87 research outputs found
Satellite Image Processing for Biodiversity Conservation and Environmental Modeling in Kyrgyz Republic National Park
There is a need for extensive surveys of living organisms at a global scale; digital data exchange and storage is an essential part of such studies. Biodiversity inventory of fungi, which play an essential role in the health of the mountainous conifer forests of a developing country – Kyrgyz Republic, was linked to the vegetation classification produced from the high-resolution satellite imagery. Terra ASTER and SRTM90 imagery was used as a base map for the ecosystem modeling of the species and habitat distribution and for the three-dimensional representation, especially valuable for the mountainous landscapes of the Ala Archa National Park. Image processing techniques with ER Mapper and ArcGIS/ArcInfo using ASTER bands and band ratios (NDVI, Brovey transform and 3/1, 4/3, 10/1) allowed distinguishing between vegetation community types and their complexes: mixed conifer and deciduous forests, dwarf juniper forests, cushion plants, shrublands, alpine grasslands, steppes, sagebrush semi-deserts, and complexes of grasslands and conifers
Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit
Intermediate level gate drive N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using advanced TrenchMOS technology. This product has been designed and qualified to the appropriate AEC Q101 standard for use in high performance automotive applications. 1.2 Features and benefits � AEC Q101 compliant � Suitable for standard and logic level gate drive sources � Suitable for thermally demanding environments due to 175 °C rating 1.3 Applications � 12 V Automotive systems � Electric and electro-hydraulic power steering � Motors, lamps and solenoid control � Start-Stop micro-hybrid applications � Transmission control � Ultra high performance power switching 1.4 Quick reference dat
Symbol Parameter Conditions Min Typ Max Unit Static characteristics
1. General description Logic level N-channel MOSFET in a D2PAK-7 package using TrenchPLUS MOSFET technology. The device includes TrenchPLUS current sensing and integrated diodes for temperature sensing. This product has been designed and qualified to AEC Q101 standard for use in high performance automotive applications. 2. Features and benefits • AEC-Q101 Compliant • Enables temperature monitoring due to integrated temperature sensor • Enables current sense measurement due to integrated current senseFET • Suitable for thermally demanding environments due to 175 °C ratin
Diversity of <i>mariner</i>-like elements in Orthoptera
Mariner-like elements (MLEs) are among the most widespread DNA transposable elements in eukaryotes. Insects were the first organisms in which MLEs were identified, however the diversity of MLEs in the insect order Orthoptera has not yet been addressed. In the present study, we explore the diversity of MLEs elements in 16 species of Orthoptera belonging to three infraorders, Acridoidea (Caelifera), Grylloidea (Ensifera), and Tettigoniidea (Ensifera) by combining data mined from computational analysis of sequenced degenerative PCR MLE amplicons and available Orthoptera genomic scaffolds. In total, 75 MLE lineages (Ortmar) were identified in all the studied genomes. Automatic phylogeny-based classification suggested that the current known variability of MLEs can be assigned to seven statistically well-supported phylogenetic clusters (I–VII), and the identified Orthoptera lineages were distributed among all of them. The majority of the lineages (36 out of 75) belong to cluster I; 20 belong to cluster VI; and seven, six, four, one and one lineages belong to clusters II, IV, VII, III, and V, respectively. Two of the clusters (II and IV) were composed of a single Orthoptera MLE lineage each (Ortmar37 and Ortmar45, respectively) which were distributed in the vast majority of the studied Orthoptera genomes. Finally, for 16 Orthoptera MLE lineages, horizontal transfer from the distantly related taxa belonging to other insect orders may have occurred. We believe that our study can serve as a basis for future researches on the diversity, distribution, and evolution of MLEs in species of other taxa that are still lacking the sequenced genomes
On the use of the group SO(4,2) in atomic and molecular physics
In this paper the dynamical noninvariance group SO(4,2) for a hydrogen-like
atom is derived through two different approaches. The first one is by an
established traditional ascent process starting from the symmetry group SO(3).
This approach is presented in a mathematically oriented original way with a
special emphasis on maximally superintegrable systems, N-dimensional extension
and little groups. The second approach is by a new symmetry descent process
starting from the noninvariance dynamical group Sp(8,R) for a four-dimensional
harmonic oscillator. It is based on the little known concept of a Lie algebra
under constraints and corresponds in some sense to a symmetry breaking
mechanism. This paper ends with a brief discussion of the interest of SO(4,2)
for a new group-theoretical approach to the periodic table of chemical
elements. In this connection, a general ongoing programme based on the use of a
complete set of commuting operators is briefly described. It is believed that
the present paper could be useful not only to the atomic and molecular
community but also to people working in theoretical and mathematical physics.Comment: 31 page
The type numbers of closed geodesics
A short survey on the type numbers of closed geodesics, on applications of
the Morse theory to proving the existence of closed geodesics and on the recent
progress in applying variational methods to the periodic problem for Finsler
and magnetic geodesicsComment: 29 pages, an appendix to the Russian translation of "The calculus of
variations in the large" by M. Mors
Another Adelaida: Dostoevsky’s The Idiot in Nabokov’s Ada
It appears…that Ada scholars have overlooked the only Adelaida existing in major Russian literature. It is Adelaida Yepanchina, the middle daughter of General Yepanchin in Dostoevsky\u27s The Idiot (1868). All three daughters have names starting with A : Alexandra, Adelaida, Aglaya (compare this to Nabokov\u27s Anya-Ada-Asya)
Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit
Standard level gate drive N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using advanced TrenchMOS technology. This product has been designed and qualified to the appropriate AEC standard for use in high performance automotive applications. 1.2 Features and benefits � AEC-Q101 compliant � Avalanche robust � Suitable for standard level gate drive � Suitable for thermally demanding environment due to 175 °C rating 1.3 Applications � 12 V Motor, lamp and solenoid loads � High performance automotive power systems � High performance Pulse Width Modulation (PWM) applications 1.4 Quick reference dat
- …