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A Hybrid Discrete Memetic Algorithm for Solving Flow-Shop Scheduling Problems

Olivér Hornyák Károly Nehéz Boldizsár Tüu-Szabó Levente Fazekas Laszlo T. Koczy

Publication Name: Algorithms

Publication Date: 2023-09-01

Volume: 16

Issue: 9

Page Range: Unknown

Description:

Flow-shop scheduling problems are classic examples of multi-resource and multi-operation scheduling problems where the objective is to minimize the makespan. Because of the high complexity and intractability of the problem, apart from some exceptional cases, there are no explicit algorithms for finding the optimal permutation in multi-machine environments. Therefore, different heuristic approaches, including evolutionary and memetic algorithms, are used to obtain the solution—or at least, a close enough approximation of the optimum. This paper proposes a novel approach: a novel combination of two rather efficient such heuristics, the discrete bacterial memetic evolutionary algorithm (DBMEA) proposed earlier by our group, and a conveniently modified heuristics, the Monte Carlo tree method. By their nested combination a new algorithm was obtained: the hybrid discrete bacterial memetic evolutionary algorithm (HDBMEA), which was extensively tested on the Taillard benchmark data set. Our results have been compared against all important other approaches published in the literature, and we found that this novel compound method produces good results overall and, in some cases, even better approximations of the optimum than any of the so far proposed solutions.

Open Access: Yes

DOI: 10.3390/a16090406

CLUSTERING ANALYSIS OF PATCHOULI PLANTATIONS FOR SUSTAINABLE PATCHOULI OIL SUPPLY CHAIN USING K-MEANS ALGORITHM

Friesca Erwan Prima Denny Sentia Hazful Maizi Geta Ambartiasari

Publication Name: Journal of Applied Engineering and Technological Science

Publication Date: 2025-12-29

Volume: 7

Issue: 1

Page Range: 337-355

Description:

Growing demand for patchouli oil has undoubtedly become an opportunity for the patchouli industry, particularly in Aceh, which supplies about 80% of Indonesia’s patchouli oil in the global supply chain system. However, the opportunity is often misguided by farmers and even the government, which implements various programs related to patchouli cultivation without identifying the potential land that is suitable to be used for it. The condition indicated that not every land is suitable for patchouli cultivation. Thus, it is necessary to cluster the distribution of existing patchouli plantations. The clustering aims to identify the existing patchouli plantations that have the potential for replication. This study uses the K-Means method that combines variables (the planting land, the harvesting land, and total production) to provide information on the plantation’s potential scale in each region. The clustering measurement pointed out that the plantation in South Aceh Regency has the most potential land for sustainable cultivation, followed by several other areas included in Cluster 2 and Cluster 3. The study’s result is essential in contributing significantly to optimizing patchouli cultivation management sustainability to fulfill Aceh Province’s role as the best quality patchouli oil supplier.

Open Access: Yes

DOI: 10.37385/jaets.v7i1.7188

Bananas, coffee and palm oil: The trade of agricultural commodities in the framework of the EU-Colombia free trade agreement

Laszlo Vasa Béla Soltész Julieth P.T. Cubillos

Publication Name: Plos One

Publication Date: 2021-08-01

Volume: 16

Issue: 8 August

Page Range: Unknown

Description:

Generally, research and studies about commodities focus on price trends, analysis in terms of international competitiveness, market position structure, rate of net exports, market share, and concentration index. This paper has developed an analysis of the most influential agricultural commodities traded from Colombia to European Union, which are bananas, coffee, and palm oil. Analyzing the economic and commercial effects in two traditional agricultural commodities from Colombia (bananas and coffee) with the rise of palm oil as a commodity in the trade relation with its partner; the European Union. The structure draws from the overview of general aspects and the behavior of Colombian foreign trade, as diversification of export products and trade partners, to focus on the characteristics of the trade relationship between the European Union and Colombia. The aim is analyze the proportional relation between bananas, coffee, and palm oil exported to the EU, according to three indicators, the volume of production, exports share, and trade value, from 2008 until 2019, identifying the trends before and after the implementation of the free trade agreement. Finally, with the coefficient correlation, determine the agricultural commodity that has the strongest and positive relationship with the total agricultural exports value from Colombia to the European Union.

Open Access: Yes

DOI: 10.1371/journal.pone.0256242

INTUITIVE DECISION: WHEN TO BEGIN THE SUCCESSION PROCESS

Katalin Darabos

Publication Name: Corvinus Journal of Sociology and Social Policy

Publication Date: 2022-01-01

Volume: 13

Issue: 2

Page Range: 79-105

Description:

The aim of the paper is to increase understanding of the succession decision-making process in family businesses. In understanding this phenomenon on the personal level of reality and understanding the decision-making process involved in succession, the decision-maker’s thought process and aspirations have to be taken into consideration. Based on a survey, a knowledge-based expert system tool (Doctus) was used to order successors’ intuitive knowledge and aspirations in order to deepen our understanding of the succession decision-making phenomenon. The diversity of the identified rules suggests that first generational change does not happen according to a single model but rather a variety of pathways are followed, depending on the context.

Open Access: Yes

DOI: 10.14267/CJSSP.2022.2.4

Effects of soil compaction on cereal yield: A review

G. Milics A. J. Kovács A. Nyéki M. Neményi

Publication Name: Cereal Research Communications

Publication Date: 2017-03-01

Volume: 45

Issue: 1

Page Range: 1-22

Description:

This paper reviews the works related to the effect of soil compaction on cereal yield and focuses on research of field experiments. The reasons for compaction formation are usually a combination of several types of interactions. Therefore one of the most researched topics all over the world is the changes in the soil's physical and chemical properties to achieve sustainable cereal production conditions. Whether we are talking about soil bulk density, physical soil properties, water conductivity or electrical conductivity, or based on the results of measurements of on-line or point of soil sampling resistance testing, the fact is more and more information is at our disposal to find answers to the challenges. Thanks to precision plant production technologies (PA) these challenges can be overcome in a much more efficient way than earlier as instruments are available (geospatial technologies such as GIS, remote sensing, GPS with integrated sensors and steering systems; plant physiological models, such Decision Support System for Agrotechnology Transfer (DSSAT), which includes models for cereals etc.). The tests were carried out first of all on alteration clay and sand content in loam, sandy loam and silt loam soils. In the study we examined especially the change in natural soil compaction conditions and its effect on cereal yields. Both the literature and our own investigations have shown that the soil moisture content changes have the opposite effect in natural compaction in clay and sand content related to cereal yield. These skills would contribute to the spreading of environmental, sustainable fertilizing devoid of nitrate leaching planning and cereal yield prediction within the framework of the PA to eliminate seasonal effects.

Open Access: Yes

DOI: 10.1556/0806.44.2016.056

Anti-Zionism of the Communist Party in Hungary During the Rákosi Era (1948-1953)

Róbert Győri Szabó

Publication Name: East European Jewish Affairs

Publication Date: 2026-01-01

Volume: 54

Issue: 1

Page Range: 114-133

Description:

During the years of Stalinism in Hungary, the communist regime had a complex and ambivalent attitude towards people of Jewish origin and Jewish identity. Whereas it had previously tolerated the increasingly popular Zionism during the post-war coalition years, after the regime change in the context of the establishment of the Jewish state and subsequent changes in Soviet policy, this tolerance almost immediately ended. It began to persecute Zionist organizations and Zionists alike, Zionist institutions were liquidated, and criminal proceedings were initiated against their leaders. To explore and present the subject, this study draws on archival sources of the period and the Hungarian secondary literature.

Open Access: Yes

DOI: 10.1080/13501674.2025.2596635

The spatial dimension of liturgy: Historical and contemporary accounts of communio-space in Europe's Latin rite liturgical architecture

Vilmos Katona

Publication Name: Epites Epiteszettudomany

Publication Date: 2017-03-01

Volume: 45

Issue: 1-2

Page Range: 173-213

Description:

The present study focuses on the spatial aspect of the liturgy, the raison d'être of church building. The topicality of this approach is explained either by the manner of international communication about sacred architecture, or by the work of German architect Rudolf Schwarz (1897-1961), who is cited anew, very often due to his unification of architectural praxis, scientific activity and a life of a devoted man deservedly still influential in the field. A church can be understood by its operative function. Throughout the most important liturgical reform movements of the 20th century, one can get an insight into the spatial concepts of the designers, which, consciously or not, reflect the achievements of these movements even today. In the contemporary praxis of Latin Rite liturgy, the divorce between the once close-knit aspects of the worship are palpable, thanks to these reforms on the one hand, and their late interpretations on the other. Inspired by autonomous readings, the sacrificial act of the Eucharist (sacrificium) and the symbol of the communal feast (cena) were associated with correspondent models of space. This problem shares root with the frequent contraposition of personal devotion and the communio: the former prevails in oriented spaces, while the latter appears in the central. Spatial concepts capable of respecting both religious devotion and the needs of the community in their primordial unity and theological profoundness, seldom can be found today. Following the terminology of Albert Gerhards and Walter Zahner, these are often referred to as communio-spaces (Communio-Räume). Albeit the proposition of this space type is clearly theoretical, it looks back to important antecedents from the 20th century, and defines a multiplicity of new directions. The story of communio-space spans from Rudolf Schwarz to the contemporary church architecture of Central and Western Europe as well as North America, and still influences the newest designs of liturgical spaces. In Hungary, this recent issue of spatial arrangement is not a question of a substantial debate up to now, yet even this limited number of experiments necessitate the idea and applied examples of communio-space to acquire more attention here as well.

Open Access: Yes

DOI: 10.1556/096.2017.45.1-2.9

Replacing Traditional Transmission Models with Artificial Intelligence †

Cs Tóth-Nagy Tamás Koller

Publication Name: Engineering Proceedings

Publication Date: 2025-01-01

Volume: 113

Issue: 1

Page Range: Unknown

Description:

The development of vehicle simulation models is becoming increasingly important, especially for the virtual validation of new automotive features. New methods are emerging that need to be tested and validated to ensure their proper functioning. The use of artificial intelligence methods can accelerate product development processes, so it is essential for companies to examine the applicability of these solutions. This article compares the results of a traditional rule-based transmission model and an artificial intelligence-based transmission model against real vehicle measurements. Creating a transmission model using the new artificial intelligence-based method requires less time and effort than developing a rule-based model. However, experimental data is required to train the model. This paper addresses the challenges of artificial intelligence-based transmission modeling and highlights the new advantages of artificial intelligence-based solutions.

Open Access: Yes

DOI: 10.3390/engproc2025113061

Elements of Divergence in Urbanization between Central and Eastern Europe (CEE) and the Core of the Continent

Dávid Fekete Krisztina Gálos Péter Faragó

Publication Name: Sustainability Switzerland

Publication Date: 2022-10-01

Volume: 14

Issue: 19

Page Range: Unknown

Description:

There is an ongoing debate regarding whether the EU-10 converges at the core of Europe or not. Although the evidence supports both perspectives, the gap in urbanization is undeniable. In this explorative study, two economic processes contributing to this disparity—foreign direct investment and migration—were analyzed and contextualized with respect to urbanization using grounded theory. It was concluded that there is slight convergence in the frontier, usually in urbanized areas of Central and Eastern Europe (CEE), but not in the rural areas; additionally, the rural–urban dichotomy within the CEE countries is deepening due to the self-enhancing nature of the analyzed processes.

Open Access: Yes

DOI: 10.3390/su141912377