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Periventricular Heterotopia 1례 : 증례보고 A Case Report
이태남,박용석,이규춘,정찬,목진호 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.9
A nomalies of cell migration are due to various kinds of damage(vascu1ar. infectious. teratogenic etc.) which interfere with neuronal migration between the 8th and 24th week of gestation. Periventricular heterotopias are nodular masses which protrude into the ventricular lumen. There is a high frequency of convulsive disorders. A 38-year-old woman presented to a intermittent headache, seizure-like activity and postictal subjective weakness on the left side. The computerized tomography findings and physical and neurologic examinations with an EEG revealed no specific abnormal findings. The MRI showed tumor-like nodular mass lesions at right periventricular area. The histological study of stereotactic excised biopsy demonstrated a composition of neuron and glia. After operation, headaches were slightly reduced and there was no reattack of seizure activity. Authors reports one case of periventricular heterotopia with a review of the literature.
이태남 ( Tea-nam Lee ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2
본 프로젝트는 시간, 날씨, 미세먼지 농도, 캘린더, 뉴스 등을 포함한 기본적인 생활정보를 스마트 미러에 디스플레이 해주며 추가적으로 구글 어시스턴트를 활용해 음성인식으로 유튜브 재생, 인터넷 검색 등 다양한 기능을 내재하고 있다. 아울러 인체 감지 센서를 이용해 움직임이 감지되지 않으면 절전모드로 동작하다 움직임이 감지하면 일반 모드로 동작한다. 마지막으로 CCTV 기능을 내재하고 있어 CCTV 화면을 웹 애플리케이션을 통해 실시간 스트리밍 하며 사람 얼굴이 감지될 시화면을 녹화하는 기능을 포함하고 있다.
칡한우에 대한 일반인과 축산농민의 인지도 및 소비 행태 조사
이태남 ( Taenam Lee ),주나미 ( Nami Joo ) 대한영양사협회 2016 대한영양사협회 학술지 Vol.22 No.4
This study was conducted to determine recognition of Chikhanwoo, promote its market competitiveness, and vitalize its uses in Korea. This research was carried out on 465 people, including 264 of the general public and 191 livestock farmers. For awareness of Chikhanwoo, 53.6% of the general public and 86.9% of livestock farmers recognized Chikhanwoo (P<0.001) through TV, Internet, news, magazines, and others. For consumption behaviors of Chikhanwoo meat, 4.3% of the general public and 1.9% of livestock farmers have purchased Chikhanwoo meat in the past. Most of them hinted at their intention to repurchase and highly intimated their wish to purchase on whether Chikhanwoo tastes better, is more nutritious and is safer than Hanwoo. In addition, they thought country of origin and price were the most important factors for purchasing (P<0.001). For recognition of the Hanwoo grading system, they preferred 1++ and 1+, significantly (P<0.001). For need for quality certification, most respondents thought that the government should introduce a quality certification system for Chikhanwoo. For importance factor of prevalence of Chikhanwoo meat, marketability value had the highest degree of importance, followed by taste, quality, tradition and cooking methods (P< 0.001). Results of this study show that domestic consumption of Chikhanwoo can be boosted by supplying Chikhanwoo meat with a differentiated taste and a safety assurance to the general public. There is also need to enhance genetic resources and improve brand value of Chikhanwoo. Continuous research and efforts should be made for the development of the livestock market.
차일남,이태연 서울産業大學校 1993 논문집 Vol.38 No.1
A computer simulation is performed on the effectiveness of the active minimization of harmonically excited enclosed sound fields for producing global reduction in the amplitude of the pressure fluctuations. In this study for the appreciable reductions in total time averaged acoustic potential energy, ???, the transfer location strategies for three dimensional active noise control is presented based on the approximation in the total time averaged acoustic potential energy. In this study, the above theoretical basis is used to investigate the application of active control to sound fields of low modal density. By the use of room-like 3-dimensional rectangular enclosure it is demonstrated that the reductions in ???, can be achieved by using a single secondary source, provided that the source is placed within the half a wavelengths from the primary source and placed away from nodal line of the sound field. Concerning the reduction in ??? by minimizing the pressure in sound fields by the use of 3-dimensional rectangular enclosure, the effects of the number of sensors and the locations of these sensors are investigated. When a few models dominate the response it is found that if only a limited number of sensors are located away from nodal line and located at the pressure maxima of the sound field such as at each corner of a rectangular enclosure.
덕트계 음장 모델링에 의한 능동 소음 제어에 관한 연구
차일남,이태연 서울産業大學校 1992 논문집 Vol.35 No.1
In many years, active noise control in a long duct have mainly been studied. Active noise control in long duct system deal with plane wave propagation at low frequency using adaptive filtering techniques. In most of these studies, the acoustic properties such as reflections and resonances inside the acoustic system have rarely been studied. In this paper, the modeling method of active noise control system using a fixed FIR filter for short-length rectangular duct was proposed. The acceptable attenuation on the real acoustic system and stability of the controller are predicted in this computational simulation.
자동차 실내 능동 소음제어를 위한 다채널 적응 알고리즘에 관한 연구
차일남,이태연 서울産業大學校 1993 논문집 Vol.37 No.1
Active control of acoustic noise is an application area of adaptive digital signal processing with increasingly interest along the last year. This work studied the implementation of the multichannel LMS filter and the application of this algorithm for the reduction of the noise inside a vechicle cabin using a number of 'secondary sources' drived by adaptive filtering of a reference noise source. Firstly, we propose the use of adaptive method for the time-varient optimal convergence factor. Secondly, we propose the use of adaptive delayed inverse model to estimate the elastic-acoustic transfer function presented in vechicle cabin. The original, primary source is often periodic, with a known fundamental frequency. A suitably filtered reference signal can thus be used to drive the secondary sources. An algorithm is presented for adapting the coefficients of an FIR filter feeding such a secondary source in such a way as to minimize the output of a suitably placed microphone. In this algorithm, the coefficients of adaptive filter driving an array of secondary sources can be adapted to minimize the sum of the squares of the outputs of a number of error microphones. The multichannel LMS algorithm displays that such an algorithm is considered suitable to used for the global suppression of noise in vechice cabin.