Journal of Applied Engineering Sciences最新文献

{"title":"Design of a GIS Database for Surface Mining","authors":"G.M. Vangu, A. Croitoru, M. Mitrache, N. Dima","doi":"10.2478/jaes-2023-0037","DOIUrl":"https://doi.org/10.2478/jaes-2023-0037","url":null,"abstract":"Abstract The mining industry is the branch that provides necessary mineral raw materials for a whole series of economic activities, with the main beneficiaries being the energy industry (through coal consumers), companies specialized in the processing of uranium concentrates, chemical industry, food industry, construction materials industry, non-ferrous metallurgical industry, etc. Thus, in accordance with the Romanian mining industry strategy 2017-2035, one of the objectives of the industrial policy in the mining field in Romania is the development and implementation of a database system for the mining sector. Specifically, the goal consists in a development of a tool for tracking and implementing the Mining Law, which allows the collection, storage, administration, modification and analysis of data regarding licenses and permits. At the same time, the development of a visualization and geographic information system (GIS) of mining exploration and exploitation perimeters, as support for the promotion of concessions for mineral resources, is being pursued. In this way, there is a tendency towards the automated and computerized management of the production processes. The development of such systems with practical applicability requires the design, development, and implementation of specific models and databases. The structure and quality of the designed data models directly influence the exploitability and analytical capability of the systems. This paper analyzes the possibilities of designing and implementing a database for the management of the surface mining activities. In the first part of the paper, the basic principles regarding the design and population of databases are presented, as well as their correlation with user requirements and exploitation needs. In the second part, a data model was proposed for the management of mining activities, in accordance with the main stages in the life cycle of a mining operation. In the end, several scenarios for the exploitation of GIS databases were presented, as well as their interconnection with data sources external to the system.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":" 14","pages":"289 - 296"},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138620881","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":"Effect of Steel Fibers on Compressive Strength of Recycled Aggregate Concrete","authors":"I. Shaikh, B. Memon, M. A. Memon, M. Oad, A. H. Memon","doi":"10.2478/jaes-2023-0016","DOIUrl":"https://doi.org/10.2478/jaes-2023-0016","url":null,"abstract":"Abstract In this research article effect of steel fibers on workability and compressive strength of recycled aggregate concrete is presented. Recycled aggregates from demolished waste were used in equal proportion with conventional aggregates. Steel fibers of 1 mm diameter and 25 mm length were used. For preparation of concrete 1:2:4 mix with 0.55 water-cement ratio was used. Workability of each mix was checked by slump cone test. Total of 40 samples were prepared in standard way and cured for 28 days. All the specimens were tested for maximum load in universal testing machine under gradually increasing load at the rate of 0.5 kN/sec. Recorded load was converted into compressive strength. The obtained results showed that slump of the concrete decreased with increase in the dosage of the steel fibers than conventional concrete. Compressive strength was observed 15% and 34% higher than the compressive strength of conventional and recycled aggregate concrete at the steel fiber dosage of 3%. It is evident that although addition of recycled aggregates in concrete reduces the compressive strength but binary blending with steel fibers not only overcomes this loss but shows strength gain with increase in the dosage of the fibers.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"123 - 130"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41939303","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":"A Study on Migration in Sudan Using Geographic Information Systems Technology","authors":"Sahar I. M. Abd Elrahman, I. M. I. Ataalmanan","doi":"10.2478/jaes-2023-0001","DOIUrl":"https://doi.org/10.2478/jaes-2023-0001","url":null,"abstract":"Abstract Migration between countries is not a fresh problem; it has occurred since the dawn of time, but little research has been conducted on it, particularly by employing effective technologies such as Geographic Information Systems (GIS). As a result, the purpose of this paper was to investigate the migration of Sudanese to other countries and vice versa, as well as the migration of students of higher education from Sudan to other countries. To study all this, the ArcGIS 10.8 program was used, and in it inserted and created all the relevant data from shapefiles and attribute data. The Add XY Coordinates, XY To Line, and Time Slider tools were also used. Migration lines showing migration from and to Sudan in 2015 were drawn based on the nine most prominent countries for each, and a video of an interactive time map illustrating students’ migration to fifteen foreign countries from 1998 to 2015 was created. Graphs that show the relationship between countries and the number of immigrants were also created, and they are considered a good means of comprehension even by non-geographic information systems specialists.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"1 - 8"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48826564","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":"A Comparative Study: Effects of Fineness of Cement on Consistency and Compressive Strength of Different Branded Cement in Pakistan","authors":"M. Adil Sultan, M. Jawad, M. Muzffar Iqbal, Dr. Imran Ghafoor, U. Farooq, Salah Din, A. Mushtaq","doi":"10.2478/jaes-2023-0002","DOIUrl":"https://doi.org/10.2478/jaes-2023-0002","url":null,"abstract":"Abstract Cement is one of the key components of concrete, and the qualities of a particular type of cement will affect the attributes of concrete made with that cement. The influence of variations in cement brand attributes that are available in Pakistan is examined in this study. Poor cement choice may affect how long a concrete building project will last. Fineness, cement consistency, concrete compressive strength, and mortar cube strength all grow with cement fineness since they all have a positive relationship with each other. This study aimed to investigate a few particular mechanical and physical characteristics of eight cement brands used in Punjab, Pakistan. The brands of cement that were compared were Kohat, Askari, Bestway, Paidaar, DG, Pioneer, Flying, and Fauji cement. The testing was carried out in a lab and according to ASTM guidelines. In contrast, Kohat had 5.17%, Askari had 8.67%, Bestway had 3%, DG had 2.67, Flying had 9.67, and Fauji cement had 6.33%, with only Paidaar above the allowed limits. Kohat and Paidaar cement's typical consistency was 30%, DG cement was 26%, and Bestway cement was 26%; all of them fell within the range of (26%- 33%). The 28-day compressive strength test results for DG cement and Bestway cement were 7787.74 Psi and 7225.17 Psi, respectively. The strength of Pioneer and Flying cement was found to be lower than that of other cement brands. Except for DG and Bestway cement, all eight brands of cement are used for all structural elements. Bestway cement is much superior for high-rise structures and heavy structural members. Consequently, by comparing the trace element concentration of various brands of Portland cement in Pakistan, the study evaluates the impact of trace element content on cement quality and concrete strength.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"9 - 16"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43202756","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":"Numerical Simulation Evaluation of Fire Spreading in a Building Using Fire Dynamics Simulator (FDS)","authors":"I. Enaru, N. Cherecheș, S. Hudișteanu, E. Țurcanu, Ana-Diana Ancaş, M. Verdeș, C. Popovici, V. Ciocan","doi":"10.2478/jaes-2023-0009","DOIUrl":"https://doi.org/10.2478/jaes-2023-0009","url":null,"abstract":"Abstract The 3D model of a building was built to analyze the scene of a fire with reference to the real situation. The process of evolution of a fire was simulated with FDS. The evolution time of the fire, the degree of danger, the temperature as well as the visibility was analyzed. Architectural solutions that could be considered for the prevention and evolution of fire in the presented situations were also analyzed. The results of the simulations in the proposed scenarios showed that solutions could be found to prevent the spread of fire. The results of the study provide a real base for improving the evacuation conditions and limiting the damage caused by fire in single-family buildings.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"65 - 72"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43262721","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":"Strength (Compressive) of Concrete Made by Recyclable Concrete Aggregates after Six Hour Fire by Nondestructive Testing","authors":"A. H. Buller, N. M. Husain, I. Ali, S. Sohu, B. Memon, I. N. Sodhar","doi":"10.2478/jaes-2023-0008","DOIUrl":"https://doi.org/10.2478/jaes-2023-0008","url":null,"abstract":"Abstract Quality of concrete is mainly measured by evaluating its strength. Destructive testing of concrete specimens is used for the purpose. An alternative to it is the non-destructive testing. This research work presents non-destructive testing of concrete cylinders made by using partial replacement of natural coarse aggregates with old concrete as coarse aggregates and exposed to 6-hour fire at 1000ºC. Rebound hammer is used in this work to evaluate concrete strength. 240 concrete cylinders are cast using 1:2:4 mix and 0.54 water cement ratio. After 28-days curing half of the cylinders are exposed to fire in purpose made oven. Remaining 50% aggregates are used as control specimen to compare the results. After rebound hammer testing, all the cylinders are tested for compressive strength using universal testing machine. Comparison of the results shows the reliability of non-destructive testing and effectiveness of the rebound hammer technique as the difference between NDT and UTM results is maximum up to 4.7%.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"57 - 64"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49000701","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":"Possibilities of Registering Natural Underground Cavities into the National Integrated Information System of Cadastre and Land Registry","authors":"A. Buda, Alexandra-Paula Frenț, S. Nistor, N. Suba","doi":"10.2478/jaes-2023-0007","DOIUrl":"https://doi.org/10.2478/jaes-2023-0007","url":null,"abstract":"Abstract The problem of registering underground cavities and caves is an older one at national level. With the advent of several legislative initiatives regarding this type of entity, the term cadastre of caves also appeared. The case study is represented by the \"Şuticoasa\" Cave, which is located in the perimeter of the archaeological site, the Şinteu Fortress \"Piatra Şoimului\", being an integral part of the medieval monument in pestis village, a village belonging to Alesd city in Bihor county. For this purpose, this paper presents the techniques of data acquisition, their processing and a first attempt to refer to this type of entity in an existing land register.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"53 - 56"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41642591","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":"Thermal Effect on the Design Loads of Multi-Storey RC Buildings on Sloped Terrain in Saudi Arabia","authors":"M. Laissy, Ayed Eid Alluqmani","doi":"10.2478/jaes-2023-0011","DOIUrl":"https://doi.org/10.2478/jaes-2023-0011","url":null,"abstract":"Abstract This research investigates the impact of thermal loads on reinforced concrete (RC) buildings in Saudi Arabia and how they behave on sloped terrain. The study analyzed the effects of different types of support systems (hinged and fixed supports) and strengthening systems (with and without bracings) using the software ETABS-V20. Ground + 9 typical floors frame RC models on sloped terrain subjected to seismic loads were used for the investigation. The dynamic analysis of the ETABS models was performed to evaluate the lateral displacement, storey drift, column shear forces, and base shear forces of the buildings. The study found that using a bracing system and fixed supports under seismic loads increases the model’s displacement and storey drift compared to models with hinged supports and no bracing system. The maximum shear forces values were also higher for models with bracing systems and fixed supports, while the minimum values were for models without bracing systems and with hinged supports.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"83 - 90"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48736471","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":"Pedestrians Crossing Comfort Analysis for a Footbridge Over Someş River","authors":"C. Moga, Crina Feneşan, M. Suciu","doi":"10.2478/jaes-2023-0012","DOIUrl":"https://doi.org/10.2478/jaes-2023-0012","url":null,"abstract":"Abstract Due to the relatively low rigidities in the vertical and horizontal planes, the structures of the footbridges must be checked from the point of view of their dynamic behavior, so as to avoid the resonance phenomenon and to ensure the walking comfort of the pedestrians. The paper presents some aspects related to the dynamic behaviour, for the pedestrian bridge with a span of 31.5 m that was constructed in The Railway Park area of Cluj-Napoca city, over the Someşul Mic River, in 2022. In terms of pedestrian traffic density, the structure falls into Category III: Footbridges for normal use occasionally crossed by large groups of pedestrians. After the finalization of the project The Revitalization and Activation of the Railway Park in Cluj-Napoca city, the park will include two pedestrian walkways with similar superstructure, which crosses the Someș River, but in the vicinity of the park a road bridge with 4 traffic lanes and two sidewalks was also built during this period. Given the possibility of changing the density of walking in the future, the footbridge was also analysed for higher density conditions, so that there is no need to carry out structural intervention works in the near future, except for known maintenance works.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"91 - 98"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44483990","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":"Problems Related to Selected Methods and Techniques of as-Built Surveys of Low- and Medium-Voltage Electricity Connectors with a Practical Discussion","authors":"M. Turek, M. Buśko, A. Buda, K. Maciuk","doi":"10.2478/jaes-2023-0017","DOIUrl":"https://doi.org/10.2478/jaes-2023-0017","url":null,"abstract":"Abstract The aim of the paper was to analyse problems related to the inventory (as-built survey) of low and medium voltage power lines. Measurement methods and techniques were analysed as well as the influence of the network type (low and medium voltage) on the as-built survey procedure. For this purpose, information obtained from five as-built survey reports of medium and low voltage using different measurement methods was also used. Three of them were sample as-built survey of low voltage cable lines measured by tacheometric method, one as-built survey of medium and low voltage lines measured by GNSS method and one of low voltage cable made by indirect method using cable locator and measured by GNSS technology. The paper analyses the differences arising from the accuracy of the measurement, the difficulties encountered during the implementation, the time-consuming nature of the work performed, taking into account safety aspects for the persons performing the work.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"13 1","pages":"131 - 136"},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47948015","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}