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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Discrete & computational geometry 20 (1998), S. 307-331 
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. This paper considers the following problem, which we call the largest common point set problem (LCP): given two point sets P and Q in the Euclidean plane, find a subset of P with the maximum cardinality that is congruent to some subset of Q . We introduce a combinatorial-geometric quantity λ(P, Q) , which we call the inner product of the distance-multiplicity vectors of P and Q , show its relevance to the complexity of various algorithms for LCP, and give a nontrivial upper bound on λ(P, Q) . We generalize this notion to higher dimensions, give some upper bounds on the quantity, and apply them to algorithms for LCP in higher dimensions. Along the way, we prove a new upper bound on the number of congruent triangles in a point set in four-dimensional space.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    International journal of cosmetic science 26 (2004), S. 0 
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A typical formula for shampoo containing cationic polymers and anionic/amphoteric surfactants exhibits liquid–liquid phase separation under certain conditions when the shampoo is diluted with water upon the actual use in bathroom. The lower dense phase is considered to be an insoluble complex formed with the cationic polymer and mixed surfactants. Generally, this associative liquid–liquid phase separation is called ‘coacervation’ and the phase of complex is called ‘coacervate’. Although it is well known that the usage texture of shampoo is influenced by coacervate, there are only a few reports about their relationship. In this work, we studied the properties of coacervate and its effect on the usage texture of shampoo, particularly focusing on the effect of the cationic polymer structure. We prepared five different model shampoos that contain various cationic polymers and studied the effect of the characteristics of the polymers on the condition of the complex formations, the amount of coacervate, the rheological properties and the adhesive behaviour of coacervate on the surface of damaged hair. It was found that both the structure and the degree of substitution of cationic polymer drastically changed the condition of coacervation. Moreover, the cationic polymers showed remarkable effect on the rheological properties and the adhesive behaviour of the coacervate on the damaged hair. These results implied that we could control the usage texture of shampoo by choosing proper cationic polymers to control coacervation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biophysical Chemistry 44 (1992), S. 113-127 
    ISSN: 0301-4622
    Keywords: Bovine pancreatic tripsin inhibitor ; Creighton's renaturation experiment ; Disulfide bond ; Intermediate state ; Island model
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Annals of biomedical engineering 12 (1984), S. 29-48 
    ISSN: 1573-9686
    Keywords: Test circulatory system ; Artificial heart ; Cardiac functions ; Venous return curves ; Mean circulatory pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract A new test circulatory system (TCS) has been developed for thein vitro testing of artificial hearts (AH) and for research in cardiovascular engineering, when connected to an AH that mimics the natural heart. The TCS is controlled by five variables whereby the slopes of the systemic and pulmonary venous return curves and the mean circulatory pressure can be fixed. It allows us to observe the mutual influence between TCS and AH characteristics and particularly the blood volume distribution, the pressure distribution, and the flowrates in steady-state conditions and (in the near future) also in dynamic conditions. A steady-state mathematical analysis describing the TCS is reported. Numerical results for the human circulatory system at different levels of activity and in physiologic conditions are shown. A first prototype of the TCS has been working for more than one year. The experimental results are in agreement with the mathematical analysis.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-9686
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract The objectives of total artificial heart (TAH) research are twofold: (1) clinical use for total replacement of an irreversibly diseased heart; and (2) experimental use for studies in basic medical science, especially in the field of circulatory physiology. This paper is related to the second objective and one of the preliminary reports on experiments along this line. The results demonstrate the possibility of determining the venous return curve (VRC) and the resistance to venous return (RVR) in completely awake calves with an orthotopically implanted TAH. Our air-driven TAH was made of silicone rubber. Calves used weighed from 80 to 90 kg. Studies were performed following their recovery from the implantation surgery. The process of RVR determination was as follows: (1) The original equilibrium point (A) of the cardiac output (CO) and VR was determined, (2) the second equilibrium point (B) with a reduced CO was determined, (3) the VRC was constructed from points A and B which should be on the same VRC, (4) the momentary mean systemic pressure (MSP) was obtained at the point of interception of the VRC and abscissa (right atrial pressure (RAP)), and (5) thus, RVR was calculated from the equation (MSP—RAP)/CO. Calculated RVR ranged from 0.09 to 0.28 mm Hg/ml/sec under the conditions of these experiments.
    Type of Medium: Electronic Resource
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