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  • 1
    Electronic Resource
    Electronic Resource
    Digital imaging colposcopy, image analysis and quantification of the colposcopic image (1994)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 101 (1994), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective To investigate the use of a digital imaging system for colposcopy, its use for image analysis and quantification of the colposcopic features that may predict histological outcome as defined by large loop excision of transformation zone.Design Prospective programme study of all patients undergoing colposcopy for cytological abnormalities.Setting Dudley Road Hospital, Birmingham.Subject Fifty consecutive patients having cytological and colposcopic abnormality treated with large loop excision of transformation zone formed the study group.Main outcome measures Pretreatment and colposcopic features correlated with histological diagnosis of excised transformation zone.Results Index cytology and current smoking status are the most important variables for prediction of histological diagnosis. Other important variables are focality of lesion, surface pattern, intercapillary distance and degree of acetowhiteness.Conclusion Digital imaging colposcopy allows image capture, processing and objective analysis. This methodology holds advantages for basic and clinical research, teaching, diagnostics and clinical audit. The system can act as a quality control tool for colposcopy units. This system should prove invaluable for further quantitative studies, for natural history studies and for those patients with deferred treatment of their cytological and colposcopic abnormalities. The statistical models described may be incorporated into the system and can aid the colposcopist in management of the woman with abnormal cervical cytology and colposcopic abnormality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1994.tb13116.x
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  • 2
    Electronic Resource
    Electronic Resource
    Peptidases, Peptides, and the Mammalian Blood–Brain Barrier (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 60 (1993), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1993.tb03223.x
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  • 3
    Electronic Resource
    Electronic Resource
    The magnetic and structural properties of pulsed laser deposited epitaxial MnZn–ferrite films (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 1676-1680 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic and structural properties of pulsed laser deposited MnZn–ferrite films have been examined. The results show that the uniaxial anisotropy, ferromagnetic resonance linewidth and coercive force are strongly influenced by the microstructure of the films, and the saturation magnetization and first-order magnetocrystalline anisotropy constant depend on intrinsic properties such as composition and cation site occupation. A comparison of bulk and film magnetic properties shows that the magnetic properties of the films are comparable to the bulk, which makes pulsed laser deposition ferrite films a prime candidate for thin film high-frequency microwave device applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356353
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  • 4
    Electronic Resource
    Electronic Resource
    The magnetic and superconducting properties of Pb2Sr2(R/Ca)Cu3O8, R=Pr, Ce, and Cm (abstract) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6740-6740 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The series of compounds Pb2Sr2(R/Ca)Cu3O8, (R=Ce-Tm) are known to superconduct at temperatures as high as Tc=84 K. We have studied the relationship between superconductivity and magnetism in the Ce and Pr analogs. In addition, we report the synthetic route and the magnetic properties of the actinide analog Pb2Sr2(Cm/Ca)Cu3O8. The parent compound Pb2Sr2CmCu3O8 is not a superconductor, but shows evidence of long range magnetic ordering at about 18 K. This is a much higher temperature than is observed for any of the other R-ion parent compounds. These results will be discussed in terms of the different hybridization and bonding properties of the 4f and 5f electrons, and how these differences influence superconductivity. These results will be compared with the Pr and Cm analogs of the other superconducting series RBa2Cu3O7 and R2−xThxCuO4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356856
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  • 5
    Electronic Resource
    Electronic Resource
    Analysis of the crystal-field spectra of the actinide tetrafluorides. II. AmF4, CmF4, Cm4+:CeF4, and Bk4+:CeF4 (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 8277-8289 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report a systematic analysis of the crystal-field spectra of four fluoride compounds containing tetravalent actinide ions. The first part of this work [J. Chem. Phys. 95, 7194 (1991)] provided interpretation of the absorption spectra of UF4, NpF4, and PuF4. To extend our analysis to heavier elements of the series, low-temperature absorption spectra of AmF4 and CmF4, and site selective laser-induced emission and excitation spectra of Cm4+:CeF4 and Bk4+:CeF4 were obtained. A model energy level calculation was found to be in good agreement with the experimental results. It is shown that the crystal-field interaction in combination with spin–orbital coupling results in significant J mixing in the excited states, but ground state wave functions are still relatively pure in J character for the tetravalent actinide ions Am4+, Cm4+, and Bk4+. Trends in the parameters of the effective operator Hamiltonian are compared with those of a Hartree–Fock free-ion model. Interpretation of the ground-state splitting of the nominal S-state ion Bk4+ in CeF4 and color center formation in AmF4 are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468093
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  • 6
    Electronic Resource
    Electronic Resource
    Minimal/mild endometriosis and infertility. A review (1989)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 96 (1989), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1989.tb02422.x
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  • 7
    Electronic Resource
    Electronic Resource
    A comparison of prostaglandin E2 pessaries and laminaria tents for ripening the cervix before termination of pregnancy (1985)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 92 (1985), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary. Forty primigravid womcn aged 15–45 years were randomly allocated to receive either an intravaginal pessary of 3 mg prostaglandin E, (PGE2) or an intracervical 5-mm laminaria tent (LT) 12–16 h before termination of pregnancy at 6–14 weeks gestation. The degree of dilatation of the cervix a t operation and its resistance t o further dilatation during the procedure were assessed by a ‘blind’ operator. Laminaria tents were more effective in achieving dilatation and softening of the cervix than were PGE2 pessaries and in 40% of women no further dilatation was necessary. There were no associated side-effects or complications. A cervical tear occurred in two of 20 patients treated with PGE2 pessaries and all 20 required further dilatation of the cervix. Laminaria tents provide a simple. safe, acceptable and effective means of ‘ripening’ the cervix prior to termination of early pregnancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1985.tb01358.x
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  • 8
    Electronic Resource
    Electronic Resource
    Cervical stenosis after cone biopsy during post-pregnancy amenorrhoea (1989)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 96 (1989), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1989.tb01591.x
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  • 9
    Electronic Resource
    Electronic Resource
    Defect generation in silicon dioxide from synchrotron radiation below 41 eV (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 379-382 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Generation of fixed positive charge, neutral electron traps, and fixed negative charge in SiO2 due to exposure to x radiation in the photon energy range below 41 eV from a synchrotron source is reported. For constant incident x-radiation exposure levels of 120 mJ/cm2 with both monochromatic and broadband radiation, the number of defects generated in the monitoring devices was at or below the detection limit of the equipment. This is in sharp contrast with the results obtained at photon energies above 300 eV reported earlier [C. K. Williams, A. Reisman, P. K. Bhattacharya, and W. Ng, J. Appl. Phys. 64, 1145 (1988)] in which a large number of each of the three defects mentioned above were generated. The lack of damage indicates that the problems associated with x-ray-induced insulator damage due to x-ray lithography may be solved by tailoring the photon energy, provided suitable mask and photoresist materials can be developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343886
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  • 10
    Electronic Resource
    Electronic Resource
    Chemically homogeneous fine-grained Mn-Zn ferrites by spray drying (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2014-2016 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Chemically and structurally uniform Mn-Zn ferrites have been produced using powders synthesized by the spray decomposition of mixed, aqueous Mn, Fe, and Zn nitrate solutions. The particle size of the as-formed powder depended strongly on the metal ion concentration in solution; higher concentrations produced larger sizes. The as-formed particles are spherical, internally hollow, and consisted mostly of Fe2O3. A 900 °C, 6-h argon treatment removed the internal void space and converted the particles mostly to the ferrite spinel phase. Sintering of compacts from heat-treated powders produced microstructures superior to those from as-formed powders. Uniform, fine-grained materials, with a densification level comparable to that of commercial sintered ferrite, have been produced at the very low sintering temperature of 1100 °C. Preliminary work indicates that a higher initial permeability is obtained when a higher sintering temperature was used and the level of its disaccommodation depended on the oxygen partial pressure present during sintering. Both "accommodation'' and disaccommodation were observed in the permeability; their magnitudes depended on the peak value of the applied excitation field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342893
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