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Search Results: 1 - 10 of 97 matches for " Styliani Kafka "
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The 2010 early outburst spectrum of the recurrent nova U Scorpii
Styliani Kafka,Robert Williams
Physics , 2010, DOI: 10.1051/0004-6361/201015415
Abstract: Aims. We present optical spectra of the fast recurrent nova U Sco during its recent outburst, obtained within 24 hr of maximum light. Methods. We use medium resolution (R~4000) spectra taken with the with the MagE spectrograph on the Magellan (Clay) 6.5m telescope of the Las Campanas Observatories. Results. The spectrum is notable for its lack of a low ionization transient heavy element absorption system that is visible in the large majority of novae near maximum light. We suggest that this may be due to the dominance of inner Lagrangian L1 mass transfer and the absence of a circumbinary gas reservoir in this object
STRATEGY, PROCESSES ANDRISKS AS KEY PERFORMANCE INDICATORS FOR AN ASSESSMENT OF MANAGEMENT OF THE UNIVERSITY / Strategie, procesy a rizika jako klí ová kritéria pro hodnocení systému ízení univerzity
Kafka Tomá?
Technológia vzdelávania , 2009,
Abstract: P íspěvek poukazuje na pot ebu profesionalizace ízení univerzity umocněnou zejména rostoucí světovou konkurencí v oblasti terciálního vzdělávání. Jsou zde vymezena klí ová kritéria pro hodnocení kvality systému ízení univerzity a to na p íkladech nejen z eskych ve ejnych a soukromych vysokych kol, ale rovně izuni-verzit ze zahrani í. Systém ízení univerzity je v p íspěvku pova ován za nedílnou sou ást tzv. Univerzity Governance".
Ante la ley
Kafka Franz
Cuadernos de Economía , 1999,
Abstract: Ante las puertas de la ley hay un guardian. Un campesino se llega hasta ese guardian y le pide que le permita entra en la ley, pero el guardian le dice que por ahora no se lo puede permitir. El hombre reflexiona y entonces pregunta si podria entrar despues. Es posible -dice el guardian-; pero no ahora. La puerta de entrada a la ley esta abierta como siempre.
Atmospheric neutrino interactions in Soudan-2
T. Kafka
Physics , 1997, DOI: 10.1016/S0920-5632(98)00446-0
Abstract: A new measurement of the atmospheric numu/nue ratio-of-ratios, 0.61 +- 0.15 +- 0.05, has been obtained using a 3.2-kty exposure of the Soudan-2 underground detector. This measurement, based upon neutrino reactions in an iron tracking calorimeter of honeycomb-lattice geometry, is in agreement with the anomalously low value reported by the underground water detectors.
Recent atmospheric neutrino results from Soudan 2
T. Kafka
Physics , 1999, DOI: 10.1016/S0920-5632(00)00661-7
Abstract: An updated measurement of the atmospheric nu_mu/nu_e ratio-of-ratios, 0.68+-0.11+-0.06, has been obtained using a 4.6-kty exposure of the Soudan-2 iron tracking calorimeter. The L/E distributions have been analyzed for effects of nu_mu -> nu_x oscillations, and an allowed region in the Delta m^2 vs. sin^2 2 theta plane has been determined.
Obesity: A chronic disease
Styliani Zerva,Magdalini Zerdila
To Vima tou Asklipiou , 2009,
Abstract: The last decades, obesity represents one of the most serious health issues with approximately 310 million people presently affected globaly and is frequently cited as a chronic disease. The term obesity refers to the excessive accumulation of fat, mainly under the skin but also on various organs of the body. Obesity’s most common cause is the intake of more calories than those required for one’s daily needs.The aim of the study was to review etiology of obesity, as well as the accountable risk factors.The method οf this study included bibliography research from both the review and the research literature which referred to the etiology, the risk factors of obesity and the beneficial role of physical exercise on weight management.Results: The majority of research studies showed that a growing number of adults, children and adolescents around the world, is facing the danger of becoming obese. In literature is cited that both genetic and environmental factors are accountable for the development of obesity. It is well established that the main therapeutic approaches to loose weight are life-style modifications and the combination of a well-balanced hypocaloric diet with regular physical exercise.Conclusions: The problem of obesity and overweight has become an epidemic in most developed countries. The rapid increase in the numbers of obese people reflects environmental changes, the reduced activity and also the increased food intake.
Dynamics of Proton Transfer in Mesoscopic Clusters
Styliani Consta,Raymond Kapral
Physics , 1996, DOI: 10.1063/1.471153
Abstract: Proton transfer rates and mechanisms are studied in mesoscopic, liquid-state, molecular clusters. The proton transfer occurs in a proton-ion complex solvated by polar molecules comprising the cluster environment. The rates and mechanisms of the reaction are studied using both adiabatic and non-adiabatic molecular dynamics. For large molecular clusters, the proton-ion complex resides primarily on the surface of the cluster or one layer of solvent molecules inside the surface. The proton transfer occurs as the complex undergoes orientational fluctuations on the cluster surface or penetrates one solvent layer into the cluster leading to solvent configurations that favor the transfer. For smaller clusters the complex resides mostly on the surface of the cluster and proton transfer is observed only when the complex penetrates the cluster and solvent configurations that favor the proton transfer are achieved. Quantitative information on the cluster reaction rate constants is also presented.
Differential Early Fluctuations in Superoxide Dismutase and Catalase Activities Are Included in the Responses of Young Maize Organs to S-Deprivation  [PDF]
Styliani N. Chorianopoulou, Maria Giamouroglou, Dimitris L. Bouranis
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.33040
Abstract: water soluble protein fraction (WSPF) content along with the SOD and the CAT activities were comparatively monitored in leaf blades, sheaths and roots. S-deprivation progressively diminished WSPF first in the sheaths, two days later in the blades, and four days later in the root. SOD activity per mg WSPF decreased at d2, whilst it increased for the next four days. After d6, SOD activities of roots and sheaths decreased, followed by the blades at d10. CAT activity per mg WSPF at d2 decreased only in blades, whilst increased in both sheaths and roots (more in sheaths). After d6 decreased CAT activity was found only in roots. No other decreases were observed in blades and sheaths. SOD and CAT specific activities on DM basis presented an oscillation pattern with the increase of DM. S-deprivation altered this picture, by reversing the oscillation pattern and by decreasing the trendlines. SOD specific activity initially decreased in –S sheaths and roots, whilst it remained unchanged in –S blades. Then it increased abruptly, decreased in an exponential manner and stabilised in all three organs. S-deprivation caused an early fluctuation of the CAT activity and then diverse responses; in blades a late increase in CAT activity was observed and decreases in the other two organs. S-deprivation seemed to reverse the oscillation pattern of CAT specific activity differentially for each organ type.
Motivational Interviewing for Smoking Cessation and Increase of Physical Activity in Αdults  [PDF]
Despoina Leontari, Vasiliki Zisi, Stamatia Gratsani, Styliani Chroni, Yannis Theodorakis
Psychology (PSYCH) , 2017, DOI: 10.4236/psych.2017.812127
Abstract: This study investigated if and how an individual counselling program, based on motivational interviewing, affects lifestyle changes that contribute to smoking cessation and physical activity enhancement. The participants were 2 men and 6 women aged 25 - 54 years. The program consisted of 12 individual weekly counselling sessions based on motivational interviewing. There was a 9 month follow up (monthly sessions, weekly telephone calls). A semi-structured interview was used to evaluate the effectiveness of the program after the intervention. Qualitative content analysis was used, along with the In Vivo Software in organizing the data from the interview. At the end of the follow up, three participants stopped smoking, four participants turned to light smokers (<10 cigarettes per day) and only one person failed to change smoking behavior. The participants reported that the discussion and communication with the advisor were very helpful, such as the support, the commitment, the resistance and the goal setting techniques. The gains that the participants experienced were a general life-style change, smoking cessation or smoking reduction, motivation, sensitization, self-esteem, self-knowledge, safeness, stress reduction, relaxation and better physical condition. It seems that motivational interviewing greatly contributes to helping adults to quit or reduce smoking and adopt a healthier lifestyle.
Comparison of the S-, N- or P-Deprivations’ Impacts on Stomatal Conductance, Transpiration and Photosynthetic Rate of Young Maize Leaves  [PDF]
Dimitris L. Bouranis, Styliani N. Chorianopoulou, Alexandros Dionias, Giouli Sofianou, Aristotelis Thanasoulas, Georgios Liakopoulos, Dimosthenis Nikolopoulos
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.38126
Abstract: Seven-day-old maize (Zea mays) plants were grown hydroponically for ten days in deprived nutrient solutions against the corresponding control grown under full nutrition; the effects of S-, N- or P-deprivation on laminas’ mean stomatal conductance (gs), transpiration rate (E) and photosynthetic rate (A) were monitored, along with the impact on the laminas’ total dry mass (DM), water amount (W), length and surface area (Sa). Furthermore, a time series analysis of each parameter’s response ratios (Rr), i.e. the treatment’s value divided by the corresponding control’s one, was performed. Under S-deprivation, the Rr of laminas’ mean gs, E, and A presented oscillations within a ±15% fluctuation zone, notably the “control” zone, whilst those of laminas’ total DM, water amount, surface area, and length included oscillation during the first days and deviation later on, presenting deviation during d10. Under the N-deprivation conditions all Rr time courses except the A one, included early deviations from the control zone without recovering. The deviation from the control zone appeared at d4. Under P-deprivation, all Rr time courses represented oscillations within the control zone. P-deprivation’s patterns resembled those of S-deprivation. Compared to the one of the S-deprivation, the P-one’s oscillations took place within a broader zone. Linear relationships among the various Rr patterns were found between gs-E, gs-A, E-A, DM-W and DM-Sa. In conclusion, the impact of P-deprivation appeared in an early stage and included an alleviation action, the one of N-deprivation appeared early with no alleviation action, whilst that of S-deprivation appeared later, being rather weaker when compared to the impact of the P-deprivation’s impact.
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