Open Access Method Article

Intensifying Cross-border Logistics Collaboration Opportunities Using a Virtual Logistics Center

Peter Tamas, Bela Illes, Tamas Banyai, Agota Banyaine Toth, Umetaliev Akylbek, Robert Skapinyecz

Journal of Engineering Research and Reports, Page 1-7
DOI: 10.9734/jerr/2020/v13i317100

There are a number of untapped opportunities for cross-border logistics cooperation, one of which is the operation of virtual logistics centers. The Institute of Logistics of the University of Miskolc researched the possibilities of establishing and operating Virtual Logistics Centers in many fields (e.g. automotive industry, maintenance systems, etc.). The paper describes a proposed concept for the operation of virtual logistics centers for cross-border cooperation, as well as explores the possible benefits of the application. The proposed concept can provide a good basis for the development of a virtual logistics center in the border regions of Miskolc (Hungary) - Košice (Slovakia), and also in the border regions of Bishkek (Kyrgyzstan) -Almaty (Kazakhstan).

Open Access Short Research Article

Mitigating Wafer Edge Cut Defect through Tensionless Tape Lamination Technique

Bryan Christian S. Bacquian, Frederick Ray I. Gomez

Journal of Engineering Research and Reports, Page 41-44
DOI: 10.9734/jerr/2020/v13i317103

Thinner and smaller packages require thinner vertical structure of the integrated circuit (IC) design with the wafer playing essential role in package thinning. As the wafer goes thinner, problems may occur in the pre-assembly or wafer preparation. With the introduction of new pre-assembly technology such as laser die attach film (DAF) cut and dicing before grinding, technical challenges were expected. The paper focused on eliminating the edge cutting issue by considering the appropriate taping lamination technique. Tensionless lamination helped eliminate the horizontal pressure applied into the tape thus mitigating the edge cutting problem.  For future works, the configuration shared in this paper could be applied on wafers with comparable technology.

Open Access Original Research Article

Numerical and Experimental Investigation on Performance of Convex-Cut Baffles in Shell-and-Tube Heat Exchanger

Moses Omolayo Petinrin, Ademola Adebukola Dare

Journal of Engineering Research and Reports, Page 8-26
DOI: 10.9734/jerr/2020/v13i317101

In this study, comparative performance of single-segmental baffle and a newly developed baffle – convex-cut in shell-and-tube heat exchanger were both numerically and experimentally investigated. For the numerical analysis, three working fluids (engine oil, water and air) were successively utilised on the shell-side of heat exchangers with 30, 35, 40 and 45% convex-cut (CeC_STHE) and 25% segmental (SS_STHE) baffles, and the resulting models were solved in COMSOL Multiphysics. Experiments were carried out on 30% CeC_STHE and SS_STHE exclusively running on water. The data obtained were used to determine the weighted shell-side heat transfer coefficient and weighted performance factor of each heat exchanger. Hence, the results for all the ranges of Reynolds number indicate that the shell-side heat transfer coefficients of all the CeC_STHEs are lower than that of SS_STHE except for the 30% CeC_STHE. However, the SS_STHE showed greater pressure drop than the CeC_STHEs. The choice of working fluid had more influenced on the weighted shell-side heat transfer coefficient CeC_STHE. Moreover, the weighted performance factors of the CeC_STHEs indicated positive values. Thus, 30% CeC_STHE demonstrated a better performance while the 45% had the lowest performance.

Open Access Original Research Article

CFD Analysis of Smoke and Temperature Control System of Car Park Area with Jet Fans

M. T. Çakir, Ç. Ün

Journal of Engineering Research and Reports, Page 27-40
DOI: 10.9734/jerr/2020/v13i317102

Basements of hospitals are generally used as indoor parking area.  When underground car parks are examined physically, it is not possible to ventilate them by natural roads. Therefore, in order to keep the density of harmful gases below certain limits; ventilation systems must be used. In this study, for a parking lot with a closed area of 19438.59 m²; jet fan system is designed and the performance of the system is simulated with Computational Fluid Dynamics (CFD). The covered parking area examined is located in Isparta; It is located on the 2nd basement of Isparta City Hospital.  The parking area is divided into 5 zones and CFD smoke analysis is made for the jet fan ventilation system designed for the parking area. The purpose of this study in Isparta City Hospital (basement-2) to examine the ventilation system is designed for parking areas using CFD.  The CFD analysis made allowed us to see the correct placement of the jet fans and to decide the best placement. In case of a fire, various scenarios were prepared in accordance with international standards and the best results were obtained.

Open Access Original Research Article

Reliability Evaluation of Multi-State Flow Networks Via Map Methods

Ali Muhammad Ali Rushdi, Omar Mutab Alsalami

Journal of Engineering Research and Reports, Page 45-59
DOI: 10.9734/jerr/2020/v13i317104

This paper examines two simple (albeit useful) methods used to evaluate the reliability of two-terminal multistate flow networks. These two methods involve two Karnaugh map versions, namely the Variable-Entered Karnaugh Map (VEKM) and the Multi-Valued Karnaugh Map (MVKM). These two versions are crucial in providing not only the visual insight necessary to write better future software but also adequate means of verifying such software. We assess these two versions of map methods versus the exhaustive search method, which guarantees conceptual clarity at the expense of lack of computational efficiency. Our target is the evaluation of the probability mass function (pmf) in a wide array of cases, in which we consider flow from a source node to a sink node in a capacitated network with a multistate capacity model for the links. Each network link has a varying capacity, which is assumed to exist in a mutually exclusive sense. The reliability of the system is wholly dependent on its ability to successfully transmit at least a certain required system flow from the source (transmitter) to the sink (receiver) station. The max-flow min-cut theorem is critical in obtaining all successful states. To demonstrate the proposed methods applicability, two demonstrative examples are given with ample details.

Open Access Review Article

Development Possibilities of the High-tech Logistics Laboratory Established at the Institute of Logistics of the University of Miskolc

Péter Tamás, Tamás Bányai, Béla Illés, Sándor Tollár, Péter Veres, Ákos Cservenák, Ibolya Hardai, Róbert Skapinyecz

Journal of Engineering Research and Reports, Page 60-68
DOI: 10.9734/jerr/2020/v13i317127

The Institute of Logistics of the University of Miskolc started training logistics in Hungarian higher education for the first time in the early 1990s. In recent decades, the training structure and laboratory infrastructure of the institute have changed significantly, relying on the relevant educational and research connections in Germany. The publication presents one of the institute's laboratories, the High-tech Integrated Logistics Laboratory, which contains a number of material handling equipment (pallet handling cell, AGV, automated warehousing system, etc.), which provides an opportunity for fulfillment of high-quality teaching and research tasks. In addition to a brief presentation of the laboratory, the researchers present their future ideas about the laboratory in different areas of development, which can also serve as a useful guide for other professionals involved in logistics education and research.