Journal title Abbreviation Frequency Publication Language DOI Prefix Online ISSN Print ISSN Editor-in-Chief Publisher Country OAI Address : Jambura Physics Journal : Jambura Physics J. : Biannual (April and October) : English (preferable), Indonesia : 10.34312/jpj : 2721-5687 : 2654-9107 : Muhammad Yusuf : Department of Physics, Universitas Negeri Gorontalo : Indonesia : http://ejurnal.ung.ac.id/index.php/jpj/oai
The author who publishes in Jambura Physics Journal (JPJ) agrees to the following terms: The journal allows the authors to hold the copyright without restrictions and allow the authors to retain publishing rights without restrictions. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution 4.0 International License. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access). Ciptaan disebarluaskan di bawah Lisensi Creative Commons Atribusi 4.0 Internasional.
RANCANG BANGUN SISTEM KONTROL MINIATUR ALAT PEMINDAH MATERIAL PADA PROSES DISTRIBUSI BIJIH NIKEL MENGGUNAKAN PLC
This research aims to make a miniature ore material transfer tool automatically using Omron PLC. The way this tool works is that when the start button is pressed, motor 1 will move the apron containing the ore to be taken to the 3 storage barrels to be filled alternately. In each storage barrel, a proximity sensor is installed to detect the level of ore filling. On the rails that are passed by the apron, there are three limit switches that serve as indicators that the position of the apron is right above the storage barrel, then motor 2 will open the valve on the apron so that the ore on the apron falls into the reservoir. From this research, we have succeeded in obtaining an automatic control system for a miniature material transfer device in the ore distribution process.
Copyright (c) 2023 Abdul Haris Mubarak, Moh Afandy, Muhammad Khaidir https://creativecommons.org/licenses/by/4.0
THE EFFECT OF HYDROTHERMAL TEMPERATURE AND UREA DOPING TIME ON THE OPTICAL PROPERTIES OF LEMONGRASS-BASED CARBON NANOPARTICLES (CNPs)
Carbon Nano Particles (CNPs) sourced from spiced lemongrass have been produced by the hydrothermal method at hydrothermal temperatures of 120, 140, 160 and 180 0C. The Stokes energy shift occurs due to this absorption transition and the spectrum width is determined by the electronic transition from one energy state to another. This event occurs due to the difference in energy between the two adjacent states due to the smaller vibrational state when compared to the electronic state of the CNPs. The carbon nanoparticles (CNPs) size measurement results showed a peak value of 38.63 nm. Functional group analysis by FTIR spectroscopy showed that the CNP consists of C=C, C-O, OH and C-N-C bonds. The Urbach energy (Eu) increased with increasing hydrothermal synthesis temperature at two hours (0.13, 0.16, 0.19 and 0.29) eV and three hours (0.12, 0.17, 0.19 and 0.28) eV. The bandgap energy (Eg) decreased with increasing hydrothermal synthesis temperature to two hours (2.30, 2.24, 2.00 and 1.92) eV and three hours (2.22, 2.20, 2.17 and 1.75) eV. The expansion of urea as a nitrogen source was carried out at a aqueous temperature of 180 0C for 2 hours and 3 hours within the blend of CNPs. The addition of urea gave a different effect on the bandgap energy (Eg) and Urbach energy (Eu) on the two CNPs. The bandgap energy (Eg) both increased from two hours (1.92 eV) to three hours (2 .22 eV), while urbach energy (Eu) decreased for a duration of two hours (3.336 eV) to three hours (3.330 eV) after adding urea. hydrothermal temperature due to synthesis time so that the structure of the CNPs becomes more stable and homogeneous
Copyright (c) 2023 Rahmaniah Nalwi, Akhiruddin Maddu, Mersi Kurniati, Jumardin https://creativecommons.org/licenses/by/4.0
SISTEM KENDALI JARAK JAUH BEBAN LISTRIK RUMAH TANGGA BERBASIS INTERNET OF THINGS (IoT)
This study aims to optimize the existing remote control system. Previous Remote Control Systems only operated on local networks using the TCP/IP model. The control system created is a remote control system development of the TCP/IP model. This control system can control and monitor the status of electrical loads using a smartphone device without being limited by distance. The method used in this research is the system design method. The result of this research is a prototype capable of controlling electrical loads from an unlimited distance. The test results show that the system works according to the program that was created. This system has great opportunities to be developed in terms of user access security. Penelitian ini bertujuan untuk optimalisasi sistem kendali jarak jauh yang sudah ada sebelumnya. Sistem Kendali jarak jauh sebelumnya hanya beroperasi pada jaringan lokal menggunakan model TCP/IP. Sistem kendali yang dibuat merupakan pengembangan sistem kendali jarak jauh model TCP/IP. Sistem kendali ini dapat mengontrol dan memonitor status beban listrik menggunakan perangkat smartphone tanpa dibataisi oleh jarak. Metode yang digunakan pada penelitian ini adalah metode sistem rancang bangun. Hasil dari penelitian ini adalah sebuah prototype yang mampu mengontrol beban listrik dari jarak yang tidak terbatas. Hasil ujicoba menujukkan bahwa sistem bekerja sesuai dengan program yang dibuat. Sistem ini memiliki peluang yang besar untuk dikembangkan dari sisi keamanan akses pengguna.
Copyright (c) 2023 Hermansyah Hermansyah, Nur Asmi Rahmawati https://creativecommons.org/licenses/by/4.0
THERMAL PERFORMANCE OF RESIDENTIAL HAUSE USING GREEN ROOF BY UTILIZING THE PASSION FRUIT PLANTS (PASSIFLORA EDULIS) AS ROOF COVER
Urbanization is the movement of people from villages to cities, this has caused an increase in population growth in urban areas resulting in increased demand for development which has reduced land for green spaces, green roofs are present as a farming concept amidst limited land in urban areas as well as assisting in passive cooling. The process of photosynthesis must play a role in roof shading. The selection of vegetation in the form of passion fruit vines as a roof covering material can spread up to 24 m, the object of research is a house in a housing complex by comparing two rooms, using a vegetation roof cover and without a vegetation roof cover, based on the results obtained a room with a vegetation roof cover experienced a decrease in temperature as the growth of vines covered the roof, the results obtained were a comparison between the two rooms, namely 0.1â„ƒ in January, 1.1â„ƒ in February and 2.6â„ƒ in March when the peak temperature is during the day.
Copyright (c) 2023 Suwaldi Mopangga, Mohamad Jahja, Dewa Gede Eka Setiawan, Mursalin, Idawati Supu, Meilan Demulawa, Abdi Gunawan Djafar https://creativecommons.org/licenses/by/4.0
PARTICLE BOARD HEAT INSULATION PINEAPPLE LEAF FIBER WASTE AND HVS PAPER AS AN ALTERNATIVE TO IMPROVE INDOOR ENVIRONMENTAL QUALITY
The limited supply of wood as a raw material in various industries requires a better alternative material. Wasted-based composite engineering can be a solution to this problem. What's more, composite can be engineered according to needs, such as having the ability to reduce heat to maintain comfortable room temperature conditions. Therefore, in this research, a particle board reinforced by pineapple leaf fiber waste and HVS paper waste was developed to know the effect of the particle board reinforcement composition on reducing heat. In this research, a comparison of pineapple leaf fiber waste and HVS paper waste was used at 100%:0%; 70%:30%; 50%:50%; 30%:70%; and 0%:100% with resin adhesive. This particle board is made by mixing all the ingredients and then printing it into a mold and then carrying out the drying process. The test was carried out based on a temperature difference analysis. The most optimum particle board reinforcement composition to reduce heat is 100% pineapple leaf fiber waste : 0% HVS paper waste.
Copyright (c) 2023 Oktavia Oktavia, Diani Lestari, Risna Kirana Rokar, Widodo Budi Kurniawan https://creativecommons.org/licenses/by/4.0
MECHANICAL PROPERTIES OF SUGAR PALM (ARENGA PINNATA) ROPES AND NETS FOR AGRICULTURAL PURPOSES
Sample of Arenga Pinnata (AP) fibres, ropes and nets were prepared from AP ropes using traditional tools. The ropes and nets were used as agricultural material such as vertical farming of vines (passion fruit, grape, bitter gourd, and melon) in Gorontalo and Japan. The combination of nets and vines acts as green curtain (GC) which. Could mitigate the thermal energy in outdoor as well as indoor buildings. and tested with the deformation rate of up to the point of rupture. To avoid the failure of ropes and nets on supporting the weight of the vines, the Universal Testing Machine Model WDW-50 were used to determine the ultimate tensile forces. While the physical size of the AP fibres, ropes and nets also being measured to confirm the uniformity of the individual ropes and nets
Copyright (c) 2023 Mohamad Jahja, Kasim Dihuma, Dewa Gede Eka Setiawan, Tsutomu Yamaguchi, Andi Patiewere Metaragakusuma, Masayuki Sakakibara https://creativecommons.org/licenses/by/4.0
PENGEMBANGAN TES DIAGNOSTIK UNTUK MENGIDENTIFIKASI PEMAHAMAN KONSEP SISWA SMA PADA POKOK BAHASAN GELOMBANG BUNYI
This study aims to develop a diagnostic test for understanding the concept of sound waves and to test the validity and reliability of the test. The research method used is development research with reference to the ADDIE model (Analyzing, Designing, Developing, Implementing, Evaluating). This research was conducted at a senior high school in the city of Bandung involving 30 students as respondents. The stages of developing a diagnostic test include literature study, needs analysis, formulating competencies and indicators, developing test items, expert validation, test trials, reliability analysis, ease of analysis, discriminating power analysis, and item selection. The validity of the diagnostic test for understanding the concept of sound waves was tested using several techniques, such as content validation and construct validation. While the reliability of the diagnostic test was tested using the K-R.20 calculation. The results showed that the developed diagnostic test for understanding the concept of sound waves had good validity and reliability. This test can be used to measure students' understanding of the concept of sound waves and to identify difficulties experienced by students in understanding the concept.
Copyright (c) 2023 I Made Hermanto, Unggul Wahyono, Nurhayati Nurhayati, Lukman Samatowa, Wahyu Muzizat Mohamad https://creativecommons.org/licenses/by/4.0