• Information Systems Review
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• v.26 no.2
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• pp.59-81
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• 2024

Online consumer reviews provide a variety of information from the customer perspective in terms of satisfaction and dissatisfaction. Negative emotional expression is a potential antecedent of review usefulness, and can also influence potential consumers' attitudes and decisions. In addition, because national culture provides a perspective from which individuals view the world and act, it is highly likely that differences in negative emotional expression will occur depending on culture. This study explores the relationship between national culture and negative emotional expression based on impression management theory and ultimately analyzes the impact on review usefulness. For empirical analysis, 16,076 reviews of 140 hotels located in Seoul were collected and analyzed using the PLS-SEM method. As a result of the analysis, it was found that power distance and masculinity culture dimensions had a positive effect on reviewers' negative emotional expressions, while uncertainty avoidance and long-term orientation had a negative effect. In addition, negative emotional expression was analyzed to have a positive effect on review usefulness even when review ratings were controlled.

• Journal of Information Processing Systems
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• v.3 no.1
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• pp.38-42
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• 2007

Microarray data includes tens of thousands of gene expressions simultaneously, so it can be effectively used in identifying the phenotypes of diseases. However, the retrieval of functional information from a large corpus of gene expression data is still a time-consuming task. In this paper, we propose an efficient method for identifying functional categories of differentially expressed genes from a micro-array experiment by using Gene Ontology (GO). Our method is as follows: (1) The expression data set is first filtered to include only genes with mean expression values that differ by at least 3-fold between the two groups. (2) The genes are then ranked based on the t-statistics. The 100 most highly ranked genes are selected as informative genes. (3) The t-value of each informative gene is imposed as a score on the associated GO terms. High-scoring GO terms are then listed with their associated genes and represent the functional category information of the micro-array experiment. A system called HMDA (Hallym Micro-array Data analysis) is implemented on publicly available micro-array data sets and validated. Our results were also compared with the original analysis.

• Reproductive and Developmental Biology
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• v.33 no.4
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• pp.249-255
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• 2009

The miniature pig is considered to be a better organ donor breed for xenotransplantation than other pig breeds because the size of the organs of the miniature pig is similar to that of humans. In this study, we aimed at identifying differentially expressed genes in the miniature pig ovary during pregnancy. For this, we used the miniature pig ovary model, annealing control primer-based reverse transcription polymerase chain reaction (PCR), quantitative real-time PCR (qRT-PCR), and northern blotting analysis. We identified 13 genes showing differential expression on the based of pregnancy status and validated 8 genes using qRT-PCR. We also sequenced the full-length cDNA of ephrin receptor A4 (EphA4), which had a significant difference in expression level, and validated it by northern blotting. These genes may provide a better understanding of the cellular and molecular mechanisms during pregnancy in miniature pig ovary.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.12
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• pp.6000-6017
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• 2018

This paper presents a new descriptor, named Histograms of Prominent Edge Directions (HPED), for the recognition of facial expressions in a person-independent environment. In this paper, we raise the issue of sampling error in generating the code-histogram from spatial regions of the face image, as observed in the existing descriptors. HPED describes facial appearance changes based on the statistical distribution of the top two prominent edge directions (i.e., primary and secondary direction) captured over small spatial regions of the face. Compared to existing descriptors, HPED uses a smaller number of code-bins to describe the spatial regions, which helps avoid sampling error despite having fewer samples while preserving the valuable spatial information. In contrast to the existing Histogram of Oriented Gradients (HOG) that uses the histogram of the primary edge direction (i.e., gradient orientation) only, we additionally consider the histogram of the secondary edge direction, which provides more meaningful shape information related to the local texture. Experiments on popular facial expression datasets demonstrate the superior performance of the proposed HPED against existing descriptors in a person-independent environment.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.31 no.6
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• pp.15-18
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• 2013

• Proceedings of the Korean Society for Language and Information Conference
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• 1996.02a
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• pp.277-288
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• 1996

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.18 no.8
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• pp.17-22
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• 2000

• Journal of the Korea Computer Industry Society
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• v.8 no.3
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• pp.187-196
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• 2007

Human being represents his emotion through facial expression on purpose or unconsciously. Several psychologists started the research for analysis of facial expression, and over the last decade, many computer scientists were also interested in it. Facial expression recognition is a future-valuable research that can be applicable in many kinds of field based on man-computer interface. However, in spite of lots of study, it is hard to find any practical systems because of a variety of illumination and scale of face, and high dimensional information to be processed. In this paper, I tried to describe a generic framework for facial expression analysis, the need of each level, and international research tendency. Also, I analyzed the case study of facial expression in Korea. I expect it to be helpful for the scientists willing to make contribution on facial expression.

• The Journal of the Korea Contents Association
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• v.6 no.8
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• pp.165-174
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• 2006

Birdwhistell explains in the whole communication, language conveys only 35% of the meaning and the rest 65% is conveyed by non-linguistic media. Humans do not entirely depend on linguistic communication, but are sensitive being, using every sense of theirs. Human communication, by using facial expression, gesture as well as language, is able to convey more concrete meaning. Especially, facial expression is a many-sided message system, which delivers Individual Personality, interest, information about response and emotional status, and can be said as powerful communication tool. Though being able to be changed according to various expressive techniques and degree and quality of expression, the symbolic sign of facial expression is characterized by generalized qualify. Animation characters, as roles in story, have vitality by emotional expression of which mental world and psychological status can reveal and read naturally on their actions or facial expressions.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.1
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• pp.165-171
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• 2013

The aim of the present study was to analyze the expression of FHIT and WWOX in nasopharyngeal carcinoma (NPC) and correlations with clinical pathologic features. mRNA expression of the FHIT and WWOX was assessed by real-time fluorescent relatively quantitative PCR in 61 NPC tissues and 45 non-cancerous nasopharyngeal tissues. As a result, mRNA expression levels of both FHIT and WWOX were significantly lower in NPC patients than in control samples (P=0.049 and 0.045, respectively). Moreover, the mRNA expression of both had an inverse relation with larger invasive range (P=0.035 and 0.048, respectively), poor histologic differentiation (P=0.012 and 0.016) and advanced clinical stage (P=0.026 and 0.038). Consistency was found between expression of FHIT and WWOX in the same NPC tissues (r=0.681, P=0.00). In conclusion, synergy between FHIT and WWOX may exist in the development of NPC so that the two factors may be considered as important genetic markers. Detecting the expression of FHIT and WWOX should provide clinically significant information relevatn to tumor diagnosis, progression and treatment modalities for NPC.