• 지역사회간호학회지
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• 제15권4호
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• pp.566-576
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• 2004

Purpose: The study was to determine variables related to the depressive impact of emotional labor among workers. Method: 443 respondents were surveyed through the NIOSH generic job stress questionnaire from December 1st through December 30th, 1999. Results: 1. Employment type and job insecurity showed a significant relationship with developing depression, load and role ambiguity. 5. Intervention programs and effective communication networks are needed to help workers cope with their job stress in a positive manner. Conclusions: First, given the correlation between the frequency of avoiding tactics and depression levels, an intervention program is needed to help workers cope with their job stress in a positive manner, Lastly, because role ambiguity was one of the main causes of depression among workers who perform emotional labor, establishing an effective communication network is important to make communication flow within the workplace clear and open.

• 대한족부족관절학회지
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• 제20권4호
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• pp.192-195
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• 2016

Diffuse pigmented villonodular synovitis (PVNS) involving ankle joint needs complete mass excision and total synovectomy to reduce recurrence rate, while surrounding ligaments can be easily damaged. So the concurrent ligament reconstruction should be considered for post-excisional instability in subtalar joint as well as lateral ankle joint. We describe our experience in the management of a diffuse type PVNS, invades lateral talocrural joint extended to subtalar joint and introduce a new technique of all-in-one reconstruction for anterior talofibular,calcaneofibular and cervical ligament. Our new reconstruction technique applying modified Chrisman and Snook technique is useful in stabilization for deficiencies of the ligament complexafter PVNS excisionat lateral ankle and subtalar joint.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 추계학술대회
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• pp.430-432
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• 2015

80/128-비트의 마스터키를 지원하는 초경량 블록암호 PRESENT-80/128의 하드웨어 구현에 대해 기술한다. PRESENT 알고리듬은 SPN (substitution and permutation network)을 기반으로 하며 31번의 라운드 변환을 갖는다. 64-비트 데이터 패스를 갖는 단일 라운드 변환 회로를 이용하여 31번의 라운드가 반복처리 되도록 하였으며, 암호화/복호화 회로가 공유되도록 설계하였다. Verilog HDL로 설계된 PRESENT 프로세서를 Virtex5 XC5VSX-95T FPGA로 구현하여 정상 동작함을 확인하였다. 최대 275 Mhz 클록으로 동작하여 550 Mbps의 성능을 갖는 것으로 예측되었다.

• 한국전자통신학회논문지
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• 제7권6호
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• pp.1545-1553
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• 2012

다기업간 경쟁의 격화, 저성장세의 지속, 고객욕구의 다양화 등 최근의 급격한 마케팅환경 변화는 기업들로 하여금 보다 강력한 마케팅 마케팅수단인 인적판매(personal selling)에 주목하게 하고 있다. 그것은 영업사원의 영업성과는 성격상 기업의 매출로 바로 연결되기 때문이다. 따라서 영업사원의 영업성과(salespeople's sales performance)와 관련된 인과관계를 밝히고 영업사원의 영업성과를 높이는데 어떠한 요인이 중요한 영향을 미치는가를 파악하는 것은 마케팅연구자와 영업관리자들에게 있어 매우 흥미로운 관심사가 되어 왔고 많은 실증적 연구들이 수행되어 왔다. 본 연구에서는 이러한 문제점에 대해 의미있는 방향을 제시하고자 영업사원의 영업성과에 영향을 미치는 선행요인들을 파악하여 성과와의 구조적 관계를 실증분석하고자 하였다.

• Molecules and Cells
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• 제41권7호
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• pp.665-675
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• 2018

Rice is a facultative short-day (SD) plant in which flowering is induced under SD conditions or by other environmental factors and internal genetic programs. Overexpression of Histone Deacetylase 701 (HDT701) accelerates flowering in hybrid rice. In this study, mutants defective in HDT701 flowered late under both SD and long-day conditions. Expression levels of florigens Heading date 3a (Hd3a) and Rice Flowering Locus T1 (RFT1), and their immediate upstream floral activator Early heading date 1 (Ehd1), were significantly decreased in the hdt701 mutants, indicating that HDT701 functions upstream of Ehd1 in controlling flowering time. Transcript levels of OsINDETERMINATE SPIKELET 1 (OsIDS1), an upstream repressor of Ehd1, were significantly increased in the mutants while those of OsGI and Hd1 were reduced. Chromatin-immunoprecipitation assays revealed that HDT701 directly binds to the promoter region of OsIDS1. These results suggest that HDT701 induces flowering by suppressing OsIDS1.

• 한국전자파학회논문지
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• 제23권7호
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• pp.848-851
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• 2012

많은 레이다 시스템들이 주파수 밴드를 공유하여 동시에 운용될 때, 레이다 시스템 간 간섭은 불가피하게 발생한다. 간섭이 레이다 성능을 저하시킬 수 있기 때문에 간섭의 억제는 레이다 시스템에서 중요한 문제이다. 본 논문에서 STFT와 적응형 대역 저지 필터를 이용하여 간섭을 탐지하고 제거하는 방법을 제안하였다. 실제 FMCW 레이다를 이용하여 제안된 방법의 성능을 검증하였다.

• 한국전자파학회논문지
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• 제23권8호
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• pp.1014-1017
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• 2012

본 논문에서는 고해상도 SAR(Synthetic Aperture Radar) 영상 획득을 위해 방위각 방향 해상도를 향상시키기 위한 방법을 소개하였다. SAR 영상 획득을 위해 ${\omega}-k$(omega-k) 알고리즘을 이용하였으며, 2차원 주파수 영역에서 방위각 방향으로 AR(Auto-Regressive) 방법을 이용한 외삽을 이용하여 해상도를 향상시켰다. AR 방법은 선형 예측(linear prediction) 모델을 기반으로 한 외삽 기법이다. AR 방법을 이용한 외삽 기법 중에서 Burg 알고리즘을 이용하여 예측 차수(prediction order)와 표적의 거리에 따른 성능 비교 결과를 보여 준다.

• 한국세라믹학회지
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• 제52권2호
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• pp.123-127
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• 2015

Soda-lime silicate (SLS) glass was strengthened by ion exchange for application of thin and lightweight bulletproof windows. The optimal conditions for ion exchanged SLS glass (thickness of 3 and 10 mm) at $480^{\circ}C$ were 10 and 17 min, respectively. The Vickers hardness values of the strengthened SLS glass samples with thicknesses of 3 and 10 mm were $5.9{\pm}0.22$ and $6.7{\pm}0.17GPa$, respectively, which values were about 22% higher than those of parent SLS glass. By laminating a multilayer defense film and polycarbonate sheet with ion exchanged SLS glass, we were able to make a thin and lightweight bulletproof window (24.25 mm, 4.57 kg, $50.06kg/m^2$, $V_{50}$ 901.8 m/s). As a result, the thickness of the bulletproof window was decreased by about 39% from 40 to 24.25 mm. The light transmittance in the visible range satisfied the standard (over 76%) for bulletproof windows.

• Genomics & Informatics
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• 제8권3호
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• pp.101-102
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• 2010

During the last decade, large community cohorts have been established by the Korea National Institutes of Health (KNIH), and enormous epidemiological and clinical data have been accumulated. Using these information and samples in the cohorts, KNIH set out to do a large-scale genome-wide association study (GWAS) in 2007, and the Korea Association REsource (KARE) consortium was launched to analyze the data to identify the underlying genetic risk factors of diseases and diverse health indexes, such as blood pressure, obesity, bone density, and blood biochemical traits. The consortium consisted of 6 research divisions, formed by 25 principal investigators in 19 organizations, including 18 universities, 2 institutes, and 1 company. Each division focused on one of the following subjects: the identification of genetic factors, the statistical analysis of gene-gene interactions, the genetic epidemiology of gene-environment interactions, copy number variation, the bioinformatics related to a GWAS, and a GWAS of nutrigenomics. In this special issue, the study results of the KARE consortium are provided as 9 articles. We hope that this special issue might encourage the genomics community to share data and scientists, including clinicians, to analyze the valuable Korean data of KARE.

• 한국군사과학기술학회지
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• 제15권6호
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• pp.754-760
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• 2012

To improve the efficiency and economics of national defence, the needs for defence M&S systems are greatly increased, but the lack of interoperability and reusability lowers the level of reliability in the existing simulations models. Recently, many research activities have been performed and some conceptual models, such as CMMS, DCMF, and KAMA, were introduced. However, these models don't support the whole process of defence M&S system development nor provide integrated domain knowledge and up-to-date data. In this paper, we analyzed the analysts' guidances and doctrines, which are the basic ingredients for the simulation system development, and proposed a systematic structure for all the defence M&S stakeholders to share the standardized domain knowledge, modeling algorithm and data. This will be a logical bridge between Mission Space and Simulation Space, and provide substantial data sets to build simulation systems.