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This issue of the RECENT journal was edited with the support of: ContentsSectoral Needs Analysis to Develop Training Programs for Hybrid and Electric Vehicles
RECENT J. (2023), 70:084-094 https://doi.org/10.31926/RECENT.2023.70.084 Abstract Car manufacturers worldwide are switching to hybrid and electric vehicle production models, which are cleaner and more sustainable alternatives. This rapid change situation has also significantly increased the need to maintain and repair these vehicles. Professionals in the motor vehicle maintenance and service industry must be up-to-date on the technological developments that occur with these increases and the critical safety measures on these vehicles. Within the scope of this study, a comprehensive training needs analysis was conducted to determine the vocational education and training needs of those working in the field of hybrid and electric vehicle technologies, and the findings were evaluated. In the study, 30 questions on a 5-point Likert scale were applied to the participants, which was structured under the headings of perception, knowledge, skills, and expectations about hybrid and electric vehicle education. 54 sector representatives, 650 students, and 652 vocational high school teachers and administrators participated in the surveys. Interestingly, in the needs analysis results, all three groups provided a similar response in all questions; that is, they stated the exact needs. Therefore, the training programs to be developed based on these results will meet all three priority stakeholder groups' hybrid and electric vehicle training needs. Keywords electric vehicles, hybrid vehicles, vocational training, needs analysis Mechanical Crank Presses with a Modified Law of Motion of the Slide. A Patent Study
RECENT J. (2023), 70:095-112 https://doi.org/10.31926/RECENT.2023.70.095 Abstract The vast majority of mechanical presses are using a crank mechanism for converting the main shaft’s uniform rotation into a guided linear reciprocating motion. In many applications, the law of motion ensured by this mechanism is less than adequate, mainly because of the significant variation of slide velocity during the load stroke and the relatively small weighting of the duration of this part of the stroke in relation to the total time of a double stroke. Over time, researchers have conceived more complex conversion mechanisms for mechanical presses, like bar mechanisms that combine crank and four-bat mechanisms in various configurations in order to determine laws of motion of the slide as close as possible to an imposed or assumed optimum. Based on examples from patents and utility models, the paper presents conversion bar mechanisms, double composed and triple composed, designed for mechanical presses in order to ensure the most favourable law of motion of the slide for various applications. Keywords mechanical press, law of motion, transformation mechanism Composite Materials Market Research and Export Potential Analysis: A Regio-Global Case Study
RECENT J. (2023), 70:113-121 https://doi.org/10.31926/RECENT.2023.70.113 Abstract In today's global markets, there is a growing demand for high-value composite products. Over the past decade, many countries have shifted their production processes towards these products in order to boost their competitiveness in the global economy. This study aims to examine the current state of the composite industry in Turkey, with a particular focus on Bursa, a major hub for the automotive industry. The analysis includes an assessment of global trade volumes, import-export data, and Turkey's position within this sector. In addition, the study explores current technology and market trends related to composite products. According to the data, Turkey's exports of composite materials increased by 19.48% in 2021 compared to the previous year, reaching 2.7 billion. By calculating the Grubel-Lloyd Index, the study finds that intra-industry trade in Turkey's composite materials product groups is mostly two-way, with a few exceptions. The average index value for composite materials was measured to be 0.6890. Keywords composite materials, market analysis, high-value-added, Grubel-Lloyd index, Bursa The Influence of the Over-Aging in 7075 Aluminium Alloy Plates on the Corrosion Behaviour
RECENT J. (2023), 70:122-127 https://doi.org/10.31926/RECENT.2023.70.122 Abstract A study for establishing the influence of the duration of the artificial aging heat treatment stage on the intergranular corrosion for 7075 aluminium alloy, T651 temper was carried out. Therefore, several tests were conducted by increasing the duration of the holding time in the Artificial Aging Heat Treatment from 10 hours to 20 hours, at every two hours. The experiments were done on 7075 aluminium alloy plate with a thickness of 30 mm. A dependence of the intergranular corrosion on the holding time of the artificial aging treatment was established, thus more than 37 minimum holding hours are needed for the 7075 aluminium alloy plates to have corrosion problems, which is very difficult to achieve in practice. Keywords over-aging, 7075 aluminium alloy, corrosion Design Process with Innovative Technologies for Intelligent Buildings
RECENT J. (2023), 70:128-131 https://doi.org/10.31926/RECENT.2023.70.128
Abstract An intelligent building needs to be designed to meet the needs of initial occupants and be flexible to meet the needs of future occupants. Creating an intelligent building does require an investment in advanced technology, processes, and solutions. An ingenuous investment is required to realize a significant return later on. It is unrealistic to expect to make a project intelligent unless there is early acquisition in on investment. Over, these decisions need to be made prior to the start of design work. One of the challenges is to educate owners on the benefits of an intelligent building design. This makes the education of both owners and architects about the benefits of intelligent solutions significant for success. Keywords innovative design process, future housing, open-building Competitiveness Factors in Textiles and Composites Industry and Transformation into Value-Added Products
RECENT J. (2023), 70:132-141 https://doi.org/10.31926/RECENT.2023.70.132
Abstract The world economy is significantly impacted by the textile and composites business, which is well-established in many nations. Many variables, including production costs, technology, product quality, innovation, and sustainability, affect how competitive this sector is. An important aspect in the industry's growth is the conversion of these factors into goods with value added. The cost of production is one of the key competitiveness considerations in the textile and composites sector. The sector requires a lot of manpower, thus increasing production efficiency, cutting waste, and streamlining the supply chain can lower production costs. Technology is another important component since it makes it possible to produce high-quality items with better functionality and performance. Innovation is also essential for competitiveness because it enables businesses to set their products apart from those of rivals and adjust to shifting consumer demands. Sustainability is a crucial component because customers want more environmentally friendly items. Businesses that use sustainable methods can cut expenses, boost productivity, and draw in eco-aware customers. The growth and success of the textiles and composites business depend on the ability to turn these competitiveness characteristics into products with value added. Value-added goods distinguish themselves from commodity goods by offering special characteristics, capabilities, and advantages. In turn, this enables businesses to charge higher prices and make bigger profits. Keywords competitiveness, textiles, composites, high-value-added, sustainability, Bursa Application of FMEA Method Comparative with ELECTRE Method in Preventive Maintenance of CNC Lathe
RECENT J. (2023), 70:142-147 https://doi.org/10.31926/RECENT.2023.70.142
Abstract Failure mode and effects analysis (FMEA) is one of the most popular reliability analysis tools for identifying, assessing, and eliminating potential failure modes in a wide range of industries. In general, failure modes in FMEA are evaluated and ranked through the risk priority number (RPN), which is obtained by the multiplication of crisp values of the risk factors, such as the occurrence (O), severity (S), and detection (D) of each failure mode. However, the crisp RPN method has been criticized to have several deficiencies. In this paper, results obtained with the FMEA method are checked, using a method from decision theory, respectively the ELECTRE method, both applied for prioritizing the failures that could appear in the functioning of Turn 55 CNC lathe. Two case studies have been shown to demonstrate the methodology thus developed. It is illustrated a parallel between the results obtained by the traditional method FMA and ELECTRE method for determining the potential failures with the highest risk of occurrence in order to prevent them. The results show that the proposed approach somewhat modifies the obtained results and leads to the conclusion that other developments of the two methods are necessary, using fuzzy sets for the accuracy of the results. Keywords preventive maintenance, FMEA method, ELECTRE method, CNC lathe Medical Management of Blockchain, Patients, and Clinical Studies
RECENT J. (2023), 70:148-154 https://doi.org/10.31926/RECENT.2023.70.148
Abstract There are procedures and rules that must be followed throughout clinical examinations and investigation, which is a lengthy, intricate procedure. From the early registration processes, informed consent, clinical data, and the moment at which post-marketing authorisation is granted, and publishing, there are concerns regarding the openness of clinical research data. As a result, persons using authorized medications have had various effects, some of which have been deadly. These impacts are said to appear as fraud, bad conduct, selective reporting, bias, and other things. It has also been challenging to get access to research data from people participating within clinical studies include patients and even academics who could be intrigued by the post-marketing period and pharmacological analyses. Data gathered from reliable sources that highlight the registration-related risks are offered as evidence. A current illustration of how lack of openness has led to a severe problem with opioid usage is a conscious decision and the manner in which clinical study results are publicized considering the usage of blockchain is being considered as a mechanism or framework for clinical research institutions, regulatory and non-regulatory bodies, pharmaceutical associations, medication manufacturers/suppliers, and patients. In order to address the difficulties raised, this article introduces a theoretical model that proposes how blockchain might give a more open and secure solution. Keywords clinical trials, fraud and misconduct, blockchain, integrity of data, wearable with traceability
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