Sonderdruck / Schriftenreihe der Georg-Simon-Ohm-Hochschule, Nürnberg
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1
Eurosystem
(2007)
2
Zur exakten Auslegung von Kälteversorgungssystemen mit Kältespeichern (i.a. Eisspeicher) ist die Kenntnis des Kühllastprofils notwendig. Durch Aufsummierung und Bilanzierung über der Zeit können Aussagen über die Größen des Speichers und der Kälteanlage getroffen werden. Vielfach müssen aber in frühen Planungsphasen vereinfachte Annahmen über den Verlauf der Kühllast getroffen werden. Es wird gezeigt, daß sich schon auf der Basis dieser Annahmen Aussagen über die Größe von Eisspeicheranlagen treffen lassen. Dazu werden dimensionslose Kennzahlen eingeführt, die unabhängig von der Art des Speichersystems und der Art der Kälteanlage nur über das Kühllastprofil definiert sind. Im Speziellen wird für Auslegungen in der Technischen Gebäudeausrüstung ein verkürztes Abschätzungsverfahren dargestellt, das in einem frühen Planungsstand verwendet werden kann.
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The dynamic behaviour of a railway bogie has been investigated by using a mathematical model, a space state equation, for simulation with a computer. The comparison of a damped with a undamped bogie demonstrated that the driving stability at high speeds can be uprated after the installation of dampers acting in driving direction and allaround the vertical rotation axis of the bogie. The maximum speed of the damped bogie has amounted t0 76 m/s.
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Online Measurement of mechanical parameters by using CAM (Computer Aided Measurement) is a new advanced technique in the field of measurement. Taking special measurement software DASYLab as an example, this paper describes the basic principles and unique advantages of this technique. The application of CAM is explained through an example of measurements of temperature, flow rate and pressure.
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Knowledge of the features and qualities of a machine element are essential foundations for its successful operation. High grade materials, more accurate calculation methods and modern manufacturing processes lead to continuous design and performance improvements and hence increased power within minimised spatial requirements. INA cylindrical roller bearings, series SL 1923.., ZSL 1923.. and LSL 1923.. follow this trend and due to their high performance characteristics and low physical volume they have obtained a firm place as high performance machine elements. Essential characteristics of radial cylindrical roller bearings are their behaviour regarding kinematics, noise, vibration, dynamic frictional torque, cage speed, speed of a rolling element, slip etc. The paper gives details of the kinematic behaviour concerning the relationship between the roller set speed or the cage speed and the speed of a rolling element in connection with the occurrence of smearing. This kind of damage occurs during the running in stage of a machine and is becoming very important because of the enormous costs which are caused by down time and lost production.
6
Es wird ein Verfahren beschrieben, das dazu dient, den Standort eines künftigen digitalen Kurzwellen-Rundfunkempfängers allein auf Grund der empfangbaren Sender zu bestimmen. Die prinzipielle Eignung des vorgeschlagenen Verfahrens wird an Hand von Versuchen mit analogen Rundfunksendern und Amateurfunksendern nachgewiesen.
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This paper is dealing with teaching and leadership. As a contribution to the current discussion of the position and the role of professors at universities in Europe, a phenomenological-humanistic approach will be outlined (as part one). This approach has been applied to the feedback data by 3302 students from Germany and other countries evaluating their lectures of one professor from 1969 to 2000. The survey data were collected by the technique named "Semantic Differential" developed by Osgood and elaborated by Hofstätter. Interestingly, a remarkable pattern constituted by students´ attributions to their learning processes with the author has emerged from the late sixties to the actual millennium. Part two of this paper reflects statements of colleagues and students from all parts of Germany and abroad, too. In addition, a frame-work of socalled pedagogical leads as an underlying principle will be outlined. And the parts three and four offer typical examples of this approach to teaching. Part three presents a record of an old but still actual excursion in synectics titled "How our students of 1974 saw our world of 2000" elaborated by students of engineering and economics enrolled 1974. Finally, the part four comes with an actual example of our examinations for students of engineering enrolled in the compulsory / optional subject "Personality and creativity training".
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This paper compares the Federal Reserve System and the Eurosystem in four aspects. These are the institutional level, the monetary policy instruments, the operational framework and the monetary policy strategy applied. It highlights the similarities, the differences as well as the efficiency of the different settings.
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This paper discusses the possibilities of IPtechnologies for information protection. An analysis of modern information protection Soft-Cores which support symmetric block ciphers is given. Development perspectives of the Soft-Cores are described. The DES Algorithm and the variations of the architecture of the DES Soft-Core models are considered, their analysis provided and they are compared with some existing DES Soft-Cores on the world market. Two architectures - iterative and pipelined - are identified. Twenty six variations of the DES Soft-Core are proposed and a comparative analysis of their architecture is given. The proposed DES Soft-Cores support all of the discussed functional possibilities. Thus a high performance is achieved, the equipment volume for their realization is lowered and they can be used effectively in a wide spectrum of the application fields.
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Die experimentelle Realisierung des Strahlungsdrucks hat zur Entwicklung von Manipulatoren für Mikropartikel geführt. Zum tieferen Verständnis der Entstehung des Drucks wird als einfaches Beispiel der Strahlungsdruck auf eine ebene Platte und die mechanische Spannung in der Platte bei senkrechtem Strahleinfall berechnet. Dabei wird sowohl das Wellenmodell als auch das Teilchenmodell der Optik verwendet. Es zeigt sich, daß letzteres einfacher zu handhaben und anschaulicher ist.