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Found 6327 publications

New species and records of Oripodoidea (Acari, Oribatida) from Mexico

Sergey G. Ermilov Jenő Kontschán

Publication Name: Systematic and Applied Acarology

Publication Date: 2023-06-28

Volume: 28

Issue: 6

Page Range: 1109-1120

Description:

Twelve species, 10 genera and five families of Oripodoidea (Oribatida) are registered from leaf litter in secondary semi-evergreen forest in Quintana Roo, Mexico; of them, five species (Nasobates spinosus, Mucrobates fissuratus, Scheloribates milleri, S. (Perscheloribates) minusculus, Protoribates paracapucinus) are recorded for the first time in this country; two species (Muliercula bilineata, Peloribates (Peloribatodes) roynortoni) are found for the first time in the Neotropical region. Two new species - Scheloribates (Perscheloribates) mexicoensissp. nov. (Scheloribatidae) and Setoxylobates palaciosvargasisp. nov. (Haplozetidae) - are described. An identification key to the known species of Scheloribates (Perscheloribates) from the Neotropical region is provided.

Open Access: Yes

DOI: 10.11158/saa.28.6.8

A települési és mezogazdasági vízgazdálkodás azbeszt okozta kockázati tényezoi a krizotil-azbeszt vonatkozásában

András Torma Gergely Zoltán Macher Dóra Beke

Publication Name: Agrokemia Es Talajtan

Publication Date: 2023-06-21

Volume: 72

Issue: 1

Page Range: 44-63

Description:

No description provided

Open Access: Yes

DOI: 10.1556/0088.2023.00147

The impact of historical traditions on the regulation and practice of the preferential naturalization of Hungarians living outside the borders

Mónika Ganczer

Publication Name: Hungarian Journal of Legal Studies

Publication Date: 2023-06-19

Volume: 63

Issue: 4

Page Range: 352-373

Description:

The study presents the impact of the historical origin of the making and application of law through a specific example. The regulation of nationality, a pivotal field of constitutional law, is considered a sovereign right of the Hungarian state which is exercised in line with Article G) of the Fundamental Law and Act No. LV of 1993 on Hungarian Citizenship. Hungarian naturalization practice, however, significantly changed in the wake of the amendment of the respective act: Hungarians living outside the borders have been entitled to preferential naturalization since 2011. This study aims to prove that this legislative action, which remarkably followed the designation of the day of the conclusion of the Trianon Peace Treaty as the Day of National Unity the previous year, was obviously influenced by historical considerations. The primary objective of preferential naturalization was to grant Hungarian nationality to persons of Hungarian origin whose ancestors had lost their Hungarian nationality in the aftermath of historical events involving the transfer of territories to neighbouring states. The study's point of departure is the Trianon Peace Treaty, the first major instrument to have a profound effect on the nationality of millions of Hungarians. The study explores the peculiar interpretation and application of treaty provisions relating to territorial changes and reveals the flaws in legal regulation which further contributed to the formation of a large community of Hungarians living outside the borders. Having surveyed the historical background, the analysis proceeds to examine the impact of historical traditions on the underlying motives and current domestic regulation of preferential naturalization. Evidence includes the broad scope of eligible persons, the wide range of documents accepted to prove descent, the verification of the required command of language, and the practical implementation of the procedure of naturalization. Research findings convincingly display the far-reaching effects of historical traditions on the regulation and practice of preferential naturalization in Hungary.

Open Access: Yes

DOI: 10.1556/2052.2023.00412

An Investigation of the Recent Developments in Reliability-based Structural Topology Optimization

Majid Movahedi Rad Muayad Habashneh

Publication Name: Periodica Polytechnica Civil Engineering

Publication Date: 2023-06-16

Volume: 67

Issue: 3

Page Range: 765-774

Description:

Optimizing a structure's topology involves finding the best possible distribution of material and connections within a given design space. It has a significant effect on its performance, which is why there has been a meteoric rise in the number of articles published on the topic over the last two decades. This work offers an investigation of reliability-based topology optimization of structures, in light of the recent development of several topology optimization techniques for both linear and nonlinear systems. Therefore, the emphasis of this study is on the latest advancements, enhancements, and applications of reliability-based topology optimization. This paper's primary objective is to provide an overview of the latest advancements in the reliability-based topology optimization of structures, with a particular emphasis on the recent improvement of integrating reliability-based design into the bi-directional evolutionary structural optimization (BESO) method, which accounts for the topological optimization of geometric and material nonlinearity as well as thermoelastic problems.

Open Access: Yes

DOI: 10.3311/PPci.22107

Polyaromatic hydrocarbons (PAHs) in the water environment: A review on toxicity, microbial biodegradation, systematic biological advancements, and environmental fate

Mahmoud Nasr Balasubramani Ravindran Abiraami Ramakrishnan Praveen Kumar Issac Kuan Shiong Khoo Nur Izyan Wan Azelee Babett Greff Rajinikanth Rajagopal Byong Hun Jeon Madhumitha Vijayanand Ramakrishnan Subramanian Soon Woong Chang

Publication Name: Environmental Research

Publication Date: 2023-06-15

Volume: 227

Issue: Unknown

Page Range: Unknown

Description:

Polycyclic aromatic hydrocarbons (PAHs) are considered a major class of organic contaminants or pollutants, which are poisonous, mutagenic, genotoxic, and/or carcinogenic. Due to their ubiquitous occurrence and recalcitrance, PAHs-related pollution possesses significant public health and environmental concerns. Increasing the understanding of PAHs' negative impacts on ecosystems and human health has encouraged more researchers to focus on eliminating these pollutants from the environment. Nutrients available in the aqueous phase, the amount and type of microbes in the culture, and the PAHs' nature and molecular characteristics are the common factors influencing the microbial breakdown of PAHs. In recent decades, microbial community analyses, biochemical pathways, enzyme systems, gene organization, and genetic regulation related to PAH degradation have been intensively researched. Although xenobiotic-degrading microbes have a lot of potential for restoring the damaged ecosystems in a cost-effective and efficient manner, their role and strength to eliminate the refractory PAH compounds using innovative technologies are still to be explored. Recent analytical biochemistry and genetically engineered technologies have aided in improving the effectiveness of PAHs' breakdown by microorganisms, creating and developing advanced bioremediation techniques. Optimizing the key characteristics like the adsorption, bioavailability, and mass transfer of PAH boosts the microorganisms' bioremediation performance, especially in the natural aquatic water bodies. This review's primary goal is to provide an understanding of recent information about how PAHs are degraded and/or transformed in the aquatic environment by halophilic archaea, bacteria, algae, and fungi. Furthermore, the removal mechanisms of PAH in the marine/aquatic environment are discussed in terms of the recent systemic advancements in microbial degradation methodologies. The review outputs would assist in facilitating the development of new insights into PAH bioremediation.

Open Access: Yes

DOI: 10.1016/j.envres.2023.115716

Recent aspects of pharmaceutical and endoscopic treatment of acute gastroduodenal ulcer bleeding

Istvan Racz

Publication Name: Orvosi Hetilap

Publication Date: 2023-06-11

Volume: 164

Issue: 23

Page Range: 883-890

Description:

Acute gastroduodenal ulcer bleeding is a life-Threatening condition. Management of the acute gastroduodenal ulcer bleeding requires the cooperation of different specialists. The complex management program includes the immediate control of the hemodynamic status, transfusion and gastric acid inhibition therapy, endoscopic diagnosis, treatment and occasionally the invasive radiological interventions and surgery. According to the recent guidelines, pre-endoscopic parenteral proton-pump inhibitor therapy is recommended only for consideration. Urgent endoscopy (≥12 hours after admission) has no advantage to the early endoscopic (≥24 hours after admission) strategy. For ulcers with high rebleeding risk due to more than 2 cm in diameter, fibrotic base or wide visible vessel, the use of the "over-The-scope clip"is advisable even as a first-line endoscopic hemostatic therapy. Intermittent high-dose parenteral proton-pump inhibitor therapy is a new therapeutical option after endoscopic hemostasis. In patients with acute gastroduodenal bleeding who are taking low dose aspirin for secondary cardiovascular prophylaxis, aspirin should not be interrupted, while low dose aspirin administered for primary prophylaxis may be stopped.

Open Access: Yes

DOI: 10.1556/650.2023.32808

Customer sentiment analysis and prediction of halal restaurants using machine learning approaches

Mst Farjana Rahman Md Shamim Hossain Md Kutub Uddin Kamal Hossain

Publication Name: Journal of Islamic Marketing

Publication Date: 2023-06-07

Volume: 14

Issue: 7

Page Range: 1859-1889

Description:

Purpose: There is a strong prerequisite for organizations to analyze customer review behavior to evaluate the competitive business environment. The purpose of this study is to analyze and predict customer reviews of halal restaurants using machine learning (ML) approaches. Design/methodology/approach: The authors collected customer review data from the Yelp website. The authors filtered the reviews of only halal restaurants from the original data set. Following cleaning, the filtered review texts were classified as positive, neutral or negative sentiments, and those sentiments were scored using the AFINN and VADER sentiment algorithms. Also, the current study applies four machine learning methods to classify each review toward halal restaurants into its sentiment class. Findings: The experiment showed that most of the customer reviews toward halal restaurants were positive. The authors also discovered that all of the methods (decision tree, linear support vector machine, logistic regression and random forest classifier) can correctly classify the review text into sentiment class, but logistic regression outperforms the others in terms of accuracy. Practical implications: The results facilitate halal restaurateurs in identifying customer review behavior. Social implications: Sentiment and emotions, according to appraisal theory, form the basis for all interactions, facilitating cognitive functions and supporting prospective customers in making sense of experiences. Emotion theory also describes human affective states that determine motives and actions. The study looks at how potential customers might react to a halal restaurant’s consensus on social media based on reviewers’ opinions of halal restaurants because emotions can be conveyed through reviews. Originality/value: This study applies machine learning approaches to analyze and predict customer sentiment based on the review texts toward halal restaurants.

Open Access: Yes

DOI: 10.1108/JIMA-04-2021-0125

The reaction of the metal and gold resource planning in the post-COVID-19 era and Russia-Ukrainian conflict: Role of fossil fuel markets for portfolio hedging strategies

Rabeh Khalfaoui Gagan Deep Sharma Kamel Si Mohammed Buhari Doğan Urszula Mentel

Publication Name: Resources Policy

Publication Date: 2023-06-01

Volume: 83

Issue: Unknown

Page Range: Unknown

Description:

The prime objective of this article is to examine the policy-making role of metal markets, gold resources, and clean energy markets in the post-COVID-19 era and the Russia-Ukrainian military conflict. In doing so, we analyze the role of fossil fuels, clean energy, and metals markets, considering the military conflict in Ukraine in 2022. The study employs event study methodology (ESM), Total connectedness index (TCI), and network analyses. The results indicate that natural gas and clean energy prices are less affected by conflict in the aftermath of an invasion than traditional energy and metals markets. In addition, we observe an increase in the TCI in the energy markets during announcement days. The TCI of the metals market is greater than that of the energy market. According to network connectivity, the key asset class transmitters of the shock in Europe are the Geopolitical index (GPR), gold, and the clean energy stock index (ERIX). The U.S. markets are less affected by the situation in Ukraine. The average hedge suggests that the optimal hedge differs from one market to the next, with fossil fuels and renewable energy, respectively, being more hedge effective and reducing risk by an average of around 0.80 and 0.59, given their ability to function as a hedging instrument.

Open Access: Yes

DOI: 10.1016/j.resourpol.2023.103654

Determining the Deformation Characteristics of Railway Ballast by Mathematical Modeling of Elastic Wave Propagation

Szabolcs Fischer Balazs Horvath Mykola Kurhan Dmytro Kurhan

Publication Name: Applied Mechanics

Publication Date: 2023-06-01

Volume: 4

Issue: 2

Page Range: 803-815

Description:

The article solves the problem of theoretically determining the deformable characteristics of railway ballast, considering its condition through mathematical modeling. Different tasks require mathematical models with different levels of detail of certain elements. After a certain limit, excessive detailing only worsens the quality of the model. Therefore, for many problems of the interaction between the track and the rolling stock, it is sufficient to describe the ballast as a homogeneous isotropic layer with a vertical elastic deformation. The elastic deformation of the ballast is formed by the deviation of individual elements; the ballast may have pollutants, the ballast may have places with different levels of compaction, etc. To be able to determine the general characteristics of the layer, a dynamic model of the stress–strain state of the system based on the dynamic problem of the theory of elasticity is applied. The reaction of the ballast to the dynamic load is modeled through the passage of elastic deformation waves. The given results can be applied in the models of the railway track in the other direction as initial data regarding the ballast layer.

Open Access: Yes

DOI: 10.3390/applmech4020041