• Clinical and Experimental Reproductive Medicine
• /
• 제50권3호
• /
• pp.200-205
• /
• 2023

Objective: Polycystic ovary (PCO), a diagnostic component of polycystic ovary syndrome (PCOS), requires either an ovarian volume (OV) criterion or a follicle number per ovary (FNPO) criterion. This study investigated the association of OV and FNPO criteria with various manifestations of PCOS. Methods: This cross-sectional study was conducted at a university hospital among 100 patients newly diagnosed with PCOS (according to the revised Rotterdam criteria). Fasting blood samples were collected to measure glucose, total testosterone (TT), luteinizing hormone (LH), follicle-stimulating hormone (FSH), lipid, insulin, and hemoglobin A1c levels. An oral glucose tolerance test was performed. Transabdominal or transvaginal ultrasound of the ovaries was done, depending on patients' marital status. All investigations were conducted in the follicular phase of the menstrual cycle. OV >10 mL and/or FNPO ≥12 indicated PCO. A homeostasis model assessment of insulin resistance (IR) value ≥2.6 indicated IR, and metabolic syndrome (MS) was defined according to the international harmonization criteria. Results: Seventy-six participants fulfilled the OV criterion, 70 fulfilled the FNPO criterion, and 89 overall had PCO. Both maximum OV and mean OV had a significant correlation with TT levels (r=0.239, p=0.017 and r=0.280, p=0.005, respectively) and the LH/FSH ratio (r=0.212, p=0.034 and r=0.200, p=0.047, respectively). Mean OV also had a significant correlation with fasting insulin levels (r=0.210, p=0.036). Multivariate binary logistic regression analysis showed that IR (odds ratio [OR], 9.429; 95% confidence interval [CI], 1.701 to 52.271; p=0.010) and MS (OR, 7.952; 95% CI, 1.821 to 34.731; p=0.006) had significant predictive associations with OV alone, even after adjustment for age and body mass index. Conclusion: OV may be more closely related to the androgenic and metabolic characteristics of PCOS than FNPO.

• Journal of Periodontal and Implant Science
• /
• 제53권2호
• /
• pp.135-144
• /
• 2023

Purpose: The aim of this study was to investigate the risk of periodontitis according to current smoking status based on the number of cigarettes smoked per day (CPD) and the Fagerström Test for Nicotine Dependence (FTND). Methods: All enrolled patients were diagnosed and classified according to the new periodontal classification scheme, and current smoking status was investigated via a self-reported questionnaire. The correlation between smoking status (CPD and FTND) and periodontitis risk (severity of periodontitis and tooth loss due to periodontal reasons) was statistically assessed using Spearman correlation coefficients. Moreover, partial correlation analyses between smoking and periodontal status were performed after adjusting for age, sex, and diabetes mellitus. Results: Overall, data from 74 men and 16 women (mean age: 48.1±10.8 years) were evaluated. The mean number of missing teeth, CPD, and FTND score were 3.5±5.2, 24.6±15.5, and 3.5±2, respectively. CPD and the FTND were significantly positively correlated with each other (r=0.741, P<0.001). CPD and the FTND were also significantly correlated with the severity of periodontitis (CPD: r=0.457, P<0.05 and FTND: r=0.326, P<0.05) and the number of missing teeth due to periodontal reasons (CPD: r=0.525, P<0.05 and FTND: r=0.480, P<0.05), respectively. Conclusions: Within the limitations of this study, both CPD and the FTND were significantly correlated with the severity of periodontitis and the number of periodontally compromised extracted teeth.

• 지능정보연구
• /
• 제18권3호
• /
• pp.79-96
• /
• 2012

기술의 발전과 융합이 빠르게 이루어지고 있는 오늘날 유망기술을 어떻게 파악하여, 다양한 후보군들 중에서 최적의 R&D 대상을 어떻게 선정할 것인가에 대한 문제는 주요한 경영의사결정문제 중 하나로 부상하고 있다. 본 연구에서는 이러한 R&D 기술 선정 의사결정을 지원할 수 있는 새로운 지능형 의사결정지원시스템을 제안한다. 본 연구의 의사결정지원시스템은 크게 3가지 모듈로 구성되는데, 우선 첫 번째 모듈인 '기술가치 평가' 모듈에서는 기업이 관심을 갖고 있는 분야의 특허들을 분석하여 유망기술 파악에 요구되는 다양한 차원의 기술가치 평가지수 값들을 산출하는 작업이 이루어진다. 이를 통해, 현재 시점에서의 각 기술의 가치가 다양한 차원에서 평가가 이루어지고 나면, 두 번째 모듈인 '미래기술가치 예측' 모듈에서 이들의 시간 흐름에 따른 변화를 학습한 인공지능 모형을 토대로 각 후보기술들이 미래 시점에 어떤 가치지수값을 갖게 될 것인지 예측값을 산출하게 된다. 마지막 세 번째 모듈인 '최적 R&D 대상기술 선정 지원' 모듈에서는 앞서 두 번째 모듈에서 산출된 각 차원별 예상 가치지수값들을 적절히 가중합하여 기술의 종합적인 미래가치 예측값을 산출하여 의사결정자에게 제공하는 기능을 수행한다. 이를 통해 의사결정자가 자사에 적합한 최적의 R&D 대상기술을 선정할 수 있도록 하였다. 본 연구에서는 제안된 시스템의 적용 가능성을 검증하기 위해, 10년치 특허데이터에 인공신경망 기법을 적용하여 실제 기술가치 예측모형을 구축해 보고, 그 효과를 살펴본다.

• 한국경영과학회지
• /
• 제11권1호
• /
• pp.44-50
• /
• 1986

In this paper, we find optimal policy for the (Q, r) inventory model under the lead time uncertainty. The (Q, r) inventory model is such that the fixed order quantity Q is placed whenever the level of on hand stock reaches the reorder point r. We first develop the single level inventory model as the basis for the analysis multi-level distribution systems. The functional problem is to determine when and how much to order in order to minimize the expected total cost per unit time, which includes the set up, inventory holding and inventory shortage cost. The model, then, is extended to the multi-level distribution system consisting of the factory, warehouses and retailers. In this case, we also find an optimal policy which minimizes the total cost of the contralized multi-level distribution system.

• 천문학회보
• /
• 제38권1호
• /
• pp.57.1-57.1
• /
• 2013

Non-LTE 항성대기모형인 Tlusty 모형의 합성색지수와 성간소광을 매우 적게 받은 산개성단에 있는 별들의 색지수를 바탕으로 O와 B형 별의 고유색지수 관계를 채택하였다. 태양인근 3kpc 내에 있는 약 190개 젊은 산개성단의 가시광 및 근적외선 2MASS JHKs 관측자료와 위에서 채택한 고유 색지수 관계를 적용하여 색 초과비 E(V-I)/E(B-V), E(V-J)/E(B-V), E(V-H)/E(B-V), 및 E(V-Ks)/E(B-V)를 얻고, 색 초과비와 $R_V$의 관계를 사용하여, 각 성단의 성간소광법칙 $R_V$를 결정하였다. 국부 나선팔의 백조자리 방향과 Per 나선팔에 있는 산개성단들은 약간 작은 $R_V$를 보이며, 큰개자리 방향의 국부 나선팔에 있는 산개성단은 정상적인$R_V$를, 그리고 Sgr-Car 나선팔에 있는 산개성단들은 약간 큰 값을 보였다. 이 결과는 최대 편광도를 보이는 파장과 $R_V$의 관계로 얻을 수 있는 양상과 잘 일치한다.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
• /
• pp.46-49
• /
• 2002

Recent trends of low-temperature polycrystalline Si (LTPS) TFT technologies are presented. Characteristics of LTPS TFT processes are compared with those of a-Si TFT's. In order to compete with well-established a-Si TFT-LCD technology, LTPS process has to be as simple as possible. One of the most critical processes, recrystallization of a-Si thin films, could be the process for the differentiation of LTPS technology. Along with these technical reviews, a recent development of the 5.0-inch LTPS TFT-LCD is presented. In order to achieve high-performance display characteristics and save the power consumption, the transflective mode is adopted. The 5.0-inch display with 186 pixel-per-inch, high-resolution LCD was measured to be 10% for the reflectance and 70:1 for the contrast ratio. This display is designed for a high information content hand-held PC (HHPC) application.

• 농약과학회지
• /
• 제19권2호
• /
• pp.113-118
• /
• 2015

고추 흰가루병이 수량에 미치는 영향을 조사하여 경제적 방제수준을 설정하고자 시험을 수행하였다. 고추 흰가루병의 발병 정도에 따른 수량의 변화에 대한 분석은 병발생을 10단계 수준으로 구분하여 시험을 실시하였다. 흰가루병 발생수준과 과장, 과경, 과중은 부의 상관관계를 형성하였으며, 발생이 증가함에 따라 수량이 감소하여 유의한 부의 상관관계가 형성되었다. 시설고추 흰가루병 발생 정도와 수량과의 회귀식은 천하통일과 부촌품종이 각각 Y = -2.136X+327.9 $R^2=0.76$, Y = -3.44X+291.1 $R^2=0.73$ 성립되었으며, 시설고추 흰가루병 발생 정도와 수량 손실량과의 회귀식은 천하통일과 부촌품종이 각각 Y = 2.14X+15.45 $R^2=0.76$ $r=0.87^{**}$ Y = 3.44X+11.21 $R^2=0.73$ $r=0.85^{**}$ 성립되었다. 따라서 시설 고추 수량에 영향을 주지 않는 수준의 흰가루병 방제 적기는 발생 병반면적률이 3.2~7.3% 이하 이었으며. 고추 흰가루병 경제적 방제수준은 시설 고추 흰가루병 발생 정도가 3.8~6.2% 이하 일 때 방제를 시작하면 방제횟수를 절감 하면서 효율적인 방제를 할 수 있다.

• 한국연초학회지
• /
• 제4권2호
• /
• pp.37-39
• /
• 1982

This experiment was conducted to obtained basical source for gathering seeds in flue- cured (NC 2326), and to investigate some characters on the relation to gathering number of capsules per a plant; amount of gathering seeds, weight per 1000 seeds and germination rate, respectively. As a results; correlation coefficient of number of capsules and amount of gathering seeds was pros(live correlation (r =0.9771**) , Weight per 1000 seeds (0.16g) was good from 39$\pm$2 capsules and amount of gathering seeds was 4.8g. So it is considered that method of gathering seeds wise proved to be a desirable 39: 2 capsules and amount of gathering seeds was 4- 5 gram.

• Asian-Australasian Journal of Animal Sciences
• /
• 제8권3호
• /
• pp.301-305
• /
• 1995

The study was conducted at village level in Pabna milkshed areas of Bangladesh to asses the existing feed and fodder sources of cattle. The results showed that the overall number of cattle per farm family was 7.17 and chicken represents highest number (15.57) per farm family in this area. The results also indicated that during monsoon season the bathan is planted with Vigna mungo and Lathyrus sativus and average grazing hours per day varied from 1.1 in October to 5.6 in February. In Summer, they were offered naturally grown Cynodon dactylon with supplementary feeding of rice straw. The study further showed that the highest (65.7%) feed scarcity was found during mid April to mid May followed by mid June. The cultivation of Vigna mungo was highest (76.71%) compared to Lathyrus sativus by the farmers in the bathan areas. The major constraint to cattle production is the scarcity of quality feed during mid October to mid November.

• Smart Structures and Systems
• /
• 제14권3호
• /
• pp.367-376
• /
• 2014

Ambient vibration techniques are nowadays a very popular tool to assess dynamic properties of buildings. Due to its non destructive character, this method is particularly valuable, especially for health monitoring of historical monuments. The present ambient vibration experiment consists on the evaluation of vibration modes of a Medieval tower. Situated in Soncino (close to Cremona, in the Northern Italian region named Lombardia), the tower of 41.5 meters height has been monitored by seismometers located at different points inside the structure. Spectral ratios of the recorded ambient vibrations clearly identify a fundamental mode at about 1 Hz, with a slight difference in the two horizontal components. A second mode is also evidenced at approx 4-5 Hz, with a moderate degree of uncertainty. The records of a ML 4.4 earthquake, occurred during the monitoring period, confirm the information obtained by microtremor analysis. Daily variations of both 1st and 2nd mode were detected: these variations, of an amount up to 2%, seem to be well related with the temperature.