• Journal of KSNVE
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• v.9 no.6
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• pp.1131-1136
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• 1999

NIC@E is the software developed by authors. The program provides the noise level in outdoors due to various noise source types : construction machines including blast sources, railroad vehicles and automobiles. It operates in the Windows system. In this paper, a highway traffic noise has been evaluated using various types of approach : Ray-tracing method, NIRI method, JAS method. In order to compare the noise estimation performance for various models, a measurement is conducted on a 8 lane express highway at the distance of 25 m and 50 m from the lane. The result shows that the ray tracing and JAS model predict the measured value well within 2dB deviaton. The NIRI model, however, underestimates the highway noise level, as the distance between the source and receiver increases.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10c
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• pp.82-84
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• 2000

하드웨어 기술의 발전으로 서버 시스템의 연산능력은 발전을 거듭하고 있다. 또한 인터넷 사용의 광범위한 발전으로 인한 웹에 대한 폭발적인 사용 증가는 네트워크 서버의 연산 능력에 대한 요구와 더불어 향상된 네트워크 대역폭을 요구하게 되었다. 네트워크 장비의 발전도 진일보하고 있지만, 10Mbps, 100Mbps, 기가비트 이더넷등을 거치는 표준의 변화와 함께 기존의 장비에 대한 전면적인 교체 등으로 성능향상을 위해 많은 비용의 소요를 감수할 수밖에 없는 상황에 처해 있다. 클러스터의 한 예인 Beowulf 프로젝트와 같은 경우에, 기존의 네트워크 인터페이스를 병렬적으로 사용함으로써 큰비용 없이 더 큰 네트워크 대역폭을 얻기 위한 목적으로 이더채널(Channel-bonding)과 같은 기술이 개발되어 사용되기도 하였으나, 어디까지나 클러스터링을 위한 부수적인 기술로써 다소의 성능 향상에 만족하였고 심도있는 연구와 개발은 이루어지지 못하였다. 본 논문에서는 강력한 컴퓨팅 파워를 요구하는 특별한 서버 시스템이 아닌, 일반적으로 큰 네트워크 대역폭만을 요구하는 네트워크 서버에서 기존의 네트워크 인터페이스를 병렬적으로 이용하고, 채널-본딩에 비해 개선된 data distribution algorithm을 제안함으로써 성능의 향상을 꾀하고, 더불어 이러한 기술을 IEEE에서 제정중에 있는 802.3ad Link Aggregation 표준에 적용시키기 위한 기초를 마련하고자 한다.

• Journal of Electrical Engineering and Technology
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• v.12 no.3
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• pp.1286-1291
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• 2017

In this paper, we propose an indoor positioning system that makes use of the attenuation model for IEEE 802.11 Channel State Information (CSI) in order to determine its distance from an Access Point (AP) at a fixed position. With the use of CSI, we can mitigate the problems present in the use of Received Signal Strength Indicator (RSSI) data and increase the accuracy of the estimated mobile device's location. For the experiments we performed, we made use of the Intel 5300 Series Network Interface Card (NIC) in order to receive the channel frequency response. The Intel 5300 NIC differs from its counterparts in that it can obtain not only the RSSI but also the CSI between an access point and a mobile device. We can obtain the signal strengths and phases from subcarriers of a system which in turn means making use of this data in the estimation of a mobile device's position.

• Proceedings of the Korean Fiber Society Conference
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• 1989.06a
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• pp.62-62
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• 1989

• Proceedings of the Korean Fiber Society Conference
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• 1991.06a
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• pp.38-38
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• 1991

• Journal of Korean Academy of Fundamentals of Nursing
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• v.19 no.1
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• pp.109-121
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• 2012

Purpose: This study was conducted to provide background information on nursing interventions to further enhance the quality of nursing practice and related professions, based on those performed for stroke patients. Methods: The analysis was performed in light of 84 researches papers on nursing intervention published between 1990 and 2010, and based on NIC(Nursing Interventions Classification) and NOC(Nursing Outcomes Classification). Results: 1. The quasi-experimental design was used as the most primary form of research design across 69 papers that constitute 82% of the total. 2. The number of nursing intervention methods identified throughout 84 research papers was 144. Based on the NIC that 90(62.5%) of those interventions fell into the physiological basic domain while 53(36.8%) belonged to the behavioral domain. 2) Interventions on activity and exercise management, physical comfort promotion, patient education conducted by class level of NIC were 40(27.78%), 34(23.61%), and 31(21.53%) respectively. 3) Outcomes of mobility, psychological well-being, energy maintenance, health & life quality measured by class of NOC among 317 dependent variables 79(24.92%), 64(20.19%), and 63(19.87%) respectively. Conclusion: Most interventions were classified as belonging to few particular domain types, which triggers needs for the development and application of multidisciplinary intervention methods through a more collective approach.

• Journal of The Korean Astronomical Society
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• v.45 no.5
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• pp.127-138
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• 2012

We explore how wave-particle interactions affect diffusive shock acceleration (DSA) at astrophysical shocks by performing time-dependent kinetic simulations, in which phenomenological models for magnetic field amplification (MFA), Alfv$\acute{e}$nic drift, thermal leakage injection, Bohm-like diffusion, and a free escape boundary are implemented. If the injection fraction of cosmic-ray (CR) particles is ${\xi}$ > $2{\times}10^{-4}$, for the shock parameters relevant for young supernova remnants, DSA is efficient enough to develop a significant shock precursor due to CR feedback, and magnetic field can be amplified up to a factor of 20 via CR streaming instability in the upstream region. If scattering centers drift with Alfv$\acute{e}$n speed in the amplified magnetic field, the CR energy spectrum can be steepened significantly and the acceleration efficiency is reduced. Nonlinear DSA with self-consistent MFA and Alfv$\acute{e}$nic drift predicts that the postshock CR pressure saturates roughly at ~10 % of the shock ram pressure for strong shocks with a sonic Mach number ranging $20{\leq}M_s{\leq}100$. Since the amplified magnetic field follows the flow modification in the precursor, the low energy end of the particle spectrum is softened much more than the high energy end. As a result, the concave curvature in the energy spectra does not disappear entirely even with the help of Alfv$\acute{e}$nic drift. For shocks with a moderate Alfv$\acute{e}$n Mach number ($M_A$ < 10), the accelerated CR spectrum can become as steep as $E^{-2.1}$ - $E^{-2.3}$, which is more consistent with the observed CR spectrum and gamma-ray photon spectrum of several young supernova remnants.

• Korean Journal of Adult Nursing
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• v.13 no.4
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• pp.517-528
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• 2001

목적: 본 연구의 목적은 미국 아이오와 대학에서 개발된 Nursing Interventions Classification (NIC)을 사용하여 신경기계 병동과 정형외과 병동에 근무하는 간호사들이 가장 빈번히 수행하는 간호중재를 파악함으로서 이러한 부서의 간호중재 리스트를 개발하는데 있다. 그리고 확인된 간호중재의 리스트를 미국 간호협회의 핵심 간호중재 목록과 비교함으로써 양국간의 간호중재의 유사성과 차이를 비교함으로써 한국간호의 발전을 도모하는데 있다. 방법: 8개의3차병원 및 종합병원 근무하는 간호사에게 NIC을 번역하여 소개한 뒤 가장 자주 수행하는 간호중재 30개를 선택하게 하였다. 선택된 간호중재는 빈도와 백분율 이용하여 분석하였고 미국의 핵심간호 중재목록과 영역(domain)별, 분류군 (class)별로 비교하였다. 결과: 신경기계 병동은 30개의 간호중재를 정형외과 병동은 34개를 핵심간호중재로 확인하였다. 한국과 미국의 간호중재를 비교해본 결과 신경기계 병동의 간호중재와 미국American Association of Neuroscience Nurses (AANN) 의 핵심간호중재 목록과는 단지 5개의 간호중재가 일치하였지만 정형외과 병동의 간호중재목록은 미국의 National Association of orthopaedic Nurses (NAON) 의 핵심중재목록과 27개의 간호중재가 일치되어 더 많은 유사성을 나타내었다. 두 나라의 간호중재를 영역(domain)별로 비교해보면 한국 간호사의 간호중재는 미국간호단체의 핵심간호 중재 목록보다 신체적 간호에 보다 많은 편중을 보였다. 결론: 한국간호사의 간호중재가 신체적 간호중재에 집중되어 있으므로 환자간호에 보다 전인적인 간호중재가 수행될 수 있도록 노력해야 할 것이다. 그리고 본 연구를 통해 개발된 핵심 간호중재 목록은 병원의 간호정보시스템을 개발하는데 사용될 수 있으며, 간호지식의 확장이나 staffing, 간호 수가화, 그리고 궁극적으로는 간호의 효과성 연구를 자극할 수 있을 것이다.

• Journal of Korean Academy of Nursing
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• v.29 no.4
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• pp.802-816
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• 1999

The purposes of this research were to identify nursing interventions performed by Korean nurses and to compare the interventions performed by nurses working in the oriental medicine hospitals and with those performed by nurses working in the general hospitals. The samples consisted of 144 Korean nurses working in three hospitals, 70 nurses working in the oriental medicine hospitals and 74 nurses working in the general hospitals. The Nursing Interventions Classification (NIC) Use Questionnaire developed by the Iowa Intervention Project team was translated to Korean and verified using the method of back-translation. The questionnaire consists of 433 intervention labels and definition. Thirteen interventions were used at least daily by nurses working in the oriental medicine hospitals, while twenty-one interventions were used at least daily by nurses working in the general hospitals. The most frequently used interventions by nurses working in the oriental medicine hospitals were Documentation, Shift Report Vital Signs Monitoring, Pressure Ulcer Prevention, Positioning, Fall Prevention, Exercise Promotion, Intravenous (IV) Therapy, Pressure Ulcer care, and Bed Rest Care in that crder. For nurses working in the general hospitals the most frequent intervention was Analgesic Administration, followed by the interventions of Medication Administration : Parenteral and Intravenous Therapy (IV) Therapy, Documentation, Intravenous(IV) Insertion, Shift Report, Fall Prevention, Vital Signs Monitoring, Medication Adnninistraction : and, Fluid Monitoring, and Medication Maragement in that order. The interventions performed least often by nurses working in the oriental medicine hospitals were Hemodialysis Therapy and Bleeding Reduction : Antepartum Uterus, while the interventions performed least often by nurses working in the general hospitals were Rape Trauma Treatment and Contact Lens Care. The nurses working in the oriental medicine hospitals performed the interventions in the Physiological : Complex domain significantly more often than the nurses working in the general hospitals, while the nurses working in the general hospitals performed the intervention in the Behavior domain significantly more often than the nurses working in the oriental medicine hospitals. This study suggests that further study will be needed to developed and validate more interventions sensitive to Korean culture.

• Journal of Korean Academic Society of Home Health Care Nursing
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• v.8 no.1
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• pp.25-37
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• 2001

Spinal cord injury patients need rehabilitation after the acute stage. They should be cared for at home to decrease hospitalization. Home care nurses play an important role in making spinal cord injury patients who have physical. and psychosocial problems do their best. For effective care, home care nurses need standardized nursing intervention protocols for spinal cord injury patients, but they are rarely developed. Therefore, this study was conducted to develop home care nursing protocols, based on NIC, that are applicable to spinal cord injury patients at home. Forty home care nursing charts of spinal cord injury patients registered in a home care nursing agency from July 1st, 1994 to August 31st, 1999 in S city were analyzed. Fifteen home care nurses participated in this study as a user validity validation group, The results of this study are as follows. 1. Fifteen nursing diagnoses were classified through the frequency analysis of home care nursing charts and previous literature for 40 spinal cord injury patients: altered urinary elimination, constipation, high risk for impaired skin integrity, chronic pain, impaired skin integrity, impaired social interaction, knowledge deficit, bowel incontinence, high risk for injury, altered role performance, care giver role strain, impaired physical mobility, sexual dysfunction, dysreflexia, and ineffective breathing pattern. 2. Based on validation by experts and user validities, 93 nursing interventions which were above ICV(Index of Content Validity) .80 were chosen. 3. Nursing intervention protocols which showed above ICV .80 were developed.