• Journal of the Institute of Electronics Engineers of Korea TC
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• v.46 no.12
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• pp.22-29
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• 2009

In this paper, we developed the 200-Watts SSPA(Solid State Power Amplifier) for the X-band pulse compression solid state radar. The developed X-band SSPA is consists of 3-stage CSA(Corporate Structured Amplifier) modules in pre-amplifier stage, driver-amplifier stage and main-power amplifier stage. The main-power amplifier stage of SSPA designed by balanced type using GaN HEMT with enough power and gain to generate power more than 200-Watts in X-band. The developed SSPA has performance with more than total gain 59dB and output power 200-Watts in condition of frequency range 9.2-9.6GHz, pulse period 1msec, pulse width 100usec and duty cycle 10%. The developed SSPA in this paper can apply to high quality solid state radar system with pulse compression technique.

• Child Health Nursing Research
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• v.24 no.2
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• pp.208-219
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• 2018

Purpose: The purpose of this study was to explore nursing students' experiences of debriefing after simulation-based learning and to obtain fundamental data to support the development of effective teaching strategies. Methods: Sixty-seven nursing students participated in this study from April to May, 2017. This was a descriptive study analyzing the content of students' descriptions of structured questions in 3 stages (description, analysis, and application) based on recorded videos. Results: The description stage was classified into 3 categories for problem recognition, 4 categories for the nursing plan, and 6 categories for the nursing intervention. The analysis stage was classified into 6 categories for satisfactory practice, 3 categories for experience and 4 categories for what they learned through practice. The application stage was classified into 5 categories, that were to be mastered, and 6 categories, that were important to recognize. Conclusion: This study succeeded in charaterizing learners' experiences of debriefing. During the debriefing, students watched recorded videos, and we found that self-evaluation through structured questionnaires could be a very effective way to strengthen students' core competencies. Our content analysis of the debriefing is expected to contribute to the development of effective strategies in simulation-based education for students and nurses.

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.3
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• pp.1063-1067
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• 2015

Background: Tumor associated fatigue (TAF) or cancer related fatigue (CRF) is not a new concept. Nonetheless, no real headway has been made in the quantitative analysis of its successful treatment via cognitive behavioral therapy. Since 20 to 30% of all breast cancer patients suffer from anxiety and/or depression within the first year of their diagnosis, this issue needs to be addressed and a standard treatment protocol has to be developed. This study focused on developing a simple, reproducible and short (8 weeks) protocol for the cognitive behavioral therapy support of tumor associated fatigue patients. Materials and Methods: Between the year 2011 and 2012, 23 breast cancer patients fulfilled the diagnosis TAF requirements and were introduced into this study. Our method focused on a psycho-oncological support group using a predetermined, highly structured and reproducible, cognitive behavioral therapy treatment manual. Eight weekly, 90 minute sessions were conducted and patients were evaluated before and after this eight session block. Tumor fatigue specific questionnaires such as the multidimensional fatigue inventory (MFI) as well as the hospital anxiety and depression scale (HADS) were used in order to quantitatively evaluate patient TAF. Results: Of the 23 patients enrolled in the study, only 7 patients fulfilled the TAF diagnostic criteria after the psycho-oncological group treatment. This represents a 70% reduction in diagnosable tumor associated fatigue. The HADS analysis showed a 33% reduction in patient anxiety as well as a 57% reduction in patient depression levels. The MFI scores showed a significant reduction in 4 of the 5 evaluate categories. With the exception of the "mental fatigue" MFI category all results were statistically significant. Conclusions: This study showed that a highly structured, cognitive behavioral therapy group intervention will produce significant improvements in breast cancer patient tumor associated fatigue levels after only 8 weeks.

• Journal of Music and Human Behavior
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• v.11 no.2
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• pp.41-57
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• 2014

The purpose of this study was to analyze music therapy students' experience of peer supervision as supervisee. A total of 17 participants in a university in Seoul, participated two times in structured dyadic peer supervision with a different student. In-depth, semi-structured interviews with the students were conducted and content analysis was used for analyzing the data. The results showed that peer supervision was recognized as an important technique as students experienced an accepting and supportive emotional climate that increased their motivation in terms of their professional growth. However, the students also experienced anxiety and dissatisfaction when they could not get a definitive answer from their peer or their peer could not solve their problem. The structure of peer supervision could help the participants by facilitating the process, providing directions, and promoting interaction between peer. This study is significant that it provides actual content in music therapy students' experiences as a supervisee, and enables students to apply peer supervision to their professional growth.

• Journal of Korea Multimedia Society
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• v.9 no.10
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• pp.1361-1370
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• 2006

Recently fast innovation of Internet technology causes lot of application to change into web application and requirement for the inter-operable communication among various systems are increased rapidly. These trends are part of changes which is caused by ubiquitous world and it is just beginning of huge waves that is required to fit and change under the ubiquitous environments. This thesis is focused on the Design and Implementation of Layer Structured Components which can be interfaced effectively for the Material Management System under the Heterogeneous Client Server Environments. The key points to do that kinds of affairs are using XML web services that can communicate thru systems and also using independent layered components for the enforcement of reusability and inter-operability. For the various type of testing of implementation, we used RFID System, PDA, Desktop Systems and confirmed the normal operation without concerning the type of client system and platforms. The Components proposed in this thesis could be reused effectively in case of developing similar applications.

• Journal of Korean Academy of Nursing
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• v.29 no.3
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• pp.507-517
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• 1999

The purpose of this study is to understand home care needs for parturient women and neonates up to the postpartum period. Methodology : The design of this study is a cross-sectional survey study. The subjects of this study are 88 postpartum mothers who delivered a first baby during the period from December 1996 to July 1997. Data collection was done with a structured questionnaire by mailing. Data were collected at the point of six months after delivery. A structured questionnaire composed of items related to home care needs. Data analysis was done with descriptive statistics. The study results are as follows : .The highest need was personal hygiene(93.2%) for the parturient women, and the peak period was the two week period after delivery. .The most frequent maternal needs regarding neonates were cord care (72.4%) during the first week, elimination(67.9%) during the first two weeks, baby crying(88.3%) and sleeping pattern(71.5%) at one month after delivery, and baby temperament(30.4%) at sixth months after delivery. .The mothers requested home care methods such as written material for self health care (35%) and counseling(34%) and direct home visits (5%) for neonate care. - Conclusion : The most important period for home health care needs was one week after delivery, and the health care needs for neonate temperament, behavior and sleeping pattern rose rapidly at the period of 6 months after delivery. Therefore it could be concluded that the postpartum home care should be done by those, written material should be enhanced for parturient women care, and counseling enhanced for neonate care.

• Journal of Korean Academy of Nursing
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• v.29 no.6
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• pp.1208-1220
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• 1999

The purpose of this study was to describe the differences in three phenomenological research methods used to understand the experience of families of patients with cancer and so provide as guideline to novices first attempting qualitative research. The subjects were 3 family members - spouse, daughter, daughter-in-law -of cancer patients at S-hospital. Unstructured deep interviews were carried out and taped for further analyzed. Interviews were analyzed using three phenomenological methods ; Giorgi's, Colazzi's, and Van Kaam's. The results are as follows. : The experience of family the analyzed using Giorgi's method showed different characteristics according to the family members' role. According to Colaizzi's method, they experienced burden, a willingness to care, role conflict, thanks to family and significant others, and ambivalence about treatment. Using Van Kaam's methodology, two categories were identified ; change of family function and burden. Themes in change of family function were positive attitude(9), role conflict(6), negative attitude(5), active attitude(2), and passive attitude(2) ; Themes in burden were emotional burden, physical burden, and economic burden. The result from using Giorgi's method were centered or individual characteristics and these results constituteds situational structured description and a general structured description. From Colaizzi's method the focus was on the common experience of all fo the subjects. In Van Kaam's method, subthemes (13), themes(8), and categories(2) were identified. So researchers should choose the qualitative method according to their research goals and methodological characteristics.

• Journal of Korean Academy of Nursing
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• v.37 no.2
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• pp.242-248
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• 2007

Purpose. Parkinson's disease (PD) is a common neurodegenerative disorder characterized by motor disabilities and increasing dependence on others for daily life activities with consequent impact on patients' and caregivers' quality of life. The aim of this study was to elucidate the burden on primary caregivers of patients with PD, and identify related factors. Methods. A cross-sectional descriptive study. Seventy-six primary caregivers of PD patients in a neurology out-patient clinic, Seoul, Korea completed structured questionnaires, of which 68 were analyzed. The structured self-report questionnaire included (1) demographic information on the caregivers, (2) information regarding the disease characteristics of the patients, and (3) the subjective and objective caregiver burdens as assessed on Montgomery, Gonyea, & Hooyman's scale. Results. The mean age of the caregivers was 54.56 years, and spouses represented the largest proportion (47.0%). Caregivers of PD patients experienced high levels of burden (mean scores on the subjective and objective burdens were 45.22 and 34.90, respectively), which were comparable to the caregiver burdens in stroke, and higher than the caregiver burdens in general chronic disease. Older caregivers and spousal caregivers experienced significantly higher burdens (p=.004 and p=.019, respectively). A greater motor disability and higher modified Hoehn and Yahr grade were related to higher caregiver burden (p=.001 and p=.018, respectively). Conclusion. Caring for PD patients is associated with a high level of caregiver burden. Therefore, healthcare professionals should identify the burden of caregivers who look after PD patients and develop comprehensive management strategies both for patients and their caregivers.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.8
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• pp.1452-1459
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• 2016

Compressed sensing is a signal processing technique for efficiently acquiring and reconstructing in and under Nyquist rate representation. Generally, the measurement prediction usually works well with a small block while the quality of recovery is known to be better with a large block. In order to overcome this dilemma, conventional research works use a structural measurement matrix with which compressed sensing is done in a small block size but recovery is performed in a large block size. In this way, both prediction and recovery are made to be improved at same time. However, the conventional researches did not compare the performances of the structural measurement matrix, affected by the block size. In this paper, by expanding a structural measurement matrix of conventional works, their performances are compared with different block sizes. Experimental results show that a structural measurement matrix with $4{\times}4$ Hadamard transform matrix provides superior performance in block size 4.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.12B
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• pp.818-830
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• 2005

Recently, Peer-to-Peer (P2P) overlay networks like CAN, Chord, Pastry and Tapestry offer a novel platform for scalable and decentralized distributed applications. These systems provide efficient and fault-tolerant routing, object location, and load balancing within a self-organizing overlay network. Content Delivery Network (CDN) is an intermediate layer of infrastructure that helps to efficiently deliver the multimedia content from content providers to clients. In this paper, We propose a topology-aware P2P overlay network for CDN, Rosary, in which CDN servers perform Intra-Pastry and Inter-Pastry routing based on a two-level structured overlay network. This proposed system extends pastry by adapting itself to CDN environments, where a semi-hashing based scheme for Intra-Pastry routing is introduced, and dynamic landmark technology is used to construct the topology-aware overlay network. Through simulations on NS-2, it is shown that Rosary is scalable, efficient, and flexible.