This thesis is the result of the author?s interest in music and electronics, namely the design and manufacturing of a stereo sound system with an active crossover. In short it can be stated that an active crossover has many advantages over its traditional passive counterpart. The active design naturally results in a more complex system comprised of a multiple number of components. This report deals with the theoretical aspects of preamplifiers, crossovers and power amplifiers as well as power supply and control.

The thesis demonstrates protection solutions that can be suitable for a camp during internationalmissions in order to resist complex threats. The threats could consist of small arms, machineguns,RPG 7, anti armour missiles, mortar, artillery, HPM-weapons, car bombs, biological and chemicalweapons as well as sabotage and theft. It?s not the technology itself that makes the threat scenariocomplex it?s the way the opponent acts during the operations. The opponent acts usually incivilian clothes and therefore he is difficult to distinguish from other civilians.

The majority of all power cuts that affects individuals and communities are caused by earth faults on the power transmission lines at 10kV and 20kV level [1]. If these power cuts could be eliminated, less disturbances and interrupts would lead to large amounts of money savings.Swedish Neutral has developed such a protection system. When an earth fault occurs power is injected into the neutral point of the transformer. The RCC (Residual Current Compensation) protection calculates a compensation current exactly 180 degrees out of phase to the fault current. Doing this, the voltage at the fault location becomes very close to zero, without affecting the power transmission.The protection system can only compensate automatically for the fundamental frequency (50Hz), and manually for the 3rd, 5th, 7th and 9th harmonics.

A power system will inevitably be subjected to transient overvoltages, most often produced by switching operations and lightning strikes. These transient overvoltages may harm sensitive equipment without sufficient protection, but it is not an easy task to predict what transients may occur or how they affect the system. A fault occurred in a low voltage system at Forsmark 2012 and overvoltages from lightning were concluded as the probable cause. The three aims with this thesis are to develop and test a model of the power system at Forsmark 3, analyse the transient behaviour of the system when subjected to lightning surges and identify critical parameters, and lastly to provide a tool for investigating the protection of the system. The modelling and simulations were performed in the freely available simulation program LT Spice.

This piece of work develops a solution that automates protection against software keystroke loggers. Keystroke loggers can be used illegally to register a user's keystrokes and in that way acquire sensitive information. The solution was tested on two different networks and the efficiency was measured. The network represents an enterprise network that uses the operating system Windows along with the directory service Active Directory. A script was developed to solve the automation matter.

Sweden adopted a new anti-discrimination legislation 2009, DiskL, which aim to prevent direct and indirect discrimination in matters of employment and occupation.According to directives and practices from EU, pregnant workers are entitled a special protection from discrimination during employment situations. The purpose of this essay is to study the legal protection for pregnant workers in employment situations and also analyze whether male workers have similar protection when they plan parental leave. Both regulations from the EU-law and the Swedish law are presented and discussed. This because Swedish discrimination legislation is largely influenced by the EU-law.The study confirms that pregnant workers have a strong legal protection against discrimination through directives from the EU and DiskL. Employers must include this protection in employment situations.

This thesis looks at the difference between the legal protection in law and the legal protection in reality when a small company working with international trade comes in contact with seller's breach of contract. The thesis uses a case taken from a company with over 30 years experience trading with China and looks at the legal protection available along with the different possibilities of dispute resolution available to a company and then looks at the reasons why this legal protection never becomes a reality and the thesis also analyses some possible reasons for this gap between law in the books and law in reality..

This qualitative study aimed to examine which discourses can be found within the Child and Adolescent Psychiatry (BUP) and women?s shelters against domestic violence, concerning children that have experienced violence within the family, from two perspectives: the child?s need of father and of protection from violence. The study also aimed to examine which discourses can be found within the organisations concerning children?s well-being, how they define their mission concerning domestic violence and how this can affect the practical work with children that have experienced violence and their parents. The questions that the study aimed to answer were which discourses can be distinguished within BUP and the women?s shelters against domestic violence and how they can affect the different agencies? view of the child?s need and well-being.

The aim of this essay was to deepen the knowledge of how child-protection-work is illustrated by massmedia. The essay takes it stand in discourse analysis to explain what image is displayed of social work concerning child-protection that is published in news media during 2007 in one of Sweden?s most read evening-papers. The result of the study is that social workers involved in child-protection-work often are categorized as either too zealous or too uncommitted, in the media. The result reflected the current discourse concerning how social workers do their duties in the modern society..

This bachelor thesis covers fire protection methods of structural steel and the aim is to develop an information tool designed for inexperienced structural engineers. The information tool covers basic fire protection methods and the general way to produce a fire resistance for structural steel. The layout of this information tool is a simple folder that contains information about the most important steps when producing fire protection for a steel structure.The thesis starts with a general overview of the fire protection needed in buildings to fulfill national legislative and regulatory requirements. To get an understanding of how steel components behave during the influence of fire, a brief overview is presented of the material properties of steel. This chapter also contains a review of previous research in the area.

Intention: The purpose of this thesis is to see if an active investment decision in the Swedish Premium Pension System would result in a higher return than a non-active investment decision. A non-active investment decision is equivalent to leaving the money in AP7 Premium Savings Fund.Method: This thesis is a statistical analysis and has a descriptive character in which the calculations are based on secondary data, thus the thesis has a quantitative character. Furthermore three active portfolios in different risk categories have been chosen. These portfolios are compared with the AP7 Premium Savings Fund?s returns.

Collections, compilations and databases currently stand under a solid intellectual property protection in Sweden. This legal protection is partly a product of the old Nordic ?catalogue-rule? seen in the former 49 § of the Swedish copyright act (upphovsrättslagen) but was further extended by the implementation of the EU directive on the legal protection of databases 96/9/EG and the new sui generis-right. Since major values are represented digitally combined with the fact that Internet serves as the main provider for information a strong legal protection for databases must be carefully crafted. When crafting this kind of legal protection the right to freedom of information is balanced against the database producers? interests of property protection as well as social and public interests such as increased innovation.

How does the weather protection systems look like today, and how will they be developed in the future? These are questions that we have worked with during this project. At the start of our report there?s a summary of the leading weather protection manufacturers in Sweden. We have explained how these systems are constructed and how they work.

The purpose of this project was to invite a changed perception of active sitting, to introduce a more active way of sitting in office environments and destigmatize an active sitting posture such as straddling by giving active sitting products conscious aesthetics based on environment and positive associations. The goal with this project was an active sitting product for office environments with aesthetics considered encouraging to movement in a relaxed way, regardless of age and gender, and connect to materials and aesthetics related to activity, experience and recreation. Horseback riding, retro style surfing and skateboarding was an entry of investigation. The project was based on existing active sitting products, their function and production techniques. It was not a part of the project to investigate new models of sitting.

The purpose of this project is to analyze earthing systems for houses. By practical measurements and theoretical analyzes consequences of possible faults, that can occur within the facility and in the low-voltage distribution network, is illustrated.  The reason for this project is that nowadays one has to arrange with a main equipotential bonding system for buildings. Apart from that, if necessary, bathrooms must be provided with a supplementary equipotential bonding system.The practical measurements verify that potential differences in facilities may be due to voltage drops in the PEN conductor between the origin of the electrical installation and the power transformer.Based on the theoretical analyzes of possible faults, it is considered that the requirement for  supplementary equipotential bonding systems for bathrooms in most cases can be questioned, when basic insulation, fault protection, residual current devise and main equipotential bonding system already provides an adequate level of protection.A PEN conductor loss may result in a situation where metallic parts attached to the equipotential bonding system starts working as earth electrodes. Equipotential bonding system may also increase the incidence of stray currents. If TN-C-S systems is provided with a local connection to earth a redundant system against PEN conductor loss is obtained.