• Journal of Animal Science and Technology
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• 제55권2호
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• pp.81-85
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• 2013

This experiment was conducted to investigate the effects of lactation records in Holstein dairy cattle on the selection rates using a total of 341,436 test records from 113, 812 heads of cattle from first to third lactation. Heritabilities for milk, fat, and protein yields were highest at first lactation (0.28, 0.24, and 0.27, respectively), and decreased to 0.14, 0.15, and 0.13 at third lactation. For the milk yields, phenotypic correlations between first and second lactation, first and third lactation, and second and third lactation were low (0.49, 0.39, and 0.47, respectively), while genetic correlations among consecutive lactations and between second and third were above 0.8 and 0.9. In Model I, of the 1,138 heads the top 1% were selected based on first lactation records, only 32.4% (396 heads) were re-selected when the second lactation records were included and the 67.6% (769 heads) were newly selected animals. While in Model II, 85.1% (1,138 heads) of the animals which were selected as the top 1% on the basis of first and second lactation records were included. A multiple trait evaluation method using multiple lactation records is more desirable than a single trait evaluation method using first lactation records only.

• Asian-Australasian Journal of Animal Sciences
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• 제33권8호
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• pp.1217-1223
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• 2020

Objective: Eggshells with a uniform color and intensity are important for egg production because many consumers assess the quality of an egg according to the shell color. In the present study, we evaluated the influence of dominant effects on the variations in eggshell color after 32 weeks in a crossbred population. Methods: This study was conducted using 7,878 eggshell records from 2,626 hens. Heritability was estimated using a univariate animal model, which included inbreeding coefficients as a fixed effect and animal additive genetic, dominant genetic, and residuals as random effects. Genetic correlations were obtained using a bivariate animal model. The optimal diagnostic criteria identified in this study were: L^🟉 value (lightness) using a dominance model, and a^🟉 (redness), and b^🟉 (yellowness) value using an additive model. Results: The estimated heritabilities were 0.65 for shell lightness, 0.42 for redness, and 0.60 for yellowness. The dominance heritability was 0.23 for lightness. The estimated genetic correlations were 0.61 between lightness and redness, -0.84 between lightness and yellowness, and -0.39 between redness and yellowness. Conclusion: These results indicate that dominant genetic effects could help to explain the phenotypic variance in eggshell color, especially based on data from blue-shelled chickens. Considering the dominant genetic variation identified for shell color, this variation should be employed to produce blue eggs for commercial purposes using a planned mating system.

• 대한불안의학회지
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• 제2권1호
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• pp.22-27
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• 2006

Objectives : There is a paucity of data on the long-term course of obsessive-compulsive disorder (OCD) and chronological relationship between OC symptoms and their related symptoms such as anxiety and depression. The purpose of this study was to investigate the longitudinal course of OC symptoms as well as anxiety and depression which are believed to be associated with OC symptoms. Methods : Data for 155 patients with OCD who completed general evaluation for OCD were used. Forty four were excluded to minimize the effect of the different age of onset on the clinical course. One hundred eleven patients finally participated in the analysis. Cross-sectional correlations between each symptom as well as between such symptoms and the duration of illness were analyzed. Further correlation analysis was done within two groups that were divided by 7 years of the duration of illness. Results : There were significant correlations not only between the severity of OC symptoms and anxiety but also between anxiety and depressive symptom, regardless of the duration of illness. These correlations between such symptoms were also found within patients with the duration of illness below 7 years, whereas these were not within the group with the duration of illness above 8 years. Conclusion : Patients with OCD in this study shows the moderate to severe level of OC symptoms irrespective of the duration of illness. Our finding also suggests that the OC symptoms, especially obsessions are closely related to anxiety and depressive symptoms and these relationships might be pronounced in relatively early phase of the OCD after onset.

• Clinical and Experimental Pediatrics
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• 제59권4호
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• pp.183-189
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• 2016

Purpose: This study aimed to evaluate the correlation, according to postnatal age, between plasma B-type natriuretic peptide (BNP) levels and echocardiographic parameters for the assessment of patent ductus arteriosus (PDA) in preterm infants with respiratory distress. Methods: We enrolled 42 preterm infants with respiratory distress who underwent serial echocardiographic evaluation with simultaneous plasma BNP measurements until ductal closure. The correlations between BNP levels and the following 4 representative echocardiographic parameters were studied: diameter of the ductus arteriosus (DA), ratio of the left atrial diameter to the aortic diameter (LA/Ao), ratio of the PDA diameter to the infant's left pulmonary artery diameter (PDA/LPA), and the antegrade diastolic flow of LPA (DFLPA). Results: BNP levels were significantly correlated to the magnitude of the ductal shunt, comprising the DA diameter, PDA/LPA ratio, LA/Ao ratio, and antegrade DFLPA for the overall study period. The earliest significant correlation, starting from postnatal day 2, was observed between the LA/Ao ratio and BNP levels. The PDA/LPA ratio and the antegrade DFLPA showed significant correlations with BNP levels postnatal day 3 onward, and with the DA diameter, postnatal day 5 onward. Conclusion: BNP levels and echocardiographic parameters showed a positive correlation, but the significance of the correlations differed according to the postnatal age, especially during the first few days of life.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2009년 춘계학술대회논문집
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• pp.315-320
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• 2009

A computational investigation is conducted on free convection from a thin plate having a surface heat source. The thermal configuration simulates the recently-proposed transparent film heater made of a single-walled carbon nanotube film on a glass substrate. The Navier-Stokes computations are carried out to study laminar free convection from the heater. Parallel numerical experiments are performed by using a simplified design analysis model which solve the conduction equation with the boundary conditions utilizing several existing correlations for convective heat transfer coefficient. Comparison leads to the most suitable boundary condition for the thermal model to evaluate the performance evaluation of a transparent thin-film heater.

• 대한치과교정학회지
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• 제50권4호
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• pp.258-267
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• 2020

Objective: This study aimed to analyze the correlation of horizontal and sagittal planes used in two-dimensional diagnosis with lip canting by using three-dimensional (3D) analysis. Methods: Fifty-two patients (25 men, 27 women; average age: 24 years) undergoing treatment for dentofacial deformity were enrolled. Computed tomography images were acquired, and digital imaging and communication in medicine files were reconstructed into a 3D virtual model wherein horizontal and sagittal craniofacial planes were measured. Subsequently, the correlations of lip canting with these horizontal and sagittal planes were investigated. Results: The mandibular symmetry plane, the occlusal plane, Camper's plane, the mandibular plane, Broadbent's plane, and the nasal axis plane were correlated with the amount of lip canting (Pearson's correlation coefficients: 0.761, 0.648, 0.556, 0.526, 0.438, and 0.406, respectively). Planes associated with the lower part of the face showed the strongest correlations; the strength of the correlations decreased in the midfacial and cranial regions. None of the planes showed statistically significant differences between patients with clinical lip canting (> 3°) and those without prominent lip canting. Conclusions: The findings of this study suggest that lip canting is strongly correlated with the mandibular symmetry plane, which includes menton deviation. This finding may have clinical implications with regard to the treatment of patients requiring correction of lip canting. Further studies are necessary for evaluating changes in lip canting after orthognathic surgery.

• Journal of Information Processing Systems
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• 제16권3호
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• pp.612-628
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• 2020

This paper presents a new approach for detecting abnormal behaviors in complex surveillance scenes where anomalies are subtle and difficult to distinguish due to the intricate correlations among multiple objects' behaviors. Specifically, a cascaded probabilistic topic model was put forward for learning the spatial context of local behavior and the temporal context of global behavior in two different stages. In the first stage of topic modeling, unlike the existing approaches using either optical flows or complete trajectories, spatio-temporal correlations between the trajectory fragments in video clips were modeled by the latent Dirichlet allocation (LDA) topic model based on Markov random fields to obtain the spatial context of local behavior in each video clip. The local behavior topic categories were then obtained by exploiting the spectral clustering algorithm. Based on the construction of a dictionary through the process of local behavior topic clustering, the second phase of the LDA topic model learns the correlations of global behaviors and temporal context. In particular, an abnormal behavior recognition method was developed based on the learned spatio-temporal context of behaviors. The specific identification method adopts a top-down strategy and consists of two stages: anomaly recognition of video clip and anomalous behavior recognition within each video clip. Evaluation was performed using the validity of spatio-temporal context learning for local behavior topics and abnormal behavior recognition. Furthermore, the performance of the proposed approach in abnormal behavior recognition improved effectively and significantly in complex surveillance scenes.

• 한국지반공학회논문집
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• 제21권9호
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• pp.65-75
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• 2005

흙의 최대 전단탄성계수는 동적/정적 지반구조물 설계에서 중요하게 다루어야 하는 기본 토질상수이다. 본 연구에서는 서해안 송도 지역의 실트질 모래에 대해 표준관입시험, 콘관입시험, 자가굴착식 공내재하시험, 다운홀 시험, 탄성파 탐사 콘관입시험, 공진주 시험 등을 수행하여 최대 전단탄성계수를 구하고 그 결과를 통계적으로 분석하였다. 다운홀 시험을 기준으로 표준관입시험 및 콘관입시험에 대한 경험식으로 구한 최대 전단탄성계수를 비교하고 새로운 경험식물 제안하였다. 제안식으로 구한 전단탄성계수는 다운홀 시험 결과와 비교적 잘 일치하였으며, 제안식을 이용하여 적절히 지반의 최대 전단탄성계수를 평가할 수 있음을 확인하였다.

• 한국지반공학회논문집
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• 제20권7호
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• pp.25-32
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• 2004

본 논문은 소구경말뚝의 현장시험결과를 조사하고 축방향 변위와 흙의 성질과의 상관관계에 따른 말뚝의 주변마찰력을 산정하기 위하여 종합적으로 검토하였다. 점착력과 비점착력의 성질을 가진 흙에 대하여 조사를 하였다. 현장적용 목적에 부합한 소구경말뚝의 하중-변위관계와 지반공학적 흙의 특성 그리고 흙의 종류에 대한 연구가 정규화평균값과 경험관계식을 통하여 이루어졌다. 대구경말뚝과 압력-그라우팅 설치 효과로 인한 소구경말뚝의 하중전이로 인한 지지력은 현저한 차이가 있었다. 특히 말뚝 근입깊이(D)와 말뚝 직경(B)의 비가 100보다 작은 얕은 깊이에서는 소구경말뚝이 대구경말뚝에 비해 현저하게 뛰어난 지지력을 가지고 있음을 알 수 있었으며 점착력이 있는 흙에서는 약 1.5에서 최고 2.5배정도 비점착력인 흙에서는 약 1.5에서 2.5배 그리고 최고 6배의 지지력을 갖고 있음을 알 수 있다.

• 재활간호학회지
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• 제9권2호
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• pp.109-116
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• 2006

Purpose: This study is a descriptive research in which the pathological syndromes of the schizophrenic patients in the community mental health centers, the degrees of the insights, and the correlations between them were examined. Method: The subjects included 114 SPR pt. people who were enrolled in community mental health centers located in D City. The research was conducted during the period from Aug. 1st, 2002 to Jul. 30th, 2004. The instruments were PANSS developed by Kay(1987) and SUMD developed by Amador(1993). Results: Among the pathological syndromes, positives ones were $12.64{\pm}3.80$ on the average, negative ones were $32.00{\pm}5.36$, and general pathological syndromes were $30.50{\pm}6.24$. In the evaluation of the insights, the mean score was $11.81{\pm}5.09$. There were some significant correlations between positive syndromes and general pathological ones (r=.572, p=.000), and negative syndromes and general pathological ones(r=.262, p=.029), while there was no significant correlation between the insights and the sub-measures of general pathological syndromes. Conclusion: Therefore, the schizophrenic patients taking advantage of the community mental health centers have more negative syndromes than those in hospitalized, and rehabilitation programs are needed to help them continuously. And the further study of the correlations between the pathological syndromes and the degrees of the insights are required, and still, it should be analyzed what effects the insight acquirement brings about to the improvements of the pathological syndromes after the application of the insight-oriented programs.