176,316 research outputs found
Three new species of Paragnorimus Becker from Central America (Coleoptera: Scarabaeidae: Cetoniinae: Trichiini) with a redefinition of the genus
Three new species of Paragnorimus Becker are described: Paragnorimus atratus n. sp. from Guatemala, P. hondurensis n. sp. from Honduras and Nicaragua, and P. howdeni n. sp. from Guatemala. Based on the overlapping characters of these new species, the genus Peltotrichius Howden is placed in synonymy with Paragnorimus. Paragnorimus is given a broader definition to encompass the new species and the two species formerly placed in the genus Peltotrichius
South American Melolonthinae (Coleoptera: Scarabaeidae) classification and nomenclature: some problems and solutions
Classificatory changes are made for some taxa of New World Melolonthinae based on the examination of specimens (including type specimens) and a reevaluation of some of the characters used to justify previous classification decisions. Blepharotoma angustata (Blanchard) (new combination) is transferred from the genus Aplodema Blanchard. The Neotropical members of the genus Heteronyx GuĂ©rin-MĂ©neville are transferred to the genus Blepharotoma resulting in the following new combinations: Blepharotoma boliviana (Moser), Blepharotoma corumbana (Moser), Blepharotoma cuyabana (Moser), Blepharotoma heynei (Moser), and Blepharotoma schencklingi (Moser). The genus Blepharotoma is transferred from the tribe Liparetrini to the tribe Sericoidini. The genus Aplodema and the junior synonym Haplodema Harold are transferred from the tribe Liparetrini to the tribe Sericoidini and synonymized with the genus Sericoides GuĂ©rin-MĂ©neville. Sericoides magellanica (Blanchard) (new combination) is transferred from the genus Aplodema and placed as a senior synonym of Apterodema acuticollis Fairmaire (new synonymy). Ampliodactylus (new genus) is described for two southern South American species: Ampliodactylus marmoratus (Curtis) (new combination) and Ampliodactylus vestitus (Philippi) (new combination). The genus Chremastodus Solier is placed in synonymy with the genus Macrodactylus Dejean (Macrodactylini) and Chremastodus pubescens Solier is placed as a junior synonym of Macrodactylus chilensis Solier (new synonymy). Macrodactylus crassipes Philippi and Macrodactylus nigrinus Philippi are placed as junior synonyms of Macrodactylus farinosus Philippi (new synonymies). The genus Astaenosiagum MartĂnez is placed in synonymy with the genus Pristerophora Harold (Macrodactylini). Pristerophora longipes (Philippi) (new combination) is transferred from the genus Astaenosiagum and Schizochelus ursulus Philippi is placed as a junior synonym of this species (new synonymy). Pristerophora paulseni (new species) is described. Pristerophora picipennis (Solier) is placed as a senior synonym of Schizochelus breviventris Philippi (new synonymy) and Schizochelus serratus Philippi (new synonymy). Pusiodactylus (new genus) is described for two southern South American species: Pusiodactylus mondacai (new species) and Pusiodactylus flavipennis (Philippi) (new combination). The genus Paulosawaya MartĂnez and D'Andretta is placed in synonymy with the genus Clavipalpus Laporte (Macrodactylini) resulting in the new combination Clavipalpus ornatissima (MartĂnez and D'Andretta). The following replacement names are proposed for three junior secondary homonyms the genus Plectris LePeletier and Serville: Plectris evansi (new name) for Plectris cinerascens Moser (junior secondary homonym of Plectris cinerascens (Blanchard)), Plectris katovichi (new name) for Plectris bonariensis Frey (junior secondary homonym of Plectris bonariensis (Bruch)), and Plectris tacoma (new name) for Plectris comata (Blanchard) (junior secondary homonym of Plectris comata (Blanchard))
An investigation of the temperature dependence of the ultrasonic properties of AS4/lexan and XAS/lexan composites
An investigation of the temperature dependence of the ultrasonic properties of AS4/lexan and XAS/lexan composites is summarized. In particular, a technique for determination of velocity and attenuation as a function of temperature, for both the matrix and composite materials is determined. The separation of contributions of the matrix and fiber to ultrasonic propagation and scattering is discussed. Work begun on the characterization of wave propagation in graphite fiber/polymer matrix composites is described
Database support of detector operation and data analysis in the DEAP-3600 Dark Matter experiment
The DEAP-3600 detector searches for dark matter interactions on a 3.3 tonne
liquid argon target. Over nearly a decade, from start of detector construction
through the end of the data analysis phase, well over 200 scientists will have
contributed to the project. The DEAP-3600 detector will amass in excess of 900
TB of data representing more than 10 particle interactions, a few of
which could be from dark matter. At the same time, metadata exceeding 80 GB
will be generated. This metadata is crucial for organizing and interpreting the
dark matter search data and contains both structured and unstructured
information.
The scale of the data collected, the important role of metadata in
interpreting it, the number of people involved, and the long lifetime of the
project necessitate an industrialized approach to metadata management.
We describe how the CouchDB and the PostgreSQL database systems were
integrated into the DEAP detector operation and analysis workflows. This
integration provides unified, distributed access to both structured
(PostgreSQL) and unstructured (CouchDB) metadata at runtime of the data
analysis software. It also supports operational and reporting requirements
Drawing Boundaries
In âOn Drawing Lines on a Mapâ (1995), I suggested that the different ways we have of drawing lines on maps open up a new perspective on ontology, resting on a distinction between two sorts of boundaries: fiat and bona fide. âFiatâ means, roughly: human-demarcation-induced. âBona fideâ means, again roughly: a boundary constituted by some real physical discontinuity. I presented a general typology of boundaries based on this opposition and showed how it generates a corresponding typology of the different sorts of objects which boundaries determine or demarcate. In this paper, I describe how the theory of fiat boundaries has evolved since 1995, how it has been applied in areas such as property law and political geography, and how it is being used in contemporary work in formal and applied ontology, especially within the framework of Basic Formal Ontology
Sound separation probe
Probe separates sound waves from turbulent flow pressure fluctuations in ducted airstreams by using principle that sound waves and turbulent flow pressure perturbations travel at different velocities
Economical technique for fragmentation testing
Automatic rifle was modified for remote, single-shot use. To simulate statistically--determined fragment size from rocket-motor casing blunt-nosed bullet was made of same alloy. Cartridge was loaded with enough powder to make bullet reach target at same estimated velocity as shrapnel from rocket casing
The Optical Polarization Properties of X-ray Selected BL Lacertae Objects
We discuss the optical polarization properties of X-ray selected BL Lacertae
objects (XSBLs) as determined from three years of monitoring 37 BL Lac objects
and candidates. The observed objects include a complete X-ray flux limited
sample drawn from the EMS Survey. The majority of the XSBLs classi- fied solely
on the appearance of their spectra are members of the class of BL~Lacs since
they possess intrinsically polarized and variable continua. The duty cycle of
polarized emission from XSBLs is 40\%. The majority of XSBLs (\%)
have preferred polarization position angles on time scales as long as three
years. This reflects stability in the geometry of the region emitting the
polarized optical emission. We discuss the observed spectral dependence of the
degree of polarization and some of the possible mechanisms for producing the
observed characteristics. While dilution of the polarized emission by the host
galaxy starlight is present in some objects, we demon- strate that the average
polarization properties derived from our observations are not drastically
affected by this effect. The objects in our monitored sample did not display
the larger than one magnitude variations generally used to characterize the
optical variability of blazars in general.Comment: LaTex file, 21 pages, with tables appended as a poscript file.
Contact [email protected] for postscript figure files. Institute for Advanced
Study number AST 93/4
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