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Author |
ZalianCyrus, ChadidMerieme, |
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Title |
Antarctica photometric survey using PDM13
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Conference - International - Article with Reading Comitee |
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Year |
2013 |
Publication |
Proceedings of the International Astronomical Union |
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Volume |
9 |
Issue |
Symposium S301 |
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511-512 |
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Keywords |
Frequency analysis, phase dispersion minimization, graphical interface, Antarctica photometric survey, |
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Abstract |
PDM13 is a new graphic interface program dedicated to frequency domain analysis based on the Phase Dispersion Minimization technique (PDM, Stellingwerf 2012). In this paper, we will present the different algorithms running in PDM13, including the Auto-Segmentation, the Gauss-Newton and the PDM algorithms. More details on this triptych are available in our recent paper (Zalian et al., submitted). Their aim is to offer a simple and powerful way to extract frequency. Amongst the numerous improvements offered by the program, we will particularly focus on the reduction of aliases and the ability to look directly for multiple-period phenomena and the Blazhko effect. After that, we will show the first results from PDM13 using the Antarctica photometric survey. |
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1096 |
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yes |
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4908 |
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Author |
Zalian C, Chadid M, Stellingwerf R F, |
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Title |
pdm13: a new graphical interfaced program for frequency analysis
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Journal Article |
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Year |
2014 |
Publication |
Monthly Notices of the Royal Astronomical Society |
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Volume |
440 |
Issue |
1 |
Pages |
68 -74 |
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Abstract |
Frequency analysis of pulsating stars can be performed via several algorithms. Still, each of these methods has its own specific flaws which advocates for the use of as many tools as possible. However, the lack of simple programs with straightforward interface impedes such a goal. PDM13 is a new software dedicated to spectral analysis based on the phase dispersion minimization technique. Its graphical environment, combined with complementary tools, such as auto-segmentation, makes it a simple and powerful mean for frequency extraction. In this paper, a detailed description of the mathematical algorithms is presented. Then, we introduce the options and interface of PDM13. Finally, we compare the results from different case study using PDM13 and other programs. |
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1096 |
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0035-8711 |
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4907 |
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Author |
M Chadid and J Vernin and G Preston and C Zalian and C Pouzenc and L Abe and A Agabi and E Aristidi and LY Liu and D, |
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Journal Article |
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Year |
2014 |
Publication |
The Astronomical Journal |
Abbreviated Journal |
Astron. J. (N. Y.) |
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Volume |
148 |
Issue |
5 |
Pages |
88- |
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We present the first detection of multi-shocks propagating through the atmosphere of the Blazhko star S Arae using uninterrupted, accurate optical photometric data collected during one polar night, 150 days from Antarctica at Dome C, with the Photometer AntarctIca eXtinction (PAIX). We acquired 89,736 CCD frames during 323 pulsation cycles and 3 Blazhko cycles. We detected two new light curve properties in the PAIX light curve, ${jump}$ and ${rump}$, which we associated with two new post-maximum shock waves ShPM1 and ShPM2. ${jump}$, lump, ${rump}$, bump, and hump are induced by five shock waves, with different amplitudes and origins, ShPM1, ShPM, ShPM2, ShPM3, and the main shock ShH + He. Correlations between the length of rise time and light amplitude and ShPM3 are monotonous during three Blazhko cycles, but the pulsation curve is double peaked. We discuss the physical mechanisms driving the modulation of these quantities. Finally, we hypothesize that the origin of the Blazhko effect is a dynamical interaction between a multi-shock structure and an outflowing wind in a coronal structure. |
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1096 |
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ISSN |
1538-3881 |
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4906 |
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Title |
The rediscovery of smallpox
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Type |
Journal Article |
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Year |
2014 |
Publication |
Clinical Microbiology and Infection |
Abbreviated Journal |
Clin. Microbiol. Infect. |
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Volume |
20 |
Issue |
3 |
Pages |
210-218 |
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Abstract |
Smallpox is an infectious disease that is unique to humans, caused by a poxvirus. It is one of the most lethal of diseases; the virus variant Variola major has a mortality rate of 30%. People surviving this disease have life-long consequences, but also assured immunity. Historically, smallpox was recognized early in human populations. This led to prevention attempts?variolation, quarantine, and the isolation of infected subjects?until Jenner?s discovery of the first steps of vaccination in the 18th century. After vaccination campaigns throughout the 19th and 20th centuries, the WHO declared the eradication of smallpox in 1980. With the development of microscopy techniques, the structural characterization of the virus began in the early 20th century. In 1990, the genomes of different smallpox viruses were determined; viruses could be classified in order to investigate their origin, diffusion, and evolution. To study the evolution and possible re-emergence of this viral pathogen, however, researchers can only use viral genomes collected during the 20th century. Cases of smallpox in ancient periods are sometimes well documented, so palaeomicrobiology and, more precisely, the study of ancient smallpox viral strains could be an exceptional opportunity. The analysis of poxvirus fragmented genomes could give new insights into the genetic evolution of the poxvirus. Recently, small fragments of the poxvirus genome were detected. With the genetic information obtained, a new phylogeny of smallpox virus was described. The interest in conducting studies on ancient strains is discussed, in order to explore the natural history of this disease. |
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1038 |
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Elsevier |
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ISSN |
1198-743X |
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yes |
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4905 |
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Title |
The ancient Yakuts: a population genetic enigma
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Type |
Journal Article |
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Year |
2014 |
Publication |
Philosophical Transactions of the Royal Society of London B: Biological Sciences |
Abbreviated Journal |
Philos. Trans. R. Soc. Lond., B, Biol. Sci. |
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Volume |
370 |
Issue |
1660 |
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This study is part of an ongoing project aiming at determining the ethnogenesis of an eastern Siberian ethnic group, the Yakuts, on the basis of archaeological excavations carried out over a period of 10 years in three regions of Yakutia: Central Yakutia, the Vilyuy River basin and the Verkhoyansk area. In this study, genetic analyses were carried out on skeletal remains from 130 individuals of unknown ancestry dated mainly from the fifteenth to the nineteenth century AD. Kinship studies were conducted using sets of commercially available autosomal and Y-chromosomal short tandem repeats (STRs) along with hypervariable region I sequences of the mitochondrial DNA. An unexpected and intriguing finding of this work was that the uniparental marker systems did not always corroborate results from autosomal DNA analyses; in some cases, false-positive relationships were observed. These discrepancies revealed that 15 autosomal STR loci are not sufficient to discriminate between first degree relatives and more distantly related individuals in our ancient Yakut sample. The Y-STR analyses led to similar conclusions, because the current Y-STR panels provided the limited resolution of the paternal lineages.
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1038 |
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0962-8436 |
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yes |
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4904 |
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Title |
Strong genetic admixture in the Altai at the Middle Bronze Age revealed by uniparental and ancestry informative markers
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Journal Article |
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Year |
2014 |
Publication |
Forensic Science International: Genetics |
Abbreviated Journal |
Forensic Sci Int Genet |
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Volume |
12 |
Issue |
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Pages |
199-207 |
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Keywords |
Ancient DNA, Admixture, Bronze Age, Altai Mountains, |
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1038 |
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1872-4973 |
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yes |
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4902 |
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Title |
Shotgun microbial profiling of fossil remains
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Journal Article |
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Year |
2014 |
Publication |
Molecular Ecology |
Abbreviated Journal |
Mol. Ecol. |
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Volume |
23 |
Issue |
7 |
Pages |
1780-1798 |
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ancient DNA, metagenomics, microbial profiling, next-generation sequencing, |
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1038 |
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1365-294X |
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yes |
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4901 |
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Title |
Tuberculosis Epidemiology and Selection in an Autochthonous Siberian Population from the 16th-19th Century
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Journal Article |
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2014 |
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PLoS ONE |
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9 |
Issue |
2 |
Pages |
e89877- |
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1038 |
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Public Library of Science |
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1932-6203 |
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4900 |
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Author |
Vignon, Etienne |
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Report |
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2014 |
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1013 |
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4898 |
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Conference - International - Communication |
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2014 |
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4897 |
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