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  • 1
    Electronic Resource
    Electronic Resource
    Invariants for the time-dependent harmonic oscillator (1988)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 29 (1988), S. 1580-1587 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: A systematic method is presented for the construction of invariants for the damped oscillator under the action of a driving force and for the N-dimensional isotropic or anisotropic oscillator. Invariants for time-dependent oscillators are obtained by canonical transformation. The treatment holds in both classical and quantum mechanics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.527905
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  • 2
    Electronic Resource
    Electronic Resource
    Correlation of Quantitative Risk Results for High Hazard Processes (2003)
    350 Main Street , Malden , MA 02148 , USA , and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Publishing, Inc.
    Risk analysis 23 (2003), S. 0 
    Details
    ISSN: 1539-6924
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: A quantitative risk analysis was conducted to evaluate the design of the VX neutralization subsystem and related support facilities of the U.S. Army Newport Chemical Agent Disposal Facility. Three major incidents including agent release, personnel injury, and system loss were studied using fault tree analysis methodology. Each incident was assigned a risk assessment code based on the severity level and probability of occurrence of the incident. Safety mitigations or design changes were recommended to bring the “undesired” risk level (typical agent release events) to be “acceptable with controls” or “acceptable.”
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1539-6924.00371
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Risk factors for pressure sores in the critically ill (2000)
    Oxford : Blackwell Science Ltd
    Anaesthesia 55 (2000), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Pressure sore development in the critically ill is a well-recognised problem and several risk factors have been put forward as being relevant; however, none has been proved valid in this population. This study examines the effects of specific risk factors for the development of pressure sores in the critically ill. Data on 22 specific risk factors were recorded every 8 h. Of 286 patients who were identified as having a minimum set of three predetermined risk factors, 77 developed pressure sores. Using univariate regression analysis, 18 of the 22 specific factors were identified as being significant (p 〈 0.05) in the development of pressure sores. Multivariate analysis identified five of these 18 specific risk factors as being independently significant (p 〈 0.05) in pressure sore development. These five factors were norepinephrine infusion, APACHE II score, faecal incontinence, anaemia and length of stay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2044.2000.01216.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A laboratory comparison of two techniques of emergency percutaneous tracheostomy (1997)
    Oxford, UK : Blackwell Science Ltd
    Anaesthesia 52 (1997), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This laboratory study was designed to compare the speed of placement of a percutaneous tracheostomy using two common methods and to evaluate any damage caused to the trachea. The same operator who was experienced with both techniques placed 10 percutaneous tracheostomies into a pig tracheal model, five using the Griggs tracheostomy forceps technique and five using the Ciaglia sequential dilatation technique. Placement of the tracheostomy was significantly faster using the Griggs technique (mean 89 s, range 69–105 s) than using the Ciaglia sequential dilator technique (mean 217 s, range 180–267 s). Damage to the posterior wall was noted in four of the tracheas. We concluded that the Griggs technique is rapid and in trained hands may be suitable for emergency airway access. In addition, the pig trachea model is easy to set up and provides a very useful training tool.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1997.251-az0385.x
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  • 5
    Electronic Resource
    Electronic Resource
    Elevated hypothalamic neuropeptide-Y concentrations in rats fed a palatable diet - effect of d-fenfluramine
    Amsterdam : Elsevier
    Regulatory Peptides 30 (1990), S. 59 
    Details
    ISSN: 0167-0115
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-0115(90)90182-V
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  • 6
    Electronic Resource
    Electronic Resource
    The use of vibration measurements for quality control of machine tool spindles (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 889-893 
    Details
    ISSN: 1433-3015
    Keywords: Quality ; Spindles ; Vibration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The assembly of machine tool spindles results in a degree of variability in the effective stiffness of the bearings. This may result in a poor machining performance if the bearing stiffnesses are below their specified design values. Alternatively, the life of the bearings may be reduced if the bearings stiffnesses are above the design values because of excessive preload. This paper describes a method of checking the spindle assembly by making vibration measurements. From these measurements it is possible to determine which bearings (if any) are not at their design stiffness. This then allows appropriate adjustments to be made to ensure the assembled spindle is close to the design specifications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179078
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Mixture equations of state: Composition dependence (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 373-380 
    Details
    ISSN: 1572-9567
    Keywords: composition dependence ; equation of state ; hybrid mixing rules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper discusses theoretical models for the composition dependence of equations of state and compares the quality of predictions against experimental thermodynamic property data. The mean density approximation (MDA) and the van der Waals one-fluid (VDW1) model are compared with hybrid mixing rules (HMR), in which rigorous composition dependence is used for the second and third virial coefficients and the conformai solution model is used for equation-of-state density terms beyond the third virial term. It is found that when values of unity are used for all binary and three-body unlike interaction parameters, calculated densities for methane-normal heptane mixtures have average absolute deviations of 3.54% for MDA, 4.04% for VDW1, and 2.59% for HMR. When vapor-liquid equilibrium calculations were performed for the methane-normal heptane system, average absolute deviations of calculatedK values from experimental values were 16.7% for methane and 36.4% for normal heptane using HMR, whereas when conformal solution model (CSM) mixing rules were used, the results were 34.8% for methane and 66.7% for normal heptane. When the binary interaction parameter for the characterization of interaction energies is determined, it is found to be less sensitive to state conditions in the case of HMR than either MDA or VDW1. These preliminary results suggest the potential of mixture equation-of-state methods which utilize rigorous composition dependence for the lower-order virial coefficients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01133568
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