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  • 1
    Electronic Resource
    Electronic Resource
    The uniqueness and approximation of a positive solution of the Bardeen–Cooper–Schrieffer gap equation (2000)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 41 (2000), S. 6007-6025 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: In this paper we study the Bardeen–Cooper–Schrieffer energy gap equation at finite temperatures. When the kernel is positive representing a phonon-dominant phase in a superconductor, the existence and uniqueness of a gap solution is established in a class which contains solutions obtainable from bounded domain approximations. The critical temperatures that characterize superconducting–normal phase transitions realized by bounded domain approximations and full space solutions are also investigated. It is shown under some sufficient conditions that these temperatures are identical. In this case the uniqueness of a full space solution follows directly. We will also present some examples for the nonuniqueness of solutions. The case of a kernel function with varying signs is also considered. It is shown that, at low temperatures, there exist nonzero gap solutions indicating a superconducting phase, while at high temperatures, the only solution is the zero solution, representing the dominance of the normal phase, which establishes again the existence of a transition temperature. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1286424
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  • 2
    Electronic Resource
    Electronic Resource
    Repetitive Post-Synaptic Discharge in a Sensory Nucleus (1953)
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 844-845 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Extensive electrophysiological studies in this laboratory have shown that the optic nerve and tract contain two groups of fibre sizes. This is clearly shown when only the crossed or uncrossed components of the optic tract are stimulated separately. The fibre groups in the crossed pathway, however, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/171844a0
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  • 3
    Electronic Resource
    Electronic Resource
    On the Oxygen Spectral Line λ= 5577·35 Å.U (1926)
    [s.l.] : Nature Publishing Group
    Nature 118 (1926), S. 441-441 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A NUMBER of investigators, including Merton, Barratt, Johnson, Cameron and others, have shown that the spectrum of an element in the gaseous state can be profoundly modified if an electric discharge be passed through it when one or other of the rare gases helium, neon, argon is mixed in excess ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/118441a0
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  • 4
    Electronic Resource
    Electronic Resource
    The Raman Effect with Liquid Oxygen, Nitrogen, and Hydrogen (1929)
    [s.l.] : Nature Publishing Group
    Nature 123 (1929), S. 160-160 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN some experiments we recently made to see if a Raman effect could be observed with homopolar molecules, we found that the spectrum of the light scattered by liquid air included six sharp and clearly defined lines not included in the irradiating light, which was that from the mercury arc. The ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/123160a0
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  • 5
    Electronic Resource
    Electronic Resource
    Marker and radioactive silicon tracer studies of PtSi formation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 2232-2241 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Marker and radioactive 31Si experiments have been performed to investigate atomic diffusion during PtSi formation. The marker work used a thin metallic layer (Ti, Co, Ni) as a marker. Analysis of the marker displacement indicated growth dominated by silicon diffusion (∼90%). The interpretation of data from the radioactive tracer experiments is less clear cut. However, when examined in conjunction with the marker results, it would appear that either PtSi growth took place by silicon substitutional diffusion or by a mixed interstitial mechanism (i.e., a mixture of interstitial and interstitialcy diffusion). Arguments are presented to suggest that silicon vacancy diffusion during silicide growth is the most likely mechanism. This interpretation is found to be generally consistent with other recently published work on PtSi formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351616
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  • 6
    Electronic Resource
    Electronic Resource
    The Seamless Web: Media and Power in the Post-Modern Global Village (1991)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of popular culture 25 (1991), S. 0 
    Details
    ISSN: 1540-5931
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Ethnic Sciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0022-3840.1991.2502_69.x
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  • 7
    Electronic Resource
    Electronic Resource
    Pt2Si formation: Diffusion marker and radioactive silicon tracer studies (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 230-236 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The moving species during the formation of first-phase platinum silicide, Pt2Si, by thermal annealing is identified with inert markers (Ti, Co, Ge, As) and radioactive 31Si as a tracer. Rutherford backscattering spectrometry is utilized to monitor the flow of atoms past the marker during the silicide forming reaction, while the position of the tracer after the reaction is determined by using sputter depth profiling and radioactivity measurements. Experiments with thin-film structures employing a reference marker at the substrate silicon/amorphous silicon interface and a mobile marker near the amorphous silicon/platinum interface clearly show a shift of the latter marker towards the surface of the sample. The radioactive tracer, initially embedded in nonradioactive silicon and metal, is moved from this position and concentrates at the sample surface. The outcome of both marker and tracer studies is consistent with a picture in which platinum diffuses during the formation of Pt2Si.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345286
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  • 8
    Electronic Resource
    Electronic Resource
    The pharmacokinetics of the novel promotile drug, tegaserod, are similar in healthy subjects—male and female, elderly and young (2001)
    Oxford UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 15 (2001), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Tegaserod (HTF 919) is a selective 5-HT4 receptor partial agonist in development for the treatment of irritable bowel syndrome.〈section xml:id="abs1-2"〉〈title type="main"〉Aim:This study aimed to assess the effect of age and gender on the single-dose pharmacokinetics of tegaserod.〈section xml:id="abs1-3"〉〈title type="main"〉Methods:In a parallel-group, open-label study, a single dose of tegaserod (12 mg) was administered to four groups of healthy young male, young female, elderly male and elderly female subjects (n=10 per group). Blood samples were collected from 0 to 24 h postdose. Non-compartmental pharmacokinetics evaluation and statistical analysis (ANOVA and Wilcoxon signed ranks test for tmax) were performed.〈section xml:id="abs1-4"〉〈title type="main"〉Results:Tegaserod was well tolerated in all groups. There was no effect of age or gender on tmax and Cmax. Gender did not affect AUC0–∞ and AUC0–tz; there was a statistically significant effect of age on these parameters. AUC0–∞ and AUC0–tz in the elderly were greater than in the young (AUC0–∞ ratio 1.37, P 〈 0.001; AUC0–tz ratio 1.23, P=0.029). This increase in exposure is judged not to be clinically relevant because it is within the variability in the pharmacokinetics parameters of tegaserod and because the dose–response relationship of tegaserod is relatively shallow.〈section xml:id="abs1-5"〉〈title type="main"〉Conclusions:No dose adjustment for age or gender is recommended in tegaserod therapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2001.00973.x
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  • 9
    Electronic Resource
    Electronic Resource
    Interferometric method of checking parallelism and prism angles
    Amsterdam : Elsevier
    Optics and Laser Technology 6 (1974), S. 57-58 
    Details
    ISSN: 0030-3992
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0030-3992(74)90086-3
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  • 10
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    Household Food Consumption Behaviour in St. James, Jamaica (1988)
    Kingston, Jamaica : Periodicals Archive Online (PAO)
    Social and economic studies. 37:3 (1988:Sept.) 213 
    Details
    ISSN: 0037-7651
    Topics: Sociology , Economics
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5209-1988-037-03-000009
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