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A Study on the Realization Strategies of Virtual Classrooms with Overseas Universities
Lyudmila Atanasova,이하얀 호남대학교 인문사회과학연구소 2023 인문사회과학연구 Vol.66 No.3
This study examines the implementation of virtual classroom sessions with overseas universities in the Bulgarian major classes at the Department of Greek Studies and Bulgarian Studies at Hankuk University of Foreign Studies. The research aims to boost students' academic performance and interest, strengthen relationships between educational institutions, and encourage active interaction. The proposed partner for the virtual classroom is the Department of Korean Studies at Sofia University "St. Kliment Ohridski", Bulgaria. Korea and Bulgaria have established regional studies departments based on the principle of mutualism through agreements at the Ministry of Education level. This research aims to study how to activate the 'virtual classroom' in order to allow communication and learning from various perspectives through virtual exchange studies between the students from the two countries.
The Influence of European Modernism
Radostina Atanasova(라도스티나) 한국실내디자인학회 2017 한국실내디자인학회 학술대회논문집 Vol.2017 No.5
At first glance South Korea and Bulgaria are two completely different countries with their own history and culture. But once people “look close” apparently some similarities could be found. An example is the situation in the field of architecture and design. And more, how both countries stepped into the Modern Movement of 20<SUP>th</SUP> Century and what characteristics they took from the European Modernism.
Jolanda Bogdanova Vasileva,Teodora Atanasova Staykova,Panomir Ivanov Tzenov 한국잠사학회 2009 International Journal of Industrial Entomology Vol.18 No.2
The purpose of this study was to establish whether there are differences in the productivity of the same silkworm (Bombyx mori L.) parthenoclones, obtained by two different methods-thermal and combined, as well as to study their genotype structure by several enzyme loci. It was established that all individuals of parthenoclones Joana, Joana (↓↑), Pohi and Pohi (↓↑), are homozygous by the studied esterase and phosphoglucomutase loci, which substantiated the clones` genetic stability. By comparative analysis of some biological and technological properties, it was found that parthenoclone Pohi (↓↑) obtained by low-high temperature activation is characterized by higher values of these properties as compared to parthenoclone Pohi obtained by thermal parthenogenesis. Comparing the two methods of inducing ameiotic parthenogenetic development, we would recommend that parthenoclone Joana is sustained by thermal parthenogenesis, and parthenoclone Pohi-by the combined method (low-high temperature).
Vasileva, Jolanda Bogdanova,Staykova, Teodora Atanasova,Tzenov, Panomir Ivanov Korean Society of Sericultural Science 2009 International Journal of Industrial Entomology Vol.18 No.2
The purpose of this study was to establish whether there are differences in the productivity of the same silkworm(Bombyx mori L.) parthenoclones, obtained by two different methods-thermal and combined, as well as to study their genotype structure by several enzyme loci. It was established that all individuals of parthenoclones Joana, Joana(${\downarrow}{\uparrow}$), Pohi and Pohi(${\downarrow}{\uparrow}$), are homozygous by the studied esterase and phosphoglucomutase loci, which substantiated the clones' genetic stability. By comparative analysis of some biological and technological properties, it was found that parthenoclone Pohi(${\downarrow}{\uparrow}$) obtained by low-high temperature activation is characterized by higher values of these properties as compared to parthenoclone Pohi obtained by thermal parthenogenesis. Comparing the two methods of inducing ameiotic parthenogenetic development, we would recommend that parthenoclone Joana is sustained by thermal parthenogenesis, and parthenoclone Pohi-by the combined method (low-high temperature).
Visible Meridian Phenomena after Acupuncture: A Series of Case Reports
Nikolay Dimitrov,Nikola Tomov,Dimitrinka Atanasova,Stiliyan Iliev,Tatyana Tomova,Dimitar Sivrev,Zoya Goranova 사단법인약침학회 2021 Journal of Acupuncture & Meridian Studies Vol.14 No.2
Background: In accordance with the meridian theory of Traditional Chinese Medicine (TCM), meridian phenomena are observed along the course of a meridian following acupuncture. Their visible manifestations include alterations in the color (reddening or whitening) of the skin as well as papule and vesicle formation. Objectives: The aim of the present work is to report a series of visible meridian phenomena manifested in human subjects and to correlate them to TCM concepts. A total of 1,200 patients, on whom classical acupuncture (with standard single-use needles without electrostimulation or moxibustion) was applied, were carefully observed and documented. Methods: Visible meridian phenomena were photographed using standard photographical equipment and compared to classical acupuncture channels used by TCM. Results: Ten patients (5 male, 5 female) exhibited visible meridian phenomena. Lines, concurring with the meridians, were observed: white lines in seven cases and red lines in three cases. The duration of the two kinds of phenomena was different. White lines remained visible for a shorter period (10-15 min), whereas red lines were seen for up to one hour after needle removal. Conclusion: These observations indicate that visible meridian phenomena following acupuncture are objective, albeit rare, findings that coincide with the acupuncture channels described in the classical works of TCM. The presence of such phenomena provides a new insight into the concept of meridians and explains the development of the idea in its historical context.
Ameer Biadsee,Ofir Rosner,Carol Khalil,Vanina Atanasova,Joel Blushtein,Shifra Levartovsky 대한치과교정학회 2023 대한치과교정학회지 Vol.53 No.1
Objective: This study aimed to evaluate the shear bond strength (SBS) of orthodontic brackets bonded to three-dimensionally (3D)-printed materials after various surface treatments and artificial aging compared with that bonded to computer-aided design/computer-aided manufacturing (CAD-CAM) polymethyl methacrylate (PMMA)-milled materials. Methods: Eighty cylindrical specimens were 3D printed and divided into the following four subgroups (n = 20 each) according to the surface treatment and artificial aging procedure. Group A, sandblasted with 50 μm aluminum oxide particles (SA) and aging; group B, sandblasted with 30 μm silica-coated alumina particles (CO) and aging; group C, SA without aging; and group D, CO without aging. For the control group, 20 CAD-CAM PMMA-milled cylindrical specimens were sandblasted with SA and aged. The SBS was measured using a universal testing machine (0.25 mm/min), examined at ×2.5 magnification for failure mode classification, and statistically analyzed (p = 0.05). Results: The retention obtained with the 3D-printed materials (groups A–D) was higher than that obtained with the PMMA-milled materials (control group). However, no significant difference was found between the study and control groups, except for group C (SA without aging), which showed significantly higher retention than the control group (PMMA-SA and thermocycling) (p = 0.037). Study groups A–D predominantly exhibited a cohesive specimen mode, indicating specimen fracture. Conclusions: Orthodontic brackets bonded to 3D-printed materials exhibit acceptable bonding strengths. However, 3D-printed materials are prone to cohesive failure, which may result in crown fractures.
Lee, Kyulim,Roberts, JoAnn S.,Choi, Chul Hee,Atanasova, Kalina R.,Yilmaz, Ö,zlem TaylorFrancis 2018 Virulence Vol.9 No.1
<P><B>ABSTRACT</B></P><P><I>Porphyromonas gingivalis</I>, an opportunistic pathogen usurps gingival epithelial cells (GECs) as primary intracellular niche for its colonization in the oral mucosa. However, the precise characterization of the intracellular trafficking and fate of <I>P. gingivalis</I> in GECs remains incomplete. Therefore, we employed high-resolution three-dimensional-transmission-electron-microscopy to determine the subcellular location of <I>P. gingivalis</I> in human primary GECs upon invasion. Serial sections of infected-GECs and their tomographic reconstruction depicted ER-rich-double-membrane autophagosomal-vacuoles harboring <I>P. gingivalis</I>. Western-blotting and fluorescence confocal microscopy showed that <I>P. gingivalis</I> significantly induces LC3-lipidation in a time-dependent-manner and co-localizes with LC3, ER-lumen-protein Bip, or ER-tracker, which are major components of the phagophore membrane. Furthermore, GECs that were infected with FMN-green-fluorescent transformant-strain (PgFbFP) and selectively permeabilized by digitonin showed rapidly increasing large numbers of double-membrane-vacuolar-<I>P. gingivalis</I> over 24 hours of infection with a low-ratio of cytosolically free-bacteria. Moreover, inhibition of autophagy using 3-methyladenine or ATG5 siRNA significantly reduced the viability of intracellular <I>P. gingivalis</I> in GECs as determined by an antibiotic-protection-assay. Lysosomal marker, LAMP-1, showed a low-degree colocalization with <I>P. gingivalis</I> (∼20%). PgFbFP was used to investigate the fate of vacuolar- versus cytosolic-<I>P. gingivalis</I> by their association with ubiquitin-binding-adaptor-proteins, NDP52 and p62. Only cytosolic-<I>P. gingivalis</I> had a significant association with both markers, which suggests cytosolically-free bacteria are likely destined to the lysosomal-degradation pathway whereas the vacuolar-<I>P. gingivalis</I> survives. Therefore, the results reveal a novel mechanism for <I>P. gingivalis</I> survival in GECs by harnessing host autophagy machinery to establish a successful replicative niche and persistence in the oral mucosa.</P>
Structural dependencies of protein backbone<sup>2</sup><i>J</i><sub>NC′</sub>couplings
Juranić,, Nenad,Dannenberg, J.J.,Cornilescu, Gabriel,Salvador, Pedro,Atanasova, Elena,Ahn, Hee-Chul,Macura, Slobodan,Markley, John L.,Prendergast, Franklyn G. Wiley (John WileySons) 2008 Protein science Vol.17 No.4
<P>Protein folding can introduce strain in peptide covalent geometry, including deviations from planarity that are difficult to detect, especially for a protein in solution. We have found dependencies in protein backbone (2)J(NC') couplings on the planarity and the relative orientation of the sequential peptide planes. These dependences were observed in experimental (2)J(NC') couplings from seven proteins, and also were supported by DFT calculations for a model tripeptide. Findings indicate that elevated (2)J(NC') couplings may serve as reporters of structural strain in the protein backbone imposed by protein folds. Such information, supplemented with the H-bond strengths derived from (h3)J(NC') couplings, provides useful insight into the overall energy profile of the protein backbone in solution.</P>