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Found 6412 publications

FEEL++ applications to engineering problems

Lotfi Abdelhakim

Publication Name: Aip Conference Proceedings

Publication Date: 2018-07-10

Volume: 1978

Issue: Unknown

Page Range: Unknown

Description:

Feel++ is a unified C++ implementation of Galerkin methods (finite and spectral element methods) in 1D, 2D and 3D to solve partial differential equations and provide a set of complementary modeling tools that can be applied to a large range of monophysics or multiphysics applications in fluid mechanics, solid mechanics, heat transfer, blood rheology, eye modeling and simulation and electro-magnetism. The software follows closely the mathematical abstractions associated with partial differential equations (PDE) and in particular the finite element mathematical framework and variational formulations. The Feel++ library offers solving strategies that scales up to thousands and even tens of thousands of cores and allows the developers to create C++ complex and typically non-linear multi-physics applications currently in industry, physics and health-care with powerful tools such as BOOST, PETSC or SLEPC which enable a huge backend for huge memory needs or enormous mathematical calculations.

Open Access: Yes

DOI: 10.1063/1.5044138

Desktop VR and the Use of Supplementary Visual Information

Borbála Berki

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 333-336

Description:

A 3D desktop virtual reality could provide an overview of program windows; thus users can see supplementary information. The aim of this study was to compare the use of this extra information in desktop VR and in a classic 2D browser. To test this, a between-subject design was realized with 53 participants (VR group: 26; browser group: 27). The MaxWhere VR environment was used as desktop VR and the Google Chrome as browser. The participants had to complete a task, while they could see their performance visually. At the final questionnaire, they had to estimate their performance and indicate their basis for this estimation. There was a significant difference in the estimation accuracy between the two groups, for those who indicated the supplementary visual information as their main source of estimation. Those who completed the task in desktop VR could estimate their performance more accurately, so they remembered better the supplementary visual information.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639925

Generation management tendencies in virtual education

Adel Vehrer Attila Pongracz

Publication Name: 9th IEEE International Conference on Cognitive Infocommunications Coginfocom 2018 Proceedings

Publication Date: 2018-07-02

Volume: Unknown

Issue: Unknown

Page Range: 399-404

Description:

The authors of the present essay have been teaching at the department of Human Resoursces Counselling, MA for a decade. They both consider demographic changes and discrepancy in the various generations' digital competence as the greatest professional challenge. In this study of theirs, the authors present the principles along which they wish to prepare students for such challenges. In the future authors will designate a key role to the application of co-operative techniques as well as to the usage of 3D/VR spaces within the education process.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2018.8639957

DETERMINANTS FOR POST-PANDEMIC RECOVERY OF MACROECONOMIC STABILITY: EVIDENCE FROM EUROPEAN COUNTRIES

Alina Vysochyna Wojciech Cieśliński Tetiana Vasylieva Domonkos Tinka

Publication Name: Economics and Sociology

Publication Date: 2024-01-01

Volume: 17

Issue: 2

Page Range: 256-272

Description:

The destructive consequences of the COVID-19 pandemic have negatively affected socioeconomic indicators and disrupted macroeconomic stability. The aim of the study is to determine the optimal combination of financial, socioeconomic, and public health determinants based on their relevance for the post-pandemic recovery of macroeconomic stability. For this purpose, principal component analysis was used to form an initial macroeconomic stability index by integrating such indicators as GDP growth, unemployment rate, consumer price index, current account balance, and trade volume. Next, the Granger test and panel data regression modeling was employed to identify the causality between the level of macroeconomic stability and a set of financial, socioeconomic and public health determinants. Finally, the financial, socioeconomic, and public health determinants were ranked according to their impact on macroeconomic stability. The obtained empirical results can be used to improve the financial, economic, and health care state policies in terms of strengthening country resistance to risks caused by a pandemic or other similar threats in the future.

Open Access: Yes

DOI: 10.14254/2071-789X.2024/17-2/13

Near-infrared spectroscopy for rapid evaluation of winter cereals and Italian ryegrass forage mixtures

Tamás Tóth George Bázár Róbert Tóthi Richárd Hoffmann Hedvig Febel László Kacsala Balázs Húth Haruna Gado Yakubu Alemayehu Worku Szilvia Orosz

Publication Name: Animal Science Journal

Publication Date: 2023-01-01

Volume: 94

Issue: 1

Page Range: Unknown

Description:

Near-infrared (NIR) spectroscopy was employed to determine the differences between forage mixtures of winter cereals and Italian ryegrass and to evaluate fermentation characteristics of mixed silages. Forages were harvested on five phases (Cuts 1–5), with 1 week interval (n = 100). The yield of the last harvest (Cut 5) was ensiled and analyzed on four different days (D0, D7, D14, and D90) (n = 80). Principal component analysis based on the NIR data revealed differences according to the days of harvest, differences between winter cereals and Italian ryegrass forages, and differences in the fermentation stages of silages. The partial least square regression models for crude protein (CP), crude fiber (CF), and ash gave excellent determination coefficient in cross-validation (R2CV > 0.9), while models for ether extract (EE) and total sugar content were weaker (R2CV = 0.87 and 0.74, respectively). The values of root mean square error of cross-validation were 0.59, 0.76, 0.22, 0.31, and 2.36 %DM, for CP, CF, EE, ash, and total sugar, respectively. NIR proved to be an efficient tool in evaluating type and growth differences of the winter cereals and Italian ryegrass forage mixtures and the quality changes that occur during ensiling.

Open Access: Yes

DOI: 10.1111/asj.13823

On classical and fuzzy Hough transform in colonoscopy image processing

Brigita Sziova Raneem Ismail Laszlo T. Koczy Szilvia Nagy

Publication Name: IEEE AFRICON Conference

Publication Date: 2021-09-13

Volume: 2021-September

Issue: Unknown

Page Range: Unknown

Description:

Hough transform is used to find lines on edge-filtered images that are given in parametric form. As the fuzzy extension of the Hough transform has been proven to be more robust in environments where the lines to be found by them are not strictly following the formula given by the parametric equation of the Hough transform due to noise and weak and blurred contours, in the following considerations, we study the applicability of the circular fuzzy Hough transform for analyzing colonoscopy pictures and detecting colorectal polyps.

Open Access: Yes

DOI: 10.1109/AFRICON51333.2021.9570897

Kulturális metaforák és sémák a magyar népdalok FOLYÓ-reprezentációiban

Judit Baranyiné Kóczy

Publication Name: Magyar Nyelv

Publication Date: 2018-01-01

Volume: 114

Issue: 2

Page Range: 156-168

Description:

No description provided

Open Access: Yes

DOI: 10.18349/MagyarNyelv.2018.2.156

Notes on the genus Elegansovella Hirschmann, 1989 (Acari, Mesostigmata, Urodinychidae)

Sergey G. Ermilov Jenő Kontschán Stefan Friedrich

Publication Name: Zookeys

Publication Date: 2024-01-01

Volume: 1205

Issue: Unknown

Page Range: 39-50

Description:

The genus Elegansovella Hirschmann, 1989 (Mesostigmata: Uropodina: Urodinychidae) is resurrected for species of the Uroobovella elegans-group. This genus differs from the other taxa of Uroobovella Berlese, 1903 sensu lato based on the shape of the idiosoma and the caudal and dorsal setae. Three species from the Uroobovella elegans-group are transferred to the genus Elegansovella, as E. pectintata (Hirschmann, 1973), comb. nov., E. pectinatasimilis (Hiramatsu, 1980), comb. nov. and E. serangensis (Hiramatsu, 1980), comb. nov. The other seven species from this species group are transferred to Monstrobovella gen. nov., as M. crustosa (Vitzthum, 1926), comb. nov., M. enodis (Hiramatsu, 1985), comb. nov., M. faceta (Hiramatsu & Hirschmann, 1978), comb. nov., M. facetaoides (Hiramatsu & Hirschmann, 1978), comb. nov., M. imadatei (Hiramatsu, 1980), comb. nov., M. incerta (Hiramatsu & Hirschmann, 1978), comb. nov. and M. incertaoides (Hiramatsu & Hirschmann, 1978), comb. nov. The new genus differs from Elegansovella by the shape of the idiosoma and the shape of marginal and dorsal setae. Six Monstrobovella species occur in the Oriental Realm and only one species is known from the Neotropical region. The present paper contains the description of a second Neotropical species of Monstrobovella (M. mancocapaci sp. nov.) which was found in Peru. The new species differs from its Neotropical congener in the dorsal and marginal setation.

Open Access: Yes

DOI: 10.3897/zookeys.1205.125164

An update on the occurrence of flies (Diptera: Muscidae, Calliphoridae) and sucking lice (Phthiraptera: Anoplura) of veterinary importance in Malta: First record of Lucilia cuprina and Linognathus africanus

Jenő Kontschán Attila D. Sándor Gergő Keve Andrea M. Cini Bruno Nóra Takács Sándor Hornok

Publication Name: Frontiers in Veterinary Science

Publication Date: 2023-01-01

Volume: 10

Issue: Unknown

Page Range: Unknown

Description:

To obtain new data on the species diversity, host associations and spatiotemporal occurrence of flies and blood-sucking lice of veterinary importance in Malta, ectoparasites were collected at cattle, sheep and goat, pig farms, as well as dog shelters, and in two places in the absence of domestic animals. The species were identified morphologically, but voucher specimens were also analyzed with molecular-phylogenetic methods following DNA extraction. Altogether 3,095 flies (Diptera: Muscidae, Calliphoridae) were collected at farms and kennels near domestic animals, as well as 37 blowflies (Calliphoridae) in rural and urban areas without animals nearby. Regarding Muscidae, the great majority of flies (n = 3,084) were identified as the common housefly (Musca domestica). Eight flies represented the stable fly (Stomoxys calcitrans). Three blowflies associated with dogs and small ruminants belonged to Lucilia cuprina. By contrast, all 37 blowflies collected without domestic animals nearby, were identified as Lucilia sericata. In addition, 22 sucking lice were collected from goats, and all belonged to Linognathus africanus. Molecular identification of 28 flies and four lice confirmed the above species. Considering the sex ratio of M. domestica among samples collected randomly at cattle farms, females predominated in the whole study period, but the abundance of males increased significantly toward the autumn. Stomoxys calcitrans was associated with cattle and dogs, whereas L. cuprina was found near small ruminants and dogs. To our knowledge, this is the first study including the molecular analysis of flies and lice of veterinary-medical importance from Malta. The most important finding of this study is the first evidence for the autochthonous occurrence of L. cuprina in Malta. The exclusive presence of L. cuprina at animal-keeping facilities in rural areas and association of L. sericata with urban areas void of livestock might reflect similar habitat preference of these species in Malta to what was reported in South Africa. Based on the sucking-louse burden in the examined goat herds, the situation in Malta was similar to northern Africa where the exclusive presence of L. africanus was reported, unlike toward the north in the Mediterranean Basin where populations of this species are mixed with Linognathus stenopsis.

Open Access: Yes

DOI: 10.3389/fvets.2023.1143800