and 2-way setback. This study aims to obtain the value software's value of displacement, story drift, ductility, plastic hinge response, and performance levels study indicates that the displacement value of the soft first-story building without setback is smaller than the setback building. In addition, the value of displacement and story drift in the setback building with a soft first story is influenced by the small setback area ratio. The highest displacement and story drift values in the X direction are 1-way setback buildings, which are 0.422 m and 0.0147 m, while in the Y-direction, the 2-way setback buildings are 0.44 m and 0.0167 m. The most significant value of actual ductility is a building without setbacks with a soft first-story. The plastic hinge response in all three buildings shows a strong column weak beam. The level of structural performance in all three buildings is at the level of Immediate Occupancy, where the value of the performance level of the FEMA 356 method is greater than the ATC 40 method.

Faktor yang berhubungan dengan kepatuhan berobat penderita tuberkulosis paru di kota Sorong Meliana Depo; Dirgantari Pademme
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.61225

Tuberculosis is still a major burden of disease in Indonesia. The disease is highly transmissible, and if it is resistant to drugs, treatment can be take a long time. Patients with pulmonary tuberculosis will be difficult to cure if there is no regular treatment. This study aims to identify factors related to patient adherence to tuberculosis treatment in Sorong City. The study uses a cross-sectional design with 72 respondents. Data collection through interviews with a structured questionnaire. Samples were pulmonary tuberculosis patients recorded as having followed treatment for at least two months from 2018 to 2019 at RSUD Sorong. Data were analysed using the Chi-square test. The results showed that 55.6% of respondents adhered to treatment for pulmonary tuberculosis. The variables associated with adherence in patients with pulmonary tuberculosis in Sorong City were drug side effects (p-value = 0.013) and the support of the supervisor taking medication (p-value = 0.000). In order to improve adherence to tuberculosis treatment, health workers should create a tracking system for patients who are non-compliant and expand case management’s capacity to advise patients.

Efektivitas sistem gabungan penukar kalor-udara tanah dengan kolektor surya untuk pendinginan ruangan di kota Medan Tulus Burhanuddin Sitorus; Syahrul Abda
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.61271

Energy is one of the main things in a country's economic growth, but saving energy is one of the main challenges in the world today. In developing countries such as Indonesia, the energy sector is considered a crucial sector, because consumption demand increases compared to production. Therefore, to reduce energy consumption it is necessary to save energy. Earth-air heat exchanger cooling systems are one of them. The research objective was to determine the effectiveness performance of the EAHE system on changes in room temperature according to weather conditions in Medan city. The implication of this research is to reduce the consumption of electricity or fuel oil and environmental pollution. The test room has dimensions of 200 cm x 200 cm x 200 cm. Testing using a flat plate type solar collector to help the process of air movement by taking advantage of differences in air temperature. The testing process starts at 08.00 WIB to 17.00 WIB for nine hours everyday. The measurement results show that various weather conditions include radiation intensity, ambient temperature and humidity. During the test, the radiation intensity ranged from 38.10-892.12 W/m2, the variation in ambient temperature from 24.65-35.29oC and the average air humidity 68.93%. The experimental data showed that the fluctuation of indoor air temperature ranged from 23.01 to 31.84oC and the average room temperature 27.83oC. This study resulted in an average effectiveness value of the EAHE system of 51.49%. According to the result of the statistical studies, the weather conditionsthe effectiveness of the EAHE system by51,56%.

Proses difusi relativistik melalui persamaan langevin dan fokker-planck Arista Romadani; Muhammad Farchani Rosyid
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.63229

Brownian motion theory is always challenging how to describe diffusion phenomena with the main issue is how to extend the classical theory of Brownian motion to the special relativity framework. In this study, we formulated dynamics and distribution of a Brownian particle in relativistic framework by using Langevin and Fokker-Planck equation. By representing Brownian particle dynamics by Langevin equation, the velocity curves were dependent on the presence of viscous friction coefficient (heat bath), and were used generalized in special relativity theory, A relativistic Langevin equation reduces to the classical theory at low velocities. Likewise, the distribution of Brownian particles is represented as a stationary solution of the relativistic Fokker-Planck equation. From numerical results, we found that the probability density in the relativistic Fokker-Planck equation for was reduced to the standard Fokker-Planck equation in Netownian classical theory. For the calculation result showed that the Hanggi-Klimontovich approach has a consistent result to the relativistic Maxwell distribution. This work could open a promising interpretation to formulate the diffusion phenomena into general relativity theory.

Akurasi dimensi produk filamen 3d printing berbahan polipropilen menggunakan mesin ekstrusi Mochamad Edoward Ramadhan; Mahros Darsin; Sains Ilham Akbar; Danang Yudistiro
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.63878

Additive manufacturing (AM) has been trending topic in industrial revolution 4.0. One technique and the most widely used AM is fused deposition modeling (FDM), which uses a melted filament and deposited it layer by layer. The common filaments used are made of PLA, PP, and ABS, which are available at the online market with variety of prices depend on the quality. It is an advantage if we can make these filaments. In filament manufacturing, the dimensional accuracy is one of the most important factors to comply with the existing 3D printers. The aim of this research is to fabricate a filament made of PP, then assessed the quality based on the accuaray of the targeted diameter of 1.75 mm. The manufacturing process used a self-made plastic extrusion machine. Variations were made on three variables with three levels each. There are (i) heater band temperature with a minimum and maximum range (150/170 oC, 155/175 oC and 160/180 oC), (ii) winding speed (13 mm/s, 16 mm/,s and 19 mm/s), and (iii) roll distance to the nozzle set point (200 mm, 500 mm and 700 mm). Taguchi L9 design was used to design the experiments and analysis.Minitab 19 was employed to find the S/N ratio and analysis the variance (ANOVA). The results of the analysis state that two parameters have a significant effect on the dimensions of the filament, i.e. temperature and roll distance to the nozzle, while, the winding speed has no dominat effect. The best accuracy of filaments diameter was achieved when applying a combination of temperature (160/180 ⁰C), the distance between the nozzle to the roll of 700 mm, and winding speed of 13 mm/s.

Analisis spasial temporal zona rawan kekeringan lahan pertanian berbasis remote sensing Agus Suprihatin Utomo; M. Pramono Hadi; Emilya Nurjani
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.67932

A mapping model of drought-prone zones for agricultural land based on Geographic Information Systems is needed to determine the distribution of drought vulnerability levels that occured in Bantul Regency, DI Yogyakarta. This study aims to determine the estimated area of agricultural land drought based on the interpretation of aerial images. This study compares the performance of the drought potential index of agricultural land using the Normalized Difference Drought Index (NDDI) algorithm based on remote sensing technology/ Landsat 8 satellite imagery to identify the estimated zones indicated for agricultural land drought that occurred in Bantul Regency, based on trends in spatio-temporal data with recording intervals from the 2015 until 2020 data representative during the dry season. Comparisons were made by looking at the performance between indices extracted from Landsat 8 imagery data based on the value of the green vegetation parameter/ Normalized Difference Vegetation Index (NDVI) and the soil and vegetation moisture parameters/ Normalized Difference Water Index (NDWI). The method used in this research is descriptive correlative method: quantitative and qualitative deductive using geostatistical indicators based on big data analysis to measure and compare various data variables spatio-temporal. The distribution of agricultural land drought through the NDDI index transformation method on a normal, mild, moderate, to severe scale occurs in almost all areas of Bantul Regency. This happened, due to the influence of natural activities of the global climate phenomenon ENSO, the impact of the transition of the El Nino phenomenon to La Nina (wet drought) which was more dominant in 2016. The average area affected by drought in Bantul Regency on a normal scale affected was ± 6.500,49 ha, affected by mild drought was ± 17.192,16 ha, affected by moderate-scale drought was ± 8.636,155 ha, and affected by drought of heavy scale agricultural land was ± 2.407,485 ha.

Organizational internal and external resources as drivers of success in product development: A conceptual model Trifandi Lasalewo; Budi Hartono; Subagyo Subagyo; Hari Agung Yuniarto
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.66241

Products succeed if they meet customer needs and expectations. However, the capability of a corporation or organization to achieve the success of its products is determined by many variables, including being able to exploit its internal and external resources. This study is aimed to test variables that generate impacts on successful products. With the aid of research tool Vosviewer, a bibliometric network is mapped based on Scopus data of previous publications. Then an in-depth analysis is conducted on variables that are identified with a systematic review technique, in which corporational internal and external factors that have great significance on the success of products are grouped. By virtue of this research, a conceptual model is built to describe how corporational internal and external resources affect product success. It is found driving forces in promoting success of products are four internal resources like product characteristics, organization & management characteristics, innovative, and knowledge sharing, and one external resource market characteristics. The conceptual model built in this study would serve as a model for measuring the success of product development in the subsequent studies.

Analisis potensi penerapan teknologi produksi bersih pada c-maxi alloycast, Yogyakarta Dewi Masri; Wagiman Wagiman; Bertha Maya Sopha
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.67962

CV C-Maxi Alloycast is an industry engaged in the manufacture of household appliances (pans) made of aluminum which is located in Yogyakarta. The aim of the study was to identify the potential application of clean production principles in CV C-Maxi Alloycast. The methods used were production process mapping, waste analysis through liquid waste testing and potential analysis of clean production principles. The results obtained for the production process were smelting aluminum and scrap, pouring molten metal into molds, lifting molds and providing coolant, lifting castings, turning, filing, quality control, storage and distribution. Based on the laboratory test, the characteristics of the liquid waste produced by the CV C-Maxi Alloycast were pH 8.9; COD 52.1 mg/L; BOD 21.4 mg/L; TSS 6660 mg/L; Fe 4,2440 mg/L; Cu 0.0130 mg/L; and Zn 0.0893 mg/L. All parameters indicate that the value meets the quality standard, but the TSS content did not meet the NAB (Threshold Value) which refers to the Regulation of the Minister of the Environment of the Republic of Indonesia No. 5 of 2014 and the Regulation of the Special Region of Yogyakarta (DIY) No. 7 of 2016. Clean production opportunities were: good housekeeping, application of 3R (Reduce, Reuse, Recycle) on solid waste, construction of B3 Waste TPS and capacity building of human resources. Environmental performance had increased based on the Green Industry Standard (SIH) from level 1 to level 2 with a value of 53% to 65% with the implementation of clean production. The economic performance of implementing clean production gains a profit of Rp. 77,412,000,-/year, then the second alternative, namely recycling aluminum scrap is an economical alternative to clean technology with a 5-year NPV value of Rp. 37,853,056,558,- Implementing clean production can have a positive impact on the environment and the economy.

Efisiensi termal dan efektivitas produksi kondensor pada solar still terpadu Dan Mugisidi; Adittia Fajar; Rifky Rifky; Oktarina Heriyani
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.70731

Water is a basic human need that must be fulfilled. The need for clean water is increasing while the availability of clean water is limited, so researchers are trying to use sea water as raw material for fresh water. Sea water is an abundant source of water but still contains salt, therefore it is necessary to separate sea water and its salt content to produce fresh water or desalination, one way is to use solar stil. Solar stills are mostly used for desalination processes on the coast and remote area because they can be operated easily and can be manufactured at low cost. However, solar still has low productivity, so various studies have been carried out to increase desalination yields, such as the addition of a condenser. Aim of this study was to determine the thermal efficiency and effectiveness of the condenser on solar stills. The research was conducted in period March - May 2021. The materials used are aluminum with a length of 300 mm, a width of 300 mm and a thickness of 1.6 mm for the basin plate, double glass with a thickness of 3 mm for the top and sides of the solar still. The study was conducted indoor with radiation intensity using halogen lamps. The variables measured were water temperature, evaporation, inner glass surface, condenser, inlet and outlet of the condenser cooler using a fluke meter, radiation intensity using a solar power meter and desalinated water using a digital balance. From the results of the study, the average thermal efficiency of the condenser in the integrated solar still reached 83.94% and the desalination mass of seawater reached 451.32 grams with the effectiveness of condenser production of 96.4% and the correlation value of 0.99.

Optimization of chitinase production from bacillus cereus smg 1.1 using response surface methodology Adnan Widodo; Indun Dewi Puspita; Ustadi Ustadi
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.72606

Shrimp shell waste are potential to be processed further into value-added products, such as N-acetylglucosamine (GlcNAc). In the production of GlcNAc, biological approach is preferred and environmentally friendly to chemical treatment. Chitinase is an enzyme that plays a vital role in bioprocessing of shrimp shell waste into GlcNAc. Previously, Bacillus cereus SMG 1.1 was isolated from fermented shrimp paste (terasi) and showed the ability to produce chitinase. This study was designed to determine the optimum medium for the production of chitinase from B. cereus SMG 1.1 through the Response Surface Method (RSM) using a factorial design with 15 treatments. The optimization of the media was carried out by determining the factors that influence the production of chitinase through the Plackett-Burman design followed by optimization of the concentration of the media through the Box-Behnken design. The test was designed to assess the effect of the independent variables on chitinase activity. Placket Burman analysis shows that colloidal chitin, fructose, and MgSO4.5H2O were the significant components in the medium affecting the production of chitinase by B. cereus SMG 1.1. Box-Behnken analysis developed a linear model capable of predicting the response. The highest response value was achieved at a concentration of 0.75% fructose, 1.5% colloidal chitin, and 0.075% MgSO4.5H2O resulted in optimum chitinase activity of 0.0016 U/ml.

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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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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Tangguh Okta Wibowo

Contact Email teknosains@ugm.ac.id

Phone +628995674422

Journal Mail Official teknosains@ugm.ac.id

Editorial Address Gedung Lengkung, Unit 1, Lantai 2, Sayap Timur Sekolah Pascasarjana Universitas Gadjah Mada Jalan Teknika Utara, Pogung, Sleman- Yogyakarta Telp. (0274-564239 extc. 207)

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

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Abstract

Contact Name
Tangguh Okta Wibowo

Contact Email
teknosains@ugm.ac.id

Phone
+628995674422

Journal Mail Official
teknosains@ugm.ac.id

Editorial Address
Gedung Lengkung, Unit 1, Lantai 2, Sayap Timur Sekolah Pascasarjana Universitas Gadjah Mada Jalan Teknika Utara, Pogung, Sleman- Yogyakarta Telp. (0274-564239 extc. 207)

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA