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In this paper stability and dynamic properties of voltage and frequency droop control of power electronic converters are investigated for a distributed generation system. Droop control is utilized to share active and reactive power among the source converters. The voltage and frequency controllers are designed so that stand-alone converter operation feeding constant power loads performs satisfacto
Pregnancy in a rudimentary horn of a bicornuate uterus is a rare and often fatal event. A case is presented of such a pregnancy detected in the second trimester routine ultrasonographic examination.
Helicobacter pylori was identified in human liver tissue by PCR, hybridization, and partial DNA sequencing. Liver biopsies were obtained from patients with primary sclerosing cholangitis (n = 12), primary biliary cirrhosis (n = 12), and noncholestatic liver cirrhosis (n = 13) and (as controls) normal livers (n = 10). PCR analyses were carried out using primers for the Helicobacter genus, Helicobac
This investigation makes a survey of the spread of fire and the fire development in low-rise residential building areas through obtaining the literal knowledge of factors having influence on a fire in one burning building and fire spread between buildings within a group of single-family houses. The purpose of the investigation was, on basis of the knowledge, to propose improved measures and the ch
During recent decades, research on quality of life has gained increasing interest. In gerontology, the assessment of objective as well as subjective dimensions is recommendable, and the most innovative research will involve the study of the interrelationships of several components. In empirical research objective environmental factors have rarely been explored. The aim of this study was to explore
The G-protein coupled melanocortin 4 receptor (MC4r) plays an important role in the energy metabolism. We overexpressed the MC4r in CHO cells and performed characterisation studies on the cell membranes to determine functional stability and ligand binding properties of the receptor. The affinity for the ligands [Nle4, Image-Phe7]-αMSH and MTII was lost below pH 6 but could be restored by returning
The aim of the mini review is to more precisely determine the relationship between exocrine pancreas function and the growth of young pigs. In order to do so, it is necessary to clarify the components, pathways and messengers involved in the CCK-dependent neuro-hormonal regulation of the exocrine pancreas in the growing pigs. These mechanisms are largely unknown, and the role of CCK has been quest
OBJECTIVE. To define the histological lesions in the placenta associated with abnormal blood flow findings and to evaluate their possible clinical significance. DESIGN. A prospective blind study. SETTING. A clinical study at a teaching hospital, Malmo General Hospital, University of Lund, Sweden, morphological studies of placentas being performed at the Institute of Pathology, University of Lausan
The helicity dependence of the (γ) over right arrow(p) over right arrow -+ peta reaction has been measured for the first time at a center-of-mass angle theta(eta)*= 70degrees in the photon energy range from 780 MeV to 790 MeV. The experiment, performed at the Mainz microtron MAMI, used a 4pi-detector system, a circularly polarized, tagged photon beam. and a longitudinally polarized frozen-spin tar
Lågdos-DT (datortomografi) av näsans bihålor vid rinosinuit ger en god visualisering av samtliga näsans bihålor, även av etmoidal-, sfenoidal- och frontalsinus, där konventionell röntgenundersökning är förenad med stor osäkerhet. Lågdos-DT ger värdefull tilläggsinformation om både anatomi och patologiska förändringar, som inte kan erhållas med konventionell röntgenundersökning. Stråldosen till pat
During recent years the nuclear decay modes of discrete prompt proton and a-particle emission from (super)deformed high-spin states have been discovered in nuclei in the Vicinity of Ni-56. The latest news from experiments performed at EUROBALL and GAMMASPHERE regarding these decays are presented and discussed.
The relationship between defensive strategies as measured by the Meta-Contrast Technique (MCT) and self-reported trait anxiety, trait aggression and defensiveness, as measured by the Karolinska Scales of Personality (KSP), was investigated in 83 healthy men. Further aims of the study were to describe and document how a healthy and demographically well defined group of subjects responded to the MCT
We have investigated pre-travel advice, behaviour, chemoprophylaxis and diagnostic delay in travellers returning to Sweden with falciparum malaria. Questionnaires were distributed to patients having been notified with falciparum malaria from 1994 to 2001. Of 408 notified patients, 237 (58%) returned the questionnaires; 62% were males and 43% above the age of 45 y. Africa was the travel destination
Streptococcus pneumoniae isolates of serotypes 1, 4, 6B, 7F, 14, and 19F belonging to clonal types with known invasive disease potential in humans were used to infect C57BL/6 and BALB/c mice. Most isolates were able to colonize the nasopharynx for 7 days. One serotype 19F isolate of the clonal type ST162 had higher bacterial numbers than other isolates and clonal types of the same serotype. Seroty
