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Assembly Line Overall Equipment Effectiveness (OEE) Prediction from Human Estimation to Supervised Machine Learning

János Jósvai Péter Dobra

Publication Name: Journal of Manufacturing and Materials Processing

Publication Date: 2022-06-01

Volume: 6

Issue: 3

Page Range: Unknown

Description:

Nowadays, in the domain of production logistics, one of the most complex planning processes is the accurate forecasting of production and assembly efficiency. In industrial companies, Overall Equipment Effectiveness (OEE) is one of the most common used efficiency measures at semi-automatic assembly lines. Proper estimation supports the right use of resources and more accurate and cost-effective delivery to the customers. This paper presents the prediction of OEE by comparing human prediction with one of the techniques of supervised machine learning through a real-life example. In addition to descriptive statistics, takt time-based decision trees are applied and the target-oriented OEE prediction model is presented. This concept takes into account recent data and assembly line targets with different weights. Using the model, the value of OEE can be predicted with an accuracy of within 1% on a weekly basis, four weeks in advance.

Open Access: Yes

DOI: 10.3390/jmmp6030059

Life Cycle Assessment Perspective for Sectoral Adaptation to Climate Change: Environmental Impact Assessment of Pig Production

Kennedy Ndue Goda Pál

Publication Name: Land

Publication Date: 2022-06-01

Volume: 11

Issue: 6

Page Range: Unknown

Description:

Growing demand for sustainably driven production systems, especially pork, requires a holistic or system thinking approach. Life Cycle Thinking (LCT) offers a robust methodological background as one of the approaches to achieving system analysis for a product along its lifecycle. On the other hand, Life Cycle Assessment (LCA) can perform state-of-art system analysis charac-terising its sustainability fronts as a compelling set of tools. Pork, as the most consumed meat across Europe (circa 34 kg per capita per year), compounded with the sector’s contribution to global greenhouse gases (GHG) doubling over the past decade necessitated this research. Our objective was to map hotspots along the value chain and recommend the best available practices for realising the sectoral contribution to carbon neutrality and climate change adaptation. To achieve the objective, we compared organic and conventional production systems by basing our analysis on Recipe midpoint 2016 (H) V1.13 as implemented in OpenLCA 1.10.2 using AGRIBALYSE® 3.0 datasets for eleven indicators. We found that producing 1 kg of pig meat under an organic production system had almost double the environmental impact of conventional systems for land use, water consump-tion, acidification, and ecotoxicity. Feed production and manure management are the significant hotspots accounting for over 90% of environmental impacts associated with 1 kg pig meat Live-weight (LW) production. Similarly, efficient conventional systems were less harmful to the environment in per capita unit of production and land use compared with organic ones in ten out of the eleven impacts evaluated. Implementing increased efficiency, reduced use of inputs for feed pro-duction, and innovative manure management practices with technological potential were some of the best practices the research recommended to realise minimal impacts on the identified hotspots.

Open Access: Yes

DOI: 10.3390/land11060827

Thermal and Sliding Wear Properties of Wood Waste-Filled Poly(Lactic Acid) Biocomposites

Amar Patnaik László Lendvai Lalit Ranakoti Tej Singh Gabor Dogossy

Publication Name: Polymers

Publication Date: 2022-06-01

Volume: 14

Issue: 11

Page Range: Unknown

Description:

In our study, the effects of wood waste content (0, 2.5, 5, 7.5, and 10 wt.%) on thermal and dry sliding wear properties of poly(lactic acid) (PLA) biocomposites were investigated. The wear of developed composites was examined under dry contact conditions at different operating parameters, such as sliding velocity (1 m/s, 2 m/s, and 3 m/s) and normal load (10 N, 20 N, and 30 N) at a fixed sliding distance of 2000 m. Thermogravimetric analysis demonstrated that the inclusion of wood waste decreased the thermal stability of PLA biocomposites. The experimental results indicate that wear of biocomposites increased with a rise in load and sliding velocity. There was a 26–38% reduction in wear compared with pure PLA when 2.5 wt.% wood waste was added to composites. The Taguchi method with L25 orthogonal array was used to analyze the sliding wear behavior of the developed biocomposites. The results indicate that the wood waste content with 46.82% contribution emerged as the most crucial parameter affecting the wear of PLA biocomposites. The worn surfaces of the biocomposites were examined by scanning electron microscopy to study possible wear mechanisms and correlate them with the obtained wear results.

Open Access: Yes

DOI: 10.3390/polym14112230

Complex Ice Hockey Team Performance Model based on Expert Interviews

Laszlo Imre Komlosi Gergely Géczi Lilla Gurisatti

Publication Name: Physical Culture and Sport Studies and Research

Publication Date: 2022-06-01

Volume: 95

Issue: 1

Page Range: 76-84

Description:

Scientific research focusing on ice hockey is growing, although a complex model describing team performance is yet to be added to the knowledge base. The purpose of the study is to finalize the authors' proposed model of ice hockey team performance and gain insights on how the included factors contribute to the operation of the team and the coach. Based on the processed literature, it was assumed that the psychological aspect is among the key factors contributing to team performance. Semi-structured interviews were conducted with highly qualified experts on Hungarian ice hockey (five national team coaches and five senior national team players). The results indicate that the psychological factors of the coach and the team are essential for high team performance, along with the influence ability of both sides, creating two-way communication and feedback loops. The practical knowledge of the coach was emphasized over theoretical knowledge, and the team's tactical knowledge was emphasized over technical knowledge. It also emerged that the coach must know the team well in order to make appropriate decisions. The role of the coach is no longer to act as a stressor, but rather to set a good example as a role model while remaining open to feedback from the team's side. It was concluded that although many psychological methods are available to improve performance, the use of these methods has not yet been sufficiently exploited. While the use of these methods could improve performance, the team could experience more success and make sporting activity a fundamental part of players' health through bonding and belonging.

Open Access: Yes

DOI: 10.2478/pcssr-2022-0013

Sustainable and Innovative Cross-Border Regional Development with Focus on Tourism in the Danube Basin—A Case-Study of Szigetköz and Csallóköz (Žitný Ostrov)

Dávid Fekete Petra Kinga Kézai Mihály Dömötör

Publication Name: Sustainability Switzerland

Publication Date: 2022-06-01

Volume: 14

Issue: 12

Page Range: Unknown

Description:

The current paper aims to analyze the Hungarian–Slovakian cross-border area (Szigetköz, Csallóköz) and unearth the region’s latent economic development potential. The study area with its unique natural environment has recently aroused the interest of many fields. Szigetköz is a fresh spot in the agglomeration of two large cities: Győr and Mosonmagyaróvár. What could be the economic bases and social factors that can awaken the area from its sleeping rose dream? Along with this issue, we explore socio-economic development opportunities. The exploratory research is based on content analysis of strategic documents and in-depth interviews with the settlement’s mayors. The results show that, although the overwhelming majority of settlements have a more moderate population loss and an abundance of economic opportunities relative to other Hungarian settle-ments, there are several gaps and negative processes that operate beneath the surface.

Open Access: Yes

DOI: 10.3390/su14127037

Development and characterization of composites produced from recycled polyethylene terephthalate and waste marble dust

Ferenc Ronkay László Lendvai Vishal Ahlawat Guangming Wang Sicong Zhang Shaofeng Guo Tej Singh

Publication Name: Polymer Composites

Publication Date: 2022-06-01

Volume: 43

Issue: 6

Page Range: 3951-3959

Description:

The current paper presents the results of a study on the processing and characterization of waste marble powder-reinforced recycled polyethylene terephthalate (rPET) composites. Samples with up to 20 wt% marble dust (MD) content were produced with twin-screw extrusion followed by injection molding. Subsequently, the morphological and mechanical features and the wear resistance of the developed composites were studied. In terms of mechanical properties, the incorporation of MD steadily improved both the tensile and flexural modulus of rPET, while the strength values showed an optimum at 2.5–5.0 wt%, depending on the mode of loading. Above the optimal MD concentration, the strength values deteriorated, however, even at maximum (20 wt%) marble content they were still similar to that of neat rPET, which proves the potential of utilizing waste MD in this specific polymer as filler material. The surface hardness of the fabricated samples also gradually improved with higher marble content, yet it came at the cost of impact toughness. The analysis of wear performance revealed an increasing resistance against wear up to 5.0 wt% filler loading, above which the dust particles got easily peeled off from the matrix, decreasing its efficiency.

Open Access: Yes

DOI: 10.1002/pc.26669

A bibliometric analysis of humanitarian logistics

John G. Keogh Abderahman Rejeb Karim Rejeb

Publication Name: Acta Technica Jaurinensis

Publication Date: 2022-05-25

Volume: 15

Issue: 2

Page Range: 74-90

Description:

Recent years have seen a surge in interest in humanitarian logistics (HL) research. This study conducted a bibliometric analysis of 894 HL-related studies. The publications were chosen using a combination of keywords from their titles, abstracts and author-supplied keywords from the leading database Scopus. The publications were classified according to their publication year, country of origin, type of publication, most relevant journals, and most influential authors. The review’s findings indicate that over a four-decade period, HL research progressed through three distinct stages. In terms of national contribution, the United States of America leads with the most studies published on HL. Additionally, the HL literature is advanced primarily through academic journal articles. The Journal of Humanitarian Logistics and Supply Chain Management is the leading journal in the field, with 148 articles published. The study makes a significant contribution by providing relevant analysis that may inform and guide scholars and researchers as they explore the evolution of HL research and foster networking and collaboration opportunities across multiple institutions.

Open Access: Yes

DOI: 10.14513/actatechjaur.00647

The Internet of Things and the circular economy: A systematic literature review and research agenda

Horst Treiblmaier Suhaiza Zailani Abderahman Rejeb Karim Rejeb Zailani Suhaiza Stefan Seuring

Publication Name: Journal of Cleaner Production

Publication Date: 2022-05-20

Volume: 350

Issue: Unknown

Page Range: Unknown

Description:

In recent years, the concept of a circular economy (CE) has gained importance and attracted significant attention among scholars and practitioners. Research that examines the role of modern technologies in supporting the transition from a linear economy to the CE is therefore highly needed. This article analyzes and classifies existing research at the intersection of the CE and the Internet of Things (IoT), as an enabling technology. While studies on both concepts have proliferated, there is a lack of research that systematizes the literature and clarifies the relationship between the IoT and the CE. In order to achieve this, we reviewed a total of 170 academic articles published between 2007 and 2021 from the Scopus and Web of Science databases. Based on the coding of keywords, four categories can be identified: (1) IoT-related technologies in the CE context, (2) enablers of IoT in the CE, (3) barriers to IoT adoption in the CE, and (4) the impacts of the IoT on the sustainability of (circular) economies. The current study is the first attempt to use a keyword coding approach to better understand IoT research in the CE domain. The review findings identify important drivers and enablers and provide a structured framework for research in this field. Finally, this study highlights several research directions that may provide valuable insights for researchers and practitioners.

Open Access: Yes

DOI: 10.1016/j.jclepro.2022.131439

The partial mediating role of supply chain integration between Industry 4.0 and supply chain performance

Zoltan Szegedi Işık Özge Yumurtacı Hüseyinoğlu Gizem Erboz

Publication Name: Supply Chain Management

Publication Date: 2022-05-06

Volume: 27

Issue: 4

Page Range: 538-559

Description:

Purpose: Industry 4.0 not only impacts the manufacturing industry but also supply chain practices. Drawing on the resource-based view (RBV), the purpose of this paper is to examine how Industry 4.0 affects supply chain integration (SCI) and supply chain performance (SCP). Design/methodology/approach: The data were collected from 212 respondents in manufacturing companies. The partial least square structural equation modelling (PLS-SEM) was used to test the hypotheses of this study. Findings: The findings reveal that Industry 4.0 has a positive impact on SCI and SCP, and SCI has a positive impact on SCP. In addition, a partial mediating role of SCI has been found between Industry 4.0 and SCP. Practical implications: This study reveals the role of Industry 4.0 on supply chain practices and draws attention to SCI in the linkage between Industry 4.0 and SCP. The findings emphasise the need for Industry 4.0 and SCI to enhance SCP. Originality/value: There is limited research on the impacts of Industry 4.0 on SCI and SCP. This research finds empirical evidence for these impacts and enhances knowledge of Industry 4.0 by using a sample from an emerging country.

Open Access: Yes

DOI: 10.1108/SCM-09-2020-0485