Nanofiltration is a proper way of preparation of drinking water. The process has a lot in common with reverse osmosis where a semipermeable membrane is used to separate a pure water flow from the remaining water. A pilot plant was used to ensure that nanofiltration is a suitable technology for a specific waterworks station in Glemmingebro, Ystad. The purpose was also to find out if a pH-adjustment is needed for feed water in a possible full scale plant.  In this case nanofiltration is used mainly to remove sulphate and calcium since the raw water contains concentrations of these substances which exceed the limits for potable water. It is important to receive a high recovery (RC), otherwise the deliviery of water won?t be high enough.

It is important to construct or recreate different types of wetlands and study their retention of nutrients, since knowledge of their effectiveness in this matter is poor. In 2003 a wetland was constructed on an old meadow on the western shore of Lake Bornsjön in central Sweden. The main purpose of the wetland was to reduce the amount of phosphorus entering the lake, which is the back-up water supply for Stockholm when the city cannot obtain water from Lake Mälaren. Large areas around Lake Bornsjön consist of agricultural land and the nutrient concentrations in the inflows to the lake are usually relatively high (approx. 1 mg/l total nitrogen and 0.05-0.1 mg/l total phosphorus).

The purpose of this study is to explore and understand the social and structural dynamics of an organization working with questions regarding development. The organization in question is Vi-agroforestry, a Swedish based NGO that works around the lake Victoria basin and the focus will be on their office in Rwanda. I have used a qualitative approach and conducted participatory observation as well as semi-structured interviews to gather data. I have emanated from the individuals in the organization by using a theory of microsociological organisationperspecive to understand how the employees create and is created by the existing social structures. (Blomberg, 2003) Even though the office in Rwanda only is a relatively small part of Vi-agroforestry?s operations it is still highly individual and independent from the rest of the organization.

A design methodology to mitigate timing problems due to long wire delays is proposed. The timing problems are taking care of at architecture level instead of layout level in this design method so that no change is needed when the whole design goes to backend design. Hence design iterations are avoided by using this design methodology. The proposed design method is based on STARI architecture, and a novel initialization mechanism is proposed in this paper. Low frequency global clock is used to synchronize the communication and PLLs are used to provide high frequency working clocks.

Syftet med studien var att undersöka hur människor upplever och hanterar risken att bli utsatt för hot och våld från klienter i arbetet. En kvalitativ ansats valdes vilket innebär att fokus har lagts på subjektiva upplevelser och erfarenheter av studieområdet. Studien genomfördes gentemot Socialtjänsten från två kommuner och urvalet bestod av intervjuer med elva socialsekreterare vars arbete innehåller myndighetsutövning och kontakt med klienter. Analys av data gjordes enligt induktiv tematisk analys. Resultaten visade att det föreligger en risk att bli utsatt för hot och våld av klienter men den upplevs vara liten.

En modern grafikprocessor är oerhört kraftfull och har en prestanda som potentiellt sett är många gånger högre än för en modern mikroprocessor. I takt med att grafikprocessorn blivit alltmer programmerbar har det blivit möjligt att använda den för beräkningstunga tillämpningar utanför dess normala användningsområde. Inom det här arbetet utreds vilka möjligheter och begränsningar som uppstår vid användandet av grafikprocessorer för generell programmering. Arbetet inriktas främst mot signal- och bildbehandlingstillämpningar men mycket av principerna är tillämpliga även inom andra områden.Ett ramverk för bildbehandling implementeras och några algoritmer inom bildanalys realiseras och utvärderas, bland annat stereoseende och beräkning av optiskt flöde. Resultaten visar på att vissa tillämpningar kan uppvisa en avsevärd prestandaökning i en grafikprocessor jämfört med i en mikroprocessor men att andra tillämpningar kan vara ineffektiva eller mycket svåra att implementera..

This master thesis was conducted during the spring of 2014 at Atlas Copco Rock Drills AB in Örebro. The purpose of the thesis was to develop a simulation model of the rotation system for a hydraulic rock drill. In the future, the model will be used to investigate the phenomena called ?jerky rotation?. In order to validate the simulation model a test bench was designed and tests were made.

Bakgrund: Investeringen kännetecknas av att någon, företag eller privatperson, avsäger sig möjlighet till konsumtion idag för ökad konsumtion i framtiden. Den är en faktor som kan öka företagets värde och det är därför viktigt att rätt investering väljs. Investeringskalkyleringen ger företaget värdefull information om en investering. De vanligaste kalkylmetoderna är NPV, IRR, payback och diskonterad payback. Payback är en särskilt intressant metod av två anledningar.

This thesis describes a system for dealing with free surface fluid simulations, and the components needed in order to construct such a system. It builds upon recent research, but in a computer graphics context the amount of available literature is limited and difficult to implement. Because of this, the text aims at providing a solid foundation of the mathematics needed, at explaining in greater detail the steps needed to solve the problem, and lastly at improving some aspects of the animation process as it has been described in earlier works. The aim of the system itself is to provide visually plausible renditions of animated fluids in three dimensions in a manner that allows it to be usable in a visual effects production context. The novel features described include a generalized interaction layer providing greater control to artists, a new way of dealing with moving objects that interact with the fluid and a method for adding source and drain capabilities..

Syftet med detta examensarbete är att få en bild av hur eleverna ser på motivationen under matematiklektionerna, samt om eleverna upplever någon skillnad mellan låg- och mellanstadiet i matematikundervisningen vad gäller motivationen.I bakgrunden presenteras motivation utifrån några olika definitioner. Olika begrepp inom motivation så som inre och yttre motivation, prestationsmotivation och flow beskrivs samt att tre olika teorier belyses.Studien är gjord i Kalmar och sammanlagt har 23 elever intervjuats, 11 elever från årskurs 3 och 12 elever från årskurs 6.Resultatet visar på att det är olika faktorer som inverkar på elevernas motivation men att det framförallt är elevernas inre motivation som påverkar. För att eleverna ska uppleva matematiken mer motiverande krävs dock att det används mer praktiska uppgifter så som spel och lekar i undervisningen. De elever som medverkade i undersökningen upplevde att matematiken är mer motiverande på mellanstadiet då uppgifterna är mer utmanande och eleverna ser en användning av matematiken i det vardagliga livet..

This work studied the information flow and information handling among different parties. The study focused on how educational materials on national tests from The Swedish National Agency for Education is managed by school principals and teachers and how the information is passed on to students. The data material was based on observations and interviews at two different high schools. Six teachers and their classes and principals participated in the study. The Agency was also interviewed.

Climate changing is a growing problem for many countries and communities over the world. The cities has a huge work to deal with in their reforcements of their cities to be resilient ones. This thesis makes an effort to investigate and illuminate some of the problem the cities has to solve related to flooding, hazards, erosions, rising sea levels and crotches. This thesis will help to find solutions that international and national efforts has produced and handed out to each other. A lot of communities are charing their excellent tools that works for them.

Detta examensarbete handlar om Rain Garden. Arbetet vänder sig till dig som har ett intresse för dagvattenhantering. De som söker djupare kunskaper i ämnet kan använda sig av förteckningen över referenser. I framtiden förväntas klimatförändringar med höjda temperaturer och ökade nederbördsmängder som följd. Samtidigt växer städerna vilket leder till att andelen hårdgjorda ytor ökar och den naturliga infiltrationen minskar.

FlexRay is a new communication protocol which is fast, reliable and flexible and therefore can meet the increasing demands on data communication in the vehicle industry. The protocol is developed by an industrial consortium containing among  others BMW, Daimler Chrysler, Motorola and Phillips. Today (May 2009) Hägglunds is using CAN for data transmission in their systems. CAN is getting obsolete and has difficulties in coping with the increasing flow of communication. In this report FlexRay and its communication capacity is studied.

This paper describes the development of a simulation model for the ambulance flow in the Västra Götalands-region of Sweden, and an analysis tool for the output of the simulation model. The aim of the simulation model was to be able to evaluate the outcome from changes in the ambulance operations, such as a reorganization of ambulances or an increase in intensity of the ambulance calls. This evaluation is meant to serve as decision support for the strategic planning of the ambulance operations. The analysis tool was developed to visualize the abundant geographical data produced by the simulation model in a meaningful way. The simulation model was validated against historical data which showed that the dispatch time for the highest prioritized ambulance calls corresponds well with historical data.