Today most ice rinks in Sweden use secondary refrigeration systems with a solution of calcium chloride and water as secondary refrigerant. Due to the large amount of energy such a system uses more efficient systems would be desired.An earlier study concluded in the possibilities of using carbon dioxide as secondary refrigerant with copper tubes as the loops in the ice rink. Since then 3 ice rink refrigeration systems has been built with carbon dioxide in copper tubes. Excluding the ones being direct involved in those projects there is still very little knowledge about how these system works. This study has been made primarily with the aim of adding to the knowledge concerning availability and cost and secondary to look at possibilities for improvement.A comparison between systems with carbon dioxide, calcium chloride respective ammonium solved in water has been made by using Decision Matrix.

The aim of these two studies was to investigate the possible physiological, behavioural and emotional changes that appear after human-horse interactions and also to find an explanation to why they occur. One aspect that is discussed is whether the wellbeing of humans can be coupled to interacting with horses and of how the animals respond to the interaction. The first study was performed on 9 horses and their owners, both parts being subjects to registrations during 4 different interaction treatments. The second study was performed on 6 horses with registrations only being performed on the horses during 2 different treatments. Nine horses underwent 3 different treatments all performed by their owners (H = stroking of the horses forehead, B = brushing and M = stimulation of the withers) in addition to a control round (K). Each treatment lasted for 4 minutes but observations were performed until after 45 minutes from start.

Because of the increasing trends in energy consumption and increased environmental awareness, greater focus has been placed on improvement and development of renewable energy sources. An already proven and accepted method is biogas production from anaerobic digestion at municipal wastewater treatment plants.In the waste water treatment process solid material and dissolved pollutants are separated from the water, forming a sludge. The sludge is separated from the process and stabilized during anaerobic digestion or aerobic aeration. Most often, mesophilic anaerobic digestion is used. Because of degradation by microorganisms, biogas with a high content of methane is formed during the digestion.

This project concentrates on musicians who work in a professional music studio.The task of this project was to design a new headphone system called Foldback system.The advantage of this system is that all involved in a music project could influence their ownlistening during the project. With a couple of adjustments should each and everyone get theirown individual listening from their headphone station.This report shows different methods, theories and results that came along in development ofFoldback system. The project has resulted in a finished product that will be in use atStudiomega..

 This degree project aims at developing a concept for how to use solar energy to pump up water. The target audience is people living in areas where the functioning of the electricity and water network is absent. In these areas, the hand-powered water pump is the most common technology. The degree project's goal is to find an economically viable alternative to the time consuming hand-powered water pumps. The power comes from solar energy.

Background: Peripheral arterial disease (PAD), as a consequence of atherosclerosis in the arteria of the limbs, affects one of ten Swedes older than 65. PAD can develop slowly and silently, and involves an increased risk for cardiac infarction and stroke. Measurement of the patient´s ankle blood pressure and calculation of the ankle-brachial index is an evidence-based method to discover PAD. Objective: To investigate how district nurses and general practitioners perceive this method of examination and experience possible obstacles to why it is not more commonly applied at primary health care centres. Method: Data collected by semi-structured interviews have been processed by qualitative content analysis with a manifest onset.

Forskningen om lobbyism i Sverige har hittills i huvudsak fokuserat på riksdagen. I den här uppsatsen undersöks lobbyism på kommunal nivå utifrån ett mottagarperspektiv med fokus på beslutsfattare och deras erfarenheter av lobbyism. Syftet är att belysa hur beslutsfattare i svenska kommunfullmäktige uppfattar att lobbyism går till i sina egna kommuner. Studiens utgångspunkt utgörs av lobbyismens relation till demokrati och i den kvalitativt genomförda undersökningen används en analysram baserad på tre värden för demokratisk lobbyism, benämnda transparens, jämlikhet och etik. Empirin har samlats in genom intervjuer med åtta kommunala fullmäktigeledamöter.

The author of this report has created a Web-based invoice system and CRM at therequest of the company Webhouse.se. The purpose of the System is to makeeveryday tasks in the company easier. The system also needed to prevent mistakesand errors by managing orders and invoices.The system has been created with the company?s requests in focus. During thedevelopment of the system information security and interaction design have beenimportant aspects that have been taken into consideration.The system has been created using techniques such as PHP and MYSQL.

Patienter med morbid obesitas har en ökad risk för atelektasbildning och postoperativarespiratoriska komplikationer efter generell anestesi på grund av sänkt vitalkapacitet (VC),funktionel residualkapacitet (FRC) och total lungkapacitet (TLC). Tidigare forskning har visat attPostoperativ Bi-level Positiv Airway Pressure (BIPAP) ventilations behandling minskar denna risk.Denna studie avsåg att utvärdera om postoperativ BIPAP-behandling förbättrar patienternas SpO2,paO2 , paCO2 och pH i arteriellt blod efter genomgången elektiv gastric bypass kirurgi jämfört medtraditionell postoperativ behandling. Insamlat material från 18 patienter huvudsakligen bestående avarteriella blodgaser och bakgrundsdata analyserades med analytisk statistisk. För att kunna beskrivahur patienterna upplevde BIPAP-behandlingen ställdes två öppna frågor ställdes till patienterna,.Resultatet visar att postoperativ behandling med BIPAP under 3 timmar ger högre SpO2 och lägrepaCO2 än traditionell postoperativ behandling efter elektiv gastric bypass kirurgi. Vid bådabehandlingarna sjunker paO2 och pH är oförändrat.

In order to reduce the price for, and improve the performance of automatic control systems for magnetization of synchronus generators, the possibilities of using a PC based software PLC system, Programmable Logic Controller, has been investigated. The result is a system based on the CoDeSys software PLC with runtime environment from 3S-Software, communicating with external units via Modbus fieldbus. System price is reduced from ?5000 to ?2000 and system processing speed is reduced from 10 ms for a Siemens S7 PLC to 4 ms with the CoDeSys PLC system though unsolved problems with runtime seizure caused by improper settings in the PC BIOS..

In this thesis a transport system is sought after thatif realised in the city of Uppsala could provide bothwell-being to all its inhabitants and sustainability,here jointly refered to as liveability. It is found thatthe car dominated transport system that is inoperation today provides two fundamental values,namely accessibility in both time and space, whichsets it apart from other transport solutions. Thesetwo values are of immense importance for theliveability in our modern world. On the other handthe car dominated system decreases the liveabilityof Uppsala in several different ways. Some of theseproblems, it is argued, could be solved within thecar system, through the adoption of moreenvironmentally friendly cars etc., but otherproblems are inherent in the car system and willremain no matter what changes are made.

This paper is a qualitative study on the influence of the residents in a special communitydwelling within the care system for elderly. The purpose of the study is to describe and analyse with a user perspective how particularly staff members but also a group of retired people living in this dwelling interpret and articulate the concept of resident influence. How the retirees can influence the design and the content of the activities and the organization. How today the residents influence is carried out with the ideas and visions of the future.My methods include qualitative structured, semi-structured and non-structured interviews within a general frame of a resident questionnaire. The staff members present the current situation and reflect on the reasons for obstacles for resident influence.The group of retired people who lives in structures originating in the Swedish long-term care system and homes for the elderly tends to adjust to given routines and express a low-voiced wish for increased influence.

Because of increasing demand of power on Malmbanan the capacity of the existing wires which supply the trains must be increased. This increases the stress on the existing poles and for this reason the system for supplying the loads along the railway is to be removed from the poles and be replaced by some other system. This thesis is a study on a two-level low voltage (1 kV and 0.4 kV) electrical system with the aim to investigate if it can be an alternative to the system used today taking into account the voltages, fault currents and costs.In this thesis the following tasks have been performed:? Gathering of data? Description of basic theory? Loadow and fault current calculations of the system with MATLAB? Life Cycle Cost estimate of the system? Analysis and conclusions from the resultsThe results show that the new system can be an alternative to replace today's system. The simulations and calculations show that the voltage drop is at an acceptable level and that the fault currents are large enough to supply a safe disconnection if a fault occurs at the far end of the system..

As EU?s authority increased the number of lobbies in Brussels grew. Today there are approximately 15 000 lobbyists in Brussels. EU decisions and EU directives can have a huge impact on companies and organizations. They can however influence these decisions and directives through lobbying.

The management of information is a significant competitiveness in companies. Companies stored and save information every day, and it is very common to save de information in different sources. This makes de management of information complex. To mange, monitor and analyze the information, companies can use a system called Business Intelligence. BI system is an analytical system that extracts and converts data into useful information that helps employees to make informed decisions.