The thesis is focused on analysis of polysomnographic signals based on extraction of chosen parameters in time, frequency and time-frequency domain. The parameters are acquired from 30 seconds long segments of EEG, EMG and EOG signals recorded during different sleep stages. The parameters used for automatic classification of sleep stages are selected according to statistical analysis. The classification is realized by artificial neural networks, k-NN classifier and linear discriminant analysis. The program with a graphical user interface was created using Matlab.

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Thesis (MBA)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: PSG Investment Bank started out of the PSG Group in 1998. It was a successful enterprise that was rated highly by the public, institutions and employees. Through 1999, there was a struggle on executive level over the strategy that PSG Investment Bank should follow. The struggle culminated in 2000 with the resignation of the founder of PSG Investment Bank. The remaining executives put their strategy in action during 2000 and 2001. External factors made the environment difficult during late 2001 and 2002 and PSG Investment Bank was not able to respond in such a way that it could ensure its own survival. PSG Investment Bank was sold to Absa in August 2002, resulting in PSG Investment Bank's closure and delisting in 2003. This study examines the strategy of PSG Investment Bank through its life according to a model for strategic management put forward by Burger (2000). The vision of PSG Investment Bank, the external environment that influenced PSG Investment Bank and the internal environment of PSG Investment Bank are analysed as well as the strategic issues and options utilised by PSG Investment Bank. The conclusion of the study is that PSG Investment Bank faced a tough external environment that needed a strong internal environment to be able to survive. By not managing the most important internal resources, the employees, correctly, management lost the ability to ride out the storm brought about by the external circumstances and were left with few strategic options but to sell PSG Investment Bank. / AFRIKAANSE OPSOMMING: PSG Beleggingsbank is in 1998 uit die PSG Groep gebore. Dit was 'n hoogs suksesvolle onderneming wat deur die publiek, institusies en werknemers gerespekteer is. Deur die loop van 1999 was daar 'n stryd op topbestuursvlak oor die strategie wat PSG Beleggingsbank moes volg. Hierdie stryd het in 2000 die bedanking van die stigter van PSG Beleggingsbank tot gevolg gehad. Die oorblywende bestuurders het hulle strategie gedurende 2000 en 2001 in werking geplaas. Eksterne faktore het die omgewing moeilik gemaak gedurende laat 2001 en 2002 en PSG Beleggingsbank kon nie daarin slaag om sodanig op te treë om sy eie oorlewing te verseker nie. PSG Beleggingsbank is in Augustus 2002 aan Absa verkoop wat veroorsaak het dat PSG Beleggingsbank gedenoteer is en sy deure tydens 2003 gesluit is. Hierdie studie ondersoek die strategie van PSG Beleggingsbank deur die loop van die onderneming se lewe aan die hand van 'n model vir strategiese bestuur soos voorgestel deur Burger (2000). Die visie van PSG Beleggingsbank, die eksterne omgewing wat PSG Beleggingsbank beïnvloed het en die interne omgewing binne PSG Beleggingsbank sowel as die strategiese kwessies en keuses wat PSG Beleggingsbank uitgevoer het, word bestudeer. Die slotsom van die studie is dat PSG Beleggingsbank 'n moeilike eksterne omgewing ondervind het wat 'n sterk interne omgewing benodig het om in te oorleef. Deur nie sy belangrikste interne hulpbron, sy werknemers, reg te bestuur nie, het die bestuur die vermoë verloor om die storm wat deur eksterne faktore veroorsaak is, uit te sit en het met min strategiese opsies oorgebly anders as om PSG Beleggingsbank te verkoop.

Trötthet i trafiken är ett stort problem i samhället. Det är särskilt farligt att trött framföra tunga lastbilar i trafiken eftersom dessa fordon är stora och har ofta livsavgörande roller vid inblandning i trafikolyckor. För att angripa problemet har det i denna rapport studerats kring vilket sömnstadie som är lämpligast att vakna under, i syfte att vakna pigg och alert samt vilka typer av tekniker och metoder som är lämpliga för att portabelt kunna detektera Rapid-Eye-Movement. Tidigare arbeten och studier har gjorts som påvisar att uppväckning i REM-sömn är optimalt för att känna sig alert. De valda metoderna är baserade på varianter av väletablerade tekniker som används för identifiering av sömnsteg. Elektrookulografi används för att mäta ögonrörelser med hjälp av fyra elektroder som är placerade på huvudet. Kroppsrörelser upptäcks genom en accelerometer som fästs på armen. Pulsmätningar görs och används för att räkna ut pulsvariansen under sömnen. Målet är att skapa en prototyp som ska känna av när användaren är i REM-sömn och sedan väcka användaren. Detta arbete är uppdelat i två inbyggda system som görs mellan två olika examensarbeten. Resultatet blev tre sensorer som fungerar individuellt. På grund av tidsbrist och en längre felsökning blev prototypen inte färdigställd. Innan sensorerna kan tillämpas i en produkt krävs det att ytterligare tester genomförs under monitorering av en sömnspecialist. / Tiredness in traffic is a major problem in society. It is especially dangerous to drive heavy trucks when tired because these vehicles are large and often have vital roles when involved in traffic accidents. To address the problem, this degree project has studied which sleep stage is most appropriate to wake up during, in order to wake up sharp and alert, and what types of techniques and methods are suitable for portable detection of Rapid-Eye-Movement. Previous work and studies have been done which indicates that awakening during REM sleep is optimal for feeling alert. The chosen methods are based on variants of well-established techniques that are used to identify sleep stages. Electrooculography is used to measure eye movements using four electrodes placed on the head. Body movements are detected by an accelerometer attached to the arm. Pulse measurements are made and used to calculate the pulse variation during sleep. The goal is to create a prototype which will know when the user is in REM sleep and then wake the user up. This work is divided into two embedded systems that are made between two different degree projects. The result was three sensors that worked individually. Due to lack of time and a longer troubleshooting, the prototype was not completed. Before the sensors can be used in a product, additional tests are required under the supervision of a sleep specialist.

Acid maltase deficiency (AMD) is a rare autosomal recessive genetic disorder that results in an accumulation of glycogen in the lysosomal storage vacuoles. It is classified as a glycogen storage disease (type II) and is also known as Pompe's disease. The prognosis of the patient with AMD is poor and the main cause of death is respiratory failure. We report a female patient whose respiratory insufficiency was documented to occur most severely during rapid eye movement sleep and who benefited clinically from the institution of nocturnal noninvasive bilevel positive airway pressure.

Football violence was a rare phenomenon in France until the nineteen eighties. Harsh economic times coupled with the challenges of unemployment brought a different type of fanatic to football stadia. To vent their frustration about the economic difficulties of their time, some fans found an easy scapegoat: the increasing number of African immigrants in France. These fans, known as hooligans, have become organized and can be found supporting most major French football clubs, disrupting what once was a relatively tranquil national pastime. This thesis traces their development in France, looks at what they borrowed from Italian and English fan groups, and suggests how their organization is now uniquely French.