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We present a unified approach for calculating the properties of shallow donors inside or outside heterostructure quantum wells. The method allows us to obtain not only the binding energies of all localized states of any symmetry, but also the energy width of the resonant states which may appear when a localized state becomes degenerate with the continuous quantum well subbands. The approach is non
Popular Abstract in Swedish Denna studie handlar om sysselsättningsintegrationen av manliga och kvinnliga invandrare i Sverige mellan 1970 och 1995. Första kapitlet inleds med en översikt av teorier och tidigare studier om invandrares sysselsättning. Utifrån denna formuleras ett antal hypoteser. Det andra kapitlet ger en översikt av den svenska migrationshistorien, invandrarnas karaktäristika samtThis study deals with the employment integration of immigrant men and women in Sweden between 1970 and 1995. The first chapter starts with a review of theory and previous studies on immigrant employment and from this a number of testable hypotheses are framed The second chapter gives an overview of Swedish immigration history, the composition of the immigrant population and the economic background
Abstract is not available
Source-sorted municipal organic waste from different dwelling types in five Danish cities was sampled during one year. The samples were from permanent, full-scale systems or temporary, experimental systems for collection of source-sorted municipal organic waste. Pre-treatment of the organic waste prior to biological treatment was used in all cities to remove foreign objects and provide size reduct
Three new diarylheptanoids, (4Z,6E)-5-hydroxy-1-(4-hydroxy-3-methoxyphenyl)-7-(4-hydroxyphenyl)hepta-4,6-dien-3-one, letestuianin A (1), (4Z,6E)-5-hydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)hepta-4,6-dien-3-one, letestuianin B (2), and 1,7-bis(4-hydroxyphenyl)heptan-3,5-dione, letestuianin C (3), as well as the known (4Z,6E)-5-hydroxy-1,7-bis(4-hydroxyphenyl)hepta-4,6-dien-3-one (5) were isolated f
The energy transfer within a series of Zn-porphyrin appended dendrimers was studied by means of time-resolved fluorescence anisotropy. We show that the energy transfer process between the Zn-porphyrin units in the dendrimers is limited to a maximum of four porphyrin units. At 200 K, the energy transfer process takes place on a 100-ps time scale, and can be modeled by Forster theory. Our results at
Om filmatiseringen av Axel Wallengrens (Falstaff, fakirs) novell "Ett svårskött pastorat" (1958).
Efficient inventory control depends on correct values of inventory cost parameters, such as holding costs, shortage/stockout costs and ordering/setup costs. However, there exists surprisingly little research concerning the size of these parameters or how they should be determined. This thesis is devoted to increasing our knowledge of these matters. The research is presented in the form of five sc
This study presents a simple and rapid solvent exchange procedure using a hollow fiber. Antioxidants (Irganox 1010, Irganox 1076 and Irgafos 168) and solvents such as tetrahydrofuran (THF), carbon tetrachloride and toluene were selected as model compounds and sample solvents, respectively. After injection of the sample solution into the hollow fiber and solvent evaporation, the precipitated analyt
Multiphase clock generators are conventionally implemented with a feedback loop. This paper presents a non-feedback approach to generate multiphase clocks. A simple architecture of direct phase interpolation is proposed, in which the edges of two phase-adjacent signals are used to control the discharge (or charge) of two capacitors respectively, producing time-overlapped slopes. A resistor chain c
The heat of wetting of regenerated cellulosic fibres (TENCEL (R), Viscose and Modal) was investigated by reaction calorimetry in comparison with cotton, polyester and TENCEL (R) Fabric. Reaction calorimetry is a technique applied for measuring the heat evolved in chemical reactions where very high analytical precision is required Before the measurements, the fibre samples were dried in an oven at
Rapporten beskriver en studie som syftat till att undersöka och beskriva tre typer av Probiks fuktindikatorer från Alfasensor AB. De olika typerna är Probiks CO, BI och HU. Studien är delvis utförd på laboratorium och delvis i fält på en byggarbetsplats. I rapporten har även erfarenheter från mätningar i befintliga byggnader sammanställts. I studien har en rad experimentella försök av indikatorern
Målet med projektet var att analysera problem med arbete i kyla i mjölkproduktionsanläggningar vad gäller förekomst, frekvens och skaderisk samt att föreslå åtgärder för förbättringar. Projektet bestod av två delar: Del 1. En fältstudie, som genomfördes dels i Uppsalatrakten, dels i Västerbottens län. Del 2. En enkätstudie, riktad till Lantbrukshälsans medlemmar i norra regionen. Fältstudierna omfThe aim of the project was to analyse problems with cold when working in dairyfarms with respect to prevalence, frequency and risk for injuries and to propose measures for improvements of thermal conditions. The project comprised two parts: a field study and a questionnaire survey. The field studies were performed at seven dairy-farms in the Uppsala region and six dairy-farms in the northern regio
For a random walk with negative mean and heavy-tailed increment distribution F, it is well known that under suitable subexponential assumptions, the distribution pi of the maximum has a tail pi(x, infinity) which is asymptotically proportional to integral(x)(infinity)F(y,infinity) dy. We supplement here this by a local result showing that pi(x, x + z] is asymptotically proportional to zF(x,infinit
Medeltidshandskrift 14, the so called Liber scole virginis, is the oldest existing song book of the Cathedral of Lund. It has been given much attention this year in connection with the 900th anniversary of the archdiocese of Denmark. The codicological analysis of this manuscript tells an interesting story about the development of the Marian cult in Lund.
Several converging lines of contemporary evidence suggest that weakness presents a more serious compromise to movement function in poststroke hemiplegia than spasticity. This review examines the clinical and functional phenomena of weakness in poststroke hemiplegia, currently available evidence identifying physiologic substrates contri-buting to weakness, and reports of early investigations involv
