초음파 연조직 팬텀에서 횡탄성의 측정

박정만,최승민,권성재,정목근,Park, Jeong-Man,Choi, Seung-Min,Kwon, Sung-Jae,Jeong, Mok-Kun 한국음향학회 2012 韓國音響學會誌 Vol.31 No.6

본 논문에서는 초음파 연조직 팬텀에서 음향 복사력을 이용하여 횡탄성(shear modulus)을 측정하는 방법을 제안하였다. 이 방법은 집속 초음파 빔의 초점에서 음향 복사력에 의해 발생하는 변위의 상승시간에 기초하여 횡탄성을 정량적으로 산정한다. 제안한 방법의 타당성을 확인하기 위하여 횡파 전파법으로 측정한 횡파의 속도 및 횡탄성값 결과와 비교하였다. 횡파 전파법은 제한회절 송신음장에 의해 팬텀에서 발생하여 전파하는 횡파의 속도를 측정하여 횡탄성값을 계산하고, 이 값으로 교정된 데이터 획득 시스템에서 제안한 방법으로 측정한 횡탄성값을 횡파 전파법으로 측정한 값과 비교하여, 제안한 횡탄성 측정법의 유용성을 확인하였다. 두 방법 간의 상대오차는 횡파 속도는 4%로, 횡탄성값은 9% 이하로 계산되었다. In this paper we propose a method for measuring the shear modulus of an ultrasound soft tissue phantom using an acoustic radiation force. The proposed method quantitatively determines the shear modulus based on the rise time of a displacement induced by an acoustic radiation force at the focal point of a focused ultrasound beam. The shear wave speed and shear modulus obtained from the proposed method and a shear wave propagation method were compared to verify the validity of the proposed method. In the shear wave propagation method, the shear modulus is first computed by measuring the propagating speed of a shear wave induced in a phantom by a limited-diffraction transmit field, and then was compared to that obtained with the proposed method in an ultrasound data acquisition system calibrated based on the first computed shear modulus. The relative errors between the two methods were found to be 4% for shear wave speed and less than 9% for shear modulus, confirming the usefulness of the proposed method.

천년을 사는 비법

박정만,Park, Jeong-Man 한국정보통신집흥협회 1999 정보화사회 Vol.131 No.-

사상의학과 여름나기

박정만,Park, Jeong-Man 한국정보통신집흥협회 1999 정보화사회 Vol.130 No.-

공기 유압식 브레이크 라인 파손 사례 및 파손 분석 연구

박정만,박종진,Park, Jeongman,Park, Jongjin 한국자동차안전학회 2020 자동차안전학회지 Vol.12 No.2

In this case study, the brake line failure of air over hydraulic(AOH) brake system is described. AOH brake system is applied to commercial vehicles between 5 to 8 tons. It consists of a hydraulic system using compressed air and operates the air master to form hydraulic pressure to transfer braking power to the wheels. When the brake lines of the system applied to vehicles with high load capacity are damaged, the braking force of one shaft is lost, and the braking distance increases rapidly, leading to a big accident. Failure of the brake line occurs due to various causes such as road surface fragmentation, corrosion of the line, and aged deterioration of air brake hose. The braking force could be decreased even when a very small break in the form of a pin-hole occurs. However, it is difficult to find a part where the thickness of the line is thin due to stone pecking or corrosion generated in the pin-hole formed on the brake line located under the lower part of the vehicle by the sensory evaluation or the conventional braking force test. Accordingly, it is necessary to analyze the condition and cause of the failure of the brake line more precisely when the accident investigation of the heavy vehicles, and also to examine the necessity of the advanced test for the aged brake line.

한국의 얀 마텔 연구 현황과 전망

박정만(Jungman Park) 한국영미문학교육학회 2023 영미문학교육 Vol.27 No.3

More than 20 years have passed since 2002 when the novel Life of Pi and author Yann Martel’s name began to become known in Korea with the winning of the Man Booker Prize, and since 2004 when the novel was translated and published in Korea. Additionally, about 10 years have passed since the novel was adapted into a film in 2012, and the film Life of Pi was released in Korea the next year of 2013. It has been at least 10 or as long as 20 years since Yann Martel’s name was imprinted in the memory of Korean readers and the film public. At this point a question arises. So, how has Yann Martel been remembered during this period, not by readers and the film public, but by Korean academics? In other words, how has Yann Martel ‘research’ developed in Korea over the past 20 years to the present? Responding to the question, this study examines the development and status of Yann Martel research in Korea, focusing on research papers published in domestic academic journals over the past 20 years to date, to be precise, from 2015 to 2023. To this end, a quantitative analysis of the papers and a qualitative analysis of the topic and content covered by the papers will be conducted together. As a conclusion, this study will diagnose the challenges and future prospects left by the current Yann Martel research in Korea.

뉴욕의 아일랜드인 : The Mulligan Guard Ball에서의 아이리쉬 캐릭터, 정체성, 기억의 문제

박정만(Park Jungman) 한국현대영미드라마학회 2011 현대영미드라마 Vol.24 No.2

Edward Harrigan, a representative Irish-American dramatist in the late 19C, tries to mirror up the contemporary multi-ethnic immigrants in the Lower East Side of Manhattan, New York City. While exerting himself to make plays like pages from actual life, Harrigan creates an Irish comic character ‘type’ named Dan Mulligan. Dan, who is allowed positive sides of personality, is differentiated from the earlier Irish characters as ‘whiteface’ stereotypes. Such positivity of Dan, the Irish character type, reflects Harrigan’s self-conscious pride for his own ethnic heritage or nostalgia for the Motherland which the playwright had never been to but had known by listening to his parents. In this respect, Harrigan’s Irish character embodies the playwright’s diaspora identity. This paper, by reading Harrigan’s The Mulligan Guard Ball (1897), explores the process in which Irish character types in the play embody Irish-American identity and reshape it into a bias-free Irish ethnicity, successfully avoiding the trap of ‘whiteface’ stereotypes. To this end, this paper especially focuses on the theme of ‘Irish Memory’: how the Irish Memory to be reflected in the formation of Irish character types; how the Irish Memory to be merged into the Irish-American identity which is implied and expressed out by the Irish character types. This paper is expected to widen and deepen the study of the theme by locating it in the late 19C American environment and by discussing the Irish Memory theme in terms of ‘aboriginality’ and ‘diaspora’ experience, differentiating itself from the existing practices in which the Irish Memory theme is regarded as an exclusive possession of modern time and, therefore, is exhausted in the study of 20C modern Irish dramas including Brian Friel’s.

정치적 논란에서 상업적 성공으로 : 『옥토룬』에서 표출되는 부시코트의 “정치성” Dion Boucicault`s “Politics” in The Octoroon

박정만 ( Jung Man Park ) 한국아메리카학회 2007 美國學論集 Vol.39 No.3

고결, 야만, 그리고 사라짐: 『메타모라』에 나타난 인디언 캐릭터와 미국 정체성

박정만 ( Jung Man Park ) 한국아메리카학회 2013 美國學論集 Vol.45 No.3

“The noble savage” is one of the important motives in the early American literature. Referring to the Native Americans, more familiarly known as American Indians, the term reflects the contemporary white`s romantic gaze upon these so-called red-skin pagan tribesmen. The term also reflects the contemporary social needs to establish genuine and authentic identity of the US as distinct from British one, after the independence from the motherland. John Augustus Stone`s 1829 play Metamora is the representative reflection on the white`s romantic gaze upon the American Indians as well as their literary response to the social needs for the American tradition and national identity. This paper traces the process in which the positive images of the protagonist Metamora, meeting a sudden turn in the middle, are portrayed as negative in the second half, and the Indian chief eventually dies disappearing into history. This paper explores the following issues: the author`s intention to romanticize the Indian chief as the model of proto-American virtue and finally dispose him in the end; the implication of his disappearance in terms of the social needs and justification for American national identity; the collective emotions of the US citizens, related to the issue of national identity, as implied by the author`s literary choice and solution in the play.

제임스 헌의 ‘진실을 위한 예술’론과 휴머니즘 : Margaret Fleming에서의 사회적 혼혈 이슈와 여성 문제

박정만(Park Jungman) 한국현대영미드라마학회 2009 현대영미드라마 Vol.22 No.2

James A. Herne’s 1897 manifesto of ‘Art for Truth’s Sake’ was a revolt against the practice of contemporary American play-writing and stage production which was dominated by the popular genre of melodrama and spectacular extravaganzas in the stage business. Indicating that the existing melodrama and farce genres failed at reflecting the true human condition, Herne voiced that the higher purpose of drama is to expose social injustice so that the general public open their eyes to some large truth of life. Herne’s principle of ‘Art for Truth’s Sake’ is regarded as embodying the transition from the old convention of mindless melodrama and frivolous farce to a new tradition of realism and drama of ideas. Herne’s influence on American drama and theatre is often compared to that of European dramatist Henrik Ibsen, and in this respect Herne is even called the American Ibsen. Herne’s 1890 play Margaret Fleming is regarded as the best dramatic realization of the ‘Art for Truth’s Sake’ principle. What is worth noting is that the ‘Art for Truth’s Sake’ principle is fundamentally rooted in Herne’s deep sense of universal humanism, which is resonant in the author’s attitude toward dealing with the issues of the social mulatto and women question in Margaret Fleming. In the play, Herne exhibits his sympathy for the socially weak, especially the illegitimate children of the mixed-class and the general women in the patriarchal society. Meanwhile, Herne shows a sophisticated sense of reality by dealing with the issue of mulattoness as a complicated problem of social identity rather than just as a racial issue. In addition, Herne shows a modern perspective on the roles of women by presenting a female character who takes the initiative in judging her husband’s marital infidelity, managing the family business during her husband’s absence, and eventually suturing the breakdown of family bonds. Related to this, Margaret, the heroine of the play, appears as a new woman who is even differentiated from Nora, the representative radical woman character in literature until that time. Likewise, Herne shows both modern sensibility and originality in striking out at unequal standards and unjust system from a humanistic perspective, capturing some large truth out of this, and finally weaving the captured truth into a form of art.

백인이 본 차이나타운, 차이나타운이 본 미국: 사실주의 극 『장남』에 비친 중국계 이민자의 삶과 문제의식

박정만 ( Jungman Park ) 한국아메리카학회 2016 美國學論集 Vol.48 No.1

The First Born (1897) dramatizes the everyday life of Chinese immigrants in Chinatown, San Francisco, in the late 19th century. This play significantly becomes a piece of evidence to prove that at that time there was occurring an indigenous and serious realism drama in American, when melodrama was dominating genre of drama and theatre convention. A series of discoveries in the play-the author’s stance as an acute observer; depiction of Chinese immigrants not as a type but as an individual; suggestion of the social problems within the community, etc.;-prove the play’s quality as a serious realism drama. The play also touches on the changed social position and status of the contemporary Chinese immigrants along with their mature conscious of the society in reality, compared with the earlier days of immigration in the 1850s. Adding to the literary values, The First Born functions as a historio-cultural document to gauge American society’s sentiment on the Chinese question of the time, which should be an important part of US immigration history.