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Distributed energy resources, such as wind turbine generators, often employ induction generators. When such a generator is subjected to a nearby fault, its rotor may accelerate and reach high steady-state speed far from that corresponding to the frequency of the system. This is the generator counterpart to induction motor stalling, which is classified as voltage stability. The phenomenon is a matt
InP quantum dots grown on GaInP by the Stranski-Krastanow technique are less well studied than InAs quantum dots grown on GaAs. We here give a review of the main experimental evidence for the InP dots being charged when grown in between n-type barriers.
At least twenty books and several hundred articles have been published during the last ten years on the subject of the nature of fiction. This article deals with four recent attempts by Genette, Jacquenod, Currie and Steffensen to reformulate the theory, largely on the basis of Searle's feigned assertions, of the semantics of possible worlds, of narratology and of linguistic pragmatism. In these n
The present study deals with free play in preeschool. The purpose is to investigate the way children conceptualize play, and the significance of play in preeschool activities. The latter has been illuminated through an analysis of normative documents, and vatious methods have been worked out that show how the possibilities of play can be made use in preschool. Group interviews with children betwee
Filtering and reconstruction of signals play a fundamental role in modern signal processing, telecommunications, and control theory and are used in numerous applications. The feedback principle is an important concept in control theory. Many different control strategies are based on the assumption that all internal states of the control object are available for feedback. In most cases, however, o
Summary Previous studies on precipitation over South America that strongly support the existence of links between precipitation and SST anomalies in the Pacific Ocean have identified specific regions where the ENSO signal is particularly stronger. Northeast of Brazil and some parts of southern South America are examples of these regions. However, the same attention was not taken to identify which
The interaction between recombinant human cystatin C and the cysteine proteinases papain and actinidin was studied by spectroscopic, kinetic and equilibrium methods. The absorption, near-u.v.c.d. and fluorescence-emission difference spectra for the cystatin C-proteinase interactions were all found to be similar to the corresponding spectra for chicken cystatin. The kinetics of binding of cystatin
An increased prevalence of asthma in cross-country skiers has been reported previously. This study was conducted in order to evaluate the prevalence of asthma among young, elite cross-country skiers in Trondelag, Norway and Jamtland, Sweden. These two regions in central Scandinavia have different climates during the winter season, with a coastal type in Trondelag while Jamtland is characterized by
Objectives: To study diagnostic delay in invasive bladder cancer in a population-based material with long-term follow-up, and to evaluate whether delay in diagnosis affects the risk of bladder cancer death. Material and Methods: In a previous study, 177 patients with invasive bladder cancer (T1-T4) diagnosed in 1988 were investigated with regard to diagnostic delay. A review of all available clini
Popular Abstract in Swedish I mer än tre årtionden har kvinnors situation och främjandet av jämställdhet mellan kvinnor och män lyfts fram inom utvecklingssamarbetet. Bilaterala organisationer har gjort politiska åtaganden och utvecklat strategier, metoder och instrument för att uppnå detta viktiga mål. Som uppföljning på FNs fjärde kvinnokonferens i Peking (1995) är det viktigt att analysera vad Gender equality has been on the development cooperation agenda for more than three decades. Bilateral agencies have developed policies, strategies, methodologies and tools to support achievement of this important goal. Following the Fourth United Nations Conference on Women in Beijing in 1995 it is important to take stock of the progress that has been made, and identify the changes needed for movi
Object. Arterial vasospasm is the most common cause of delayed ischemic neurological deficits (DINDs) and one of the major causes of disability following subarachnoid hemorrhage (SAH). Current management of vasospasm involves intravascular volume expansion and hemodynamic augmentation with the goal of increasing cerebral blood flow (CBF). The purpose of this study was to examine the effects of vol
We investigate the propagation of electromagnetic waves in a cylindrical waveguide with an arbitrary cross section filled with a nonlinear material. The electromagnetic field is expanded in the usual eigenmodes of the waveguide, and the coupling between the modes is quantified. We derive the wave equations governing each mode with special emphasis on the situation with a dominant TE mode. The resu
The human-specific bacterial pathogen Neisseria meningitidis is a major cause of sepsis and/or meningitis. The pili of N. meningitidis interact with CD46, a human cell-surface protein involved in regulation of complement activation. Transgenic mice expressing human CD46 were susceptible to meningococcal disease, because bacteria crossed the blood-brain barrier in these mice. Development of disease
Excited state properties of fluorobenzene, chlorobenzene, bromobenzene, and iodobenzene have been investigated theoretically using multireference CASSCF and CASPT2 methods. Experimentally, chlorobenzene and bromobenzene are known to exhibit one fast dissociation channel, whereas iodobenzene exhibits two fast dissociation channels. The calculations indicate that the chlorobenzene, the bromobenzene,
Objectives To reanalyze randomized controlled trials on the use of umbilical artery Doppler velocimetry in high-risk pregnancies and determine which high-risk pregnancies benefit from the use of Doppler velocimetry, Methods Searching Medline, the Cochrane Library and Embase we found 13 randomized controlled trials on the use of Doppler velocimetry in high-risk pregnancies. Of these, six included p
