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Search Results: 1 - 10 of 401461 matches for " M. Segal "
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Cooling Techniques for Trapped Ions
Daniel M. Segal,Christof Wunderlich
Physics , 2014, DOI: 10.1142/9781783264063_0003
Abstract: This book chapter gives an introduction to, and an overview of, methods for cooling trapped ions. The main addressees are researchers entering the field. It is not intended as a comprehensive survey and historical account of the extensive literature on this topic. We present the physical ideas behind several cooling schemes, outline their mathematical description, and point to relevant literature useful for a more in-depth study of this topic.
Frequency of Blood Cultures Performed in a Community Hospital  [PDF]
Jaslyn M. Maurer, Janice M. Burns, Mary R. Godfrey, Carl M. Urban, Sorana Segal-Maurer
Open Journal of Medical Microbiology (OJMM) , 2013, DOI: 10.4236/ojmm.2013.32019
Abstract: Background: Blood cultures (BCs) are obtained to identify etiologic organisms, demonstrate antibiotic efficacy, determine duration of treatment, and/or suggest further interventions. Published guidelines do not clearly state indications and timing for obtaining BCs. As a result, clinicians may obtain too many BCs, increasing cost and patient discomfort. Objective: To determine frequency of BCs performed at our hospital as part of a quality improvement project. Design: Retrospective review of all BCs submitted during a randomly selected month. Setting: A New York City 535-bed, university-affiliated community hospital. Measurements: Patient demographics and BC data were obtained from medical and laboratory records. Results: During the selected month, 2280 BCs were performed for 379 patients. Negative BCs were seen in 221 patients (58%) with one-half having multiple BCs performed within 48 hours of admission and prior to obtaining results of initial BCs. Repeat BCs frequently did not reveal further pathogens among patients with either negative or positive initial BCs. Conclusions: Two-thirds of BCs were obtained from less than one-half of patients without added clinical utility. Often, BCs were repeated prior to results of initial BCs or repeated in patients receiving antibiotics in spite of known low yield following antibiotic initiation. Clinical assessment and review of initial BCs prior to obtaining further BCs is necessary. Staff education regarding appropriate clinical setting for BCs and indications for repeat BCs is required to maximize utilization of resources, improve diagnostic yield, and limit patient discomfort.
Análisis de Estrategias de Desacoplamiento en Sistemas Interactuantes de Control de Procesos
K?ppel,V.; Segal,M.; Remer,M.;
Información tecnológica , 2004, DOI: 10.4067/S0718-07642004000600013
Abstract: in this paper, decoupling strategies for interacting systems of process control are analyzed, based on decouplers and on the pairing of variables according to the relative gains matrix. the strategies are applied to a simplified typical distillation system, followed by computer simulation. it is shown here that with decouplers, even when there is a satisfactory performance against set-point changes, a notable deterioration occurs in the response to disturbances. this leads to discarding this strategy for process control, where the response to these inputs is the most important. conversely, the strategy based in the relative gain matrix, even if reduced in scope and limited to cases with suitable configurations, can be used since it gives performance against disturbances that is acceptable, in spite of a certain degree of deterioration.
Análisis de Estrategias de Desacoplamiento en Sistemas Interactuantes de Control de Procesos Analysis of the Decoupling Strategies in Interacting Systems of Process Control
V. K?ppel,M. Segal,M. Remer
Información Tecnológica , 2004,
Abstract: Se analizan los recursos de desacoplamiento para sistemas multivariables interactuantes de control de procesos, basados en el uso de desacopladores y en el apareamiento de variables por matriz de ganancias relativas. Las estrategias se aplican a un sistema típico de destilación simplificado con seguimiento por simulación. Se demuestra que con los desacopladores, si bien hay un comportamiento satisfactorio frente a los cambios de referencia, hay un notorio deterioro en las respuestas a perturbaciones. Esto lleva a desestimar este recurso para control de procesos, donde interesa más la respuesta frente a esas excitaciones. La estrategia de matriz de ganancias relativas, en cambio, si bien de menor alcance y limitada a los casos con configuraciones favorables puede aplicarse ya que conduce a respuestas frente a perturbaciones que aún con un cierto deterioro son aceptables. In this paper, decoupling strategies for interacting systems of process control are analyzed, based on decouplers and on the pairing of variables according to the relative gains matrix. The strategies are applied to a simplified typical distillation system, followed by computer simulation. It is shown here that with decouplers, even when there is a satisfactory performance against set-point changes, a notable deterioration occurs in the response to disturbances. This leads to discarding this strategy for process control, where the response to these inputs is the most important. Conversely, the strategy based in the relative gain matrix, even if reduced in scope and limited to cases with suitable configurations, can be used since it gives performance against disturbances that is acceptable, in spite of a certain degree of deterioration.
Retrospective Assessments of Childhood Psychopathology by Adults and Their Parents  [PDF]
Frederick L. Coolidge, Gina M. Tambone, Robert L. Durham, Daniel L. Segal
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.23026
Abstract: The present study compared retrospective personality and psychopathological assessments of adults about their childhood and adolescence with concurrent assessments by one of their parents. One-hundred three college stu-dents (Mage = 23.1 years) and one of their parents (Mage = 51.2 years) completed a retrospective version of the 200-item, parent-as-respondent, Coolidge Personality and Neuropsychological Inventory (R-CPNI). The median internal scale reliabilities (Cronbach’s α) for all 46 scales of the R-CPNI were substantial for the adult retrospec-tive (α = 0.78) and the parent retrospective versions (α = 0.79), and there was a strong correlation between the adult and parent retrospective scale reliabilities (r = 0.88). To evaluate group differences, t tests revealed that the parent means were significantly lower than the adult means on 45 of the 46 scales with mostly large effect sizes. Principal components analyses of the scales for both adult and parent retrospective versions were strongly and positively correlated (r = 0.88) for the total number of components extracted. These findings appear to support the contention that retrospective assessments tend to be reliable and valid and that parents’ retrospective recol-lections of their children’s psychopathology tend to be more positive than the retrospective reports by the adults. Based on these preliminary findings, it appears that the R-CPNI may provide a unique and interesting tool for the retrospective measurement of psychopathology.
Numerical Solution Techniques for the Steady Incompressible Navier-Stokes Problem
M. ur Rehman,C. Vuik,G. Segal
Lecture Notes in Engineering and Computer Science , 2008,
Abstract:
Phenomenology, Hermeneutics and Psychotherapy
H G Pretorius,A M Segal
Health SA Gesondheid , 2000, DOI: 10.4102/hsag.v5i4.46
Abstract: This paper suggests some avenues that the conscientious psychotherapist may choose to adopt in order to answer the question: "Who is that person over there called "the patient"?" Opsomming Hierdie artikel stel moontlikhede voor wat die konsensieuse psigoterapeut kan gebruik om derhalwe die volgende vrae te beantwoord: Wie is hierdie persoon wat ons die pasient noem? *Please note: This is a reduced version of the abstract. Please refer to PDF for full text.
Preconditioners for the Steady Incompressible Navier-Stokes Problem
M. ur Rehman,C. Vuik,G. Segal
IAENG International Journal of Applied Mathematics , 2008,
Abstract:
Heritability Estimates of Karen Horney’s Core Neurotic Trends in a Young Adult Twin Sample  [PDF]
Frederick L. Coolidge, Daniel L. Segal, Alisa J. Estey, Frank M. Spinath, Elisabeth Hahn, Juliana Gottschling
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.615199
Abstract: Objective: The purpose of the present study was to explore the heritability of psychoanalyst Karen Horney’s three core neurotic trends (i.e., compliance, aggression, and detachment) in a twin paradigm to evaluate the validity of her theoretically assumed origins of neuroses. Method: Data were collected from 168 adult participants (M age = 21.54 years; range = 18 - 25 years) including 60 monozygotic twin pairs (10 male pairs and 50 female pairs) and 24 dizygotic twin pairs (4 male pairs and 20 female pairs). Participants completed the 57-item Horney-Coolidge Tridimensional Inventory (HCTI). Results: The best fitting model for compliance and detachment included additive genetic and nonshared environmental influences. For aggression, phenotypic variance was completely traced back to shared and nonshared environmental influences. Conclusions: The results are discussed in light of Horney’s hypotheses for the genesis of neurotic trends as well as findings from behavioral genetic research.
Inhomogeneity and transverse voltage in superconductors
A. Segal,M. Karpovski,A. Gerber
Physics , 2011, DOI: 10.1103/PhysRevB.83.094531
Abstract: Voltages parallel and transverse to electric current in slightly inhomogeneous superconductors can contain components proportional to the field and temperature derivatives of the longitudinal and Hall resistivities. We show that these anomalous contributions can be the origin of the zero field and even-in-field transverse voltage occasionally observed at the superconductor to normal state transition. The same mechanism can also cause an anomaly in the odd-in-field transverse voltage interfering the Hall effect signal.
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