no abstract provided / Thesis / Master of Science (MSc)

This paper describes a three part analysis to characterize the interaction between the female upper extremity and a helicopter cockpit side airbag system and to develop dynamic hyperextension injury criteria for the female elbow joint. Part I involved a series of 10 experiments with an original Army Black Hawk helicopter side airbag. A 5th percentile female Hybrid III instrumented upper extremity was used to demonstrate side airbag upper extremity loading. Two out of the 10 tests resulted in high elbow bending moments of 128 Nm and 144 Nm. Part II included dynamic hyperextension tests on 24 female cadaver elbow joints. The energy source was a drop tower utilizing a three-point bending configuration to apply elbow bending moments matching the previously conducted side airbag tests. Post-test necropsy showed that 16 of the 24 elbow joint tests resulted in injuries. Injury severity ranged from minor cartilage damage to more severe joint dislocations and transverse fractures of the distal humerus. Peak elbow bending moments ranged from 42.4 Nm to 146.3 Nm. Peak bending moment proved to be a significant indicator of any elbow injury (p=0.02) as well as elbow joint dislocation (p=0.01). Logistic regression analyses were used to develop single and multivariate injury risk functions. Using peak moment data for the entire test population, a 50% risk of obtaining any elbow injury was found at 56 Nm while a 50% risk of sustaining an elbow joint dislocation was found at 93 Nm for the female population. These results indicate that the peak elbow bending moments achieved in Part I are associated with a greater than 90% risk for elbow injury. Subsequently, the airbag was re-designed in an effort to mitigate this as well as the other upper extremity injury risks. Part III assessed the enhanced side airbag module to ensure injury risks had been reduced prior to implementing the new system. To facilitate this, 12 enhanced side airbag deployments were conducted using the same procedures as Part I. Results indicate that the re-designed side airbag has effectively mitigated elbow injury risks induced by the original side airbag design. It is anticipated that this study will provide researchers with additional injury criteria for assessing upper extremity injury risk caused by both military and automotive side airbag deployments. / Master of Science

Results from two-station surface-wave inversions across the Archean Kaapvaal craton of southern Africa are compared with seismic velocities estimated from approximately 100 mantle xenoliths brought to the surface in kimberlite pipes. As the xenoliths represent a snapshot of the mantle at the time of their eruption, comparison with recently recorded seismic data provides an opportunity to compare and contrast the independently gained results. These cratonic xenoliths from the southern Kaapvaal, all less than 100Ma in age, have been analyzed geothermobarometrically to obtain the equilibrium P-T conditions of the cratonic mantle to about 180km depth [James et al 2004]. Seismic velocity-depth and density-depth profiles calculated on the basis of these P-T data and the mineral modes of the xenoliths are used to produce theoretical surface-wave dispersion curves and to generate roughly the upper 200km of a starting/reference model. A regionally-developed crustal structure [Niu and James 2002] was used for the crust and 300km of mantle values taken from PREM filled in down to 500km depth. This composite model was used as the starting/reference model for a Neighbourhood Algorithm surface-wave inversion using fundamental-mode Rayleigh-wave phase velocities for 16 paths within the Kaapvaal Craton from five events. The velocity structures found by that inversion are consistent with those derived from the xenolith data. Hence the velocity structure (i.e. thermal structure) of the mantle to a depth of 180km beneath the Kaapvaal craton is basically the same today as it was 80-90Ma. Further, synthetics runs show that for this surface-wave dataset, there is no strong low-velocity zone at depths shallower than at least 200km. / Master of Science

ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Wallops Flight Facility is NASA’s principal site for management and implementation of suborbital research programs. Recently, WFF resumed its successful satellite-launching history without sacrificing its culture of being low-cost and responsive. Part of what made this possible is the GPS radiosonde. During recent successful Minotaur I launches, this tiny instrument provided upper-air observations that were used in six categories of analysis necessary for such launches: toxics, blast, winds aloft, debris, weather and forecasting, and post-flight. In addition, the GPS radiosonde has reduced costs associated with Wind Weighting at Wallops, and is used in numerous range research projects.

Most manual wheelchair users will experience upper extremity injury and pain during their lifetime, which can be partly attributed to the high load requirements, repetitive motions and extreme joint postures required during wheelchair propulsion. Recent efforts have attempted to determine how different propulsion techniques influence upper extremity demand using broad measures of demand (e.g., metabolic cost). However studies using more specific measures (e.g., muscle stress), have greater potential to determine how altering propulsion technique influences demand. The goal of this research was to use a musculoskeletal model with forward dynamics simulations of wheelchair propulsion to determine how altering propulsion technique influences muscle demand. Three studies were performed to achieve this goal. In the first study, a wheelchair propulsion simulation was used with a segment power analysis to identify muscle functional roles. The analysis showed that muscles contributed to either the push (i.e. delivering handrim power) or recovery (i.e. repositioning the hand) subtasks, with the transition period between the subtasks requiring high muscle co-contraction. The high co-contraction suggests that future studies focused on altering transition period biomechanics may have the greatest potential to reduce upper extremity demand. The second study investigated how changing the fraction effective force (i.e. the ratio of the tangential to total handrim force, FEF) influenced muscle demand. Simulations maximizing and minimizing FEF both had higher muscle work and stress relative to the nominal simulation. Therefore, the optimal FEF value appears to balance increasing FEF with minimizing upper extremity demand and care should be taken when using FEF to reduce demand. In the third study, simulations of biofeedback trials were used to determine the influence of cadence, push angle and peak handrim force on muscle demand. Although minimizing peak force had the lowest total muscle stress, individual stresses of many muscles were >20% and the simulation had the highest cadence, suggesting that this variable may not reduce demand. Instead minimizing cadence may be most effective, which had the lowest total muscle work and slowest cadence. These results have important implications for designing effective rehabilitation strategies that can reduce upper extremity injury and pain among manual wheelchair users. / text

Introduktion Den 1 december 2016 trädde en ändring av årsredovisningslagen (ÅRL, SFS 1995:1554) i kraft vilken innebär att stora företag ska upprätta en hållbarhetsredovisning från och med räkenskapsår efter den 31 december 2016. Påtagliga brister har uppmärksammats i hållbarhetsrapporternas innehåll efter utredningar av det första rapporteringsåret 2017, trots försöket att öka öppenheten. Flera studier har undersökt hållbarhetschefens effekt på hållbarhetsarbetet, däremot har få studier fokuserat på huruvida hållbarhetschefers egenskaper och roller påverkar innehållet och mängden redovisning i hållbarhetsrapporterna. Syfte Syftet är att förklara hur hållbarhetschefers olika egenskaper och roller påverkar innehåll och mängd i svenska noterade företags hållbarhetsrapporter. Metod En kvantitativ tvärsnittsstudie har genomförts på svenska noterade bolag med en anställd hållbarhetschef. Studien utgår från en deduktiv ansats där hypoteser formulerades med hjälp av Upper Echelon Theory, legitimitetsteori, institutionell teori samt tidigare studier. Datainsamlingen har samlats in genom en dokumentsstudie. Mängden operationaliserades till antal sidor och hållbarhetsrapporternas innehåll med hjälp av en checklista, där elva indikatorer från Global Reporting Initiative (GRI) användes för att bedöma innehållet. Slutsats Studien hittade ett signifikant samband att företag med hållbarhetschefer som suttit en längre tid på posten påverkar innehållet positivt i hållbarhetsrapporterna. Ett signifikant negativt samband hittades även mellan hållbarhetschefer med annat ansvar och innehållet i hållbarhetsrapporterna, det vill säga att innehållet påverkas negativt av att hållbarhetschefen har ett annat ansvar (HR, kommunikation eller marknad) utöver hållbarhet. Om hållbarhetschefen sitter i ledningen finner denna studie inget samband med att innehållet blir bättre i hållbarhetsrapporterna. Resultatet visade att hållbarhetschefers egenskaper och roller inte påverkar mängden redovisning i hållbarhetsrapporterna. / Introduction On December 1st 2016, the Swedish regulation regarding mandatory sustainability reporting was legislated for large companies, starting with financial years after December 31st 2016. The legislation is the first step for companies to be more transparent towards the society. Despite the initiatives, investigations have shown deficiencies in the content of the sustainability reports in the first reporting period. Earlier studies have focused on how sustainability managers affect the sustainability activities. However, only a few studies have focused on how the sustainability managers characteristics and roles affect the number of pages and the content of the sustainability reports.      Aim The aim is to explain how sustainability managers’ characteristics and roles affect the content and number of pages ofSwedish listed companies’ sustainability reports.   Method This study has a quantitative approach with a cross-cultural design and focused on Swedish listed companies with an employed sustainability manager. A deductive approach was used to formulate hypothesis from Upper Echelon Theory, legitimacy theory, institutional theory and earlier studies. This study used archival data in order to collect information about the variables. The variable content was operationalized through a checklist method where eleven GRI-indicators was used to determine the content of the sustainability report.  Conclusion If a sustainability manager has held the position for a longer time, it positively influences the content of the sustainability reports. Furthermore, if the sustainability manager has another responsibility than sustainability issues (HR, communication or marketing) it negatively influences the content of the sustainability reports. If the sustainability manager is a part of the management team, this study finds that it has no effect on the content in the sustainability reports. Sustainability managers’ characteristics and roles does not affect the number of pages in the sustainability report.

En mettant l'accent sur la résilience des Présidents Directeur Généraux, cette thèse contribue au courant de recherche « upper echelons » et met en lumière une capacité, qui est cruciale en période d’incertitude, de changement rapide et de pression. Adoptant un format en trois essais (deux essais empiriques et un essai théorique), elle questionne l’influence et la diffusion de cette résilience au plus haut niveau. Afin de contextualiser mes travaux, je propose tout d'abord une revue de littérature des contributions « upper echelons » ayant trait aux caractéristiques des dirigeants et des recherches afférentes au concept de résilience. Le premier essai documente ensuite l’impact de la résilience des dirigeants sur la performance de leur entreprise et corrobore l’existence d’une relation curvilinéaire de forme concave, relation modérée par de niveau de réserve financière de l’entreprise et le niveau de complexité de son secteur d’activité. Le second essai corrobore l’existence d’une relation curvilinéaire de forme convexe entre résilience du dirigeant et degré de dynamisme stratégique et établit le rôle de médiateur de ce-dernier dans la relation résilience du dirigeant-performance de l’entreprise. Le troisième essai, de nature conceptuelle, propose un modèle de diffusion interne et externe de la résilience du dirigeant en temps de crise. Dans le chapitre de conclusion de ma thèse, après avoir souligné quelques limites de mon approche et proposé des pistes de recherche, je fournis quelques implications managériales de mes travaux. / Focusing on CEO resilience, this dissertation contributes to the upper echelons or strategic leadership research tradition and highlights a capacity, which is crucial in times of uncertainty, rapid change and pressure. Adopting a three essay format (two empirical and one theoretical pieces), it questions the influence of CEO resilience. The first chapter contextualises my work by reviewing previous "upper echelons" contributions pertaining to CEO characteristics and resilience literature. The first essay then investigates the impact of CEO resilience on firm performance and demonstrates the existence of a bell shape curvilinear relationship, relationship moderated by financial slack and industry complexity. The second essay confirms the existence of a U shape curvilinear relationship between CEO resilience and strategic dynamism and establishes the mediating role of strategic dynamism in the CEO resilience-company performance sequence. The third essay, which is conceptual, provides a model for internal and external diffusion of CEO resilience in times of crisis. Finally the concluding chapter of my thesis stresses some limitations, proposes future research avenues, and put forward some managerial implications.

Upper Klamath Lake in southern Oregon has two species of lacustrine suckers, Lost River sucker Deltistes luxatus and shortnose sucker Chasmistes brevirostris that were historically abundant. Results of surveys performed in the mid-1980's indicated that populations of both species were declining and ageing with apparent recruitment failure in most years since 1970. In 1988 both species were listed as endangered species and high priority has been placed on investigating recruitment of Upper Klamath Lake suckers. Lapilli are the preferred otolith for ageing suckers. Lapilli form predictably on the day of hatch, have the most conservative morphology of the three otoliths, and deposit easily discernable increments that begin on the day of hatch and proceed daily, and grow in a predictable relationship with somatic growth. Ages estimated by otolith analysis and resulting hatch dates of young-of-the-year Lost River sucker and shortnose sucker were consistent annually and consistent with reported spawning period for suckers from Upper Klamath Lake. Otolith increment analysis is necessarily lethal, whereas scale circuli analysis is not lethal. My findings suggest that scale circuli count is an inefficient estimator of daily Daily age estimates for age in young-of-the-year Lost River sucker and shortnose sucker. any given circuli count varied by approximately 51 days in Lost River sucker and 30 days Additionally, my results do not accurately predict the size or age at in shortnose sucker. which scales are formed, thereby invalidating an assumption of age and growth models. Consequently, scale circuli analysis cannot be used to produce accurate estimates of age or growth for young-of-the-year Lost River sucker and shortnose sucker. Lost River sucker and shortnose sucker achieve a relatively large size by the autumn of their first year, consistent with other members of Catostomidae. Interspecific difference in growth rates was evident in each year with Lost River sucker exhibiting faster growth than shortnose sucker in each year. Abundance of young-of-the-year suckers does not appear to be strongly correlated to somatic growth rate, though hatch date and environmental parameters are highly correlated with abundance. In both Lost River sucker and shortnose sucker, in years with the highest abundance (1991 and 1993), the mean hatch dates of surviving fish were later than in years with the lowest abundance. Also, young-of-the-year Lost River sucker and shortnose sucker experienced wide environmental fluctuations in Upper Klamath Lake as seasonal limnological and climatic variation create a dynamic habitat for young suckers. Water temperature, precipitation, air temperature, and minimum lake elevation are all strongly correlated to abundance of young-of-the-year suckers. / Graduation date: 1999

Thesis (Ph.D.)--Texas Christian University, 2006. / Title from dissertation title page (viewed Feb. 8, 2007). Includes abstract. Includes bibliographical references.

This thesis describes two main projects; the first one is the optimization of a hierarchical search strategy to search for unknown pulsars. This project is divided into two parts; the first part (and the main part) is the semi-coherent hierarchical optimization strategy. The second part is a coherent hierarchical optimization strategy which can be used in a project like Einstein@Home. In both strategies we have found that the 3-stages search is the optimum strategy to search for unknown pulsars. For the second project we have developed a computer software for a coherent Multi-IFO (Interferometer Observatory) search. To validate our software, we have worked on simulated data as well as hardware injected signals of pulsars in the fourth LIGO science run (S4). While with the current sensitivity of our detectors we do not expect to detect any true Gravitational Wave signals in our data, we can still set upper limits on the strength of the gravitational waves signals. These upper limits, in fact, tell us how weak a signal strength we would detect. We have also used our software to set upper limits on the signal strength of known isolated pulsars using LIGO fifth science run (S5) data. / Diese Dissertation besteht aus zwei Projekten: Im ersten Projekt wird die Optimierung einer hierarchischen Strategie zum Auffinden von 'unbekannten' Pulsaren beschrieben. Der erste Teil besteht dabei aus einer semi-kohärenten und der zweite Teil aus einer kohärenten Optimierungsstrategie, wie sie in Projekten wie Einstein@Home verwendet werden kann. In beiden Ansätzen erwies sich eine 3-Stufensuche als optimale Suchstrategie für 'unbekannte' Pulsare. Für das zweite Projekt entwickelten wir eine Software für eine kohärente Multi-IFO (Interferometer Observatory) Suche. Zum Validieren der Software verwendeten wir sowohl simulierte Daten als auch Hardware induzierte Signale von Pulsaren aus dem vierten 'LIGO Science run' (S4). Wir erwarten nicht, mit der aktuellen Empfindlichkeit unserer Detektoren echte GW- Signale aufzunehmen, können jedoch obere Grenzen für die Stärke der Gravitationswellen-Signale bestimmen. Diese oberen Grenzen geben uns an, wie schwach ein gerade noch detektierbares Signal werden kann. Ferner benutzten wir die Software um eine obere Grenze für bekannte, isolierte Pulsare zu bestimmen, wobei wir Daten aus dem fünften 'LIGO Science run (S5) verwendeten.