To increase aerodynamic performance, the geometric porosity of a ringsail spacecraft parachute canopy is sometimes increased, beyond the "rings" and "sails" with hundreds of "ring gaps" and "sail slits." This creates extra computational challenges for fluid--structure interaction (FSI) modeling of clusters of such parachutes, beyond those created by the lightness of the canopy structure, geometric complexities of hundreds of gaps and slits, and the contact between the parachutes of the cluster. In FSI computation of parachutes with such "modified geometric porosity," the flow through the "windows" created by the removal of the panels and the wider gaps created by the removal of the sails cannot be accurately modeled with the Homogenized Modeling of Geometric Porosity (HMGP), which was introduced to deal with the hundreds of gaps and slits. The flow needs to be actually resolved. All these computational challenges need to be addressed simultaneously in FSI modeling of clusters of spacecraft parachutes with modified geometric porosity. The core numerical technology is the Stabilized Space--Time FSI (SSTFSI) technique, and the contact between the parachutes is handled with the Surface-Edge-Node Contact Tracking (SENCT) technique. In the computations reported here, in addition to the SSTFSI and SENCT techniques and HMGP, we use the special techniques we have developed for removing the numerical spinning component of the parachute motion and for restoring the mesh integrity without a remesh. We present results for 2- and 3-parachute clusters with two different payload models. We also present the FSI computations we carried out for a single, subscale modified-porosity parachute.

abstract: Principle-based ethical frameworks, which commonly make use of codes of ethics, have come to be the popular approach in guiding ethical behavior within scientific research. In this thesis project, I investigate the benefits and shortcomings of this approach, ultimately to argue that codes of ethics are valuable as an exercise in developing a reconciled value profile for a given research community, and also function well as an internal and external proclamation of values and norms. However, this approach results in technical adherence, at best, and given the extent to which scientific research now irreversibly shapes our experience as human beings, I argue for the importance of cultivating ethical virtues in scientific research. In the interest of doing so I explore concepts from Aristotelian virtue ethics, to consider how to ameliorate the shortcomings of principle-based approaches. This project was inspired by a call to research and develop an ethical framework upon which to found a cooperative research network that would be aimed at combating the spread of emerging and re-emerging infectious diseases in resource-restricted countries, specifically throughout Latin America. The desire to found this network on an ethics-based framework is to move beyond technical compliance and cultivate a research community committed to integrity, therefore establishing and maintaining trust and communication that will allow for unprecedented productive collaboration and meaningful outcomes. I demonstrate in this thesis that this requires more than a code of ethics, and use this initiative as a case study to exhibit the merit of integrating concepts from virtue ethics. / Dissertation/Thesis / Masters Thesis Biology 2017

The thesis focuses on European countries which underwent so-called partial democratization in the last quarter of the 20th century. It starts from the polemic with Mansfield and Snyder who claim that a (partial) democratization leads to war. The development in Europe of the last quarter of the 20th century, however, seems to contradict this notion. The aim of the thesis is, thus, to contribute to the debate of war-proneness of democratizing states by answering the following question: What caused that the democratization did not lead to war in many cases? Due to the nature of the research question as well as to the number of cases (i.e. 20) the method applied here is qualitative comparative analysis using the so-called fuzzy set method. The application of this method as such is a secondary aim of the thesis. Possible causal conditions of the absence of war which are under study here also derive mostly from the conclusions made by Mansfield and Snyder. The main focus is put on the so-called golden parachute. Among other causes are strong institutions - conceptualized here as weak and weakened executive, political integration into international community, duration of independent statehood and at least some experience with democracy - and developed economy - conceptualized through GDP, economic...

Målet med detta examensarbete var att undersöka och ta fram ett konstruktionsförslag av en bärgningsmodul anpassad för Saabs robotsystem, RBS15, vilket skulle möjliggöra återanvändning av komponenter och underlätta utvärderingar av flygkroppen. Liknande system används av andra företag inom försvarsindustrin för att kunna utvärdera sina produkter. I examensarbetet har olika aspekter av bärgningssystemet undersökts, inklusive analys av fallskärmsinitiering, dimensionering av fallskärmar och infästningspunkter, samt packningsstudier av fallskärmsystemet. Litteraturstudier, intervjuer och simuleringar har använts som lösningsmetoder för att analysera och modellera systemet och dess komponenter. Beräknade krafter och flygbana visade att de befintliga spanten och infästningspunkterna på roboten klarade belastningen från fallskärmssystemet. Slutsatsen är att en bärgningsmodul till RBS15 har stor potential. Med detta system skulle roboten kunna återanvändas och utvärderas effektivt, vilket kan leda till ekonomiska fördelar och underlätta framtida utveckling av systemet. / The objective of this thesis was to investigate and develop a design proposal for a recovery module for Saab's missile system, RBS15, which would enable component reusability and facilitate evaluations of the missile. Similar systems are utilized by other companies in the defense industry to assess their products. The thesis project has explored various aspects of the recovery system, including parachute initiation analysis, dimensioning of parachutes with their affiliated attachment points, and packing studies of the parachute system. Literature reviews, interviews, and simulations have been employed as methods to analyze and model the system and its components. Calculated forces and flight trajectory demonstrate that the existing frames and attachment points on the missile can withstand the load from the parachute system. The conclusion is that a recovery module for RBS15 holds significant potential. With this system, the missile could be effectively reused and evaluated, which can lead to economic benefits and facilitating future system development.

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ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / The development and qualification of personnel and cargo aerial delivery parachute systems present unique challenges to the instrumentation and data analysis engineers. Some of the areas that must be addressed include: a) system must be low in cost, b) system often has to be operated on ranges that have limited telemetry or other range instrumentation and support (i.e. commercial skydiving centers), c) system is often rigged and operated by parachute support personnel and test jumpers rather than instrumentation engineers, and d) system must be able to be reconfigured in the field to support a variety of test card requirements during a typical test day, e) data must be available for review and the system be prepared for the next test within a few minutes of parachute recovery, and f) system must withstand ground impact velocities as high as 50 ft/sec (15.24 m/sec) without damage. This paper describes such a system as it is being used for the development and qualification testing of a number of parachute systems for sport skydiving, military personnel, as well as cargo parachute systems. This modular system has been developed as a result of previous experience in other parachute development and qualification projects to address the need for a flexible Data Acquisition System (DAS) system that meets the above requirements. This paper describes some of the tools used to meet these requirements.

This study investigates how Korean Parachute Kids perform academically in their schools and what social factors contribute to Korean Parachute Kids' academic performance. Korean children who came to the U.S. for educational purposes without their parental supervision are called `Korean Parachute Kids'. They have several characteristics: most of them come from high SES families, their parents have high expectations of their children and force them to go to the U.S., Korean Parachute Kids are pressured to attend Ivy League colleges, and their parents tend to compensate for their absence with money or presents. Korean Parachute Kids who come to the United States without their parents encounter many problems, both academically and socially. Many Korean Parachute Kids struggle to adjust and face academic failure due to language barriers, cultural differences, and the different curricula in the U.S. This failure occurs even though acquiring an education is the reason for Korean Parachute Kids' stay in the U.S. and is what their parents have invested exorbitant amounts of money. In light of the absence of their parents, many Korean Parachute Kids' behaviors go unchecked, which may, in turn, cause these children to be maladjusted in many aspects of their school lives. Korean parents' high expectation for their children's academic success is regarded as one of the factors that cause their children to misbehave. Research is needed in order to inform Korean parents and Korean and U.S. society about the academic and social implications of early study abroad for Korean children. Guidelines should also be provided in order for Korean parents to discern what the good and bad aspects of early study abroad in the U.S. are for their children. This research will also be beneficial to educators in America in that they will be aware of Korean Parachute Kids' academic and social difficulties in school since the number of Korean Parachute kids who study in the U.S. continues to increase. / Urban Education

This paper addresses the issue of security and integration of UAVs in air traffic operations and analyses possible risks. This work defines methodology to demonstrate airworthiness of the parachute recovery system under extreme climatic conditions. The first part of the methodology deals with the compliance performance requirements in external environment and the second part verifies performance parachute canopy. Methodology developed herein is subsequently verified by practical tests on parachute recovery system Galaxy GBS 10.