Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.9
T. Matyja, A. Kubik, Z. Stanik
MEMS technology has made sensors for measuring barometric pressure and altitude above sea level very cheap and widely used in many consumer electronic devices. This paper presents a theoretical analysis of the sources and types of errors in the barometric altimeter using the standard atmosphere model (ISA). Methods for correcting principal errors caused by non-standard sea level conditions are described and compared. A method of correcting errors in the case of altimeter horizontal movement to the air column and total pressure measurement was proposed. It was compared with another method known from the literature. In the numerical experiment, data recorded by a bicycle computer equipped with a MEMS-based barometric altimeter was analyzed. As the GPS data of the route covered was also known, it was possible to compare the recorded altimeter data with the heights determined from the digital terrain model (DTM), which in this case were considered accurate. The error of the measured altitude calculated in this way was tried to be divided into the principal error, the external error caused by the sensor movement, and the barometer drift. Hence, a numerical experiment was carried out in which, based on the recorded data, an attempt was made to reconstruct non-standard sea level conditions and the impact of speed on the sensor measurements. Furthermore, a method of solving such a reverse problem was proposed. The results of the presented studies can be used in the design of systems correcting the indications of barometric altimeters. The accuracy of the altitude measurement is especially important for small controlled flying objects (UAH) and when recording the route of vehicles moving on the ground.
{"title":"THE MEMS-BASED BAROMETRIC ALTIMETER INACCURACY AND DRIFT PHENOMENON","authors":"T. Matyja, A. Kubik, Z. Stanik","doi":"10.20858/sjsutst.2022.116.9","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.9","url":null,"abstract":"MEMS technology has made sensors for measuring barometric pressure and altitude above sea level very cheap and widely used in many consumer electronic devices. This paper presents a theoretical analysis of the sources and types of errors in the barometric altimeter using the standard atmosphere model (ISA). Methods for correcting principal errors caused by non-standard sea level conditions are described and compared. A method of correcting errors in the case of altimeter horizontal movement to the air column and total pressure measurement was proposed. It was compared with another method known from the literature. In the numerical experiment, data recorded by a bicycle computer equipped with a MEMS-based barometric altimeter was analyzed. As the GPS data of the route covered was also known, it was possible to compare the recorded altimeter data with the heights determined from the digital terrain model (DTM), which in this case were considered accurate. The error of the measured altitude calculated in this way was tried to be divided into the principal error, the external error caused by the sensor movement, and the barometer drift. Hence, a numerical experiment was carried out in which, based on the recorded data, an attempt was made to reconstruct non-standard sea level conditions and the impact of speed on the sensor measurements. Furthermore, a method of solving such a reverse problem was proposed. The results of the presented studies can be used in the design of systems correcting the indications of barometric altimeters. The accuracy of the altitude measurement is especially important for small controlled flying objects (UAH) and when recording the route of vehicles moving on the ground.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41978907","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}
Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.10
Aldona KUŚMIŃSKA-FIJAŁKOWSKA, Z. Łukasik, J. Kozyra
One of the priorities of the EU economy is to create the best possible conditions for the design and implementation of innovative solutions within the scope of energy efficiency. In recent years, there has been quick technological progress in the field of devices having controlled motor drive used for air purification, and from heating plates, which are applied in the eating places, including restaurants and zones for preparing meals in various means of transport. The research conducted by the EU on EcoDesign requirements showed that range hoods at the stage of their use have a considerable potential of saving energy. The introduction of energy efficiency labels to the market has improved the energy efficiency of these devices and accelerated the transformation of the market to implement energy-saving technologies, which according to the experts, may lead to an annual primary energy saving of 27 PJ/year in 2021, which may increase in 2030 to 60 PJ/year. The authors of this publication researched the fluid dynamic efficiency of a selected range hood, showing the necessity of investments in new technologies. Patented original solutions of the range hoods that can be applied, among others, in such means of transport as passenger ships, cargo ships, and submarines having a zone for preparing meals were presented in this article. An environmental aspect in the context of energy consumption was shown during the phase of using the device for air purification, providing many premises and arguments for future constructional solutions for energy management in various branches of transport and more.
{"title":"INNOVATIVE SOLUTIONS OF DEVICES WITHIN THE SCOPE OF ENERGY CONSUMPTION APPLIED IN VARIOUS BRANCHES OF TRANSPORT","authors":"Aldona KUŚMIŃSKA-FIJAŁKOWSKA, Z. Łukasik, J. Kozyra","doi":"10.20858/sjsutst.2022.116.10","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.10","url":null,"abstract":"One of the priorities of the EU economy is to create the best possible conditions for the design and implementation of innovative solutions within the scope of energy efficiency. In recent years, there has been quick technological progress in the field of devices having controlled motor drive used for air purification, and from heating plates, which are applied in the eating places, including restaurants and zones for preparing meals in various means of transport. The research conducted by the EU on EcoDesign requirements showed that range hoods at the stage of their use have a considerable potential of saving energy. The introduction of energy efficiency labels to the market has improved the energy efficiency of these devices and accelerated the transformation of the market to implement energy-saving technologies, which according to the experts, may lead to an annual primary energy saving of 27 PJ/year in 2021, which may increase in 2030 to 60 PJ/year. The authors of this publication researched the fluid dynamic efficiency of a selected range hood, showing the necessity of investments in new technologies. Patented original solutions of the range hoods that can be applied, among others, in such means of transport as passenger ships, cargo ships, and submarines having a zone for preparing meals were presented in this article. An environmental aspect in the context of energy consumption was shown during the phase of using the device for air purification, providing many premises and arguments for future constructional solutions for energy management in various branches of transport and more.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46289504","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}
Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.6
F. Dashdamirov, Ulvi Javadli, Turan Verdiyev
With the growth of the population and the expansion of the territory of large cities, certain difficulties arise in meeting the needs of passengers for transportation. This article studied the satisfaction of users with the city's public transport system, especially the bus transport. Thus, a survey was conducted among passengers in Baku to assess their satisfaction with public transport. The survey covered all districts of Baku in general. The study was conducted in October 2021. The questions were aimed at identifying the weight, reasons for preferring the different types of public transport, the level of satisfaction of the population with these types, assessing the quality of services and the lack of urban bus transport. The level of satisfaction of survey participants with the work of public transport by gender and age groups was determined. Subsequently, this study showed that most of the population movements are carried out by bus transport. The analysis revealed factors that reduce the quality of service on bus routes. In addition, it examined the reasons why the population chose the bus transport, the shortcomings of the bus transport, the effectiveness of dedicated bus lanes, and attitudes toward the use of alternative public transport. Summarily, this study was successful in identifying the shortcomings of public transport in the city, improving passenger service to increase passenger satisfaction toward attracting more people to public transport.
{"title":"COMPARATIVE ANALYSIS OF THE WEIGHT AND QUALITY OF URBAN BUS TRANSPORT SERVICES: A CASE STUDY OF BAKU","authors":"F. Dashdamirov, Ulvi Javadli, Turan Verdiyev","doi":"10.20858/sjsutst.2022.116.6","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.6","url":null,"abstract":"With the growth of the population and the expansion of the territory of large cities, certain difficulties arise in meeting the needs of passengers for transportation. This article studied the satisfaction of users with the city's public transport system, especially the bus transport. Thus, a survey was conducted among passengers in Baku to assess their satisfaction with public transport. The survey covered all districts of Baku in general. The study was conducted in October 2021. The questions were aimed at identifying the weight, reasons for preferring the different types of public transport, the level of satisfaction of the population with these types, assessing the quality of services and the lack of urban bus transport. The level of satisfaction of survey participants with the work of public transport by gender and age groups was determined. Subsequently, this study showed that most of the population movements are carried out by bus transport. The analysis revealed factors that reduce the quality of service on bus routes. In addition, it examined the reasons why the population chose the bus transport, the shortcomings of the bus transport, the effectiveness of dedicated bus lanes, and attitudes toward the use of alternative public transport. Summarily, this study was successful in identifying the shortcomings of public transport in the city, improving passenger service to increase passenger satisfaction toward attracting more people to public transport.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47750648","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}
Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.1
S. O. Adebiyi, Oluwagbenga John Akinrinmade, B. B. Amole
Evaluation of Bus Rapid Transportation (BRT) based on service quality criteria and customer satisfaction can never be overemphasized due to its derivative, such as optimizing the performance of the transportation industry. Thus, this study employs the multi-criteria decision-making (MCDM) method for the evaluation of service quality and customer satisfaction of the BRT system in Nigeria using the fuzzy analytical hierarchy process (FAHP) and visekriterijumska optimizacija i kompromisno resenje (VIKOR), which are components of multi-criteria optimization and compromise solution to evaluate notable factors responsible for the user’s perspective. Research design is quantitative and analytical in nature through a survey of experts who are users of BRT services. Samples were drawn through a multi-stage sampling procedure and a total of 402 copies of questionnaires were administered to BRT users based on their experience with the system. Hence, VIKOR and FAHP methods are applied to analyse data retrieved from the field on services quality and performance level. The service quality (SERVQUAL) model (a multi-dimensional research instrument designed to capture consumer expectations and perceptions of service) was modified thereby generating six dimensions and thirty-six service criteria for this research. The FAHP method was employed to determine the weights of the decision criteria because there is a need to measure commuters’ perceptions and expectations based on numerical linguistic variables due to the vague, imprecise and complexity related to the nature of services. The criteria weights and responses of the survey analysis (data) related with the BRT are input for the VIKOR method for ranking. As measuring the perception of service quality based on crispy value can often be misleading, hence, the use of the fuzzy MCDM method can give a more realistic measurement. The result of the multi-criteria decision analysis revealed that pricing quality is the most relevant service quality dimension to users’ satisfaction, followed by the empathy quality dimension. The summary of strength and weakness areas of service quality discovered through the research and its managerial implications with recommendations were related to the appropriate authority in charge of the BRT system for improved performance.
基于服务质量标准和客户满意度的快速公交（BRT）评估无论怎么强调都不为过，因为它的衍生物，例如优化交通行业的绩效。因此，本研究采用多准则决策（MCDM）方法，使用模糊层次分析法（FAHP）和visekriterijumska optimizacija i kopromisino resenje（VIKOR）评估尼日利亚快速公交系统的服务质量和客户满意度，它们是多准则优化和折衷解决方案的组成部分，用于评估负责用户观点的显著因素。研究设计通过对快速公交服务用户专家的调查，具有定量和分析性质。通过多阶段抽样程序抽取样本，根据BRT用户使用该系统的经验，共向他们发放了402份问卷。因此，VIKOR和FAHP方法被应用于分析从现场检索到的关于服务质量和性能水平的数据。对服务质量（SERVQUAL）模型（一种旨在捕捉消费者对服务的期望和感知的多维研究工具）进行了修改，从而为本研究生成了六个维度和三十六个服务标准。采用FAHP方法来确定决策标准的权重，因为由于与服务性质相关的模糊、不精确和复杂性，需要基于数字语言变量来衡量通勤者的感知和期望。与BRT相关的调查分析（数据）的标准权重和响应被输入VIKOR方法进行排名。由于基于脆值来衡量对服务质量的感知往往会产生误导，因此，使用模糊MCDM方法可以给出更现实的衡量。多准则决策分析结果表明，定价质量是与用户满意度最相关的服务质量维度，其次是移情质量维度。通过研究发现的服务质量优势和薄弱环节的总结及其管理意义和建议与快速公交系统的相关主管部门有关，以提高绩效。
{"title":"OPTIMIZING SERVICE QUALITY MANAGEMENT OF THE BUS RAPID TRANSPORT SYSTEM IN LAGOS USING THE MULTI-CRITERIA DECISION ANALYSIS","authors":"S. O. Adebiyi, Oluwagbenga John Akinrinmade, B. B. Amole","doi":"10.20858/sjsutst.2022.116.1","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.1","url":null,"abstract":"Evaluation of Bus Rapid Transportation (BRT) based on service quality criteria and customer satisfaction can never be overemphasized due to its derivative, such as optimizing the performance of the transportation industry. Thus, this study employs the multi-criteria decision-making (MCDM) method for the evaluation of service quality and customer satisfaction of the BRT system in Nigeria using the fuzzy analytical hierarchy process (FAHP) and visekriterijumska optimizacija i kompromisno resenje (VIKOR), which are components of multi-criteria optimization and compromise solution to evaluate notable factors responsible for the user’s perspective. Research design is quantitative and analytical in nature through a survey of experts who are users of BRT services. Samples were drawn through a multi-stage sampling procedure and a total of 402 copies of questionnaires were administered to BRT users based on their experience with the system. Hence, VIKOR and FAHP methods are applied to analyse data retrieved from the field on services quality and performance level. The service quality (SERVQUAL) model (a multi-dimensional research instrument designed to capture consumer expectations and perceptions of service) was modified thereby generating six dimensions and thirty-six service criteria for this research. The FAHP method was employed to determine the weights of the decision criteria because there is a need to measure commuters’ perceptions and expectations based on numerical linguistic variables due to the vague, imprecise and complexity related to the nature of services. The criteria weights and responses of the survey analysis (data) related with the BRT are input for the VIKOR method for ranking. As measuring the perception of service quality based on crispy value can often be misleading, hence, the use of the fuzzy MCDM method can give a more realistic measurement. The result of the multi-criteria decision analysis revealed that pricing quality is the most relevant service quality dimension to users’ satisfaction, followed by the empathy quality dimension. The summary of strength and weakness areas of service quality discovered through the research and its managerial implications with recommendations were related to the appropriate authority in charge of the BRT system for improved performance.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45670969","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}
Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.2
Zineb Achetoui, C. Mabrouki, A. Mousrij
This paper aims to provide a performance measurement system for the automotive spare parts supply chain. We focus on an independent distributor belonging to an independent channel. The framework encompasses different performance aspects for a high supply chain visibility, as well as the required categories, subcategories and key performance indicators for the automotive spare parts supply chain performance measurement. The framework is the first contribution that advances the performance measurement in the automotive aftermarket and allows assessing the performance of the automotive spare parts supply chain as a whole.
{"title":"A BALANCED PERFORMANCE MEASUREMENT SYSTEM FOR AUTOMOTIVE SPARE PARTS SUPPLY CHAIN","authors":"Zineb Achetoui, C. Mabrouki, A. Mousrij","doi":"10.20858/sjsutst.2022.116.2","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.2","url":null,"abstract":"This paper aims to provide a performance measurement system for the automotive spare parts supply chain. We focus on an independent distributor belonging to an independent channel. The framework encompasses different performance aspects for a high supply chain visibility, as well as the required categories, subcategories and key performance indicators for the automotive spare parts supply chain performance measurement. The framework is the first contribution that advances the performance measurement in the automotive aftermarket and allows assessing the performance of the automotive spare parts supply chain as a whole.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46796062","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}
Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.7
A. Dudziak, M. Stoma, G. Zając
Conducting research on the quality of service and customer satisfaction is currently necessary for the proper and effective functioning of any organization. One of the organizations that have changed in recent years is petrol stations. In this paper, the Customer Satisfaction Index (CSI) is used to measure the quality of services and customer satisfaction. This research was carried out with the use of a proprietary questionnaire in which the respondents assessed the level of service at petrol stations. The obtained results allowed identifying the most important areas for the customers of petrol stations. In addition, the developed quality map indicated areas that should be given special attention, improved and those that are least important to customers. The conducted analyzes indicate that the CSI method used in this study is a tool that enables the assessment of customer satisfaction in a complex organization such as a petrol station.
{"title":"APPLICATION OF THE CSI METHOD TO TEST CONSUMER SATISFACTION: A CASE STUDY OF PETROL STATIONS","authors":"A. Dudziak, M. Stoma, G. Zając","doi":"10.20858/sjsutst.2022.116.7","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.7","url":null,"abstract":"Conducting research on the quality of service and customer satisfaction is currently necessary for the proper and effective functioning of any organization. One of the organizations that have changed in recent years is petrol stations. In this paper, the Customer Satisfaction Index (CSI) is used to measure the quality of services and customer satisfaction. This research was carried out with the use of a proprietary questionnaire in which the respondents assessed the level of service at petrol stations. The obtained results allowed identifying the most important areas for the customers of petrol stations. In addition, the developed quality map indicated areas that should be given special attention, improved and those that are least important to customers. The conducted analyzes indicate that the CSI method used in this study is a tool that enables the assessment of customer satisfaction in a complex organization such as a petrol station.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43167479","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}
Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.8
Zohra GHAFOURI FARD, M. Khabiri, Pouya AFKHAMI MEYBODI
Today, the increasing development of urbanization and climate change and its resulting issues, including the occurrence of urban floods, is one of the important issues facing city managers. One of these problems that seriously affect lives today is the occurrence of floods and the inundation of urban thoroughfares. Among the problems of floods in urban areas are the disruption of the urban transportation system, reduced transportation safety, inundation of thoroughfares, and consequently, the poor appearance of urban roads. One of the successful strategies in controlling urban runoff is the use of porous pavements in urban thoroughfares. The two capabilities of permeability and evaporation of a porous pavement lead to reduced runoff and a resultant lack of occurrence of inundation of thoroughfares; therefore, accurate measurement of these two parameters is of special importance. This study aims to introduce two devices for measuring the permeability and evaporation of porous asphalt with an innovative method that can measure the permeability and evaporation of asphalt and porous concrete with appropriate accuracy.
{"title":"AN INNOVATIVE METHOD IN MEASURING PERMEABILITY AND EVAPORATION PARAMETERS IN POROUS PAVEMENTS WITH EMPHASIS ON ITS EFFECTS ON INCREASING URBAN TRANSPORT SAFETY","authors":"Zohra GHAFOURI FARD, M. Khabiri, Pouya AFKHAMI MEYBODI","doi":"10.20858/sjsutst.2022.116.8","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.8","url":null,"abstract":"Today, the increasing development of urbanization and climate change and its resulting issues, including the occurrence of urban floods, is one of the important issues facing city managers. One of these problems that seriously affect lives today is the occurrence of floods and the inundation of urban thoroughfares. Among the problems of floods in urban areas are the disruption of the urban transportation system, reduced transportation safety, inundation of thoroughfares, and consequently, the poor appearance of urban roads. One of the successful strategies in controlling urban runoff is the use of porous pavements in urban thoroughfares. The two capabilities of permeability and evaporation of a porous pavement lead to reduced runoff and a resultant lack of occurrence of inundation of thoroughfares; therefore, accurate measurement of these two parameters is of special importance. This study aims to introduce two devices for measuring the permeability and evaporation of porous asphalt with an innovative method that can measure the permeability and evaporation of asphalt and porous concrete with appropriate accuracy.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44553706","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}
Pub Date : 2022-09-01DOI: 10.20858/sjsutst.2022.116.11
M. Krześniak, M. Jacyna, Piotr Pryciński, Jakub Murawski, Michał Bańka
The value chain can be defined as a set of all processes and procedures necessary to deliver a product or service to the end-user through various stages of development. A concept of the value chain is essential in the context of transport, as the transport process is usually one of the last elements of the value chain and determines the final value of a product or service offered. In recent years, the domestic and international rail transport market has undergone significant changes, including ongoing globalisation processes, growing importance of international trade, increase in intermodal transport significance, numerous investment outlays in transport infrastructure, means of transport, and the area of rail transport interoperability. All the above-described aspects have an impact on the value chain in transport. This paper presents an analysis of the value chain in transport processes in an aspect of rail transport. Elements of the railway transport organisation process, which affect the entire value chain, were briefly characterised in this article. Moreover, based on statistical data and a literature review, factors that fundamentally impact the efficient organisation of rail transport processes were identified.
{"title":"BUSINESS ENVIRONMENT OF RAIL TRANSPORT IN THE CONTEXT OF THE VALUE CHAIN","authors":"M. Krześniak, M. Jacyna, Piotr Pryciński, Jakub Murawski, Michał Bańka","doi":"10.20858/sjsutst.2022.116.11","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.116.11","url":null,"abstract":"The value chain can be defined as a set of all processes and procedures necessary to deliver a product or service to the end-user through various stages of development. A concept of the value chain is essential in the context of transport, as the transport process is usually one of the last elements of the value chain and determines the final value of a product or service offered. In recent years, the domestic and international rail transport market has undergone significant changes, including ongoing globalisation processes, growing importance of international trade, increase in intermodal transport significance, numerous investment outlays in transport infrastructure, means of transport, and the area of rail transport interoperability. All the above-described aspects have an impact on the value chain in transport. This paper presents an analysis of the value chain in transport processes in an aspect of rail transport. Elements of the railway transport organisation process, which affect the entire value chain, were briefly characterised in this article. Moreover, based on statistical data and a literature review, factors that fundamentally impact the efficient organisation of rail transport processes were identified.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48041408","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}
Pub Date : 2022-06-30DOI: 10.20858/sjsutst.2022.115.2
K. Krasuski, A. Ciećko, D. Wierzbicki
This study presents a modified algorithm to determine the accuracy of GPS positioning in aerial navigation. To achieve this, a mixed model with measurement weights was used to determine the resultant value of accuracy of aerial vehicle positioning. The measurement weights were calculated as a function of the number of GPS tracking satellites. The calculations were performed on actual GPS measurement data recorded by two onboard GNSS receivers installed onboard a Cessna 172 aircraft. The flight test was conducted around the military airport in Dęblin. The conducted analyses demonstrated that the developed algorithm improved the accuracy of GPS positioning from 62 to 91% for horizontal coordinates and between 16-83% for the vertical component of the aerial vehicle position in the BLh ellipsoidal frame. The obtained test results show that the developed method improves the accuracy of aircraft position and could be applied in aerial navigation.
{"title":"ACCURACY ANALYSIS OF AIRCRAFT POSITIONING USING GPS DUAL RECEIVERS IN AERIAL NAVIGATION","authors":"K. Krasuski, A. Ciećko, D. Wierzbicki","doi":"10.20858/sjsutst.2022.115.2","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.115.2","url":null,"abstract":"This study presents a modified algorithm to determine the accuracy of GPS positioning in aerial navigation. To achieve this, a mixed model with measurement weights was used to determine the resultant value of accuracy of aerial vehicle positioning. The measurement weights were calculated as a function of the number of GPS tracking satellites. The calculations were performed on actual GPS measurement data recorded by two onboard GNSS receivers installed onboard a Cessna 172 aircraft. The flight test was conducted around the military airport in Dęblin. The conducted analyses demonstrated that the developed algorithm improved the accuracy of GPS positioning from 62 to 91% for horizontal coordinates and between 16-83% for the vertical component of the aerial vehicle position in the BLh ellipsoidal frame. The obtained test results show that the developed method improves the accuracy of aircraft position and could be applied in aerial navigation.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46313246","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}
Pub Date : 2022-06-30DOI: 10.20858/sjsutst.2022.115.16
Remigiusz Wiedemann
This paper deals with the problem of urban traffic control, considering public transport as a priority. According to the authors, the occupancy of a means of transport is one of the key decision variables in the process of prioritisation within a traffic signal program. This study aims to construct a method of occupancy-based traffic light priority for public transport and investigate the possibility of using this information to increase the efficiency of signal control for time loss. The mathematical model of the priority level conditioning procedure proposed in the method was tested using a microsimulation model of the intersection. The simulation results were collated and compared with an approach that does not consider vehicle occupancy. Under given traffic conditions, the use of the proposed method allows for reducing the average time losses per person in the modelled road network.
{"title":"METHOD OF OCCUPANCY-BASED TRAFFIC LIGHT PRIORITY FOR PUBLIC TRANSPORT","authors":"Remigiusz Wiedemann","doi":"10.20858/sjsutst.2022.115.16","DOIUrl":"https://doi.org/10.20858/sjsutst.2022.115.16","url":null,"abstract":"This paper deals with the problem of urban traffic control, considering public transport as a priority. According to the authors, the occupancy of a means of transport is one of the key decision variables in the process of prioritisation within a traffic signal program. This study aims to construct a method of occupancy-based traffic light priority for public transport and investigate the possibility of using this information to increase the efficiency of signal control for time loss. The mathematical model of the priority level conditioning procedure proposed in the method was tested using a microsimulation model of the intersection. The simulation results were collated and compared with an approach that does not consider vehicle occupancy. Under given traffic conditions, the use of the proposed method allows for reducing the average time losses per person in the modelled road network.","PeriodicalId":43740,"journal":{"name":"Scientific Journal of Silesian University of Technology-Series Transport","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44412045","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：