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Search Results: 1 - 10 of 400770 matches for " M;Budde "
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Number distributions for fermions and fermionized bosons in periodic potentials
Michael Budde,Klaus M?lmer
Physics , 2004, DOI: 10.1103/PhysRevA.70.053618
Abstract: We compute the spatial population statistics for one-dimensional fermi-gases and for bose-gases with hard core repulsions in periodic potentials. We show how the statistics depend on the atomic density in the ground state of the system, and we present calculations for the dynamical turn-on of the potential.
The GlideScope® Video Laryngoscope and the Macintosh Laryngoscope Compared in a Simulated Difficult Airway with Immobilization and Bleeding—A Randomized, Prospective, Crossover Study  [PDF]
Wiebke Ackermann, Leonardus M. Pott, Sonia J. Vaida, Arne O. Budde
Open Journal of Anesthesiology (OJAnes) , 2012, DOI: 10.4236/ojanes.2012.22007
Abstract: Background: This study assesses the effectiveness of the GlideScope? Videolaryngoscope (GS) in comparison with the Macintosh laryngoscope in a simulated difficult airway with blood in the airway and restricted range of motion of the neck. 39 participants experienced with the GS and the Macintosh laryngoscope were used. Methods: This analysis is a prospective, randomized, crossover study. Our study was performed on an intubation simulation model with artificial blood in the airway and restricted range of motion. The intubation time was recorded from picking up the laryngoscope to advancing the endotracheal tube through the glottic opening. Secondary endpoints were the Cormack & Lehane score, the percentage of the glottis seen, the subjective difficulty of the procedure on a scale of 0 to 10, the number of adjustment maneuvers, the number of attempts, and the number of failed intubations. Attempts were defined as removal of instruments from the airway and reinsertion. Failed intubations were defined as esophageal intubations or intubations lasting longer than 120 seconds. Results: The mean intubation time was 47.6 seconds with the GS and 21.4 seconds with the Macintosh laryngoscope. There were 3 failed intubations with the Macintosh laryngoscope and 4 failed intubations with the GS. The failed intubations with the Macintosh laryngoscope were all esophageal intubations. The failed intubations with the GS were due to exceeding the time limit of 120 seconds. Both devices had a mean Cormack & Lehane score of 1.8 and the mean percentage of the Glottis seen was 58% for both devices. The average subjective difficulty on a scale from 0 to 10 was ranked 4.16 for the Macintosh and 5.14 for the GS. Participants needed an average of 1 adjustment maneuvers with the Macintosh laryngoscope and 2.7 adjustments with the GS. Conclusion: The GS, used by experienced anesthesiologists in a simulated difficult airway, had an inferior performance compared to the Macintosh laryngoscope in terms of intubation time, number of intubation attempts, number of adjustment maneuvers, and number of failed intubations.
The Effect of Acute Exercise and Psychosocial Stress on Fine Motor Skills and Testosterone Concentration in the Saliva of High School Students
Mirko Wegner, Johan M. Koedijker, Henning Budde
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092953
Abstract: Little is known about the influence of different stressors on fine motor skills, the concentration of testosterone (T), and their interaction in adolescents. Therefore, 62 high school students aged 14–15 years were randomly assigned to two experimental groups (exercise, psychosocial stress) and a control group. Exercise stress was induced at 65–75% of the maximum heart rate by running for 15 minutes (n = 24). Psychosocial stress was generated by an intelligence test (HAWIK-IV), which was uncontrollable and characterized by social-evaluative-threat to the students (n = 21). The control group followed was part of a regular school lesson with the same duration (n = 28). Saliva was collected after a normal school lesson (pre-test) as well as after the intervention/control period (post-test) and was analyzed for testosterone. Fine motor skills were assessed pre- and post-intervention using a manual dexterity test (Flower Trail) from the Movement Assessment Battery for Children-2. A repeated measure ANCOVA including gender as a covariate revealed a significant group by test interaction, indicating an increase in manual dexterity only for the psychosocial stress group. Correlation analysis of all students shows that the change of testosterone from pre- to post-test was directly linked (r = ?.31, p = .01) to the changes in manual dexterity performance. Participants showing high increases in testosterone from pre- to post-test made fewer mistakes in the fine motor skills task. Findings suggest that manual dexterity increases when psychosocial stress is induced and that improvement of manual dexterity performance corresponds with the increase of testosterone.
Superdiffusion in Decoupled Continuous Time Random Walks
C. Budde,D. Prato,M. R=E9
Physics , 2000, DOI: 10.1016/S0375-9601(01)00234-1
Abstract: Continuous time random walk models with decoupled waiting time density are studied. When the spatial one jump probability density belongs to the Levy distribution type and the total time transition is exponential a generalized superdiffusive regime is established. This is verified by showing that the square width of the probability distribution (appropriately defined)grows as $t^{2/\gamma}$ with $0<\gamma\leq2$ when $t\to \infty$. An important connection of our results and those of Tsallis' nonextensive statistics is shown. The normalized q-expectation value of $x^2$ calculated with the corresponding probability distribution behaves exactly as $t^{2/\gamma}$ in the asymptotic limit.
Muttertag“ “Mother’s Day”
Gunilla Budde
querelles-net , 2008,
Abstract: Mit kurzen Geschichten, Photos, Bildern und Gedichten versuchen die Autorinnen eine Ann herung an ihre Mütter zwischen den Jahren 1938 und 1958. Es geht ihnen darum, eine Frauengeneration die Ehre“ zukommen zu lassen, die ihr in den Augen der Autorinnen – den T chtern – zukommt. Wenig redselig‘, wie die meisten waren, wenn es um sie selbst ging, müssen ihre T chter zum Teil sehr mühsam Informationen zusammentragen. Es entsteht ein zum Teil sehr berührendes Panorama von starken und weniger starken Frauen, deren Positionierung zum politischen Kontext ihrer Zeit jedoch vielfach erstaunlich unklar bleibt. The authors attempt to illustrate the lives of their own mothers between the years 1938 and 1958 utilizing short stories, photos, pictures, and poetry. The authors wish to give “honor” to a generation of women that they—the daughters—believe the women deserve. As most of the women were not very “talkative” when it came to their lives, the daughters are forced to compile information, often with much difficulty. Because of this an often very moving panorama of strong and less strong women emerges, however whose position within the political context of the time oft remains surprisingly opaque.
A Coupled Remote Sensing and Simplified Surface Energy Balance Approach to Estimate Actual Evapotranspiration from Irrigated Fields
Gabriel B. Senay,Michael Budde,James P. Verdin,Assefa M. Melesse
Sensors , 2007, DOI: 10.3390/s7060979
Abstract: Accurate crop performance monitoring and production estimation are critical fortimely assessment of the food balance of several countries in the world. Since 2001, theFamine Early Warning Systems Network (FEWS NET) has been monitoring cropperformance and relative production using satellite-derived data and simulation models inAfrica, Central America, and Afghanistan where ground-based monitoring is limitedbecause of a scarcity of weather stations. The commonly used crop monitoring models arebased on a crop water-balance algorithm with inputs from satellite-derived rainfallestimates. These models are useful to monitor rainfed agriculture, but they are ineffectivefor irrigated areas. This study focused on Afghanistan, where over 80 percent ofagricultural production comes from irrigated lands. We developed and implemented aSimplified Surface Energy Balance (SSEB) model to monitor and assess the performanceof irrigated agriculture in Afghanistan using a combination of 1-km thermal data and 250-m Normalized Difference Vegetation Index (NDVI) data, both from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor. We estimated seasonal actual evapotranspiration (ETa) over a period of six years (2000-2005) for two major irrigated river basins in Afghanistan, the Kabul and the Helmand, by analyzing up to 19 cloud-free thermal and NDVI images from each year. These seasonal ETa estimates were used as relative indicators of year-to-year production magnitude differences. The temporal water- use pattern of the two irrigated basins was indicative of the cropping patterns specific to each region. Our results were comparable to field reports and to estimates based on watershed-wide crop water-balance model results. For example, both methods found that the 2003 seasonal ETa was the highest of all six years. The method also captured water management scenarios where a unique year-to-year variability was identified in addition to water-use differences between upstream and downstream basins. A major advantage of the energy-balance approach is that it can be used to quantify spatial extent of irrigated fields and their water-use dynamics without reference to source of water as opposed to a water- balance model which requires knowledge of both the magnitude and temporal distribution of rainfall and irrigation applied to fields.
Altube,Hector A.; Budde,Claudio O.; Ontivero Urquiza,Mónica G.; Rivata,Raquel S.;
Agricultura Técnica , 2001, DOI: 10.4067/S0365-28072001000200004
Abstract: the ripeness of fruit at the time of the harvest constitutes one of the decisive factors in its quality and period of conservation. the objective of this research was to determine the most adequate harvest indexes for peaches (prunus persica l.) cvs. flordaking and san pedro 16-33. acidity decreased significantly, and there was no increment in soluble solids, which is associated with a loss in flavor. of the harvest indexes evaluated, the more representative of maturity were the a* value [cie (1976) l*a*b*] and the firmness, the latter with values of 5.89 kg in flordaking and 4.98 kg in san pedro 16-33, respectively, to assure continued ripening of the picked fruit. correlation and determination coefficients between firmness and ground color in the greenest and the most yellow skin portions were calculated.
DETERMINACIóN DE LOS íNDICES DE COSECHA DE DURAZNOS CVS. FLORDAKING Y SAN PEDRO 16-33 Determination of the harvest indexes in peach trees cvs. Flordaking and San Pedro 16-33
Hector A. Altube,Claudio O. Budde,Mónica G. Ontivero Urquiza,Raquel S. Rivata
Agricultura Técnica , 2001,
Abstract: El estado de madurez de los frutos a la cosecha representa uno de los factores decisivos en su calidad y en su período de conservación. El objetivo del trabajo fue determinar los índices de cosecha más adecuados para duraznos (Prunus persica L.) de los cultivares Flordaking y San Pedro 16-33. La acidez disminuyó significativamente y no aumentaron los sólidos solubles, lo cual se asocia con pérdidas de sabor. De los índices evaluados los más representativos del grado de madurez fueron el valor a* [ CIE (1976) L*a*b*] medido en la zona más verde de la epidermis y la firmeza, esta última con valores de 5,89 kg en Flordaking y 4,98 kg en San Pedro 16-33, para asegurar una maduración organoléptica fuera de la planta. Se calcularon los coeficientes de correlación y determinación entre la firmeza y el color de fondo medidos en las zonas más verde y más amarilla de la piel. The ripeness of fruit at the time of the harvest constitutes one of the decisive factors in its quality and period of conservation. The objective of this research was to determine the most adequate harvest indexes for peaches (Prunus persica L.) cvs. Flordaking and San Pedro 16-33. Acidity decreased significantly, and there was no increment in soluble solids, which is associated with a loss in flavor. Of the harvest indexes evaluated, the more representative of maturity were the a* value [CIE (1976) L*a*b*] and the firmness, the latter with values of 5.89 kg in Flordaking and 4.98 kg in San Pedro 16-33, respectively, to assure continued ripening of the picked fruit. Correlation and determination coefficients between firmness and ground color in the greenest and the most yellow skin portions were calculated.
Die Rede von der Heterogenit t in der Schulp dagogik. Diskursanalytische Perspektiven Speaking about Diversity in School Pedagogics: Discourse Analytical Perspectives Hablando acerca de heterogeneidad en las pedagogías escolares: Perspectivas analíticas del discurso
Jürgen Budde
Forum : Qualitative Social Research , 2012,
Abstract: Der Begriff Heterogenit t erfreut sich innerhalb der Schulp dagogik zunehmender Beliebtheit. Dabei sind seine Funktionen und Eins tze alles andere als gekl rt. Der Beitrag fragt nach dem Diskurs über Heterogenit t anhand der diskursanalytischen Lektüre von thematischen Einleitungen von Sammelb nden. Es geht darum zu analysieren, welche Ordnungsfunktion der Diskurs um Heterogenit t im schulischen Feld hat. Die diskursiven Formationen weisen auf eine spezifische Diskursorganisation hin, die durch Verunklarung, Handlungsaufforderungen und Normativit t gekennzeichnet ist. Differenz wird auf diese Weise de-historisiert, ontologisiert und als individuelle Vielfalt ins diskursive Feld eingesetzt. Dies kann letztendlich in der Unm glichkeit p dagogischen Handelns münden. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1202160 The term diversity [German: "Heterogenit t"] is being increasingly used in school pedagogics; although its functions and applications are far from clear. In this paper I consider the "speaking about heterogeneity" on the basis of a discourse analysis of introductions to anthologies. The ordering functions of the discourse about diversity are analyzed. Discursive formations point at the specific discourse organization, which is characterized by ambiguity, call for action, and normativity. Difference is de-historicized, ontologized, and placed in the discourse as individual plurality. This can lead to making pedagogical interactions impossible. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1202160 El término diversidad ["Heterogenit t" en alemán] se utiliza cada vez más en las pedagogías escolares: aunque sus funciones y aplicaciones son demasiado vagas todavía. En este artículo se considera el "hablar de heterogeneidad" desde las bases del análisis del discurso de introducciones a antologías. Se analizan las funciones de orden del discurso acerca de la diversidad. Las formaciones discursivas apuntan a la organización específica de discursos, la que se caracterizada por la ambigüedad, proclamar a la acción y la normatividad. La diferencia es des- historizada, ontologizada y puesta en el discurso como pluralidad individual. Esto puede conducir a que las interacciones pedagógicas se vuelvan imposibles. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1202160
Modelling reaustenitisation in Fe-C steels with concentration-dependent diffusivity of carbon
Mancini, R.,Budde, C.
Revista de Metalurgia , 2002,
Abstract: A finite difference method used to model reaustenitisation from a ferrite/cementite mixture in Fe-C steels is presented in this paper. Concentration-dependent carbon diffusivity in austenite is taken into account in order to generalize our earlier numerical model. We select some parameters, such as cementite dissolution time, and compare their values as calculated by different approximations available in the literature (in particular at steady state) for planar and spherical geometries. When the dependence of diffusivity on concentration or temperature is increased, the steady state approximation fails to predict correctly the above mentioned parameters and the use of numerical techniques becomes indispensable. En este trabajo se presenta un método numérico de diferencias finitas para modelar la reaustenización en aceros Fe-C a partir de una distribución inicial de ferrita y cementita. Se tiene en cuenta la dependencia de la difusividad en la austenita con la concentración de carbono, a fin de generalizar el propio modelo numérico previo. Se han seleccionado algunos parámetros, como el tiempo de disolución de la cementita, para comparar los valores obtenidos en este caso con los calculados con diferentes aproximaciones (en particular con la de estado estacionario) para los casos de geometrías plana y esférica. Los resultados obtenidos muestran que, cuando la difusividad depende fuertemente de la concentración, la aproximación de estado estacionario no predice correctamente los parámetros calculados y se hace imprescindible la aplicación de métodos numéricos.
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