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Search Results: 1 - 10 of 1670 matches for " Tamara Breus "
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Investigation of the Effect of Ambient Temperature and Geomagnetic Activity on the Vascular Parameters of Healthy Volunteers  [PDF]
Yury Gurfinkel, Tamara Breus, Tatyana Zenchenko, Vadim Ozheredov
Open Journal of Biophysics (OJBIPHY) , 2012, DOI: 10.4236/ojbiphy.2012.22007
Abstract: Aim of this paper is to reveal whether the geomagnetic activity (GMA) and meteorological factors (MFs) affect vascular parameters of healthy volunteers. As a trial study we used new device “Tonocard,” and new vascular parameters for study—a pulse wave velocity (PWV) and an endothelial function (EnF) in addition to blood pressure measurements. These parameters never investigated before in such aspects. As far as novelty of device itself and investigated parameters we limited ourselves by monitoring only four healthy volunteers (without cardiovascular pathology). To analyze the sensitivity of their aforementioned medical indices to GMA and MFs two independent mathematical approaches were used, one of whom is based on traditional methods of mathematical statistics and the other on the theory of pattern recognition Dependence of physiological characteristics on the atmospheric temperature, revealed by both applied mathematical approaches, showed complex non-linear character of biological replies: the reaction has a different form in different temperature ranges and is manifested in the form of synchronization of slow variations of physiological and atmospheric parameters (trends) with a period of several days, while the daily variations were virtually independent. The systolic blood pressure (SBP), PWV and a difference between two specially selected values of PWV (DPWV) are approximately equally depending on atmospheric temperature, which accounts for an average of 26% to 28% of their variations. Sensitivity to the GMA for this test was found only for PWV.
Effects of geomagnetic disturbances on humans functional state in space flight  [PDF]
Tamara K. Breus, Roman M. Baevskii, Anna G. Chernikova
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.56044
Abstract: Investigations of the effect of geomagnetic activity influence on the heart rhythm regulation of cosmonauts during the expeditions onboard the Soyuz spacecraft, and the MIR orbital space stations was carried out for various durations of flight in weightlessness and, under control of groups of cosmonauts who were inspected under flight conditions outside the geomagnetic disturbances and in ground preflight conditions, during disturbances and without them. The four series of analytical researches in which the data about changes of characteristics of heart rate variability are demonstrated for the first time the presence of specific effect of geomagnetic disturbances on the system of vegetative regulation of blood circulation of cosmonauts during the flight. The response of cosmonauts’ heart rhythm on the magnetic storm is depending on the initial functional background and, in particular, on the state of mechanisms of vegetative regulation (the duration of flight and adaptation to it).
World Demand as a Determinant of Immiserizing Growth  [PDF]
Tamara Todorova
iBusiness (IB) , 2010, DOI: 10.4236/ib.2010.23033
Abstract: Theoretically economic growth could have negative effects over the growing economy when production expands for products the world demand for which is inelastic. If growth occurs in sectors and for products the world demand for which is elastic it could be expected that total revenues to domestic producers and exporters increase. Our goal is to prove that growth would be immiserizing only for products for which world demand is inelastic and expansion leads to a sizable worsening of the terms of trade. We show that there are few such commodities, namely food products and natural resources such as oil. Studying econometrically the demand function for Brazilian coffee as an example, we compare our estimation of the elasticity of demand for Brazil’s exports of green coffee with other research on the world elasticity of demand for green coffee. We conclude that for manufactured products the demand for which is highly elastic it is unlikely that exporting countries fall into immiserization, therefore, growth and further participation in global trade turn out to be quite beneficial. Our conclusion is that too much emphasis is put in economic theory and trade policy on the concept of immiserizing growth which is more of a theoretical possibility than a real-life problem.
The Economic Dynamics of Inflation and Unemployment  [PDF]
Tamara Todorova
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.22025
Abstract: We study the time path of inflation and unemployment using the Blanchard treatment of the relationship between the two and taking the monetary policy condition into account. We solve the model both in continuous and discrete time and compare the results. The economic dynamics of inflation and unemployment shows that they fluctuate around their intertemporal equilibria, inflation around the growth rate of nominal money supply, respectively, and unemployment around the natural rate of unemployment. However, while the continuous-time case shows uniform and smooth fluctuation for both economic variables, in discrete time their time path is explosive and nonoscillatory. The hysteresis case shows dynamic stability and convergence for inflation and unemployment to their intertemporal equilibria both in discrete and continuous time. When inflation affects unemployment adversely the time paths of the two, both in discrete and continuous time, are dynamically unstable.
Implementation of Creative Education Policy in Russian Higher Education Curricula  [PDF]
Tamara Savelyeva
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.52014
Abstract:

An ongoing restructuring of Russian higher education prioritizes development of a “creative educational system” as one of its policy directions. Following this recent policy mandate, Russian universities have been introducing new curricular models, which they adopt from the Western academic school of teaching and learning. However, Western-designed curricular novelties and methodologies that support creative education policies have been criticized for lacking success in Russian HE due to key differences in traditional cultures of educational systems. How do faculty facilitate curricular changes in support of the creative education policy? This study addresses this question by exploring the implementation of a specific curricular module in the field of creative education—the Sustainability project in two Russian universities. The resulting descriptive model comprises antecedents, processes, and contents of the project implementation under three broad categories of the university restructuring: organization, environment, and relation. I discuss the findings in terms of the two important characteristics of the resulted curricular implementation model: (1) the culturally sensitive nature of creative education curricular adaptation in post-Soviet higher education, and (2) non-linearity of the curricular education policy enactment in Russian university classrooms.

Variability of the Spin Period of the White Dwarf in the Magnetic Cataclysmic Binary System EX Hya
Ivan L. Andronov,Vitalii V. Breus
Physics , 2013, DOI: 10.1007/s10511-013-9304-7
Abstract: The observations of the two-periodic magnetic cataclysmic system EX Hya have been carried out, using the telescopes RC16 and TOA-150 of the Tzec Maun observatory. 6 nights of observations were obtained in 2010-2011 (alternatively changing filters VR). Also the databases of WASP, ASAS and AAVSO have been analyzed. Processing time series was carried out using the program MCV. We analyzed changes in the rotation period of the white dwarf, and based on our own and previously published moments of maximum. The ephemeris was determined for the maxima of the radiation flux associated with the rotation of the magnetic white dwarf: Tmax=2437699.89079(59) +0.0465464808(69).E-6.3(2)*10^{-13}E^2, which corresponds to the characteristic timescale of the rotation spin-up of 4.67(14)*10^6 years. This contradicts the estimated value of the mass of the white dwarf of 0.42M_\odot, based on X-ray observations made by Yuasa et al (2010), however, is consistent with estimates of the masses of 0.79 M_\odot (white dwarf) and 0.108 M_\odot (red dwarf) previously published Beuermann and Reinsch (2008), and the assumption that the capture of accreted plasma by magnetic field of the white dwarf is near the border of the Roche lobe. Analyzed moments do not support the assumption of Mauche et al (2009) for a statistically significant cubic term in the ephemeris. Despite the presence of outbursts in EX Hya, there are significant differences from the DO Dra, which supports the introduction to a detailed classification of the intermediate polars the groups of "outbursting intermediate polars" and "magnetic dwarf novae."
Positron Emission Tomography-Computed Tomography (PET-CT) in Head and Neck Pathology  [PDF]
Luis A. Tamara, Ines Velez, Claudia Tamara
Open Journal of Radiology (OJRad) , 2011, DOI: 10.4236/ojrad.2011.11002
Abstract: Cancer of the head and neck is often devastating and the morbidity associated with its treatment is substantial. Positron Emission Tomography-Computed Tomography (PET-CT) combines the power of biological / molecular imaging with the anatomic detail of CT in order to provide a very sensitive and specific imaging tool for the evaluation of head and neck pathology. PET can aid the clinician in establishing diagnosis, staging, (It has been shown to be more accurate than CT), assessing, prognosis and determining response to therapy. Lymphoma, melanoma, multiple myeloma, leukemia, salivary gland tumors, odontogenic carcinomas, soft tissue sarcomas, thyroid, parathyroid, lacrimal gland and bone / cartilage tumors are some of the entities where PET-CT may be useful. (Tumors of salivary glands and of odontogenic tissue are particularly difficult to diagnose due to the relative infrequency when compared with other tumors and the extremely vast histologic variation).It is important to note that carcinoma metastasis, is the most common malignancy found within the mandibular bone. PET-CT and skeletal scintigraphy are both very sensitive and specific in these types of patients.
Stress among Brazilian Dental Students in Different Periods: Prevalence and Perceptions  [PDF]
Jean érick Langoski, Letícia Breus Klipan, Danielle Bordin, Marcelo Ubiali Ferracioli, Márcia Helena Baldani Pinto, Cristina Berger Fadel
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.63030
Abstract: The purpose of this exploratory study was to investigate the influence of the school year, considering different times on the academic trajectory of stress among Brazilian dental students (n = 111) as well as grasp the values established by the subject facing this prospect. The methodological grant for data collection was the Inventory of Stress Symptoms for Adults Lipp applied in the beginning and at the end of the semester, and the technique in the focus group interview. The results demonstrated academic tickets with significantly higher rates of this phenomenon at the end of the semester, when compared to graduates (p = 0.004). The perceptions of academics on the etiology of stress associated opinions unveiled the pedagogical design, teacher performance, difficulties in interpersonal relationships as well as the course extrinsic factors. It can be concluded that the stress is the present and modulate phenomenon in investigated academic trajectory.
Determination of characteristics of newly discovered eclipsing binary 2MASS J18024395 +4003309 = VSX J180243.9+400331
Ivan L. Andronov,Vitalii V. Breus,Stanislaw Zola
Physics , 2012,
Abstract: During processing the observations of the intermediate polar 1RXS J180340.0+401214, obtained 26.05.2012 at the 60-cm telescope of the Mt. Suhora observatory (Krakow, Poland), variability of 2MASS J18024395+4003309 was discovered. As this object was not listed in the "General Catalogue of Variable Stars" or "Variable Stars Index", we registered it as VSX J180243.9+400331. Additionally we used 189 separate observations from the Catalina Sky Survey spread over 7 years. The periodogram analysis yields the period of 0d.3348837{\pm}0d.0000002.The object was classified as the Algol-type eclipsing binary with a strong effect of ellipticity. The depths of the primary and secondary minima are nearly identical, which corresponds to a brightness (and maybe) mass ratio close to 1. The statistically optimal degree of the trigonometric polynomial n=4. The most recent minimum occurred at HJD 2456074.4904. The brightness range from our data is 16.56-17.52 (V), 16.18-17.08 (R). The NAV ("New Algol Variable") algorithm was applied for statistically optimal phenomenological modeling and determination of corresponding parameters.
Optimal Time and Opportunity Cost of Job Search in Low-Income Groups: An Out-of-the-Job Search Model  [PDF]
Tamara Todorova, Veselina Dzharova
Modern Economy (ME) , 2010, DOI: 10.4236/me.2010.13022
Abstract: Our paper studies the causes of poverty from the perspective of job search. We show that poor people remain poor because they have less time and initial endowment to search for a better job. Initial endowment is key to successful job search, as one can afford not to work and search longer for a better job. Having an initial endowment, a worker is able to educate or re-qualify himself. Working long hours and obtaining low pay, poor people have little time to look for a better job. Low-paid, low-skilled jobs rarely allow on-the-job search like high-paid positions where with the help of contacts and a lot of idle time professionals seek better jobs. Quitting in order to find a better job increases the opportunity cost of search for poorer people. Since they do not have any accumulated income, they can only live off their salary. With less income and time, poorer people are less likely to get educated since education requires both wealth and free time. But being less educated, they are likely to remain poor as education is a promise for success in contemporary society. Thus, they remain in the vicious circle of poverty. In order to prove this hypothesis we investigate optimal search time for a better job as dependent on factors such as wage rate, individual’s income, education, and skills.
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