7,512 research outputs found
Some evidence for high energy gamma-ray sources at large galactic latitudes
The arrival directions of the gamma-quanta with energies of about 10 to 15th power eV which were registrated by Tien Shan experiment were compared with COS-B observations. On the basis of the Monte Carlo simulations it was shown with low probability that arrival directions of Tien Shan gamma-quanta initiated showers are not uniformly distributed. It is shown that in the region not seen by COS-B mission, the high energy gamma-ray sources should be located at position of 90 deg. 1 sup 11 130 deg and b sup 11 or = 50 deg. The integral intensity of these sources should be I ( 10 to the 15th power eV) = 4.8 + or - 1.7).10 to the 13th power/sq cm/s/str. There is no coincidence between the gamma-quanta registrated by Tien Shan experiment with Geminga intense COS-B gamma source. So it is shown that the integral photon spectrum of Geminga (I(e) approx E sup-Beta, where Beta = 0.8 for E 1 GeV) becomes steeper (Beta 1.2) in high energy region with probability 99.9.%
Evaluation of mechanical and physicochemical properties of protection coatings obtained by sol-gel method
Thin coatings, obtained by the sol-gel method, could find potential applications in medical, chemical and food industry. To achieve this, coatings need to have proper physicochemical, mechanical and protective properties. Titanium dioxide (TiOβ) and silicon dioxide (SiOβ) coatings have been applied onto the surface of a stainless steel (316L) by the solgel method using two techniques: dip-coating and painting. To determine the physicochemical composition of triple SiOβ and TiOβ coatings, samples were examined by Raman spectroscopy. Surface images obtained with the use of a scanning electron microscopy allow us to determine the surface morphology and continuity of the coatings. The surface morphology was examined before and after tensile tests. The static tensile tests and fatigue strength tests were conducted on a hydraulic testing machine MTS 810 with a measuring range of up to 100 kN. A preliminary research has confirmed that the coatings obtained by the sol-gel method have physicochemical, mechanical and protective properties that make it possible to use them as protective coatings.Π’ΠΎΠ½ΠΊΡ ΠΏΠΎΠΊΡΠΈΠ²ΠΈ Π½Π° ΠΎΡΠ½ΠΎΠ²Ρ SiOβ ΡΠ° TiOβ, ΠΎΡΡΠΈΠΌΠ°Π½Ρ Π·ΠΎΠ»Ρ-Π³Π΅Π»Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ, Π·Π°ΡΡΠΎΡΠΎΠ²ΡΡΡΡ Ρ ΠΌΠ΅Π΄ΠΈΡΠΈΠ½Ρ, Ρ
ΡΠΌΡΡΠ½ΡΠΉ ΡΠ° Ρ
Π°ΡΡΠΎΠ²ΡΠΉ ΠΏΡΠΎΠΌΠΈΡΠ»ΠΎΠ²ΠΎΡΡΡ. ΠΠ»Ρ Π΄ΠΎΡΡΠ³Π½Π΅Π½Π½Ρ Π½Π΅ΠΎΠ±Ρ
ΡΠ΄Π½ΠΈΡ
ΡΡ
ΡΡΠ·ΠΈΠΊΠΎ-Ρ
ΡΠΌΡΡΠ½ΠΈΡ
, ΠΌΠ΅Ρ
Π°Π½ΡΡΠ½ΠΈΡ
Ρ Π·Π°Ρ
ΠΈΡΠ½ΠΈΡ
Π²Π»Π°ΡΡΠΈΠ²ΠΎΡΡΠ΅ΠΉ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½ΠΎ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½Ρ ΡΠ΅ΠΆΠΈΠΌΠΈ Π·ΠΎΠ»Ρ-Π³Π΅Π»Ρ ΠΌΠ΅ΡΠΎΠ΄Ρ, ΡΠΎΠ± ΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈ ΠΏΠΎΠΊΡΠΈΠ²ΠΈ Π½Π° ΠΎΡΠ½ΠΎΠ²Ρ Π΄ΠΈΠΎΠΊΡΠΈΠ΄ΡΠ² ΡΠΈΡΠ°Π½Ρ ΡΠ° ΠΊΡΠ΅ΠΌΠ½ΡΡ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ Π½Π΅ΡΠΆΠ°Π²Π½ΠΎΡ ΡΡΠ°Π»Ρ ΡΠΈΠΏΡ 316L. ΠΠ»Ρ ΠΎΡΡΠ½ΠΊΠΈ Π²Π»Π°ΡΡΠΈΠ²ΠΎΡΡΠ΅ΠΉ ΠΏΠΎΠΊΡΠΈΠ²ΡΠ² Π²ΠΆΠΈΡΠΎ ΠΌΠ΅ΡΠΎΠ΄ΠΈ ΡΠ°ΠΌΠ°Π½ΡΠ²ΡΡΠΊΠΎΡ ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΡΡ, Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½ΠΎ Π·Π° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ ΡΠΊΠ°Π½ΡΠ²Π½ΠΎΠ³ΠΎ Π΅Π»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΌΡΠΊΡΠΎΡΠΊΠΎΠΏΠ°. ΠΠΎΡΡΠΎΠ»ΠΎΠ³ΡΡ ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ Π²ΠΈΠ²ΡΠ°Π»ΠΈ Π΄ΠΎ ΡΠ° ΠΏΡΡΠ»Ρ Π²ΠΈΠΏΡΠΎΠ±ΡΠ²Π°Π½Ρ Π½Π° ΡΠΎΠ·ΡΡΠ³ Π½Π° Π³ΡΠ΄ΡΠ°Π²Π»ΡΡΠ½ΡΠΉ ΠΌΠ°ΡΠΈΠ½Ρ MTS 810 Π· Π½Π°Π²Π°Π½ΡΠ°ΠΆΠ΅Π½Π½ΡΠΌΠΈ Π΄ΠΎ 100 kN. ΠΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΠΎ ΠΏΠΎΠΊΡΠΈΠ²ΠΈ Π²ΠΎΠ»ΠΎΠ΄ΡΡΡΡ Π½Π΅ΠΎΠ±Ρ
ΡΠ΄Π½ΠΈΠΌΠΈ ΡΡΠ·ΠΈΠΊΠΎ-Ρ
ΡΠΌΡΡΠ½ΠΈΠΌΠΈ ΡΠ° ΠΌΠ΅Ρ
Π°Π½ΡΡΠ½ΠΈΠΌΠΈ Π²Π»Π°ΡΡΠΈΠ²ΠΎΡΡΡΠΌΠΈ, ΡΠΎΠ± ΡΡ
Π·Π°ΡΡΠΎΡΠΎΠ²ΡΠ²Π°ΡΠΈ ΡΠΊ Π·Π°Ρ
ΠΈΡΠ½Ρ.Π’ΠΎΠ½ΠΊΠΈΠ΅ ΠΏΠΎΠΊΡΡΡΠΈΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ SiOβ ΠΈ TiOβ, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ Π·ΠΎΠ»Ρ-Π³Π΅Π»Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ, ΠΏΡΠΈΠΌΠ΅Π½ΡΡΡ Π² ΠΌΠ΅Π΄ΠΈΡΠΈΠ½Π΅, Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈ ΠΏΠΈΡΠ΅Π²ΠΎΠΉ ΠΏΡΠΎΠΌΡΡΠ»Π΅Π½Π½ΠΎΡΡΠΈ. ΠΠ»Ρ Π΄ΠΎΡΡΠΈΠΆΠ΅Π½ΠΈΡ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡΡ
ΠΈΡ
ΡΠΈΠ·ΠΈΠΊΠΎ-Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
, ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ Π·Π°ΡΠΈΡΠ½ΡΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ ΡΠ΅ΠΆΠΈΠΌΡ Π·ΠΎΠ»Ρ-Π³Π΅Π»Ρ ΠΌΠ΅ΡΠΎΠ΄Π° Π΄Π»Ρ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎΠΊΡΡΡΠΈΠΉ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄ΠΈΠΎΠΊΡΠΈΠ΄ΠΎΠ² ΡΠΈΡΠ°Π½Π° ΠΈ ΠΊΡΠ΅ΠΌΠ½ΠΈΡ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ Π½Π΅ΡΠΆΠ°Π²Π΅ΡΡΠ΅ΠΉ ΡΡΠ°Π»ΠΈ ΡΠΈΠΏΠ° 316L. ΠΠ»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ ΡΠ²ΠΎΠΉΡΡΠ² ΠΏΠΎΠΊΡΡΡΠΈΠΉ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ ΠΌΠ΅ΡΠΎΠ΄Ρ ΡΠ°ΠΌΠ°Π½ΠΎΠ²ΡΠΊΠΎΠΉ ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΠΈ, Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π° Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΡΠΊΠ°Π½ΠΈΡΡΡΡΠ΅Π³ΠΎ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠ°. ΠΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΡ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΈΠ·ΡΡΠ°Π»ΠΈ Π΄ΠΎ ΠΈ ΠΏΠΎΡΠ»Π΅ ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ Π½Π° ΡΠ°ΡΡΡΠΆΠ΅Π½ΠΈΠ΅ Π½Π° Π³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠ°ΡΠΈΠ½Π΅ MTS 810 Ρ Π½Π°Π³ΡΡΠ·ΠΊΠ°ΠΌΠΈ Π΄ΠΎ 100 kN. ΠΡΡΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ Π²Π»Π°Π΄Π΅ΡΡ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡΠΌΠΈ ΡΠΈΠ·ΠΈΠΊΠΎ-Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΈ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌΠΈ, ΡΡΠΎΠ±Ρ ΠΈΡ
ΠΏΡΠΈΠΌΠ΅Π½ΡΡΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π·Π°ΡΠΈΡΠ½ΡΡ
Local texture and percolative paths for long-range conduction in high critical current density TlBaβCaβCuβOβββ deposits
Β©1994 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?APPLAB/64/106/1DOI:10.1063/1.110908A possible microstructural origin of the high critical current densities which have been obtained in c-axis-aligned, polycrystalline TlBaβCaβCuβOβββdeposits has been identified. The results of x-ray diffraction determinations of basal plane texture of Tl-1223 deposits prepared by spray pyrolysis are observed to depend on the size of the x-ray beam. Furthermore, most grain boundaries were found from transmission electron microscopy to have small misorientation angles. It is concluded that although overall the basal plane orientations are nearly random, there is a high degree of local texture indicative of colonies of similarly oriented grains. The spread in a-axis orientation within a colony is ~10Β°β15Β°. Intercolony conduction, it is suggested, may be enhanced by a percolative network of small-angle grain boundaries at colony interfaces
Introduction: Language, Sound, and the Humanities
Presenting the joint historical and methodological framework of the theme issue βSounds of LanguageβLanguages of Sound,β this introduction situates the individual contributions within a broader history of the humanities. The eight contributions address the period between approximately 1890 and 1970βfrom the modern disciplinary formation of knowledge about sound and the rise of the social sciences and humanities to the beginnings of computerized sound research. During this period, disciplines as diverse as linguistics, musicology, history, sociology, law, and theology all aspired to give scholarly attention to sound, and in particular to the spoken word. Starting from the observation that late nineteenth-century scholars of language turned from expert readers of historical texts into expert listeners to living languages, we trace the dual use of language as an object and a tool of knowledge production. As a research theme, language often broke through frontiers between the humanities, the social sciences, and the natural sciences, as well as between academic and nonacademic domains of knowledge. At the same time, new languages and modes of speaking arose as tools to examine, represent, and utilize sonic phenomenaβwhether in speech, music, or other sonic environments. The theme issueβs three claims are, first, that sound both enabled and necessitated new alliances between otherwise divergent fields of knowledge; second, that sound and language motivated humanities scholars to reconsider or even reinvent their methodologies; and, third, that research on sound and language was deeply permeated by issues of power and politics
Monitoring the CMS strip tracker readout system
The CMS Silicon Strip Tracker at the LHC comprises a sensitive area of approximately 200 m2 and 10 million readout channels. Its data acquisition system is based around a custom analogue front-end chip. Both the control and the readout of the front-end electronics are performed by off-detector VME boards in the counting room, which digitise the raw event data and perform zero-suppression and formatting. The data acquisition system uses the CMS online software framework to configure, control and monitor the hardware components and steer the data acquisition. The first data analysis is performed online within the official CMS reconstruction framework, which provides many services, such as distributed analysis, access to geometry and conditions data, and a Data Quality Monitoring tool based on the online physics reconstruction. The data acquisition monitoring of the Strip Tracker uses both the data acquisition and the reconstruction software frameworks in order to provide real-time feedback to shifters on the operational state of the detector, archiving for later analysis and possibly trigger automatic recovery actions in case of errors. Here we review the proposed architecture of the monitoring system and we describe its software components, which are already in place, the various monitoring streams available, and our experiences of operating and monitoring a large-scale system
Data acquisition software for the CMS strip tracker
The CMS silicon strip tracker, providing a sensitive area of approximately 200 m2 and comprising 10 million readout channels, has recently been completed at the tracker integration facility at CERN. The strip tracker community is currently working to develop and integrate the online and offline software frameworks, known as XDAQ and CMSSW respectively, for the purposes of data acquisition and detector commissioning and monitoring. Recent developments have seen the integration of many new services and tools within the online data acquisition system, such as event building, online distributed analysis, an online monitoring framework, and data storage management. We review the various software components that comprise the strip tracker data acquisition system, the software architectures used for stand-alone and global data-taking modes. Our experiences in commissioning and operating one of the largest ever silicon micro-strip tracking systems are also reviewed
Clustering Attitudes and Behaviors of High/Low Involvement Grocery Shopper
The purpose of this exploratory and quantitative study was to examine the attitudes and behaviors of 14,807 grocery shop- pers. These respondents across the US were asked to answer attitudinal, behavioral, and demographic related questions. Shoppers were profiled by analyzing their responses to 16 relevant attitudinal and behavioral questions. A cluster analysis was performed followed by a discriminant analysis to deter- mine attitudinal and behavioral variables explaining cluster membership. A cross-tabulation analysis assessed demo- graphic variables that correlated with cluster membership. Two clusters were identified: high and low involvement grocery shoppers. In an event that has long been perceived as low involvement, a large percentage (53%) can be categorized as high involvement grocery shoppers. These shoppers tend to be younger. They were more likely to enjoy the hunt of finding products/deals, seek the advice of others and perceive that the products they buy reflect upon them. Grocery stores have a significant opportunity to target this high involvement shop- per. Grocery stores will need to create an integrative, engaging online and in-store experience to attract high involvement shoppers and ultimately increase store loyalty. The results of this research has significant communication, branding and digital marketing implications
Photoinduced electrooptics in the In2O3 nanocrystals incorporated into PMMA matrixes
We have observed an appearance of clear morphological structure in composites containing In2O3 nanocrystals (NCs) incorporated into polymethyl methacrylite (PMMA) matrices under optical treatment by a polarized femtosecond laser. The initial photoinduced treatment was carried out using a Ti:sapphire femtosecond laser emitting 140Β fs p-polarized light at a maximum spectral wavelength 775Β nm with pulse repetition 1Β kHz. It was found that the average morphological radius is varied maximally only during illumination at liquid helium temperature (T = 4.2Β K). The morphological average mean radius is strictly dependent on the sizes of incorporated In2O3 NCs. Afterwards we measured the linear electrooptic effect at cw HeβNe laser wavelength 633Β nm during simultaneous treatment by 1060 and 530Β nm coherent beams of a NdβYAG picosecond laser. We have established that a decrease of the average morphological mean radius favours an increase of the optically poled linear electrooptic coefficient. The diameters of In2O3 NCs were evaluated using transmission electron microscopy (TEM) and light-scattering techniques, whereas the NC sizes and morphological average mean radius of formed nanocomposites were estimated by atomic force microscopy (AFM). A relationship between the diameter of the NC, composite morphological mean average radius and effective linear electrooptic coefficient was established.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/58122/2/cm7_1_016204.pd
Search for charged Higgs decays of the top quark using hadronic tau decays
We present the result of a search for charged Higgs decays of the top quark,
produced in collisions at 1.8 TeV. When the charged
Higgs is heavy and decays to a tau lepton, which subsequently decays
hadronically, the resulting events have a unique signature: large missing
transverse energy and the low-charged-multiplicity tau. Data collected in the
period 1992-1993 at the Collider Detector at Fermilab, corresponding to
18.70.7~pb, exclude new regions of combined top quark and charged
Higgs mass, in extensions to the standard model with two Higgs doublets.Comment: uuencoded, gzipped tar file of LaTeX and 6 Postscript figures; 11 pp;
submitted to Phys. Rev.
- β¦