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dSPACE 보드에 의한 적응소음제거의 실시간 시뮬레이션
정원용,이영철,김태효 慶南大學校 附設 工業技術硏究所 1999 硏究論文集 Vol.17 No.-
정보통신망의 급격한 발전으로 더욱더 정확하고 빠른 정보통신시스템이 그 어느 때보다 요구되나 통신망에 존재하는 여러 가지 소음 등으로 양질의 정보를 취득, 전송하는 것이 쉽지 않다. 본 논문에서는 dSPACE DS 1103보드와 적응소음제거(ANC) 알고리즘으로 여러 가지 소음 중 가장 일반적인 백색잡음에 오염된 음성신호로부터 원래의 깨끗한 음성신호를 실시간적으로 추출하려고 한다. 결과적으로 DS 1103보드의 실시간 처리 구현의 편리함은 탁월하게 보여졌으나, NLMS 알고리즘의 계산속도의 한계로 정확하게 소음이 제거된 원래의 음성신호 파형을 얻을 수 없었지만 어느 정도 음성의 내용을 인지 할 수 있는 수준의 신호 파형을 얻을 수 있었다. Because of the extremely fasts growing expansion of the information communication networks, the more accurate and fast information transfer between communication systems is required more than ever. It is desired to denoise in the networks to transfer and store the good qualify information. In this paper, dSPACE DS 1103 real-time DSP board is used to denoise the white noise which contaminate the original speech signal with the Adaptive Noise Cancellation (ANC) algorithm. As a results, dSPACE board is a very powerful device for the noise reduction, because of the easy processing, simple manipulation and fast implementation of the ANC system. The simulation result also give us a significant noise reduction from the contaminated speech signal with the real-time processing.
한국 시민윤리교육 실태조사 (Ⅰ) : 14세 학생의 시민윤리적 지식과 개념을 중심으로
박효종,손경원 한국국민윤리학회 2003 倫理硏究 Vol.54 No.1
전 세계적으로 민주주의는 시대정신으로 부각되고, 한국 역시 민주주의의 공고화 단계에 진입한 이시기에, 민주주의 확립과 발전을 위한 민주적 시민의 자질과 시민윤리교육에 대한 관심이 증가하는 것은 당연한 일이다. 본 연구의 목적은 시민의 교육방향을 설정하는데 좌표가 될 수 있는 한국의 14세 학생이 갖는 민주주의와 시민성에 관한 지식과 개념을 조사하였다. 그리고 28개국의 IEA 시민윤리교육의 연구결과와 비교하여 보다 분명하게 한국 학생이 갖는 지식과 개념의 특징을 파악하고자 하였다. 한국의 14세 학생들의 시민윤리적 지식과 개념에 관한 조사결과, 시민윤리교육에 대한 낙관적 전망과 개선의 요구들이 동시에 존재함을 발견하였다. 한국의 14세 학생들은 개략적이지만 민주주의의 기본제도와 원리를 알고 좋은 시민의 개념을 파악하고 있으며, 선거나 환경, 공동체 돕기와 같은 활동에의 참여가 중요함을 인식하고 있다. 하지만 민주주의의 공고화라는 시대적 과제를 감안한다면 학생들의 지식과 개념의 이해는 만족스럽지 못했다. 이에 시민윤리교육의 방향에 대해 세가지 제언을 하였다. 첫째, 14세 학생들의 민주주의와 시민성에 대한 지식과 정보해석능력은 국제평균에 비해 상당히 낮기에, 민주주의와 시민성에 관한 지식과 능력을 개선할 수 있는 보완책이 마련되어야 한다. 둘째, 민주주의에 대한 이해가 피상적이고 권리 중심적이어서 민주주의에 대한 심층적 이해와 권리에 수반되는 책임의 인식이 요구된다. 셋째, 준법에 대한 인식의 개선이 요구되며, 시민참여의 중요성을 알고 긍정적 태도를 지니고 있으나 계속적으로 강조할 필요가 있다. As interactive toward democratic reform took place across world, Korea, entered the phase of consolidating democracy, began to pay attention to the conceptions of democratic relationship and civic education. Taking into consideration the importance of preparing young people for democratic citizenship, this actually attempted to examine civic knowledge and civic concept of young people at age fourteen in Korea. It's approach is comparative in the sense that civic attitude of Korean young people is compared to that of young people in 28 countries that IEA civic education investigated. This actually dealt with civic knowledge and civic concept with regard to young people at age fourteen in Korea. The scales of civic knowledge and concepts included student's knowledge test of civic content and the skills of interpreting information, civic concepts such as democracy and citizenship, government responsibility. The results showed that Korean young people demonstrated a satisfactory level of basic civic knowledge and concept of democracy and citizenship, although their understanding sometimes appear superficial. This actually concludes that revival of civic engagement needs to develop any young people at age fourteen in Korea. Moreover, with regard to civic Knowledge and concept of democracy and citizenship, they need to be encouraged to fully understand and to be inculcated. We should improve their conception of obeying the law as well.
Chong Hyo Won,Son Jun Seok,Chae Chang Ho,Jae Changho 대한직업환경의학회 2023 대한직업환경의학회지 Vol.35 No.1
Background: Efforts for the prevention and management of cardiovascular diseases (CVDs) in workers have been actively pursued. Obesity is one of the important risk factors related to CVDs. Obesity has various metabolic characteristics, and some individuals can be metabolically healthy. Body composition including skeletal muscle mass is known to have protective effect in obesity. The study aims to investigate the association between skeletal muscle mass and Korea Occupational Safety and Health Agency (KOSHA) CVD risk among obese male manufacturing workers in Korea and to identify appropriate indicators of skeletal muscle mass for predicting risk of CVDs. Methods: The study was conducted on 2,007 obese male workers at a manufacturing industry aged more than 19 years. Skeletal muscle mass, skeletal muscle index (SMI), skeletal muscle mass percent (SMM%) and skeletal muscle to body fat ratio (MFR) were used to evaluate body composition and these indicators were divided into quartiles. The odds ratios (ORs) and 95% confidence intervals (CIs) for the KOSHA CVD risk groups according to quartiles of skeletal muscle mass indicators were estimated using ordinal logistic regression analysis. Results: The OR for the KOSHA CVD risk groups in the highest quartile of SMI was 1.67 (95% CI: 1.42–1.92), while the ORs for the KOSHA CVD risk groups in the highest quartiles of SMM%, SMM/body mass index (BMI), and MFR were 0.47 (95% CI: 0.22–0.72), 0.51 (95% CI: 0.05–0.76), and 0.48 (95% CI: 0.23–0.74), respectively. Conclusions: We found that high SMI increase the likelihood of high risk of CVDs, while high SMM%, SMM/BMI, and MFR lower the likelihood of high risk of CVDs. Accurate evaluation of skeletal muscle mass can help assess the cardiovascular risk in obese male workers.
( Hyo Jin Byon ),( Ji Won Lee ),( Jong Kuk Kim ),( Jin Tae Kim ),( Young Tae Kim ),( Hee Soo Kim ),( Sang Chul Lee ),( Chong Sung Kim ) 대한마취과학회 2010 Korean Journal of Anesthesiology Vol.59 No.2
Background: The purpose of this study was to assess the safety issues concerning anesthetic management of videoassisted thoracoscopic surgery (VATS) in pediatric patients. Methods: The medical records of 52 pediatric patients undergoing VATS using general anesthesia and one-lung ventilation (OLV) were reviewed. OLV was achieved with a Fogarty catheter (n=23) or endobronchial intubation (n=7) in patients < 10 years of age (group Y, n=30), and using a double-lumen tube (n=19) or a univent (n=3) in children aged between 10 and 16 years of age (group O, n=22). Hypoxemia, hypercarbia, the difference between ETCO2 and PaCO2, and the effect of CO2 insuffl ation were assessed. Results: A decrease in SpO2 less than 90% was observed in 40% of the group Y, compared to none of the group O (P<0.05). A hypercarbia (ETCO2 > 50 mmHg) was observed more frequently in group Y (40%) than in group O (0%; P<0.05). The difference between the ETCO2 and PaCO2 was 10.4 ± 8.9 mmHg in group Y and 4.6 ± 3.9 mmHg in group O (P<0.05). Hypercarbia and acidosis occurred more frequently in patients with CO2 insuffl ation than those without insuffl ation in group Y. Conclusions: Although the anesthesia for VATS in pediatric patients was successfully accomplished, the infants and younger children presented with more intra-operative problems when compared with older children. The anesthetic management for VATS in infants and younger children requires careful and vigilant monitoring. (Korean J Anesthesiol 2010; 59: 99-103)