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In so-called compact two-mirror focusing and afocal systems the secondary mirror is situated at the paraxial focus of the spherical primary mirror. The peculiar conelike shape of the secondary is chosen to eliminate the spherical aberration. Thus the systems are stigmatic, but they have a great offence against the sine condition (OSC), creating uneven distribution of energy on the surface of the o

In 2 prospective studies, we previously reported on the early and accurate diagnosis of invasive candidiasis by determining the D-arabinitol/L-arabinitol (DA/LA) ratio in urine in neutropenic children with cancer at the paediatric oncology unit (POU) and in premature infants at the neonatal intensive care unit (NICU) at our hospital. In this retrospective study at the same units, we report how the

Popular Abstract in Swedish Syftet med denna studie var att kartlägga kvinnligt skolledarskap. En enkät sän-des till 235 kvinnliga rektorer. Av dem hade 204 tjänst som skolledare under den tid då undersökningen genomfördes och 173 av dem besvarade enkäten. Det externa bortfallet var alltså ca 15 procent. I den fortsatta framställningen avses med bortfall det interna. Nedan ges en sammanfattning avThe purpose of this study was to chart the situation of women principals. By the time the in-vestigation was made the whole amount of women principals in compulsory school was about 16 percent (90/91). Of 235 contacted women, 204 were serving as principals. 173 responded which means 85 percent. The study shows that responsibility rationality are important in women principals' work. They look afte

One of todays great issues is how an advanced medical technology like xenotransplantation should be applied. It is well known that medicine brings not only potential but also risk. On the cultural level, xenotransplantations are equally complicated; they arouse thoughts about whether our outlook on humanity will be influenced now that modern techniques can correct our defective bodies. The article

I denna andra upplagas fjorton kapitel – varav tretton publicerats tidigare som artiklar i årgångarna 218-223 (2014-2019) av Kungl Krigsvetenskapsakademiens Handlingar och Tidskrift – behandlas valda spörsmål rörande våldsanvändningens, den nukleära icke-spridningens, rustningskontrollens, underrättelseverksamhetens och cyberoperationers folkrätt, krigets lagar samt förhållandet mellan militär dok

Over the past decade, Chinese migration to Africa has increased rapidly alongside the expansion of Chinese economic engagement with the continent. The entrance of new forms of Chinese industry, aid, commerce and resource exploration has been transformative, prompting debates over whether China in Africa is better described as neo-colonialism or a new form of beneficial developmentalism. One of the

The present study focuses on in situ as well as ex situ studies on the sintering of pre-compacted powder mixtures of 50 at% Nickel-50 at %Titanium. In situ studies were carried out by monitoring the changes in morphology of the fracture surface of the compact continuously during heating in the hot stage of an environmental scanning electron microscope. Results on the initiation of sintering and it

Most state-of-the-art satisfiability algorithms today are variants of the DPLL procedure augmented with clause learning. The main bottleneck for such algorithms, other than the obvious one of time, is the amount of memory used, fn the field of proof complexity, the resources of time and memory correspond to the length and space of resolution proofs. There has been a long line of research trying to

Glas- och bärnstenspärlor var en del av dräkten som signalerade bärarens sociala och ekonomiska status. I artikeln presenteras pärluppsättningarna från 25 gravar daterade till yngre romersk järnålder period C1 och C2 funna i dagens Skåne. Pärlorna har ett varierat och unikt uttryck vilket stärker hypotesen att de mindre rika gravarna i Skåne, jämfört med på Själland, beror på ett mer stabilt samhä