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The gain profile of a quantum cascade laser is strongly influenced by the lifetime of the carriers in the upper and lower laser state. The quantitative description of gain within the concept of nonequilibrium Green's functions allows for a detailed understanding of various features affecting the gain spectrum: Compensation effects between scattering processes in the upper and lower laser level, re
Despite a growing interest in critical social and political studies of climate change, the field remains fragmented and diffuse. This is the first volume to collect this body of scholarship, providing a key reference point in the growing debate about climate change across the social sciences. The book provides a new set of insights into the ways in which climate change is creating new forms of soc
Scanning tunneling microscopy induced luminescence (STML) has been used to investigate individual self-assembled InP quantum dots overgrown with GaInP. We will present results correlating the surface morphology with the optical properties of single dots. In particular, the strain induced energy-shift of the dot emission with increasing cap layer thickness and its relation to the overgrowth will be
This paper deals with the manual control of unstable systems, subject to control signal saturation. In particular we consider the Furuta pendulum, where the problem is to control the orientation of the arm manually while stabilizing the inverted pendulum. This paper presents an analysis which leads to an insight into the problem as well as the control strategy. This control strategy has been imple
Popular Abstract in Swedish Vattentransporten i växter är viktig för en mängd olika processer. De flesta fritidsodlare vet att vattentillgången påverkar växternas utveckling i stor utsträckning. För att solros ska kunna gro, växa, vända sig mot solen och bilda nya frön, behöver vatten flöda på ett kontrollerat sätt genom olika celltyper i växten. Växter transporterar vatten på olika sätt. Över lånPlant water channels are members of the very old Major Intrinsic Protein (MIP) family, with representatives in bacteria, fungi, animals, and plants. The genome of the model plant Arabidopsis thaliana contains 35 MIP genes. Based on protein sequence comparisons, the MIP family has been divided in four subfamilies: the PIP (Plasma membrane Intrinsic Protein), the TIP (Tonoplast Intrinsic Protein), t
Purpose of this paper Several different perspectives exist on the importance of food supply chain traceability and why it is scientifically investigated. These include the assessment of food security and quality preservation, economic, logistic, supply chain management, and information technical. Because of this, the concept of food supply chain traceability is defined in many different ways, depe
Climate models provide the means of making projections of the future climate, under assumptions on alternative future land-use changes and greenhouse gas emissions. The basis for such climate projections is discussed in this chapter,´together with the presentation of overall climate scenario results of relevance for agriculture. The focus is on the period until 2050.
Popular Abstract in Swedish I motsats härtill ökade patienternas reaktioner på hudsnittet i magen om de fått akupunktur under narkosen innan operationen började. I våra prospektiva randomiserade undersökningar på patienter som skulle opereras i buken (IV-V) jämförde vi akupunktur med låtsas-akupunktur under pågående narkos. Det visade sig att om patienterna fått akupunktur efter nedsövningen, behThe aims of the present thesis (I-V) were to evaluate the analgesic and adverse effects of manual acupuncture for low-back and pelvic pain during pregnancy (I) and for labour pain (II-III), and also to study the effects of low-frequency electro acupuncture (EA) on clinical physiological responses to skin incision in anaesthetized patients (IV-V). Acupuncture in obstetric patients (I-III) Manual
