Spektra: Jurnal Fisika dan Aplikasinya最新文献_第2页

DESIGN A MONITORING SYSTEM OF A SINGLE-PHASE ELECTRICITY METER BASED ON THE INTERNET OF THINGS 设计一种基于物联网的单相电表监控系统

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-12-30 DOI: 10.21009/spektra.073.01

M. Manfaluthy, A. Sunardi, Sinka Wilyanti, A. Jaenul, Endang Mulyana

{"title":"DESIGN A MONITORING SYSTEM OF A SINGLE-PHASE ELECTRICITY METER BASED ON THE INTERNET OF THINGS","authors":"M. Manfaluthy, A. Sunardi, Sinka Wilyanti, A. Jaenul, Endang Mulyana","doi":"10.21009/spektra.073.01","DOIUrl":"https://doi.org/10.21009/spektra.073.01","url":null,"abstract":"This research aims to create systematic monitoring of a single-phase electricity meter that is accompanied by power monitoring features, the amount of electrical energy usage costs and relay control features using internet connections. The design has been carried out using PZEM-004T current and voltage sensors. The microcontrollers have been implemented by using ESP8266. This configuration is to reduce separate micro-controller. The embedded microcontroller and WiFi are made improvements from previous research. This embedded microcontroller is used to send data to the internet through WIFI. This monitoring system can then be accessed using the Cayenne interface. The test results of this tool show that the connection between the microcontroller and the Cayenne application works well through an internet connection. With this tool, users can see real-time data on the use of electrical energy and its cost, as shown in the cayenne dashboard. The voltage sensor test results show an average accuracy is 99.17%. The current sensor testing has an average accuracy rate of 96.9%. On average, the wattage delta between the cayenne dashboard and multimeter measurement is 2.16 watts.","PeriodicalId":117601,"journal":{"name":"Spektra: Jurnal Fisika dan Aplikasinya","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132098911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MAGNETIC FIELD-DEPENDENT ELECTRIC CURRENT ON A PERIODIC POLY(DA)-POLY(DT) DNA MOLECULE STRUCTURE 周期性聚(da)-聚(dt) DNA分子结构上的磁场依赖电流

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-12-30 DOI: 10.21009/spektra.073.05

E. Yudiarsah

引用次数: 0

FABRICATION OF PLASTIC SCINTILLATOR USING POLYSTYRENE MATRIX BASED 聚苯乙烯基塑料闪烁体的制备

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-12-30 DOI: 10.21009/spektra.073.03

H. L. Nuri, M. Pancoko, Abdul Jami, H. Subhiyah, T. Ardiyati, Dian Maya Sari, A. T. Desviana

{"title":"FABRICATION OF PLASTIC SCINTILLATOR USING POLYSTYRENE MATRIX BASED","authors":"H. L. Nuri, M. Pancoko, Abdul Jami, H. Subhiyah, T. Ardiyati, Dian Maya Sari, A. T. Desviana","doi":"10.21009/spektra.073.03","DOIUrl":"https://doi.org/10.21009/spektra.073.03","url":null,"abstract":"Experiments on making a plastic scintillator with polystyrene as a base material mixed with fluorescent compounds (primary and secondary dopants) have been performed. Primary dopants (PTP) used to produce emission at wavelengths of visible light and secondary dopants (POPOP) to shift the visible wavelengths to wavelengths that could be detected by Photomultiplier Tube (PMT) ) were carried out. Experiments were performed on the melting points condition of these materials, which had previously been subjected to a thermo-mechanical analysis using a Thermogravimetric Analysis-Differential Scanning Calorimetry (TGA-DSC) machine, where the melting point was in the range of 200-240°C. Furthermore, the fabrication was carried out using the extrusion technique, where polystyrene pellets mixed with PTP (1.5% by weight) and POPOP (0.05% by weight) were fed into an extrusion machine which has four hot areas to obtain a thin plate plastic scintillator. The plates were then analyzed with a UV-Vis Spectrophotometer to determine the absorption spectrum and Fluorescence Spectrophotometer to determine the emission spectrum. From the results of the analysis, it was found that the samples that went through scintillation pellets and without the addition of antioxidants had absorption spectrum data of 330 nm and emission spectrum of 421 nm. These values are in accordance with the characteristics of plastic scintillators on the market. ","PeriodicalId":117601,"journal":{"name":"Spektra: Jurnal Fisika dan Aplikasinya","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131885055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IMPACT PROFILE OF ENSO AND DIPOLE MODE ON RAINFALL AS ANTICIPATION OF HYDROMETEOROLOGICAL DISASTERS IN THE PROVINCE OF SOUTH SUMATRA enso和偶极子模式对南苏门答腊省水文气象灾害预报降水的影响剖面图

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-12-30 DOI: 10.21009/spektra.073.02

M. Ariska, H. Akhsan, M. Muslim

{"title":"IMPACT PROFILE OF ENSO AND DIPOLE MODE ON RAINFALL AS ANTICIPATION OF HYDROMETEOROLOGICAL DISASTERS IN THE PROVINCE OF SOUTH SUMATRA","authors":"M. Ariska, H. Akhsan, M. Muslim","doi":"10.21009/spektra.073.02","DOIUrl":"https://doi.org/10.21009/spektra.073.02","url":null,"abstract":"El Niño Southern Oscillation (ENSO) is a weather phenomenon in the Pacific Ocean. At the same time, Dipole Mode (DM) is an ocean-atmosphere interaction phenomenon in the Indian Ocean. The area of South Sumatra Province, which is in the Monsunal area, makes the influence of ENSO and DM very instrumental in determining the length of the rainy season and throughout the year. The South Sumatra region is very vulnerable to forest and land fire disasters due to the condition of the area in the form of swamps and peatlands, which are very easy to burn if the dry season occurs in the South Sumatra area. In this study, an analysis of the effect of ENSO and DM on rainfall in the South Sumatra Region from 1981 to 2020 was carried out using a simple linear regression method and the correlation coefficient using Niño 3.4 index data and Dipole Mode with rainfall data and consecutive rainy days data. Consecutive Wet Day (CWD). The purpose of this study was to determine the effect of Enso and Dipole Mode on rainfall and CWD in the South Sumatra Region. The results show that the correlation between ENSO and rainfall is 0.0017-0.002573, DM and rainfall is 0.05972, and ENSO and CWD is -0.068. The correlation between DMI and CWD is 0.513. So it can be said that ENSO and DMI have no effect on rainfall in the South Sumatra Province. Still, the amount of CWD in South Sumatra Province is significantly determined by the Dipole Mode Index (DMI) at a moderate level. The number of consecutive rainy days in South Sumatra Province is influenced by the dynamics of the ocean and atmosphere of the Indian Ocean, which is characterized by the presence of positive IOD and negative IOD phenomena.","PeriodicalId":117601,"journal":{"name":"Spektra: Jurnal Fisika dan Aplikasinya","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125993308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

THE DENSITY FUNCTIONAL THEORY STUDY OF Li-ION DIFFUSION IN Na-DOPED Li4Ti5O12 AS LITHIUM-ION BATTERY ANODE 掺钠锂离子电池负极锂离子扩散的密度泛函理论研究

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-12-30 DOI: 10.21009/spektra.073.04

Achda Fitriah, A. Azhar, Adam B. Cahaya, E. Suprayoga, M. A. Majidi

引用次数: 0

FRONT MATTER SPEKTRA VOLUME 7 ISSUE 2, SEPTEMBER 2022 《前沿物质光谱》第七卷第二期，2022年9月

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-09-30 DOI: 10.21009/spektra.07200

Editor Spektra

引用次数: 0

IMPLEMENTATION OF TRS-398 PROTOCOL IN ROUTINE CALIBRATION OF LINAC BY DETERMINATION OF SLAB PHANTOM ON WATER PHANTOM CORRECTION FACTOR 通过测定板模对水模校正系数，实现trs-398方案在直线机常规校正中的应用

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-09-30 DOI: 10.21009/spektra.072.03

Azizallah Fauzi, Fitrotun Aliyah, Darmawati Darmawati

{"title":"IMPLEMENTATION OF TRS-398 PROTOCOL IN ROUTINE CALIBRATION OF LINAC BY DETERMINATION OF SLAB PHANTOM ON WATER PHANTOM CORRECTION FACTOR","authors":"Azizallah Fauzi, Fitrotun Aliyah, Darmawati Darmawati","doi":"10.21009/spektra.072.03","DOIUrl":"https://doi.org/10.21009/spektra.072.03","url":null,"abstract":"The water phantom is used for LINAC calibration to measure absorbed dose radiation. Practically, it requires a long preparation time and is considered less efficient. To increase efficiency, the medical physics team in a hospital uses slab phantom as the calibration tool. Consequently, the correction factor is crucial to define the equivalence of the absorbed doses resulted from slab phantom. The absorbed dose measurement was performed according to the IAEA TRS-398 dosimetry protocol with a cylindrical ionization chamber detector for 6 MV photon beam and electron beams from Elekta Synergy Platform 154029 LINAC with 6 MeV, 8 MeV, 10 MeV, and 12 MeV energy variations. The field size for slab and water phantom is 30 cm x 30 cm x 30 cm. Based on the TRS-398 protocol, the correction factor of the slab phantom calculated based on absolute dosimetry for 6 MV photons beam, the electron beam of 6 MeV, 8 MeV, 10 MeV, and 12 MeV are 1.0018; 0.9995; 0.9979; 1.0041 and 1.0068, respectively. As a result, the absorbed dose radiation measured by the calibrated slab phantom using the resulted correction factor has an equivalent amount to the water phantom.","PeriodicalId":117601,"journal":{"name":"Spektra: Jurnal Fisika dan Aplikasinya","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125451814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

BIOFILTER MANUFACTURE OF AZADIRACHTA INDICA LEAF POWDER AND ITS EFFECTIVENESS IN CAPTURING FREE RADICALS OF CIGARETTE SMOKE 印楝叶粉末的生物滤池制造及其对香烟烟气中自由基的捕获效果

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-09-30 DOI: 10.21009/spektra.072.01

Agus Mulyono

引用次数: 0

SMART SEAL BASE ON WIFI USING WEB SERVICE PHP 智能印章基于wifi使用web服务PHP

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-09-30 DOI: 10.21009/spektra.072.02

Irawati Dewi Syahwir, S. Suprijanto, Gayuh Tentri, Rayhan Putra Pratama

{"title":"SMART SEAL BASE ON WIFI USING WEB SERVICE PHP","authors":"Irawati Dewi Syahwir, S. Suprijanto, Gayuh Tentri, Rayhan Putra Pratama","doi":"10.21009/spektra.072.02","DOIUrl":"https://doi.org/10.21009/spektra.072.02","url":null,"abstract":"Technological developments, especially in the IoT (Internet of Things), play a significant role in various fields. In addition to achieving a modern and efficient work environment, IoT can also play a role in the security sector, which has now become a significant need. One of the roles of IoT in the security sector is that it can be applied to calibrated TMWE (Measuring, Dosing, Weighing, and Equipment). So that it can guarantee the correctness of the measurement results from the TMWE, continuous monitoring can be carried out so that fraud does not occur. One of the innovations in this regard is the smart seal. The use of smart seals is prioritized for fixed TMWE, which is vulnerable to theft and breaches. This system is designed based on IoT, which is integrated with cloud services and GPS systems that allow the use of web-based applications for online monitoring of seal conditions by users. Data from the seal will be sent to the server via wifi network and stored in a database, to be displayed in web service with a user, admin, and signer access. In addition to providing information to users about the seal’s location, the use of the GPS also aims to make it easier for admins to detect the seal’s location in the event of a violation.","PeriodicalId":117601,"journal":{"name":"Spektra: Jurnal Fisika dan Aplikasinya","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124532368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INTRAVENOUS INFUSION DOSING SYSTEM FOR VOLUME CONTROL BASED ON SIGNAL PERIODIC MEASUREMENT 基于信号周期测量的静脉输液给药量控制系统

Spektra: Jurnal Fisika dan Aplikasinya Pub Date : 2022-09-30 DOI: 10.21009/spektra.072.04

L. Umar, V. A. Rosandi, R. N. Setiadi, Zulharman Zulharman

{"title":"INTRAVENOUS INFUSION DOSING SYSTEM FOR VOLUME CONTROL BASED ON SIGNAL PERIODIC MEASUREMENT","authors":"L. Umar, V. A. Rosandi, R. N. Setiadi, Zulharman Zulharman","doi":"10.21009/spektra.072.04","DOIUrl":"https://doi.org/10.21009/spektra.072.04","url":null,"abstract":"Intravenous fluid therapy is a commonly used treatment modality that is used in the treatment of hospitalized patients. Intravenous flow rates are often controlled by counting the number of fluid drops in a drip chamber while adjusting the intravenous line with a watch. In this research, an intravenous infusion dosing system was designed based on periodic signal measurement using a pair of light couplers consisting of a transmitter and a receiver. The transmitter is built using an infrared LED (BPV10NF), while the receiver uses an infrared photodiode detector (BPW34). The infusion droplet will pass a slit between the two coupler components and interrupt the light transmission from the transmitter to the receiver, which will affect the current through the photodiode and change the output status of the circuits. The parameters obtained from this circuit signal are droplet frequency from 1 Hz to 10 Hz and droplet sizes 0.05 ml and 0.0167 ml. The resulting output signal is in the form of pulses due to the interruption of the droplet when it passes through the optocoupler. The droplet frequency is calculated based on the period between adjacent droplets, while the droplet size can be measured based on the width of the resulting pulse. For the droplet measurement process, variations of the droplet period and the number of droplets per ml were carried out. The droplet period is regulated by manually adjusting the aperture of the infusion droplet outlet faucet. In contrast, the droplet size is controlled by two types of infusion devices with 20 drops/ml and 60 drops/ml specifications. The experimental results can be used to develop a system response that detects changes in period and droplet size.","PeriodicalId":117601,"journal":{"name":"Spektra: Jurnal Fisika dan Aplikasinya","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130389339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1