Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Solvable Lie algebras are not that hypo  [PDF]
Diego Conti,Marisa Fernandez,Jose A. Santisteban
Mathematics , 2010, DOI: 10.1007/s00031-011-9127-8
Abstract: We study a type of left-invariant structure on Lie groups, or equivalently on Lie algebras. We introduce obstructions to the existence of a hypo structure, namely the 5-dimensional geometry of hypersurfaces in manifolds with holonomy SU(3). The choice of a splitting g^*=V_1 + V_2, and the vanishing of certain associated cohomology groups, determine a first obstruction. We also construct necessary conditions for the existence of a hypo structure with a fixed almost-contact form. For non-unimodular Lie algebras, we derive an obstruction to the existence of a hypo structure, with no choice involved. We apply these methods to classify solvable Lie algebras that admit a hypo structure.
说雨  [PDF]
力学与实践 , 2003, DOI: 10.6052/1000-0992-2002-303
Abstract: 阐述雨、云形成的原因和过程,及与风的关系.
Hypo, hype and ’hyp’ human proteins  [cached]
Prashanth Suravajhala
Bioinformation , 2007,
Abstract: Genes with unknown function are called orphan genes while their transcripts and peptides are called hypothetical proteins. There are many genes and their associated proteins that remain uncharacterized in the human genome. A database of human hypothetical proteins with ascribed functions could be helpful for biologists to search for potential proteins of interest. In recent years, the rapid completion of genome sequences has created essential information to link genes to gene products. In order to better explain functions for un-annotated proteins we designed BioinformaTRICKS (an open source) and used it to develop a database called HYPO. The database is available for free at http://pc-dugong.ruc.dk:8080.
Edge of the Wedge Theory in Hypo-Analytic Manifolds  [PDF]
Michael G. Eastwood,C. Robin Graham
Mathematics , 2001,
Abstract: This paper studies microlocal regularity properties of the distributions f on a strongly noncharacteristic submanifold E of a hypo-analytic manifold M that arise as the boundary values of solutions on wedges in M with edge E. The hypo-analytic wave-front set of f in the sense of Baouendi-Chang-Treves is constrained as a consequence of the fact that f extends as a solution to a wedge.
Status of woodland caribou in Alberta
J. Edmonds
Rangifer , 1998,
Abstract: A recent review of woodland caribou {Rangifer tarandus caribou) status in Alberta estimated that there are between 3600 and 6700 caribou occupying 113 000 km2 of habitat. There are two ecotypes of caribou in Alberta; the mountain ecotype in the west central region and the boreal ecotype primarily in the north. Mountain caribou populations are stable or declining and boreal populations, where data are available, appear to be stable or declining slowly. A major initiative in caribou management in Alberta has been the development of the Woodland Caribou Conservation Strategy. This document was developed over two and a half years by a committee of multi-stakeholder representatives. The past five years has seen an increase in baseline inventory and applied research jointly funded by government, industry and universities, addressing a wide range of management issues from caribou response to logging to interactions of moose, wolves and caribou in the boreal ecosystem. Land use conflicts on caribou range remain high with timber harvesting, oil and gas development, peat moss extraction, coal mining, agricultural expansion and increasing road access overlapping. Cumulative effects of these disturbances are poorly understood and have received little attention to date.

JIAO Ju-Ying,WANG Wan-Zhong,

植物生态学报 , 2000,
Abstract: Using rainfall erosion data from a woodland and a grassland runoff plot in Snide, Yanan and Ausai on the loess plateau, the effective cover rate of woodland and grassland for soil and water conservation in different rainfall and slope conditions was analyzed. The relationship between the critical effective cover rate (v) and a rainfall index (product of total rainfall amount and maximum 30 min rainfall intensity represented by (Pi30)) and slope steepness (s)is: woodland: v =- 103. 29 33. 81log (Pi30 ) 75. 38log (s) grassland: v =- 103. 20 34. 62log (Pi30 ) 78. 97log (s) The results indicate that the effective cover rate of woodland and grassland increases with increasing rainfall and slope when soil and vegetation are relatively in the same condition, the conditional effect of rainfall and slope on effective cover rate weaken when the critical effective cover rate reaches a certain level. When other conditions remain equal, the suggested effective cover rate of grassland is higher than that of woodland in the same soil and water conservation effectiveness. Finally, through a rainfall frequency analysis, a critical effective cover rate of wood and grass land to fight different rainstorm is obtained.
Status of woodland caribou in Saskatchewan
Jim Rettie,Terry Rock,Francois Messier
Rangifer , 1998,
Abstract: Recent research has shown that woodland caribou in Saskatchewan exist as relatively separate populations within a metapopulation. Preliminary analyses show that individuals within all populations are selecting peatland habitat types (i.e., fens and bogs) throughout the year. Despite an absence of hunting, populations south of the Precambrian shield appear to be declining slowly, while those on the southern margin of the shield may be declining more rapidly. The apparent population decline is likely due to high rates of predation, especially on neonates. To maintain viable caribou populations in the region, forestry operations must be managed to maintain adequate amounts of preferred habitat types and connections among populations. At a coarse scale, preferred habitat is that which acts as a refuge from predators. Additional information is required to categorize specific peatland types, as data in the existing provincial forest inventory are inadequate for both selection analysis and management purposes. Ongoing research into revisions to the forest inventory and analyses of bog and fen types selected by caribou are needed to focus future management strategies.

Zhu Zhi-cheng Jia Dong-lin,

植物生态学报 , 1991,
Abstract: Not only the distribution range of the Spodiopogon sibiricus communityon woodland of the loess plateau in north Shanxi Province is widespread,its quality is also excellent. It occupies a very important position in ani-mal husbandry. We have investigated the seasonal and spacial variationof both aboveground part and underground biomass in Spodiopogon sibiri-cus community. The result indicates that: the biomass seasonal dynamicswas evident, the biomass of aboveground achieved peak value (243.lg/m~2)in the midmonth of September; the biomass of underground was mediumduring the reviving period, minimum during flourishing period, maximumduring the withering period. The observed facts are related to the stagesand organic matter transport.

SHAN Sheng-dao,YOU Jian-xin,

资源科学 , 2003,
Abstract: woodland gradahon and appraisement is an innovative work in China. It's important in many fields, such as enriching the management information system of land registration, perfecting new national economy accounting system, disposing woodland resource rationally, promoting public accumulation, and so on. Woodland gradation and appraisement is also necessary for practicing the paid use of woodland resource, cultivating woodland market and stimulating the orderly circulation of the use right of woodland. Therefore, the author provides the factors should be taken into consideration for appraisement which can be divided into two groups as the natural and environmental factors and the social and economic factors. The natural and environmental factors include soil, topography, height above sea level, climate, hydrology, vegetation, natural calamity and environmental quality. The social and economic factors include the utilization way of woodland, traffic location, infrastructure, policy, technology and population. The appraisement factors are chosen based on typical regions and woodland types in grading and appraising the woodland. Furthermore, taking Wenzhou Chashan forest park as an example, the method on gradation and assessment of the woodland is explored in detail.
Tinea Faciei – Hypo Diagnosed Facial Dermatoses
Agron Starova,Margareta Balabanova Stefanova,Mihael Skerlev
Macedonian Journal of Medical Sciences , 2010,
Abstract: Background. Tinea faciei is dermatophytoses limited to the nonbearded regions of the face. The objectives of the study are: to assess the frequency of the Tinea faciei patients, the most common causative dermatophytic species and to point out on great diversity of clinical presentation of Tinea faciei. Patients and Methods. The patients with Tinea facie treated in the Mycological Ambulance, Department of Dermatology, Medical Faculty in Skopje, during the period Jun 2007 - Jan 2009 were evaluated. The diagnosis was confirmed by microscopic examination of skin and hair specimens and by culture on Sabouraud’s medium with added chloramphenicol, gentamycin and actidion. Results. Six hundreds patients with dermatophytosis were diagnosed over a time period of twenty months (Jun 2007 – January 2009). The Tinea faciei patients represented 2.2% (13) of all patients with dermatophytosis. Most frequently isolated dermatophytic species are Trichophyton verrucosum (38.46% of all Tinea faciei patients), Microsporum canis (30.77%), Trichophyton rubrum (23.08%) and Trichophyton mentagrophytes var. mentagrophytes (7.69%). The zoophylic dermatophytic species are predominant. All of the Tinea faciei patients are initially misdiagnosed as having other dermatoses.Conclusions. In patients with erythematous lesions of the face, a diagnosis of Tinea faciei should be considered. The variable morphology of Tinea faciei creates a large differential diagnosis. The frequent atypical clinical features and incognito presentations make Tinea faciei a unique and most frequently hypo diagnosed facial dermatoses with often delayed appropriate treatment.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.