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Search Results: 1 - 10 of 305323 matches for " V. P. Bolotsky "
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A New 76Ge Double Beta Decay Experiment at LNGS
I. Abt,M. Altmann,A. Bakalyarov,I. Barabanov,C. Bauer,E. Bellotti,S. T. Belyaev,L. Bezrukov,V. Brudanin,C. Buettner,V. P. Bolotsky,A. Caldwell,C. Cattadori,H. Clement,A. Di Vacri,J. Eberth,V. Egorov,G. Grigoriev,V. Gurentsov,K. Gusev,W. Hampel,G. Heusser,W. Hofmann,J. Jochum,M. Junker,J. Kiko,I. V. Kirpichnikov,A. Klimenko,K. T. Knoepfle,V. N. Kornoukhov,M. Laubenstein,V. Lebedev,X. Liu,I. Nemchenok,L. Pandola,V. Sandukovsky,S. Schoenert,S. Scholl,B. Schwingenheuer,H. Simgen,A. Smolnikov,A. Tikhomirov,A. A. Vasenko,S. Vasiliev,D. Weisshaar,E. Yanovich,J. Yurkowski,S. Zhukov,G. Zuzel
Physics , 2004,
Abstract: This Letter of Intent has been submitted to the Scientific Committee of the INFN Laboratori Nazionali del Gran Sasso (LNGS) in March 2004. It describes a novel facility at the LNGS to study the double beta decay of 76Ge using an (optionally active) cryogenic fluid shield. The setup will allow to scrutinize with high significance on a short time scale the current evidence for neutrinoless double beta decay of 76Ge using the existing 76Ge diodes from the previous Heidelberg-Moscow and IGEX experiments. An increase in the lifetime limit can be achieved by adding more enriched detectors, remaining thereby background-free up to a few 100 kg-years of exposure.
A New Saurolophine Dinosaur from the Latest Cretaceous of Far Eastern Russia
Pascal Godefroit, Yuri L. Bolotsky, Pascaline Lauters
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0036849
Abstract: Background Four main dinosaur sites have been investigated in latest Cretaceous deposits from the Amur/Heilongjiang Region: Jiayin and Wulaga in China (Yuliangze Formation), Blagoveschensk and Kundur in Russia (Udurchukan Formation). More than 90% of the bones discovered in these localities belong to hollow-crested lambeosaurine saurolophids, but flat-headed saurolophines are also represented: Kerberosaurus manakini at Blagoveschensk and Wulagasaurus dongi at Wulaga. Methodology/Principal Findings Herein we describe a new saurolophine dinosaur, Kundurosaurus nagornyi gen. et sp. nov., from the Udurchukan Formation (Maastrichtian) of Kundur, represented by disarticulated cranial and postcranial material. This new taxon is diagnosed by four autapomorphies. Conclusions/Significance A phylogenetic analysis of saurolophines indicates that Kundurosaurus nagornyi is nested within a rather robust clade including Edmontosaurus spp., Saurolophus spp., and Prosaurolophus maximus, possibly as a sister-taxon for Kerberosaurus manakini also from the Udurchukan Formation of Far Eastern Russia. The high diversity and mosaic distribution of Maastrichtian hadrosaurid faunas in the Amur-Heilongjiang region are the result of a complex palaeogeographical history and imply that many independent hadrosaurid lineages dispersed without any problem between western America and eastern Asia at the end of the Cretaceous.
Cranial Endocast of the Lambeosaurine Hadrosaurid Amurosaurus riabinini from the Amur Region, Russia
Pascaline Lauters, Martine Vercauteren, Yuri L. Bolotsky, Pascal Godefroit
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0078899
Abstract: Information on the structure of the brain of the lambeosaurine hadrosaurid dinosaur Amurosaurus riabinini, from the Late Maastrichtian of Blagoveschensk, Far Eastern Russia, is presented based on endocranial casts. The endocasts are compared with physical and digital endocasts of other dinosaurs. The olfactory tract was large. The cerebral hemispheres are enlarged and round, illustrating the important development of this part of the brain in hadrosaurids. The pituitary body is enlarged as well, perhaps prefiguring the large size attained by hadrosaurids. The EQ of Amurosaurus was similar to that of the lambeosaurine dinosaur Hypacrosaurus altispinus and was relatively larger than in most extant non-avian reptiles, including sauropod and ceratopsian dinosaurs. However, it was apparently relatively smaller than those of most theropod dinosaurs. The relatively large size of the cerebrum is consistent with the range and complexity of social behaviors inferred for lambeosaurine dinosaurs.
Neutrino Riddles  [PDF]
V. P. Efrosinin
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.310196
Abstract: The possible reasons of features of the nature of neutrino are discussed.
Estimates for Holomorphic Functions with Values in C\{0,1}  [PDF]
P. V. Dovbush
Advances in Pure Mathematics (APM) , 2013, DOI: 10.4236/apm.2013.36075
Abstract:

Extension of classical Mandelbrojt’s criterion for normality to several complex variables is given. Some inequalities for holomorphic functions which omit values 0 and 1 are obtained.

A Modified Method for Deriving Self-Conjugate Dirac Hamiltonians in Arbitrary Gravitational Fields and Its Application to Centrally and Axially Symmetric Gravitational Fields  [PDF]
M. V. Gorbatenko, V. P. Neznamov
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.63034
Abstract: We have proposed previously a method for constructing self-conjugate Hamiltonians Hh in the h-representation with a flat scalar product to describe the dynamics of Dirac particles in arbitrary gravitational fields. In this paper, we prove that, for block-diagonal metrics, the Hamiltonians Hh can be obtained, in particular, using “reduced” parts of Dirac Hamiltonians, i.e. expressions for Dirac Hamiltonians derived using tetrad vectors in the Schwinger gauge without or with a few summands with bispinor connectivities. Based on these results, we propose a modified method for constructing Hamiltonians in the h-representation with a significantly smaller amount of required calculations. Using this method, here we for the first time find self-conjugate Hamiltonians for a number of metrics, including the Kerr metric in the Boyer-Lindquist coordinates, the Eddington-Finkelstein, Finkelstein-Lemaitre, Kruskal, Clifford torus metrics and for non-stationary metrics of open and spatially flat Friedmann models.
FEM Based Study of Concentration of Proliferating Cell in Brain Tumor  [PDF]
Sushma Nema, V. P. Saxena
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.38140
Abstract: In this chapter we have developed a deterministic model of growth of abnormal cell concentration in a human subject at different positions. The diffusion-reaction Equation has been applied to satisfy growth dynamics .The whole tumor region is divided into layers which, with the growth of tumor form necrotic, quiescent and region of proliferating of tumor cells. Finite element method for one dimension has been employed for solving the Equations. Here we have taken into account the cellular motility along with proliferative growth ,which is particularly required in case of some of the brain tumors, where motility of gliomas cells differ widely in gray and white matter.
A Note on Acyclic Edge Colouring of Star Graph Families  [PDF]
P. Shanasbabu, A. V. Chithra
American Journal of Computational Mathematics (AJCM) , 2015, DOI: 10.4236/ajcm.2015.53022
Abstract: A proper edge colouring f of a graph G is called acyclic if there are no bichromatic cycles in the graph. The acyclic edge chromatic number or acyclic chromatic index, denoted by \"\", is the minimum number of colours in an acyclic edge colouring of G. In this paper, we discuss the acyclic edge colouring of middle, central, total and line graphs of prime related star graph families. Also exact values of acyclic chromatic indices of such graphs are derived and some of their structural properties are discussed.
Berberine Prolongs Life Span and Stimulates Locomotor Activity of Drosophila melanogaster  [PDF]
V. V. Navrotskaya, G. Oxenkrug, L. I. Vorobyova, P. Summergrad
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.327123
Abstract: Drosophila melanogaster mutants with deficient kynurenine (KYN) formation from tryptophan (TRP) have longer life span than wild type flies. Administration of alpha-methyl-TRP and 5-methyl-TRY, the inhibitors of TRP-KYN metabolism, prolonged life span in wild-type flies. Both inhibitors are not available for human use. Berberine, an isoquinoline alkaloid isolated from berberis aristata is known as the herb widely used in traditional Chinese and Indian medicine. Berberin is a strong inhibitor of the enzyme catalyzing TRP conversion into KYN. Considering this particular feature we investigated the effect of berberine on life-and health-span in wild-type Drosophila melanogaster. The results of our study showed that Berberine extended mean, median and maximum life span of female flies. Berberine did not affect the number of pupae of filial generation and decreased their lethality. Berberine increased locomotor activity (vertical climbing). The results of the study suggest that berberine prolongs life- and improves health-span of Drosophila melanogaster. Berberine might be a candidate drug for prevention and treatment of aging and aging-associated medical and psychiatric disorders.
Optimum Load Shedding in Power System Strategies with Voltage Stability Indicators  [PDF]
P.V. RAJ, M. SUDHAKARAN
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.21002
Abstract: An optimal load shedding strategy for power systems with optimum location and quantity of load to be shed is presented in this paper. The problem of load shedding for avoiding the existence of voltage instability in power systems is taken as a remedial action during emergency state in transmission and distribution sector.Optimum location of loads to be shed is found together with their optimum required quantity. L-Indicator index is in used for this purpose with a modified new technique. Applications to be standard 6 bus Ward-Hale test system and IEEE – 14 bus system are presented to validate the applicability of the proposed technique to any system of any size.
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