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Evaluation of the Bite Forces in Patients with Unilateral Temporomandibular Disorders
이우정,김미은,김기석,Lee, Woo-Jung,Kim, Mee-Eun,Kim, Ki-Suk Korean Academy of Orofacial Pain and Oral Medicine 2006 Journal of Oral Medicine and Pain Vol.31 No.4
Most patients suffering from TMD appear to have unsatisfactory masticatory function and compromised values of bite force. The purposes of this study were to investigate and compare bite force between affected and unaffected sides of patients with unilateral TMD and to evaluate its relation with duration of TMD. 42 patients with unilateral TMD, from Department of Oral Medicine, Dankook University Dental Hospital, were selected for this study. The ratio of men to women was 9:33 and their mean age of $27.2{\pm}10.4$ years. The bite forces were measured over both canines (for anterior bite force) and $1^{st}$ molars (for posterior bite force) using a bite force recorder while all the subjects were asked to clench successively for 3 seconds not until pain was felt. They were compared with those measured from bilateral TMD patients(N=6, M:F=1:5, mean age: $23.0{\pm}27.3$ years). The unilateral TMD patients were divided into time groups according to duration of TMD on the basis of 1 and 6 months, respectively. Paired and unpaired t-tests were used for statistical analysis. Unilateral TMD patients in this study showed that the affected sides had significantly lower bite force than the unaffected sides(force difference of about 7-8 kgf, p<0.05) while there was no significant sides difference in the bilateral patients. Nor did bite force on the affected sides reveal significant difference between unilateral and bilateral TMD patients. With regards to TMD duration, there was significant difference between the patients with TMD < 6 months and $\geq$ 6 months (p<0.05) while no significant difference existed between < 1 month and $\geq$ 1 month. The results of this study indicated that unilateral TMD patients can exhibit more reduced bite force on the affected sides compared with that on the unaffected sides and that bite force on the unaffected sides might be deteriorated more as longer did TMD last.
음성 향상을 위한 최소값 제어 음성 존재 부정확성의 추적기법
이우정,장준혁,Lee, Woo-Jung,Chang, Joon-Hyuk 한국음향학회 2009 韓國音響學會誌 Vol.28 No.7
본 논문에서는 최소값 제어 음성 존재 부정확성의 추정기법을 이용한 음성 향상 기법을 제안한다. 기존의 음성 존재 부정확성 추정기법에서는 간단한 a posteriori SNR에 근거하여 프레임, 채널마다 다른 a priori음성 부재 확률값을 결정하여 음성 부재 확률 계산에 적용하였다. 본 논문에서 제안된 알고리즘은 기존 음성 존재 부정확성 추적방법과는 달리 최소값 제어방법을 이용하여 주파수성분별 최소값에 근거한 강인한 a priori음성 부재 확률값 추정방법을 통해 음성 부재 확률에 적용하여 음성을 향상시킨다. 제안된 음성 향상 기법은 ITU-T P.862 perceptual evaluation of speech quality (PESQ)를 이용하여 평가하였고 기존의 음성 존재 부정확성 추적방법보다 향상된 결과를 나타내었다. In this paper, we propose the minima controlled speech presence uncertainty tracking method to improve a speech enhancement. In the conventional tracking speech presence uncertainty, we propose a method for estimating distinct values of the a priori speech absence probability for different frames and channels. This estimation is inherently based on a posteriori SNR and used in estimating the speech absence probability (SAP). In this paper, we propose a novel estimation of distinct values of the a priori speech absence probability, which is based on minima controlled speech presence uncertainty tracking method, for different frames and channels. Subsequently, estimation is applied to the calculation of speech absence probability for speech enhancement. Performance of the proposed enhancement algorithm is evaluated by ITU-T P. 862 perceptual evaluation of speech quality (PESQ) under various noise environments. We show that the proposed algorithm yields better results compared to the conventional tracking speech presence uncertainty.
공간회귀모형을 이용한 대구경북 지역 단위면적당 아파트 매매가격 예측
이우정,박철용,Lee, Woo Jung,Park, Cheolyong 한국데이터정보과학회 2015 한국데이터정보과학회지 Vol.26 No.3
이 연구에서는 공간회귀모형 중 공간시차모형과 공간오차모형을 이용하여 대구 경북 지역 단위면적당 아파트 매매가격을 예측하였다. k-최근접이웃 (k-nearest neighbours)을 이용하여 공간가중행렬을 구축하였으며, 이를 이용해 2012년 3월의 단위면적당 아파트 매매가격에 대한 모형을 적합시켰다. 적합시킨 공간시차모형, 공간오차모형을 이용하여 2013년 3월의 단위면적당 아파트 매매가격을 예측하였으며 RMSE (root mean squared error), RRMSE (root relative mean squared error), MAE (mean absolute error)를 통해 두 모형의 성능을 비교하였다. In this study we predict apartment prices per unit in Daegu-Gyeongbuk areas by spatial lag and spatial error models, both of which belong to so-called spatial regression model. A spatial weight matrix is constructed by k-nearest neighbours method and then the models for the apartment prices in March, 2012 are fitted using the weight matrix. The apartment prices in March, 2013 are predicted by the fitted spatial regression models and then performances of two spatial regression models are compared by RMSE (root mean squared error), RRMSE (root relative mean squared error), MAE (mean absolute error).
이우정(Woo Jung Lee) 한국간담췌외과학회 2009 한국간담췌외과학회지 Vol.13 No.2
There is controversy regarding surgical treatment of gallbladder carcinomas. Generally, simple cholecystectomy alone (including laparoscopic cholecystectomy) is an adequate treatment for pathologic stage T1a gallbladder carcinoma. T1b tumors are associated with good long-term survival even after simple cholecystectomy, but are associated with a slightly elevated locoregional recurrence rate. Therefore, a definitive curative treatment with liver resection and lymph node dissection should be performed. According to anecdotal experiences at our institution, simple, minimally invasive, laparoscopic cholecystectomy in certain patients (T1a) is likely to provide an acceptable surgical outcome compared to radical surgery in treating gallbladder carcinoma. And as evidence for minimally invasive surgical treatment for gallbladder carcinoma with T1b and T2 gallbladder carcinomas has increased and technical improvements have occurred in laparoscopic lymph node dissection, we have extended the indication of minimally invasive laparoscopic surgery (including da Vinci Robotic surgery) to T2 gallbladder carcinoma. Even though we cannot draw firm conclusions because the sample size was small and study duration was short, preliminary results are intriguing. a) Among 15 patients with T1a gallbladder carcinomas who were treated with minimally invasive surgery, there has been no recurrence to date. b) Among 7 patients with T1b lesions, one patient had liver metastasis 2 years after surgery. c) Among 15 patients with T2 lesions, two patients had disease recurrence in the para-aortic lymph node area 1 and 5 months, respectively, after surgery (laparoscopic simple cholecystectomy). d) After doing regional lymph node dissection (sometimes aortocaval lymph nodes as well) in 2006, 2 of 10 patients (20%) had positive regional lymph nodes after surgery but no recurrence has occurred to date. For suspected T1 and T2 gallbladder carcinomas without regional and systemic metastasis, after a preoperative study (using EUS and PET) for the main lesion and metastasis, we found that we can treat them with minimally invasive laparoscopic (or da Vinci Robotic) cholecystectomy and lymph node dissection (if needed, including aortocaval para-aortic lymph nodes).