• 제목/요약/키워드: Physical Science Domain

검색결과 203건 처리시간 0.034초

Plane waves in generalized magneto-thermo-viscoelastic medium with voids under the effect of initial stress and laser pulse heating

  • Othman, Mohamed I.A.;Fekry, Montaser;Marin, Marin
    • Structural Engineering and Mechanics
    • /
    • 제73권6호
    • /
    • pp.621-629
    • /
    • 2020
  • The present paper aims to study the influence of the magnetic field and initial stress on the 2-D problem of generalized thermo-viscoelastic material with voids subject to thermal loading by a laser pulse in the context of the Lord-Shulman and the classical dynamical coupled theories. The analytical expressions for the physical quantities are obtained in the physical domain by using the normal mode analysis. These expressions are calculated numerically for a specific material and explained graphically. Comparisons are made with the results predicted by the Lord-Shulman and the coupled theories in the presence and absence of the initial stress and the magnetic field.

Effect of heat source and gravity on a fractional order fiber reinforced thermoelastic medium

  • Jain, Kavita;Kalkal, Kapil Kumar;Deswal, Sunita
    • Structural Engineering and Mechanics
    • /
    • 제68권2호
    • /
    • pp.215-226
    • /
    • 2018
  • In this article, the theory of fractional order two temperature generalized thermoelasticity is employed to study the wave propagation in a fiber reinforced anisotropic thermoelastic half space in the presence of moving internal heat source. The whole space is assumed to be under the influence of gravity. The surface of the half-space is subjected to an inclined load. Laplace and Fourier transform techniques are employed to solve the problem. Expressions for different field variables in the physical domain are derived by the application of numerical inversion technique. Physical fields are presented graphically to study the effects of gravity and heat source. Effects of time, reinforcement, fractional parameter and inclination of load have also been reported. Results of some earlier workers have been deduced from the present analysis.

The effect of multi-phase-lag and Coriolis acceleration on a fiber-reinforced isotropic thermoelastic medium

  • Alharbi, Amnah M.;Said, Samia M.;Othman, Mohamed I.A.
    • Steel and Composite Structures
    • /
    • 제39권2호
    • /
    • pp.125-134
    • /
    • 2021
  • The three-phase-lag model, thermoelasticity without energy dissipation (G-N II) theory and thermoelasticity with energy dissipation (G-N III) theory are applied to study the effect of rotation on a fiber-reinforced thermoelastic medium. The exact expressions for the physical quantities were obtained by using the normal mode analysis. The numerical results for the field quantities are given in the physical domain and illustrated graphically in the absence and presence of rotation, Coriolis acceleration as well as reinforcement parameters.

Variability of thermal properties for a thermoelastic loaded nanobeam excited by harmonically varying heat

  • Abouelregal, A.E.;Zenkour, A.M.
    • Smart Structures and Systems
    • /
    • 제20권4호
    • /
    • pp.451-460
    • /
    • 2017
  • This work produces a new model of nonlocal thermoelastic nanobeams of temperature-dependent physical properties. A nanobeam is excited by harmonically varying heat and subjected to an exponential decaying time varying load. The analytical solution is obtained by means of Laplace transform method in time domain. Inversions of transformed solutions have been preceded by using calculus of residues. Effects of nonlocal parameter, variability thermal conductivity, varying load and angular frequency of thermal vibration on studied fields of nanobeam are investigated and discussed.

Decaying temperature and dynamic response of a thermoelastic nanobeam to a moving load

  • Zenkour, Ashraf M.;Abouelregal, Ahmed E.
    • Advances in Computational Design
    • /
    • 제3권1호
    • /
    • pp.1-16
    • /
    • 2018
  • The decaying temperature and dynamic response of a thermoelastic nanobeam subjected to a moving load has been investigated in the context of generalized theory of nonlocal thermoelasticity. The transformed distributions of deflection, temperature, axial displacement and bending moment are obtained by using Laplace transformation. By applying a numerical inversion method, the results of these fields are then inverted and obtained in the physical domain. Also, for a particular two models, numerical results are discussed and presented graphically. Some specific and special results are derived from the current study.

물리치료 내원환자의 만족도에 영향을 미치는 요인 분석 (An Analysis of Factors Affecting Satisfaction of Physical Therapy Patients)

  • 손애리;김미원
    • 대한물리치료과학회지
    • /
    • 제9권4호
    • /
    • pp.63-72
    • /
    • 2002
  • Patient satisfaction is an important factor in evaluating the quality of care. Patient satisfaction may be used to evaluate provider services and facilities, and used to predict the patient returns to a facility. The patients d whether the patient returns to a facility or whether the patient recommends the facility to other people may be affected by a variety of factors of patient satisfaction. Low satisfaction may result in poor compliance with the potential of waste of resources and suboptimal clinical outcome. This study is to identify factors of patient satisfaction that will affect patients decision whether the patient returns or not. A self-administered questionnaire survey was conducted in Seoul, Chung-Joo and Bu-Cheon cities, Survey data was obtained from 743 patients who visited the physical therapy practice at university hospitals, general hospitals and clinics. Response rate was 94.4%. The instrument developed by Goldstein et al. (2000) was used and translated into Korean. Several items were added to the instrument. Patient's opinions of service in each domain measured using 5-point Likert-type scales that ranged from strongly disagree to strongly agree. A multiple-regression analytic approach was used to predict overall satisfaction of physical therapy. Age, kindness, scheduling, convenience of parking, privacy, and waiting time predicted the overall satisfaction of physical therapy. The older patients had higher level of satisfaction with physical therapy compared with the younger patients. Patient satisfaction were more affected by access (scheduling and waiting time), administrative technical management (convenience of parking), and interpersonal management (kindness of physical therapists and other staffs) than clinical technical management (physical therapists' skills).

  • PDF

우리나라 2009 개정 초등 과학교육과정과 핀란드 초등 과학교육과정 비교분석 (Comparison and Analysis of the 2009 Elementary Science Curriculum of South Korea and the Elementary Science Curriculum of Finland)

  • 이소영;노석구
    • 한국초등과학교육학회지:초등과학교육
    • /
    • 제33권3호
    • /
    • pp.491-509
    • /
    • 2014
  • The purpose of this study was to compare and analyze the elementary science curriculum of Finland, which ranked at the first place in the science domain of Programme for International Student Assessment (PISA), a comparative study on the academic achievements of OECD member nations, for three consecutive years and recorded a high national competitiveness index, and that of South Korea, thus providing information needed to develop curriculums and textbooks in the middle of occasional curriculum revisions and giving useful implications for the implementation of curriculum in the field of education in South Korea. The research findings were as follows: First, as for the science content areas based on the ratio of large area items according to the evaluation and analysis framework of TIMSS 2007, South Korea's ratio of life, chemistry, physics, and earth hardly showed fitness for TIMSS 2007 and exhibited equal distribution among the areas. In Finland, the ratio of life, chemistry, physical, and earth was similar to the fourth grade level of TIMSS 2007. The country showed differential distribution with life accounting for the highest percentage. Second, as for the cognitive domains, South Korea showed a high percentage in "Uses and Procedures of Tools" of "1. Knowing" and "Making Connections," "Comparison/Contrast/Classification," and "Uses of Models" of "2. Application." Finland recorded a high percentage in "Information Interpretation" of "2. Application." While South Korea focused on the uses and methods of scientific instruments during scientific activities, Finland made an approach with a focus on problems related to daily life such as the interpretation of information including reports and graphs from an interpretative perspective.

림프마사지 교육프로그램이 유방절제술환자의 상지 기능상태와 삶의 질에 미치는 효과 (Effects of Educational Program of Manual Lymph Massage on the Arm Functioning and the Quality of Life in Breast Cancer Patients)

  • 이은숙;김성효;김선미;선정주
    • 대한간호학회지
    • /
    • 제35권7호
    • /
    • pp.1390-1400
    • /
    • 2005
  • Purpose: The purpose of this study was to determine the effect of EPMLM(educational program of manual lymph massage) on the arm functioning and QOL(quality of life) in breast cancer patients with lymphedema. Method: Subjects in the experimental group(n=20) participated in EPMLM for 6 weeks from June to July, 2005. The EPMLM consisted of training of lymph massage for 2 weeks and encourage and support of self-care using lymph massage for 4 weeks. The arm functioning assessed at pre-treatment, 2weeks, and 6weeks using Arm functioning questionnaire. The QOL assessed at pre-treatment and 6 weeks using SF-36. The outcome data of experimental group was compared with control group(n=20). The collected data was analyzed by using SPSS 10.0 statistical program. Result: The arm functioning of experimental group was increased from 2 weeks after(W=.224, p=.011) and statistically differenced with control group at 2 weeks(Z=-2.241, p=.024) and 6 weeks(Z=-2.453, p=.013). Physical function of QOL domain increased in experimental group(Z=-1.162, p=.050), also statistically differenced with control group(Z=-2.182, p= .030) at 6weeks. Conclusion: The results suggest that the educational program of manual lymph massage can improve arm functioning and physical function of QOL domain in breast cancer patients with lymphedema.

초등학교 체육교과서 무용교육 내용 분석 (Analysis of Dance Education Content in Elementary School Physical Education Textbooks)

  • 배명훈
    • 한국응용과학기술학회지
    • /
    • 제39권2호
    • /
    • pp.261-270
    • /
    • 2022
  • 이 연구는 무용교육 활성화를 위해 학교 현장에서 활용되고 있는 3, 4, 5, 6학년 체육교과서 8종 32권을 확보하여 관련 내용을 분석하고자 하였다. 그 결과, 3학년 표현 영역은 움직임 언어와 표현 요소를 중심으로 교과서를 편성하고 있었다. 4학년은 대다수 교과서들이 공, 후프, 리본을 이용한 체조를 제시하고 있었으며, 5학년의 경우 우리나라 민속춤과 관련하여 강강술래, 탈춤이 제시되어 있었으며, 외국 민속 무용과 관련하여 티니클링, 구스타프스콜이 제시되어 있었다. 6학년의 경우 주제표현과 관련하여 표현 요소 탐색과 표현 과정을 제시하였으며, 창작체조를 중심으로 주제 표현을 할 수 있도록 하였다. 또한, 실용 무용 중 라인댄스가 대다수의 교과서에서 제시되고 있었다. 표현 영역은 그 가치의 중요성에도 불구하고 다양한 내외적 문제들로 인해 학교 현장교사들은 교수·학습에 어려움을 호소하고 있는 실정이다. 표현 영역은 인지, 심동, 정의적 영역 모두에서 효과를 발휘 할 수 있다는 점에서 활성화의 필요성이 제기되며, 이 연구는 이러한 맥락에서 현장에서의 표현 영역 수업 활성화에 기여할 수 있을 것으로 생각된다.

Quantum Sensing Research: A Scientometric Assessment of Global Publications during 1991-2020

  • Gupta, Brij Mohan;Dhawan, Surinder Mohan;Mamdapur, Ghouse Modin
    • International Journal of Knowledge Content Development & Technology
    • /
    • 제12권3호
    • /
    • pp.31-49
    • /
    • 2022
  • The study presents a global research scenario in the domain of quantum sensing in quantitative and qualitative terms. The study is based on an analysis of 588 global publications in the field, sourced from the Scopus database for the period 1991-2020. The study identified key countries, organizations and authors, network collaborative linkages at national, institutional, and author level. In addition, it identified broad subject areas intersecting quantum sensing research, key journals for research communications, and broad characteristics of highly-cited papers. The study finds that the USA and Germany lead the world ranking in quantum sensing research with a combined share of 50% to the global output. The USA, Germany, and Italy are the home countries to 13 of the top 15 most productive organizations, and also the home countries to 14 of the top 15 most productive authors in the subject. The top journals publishing most research publications are Physical Review A, Physical Review Letters and New Journal of Physics. However, in the most cited journals list in the subject, Agriculture & Forest Meterology, Science and Physical Review A tops the list.