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L’INGRATITUDE DE YING CHEN: UN ROMAN NEO-EXISTENTALISTE?
Yavor Petkov(Yavor Petkov ) 한국캐나다학회 2013 Asia-Pacific Journal of Canadian Studies (APJCS) Vol.19 No.2
Ce texte étudie les liens intertextuels entre L’Ingratitude - probablement, le roman le mieux connu de l’écrivaine canadienne d’origine chinoise et d’expression française Ying Chen - et la pièce Les Mains sales de Jean-Paul Sartre. Il se propose de trouver dans quelle mesure les deux textes communiquent entre eux et comment l’intertextualité contribue à l’esthétique du roman de Chen. L’étude offre une analyse structuraliste des deux textes aux niveaux des personnages et de l’intrigue. Elle conclut que les deux textes présentent de fortes similitudes aux deux niveaux et véhiculent des messages comparables. Cette comparaison se propose d’initier une nouvelle approche de l’oeuvre de Chen et, plus généralement, du mouvement québécois dit écritures migrantes, qui pourrait désormais être appréhendé comme une forme de néo-existentialisme.
Petkov N.,Petkov Z.,Grekov D.,Arnaudova K. Korean Society of Sericultural Science 2005 International Journal of Industrial Entomology Vol.11 No.1
Inheritance of cocoon and shell weight characters in silkworm crosses between sex-limited at larva stage lines, including three (NIG$_{1}$ $\times$ TV$_{3/2}$ ,NIG$_{1}$ $\times$ TBV$_{2/24}$ and NIG$_{1}$ $\times$ B$_{2/6}$ ) from Japanese type and three (NIG$_{2}$ $\times$ B$_{2/6}$ ,TV$_{3/2}$ $\times$ NIG$_{1}$ and NIG$_{2}$ $\times$ TBV$_{2/24}$ ) from Chinese type was studied at Regional Centre for ScientificApplied Service - Vratza during the period of 2000 2002. Inheritance of tested characters in F I was determined through genetic parameters, additiveness (a), dominance (d) and their ratio (d/a). Degree and frequency of transgressions in F$_{2}$ were calculated also. Over dominance (d/a(>) 1) with bigger contribution of the parent with higher value was determined at inheritance tested characters. Transgressions obtained at cocoon and shell weight characters were positive and varied in wide limits. The productivity of parent's lines had defined the variability of genetic parameters for degree and frequency of transgressions. Combination of positive transgressions at cocoon and shell weight characters in F2 hybrid populations from sex-limited at larva stage allow us to select individuals with high productive potential for further use in selection programs.
Petkov, N.,Petkov, Z.,Grekov, D.,Arnaudova, K. Korean Society of Sericultural Science 2004 International Journal of Industrial Entomology Vol.9 No.1
To evolve silkworm hybrids with higher survival and productivity and easy and effective seed cocoon production, three new evolved bivoltine hybrids of silkworm (Bombyx mori L.), created with participation of sex-limited lines at eggs and larva stage were evaluated with control Super$_1$${\times}$Hessa$_2$ hybrid at Plovdiv Agrarian University during 2000 - 2002. ANOVA analysis was employed and the performance of hybrids was observed in respect of main quantitative traits. The results obtained show significant superiority of new hybrids T$_{15}$ 4/${\times}$TBV$_{2}$24/, XT$_{215}$38/${\times}$TV$_{3}$2/, XT$_{215}$38/${\times}$B$_{2}$6/ and their reciprocal crosses over the control. They were characterized with 99% hatchability of eggs, 93-95% silkworm survival, 2.32- 2.42 g cocoon weight, 53.5-55.7 cg shell weight, 22.9-23.1% shell ratio, 1,307-1,326 m filament length, 3.08-3.17 denier, 95-96% reelability, 44.4-45.1% silk ratio, 569-593 number of normal eggs per lying and 347-364 mg weight of normal eggs per lying. Newly evolved hybrids were manifested high productivity, 41.0-43.6 kg cocoon yield and 7.33-7.78 kg raw silk yield per one box (20,000$\pm$200 viable eggs), which significant surpass the control Super$_1$${\times}$Hessa$_2$ hybrid with 7.6-14.4% and 10.8-17.6%, respectively. T$_{15}$ 4/${\times}$TBV$_{2}$24/ and XT$_{215}$38/${\times}$TV$_{3}$2/ were considered as highly productive hybrids to local conditions and found suitable to rear in spring season.n.
( N. Petkov ),( Z. Petkov ),( D. Grekov ),( K. Arnaudova ) 한국잠사학회 2005 International Journal of Industrial Entomology Vol.11 No.1
Inheritance of cocoon and shell weight characters in silkworm crosses between sex-limited at larva stage lines, including three (NIG1×TV3/2, NIG1×TBV2/24 and NIG1×B2/6) from Japanese type and three (NIG2×B2/6, TV3/2×NIG1 and NIG2×TBV2/24) from Chinese type was studied at Regional Centre for Scientific Applied Service-Vratza during the period of 2000-2002. Inheritance of tested characters in F1 was determined through genetic parameters, additiveness (a), dominance (d) and their ratio (d/a). Degree and frequency of transgressions in F2 were calculated also. Over dominance (d/a>1) with bigger contribution of the parent with higher value was determined at inheritance tested characters. Transgressions obtained at cocoon and shell weight characters were positive and varied in wide limits. The productivity of parent`s lines had defined the variability of genetic parameters for degree and frequency of transgressions. Combination of positive transgressions at cocoon and shell weight characters in F2 hybrid populations from sex-limited at larva stage allow us to select individuals with high productive potential for further use in selection programs.
Petkov, Naoum,Grekov, Dimitar,Ramnali, Paraskevi Korean Society of Sericultural Science 2001 International Journal of Industrial Entomology Vol.2 No.1
A study was conducted to establish the degree of genetic divergence between different hybrid forms and rearing conditions through estimation of the minimum number of genes (allelic pairs) differentiating parents in terms of specific quantitative traits. It was established that the minimum gene numbers differentiating parental lines in the inheritance of cocoon was 1, of cocoon shell weight- between 1 and 2, and of silk filament length- between 2 and 3. The variability in the specific genetic parameter could be explained by the reliability of the statistical-and-genetic method used and the expression of genes affecting the formation of each of the characters tested. Gene expression, in its turns is conditioned both by the gene interaction within the genotypes and the different genotype response to environmental change. To go deep in the problem, experiments should be conducted under strictly controlled conditions, reducing the mathematical-and-genetic analysis to a physiological levels and hence to analyse the genetic nature of the specific quantitative character formation and its genetic control.
Petkov, Valeri,Prasai, Binay,Shastri, Sarvjit,Park, Hyun-Uk,Kwon, Young-Uk,Skumryev, Vassil The Royal Society of Chemistry 2017 Nanoscale Vol.9 No.40
<P>Practical applications require the production and usage of metallic nanocrystals (NCs) in large ensembles. Besides, due to their cluster−bulk solid duality, metallic NCs exhibit a large degree of structural diversity. This poses the question as to what atomic-scale basis is to be used when the structure-function relationship for metallic NCs is to be quantified precisely. We address the question by studying bi-functional Fe core−Pt skin type NCs optimized for practical applications. In particular, the cluster-like Fe core and skin-like Pt surface of the NCs exhibit superparamagnetic properties and a superb catalytic activity for the oxygen reduction reaction, respectively. We determine the atomic-scale structure of the NCs by non-traditional resonant high-energy X-ray diffraction coupled to atomic pair distribution function analysis. Using the experimental structure data we explain the observed magnetic and catalytic behavior of the NCs in a quantitative manner. Thus we demonstrate that NC ensemble-averaged 3D positions of atoms obtained by advanced X-ray scattering techniques are a very proper basis for not only establishing but also quantifying the structure-function relationship for the increasingly complex metallic NCs explored for practical applications.</P>
NATURAL RESOURCE ABUNDANCE: IS IT A BLESSING OR IS IT A CURSE
BORIS PETKOV 중앙대학교 경제연구소 2018 Journal of Economic Development Vol.43 No.3
The entire subject of what creates a curse rather than a blessing and how to bring about the second and avoid the earlier is a particularly complex area for discussion. It is conspicuous that countries with natural resource wealth have experienced inferior economic growth in comparison to those devoid of such gifts. We advance the following propositions: i) there is evidence that natural resource abundance is associated with negative development outcomes; ii) current explanations of the resource curse do not sufficiently account for the role of the socio-economic background; iii) counteractive policy measures in alleviating/ preventing the resource curse are feasible.