대기 중 입자상 물질의 건식침적속도 모수화에 관한 연구

김은연,오성남,방소영,이명주 한국기상학회 2003 대기 Vol.13 No.3

Characteristics of Nasal Resonance and Perceptual Rating in Prelingual Hearing Impaired Adults

김은연,윤미선,김향희,남정모,박은숙,홍성화 대한이비인후과학회 2012 Clinical and Experimental Otorhinolaryngology Vol.5 No.1

Objectives. Resonance problems in hearing impaired (HI) individuals have been described as aspects of nasality. However,there are limitations in being able to explain the range of resonance problems. Therefore, this study suggests a perceptual rating that will effectively explain the characteristics of resonance problems in HI individuals. Methods. Nasalance scores were obtained from 32 subjects in each of HI and normal hearing (NH) groups using a nasometer. The subjects were categorized into groups based on normal and abnormal nasalance ranges. The abnormal nasalance range group was further divided into hyper-, hypo-, and mixed-nasal groups. Nasalance scores were based the individuals performance in a series of passage and syllable tasks. The perceptual rating was evaluated using a newly introduced tool, ‘vertical focus of resonance’ (VFR), which focuses on the resonance energy in the frontal, throat,pharyngeal and nasal locations. Results. The NH group demonstrated a significantly lower nasalance score in the oral coupling and passage tasks than the HI group. Based on the results of nasalance correlation analysis, the HI group showed highly significant correlations between syllable and passage tasks, as contrasted with the NH group. There were significant differences in VFR between the nasalance types in both the NH and the HI groups. Conclusion. The HI hyper-nasal group showed tendencies of velopharyngeal opening, as opposed to the HI hypo-nasal group which showed tendencies of velopharyngeal closure. The HI mixed-nasal group showed inappropriate coordination of velopharyngeal function. In the HI group, the results of VFR showed that the air flow and the resonance energy were not released from the cavity of resonance. The suggested VFR tool explains the focusing characteristics of resonance energy within a continuation of speech sound regardless of the phonetic environment. Therefore, VFR may be a useful tool in explaining the deviant resonance patterns of HI individuals.

두피에 발생한 거대 피지샘 상피종 1례

김은연,김선구,김유진,이세일,Kim, Eun Yeon,Kim, Sun Goo,Kim, Yu Jin,Lee, Se Il 대한두개안면성형외과학회 2012 Archives of Craniofacial Surgery Vol.13 No.1

Purpose: Sebaceous epithelioma (sebaceoma) is a benign tumor with sebaceous differentiation. It presents primarily as a yellowish papule or nodule on the face and scalp. It must be differentiated from basal cell carcinoma and other appendageal tumors. We report a giant sebaceous epithelioma on the scalp and describe the immunohistochemical character of the cells in sebaceous epithelioma to epithelial membrane antigen (EMA). Methods: A 55-year-old-man who presented with 5-cm-diameter 2-cm-height, round shape exophytic ulcerated tumor on his head presented for treatment. The patient had noticed the lesion 40 years prior as a small yellowish plaque and 18 months ago, the plaque started to grow progressively larger. We excised the lesion with 1 cm resection margin, considering the possibility of malignancy because this lesion grossly resembled basal cell carcinoma (BCC). The defect was repaired with the use of a splitthickness skin graft. Results: When we excised the lesion, the margin was clear. Histology showed nodules that consisted of an admixture of basaloid cells and mature adipocytes lacking an organized lobular architecture. Strong expression of EMA on mature adipose cells confirmed the differential diagnosis from BCC with sebaceous differentiation because of the absence of a nuclear palisade pattern and cleft-like spaces on the hematoxylin and eosin (H&E) section. Conclusion: We treated the giant sebaceous epithelioma on the scalp with surgical excision and a split-thickness skin graft. It is important to know that the diagnosis of sebaceous epithelioma should be made based on the histologic pattern of the H&E section. Immunohistochemistry with EMA can help to confirm the differential diagnosis between sebaceous epithelioma and BCC.

계산 지능을 이용한 수리적 이론 게임 분석

김은연 한국정보과학회 2013 정보과학회지 Vol.31 No.7

서울시의 대기질 및 대기 오염감시 시스템 현황

김은연 한국방재학회 2006 한국방재학회지 Vol.6 No.3

RTO(Regenerative Thermal Oxidizer)를 이용한 VOC 제거 기술

김은연 한국공업화학회 2007 한국공업화학회 연구논문 초록집 Vol.2007 No.1

AC서보 모터의 원호보간 오차개선을 위한 슬라이딩모드 제어기 설계

김은연,이상문,곽군평,김민찬,박승규,고봉진,Kim Eun-youn,Lee Sing-mun,Kwak Gun-pyong,Kim Min-chan,Park Seung-Kyu,Ko Bong-jin 한국정보통신학회 2004 한국정보통신학회논문지 Vol.8 No.8

본 논문은 가변 구조 제어 시스템을 이용하여 AC Servo 모터의 원호 보간 오차를 개선하는데 목적을 두고 있다. AC Servo 모터를 사용하는 공작 기계의 동작에서 오차는 서보 드라이버의 시간 지연, 마찰, 그리고 모터의 x축 y축의 이득값이 어울리지 않는 등의 여러 요소가 있을 것이다. 본 논문에서는 슬라이딩 모드제어 시스템은 AC Servo 드라이브의 수치적 예로 응용되었다. 실험 결과 값은 전형적인 PI 제어와 비교하여 시스템의 원호 보간 오차 개선에 관한 우수성을 보여주고 있다. The objective of this study is aimed at reducing the contour error of AC Servo derives by improving the interpolation error of each axis through variable structure control system. The errors in machining process by AC Servo motor are due to many elements, such as the delay of the servo drivers, friction and the gain mismatch between x axis and y axis motors and so on. Sliding mode control system is applied to a AC servo drive as a numerical example in this paper. The experiment results which are compared with those of typical PI scheme show the validity of improvement in circular interpolation error of the system.

슬라이딩 모드 제어를 이용한 AC서보모터의 원호보간 오차개선에 관한 연구

김은연,이상문,김수진,곽군평 國立 昌原大學校 產業技術硏究院 2004 産技硏論文集 Vol.18 No.-

The objective of this study is aimed at reducing the contour error of AC Servo derives by improving the interpolation error of each axis through sliding mode control system. The errors in machining process by AC Servo motor are due to many elements, such as the delay of the servo drivers, friction and the gain mismatch between x axis and y axis motors and so on. Sliding mode control system is applied to a AC servo drive as a numerical example in this paper. The experiment results which are compared with those of typical PI scheme show the validity of improvement in circular interpolation error of the system.

인공와우이식 난청인의 말소리 운율변화에 따른 구어 이해와 음도 변별, 선율윤곽 확인 간 관련성

김은연,문일준,조양선,정원호,홍성화 한국음악치료교육학회 2017 인간행동과 음악연구 Vol.14 No.2

The relationships between the ability to understand changes in meaning depending on the prosody of spoken words and the ability to perceive pitch and melodic contour in cochlear implants (CI) recipients were examined. Fifteen postlingual CI recipients were measured in terms of speech prosody perception, speech perception, pitch discrimination (PD), and melody contour identification (MCI). The speech prosody perception test consists of words with positive (PW) and neutral meaning (NW). Participants were asked to identify the meaning of words depending on the conditions of positive and negative prosody. The MCI consists of subtests 1 and 2 with different chance levels to choose. Then, the relationships between speech prosody perception, speech perception, PD, and MCI performance were analyzed. There was a significant difference in identifying the meaning of words expressed in a different prosody between the PW and NW conditions. Speech prosody perception showed a significant correlation with MCI 1 while there was no significant relationship with speech perception. Although speech perception may be possible after CI, limited spoken word comprehension due to decreased sensitivity for prosodic changes may persist in CI recipients. In addition, there was a limitation in perception of melodic contour change compared to pitch discrimination, which is related to speech prosody perception. 본 연구에서는 인공와우이식 난청인(N=15)을 대상으로 말소리 운율변화에 따른 구어 이해와 음도 변별, 선율윤곽 확인(Melodic contour identification: MCI) 간 관련성을 살펴보았다. 말소리 운율 변화에 따른 구어이해를 살펴보기 위해 말소리 운율지각 검사를 시행하였고, 긍정적인 운율과 부정적인 운율 조건에 따른 의미 변화를 피검자에게 판단하게 하였다. 검사 시 긍정적인 의미(Positive meaning: PW)와 중립적인 의미(Neutral meaning: NW)를 갖는 낱말 및 낱말 조합 형태를 제시하고, 긍정적인 운율과 부정적인 운율 조건에 따른 의미 변화를 피검자에게 판단하게 하였다. 음도 변별 검사를 위해서는 단음도 변화 변별 과제와 3개 음으로 구성된 패턴에서의 음도 변별 과제가 실시되었다. MCI 검사는 기대 확률을 달리한 세부 검사 1, 2로 구성하여 시행하였다. 실시한 검사 간 관련성을 살펴본 결과, 말소리 운율지각 검사 결과는 보청기 착용으로도 청지각적 이득을 기대할 수 없었던 기간과 유의한 관련성을 보였다. PW와 NW 검사에서 운율 조건에 따라 유의한 수행 차를 보였지만, 단어조합 형태에 따른 통계적 유의성은 발견하지 못하였다. 말소리 운율지각 검사 결과는 MCI 1과 유의한 상관을 보인 반면(p<.01), 말지각 검사 수행력과는 유의한 관련성을 보이지 않았다. 이는 인공와우이식 후 시각적 단서 없이 말소리, 음소 지각이 가능해졌다 하더라도 미묘한 운율 변화에 따른 의미 지각의 제한은 계속될 수 있음을 시사한다. 또한 인공와우이식 후 선율윤곽 변화 확인은 음도 변별에 비해 제한을 보이며, 운율지각과 관련 있음을 확인할 수 있었다.

PF5)전구 대기화학수송모형에서 입자상 물질의 입자 크기별 건식 침적 속도 모수화 연구

김은연,오성남,방소영,이명주 한국대기환경학회 2003 한국대기환경학회 학술대회논문집 Vol.- No.-