• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제11권1호
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• pp.70-78
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• 2000

본 연구는 한국형 부모양육 스트레스 척도를 개발하기 위한 목적으로 실시되었다. Abidin의 부모양육 스트레스 검사(Parenting Stress Index)의 적용을 통해 기초연구가 수행되었다. 1차 예비조사는 $3{\sim}12$세 아동의 어머니에게 질문지를 배부하여 382부의 데이타로 요인 분석하였다. 그 결과, 아동영역의 문항 47개 문항 중 29개 문항, 5개 요인이 추출되었고, 부모영역의 문항 54개 문항 중 28개 문항, 5개 요인이 추출되었다. 1차 분석에서 추출된 57개 문항에 대해 2차 예비 조사에서는 만 $3{\sim}6$세 유아의 부모로부터 수집한 392부의 데이터로 재분석하였다. 문항변별도 분석을 위해 문항-총점 상관계수를 산출하여 r=.20 이하의 문항을 삭제하였다. 타당도 검증을 위해 내용타당도와 구조타당도를 살펴보았다. 구조타당도를 검증하기 위해 요인분석을 실시하였다. 그 결과, 아동영역에서는'부모강화', '수용성', '주의산만성', '요구성'의 4개 요인, 24개 문항이 추출되었다. 아동영역의 전체 공통분산 가운데 설명되는 공통분산은 82.05%로 나타났다. 부모영역에서는'역할제한', '우울감', '사회적 고립', '건강', '배우자 관계'의 5개 요인, 24개 문항이 추출되었다. 부모영역의 전체 공통분산 가운데 설명되는 공통분산은 82.40%로 나타났다. 척도의 신뢰도 검증을 위해 Cronbach's ${\alpha}$ 지수를 산출하였는데, 아동영역에서는 전체 신뢰도 ${\alpha}$=.81을 나타냈고, 각 요인별로 .69, .70, .67, .66을 나타냈다. 부모영역의 신뢰도 지수는 ${\alpha}$=.83이며 각 요인별로 .73, .70, .70, .55, .73을 나타냈다. 본 연구는 미국판 PSI 척도를 적용하여 한국에서의 양육 스트레스 척도를 한국문화에 알맞게 개발하기 위한 기초 연구로서 수행되었다. 따라서 추후 국내 문화에 알맞은 문항과 요인을 추가한 2차 연구의 필요성에 대해 논의하였다.

• 한국세라믹학회지
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• 제36권10호
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• pp.1035-1039
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• 1999

Ferroelectric properties and reliability characteristics of(111) and (100) preferentially oriented tetragonal Pb(Zr0.2Ti0.8)O3 (PZT) thin film capacitors have been investigated as a function of the top electrode thickness. The (111) preferentially oriented film exhibits 180$^{\circ}$domain switching process with better squareness of hysterisis loop and abrupt change of small singal capacitance-voltage comparing to the (100) preferentially oriented film having 90$^{\circ}$ domain switching process. The domain swithcing process of tetragonal phase PZT is different from that of rhobohedral phase. The film with thinner top electrode shows less initial switching polarization due to less compressive stress but it exhibits better endurance characteristics due to enhancing partial switching region.

• 대한음성학회지:말소리
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• 제42호
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• pp.71-88
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• 2001

This study is on the constraints of English Poetic Meter. In English poems, the metrical pattern doesn't always match the linguistic stress on the lines. These mismatches are found differently among the poets. The peaks mismatched with the weak metrical position are divided into the two ways according as they are adjacent to the boundary of a phonological domain or not. PAF and $^*UV$] are suggested for the mismatched peak which are not adjacent to the boundary of a phonological domain ; $^*Peak$] and BT for the mismatched peak which are adjacent to the boundary of a phonological domain. For the lexical stress mismatched with the weak metrical position, $^*W{\;}{\Rightarrow}{\;}Strength$ is set up by the concept of the strong syllable. $MPS{\;}{\Rightarrow}{\;}\Phi_{max}$ for the metrical position size can replace the resolution which is used to control the number of syllables in English poems. These constraints show the different hierarchies among the poets.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.1206-1210
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• 2003

Effect of transverse electric field on crack kinking in ferroelectric ceramics subjected to purely electric loading is investigated. It is shown that the shape and size of the domain switching zone depends strongly on the direction of the applied electric field as well as the ratio of the transverse electric field to the coercive electric field. Under small-scale conditions, mode I and II stress intensity factors induced by ferroelectric domain switching are numerically obtained. The crack kinking in ferroelectrics is also discussed.

• 한국정밀공학회지
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• 제22권2호
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• pp.120-125
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• 2005

Effect of transverse electric fields on fracture behavior in ferroelectric ceramics under purely electrical loading is investigated. It is shown that the shape and size of the domain switching zone depend strongly on the ratio of the transverse electric field to the coercive electric field as well as the direction of the applied electric field. Under small-scale conditions, the crack-tip mode I and II stress intensity factors induced by ferroelectric domain switching are numerically obtained. The crack kinking in ferroelectric ceramics is also discussed.

• 대한기계학회논문집A
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• 제27권4호
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• pp.577-584
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• 2003

A crack with growth in ferroelectric ceramics under purely electric loading is analyzed. The crack tip stress intensity factor for the growing crack under small-scale conditions is evaluated by employing the model of nonlinear domain switching. The crack tip stress intensity factor increases or decreases with crack growth, depending on the electrical nonlinear behavior and the direction of an applied electric field. It is shown that the ferroelectric material can be either toughened or weakened as the crack grows. The steady state crack growth in ferroelectric ceramics is also discussed.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2002년도 동계연구발표회 논문개요집
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• pp.210-211
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• 2002

The magnetic anisotropy of amorphous wires plays a decisive role in the giant magnetoimpedance(GMI) behavior. The magnetoelastic anisotropy caused by internal stress, that are frozen in during the fabrication process, results in an axial easy axis in the core region and in a circular easy axis in the shell region [1]. It leads to a simple domain structure consisting of circular domains in the shell and axial domains in the core. For a more realistic domain structure, it has been suggested that the helical anisotropy exists due to an internal helical stress [2]. (omitted)

• BMB Reports
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• 제43권1호
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• pp.1-8
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• 2010

The cold shock domain (CSD) is among the most ancient and well conserved nucleic acid binding domains from bacteria to higher animals and plants. The CSD facilitates binding to RNA, ssDNA and dsDNA and most functions attributed to cold shock domain proteins are mediated by this nucleic acid binding activity. In prokaryotes, cold shock domain proteins only contain a single CSD and are termed cold shock proteins (Csps). In animal model systems, various auxiliary domains are present in addition to the CSD and are commonly named Y-box proteins. Similar to animal CSPs, plant CSPs contain auxiliary C-terminal domains in addition to their N-terminal CSD. Cold shock domain proteins have been shown to play important roles in development and stress adaptation in wide variety of organisms. In this review, the structure, function and regulation of plant CSPs are compared and contrasted to the characteristics of bacterial and animal CSPs.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 춘계학술대회 논문집 센서 박막재료 반도체 세라믹
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• pp.253-256
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• 2003

This study presents the combined effect of electric field application and mechanical compressive stress loading on deformation in a multilayer ceramic actuator, designed with stacking alternatively $0.2(PbMn_{1/3}Nb_{2/3}O_3)-0.8(PbZr_{0.475}Ti_{0.525}O_3)$ ceramics and Ag-Pd electrode. The deformation behaviors were thought to be attributed to relative $180^{\circ}$domain quantities which is determined by pre-loaded stress and electric field. The non-linearity of piezoelectricity and strain are dependent upon the young's modulus resulting from the domain reorientation.

• Structural Engineering and Mechanics
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• 제31권6호
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• pp.717-735
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• 2009

The present problem is concerned with the study of deformation of micropolar thermoelastic medium with voids under the influence of various sources acting on the plane surface. The analytic expressions of displacement components, force stress, couple stress, change in volume fraction field and temperature distribution are obtained in the transformed domain for Lord-Shulman (L-S) theory of thermoelasticity after applying the integral transforms. A numerical inversion technique has been applied to obtain the solution in the physical domain. The numerical results are presented graphically. Some useful particular cases have also been deduced.