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Assessing the actuality and relevant importance of Deming’s 14 points
Get PDFDeming’s 14 points summarize the main challenges of corporate management to change for the 1980s, but the teaching may still be actual. Recent crises have drawn attention to the need to rethink and refine business. Leadership and organization have a crucial role in responding appropriately to environmental changes. The study uses an online survey to assess the relative importance of 14 points among higher education students. The analysis used the Q-methodology. The results suggest competing opinion patterns about the importance of the points. Still, there is an agreement about the key relevance of constantly improving every process for planning, production, and service as well as instituting training on the job. At the same time, the respondents significantly agreed that eliminating numerical quotas cannot be considered indispensable.Deming’s 14 points summarize the main challenges of corporate management to change for the 1980s, but the teaching may still be actual. Recent crises have drawn attention to the need to rethink and refine business. Leadership and organization have a crucial role in responding appropriately to environmental changes. The study uses an online survey to assess the relative importance of 14 points among higher education students. The analysis used the Q-methodology. The results suggest competing opinion patterns about the importance of the points. Still, there is an agreement about the key relevance of constantly improving every process for planning, production, and service as well as instituting training on the job. At the same time, the respondents significantly agreed that eliminating numerical quotas cannot be considered indispensable
Robotic systems for advanced additive manufacturing
Get PDFAdditive manufacturing (AM) has revolutionized the way we layout and manufacture products. The inception of complicated geometries immediately from virtual models gives more freedom and flexibility. However, AM systems have boundaries in terms of building volume, space, and the capability to manufacture multi-material and multi-practical items. A mixture of robotics and AM has emerged as a promising solution. The robotic tool of AM expands its capabilities via the growing toolpath strategies and robotic trajectories, paving the way for the advent of large, more complicated, and functionally included factors. This review paper explores the current-day robotic structures of AM, outlining advantages and challenges, and highlighting studies’ achievements.Additive manufacturing (AM) has revolutionized the way we layout and manufacture products. The inception of complicated geometries immediately from virtual models gives more freedom and flexibility. However, AM systems have boundaries in terms of building volume, space, and the capability to manufacture multi-material and multi-practical items. A mixture of robotics and AM has emerged as a promising solution. The robotic tool of AM expands its capabilities via the growing toolpath strategies and robotic trajectories, paving the way for the advent of large, more complicated, and functionally included factors. This review paper explores the current-day robotic structures of AM, outlining advantages and challenges, and highlighting studies’ achievements
Remarks on access to justice and the digital divide from the aspect of procedural law
Get PDFThe COVID-19 pandemic has proved that the use of electronic means can significantly facilitate effective, physical access to justice and simplify the initiation and conduct of court proceedings; however, the phenomenon of digital divide has entered into centre of attention as well. The current paper aims to give a summary on the concept of digital divide in the context of procedural rights, primarily the right to an efficient access to justice. It will be examined, how digital solutions can be integrated into the conceptual and legislative framework of access to justice so that they can contribute to the enhancement of efficiency, while preventing the marginalization of the most disadvantaged social groups and the “elitization” of justice systems. The analysis is based on synthesis of international standards, jurisprudence, recommendations, and secondary literature. This way the results can provide an impetus for developing new solutions in this area to ensure the efficient access to justice for all even in the context of unprecedented technological, social and economic challenges.The COVID-19 pandemic has proved that the use of electronic means can significantly facilitate effective, physical access to justice and simplify the initiation and conduct of court proceedings; however, the phenomenon of digital divide has entered into centre of attention as well. The current paper aims to give a summary on the concept of digital divide in the context of procedural rights, primarily the right to an efficient access to justice. It will be examined, how digital solutions can be integrated into the conceptual and legislative framework of access to justice so that they can contribute to the enhancement of efficiency, while preventing the marginalization of the most disadvantaged social groups and the “elitization” of justice systems. The analysis is based on synthesis of international standards, jurisprudence, recommendations, and secondary literature. This way the results can provide an impetus for developing new solutions in this area to ensure the efficient access to justice for all even in the context of unprecedented technological, social and economic challenges
Tensile strength and failure behaviour of clinched joint in cross-tension specimens of similar aluminium alloy sheets
Get PDFThis research investigates experimentally the tensile strength and failure behaviour of clinched joints in cross-tensile specimens made of similar aluminium Al5457-H22 alloy sheets. The cross-tensile specimens were joined by clinching using different tool geometry parameters, and the tensile strength behaviours of the joined sheets were investigated under various tool geometry parameters. Meanwhile, the influence of the tool geometry parameters on the tensile strength was recorded experimentally. Additionally, the failure mechanism was studied under static loading conditions. As a result, macroscopic observation showed that clinched joints’ pull-out failure mode with a circumferential direction crack was observed on a punch fillet radius of 0.3 mm and a punch angle of 2o, which mainly failed due to kinked cracks through the upper sheet thickness. Thus, the cross-tensile specimen test can be an excellent method to analyse the failure behaviour of the clinched joint of aluminium sheets subjected to pure tension.This research investigates experimentally the tensile strength and failure behaviour of clinched joints in cross-tensile specimens made of similar aluminium Al5457-H22 alloy sheets. The cross-tensile specimens were joined by clinching using different tool geometry parameters, and the tensile strength behaviours of the joined sheets were investigated under various tool geometry parameters. Meanwhile, the influence of the tool geometry parameters on the tensile strength was recorded experimentally. Additionally, the failure mechanism was studied under static loading conditions. As a result, macroscopic observation showed that clinched joints’ pull-out failure mode with a circumferential direction crack was observed on a punch fillet radius of 0.3 mm and a punch angle of 2o, which mainly failed due to kinked cracks through the upper sheet thickness. Thus, the cross-tensile specimen test can be an excellent method to analyse the failure behaviour of the clinched joint of aluminium sheets subjected to pure tension
Legal drug use patterns of adolescents in northern Hungary
Get PDFIn a quantitative cross-sectional study, the authors investigated the health risk behaviour of secondary school students in northern Hungary, including the consumption of legal psychoactive substances (nicotine, alcohol, caffeine). In addition to assessing substance use habits, the study should also assess mental health characteristics and examine the correlates of substance use. A total of 1251 respondents (n= 1251) took part in the survey (mean age: 16.4 years; SD: 1.6), with 59.1% of the sample being boys. The questionnaire included questions on socio-demographic data, nicotine and alcohol consumption, frequency of consumption, motivation for alcohol consumption and mental health characteristics. The results indicate that the intensity of smoking and alcohol consumption is highest in the 16-17 years old age group, with a higher prevalence of smoking among girls and alcohol consumption among boys. For smoking, lower parental education and poorer mental health are the main risk factors, and for alcohol consumption, lower parental education, a smaller settlement, poorer living conditions and poorer mental health are the main risk factors.In a quantitative cross-sectional study, the authors investigated the health risk behaviour of secondary school students in northern Hungary, including the consumption of legal psychoactive substances (nicotine, alcohol, caffeine). In addition to assessing substance use habits, the study should also assess mental health characteristics and examine the correlates of substance use. A total of 1251 respondents (n= 1251) took part in the survey (mean age: 16.4 years; SD: 1.6), with 59.1% of the sample being boys. The questionnaire included questions on socio-demographic data, nicotine and alcohol consumption, frequency of consumption, motivation for alcohol consumption and mental health characteristics. The results indicate that the intensity of smoking and alcohol consumption is highest in the 16-17 years old age group, with a higher prevalence of smoking among girls and alcohol consumption among boys. For smoking, lower parental education and poorer mental health are the main risk factors, and for alcohol consumption, lower parental education, a smaller settlement, poorer living conditions and poorer mental health are the main risk factors
Innovative cooling solutions of HPDC technology
Get PDFIn High Pressure Die Casting (HPDC), the so-called sliders are moving components of the mould, that can form cavities, holes, and undercuts. Sliders differ greatly from fixed- and moving mould halves regarding cooling and thermal balance. Typically, mould halves can range from a few hundred kilograms to several tonnes in size, whereas sliders have a significantly lower mass, and therefore their thermal balance changes much more drastically during casting cycles. Sliders can also be used to improve local heat dissipation in different areas. They are equipped with cooling holes through which the hole-forming cores, which penetrate deep into the mould cavity, can be tempered so that a significant amount of heat can be removed from the solidifying metal during the mould-filling process. As the industry produces increasingly complex castings, the cooling systems for the various moulds, inserts and cavities have evolved accordingly as the complexity of the castings has increased. This has resulted in innovative solutions and developments in the cooling of moulds and mould inserts, such as the use of 3D-printed metal inserts with improved heat dissipation. This article compares the cooling differences between traditionally cooled and 3D-printed sliders. We investigate cooling efficiency and tool temperatures at different cooling intensities through simulation experiments. Furthermore, at the end of the solidification phase, we examine the mold temperatures and the heat extracted for different molds and cooling intensities.In High Pressure Die Casting (HPDC), the so-called sliders are moving components of the mould, that can form cavities, holes, and undercuts. Sliders differ greatly from fixed- and moving mould halves regarding cooling and thermal balance. Typically, mould halves can range from a few hundred kilograms to several tonnes in size, whereas sliders have a significantly lower mass, and therefore their thermal balance changes much more drastically during casting cycles. Sliders can also be used to improve local heat dissipation in different areas. They are equipped with cooling holes through which the hole-forming cores, which penetrate deep into the mould cavity, can be tempered so that a significant amount of heat can be removed from the solidifying metal during the mould-filling process. As the industry produces increasingly complex castings, the cooling systems for the various moulds, inserts and cavities have evolved accordingly as the complexity of the castings has increased. This has resulted in innovative solutions and developments in the cooling of moulds and mould inserts, such as the use of 3D-printed metal inserts with improved heat dissipation. This article compares the cooling differences between traditionally cooled and 3D-printed sliders. We investigate cooling efficiency and tool temperatures at different cooling intensities through simulation experiments. Furthermore, at the end of the solidification phase, we examine the mold temperatures and the heat extracted for different molds and cooling intensities
Effect of the solidification front velocity on the microstructure of the eutectic in a hypereutectic Al-Si alloy
Get PDFThe aluminium-silicon (Al-Si) alloys are widely used, and in combination with the appropriate mechanical properties, they are attractive raw materials even for the automobile and aircraft industries. Its eutectic has an irregular structure, which makes its classification challenging. The silicon phase of the eutectic has a lamella morphology, which can be modified by various interventions. Their microstructure can be influenced by changes in solidification parameters, such as flows induced by a rotating magnetic field (RMF), changes in the movement velocity of the solidification front, and changes in the temperature gradient. During our work, we dealt with an Al–Si 18% hypereutectic alloy stirred (7.2 mT) and not stirred by the rotating magnetic field. The experiments were performed at different sample moving velocities, and the eutectic of the samples was examined using image analysis software.The aluminium-silicon (Al-Si) alloys are widely used, and in combination with the appropriate mechanical properties, they are attractive raw materials even for the automobile and aircraft industries. Its eutectic has an irregular structure, which makes its classification challenging. The silicon phase of the eutectic has a lamella morphology, which can be modified by various interventions. Their microstructure can be influenced by changes in solidification parameters, such as flows induced by a rotating magnetic field (RMF), changes in the movement velocity of the solidification front, and changes in the temperature gradient. During our work, we dealt with an Al–Si 18% hypereutectic alloy stirred (7.2 mT) and not stirred by the rotating magnetic field. The experiments were performed at different sample moving velocities, and the eutectic of the samples was examined using image analysis software
Gótikus mikroarchitekturális alkotások 3D szkennelésének módszerei és problémái
Get PDFIn the course of the current research, Gothic buildings and micro-architectural works (tabernacles, altar canopies) in Eastern Slovakia and Northeast Hungary were 3D scanned to investigate the procedural nature of Gothic architecture. The study of these micro-architectures is of outstanding importance, as Gothic geometrical rules were applied uniformly at both the architectural and micro-architectural levels. Traditional laser scanner, photo scanning, photo scanning with an iPhone, and lidar were used in the research, with different advantages and challenges. The experience gained during the research and the comparison of different scanning methods contribute to a more accurate documentation and understanding of Gothic micro-architecture and thus Gothic architecture.A gótikus építészet procedurális jellegének vizsgálata során gótikus épületek és mikroarchitekturális alkotások (szentségházak, oltárkoronák) 3D-szkennelését végeztem el Kelet-Szlovákia és Északkelet-Magyarország területén. Ezen mikroarchitektúrák vizsgálata kiemelkedő fontosságú, mivel a gótikus geometriai szabályok egységesen érvényesültek mind az építészet, mind a mikroarchitektúra szintjén. A kutatás során alkalmazott 3D-szkennelési módszerek – hagyományos lézerszkenner, fotószkennelés, fotószkennelés iPhone-nal, lidar-szkennelés – különböző előnyökkel és kihívásokkal jártak. A kutatás során szerzett tapasztalatok és a különböző szkennelési módszerek összehasonlítása hozzájárulnak a gótikus mikroarchitektúra és így a gótikus építészet pontosabb dokumentálásához és megértéséhez
A Nationwide Assessment of Kuwaitis’ Compliance with Preventative Measures During the COVID-19 Epidemic
Get PDFThe COVID-19 pandemic has had far-reaching consequences for world health, economics, and society. To prevent the virus's spread, non-pharmacological therapies such as social distancing, mask-wearing, and cleanliness practices have been employed. The purpose of this study was to analyze the Kuwaiti population's adherence to precautionary measures during the epidemic. A cross-sectional study was carried out with the use of a self-administered online questionnaire issued to Kuwaitis aged 18 and up. The questionnaire included demographic questions as well as questions on preventative behaviors. Descriptive statistics, chi-square analysis, and multivariate regression analysis were used to examine the data. The findings revealed that 54.8% of individuals had good behaviors, with hand cleanliness being the most prevalent and eating a healthy diet being the least common. Chronic illnesses, a history of COVID-19 infection, and the COVID-19 vaccine were all linked to practice levels. Regression analysis demonstrated that COVID-19 infection enhanced the likelihood of adherence to preventative measures considerably. The data indicate that, while a sizable majority of the Kuwaiti population engaged in beneficial activities, there is still space for improvement, particularly in terms of adopting a better diet. Future efforts should concentrate on marketing and educating the public about the relevance of COVID-19 prevention measures
Exploring uncertainty in flow unit identification and permeability prediction
Get PDFThe study proposes a comparative uncertainty analysis of the main methods for permeability prediction or estimation, including the Cluster analysis (K-means), the Kozeny-Carman (KyC) equation for flow unit identification, and the K-nearest neighbor Density Estimate (KNN) algorithm, Kozeny-Carman equation, and One Flow Unit (OFU) for permeability prediction or estimation. The proposed analysis is applied to 13 wells in the Sacha field located in the Amazon region of Ecuador, targeting the Hollin and Napo formations, which mainly consist of sandstone, limestone, and shale. The selected wells have a sufficient number of laboratory measurements of permeability and electrical logs of porosity, permeability, natural gamma ray, medium, and deep resistivity. Initially, the K-means clustering and KyC methods are applied to identify the flow units, followed by a regression process to calculate the permeability using the KNN, KyC, and OFU methods. During the clustering process, the KyC method yielded better results, with the experimental data exhibiting uncertainties of less than ±35 mD, except in the outlier flow unit with an average porosity of 16.86% ±3.87% (Flow Unit D) whose average permeability is 407.52 mD and uncertainty of ±504.10 mD. For software simulation purposes, it is recommended to utilize the KyC method, as it employs basic concepts and equations in accordance with hydraulic principles