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INDONESIA
Sci-Tech Journal
Published by Masyarakat Ekonomi Syariah Bogor
ISSN : -     EISSN : 28306759     DOI : 10.56709
Core Subject : Health, Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Computer Science & IT Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Public Health
Sci-Tech Journal is a peer-reviewed national journal published by Masyarakat Ekonomi Syariah (MES) Bogor in collaboration with Institut Agama Islam Nasional (IAI-N) Laa Roiba Bogor, Ikatan Ahli Ekonomi Islam (IAEI), and Intelectual Association for Islamic Studies (IAFORIS) . This journal contains scientific papers from academics, researchers and practitioners in the fields of sciences, technology, information, bioindustry, and business research. E-ISSN 2830-6759
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 105 Documents
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Uji Performansi Jangkauan Jarak Komunikasi LoRa Reyax RYLR890 Andika, Adik Putra; Muriani, Muriani; Rusdi, Muhamad
Sci-tech Journal Vol. 5 No. 1 (2026): Sci-Tech Journal (STJ)
Publisher : MES Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56709/stj.v5i1.1017

Abstract

One of the challenges of IoT applications is how to control devices remotely without using the internet. Therefore, one of the wireless technologies suitable for IoT applications is LoRa. This study aims to analyze the communication range performance of the LoRa Reyax RYLR890. The research method is experimental. The testing/measurement circuit was designed into two circuits: a transmitter circuit and a receiver circuit. In the receiver circuit, colored LEDs were added to provide information on whether they are on or off when receiving signals from the transmitter. The results of the communication range measurement of LoRa show that the maximum communication distance between the two LoRa Reyax RYLR890 modules is 1000 meters/1 kilometer. However, the most suitable location for developing the LoRa Reyax RYLR890 is an area like an airport runway, with an RSSI value of -104 dBm and an SNR value of 31 dB. This is due to the wide, long, and unobstructed geographical conditions of the area. Although the communication signal strength is considered weak/poor, the signal is clean/does not have much noise/interference, making it more stable.
Evaluasi Penerapan Konsep Bangunan Hijau Berdasarkan Peraturan yang Berlaku pada Sebuah Bangunan Gedung Perkantoran di Kawasan Industri Jakarta Timur Aji Nagoro, Gurid; Widjajanti, Endang; Hendra Padangalam, Johannes
Sci-tech Journal Vol. 5 No. 1 (2026): Sci-Tech Journal (STJ)
Publisher : MES Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56709/stj.v5i1.1058

Abstract

This thesis presents measurements related to the application of green building concepts to an office building in East Jakarta. The measurement results obtained are then used to determine the building's rating criteria against applicable regulations. The green building concept is a building concept that is designed, constructed, and operated with consideration for its impact on the environment and human health, as well as aiming to conserve energy. Regulations regarding green buildings in Indonesia are currently issued by the Green Building Council Indonesia (GBCI), the Ministry of Public Works and Public Housing, regional governor regulations in several regions, and technical guidelines from several other ministries. Green building measurements can be made in three stages, namely the design stage, the built condition stage, and the operation stage. The research was conducted through a case study of an office building in East Jakarta. The research resulted in a green building rating based on a review of GBCI V.12 regulations and PUPR Regulation No. 21 of 2021, as well as the amount of electricity and water savings that can be achieved based on the baseline from the Roadmap for the Implementation and Development of Green Buildings (2023). This building received 59 points out of 101 under the GBCI V.12 regulations and was categorized as gold. In the review of the Minister of Public Works and Public Housing Regulation, it scored 125 out of 165 points and falls into the medium green building category. With this implementation, electricity energy efficiency of 29.737% can be achieved, water savings of 12.63% based on the PUPR baseline standard, and a reduction in carbon emissions of 956,457.904 kg CO2e.
Metode Studi Kasus Robert K. Yin dalam Penelitian Arsitektur Hamdi Asysyauki, Akhmad; Rianto Widjaja, Robert
Sci-tech Journal Vol. 5 No. 1 (2026): Sci-Tech Journal (STJ)
Publisher : MES Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56709/stj.v5i1.1078

Abstract

A case study is a research method used to investigate complex and contextual phenomena in real-life settings. Case studies aim to understand a specific case in depth and comprehensively by considering various influencing factors. The method used in this research is a literature review or reference study to gain knowledge about the case study method formulated by Robert K. Yin. The purpose of this research is to analyze the case study research method formulated by Robert K. Yin in architectural research. Robert K. Yin's case study method can be widely used in research in the social sciences and other fields. The main characteristics of this case study are its focus on a single or multiple cases studied in real life, its ability to explain causal relationships by developing theory in the research design phase that relies on sources of evidence, and its ability to produce theoretical generalizations. In architectural research, Robert K. Yin's case study method can be applied, albeit partially, and can be combined with other methods.
Pengaruh Kombinasi Slow Deep Breathing, Dzikir, dan Aromaterapi Lavender terhadap Tekanan Darah pada Lansia Hipertensi di Padukuhan Kalipakis Arif, Nadya Maulida; Noviani, Wulan
Sci-tech Journal Vol. 5 No. 1 (2026): Sci-Tech Journal (STJ)
Publisher : MES Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56709/stj.v5i1.1121

Abstract

Hypertension poses a significant threat for heart-related issues in older adults. Managing this condition without medication through methods like relaxation techniques, spiritual practices, and the use of essential oils is crucial. This research aimed to explore the impact of a combination of the slow deep breathing exercise (4-7-8 method), the recitation of “Astaghfirullah,” and lavender essential oil treatment on blood pressure levels. The case study focused on two senior women, Mrs. P (60 years old) and Mrs. S (61 years old), residing in Padukuhan Kalipakis. The treatment was administered daily for a duration of 15 to 30 minutes over a span of three days. Findings indicated a notable reduction in blood pressure. In the case of Mrs. P, her blood pressure dropped from 168/93 mmHg to 138/85 mmHg, while Mrs. S experienced a decrease from 141/79 mmHg to 110/66 mmHg. The combination of physiological, psychological, and spiritual elements through this integrated approach proves to be effective in lowering blood pressure among elderly individuals and may serve as an additional nursing strategy.
Analisis Respon Dinamis dan Distorsi Harmonisa pada Inverter NPC Satu Fasa Menggunakan Multicarrier PWM I Ketut Wiryajati; Ida Ayu Sri Adnyani; I Ketut Perdana Putra; I G A K Chatur Adhi Wirya Aryadi
Sci-tech Journal Vol. 5 No. 1 (2026): Sci-Tech Journal (STJ)
Publisher : MES Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56709/stj.v5i1.1160

Abstract

This study presents the performance analysis of a single-phase Neutral Point Clamped (NPC) inverter using the multicarrier pulse width modulation (PWM) technique based on MATLAB/Simulink simulation. The inverter system employs eight semiconductor switches controlled through multilevel PWM modulation to produce an AC output waveform close to sinusoidal characteristics. Performance evaluation was conducted through statistical analysis of output voltage and current, transient response, dynamic response, and harmonic distortion analysis. The simulation results show that the inverter produces relatively stable voltage and current waveforms with symmetrical characteristics between positive and negative cycles. The output voltage achieved a maximum value of 45.86 V with an RMS value of 31.02 V. The system also demonstrated a relatively fast dynamic response with rise time and fall time values of 3.768 ms. However, FFT analysis indicated that the Total Harmonic Distortion (THD) remained relatively high at 42.93%. Therefore, optimization of switching frequency, control methods, and LC filter design is required to improve power quality performance.

Page 11 of 11 | Total Record : 105

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