The population of the Northern red-backed vole ( Myodes rutilus ) from the vicinity of Novosibirsk is polymorphic for coat coloration. Some of its individuals possess an unusual black color of rump. Experimental studies have shown that mature males with the aberrant coloration outperform standard males in such adaptive characteristics as body mass and exploratory activity, rank higher in social hierarchy, have an optimal balance between amicability and aggressiveness, and are more attractive for receptive females. All these features give the aberrant males an advantage at high population density and intensity of social competition as early as the beginning of the mating season. As a result, they produce more offspring, and the proportion of the aberrant individuals increases. However, the early-born aberrant progeny also early matures and starts its reproduction, thus, it is eliminated in the autumn. In a sparser population, the aforementioned advantages are less significant, and the proportion of the aberrant form remains unchanged by the end of the reproductive season. Thus, the ethological mechanisms determining male competitive capacity and female mating preferences contribute in the maintenance of the dynamic coat-color polymorphism in the Northern red-backed vole population.

Coat

Rump

Vole

Adaptive value

Rutilus

Source

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Citations (0)

[Chromosomal evolution of the Common Shrew Sorex araneus L.from the Southern Ural and Siberia in the postglacial period].

Russian Journal of Genetics (2001)

Andrey Polyakov V. V. Panov Tatiana Ladygina M. N. Bochkarev M. I. Rodionova

Araneus

Shrew

Sorex

10.1023/a:1016690023394

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Citations (45)

AFLP diversity between the Novosibirsk and Tomsk chromosome races of the common shrew (Sorex araneus)

Comparative Cytogenetics (2009)

Andrey Polyakov V. B. Ilyashenko S. S. Onischenko V. V. Panov Pavel M. Borodin

Genetic diversity between of the Novosibirsk and Tomsk chromosome races of the common shrew (Sorex araneus) was analyzed using 39 polymorphic AFLP (amplified fragments length polymorphism) markers. Exact and F-statistics tests for population differentiation demonstrated significant interracial difference in allele frequencies and significant subdivision between the races. The value of the genetic distance between the chromosome races observed in this study corresponds to that found between subspecies of mammals studied so far.

Sorex

Araneus

Subspecies

Shrew

10.3897/compcytogen.v3i2.14

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Citations (8)

Fine synchronization of the CMS muon drift-tube local trigger using cosmic rays

Journal of Instrumentation (2010)

S. Chatrchyan V. Khachatryan A. M. Sirunyan W. Adam B. Arnold

The CMS experiment uses self-triggering arrays of drift tubes in the barrel muon trigger to perform the identification of the correct bunch crossing. The identification is unique only if the trigger chain is correctly synchronized. In this paper, the synchronization performed during an extended cosmic ray run is described and the results are reported. The random arrival time of cosmic ray muons allowed several synchronization aspects to be studied and a simple method for the fine synchronization of the Drift Tube Local Trigger at LHC to be developed.

Drift tube

Identification

Compact Muon Solenoid

10.1088/1748-0221/5/03/t03004

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Citations (32)

Dynamical adjustment of crystal reflectivity by large-amplitude ultrasonic excitation for synchrotron X-ray monochromatization

Journal of Applied Crystallography (1994)

Igor Polikarpov V. V. Panov H.D. Bartunik

A new technique of double-crystal X-ray monochromatization is described that provides a higher flux at a given bandwidth than conventional perfect-double-crystal-monochromator systems and, furthermore, permits dynamical adjustment of the energy resolution. The new technique is based on the excitation of perfect crystals by ultrasonic waves (USWs), which induces a continuous increase in reflectivity with increasing USW amplitude. Theoretical expressions in analytical form have been derived for both the differential and integrated reflection coefficients of USW-excited crystals for large amplitudes of vibration. For Si(440), the perfect-crystal reflection width of 3 × 10−6 rad may be broadened to a width of more than 10−4 rad by USW excitation. First experimental studies of the dependence of the overall reflectivity of an X-ray double-crystal monochromator system on the amplitude of USW excitation prove the feasibility of the new technique. Potential applications include optimization of flux and bandwidth in resonant absorption, scattering or diffraction studies using synchrotron radiation.

Monochromator

Crystal (programming language)

Reflection

10.1107/s0021889893008696

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Citations (11)

Determination of ultrasound velocity and attenuation in single crystals by means of x-ray diffraction

Review of Scientific Instruments (1993)

E. Zolotoyabko V. V. Panov D. Schvarkov

A new method of determination of ultrasound velocity and attenuation in single crystals by means of dynamic x-ray diffraction is substantiated theoretically and experimentally. The diffractional response in a crystal undergoing stationary or pulsed acoustic excitation is considered. The frequency dependence of the diffraction intensity yields information on ultrasound velocity. Time scanning of the diffraction response under pulsed excitation allows one to determine the attenuation coefficient. Enhancement of the ultrasound-induced x-ray diffraction contrast is achieved for high-frequency acoustic waves, when x-ray extinction length exceeds the ultrasonic wavelength. The sensitivity and accuracy limitations of the method due to diffraction spreading of the acoustic beam, to the finite thickness of the sample and its inhomogeneity, and to lateral dissipation of the acoustic energy are evaluated. The pertinent experimental data were obtained for silicon and quartz single crystals. The advantages of the proposed method versus the conventional acoustic technique are analyzed.

Acoustic attenuation

Diffraction topography

10.1063/1.1144079

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Citations (7)

CMS data processing workflows during an extended cosmic ray run

Journal of Instrumentation (2010)

S. Chatrchyan V. Khachatryan A. M. Sirunyan W. Adam B. Arnold

The CMS Collaboration conducted a month-long data taking exercise, the Cosmic Run At Four Tesla, during October-November 2008, with the goal of commissioning the experiment for extended operation. With all installed detector systems participating, CMS recorded 270 million cosmic ray events with the solenoid at a magnetic field strength of 3.8 T. This paper describes the data flow from the detector through the various online and offline computing systems, as well as the workflows used for recording the data, for aligning and calibrating the detector, and for analysis of the data.

Data Processing

Compact Muon Solenoid

Solenoid

10.1088/1748-0221/5/03/t03006

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Citations (38)

Spatial and typological inhomogeneity of small mammal communities in plains and mountains of West Siberia

Contemporary Problems of Ecology (2009)

Yu. S. Ravkin И. Н. Богомолова С. М. Цыбулин V. V. Panov С. С. Онищенко

Mammal

10.1134/s1995425509030187

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