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This paper describes trade-offs involved in designing a dual-band CMOS frontend for wireless local-area network (WLAN). Three 0.18μm CMOS frontends have been investigated, a single-band frontend at the 2.4 GHz ISM band, a single-band frontend at the 5 GHz U-NII band and a dual-band frontend. The study shows that employing a dual-band frontend yields satisfactory results, although some compromises

Gehörsspel för piano vänder sig i första hand till studerande vid musikhögskolor. Boken, som inkluderar 2 CD-skivor, vänder sig i första hand till studerande på musikhögskolor, gymnasieskolor och folkhögskolor. Den kan också användas vid undervisning inom musik- och kulturskolor samt i fortbildningssyfte. Man behöver dock vissa grundkunskaper i piano — materialet är alltså inte avsett för rena nyb

Popular Abstract in Swedish Immunsystemet skyddar kroppen mot infektion. För att kunna skydda mot infektion krävs att immunsystemet är utrustat med kraftfulla biokemiska motmedel. Ett sådant motmedel är antikroppar. Antikroppar är proteiner som känner igen och specifikt binder till andra molekyler via en s k molekylbindande klyfta. När antikropparna har bundit in till en molekyl på t ex en bakteriPrimary infections and vaccination stimulates the immunesystem to produce memory cells that rapidly respond to reexposure of the same antigen. These memory responses are dependent on an adaptive type of immunity that sustains the reactivity of the immune system by long-lived memory immune cells. From an evolutionary perspective adaptive immunity as such appears to be restricted to jawed vertebrate

Popular Abstract in Swedish Äggstockscystors förekomst, risken för kvinnor med cystor att utveckla äggstockscancer samt Plasminogenaktiveringssystemets uttryck i äggstockstumörer Äggstockscancer är ovanligt hos unga kvinnor, men den 4:e vanligaste dödsorsaken i cancer hos kvinnor i åldern 45-64 år i Sverige. Livstidsrisken är 1 på 70. På grund av få eller obefintliga symptom upptäcks äggstockscanThe aims were to assess the prevalence of ovarian tumors in fertile asymptomatic women and to evaluate the risk of ovarian cancer in women with a history of benign ovarian tumors and endometriosis. In order to search for biomarkers in ovarian tumors, the plasminogen activating (PA) system was studied. A random sample of women 25-40 years old was invited to a transvaginal ultrasonography examinati

This paper raises the issues confronting the minority cohort’s participation in the construction industry. Women in construction are seen as the wrong gender to be around for the construction occupations require not only manual dexterity but physical strength. Currently, the industry is employing less than 10% of the female in the workforce with even lower participation in crafts and trade. This p

Popular Abstract in Swedish Pappersbrott i planet har studerats med hjälp av den kohesiva sprick modellen ur ett experimentellt såväl som ur ett teoretiskt perspektiv. Brott i en pappersremsa erhålls när remsan i en provmaskin belastas till sin maximala bärlast. Om remsan är tillräckligt kort fås en stabil nedåtgående last-förlängnigs kurva efter det att max lasten är nådd. Det visade sig att denThe in-plane failure of paper is studied in this work by means of a cohesive crack model from experimental as well as theoretical perspectives. Localized damage at in-plane tension of short paper strips is studied for low strain rates. It is observed that under uniaxial in-plane tensile tests, the evolution of the failure is stable and the damage of the paper strip is localized into a narrow zone

This book contains a series of articles based on papers presented at a Nordic symposium held in autumn 1997. The articles have archaeological material culture as their main focus. They deal with the fundamental, but often ignored, questions of how form, function and context relate to each other and how form and in particular function may change with context. The central concept of context - define

The short paper describes and exemplifeis specific design and research considerations in developing efficient and engaging pedagogical agents that not only capitalize on technological advancements but are also sensitive to cognitive, emotional, and social aspects while valuing and maintaining ecological validity in an educational context