• 한국조리학회지
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• 제22권4호
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• pp.81-94
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• 2016

본 연구의 목적은 외식관련 전공자의 노동시장 이행에 영향을 미치는 요인에 대한 상대적 중요도를 측정하고자 한다. 이러한 목적을 달성하기 위해 외식관련 전공자의 노동시장 이행에 영향을 미치는 요인들로서 개인배경, 학력, 노동시장 이행 준비노력 요인 등을 계층 2로 설정하였으며, 계층에 있는 요소들에 대한 상대 평가를 통해 각 요소들이 가지는 중요도를 산출해 내는 기법인 계층분석기법을 사용하였다. 분석결과를 살펴보면 다음과 같다. 첫째, 계층 2의 경우 노동시장 이행 준비노력의 상대적 중요도가 가장 높게 나타났다. 반면에, 4년제 대학의 외식관련 전공자의 경우, 학력 요인의 상대적 중요도가 가장 높게 나타났다. 둘째, 계층 3 중 개인배경요인의 경우 성별의 상대적 가중치가 가장 높게 나타났다. 학력 요인의 경우, 대학유형의 상대적 가중치가 가장 높게 나타났다. 노동시장 이행 준비노력 요인의 경우, 재학 중 국외 근로경험과 구직경로의 상대적 가중치가 높게 나타났으며, 직업훈련 경험의 상대적 가중치는 가장 낮게 나타났다. 셋째, 복합 가중치를 분석한 결과를 살펴보면 대학유형의 복합가중치가 가장 높게 나타났다. 향후 연구에서는 외식관련 산업체의 업종과 업태를 보다 세분화하여 영향 요인을 분석하고, 이를 토대로 전공자의 진로분야별 맞춤형 진로지도가 이루어져야 할 것이다.

• EDISON SW 활용 경진대회 논문집
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• 제5회(2016년)
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• pp.373-376
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• 2016

Transition metal dichalcogenides (TMDs) such as $MoS_2$ is the thinnest semiconductor, exhibits promising prospects in the applications of optoelectronics, catalysis and hydrogen storage devices. Uniform and high quality $MoS_2$ is highly desirable in large area for its applications on commercial scale and fundamental research. Many experimental techniques i.e CVD have been developed to successfully synthesis $MoS_2$ on large scale, here in this work atomistic detail to understand the growth mechanism is addressed which was greatly overlooked. Here based on first principles calculation we found that polarity of seeding promter (crystal violet considerd in this work) controls the growth mechanism. It is also found that molybdenum destroys the precursor while sulfur adsorption with precursor is favorable.

• 한국재료학회지
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• 제33권5호
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• pp.222-228
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• 2023

Transition metal oxides formed by a single or heterogeneous combination of transition metal ions and oxygen ions have various types of crystal structures, which can be classified as layered structures and non-layered structures. With non-layered structures, it is difficult to realize a two-dimensional structure using conventional synthesis methods. In this study, we report the synthesis of cobalt oxide into wafer-scale nanosheets using a surfactant-assisted method. A monolayer of ionized surfactant at the water-air interface acts as a flexible template for direct cobalt oxide crystallization below. The nanosheets synthesized on the water surface can be easily transferred to an arbitrary substrate. In addition, the synthesizing morphological and crystal structures of the nanosheets were analyzed according to the reaction temperatures. The electrochemical properties of the synthesized nanosheets were also measured at each temperature. The nanosheets synthesized at 70 ℃ exhibited higher catalytic properties for the oxygen evolution reaction than those synthesized at other temperatures. This work suggests the possibility of changing material performance by adjusting synthesis temperature when synthesizing 2D nanomaterials using a wide range of functional oxides, resulting in improved physical properties.

• Journal of Microbiology and Biotechnology
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• 제15권5호
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• pp.965-970
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• 2005

In our previous study [14], we found that heat-shock exposure did not stimulate the neutral trehalase activity in Sacchromyces cerevisiae KNU5377, but did in ATCC24858. Consequently, the trehalose content in KNU5377 became 2.6 times higher than that in ATCC24858. Because trehalose has been shown to stabilize the structure and function of some macromolecules, the present work was focused to elucidate the relationship between trehalose content of these strains and thermal stabilities of whole cells, through differential scanning calorimetry (DSC), and to predict critical targets calculated from the hyperthermic cell killing rates. These analyses showed that the prominent DSC transition of both strains gave identical $T_m$ (transition temperature) values in exponentially growing cells, and that the $T_m$ values of critical targets was about $3^{\circ}C$ higher in KNU5377 than in ATCC24858. Both heat-shocked KNU5377 and ATCC24858 cells displayed similar shifts in their DSC transition profiles. On the other hand, the $T_m$ value of the critical target of KNU5377 was decreased by $2.1^{\circ}C$, which was still higher than ATCC24858 showing no changes. In view of these results, the intrinsic thermotolerance of KNU5377 did not appear to result from the stability of entire cellular components, but rather possibly from that of particular macromolecules, including critical targets, even though it should be investigated in more details. Although the trehalose levels in heat-shocked cells are significantly different, as described in our previous study [14], the overall pattern of thermal stabilities and their predicted critical targets in two heat-shocked strains seemed to be identical. These data suggest that the trehalose levels examined before and after heat shock of exponentially growing cells are not closely correlated with the stabilities of whole cells and/or critical targets in both yeast strains.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제41회 하계 정기 학술대회 초록집
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• pp.211-211
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• 2011

Nanostructures, with a diversity of shapes, built on substrates have been developed within many research areas. Lithography is one powerful, but complex, technique to make structures at the nanometer scale, such as platinum nanowires for studying CO catalytic reactions [1], or aluminum nanodisks for studying the plasmon effect [2]. In this work, we approach a facile method to construct nanostructures using noble metals on a titania thin film by using self-assembled structures as a pattern. Here, a large-scale silica monolayer is transferred to the titania thin film substrates using a Langmuir-Blodgett trough, followed by the deposition of a thin transition metal layer. Owing to the hexagonal close-packed structure of the silica monolayer, we would obtain a metal nanostructure that includes separated metallic triangles (islands) after removing the patterning silica beads. This nanostructure can be employed to investigate the role of metal-oxide interfaces in CO catalytic reactions by changing the patterning silica particles with different sizes or by replacing the oxide support. The morphology and chemical composition of the structure can be characterized by scanning electron microscopy, atomic force microscopy and X-ray photoelectron spectroscopy. In addition, we modify these islands to a connected island structure by reducing the silica size of the patterning monolayer, which is utilized to generating hot electron flow based on the localized surface plasmon resonance effect of the metal nanostructures.

• 한국의료질향상학회지
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• 제27권1호
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• pp.26-42
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• 2021

Purpose: This study aimed to explore frontline nurses' experience of patient-centered care and understand the factors affecting its implementation in hospitals. Methods: Four focus group interviews were conducted with 30 nurses in two university hospitals. The following theoretical framework of patient-centered care was used: 1) Respect for patients' values, preferences, and expressed needs, 2) Care coordination and integration, 3) Information, communication, and education, 4) Physical comfort, 5) Emotional support and alleviation of fear and anxiety, 6) Involvement of family and friends, 7) Care transition and continuity, and 8) System issues. We performed a directed content analysis. Results: The most frequent patient-centered nursing practices of the hospital nurses were "promoting physical comfort" in inpatient settings and "providing information and communicating" in outpatient settings. The factors influencing patient-centered nursing included the health professionals' mindfulness, work overload and staff shortage, and unreasonable social demands and regulations. Conclusion: A more comprehensive patient-centered nursing practice should be implemented by improving "care transition and continuity," "family/caregiver involvement," and "system building." Health professionals' mindfulness is significant, and organizational supports addressing work overload and staff shortage are needed alongside change in social awareness.

• 노동경제논집
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• 제25권1호
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• pp.47-74
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• 2002

경제위기 직후 실업률의 급상승과 함께 경기변동에 민감한 청년층의 실업률은 15~20%까지 상승하였다. 경기회복에도 불구하고 신규학졸자의 첫 일자리 취업에는 상당한 애로가 존재하고 청년층의 유휴화율은 여전히 심각한 수준이다. 청년층 유휴화의 부정적 효과에도 불구하고 청년층의 학교교육-노동시장 이행과정에 관한 연구는 일천하다. 본 연구는 "한국노동패널" 3차년도(2000년)에 실시한 "청년층 부가조사" 자료를 이용하여 15~29세 청년층이 최종 학교를 마치고 첫 일자리를 취득하는 데 소요되는 미취업 경과기간을 분석한다. 미취업상태가 경과할수록 탈출확률이 낮아지는 부(-)의 경과 기간 의존성이 나타나며, 예상과는 달리, 여성의 탈출확률이 남성보다 높게 나타난다. 학력수준의 탈출확률에 대한 효과는 경제위기 이전에는 유의하지 않게 나타나나 경제위기 이후에는 뚜렷한 것으로 나타난다. 경제위기 이전 졸업자 표본은 높은 실업률이 탈출확률을 낮추는 반면 경제위기 이후 졸업자 표본은 정반대의 결과를 보여준다.

• Journal of Mechanical Science and Technology
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• 제20권7호
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• pp.1077-1088
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• 2006

This paper describes a numerical investigation on the performance deteriorations of a low speed, single-stage axial turbine due to use of rough blades. Numerical calculations have been carried out with a commercial CFD code, CFX-Tascflow, by using a modified wall function to implement rough surfaces on the stator vane and rotor blade. To assess the stage performance variations corresponding to 5 equivalent sand-grain roughness heights from a transition ally rough regime to a fully rough regime, stage work coefficient and total to static efficiency were chosen. Numerical results showed that both work coefficient and stage efficiency reduced as roughness height increased. Higher surface roughness induced higher blade loading both on the stator and rotor which in turn resulted in higher deviation angles and corresponding work coefficient reductions. Although, deviation angle changes were small, a simple sensitivity analysis suggested that their contributions on work coefficient reductions were substantial. Higher profile loss coefficients were predicted by higher roughness heights, especially on the suction surface of the stator and rotor. Furthermore sensitivity analysis similar to the above, suggested that additional profile loss generations due to roughness were accountable for efficiency reductions.

• Transactions on Electrical and Electronic Materials
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• 제11권1호
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• pp.1-10
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• 2010

This is an overview paper reporting our most recent work on processing and microstructure of nano-structured oxides and their photoluminescence and photo-catalysis properties. Zinc oxide and related transition metal oxides such as vanadium pentoxide and titanium dioxide were produced by a combination of magnetron sputtering, hydrothermal growth and atmosphere controlled heat treatment. Special morphology and microstructure were created including nanorods arrays, core-brushes, nano-lollipops and multilayers with very large surface area. These structures showed special properties such as much enhanced photoluminescence and chemical reactivity. The photo-catalytic properties have also been promoted significantly. It is believed that two factors contributed to the high reactivity: the large surface area and the interaction between different oxides. The transition metal oxides with different band gaps have much enhanced photoluminescence under laser stimulation. Use of these complex oxide structures as electrodes can also improve the energy conversion efficiency of solar cells. The mixed oxide complex may provide a promising way to high-efficiency photo emitting materials and photo-catalysts.

• 한국산학기술학회논문지
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• 제15권7호
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• pp.4258-4271
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• 2014

본 연구는 병원에 근무하고 있는 의무기록사들의 직업전문성 인식도와 직무만족도에 영향을 미치는 요인을 알아보고자 서울시, 경기도, 대전시, 충청남도 및 충청북도에 소재하고 있는 53개 병원급 이상에서 근무하고 있는 의무기록사 314명을 대상으로 2013년 3월 4일부터 4월 23일까지의 기간 동안에 표준화된 자기기입식 설문지(self-administered questionnaire)를 이용한 설문조사를 실시하였다. 연구결과, 조사대상자들의 직업전문성인식도에는 성별, 연령, 결혼상태, 월수입, BMI, 직위, 업무에 대한 적성, 직업전환의사 및 장래 의무기록사에 대한 사회적 지위 전망에 대한 인식이 유의한 관련성이 있는 것으로 나타났으며, 특히 인구사회학적 특성과 직업관련 특성이 직업전문성인식도와 높은 관련성이 있었다. 조사 대상자들의 직무만족에는 연령, 월수입, BMI, 직위, 업무에 대한 만족도, 직업전환의사, 응답자 자신의 사회적 지위 전망에 대한 인식 및 직업전문성인식도가 유의한 관련성이 있는 것으로 나타났으며, 특히 직업관련 특성 변수와 직업전문성인식도가 직무만족도와 높은 관련성이 있는 것으로 나타났다. 위와 같은 연구결과는 의무기록사들의 직업전문성인식도에는 인구 사회학적 특성 및 직업관련 특성 변수들이 높은 관련성을 보였으며, 직무만족도에는 직업관련 특성 및 직업전문성인식도 변수들이 높은 관련성이 있음을 시사하고 있다.