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  • 1
    Electronic Resource
    Electronic Resource
    Continuous estimation of systolic blood pressure using the pulse arrival time and intermittent calibration (2000)
    Springer
    Medical & biological engineering & computing 38 (2000), S. 569-574 
    Details
    ISSN: 1741-0444
    Keywords: Photoplethysmogram ; Pulse arrival time ; Systolic blood pressure ; Noninvasive measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A continuous noninvasive method of systolic blood pressure estimation is described. Systolic blood pressure is estimated by combining two separately obtained components: a higher frequency component obtained by extracting a specific frequency band of pulse arrival time and a lower frequency component obtained from the intermittently acquired systolic blood pressure measurements with an auscultatory or oscillometric system. The pulse arrival time was determined by the time interval from QRS apex in electrocardiogram to the onset of photoplethysmogram in a fingertip beat-by-beat via an oximetric sensor. The method was examined in 20 patients during cardiovascular surgery. The estimated values of systolic blood pressure were compared with those measured invasively using a radial arterial catheter. The results showed that the correlation coefficients between estimated values and invasively obtained systolic blood pressure reached 0.97±0.02 (mean±SD), and the error remained within ±10% in 97.8% of the monitoring period. By using a system with automatic cuff inflation and deflation to acquire intermittent systolic blood pressure values, this method can be applicable for the continuous noninvasive monitoring of systolic blood pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02345755
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  • 2
    Electronic Resource
    Electronic Resource
    Fracture studies in rubber-modified acrylics. I. Experimental method: Design of sandwich-tapered double-cantilever beam cleavage specimens (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 17 (1973), S. 1909-1917 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Double-cantilever beam cleavage specimens are very useful in characterizing the fracture behavior of isotropic, homogeneous, brittle, and semibrittle polymers. However, until this time they have not been used for ductile materials such as rubber-modified polymers or polycarbonates because of excessive yielding or breakage of the specimen arms before crack propagation can occur. In order to make it possible to measure the fracture surface work of these materials, a new sandwich cleavage specimen was developed by bonding rigid reinforcement plates to both sides of the specimen sheet. With this sandwich-tapered double-cantilever beam cleavage specimen, one can create conditions under which controlled crack propagation through tough ductile materials and measurement of the fracture surface work-two previously unobtainable results-are readily determined. In this paper, the design and construction of the sandwich specimens, test procedure, and the data analysis will be discussed in detail.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1973.070170623
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  • 3
    Electronic Resource
    Electronic Resource
    Fracture studies in rubber-modified polymers. II. Experimental results: Fracture surface work of rubber-modified acrylics (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 17 (1973), S. 2053-2066 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: With the use of a sandwich-tapered double-cantilever beam cleavage specimen (described in part I of this series), the fracture surface work of several commercial and experimental acrylic multipolymers has been measured as a function of crack velocity and rubber content. The plots of fracture surface work versus crack velocity clearly exhibit the effects of rate (crack velocity) and rubber concentration on fracture behavior. Specifically, the fracture surface work of specimens with seven different rubber contents has been determined over a crack velocity range from 10-5 meters/sec to approximately 10 meters/sec. For each material, distinct maxima occur in the curves of fracture surface work versus crack velocity. The significance of these observations is discussed.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1973.070170708
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  • 4
    Electronic Resource
    Electronic Resource
    The Electronic Spectrum of Tricyclo[3.3.0.0.2,6]octa-3,7-diene (1971)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 54 (1971), S. 1081-1083 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The unusual electronic spectrum of the title compound is shown to be due to the strong interaction between the π-orbitals of the double bonds and the Walsh-orbitals of the fourmembered ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19710540416
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  • 5
    Electronic Resource
    Electronic Resource
    Photoelectron Spektra of Azabenzenes and Azanaphthalenes: II. A Reinvestigation of Azanaphthalenes by High-Resolution Photoelectron SpectroscopyPart [29] of: ‘Applications of Photoelectron Spectroscopy’, Part [28] : [1]. (1972)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 55 (1972), S. 274-288 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The bands with Iv 〈 13 eV in the photoelectron spectra of quinoline (IX), isoquinoline (X), cinnoline (XI), quinazoline (XII), and quinoxaline (XIII) have been reassigned in a way consistent with the assignment proposed for pyridine (II), the diazines (III, IV, V), s-triazine (VI), and 1,2,4,5-tetrazine (VII). The bands corresponding to the ejection of an electron from a π-orbital have been identified by a regression calculation based on a HMO perturbation treatment. It has been found that the combined through-space and through-bond interaction of the lone pairs in III, IV, V and in their corresponding benzologues XI, XII, XIII are the same within experimental error ( ±, 0.2 eV). Our assignment is also supported by an empirical correlation of the pKa, 1- values and the mean lone-pair ionization potentials of the azaderivatives I to XIII.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19720550131
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