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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 970-972 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Resonant ring feedback with frequency filtering has been used for the self-generation of bright soliton trains. The solitons were produced from magnetostatic backward volume spin waves propagated in an in-plane magnetized magnetic film delay line as part of the resonant ring structure. The amplitude and phase time profiles, together with the power spectra of the self-generated pulses, confirm their bright soliton nature. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Papers in regional science 83 (2004), S. 0 
    ISSN: 1435-5957
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Abstract. Neighbouring towns in urban clusters of Canada exhibit similar levels of socio-economic development. However, when measured by different development indicators, inter-town development association differs in both nature and degree. In core areas, for instance, only population and housing variables exhibit a strong spatial association, while that of employment-related variables – average income, and unemployment rate – is weaker. This tendency reflects the fundamental difference between the two groups of variables. While population and housing variables are associated with the clustering of residents in socially homogenous areas, inter-town development similarity in respect to employment-related variables is weaker, apparently due to long-distance commuting. The article discusses the importance of urban clustering as a factor in regional development policies and programmes, and provides support for including cluster-related elements in a strategy to enhance urban growth in underdeveloped regions.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Solitons are large-amplitude, spatially confined wave packets in nonlinear media. They occur in a wide range of physical systems, such as water surfaces, optical fibres, plasmas, Bose–Einstein condensates and magnetically ordered media. A distinguishing feature of soliton behaviour that ...
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1522-1709
    Keywords: obstructive sleep apnea ; videoendoscopy ; larynx ; epiglottis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Patients with sleep-disordered breathing (SDB) suffer from repetitive upper airway occlusion. Various techniques have been described to assess the site of upper airway collapse. In most cases the soft palate or the base of tongue, or both, are the major levels of obstruction; rarely, the larynx, including the epiglottis, are found to be involved. We present five cases in which sleep videoendoscopy finally revealed the true mechanism of the inspiratory airway behavior. Two patients were sent to our service because of inefficacy of nasal ventilation therapy. One had a floppy epiglottis that was being sucked into the glottis. The other had a normal larynx during videoendoscopy. Instead, common pharyngeal collapse could be detected. Increasing the pressure normalized sleep, breathing, and videoendoscopy. The third patient showed apneas due to the adduction of the lateral parts of his omega-shaped epiglottis. In another case, inspiratory fluttering of the vocal cords caused snoring and arousals. The last case came in for bilateral vocal cord palsy with heavy nocturnal desaturations suggesting airway closure. Yet, the pharynx and larynx remained open throughout the night. Sleep videoendoscopy is a convenient method to define the level and mechanism of occlusion in obstructive SDB, particularly if the larynx is involved. It is useful to rule out airway compromise in case of recurrent nocturnal hypoxemias. Thus the results of sleep videoendoscopy have a strong therapeutical impact.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1522-1709
    Keywords: obstructive sleep apnea syndrome ; tongue base hypertrophy ; radio frequency tissue ablation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Over the last few years, different surgical techniques for the treatment of obstructive sleep apnea syndrome have been developed. While new methods for the treatment of velopharyngeal obstruction turned out to be safe and effective, treatment of hypopharyngeal obstruction due to tongue base hypertrophy has remained, in many aspects, an unsolved problem. Surgical techniques for partial resection of the tongue base (midline glossectomy, lingualplasty) are effective but very invasive procedures requiring temporary tracheotomy, and have high postoperative morbidity. A maxillofacial approach showed significant reduction in the Respiratory Disturbance Index (RDI), especially when bimaxillar osteotomies are performed. Along with the concerns of postoperative morbidity, these techniques require general anesthesia and hospitalization. Tongue base reduction with temperature-controlled radiofrequency tissue ablation was introduced in 1998, and has proven to be a safe and simple procedure. Significant reduction in RDI has been shown in the majority of the treated patients. This procedure does not require general anesthesia and has low postoperative morbidity. For curative results, tongue base reduction with radiofrequency requires multiple treatment sessions. The goal of the present study is to investigate the beneficial effect of increased amount of energy applied per treatment session, reducing the number of treatment sessions per patient. By delivering increased amounts of energy, a similar cure and/or responder rate with 2 treatment sessions, rather than 5 to 6 as published in earlier studies, was accomplished. Postoperative morbidity was similar to previously published results although there was a slight increase in postoperative complications. Apart from the reduced number of treatment sessions needed per patient, we also demonstrated the beneficial effect of prophylactic use of antibiotics in our study group. This more aggressive treatment scheme appears to be well tolerated by the patients and may be an effective means of reducing the overall number of treatments.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric radiology 4 (1976), S. 144-148 
    ISSN: 1432-1998
    Keywords: Hodgkin's disease ; children ; mediastinum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The roentgenologic features of Hodgkin's disease were studied in 105 patients under 14 years of age. The mediastinal and hilar nodes were involved in 64.7% of patients. Some consistency of extent and pattern of disease was observed in that mediastinal lymphatic lesions could be associated with cervico-supra-clavicular and retroperitoneal lesions. There was lung infiltration in 14.3% of patients and the frequency of this lesion dependent on the histological type. It was commoner in nodular sclerosis, mixed cellulatity and lymphocytic depletion. Lung infiltration usually developed in continuity with the lymphatic gland lesion and only rarely in a metastasis-like form.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 82-84 (Nov. 2001), p. 93-98 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 82-84 (Nov. 2001), p. 259-266 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 52 (1979), S. 311-318 
    ISSN: 1432-2234
    Keywords: X-ray states ; NO-radical ; ESCA and X-ray spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The influence of the reorganization effect of an electron system on potential energy curves of X-ray excited states of the radical nitric oxide has been investigated by the restricted Hartree-Fock method. A dominating role of this collective effect in forming fine vibrational structures in ESCA and X-ray Kα emission spectra of this radical has been shown by such calculations.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-0778
    Keywords: keratinocytes ; matrigel ; rat ; wound healing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The influence of matrigel, a mixture of the components of thebasement membrane, on the wound healing was studied in a modelof experimental wounds in rats. Matrigel was found to increasethe rate of epithelization of split-thickness wounds. The modelof deep wound was developed in which the host animal could notprovide enough migrating and proliferating keratinocytes tocover the wound area. The model is relevant to severe burns andinjuries in humans. When rat keratinocyte suspension wastransplanted into deep wounds, cell retention in the wound bedwas only observed if matrigel was added together with the cells.Increasing matrigel concentration in the wound was seen toenhance the rate of wound area coverage by the cells. Althoughthe process of healing seemed macroscopically normal, afterhistological screening of the biopsies cell in the wouldappeared as amorphous aggregates and tubules rather thenstratified epidermis.
    Type of Medium: Electronic Resource
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