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New Approaches to Xerostomia with Salivary Flow Rate Based on Machine Learning Algorithm
이연희,이연희,어규식,박희경 대한치의학회 2023 Journal of korean dental science Vol.16 No.1
Purpose: We aimed to investigate the objective cutoff values of unstimulated flow rates (UFR) and stimulated salivary flow rates (SFR) in patients with xerostomia and to present an optimal machine learning model with a classification and regression tree (CART) for all ages. Materials and Methods: A total of 829 patients with oral diseases were enrolled (591 females; mean age, 59.29±16.40 years; 8~95 years old), 199 patients with xerostomia and 630 patients without xerostomia. Salivary and clinical characteristics were collected and analyzed. Result: Patients with xerostomia had significantly lower levels of UFR (0.29±0.22 vs. 0.41±0.24 ml/min) and SFR (1.12±0.55 vs. 1.39±0.94 ml/min) (P<0.001), respectively, compared to those with non-xerostomia. The presence of xerostomia had a significantly negative correlation with UFR (r=–0.603, P=0.002) and SFR (r=–0.301, P=0.017). In the diagnosis of xerostomia based on the CART algorithm, the presence of stomatitis, candidiasis, halitosis, psychiatric disorder, and hyperlipidemia were significant predictors for xerostomia, and the cutoff ranges for xerostomia for UFR and SFR were 0.03~0.18 ml/min and 0.85~1.6 ml/min, respectively. Conclusion: Xerostomia was correlated with decreases in UFR and SFR, and their cutoff values varied depending on the patient’s underlying oral and systemic conditions.
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이연희 서원대학교 학생생활연구소 1998 학생생활연구 Vol.16 No.-
The purpose of this survey is to know about job consciousness of seowon university students. There took park in 584 students with survey participant. A survey content largely contains four parts - career decision making, job choice, university life satisfaction, job center and student guidance center. The results were as follows : 1. 80.5% of students think about career, 67.1% desire job after graduation, 34.9% has cognizance of arranging term for a course in junior. 2. The majority of student hopes teacher, bureaucracy as job. They consider firstly both language and major. They meditate peaceful and harmonious relations among persons. 3. Comparatively they put life into their school but their satisfaction rate is average. 4. Positively job center and student guidance center must know their role to student because of their low acknowledge. In conclusion the results show that student guidance center emphasizes as necessary for students to enforce psychological test, counseling, survey with job, etc.
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경질 초음파를 이용한 급성 충수염의 진단 : 2례 보고 2 Case Report
이연희 단국대학교 2000 論文集 Vol.35 No.-
Acute appendicitis is the most common acute abdominal codition requiring surgery. The combination of symptoms, signs and laboratory values may, however, be equivocal in approximately one-third of patients with acute appendicitis. Transvaginal ultrasonography(US) is a noninvasive, readily available imaging technique that has greatly enhanced diagnostic sensitivity and accuracy for both gynecologic and nongynecologic diseases comparing to conventional transabdominal US. In women of childbearing age, the similarity of symptoms in gynecologic and gastroimtestinal tract diseases in particular underscores the potential utility of transvaginal US. Therefore the auther reports the cases which show the value of transvaginal US in the diagnosis of appendicitis in a pelvic appendix.
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李姸熙 서울 敎育大學校 1981 論文集 Vol.14 No.-
Improvisation is the art of performing music spontaneously, withouth the aid of manuscript, sketches, or memory. Also, in a more restricted sense, the art of introducing improvised details into witten compositions. The former is a phenomenon so evanescent thatit defies documentation and detailed detailed description. This is a branch of the musical art that was for centuries considered to be of the highest importance yet has now dwindled to insignificance amongst serious musicians. This is true, at least, of the great days of improvisation, when masters such as Bach, Handel, Mozart, and Beethoven were as famous for their improvising as for their written compositions. Today, the tape recorder could readily make a permanent record of such performances. However, the great art of improvisation has been lost, since it is no longer practiced by composers and survives chiefly among organ virtuosos. Many prople have never reflected on the intolerable loss of time in notatint musical thoughts. A passage that in performance is to to through like a flash may take ten or fifteen minutes. to notate, indeed, there is no Largo so slow that to play it takes as much time as to notate it. Hence, in composing, the musician has to be in two formance and that which laboriously undertakes to record its details, and it is possible that this conflict of speeds is an embarrassment to many composers, reducing their effectiveness by a percentage at any rate, in the more emotional types of composition. It is doubtless for this reason that some composers have formed the habit of working out all minute details in their minds before setting them on paper, and it is quite possible that some of the greatest composers, when expressing themselves in immediate sound, have done so in a different way from that of the lamp and the study. In conclusion, it many be recalled that there is one educational system today which requires the development of the improvising faculty in all its teachers, the Dalcroze syrtem, and that, in the United States, at all events, the attempt has been made to teach composition through improvisation-on the analogy of our learning first to speak our own language freely and afterwards to write it.
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中國 神話의 정치화 - 중국의 반고‧반호 신화를 중심으로
이연희 한국비교문학회 2012 비교문학 Vol.0 No.58
It is nearly impossible to systemize the characteristics of Chinese Minor Ethnic Groups' Myths due to their vast quantity and variety of the contents. In the course of a few Chinese mythologists establishing the conceptual boundaries of Chinese myths, they make the mistake of systemizing minor ethnic groups' myths as a branch of Chinese myths. In this study, the records of minor ethnic groups' myths and the Han race myths pivoting on Pangu(盤古) Myth and Panhu(盤瓠) Myth are compared and analyzed for a thorough discussion of how the minor ethnic groups' myths were integrated and absorbed in the Han race(漢族) myths. First, for the Pangu(盤古) Myth, the issue of its origination that has caused quite a debate so far was contemplated upon after dividing the issue into a Central district origination theory and a Southern district origination theory. Panhu(盤瓠) Myth, which is always mentioned in relation to the Pangu(盤古) Myth, was also looked into in two aspects. First the contents of the Panhu Myth recorded in the Yao race and 『後漢書HouHanshu ․ 南夷列傳NanYiLieChuan』were compared and analyzed to see what kind of changes Panhu(盤瓠) Myth went through according to the changes of its historical, political background. Furthermore, this study also focused on the point that only after acknowledging the fact that the Chinese civilization was formed by various races and this diversity is the principle of its existence will allow establishment of a new mythology based on such characteristics and therefore overcome the innate limitations of Chinese myths.
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