• Journal of Information Technology Services
• /
• v.9 no.2
• /
• pp.151-161
• /
• 2010

Recently, as the era of ubiquitous has arrived, an infrastructure for the short-distance wireless communication has been extended socially, and thus a variety of services are being proposed. The Multimedia Contents Delivery System using the ZigBee, in particular, has an important stance in enlargement of a variety of services in the aspect of individual-oriented service support though Wireless Personal Area Network (WPAN). Nonetheless, the ZigBee, or the IEEE 802.15.4 Standard, has many restrictions on the Multimedia Contents Delivery System due to the low data transport rate. In order to improve the ZigBee which presents a limit on the transport rate at the IEEE 802.15.4 Standard, this thesis has designed the burst mode which is a method of transmitting a certain amount of data in block units at a high speed without any stoppage until the completion of the transmission. Also, to provide a Multimedia Contents Delivery Service with an application of the normal data transmission mode, it improved the transmission performance of the ZigBee. In addition, for the Multimedia Contents Delivery Service under the ubiquitous environment, it designed and implemented a broadcasting Multimedia Contents Delivery System based on the ZigBee to conduct a comparative analysis on the data transmission performance according to the transmission method.

• The Journal of Korean Obstetrics and Gynecology
• /
• v.33 no.2
• /
• pp.63-76
• /
• 2020

Objectives: The purpose of this study is to compare postpartum symptoms of 528 women by age groups and delivery method through health questionnaires of postpartum care center. Methods: From January 2018 to December 2018, we statistically compared the 528 women's postpartal symptoms who divided into 4 age groups using SPSS Statistics 21.0 program. Results: There were no differences in weight changes, gestational age and degree of subjective discomfort by age (p>.05). On the other hand, parity, fetal weight and delivery method were statistically associated with age (p<.05). Especially the rate of cesarean delivery was increased with age. Degree of feeling dyspepsia and edema was higher in cesarean section delivery group (p<.05). Also, as the weight increased by 1 kg during pregnancy, the degree of feeling postnatal edema increased by 0.204 (β=0.204, t=4.204, p<.05). Conclusion: This study showed that age itself will not affect postpartum symptoms alone. Instead it is necessary to consider post-cesarean delivery symptoms for advanced maternal age.

• Journal of Microbiology and Biotechnology
• /
• v.15 no.2
• /
• pp.451-454
• /
• 2005

Introduction of foreign genes into brain cells, such as neurons and astrocytes, is a powerful approach to study the gene function and regulation in the neuroscience field. Calcium phosphate precipitates have been shown to cause cytotoxicity in some mammalian cells and brain cells, thus leading to low transfection efficiency. Here, we describe a retrovirus-mediated gene delivery method to transduce foreign genes into brain cells. In an attempt to achieve higher gene delivery efficiency in these cells, we made several changes to the original method, including (1) use of a new packaging cell line, Phoenix ampho cells, (2) transfection of pMX retroviral DNA, (3) inclusion of 25 mM chloroquine in the transduction, and (4) 3- 5 h incubation of retroviruses with target cells. The results showed that the modified protocol resulted in a range of 40- 60% gene delivery efficiency in neurons and astrocytes. Furthermore, these results suggest the potential of the retrovirus-mediated gene delivery protocol being modified and adapted for other transfection-refractory cell lines and primary cells.

• International Journal of Advanced Culture Technology
• /
• v.9 no.2
• /
• pp.39-46
• /
• 2021

This study wanted to find out what college students thought about family participated delivery and what concerns they had. To this end, eight college students aged 20 to 25 were interviewed three times. The data collection period was from March 20 to April 10, 2021. Interview materials were collected and interpreted simultaneously using the Giorgi method, a phenomenological research method. As a result of the analysis, 29 semantic units were derived, 12 subcomponents were grouped again, and five categories were formed as final components. The five categories of thoughts on the participated delivery of college students consisted of Responsibility, Happiness, Stability, Shame, and Anxiety. Based on the above meaning, college students were found to be comfortable with their families and to be more comfortable with birth happiness, while also feeling the risk of infection and shame as women. Accordingly, this study suggests that when participating in the delivery of family participation of college students who will be future parents, a systematic protocol will be established to thoroughly prepare for infection and protect women's privacy.

• Women's Health Nursing
• /
• v.23 no.2
• /
• pp.78-88
• /
• 2017

Purpose: This study aimed to understand meaning and essentials in work experiences of delivery room nurses. Methods: A phenomenological perspective was used for this qualitative research. Ten delivery room nurse with more than 3 years of work experience participated in this study. Data were collected through individual in-depth interviews with the nurses, between December 2012 and April 2013. Data were analyzed using Colaizzi's method. Results: Nine theme clusters and four categories emerged from the data as follows: 1) factors influencing career decision-making, 2) gap between reality and expectations, 3) difficulties with working in the delivery room, and 4) motivation to work in the delivery room. Conclusion: Based on the results of this study, strategies to improve working environment of the delivery room nurses are necessary. Also, better policy are required to firmly establish the role of the delivery room nurses' role as recognized professionals.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.13 no.4
• /
• pp.551-560
• /
• 2010

In this paper, we suggest a localization method of factors affecting the accuracy of Air-to-Ground weapon delivery. The proposed method, called FBEL(Factor-Based Error Localization), is based on the fault localization technique widely utilized in the realm of software engineering field. FBEL localizes the major factors affecting the performance of weapon delivery. To analyze the effectiveness and the applicability of FBEL, we applied FBEL to real firing data and got the major factors caused the errors. We expect that the method could contribute to improve the quality of weapon delivery system. We also expect that it may aid improvement of pilot capability greatly, if it is applied to pilot firing training.

• Women's Health Nursing
• /
• v.20 no.1
• /
• pp.1-13
• /
• 2014

Purpose: This study was to understand the meaning of women's experience of spontaneous delivery with midwives at midwifery clinics or home. Methods: van Kaam's Psychophenomenological method composed of a four-stage, 12-step format was used. In-depth interviews were carried out from January to July, 2011, with twelve women. Results: Through the data analysis, 403 significant statements, 172 elements, 48 subcategories, and 19 categories were extracted, and from the 19 categories, 8 themes were drawn. The eight themes were: "Conflict on whether a hospital or a midwifery clinic", "Choosing natural delivery with the assurance of her ability to delivery spontaneously and having trust in the midwives." "Being encouraged by a midwife and family members with one accord", "Experience of the spontaneous delivery process on body", "Comfortable delivery in spite of painful process", "Deeply impressed by the overwhelming joy of birth", "Satisfaction with spontaneous delivery", and "Deeper love among family members". Conclusion: Through this study, women's delivery experiences with midwives was of spontaneous delivery. Women's birth of self-confidence and trust between the midwives and the women to predict a spontaneous delivery is a powerful factor. Also, family support and midwives delicate care was identified as factors in spontaneous delivery.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2006.11a
• /
• pp.390-395
• /
• 2006

Recently, construction industry demands have been changed by domestic construction circumstances such as high-technology, mega-projects, and the complexity of construction. In order to deal with the change of such a domestic construction circumstances, the Ministry of Construction and Transportation (MOCT) has introduced advanced delivery methods (i..e, CM, DB, etc.). However, the advantages and disadvantages of the advanced delivery methods have not been effectively applied for previous projects. The reason for this is that the "Reviewing Standard for the Large-scale Construction Bidding Method" has not reflected enough project characteristics when the delivery method is selected in the project planning phase. Therefore, this paper proposes the model for selecting criteria of delivery method based on project characteristics in the Multi-housing projects.

• Korean Journal of Construction Engineering and Management
• /
• v.8 no.2
• /
• pp.75-83
• /
• 2007

Recently, the Design-Build (DB) delivery method in public sector makes some argument by reason of the initial cost which is more higher than those of Design-Bid-Build (DBB). According to the results of pervious researches related to the performance evaluation of delivery method, DB can lead the reduction of project cycle time and also is superior to the traditional DBB in terms of construction quality. The performance on each delivery method could be generally evaluated by a project cost and a project cycle time as one of quantitative analyses, and also by construction quality as one of qualitative analyses. In most researches, the evaluation of performance level based on delivery methods has been evaluated by the degree of their satisfaction through the interview with owners. Therefore, this paper analyzed the design documents of construction projects delivered by traditional DBB and DB in bridge construction projects in order to measure design quality, constructability, maintainability, and etc. As an above-mentioned analyses, finally, this research shown that how much the difference of performance level is by each delivery method.

• Korean Journal of Construction Engineering and Management
• /
• v.16 no.5
• /
• pp.86-96
• /
• 2015

According to previous research, the reason why Design-Build(hereinafter "DB") outperforms Design-Bid-Build(hereinafter "DBB") in terms of cost is due to less change orders(hereinafter "COs"). However, if biddropping was low for DBB resulting into increasing COs, then it would be wrong to conclude that DB is superior due to less COs. Therefore, in order to confirm such misjudgment, the attempt to comprehensively analyze biddropping, COs and delivery method was made as previous methods had analyzed either the relationship between delivery method and COs, or biddropping and COs. This research uses path analysis, which simultaneously compares effect sizes on COs according to delivery method and biddropping based on the project type, and validated the mediator effect. The research proved that DB outperforms DBB due to less COs cannot be validated as biddropping caused a mediator effect by intervening between the delivery method and COs for specific project types. Therefore, the mechanism of delivery method acts on COs through biddropping was established. Also, the identity of biddropping was investigated in a different perspective from previous research. Based on this result, this research is expected to help determine a delivery method by considering the mediator effect of specific projects and evaluate performance.