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  • 2010-2014  (29)
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  • 1
    Publication Date: 2016-09-29
    Description: This paper discusses the potential contribution of employing school effectiveness methodological approach within the ongoing research debate on school choice issues. Using the first approach, we estimate the effectiveness of a sample of Chilean schools after controlling by a baseline at the student level. In order to avoid the endogeneity of such a baseline with respect to the school effect, we use a longitudinal data set (SIMCE 2004 and SIMCE 2006) from which a natural pseudo-experiment is defined in such a way that the baseline is by design uncorrelated with the school effect. Thereafter, we investigate possible relationships between parental school choice (as declared in public standardized surveys) and the schools classified by their effectiveness. The main conclusions of this paper are, on the one hand, that there is not remarkable difference between municipal (public) and subsidised schools in terms of their effectiveness analyzed under value-added; and, on the other hand, that there is no relation between parental school choice preferences and school effectiveness.
    Keywords: I20 ; ddc:330 ; school choice ; private-public schools ; value-added ; Schule ; Privatschule ; Auswahl ; Chile
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: English
    Type: doc-type:article
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  • 2
    Publication Date: 2019-01-15
    Description: The ongoing globalisation process has not put an end to international financial crises. On the contrary, it seems to have contributed to their appearance and to accentuating their degrees of unpredictability. In this context, the main objective of the present study is to establish whether the values of the best-known and most widely used country risk indexes, namely, the Euromoney index and the International Country Risk Group (ICRG), and the values of their representative variables could have forecasted well in advance the crises that took place between 1994 and 2002, a period which is herein termed the "globalisation era". The results show that, although the selected indexes and their representative variables were able to identify certain vulnerabilities, they could not accurately identify the political, economic, and/or financial factors that developed prior to these crisis episodes.
    Keywords: G01 ; F36 ; ddc:650 ; globalisation and uncertainty ; financial crises forecast ; country risk indexes ; representative variables
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: English
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  • 3
    Publication Date: 2019-01-15
    Description: What factors influence consumers to choose a bank with which to contract a service in a situation of information asymmetry? In this situation the firm has more information than consumers, and this fact generates consumer uncertainty due to a possible firm opportunistic behaviour. To reduce it, consumers can use, on one hand, signals that the bank sends to the market, such as reputation, and on the other hand, they can seek for more informal information, such as positive word-of-mouth communication from relatives and friends, to generate or increase trust, and through this variable, to develop an intention o contract with a specific bank and not others. Relations among those variables were tested with a sample of 155 bank users when they have not still worked with a specific bank. Results indicate the importance both of the reputation signal and of the positive information received of acquaintances and relatives to trust, but with differences according to the level of perceived ex ante uncertainty moderate those relations.
    Keywords: M31 ; ddc:650 ; bank ; trust ; reputation ; uncertainty ; word-of-mouth
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: Spanish
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  • 4
    Publication Date: 2019-07-13
    Description: Mars Science Laboratory (MSL) will use the Skycrane architecture to execute final descent and landing maneuvers. The Skycrane phase uses closed-loop feedback control throughout the entire phase, starting with rover separation, through mobility deploy, and through touchdown, ending only when the bridles have completely slacked. The integrated ADAMS simulation described in this paper couples complex dynamical models created by the mechanical subsystem with actual GNC flight software algorithms that have been compiled and linked into ADAMS. These integrated simulations provide the project with the best means to verify key Skycrane requirements which have a tightly coupled GNC-Mechanical aspect to them. It also provides the best opportunity to validate the design of the algorithm that determines when to cut the bridles. The results of the simulations show the excellent performance of the Skycrane system.
    Keywords: Mechanical Engineering
    Type: IEEE Aerospace Conference; 3-10 Mar. 2012; Big Sky, MT; United States
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  • 5
    Publication Date: 2019-07-13
    Description: On August 5, 2012, the Mars Science Laboratory (MSL) mission successfully delivered the Curiosity rover to its intended target. It was the most complex and ambitious landing in the history of the red planet. A key component of the landing system, the requirements for which were driven by the mission ambitious science goals, was the Guidance, Navigation, and Control (GN&C) system. This paper will describe the technical challenges of the MSL GN&C system, the resulting architecture and design needed to meet those challenges, and the development process used for its implementation and testing.
    Keywords: Lunar and Planetary Science and Exploration; Spacecraft Instrumentation and Astrionics
    Type: AAS/AIAA Spaceflight Mechanics Meeting; 10-14 Feb. 2013; Kauai, HI; United States
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  • 6
    Publication Date: 2019-07-13
    Description: The Mars Science Laboratory project recently places the Curiosity rove on the surface of Mars. With the success of the landing system, the performance envelope of entry, descent and landing capabilities has been extended over the previous state of the art. This paper will present an overview to the MSL entry, descent and landing system design and preliminary flight performance results.
    Keywords: Lunar and Planetary Science and Exploration; Space Transportation and Safety
    Type: AAS 13-236 , Space Flight Mechanics Meeting; 10-14 Feb. 2013; Kauai, HI; United States
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  • 7
    Publication Date: 2019-07-13
    Description: The Mars Science Laboratory project recently landed the Curiosity rover on the surface of Mars. With the success of the landing system, the performance envelope of entry, descent, and landing capabilities has been extended over the previous state of the art. This paper will present an overview of the MSL entry, descent, and landing system, a discussion of a subset of its development challenges, and include a discussion of preliminary results of the flight reconstruction effort.
    Keywords: Astronautics (General)
    Type: AAS 13-123 , Space Flight Mechanics Meeting; 10-14 Feb. 2013; Kauai, HI; United States
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  • 8
    Publication Date: 2019-07-13
    Description: The Powered Flight segment of Mars Science Laboratory's (MSL) Entry, Descent, and Landing (EDL) system extends from backshell separation through landing. This segment is responsible for removing the final 0.1% of the kinetic energy dissipated during EDL and culminating with the successful touchdown of the rover on the surface of Mars. Many challenges exist in the Powered Flight segment: extraction of Powered Descent Vehicle from the backshell, performing a 300m divert maneuver to avoid the backshell and parachute, slowing the descent from 85 m/s to 0.75 m/s and successfully lowering the rover on a 7.5m bridle beneath the rocket-powered Descent Stage and gently placing it on the surface using the Sky Crane Maneuver. Finally, the nearly-spent Descent Stage must execute a Flyaway maneuver to ensure surface impact a safe distance from the Rover. This paper provides an overview of the powered flight design, key features, and event timeline. It also summarizes Curiosity's as flown performance on the night of August 5th as reconstructed by the flight team.
    Keywords: Spacecraft Design, Testing and Performance; Lunar and Planetary Science and Exploration
    Type: AAS 13-424 , AAS/AIAA Spaceflight Mechanics Meeting; 10-14 Feb. 2013; Kauai, HI; United States
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  • 9
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Spacecraft Design, Testing and Performance
    Type: International Planetary Probe (IPPW-8) Workshop; 6-10 Jun. 2011; Norfolk, VA; United States
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  • 10
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Spacecraft Design, Testing and Performance
    Type: International ESA Conference on Guidance and Navigation Control Systems; 5-10 Jun. 2011; Carlsbad; Czechoslovakia
    Format: text
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