• 한국산학기술학회논문지
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• 제19권4호
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• pp.221-228
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• 2018

본 연구는 상급초보 간호사의 재직의도에 영향하는 요인을 파악하기 위해 시도된 서술적 조사연구이다. 자료수집기간은 2017. 5. 01~6. 30까지이며, D시와 C지역 및 K지역에 소재한 종합병원에 근무하고 있는 병원 경력 2~3년차인 상급초보간호사 150명을 대상으로 구조화된 설문지를 이용하여 자기기입 하도록 설문조사하였다. 수집된 자료는 IBM SPSS/WIN 20.0을 이용하여 서술통계, t-test, ANOVA, Pearson 상관관계와 다중회귀분석을 구하여 분석하였다. 연구대상자의 자아탄력성은 3.34점(${\pm}0.53$), 소명의식은 2.28점(${\pm}0.44$), 팀워크역량은 3.88점(${\pm}0.58$), 간호조직문화는 3.36점(${\pm}0.42$)으로 중위수보다 높았으며, 재직의도는 5.27점(${\pm}1.38$)으로 중위수보다 높았다. 재직의도와 자아탄력성(r=.211, p<.05), 소명의식(r=.338, p<.001), 팀워크역량(r=.284, p<.001), 간호조직문화(r=.215, p<.01)는 양의 상관관계가 있었다. 회귀분석 결과, 소명의식이 재직의도에 대해 11.4%(${\beta}=.284$, p<.001)의 설명력이 있었으며, 다음으로 팀워크역량이 4.2%(${\beta}=.212$, p<.001)로서 이 변수들은 재직의도를 총 15.6% 설명하였다. 결론적으로 상급초보 간호사의 재직의도를 향상시키기 위해서는 소명의식과 팀워크역량 강화가 필요함을 파악하였으며, 특히 소명의식 중 '친사회적지향'과 팀워크역량 중 '상호협력'을 강화할 다양한 프로그램 개발 및 실행전략이 요구되어진다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.1533-1539
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• 2000

In this paper, we propose a design method using Taguchi method and a neural network. Using this method, we can design a dual-stage actuator having the required tracking/focusing properties in real time. Also, as an application of this method, a proposed dual-stage pick-up actuator having the required properties was designed. The seek time of this designed actuator is less than 13 msec by a time optimal technique. Simulation results show that this method can potentially be implemented in all the dual-stage actuators.

• 한국미생물·생명공학회지
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• 제6권3호
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• pp.109-113
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• 1978

효소에 의한 우유의 응고과정은 효소적인 단계와 비효소적인 단계의 두 가지로 구성되어 있다는 사실이 확인되었다. 효소적인 단계가 끝나는 점을 시험관속에서 반응을 시킨 다음 그 시험관을 5도의 경사까지 기울었을 때 우유가 시험관 벽을 타고 흐를수 있는 거리를 가지고 측정하였다. 효소적인 단계에 소요되는 반응시간을 측정하므로서 응유효소의 역가를 평가하는 새로운 방법이 제시되었다.

• Journal of Advanced Marine Engineering and Technology
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• 제27권7호
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• pp.862-871
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• 2003

In this paper, we addressed a modeling for the magnetic levitation stage. This planar magnetic levitator employs four permanent magnet liner motors. Each motor generates vertical force for suspension against gravity, as well as horizontal force for propulsion. Therefore. this stage can generate six degrees of freedom motion by the combination of forces. We derived a mechanical dynamics equation using Lagrangian method and electromechanical dynamics equation by using Co-energy method. Based on the derived dynamics, we can analyze the stage motion that is subject to the input currents and forces.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 A
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• pp.582-584
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• 1996

A new single stage AC/DC converter with a high power factor is proposed. The proposed converter gives good power factor correction, low current harmonic distortions, and tight output regulations. This converter also has an high efficiency by employing Active-clamp method and synchronous rectifiers. To verify performances of the proposed converter, 90W-converter is designed. This prototype meets the IEC555-2 requirements satisfactorily with nearly unity power factor.

• 디지털산업정보학회논문지
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• 제16권1호
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• pp.67-78
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• 2020

Typical security solutions such as intrusion detection system are not suitable for detecting advanced persistent attack(APT), because they cannot draw the big picture from trivial events of security solutions. Researches on techniques for detecting multiple stage attacks by analyzing the correlations between security events or alerts are being actively conducted in academic field. However, these studies still use events from existing security system, and there is insufficient research on the structure of the entire security system suitable for advanced persistent attacks. In this paper, we propose an attack path and intention recognition system suitable for multiple stage attacks like advanced persistent attack detection. The proposed system defines the trace format and overall structure of the system that detects APT attacks based on the correlation and behavior analysis, and is designed with a structure of detection system using deep learning and big data technology, etc.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 하계학술대회 논문집
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• pp.238-240
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• 2007

A new ZVZCS Single-Stage Power-Factor-Correction(PFC) AC/DC converter with boost PFC cell is integrated with voltage doubler rectified asymmetrical half-bridge(VDRAHB) is proposed in this paper. The proposed converter features good power factor correction, low current harmonic distortions, tight output regulations and low voltage of link capacitor. An 85W prototype was implemented to show that it meets the harmonic requirements and standards satisfactorily with nearly unity power factor and high efficiency over universal input.

• Archives of Reconstructive Microsurgery
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• 제21권1호
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• pp.68-75
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• 2012

Purpose: The purpose of this study was to evaluate the clinical results of the 4+5th extensor compartmental artery pedicled vascularized bone graft in advanced Lichtman stage III Kienbock's disease. Materials and Methods: Eight patients with advanced Lichtman stage III Kienbock's disease who underwent the 4+5th extensor compartmental artery pedicled vascularized bone graft and followed up more than 1 year were analyzed retrospectively. There were 3 men and 5 women. The mean age was 43.6 years old. Two patients were Lichtman stage IIIA and six patients were IIIB. The clinical outcomes were evaluated with radiocarpal joint pain, range of motion, grip strength, carpal-height ratio, radioscaphoid angle, return to daily living activity and/or work. The mean follow up period was 38.5 months (range from 12 to 86 months). Results: On last follow up, the pain was disappeared in 6 patients, and mild occasional pain was remained in 2 patients. Mean radiocarpal joint flexion and extension were 55 degrees and 60 degrees, 87% and 88% of the normal side, respectively. The carpal-height ratio was maintained or improved in 6 patients and slightly decreased in 2 patients. Radioscaphoid angle were improved or maintained in 7 patients. Mean grip strength was 67 lb, 93% of the normal side. All 8 patients returned to daily living activities and/or their previous works. Conclusion: The 4+5th extensor compartmental artery pedicled vascularized bone graft prevented the progression of disease and provided clinical improvement even in advanced Lichtman stage III Kienbock's disease.

• Asian Pacific Journal of Cancer Prevention
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• 제16권13호
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• pp.5397-5400
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• 2015

Background: The aim of this study was to investigate the predictive value of white blood cells (WBC), the neutrophil to lymphocyte ratio (NLR), platelet indices including mean platelet volume (MPV), platelet distribution width (PDW), platelet crit (PCT) and platelet to lymphocyte ratio (PLR) in discrimination between benign and malign endometrial lesions, and early and advanced stage endometrial adenocarcinomas. Materials and Methods: Data for 105 patients undergoing total abdominal or vaginal hysterectomy for benign uterine diseases and 114 patients surgically staged for endometrium adenocarcinoma at Ondokuz Mayis University, Department of Gynecology and Obstetrics, between 2008 and 2014, were collected. Parameters were preoperative and postoperative complete blood counts in the week prior to surgery with differentials including WBC, platelet count, platelet indices (MPV, PCT, PDW), NLR and PLR. Pathologic evaluations for both benign and malign endometrium lesions, grade of endometrium adenocarcinoma, tumor stage, presence of lymphovascular space invasion (LVI) were retrospectively analyzed. Results: Regarding definitive factors in discriminating patients with endometrium cancer from those with benign diseases, MPV was significantly increased in the malign group whereas there was a significant decrease in the PDW value compared to the benign group. The best cut-off value in differentiation of the benign and malign groups, malign cases were found to increase over the value of 7.54 for MPV, and under 37.8 for PDW. When definitive factors in discrimination of early stage endometrium cancer from advanced stage disease and LVI in the malign group were evaluated according to the ROC analysis, no significant relation was detected between blood parameters and the stage and the LVI of the disease. Conclusions: MPV and PDW may have predictive value in the discrimination of benign and malign endometrium diseases. Nevertheless, since there have been few reports on this topic, further large-scale prospective studies are necessary.

• Journal of Gastric Cancer
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• 제23권4호
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• pp.598-608
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• 2023

Purpose: Lymph node (LN) metastasis is a crucial factor in the prognosis of patients with gastric cancer (GC) and is known to occur more frequently in cases with an advanced T stage. This study aimed to analyze the survival data of patients with advanced LN metastasis in T1 GC. Materials and Methods: From January 2008 to June 2018, 677 patients with pathological stage II GC who underwent radical gastrectomy were divided into an early GC group (EG: T1N2 and T1N3a, n=103) and an advanced GC (AGC) group (AG: T2N1, T2N2, T3N0, T3N1, and T4aN0, n=574). Short- and long-term survival rates were compared between the 2 groups. Results: A total of 80.6% (n=83) of the patients in the EG group and 52.8% (n=303) in the AG group had stage IIA AGC. The extent of LN dissection, number of retrieved LNs, and short-term morbidity and mortality rates did not differ between the 2 groups. The 5-year relapse-free survival (RFS) of all patients was 87.8% and the overall survival was 84.0%. RFS was lower in the EG group than in the AG group (82.2% vs. 88.7%, P=0.047). This difference was more pronounced among patients with stage IIA (82.4% vs. 92.9%, P=0.003). Conclusions: T1 GC with multiple LN metastases seems to have a worse prognosis compared to tumors with higher T-stages at the same level. Adjuvant chemotherapy is highly recommended for these patients, and future staging systems may require upstaging T1N2-stage tumors.