IOP Conference Series: Materials Science and Engineering最新文献

{"title":"Depth dose measurement by using Al2O3 OSL dosimeters in high energy photons in the presence of air cavity and density inhomogeneity","authors":"Mohd Fahmi Mohd Yusof, Amirah Sauki, Nur Ateqah Suzaini, Arifah Nazirah Abdullah, Ahmad Bazlie Abd Kadir, Norriza Mohd Isa","doi":"10.1088/1757-899x/1308/1/012011","DOIUrl":"https://doi.org/10.1088/1757-899x/1308/1/012011","url":null,"abstract":"\u0000 Air cavities and tissue density inhomogeneity significantly affects the distribution of radiation doses, potentially resulting in adverse consequences such as cancer recurrence. This research aims to assess the accuracy of Al2O3 optically stimulated luminescence (OSL) dosimeters in measuring doses within varying thicknesses of air cavities (3, 5, and 8 cm) and tissue inhomogeneity of low and high density simulated by the lung and bone phantoms. An expanded polystyrene (EPS) was employed in homogeneous solid water® phantoms to simulate the air cavity. The percentage depth-dose (PDD) curves at 6 MV photons were obtained in both presence of air cavity and density inhomogeneity and compared to that in the EBT3 radiochromic film dosimeters and treatment planning system (TPS). The results indicated that the presence of an air cavity and tissue inhomogeneity affected the depth dose measured in OSL dosimeters, EBT3 films and TPS. OSLD and TPS showed good agreement at the centre of the cavity, which is within ±5% but could not estimate scattered radiation to the distal and proximal surfaces of the air cavity. The obtained p-values showed no significant differences of dose measured in OSL dosimeters compared to those in EBT3 films and TPS. The Kruskal Wallis test and Mann-Whitney showed no significant difference between OSL dosimeters, EBT3 film and TPS in the measurement of depth doses in the presence of density inhomogeneity. The overall results indicated the suitability of OSL dosimeters as indirect dosimeters for the measurements of depth dose in the presence of air cavity and tissue density inhomogeneity","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141039261","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}

{"title":"Characterisation of sealed radioactive source for nuclear forensic purposes","authors":"Z. Laili, Hishamudin Husin, Ahmad Hasnulhadi Che Kamaruddin, Muhamad Azfar Azman, Wilfred Sylvester Paulus, Nadira Kamarudin","doi":"10.1088/1757-899x/1308/1/012016","DOIUrl":"https://doi.org/10.1088/1757-899x/1308/1/012016","url":null,"abstract":"\u0000 A study characterized sealed radioactive sources (60Co, 137Cs, and 241Am) for nuclear forensic analysis, focusing on their physical, macroscopic, and radiological properties. Results revealed specific features, such as stamped or engraved information, that served as valuable signatures for nuclear forensic investigation. Corrosion observations provide valuable insights into the condition of the source and historical context. Gamma-ray spectra analysis revealed clear distinctions, including a scattering peak in cylindrical 60Co and 137Cs disk sources (200-500 keV), which was absent in the cup-style 241Am source. Unusual peaks in the gamma spectra of 60Co, 137Cs, and 241Am sources suggested potential impurities or background radiation. This was indicated by non-Gaussian shapes and significant counts per second at specific energy levels. X-ray radiography effectively highlights nuclear material characteristics, emphasizing density, uniformity, and internal structure. This analysis contributed to the development of a National Nuclear Forensic Library (NNFL) and enhanced Malaysia’s capability in nuclear forensic investigations related to radioactive sources found outside regulatory control.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141031905","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}

{"title":"Analysis of Thorium (Th) and Uranium (U) in radioactive wastewater sample in accordance with American Public Health Association (APHA) 3125 method","authors":"Munirah Abdul Zali, A. Hashim, Shakirah Abd Shukor, Siti Aminah Omar, Z. Laili","doi":"10.1088/1757-899x/1308/1/012015","DOIUrl":"https://doi.org/10.1088/1757-899x/1308/1/012015","url":null,"abstract":"\u0000 The main issue with thorium (Th) and uranium (U) in radioactive wastewater is the potential of these elements to contaminate the water bodies. The unregulated radioactive wastewater release can affect the ecosystem and potentially harm aquatic life. Therefore, there is a need to establish the analysis of Th and U using standard method to obtain better sensitivity and good confidence in the final report. In this study, the determination of uranium and thorium was employed using the American Public Health Association (APHA) method 3125 standard method. The method performance and method detection level (MDL) samples for APHA 3125 were prepared in the deionized water and digested using hot block (APHA 3030E) and microwave digester (APHA 3030K). The quantification of 238U, 235U and 232Th in the method performance and MDL samples was performed using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). From the results, the method performance samples for both digestion methods were in accordance with the APHA requirement. The MDL obtained from APHA 3030E for 232Th, 238U, and 235U were 5, 7, and 8 μg L−1 respectively. Meanwhile, the MDL obtained from the microwave digester for 232Th, 238U, and 235U, and were 2, 3, and 3 μg L−1 respectively. The APHA 3030K digestion technique gives lower and better detection limit compared to the APHA 3030E technique. Based on APHA 3030K MDL, 232Th was detected in the radioactive wastewater sample while 238U and 235U were less than MDL. Meanwhile, for APHA 3030E, all elements were below MDL. This study will enhance the detection of uranium and thorium in the radioactive wastewater sample towards better environmental monitoring programs at the national and global levels.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141033106","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}

{"title":"Optimization of the diesel photovoltaic isolated system installed in the Nazareth community using wind energy.","authors":"L. M. Perpiñán, M. J. Bastidas, S. D. Vergara, V. J. Iguarán","doi":"10.1088/1757-899x/1299/1/012004","DOIUrl":"https://doi.org/10.1088/1757-899x/1299/1/012004","url":null,"abstract":"\u0000 The objective of the work is the optimization of the isolated and hybridized electric power generation system with photovoltaic technology and genset, installed in the village of Nazareth belonging to the municipality of Uribia, Colombia. The optimization criteria established in this study consists of respecting what is already installed and from there propose various search spaces in HOMER Energy to find the optimal system configuration, the main idea is to minimize the consumption of diesel fuel through the inclusion of a wind system. two optimal scenarios are proposed, the first minimizes the participation of the genset to 10%, the second proposes a system of 100% renewable energy generation. Based on the results of the study, it is concluded that the system proposed in scenario C is the most pertinent alternative, It is concluded that the system proposed in scenario C is the most relevant alternative, because the system has 90% autonomy without the generator set.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140273188","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}

{"title":"Expotecnología 2022","authors":"","doi":"10.1088/1757-899x/1299/1/011001","DOIUrl":"https://doi.org/10.1088/1757-899x/1299/1/011001","url":null,"abstract":"\u0000 Expotecnología 2022 was an event that took place in the city of Cartagena de Indias, from November 2 to 6, 2022, with the slogan “The future of engineering in the face of technological disruption” This eighteenth version was a meeting that brought together the scientific and academic community in spaces for the dissemination and transfer of knowledge, where innovation was the essence and a fundamental part of the event. Expotecnología was created in the Faculty of Engineering Sciences - FACI, of the Antonio de Arévalo University Foundation - UNITECNAR and in this version it maintained as mission, the development of the interaction between science, technology and society, through establishing of knowledge networks and academic and professional cooperation. The main objective was to address the challenges that emerge from the everyday life of the engineering community, the problems immersed in the development of projects and programs of Higher Education Institutions (IES), organizations and research centers at the national and international level. In the development of the day of presentations in a virtual way, it was possible to promote the dissemination of the research work of professionals, teachers and students from all areas of engineering, framed in four (4) thematic axes, as follows:\u0000 • New technologies: Big data, Artificial Intelligence, Business Intelligence, Software Engineering, Education and new technologies and Mobile Applications.\u0000 • Petrochemicals and process control: Materials Science, Instrumentation and Control Systems, Robotics and Automation and Industrial Maintenance.\u0000 • Electricity, electronics and telecommunications: IoT, Fiber optics, Digital Signal Processing, Wireless Networks, Mobile Communications, Power Systems, Energy Storage, Smart Grids, Renewable Energies, Operation and Distribution, Energy Dispatch, Energy Markets\u0000 • Construction Summit: Modern Building Systems and Computational Modeling.\u0000 On this occasion, the event was attended by 512 people, representatives from 25 national and 6 international universities. 32 presentations were made, of which 32 articles were selected for this volume of the IOP Conference Cycle: Materials Science and Engineering and 13 articles for the book Engineering, Innovation and the fourth industrial revolution., After a process of Peer Review. The plenary conferences were in charge of 2 national and 8 international speakers .\u0000 List of Invited speakers, Organizing Committee, Special thanks are available in this pdf.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140277283","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}

{"title":"Obtaining the percentages of ductility and brittleness of AISI/SAE 1020 and 304 steels, using digital image processing.","authors":"A. Rincón-Quintero, O. Lengerke, C. Sandoval-Rodríguez, K. T. Jaimes Quintero","doi":"10.1088/1757-899x/1299/1/012006","DOIUrl":"https://doi.org/10.1088/1757-899x/1299/1/012006","url":null,"abstract":"\u0000 This research is the integration of a set of elements in a system of capturing, processing, and digital image analysis. It allows a better visual and numeric interpretation to determine the toughness, ductility percentage, and fragility of steel AISI/SAE 1020 and 30, getting better qualitative and quantitative observation of the results from the impact test (Charpy test). Patterns in the standard form, ASTM E23, were digitalized to evaluate the percentage of ductility/fragility of specimen testing. After, we calculated the area and the equivalent diameter of the material. using digital image processing and numerical comparison between the patterns specified in the standard form ASTM E23 and the testing in the impact test, and it allows to find the kind of pattern it is closest and determine which degree of ductility. Finally, the results were compared by three experts. The algorithm accuracy was 80%.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140282996","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}

{"title":"Characteristics in the Fourier spectrum of images associated with discontinuities such as cracks and fissures in concrete structures.","authors":"C. Sandoval-Rodríguez, B. E. Tarazona-Romero, O. Lengerke, A. D. Rincon Quintero, K. T. Jaimes-Quintero","doi":"10.1088/1757-899x/1299/1/012005","DOIUrl":"https://doi.org/10.1088/1757-899x/1299/1/012005","url":null,"abstract":"\u0000 Increasing An algorithm is developed to identify differences between concrete slabs with some type of Crack and Fissure discontinuity. The Fourier transform is used as a basis. Different types of fil-ters were evaluated within the image processing algorithm, in order to adapt favorably to the discontinuity detection process, allowing the image data to be read in the frequency domain, generating a figure of merit to compare the image. where there are no discontinuities and those that have some alteration in their structure.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140277943","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}

{"title":"Educational strategies applied to the logistics system of transport, treatment and final disposal of used lubricating oils in Colombia","authors":"J. C. Murcia, L. J. Hernández, D. A. López","doi":"10.1088/1757-899x/1299/1/012007","DOIUrl":"https://doi.org/10.1088/1757-899x/1299/1/012007","url":null,"abstract":"\u0000 In Colombia, one of the problems that is evident and that is gaining strength is related to the inadequate management of dangerous resources such as used lubricating oils (ALU) from automobiles and motorcycles, where it is observed that there is no adequate pedagogical strategy on logistics systems or logistics processes that allow optimal final disposal, thus avoiding contamination and alteration in the environment. The methodology that was used for this investigation is of a mixed type, with a descriptive investigation, where the ignorance of the conditions for the adequate handling, treatment and disposal of used lubricating oils can be identified, emphasizing small and medium-sized mechanical companies. Mechanical workshops mainly in neighborhoods located in the city of Bogotá and mostly in locations that do not have the latest technology to provide such service. As results of the investigation, it was found that there is no educational model of socialization of a structured logistics system for establishments that provide mechanical services, in addition to the lack of training and awareness on the part of companies and entities dedicated to the use of this type of substances, denoting the importance of providing learning tools from the proposed educational strategy.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281691","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}

{"title":"Evaluation of the anaerobic digestion process for low and micro-scale biogas production: a review","authors":"N. Y. Castillo-Leon, B. E. Tarazona-Romero, M. E. C. Gamarra, O. A. Acosta-Cárdenas, Y. P. Quizena-Fernandez, M. Y. Alarcon-Guerrero","doi":"10.1088/1757-899x/1299/1/012008","DOIUrl":"https://doi.org/10.1088/1757-899x/1299/1/012008","url":null,"abstract":"\u0000 A theoretical analysis of biogas production technologies classified in two subgroups; low and micro scale, was carried out using the methodology of formal concept analysis (FCA) together with the VOSviewer and Conception Explorer tools for information processing, a series of attributes that each subsystem must comply with in terms of the sustainability of each technology were analyzed. The information selected for the development of the analysis required a quality study, based on the percentile of the journals in which the manuscript was published. The search for information was carried out in web sites such as: Scopus, Web Of Science, Dimensions and Lens among others. In total, 105 sources of academic information were analyzed, selecting 56 articles and 18 book chapters for the development of the work. In conclusion, it can be affirmed that low-scale biogas plants present more favorable characteristics than micro-scale plants; however, both technologies have a high potential for application worldwide in isolated or rural areas, supplying electric or thermal energy to less favored communities. Finally, it is important to point out that the methodology developed has proven to be a relevant tool for the classification of information and serves as a first step to group and relate search concepts by means of a deterministic set of attributes.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281767","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}

{"title":"Theoretical review based on the technologies developed in solar desalination.","authors":"K. T. Jaimes-Quintero, J. Ascanio-Villabona, B. E. Tarazona-Romero, A. Rincón-Quintero, M. Durán-Sarmiento","doi":"10.1088/1757-899x/1299/1/012013","DOIUrl":"https://doi.org/10.1088/1757-899x/1299/1/012013","url":null,"abstract":"\u0000 Increasing global demand for water and energy has given rise to renewable energies that offer an environmentally friendly alternative. Solar desalination systems have become a very attractive topic, due to the fact that areas lacking fresh water have a wealth of solar energy, allowing to present a convenient, promising and viable solution, also obtaining drinking water for consumption in remote areas from water with high salinity, where it is considered to be a process free of CO2 emissions when powered by solar radiation, being sustainable and environmentally friendly. The main objective of this study is to provide an extensive review of the different solar desalination systems, evaluating the indicators, factors and technologies involved in the process, through scientific sources such as: articles, academic publications, international congresses, indexed journals, and others.","PeriodicalId":509593,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140277668","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}