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Opportunistic Reporting-based Sensing-Reporting-Throughput Optimization Scheme for Cooperative Cognitive Radio Networks

  • So, Jaewoo
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.11 no.3
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    • pp.1319-1335
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    • 2017
  • This paper proposes an opportunistic reporting-based sensing-reporting-throughput optimization scheme that maximizes the spectral efficiency of secondary users (SUs) in cooperative cognitive radio networks with a soft combining rule. The performance of cooperative spectrum sensing depends on the sensing time, the reporting time of transmitting sensing results, and the fusion scheme. While longer sensing time and reporting time improve the sensing performance, this shortens the allowable data transmission time, which in turn degrades the spectral efficiency of SUs. The proposed scheme adopts an opportunistic reporting scheme to restrain the reporting overhead and it jointly controls the sensing-reporting overhead in order to increase the spectral efficiency of SUs. We show that there is a trade-off between the spectral efficiency of SUs and the overheads of cooperative spectrum sensing. The numerical results demonstrate that the proposed scheme significantly outperforms the conventional sensing-throughput optimization schemes when there are many SUs. Moreover, the numerical results show that the sensing-reporting time should be jointly optimized in order to maximize the spectral efficiency of SUs.

A Study on The Aviation Incident Reporting System (항공 준사고보고 제도에 관한 고찰)

  • Kang, H.C.;Choi, Y.K.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.9 no.2
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    • pp.23-36
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    • 2001
  • The effort to secure the aviation safety in each country of the world including our country, is one step more strengthening. For one of this effort, some advanced countries in aviation safety are operating the aviation incident reporting system, and in our country the aviation incident reporting system; Korea confidential incident reporting system is operated on Jan. 1. 2000. This article is introducing for those theoretical, politics and operational backgrounds of the aviation incident reporting system, foreign countries aviation incident reporting systems and our aviation incident reporting system including those status of reporting, and analysis.

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Effect of Senior Managers' Characteristics on Project Manager's Reporting Tendencies and Information Systems Development Performance (프로젝트 상급자 특성이 프로젝트관리자의 보고 성향과 시스템 개발성과에 미치는 영향)

  • Jang, Si-Young;Oh, Man-Seok
    • Journal of Information Technology Applications and Management
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    • v.19 no.2
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    • pp.149-179
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    • 2012
  • This study explores the reporting tendencies of project managers when sending a status reports to their respective senior managers in information systems development project. It also examines the effect of selective reporting on report quality and systems development performance. The research model is proposed based on literature survey as well as key points from Iacovou et al. [2009] which is an extension of selective reporting in information systems project. Analysis of responses from 257 project managers in information systems industry indicates that pessimistic reporting by project managers has negative effect on both report quality (mediator variable) and systems development performance, while optimistic reporting has no significant effect on systems development performance. The CEO interest has an impact on the senior manager's power, which in turn leads to optimistic reporting by project managers. The senior manager's character has an impact on the senior manager's leadership, which in turn leads to pessimistic reporting. No direct relationship exists either between CEO interest and optimistic reporting or between senior manager's character and pessimistic reporting. In addition, trust toward the senior managers is significantly related to pessimistic reporting. Finally, report tendencies are also found to be affected by the active/passive characteristics of project managers.

A Study on the Physician's Behavior of Notifiable Communicable Diseases Reporting and its Characteristics Related (법정전염병 신고행태 및 관련특성 연구)

  • 이윤현;맹광호
    • Health Policy and Management
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    • v.9 no.4
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    • pp.41-64
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    • 1999
  • The major concern for this research is to discuss and to offer some solutions to bring the effectiveness of existing notifiable diseases reporting system over the physicians' attitudes of reporting, the actual condition of performance and the reasons of inertia in notifiable diseases reporting through examining the physicians of medical institutions in nationwide such as pediatrics, internal medicine and family medicine. The actual conditions of notifiable communicable diseases(NCD) reporting was surveyed by mail objectifying an internal medicine, pediatrics and family medicine in nationwide on the basis of stratified random sampling method divided into the classification of medical institutions and areas. As a result of survey. the rate of respondents showed 145 persons from physicians, 105 persons from hospitals. 120 persons from general hospitals, and 51 persons from tertiary hospitals. The total number of respondents were 421 and was rated 59.0 %. The analysis of collected survey went through a descriptive analysis primarily to grasp physicians' attitudes on the notifiable communicable diseases reporting, and then upon the dependent variables. Following are major findings obtained form the data analysis. 1. The results of a descriptive analysis on physicians' attitudes towards reporting NCD were as follows: First, the respondents who didn't know that yellow fever is reporting NCD were 11.0% of clinic, 10.5% of hospital. 5.0% of general hospital. 11.8% of tertiary hospital. and in case of hepatitis B, were 26.9% of clinic, 35.2% of hospital. 35.0% of general hospital. 23.5% of tertiary hospital. Second, The rate of physicians' knowledge on penalties of not reporting the NCD by their medical institution were 35.2% of clinic, 45.7% of hospital. 36.7% of general hospital. 62.7% of tertiary hospital. Third, among the no-reporting physicians in whole, the major reason of not reporting NCD were uncertainty of diagnosis(78.9%), no need to report(46.4%), no adequate actions from PHC(29.1%), no knowledge of the cases being notifiable ones in the order of their frequencies(30.4%), meddling from PHC(29.1%), concerning of patient's privacy(26.3%). 2. To analyze the characteristics related to the physicians' behaviors to report NCD, univariate and multiple logistic regression analyses were applied to the variables related to physician, 4 medical facility, PHC, and reporting system. The result were as follows: First, the result of the univariate analysis on physicians' attitude to report NCD and characteristics related to reporting in odds ratio was in the case of hospital. 3.4 times higher positive responses on physicians' attitude to report NCD came up as compared to the clinic. Second, the result of the univariate analysis on physicians' action of reporting NCD and characteristics related to reporting by the classification of medical institutions showed that the odds ratio of hospital was 2.3 times, the odds ratio of general hospital was 2.0 times, the odds ratio of tertiary was 6.8 times significantly higher than clinic. And the medical institution with significantly higher positive attitudes rate by multiple logistic regression analysis was hospital that rated 2.5 times significantly higher than clinic. Also in the PHC related characteristics of reporting, the rate of action in reporting NCD was significantly higher in medical institution that were endowed with the good condition of reporting. In multiple logistic regression analysis, the medical institution that has a good conditions of reporting showed a significantly higher positive rate on the action of reporting than the others.

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Investigation on Perceptions, Attitudes, and Contributing Factors to Spontaneous Adverse Drug Reaction Reporting among Community Pharmacists: Results from a Web-based Survey (지역 약사의 자발적 부작용 보고에 대한 인식 및 태도와 영향요인 조사: 설문조사 결과를 중심으로)

  • Lee, Mo-Se;Choi, Ah-Hyung;Jang, Bo-Hyun;Kim, Na-Young;Lee, Jung-Min;Shin, Ju-Young;Jeon, Ha-Lim
    • Korean Journal of Clinical Pharmacy
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    • v.29 no.2
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    • pp.125-132
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    • 2019
  • Objective: To examine the perceptions and attitudes toward spontaneous adverse drug reaction (ADR) reporting system among community pharmacists and identify factors that influence reporting, by implementing a survey. Methods: A structured questionnaire was developed and distributed online. Request for the survey was posted on the website of pharmacy's billing program, and the survey was conducted for 8 days. We collected the participants' response on their work environment, experience of ADR reporting, and their perception and attitude on the reporting system. Multivariate logistic regression was used to evaluate factors influencing ADR reporting. Results: A total of 382 pharmacists participated in the survey. Significant contributing factors for reporting level were age (odds ratio [OR], 0.90; 95% confidence interval [CI], 0.84-0.96), knowledge of reporting method (OR, 53.56; 95% CI, 9.10-315.41), installation of reporting program (OR, 31.92; 95% CI, 4.16-244.75), and encouragement from the Korean pharmaceutical association (OR, 4.13; 95% CI, 1.11-15.35). Regarding the attitude toward spontaneous ADR reporting system, 'lack of time for reporting' (OR, 0.29; 95% CI, 0.15-0.53) and 'complexity of reporting procedure' (OR, 0.51; 95% CI, 0.31-0.84), were associated with a low likelihood of reporting. Conclusion: Our results indicated that the knowledge of ADR reporting method, installation of the reporting program, and encouragement from the Korean Pharmaceutical Association contribute to active reporting. It is necessary to simplify the reporting method, make the ADR reporting program user-friendly, and provide educational interventions to increase participation in spontaneous reporting by the community pharmacists.

The Effectiveness of Error Reporting Promoting Strategy on Nurse's Attitude, Patient Safety Culture, Intention to Report and Reporting Rate (오류보고 촉진전략이 간호사의 오류보고에 대한 태도, 환자안전문화, 오류보고의도 및 보고율에 미치는 효과)

  • Kim, Myoung-Soo
    • Journal of Korean Academy of Nursing
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    • v.40 no.2
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    • pp.172-181
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    • 2010
  • Purpose: The purpose of this study was to examine the impact of strategies to promote reporting of errors on nurses' attitude to reporting errors, organizational culture related to patient safety, intention to report and reporting rate in hospital nurses. Methods: A nonequivalent control group non-synchronized design was used for this study. The program was developed and then administered to the experimental group for 12 weeks. Data were analyzed using descriptive analysis, $\chi^2$-test, t-test, and ANCOVA with the SPSS 12.0 program. Results: After the intervention, the experimental group showed significantly higher scores for nurses' attitude to reporting errors (experimental: 20.73 vs control: 20.52, F=5.483, p=.021) and reporting rate (experimental: 3.40 vs control: 1.33, F=1998.083, p<.001). There was no significant difference in some categories for organizational culture and intention to report. Conclusion: The study findings indicate that strategies that promote reporting of errors play an important role in producing positive attitudes to reporting errors and improving behavior of reporting. Further advanced strategies for reporting errors that can lead to improved patient safety should be developed and applied in a broad range of hospitals.

Attitude and Knowledge of Community Pharmacists to Adverse Drug Reaction Reporting (약물유해반응 보고에 대한 개국약국 약사들의 태도 및 지식에 관한 연구)

  • Kim, Hyun-Ah
    • Korean Journal of Clinical Pharmacy
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    • v.19 no.2
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    • pp.159-166
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    • 2009
  • The purpose of this study was to evaluate the attitude and knowledge of community pharmacists to spontaneous adverse drug reaction (ADR) reporting. A survey was conducted in 103 community pharmacists in Seoul and Kyung-Gi Province from September to October, 2009. Almost half (53, 51.5%) and three-fourths (79, 76.7%) of respondents knew they could participate in ADR reporting in the Regional Pharmacovigilance Center (RPC) or Korean Food and Drug Administration (KFDA). However, only three of them have reported an ADR to the RPC and none of them have reported to KFDA. A majority of the respondents (96, 93.2%) felt that ADR reporting was a professional obligation for pharmacists. The purpose of an ADR reporting was incorrectly identified by most pharmacists. ADR reporting was encouraged if the reaction was serious and a new product. The most frequently mentioned barriers to reporting were: uncertainty concerning the causal relationship (86.3%) and not knowing how to report an ADR (83.2%). Only 19 (18.4%) respondents had received education on how to report ADR. Education was the most recognized method of improving ADR reporting. This study showed the knowledge of ADR reporting among community pharmacists is inadequate. Education and training should be reinforced in order to improve ADR reporting by community pharmacists.

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Perception of child abuse and attitudes towards mandatory reporting among 119 emergency medical technicians (119구급대원의 아동학대 인식 및 신고의무태도에 관한 연구)

  • Kim, Tae-Hyun;Cho, Keun-Ja
    • The Korean Journal of Emergency Medical Services
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    • v.23 no.2
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    • pp.43-59
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    • 2019
  • Purpose: The purpose of this study was to assess 119 emergency medical technicians' perception of child abuse, attitudes towards mandatory reporting, and perceptions of mandatory reporting system, and to promote early reporting. Methods: The questionnaire was filled out by one hundred ninety 119 EMTs with paramedic or nurse licenses. The questionnaire consisted of 53 items with responses based on a five-point scale. Data were collected from July 10 to July 31, 2018, and were analyzed using IBM SPSS version 24.0 software. Results: The average score for 119 EMT's perception of child abuse was 3.76. The average score for positive attitude towards mandatory reporting was 3.63, and the average score for negative attitude towards mandatory reporting was 2.63. The average score for perceptions of the mandatory reporting system was 3.50. There was a significant positive correlation between perception of child abuse and positive attitude towards mandatory reporting (r=.244, p=.001), between perception of child abuse and perceptions of the mandatory reporting system (r=.209, p=.004), and between positive attitude towards mandatory reporting and perceptions of mandatory reporting system (r=.336, p=.000). Conclusion: Systemic educational programs for 119 EMTs on perception of child abuse and reporting are needed. It is very important to establish institutional strategies such as the use of checklist for suspicion of child abuse, procedural simplicity after reporting, and protection of reporter information.

Optimal Design of Reporting Cell Location Management System using Simulated annealing System (시뮬레이티드어닐링을 이용한 리포팅셀 위치관리시스템 최적 설계)

  • Kim, Sung-Soo;Moon, Jae-Ki
    • Journal of Industrial Technology
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    • v.28 no.B
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    • pp.9-14
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    • 2008
  • In the Reporting Cell Location Management (RCLM) system, a subset of cells in the network is designated as the reporting cells. Each mobile terminal performs location update only when it enters one of these reporting cells. When a call arrives, the paging is confined to the reporting cell the user last reported and the neighboring bounded non-reporting cells. Frequent location update may result in degradation of quality of service due to interference. Miss on the location of a mobile terminal will necessitate a search operation on the network when a call comes in. We must decide the number of reporting cells and which cell should be reporting cell to balance the registration (location update) and search (paging) operations to minimize the cost of RCLM system. This paper proposes a simulated annealing (SA) for optimization of RCLM system.

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Cooperative Spectrum Sensing for Cognitive Radio Networks with Limited Reporting

  • So, Jaewoo
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.8
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    • pp.2755-2773
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    • 2015
  • Cooperative spectrum sensing increases the detection performance in a cognitive radio network, based on the number of sensing nodes. However, as the number of sensing nodes increases, the reporting overhead linearly increases. This paper proposes two kinds of cooperative spectrum sensing with limited reporting in a centralized cognitive radio network, a soft combination with threshold-based reporting (SC-TR) and a soft combination with contention-based reporting (SC-CR). In the proposed SC-TR scheme, each sensing node reports its sensing result to the fusion center through its own reporting channel only if the observed energy value is higher than a decision threshold. In the proposed SC-CR scheme, sensing nodes compete to report their sensing results via shared reporting channels. The simulation results show that the proposed schemes significantly reduce the reporting overhead without sacrificing the detection performance too much.