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No description available.

No description available.

No description available.

L’essor fulgurant des cryptomonnaies au cours des dernières années a propulsé à l’avant-plan la chaîne de blocs auprès du public. Exploitant l’anonymat et la décentralisation du système, les acteurs dans le monde criminel ont profité de la commodité de ces devises pour faciliter leurs activités. Compte tenu de leur popularité récente, les principes en droit criminel demeurent embryonnaires et la littérature peu développée à ce sujet. Ce mémoire vise à déterminer s’il existe une attente raisonnable de vie privée à l’égard de la chaîne de blocs et des cryptomonnaies. À travers une analyse prospective des fondements de l’article 8 de la Charte canadienne entourant les fouilles et les perquisitions, nous exposerons le cadre juridique applicable à l’égard de ces technologies. En raison de ses caractéristiques intrinsèques, la garantie juridique ne s’applique pas aux données répertoriées sur la chaîne de blocs. Cependant, la protection s’étend aux portefeuilles de cryptomonnaie étant donné la nature sensible de leur contenu. Nous examinerons finalement les différents mandats applicables lors d’une saisie de ces actifs. / Over the last few years, the rapid growth of cryptocurrencies has brought blockchain to the forefront of the public. Harnessing the network’s anonymous and decentralized power, criminals have been using cryptocurrencies to facilitate their activities. However, owing to its recent surge in popularity, principles within criminal law are still undergoing development and the existing literature on the subject remains thin. This thesis aims to determine whether there is a reasonable expectation of privacy in blockchain and cryptocurrencies. Through a prospective analysis of the general principles on search and seizure, we will outline the analytical framework applicable to these technologies. Due to its intrinsic characteristics, the Canadian Charter does not confer protection to data stored on blockchain. However, the scope extends to cryptocurrency wallets due to its sensitive nature. We will also discuss the general and specific warrants used during a seizure of these assets.

Text in Afrikaans / "Free people expect much from their police. In such societies the police stand at the point of balance on the one hand securing human rights on the other exercising their lawful powers given to them by Governments in the name of the people, to protect people and their institutions" (J Alderson Human Rights and Police Rights. Publication of the Council of Europe.) This is no small expectation. It means that the police are expected to maintain and secure the principles of democracy and human rights, the principles upon which our Constitution is based. At the same time it is the duty of a police service to maintain law and order which sometimes require the exercise of power and the use of force which on the face of it may appear to violate human dignity and certain rights and freedoms which a police force is expected to maintain in a democratic society. The manner of exercising that power has an impact on the credibility and effectiveness of the police. Human rights law internationally accepts that a police service needs to be given the power to, at times restrict certain individual freedoms in the interests of the security of the community at large. These restrictions may take place only in a constitutional way. If it takes place in an unconstitutional way the courts must have the right to exclude evidence which is unconstitutionally obtained. At this stage the courts have to formulate such a qualified exclusionary rule, but the ultimate goal must be to include such an exclusionary rule in a future Constitution. / Department of Criminal & Procedural Law / LL.M.

The problem encountered by the researcher was that the South African Police Service Cyber-Crimes Unit is experiencing problems in seizing computer evidence. The following problems were identified by the researcher in practice: evidence is destroyed or lost because of mishandling by investigators; computer evidence is often not obtained or recognised, due to a lack of knowledge and skills on the part of investigators to properly seize computer evidence; difficulties to establish authenticity and initiate a chain of custody for the seized evidence; current training that is offered is unable to cover critical steps in the performance of seizing computer evidence; computer seizure as a technique requires specialised knowledge and continuous training, because the information technology industry is an ever-changing area. An empirical research design, followed by a qualitative research approach, allowed the researcher to also obtain information from practice. A thorough literature study, complemented by interviews, was done to collect the required data for the research. Members of the South African Police Cyber-crime Unit and prosecutors dealing with cyber-crime cases were interviewed to obtain their input into, and experiences on, the topic. The aim of the study was to explore the role of computers in the forensic investigation process, and to determine how computers can be seized without compromising evidence. The study therefore also aimed at creating an understanding and awareness about the slippery nature of computer evidence, and how it can find its way to the court of law without being compromised. The research has revealed that computer crime is different from common law or traditional crimes. It is complicated, and therefore only skilled and qualified forensic experts should be used to seize computer evidence, to ensure that the evidence is not compromised. Training of cyber-crime technicians has to be priority, in order to be successful in seizing computers. / Department of Criminology / M.Tech. (Forensic Investigation)

Traumatic brain injury (TBI), a leading cause of death and disability in the United States, causes potentially preventable damage in part through the dysregulation of neural calcium levels. This dysregulation likely affects the activity of the calcium-sensitive phosphatase, calcineurin, with serious implications for neural function. To test this possibility, the present study characterized the role of calcineurin in a rat model of brain trauma, the lateral fluid percussion injury model. Golgi-Cox histochemistry revealed an acute post-TBI loss and delayed overgrowth of dendritic spines on principal cortical cells. The spine loss appeared to require calcineurin activity, since administering a calcineurin inhibitor, FK506, 1 hour after TBI prevented the spine loss. Additional experiments showed how calcineurin activity might be related to the spine loss. Specifically, Western blots and enzyme activity assays revealed an acute increase in the cortical activity of calcineurin and its downstream effector, the actin-depolymerizing protein, cofilin. The cofilin activation was blocked by the same FK506 treatment that prevented spine loss, suggesting a relationship between cofilin activation and spine loss. To investigate long-term consequences of calcineurin activation after TBI, rats were administered FK506 (Tacrolimus) 1 hour after TBI and then monitored for spontaneous seizure activity months later. Acute post-TBI treatment with FK506 reduced the frequency of late non-convulsive seizures but did not prevent late convulsive seizures, cortical atrophy, or thalamic damage. The results of the present study implicate calcineurin in the acute dendritic remodeling and late non-convulsive seizures that occur after TBI. Importantly, these findings reveal calcineurin as a potential therapeutic target in the treatment of TBI and its sequalae.

STÁRKOVÁ, Zuzana, Development of financial literacy, Prague, 2012. Zuzana Stárková - Charles University in Prague - Husitská teologická fakulta. Supervisor, Prof. PhDr. Beáta Krahulcová, CSc. Main topic of the diploma thesis is financial literacy, more specifically the risk of its consequences. First part of the thesis deals with definition of financial literacy, its causes and consequences. Next chapters are devoted to monetary literacy, ignorance of which causes many problems in the area of credits, loans and subsequently may lead to indebtedness. This part of the text defines important key words, whose knowledge in essential for using of banking services and products Last chapters of the theoretical part introduce the Consumer Protection Act and the issues of seizures and insolvency. Main objective of the practical part of the thesis is to carry out a research among university students in order to summarize the level of their awareness, knowledge and experience in the financial area.

Le développement de nouvelles technologies permettant d’obtenir des procédés de fabrication novateurs, de même que l’utilisation de nouveaux matériaux et lubrifiants, ont rendu possible une amélioration globale de l’efficacité des systèmes mécaniques et la résolution de nombreuses défaillances. Néanmoins, certains types de détérioration comme le grippage restent difficiles à appréhender car ils résultent de nombreux paramètres connexes tels que le régime de lubrification, la température du contact et le coefficient de frottement. Le grippage est un phénomène qui apparait de manière brutale et qui se caractérise par des arrachements et des transferts de matières entre les surfaces en contact pouvant aller jusqu’à la destruction complète du système. Ce dernier est généralement associé à une mauvaise dissipation des calories entrainant des températures de contact élevées. De nombreux critères basés sur la dissipation d’énergie dans le contact ont été établis sans pour autant que l’un d’eux ne soit unanimement reconnu par la communauté scientifique. La première partie de cette étude a consisté à caractériser le comportement en frottement d’un couple matériau-lubrifiant grâce à l’utilisation d’une machine bi-disque. En parallèle, une modélisation thermique de ce banc d’essais a été réalisée en utilisant la méthode des réseaux thermiques. Les corrélations entre les formules analytiques et les mesures expérimentales ont permis d’aboutir à l’établissement d’une loi de frottement liant conditions de contact et température de masse des éprouvettes. Il a aussi pu être démontré que la température de masse des disques pouvait être considérablement différente de la température d’injection du lubrifiant en fonction des conditions opératoires. Ce résultat permet une analyse nouvelle des critères de grippage dont la plupart assimilent la température des éprouvettes à celle d’injection du lubrifiant. Malgré cela, les différents essais de grippage réalisés montrent que l’unique considération de la température de contact pour établir un critère de grippage s’avère insuffisante. / The development of new technologies, which allow innovative manufacturing processes, as well as the use of new materials and lubricants have led to an overall improvement of mechanical systems efficiency and reliability. However some failures, like scuffing, remain difficult to understand since they depend on many related parameters such as the lubrication regime, the contact temperature and the friction coefficient. Scuffing is a critical damage that appears suddenly and which is characterised by local welds and scratches between the sliding surfaces. It can lead to complete destruction of the mechanical system. This phenomenon is in general related to poor heat dissipation and overheating resulting in high contact temperature. Numerous studies were conducted in order to establish a scuffing criterion based on energetic approach. But none of them is unanimously recognized by the scientific community. The first part of this study consisted in characterizing the frictional behaviour of a given couple of lubricant and material thanks to the use of a twin-disc machine. In a second part, a thermal modelling of this test bench has been realised using the thermal network methodology. Correlations between analytical formulas and experimental measurements allowed to establish a friction law relating contact conditions and disc bulk temperature. It has also been demonstrated that the disc bulk temperature could be considerably different from the lubricant injection temperature depending on the operating conditions. This result allows a new interpretation of existing scuffing criteria, which for most of them consider the disc temperature to equal the oil temperature. Despite this analysis, the scuffing experiments performed reveal that accounting solely for the contact temperature is not sufficient to establish a reliable scuffing criterion.