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Search Results: 1 - 10 of 447553 matches for " E. S.; "
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Liquid Column Deformation and Particle Size Distribution in Gas Atomization  [PDF]
Georgios S. E. Antipas
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.22012
Abstract: A water-gas flow injected by a close coupled atomizer was studied via High Speed Photography and Phase Doppler Anemometry. The formation of a wave disturbance on the surface of the water column was confirmed. The flow converged within an area approximately 3 mm in diameter, independent of atomization conditions. The particle size distribution across the spray suggested a trend of decreasing particle sizes and particle velocities with increasing distance from the spray axis of symmetry.
Days of “Zero” level geomagnetic activity accompanied by the high neutron activity and dynamics of some medical events—Antipodes to geomagnetic storms  [PDF]
E. Stoupel, E. S. Babayev, E. Abramson, J. Sulkes
Health (Health) , 2013, DOI: 10.4236/health.2013.55113
Abstract:

The links of many medical-biological events with high levels of geomagnetic activity (GMA) are widely discussed. In recent years, several medical phenomena were described in inverse distribution by time with GMA. Also a concurrent to GMA and solar activity force-cosmic ray activity (CRA) and closely related high energy neutron and proton fluxes are studied as a forces dominating at low GMA and solar activity in relation to considered medical events. The aim of this study was to explore the distribution of some important medical events on days with “Zero” GMA levels, accompanied by high CRA (neutron activity). Medical event data of the Grand Baku region (more than 3 mln inhabitants), Azerbaijan, with daily distribution on the time 1 Dec. 2002-31 Dec. 2007 was compared to daily GMA Kp indices in general (Kp > 0, 1837 days) and 34 days daily GMA indices Kp = 0. Daily CRA data was also compared using neutron monitoring data from two stations. Daily averaged data and their standard deviations on the mentioned GMA levels were compared and statistical significance was established. Results revealed a significant rise in the number of emergencies (n = 1,567,576) and total deaths number (n = 46,360) at the days of “Zero” GMA level. These days were accompanied by significant rise of CRA (neutron activity). For Sudden Cardiac Deaths (SCD, n = 1615) and cerebral stroke (CVA, n =10,054) the increase achieved strong trend to significance level. Acute Myocardial Infarction occurrence (morbidity) and trauma were also absolutely more registered at days with “Zero” GMA level, despite the small number of such days. The average Infection numbers show an inverse relationship with absolutely high registry at the “Zero” GMA level days. Study linking environmental physical activity levels and the human medical data shows that geomagnetic field variations accompanied by the increased level of cosmic ray activity, can have either direct or indirect adverse effects on human health and physiology, even when the magnitude of the geomagnetic field disturbance is extremely small or even is equal to zero. On days of “Zero” daily Kp indices describing

Use of oral ketamine for analgesia during reduction/manipulation of fracture/dislocation in the Emergency Room: An initial experience in a low-resource setting  [PDF]
E. Ogboli-Nwasor, K. E. Amaefule, S. S. Audu
Pain Studies and Treatment (PST) , 2014, DOI: 10.4236/pst.2014.21004
Abstract:

Background: The use of ketamine for relief of procedure-related pain is limited in our environment. Ketamine, a phencyclidine derivative commonly used for induction and maintenance of anaesthesia, is administered routinely via the intravenous and intramuscular routes. One of the concerns while using ketamine for analgesia via these two routes is that the drug may produce anaesthesia, rather than analgesia alone. Aims and Objectives: We sought to find out if ketamine given via the oral route could be used to provide analgesia during minor orthopaedic procedures in the emergency room. We also wanted to find out if there were side-effects peculiar to the oral route. Methods: A prospective observational pilot study in consecutive patientswith fractures/dislocation in our Emergency Room was recruited into the study. All patients gave informed consent. Reduction of fractures was done 15 minutes following the administration of ketamine 5 mg/kg orally. The patients were observed during and after the procedure and the findings entered into a proforma. The data obtained were analyzed using simple statistical methods and the results presented in a table. The findings are discussed. Results: There were 9 males and 2 females with an age range of 4 yrs to 48 yrs. Pain levels were assessed using verbal rating scales. Seven patients (64%) had severe pain before administration of ketamine while 2 patients (18%) each had mild and moderate pain respectively. Four patients had Colle’s fracture only and 1 patient had a Colle’s fracture with a supracondylar femoral fracture. Two patients had tibial fractures, one patient had a complete knee dislocation, while 2 others had ulnar/radial fractures. One other patient had humeral and tibial fractures. For up to 15 minutes after the procedures all but one patient were pain-free. Five (5) patients (45.5%) were noticed to have drowsiness, 3 patients (27%) were sedated while 2 patients (18%) had no side-effects at all. Five (5) patients (45.5%) reported excellent analgesia while 6 patients (64%) said the intra and post procedure analgesia was very good. Conclusions: Oral ketamine may be useful in providing analgesia for minor procedures in the emergency room. Ketamine when sweetened with a soda drink appears to be palatable with a rapid onset of action and few side effects. Thus ketamine given orally may be a cheaper and more accessible option for effective pain-relief in the emergency room. There is a need to conduct more studies on a larger number of patients.

Cost Effective Operating Strategy for Unit Commitment and Economic Dispatch of Thermal Power Plants with Cubic Cost Functions Using TLBO Algorithm  [PDF]
E. B. Elanchezhian, S. Subramanian, S. Ganesan
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.36003
Abstract: This paper deals with a Unit Commitment (UC) problem of a power plant aimed to find the optimal scheduling of the generating units involving cubic cost functions. The problem has non convex generator characteristics, which makes it very hard to handle the corresponding mathematical models. However, Teaching Learning Based Optimization (TLBO) has reached a high efficiency, in terms of solution accuracy and computing time for such non convex problems. Hence, TLBO is applied for scheduling of generators with higher order cost characteristics, and turns out to be computationally solvable. In particular, we represent a model that takes into account the accurate higher order generator cost functions along with ramp limits, and turns to be more general and efficient than those available in the literature. The behavior of the model is analyzed through proposed technique on modified IEEE-24 bus system.
A Nonlinear Control Model of Growth, Risk and Structural Change  [PDF]
P. E. Petrakis, S. Kotsios
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.22010
Abstract: Uncertainty is perceived as the means of removing the obstacles to growth through the activation of Knig- htian entrepreneurship. A dynamic stochastic model of continuous-time growth is proposed and empirically tested, including equilibrating and creative entrepreneurial activity. We find that uncertainty affects economic growth and the rate of return, and causes structural changes in portfolio shares for the two types of entrepreneurial events. Structural change depends mainly on the intertemporal rate of substitution, productiv-ity ratios, and finally intersectoral difference in return and risk.
Measurement of charm production in deep inelastic scattering with the ZEUS detector
S. E. S. Schagen
Physics , 2001, DOI: 10.1142/9789812778345_0018
Abstract: We present measurements of charm production in DIS using the ZEUS detector. Data with an integrated luminosity of 83 pb$^{-1}$ have been analysed. For the channel $D^{*+} \to D^{0}\pi_{s}^{+} \to K^{-}\pi^{+}\pi_{s}^{+} (+ c.c.)$ a cross section has been extracted, differential in the kinematical variables $Q^{2}$ and Bjorken $x$. In addition the decay $\overline{c}q \to e^-\overline{\nu}_e X$ has been studied in a data sample of an integrated luminosity of 34 pb$^{-1}$. This results in a cross section, differential in $Q^2$,$x$ and $W$ of the event and in $p_{T}$ and $\eta$ of the decay electron. The structure function f2-charm has also been determined for this channel. All measured cross sections show good agreement with NLO pQCD predictions from HVQDIS.
A description of several coordinate systems for hyperbolic spaces
S. S. e Costa
Mathematics , 2001,
Abstract: This article simply presents several coordinate systems for 2 and 3-dimensional hyperbolic spaces, describing the general solutions of Helmholtz equation in each one of these systems.
Quasi Exact Solution of the Fisher Equation  [PDF]
G. Dattoli, E. Di Palma, E. Sabia, S. Licciardi
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.48A002
Abstract: We propose an accurate non numerical solution of the Fisher Equation (FE), capable of reproducing the known analytical solutions and those obtained from a numerical analysis. The form we propose is based on educated guesses concerning the possibility of merging diffusive and logistic behavior into a single formula.
Cerebral Vascular Accidents (CVA) Victims Conception and Birth Time-Links to Longevity, Lithuania, 1989-2013  [PDF]
E. Stoupel, J. Petrauskiene, R. Kalediene, S. Sauliune, E. Abramson
Health (Health) , 2015, DOI: 10.4236/health.2015.71018
Abstract: In year 2001 a paper in the ANAS considered links between month of birth and longevity. In the following years we published four papers related to “big killers” (cardiac and oncology) that showed some differences in birth months distribution of this group and studied by LA, NS Gavrilov’s centenarians. The aim of this study was to study conception and birth months of another modern “big killer”—cerebral stroke (CVA) that is taking a leading role among cardiovascular causes of death in the last decades. Methods: 130,120 deaths of both gender CVA victims in Lithuania at 1989-2013 were studied. In addition to birth month, the months of conception (9 months before birth) were studied. Our data were compared with results of centenarians (birth of LA, NS Gavrilov’s study and transformed by authors also their conception month). Results: The maximum of births were January, March and May for CVA victims, while the analogical conception maximum were in April, June, May and July. The similar data for centenarians were that maximal births were in November, September, October (LA, NS Gavrilov) and conception in December, January, February. These results are similar to data related to cardiac and oncology deaths published in our previous publications. Conclusion: The conception and birth month of victims of CVA is different of similar data obtained by centenarians study. Different environmental conditions at different parts of the year and solar cycle can play a role affecting the embryo at early stages of development, predisposing to some pathologies in coming years of life.
Cerebral Vascular Accidents (CVA) Victims Conception and Birth Time-Links to Longevity, Lithuania, 1989-2013  [PDF]
E. Stoupel, J. Petrauskiene, R. Kalediene, S. Sauliune, E. Abramson
Health (Health) , 2015, DOI: 10.4236/health.2015.71018
Abstract: In year 2001 a paper in the ANAS considered links between month of birth and longevity. In the following years we published four papers related to “big killers” (cardiac and oncology) that showed some differences in birth months distribution of this group and studied by LA, NS Gavrilov’s centenarians. The aim of this study was to study conception and birth months of another modern “big killer”—cerebral stroke (CVA) that is taking a leading role among cardiovascular causes of death in the last decades. Methods: 130,120 deaths of both gender CVA victims in Lithuania at 1989-2013 were studied. In addition to birth month, the months of conception (9 months before birth) were studied. Our data were compared with results of centenarians (birth of LA, NS Gavrilov’s study and transformed by authors also their conception month). Results: The maximum of births were January, March and May for CVA victims, while the analogical conception maximum were in April, June, May and July. The similar data for centenarians were that maximal births were in November, September, October (LA, NS Gavrilov) and conception in December, January, February. These results are similar to data related to cardiac and oncology deaths published in our previous publications. Conclusion: The conception and birth month of victims of CVA is different of similar data obtained by centenarians study. Different environmental conditions at different parts of the year and solar cycle can play a role affecting the embryo at early stages of development, predisposing to some pathologies in coming years of life.
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