• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.355-358
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• 2002

The network functional standard for MNP defines tile network functional structure and information flow to provide Number portability among the imt-2000 mobile phone. In this paper we define network function and system function and processing method of information which will be changed among them. In this paper, we also defines the processing method of SMS.

• The Journal of the Korea Contents Association
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• v.3 no.2
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• pp.73-77
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• 2003

Number portability is a policy for the increase of user benefits and promotion of telecommunications market competition. In June Un, local number portability (LNP) will be implemented in Korea. The technical solution of LNP will migrate via initial non-intelligent option (RCF) to intelligent option (QoR) from 2007 and number portability standard for 2G mobile uses QoR. The introduction of number portability needs to change operators' network and to implement the solution of LNP suitable to their network property. Therefore the purpose of this paper is to propose a suggestion for the technical options of number portability by the comparative study of merits and demerits of several solutions and the case study of several countries.

• Journal of IKEEE
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• v.3 no.1 s.4
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• pp.93-100
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• 1999

When providing MPEG-2 video service through the ATM network, the degradation of QoS caused by cell losses and cell errors occuring from ATM netwok was assessed by the end-users subjectively and then the relation between CLR, CER and subjective QoS of MPEG-2 video was analyzed. Cell losses and cell errors occuring from the ATM network were generated according to the normal and exponential distribution by NEM module. Video sources were divided into sports and drama by moving feature and were tested. The results of our experiments show that the excellent quality of subjective QoS grade 5 was achieved for a cell loss rate of $2{\times}10^{-7}$ and for a cell error rate of $2{\times}10^{-7}$ and the good quality of subjective QoS grade 4 was achieved for a cell loss rate of $2{\times}10^{-6}$ and for a cell error rate of $2{\times}10^{-6}$ When providing MPEC-2 video service through the ATM network, the results of our experiments will be used as valuable information to determine the network performance objectives for satisfying the QoS required by the end-users and to design the network.

• Journal of the Korea Institute of Military Science and Technology
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• v.21 no.4
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• pp.497-507
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• 2018

Tactical networks are evolving into an All-IP based network for network centric warfare(NCW). Owing to the flexibility of IP based network, various military data applications including real-time and multi-media services are being integrated in tactical networks. Because each application has diverse Quality-of-service(QoS) requirements, it is crucial to develop a QoS provisioning method for guaranteeing QoS requirements efficiently. Conventionally, differentiated services(DiffServ) have been used to provide a different level of QoS for traffic flows. However, DiffServ is not designed to guarantee a specific requirement of QoS such as delay, loss, and bandwidth. Therefore, it is not suitable for military applications with a tight bound of QoS requirements. In this paper, we propose a multi-layer network virtualization scheme that allocates traffic flows having different QoS requirements to multiple virtual networks, which are constructed to support different QoS policies such as virtual network functions(VNFs), routing, queueing/active queue management(AQM), and physical layer policy. The experiment results indicate that the proposed scheme achieves lower delays and losses through multiple virtual networks having differentiated QoS policies in comparison with conventional networks.

• Women's Health Nursing
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• v.26 no.1
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• pp.49-60
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• 2020

Purpose: Infertile women experience various physical, psychological, and relational problems that affect their infertility-related quality of life (QoL). This study investigated infertile women's infertility-related QoL with the goal of identifying how it is influenced by fatigue, depression, and marital intimacy. Methods: A sample of 140 infertile women was surveyed in a cross-sectional study. Data were collected from February to April 2018 using self-report structured questionnaires at three infertility clinics located in Jeonju, Korea. Data were analyzed using the independent t-test, analysis of variance, Pearson correlation coefficients, and stepwise multiple regression analysis in SPSS for Windows version 25.0. The subjects agreed to complete a face-to-face interview, including administration of the Fatigue Severity Scale, Depression Anxiety Stress Scale-21, Marital Intimacy Scale, and the Fertility Quality of Life tool. Results: The mean age of the participants was 35.6±4.3 years. Infertility-related QoL was negatively correlated with fatigue (r=-.42, p<.001) and depression (r=-.56, p<.001), and positively correlated with marital intimacy (r=.30, p<.001). Multiple regression analysis showed that depression (β=-0.44, p<.001), fatigue (β=-0.27, p<.001), and husband's attitude (β=-0.19, p=.007) had significant effects on the QoL of infertile women, accounting for 40.5% of the variance in infertility-related QoL. Conclusion: The study provides insights into how infertile women's infertility-related QoL was influenced by depression, fatigue, and their husbands' attitudes regarding infertility treatment. To improve infertile women's infertility-related QoL, healthcare providers should consider developing strategies to decrease depression and fatigue in infertile women and to address their husbands' attitudes.

• Women's Health Nursing
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• v.26 no.1
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• pp.28-36
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• 2020

Purpose: This study investigated lifestyle, depression, marital intimacy, and quality of life (QoL) in breast cancer survivors, with the goal of identifying the impacts of these factors on QoL. Methods: A sample of 146 breast cancer survivors was surveyed in this cross-sectional study. Data were collected from March 20 to May 30, 2019, using self-report structured questionnaires at a hospital located in Jeonju, Korea. Data were analyzed using the independent t-test, analysis of variance, Pearson correlation coefficients, and hierarchical regression analysis. Participants agreed to complete a face-to-face interview, including administration of the Health Promoting Lifestyle Profile II, Depression Anxiety Stress Scale 21-Depression Scale, Marital Intimacy Scale, and Functional Assessment Cancer Therapy-Breast Cancer tool. Results: QoL was positively correlated with lifestyle (r=.49, p<.001) and marital intimacy (r=.45, p<.001) and negatively correlated with depression (r=-.72, p<.001). Hierarchical multiple regression analysis showed that depression (β=-0.63, p<.001), marital intimacy (β=0.19, p=.001), and lifestyle (β=0.13, p=.031) had significant effects on the QoL of breast cancer survivors, accounting for 63.3% of variance in related QoL. Conclusion: This study provides insights into how breast cancer survivors' QoL was influenced by depression, marital intimacy, and lifestyle. To improve the QoL of breast cancer survivors, healthcare providers should consider developing strategies to decrease depression, to increase marital intimacy, and to improve lifestyle.

• Korean Journal of Adult Nursing
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• v.28 no.2
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• pp.202-212
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• 2016

Purpose: The purpose of this study was to assess the relationship between cognitive function impairment and quality of life (QoL) among patients with breast cancer. Specifically, the intention was to verify the mediating effects for promoting behaviors leading to better health and QoL. Methods: A purposive sample of 152 patients undergoing chemotherapy was recruited. A cross-sectional survey design was used. Data were collected using four instruments: Everyday Cognition Scale, Korean Mini-Mental State Examination, Functional Assessment of Cancer Therapy-Breast Cancer Version 4, and Health Promoting Lifestyle Profile. Results: The mean score for subjective cognitive decline was 65.84; the health promotion behavior was 95.89, and 83.34 for QoL. Health promotion behavior was directly affected by cognitive decline ($R^2=6.0%$) as was QoL ($R^2=43%$). Subjective cognitive decline (${\beta}=-.57$ p<.001) and health promotion behavior (${\beta}=.37$, p<.001) were seen as predicting factors in QoL and explained 56% ($R^2=56%$). Health promotion behavior had a partial mediating effect in the relationship between self-reported cognitive decline and QoL (Sobel test: Z=-3.37, p<.001). Conclusion: Based on the findings of this study, nursing intervention programs focusing on managing cognitive decline and promoting health promotion behavior are highly recommended to improve QoL in cancer patients.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.3
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• pp.1260-1269
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• 2011

The purpose of this study was to determine postoperative quality of life(QoL), thyroid specific symptoms(TSSs), self care compliance, anxiety and depression in patients with papillary thyroid cancer and to identify factors influencing their postoperative QoL. 154 patients were surveyed using structured questionnaires and data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation, and multiple regression with SPSS/WIN 18.0 program. The mean score of postoperative QoL in the subjects was 2.72 and the postoperative QoL score of social/family well being subscale showed the lowest score. Most of the subjects suffered from TSSs such as fatigue, cold intolerance, and mood swings. The most frequent activity for self care compliance was taking thyroid hormone(100%) and OPD follow up was the second activity(99.4%). Anxiety score was 45.3 indicating a medium level however 63% of the subjects were evaluated as depression status. Postoperative QoL in thyroid papillary cancer patients showed significantly negative correlations to TSSs, anxiety, and depression (r=-.573, p<.001; r=-.739, p<.001; r=-.742, p<.001). The factors influencing postoperative QoL were TSSs, anxiety, and depression, which explained about 64.9% of the variance. Thus to improve postoperative QoL in patients with papillary thyroid cancer, health care providers should relieve negative emotions related to long term cancer management, develop the support system and provide practical information to apply patients' physical, and psychological symptoms control.

• Journal of Information Processing Systems
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• v.8 no.4
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• pp.589-602
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• 2012

With the increasing demand for real time applications in the Wireless Senor Network (WSN), real time critical events anticipate an efficient quality-of-service (QoS) based routing for data delivery from the network infrastructure. Designing such QoS based routing protocol to meet the reliability and delay guarantee of critical events while preserving the energy efficiency is a challenging task. Considerable research has been focused on developing robust energy efficient QoS based routing protocols. In this paper, we present the state of the research by summarizing the work on QoS based routing protocols that has already been published and by highlighting the QoS issues that are being addressed. The performance comparison of QoS based routing protocols such as SAR, MMSPEED, MCMP, MCBR, and EQSR has also been analyzed using ns-2 for various parameters.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.93-94
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• 2006

In this paper, we propose a technical standard that applies to the MNP between 2G and 3G. We define network function, system function and information flow for MNP. We designed call processing mechanism for MNP by QoR. We also define the processing method of SMS according to the MNP.