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International Journal of Natural Science and Engineering

IJNSE
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Published by Universitas Pendidikan Ganesha

ISSN : 26151383 EISSN : 25496395 DOI : -

Core Subject : Engineering,

Engineering

International Journal of Natural Sciences and Engineering (IJNSE) is an independent, quarterly basis online & print version, open access, peer reviewed, non-profit journal that publishes original research, short communications, review articles or essays, and book reviews relevant to Natural Sciences and Engineering. IJNSE is published by the Universitas Pendidikan Ganesha (Undiksha), Indonesia.

Arjuna Subject : -

Articles 6 Documents

Search results for , issue "Vol. 4 No. 3 (2020): October" : 6 Documents clear

Usability Testing Website Dengan Menggunakan Metode System Usability Scale (Sus)s Welda, Welda; Putra, Desak Made Dwi Utami; Dirgayusari, Ayu Manik
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

In ensuring the effectiveness, efficiency and user satisfaction of the website, it is necessary to evaluate and evaluate the website. This study aims to analyze the Usability Testing Website Using the System Usability Scale (SUS) Method. The method used in this study is the SUS (System Usability Scale). Data collection techniques in this study were interview techniques, observation techniques or questionnaire techniques. The instrument used in this study was a questionnaire. The subjects in this study consisted of 30 respondents. The data analysis technique used in this research is descriptive qualitative analysis. The results of the evaluation in this study, namely the results of the assessment of the respondents, obtained a total value of the SUS score of 2012.50 with the resulting average value of 67.08, this shows that the total SUS score on the STIKI Indonesia website is 67.08, which means the level of user Acceptability Range is Marginal High, Grade Scale level is category D, user Adjective Rating level is OK category and SUS Score Percentile Rank is grade D. The website still needs to be evaluated and developed further so that its use can be more optimal.

Intervensi Nyeri Punggung pada Ibu Hamil di Desa Pengelatan Gozali, Wigutomo; Astini, Nyoman Ayu Dwi; Permadi, M Rizal
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

The enlargement of the uterus and weight gain in the third trimester of pregnancy then the center of gravity moves forward so that the pregnant woman must adjust her stance. Improper body changes will force additional stretching and fatigue on the body, especially in the back. One of the causes of low back pain is due to hormonal changes that cause changes in the supporting and connecting soft tissues resulting in decreased muscle elasticity and flexibility. The negative impact caused by low back pain is that it can cause a decrease in the quality of life of pregnant women due to disruption of daily physical activities. The research objective was to determine the intensity of pain before and after back pain intervention in two and third trimester pregnant women in Pengelatan Village, Buleleng District, Buleleng Regency. This research is a pre-experimental study with a "One Group Pretest-Postest" design. The sampling method used was total sampling. Data collection by interviews, observation, intervention and pain scale Visual Analog Scale (VAS). Analysis data using the univariate and bevariate analysis using paired t-test. The results of the study were differences in pain intensity before and after respondents in the massage intervention. Pregnant women should routinely do massage therapy to reduce pain.

Strength Analysis and Assessment of Ina-TEWS Wave Glider Priohutomo, Kusnindar; Nugroho, Wibowo Harso; Yulfani, Rosi Dwi
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Indonesia as a country that often experiences tsunami disasters needs to have an early warning system against tsunami disasters. This system can use various existing technologies, one of which is the tsunami buoy system. The new tsunami buoy system does not use the natural mooring system but uses the wave glider system. This paper discusses the structural strength of the surface floater of wave glider using Eva Foam and Fiberglass material for skin and Alluminium material for frame and kell. The surface floater using 16 pieces for frame and 1 piece for keel. Enviromental loads is use in this paper like hydrodynamics load and weight load. The results from this paper is material from Eva Foam has a maximum principle stress is 12693 Pa and shear stress is 6114.6 Pa. For material from Fiberglass has maximum principle stress is 11.875 Pa and shear stress is 6076.3 Pa. Safety factor (SF) from maximum principle stress and shear stress for Eva Foams is up to 6x and SF for maximum principle and shear stress for Fiberglass is up to 26x. Conclusions for this paper is the desain for surface floater of wave glider it can be operated in the sea with draugh 0.18 m.

Studi Kemampuan Penyerapan Panas pada Atap Rumah Seng Berwarna Terhadap Intensitas Matahari dalam Mengatasi Global Warming Nazaruddin, Nazaruddin; Zulfadli, Teuku; Mulkan, Andi
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

The environmental temperature has increased significantly reaching 33oC as felt by the community, one of which is in the Aceh region which triggers Global Warming. As a result of the increase in temperature in the Aceh area, many buildings and houses become uncomfortable especially during the daytime because most house with zinc roof. This will cause the temperature in the house and the air around it to increase. Therefore, it is necessary to do research on the study of heat absorption on colored zinc roofs. This research method is to calculate the heat absorption (sun intensity) in zinc that has been coated with several kinds of colors such as white, red, blue, yellow and black. The purpose of this study was to determine the color that has the least amount of heat absorption to the sun's intensity. The highest room temperature on zinc-coated black is 49.2° C and the lowest is in white. 40.9°C from the pen. In the environmental temperature observation, there is the highest temperature at 12.00. Room temperature increased the highest temperature at 12.00 on black zinc. The distribution of room temperature can be averaged with a yellow color of 46.0°C, a black color of 49.2°C, a blue of 45.5°C and a white zinc of 40.9 oC. The heat absorbed in the room is 47.9 joules, so from the overall average of the test it can be described that the room temperature is 45.6 and the zinc temperature is 53.8oC from the highest temperature difference at 12.00 WIB, room temperature and 13.00 WIB the highest absorption occurs at zinc temperature.

Stemming Teks Bahasa Bali dengan Algoritma Enhanced Confix Stripping Wardani, Ni Wayan; Nugraha, Putu Gede Surya Cipta
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Masih banyak yang mengalami permasalahan saat melakukan stemming dimana belum mampu melakukan stemming dengan tepat pada beberapa kata untuk aturan peluluhan prefix P3, P4, P5, P10, P11, dan P12. Tujuan penelitian ini adalah untuk mengkaji efektivitas algoritma Enhanced Confix Stripping Stemmer (ECS) terhadap stemming Bahasa Bali. Data yang digunakan dalam penelitian ini adalah 376 akar kata dalam bahasa Bali yang terdiri dari 240 kata yang mengandung prefiks, 17 akar kata yang mengandung infiks dan 199 akar kata yang mengandung sufix. Hasil penelitian ini menunjukkan bahwa Enhanced Confix Stripping dapat meningkatkan performansi yang sebelumnya memiliki akurasi. dari hanya 77,82% menjadi 96,94% dengan tingkat kesalahan 3,06% dan memperbaiki kesalahan yang semula berjumlah 120 sampai 20 kesalahan. Berdasarkan hasil penelitian, dapat ditarik simpulan bahwa algoritma ECS Stemmer dapat memperbaiki kesalahan yang dilakukan oleh metoda Rule Based Approach

Analisis Campuran Tanah Liat dan Batu Kapur Bukit Pecatu Sebagai Instrumen Pemanen dan Penampung Air Hujan Wijayanti, Ni Wayan Eka; Eka Suryana, I Gede Putu
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

This research originated from the large number of limestone mining in the Pecatu Hill area and it caused deep niches. On the other hand, the problem of water scarcity is the main thing, because the characteristics of karst rocks can escape, dissolve and absorb water. The condition of the ex-niche mining and water shortages are two different problems. But in this study, trying to combine these problems into a solution with the aim of making experiments that can make limestone from Pecatu Hill have the potential to hold water for a long time in the form of a miniature reservoir model. This miniature reservoir model is made with a mixture of clay suspensions of various concentrations (0%, 5%, 10% and 15%). This miniature reservoir model is tested for discharge and absorption of water which is assumed to be rainwater puddle to determine the ability to absorb rainwater. The result of this test is that the miniature reservoir with a mixture of 15% clay suspension has the ability to withstand a decrease in rainwater shrinkage of 0.04L / minute and has a small water absorption capacity of 10.91% compared to other concentrations. This shows that the miniature limestone reservoir of Pecatu Hill with a mixture of 15% clay suspension has potential as an instrument for harvesting and collecting rainwater. So this is expected to be utilized by the villagers of Pecatu Hill as an instrument for harvesting and collecting rainwater.

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