TACA

The airline industry is energy intensive, has high fixed costs and its demand is very sensitive to the economic cycle. After the industry worldwide undergoes deregulation, starting with the United States in 1978, two distinct business models develop. Traditional carriers operate hub and spoke networks, offer onboard service and engage in price discrimination, whereas low cost carriers operate point to point, charge for all services and have simple tariffs. TACA begins operations in Central America in 1931 and, by 1943, has a footprint that extends from the United States to Argentina. In 1998–2001 TACA faces increased competition and a significant market downturn. In 2004 TACA CEO Roberto Kriete launches Centroamérica Fácil to stimulate air traffic in the airline\u27s base countries

Barnes Hospital Record

https://digitalcommons.wustl.edu/bjc_barnes_record/1058/thumbnail.jp

New Test Set for Video Quality Benchmarking

A new test set design and benchmarking approach (US Patent pending) allows a standard observer to assess the end-to-end image quality characteristics of video imaging systems operating in day time or low-light conditions. It uses randomized targets based on extensive application of Photometry, Geometrical Optics, and Digital Media. The benchmarking takes into account the target’s contrast sensitivity, its color characteristics, and several aspects of human vision such as visual acuity and dynamic response. The standard observer is part of the extended video imaging system (EVIS). The new test set allows image quality benchmarking by a panel of standard observers at the same time. The new approach shows that an unbiased assessment can be guaranteed. Manufacturers, system integrators, and end users will assess end-to-end performance by simulating a choice of different colors, luminance levels, and dynamic conditions in the laboratory or in permanent video systems installations

La financiacion de la Renta Basica, un modelo de microsimulacion

Financing is one of the areas of Basic Income defined as an income paid by the State to each full member or accredited resident of a society, regardless of whether he or she wishes to engage in paid employment, or is rich or poor or, in other words, independently of what any other sources of income might be, and irrespective of cohabitation arrangements in the domestic sphere research where most progress has been made in the last ten or twelve years and interesting work has been done with different geographic zones in mind, showing how Basic Income can be paid by several kinds of public institutions. The present research is based on a micro-simulation program that was applied to a database compiled from a sample of 110,474 tax declarations in Catalonia in order to evaluate different policy options for tax-benefit integration, which would include a Basic Income. The study demonstrates that the proposal is viable in economic terms and that the impact of the distribution of income would be highly progressive. With due database changes and adjustments according to the fiscal reality of each place, the measure can be applied in many countries.basic income

Electronic Procurement of Pharmaceuticals and Medical Devices in Chile: An Initial Empirical Investigation

The return on investments in electronic procurement platforms has been elusive. We show that the use of an electronic platform for the procurement of pharmaceuticals and medical devices has saved the Government of Chile money. Using a unique data set that covers purchases of the same items before and after the new Chilecompra platform was introduced in 2004 and includes controls for other variables that may have affected prices, we find that Chilecompra saved the government over 8% and that greater aggregation of purchases saved a further 3%. Consistent results are found when government prices are compared with those of Chile’s three drugstore chains. Chilecompra has resulted in quantifiable economic benefits which are related to volume and platfom effects rather than a greater number of competitors. These results help fill a gap in the literature on the returns to Information Technology investment, and are consistent with work in Health Economics

Study of authentication mechanisms in distributed applications

In this project I have carried out a study on token-based authentication and I have developed a system based on micro services that consists of three servers. Users are authenticated using the JSON WEB SIGNED standard. This standard uses a JSON format that has three blocks: a header, a payload and a signature. Create two JSONs in the first two parts, and encode them in Base64 separated by a point. Then it uses all this string of characters to create a digital signature, using public / private key encryption to create the signature, which also encodes it in Base64. A token is an encoded string, following this pattern: headerOnBase64.payloadOnBase64.signatureOnBase64 The result is a string like this: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c The front-end is developed with React-Redux and written in TypeScript. Trying to be the maximum of fidelity to functional programming.En este proyecto he realizado un estudio sobre la autenticación basada en tokens y he desarrollado un sistema basado en microservicios que consta de tres servidores. Los usuarios se autentican utilizando el estándar JWS JSON WEB SIGNED. Este estándar utiliza un formato de JSON que consta de tres blocs: un header, un payload y un signature. Crea dos JSON en las dos primeras partes, y las codifica en Base64 separadas por un punto. Después utiliza toda esta cadena de caracteres para crear una firma digital, utilizando encriptación de clave pública / privada para crear la signature, que también la codifica en Base64. Un token es una cadena codificada, siguiendo este patrón: headerOnBase64.payloadOnBase64.signatureOnBase64 El resultado es una cadena como esta: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c El front-end está desarrollado con React-Redux y escrito en TypeScript. He intentado ser fiel a la programación funcional.En aquest projecte he realitzat un estudi sobre l?autenticació basada en tokens i he desenvolupat un sistema basat en microserveis que consta de tres servidors. Els usuaris s?autentifiquen utilitzant l?estàndard JWS JSON WEB SIGNED. Aquest estàndard utilitza un format de JSON que consta de tres blocs: header, payload i signature. Crea dos JSON de les dues primeres parts, i les codifica en Base64 separades per un punt. Després utilitza tota aquesta cadena per crear una firma digital, utilitzant encriptació de clau pública / privada que serà la signature, i també és codificada en Base64. Un token és una cadena codificada, seguint aquest patró: headerOnBase64.payloadOnBase64.signatureOnBase64 El resultat és una cadena com aquesta: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c La part del front-end està feta amb React-Redux i escrita amb TypeScript. He intentat ser el màxim de fidel a la programació funcional

Automatic Summarization of Soccer Highlights Using Audio-visual Descriptors

Automatic summarization generation of sports video content has been object of great interest for many years. Although semantic descriptions techniques have been proposed, many of the approaches still rely on low-level video descriptors that render quite limited results due to the complexity of the problem and to the low capability of the descriptors to represent semantic content. In this paper, a new approach for automatic highlights summarization generation of soccer videos using audio-visual descriptors is presented. The approach is based on the segmentation of the video sequence into shots that will be further analyzed to determine its relevance and interest. Of special interest in the approach is the use of the audio information that provides additional robustness to the overall performance of the summarization system. For every video shot a set of low and mid level audio-visual descriptors are computed and lately adequately combined in order to obtain different relevance measures based on empirical knowledge rules. The final summary is generated by selecting those shots with highest interest according to the specifications of the user and the results of relevance measures. A variety of results are presented with real soccer video sequences that prove the validity of the approach

Comparison of different methods of spatial disaggregation of electricity generation and consumption time series

Es wird eine Methode zum Vergleich von Regionalisierungsabläufen von Last- und Erneuerbare-Energien-Daten in Übertragungsnetzen vorgestellt. Die Methode wird dann auf den Vergleich von 8 Modellen des deutschen Übertragungsnetzes angewendet. Diese Arbeit war Teil des MODEX-Net-Projekts