• 융합정보논문지
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• 제11권3호
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• pp.46-53
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• 2021

본 연구는 주간근무 및 교대근무 여성 근로자의 일반적 요인 및 여성건강관련 요인들의 차이를 비교하는 것을 목적으로 한다. 보건복지부 질병관리본부에서 실시한 제7기 2차년도 국민건강영양조사 자료를 기초로 하였으며 설문 조사에 참여한 조사자는 모두 10,430명이었다. 그 중 1,995명 근로자의 건강관련 변수와 건강관련 삶의 질 차이를 분석하였다. 여성 근로자의 연령, 결혼여부, 교육수준, 종사상지위, 출산경험은 주간근무 근로자와 교대근무 근로자 간의 유의한 차이를 나타냈다. 반면 소득이나 주관적 건강인식, 스트레스 인지, 우울경험, 초경연령, 폐경연령, 수유기간과 건강관련 삶의 질은 유의한 차이를 나타내지 못하였다. 교대근무는 산업의 발전과 탄력 근로제를 위하여 불가피하게 시행되고 있는 실정이다. 따라서 교대근무로 인한 부작용을 줄이기 위해서는 근로자 개인뿐만 아니라 사회적, 국가적인 관심과 대책이 요구된다.

• 임상간호연구
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• 제16권1호
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• pp.95-105
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• 2010

Purpose: The purpose of this study was to examine the difference between direct and indirect nursing activity times according to the grade of nursing management fee. Methods: The subjects of this study were 324 working nurses at the time of 3rd grade and 319 working nurses at the 2nd grade of nursing management fee in one university hospital. Nursing activity time was measured in April and May, and in September and October of 2008 for comparison. The data were analyzed by SPSS win using frequency and t-test. Results: Direct nursing care activity time per one patient was significantly higher at 2nd grade than 3rd grade in day shift (t=-2.55, p=.012). Direct nursing care workload per one nurse was significantly lower at 2nd grade than 3rd grade in evening shift (t=2.21, p=.030), whereas indirect nursing care workload was lower at 2nd level in night shift (t=2.43 p=.016). Conclusion: The findings from this study showed that higher nurse-to-patient ratio can provide greater amount of direct nursing care activity for the patient. Also, it decreased workload of nurses. The higher nurse-to-patient ratio will be beneficial for promoting quality of nursing care as well as decreasing nurse's heavy workload.

• International Journal of Computer Science & Network Security
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• 제23권6호
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• pp.27-34
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• 2023

This paper proposed an Inter-Carrier-Interference (ICI) Canceling Orthogonal Frequency Division Multiplexing (OFDM) receiver for 5G mobile system to support 500 km/h linear motor high speed terrestrial transportation service. A receiver in such high-speed train sees the transmission channel which is composed of multiple Doppler-shifted propagation paths. Then, a loss of sub-carrier orthogonality due to Doppler-spread channels causes ICI. The ICI Canceler is realized by the following three steps. First, using the Demodulation Reference Symbol (DMRS) pilot signals, it analyzes three parameters such as attenuation, relative delay, and Doppler-shift of each multi-path component. Secondly, based on the sets of three parameters, Channel Transfer Function (CTF) of sender sub-carrier number 𝒏 to receiver sub-carrier number 𝒍 is generated. In case of 𝒏≠𝒍, the CTF corresponds to ICI factor. Thirdly, since ICI factor is obtained, by applying ICI reverse operation by Multi-Tap Equalizer, ICI canceling can be realized. ICI canceling performance has been simulated assuming severe channel condition such as 500 km/h, 2 path reverse Doppler Shift for QPSK, 16QAM, 64QAM and 256QAM modulations. In particular, for modulation schemes below 16QAM, we confirmed that the difference between BER in a 2 path reverse Doppler shift environment and stationary environment at a moving speed of 500 km/h was very small when the number of taps in the multi-tap equalizer was set to 31 taps or more. We also confirmed that the BER performance in high-speed mobile communications for multi-level modulation schemes above 64QAM is dramatically improved by the use of a multi-tap equalizer.

• Archives of Pharmacal Research
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• 제20권5호
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• pp.459-464
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• 1997

The human liver cDNA clone UDPGTh2, encoding a liver UDP-glucuronosyltransferase (UDPGT) was isolated from a .gamma. gt 11 cDNA library by hybridization to mouse transferase cDNA clone, UDPGTm1. UDPGTh2 encoded a 529 amino acid protein with an amino terminus membrane-insertion signal peptide and a carboxyl terminus membrane-spanning region. There were three potential asparagine-linked glycosylation sites at residues 67, 68, and 315. In order to obtain UDPGTh2 protein encoded from cloned human liver UDP-glucuronosyltransferase cDNA, the clone was inserted into the pSVL vector (pUDPGTh2) and expressed in COS 1 cells. The presence of a transferase with Mr-52,000 in transfected cells cultured in the presence of $[^{35}S]$ methionine was shown by immunocomplexed products with goat antimouse transferase IgG and protein A-Sepharose and analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and autoradiography. The expressed UDPGT was a glycoprotein as indicated by electrophoretic mobility shift in Mr-3,000-4,000 when expressed in the presence of tunicamycin. The extent of glycosylation was difficult to assess, although one could assume that glycosyl structures incorporated at the level of endoplasmic reticulum were always the core oligosaccharides. Thus, it is likely that at least two moieties inserted can account for the shift of Mr-3,000-4,000. This study demonstrates the cDNA and deduced amino acid sequence of human liver UDP-glucuronosyltransferase cDNA, UDPGTh2.

• 대한기계학회논문집B
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• 제21권3호
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• pp.427-435
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• 1997

Conditional sampling techniques are utilized to investigate the relation between the wall skin-friction and stream wise velocity fluctuations in a turbulent boundary layer. Conditionally averaged results using a peak detection and the VITA (variable-interval time-averaging) technique show that a high skin friction is associated with high frequency components of the wall skin-friction fluctuations. The conditionally averaged wall skin-friction fluctuations obtained by using the VITA technique have a positively-skewed characteristics compared with the conditionally averaged stream wise velocity fluctuations. It is confirmed that there exists a phase shift between the wall skin-friction and stream wise velocity fluctuations, which was also found from the long-time averaged space-time correlations. The amount of phase shift between the wall skin-friction and stream wise velocity fluctuations is the same as that from the long-time averaged space-time correlations and does not change despite the variation of the detection threshold.

• 경영과학
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• 제34권1호
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• pp.15-25
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• 2017

We evaluated industry growth and employment effects of every possible pairs of 22 manufacturing sectors and 16 regions (i.e, 352 region-sectors). We used annual data of manufacturing sectors from 2008 to 2014 for the evaluation. The evaluation comprises of two steps; We first find several region-sectors that outperform others with respect to the effects of industry growth and employment, which are measured by location quotient analysis, shift share method, employment to GDP ratio and employment elasticity. In addition, cross-efficiency analysis follows to classify region-sector pairs into two sub-categories : efficient region-sectors that deserve to hold the current level of investments and inefficient region-sectors where we should consider efficiency improvements. To examine the efficiency, R&D investment, employment size, and capital investment were used as input factors and production volume, added value, changes in employment size, changes in annual salary per capita were used as output factors. For region-sector pairs that have outstanding growth and employment effects but are inefficient, we employed a CCR DEA model and analyzed how much to adjust the values of input and output factors to improve the efficiency scores. The analysis results showed that inefficiency is mainly due to several factors such as R&D investment, changes in employment size and changes in annual salary per capita.

• 대한정형외과스포츠의학회지
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• 제2권1호
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• pp.6-14
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• 2003

전방십자인대재건술의목표는안정된관절과 pivot shift 현상을 제거하고, 반월상 연골을 보호하고, 관절운동범위를 유지하고, 술후슬개-대퇴관절의문제를최소화하도록재활하여수상전의운동수준으로복귀시키는것이다. 그래서전방십자인대 재건술은급성기에수술은피하고, 수술 전에재활치료를통하여관절운동범위와 대퇴사두고근의근력을얻은다음, 환자가육체적으로나정신적으로준비가될때까지수술을연기한다. 수술후재활치료는슬관절의완전신전과closed kinetic chain 운동을강조하며, 수술후정기적인방문으로재활치료를지도해주고장기추시해야하는것이중요하다.

• 지식경영연구
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• 제14권5호
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• pp.55-79
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• 2013

This study primarily focused on the opportunity realization process of a korean venture firm based on university. This research examined the relationship between entrepreneurial intent and organizational learning produced in a sustainable opportunity realization process with technology/market domain shifts. Therefore, this research explores the determinants of sustainable growth of a venture firm at the organizational level and suggests optimal solutions for promoting entrepreneurial intent and opportunity realization for many entrepreneurs. The results showed that CEO's entrepreneurial intent is a key driving factor that can positive impacts on opportunity recognition and organizational learning based on university's expertise. Furthermore, the orientation of a entrepreneur can affect venture's technology/market domain shift through the advanced technological knowledge of university. In conclusion, this research sheds light on the growth of a venture firm based on university suggesting more customized solutions for many entrepreneurs. Implications for the results and the future directions are discussed.

• 전자공학회논문지D
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• 제36D권1호
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• pp.15-21
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• 1999

저위상 변화 감쇄기를 이용한 RF 자동 이등 조정 증폭기 설계 방법을 제시하였다. RF 자동 이등 조정 증폭기를 사용함으로써, 증폭기의 출력 레벨을 일정하게 유지할 수 있으며 그 오차는 0.1dB 이하로 하였다. 이러한 장점 외에도, 임의의 RF 입력전력에 대하여 증폭기의 이득을 고정할 수도 있다. 만약 일정한 이득이 얻어진다면 원하는 혼변조 왜곡(IMD: Inter-modulation Distortion)을 얻는데 좀 더 신뢰성 있는 증폭기를 만들 수 있다.

• 한국통신학회논문지
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• 제24권6A호
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• pp.782-790
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• 1999

본 논문은 slowly 레일리 페이딩에서 기존의 ATCMPSK(Adaptive Trellis-Coded Multiple Phase Shift Keying) 시스템을 트렐리스 코디드(Trellis-Coded) MQAM(Multiple Quadrature Amplitude Modulation)을 적용한 적응화 시스템 모델을 제안하였다. 이 제안한 적응화 시스템 모델은 채널 상태에 따라서 프래크메틱 부호화기를 사용하여 부호율과 변조 레벨을 가변하였다. 컴퓨터 모의 실험에서는 제안한 ATCMQAM(Adaptive Trellis-Coded MQAM)과 기존의 ATCMPSK(Adaptive Trellis-Coded MPSK) 모델에 대한 성능을 평가하였다. 결론적으로, MQAM을 적용한 시스템이 MPSK를 적용한 시스템에 비해 성능이 비슷할 때, 데이터 출력율면에서 보면 SNR이 증가함에 따라 0.5 ∼ 1비트이상 향상되었다. 또한 코딩 이득 (coding gain)도 2 ∼ 5dB정도 얻을 수 있었다.