• Korean Journal of Family Social Work
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• no.55
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• pp.189-236
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• 2017

This study utilized the Giorgi's phenomenological analysis to understand the rearing experiences of the single adolescent parent. The study consisted of eight single parents living in the local community. The single parents had given birth during the ages between 16 and 24 and were currently rearing children between 6 months and 11 years of age. The results of the research consisted of 140 meanings, 34 subcategories, and 7 structure factors. The final structure factors consisted of 'onset as an escape from the unfulfilling reality', 'conflict upon unexpected choice situation', 'difficulties of starting and adapting to single adolescent parenting', 'brutal realities of at home single parenting', 'search for the best parenting role for the young parent', 'changes and growth associated with discovering one's self identity as a single parent', and 'concerns and wishes for a better life of the single adolescent parent'. Based on the results, discussions and suggestions to better understand the experiences of the single adolescent parent with anticipations for organized institutional aid and changes of the social attitude have been proposed.

• Journal of KIISE:Information Networking
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• v.32 no.4
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• pp.508-514
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• 2005

The research in internetworking between UMTS and WLAN, which is completed with merits and demerits, Is actively progressed to establish global roaming environments. This internetworking is classified into two groups: loosely-coupled and tightly-coupled. h tightly-coupled mechanism demands lots of investment and considerable amountof time to construct, which is directly connoted between UNTS and WLAN via IWU. On the other hand, a tersely-coupled mechanism is more scalable and easier to implement than a tightly-coupled one while it has critical drawbacks of packet loss and blocking of services due to handover delay. To alleviate these drawbacks. this work proposes a handover scheme between UMTS and WLAN, which is based on HMIPv6. The performance of the proposed scheme is evaluated by the simaulation. The proposed internetworking scheme based on HMIPv6 shows hotter performance than those based on MIPv6.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.4
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• pp.41-46
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• 2016

Recently, many domestic and foreign corporates are concentrating in investment to wearable devices and users are provided with various service based on wearable devices 26% more than compared to last year. It is widely used in previous healthcare, smart work, smart home environment, and it is now introduced to get connection to fused service environment. However, as products of G company are commercialized, the security issue of personal information is causing dispute in society, and the danger of data management and security regarding telecommunication is increasing. Also, because the password system used in previous wireless environment is still in use, there are possible vulnerability considering the new and mutant security threat. This thesis conducted study about protocols that can exercise safe telecommunication in the basis of wearable devices. In the registration and certification process, the signature value is created based on the code value. The telecommunication method is designed to conduct safe telecommunication based on the signature value. As for the attack method occurring in the wearable device environment, the safety was analyzed and conducted performance evaluation of previous password system and proposal system, and verified about 14% of efficiency.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.47 no.5
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• pp.61-66
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• 2010

A stereo vision, which is based on two or more images taken from different view points, is able to build three dimensional maps of its environment having various applications including robots and home networks. SAD algorithm, which is based on area-based correlation, is widely used since its regular structure provide abundant parallelism. In this paper, we present heuristic designs of SAD algorithm to meet the demands on accuracy and resource usages in various applications. The disparity abridgement and the window abridgement algorithms can be used for vision systems in low cost and small size. The window shape algorithm can be applicable when object are in specific shapes. The adaptive window algorithm work well when accuracy is the primary concern.

• Natural Product Sciences
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• v.27 no.2
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• pp.128-133
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• 2021

The Coumarin (1,2-benzopyrone) is the main secondary metabolite of Mikania laevigata Sch. Beep ex Baker and Mikania glomerata Spreng., which are popularly known as guaco. These plants have been used mainly in traditional medicine in the treatment of respiratory diseases because their bronchodilator effect. However, there are around 200 species of Mikania, which are quite similar in appearance. From these, only M. leavigata and M. glomerata have high concentrations of coumarins. In this line, the falsification of products Mikania based has been frequent. In this sense, this work demonstrated the application of the easy, fast, e not destructive method based in Nuclear Magnetic Resonance in quantitative mode (qNMR) for the determination of coumarin in both commercial and homemade guaco products. Thus, in the first step the compounds were extract from guaco leaves and syrups using chloroform (CHCl₃), with or without ultrasound. About the method, was linear with a R² = 0.9947 for 1,2-benzopyrone, with detection and quantification limits with were 0.11 and 0.36 mg mL^-1 respectively. In the same line, the method was safe with RSD <0.3% and with recovery ranging from 93-101%. To confirm the applicability of the method, in the last step was applied to 10 real samples (6 from leaves and 4 from syrups). The content of the coumarin in the leaf extract ranged from 0.62 to 1.30 mg mL^-1. For syrups I, II and IV, the content of coumarin was in accordance with the manufacturers. However, for de Syrup III, the concentration was 155% higher. In summary, the qNMR is a rapid method with minimal sample preparation that can be used to quantify coumarin in home-made plant extracts as well as in commercial samples as syrup for instance. This method is applicable for quality control of different plants-based products.

• Journal of the Korean Electrochemical Society
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• v.13 no.4
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• pp.240-245
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• 2010

This work explored the catalytic effect of Pt in multi-wall carbon nanotube and poly-pyrrole conductive polymer electrocatalysts (Pt/PPy/MWCNT). A home-made Pt/PPy/MWCNT catalyst was first evaluated by comparing its electrochemical active surface area (ESA) with E-Tek commercial catalysts by cyclic voltammetry in $H_2SO_4$ solution. Then, the methanol oxidation currents of Pt/PPy/MWCNT and the hydrogen peaks in $H_2SO_4$ solution were serially measured with microporous electrode. This provided the current density of methanol oxidation based on the ESA, allowing a quantitative comparison of catalytic activity. The current densities were also measured for Pt/C catalysts of E-Tek and Tanaka Precious Metal Co. The current densities for the different catalysts were similar, implying that catalytic activity depended directly on the ESA rather than charge transfer or electronic conductivity.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.310-314
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• 2009

In this paper we propose the U-VR Simulator which seamlessly connects entities in real and virtual environments by exploiting context, based on the concept of ubiquitous virtual reality. Using the U-VR Simulator, a smart home environment can be simulated and new virtual entities such as sensors, actuators, and services can be added to existing real entities. The proposed approach is fast and cost-effective because the simulator effectively utilizes both existing and simulated devices. In addition, our approach allows application developers to rapidly develop U-VR applications and extend them to relevant domains. As a future work, we will expand our simulator to intelligently augment virtual entities into real environments.

• Journal of Energy Engineering
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• v.24 no.3
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• pp.13-19
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• 2015

The wood pellet is standardized of woody type fuel which of small cylindrical shape that is produced compress wood remnants in process of woody processing. The pellet is critical energy which expects to increase of the amount used in future. It consumes fuel which of home, common facilities stove and boiler, district heating, and CHP, etc. This study was to develop a movable pellet manufacturing equipment that can be mounted on a truck. The pellet production volume is approximately 309kg per hour, daily output is about 2ton. One days work based on the expected revenue of approximately \268,000 feasibility is considered sufficient.

• Journal of Families and Better Life
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• v.30 no.2
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• pp.153-172
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• 2012

The purpose of this study was to find out cultural differences and types of adjustments made in response to the differences between married female immigrants and Korean men of multicultural families. The data were collected by in-depth interviews with 15 female immigrants and 5 Korean men. The major findings of this study were as follows : The female participants experienced cultural differences between Korea and their country in the areas of living culture, stereotyped gender role, and family's cultural traits. The male participants reported cultural differences in terms of the economic supports provided to the wife's family. The types and strategies of acculturation were as follows : adjusting themselves to the spouse's cultural type, the couple's mutual acceptance of the other's cultural type, and female participants resignation to accept help from their husband. The types of acculturation to the cultural differences based on couples' personal efforts and hard work invested into acculturation and the support from their family and society. The results of the study supported that multicultural families' perception of cultural differences and types of adjustment originited from their own experiences and cultural background.

• Journal of Families and Better Life
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• v.31 no.1
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• pp.85-98
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• 2013

The goal of this study is to evaluate the effectiveness of a program which can improve the marital satisfaction of newlywed couples. The program was practiced once a week for 4 weeks at K healthy family center and each session lasted for 100 minutes. The participants of the program were 5 newlywed couples who desired to increase their relationship and marital satisfaction. In order to investigate the effectiveness of the program, we used the Wilcoxen signed rank test. The results of the analyses, showed that there were significant differences of increases in the areas of the newlywed couples' marital satisfaction, communication efficiency, conflict coping strategies, and self-esteem. In conclusion, the effectiveness and utilization of the program were confirmed. Also, it was verified that the program can be an important tool for strengthening healthy family functioning through a study on newlywed couples in the field of community-based family work practice.