[en] This textbook contains the following main topics: Heat conductivity, convection, condensation and evaporation, radiation heat transfer and heat exchangers. It includes the physical foundations for all these aspects and many examples. (orig.)

[en] In transversal computer tomography apparatus, in which the positioning zone in which the patient can be positioned is larger than the scanning zone in which a body slice can be scanned, reconstruction errors are liable to occur. These errors are caused by incomplete irradiation of the body during examination. They become manifest not only as an incorrect image of the area not irradiated, but also have an adverse effect on the image of the other, completely irradiated areas. The invention enables reduction of these errors

[en] The top quark is the heaviest elementary particle observed to date. Its large mass makes the top quark an ideal laboratory to test predictions of perturbation theory concerning heavy quark production at hadron colliders. The top quark is also a powerful probe for new phenomena beyond the Standard Model of particle physics. In addition, the top quark mass is a crucial parameter for scrutinizing the Standard Model in electroweak precision tests and for predicting the mass of the yet unobserved Higgs boson. Ten years after the discovery of the top quark at the Fermilab Tevatron top quark physics has entered an era where detailed measurements of top quark properties are undertaken. In this review article an introduction to the phenomenology of top quark production in hadron collisions is given, the lessons learned in Tevatron Run I are summarized, and first Run II results are discussed. A brief outlook to the possibilities of top quark research at the Large Hadron Collider, currently under construction at CERN, is included. (Orig.)

[en] The analysis of two photon physics at the e⁺e^- storage ring PETRA is reviewed. Higher order QED processes e⁺e^- → e⁺e^-e⁺e^-(e⁺e^-μ⁺μ^-) have been measured in good agreement with the QED calculations. The production of the f⁰ resonance has been investigated and the radiative width has been determined. The total cross section sigma(Q²,W) of the inelastic electron photon scattering has been studied in some detail. Evidence for the production of large Psub(T) jets in the reaction γγ → qanti q is reported and a first measurement of the photon structure function in deep inelastic eγ scattering is discussed. (orig.)

[en] This textbook contains the following main topics: Heat conductivity, convection, condensation and evaporation, radiation heat transfer and heat exchangers. It includes the physical foundations for all these aspects and many examples. (WL)

[en] This textbook contains the following main topics: Heat conductivity, convection, condensation and evaporation, radiation heat transfer and heat exchangers. It includes the physical foundations for all these aspects and many examples. (orig.)

[en] The radiation sources and detectors are arranged each on one half of an annulus. By means of an arrangement of screens the detectors for the X-radiation can be irradiated in such manner that one detector area at a time is hit by the transmitted radiation and another area only be the scattered radiation. By subtraction of the partial output signals of both detector areas the error portion in the output signal caused by the scattered radiation is eliminated. (RW)

[en] Strength calculations are presented for plastic steel components. A general analysis of mechanical behaviour is followed by information on apparatus and pressure vessel engineering and on materials. (orig./GL)

[en] The body is penetrated by a wedge-shaped ray bundle e.g. x-rays. The spatial distribution of the radiation is measured by an array of detectors. To keep the dose of radiation as small as possible for parts of the body external of the diagnostic region, a two-piece damping body is arranged in the path of rays between radiation source and body. The whole system radiation-source-detectors-damping body can be rotated around the body. The size of the two parts of the damping body increases stepwise from the outside to the inside, by which an attenuation at the radiation follows in practice only out of the diagnostic region. The two partial bodys delimit the ray bundle like a stop and they are also adjustable. (RW)

[en] The X-ray beam is fan-shaped. The radiation penetrating the body is picked up by a number of detectors arranged side by side. The measured values of absorption are fed to the circuit of the computer tomograph. The computer system controls the dose applied to the patient and the thermal load of the tube without affecting the accuracy of the measurements. (RW)