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All Journal Teknika: Jurnal Sains dan Teknologi Indonesian Journal of Electrical Engineering and Computer Science
Adhitya Trenggono
University of Sultan Ageng Tirtayasa
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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IoT and transparent solar cell based automated green house monitoring system for tomato plant cultivation Yus Rama Denny; Endi Permata; Adhitya Trenggono; Vaka Gustiono
Indonesian Journal of Electrical Engineering and Computer Science Vol 22, No 1: April 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v22.i1.pp18-27

Abstract

This study aimed to develop and test the feasibility of a smart greenhouse prototype media that is used as a planting medium with an automatic watering system. The method in this study was research and development using the waterfall model. In order to test the feasibility, the prototype was validated with material expert validators, media expert, and farmers. The questionnaire instrument was compiled based on Walker and Hess instrument. The results of the research found are as follows: the results of feasibility research by media experts has an average score of 4.35 with the category "very feasible", assessment by experts the material has an average score of 4.4 with the category "very feasible", and the assessment of the user has an average score of 4.06 with "feasible". The purposed controlled system of smart greenhouse and as a media for farmers was validated. Our results demonstrated that the smart greenhouse is suitable media to help farmers cultivating the tomatoes plant.
Effect of ultraviolet exposure and palm fibre/fibreglass direction on composite Tri Partuti; Muhammad Iqbal Bariq; Yanyan Dwiyanti; Adhitya Trenggono; Erlina Yustanti
Jurnal Teknika Vol 18, No 2 (2022): Available Online in November 2022
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/tjst.v18i2.16957

Abstract

Composite can be used as an alternatif material to replace items made of wood. Wood usually not resist to water and prone to weathering in outdoor application. Composite is expected to overcome the weakness of wood. This research aims to make composite with different direction of palm fibre/fibreglass as filler and unsaturated polyester resin as matrix with hand lay-up method, also to find out whether its suitable for outdoor application or not. Ultraviolet (UV) exposure is one of element at outdoor environment that can damage polymer matrix composite. UV exposure for 1, 2 and 3 months was carried out on composites with different palm fibre directions: unidirectional, bidirectional and random. To find significant relationship between fibre direction and tensile strength, and also UV exposure time and tensile strength, correlation test was carried out using SPSS. The result shows that before UV exposure, tensile strength of composite with random, unidirectional and bidirectional palm fibre were 29.97 MPa, 28.53 MPa, and 20.92 MPa, respectively. After 3 months UV exposure, mass of composite with random, unidirectional, and bidirectional palm fibre decreased by 1.14%, 1.34%, and 1.39%, respectively. The correlation test showed that there was no significant correlation between palm fibre directions and tensile strength, and also time of UV exposure and tensile strength with correlation coefficients (r) = -0.504 and -0.237, respectively. Composite colour changed become more faded after 3 months UV exposure. Intensity change of FTIR spectra showed the degradation of composite at wave number about 1750-1725 cm-1, 1230–1260 cm−1 and 700 cm−1. Based on its tensile strength, composite can replace wood with PKKI NI-5 2002 standard for quality code E14 (for unidirectional and bidirectional palm fibre) and E12 (for random palm fibre). Aesthetically, the fading of the composite colour after 3 months UV exposure indicates that composite is not suitable for outdoor application yet.
Co-Authors Endi Permata Erlina Yustanti Muhammad Iqbal Bariq Tri Partuti Vaka Gustiono Yanyan Dwiyanti Yus Rama Denny