The following diploma thesis deals with the management of asynchronous motor revolutions by a frequency converter MICROMASTER 440 via the programmable controller S7-200. At the beginning, I researched the company documentation of Siemens, which is the producer of the frequency converter and the programmable controller mentioned above. As my work proceeded, I also started to study the company documentation of Mitsubishi Electric, which produces the operating pannel. The first part of my thesis provides a general description of the stated devices and the second part deals with the solution of the task itself. My task was to design a way of communication between the converter and the controller. I chose a USS protocol via serial port RS-485. The operation of the controller was performed by using an operating terminal type GOT1000 which was connected to the controller. In summary, my diploma thesis primarily deals with the construction of an operating programme for the controller and with creating of a graphical control on the terminal. In the end, I evaluated the knowledge gained during the work on this subject and suggested further procedures.

When the famous African-American actor and singer Paul Robeson played the lead in Shakespeare's Othello in London in 1930, tickets were in high demand during the production's first week. The critical response, however, was less positive, although the reviews unanimously praised his bass-baritone delivery. When Robeson again played Othello on Broadway thirteen years later, critics praised not only his voice but also his acting, the drama running for 296 performances. My argument concerning Robeson uses elements first noted by Henri Lefebvre in his seminal work, The Production of Space, while I also draw on Paul Connerton's work on commemorative practices. Using spatial and memorial theories as a backdrop for examining his two portrayals, I suggest that Robeson's nascent geopolitical awareness following the 1930 production, combined with his already celebrated musical voice, allowed him to perform the role more dramatically in 1943.

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Syftet med denna uppsats var att redogöra för det förebyggande arbetet kring hot och våld men också hantering av hot och våld i gymnasieskolan. Därmed användes en kvalitativ intervjustudie med rektorer, lärare samt en kurator som gav svar på följande frågeställningar; hur förebyggdes hot och våld i gymnasieskolan, hur identifierades hot och våld i gymnasieskolan samt hur bemöttes hot och våld i gymnasieskolan. Personalens svar på dessa frågeställningar analyserades utifrån Paulo Freires befrielseteori och därmed gavs en tydligare bild av skolans situation gällande hot och våld. Medvetandegöra-(conscientização) innebar att handlingsplanerna kritiskt reflekterades över som uppdaterades årsvis samt granskning av elevenkäter och medarbetarenkäter. I arbetslaget samtalades och delades erfarenheter som var en del i att hot och våld medvetandegjordes. Förutom i arbetslaget delades olika erfarenheter genom föreläsningar, litteratur och poddar, vilket ökade kunskapen om hot och våld. Eleverna diskuterade värdegrunden, normer och de förtryckta samt förtryckarnas världsbild. Därtill fick elever kännedom om den hjälp som fanns såsom kurator, socialtjänst och utväg om de hamnade i en våldsam eller hotfull situation. Det förebyggande arbetet kring hot och våld sammanfattades i följande strategier: skapandet av en trygg arbetsmiljö samt ökning av elevers och lärares kunskap. Dessutom behövdes både teoretiska och praktiska kunskaper om hur elever och lärare skulle agera vid hotfulla och våldsamma situationer. Olika handlingsplaner tillämpades vid olika hotfulla och våldsamma situationer. Vid övning av inrymning förbereddes lärare och elever hur de skulle agera vid våldsamma och hotfulla situationer. Dessutom behövdes kännedom om vilka aktörer som fanns inom skolan såsom elevhälsoteam, som oftast bestod av kurator, psykolog och skolläkare. Därutöver bestod en krisgrupp av andra professioner såsom pastor, diakon, mentor, präst eller imam. I samhället fanns det vid större katastrofer och olyckor stöd och råd från socialtjänsten och POSOM-gruppen att tillgå. Begrepp: Hot och våld medvetandegjordes, i skola, i nära relationer, i hemmet, barn for illa, elevhälsoteam, Krisgrupp, Socialtjänsten, Polisen, POSOM-gruppen / The purpose of this essay was to account for the preventive work on threats and violence but also the management of threats and violence in high school. Thus, a qualitative interview study was used with principals, teachers and a counselor´s who provided answers to the following questions; how threats and violence were prevented in high school, how threats and violence   were indentified in high school and how threats and violence in high school were adressed. The staff´s answers to these questions were analyzed on the basis of Paulo Freire´s liberation theory and thus gave a clearer picture of school´s sitaution regarding threats and violence. Awareness-raising (conscientização) meant that the action plans were critically reflected on, which were updated annually, as well as a review of student surveys and employee surveys. The work team discussed and shared experinces that were part of raising awareness of threats and violence. In addition to the work team, different experiences were shared through lectures, litterature and podcasts, which increased knowledge about threats and violence. The students discussed the values, norms and the world of oppressed and the opressors. In addition, students become aware of the help that was available, such as a counselor, social services and a resort if they ended up in a violent or threatening situation.  The preventive work on threats and violence was summarized in the following strategies: the creation of safe working environment and an increase students and teachers knowledge. In addition, both theoretical and practical knowledge was needed about how students and teachers should act in threatening and violent situations. Different action plans were applied in different threatning and violent situations. When practicing accomodation, teachers and students were prepared to act in violent and threatening situations. In addition, knowledge was needed about which actors were present within the school, such as student health teams, which usually consisted of a counselors, psychologists and school doctor. In addition, a crisis group consisted of other professions such as pastor, deacon, mentor, priest or imam. In the event of major disasters and accidents, support and advice from the social services and the POSOM group were availible. Concepts: Threats and violence were made aware, in school, close relationships, at home, children got hurt, student health team, Crisis-group, Social services, Police, POSOM group