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The goal of this work is to build a dynamic model for a steam power plant, using frequency and step-response analysis and use it for construction of an automatic controlling system. The model is to simulate all the variables necessary for controlling with reasonable accuracy.
By using measurements at a power plant in x 14rebro, the transfer functions for the most important steam pressures
Our task has been to compare the ability of three different regulators to control some single-input single-output systems with unknown parameters. The regulators were a minimal variance regulator, the Self-TUning REgulator STURE and an active suboptimally dual regulator. No simulations with the minimal variance regulator are shown since it turned out that it performs as STURE on systems with const
Integrated product development combines multiple disciplines (mechanics, engineering, informatics) in the development of complex products in corporations. In today’s economy, the development environment could be considered volatile, uncertain, complex and ambiguous, which prompts for experimentation, incremental product design and continuous engagement with the customer or end user. Literature sug
The purpose of the thesis is to get a better understanding of computer algebra in general, and polynomial computer algebra in particular. This is done by implementing a library for a polynomials and methods that are needed to be able to perform operations on the polynomials. Then this library is used to implement Wilf-Zeilberger’s method, which is a method that can be used to prove certain combina
This study has its basis in the relation between social services and the public employment services. Financial assistance functions as the welfares utmost safety net and is supposed to work as a complement to the general system, which the society provides. To be entitled financial aid the individual who is considered able to work is required to be of disposal to the labor market. Therefore, the in
The aim of this study was to create an understanding of how Aftonbladet, one of Sweden's biggest newspaper, describes unaccompanied asylum-seeking children in the years of 2015 and 2018. Another aim was to analyze differences and similarities in the descriptions between these two years. The study was based on a qualitative content analysis of 91 articles published in Aftonbladet year 2015 and
The majority of all social work includes two crucial components. The first component relates to the importance of the relationship between the social worker and the client and requires the social worker to possess qualities and abilities that promote a strong working alliance. The second component regards the social worker as the working tool, a view that emphasizes the need for the social worker
Author: Frida Olander Title: Life as a rollercoaster- regarding relatives of people with bipolar disorder (translated title) Supervisor: Hanna Wittrock The aim of this study was to examine relatives’ possibility to dialogue and participate in the inpatient psychiatric care. The relatives should be involved in the care, but to what extent can they be? What controls relatives’ contact with the inpa
The aim of this study was to examine how assessment officers for the elderly were interpreting the concept of a “reasonable standard of living”. Which is described in a certain paragraph in the Swedish social services act (SoL) in assessing the application. We held qualitative interviews with various assistance officers in the south of Sweden where they gave us their view on the meaning of “reason
“A dagger through the skull and nothing to the wallet“ is a common expression for the situation in the squatter societies of Rio de Janeiro. It is used equally amongst the residents of the slums or “favelas” as they are called, as well as used by the recently implemented pacifying police force that work there. In Rio de Janeiro there are 17 murders committed everyday. The majority of those murders
The aim of this paper is to study rate-dependent switching in ferroelastic materials. More specifically, a micro-mechanically motivated model is embedded into an iterative three-dimensional and electromechanically coupled finite element framework. An established energy-based criterion serves for the initiation of domain switching processes as based on reduction in (local) Gibbs free energy. Subseq
Background. Age-specific incidence rates for breast cancer in low-risk and high-risk ethnic populations differ by age at which the incidence maximum is reached: around 50 years in low-risk populations and over 60 years in high-risk populations. The interpretation of these differences remains unsettled, one line primarily referring to biological differences, the second one to cohort effects of rapi
Abstract in UndeterminedThis paper addresses the use of ethnographic methods in the field known as family studies. While ethnographic methods are fundamental in the anthropological study of kinship and family, quantitative methods have long dominated family studies. To grasp the ideas and actions of human beings, however, we must pay attention to their intentions and recognize that intentions are
Popular Abstract in Swedish Ekonomin och välfärden är starkt beroende av tillförlitlig transport och energiförsörjningsteknologi. En stor del av denna teknik bygger på användandet av förbränningsmotorer. Då dessa till antalet är så stort utgör de tillsammans en stor miljöbelastning. Därför måste det läggas stora resurser på förbättrad motorstyrning och avgasrening. En av restprodukterna från förBoth the global economy and the society in general are dependent on the availability of reliable transportation. Most transportation technology involves the use of internal combustion engines in one way or another. Because of the large numbers of internal combustion engines in use around the world, their emissions have a significant environmental impact. Therefore, considerable efforts have been i
Abstract in UndeterminedThis article discusses the background to the erection of the huge church tower in Bjälbo, Östergötland, Sweden. Bjälbo, today a small rural village,was once the seat of one of the most powerful families in medieval Sweden. The erection of a church tower in Bjälbo probably served several purposes; shelter, dwelling, belfry and storehouse. The tall tower was also a grand symb
This study examines how Aftonbladet, one of Sweden’s most widely read tabloid newspapers, constructs and portrays youth gang crime in Stockholm’s Järva area. The study explores the dominant discourses shaping public perception and policy responses through a qualitative text analysis of 24 articles published between 2019 and 2023. Additionally, the role of social media in reinforcing these narrativ
This thesis aimed to gain a deeper understanding of the phenomenon of compassion fatigue among social workers within the social services, with those who are working in the child and family unit. The study focused on exploring how social workers experienced compassion fatigue in their professional roles and what factors contributed to these experiences. A qualitative method was used, and data were
