Filtyp
The activated sludge process is the main process in most urban wastewater treatment systems. It is considered complex in nature, and building its mathematical model in practice becomes difficult. A simple and easy way to build the simulation models for the system is needed. In this paper, a LabVIEW based simulator for the system is presented. LabVIEW offers a highly efficient, simple and flexible
Computer-based design analysis is nowadays a common activity in most development projects. Used for design evaluation, verification, validation, or as a support for design exploration, it fulfils an important support function for the engineering designer, thus making it essential to have an operationally efficient and effective integration between both the engineering design and design analysis ac
In this article, a framework for hadronic rescattering in the general-purpose Pythia event generator is introduced. The starting point is the recently presented space–time picture of the hadronization process. It is now extended with a tracing of the subsequent motion of the primary hadrons, including both subsequent scattering processes among them and decays of them. The major new component is cr
As the knowledge about anthropogenic impacts of climate change has grown, the awareness of the contributions from treatment of wastewater has widened the scope for wastewater treatment plants (WWTPs). Not only shall ever stricter effluent constraints be met, but also energy efficiency be increased, greenhouse gases mitigated and resources recovered. All under a constant pressure on costs. The main
Kraft black liquor lignin is a biofuel that is separated from the cellulose during kraft pulping. Improved technology and energy integration in paper mills have led to an energy surplus at many mills. It is therefore of great interest to extract the lignin from the pulp mill and sell it as fuel to replace fossil fuel in other furnaces. The fractionation of kraft black liquor with a total dry matte
Black liquor is a side-stream in the production of kraft pulp. The extraction of lignin and hemicelluloses from black liquor would reduce the load on the recovery boiler and give valuable by-products. Lignin was separated from black liquor by membrane filtration, using one ceramic and three polymeric nanofiltration membranes, with molecular weight cut-offs in the range of 200 Da to 1 kDa. Ultrafil
Emission trading schemes (ETS) have emerged as a popular climate policy measure and are increasingly advocated as policy instruments to support the transition to a green economy. Using complementary analytical methods, this research investigated the institutional developments and complexities of the New Zealand Emissions Trading Scheme (NZ ETS). It focuses on (1) institutional experience and admin
The control of systems with long delays, by considering the option of stable/unstable and minimum/non-minimum-phase processes, is a challenging one. Most of the existing solutions do not cover all the situations and, in any case, they lead to complex controllers. Simple controllers, easy to design and tune, are very important in the process industry. In this paper, some control schemes based on a
Svensk sammanfattningAvhandlingens syfte har varit att studera utvecklingen av en könskromosom i realtid genom att simulera dess framväxt i en hermafroditisk plattmask i laboratoriet. Jag gjorde detta genom att selektera på dels honlig fitness (fitness via ägg), dels hanlig fitness (fitness via spermier) med hjälp av en genetisk markör, som agerade som en könsbestämmande gen. Detta ska efterlikna Sex chromosome evolution in a hermaphrodite ancestor starts with the establishment of a sex-determining region (SDR). Over time, sex-specific genes, and/or sexually antagonistic alleles will become linked to the SDR. Sexually antagonistic alleles are a type of genetic variation that increases fitness for one sex while being detrimental for the other sex. Recombination arrest around the SDR and gen
This paper uses the framework of ecofeminism in its exploration of two rural modernist novels, Sylvia Townsend Warner’s Lolly Willowes (1926) and Mary Webb’s Precious Bane (1924). The development of ecocriticism and ecofeminism in the 1980s saw a proliferation of work on the relation between literature, gender and the natural environment (Glotfelty and Fromm, 1996; Gaard, 1993; Warren, 1997). The
This chapter discusses the role of combinatorial knowledge and its multi-scalarity in shaping the transformation paths of local productive systems that are affected by the gales of contemporary technological change. Analytic knowledge is often created with the application of experiment-based methods. The value is extracted from the application of scientific principles and theoretical modes of lear
Ständiga förbättringar är viktiga för att upprätthålla ett företags konkurrenskraft inom sin bransch. Kunderna vill ha en hög leveranssäkerhet och flexibilitet för sina ordrar, men utförande från tillverkningsföretagens sida riskerar att vara bristande. Därför kan utförandet av kartläggningar och mätningar av orderprocessen, i kombination med förbättringar, stärka ett företags vidare konkurrenskra
Om dina ögon vore lika känsliga som astronomers toppmoderna teleskop skulle du kunna se långa band av ljus när du kollar upp mot himlen. Dessa band kallas stjärnströmmar och befinner sig i yttre delen av våran galax, Vintergatan. Strömmarna skapas från en klump av stjärnor, t.ex. en dvärggalax, medan de roterar runt Vintergatan. Det som händer är att stjärnor slits loss från klumpen och dras ut tiThe orbital approximation for stellar streams is the assumption that all stars in a stream can be described as following the same orbit. In this thesis, I evaluate this approximation as a method for constraining the potential of the Milky Way. I wrote a program in MATLAB which integrates the orbits of test particles in a potential model which resembles that of the Milky Way's halo and disc. Th
This paper is a proposition of how to use an archetypal analysis based on new theoretical concepts of the Jungian archetypes, such as the image schema (Knox, 2001), the bi-polarity of complexes (Perry, 1970), and the culture complex (Singer, 2006). Consequently, these are combined with the cognitive schema theory, cues and the cultural frame switch theory. Furthermore, these theories are connected
Många anläggningar projekteras idag under jord. Det gör att det tillkommer krav på vattentätning av berget. Ett sätt att vattentäta en konstruktion är att använda dukmembran eller tunnelduk. Dock råder det oklarheter hur provningsmetoderna för brandklassificering och standarder skiljer sig internationellt. I en alltmer globaliserad värld är det viktigt att provningsmetoderna jämförs med varandra,
The purpose of the study was to gain an increased knowledge and understanding of women's pathways into prostitution and the experiences and feelings that coexist with being in this life situation. To find relevant empirical data for what we intended to investigate, we used our questions as guidance when we searched for autobiographical works depicting the life stories of prostituted women. We
The role and activities of the European Court of Justice (EJC) have been discussed for couple of decades now. Without any doubt the role that ECJ fulfils today in the European Community is not what it was in the beginning of its existence and perhaps not even what was strictly prescribed by the EC Treaty. In the present thesis will be firstly examined, how the present role of the ECJ, as a quasi-c
Sammanfattning Sedan Covid-19 pandemin bröt ut har samhället uppställt krav på att allt fler arbetstagare arbetar hemifrån med syfte att bidra till minskad smittspridning. Trots att distansarbete inte är en ny företeelse, har pandemin medfört att frågan väckts om möjligheten till distansarbete för vissa grupper av arbetstagare, även ska finnas i framtiden. Gränsdragningen mellan när och var vi arbSummary Since the outbreak of the Covid-19 pandemic, society has demanded that more and more workers work from home in order to contribute to reducing the spread of infection. Although teleworking is not a new phenomenon, the pandemic has led to the question being raised as to whether the possibility of teleworking for certain groups of workers should also exist in the future. The demarcation betw
