4,792 research outputs found
The AstroSat observation of accreting millisecond X-ray pulsar SAX J1808.4-3658 during its 2019 outburst
Full text linkWe report on the analysis of the AstroSat dataset of the accreting
millisecond X-ray pulsar SAX J1808.4-3658, obtained during its 2019 outburst.
We found coherent pulsations at Hz and an orbital solution
consistent with previous studies. The 3-20 keV pulse profile can be well fitted
with three harmonically related sinusoidal components with background-corrected
fractional amplitude of , and for
fundamental, second and third harmonic, respectively. Our energy-resolved pulse
profile evolution study indicate a strong energy dependence. We also observed a
soft lag in fundamental and hard lag during its harmonic. The broadband
spectrum of SAX J1808.4-3658 can be well described with a combination of
thermal emission component with keV, a thermal Comptonization
() from the hot corona and broad emission lines due to Fe.Comment: Accepted for publication in MNRA
The AstroSat observation of accreting millisecond X-ray pulsar SAX J1808.4-3658 during its 2019 outburst
No full textWe report on the analysis of the AstroSat dataset of the accreting millisecond X-ray pulsar SAX J1808.4-3658, obtained during its 2019 outburst. We found coherent pulsations at Hz and an orbital solution consistent with previous studies. The 3-20 keV pulse profile can be well fitted with three harmonically related sinusoidal components with background-corrected fractional amplitude of , and for fundamental, second and third harmonic, respectively. Our energy-resolved pulse profile evolution study indicate a strong energy dependence. We also observed a soft lag in fundamental and hard lag during its harmonic. The broadband spectrum of SAX J1808.4-3658 can be well described with a combination of thermal emission component with keV, a thermal Comptonization () from the hot corona and broad emission lines due to Fe
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No full textJyotsna Behl, Prinka Mishra NK Verma, SK Niranjan, PS Dangi, Rekha Sharma, Rahul Behl (2016) Nucleotide Polymorphisms in the bovine lymphotoxin A gene and their distribution among Bos indicus zebu cattle breeds. Gene, 579 : 82 - 94.Not AvailableNot Availabl
Structural Pattern Matching - Succinctly
Full text linkLet T be a text of length n containing characters from an alphabet \Sigma, which is the union of two disjoint sets: \Sigma_s containing static characters (s-characters) and \Sigma_p containing parameterized characters (p-characters).
Each character in \Sigma_p has an associated complementary character from \Sigma_p.
A pattern P (also over \Sigma) matches an equal-length substring of T iff the s-characters match exactly, there exists a one-to-one function that renames the p-characters in S to the p-characters in P, and if a p-character x is renamed to another p-character y then the complement of x is renamed to the complement of y.
The task is to find the starting positions (occurrences) of all such substrings S.
Previous indexing solution [Shibuya, SWAT 2000], known as Structural Suffix Tree, requires \Theta(n\log n) bits of space, and can find all occ occurrences in time O(|P|\log \sigma+ occ), where \sigma = |\Sigma|.
In this paper, we present the first succinct index for this problem, which occupies n \log \sigma + O(n) bits and offers O(|P|\log\sigma+ occ\cdot \log n \log\sigma) query time
Fully Functional Parameterized Suffix Trees in Compact Space
Full text linkTwo equal length strings are a parameterized match (p-match) iff there exists a one-to-one function that renames the symbols in one string to those in the other. The Parameterized Suffix Tree (PST) [Baker, STOC' 93] is a fundamental data structure that handles various string matching problems under this setting. The PST of a text T[1,n] over an alphabet Σ of size σ takes O(nlog n) bits of space. It can report any entry in (parameterized) (i) suffix array, (ii) inverse suffix array, and (iii) longest common prefix (LCP) array in O(1) time. Given any pattern P as a query, a position i in T is an occurrence iff T[i,i+|P|-1] and P are a p-match. The PST can count the number of occurrences of P in T in time O(|P|log σ) and then report each occurrence in time proportional to that of accessing a suffix array entry. An important question is, can we obtain a compressed version of PST that takes space close to the text’s size of nlogσ bits and still support all three functionalities mentioned earlier? In SODA' 17, Ganguly et al. answered this question partially by presenting an O(nlogσ) bit index that can support (parameterized) suffix array and inverse suffix array operations in O(log n) time. However, the compression of the (parameterized) LCP array and the possibility of faster suffix array and inverse suffix array queries in compact space were left open. In this work, we obtain a compact representation of the (parameterized) LCP array. With this result, in conjunction with three new (parameterized) suffix array representations, we obtain the first set of PST representations in o(nlog n) bits (when logσ = o(log n)) as follows. Here ε > 0 is an arbitrarily small constant.
- Space O(n logσ) bits and query time O(log_σ^ε n);
- Space O(n logσlog log_σ n) bits and query time O(log log_σ n); and
- Space O(n logσ log^ε_σ n) bits and query time O(1).
The first trade-off is an improvement over Ganguly et al.’s result, whereas our third trade-off matches the optimal time performance of Baker’s PST while squeezing the space by a factor roughly log_σ n. We highlight that our trade-offs match the space-and-time bounds of the best-known compressed text indexes for exact pattern matching and further improvement is highly unlikely
Sonia the mother of Rahul Gandhi the prime minister in the making
No full textPress coverage on Rahul Gandhi, b. 1970, a politician from India; extracted from various sources
Insights from a pseudospectral study of a potentially singular solution of the three-dimensional axisymmetric incompressible Euler equation
Full text linkWe develop a Fourier-Chebyshev pseudospectral direct numerical simulation
(DNS) to examine a potentially singular solution of the radially bounded,
three-dimensional (3D), axisymmetric Euler equations [G. Luo and T.Y. Hou,
Proc. Natl. Acad. Sci. USA, 111.36 (2014)]. We demonstrate that: (a) the time
of singularity is preceded, in any spectrally truncated DNS, by the formation
of oscillatory structures called tygers, first investigated in the
one-dimensional (1D) Burgers and two-dimensional (2D) Euler equations; (b) the
analyticity-strip method can be generalized to obtain an estimate for the
(potential) singularity time.Comment: 17 pages. 13 figure
sj-docx-2-pie-10.1177_09544089221110983 - Supplemental material for Experimental analysis of latent heat thermal energy storage system using encapsulated multiple phase-change materials
No full textSupplemental material, sj-docx-2-pie-10.1177_09544089221110983 for Experimental analysis of latent heat thermal energy storage system using encapsulated multiple phase-change materials by Santosh Kumar Singh, Sujit Kumar Verma, Rahul Kumar, Abhishek Sharma, Ramanpreet Singh and Nishant Tiwari in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
sj-docx-1-pie-10.1177_09544089221110983 - Supplemental material for Experimental analysis of latent heat thermal energy storage system using encapsulated multiple phase-change materials
No full textSupplemental material, sj-docx-1-pie-10.1177_09544089221110983 for Experimental analysis of latent heat thermal energy storage system using encapsulated multiple phase-change materials by Santosh Kumar Singh, Sujit Kumar Verma, Rahul Kumar, Abhishek Sharma, Ramanpreet Singh and Nishant Tiwari in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
Recurrent Aphthous Ulcers (RAS) and Its Prevalence among People of Punjab
Full text linkOBJECTIVE: At times neglected, an oral ulcer is usually benign in nature and resolves spontaneously, howevers, a small proportions of it are malignant in nature.AIM: To determine the prevalence of recurrent aphthous ulcers (RAS) screened in different locations in the Indian state of Punjab.Material and Methods: over a period of three months, a total of 2245 patients were screened among various camps organized around various states of Punjab using an ADA Type IV examination with recording a detailed family and medical history. Data was analysied using SPPS version 19.0.RESULTS: 779 patients presented with recurrent aphthous ulceration (34.7%). Females (413, 53.1%) were more commonly affected than males (366, 46.9%) with those being affected in the Patients in the third and fourth decade of their life and this difference was statistically significant. The most factor associated was stress stomatitis seen in 453 patients (58.2%). Food consumed was the second common factor related with the condition (121 patients, 15.5%), closely followed by nutritional deficiency (113 patients, 14.5%). There were no significant difference seen between any of the factors and the occurrence of RAS in the patients.CONCLUSION: It was revealed that recurrent aphthous ulceration is a common mucosal disorder in the people of Punjab. Early, proper and prompt diagnosis of the ulcers will help the dental practitioner in providing information to the patient, educate the patient regarding this condition and regarding and management of the condition
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