• The KIPS Transactions:PartC
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• v.17C no.6
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• pp.459-464
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• 2010

Due to the application-specific nature of wireless sensor networks, the sensitivity to such a requirement as data reporting latency may vary depending on the type of applications, thus requiring application-specific algorithm and protocol design paradigms which help us to maximize energy conservation and thus the network lifetime. In this paper, we implement and evaluate a novel delay-adaptive sensor scheduling scheme for energy-saving data gathering which is based on a two phase clustering (TPC), in wireless sensor networks. The TPC is implemented on sensor Mote hardwares. With the help of TPC implemented, sensors selectively use direct links for control and forwarding time critical sensed data and relay links for data forwarding based on the user delay constraints given. Implementation study shows that TPC helps the sensors to increase a significant amount of energy while collecting sensed data from sensors in a real environment.

• Journal of Industrial Convergence
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• v.18 no.2
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• pp.9-18
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• 2020

Purpose is to systematically examine the factors related to patient safety nursing of nursing university students in a convergent and complex aspect and to identify the effect size through meta-analysis. The research method used PRISMA(Preferred Reporting Items for Systematic Reviews and Meta-Analyses). Medline, Embases, CINAHL, DBpia, Research Information Service System (Riss), and Korean Studies Information Service (Kiss) were used, while overseas databases were searched using MeSH terms and Emtrees. The search term was [(patient safety or patient harm or safety management) and (students, nursing)] or [(patient safety or patient harm or safety management) and (education, nursing, graduate)].The research found that nursing performance, knowledge, attitude, self-confidence, recognition, and cognition were found to be relevant factors in the order of confidence, attitude, recognition, and knowledge.

• Perspectives in Nursing Science
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• v.10 no.2
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• pp.158-166
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• 2013

Purpose: This study was conducted to investigate patient safety regulations and guidelines in order to understand their current status, and to examine support measures to improve patient safety in Korean hospitals. Methods: The participants were the safety officers from hospitals with 200 or more beds and 112 hospitals responded to the online survey. The questions covered patient safety regulations, the performance level of patient safety activities, patient safety incident reporting systems, the dedicated professional, training, support mechanisms, and expectations of reporting systems. Results: Among preventative measures, fall prevention and hand hygiene were reported to be most widely practiced (92% and 91%, respectively). Time-out for invasive procedures showed a relatively low practice rate at 70%. Among patient care activities, transfusion, surgery and sedation, medication, and infection management were performed by 84, 74, 93 and 93% of the hospitals, respectively. Patient safety activities included patient safety committee, patient safety cooperation between decision-making bodies, patient safety workshops, seminars, lectures, and training for employees. Conclusion: Patient safety regulations and guidelines have not yet been sufficiently prepared, and a public institution such as a certification authority is of crucial importance to enforce these guidelines.

• Journal of Communications and Networks
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• v.15 no.1
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• pp.77-86
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• 2013

Cognitive radio (CR) has emerged as one of effective methods to enhance the utilization of existing radio spectrum. Main principle of CR is that secondary users (SUs) are allowed to use the spectrum unused by primary users (PUs) without interfering PU's transmissions. In this paper, PUs operate on a slot-by-slot basis and SUs try to exploit the slots unused by PUs. We propose OSA protocols in the single channel and we propose an opportunistic spectrum access (OSA) protocols in the multi-channel cognitive radio networks with one control channel and several licensed channels where a slot is divided into contention phase and transmission phase. A slot is divided into reporting phase, contention phase and transmission phase. The reporting phase plays a role of finding idle channels unused by PUs and the contention phase plays a role of selecting a SU who will send packets in the data transmission phase. One SU is selected by carrier sense multiple access / collision avoidance (CSMA/CA) with request to send / clear to send (RTS/CTS) mechanism on control channel and the SU is allowed to occupy all remaining part of all idle channels during the current slot. For mathematical analysis, first we deal with the single-channel case and we model the proposed OSA media access control (MAC) protocol by three-dimensional discrete time Markov chain (DTMC) whose one-step transition probability matrix has a special structure so as to apply the censored Markov chain method to obtain the steady state distribution.We obtain the throughput and the distribution of access delay. Next we deal with the multi-channel case and obtain the throughput and the distribution of access delay by using results of single-channel case. In numerical results, our mathematical analysis is verified by simulations and we give numerical results on throughput and access delay of the proposed MAC protocol. Finally, we find the maximum allowable number of SUs satisfying the requirements on throughput and access delay.

• Journal of the Korea Convergence Society
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• v.13 no.1
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• pp.109-118
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• 2022

The purpose of this study is to identify trends in the application of artificial intelligence by analyzing upper extremity movement assessment and artificial intelligence convergence research using a systematic literature review method. The research was conducted using the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Among the 380 articles searched in three databases, 8 articles were finally selected according to the selection and exclusion criteria. For the evaluation of upper extremity movement, motion performance evaluation, FMA, and ARAT were used. For quantification, data were extracted using various tools, and upper extremity movement classification, recovery prognosis prediction, and evaluation tool score were predicted using artificial intelligence. This study is meaningful in that it systematically reviewed studies that objectively evaluated upper extremity movement using artificial intelligence and identified the direction in which artificial intelligence is being applied. Based on this, the introduction of artificial intelligence technology in the assessment of upper extremity movements is expected to help objectively identify the intervention effect and the patient's recovery.

• Korean Journal of Radiology
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• v.23 no.12
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• pp.1290-1300
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• 2022

Objective: "Diagnostic yield," also referred to as the detection rate, is a parameter positioned between diagnostic accuracy and diagnosis-related patient outcomes in research studies that assess diagnostic tests. Unfamiliarity with the term may lead to incorrect usage and delivery of information. Herein, we evaluate the level of proper use of the term "diagnostic yield" and its related parameters in articles published in Radiology and Korean Journal of Radiology (KJR). Materials and Methods: Potentially relevant articles published since 2012 in these journals were identified using MEDLINE and PubMed Central databases. The initial search yielded 239 articles. We evaluated whether the correct definition and study setting of "diagnostic yield" or "detection rate" were used and whether the articles also reported companion parameters for false-positive results. We calculated the proportion of articles that correctly used these parameters and evaluated whether the proportion increased with time (2012-2016 vs. 2017-2022). Results: Among 39 eligible articles (19 from Radiology and 20 from KJR), 17 (43.6%; 11 from Radiology and 6 from KJR) correctly defined "diagnostic yield" or "detection rate." The remaining 22 articles used "diagnostic yield" or "detection rate" with incorrect meanings such as "diagnostic performance" or "sensitivity." The proportion of correctly used diagnostic terms was higher in the studies published in Radiology than in those published in KJR (57.9% vs. 30.0%). The proportion improved with time in Radiology (33.3% vs. 80.0%), whereas no improvement was observed in KJR over time (33.3% vs. 27.3%). The proportion of studies reporting companion parameters was similar between journals (72.7% vs. 66.7%), and no considerable improvement was observed over time. Conclusion: Overall, a minority of articles accurately used "diagnostic yield" or "detection rate." Incorrect usage of the terms was more frequent without improvement over time in KJR than in Radiology. Therefore, improvements are required in the use and reporting of these parameters.

• Journal of the Korean Society of Radiology
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• v.84 no.1
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• pp.75-91
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• 2023

The technical parameters and imaging interpretation criteria of the Prostate Imaging Reporting and Data System version 2 (PI-RADS v2) using multiparametric MRI (mpMRI) are updated in PI-RADS v2.1. These changes have been an expected improvement for prostate cancer evaluation, although some issues remain unsolved, and new issues have been raised. In this review, a brief overview of PI-RADS v2.1 is and several critical points are discussed as follows: the need for more detailed protocols of mpMRI, lack of validation of the revised transition zone interpretation criteria, the need for clarification for the revised diffusion-weighted imaging and dynamic contrast-enhanced imaging criteria, anterior fibromuscular stroma and central zone assessment, assessment of background signal and tumor aggressiveness, changes in the structured report, the need for the parameters for imaging quality and performance control, and indications for expansion of the system to include other indications.

• Journal of Korean Academy of Nursing Administration
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• v.19 no.5
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• pp.613-621
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• 2013

Purpose: To identify the extents of nursing professionalism, clinical decision making abilities and job performance of advanced practice nurses and investigate the relationship among the variables Methods: Participants, selected by a convenience sampling method, were 135 advanced practice nurses working in 4 tertiary care general hospitals in 'B' Metropolitan City and in 1 tertiary care general hospital in 'J' city. Data collection was done from January 15 to February 28, 2013 using self-reporting questionnaires. Results: The average score for nursing professionalism of study participants was $81.19{\pm}7.56$. for clinical decision making abilities, $140.42{\pm}9.62$ and for job performance, $102.54{\pm}10.30$. These averages are relatively high. The relationship between the extent of nursing professionalism and the extent of clinical decision making abilities showed an intermediate level positive correlation (r=.45, p<.001). The relationship between the extent of nursing professionalism and the extent of job performance was also an intermediate level positive correlation (r=.42, p<.001). The extent of clinical decision making abilities and the extent of job performance was an intermediate level positive correlation (r=.41, p<.001). Conclusion: Developing a program, which can improve nursing professionalism and clinical decision making abilities of nurse, is required to enhance their job performance.

• Journal of the Korea Convergence Society
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• v.9 no.8
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• pp.343-353
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• 2018

The purpose of this study was to identify the effects of clinical nurses' emotional labor and professionalism, and verify the moderating effects of social support on nursing performance. A survey was conducted with 230 nurses working in general hospitals using self-reporting questionnaires in Seoul. It was found that the number of years in current department, professionalism, social support, and deep acting of emotional labor were affecting nursing performance. Social support perceived by clinical nurses moderates the deep acting of emotional labor and it positively influenced nursing performance. Results of this study indicate that nurse managers should focus on increasing nurses' professionalism and social support, and create working environments where nurses do more deep acting of emotional labor in order to increase nursing performance. This study contribute nurse managers to recognizing the impact of emotional labor, professionalism, and social support on nursing performance. Practical programs for increasing clinical nurses' professionalism, social support and decrease emotional labor is required to be developed in further research.

• Women's Health Nursing
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• v.16 no.1
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• pp.37-46
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• 2010

Purpose: This study aims to identify differences in breast self-examination (BSE) performance and influencing factors between woman-groups under and over 45 years old. Methods: The subjects were 152 women aged from 35 to 65, who were recruited through convenient sampling in a metropolitan city. They were divided into two groups: under and over 45 years old. The data were collected using self-reporting questionnaires and analyzed by $x^2$ test, t-test, Pearson's correlation coefficient, and stepwise multiple regression. Results: Experience of BSE education ($x^2$=4.68, p=.030), BSE performance ($x^2$=20.12, p<.001), confidence (t=-2.97, p=.003), and self-efficacy (t=-2.44, p=.016) were significantly higher in the group over 45 years (the older group) than the one under 45 years (the younger group). Self-efficacy (${\beta}$=.346, p=.004) and susceptibility (${\beta}$=.238, p=.002) were 17.6% of the variance in the younger group's BSE performance. On the other hand, significantly influencing factors on the older group's BSE performance were self-efficacy (${\beta}$=.500, p<.001) and BSE education (${\beta}$=.217, p<.001), which accounted for 25% of the variance in the BSE performance. Conclusion: We conclude that differentiated strategies of considering age should be established in nursing intervention to detect breast cancer early.