Each year, 6.4 million automobile accidents account for approximately 40,000 deaths in the United States. With increasing requirements for automobile safety, computational models capable of simulating organ deformation/ injury during high impact scenarios would be extremely valuable for optimizing safety measures. Accurate experimental data is essential for the accuracy of the models; however, there has been a sparse investigation into high-strain biomechanics which is necessary to address organ/tissue response in high impact scenarios. Damage threshold criterion and damage evolution are other areas that have not been well studied. In vehicular accidents, damage to the liver is the most common cause of death after abdominal injury. High fidelity computational modeling with damage predictor is thus capable of describing liver tissue that is subjected to blunt impact. In this study, we address high strain biomechanics and damage evolution of liver tissue in an effort to generate valuable meaningful FE models.

Emergency managers are faced with the challenge of acting quickly after a hurricane but rarely have detailed information available about type and amount of damage. In response to this need, linear additive geospatial models based on logistic regression analyses of driving variables including wind, rain, surge, topography were developed and automation routines programmed that rapidly and accurately predict a variety of damage types. Since a preponderance of damage is associated with falling trees, over 2000 post-Katrina forested plots were used to fit and validate independent models for hardwood blowdown and pine shear. Additional models using peak wind gusts and maximum sustained winds respectively were fully automated. Most importantly, total model run time was decreased from 36 to 5 hours for the more complicated forest damage models. The models have been vetted by the Mississippi Emergency Management Agency (MEMA) and will be part of MEMA’s hurricane action response plans.

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Disaster damage assessments are a critical component to response and recovery operations. In recent years, the field of remote sensing has seen innovations in automated damage assessments and UAS collection capabilities. However, little work has been done to explore the intersection of automated methods and UAS photogrammetry to detect tornado damage. UAS imagery, combined with Structure from Motion (SfM) output, can directly be used to train models to detect tornado damage. In this research, we develop a CNN that can classify tornado damage in forests using SfM-derived orthophotos and digital surface models. The findings indicate that a CNN approach provides a higher accuracy than random forest classification, and that DSM-based derivatives add predictive value over the use of the orthophoto mosaic alone. This method has the potential to fill a gap in tornado damage assessment, as tornadoes that occur in wooded areas are typically difficult to survey on the ground and in the field; an improved record of tornado damage in these areas will improve our understanding of tornado climatology. / Master of Science / Disaster damage assessments are a critical component to response and recovery operations. In recent years, the field of remote sensing has seen innovations in automated damage assessments and Unmanned Aerial System (UAS) collection capabilities. However, little work has been done to explore the intersection of automated methods and UAS imagery to detect tornado damage. UAS imagery, combined with 3D models, can directly be used to train machine learning models to automatically detect tornado damage. In this research, we develop a machine learning model that can classify tornado damage in forests using UAS imagery and 3D derivatives. The findings indicate that the machine learning model approach provides a higher accuracy than traditional techniques. In addition, the 3D derivatives add value over the use of only the UAS imagery. This method has the potential to fill a gap in tornado damage assessment, as tornadoes that occur in wooded areas are typically difficult to survey on the ground and in the field; an improved record of tornado damage in these areas will improve our understanding of tornado climatology.

No / We have assessed the histological preservation of naturally degraded human hair shafts, and then assayed each for levels of amplifiable mitochondrial DNA and damage-associated DNA miscoding lesions. The results indicate that as sample histology is altered (i.e. as hairs degrade) levels of amplifiable mitochondrial DNA decrease, but no correlation is seen between histology and absolute levels of mitochondrial DNA miscoding lesions. Nevertheless, amplifiable mitochondrial DNA could be recovered across the complete range of the histological preservation spectrum. However, when template copy number is taken into consideration, a correlation of miscoding lesions with histology is again apparent. These relationships indicate that a potential route for the generation of misleading mitochondrial sequence data exists in samples of poor histology. Therefore, we argue that in the absence of molecular cloning, the histological screening of hair may be necessary in order to confirm the reliability of mitochondrial DNA sequences amplified from hair, and thus represents a useful tool in forensic mitochondrial DNA analyses.

A Masters Dissertation submitted to the Department of Speech Pathology and Audiology School of Human and Community Development, Faculty of Humanities University of Witwatersrand Johannesburg, in fulfillment of the requirements for the degree Master of Arts in Speech Pathology, November 2017 / Background: Traumatic Brain Injury (TBI) is a serious public health problem worldwide. It is a major cause of death among younger adults and is a leading cause of lifelong disability in persons who survive it. There are a large number of young adults living with life-long disabilities as a result of traumatic brain injury worldwide, with higher numbers existing in South Africa. Whilst previous research internationally has examined issues of community integration and difficulties experienced by persons with traumatic brain injury and their significant others or caregivers, a paucity of research of this nature exists in South Africa. This study intended to explore whether a gap in clinical practice exists with regard to aspects of intervention and support, underpinned by an ambiguous definition of community integration for survivors of traumatic brain injury and their significant others Method: The main aim of the study was to explore existing feelings of community integration and active participation in patients with traumatic brain injury who have been discharged from rehabilitation services in private practice in Johannesburg, South Africa. In this study, the sample comprised of 10 survivors of TBI and 10 significant others (SOs). The objectives were to describe and compare participants and significant others’ or caregivers experience of community integration and factors that influenced the perceptions by each (i.e. the patient and the caregiver) as well as to document barriers and facilitators to community integration and active participation within the, familial, social and work context. Lastly the study aimed to determine if the qualitative analysis of formal assessment measures (FIM and CIQ-R) match perceptions of persons with TBI with regard to Community Integration (Landrum et al., 1995). Results: Across various areas of comparison, participants who scored higher in the CIQ-Rand FIM measures, often expressed more subtle difficulties or challenges that landed up going undetected and ultimately contributed to their personal feelings of poorer community integration. Various studies, including the current study reveal that significant others have many unmet needs in terms of what they know and what they should expect with regard to handling their loved one with a TBI. Implications: This research has highlighted the fact that our South African context is lacking with regard to ongoing management of individuals surviving TBI, with reduced funding available for outpatient therapies, a lack of post discharge programmes and a general lack of education and information given to family members of TBI survivors upon discharge. As such this should be a major focus of health care providers in the future. This research revealed many subtleties that impact perceptions of community integration but go undetected by formal measures. Such subtleties could be used to direct specialised programmes, which should be made available to TBI survivors post discharge from rehabilitation services. Keywords: traumatic brain injury; community integration; rehabilitation; functional outcomes; private practice, developing countries, community resources, south Africa / XL2018

Pendant de nombreuses années, s’intéresser à la notion de préjudice dans les procédures collectives, ne présentait que peu d’intérêt dans la mesure où celle-ci renvoyait uniquement au préjudice collectif subi par les créanciers du fait de l’ouverture de la procédure, préjudice de référence dans un domaine qui, par définition, fait primer le collectif sur l’individuel. La réparation du préjudice collectif relevait, et continue de relever, de la compétence du mandataire judiciaire chargé, de par la loi, d’assurer la défense de l’intérêt collectif des créanciers.Les différentes évolutions législatives et jurisprudentielles survenues ces dernières années, tendent à remettre en cause l’assimilation au simple préjudice collectif. Cette évolution se manifeste sous plusieurs aspects.Nous pouvons ainsi constater la multiplication des décisions visant à reconnaitre le principe de réparation d’un préjudice personnel subi par un créancier dans le cadre d’une procédure collective, même si l’action n’est pas toujours accueillie au fond. Dans le même temps, la Cour de cassation multiplie les arrêts venant entamer le monopole du mandataire judiciaire qui semblait autrefois absolu. Ainsi, certains préjudices auparavant collectifs, relèvent aujourd’hui de l’initiative individuelle.Parallèlement, l’introduction de certaines réformes en droit français a eu pour conséquence de venir brouiller les limites de la notion de préjudice collectif, autrefois omniprésent, comme par exemple l’Entreprise Individuelle à Responsabilité Limitée et le mécanisme de déclaration d’insaisissabilité qui posent la question de l’aptitude du mandataire judiciaire à agir dans l’intérêt d’un groupe de créanciers.Le but de cette étude est donc de s’interroger sur ce que recouvre cette notion en procédure collective (préjudice collectif, personnel, voire subi par quelques personnes, créancières ou non), d’autant plus que celle-ci ne fait l’objet d’aucune définition. L’analyse du droit positif a permis de constater que le juge se livre à une appréciation en opportunité de l’existence d’un préjudice réparable, quitte à confondre la recevabilité et l’accueil au fond d’une action en justice, en exigeant, dès le stade de la recevabilité, la preuve d’un préjudice réparable. Ce constat nous a amené à proposer une nouvelle hiérarchie de préjudices réparables en procédure collective, fondée sur la qualité du demandeur à l’action, et permettant de prendre en compte les différents types de dommages subis dans cette matière. / For many years, studying the concept of damage in bankruptcy proceedings had little interest since it referred only to the collective damage suffered by the creditors in relation with the opening of the proceedings, such damage being the reference in a field which, by definition, favours the collective to the individual. The compensation of the collective damage used to fall, and continues to fall, within the competence of the court nominee (“mandataire judiciaire” in French) who is legally in charge of the defence of the creditors’ collective interest.The different evolutions of legislation and case law occurred within the latest years tend to question the assimilation to the simple collective damage. This evolution appears under several aspects. Thus we can note the increasing number of decisions acknowledging the principle of compensation for personal injury suffered by a creditor within the framework of bankruptcy proceedings, even if the merits of the legal action are not always admitted by the courts. At the same time, the Supreme Court increases the number of decisions limiting the court nominee’s monopoly, which once seemed absolute. Indeed, certain damages, previously collective, nowadays come within the individual initiative. At the same time, the introduction of certain reforms under French law has, consequently, scrambled the limits of the concept of collective damage, previously omnipresent, as, for example, the “EIRL” (Individual Enterprise with Limited Responsibility) and the system of the unseizability declaration, which question of the ability of the court nominee to act in the interest of a creditor’s group.The purpose of this study is to examine the meaning of this concept in bankruptcy proceedings (collective or personal damage, or even damage suffered by a few persons, creditors or not), all the more so as it is not defined. The analysis of positive law has enabled us to establish that the judge appreciates through opportunity the existence of a damage that may be compensated, even if this leads to a confusion between the admissibility and the granting on the merits of a legal action, by requiring, as early as at the step of the admissibility, the proof of the damage that may be compensated. This observation has led us to propose a new hierarchy of the damages that may be compensated in bankruptcy proceedings, based on the capacity of the plaintiff, and enabling to take into consideration the different types of damages suffered in this field.

The research effort in this thesis is devoted to develop techniques to accurately and rapidly identify the location, orientation, and magnitude of the defects by using structural health monitoring concepts that use Laser Doppler Vibrometer as a non-contact sensor with multi-point sensing capability. The first research area addresses the formulation and validation of an innovative Damage Measure that is based on the ratios of the strain energy distributions of the damaged and undamaged structure. The innovations include use of a single set of actuator/sensor pair to excite and detect the responses of a structure for low frequency vibrations as well as guided wave propagation studies. A second new capability is the estimation of the Damage Measure without requiring any knowledge of the undamaged baseline structure. This method is made possible because of the development of these new technologies: Spatial Decimation and Wavenumber/Frequency filtering. The third contribution is to develop analytical models for the structural dynamics of damaged structure and seek solutions that use perturbation methods to detect damage in a plate structure. The fourth contribution is the development of a comprehensive damage detection technique over a wide frequency dynamic range. The fifth topic of research involves automation in Structural Health Monitoring based on the comprehensive Damage Measure formulation. Under the control of software the Scanning Laser Doppler Vibrometer is used to acquire the low frequency vibration mode data for a coarse identification of all the suspect regions of damage using a threshold criterion on the Damage Measure. Each suspect region of damage is further investigated using the high frequency elastic wave propagation to clearly identify the location, orientation, and extent of the damage. The computer control of the Laser Doppler Vibrometer and a quantitative assessment of the damage provide the enabling technologies for the automation proof of concept. Finally the developed techniques of damage detection are successfully demonstrated on practical structures such as a turbine blade in the laboratory and an F-15 vertical tail in field maintenance conditions