• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권3호
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• pp.1390-1403
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• 2016

Facial expression recognition (FER) plays a very significant role in computer vision, pattern recognition, and image processing applications such as human computer interaction as it provides sufficient information about emotions of people. For video-based facial expression recognition, depth cameras can be better candidates over RGB cameras as a person's face cannot be easily recognized from distance-based depth videos hence depth cameras also resolve some privacy issues that can arise using RGB faces. A good FER system is very much reliant on the extraction of robust features as well as recognition engine. In this work, an efficient novel approach is proposed to recognize some facial expressions from time-sequential depth videos. First of all, efficient Local Binary Pattern (LBP) features are obtained from the time-sequential depth faces that are further classified by Generalized Discriminant Analysis (GDA) to make the features more robust and finally, the LBP-GDA features are fed into Hidden Markov Models (HMMs) to train and recognize different facial expressions successfully. The depth information-based proposed facial expression recognition approach is compared to the conventional approaches such as Principal Component Analysis (PCA), Independent Component Analysis (ICA), and Linear Discriminant Analysis (LDA) where the proposed one outperforms others by obtaining better recognition rates.

• Structural Engineering and Mechanics
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• 제31권2호
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• pp.225-235
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• 2009

The present paper reviews the shear design (of reinforced concrete beam) provisions of four different national codes and proposes a new but simplified shear strength empirical expression, incorporating variables such as compressive strength of concrete, percentage of longitudinal and vertical steel/s, depth of beam in terms of shear span-to-depth ratio, for reinforced concrete (RC) beams without shear reinforcement. The expression is based on the experimental investigation on RC beams without shear reinforcement. Further, the comparisons of shear design provisions of four National codes viz.: (i) IS 456-2000, (iii) BS 8110-1997, (iv) ACI 318-2002 (v) EuroCode-2-2002 and the proposed expression for the prediction of shear capacity of normal beam/s, have been made by solving a numerical example. The results of the numerical example worked out suggest that there is need for revision in the shear design procedure of different codes. Also, the proposed expression is less conservative among the IS, BS & Eurocode.

• 반도체디스플레이기술학회지
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• 제16권1호
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• pp.86-90
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• 2017

Today's young generation users are very active in expressing themselves through smart phones, form networks in this cyber space and express their identities freely. Therefore, this study aims to investigate how young people in their 20s are expressing themselves through smart phones and the differences from the attempt of self-expression in the existing cyber space. The research method was an in-depth interview, which was a qualitative research method, aimed at people in their 20s, so that they could freely talk about their thoughts and feelings. In-depth interviews are useful for users' psychological and in-depth analysis of behavior.

• Computers and Concrete
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• 제26권6호
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• pp.497-504
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• 2020

Concrete can lose its alkalinity by concrete carbonation causing steel corrosion. Thus, the determination of the carbonation depth is necessary. An empirical model is proposed in this research to predict the carbonation depth of concrete using Gene expression programming (GEP). The GEP model was trained and validated using a large and reliable database collected from the literature. The model was developed using the six parameters that predominantly control the carbonation depth of concrete including carbon dioxide CO2 concentration, relative humidity, water-to-cement ratio, maximum aggregate size, aggregate to binder ratio and carbonation period. The model was statistically evaluated and then compared to the Jiang et al. model. A parametric study was finally performed to check the proposed GEP model's sensitivity to the selected input parameters.

• 디지털콘텐츠학회 논문지
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• 제9권2호
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• pp.187-192
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• 2008

본 연구는 차원 높은 영상콘텐츠 제작 과정 중 깊이감의 표현을 위해 적용될 수 있는 기술들과, 그 기술들의 구체적인 내용 및 이에 대한 검증에 관한 것이다. 깊이감을 표현하는 기술에는 조명을 이용하는 방법, 피사계심도 자체를 이용하는 방법과 렌즈를 이용하는 방법, 그리고 카메라의 움직임 즉 줌과 돌리를 이용하는 방법 등이 있다. 이와 같은 방법들이 실제로 적용될 수 있는지 확인하기 위해 선호 빈도를 조사해 본 결과, 기술이 적용된 사진들이 대부분 선택되었다. 깊이감을 표현하는 방법 가운데 렌즈를 이용하는 방법이 가장 편의성 높은 방법이라는 점을 확인할 수 있었다.

• Asian Pacific Journal of Cancer Prevention
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• 제17권1호
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• pp.189-195
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• 2016

Oral tongue squamous cell carcinoma (OTSCC) is the most common oral cancer subtype with a maximum propensity for regional spread. Our objective was to study if p53 expression might have any correlation with aggressive patterns of invasion within oral tongue cancers as well as with the histologically identified degree of oral tongue dysplasia. p53 immunoexpression was studied using immunohistochemistry in early staged OTSCCs (n=155), oral tongue dysplasias, (n=29) and oral tongue normal specimens (n=10) and evaluated for correlations with histological and clinicopathological parameters. Our study (n=194) showed a pattern of p53 expression increasing with different grades of tongue dysplasia to different grades of invasive OTSCC (p=0.000). Among the OTSCC tumours, positive p53 expression was seen in 43.2% (67/155) and a higher p53 labelling index was significantly associated with increased Bryne's grade of the tumour invasive front (p=0.039) and increased tumour depth (p=0.018). Among the OTSCC patients with tobacco habits, (n=91), a higher p53 labelling index was significantly associated with increased risk of local recurrence (p=0.025) and with lymphovascular space involvement (p=0.014). Evaluation of p53 through varying degrees of dysplasia to oral tongue cancer indicates that p53 expression is linked to aggressive features of oral tongue cancers and tongue precancers entailing a closer monitoring in positive cases. Among the OTSCCs, p53 expression is associated with tumour aggressiveness correlating with increased grading of invasive tumour front and tumour depth.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2002년도 봄 학술발표회 논문집
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• pp.72-73
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• 2002

• Asian Pacific Journal of Cancer Prevention
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• 제14권3호
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• pp.1995-1998
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• 2013

Objective: To study the expression of the mismatch repair proteins hMSH2 and nm23 in sporadic colorectal cancer, determine any inter-relationship, and further investigate any clinical significance. Methods: Expression of hMSH2 and nm23 proteins was assessed in 87 colorectal cancer tissues by SP immunohistochemistry, with analysis of survival using follow-up data. Results: In the sporadic colorectal cancer tissues, nm23 protein expression appeared independent of the histological type (P>0.05), but correlated with the invasion depth and lymphatic metastasis (P<0.05). In contrast, hMSH2 protein expression was not significantly correlated with these clinicopathologic features (P>0.05), although it positively correlated with that of nm23 protein in the sporadic colorectal cancers (rs=0.635, P<0.05). Combined expression of the two was found to be related with invasion depth, lymphatic metastasis and prognosis of sporadic colorectal cancer (P<0.05). Conclusion: nm23 protein level was related with the degree of malignancy, and could be used as an index to predict the invasion and metastasis potential. The expression of hMSH2 protein is positively correlated that of nm23 protein, and the combined expression of the two has certain guiding significance for the prognosis of sporadic colorectal cancer.

• 한국임상보건과학회지
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• 제8권2호
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• pp.1436-1443
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• 2020

Purpose: The purpose of this study was to differences in the expression rate of Porphyromonas gingivalis according to smoking status, smoking amount and period of smoking. Methods: At the time of investigation, 30 smokers and non-smokers were recruited among patients with periodontitis with a probing pocket depth(PPD) of 4 mm or more. General information was collected using a self-questionnaire, and the average value was used by a dentist to measure the probing pocket depth of three times each for the first or second molar. Plaque collection and analysis were performed by collecting only subgingival plaque using a conventional method, and the expression rate of P. gingivalis was confirmed using polymerase chain reaction (PCR). For statistical analysis, the SPSS Ver 25.0 program was used. Results: Smoking did not have a significant effect on the expression of P. gingivalis, but it did affect the expression of more type II genotypes (p<0.05). In addition, smokers had more slight periodontal pocket, and the amount and duration of smoking did not affect the expression of P. gingivalis. Conclusions: In the future, it is necessary to reinforce the group of smokers and non-smokers with healthy oral conditions, and to investigate the quantitative difference in the expression rate and genotype of P. gingivalis over time of harmful substances in smoking.

• 기본간호학회지
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• 제15권2호
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• pp.229-239
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• 2008

Purpose: A phenomenology study was conducted to provide in-depth data to help in the understanding of young women who have become unmarried mothers. Method: In-depth interviews were done with 11 unmarried mothers from August 2002 to September 2003 Data were recorded and analyzed by Colaizzi method. Result: Significant statements consisted of 5 categories with 12 theme clusters accompanying each category. The categories were: "Sex as a tool" which included living and connections, "Sex as an expression of her desire" which included wanting and expression of love, "Sex to be dominated" which included significance, domination and negative aspects of sex, "Moral sex" which included secrecy, responsibility and connections with life, "Sex as a sense of identity" which included expression of gender and association with peer group. Conclusion: The results of this study will help indicate directions for care of unmarried mother, which should be based on a deep understanding of their personal perception of sexuality. Also, it can be utilized as basic materials for development of sex educational programs to prevent repeat pregnancies in unmarried women and information on consultion with unmarried mothers.