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  • 2000-2004  (1)
  • 1995-1999  (1)
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  • 1
    ISSN: 1572-817X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract The effect of inelastic scattering on the electron reflection in multi-quantum barriers (MQBs) has been examined using the damped resonant tunnelling model for the first time. The electron reflectivity in the virtual barrier region for unstrained GalnAs/InP MQB deteriorates below 100% by about 10% for phase relaxation time of 0.22ps. We propose a strain-compensated GalnAs/GalnP MQB which not only has virtual barrier 4 times as high as that of an unstrained MQB, but whose reflectivity deterioration is reduced to less than 5% in comparison with 10% for unstrained MQB for the same phase relaxation time. We have also successfully grown a Ga0.25In0.75As (1.5% compressive) well/Ga0.25In0.75P (1.2% tensile) barrier short-period superlattice with six wells by chemical beam epitaxy, which exhibits the possibility of fabrication of the strain-compensated MQBs.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1569-8041
    Schlagwort(e): chemoradiotherapy ; combined modality treatment ; non-small-cell lung cancer
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background:Although chemoradiotherapy is standard treatment forunresectable stage III non-small-cell lung cancer (NSCLC), few long-termsurvival data exist. Patients and methods:Between October 1989 and December 1991, 74patients with histologically or cytologically proven NSCLC, unresectable stageIIIA or IIIB, were entered into this study. Seventy patients were eligible andevaluable for response, toxicity, and survival analysis. Chemotherapyconsisted of cisplatin (100 mg/m2 on days 1, 29, and 57) andvindesine (3 mg/m2 on days 1, 8, 29, 36, 57, and 64). Thoracicradiotherapy was administered for two weeks (2 Gy given 10 times, fivefractions per week), and after a 14-day rest period, the previous schedule ofradiotherapy was repeated for two weeks. A 10-Gy to 20-Gy dose of radiotherapywas administered during the third cycle of chemotherapy. Results:Of the 70 evaluable patients, 1 (1.4%) hada complete response (CR) and 51 (72.9%) had a partial response (PR).The median survival time was 14.8 months, and the five-year survival rate was14.8%. The major toxicity was leukopenia (≥ grade 3, 93%).Other toxicities ≥ grade 3 included anemia (34%),nausea/vomiting (27%), alopecia (7%), thrombocytopenia(4%), and serum creatinine elevation (1%). Treatment relateddeath occurred in two patients (2.8%). One patient died of pneumoniaand pneumothorax, and the other of hemoptysis. Conclusions:Concurrent chemotherapy and radiotherapy has thepotential to provide long-term survival with acceptable toxicities.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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