Doktorafhandling.

Studiens hensikt: Målsettingen med denne studien er å se om manualisert kognitiv gruppeterapi har langtidseffekt i forhold til å redusere vold i nære relasjoner, for menn som frivillig ønsker tilbudet. Metode: Studiet sammenligner type og frekvens av fysisk , psykisk og seksuell vold hos den voldsutøvende mannen, ved hjelp av en utvidet utgave av spørreskjemaet Conflict Tactic Scales ( CTS), versjon Violence Questionnaire (VQ). Voldsatferden registreres før behandling og gjennom denne studien 4 – 7 år etter behandling. Deltakerne har alle fullført Sinnemestring Brøset Modellen (SBM) i tidsrommet 2002 – 2005. I 2009 ble 71 deltakere forespurt og aksepterte å delta i studien. Det var 37 personer som returnerte skjemaet (52.1%), mens det var 34 som ikke svarte. Det er brukt data fra første gangs registrering med CTS som også omhandler demografiske data og spørsmål om voldsutøver selv har blitt utsatt for overgrep i livet. Resultater: Studiet viser en signifikant reduksjon i bruk av vold 4 – 7 år etter å ha fullført SBM. Studiet viser også at deltakerne i stor grad har brukt intervensjonene fra SBM. Oppgaven viser også til sekundære funn hos menn som bruker vold i samliv, som kan være nyttig for videre forskning. Konklusjon: Manualisert kognitiv gruppeterapi for menn som frivillig søker hjelp er en nyttig intervensjon i forhold til vold i nære relasjoner.

No description available.

No description available.

Afhandling, Umeå Universitet. / Med litteraturhenvisninger.

Victimization and hate crimes are becoming more prominent on America's college campuses. Indeed, nearly 20,000 crimes of violence, and over 600 hate crimes, occurred on and around university campuses in 2003 (Department of Education 2004). Given its inverse relationship to crime at the aggregate level, (Sampson et al 1997), one possible means of reversing this trend would be to increase levels of collective efficacy across U.S. campuses. The purpose of this research is to determine if an individual's tolerance of diversity is related to their willingness to intervene in criminal or potentially criminal situations. That is, is tolerance of diversity related to collective efficacy at Virginia Tech? The research on collective efficacy is based on neighborhood level variables. This research, conducted in the "neighborhood" of Virginia Tech, focuses on collective efficacy and tolerance of diversity at the individual level. This research is unique in that it fills gaps in existing literature; to date, no research has analyzed the potential causes of collective efficacy at the individual level. Participants in this study will be asked to complete a survey regarding issues of diversity, tolerance and integration, and sense of belonging to community. The results will then be analyzed in order to gain some insight into this phenomenon. The main questions that will be explored in this research are: Does an individual's sense of belonging to his or her community and tolerance of diversity lead to their willingness to intervene if they see someone doing something wrong? That is, is sense of belonging to community and tolerance of diversity related to collective efficacy? Routine Activities Theory and studies of Collective Efficacy will be used to explore these questions. / Master of Science

The doctoral thesis focuses on a Vold-Kalman filter (VKF). Theoretical part describes properties of VKF and other order tracking methods, namely computed order tracking (COT) and Gabor order tracking (GOT). It also characterizes requirements for rotational speed measurements as one of the key elements for correct functionality of VKF. Practical part depicts own filter implementation and its properties. Main stress is put on computational efficiency, that is in result better than in available codes. Thesis also points out possible issues with numerical instabilities within calculation caused by limited dynamic range of double data type. This is solved by restricting the inputs to prevent the instabilities. Restriction is applied also to cases where the result is numerically correct but unusable. Following part extends the comparison with methods STFT, COT and GOT, where benefits of VKF for nonstationary conditions are shown. The last section shows given information used on simulated signals. This is then applied to show mentioned techniques on experimental data, for instance from turbo engine or electric motor, where the ability of VKF in checking the accordance between speed profile and vibration data is illustrated.

Diss. (sammanfattning) Göteborg: Göteborgs universitet, 2008. / Härtill 4 uppsatser.

No description available.

Conventional rotating machine vibration monitoring techniques are based on the assumption that changes in the measured structural response are caused by deterioration in the condition of the rotating machine. However, due to changing rotational speed, the measured signal may be non-stationary and difficult to interpret. For this reason, the order tracking technique was introduced. One of main advantages of order tracking over traditional vibration monitoring techniques, lies in its ability to clearly identify non-stationary vibration data, and to a large extent exclude the influences from varying rotational speed. Several order tracking techniques have been developed and researched during the past 20 years. Among these techniques, Fourier Transform Based Order Tracking (FT-OT), Angle Domain Sampling Based Order Tracking (AD-OT) and Vold-Kalman Filter Order Tracking (VKF-OT) are the three most popular techniques and have been commercialised in software. While the VKF-OT is comparatively new, and both its theory and application are different from the other two techniques, the unique advantages of this technique has led to increased research attention in this field. This growing interest in research on the application of the VKF-OT technique on real machines, and its comparative advantages with respect to other order tracking techniques, inspired the present research. With this work, a comprehensive literature of electrical machine condition monitoring was surveyed, which gives a broad perspective of electrical machine monitoring methods ranging through electrical techniques, vibration techniques, temperature techniques and chemical techniques. To simply the process of applying VKF-OT in initial investigations, simulated single-degree-of freedom and two-degree-of freedom rotor models were established, and the application of the VKF-OT technique on these simulated models was explored. Because most of the current research draws significantly on an understanding of the VKF-OT theory, it was also necessary to review and summarize the current status of VKF-OT theory from previous work, as well as explore the procedures for selection of its filter bandwidth when dealing with real data. An experimental set-up for monitoring an electrical alternator was constructed. Real experimental data were subsequently used to compare the advantages and disadvantages of the three popular order tracking techniques. The unique time domain advantage of VKF-OT was implemented, using crest factor and kurtosis values as indictors of the fault condition of the machine. This gave encouraging results. / Dissertation (MSc)--University of Pretoria, 2008. / Mechanical and Aeronautical Engineering / unrestricted