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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
Det är svårt att stifta en konkurrenslag som effektivt motverkar karteller samtidigt som den tar tillvara företagens rätt till en rättvis rättegång. Vårt samhälle är idag präglat av en marknadsekonomi som är i behov av en välfungerande konkurrens. Karteller är kostsamma för samhället och ytterst för samhällsmedborgarna. Det finns betydande incitament för företag att samarbeta konkurrensbegränsande
Sweden has the highest rate of single households in the world (2012) as nearly half of the population live by themselves. Even though many Swedes live alone research suggests that dinner party trends (social cooking) will increase - a simple activity, regarding both cost and accessibility, that brings us together with friends and family in our single household life style. I am addressing the scena
Syfte: Att på den svenska marknaden undersöka effekten av resultatmanipulering, efter införandet av Svensk kod för bolagsstyrning. Metod: Kvantitativ datainsamling använd's för att utföra regressioner del's för beräkning av EM, del's för identifiering av signifikanta förklaringsvariabler. Informationen hämta's bland annat från årsredovisningar, SIS Ägarservice och Datastream. Studi
Vi har i vår uppsats undersökt huruvida det finns korrelationssamband mellan makroekonomiskafaktorerna och pris- och omsättningsutvecklingen för villor, för perioden 1990-2002. Faktorerna har i tidsserier analyserats med hjälp av multipel regressionsanalys. Resultaten av vår undersökning tyder på att förändringar av makroekonomiska faktorer leder till förändringar på villamarknaden. Resultaten är
Rapportens syftar till att granska förekomsten av eventuellt signifikant samband mellan resultatmanipulering och börsintroduktion för svenska företag samt därmed bidra till att reducera det rådande forskningsgapet på den svenska marknaden. Dessutom ämnades eventuella utmärkande egenskaper för företag som manipulerar resultatet på svenska marknaden att studeras, genom tillämpning av modifierade JonThe aim of the report has been to analyze whether Swedish companies that undergo initial public offering use Earnings Management. Further, the aim has been to analyze whether there are explanatory variables for the companies that uses Earnings Management with the use of the modified Jones model. This study has been performed with a quantitative method with a deductive approach for an analysis of
Using the pentadentate ligand (N-bis(1-methyl-2-benzimidazolyl)methyl-N-(bis-2-pyridylmethyl)amine, 2pyN2B), presenting two pyridyl and two (N-methyl)benzimidazolyl donor moieties in addition to a central tertiary amine, new Mn II and Mn IV -oxo complexes were generated and characterized. The [Mn IV (O)(2pyN2B)] 2+ complex showed spectroscopic signatures (i.e., electronic absorption band maxi
Background: Omission of prescheduled chemotherapy following surgery for gastric cancer is a frequent clinical problem. This study examined whether laparoscopic gastrectomy (LG) had a positive impact on compliance with adjuvant chemotherapy compared with open (OG). Methods: Patients with cT2-4aN0-3M0 adenocarcinoma treated with gastrectomy and perioperative chemotherapy between 2015 and 2020 were i
INTRODUCTION: Sympathomimetic (alpha-adrenergic) drugs are mainly used because of their vasoconstrictor properties, for nasal congestion, or as mydriatics. Although sympathomimetic drugs are used often, allergic reactions are rare, especially when the drugs are administered systemically. Cross-reactivity may exist among catecholamine derivatives, although reported data on this are contradictory. I
Hummingbirds are specialized hoverers for which the vortex wake has been described as a series of single vortex rings shed primarily during the downstroke. Recent findings in bats and birds, as well as in a recent study on Anna's hummingbirds, suggest that each wing may shed a discrete vortex ring, yielding a bilaterally paired wake. Here, we describe the presence of two discrete rings in the wake
Abstract in Undetermined We present an efficient method for importance sampling the product of multiple functions. Our algorithm computes a quick approximation of the product on the fly, based on hierarchical representations of the local maxima and averages of the individual terms. Samples are generated by exploiting the hierarchical properties of many low-discrepancy sequences, and thresholded ag
Background: Embryonic stem cells (ESC) have the capacity to self-renew and remain pluripotent, while continuously providing a source of a variety of differentiated cell types. Understanding what governs these properties at the molecular level is crucial for stem cell biology and its application to regenerative medicine. Of particular relevance is to elucidate those molecular interactions which gov
The slope is an important distance parameter for a convolutional code. It can be used to obtain a lower bound on the active burst distance and in this respect essentially determines the error-correcting capability of the code. An upper bound on the slope of rate R = b/c convolutional codes is derived. A new family of convolutional codes, called the maximum slope (MS) code family, is introduced. Ta
Taking advantage of the unconventional reactivity of twisted mono- and bis-amides of Tröger's base (TB), rac-6 and rac-7, respectively, the first synthesis of a 6-endo-monosubstituted TB analogue, rac-9, and the first rational synthesis of a 6,12-endo,endo-disubstituted TB analogue, rac-11, have been achieved. The bis-TB crown ether, meso-13, was prepared starting from rac-7. Meso-13 constitutes a
We report a case of a patient who suffered generalized urticaria, chest tightness, wheezing, nausea, vomiting, hypotension, and loss of consciousness. Two hours earlier she had taken Eulitop Retard following lunch. She had tolerated all the implicated food after the reaction. Allergy evaluation revealed intense positive responses to intradermal tests with bezafibrate active component and Eulitop R
Background: The tuberculin skin test is used for tracing of tuberculosis transmission and identifying individuals in need of prophylactic treatment. Methods: Using a case-control study design, we recruited 220 smear-positive tuberculosis cases and 223 randomly selected healthy community controls in Bissau, Guinea-Bissau, during 1999-2000. Tuberculin skin tests were performed on family members of c
Lately there has been an increasing focus on saving peak power in heating systems as a way to lower the environmental load past just saving energy. At the same time, active cooling is becoming increasingly interesting. Sweden has more and more cooling systems with an increase in cooling also in residential buildings. The cooling power is much more expensive than the heating power. Therefore, there
Power amplifiers play a crucial role in wireless communication systems. However, they can achieve high efficiency only when operating in the nonlinear region. To maintain linear output while operating in this region, several techniques have been developed, among which digital pre-distortion (DPD) is one of the most widely used. In this thesis, we designed and analyzed a digital predistortion (DPD)
There is a strong industrial drive to use cloud computing technologies and concepts for providing timing sensitive services in the networking domain since it would provide the means to share the physical resources among multiple users and thus increase the elasticity and reduce the costs. In this work, we develop a mathematical model for user-stateless virtual network functions forming a forwardin
