Intermittent transport in edge plasmas

The properties of low-frequency convective fluctuations and transport are investigated for the boundary region of magnetized plasmas. We employ a two-dimensional fluid model for the evolution of the global plasma quantities in a geometry and with parameters relevant to the scrape-off layer of confined toroidal plasmas. Strongly intermittent plasma transport is regulated by self-consistently generated sheared poloidal flows and is mediated by bursty ejection of particles and heat from the bulk plasma in the form of blobs. Coarse grained probe signals reveal a highly skewed and flat distribution on short time scales, but tends towards a normal distribution at large time scales. Conditionally averaged signals are in perfect agreement with experimental measurements.Comment: 12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France

Benefit-Cost Analysis of Accelerated Study in Associate Programs (ASAP) of the City University of New York (CUNY)

This study evaluates CUNY’s Accelerated Study in Associate Programs (ASAP) from a benefit-cost perspective. ASAP is designed to accelerate degree completion within three years at community colleges. This report builds on the CUNY evaluations of ASAP, which provide consistent evidence for the dramatic success of ASAP on increasing the timely completion of associate degrees. Although ASAP requires more resources per student than the traditional associate program, the cost per graduate was found to be lower because of its much higher effectiveness in producing graduates. The benefit-cost analysis of ASAP enables us to calculate the monetary costs and benefits of this intervention with particular emphasis on the financial returns to the taxpayer. We estimate the benefits arising from higher tax revenues and lower costs of spending on public health, criminal justice, and public assistance and compare them with the required investment for ASAP. The estimates show that there are large financial returns on ASAP investment for the taxpayer and for the students in the program. In all cases, the benefits exceeded the costs. For each dollar of investment in ASAP by taxpayers, the return was between three and four dollars and around twelve dollars for each dollar invested by the individuals, suggesting that ASAP is a very productive public and private investment. When applied to the much higher ability of ASAP to produce high graduation rates, the overall returns to the taxpayer are impressive. A cohort of 1,000 students enrolled in ASAP would generate fiscal benefits for the taxpayer of more than $46 million beyond those of investing an approximately equal amount in the conventional degree program. This is a very substantial monetary return for this educational intervention

Cost-effectiveness of Accelerated Study in Associate Programs (ASAP) of the City University of New York (CUNY)

Although community colleges enroll almost half of the students engaged in postsecondary education, they have poor success in student completion of degrees. Nationally it appears that less than a quarter of community college students obtain the two-year associate degree, and the success rate is even lower in urban community colleges. In response, the City University of New York (CUNY) evaluated the obstacles to degree completion and responded by establishing the Accelerated Study in Associate Programs (ASAP). ASAP attempts to assist students in overcoming financial, academic, and scheduling difficulties that undermine degree attainment. An early evaluation of ASAP students over three years found that in comparison with a matched group of students in six community colleges of CUNY, the graduation rates doubled from about a quarter of students completing to more than half. But ASAP does require additional financial resources. The purpose of this study was to undertake a cost-effectiveness analysis to see if the additional costs were compensated by a higher graduation rate sufficient to justify those costs. The cost of producing an additional graduate in the comparison group without ASAP was compared with the cost when ASAP was provided. The conclusion is that ASAP is so much more effective in producing additional graduates in a timely fashion and that the cost per graduate for ASAP is comparable to or less than that of the traditional approach. ASAP can increase considerably the number of CUNY community college graduates while actually reducing costs

Las Finanzas^cAnálisis de la solvencia financiera y el cumplimiento de obligaciones de la empresa G & P,S.A. para el periodo 2011-2012.

En el siguiente trabajo se efectuó un Análisis Financiero el cual se requiere para determinar las condiciones de la solvencia financiera de la Compañía, y así obtención de un financiamiento para cumplir todas las obligaciones de la empresa. Por lo tanto se tomara los estados financieros de los años 2011-2012 y se procederá a hacer un examen exhaustivo utilizando las razones financieras de liquidez, rentabilidad, endeudamiento así se tendrá elementos necesarios para la toma de decisiones La empresa G & P paso por un procedimiento de análisis, y se generó cifras que determinaron la liquidez de la empresa, lo cual si posee liquidez para contraer obligaciones y efectuar financiamientos su giro a generado ganancias, lo que pasa es que con respecto al año anterior a decaído, se habla de una empresa que su principal giro es el financiamiento por lo cual es importante reconocer que los clientes y Recuperación de Cartera es de suma importancia para la determinación de la entidad. En la comparación de los Estados Financieros se muestra que la empresa ha disminuido sus actividades, pero esto no significa que se encuentre mal. Esto se podrá comprobar en el Análisis Vertical lo que el flujo de efectivo de Balance General con respecto a total de disponibilidade

Methodology for detection of paroxysmal atrial fibrillation based on P-Wave, HRV and QR electrical alternans features

The detection of Paroxysmal Atrial Fibrillation (PAF) is a fairly complex process performed manually by cardiologists or electrophysiologists by reading an electrocardiogram (ECG). Currently, computational techniques for automatic detection based on fast Fourier transform (FFT), Bayes optimal classifier (BOC), k-nearest neighbors (K-NNs), and artificial neural network (ANN) have been proposed. In this study, six features were obtained based on the morphology of the P-Wave, the QRS complex and the heart rate variability (HRV) of the ECG. The performance of this methodology was validated using clinical ECG signals from the Physionet arrhythmia database MIT-BIH. A feedforward neural network was used to detect the presence of PAF reaching a general accuracy of 97.4%. The results obtained show that the inclusion of the information of the P-Wave, HRV and QR Electrical alternans increases the accuracy to identify the PAF event compared to other works that use the information of only one or at most two of them

Tracking performance for long-lived particles at LHCb

The LHCb experiment is dedicated to the study of the $c-$ and $b-$hadron decays, including long-lived particles such as $K_s$ and strange baryons ($\Lambda^0$, $\Xi^-$, etc... ). These kind of particles are difficult to reconstruct by the LHCb tracking system since they escape detection in the first tracker. A new method to evaluate the performance of the different tracking algorithms for long-lived particles using real data samples has been developed. Special emphasis is laid on particles hitting only part of the tracking system of the new LHCb upgrade detector.Comment: Proceeding for Connecting the Dots and Workshop on Intelligent Trackers (CTD/WIT 2019