• Journal of Korea Multimedia Society
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• v.12 no.2
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• pp.165-177
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• 2009

Embedded database systems (EDBMS) based on NAND flash memories are widely adopted for logging data on sensor nodes. Since write and erase operations of a flash memory are time consuming compared to read operations and wear memory cells, it is important to reduce these operations to enhance the EDBMS performance and to extend the memory life. In this paper, we propose a delayed write scheme to archive this goal. Proposed scheme stores updated parts of database pages into delayed write records to reduce the database page writes. By doing that, it decreases write and erase operations on a flash memory. Therefore, the proposed scheme enhances the logging performance of a write-intensive EDBMS on a sensor node and extends the flash memory life.

• Journal of Korea Multimedia Society
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• v.22 no.11
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• pp.1269-1279
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• 2019

In medical image analysis, segmentation is considered as a vital process since it partitions an image into coherent parts and extracts interesting objects from the image. In this paper, we consider automatic segmentations of OCT retinal images to find six layer boundaries using convolutional neural networks. Segmenting retinal images by layer boundaries is very important in diagnosing and predicting progress of eye diseases including diabetic retinopathy, glaucoma, and AMD (age-related macular degeneration). We applied well-known CNN architecture for general image segmentation, called Segnet, U-net, and CNN-S into this problem. We also proposed a shortest path-based algorithm for finding the layer boundaries from the outputs of Segnet and U-net. We analysed their performance on public OCT image data set. The experimental results show that the Segnet combined with the proposed shortest path-based boundary finding algorithm outperforms other two networks.

• Journal of Korea Multimedia Society
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• v.15 no.11
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• pp.1358-1368
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• 2012

A tag sequence estimation scheme is to estimate the physical sequence of passive RFID tags that are linearly spread using the movement of a RFID reader. Since RFID readers communicate with the passive tags by very weak radio waves, scanning passive tags are unstable. In this paper, we applied round-trip scanning of a reader to enhance the tag sequence estimation. Proposed scheme first determines the turning point of the reader movement, and then estimates the sequence of the tags using the tag sets scanned in each read cycles. Test experiments show that the proposed scheme can improve the estimation accuracy.

• Korean Journal of Child Studies
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• v.29 no.3
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• pp.319-338
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• 2008

This study aimed to develop the components of Korean creativity and to examine differences between responses of Korean and US students. Seven experts were interviewed to establish components of Korean creativity. College students in Korea (1,210) and college students in the US (514) responded to the questionnaire. Analysis was by principal component analysis, independent sample t-test, and qualitative analysis. Results were: (1) five factors of Korean creativity consisted of elaboration, redirection, novelty, understanding-the-new-by-exploring-the-old (UE), and freethinking. (2) Korean students scored higher on elaboration and UE, and American students were better at redirection, novelty, and freethinking. (3) Each of the seven interviewees identified five factors of Korean creativity, but the factors varied according to their fields of expertise.

• Korean Journal of Adult Nursing
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• v.22 no.3
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• pp.342-351
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• 2010

Purpose: The purpose of this study was to determine an increase in the number of younger and middle-aged people who have a stroke and the differences in their recovery experience compared with older people. Methods: The research question for this study was "What is the recovery experience of young adults and middle-aged people who suffer a stroke?". In order to answer the question, the grounded theory method was utilized. The data was collected through individual in-depth interviews of six participants, their age ranged from 36 to 45 years old. Results: After comparative analysis, the core category was "standing up for oneself with limit". The experience process were categorized into four stages: 'Facing Reality stage', 'Motivation stage', 'Desire Recovery stage', 'Self-Overcoming stage'. Conclusion: Most of the research for the recovery process was prognostic in nature and the results. This study was demonstrated certain indicators which can be useful in further research.

• Korean Journal of Biological Psychiatry
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• v.16 no.1
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• pp.46-52
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• 2009

Objectives : The goal of this study was to compare the clinical characteristics of panic disorder respiratory subtype(PD-R) and non-respiratory subtype(PD-NR). Methods : 84 patients with panic disorder were enrolled and divided into 2 groups, 29 PD-R and 55 PD-NR. Diagnosis of panic disorder was evaluated using Diagnostic and Statistical Manual of Mental Disorders $4^{th}$ edition and Mini International Neuropsychiatric Interview. They were also measured with Hamilton Rating Scale for Anxiety(HAM-A), Hamilton Rating Scale for Depression(HAM-D), and Panic Disorder Severity Scale (PDSS). Results : PD-R group showed significantly higher scores in PDSS than those of PD-NR group(p=.027). After controlling for the severity of panic disorder and gender, PD-R group showed higher HAM-D and somatic anxiety subscale of HAM-A than those of PD-NR group. Furthermore, results of logistic regression analysis suggested that the somatic anxiety was a possible risk factor of PD-R(OR=1.404,p=0.009). Conclusion : These results suggest that somatic anxiety and depressive symptom would be important clinical characteristics of PD-R.

• Korean Journal of Adult Nursing
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• v.24 no.1
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• pp.64-73
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• 2012

Purpose: The purpose of this study was to investigate emergency nurses' reported traumatic events, professional quality of life and physical symptoms. Methods: The design of the study was descriptive. The respondents were 157 Emergency nurses with the majority were women (94.3% female and 5.7% were men). Data were collected from September 28 to December 1, 2011. The professional quality of life (ProQOL) instrument is conceptualized with three sub-dimensions (compassion satisfaction, burnout, and secondary traumatic stress), in addition information about traumatic events, physical symptoms and demographic variables were collected. Burnout and secondary traumatic stress (STS) are two parts of compassion fatigue. Data were analyzed using the SPSS/WIN 18.0 program and included descriptive statistics, t-test, ANOVA, Pearson's correlations. Results: Thirteen percent of the participants reported a high ProQOL. Compassion satisfaction was negatively correlated with burnout and physical symptoms, whereas, traumatic events had positive correlations with STS. Also, burnout and STS were positively correlated with physical symptoms respectively. Conclusion: Since the level of professional quality of life among emergency nurses was relatively low it is recommended that an intervention program for emergency nurses be instituted to improve compassion satisfaction and to decrease compassion fatigue and physical symptoms.

• Korean Journal of Pharmacognosy
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• v.26 no.4
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• pp.360-367
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• 1995

The metabolism of ginseng saponins by human intestinal bacteria was studied using human feces under anaerobic culture conditions. $Ginsenoside-Rb_1$, $-Rb_2$ and -Rc(protopanaxadiol type) were mainly metabolized to compound-K(C-K), $20-O-[{\alpha}-L-arabinopyranosyl(1{\rightarrow}6)-{\beta}-{_D}-glucopyranosyl]-20(S)-protopanaxadiol(compound-Y,\;C-Y)$, $20-O-[{\alpha}-L-arabinopyranosyl(1{\rightarrow}6)-{\beta}-{_D}-glucopyranosyll-20(S)-protopanaxadiol(ginsenosied-MC,{\;}MC)$, respectively, and $ginsenoside-Rg_1$ and -Re(protopanaxatriol type) to their aglycon, 20(S)-protopanaxatriol, though the pathway and rate of the metabolism were affected by fermentation medium. C-K was not decomposed any more, while C-Y and Mc were both gradually hydrolyzed to C-K.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.20 no.4
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• pp.381-388
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• 2013

Purpose: This study was done to investigate nurses' awareness of death and the meaning of life and identify factors influencing the meaning of life. Methods: Participants were 198 women nurses who had experienced the death of patients. They answered a self-administered questionnaire including demographics, awareness of death scale and meaning in life II scale. Data were analyzed using descriptive statistics, t-test, ANOVA, Scheff$\acute{e}$ test, and multiple regression (enter method). Results: The average score for awareness of death was $127.3{\pm}10.14$. This score is moderate not biased toward positive or negative. The average score for meaning of life was $130.3{\pm}9.42$ with 51% for loss steps, 45.5% for pursuit steps and 3.5% for discovery steps to the meaning of life. Factors affecting the meaning of life were religion, Buddhism (${\beta}=6.25$, p=.015) or Atheist (${\beta}=5.91$, p=.017), educational level, Master's or higher (${\beta}=16.22$, p=.003), work department, special department (${\beta}=3.49$, p=.017). Conclusions: Results of the study indicate a need to provide nursing programs that will promote nurses' spiritual and inner maturity.

• The Journal of the Korean dental association
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• v.17 no.9 s.124
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• pp.701-708
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• 1979

A series of combined impressions, alginate impressions and rubber base impression made of the lower left quadrant of one subject having a cast gold crown with six reference marks on lower let 1st molar. the combined impressions of hydrocolloid were removed from the mouth at 2.5min, after the insertion of the tray. The alginate impressions were removed from the mouth at 2min, after the insertion of the tray. The rubber base impressions were removed from the mouth at 10min. The effect on the accuracy of the combined impressions, alginate impressions and rubber base impressions was obtained following results by comparing the distances between the reference marks in indirect stone cast with the standard measurements of the cast gold crown prior to cementation. The findings through this study could be summarized as follows; 1. The accuracy of combined impression was superior to that of alginate impression, but it was inferior to that of rubber base impressions. 2. Combined impressions produced a little distortion of the mesio-distal length, alginate impressions produced the largest distortion, ut rubber base impressions produced the least distortion.