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.

한국의 울릉도 특산 식물 섬백리향에 대하여

이연희 이화여자대학교 자연과학대학 1975 梨花 自然 Vol.6 No.-

The suther studied the texanmic characteristics for Korean endemic species, Thymus magnus which grow in Ullung Island. Particularly the characteristics, floristics, epidermis, glands, and vascular bundles of stem have been studied. The all characters and chromosomes are very alike to Thymus quinquecostatus but the characters of Thymus magnus are larger. It, presumed the both taxa originated from common ancestor and then the taxa grew at different ecological and geographical areas, one which grew at mainland of Korea and the others at isolated Island Ullungdo.

Bela Bartokdml 敎育的作品《Mikrokosmos》에 關한 2聲 對位法의 考察

李姸熙 서울敎育大學校 1986 論文集 Vol.19 No.-

Bela Bartoks "Mikrokosmos" nimmt innerhalb seines Klavierschafens einen so bedeutenden Platz ein, daβvon ihm aus ein wesntlicher Zugang zum Baartokschen Gesamtwerk gewonnen werden kann. In gleiche Weise fuhrt ein instruktiver Weg von den auffallend zahlreichen durchgehend zweistimmigen Stucken zu dem Gesamtgefuge dieses groβartigen Lehrwerdes. Von den 153 Stucken des Mikrokosmos sind 30 im zweistimmigen Kontrapunkt gehalten. Es Sind dies die Nummern 22 bis 37, 39, 46, 57 bis 59, 78, 81, 91, 101, 114, 119, 121 und 123. Die Grenzen dieser Auswahl lieβen sich enger wie auch weiter fassen. Sie sind umso weniger eindeutig, als der Begriff des Kontrap[unktes eine von der ublichen abweichende definiktion finden wird. Abschlieβen eine kurze Zusammenfassung : Wir beschrankten uns auf die Zweistimmigkeit, um von der Einfachheit ihrer Stimmbeziehungen aus die "kontrapunktische" Satzweise Bartoks zu erhellen als entscheidende Charakteristika waren festzustellen: 1. die Skalendopplung als tonale Vorform der Bitonalitat, methodisch an die Funf-Finger-Ubungen angepaβt; 2. der melodische Grundzug, der das tonale, rhythmische. "harmonische" und formale Geschenhen weitgehend bestimmt; 3. die rhythmische Variation in der imitatorischen Stimmbindung als ausdruck der "absoluten Melodik"; 4. die konstruktive Bedeutung bestimmter Intervalle (Terz, Quart) als formgliederndes Elementl; 5. die mikrokosmische Ordnung in dem oft versteckten Sinnbezug der Skalen und Skalenausschnitte; 6. das Skalenverstandnis in steigender wie fallender Bewegungsrichtung und die Dreiteiligkeit als vorherrschendes formales Prinzip.

流行先導力에 따른 消費者 分類와 關聯變因 硏究

이연희,윤영애,강윤정 진주여자전문대학 1992 論文集 Vol.15 No.-

The purposes of the study were to classify the fashion leadership of the adult women to compare the characteristics among five segments of the popuiation (innovative communiator, innovator, opinion leader, followers, indifferents) which were divided according to their fashion opinion leadershiop and innovativeness. Data were obtained from 524 adult women living in Gyeongnam area using a seif-administered questionnaire. The results of the study were as follows : there were sighificant differance among groups in most of fashion-related varsibles(fashion involvement, marketer-dominated and neutral information sourece, life style) and demographic variables. The study is to analyze the characteristics of each group accoding to fashion leadership, and to predict the consummer behavior to the brand-new merchandise, and to predict the proper devices of the Marketers.

이압요법이 혈액투석 환자의 불면증에 미치는 효과

이연희,김숙영,Lee, Youn-Hee,Kim, Sook-Young 한국재활간호학회 2007 재활간호학회지 Vol.10 No.1

Purpose: This study was to examine the effects of auricular acupressure therapy on insomnia of hemodialysis patients. Method: The subjects were recruited at a hemodialysis room in B General hospital in Kyonggi-Do. Thirty one patients who have suffered from insomnia were conveniently assigned to an experimental group(n=16) and a control group(n=15). The experimental group received a 2-week intervention composed of a series of six auricular acupressure therapy every 2~3 days. The effect of intervention was measured by completion of a 15-item sleep scale and a sleep satisfaction scale. Result: The sleep score was higher in the experimental group than in the control group(p=.000). The sleep satisfaction score was higher in the experimental group than in the control group(p=.000). Conclusion: The auricular acupressure therapy can improve the sleep and sleep satisfaction scores in hemodialysis patients with insomnia. Auricular acupressure therapy can be used at the clinical settings as a safe and effective independent nursing intervention to decrease insomnia in hemodialysis patients.

용해성 전도성 폴리피롤/고분자전해질 복합체의 특성변화

이연희,이준영,이두성 한국고분자학회 1999 한국고분자학회 학술대회 연구논문 초록집 Vol.24 No.2

양배추 protoclone의 변이

이연희,조현석,김호일,나종현,이인원 한국식물생명공학회 1997 식물생명공학회지 Vol.24 No.3

양배추 F$_1$ 종자 그린 챌린저 배축으로부터 분리된 원형질체로부터 재분화된 protoclone들에 대한 형태적 특성, 배수성, 동위효소, RAPD 분석으로 변이 양상을 살펴보았다. 형태적 특성은 초자, 엽형, 엽색, 엽결각, savoy, wave등을 조사한 결과 대부분이 형태적으로 원식물체와 같았으나 3개체는 잎의 결각이 뚜렷하고 1개체는 savoy와 wave가 심하게 나타났다. Flow cytometry system으로 종자에서 정상적으로 발아한 배축, 자엽과 잎의 배수성을 측정한 결과 배측과 자엽에서는 2배체와 4배체 세포가 혼합되어 있었으나 잎에서는 일정하게 정상적인 2배체로 측정되었다. 잎을 재료로 하여 125개체 protoclone들의 배수성을 본 결과 2배체 91개체(72.8%), 4배체 32개체(25.6%), 혼합배수체 2개체(1.6%)로 나타났다. 또한 4배체를 나타내는 R$_{0}$ protoclone 개체를 자가수분시켜 얻은 종자를 발아시켜 배축, 자엽과 잎의 배수성을 측정한 결과 잎에서 4배체, 배축과 자엽에서는 4배체, 8배체 세포가 혼합되어 있었다. PGM과 MDH 동위효소 분석 결과 R$_{0}$ 정상개체 그리고 변이를 나타낸 개체, 배수성이 다른 개체들간의 밴드양상은 같았으며 15종류의 random primer를 사용한 RAPD에서도 차이는 없었다.없었다. Plants were regenerated from hypocotyl protoplast culture of cabbage (F$_1$hybrid Green Challenger) and were transplanted on fields. The ploidy level of regenerated and seed-grown plants was measured by flow cytometry. In total 125 regenerated plant, diploid (2n), tetraploid(4n), and mixoploid (2n+4n) were 72.8%, 25.6%, and 1.6%, respectively. Most of the regenerated plants had normal phenotype, whereas several plane showed abnormal phenotype such as heavy leaf incision, savoy, and wave. The regenerated plants with abnormal phenotype and different ploidy level were analysed by isozyme and RAPD, but no significant difference was found.

고분자 Dopant를 이용한 용해성 polypyrrole의 합성

이연희,이준영,이두성 한국고분자학회 1999 한국고분자학회 학술대회 연구논문 초록집 Vol.24 No.1

요로 결석의 체외 충격파 쇄석술 : 단순 복부 사진을 이용한 성공률 예측의 효율성 Efficacy of the KUB in Predicting the Success Rate

이연희,김유미 단국대학교 1998 論文集 Vol.33 No.-

Background: To evaluate the efficacy of KUB according to size, location, shape of urinary stones in ESWL. Methods: In 149patients with urinary stones, we retrospectively reviewed KUB findings of stone size, location, shape and analyzed success rate of ESWL. Results: The overall success rate of ESWL in 149 cases was 89.9%. And the sucess rates of renal and ureter stones were 81.4% & 93.4% respectively. It was more successfully treated by ESWL when stone showed size below 2㎝, round shape and ureteropelvic junction(UVJ) location. Conclusions: The KUB is a useful imaging modality in evaluating the efficacy of ESWL of urinary stone.

성인 여드름 지식정도 및 실태 조사 연구

이연희,최미혜 중앙대학교 간호과학연구소 2001 중앙간호논문집 Vol.5 No.2

The main purpose of this study is to inform the importance of the treatment of the acne in adults and to propose the basic data in order to establish the direction of the proper strain care to our whole society. The degree of the knowledge about the acne in 390 adult was average 80.8 points, and in each sex, the females have the higher points rather than the males in the knowledge about the acne. Among the subject people of the research, 113 people who currently have the acne showed average 81.3 points in the degree of the knowledge about the acne, and in each sex, the females have the more knowledge about the acne rather than the males. However, 80% of both the total subject people of the research and the adults who currently have the acne misunderstood that the impurity of the face results in the acne and the greasy flood more aggravates the acne. In the research of the actual condition of the acne, 33.6% of the total repliers currently had the acne, and it was examined that in each sex, the males was 32.7% and the females was 34.2%. The parts where the acne was generated were mostly in the forehead, and the second was the cheek, and the third was the chin. Additionally, it was investigated that 40.8% of the males and 1.2% of the females had the grade 1 acne, and the acne scar was found in 69.4% of the males and 73.2% of the females. The case that the adult atone was repeatedly recovered and aggravated periodically was found in 63.3% of the males and 70.7% of the females. Both the males and the females found their own respective way to treat the acne, or 80.3% of the males and 57.3% of the females did not care and treat the acne 83.7% of the males and 86.6% of the females extracted their acne for themselves. As for the was to extract the acne, 85.7% of the males and 74.4% of the females extracted the acne with their own hands while they are performing the facial cleansing, and it was examined that the acne scar was found in 61.2% of the males and 56.1% of the females. There was no difference of the actual condition of the acne according to the sex, however about the factor which aggravates the acne, the females and the males showed the meaningful difference in the recognition such as the season, the flood, the costiveness, the skin care cosmetics, and the color cosmetics. Additionally, there was meaningful difference among the actual condition according to the acne treatment, the condition of the acne according to the soap which is used in the facial cleansing, the condition after extracting the acne. As seen in above the result, the atone could be found in a lot of adults, and the adults misunderstood the knowledge of the acne, moreover they did not treat the acne in the proper way.