2,316 research outputs found
Cydnidae (Heteroptera) from the Oriental Region and New Guinea
Faunistical data of 29 species of Cydnidae are presented. Chilocoris montanus LIS, 1994 is new to the fauna of India, Fromundus pseudopacus LIS, 1994 to Thailand and Laos, Chilocoris assmuthi BREDDIN, 1904, Parachilocoris semialbidus (WALKER, 1867), Macroscytus tenasserimus
LIS, 1991 and Pseudoscoparipes nilgiricus LIS, 1990 to Laos, Aethoscytus baloni (LIS, 1994), Aethus indicus (WESTWOOD, 1837) and Fromundus impunctatus LIS, 1994 to Vietnam, Aethus pseudindicus LIS, 1993 and Lactistes mediator (BREDDIN, 1909) to Nepal, Macroscytus aequalis (WALKER, 1867) to Pakistan and New Guinea. With 4 figures
Ecology of the Acalypta species occurring in Hungary Insecta Heteroptera Tingidae data to the knowledge on the ground-living Heteroptera of Hungary, No 3
As a third part of a series of papers on the ground-living true bugs of Hungary, the species
belonging to the lace bug genus Acalypta Westwood, 1840 (Insecta: Heteroptera: Tingidae) were studied.
Extensive materials collected with Berlese funnels during about 20 years all over Hungary were
identified. Based on these sporadic data of many years, faunistic notes are given on some Hungarian
species. The seasonal occurrence of the species are discussed. The numbers of specimens of different
Acalypta species collected in diverse plant communities are compared with multivariate methods.
Materials collected with pitfall traps between 1979–1982 at Bugac, Kiskunság National Park were also
processed. In this area, only A. marginata and A. gracilis occurred, both in great number. The temporal
changes of the populations are discussed. Significant differences could be observed between the
microhabitat distribution of the two species: both species occurred in very low number in traps placed out
in patches colonized by dune-slack purple moorgrass meadow; Acalypta gracilis preferred distinctly the
Pannonic dune open grassland patches; A. marginata occurred in almost equal number in Pannonic dune
open grassland and in Pannonic sand puszta patches
Composition of zooplankton assemblages along the Zagyva River
The species composition, longitudinal distribution and seasonal dynamics of zooplankton were
studied in the Zagyva River, Hungary. A total of 108 taxa was recorded from which 61 were new for the
river. Rotatoria was the most abundant group, microcrustaceans were less important, only nauplii and
copepodites were represented in similar individual numbers. Frequent species included Anuraeopsis fissa,
Pompholyx spp., Keratella cochlearis, Brachionus angularis, Bdelloida sp., Bosmina longirostris.
Dominance of cosmopolitan species was observed both in the river and its reservoir, and species
characteristic of eutrophic waters were of major importance in the latter. There was a downstream
decrease in zooplankton densities, which was explained by modified conditions. The relatively large
number of individuals in autumn months, and the characteristic large number of individuals in the upper
section contrasted general findings of potamoplankton dynamics. On the basis of the species abundance
matrix, three river sections can be distinguished (upper, middle, lower section). Due to waste water
discharges - received from the Tarján Stream - we found extremely high number of individuals and the
lowest diversity at the sampling site Nagybátony (148 rkm)
Large Scale Job Management and Experience in Recent Data Challenges within the LHC CMS experiment
From its conception the job management system has been distributed to increase scalability and robustness. The system consists of several applications (called ProdAgents) which manage Monte Carlo, reconstruction and skimming jobs on collections of sites within different Grid environments (OSG, NorduGrid, LCG) and submission systems such as GlideIn, local batch, etc...
Production of simulated data in CMS mainly takes place on so called Tier2s (small to medium size computing centers) resources. Approximately ~50% of the CMS Tier2 resources are allocated to running simulation jobs. While the so-called Tier1s (medium to large size computing centers with high capacity tape storage systems) will be mainly used for skimming and reconstructing detector data. During the last one and a half years the job management system has been adapted such that it can be configured to convert Data Acquisition (DAQ) / High Level Trigger (HLT) output from the CMS detector to the CMS data format and manage the real time data stream from the experiment. Simultaneously the system has been upgraded to facilitate the increasing scale of the CMS production and adapting to the procedures used by its operators.
In this paper we discuss the current (high level) architecture of ProdAgent, the experience in using this system in computing challenges, feedback from these challenges, and future work including migration to a set of core libraries to facilitate convergence between the different data management projects within CMS that deal with analysis, simulation, and initial reconstruction of real data. This migration is important, as it will decrease the code footprint used by these projects and increase maintainability of the code base
Mechanical Stress Inference for Two Dimensional Cell Arrays
Many morphogenetic processes involve mechanical rearrangement of epithelial
tissues that is driven by precisely regulated cytoskeletal forces and cell
adhesion. The mechanical state of the cell and intercellular adhesion are not
only the targets of regulation, but are themselves likely signals that
coordinate developmental process. Yet, because it is difficult to directly
measure mechanical stress {\it in vivo} on sub-cellular scale, little is
understood about the role of mechanics of development. Here we present an
alternative approach which takes advantage of the recent progress in live
imaging of morphogenetic processes and uses computational analysis of high
resolution images of epithelial tissues to infer relative magnitude of forces
acting within and between cells. We model intracellular stress in terms of bulk
pressure and interfacial tension, allowing these parameters to vary from cell
to cell and from interface to interface. Assuming that epithelial cell layers
are close to mechanical equilibrium, we use the observed geometry of the two
dimensional cell array to infer interfacial tensions and intracellular
pressures. Here we present the mathematical formulation of the proposed
Mechanical Inverse method and apply it to the analysis of epithelial cell
layers observed at the onset of ventral furrow formation in the {\it
Drosophila} embryo and in the process of hair-cell determination in the avian
cochlea. The analysis reveals mechanical anisotropy in the former process and
mechanical heterogeneity, correlated with cell differentiation, in the latter
process. The method opens a way for quantitative and detailed experimental
tests of models of cell and tissue mechanics
X-ray reflectivity measurement of interdiffusion in metallic multilayers during rapid heating
A technique for measuring interdiffusion in multilayer materials during rapid heating using X-ray reflectivity is described. In this technique the sample is bent to achieve a range of incident angles simultaneously, and the scattered intensity is recorded on a fast high-dynamic-range mixed-mode pixel array detector. Heating of the multilayer is achieved by electrical resistive heating of the silicon substrate, monitored by an infrared pyrometer. As an example, reflectivity data from Al/Ni heated at rates up to 200 K s^(−1) are presented. At short times the interdiffusion coefficient can be determined from the rate of decay of the reflectivity peaks, and it is shown that the activation energy for interdiffusion is consistent with a grain boundary diffusion mechanism. At longer times the simple analysis no longer applies because the evolution of the reflectivity pattern is complicated by other processes, such as nucleation and growth of intermetallic phases
Learning Latent Factor Models of Travel Data for Travel Prediction and Analysis
Abstract. We describe latent factor probability models of human travel, which we learn from data. The latent factors represent interpretable properties: travel distance cost, desirability of destinations, and affinity between locations. Individuals are clustered into distinct styles of travel. The latent factors combine in a multiplicative manner, and are learned using Maximum Likelihood. We show that our models explain the data significantly better than histogrambased methods. We also visualize the model parameters to show information about travelers and travel patterns. We show that different individuals exhibit different propensity to travel large distances. We extract the desirability of destinations on the map, which is distinct from their popularity. We show that pairs of locations have different affinities with each other, and that these affinities are partly explained by travelers ’ preference for staying within national borders and within the borders of linguistic areas. The method is demonstrated on two sources of travel data: geotags from Flickr images, and GPS tracks from Shanghai taxis.
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