oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Search Results: 1 - 10 of 2316 matches for " Irina Rudoy "
All listed articles are free for downloading (OA Articles)
Page 1 /2316
Display every page Item
Necessity for Vitamin D Screening among Urban Bedouin Women of Childbearing Age  [PDF]
Inna Rudoy, Ilia Volkov
Health (Health) , 2015, DOI: 10.4236/health.2015.75066
Abstract: Vitamin D (Vit D) plays multiple roles in bodily functions. Vit D deficiency is a common, but often under-diagnosed condition with possible serious complications. According to some research, Vit D is important particularly among women and children. No data were found concerning the Vit D status among urban Bedouin women of childbearing age. The research study is retrospective and descriptive. We analyzed 202 medical histories of patients undergoing blood tests for Vit D level for various reasons. The main objectives of the research were: 1) determining the prevalence of the Vit D deficiency among the Bedouin women of childbearing age; 2) identifying the causes for the physicians’ reasons for suspecting Vit D deficiency: the complaints or symptoms which cause the doctor to test for Vit D level. As a result, in 80.7% of those tested for Vit D, levels were less than 10 ng/ml, and in 19.3%, levels of 10 to 20 ng/ml were found. In lieu of our findings and in order to prevent serious health problems, Vit D screening plan should be seriously considered and discussed in the Bedouin population with high risk of deficiency.
An inductive approach to constructing Universal Cycles on the k-subsets of [n]
Yevgeniy Rudoy
Mathematics , 2012,
Abstract: In this paper, we introduce a method of constructing Universal Cycles on sets by taking "sums" and "products" of smaller cycles. We demonstrate this new approach by proving that if there exist Universal Cycles on the 4-subsets of [18] and the 4-subsets of [26], then for any integer n which is greater than or equal 18 and equivalent to 2 mod 8, there exists a Universal Cycle on the 4-subsets of [n].
Factors associated with mortality in patients with drug-susceptible pulmonary tuberculosis
Payam Nahid, Leah G Jarlsberg, Irina Rudoy, Bouke C de Jong, Alon Unger, L Masae Kawamura, Dennis H Osmond, Philip C Hopewell, Charles L Daley
BMC Infectious Diseases , 2011, DOI: 10.1186/1471-2334-11-1
Abstract: Retrospective chart review of patients with drug-susceptible tuberculosis reported to the San Francisco Tuberculosis Control Program from 1990-2001.Of 565 patients meeting eligibility criteria, 37 (6.6%) died during the study period. Of 37 deaths, 12 (32.4%) had tuberculosis listed as a contributing factor. In multivariate analysis controlling for follow-up time, four characteristics were independently associated with mortality: HIV co-infection (HR = 2.57, p = 0.02), older age at tuberculosis diagnosis (HR = 1.52 per 10 years, p = 0.001); initial sputum smear positive for acid fast bacilli (HR = 3.07, p = 0.004); and experiencing an interruption in tuberculosis therapy (HR = 3.15, p = 0.002). The association between treatment interruption and risk of death was due to non-adherence during the intensive phase of treatment (HR = 3.20, p = 0.001). The median duration of treatment interruption did not differ significantly in either intensive or continuation phases between those who died and survived (23 versus 18 days, and 37 versus 29 days, respectively). No deaths were directly attributed to adverse drug reactions.In addition to advanced age, HIV and characteristics of advanced tuberculosis, experiencing an interruption in anti-tuberculosis therapy, primarily due to non-adherence, was also independently associated with increased risk of death. Improving adherence early during treatment for tuberculosis may both improve tuberculosis outcomes as well as decrease mortality.Tuberculosis is a leading cause of death worldwide. According to the World Health Organization (WHO) over 1.7 million people with tuberculosis died in 2008 [1]. Advanced age, male gender, delays in diagnosis and treatment, drug resistance, and co-morbid conditions including HIV co-infection, diabetes, renal disease and COPD, have been associated with increased risk of death in patients with active tuberculosis [2-8]. A substantial proportion of deaths occur during tuberculosis treatment despite patient
The Bogolyubov method of quasiaverages solves the problem of pressure fluctuations in the Gibbs statistical mechanics
Yu.G. Rudoy
Condensed Matter Physics , 2009,
Abstract: The long-standing and highly non-trivial problem of calculating the pressure fluctuations in the Gibbs equilibrium statistical mechanics is fully revised. The previous attempts are critically analyzed and it is shown that the application of the ideas by Bogolyubov gives the full and unambiguous solution of this problem. The crucial role is played by the Bogolyubov's idea of quasiaverages (or rather quasidynamic) quantities - specifically, the pressure P and dynamic compressibility Ψ. The virtual conjugate field which eliminates the translational invariance of the Hamilton function H in the limit ε→ 0 is the singular potential of the impenetrable walls of the container. The general relations for P and Ψ in terms of the derivatives of H are obtained and some examples are studied - i. e., the cases of the ideal vs. non-ideal as well as of uniform vs. non- and quasi-uniform (in Euler sense) Hamilton function H describing the given system.
Application of prodigiosin as a colorant for polyolefines  [PDF]
Irina Ryazantseva, Irina Andreyeva
Advances in Biological Chemistry (ABC) , 2014, DOI: 10.4236/abc.2014.41004
Abstract: Serratia marcescens strain 9986 is a producer of prodigiosin used as a dye of polyolefines (polyethylene, ultratene). The biosynthesis of pigment was closely connected with controlled growth parameters. A prodigiosin yield 0.2 - 0.4 mg per l of culture medium in the batch culture under aerobic conditions was obtained. Prodigiosin was extracted from crude biomass treated by 0.1% of sodium dodecyl sulfate (SDS). This novel elaborated stage is necessary for thermostability a dye in polymer. The consumption of prodigiosin preparation is more economical in the technology of the coloration of polyolefines. The elaborated method has been manufactured for dyeing polyethylene by biological pigment-articles of the common use corresponding to the technological standard.
Superposition frames for adaptive time-frequency analysis and fast reconstruction
Daniel Rudoy,Prabahan Basu,Patrick J. Wolfe
Mathematics , 2009, DOI: 10.1109/TSP.2010.2041604
Abstract: In this article we introduce a broad family of adaptive, linear time-frequency representations termed superposition frames, and show that they admit desirable fast overlap-add reconstruction properties akin to standard short-time Fourier techniques. This approach stands in contrast to many adaptive time-frequency representations in the extant literature, which, while more flexible than standard fixed-resolution approaches, typically fail to provide efficient reconstruction and often lack the regular structure necessary for precise frame-theoretic analysis. Our main technical contributions come through the development of properties which ensure that this construction provides for a numerically stable, invertible signal representation. Our primary algorithmic contributions come via the introduction and discussion of specific signal adaptation criteria in deterministic and stochastic settings, based respectively on time-frequency concentration and nonstationarity detection. We conclude with a short speech enhancement example that serves to highlight potential applications of our approach.
On the Longest Common Pattern Contained in Two or More Random Permutations
Michael Earnest,Anant Godbole,Yevgeniy Rudoy
Mathematics , 2014,
Abstract: We provide upper and lower bounds for the expected length $\mathbb E(L_{n,m})$ of the longest common pattern contained in $m$ random permutations of length $n$. We also address the tightness of the concentration of $L_{n,m}$ around $\mathbb E(L_{n,m})$.
The Main Difficulties When Studying Russian Verbs of Motion in a Figurative Meaning  [PDF]
Irina Skripnikova
Open Journal of Modern Linguistics (OJML) , 2012, DOI: 10.4236/ojml.2012.24019
Abstract: Russian language acquisition requires deep and intensive studying of the concept of verbs of motion. There is a strong opinion that verbs of motion are one of the hardest concepts in the Russian language. However, it is an important issue, as motion verbs are among the most used in any language and nowadays there are hundreds of expressions with these verbs which can be heard quite frequently in the Russian language. Needless to say that mastering these verbs is even harder when they have figurative meaning. Therefore, the purpose of this paper is to demonstrate the importance of studying the figurative meanings of Russian verbs of motion and to prove that the process of teaching students these verbs is more efficient when they are compared with their English equivalents.
Preventative Strategies in the Management of ROP: A Review of Literature  [PDF]
Irina Livshitz
Open Journal of Pediatrics (OJPed) , 2015, DOI: 10.4236/ojped.2015.52018
Abstract:

Retinopathy of prematurity (ROP) is a potentially blinding eye disorder that primarily affects premature infants weighing 1250 grams or less that are born before 31 weeks of gestation. It is one of the most common causes of visual loss in childhood and can lead to lifelong vision impairment and blindness. Certain strategies for prevention have been confirmed by numerous trials, namely the role of oxygen therapy as an independent risk factor for the development of ROP and the benefits of strict control of premature infant oxygen saturations in the NICU. There is valuable data that supports use of other approaches, such as beta adrenergic blockade and IGF-1 supplementation, for which clinical trials are still in the works to establish clear protocols for their clinical use. Supplementation with vitamin A, omega-3 fatty acids, and inositol are all exciting arenas for further trials as preliminary data shows promising results in ROP prevention. It has also been shown that the benefit of vitamin E is not worth the increased incidence of NEC and sepsis as potential side effects. Furthermore, while it was an interesting idea to use the chelator D-penicillamine as a preventative strategy for ROP, the results of multiple trials seemed to be equivocal. This brief review is not all-inclusive, as there are many more modes of prevention currently being studied.

KARMA: Kalman-based autoregressive moving average modeling and inference for formant and antiformant tracking
Daryush D. Mehta,Daniel Rudoy,Patrick J. Wolfe
Computer Science , 2011, DOI: 10.1121/1.4739462
Abstract: Vocal tract resonance characteristics in acoustic speech signals are classically tracked using frame-by-frame point estimates of formant frequencies followed by candidate selection and smoothing using dynamic programming methods that minimize ad hoc cost functions. The goal of the current work is to provide both point estimates and associated uncertainties of center frequencies and bandwidths in a statistically principled state-space framework. Extended Kalman (K) algorithms take advantage of a linearized mapping to infer formant and antiformant parameters from frame-based estimates of autoregressive moving average (ARMA) cepstral coefficients. Error analysis of KARMA, WaveSurfer, and Praat is accomplished in the all-pole case using a manually marked formant database and synthesized speech waveforms. KARMA formant tracks exhibit lower overall root-mean-square error relative to the two benchmark algorithms, with third formant tracking more challenging. Antiformant tracking performance of KARMA is illustrated using synthesized and spoken nasal phonemes. The simultaneous tracking of uncertainty levels enables practitioners to recognize time-varying confidence in parameters of interest and adjust algorithmic settings accordingly.
Page 1 /2316
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.