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Time-dependent Transport through Quantum Dot in Dissipative Environments
오정현,Jung Hyun OH,안도열,이혁재,S. W. HWANG 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.3
Time-dependent currents through a quantum dot are investigated theoretically by adopting the geometry of radio-frequency single-electron transistors. Using the formalism taking non-adiabatic and dissipative-environment eects into account, we solve the problem numerically and nd that tunneling currents through the quantum dot have larger values in non-adiabatic cases than in adiabatic ones. Even though a coaxial-cable resistance of 50 in a tank circuit is much smaller than a resistance quantum, the system is found to become dissipative as the quality factor increases.
소음성 난청 환자에서 소음 노출 기간에 따른 주관적 이명의 변화
오정현,심주환,조성일 대한이비인후과학회 2018 대한이비인후과학회지 두경부외과학 Vol.61 No.12
Background and Objectives Tinnitus, a common complaint of workers who are exposedto noise, can cause substantial negative effects on the quality of life of these workers. The aimof this study was to analyze the characteristics of tinnitus in patients with noise-induced hearingloss and the relationship between tinnitus and the duration of noise exposure. Subjects and Method Thirty-three patients with subjective tinnitus and noise-induced hearingloss were included in this study. Tinnitus questionnaire, Tinnitus Handicap Inventory (THI)and audiological examinations were investigated according to the duration of noise exposure. Results There was a significant correlation between the tinnitus loudness and the durationof noise exposure. Patients who had longer periods of noise exposure had a louder tinnitus andhigher THI score. However, there is no significant correlation between the characteristics oftinnitus and aging process. Conclusion The duration of noise exposure influences the loudness and distress of tinnitus. An awareness of tinnitus should be considered as part of hearing conservation program.