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Impact work-rate of a weakly damped beam with elastic two-sided amplitude constraints subject to harmonic excitation is calculated. Impact work-rate is the rate of energy dissipation to the impacting surfaces. The beam is clamped at one end and constrained by unilateral contact sites near the other end. This system was an object of a vibro-impact experiment which was analyzed in our earlier paper
Artikel om dokumentärfilmer och dess bilder av förintelsen.
Popular Abstract in Swedish Lokal behandling med målsättning att förstöra kroppsvävnad genom uppvärmning (termoterapi) kan i vissa fall vara ett alternativ eller komplement till kirurgi. I avhandlingen presenteras utrustning och metoder för att, utifrån en fysikalisk synvinkel, göra sådana behandlingar säkrare och effektivare. Genom att beräkna temperaturefördelningen m.h.a. datorsimuleringar kan Local treatment with the aim to destruct tissue by heating (thermotherapy) may in some cases be an alternative or complement to surgical methods, and has gained increased interest during the last decade. The major advantage of these, often minimally-invasive methods, is that the disease can be controlled with reduced treatment trauma and complications. The extent of thermal damage is a complex fun
A wavelet generator producing 100 ps short pulses at 60 GHz is presented. The wavelet generator consists of a gated tunnel diode (GTD) integrated in parallel with an inductor. This forms a negative differential conductance (NDC) oscillator with the ability to switch the NDC property on and off, which makes it possible to generate short pulses. In the experiments described, the wavelet generator dr
The detection of microorganisms by PCR can be divided into four steps: (1) sample collection, (2) sample preparation, (3) DNA amplification and (4) detection of PCR products. The major problem in developing PCR-based detection methods is the sample preparation step. This step is necessary to overcome problems caused by PCR inhibitors and it determines, to a large extent, the sensitivity of the PCR
Information technology is a vital driver in today’s business environment. Recent developments of IT have facilitated for the relatively easy creation of markets on the Internet, so called B2B-marketplaces. However, judging from the survival rate of B2B-marketplaces (5 to 10 per cent), it seems like B2B-marketplaces are doing something wrong. This paper scrutinises several theoretical frameworks re
“The eyes lead the body.” A good visual environment is important for performance and wellbeing. Unsatisfactory visual conditions often induce a strained posture, more or less unconsciously, in an effort to improve vision. The requirements for the visual environment in an operating theatre are high. Surgeons or assistants who are having visual problems can induce treatment hazards. The purpose of t
Meteor radar observations carried out in August-September 1953-84 at theOnsala Space Observatory in Sweden show long-term, as well as short termvariations in meteor radar rates. These rate variations are associatedwith position in the solar cycle, and with variations in the solar windsector structure. An inverse correlation is found between meteor radarrates and the solar cycle. The magnitude of t
Popular Abstract in Swedish Dysfagi är ett symptom på onormal sväljningsförmåga. Detta symptom kan förekomma i samband med många olika sjukdomstillstånd men är vanligast i samband med olika neurologiska sjukdomar t ex stroke. Symptomen kan variera från en lätt känsla av upphakning och svårigheter att svälja specifik föda till livshotande kvävningsanfall. Logopeder har de senaste decennierna tagit In this study simultaneous videoradiography and intraluminal manometry (videomanometry) have been used in combination in three studies to analyze how different therapeutic strategies affect the physiology of swallowing in healthy volunteers and in patients with pharyngeal dysfunction. Analyses of healthy volunteers showed few significant measurable effects on the pharyngeal swallow. Some decreased
Allt fler får uppleva sin 100-årsdag. I hela Sverige finns det drygt 2 000 personer som är 100 år eller äldre. På fyrtio år har antalet personer över 65 år ökat med 57 %, från 1,17 miljoner 1972 till 1,83 miljoner 2012 – detta samtidigt som den totala folkmängden bara ökat med 17 %. Vad innebär det att åldras i Sverige? Sverige är ett av de få länder som har en äldreomsorg som omfattar alla oavset
Ever since Brunnby Church was first erected it has been altered and it has crossed boundaries in terms of both religious and national affiliation - from a Catholic to a Lutheran place of worship and from being a Danish to being a Swedish church. The boundaries around and within the church itself have changed, and have become displaced as new forms of worship have been introduced. Boundaries and in
