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Rahmad Abdillah
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Science, Technology, and Communication Journal
Published by Lembaga Studi Pendidikan and Rekayasa Alam Riau
ISSN : -     EISSN : 27748782     DOI : https://doi.org/10.59190/stc
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology
Sintechcom is a periodical publication that publishes scientific articles on research results in the fields of Basic Science, Engineering, and Telecommunications. Scopes of journal are: Chemistry and Chemical Engineering; Physics, Material Sciences, and Mechanical Engineering; Biology, Biological and Bio System Engineering; Food and Agriculture Engineering; Statistics and Mathematics; Computer Science and Computational Science; Earth Science and Engineering; Space Engineering; Electrical Engineering; Environmental Science and Soil Science; Telecommunication; Electronic and Optic Communication; Image Processing, Computer Vision and Pattern Recognition ; Energy Conservation and Renewable Energy; Information System and Artificial Intelligence.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol. 2 No. 1 (2021): SINTECHCOM Journal (October 2021)" : 5 Documents clear
On left fq-derivations of B-algebras Yattaqi, Egytia; Gemawati, Sri; Hasbiyati, Ihda
Science, Technology and Communication Journal Vol. 2 No. 1 (2021): SINTECHCOM Journal (October 2021)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i1.197

Abstract

In this paper, we introduce the notion of left fq-derivation of B-algebra and investigate some related properties. Among them are properties of left fq-derivation  of B-algebra  and given properties of . Then, we discuss the properties of the regularleft fq-derivation on B-algebras and composition properties of fq-derivation on particular B-algebra, namely on BM-algebra.
Observation of growth rate of catfish (Pangasius sp.) against mixed feed fermentation of mustard and cabbage waste flour Yustina, Yustina; Wulandari, Sri; Priawan, Oky
Science, Technology and Communication Journal Vol. 2 No. 1 (2021): SINTECHCOM Journal (October 2021)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i1.202

Abstract

A study was conducted to measure the growth rate of catfish (Pangasius sp.) due to feeding on a mixture of fermented mustard and cabbage waste flour (FMCWF). Catfish are distributed in each container per box, consisting of five fish with an initial weight of 3 – 5 grams. During 56 days of cultivation, three times a day were fed with a feeding rate of 5%. The randomized block design method was used as the concept of this research. There were five treatments and each treatment was repeated three times. The type of catfish feed provided consisted of factory feed and its mixture with different percentages of FMCWF: P0 (manufactured feed brand Matahari Sakti); P1 (FMCWF 15%); P2 (FMCWF 30%); P3 (FMCWF 45%); and P4 (FMCWF 60%). Observations were made on several parameters such as absolute weight growth, feed conversion ratio, and water quality. Based on the analysis of variance (ANOVA) test, the results showed that the growth rate of catfish was influenced by FMCWF with a significant effect (p < 0.05). The best growth rate was given to P2 treatment (FMCWF 30%) with an absolute weight growth of 8.11 grams and a feed conversion ratio of 1.5.
Determination of optical parameters on knee bending of the feet using fiber optic Fitri, Ade; Candra, Wahyu; Meyzia, Bunga
Science, Technology and Communication Journal Vol. 2 No. 1 (2021): SINTECHCOM Journal (October 2021)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i1.203

Abstract

Fiber optics are the right transmission medium to monitor the movement of the human body, one of them is knee activity. Single-mode fiber (SMF) and fiber Bragg grating (FBG) as sensing sensors that can monitor damage to bad conditions of the human joint area so can prevent further damage. The purpose of this study was to design fiber optic-based belts due to macrobending with sinusoidal patterns, determine the relationship of knee benders with average power change of SMF and FBG, measure changes in power loss (L) fiber optics as a function of optical fiber diameter (d) and knee angle, and determine the optimum sensitivity (S) of SMF and FBG in detecting knee bending. The results showed that L of 0.0751 dB and S of 0.017442 dB are the largest values produced from the SMF belt with values d of 12 mm and knee angle of 180°. The values L of 2.0177 dB and S of 0.591382 dB are the largest values produced from FBG belts with values d of 8 mm and knee angle of 180°. The results of this study explain that FBG is more effective to use because it has a higher S value than SMF.
Reflective and structural characteristics of natural pearl Roslan, Muhammad Sufi; Zin, Ahmad Faiz Mat; Rosley, Rozainita; Abdullah, Fazreen Batrshia; Amran, Nur Shazreen; Rosslan, Nur Jannatul Aqilah; Jameel, Muhammad Hasnain; Haider, Syed Zuhaib
Science, Technology and Communication Journal Vol. 2 No. 1 (2021): SINTECHCOM Journal (October 2021)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i1.204

Abstract

In this study, we analyzed the reflective and structural nature of natural freshwater pearls that originated from Sabah, Malaysia. Seven color pearls from brightest to darkest ones were examined and analyzed by UV-Vis spectroscopic and electron microscopic techniques. Results showed that the UV-Vis spectrum of black shows that reflection occurs at 530 – 540 nm, 600 – 610 nm, 660 nm, and 690 nm which are reflective of green, yellow, and red. However, it mainly differs from other color spectrums as it shows great absorption at wavelengths 270 – 300 nm. Meanwhile, white pearl reflects most of the visible color at wavelength 400 nm, 450 – 470 nm, 550 nm, 600 – 630 nm, and 665 nm which represent all colors possessed by the visible spectrum. FESEM studies show the formation of tablet structures in smooth layers transition between vaterite and aragonite in black pearl. The structural arrangement of its layers is closer and there are many big circular spots on the copper pearl. Besides, the pearl’s surface looks a bit rough. The layer of aragonite platelets in hexagonal shape gives the pearl's prismatic layer in pinkish pearl. Meanwhile, the arrangement of vaterite layers looks smooth and the layers of the stack are arranged in parallel in white pearl. The different morphology of pearl reflects the different colors as well.
Microwave media simulation to generate nitrogen plasma at atmospheric pressure Fauzan, Muhammad; Fardinata, Reeky; Ramadhan, Khaikal
Science, Technology and Communication Journal Vol. 2 No. 1 (2021): SINTECHCOM Journal (October 2021)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i1.209

Abstract

The development of methods to generate artificial plasma continues to be carried out for industrial purposes in machines and production products. To overcome experimental problems in modeling development, various methods have been carried out. One of the methods used is to simulate the air in a microwave oven. This simulation will describe the electric field distribution of each mode to identify the plasma by introducing the cutoff frequency. Ionization gas with a composition of 78% Nitrogen, 21% Oxygen, and 1% other gases at a pressure of 1 atm. The microwave oven chamber is made of an iron conductor in the form of a beam with dimensions 29 × 29 × 19 cm3, with a continuous supply of 800 W and 220 V. Power loss as a function of frequency shows the cutoff frequency using an S-parameter graph and electric field distribution as a function of position in each mode. The plasma formed is in modes 20, 01, and 11 because the electric field exceeds the breakdown voltage value to generate plasma, which is 6 × 106 V/m. The bigger the electric field, the more plasma is produced, which is indicated in the mode positions in the microwave oven.

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