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Effect of temperature changes on the vibration transmissibility of xpe and pe packaging cushioning material

Péter Böröcz Péter Csavajda

Publication Name: Applied Sciences Switzerland

Publication Date: 2021-01-02

Volume: 11

Issue: 2

Page Range: 1-18

Description:

Polyethylene (PE) and its variations are among the most traditional materials used for cushioning in packaging systems. The role of these materials is to prevent damages during handling and distribution processes from physical events such as vibration stress. This study presents new results on the characterization of properties of PE and XPE (cross-linked polyethylene) packaging materials, which have significant relevance as a protective mechanism due to their vibration transmissibility and frequency curve properties. The main goal of this study is the evaluation of vibration transmissibility of PE and XPE cushion material at varied real temperature and static load conditions through a series of experiments using a vibration tester and climate chamber to determine the peak frequencies, vibration transmissibility, and damping ratios. The results can be used by engineers in the package-design process, and can be useful in different distribution conditions. Three different kinds of static loads and a 0.5 oct/min sine sweep of vibration test were used to find the peak frequencies and vibration transmissibility at −20◦C, 0◦C, 20◦C and 40◦C to estimate the damping ratios. The results provided a better understanding of the materials and can assist in the design of suitable protective packaging systems.

Open Access: Yes

DOI: 10.3390/app11020482

Investigations among family businesses operating in the settlement of the Transdanubia region

Csilla Polster Konczosné Szombathelyi Márta

Publication Name: Civil Szemle

Publication Date: 2021-01-01

Volume: 18

Issue: 2

Page Range: 21-34

Description:

This paper presents the role of family businesses in strengthening social capital. Its aim is to examine the impact of these enterprises on local society and their role in local society. In this paper, after the interpretation of family businesses, social capital, embedding, and local society, the impact of the examined family businesses on local society is presented. The method of this study was in-depth interviews conducted among the owners of 207 family businesses in Transdanubia counties: 128 in villages and small towns, and 79 in medium-sized and large cities were conducted. In the framework of the interviews, therelations of family businesses at the local level, their relations with social organizations, their identity and attachments, and their embeddedness were explored. The main results of the in-depth interviews are that in three of the five indicators examined, in the smaller settlements the embedded family companies have a stronger embeddedness and con-nection with the local society, in one case it is equally high. However, family businesses in larger settlements also have a very significant impact on local society, in terms of trust, reputation, family values, community relations and collaborations, social networking, and local identity

Open Access: Yes

DOI: DOI not available

Checking the accuracy of siitperf

Gábor Lencse

Publication Name: Infocommunications Journal

Publication Date: 2021-01-01

Volume: 13

Issue: 2

Page Range: 2-9

Description:

Siitperf is the world’s first free software RFC 8219 compliant SIIT (Stateless IP/ICMP Translation, also called as Stateless NAT64) tester, which implements throughput, frame loss rate, latency and packet delay variation tests. In this paper, we show that the reliability of its results mainly depends on the accuracy of the timing of its frame sender algorithm. We also investigate the effect of Ethernet flow control on the measurement results. Siitperf is calibrated by the comparison of its results with that of a commercial network performance tester, when both of them are used for determining the throughput of the IPv4 routing of the Linux kernel.

Open Access: Yes

DOI: 10.36244/ICJ.2021.2.1

Serratia fajok jellemzése, valamint Serratia marcescens kvalitatív kimutatása nyers és pasztőrözött tejből polimeráz láncreakción alapuló vizsgálati módszerrel

E. Korcz Z. Kerényi László Varga

Publication Name: Elelmiszervizsgalati Kozlemenyek

Publication Date: 2021-01-01

Volume: 67

Issue: 2

Page Range: 3441-3452

Description:

No description provided

Open Access: Yes

DOI: 10.52091/EVIK-2021/2-4-HUN

Are Halal Food Supply Chains Sustainable: A Review And Bibliometric Analysis

Suhaiza Zailani Abderahman Rejeb Karim Rejeb

Publication Name: Journal of Foodservice Business Research

Publication Date: 2021-01-01

Volume: 24

Issue: 5

Page Range: 554-595

Description:

Halal food supply chains (HFSCs) are increasingly characterized by fragmentation, complexity, and uncertainty. Halal food consumers are becoming more demanding for food quality and compliance with Islamic dietary law. As sustainability is a multidimensional concept that entails several aspects and interpretations, the objectives of HFSCs significantly overlap with the sustainable dimensions of the food ecosystem. The purpose of this study is to examine the inherent sustainable aspects and characteristics of HFSCs. Therefore, a systematic literature review and a bibliometric analysis were conducted to redress the lack of academic attention being given to the relationships of HFSCs with sustainability. Selected 74 papers were coded and analyzed according to the dimensions of sustainability, namely, the economic, social, and environmental dimensions. The review primarily attempts to provide answers to the following research question: What are the sustainable aspects of HFSCs? We provide a comprehensive analysis of the three critical components of sustainability, offering a broad and comprehensive picture of many critical issues in HFSCs. Finally, the contribution of the study, the scope of future research, and the limitations are highlighted in detail.

Open Access: Yes

DOI: 10.1080/15378020.2021.1883214

INVESTIGATION OF THE GLUED INSULATED RAIL JOINTS APPLIED TO CWR TRACKS

Szabolcs Fischer Attila Németh

Publication Name: Facta Universitatis Series Mechanical Engineering

Publication Date: 2021-01-01

Volume: 19

Issue: 4

Page Range: 681-704

Description:

This article summarizes the research results related to our own conducted extensive laboratory tests of polymer composite and steel fishplated glued insulated rail joints (GIRJs), namely axial tensile tests as well as vertical static and dynamic tests. The investigation dealt with the examination of GIRJs assembled with steel and special glass-fiber reinforced plastic (polymer composite) fishplates, both of them for CWR railway tracks (i.e. so-called gapless tracks or, in other words, railway tracks with continuously welded rails). The exact rail joint types were MTH-P and MTH-AP, consistently. The MTH P types have been commonly applied for many years in the CWR tracks in Europe, mainly in Hungary. The MTH-AP rail joints consist of fishplates that are produced by the APATECH factory (Russia). They are made of a fiberglass-amplified polymer composite material at high pressure and controlled temperature. This solution can eliminate electrical fishplate lock and early fatigue failures just as it can ensure adequate electrical insulation. The advantage of such rail joints can be that they are probably able to ensure the substitution of the glued insulated rail joints with relatively expensive steel fishplates currently applied by railway companies, e.g. Hungarian State Railways (MÁV). The aim of the mentioned research summarized in this paper is to formulate recommendations on technical applicability and on the technological instructions that are useful in everyday railway operation practice on the basis of the measurements and tests carried out on rail joints in laboratory.

Open Access: Yes

DOI: 10.22190/FUME210331040N

Experimental Study on Vibration Transmissibility of Pre-loaded XPE and PE Packaging Cushioning Material

Péter Böröcz Péter Csavajda

Publication Name: Fme Transactions

Publication Date: 2021-01-01

Volume: 49

Issue: 4

Page Range: 962-968

Description:

Most of the shipped products are sensitive against shock and vibration events during the distribution. Various cushioning materials are usually used to prevent the product damages. During the design process the protective packaging system is developed by the engineers based on the cushion and vibration transmissibility features (ie. cushion curve) of the material used. However, after the assembly of the packaged-product, these are stored for various long periods in warehouse. During this time the products pre-load the cushioning material and its parameters can be changed. The main goal of this study is to evaluate the vibration transmissibility of PE and XPE cushioning material at varied storage (preloaded) time and static load conditions. Four different kinds of duration (1 hour, 10 hours, 100 hours and 1000 hours) were used for the pre-loading period at three different static loads (3.488 kPa, 4.651 kPa, and 6.976 kPa), and then at 0.5 oct/min sine sweep vibration the peak frequencies of response and vibration transmissibility, and damping ratio were determined. The results show that the effect of pre-loading is minimal by PE material, but can influence the resonance frequencies by XPE cushioning material. The findings of this study help the packaging engineers to understand better the mechanism of these cushioning materials and to design suitable protective packaging systems.

Open Access: Yes

DOI: 10.5937/FME2104962C

Potentials of blockchain technologies for supply chain collaboration: a conceptual framework

Horst Treiblmaier Thomas Stafford John G. Keogh Abderahman Rejeb Steve Simske

Publication Name: International Journal of Logistics Management

Publication Date: 2021-01-01

Volume: 32

Issue: 3

Page Range: 973-994

Description:

Purpose: The purpose of this study is to investigate the potentials of blockchain technologies (BC) for supply chain collaboration (SCC). Design/methodology/approach: Building on a narrative literature review and analysis of seminal SCC research, BC characteristics are integrated into a conceptual framework consisting of seven key dimensions: information sharing, resource sharing, decision synchronization, goal congruence, incentive alignment, collaborative communication and joint knowledge creation. The relevance of each category is briefly assessed. Findings: BC technologies can impact collaboration between transaction partners in modern supply chains (SCs) by streamlining information sharing processes, by supporting decision and reward models and by strengthening communicative relationships with SC partners. BC promises important future capabilities in SCs by facilitating auditability, improving accountability, enhancing data and information transparency and improving trust in B2B relationships. The technology also promises to strengthen collaboration and to overcome vulnerabilities related to moral hazard and shortcomings found in legacy technologies. Research limitations/implications: The paper is mainly focused on the potentials of BC technologies on SCC as envisioned in the current academic literature. Hence, there is a need to validate the theoretical inferences with other approaches such as expert interviews and empirical tests. This study is of use to practitioners and decision-makers seeking to engage in BC-collaborative SC models. Originality/value: The value of this paper lies in its call for an increased focus on the possibilities of BC technologies to support SCC. This study also contributes to the literature by filling the knowledge gap of how BC potentially impacts SC management.

Open Access: Yes

DOI: 10.1108/IJLM-02-2020-0098

The two distinct systems of socialist Albania and SFR Yugoslavia: A comparative analysis using Kornai's 'Main Line of Causality'

Eszter Kazinczy

Publication Name: History of Economic Thought and Policy

Publication Date: 2021-01-01

Volume: Unknown

Issue: 2

Page Range: 31-51

Description:

This paper compares two peculiar country cases within the former European socialist bloc: Albania and the Socialist Federal Republic of Yugoslavia. Based on János Kornai's 'main line of causality', we compare the two countries' main characteristics from the end of the Second World War until the fall of their socialist regimes. The goal of the paper is to demonstrate that the two neighbouring countries had similar political and economic intentions following the Second World War; yet despite this fact the analysed countries' development paths gradually diverged. As a result, the two systems differed fundamentally by the 1970s. Analysing the timeperiod in question is crucial to understand Albania's and the successor Yugoslav states' subsequent economic development.

Open Access: Yes

DOI: 10.3280/SPE2021-002002