Journal of Physics and Its Applications最新文献

Effectiveness of Noise Barriers Based on Waste Materials in Case Study of Residential Noise Due to Double-Track Railways 基于废料的噪声屏障在双轨铁路住宅噪声案例研究中的有效性

Journal of Physics and Its Applications Pub Date : 2023-11-27 DOI: 10.14710/jpa.v6i1.19992

Denisa Eka Febrianti, Alfi Tranggono Agus Salim, W. Rezika, Muhamad Azwar Annas, S. Suyatno

{"title":"Effectiveness of Noise Barriers Based on Waste Materials in Case Study of Residential Noise Due to Double-Track Railways","authors":"Denisa Eka Febrianti, Alfi Tranggono Agus Salim, W. Rezika, Muhamad Azwar Annas, S. Suyatno","doi":"10.14710/jpa.v6i1.19992","DOIUrl":"https://doi.org/10.14710/jpa.v6i1.19992","url":null,"abstract":"The noise pollution in residential areas adjacent to double-track railways can significantly disturb the comfort and well-being of residents. The noise originates from passing trains on these double-track railways. The research problem aims to compare the noise levels in the residential area with the standard noise threshold and evaluate the effectiveness of a noise barriers based on waste material called sustainable noise barrier. The effectiveness of reducing noise levels for communities residing near the dual railway lines. The sustainable noise barrier is constructed using waste cardboard and sawdust as sound absorbers for reducing noise from passing trains. The objective of the research is to analyze the noise levels in the residential areas near the dual railway lines, referring to the noise threshold value specified in Kep.MenLH No.48 of 1996, which is 55 dBA. Additionally, the research aims to assess the effectiveness of the sustainable noise barrier in mitigating noise pollution in these residential areas. The research employs a quantitative experimental method, following the SNI 8427 of 2017 standard for measuring residential noise pollution and determining the sustainable noise barrier's effectiveness using Insertion Loss (IL) and Sound Transmission Loss (STL) measurements in both laboratory-scale and existing conditions (alongside the double-track railways). The research findings indicate that the noise levels in residential areas adjacent to dual railway lines exceed the threshold value, reaching 78.08 dBA. However, the sustainable noise barrier proves to be effective in reducing noise pollution by 27 dB at a frequency of 1,000 Hz in the residential areas neighboring the double-track railways. This research suggests that limiting noise disturbances in residental areas bordering railway lines is one solution with noise barriers.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139232662","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

Comparison of Percentage Depth Doses with the Published Data for Co-60 Radiotherapy Machine at a Regional Cancer Hospital 某地区癌症医院 Co-60 放射治疗机的深度剂量百分比与已公布数据的比较

Journal of Physics and Its Applications Pub Date : 2023-11-27 DOI: 10.14710/jpa.v6i1.20537

Javaid Ali, Muhammd Sohail, Abdul Samad, Israr Ahmad, Hafeezullah Soomro, Ghufran Biradar, Irum Naz, Imadullah Tariq

{"title":"Comparison of Percentage Depth Doses with the Published Data for Co-60 Radiotherapy Machine at a Regional Cancer Hospital","authors":"Javaid Ali, Muhammd Sohail, Abdul Samad, Israr Ahmad, Hafeezullah Soomro, Ghufran Biradar, Irum Naz, Imadullah Tariq","doi":"10.14710/jpa.v6i1.20537","DOIUrl":"https://doi.org/10.14710/jpa.v6i1.20537","url":null,"abstract":"In external beam radiation therapy, the percentage depth dose (PDD) is a main factor for estimation of patient’s dose and dose distribution in target volume, therefore its accurate estimation is important. The purpose of this article is to compare PDDs with the published PDDs of different authors along central axis at different depths and field sizes for cobalt-60 (Co-60) radiotherapy machine at a regional cancer hospital Pakistan. A dedicated water phantom was used for estimation of PDDs at different depths and different field sizes, for Theratron phoenix Co-60 machine. It was observed that for 10×10 cm2 filed size of Co-60 beam mean percent variation in measured PDDs and published PDDs by different authors was -0.29% to 1.13%, which was within acceptable limit of ± 2%. However, for one author who used semi-empirical equation for PDDs calculation, the mean percent variation between measured PDDs and that of the author was -3.23%, 4.69% and 5.88% for 10×10 cm2, 25×25 cm2 and 30×30 cm2 field sizes of Co-60 beam respectively, which were within acceptable limit of ±10%. A noticeable increase in PDDs was observed with increase of the field size at given depth which shows obvious contribution of secondary scattered radiation. Also measured PDDs were well matched with that of published PDDs of most of the authors i.e. ± 2%, but the measured PDDs were moderately matched with that of PDDs for only one author for some field sizes and some depths i.e. ±10%, which need to be rectified by taking more such data.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139232396","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

Development of Sasirangan Liquid Waste Treatment System Using Ozonization Method Using Composite Ceramic Filter Media Based on Water Chestnut (Eleocharis Dulcis) 利用基于马蹄（Eleocharis Dulcis）的复合陶瓷滤料，采用臭氧法开发 Sasirangan 液体废物处理系统

Journal of Physics and Its Applications Pub Date : 2023-11-27 DOI: 10.14710/jpa.v6i1.20582

Raida Salsabila Khalis, Margareta Margareta, Hasbullah Hasbullah, Eka Suarso, Syifa Fitriana, Ulya Farisa

{"title":"Development of Sasirangan Liquid Waste Treatment System Using Ozonization Method Using Composite Ceramic Filter Media Based on Water Chestnut (Eleocharis Dulcis)","authors":"Raida Salsabila Khalis, Margareta Margareta, Hasbullah Hasbullah, Eka Suarso, Syifa Fitriana, Ulya Farisa","doi":"10.14710/jpa.v6i1.20582","DOIUrl":"https://doi.org/10.14710/jpa.v6i1.20582","url":null,"abstract":"Sasirangan Liquid Waste (SLW) contains heavy metals and chemicals with BOD and COD concentrations exceeding the waste water quality standards in accordance with the Minister of Environment and Forestry Regulation Number P.16 of 2019. The aim of this research is to design and develop a SLW processing system using filter media and composite ceramics made from water chestnut (Eleocharis dulcis). Based on previous research, using the filtration method; filtration and adsorption; filtration, adsorption, sedimentation and ozonization. Filtration method can remove solid particles and sediment from water, so the water appears clearer. The water purification process that involves a filtration method using slow sand filter (SSF), which additional processes are needed either before or after the SSF is carried out. Meanwhile, the use of water chestnut has been carried out by several researchers due to its high active carbon content, namely 50.68%. In this research, we combine several methods including filtration, sedimentation, and ozonization. Water chestnut has a bound carbon content of 84.53% after being activated with an H2SO4 activator, where the largest porosity is found in ceramics with activated charcoal composite materials with variations of the H2SO4 activator. Apart from that, chestnut also has a cellulose content of 35.32% so it has the potential to be effective as a ceramic composite material in sasirangan liquid waste processing filters, especially as an adsorbent. The benefits obtained from the results of this research can be a scientific reference for the use of water chestnut as a filter media and composite ceramic.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139234588","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

Optical Response of Various Heavy Metal Ions-Based Carbon Dots Photoluminescent Quenching Effect 各种重金属离子基碳点光致发光淬灭效应的光学响应

Journal of Physics and Its Applications Pub Date : 2023-11-13 DOI: 10.14710/jpa.v6i1.18755

I. T. Sugiarto, Nursidik Yulianto, W. P. Tresna, I. Lewa, Isnaeni Isnaeni

{"title":"Optical Response of Various Heavy Metal Ions-Based Carbon Dots Photoluminescent Quenching Effect","authors":"I. T. Sugiarto, Nursidik Yulianto, W. P. Tresna, I. Lewa, Isnaeni Isnaeni","doi":"10.14710/jpa.v6i1.18755","DOIUrl":"https://doi.org/10.14710/jpa.v6i1.18755","url":null,"abstract":"Carbon nanodots (Cdots) are a type of semiconductor carbon-based nanomaterial that is gaining popularity due to its excellent characteristics (e.g., biocompatibility, unique optical properties, low cost, eco-friendly, and high stability). In terms of physicochemical properties for an environmentally friendly sensor application, this material also has an excellent ability to detect heavy metal ions in the biosphere. In this study, we proposed a comprehensive optical characterization to examine the sensitivity of the Cdots probe for three heavy metal ions (i.e., Mn, Pb, and Cr ions) and compare the performance. The results of the experiment revealed that each heavy metal ion reacted differently to the physical properties of Cdots. With the addition of Cr, Mn, and Pb metal ions from the original Cdot solution, which is only 1.45 ns, the lifetime of quenched Cdots is 2.55 ns, 3.15 ns, and 2.15 ns, respectively, according to the TRPL experiments. With additional Cr, Mn, and Pb discovered, the intensity of PL dropped by 5.7%, 14.2%, and 21.4%, respectively. Among these various heavy metal ions, Pb ions show the most affected by the quenching effect in Cdots-based photoluminescence, FTIR, and ultraviolet-visible light absorption characterization. Based on the results of three heavy metal ion experiments, this study can be implemented as the heavy metal ion sensor-based luminescence quenching effect of Cdots.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"314 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139278534","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

Analysis of Clay Mineral Transformation in Plambik Village, Central Lombok Using X-Ray Diffraction and Scanning Electron Microscope Methods 利用 X 射线衍射和扫描电子显微镜方法分析龙目岛中部 Plambik 村的粘土矿物转化情况

Journal of Physics and Its Applications Pub Date : 2023-10-11 DOI: 10.14710/jpa.v6i1.19011

Totok Nugroho, Bambang Prajoko, G. Suryawan, Wayan Sukadana

{"title":"Analysis of Clay Mineral Transformation in Plambik Village, Central Lombok Using X-Ray Diffraction and Scanning Electron Microscope Methods","authors":"Totok Nugroho, Bambang Prajoko, G. Suryawan, Wayan Sukadana","doi":"10.14710/jpa.v6i1.19011","DOIUrl":"https://doi.org/10.14710/jpa.v6i1.19011","url":null,"abstract":"Analysis of minerals and microfabric changes during the burning process of clay in Plambik village, Central Lombok has been carried out using 2 methods: X-Ray Diffraction and Scanning Electron Microscope. A brick of dimension (10 x 20 x 5) mm was prepared which was formed through a gypsum mould. After drying it is burned using an electric furnace with temperatures: 800oC, 1000oC and 1100oC. The results show that using the X-ray diffraction method when burned at 800oC there are quartz minerals with several illite peaks, at 1000oC there is only quartz, the illite peaks disappear while at 1100oC the quartz mineral peaks remain accompanied by the appearance of mullit peaks. Then the effect of the firing temperature on the clay microfabric was analyzed by observing the sample with a Scanning Electron Microscope. This test aims to obtain information about the changes in structure and texture that develop during the combustion process and more specifically on the morphology of the particles and their interaction with the development of the vitrification process and the distribution of the shape and size of the pores. The results showed that before burning, the kaolinite and illite particles were randomly distributed with porous aggregates and the grain size was between 1 – 5 microns. During firing at 800oC some parts have undergone melting and welding phases with the development of secondary porosity. Meanwhile, when burning with a temperature of 1100oC, it appears that the welding and smelting processes that occur are wider and the emergence of mullite crystals from the glass matrix.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"184 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139320521","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

Optimization of Energy for Proton Therapy with Pencil Beam Collimator Model in Craniopharyngioma Tumor Using MCNP6 Code 利用 MCNP6 代码优化采用铅笔束准直器模型的颅咽管瘤质子治疗能量

Journal of Physics and Its Applications Pub Date : 2023-10-09 DOI: 10.14710/jpa.v6i1.18100

Weni Antari Putri, R. Riyatun, D. Darmanto, S. Suharyana, Fajar Arianto

引用次数: 0

Terahertz Quasi-Time Domain Spectroscopy using a 808nm multimode diode laser 使用808nm多模二极管激光器的太赫兹准时域光谱

Journal of Physics and Its Applications Pub Date : 2023-05-25 DOI: 10.14710/jpa.v5i2.17945

I. C. Verona, A. De los Reyes, H. Bardolaza, E. Estacio

引用次数: 0

A method for quantification of noise non-uniformity in computed tomography images: A computational study 计算机断层扫描图像中噪声非均匀性的量化方法:计算研究

Journal of Physics and Its Applications Pub Date : 2023-05-22 DOI: 10.14710/jpa.v5i2.17615

C. Anam, A. Naufal, K. Matsubara, Tosgioh Fujibuchi, G. Dougherty

{"title":"A method for quantification of noise non-uniformity in computed tomography images: A computational study","authors":"C. Anam, A. Naufal, K. Matsubara, Tosgioh Fujibuchi, G. Dougherty","doi":"10.14710/jpa.v5i2.17615","DOIUrl":"https://doi.org/10.14710/jpa.v5i2.17615","url":null,"abstract":"In computed tomography (CT), the noise is sometimes non-uniform, i.e. the noise magnitude may vary with the gradient level within the image. The purpose of this study was to quantify the noise non-uniformity in CT images using appropriate 1D and 2D computational phantoms, and to validate the effectiveness of the proposed concept in images filtered by the bilateral filter (BF), as an example of a non-linear filter. We first developed 1D and 2D computational phantoms, and Gaussian noises with several noise levels were then added to the phantoms. In addition, to simulate the real form of noise from images obtained in a real CT scanner, a homogeneous water phantom image was used. These noise levels were referred to as ground truth noise (σG). The phantoms were then filtered by the bilateral filter with various pixel value spreads (σ) to produce non-uniform noise. The original gradient phantoms (G) were subtracted from both the noisy phantoms (IN) and the filtered noisy phantoms (IBF), and the magnitudes of the resulting noise for each gradient were computed. The noise-gradient dependency (NGD) curve was used to display the dependency of noise magnitude on image gradient in the non-uniform noise. It is found that for uniform noise, the magnitude of noise was constant for all gradients. However, for non-uniform noise, the measured noise was dependent on the gradient levels and on the strength of the BF for every ground truth noise (σG). It was found that the noise magnitude was large for the large gradients and decreased with the magnitude of the image gradient.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115582224","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

Coupling Efficiency of a Spot Size Converter for Optical Fiber-Chip Connections 用于光纤芯片连接的光斑尺寸转换器的耦合效率

Journal of Physics and Its Applications Pub Date : 2023-05-20 DOI: 10.14710/jpa.v5i2.17980

W. P. Tresna, Dedi Riana, Reza Septiawan

引用次数: 0

The Orbital Properties of Black Holes: Exploring the Relationship between Orbital Velocity and Distance 黑洞的轨道特性:探索轨道速度与距离的关系

Journal of Physics and Its Applications Pub Date : 2023-05-14 DOI: 10.14710/jpa.v5i2.17860

Ruben Cornelius Siagian, L. Alfaris, Aldi Cahya Muhammad, Ukta Indra Nyuswantoro, G. T. Rancak

{"title":"The Orbital Properties of Black Holes: Exploring the Relationship between Orbital Velocity and Distance","authors":"Ruben Cornelius Siagian, L. Alfaris, Aldi Cahya Muhammad, Ukta Indra Nyuswantoro, G. T. Rancak","doi":"10.14710/jpa.v5i2.17860","DOIUrl":"https://doi.org/10.14710/jpa.v5i2.17860","url":null,"abstract":"This research explores the concept of black holes in the physics of general relativity, including its formation and properties. The study focuses on the relationship between the orbital velocity and orbital distance of objects around a black hole, which is measured in units of the speed of light (c) and kiloparsecs (kpc), respectively. Using observational techniques, the study produces a plot showing the relationship between orbital velocity and orbital distance, which follows Kepler's law modified by the Newtonian theory of gravity and general relativity. The study also highlights the effective potential of particles in orbit around a black hole, which combines the effects of kinetic energy and gravitational potential. The effective potential shows the gravitational and relativistic properties of black holes, such as the photon orbit radius, ISCO, and the spin parameter. The resulting plot demonstrates the characteristics of the Milky Way black hole and how its spin parameter and Schwarzschild radius affect the orbital properties of surrounding particles. The study concludes that the closer the orbital distance is to the black hole, the more the orbital velocity increases, and particles with high spin parameters and small Schwarzschild radii are unlikely to escape the black hole's gravity.","PeriodicalId":280868,"journal":{"name":"Journal of Physics and Its Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134529758","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: 2