Buletin Fisika最新文献_第5页

Effect of Variation Substitution of Nd and Eu on the Crystal Structure of Y-124 Superconductor (Y1-x-yNdxEuyBa2Cu4O8??) Nd和Eu的变化取代对Y-124超导体(Y1-x-yNdxEuyBa2Cu4O8??)晶体结构的影响

Buletin Fisika Pub Date : 2021-08-29 DOI: 10.24843/bf.2022.v23.i02.p06

Laura Laudensia Senly Jalut, W. Suharta, Windaryoto Windaryoto

{"title":"Effect of Variation Substitution of Nd and Eu on the Crystal Structure of Y-124 Superconductor (Y1-x-yNdxEuyBa2Cu4O8??)","authors":"Laura Laudensia Senly Jalut, W. Suharta, Windaryoto Windaryoto","doi":"10.24843/bf.2022.v23.i02.p06","DOIUrl":"https://doi.org/10.24843/bf.2022.v23.i02.p06","url":null,"abstract":"In this study, the substitution of elements Nd and Eu on the superconductor Y1-x-yNdxEuyBa2Cu4O8?? (Y-124) has been carried out using compounds Y2O3, BaCO3, CuO, Nd2O3 and Eu2O3 with molar variations of Nd (x) and Eu (y), respectively. 0, 0,05, 0,1, 0,15 and 0,2 respectively to determine the effect of Nd and Eu substitution on the volume fraction and crystal structure of the superconducting Y-124. Samples were synthesized using wet mixing method with HNO3 as solvent, followed by calcination process at 600 oC for 3 hours and sintering process at 900 oC for 10 hours. Analysis of the structure of the superconducting Y-124 was carried out by characterizing X-ray Diffraction (XRD) and Fourier-Transform Infrared Spectroscopy (FTIR). The results of XRD characterization showed a fine and sharp spectrum which indicated that crystallization had occurred completely. The resulting spectrum was dominated by the Y-124 phase and a small percentage of the impurities were detected. Substitution of Nd and Eu elements resulted in volume fractions of 82,7 %, 83,6 %, 84,4 %, 87,0 % and 85,9 %, respectively. The volume fraction value increased with the addition of Nd and Eu from 0 to 0,15, then decreased at 0,2. This indicates that the optimization of the addition of Nd and Eu is at a value of 0,15 in the molar ratio of compounds. The substitution of Nd and Eu elements also causes changes in the lattice parameters towards the a-axis with values between 3,7549 and 3,8323 , towards the b-axis with values between 3,8094 and 3,8425 , and towards the c-axis with values between 26,7390 and 26,8970. The FTIR results show the presence of an absorption band in the YBCO region, but the sample still contains impurities which are indicated to come from BaCO3 and HNO3.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44657904","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

Validation of Daily Rainfall Based on Global Satellite Mapping Of Precipitation (Gsmap) Data with Observation Data in The Bali Region 基于Gsmap全球降水卫星制图(Gsmap)数据与巴厘地区观测数据的日降雨量验证

Buletin Fisika Pub Date : 2021-08-28 DOI: 10.24843/bf.2022.v23.i02.p05

I. G. A. M. Duwanda, I. K. Sukarasa

引用次数: 1

Analysis Regional Vulnerability of Earthquakes Based on Parameters Fragility Rock Value (B-Value) and Peak Ground Acceleration (PGA) In Bali Province 基于参数脆性岩石值（B值）和峰值地面加速度（PGA）的巴厘省地震区域脆弱性分析

Buletin Fisika Pub Date : 2021-08-25 DOI: 10.24843/bf.2022.v23.i02.p04

Amalia Lestari, K. N. Suarbawa, I. Supardi, I. P. D. Pratama

{"title":"Analysis Regional Vulnerability of Earthquakes Based on Parameters Fragility Rock Value (B-Value) and Peak Ground Acceleration (PGA) In Bali Province","authors":"Amalia Lestari, K. N. Suarbawa, I. Supardi, I. P. D. Pratama","doi":"10.24843/bf.2022.v23.i02.p04","DOIUrl":"https://doi.org/10.24843/bf.2022.v23.i02.p04","url":null,"abstract":"Abstract - Bali is an area that is prone to earthquake hazards. This is because Bali is flanked by two causes of earthquakes, namely a subduction zone in the south and a back arc fault in the north. One of the efforts to minimize damage or loss caused by earthquakes is to analyze the vulnerability of an area to earthquakes. In this study, the earthquake parameters used as hazard indicators were the level of rock fragility (b-value) and maximum ground acceleration (PGA). Based on the results of the b-value calculation using the Maximum Likelihood method, the rock fragility level for the Bali region is obtained from 0.370 to 1.419. While the results of the PGA calculation using two empirical methods, namely the empirical M.V. Mickey and Lin Wu's empirical method is known that the empirical method of M.V. Mickey is more suitable for use in the Bali area than Lin Wu's empirical method, with PGA values ??ranging from 517.32-828.58 gal. So based on the results of the analysis of the two earthquake parameters, it is found that the area of ??Bali that is vulnerable to earthquakes is the western part of Buleleng Regency and most of Jembrana Regency. \u0000Keywords: b-value, PGA, Maximum Likelihood, M.V. Mickey, Lin Wu, Bali","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49293141","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

Identification of Electrical Properties of Bio-battery based on Spent Coffee Grounds 基于废咖啡渣的生物电池电性能鉴定

Buletin Fisika Pub Date : 2021-08-23 DOI: 10.24843/bf.2022.v23.i02.p03

I. Pawarangan, Wilson Jefriyanto

引用次数: 2

A Study on Radial Properties of Hydrogenic Ions using Laguerre Polynomials 用Laguerre多项式研究氢离子的径向性质

Buletin Fisika Pub Date : 2021-08-16 DOI: 10.24843/bf.2022.v23.i02.p01

Gerda Pandu, R. Pingak, Albert Zicko Johannes, Zakarias Seba Ngara

引用次数: 0

Analisis Hasil FTIR Dari Buah Kedondong dan Labu, Ubi Jalar dan Wortel Sebagai Bahan Alternatif Dye Sensitized Solar Cell (DSSC) Dengan Metode Multivariat 用多元方法分析Kedondong和Labu、Ubi Jalar和Wortel作为替代物质的染料敏化太阳能电池（DSSC）的FTIR结果

Buletin Fisika Pub Date : 2021-08-16 DOI: 10.24843/bf.2022.v23.i02.p02

Engelia Rambu Maramba Meha, Windarjoto Windarjoto, Hery Suyanto

引用次数: 0

Pemodelan 3D Struktur Bawah Permukaan Gunung Anak Ranakah dan Sekitarnya Menggunakan Metode Gravitasi 3D建模山及其周围环境的结构使用重力方法

Buletin Fisika Pub Date : 2021-08-01 DOI: 10.24843/bf.2022.v23.i01.p09

Desiderius Jarut, I. K. Sukarasa, I. B. Alit Paramarta

{"title":"Pemodelan 3D Struktur Bawah Permukaan Gunung Anak Ranakah dan Sekitarnya Menggunakan Metode Gravitasi","authors":"Desiderius Jarut, I. K. Sukarasa, I. B. Alit Paramarta","doi":"10.24843/bf.2022.v23.i01.p09","DOIUrl":"https://doi.org/10.24843/bf.2022.v23.i01.p09","url":null,"abstract":"Telah dilakukan penelitian pemodelan 3D struktur bawah permukaan Gunung Anak Ranakah dan sekitarnya. Penelitian ini bertujuan untuk membuat peta serta menentukan nilai anomali bouguer lengkap, anomali regional, anomali residual, nilai densitas bawah permukaan serta membuat model 3D struktur bawah permukaan. Data yang digunakan merupakan data sekunder yaitu data anomali gravitasi satelit yang diperoleh dari website Topex. Pengolahan data dalam penelitian ini menggunakan metode gravitasi. Pada metode ini akan dilakukan koreksi gravitasi, membuat peta anomali bouguer lengkap, melakukan analisis spektrum, melakukan pemisahan anomali regional dan residual menggunakan filter butterworth serta melakukan inverse modelling dengan menggunakan software ZondGM3D untuk membuat model 3D struktur bawah permukaan. Hasil peta anomali bouguer lengkap menunjukkan nilai anomali daerah penelitian antara 134,6-209,3 mGal, anomali regional 147,4-205,9 mGal dan anomali residual antara (-12,8)-11,0 mGal. Hasil inverse modelling menunjukkan bahwa struktur geologi bawah permukaan Gunung Anak Ranakah dan sekitarnya memiliki rentang densitas antara 1,2-3,0 g/cm3, sehingga dari rentang nilai densitas batuan dapat diperkirakan struktur geologi bawah permukaan Anak Gunung Ranakah dan sekitarnya terdiri dari batuan soil (1,2-2,3 g/cm3 , andesit 2,40-2,80 g/cm3) dan basalt (2,70-3,0 g/cm3).","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47818815","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

Analysis of Electrical Energy Consumption Control System in A-205 JTE PNB Lecture Building Based on Bidirectional Visitor Counter 基于双向访客计数器的A-205 JTE PNB报告楼电气能耗控制系统分析

Buletin Fisika Pub Date : 2021-07-26 DOI: 10.24843/bf.2022.v23.i01.p08

I. M. Sumerta Yasa, I. Teresna, I. W. Raka Ardana

{"title":"Analysis of Electrical Energy Consumption Control System in A-205 JTE PNB Lecture Building Based on Bidirectional Visitor Counter","authors":"I. M. Sumerta Yasa, I. Teresna, I. W. Raka Ardana","doi":"10.24843/bf.2022.v23.i01.p08","DOIUrl":"https://doi.org/10.24843/bf.2022.v23.i01.p08","url":null,"abstract":"Electrical energy is needed in the A-205 JTE PNB lecture building during the teaching and learning process (PBM). The use of electrical energy includes lighting, Air Conditioning (AC), computers, laptops and LCD projectors. The dominant use of electrical energy is about 8 hours a day. The regulation of electrical energy requires high skilled human resources in making effective use of electrical energy, activating energy-saving behaviors or cultures such as turning off air conditioning and lighting after use. Other efforts are to increase the efficiency of the use of electrical energy, improve the power factor, and replace equipment such as more efficient lighting, more efficient air conditioners. In addition, it can also be done with a tool in the form of a bidirectional visitor counter-based electrical energy control system by installing the control system in each classroom. This control system functions on the use of electrical energy, namely when the classroom is used (there are students/people) the control system works to connect the electric current to the load. On the other hand, when the classroom is not used (there are no students/persons) the control system does not work (does not connect) the electric current to the load. It was found that the use of the control system in the A-205 JTE PNB classroom can save electrical energy by 0.6935 kWh, which is a percentage saving of 23%. This means that the control system based on the bidirectional visitor counter used in the A-205 classroom is more effective in regulating the use of electrical energy so that it can save electrical energy.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48137756","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

Pengenalan Pola Reflektansi Spektral Mangrove Di Teluk Benoa Sebagai Indikator Perubahan Kerapatan Berbasis Citra Landsat 8 贝诺瓦湾反射红树林模式，以陆地卫星图像密度8为指标

Buletin Fisika Pub Date : 2021-07-25 DOI: 10.24843/bf.2022.v23.i01.p07

Wiwik Kurniawati, I. M. Yuliara, N. N. Ratini, Windarjoto Windarjoto

{"title":"Pengenalan Pola Reflektansi Spektral Mangrove Di Teluk Benoa Sebagai Indikator Perubahan Kerapatan Berbasis Citra Landsat 8","authors":"Wiwik Kurniawati, I. M. Yuliara, N. N. Ratini, Windarjoto Windarjoto","doi":"10.24843/bf.2022.v23.i01.p07","DOIUrl":"https://doi.org/10.24843/bf.2022.v23.i01.p07","url":null,"abstract":"Telah dilakukan studi mengenai pengenalan pola reflektansi spektral sebagai indikator perubahan distribusi kerapatan mangrove menggunakan data time series citra Landsat 8, di daerah kawasan Teluk Benoa, Bali. Tujuan penelitian ini adalah untuk mengetahui distribusi kerapatan dan luas areal mangrove dari pola reflektansi spektralnya. Metode dan analisis menggunakan reflektansi spektral dan indeks vegetasi Normalized Difference Vegetation Index (NDVI). Hasil penentuan nilai reflektansi spectral menunjukkan bahwa, perubahan pola reflektansi spektral mangrove di Teluk Benoa dari tahun 2017-2020 mengalami penurunan dan kenaikan untuk setiap band-nya. Pola reflektansi band 5 dapat digunakan sebagai acuan terhadap pengurangan luasan areal mangrove, dimana semakin kecil nilai reflektansi pada band 5 dari tahun 2017-2020 menunjukkan pengurangan atau perubahan kerapatan mangrove di tahun tersebut semakin besar. Berdasarkan data sebaran citra indeks vegetasi NDVI pada tahun 2017-2020 diperoleh tutupan luas per kategori dimana terdapat pengurangan luas areal mangrove dari tahun 2017 hingga 2018 sebesar 36,72 ha, akan tetapi pada tahun 2019 luasan areal mangrove mengalami peningkatan yang cukup besar dari tahun 2018 yaitu sebesar 60,82 ha. Pada tahun 2020 luasan areal mangrove kembali mengalami pengurangan yang cukup drastis yaitu sebesar 181,51 ha. Luasan areal yang tercatat masih ditumbuhi mangrove pada tahun 2020 yaitu hanya sebesar 852,39 ha.","PeriodicalId":32375,"journal":{"name":"Buletin Fisika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46452128","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

Pemetaan Tingkat Bahaya Bencana Gempabumi Di Wilayah Banyuwangi Berdasarkan Percepatan Tanah Maksimum

Buletin Fisika Pub Date : 2021-07-08 DOI: 10.24843/bf.2022.v23.i01.p06

M. Ghofur, I. K. Sukarasa, Rudy Darsono

引用次数: 0