• Journal of the Korean Home Economics Association
• /
• 제42권7호
• /
• pp.103-118
• /
• 2004

The purpose of this study was to investigate the discriminative factors of on-line consumer satisfaction. Data were obtained from an online questionnaire survey with 1089 online shoppers who had the experience of either purchasing or visiting a fashion on-line shopping mall from the panel of an online survey agency(www.inr.co.kr) and 1049 responses were analyzed. For analysis of data, descriptive analysis, Cronbach's ${\alpha}$, $\chi$$^2$-test, one-wav ANOVA, Ducan test and stepwise regression analysis were applied. The results of this study were as follows: Firstly as a result of differences of purchasing experience and future purchasing intention via internet, 4 consumer groups were generated: internet patronizing group, trial and unsatisfied experience group, future purchasing intention group, and internet carelessness group. Secondly each group differences was found in demographic variables such as age, marital status, income and employment status. Croup differences were also found in personal, product, and store variables except tangibility. According to consumer groups, different factors were directly impact on consumer satisfaction.

• Korean Journal of Radiology
• /
• 제25권2호
• /
• pp.189-198
• /
• 2024

Objective: To investigate the prognostic utility of radiomics features extracted from ¹⁸F-fluorodeoxyglucose (FDG) PET/CT combined with clinical factors and metabolic parameters in predicting progression-free survival (PFS) and overall survival (OS) in individuals diagnosed with extranodal nasal-type NK/T cell lymphoma (ENKTCL). Materials and Methods: A total of 126 adults with ENKTCL who underwent ¹⁸F-FDG PET/CT examination before treatment were retrospectively included and randomly divided into training (n = 88) and validation cohorts (n = 38) at a ratio of 7:3. Least absolute shrinkage and selection operation Cox regression analysis was used to select the best radiomics features and calculate each patient's radiomics scores (RadPFS and RadOS). Kaplan-Meier curve and Log-rank test were used to compare survival between patient groups risk-stratified by the radiomics scores. Various models to predict PFS and OS were constructed, including clinical, metabolic, clinical + metabolic, and clinical + metabolic + radiomics models. The discriminative ability of each model was evaluated using Harrell's C index. The performance of each model in predicting PFS and OS for 1-, 3-, and 5-years was evaluated using the time-dependent receiver operating characteristic (ROC) curve. Results: Kaplan-Meier curve analysis demonstrated that the radiomics scores effectively identified high- and low-risk patients (all P < 0.05). Multivariable Cox analysis showed that the Ann Arbor stage, maximum standardized uptake value (SUVmax), and RadPFS were independent risk factors associated with PFS. Further, β2-microglobulin, Eastern Cooperative Oncology Group performance status score, SUVmax, and RadOS were independent risk factors for OS. The clinical + metabolic + radiomics model exhibited the greatest discriminative ability for both PFS (Harrell's C-index: 0.805 in the validation cohort) and OS (Harrell's C-index: 0.833 in the validation cohort). The time-dependent ROC analysis indicated that the clinical + metabolic + radiomics model had the best predictive performance. Conclusion: The PET/CT-based clinical + metabolic + radiomics model can enhance prognostication among patients with ENKTCL and may be a non-invasive and efficient risk stratification tool for clinical practice.

• IEIE Transactions on Smart Processing and Computing
• /
• 제6권3호
• /
• pp.193-199
• /
• 2017

Instead of using only spatial features from a single frame for person re-identification, a combination of spatial and temporal factors boosts the performance of the system. A recurrent neural network (RNN) shows its effectiveness in generating highly discriminative sequence-level human representations. In this work, we implement RNN, three Long Short Term Memory (LSTM) network variants, and Gated Recurrent Unit (GRU) on Caffe deep learning framework, and we then conduct experiments to compare performance in terms of size and accuracy for person re-identification. We propose using GRU for the optimized choice as the experimental results show that the GRU achieves the highest accuracy despite having fewer parameters than the others.

• Journal of Information Technology Applications and Management
• /
• 제17권3호
• /
• pp.99-119
• /
• 2010

The Radio Frequency IDentification (RFID), once used widely, is expected to provide improved convenience in our everyday life. Crude observations of RFID consumption show that there is a wide variation in the adoption of this technology across different individuals. One plausible explanation is that consumers with challenging mind who seek for new technologies and have a good grasp of the new RFID technology should have higher propensity to use the technology. A better understanding of such acceptance pattern of RFID is of high importance in establishing technology providers' marketing strategies. This study is aimed to explain differences in the level of RFID acceptance focusing on cognitive styles of potential RFID users. By presenting potential RFID users' discriminative propensity toward RFID technology, this study hopes to provide guidelines for the design of service strategies that facilitate consumers' acceptance of RFID.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권6호
• /
• pp.2689-2692
• /
• 2014

Purpose: To investigate the risk factors for appendiceal metastasis of epithelial ovarian cancer and compare findings with the previous studies. Materials and Methods: One hundred and thirty-four patients with epithelial ovarian cancer were assessed in this study. All of them had undergone a surgical procedure including appendectomy. Of these, 21 (15.7%) patients who had appendiceal metastasis were analyzed as the case group and the patients with no metastasis were the controls, compared according to stage, grade, histology of tumor, preoperative Ca125 levels, presence of ascites, peritoneal cytology, diameter and site of tumor considered as risk factors. Results: We found statistically significant differences between the groups in terms of stage, grade, right-sided tumor location, presence of ascites, diameter of tumor${\geq}10cm$ and positive peritoneal cytology (p<0.05). In the logistic regression model, stage, grade, presence of ascites, right-sided location and diameter of tumor were independent risk factors. ROC curve analysis showed that stage, grade and diameter of the tumor were discriminative factors for appendiceal metastasis. Conclusions: In epithelial ovarian cancer, stage, grade, presence of ascites, right-sided location and large tumor size have importance for estimation of risk of appendiceal metastasis. As we compare our findings with previous studies, there is no definite recommendation for the risk factors of appendiceal metastasis in epithelial ovarian cancer and more studies are needed.

• Journal of Korea Multimedia Society
• /
• 제20권5호
• /
• pp.748-757
• /
• 2017

In order to recognize the facial expressions, good features that can express the facial expressions are essential. It is also essential to find the characteristic areas where facial expressions appear discriminatively. In this study, we propose a directional LBP feature for facial expression recognition and a method of finding directional LBP operation and feature region for facial expression classification. The proposed directional LBP features to characterize facial fine micro-patterns are defined by LBP operation factors (direction and size of operation mask) and feature regions through AdaBoost learning. The facial expression classifier is implemented as a SVM classifier based on learned discriminant region and directional LBP operation factors. In order to verify the validity of the proposed method, facial expression recognition performance was measured in terms of accuracy, sensitivity, and specificity. Experimental results show that the proposed directional LBP and its learning method are useful for facial expression recognition.

• Journal of Korean Academy of Nursing
• /
• 제52권1호
• /
• pp.80-91
• /
• 2022

Purpose: This study developed an instrument to evaluate the health empowerment of North Korean women refugees and examined its validity and reliability. Methods: Through literature review and focused group interviews, 66 preliminary items with three constructs, including perceived control, perceived competence, and goal internalization were selected based on Menon's psychological health empowerment model. A questionnaire survey was conducted with 239 North Korean women refugees in the community from August 31 to September 4, 2020. Content, construct, convergent, and discriminative validity were evaluated. Cronbach's α was used to evaluate the reliability of scale. Results: The final instrument consisted of 31 items with three factors that were identified through confirmatory factor analysis. The convergent validity showed that the correlation coefficient was .52 (p < .001), which confirmed the validity of the developed measurement tool. Cronbach's α for all the items was .94, and Cronbach's α for the factors was .76~.91. Conclusion: This health empowerment scale has been developed to include aspects of health empowerment, provide a conceptual framework, and offer objective indicators to evaluate the effectiveness of a health education program.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
• /
• 제9권1호
• /
• pp.34-46
• /
• 1998

This study was designed to develop the scale of paternal parenting attitudes which has become an area of interest in child fostering study recently. Considering various factors extracted from previous Korean and foreign studies, the authors constructed a questionnaire composed of total 57 questions. It was applied to 126 mothers from families with no psychiatric patient in Seoul and Pusan who had at least onechild older than age 12 by random sampling. Then the authors extracted the factors which were able to compose the scale and evaluated the concurrent reliability. Also the authors selected mothers of 47 schizophrenic patients and 29 bipolar I patients diagnosed with the criteria of DSM-IV who have treated in Seoul National Mental Hospital and 46 controls which consisted of randomly selected mothers from normal families for the discriminative validity test. The results were as follows. The authors extracted 5 subscales of active participation, democratic guidance, warmth, hostility, devotion for education and Cronbach’s ${\alpha}$ value of each subscale which shows its internal consistency was .82, .78, .65, .78, .61 respectively. In the discriminative validity test, all subscales except ‘devotion for education’ subscale significantly discriminated between fathers of schizophrenics and control group. Furthermore ‘active participation’ subscale and ‘warmth’ subscale showed significant difference between fathers of control group and resting both father group of schizophrenics and biopolar I patients.

• Journal of Korea Entertainment Industry Association
• /
• 제14권2호
• /
• pp.1-14
• /
• 2020

This study was initiated by the interest in identifying what the characteristics of BTS' preference is in the expanded K-Pop market. For this study, a survey was conducted to Taiwan, Thailand, Vietnam, and Korea where BTS is popular. The results of this study show that Vietnam and Thailand have the most positive perceptions of most of the BTS preferences, and the factors affecting the highest quality were analyzed by the differentiating sense of BTS. BTS' preference is an independent variable consisting of five factors: singers and music, a discriminative sense, global communication, meditative lyrics and Korean sentiment. And it has been shown to have a statistically significant influence on both the fandom star and the fan community at a high level. In particular, the Identification desire for fandom star shows that the discriminative sense and meditative lyrics affect the positive at a high level. Also, the identification desire for the fan community's found that the attraction of singers and music affects the highest level of affection. This study was extended to Southeast Asian and Korean fans through a wide range of survey participants, and it is meaningful that a new perspective on the BTS preference was available. Nonetheless, Failure to take into account the various variables that may affect the fandom effect and the intent to purchase, and the lack of a survey of fans in the U.S. and Europe, which has more fans worldwide, could be a limitation of the study.

• Hwankyungkyoyuk
• /
• 제15권2호
• /
• pp.86-99
• /
• 2002

The purpose of this study is to make clear the management of Environmental Education in Elementary school in Korea. To accomplish this purpose, The research for the actual condition of management of Environmental Education according to school, grade, and class was progressed. The researcher was analyzed Hindrance Factors of Sound Environmental Education in School and presented some suggestion on the basis of above-mentioned findings. On one side, the method of research is a case study on qualitative based way. A case study was conducted with it's focus on public elementary school in Seoul. As for major research methods, observation by participating in school field and in-depth interview were respectively employed; subsidiary methods included literature study. The findings of this study are as belows: First, Environmental Education was not managed practically with specific way in school. Second, Environmental Education by direct and actual outdoor experience was unusual. Third, most of class school work about Environmental Education was focused on not only the type of prescription after the environmental problem but also, the treatment of articles in newspaper and TV. Forth, educational compulsion such as “you have to do that.” was mainly used as Environmental guidance for sound attitude in school without clear reasons. In the last analysis, hindrance factors of sound management for environmental education in elementary schools were ‘passive adjustment’, ‘discriminative reception’, ‘absence of information resource’. these factors came from atmosphere of negligence environmental education in schools. Therefore, all of teachers have to affirmative belief and attitude as personal dimension and all of elementary schools improve environmental education system.