최대 엔트로피 부스팅 모델을 이용한 전치사 접속 모호성 해소

박성배(Seong-Bae Park),장병탁(Bung Taek Jang) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.2Ⅱ

Park과 Zhang 은 최대 엔트로피 모델(maximum entropy model)을 실제 자연언어 처리에 적용함에 있어서 나타날 수 있는 여러 가지 문제를 해결하기 위한 최대 엔트로피 모델(maximum entropy boosting model)을 제시하여 문서 단위화(text chunking)에 성공적으로 적용하였다. 최대 엔트로피 부스팅 모델을 쉬운 모델링과 높은 성능을 보이는 장점을 가지고 있다. 본 논문에서는 최대 엔트로피 부스팅 모델을 영어 전치사 접속 모호성 해소에 적용한다. Wall Street Journal 말뭉치에 대한 실험 결과, 아주 작은 노력을 들였음에도 84.3%의 성능을 보여 지금까지 알려진 최고의 성능과 비슷한 결과를 보였다.

Analysis of Genetic Diversity of Korean Wheat Cultivars Using Microsatellite DNA Polymorphisms

Park,Yong-Jin,Cho,Gyu-Taek,Ma,Kyung-Ho,Lee,Sok-Young,Lee,Jung-Ro,Kim,Young-Chang,Cho,Eun-Gi,Kim Chang-Yung,Nam,Jung-Hyun,Rao,V,Ramanatha,Kang,Hee-Kyoung 한국자원식물학회 2004 Plant Resources Vol.7 No.2

Genetic background and phylogenetic relationships among 20 Korean wheat cultivars were assessed using microsatellites after amplifying with 13 SSR primer pairs. Average allele number per primer pair was 3.36. Genetic similarities for every pair of cultivars ranged from 0.42 to 0.97, with 0.69 of overall average. Korean cultivars were divided into two major groups based on microsatellite DNA polymorphisms. Group I consisted of relatively old cultivars developed until 1970s, and group II contained the recent cultivars developed during 1980s and 1990s. Amongst old elite cultivars/lines, ‘Yukseung 3’, ‘Norin 12’ and ‘Norin 72’ contributed most to the genetic background of cultivars belonging to group I, and ‘Norin 4’, ‘Norin 12’, ‘Norin 43’ and ‘Norin 72’ to group II, respectively. The phylogenetic relationship of Korean wheat cultivars was in accordance with the genealogical data of each cultivar. The genetic background of each cultivar was assessed from the point of breeding and germplasm management such as variety identification and duplicated accessions for assisting in developing a system for the registration of new variety based on the molecular characterization in future.

김환기의 백자 항아리그림과 『문장』지의 상고주의 : 야나기 무네요시와 이태준의 영향을 중심으로

박영태(Park Young-Taek) 우리문학회 2010 우리文學硏究 Vol.0 No.30

김환기는 이중섭, 박수근과 함께 한국적인 정서를 독자적 조형어법으로 구현시킨 대표적 화가로 손꼽힌다. 전통미술에 대한 애착과 한국 고유의 정서에 뛰어난 감각을 지녔다고 알려진 그는 한국적인 것, 한국의 아름다움을 가장 잘 이해하고 사랑한 화가, 한국적 풍류와 정취를 지닌이로 평가되고 있다. 해방 이후부터 미국으로 건너가기(1945∼1963)전까지 김환기는 주로 백자항아리를 그려왔다. 그에게 조선 백자는 과거의 정신적 유산으로서 그 정점에 서 있었다. 1930년대에 김환기를 비롯한 많은 화가와 문인들은 서로 긴밀하게 연관되어 영향을 주고 받았다. 김환기는 당대 상고주의자들인 김용준, 이태준 등과 어울리면서 조선 고전예술에 심취했는데 이때 조선백자에 관심을 갖기 시작한 것으로 보인다. 한편으로는 당대 지식인들에게 커다란 영향을 끼쳤던 야나기 무네요시의 조선민예미와 백자에 대한 논의 역시 핵심적인 역할을 했다고 보여진다. 특히 『문장』지의 이태준과의 교우관계는 결정적이었다. 김환기는 이태준으로부터 조선 전통미술(특히 조선백자 및 사대부 문화)에 대한 깊은 이해를 제공받았으며 당시 조선의 그림이 무엇이어야 하는가를 제시받았다. 이에 따라 김환기는 일본을 통해 받아들인 모더니즘의 틀 안에 조선 미술의 미의식을 결합시켜내는 것을 자신의 예술의 과제로 삼았고 그것이 진정한 의미에서 한국적인 서양화, 한국적 모더니즘이라고 생각했다. 조선백자를 전통적인 한국미 혹은 동양예술의 정수로 이해하고 받아들인 것은 비단 김환기만은 아니었다. 1930년대 중반 이후 상당수 작가들이 백자를 소재로 해서 그리기 시작했고 그것을 가장 한국적인 아름다움과 멋으로 이해하고 있었는데 해방 이후 민족의 정통성을 강조하는 사회 분위기 속에서 조선 백자는 전통적 가치를 지니는 고전으로 승격되어 오늘에 이르게 되었다. 그것은 일찍이 야나기 무네요시의 영향과 『문장』지, 그리고 이태준과 김환기의 관계 속에서 자리잡았던 것이 사실이다. 야니기 무네요시의 논의와 1930년대 『문장』이 이끈 전통논의는 일제식민지 시기 조선미술에 대한 새로운 인식과 중요성을 환기시키고 나아가 민족미술의 구현에 공헌한 바 있지만 한국미와 이의 현대화란 문제를 백자로만 제한시켜 소재주의화하거나 전통을 박제화 시키는 아쉬움을 남긴 것도 사실이다. Hwan Ki Kim is considered one of the vanguards that translated the Korean sentiments into formative arts in its most original styles together with Joong Seob Lee and Soo Keun Park. The white porcelains from Chosun Dynasty stands on the zenith of mental legacy from the past for Hwan Ki Kim and it goes without saying that he tried to find the source of beauty and arts of Korea through this specific medium, the white porcelains the white porcelains from Chosun Dynasty were appreciated as the essence of the Korean and the oriental beauty by other painters as well. Quite a substantial number of painters started painting the white porcelains from mid-1930 and considered those paintings as the ones that best represent the artistic beauty and the style of Korea. This continues onto the modern times and in the history of Korean modern arts, white porcelains have been reincarnated as a representative of the Korean traditions and aesthetic senses. In the 1930’s, literary people and artists formed organic relationships and influenced each other artists were immensely influenced by the literary people mostly. In the same sense, it is not too much of assumption to state that the Korean modern arts developed in relations with the literary people of the time. Hwan Ki Kim was deeply immersed with classic arts of Chosun Dynasty along with other primitivists, such as Yong Joon Kim and Tae Joon Lee, and it is deemed that it was that period in which Hwan Ki Kim took interests in white porcelains of Chosun Dynasty. Escaping from the reality full of wars, division of the country, and anti-communism ideology, he secluded himself and found refuge in arts. Although both of his close companions, Tae Joon Lee and Yong Joon Kim, chose to flee to North Korea, he stayed poise and quiet, and never ceased to pursue the traditional aesthetics of the arts. Successively, he later chose to move to Paris and New York and focused on painting. Traditional painting of Chosun Dynasty, especially the white porcelains before anything, was the inspirations in Hwan Ki Kim’s artistic world and his major works include paintings that feature white porcelains. One of the big contributions to his oriental inspiration on Chosun arts can be found in the relationship with his close friends, Yong Joon Kim and Tae Joon Lee- especially, with Tae Joon Lee from magazine 〈Mun Jang〉. Hwan Ki Kim was provided with deeper understanding of the traditional paintings of Chosun Dynasty though his relationship with Tae Joon Lee and was advised to set straight what Chosun paintings should be. Hwan Ki Kim embarked on a task of incorporating the artistic values of Chosun Dynasty within the boundaries of modernism which arrived in Korea via Japan, and he regarded this process as a way of representing the Korean style of Western paintings, as well as Korean modernism. This task did not confine itself only to Hwan Ki Kim and provided a conclusive and logical background in defining the true Korean arts resulting from the transformation of traditional Korean arts into modernized one after the country was emancipated from Japanese colonization. This passed down to the current generations and currently remains viable still.

Polymorphism of Cefotaxime sodium

Sohn, Young-Taek,Park, Sun-Hee 덕성여자대학교 약학연구소 2005 藥學論文誌 Vol.16 No.1

Three crystal forms of cefotaxime sodium have been isolated by recrystallization and characterized by powder X-ray diffractometry, differential scanning calorimetry, and thermogravimetric analysis. The dissolution patterns of three crystal forms of cefotaxime sodium were studied in water at 37±0.5℃, 90rpm for 180 minutes. Three crystal forms of cefotaxime sodium showed difference in dissolution rate and solubility. After storage of two months at 52% RH (saturated solution of Na_(2)Cr_(2)O_(2).2H_(2)O / 20℃), all crystal forms showed no transformation.

대학 캠퍼스용 로봇차량의 자율주행을 위한 실험환경 구축

조성택(Sung Taek Cho),박영준(Young Jun Park),정슬(Seul Jung) 한국지능시스템학회 2016 한국지능시스템학회논문지 Vol.26 No.2

본 논문은 대학 캠퍼스를 주행하는 차량의 자율주행을 위한 실험환경 구축에 대해 논한다. 이 차량은 대학이나 공원과 같은 특별한 장소에서 사용되고 근거리를 이동하기 위해 2인이 탑승한다. 정문에서 본부까지 자율주행을 수행하기 위한 실험환경을 구축한다. 초기 단계로 카메라로 바닥의 색깔을 구별하여 선을 검출한다. 빨간색과 노란색의 경계선을 검출하여 로봇차량이 추종할 수 있도록 하였다. 일부 구간의 자율 주행 실험을 통해 가능성을 검증하였다. This paper presents the experimental setup for autonomous navigation of a robotic vehicle for touring university campus. The robotic vehicle is developed for navigation of specific areas such as university campus or play parks. The robotic vehicle can carry two passengers to travel short distances. For the robotic vehicle to navigate autonomously the specific distance from the main gate to the administrative building in the university, the experimental setup for SLAM is presented. As an initial step, a simple method of following the line detected by a single camera is implemented for the partial area. The central line on the pavement colored with two kinds, red and yellow, is detected by image processing, and the robotic vehicle is commanded to follow the line. Experimental studies are conducted to demonstrate the performance of navigation as a possible touring vehicle.

고차잉여류 문제에 기반을 둔 다중서명 방식

이보영(Lee Bo Young),박택진(Park Taek Jin),원동호(Won Dong Ho) 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.3

Itakura and Nakamura proposed the first multisignature scheme based on the RSA signature scheme. But if many users sign on one paper, then their scheme has a reblocking problem. In 1991, Ohta and Okamoto proposed a multisignature scheme by using Fiat-Shamir signature scheme. But in this scheme, the group of signers must generate common random number in the first round, and in the second round, they sign the message with common random number. Also L. Harn proposed a multisignature scheme which is based on the E1Gamal's. In korea, S.D.Kim et al. at ICEIC'95 conference, proposed an efficient sequential multisignature scheme by using the modified Park-Won scheme. This scheme is not require an additional round to generate common random number, and has fixed signature length. In this paper, we analyze problem of Kim's multisignature scheme, and propose a new multisignature scheme based on R(th-) residuosity problem.

火力發電設備의 材質經年劣化 評價를 위한 實驗的 硏究

朴昌彦,金熙奎,鄭澤龍 木浦大學校 工業技術硏究所 1991 工業技術硏究誌 Vol.1 No.-

For the reactor vessel of the fossil power plants and petrochemical plant operating under high temperature and high pressure, Cr-Mo steels are commonly used. Thus, it is important to predict the remaining service life of the structural component in order to avoid a serious damage in human life and economy, resulting from the unexpected failure of the component due to the temper embrittlement under the severe operating condition for a long period of time. Microstructural changes such as the formation in solute element zone precipitation and growth of coarse precipitates, segregation of impurities a grainboundary due to the long period of operation cause the changes in electrochemical such as corrosion resistance, etching characteristics, polarization characteristics and material properties such as material hardening, softening embrittlement, and physical properties such as electric resistance, inductance acoustic characteristics. Therefore, in order to evaluate the remaining service life of component in a nondestructive manner, grainboundary etching method(GEM) and small punch(SP) have been used. In this research, however, electrochemical polarization method was proposed to nondestructively evaluate the material degradation of the structural component by using a currentpotential curve that can be determinaed from an electrochemical polarization experiment. Comparison of the current density obtained from the electrochemical polarization method and the shift in FATT(Fracture Appearance Transition Temperature) from the Charpy V-notch test and the Shift in DBTT(Ductile Brittlement Transition temperature) from the small punch test and surface roughness of grain from chemical etching test was mace to find correlation between them. The results are summarized as follows : Electrochemical polarization method showed a clear difference in minimum current density(Ir) according td the degree of material degradation. There is a nice correlation between the minimum current density from the EPR and (△FATT)cvn from CVN test. A good relationship of current density and (△DBTT)sp from the SP test was found in Cr-Mo steel. There is good relationship between the degree of material degradation and surface roughness of GEM. The GEM was successfully used as a non-destructive evaluation method of material degradation, compared to the SP and EPR test.

음향방사로 인한 주기구조물에의 모우드 해석

박상기,임경택,이동하,김택현,김종태 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.2

In this study, the mode shape of infinite fluid loaded plate is examined. The stiffeners are assumed to be equally spaced and exert only force on the Plate. The response of a fluid loaded ㄷ-type stiffened plate to a convected harmonic pressure and the far field radiation Produced by a point force excitation have been found by using Fourier transforms, a method which is particularly useful when fluid loading is included. At low and high frequencies the far field Pressure for a point excited stiffened plate is dominated by the fluid properties and the properties of the plate at the point of excitation. Mode in the far field pressure is found at the given direction of scattering frequencies, and in these frequencies the stationary phase wave frequencies are found to coincide with the free wave propagation constants for the stiffened plate. Also, the variation in the modes of the sound pressure level is increased with the increases of the bay space and in the bay area

고성능 액체 크로마토그래피에 의한 Costus speciosus중 Diosgenin의 분석법

朴奎昌,金宅濟 慶熙大學校 1985 論文集 Vol.14 No.-

Diosgenin in Costus specious was analysed by high-performance liquid chromatographic (HPLC) Technique. The dried, powdered sample was refluxed with the mixed solution of 3N HCl and xylene (1:1) at 95-100℃ for 4 hours. The residue obtained from the xylene layer was acetylated and then injected into HPLC. HPLC was performed using a set of four of the reversed-phase column (30㎝×3.9㎜ i.d., μ-Bondapak C_18, 10㎛) Connected in series. The solvent system was tetrahydrofuran - n - hexane-acetonitrile (1:2:7). Au UV detector was used at a wavelenght of 210㎚.

여행업의 브랜드이미지 평가요인에 관한 연구

박철호,안택균 문화관광연구학회 2000 문화관광연구 Vol.2 No.1

The purpose of this study is to establish a brand-image differentiation strategy in the travel industry through examining the difference between brand-image preference in travel enterprises and evaluation factor in the travel industry. First of all, factor analysis is done with 13 factors to find out brand-image evaluation factor in the travel industry and consequently, 13 brand-image evaluation factors are classified into 4 factors.(easiness, preference , differentiation, product-relation) There are significant differences according to the demographic characteristics such as gender, age, income, education as a result of the factor analysis with these 4 factors on brand-image evaluation factor in the travel industry. The marketers who deal with travel marketing must make an effort developing better brand-image to avoid similarity from other travel products perceived by customers and to make better customer preferences.