• 제목/요약/키워드: critical means

검색결과 974건 처리시간 0.033초

미디어 교육의 개념 변화에 대한 고찰 (Study for the Conceptual Variety of Media Education)

  • 김양은
    • 한국언론정보학보
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    • 제28권
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    • pp.77-110
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    • 2005
  • 본 연구는 미디어 교육의 개념 변화를 살펴보는 데 목적이 있다. 이를 위해서 본 연구는 미디어 교육을 둘러싼 2가지 차원에서의 변화를 살펴보았다. 첫 번째로, 새로운 미디어의 등장, 수용자의 이용자로의 변화, 교육환경의 변화의 3가지 차원에서의 미디어 교육을 둘러싼 환경변화를 살펴보았다. 두 번째로, 미디어 교육의 다양한 패러다임의 변화를 살펴보았다. 이를 통해서 역사적으로 미디어 교육이 미디어 이론과 연관성을 맺으면서 발전되는 과정을 살펴보았다. 미디어 교육의 환경과 이론적 토대의 변화는 미디어 교육의 개념이 변화해야 할 필요성을 말해주고 있다. 본 연구에서는 다양한 학자들이 제시하는 미디어 교육의 개념을 살펴보았다. 미디어 교육은 초기의 텔레비전에 대한 교육에서 새로운 학문영역으로 정의되고 있다. 또한 미디어 교육은 새로운 미디어의 등장에 따라서 커뮤니케이션 능력으로서 미디어 리터러시의 개념으로 확장시켜야 한다. 이러한 변화는 미디어 교육이 언어적 차원, 미디어 내용의 비판적 해석, 사회와의 소통이라는 다양한 형태로 확장되어짐을 의미한다.

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SMART 연구로의 증기발생기 전열관 파열사고 민감도 분석 (A Sensitivity Study of a Steam Generator Tube Rupture for the SMART-P)

  • 김희경;정영종;양수형;김희철;지성균
    • 한국안전학회지
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    • 제20권2호
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    • pp.32-37
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    • 2005
  • The purpose of this study is for the sensitivity study f9r a Steam Generator Tube Rupture (SGTR) of the System-integrated Modular Advanced ReacTor for a Pilot (SMART-P) plant. The thermal hydraulic analysis of a SGIR for the Limiting Conditions for Operation (LCO) is performed using TASS/SMR code. The TASS/SMR code can calculate the core power, pressure, flow, temperature and other values of the primary and secondary system for the various initiating conditions. The major concern of this sensitivity study is not the minimum Critical Heat Flux Ratio(CHFR) but the maximum leakage amount from the primary to secondary sides at the steam generator. Therefore the break area causing the maximum accumulated break flow is researched for this reason. In the case of a SGIR for the SMART-p, the total integrated break flow is 11,740kg in the worst case scenario, the minimum CHFR is maintained at Over 1.3 and the hottest fuel rod temperature is below 606"I during the transient. It means that the integrity of the fuel rod is guaranteed. The reactor coolant system and the secondary system pressures are maintained below 18.7MPa, which is system design pressure.

의료이용의 형평성에 관한 실증적 연구 -공.교 의료보험 피부양자를 대상으로- (Equity in the Delivery of Health care in the Republic of Korea)

  • 명지영;문옥륜
    • 보건행정학회지
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    • 제5권2호
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    • pp.155-172
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    • 1995
  • This study is an empirical analysis on the equity in the delivery of heatlh care under the Korean Medical Insurance Corporation System. The purposes of this study are to find out effects of income on the health care utiliztion and measure the income-related inequity in the distribution of health care. This study was carried out based on the fact that the health insurance program has been organized to achieve the equity objective, "equal treatment for equal needs". Of 41, 828 insured persons who had been diagnosed in the 1993 Health Screening Test and utilifzation data from 1, January 1993 through 31, December 1993 were derived from the Benefit Managment File. Inequity was measured by means of I) share approach, ii) standardization concentration curve approach, iii) inequity index, iv) test for inequity. The major findings were as follows : 1. The expenditure shares of the top two quintile groups exceeded their morbidity shares, whereas the opposite was true of the bottom three quintile groups, Which showed a positive HI$_{LG}$ inequity index, suggesting the presence of some inequity favoring the rich group. 2. Compared with other residential areas, the rural area showed the highest positive HI$_{LG}$ irrespective of need indicatior applied. 3. Standardized expenditure concentration indices adjusted by age, gender and need structure were also found to be positive, and therefore still indicated that there has been inequity favoring the rich after the standardization. 4. The Loglikelihood Ratio (LR) test for the statistical significance of income-related inequity of medical care utilization was carried out using the logistic regression model. The resulting loglikelihood ratio test statistic value was 176, which did exceed the 0.5 percent critical value of the chi-square distribution with 28 degrees of freedom, which is 50.993. Therefore, the null hypothesis of no income-related inequity of medical care utilization was rejected at the 99.5 percent confidence level. 5. The Regression based F-test has been carried out for analyzing the income-related inequity of medical expenditure in terms of age, gender, morbidity indicators as explanary variables. The hypothesis of the absence of income-relate inequity was rejected for all need indicators at the 95% confidence level.nce level.

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Features and Properties of $YBa_2$$Cu_3$$O_{7-x}$ Films Grown on SrTi$O_3$ by High Frequency PLD

  • Shi, D.Q.;Ko, R.K.;Song, K.J.;Chung, J.K.;Choi, S.J.;Park, Y.M.;Shin, K.C.;Yoo, S.I.;Park, C.
    • Progress in Superconductivity
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    • 제5권1호
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    • pp.75-79
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    • 2003
  • YBCO films were deposited with various thicknesses from 100nm to 1.6$\mu\textrm{m}$ on single crystal $SrTiO_3$ substrates by pulsed laser deposition (PLD). The effects of different deposition conditions, especially different deposition rates by means of changing the pulsed laser frequency up to 200Hz, on the J$_{c}$ value were studied. For YBCO film with the thickness of 200nm, the $J_{c}$ value of $2.1MA/\textrm{cm}^2$ has been achieved under the high deposition rate of 3.2nm/s (190nm/min). The $J_{c}$ can be maintained greater than $1M/\textrm{cm}^2$ with the thickness less than 1$\mu\textrm{m}$. The X-ray analysis was used to examine the texture, crystallization and surface quality. The SEM was employed to analyze the surface of YBCO, and it was shown the surface of YBCO film became rougher with increasing the thickness. There were many large singular outgrowths and networks of outgrowths on the surface of YBCO films which lowered the density of thick YBCO film. The outgrowth network was probably the a-axis YBCO corresponding to XRD $\theta$-2$\theta$scan and $\chi$-scan which were used to characterize a-axis orientation of YBCO film. The reason for J$_{c}$ declining with increasing the thickness was studied and discussed.sed.

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컴팩트형 열교환기의 핀 표면에서 발생하는 경계층이 열교환기의 전열 및 압력강하 특성의 변화에 미치는 영향에 관한 수치해석적 연구 (Effect of Boundary Layer Generated on the fin surfaces of a Compact Heat Exchanger on the Heat Transfer and Pressure Drop Characteristics)

  • 김철호;정지용
    • 한국전산유체공학회지
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    • 제3권1호
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    • pp.82-88
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    • 1998
  • As a par of a project related to the development of the design algorithm of a compact heat exchanger for the application of the electronic home appliances, the effect of the discreteness of the airflow boundary generated on the cooling fin surface on the heat transfer and pressure drop characteristics of the heat exchanger was studied numerically. In general, there are two critical design parameters seriously considered in the design of the heat exchanger; heat transfer rate(Q) and pressure drop coefficient(C/sub p/). Even though the higher heat transfer rate with lower pressure drop characteristics is required in a design of the heat exchanger, it is not an easy job to satisfy both conditions at the same time because these two parameters are phenomenally inversely proportional. To control the boundary layer thickness and its length along the streamline, the surface of the flat fin was modified to accelerate the heat transfer rate on the fin surface. To understand the effect of the discreted fin size(S/sub w/) and its location(S/sub h/) on the performance of the heat exchanger in the airflow field, the flat fin was modified as shown in Fig. 1. From this study, it was found that the smaller and more number of slits on the fin surface showed the higher energy diffusion rate. It means that the discreteness of the boundary layer is quite important on the heat transfer rate of the heat exchanger. On the other hand, if the fin surface configuration is very complex than needed, higher static pressure drop occurs than required in a system and it may be a reason of the induced aerodynamic noise in the heat exchanger.

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FEM을 이용한 확관형 충돌에너지 흡수부재의 좌굴불안전성에 관한 연구 (The study on the buckling instability of the expansion tube type crash energy absorber by using the FEM)

  • 최원목;정현승;권태수
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회A
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    • pp.774-779
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    • 2007
  • The crash energy absorbers used in the trains normally are classified into two types. The first is the structure type, which mainly used in not only the primary structure of train but also the crash energy absorbers at the critical accidents. The second is the module type, which just absorbs the crash energy independently and attached onto the structures of the trains. The expansion tube is widely used as the module type of the crash energy absorbers, especially in the trains that have a heavy mass. Since the crash energy is absorbed by means of expanding the tube in the radial direction, the features of the expansion tube have the uniform load during the compression. As the uniform load remains in sudden impact, the expansion tube is effective to decrease acceleration of passengers when the train accident occur. The buckling instability of the expansion tubes is affected by the boundary conditions, thickness and length of tube. In this study, the effects of the length and thickness of the expansion tubes under the arbitrary load on the buckling are studied using the ABAQUS/standard and ABAQUS/explicit, a commercial finite element analysis program, and then presents the guideline to design the expansion tubes. The analysis processes to compute the buckling load consist of the linear buckling analysis and the nonlinear post-buckling analysis. To analysis the nonlinear post-buckling analysis, the geometry imperfections are introduced by applying the linear buckling modes to nonlinear post-buckling analysis.

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XPS® Microresector(Shaver)를 이용한 액취증 수술 (XPS® Microresector for Treatment of Axillary Osmidrosis)

  • 한병기;박성욱;송재용;김정헌
    • Archives of Plastic Surgery
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    • 제35권5호
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    • pp.569-573
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    • 2008
  • Purpose: Surgical excision of the subcutaneous tissues, with or without skin excision in the axillary hair-bearing area, has been the treatment of choice in treating osmidrosis for several decades. However, long periods of postoperative immobilization of a shoulder joint, partial necrosis of skin flaps or the possibility of hematoma and scars have occurred frequently. So we used $XPS^{(R)}$ microresector(Shaver) in procedure which requires removal of soft tissue for comparing results between surgical excision and the laters. Methods: From January 2007 to February 2008, a total of 20 patients(8 male and 12 female) underwent $XPS^{(R)}$ microresector(Shaver) assisted aspiration for treating osmidrosis. The mean age of the subjects was 21.9, and we tried to analyze some advantages of $XPS^{(R)}$ microresector(Shaver). Results: The average operation time was 61.6 minutes. This results can show that the patients who received $XPS^{(R)}$ microresector(Shaver) assisted aspiration can accomplish better outcomes than any other procedures in terms of operation time at least. Moreover, no significant postoperative complications occurred in our studies. Subjects have been followed up from 2 months to 1 year and among these patients, no one suffered from critical complications. Conclusion: In brief, $XPS^{(R)}$ microresector(Shaver) is able to shorten the time of operation and simplify the procedures relatively and this device has more superiorities in wound healing by maintaining of vascularized dermal skin flaps. It means that $XPS^{(R)}$ microresector (Shaver) can prevent flap necrosis, axillary hair loss and minimalize scarring and bleeding. Thus, we expect that these advantages can lead to better patient's comfort and self-confidence than several previous procedures.

레이다 및 카메라 내장형 스마트 조명에서 실종자 탐지용 색상 검출 향상 기법 (Enhancement Techniques of Color Segmentation for Detecting Missing Persons in Smart Lighting System using Radar and Camera Sensors)

  • 송승언;김상동;진영석;이종훈
    • 한국산업정보학회논문지
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    • 제25권3호
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    • pp.53-59
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    • 2020
  • 본 논문은 레이더와 카메라를 이용한 스마트 조명 시스템에서 실종자 탐지를 위한 색상 검출 방안을 제안한다. 최근 레이더와 카메라가 내장된 스마트 조명 시스템이 에너지 절약과 동시에 효율적인 실종자 검색에 도움이 된다고 보고 된 바 있다. 스마트 조명 시스템에서 레이다 센서는 조명 주변에 움직임을 감지한다. 조명 주변에서 움직임이 감지되면, 조명이 작동하고 카메라는 녹화기능을 수행한다. 여기서, 스마트 조명에 녹화된 영상은 실종자를 탐색하는 데 활용한다. 특히, 녹화된 영상에서 실종된 사람이 입고 있는 옷의 색상은 실종자를 찾는 데 중요한 단서 중의 하나이다. 이러한단서인 옷의 색상을 식별하기 위한 방법으로 색상 검출을 활용한다. 또한, 색상 검출 과정에서 배경의 영향을 줄이기 위해서 대상체를 고려한 ROI(Region of interest)를 적용한다. 실험 결과에 따르면, ROI를 적용한 경우 색상 검출의 정확도는 97% 이상을 보였다.

패션 브랜드가 비밀을 밝힐 때 -패션 브랜드의 CSR 정보 투명성과 소비자 평가- (When Fashion Brand Reveals a Secrete -A Fashion Brand's CSR Information Transparency and Consumer Evaluation-)

  • 김송미;박선양;김하연
    • 한국의류학회지
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    • 제44권3호
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    • pp.385-399
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    • 2020
  • Corporate social responsibility is a consistently discussed theme in many industries. Most corporations engage in CSR activities and now inform consumers in detail on what they have been doing for society. It has become a critical tool of consumer communication; however, little is known regarding the role of information transparency in the context of the fashion industry. This study discusses information transparency of fashion corporations which means revealing information regarding cost and garment making processes. The research proved that the higher consumers perceive a fashion brand's CSR performance (CSP), the more they think the provided CSR information is substantial; consequently, there is a favorable evaluation of the brand. The result provides insight regarding the relationship between CSP perception, perceived information substantiality, and brand evaluation. There was a significant partial mediation effect of perceived information substantiality. Moreover, the moderated mediation effect of information transparency appeared significant on the impact of CSP perception for brand evaluation via CSR information substantiality. The process model 7 was used as an analytical tool. The results of this study implies the importance of information transparency in the fashion industry context in the digital era.

<노다메 칸타빌레>의 내러티브 구조와 기호학적 분석 (A semiotic analysis of narrative structure in )

  • 권재웅;최세영
    • 만화애니메이션 연구
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    • 통권27호
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    • pp.127-151
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    • 2012
  • <노다메 칸타빌레>는 클래식 음악을 다룬 장르만화이다. 만화가 니노미야 도모코에 의해 2001년부터 연재가 시작되어 2009년 10월까지 총 23권으로 출간된 이 작은 노다메 신드롬이라고 불릴 정도의 각광을 받아 왔다. 본 연구는 <노다메 칸타빌레>라는 음악 장르를 대상으로 한 만화에서 나타난 내러티브 구조의 특징을 기호학적 모델을 통해서 분석함을 목적으로 한다. 내러티브 구조는 먼저 그레마스가 제시한 세 가지의 시련과정을 통해서 이야기의 흐름이 어떻게 주어져 있는 지를 분석하고자 한다. 그리고 행위자 모델과 기호학적 사각형 모델을 적용하여 이야기 구성의 행위자들이 어떻게 배치되어있는 지와 행위자들을 둘러싼 사회적 담론의 의미 구조가 어떻게 생성되어있는 지를 고찰하고자 한다. 분석에 따르면, 만화에서 클래식 음악에 대한 사회적 담론으로 채택된 것은 천부적 재능과 도제식 교육방식의 관계이다. <노다메 칸타빌레>는 천부적 재능의 발현을 가로막는 대립 항으로 도제식 교육을 설정하는 것으로 나타났다. 이는 현실 세계를 주도하는 음악 교육의 방식에 대한 비판적 견해라고 할 수 있다.