Characterizing Particulate Matter at Baeng-Yeong Island, Korea, with a High Resolution Time of Flight Aerosol Mass Spectrometer

Taehyoung Lee,JinSoo Park,SeokJo Lee,JongChoon Kim,Sungki Jang,DongWon Lee,JoonYoung Ahn,HaEun Jeon,GangWoong Lee,Jeffrey L. Collett 한국대기환경학회 2011 한국대기환경학회 학술대회논문집 Vol.2011 No.5월

AlxGa₁-xAs / AlAs / GaAs계로 이루어진 비대칭 이중 양자우물 구조에서의 광 Luminescence 특성 연구

정태형(Taehyoung Zyung),강태종(Tai-Jong Kang),이종태(Seon-Kyu Han),한선규(Jong-Tai Lee),유병수(Byueng-Su Yoo),이해권(Hae-Kwon Lee),이정희(Jung-Hee Lee),이민영(Min-Yung Lee),김동호(Dong-Ho Kim),임영안(Young-Ahn Leem),우종천(Jong-Chun 한국광학회 1992 한국광학회지 Vol.3 No.3

AlxGa_(1-x)As/AlAs/GaAs계로 이루어진 비대칭 이중 양자우물 구조의 광학적 특성을 photoluminescence, photoluminescence excitation, time-resolved photoluminescence를 통하여 조사하였다. 양자장벽 AlAs의 두께에 따른 특성 변화를 조사하기 위하여 두께를 15Å, 150Å로 제작하였다. 양자장벽이 15Å인 경우 매우 빠른 전자의 관통 현상을 보여 주었으며, 이로 인해 AlxGa_(1-x)As의 여기자 재결합에 해당하는 피크가 관찰되지 않았다. AlAs 양자장벽이 150Å인 경우에는 AlxGa_(1-x)As 양자우물에서 여기자 재결합에 의한 피크가 50 ㎰ 이하로 빠른 decay 시간을 보여 주었으며 이것은 양자장벽과의 Γ-X전이에 의한 것으로 사료되었다. GaAs 양자우물에서의 luminescence decay는 두 시료 모두 1 ㎱정도 이었으나, 15Å인 경우에는 약 100 ㎰의 rise 시간이 존재하였으며 이것은 정공의 관통에 의한 시간으로 판명되었다. Luminescence properties of asymmetric double quantum well structure composed of AlxGa_(1-x)As/AlAs/GaAs have been studied by steady state and time-resolved photoluminescence and phtoluminescence excitation spectroscopy at low temperature. Two quantum well samples with different barrier thickness (15Å and 15Å) were prepared to investigate the dependence of tunneling characteristics on barrier thickness. The abscence of excitonic recombination peak from AlxGa_(1-x)As wen for the 15Å barrier sample indicates a very fast electron tunneling to GaAs well. Meanwhile, Γ-X transition between wen and barrier is supposed to be a major route for the fast decay of luminescence from AlxGa_(1-x)As wen in the 150Å barrier sample. Time-resolved photoluminescence from GaAs wen of 15Å sample shows the exsitence of the rise with 100 ps which is attributed to the hole tunneling.

Characterization of Aerosol Composition, Concentrations, and Sources at Baeong-Yeong Island, Korea using an Aerosol Mass Spectrometer and Proton transfer Reaction Mass Spectrometer

Taehyoung Lee,JoonYoung Ahn,JinSoo Park,Gangwoong Lee 한국대기환경학회 2013 한국대기환경학회 학술대회논문집 Vol.2013 No.8

[SESSION 2C 지구환경(Ⅱ)(배경농도)]2C4) Continuous Measurement of Aerosol lonic Composition during Yosemite National Park Special Study (2002), Special Nitrate Study (2003-2004), and Fresno Fog Study (2003-2004)

Taehyoung Lee,Xiao-Ying Yu,Benjamin Ayres,Jacqueline Carrillo 한국대기환경학회 2004 한국대기환경학회 학술대회논문집 Vol.- No.-

Novel Method for Combining Flexible Organic Light-Emitting Diodes with Organic Thin-Film Transistors

Taehyoung Zyung,Hye Yong Chu,Jeong-Ik Lee,Ji Young Oh,Jung Hun Lee,Sang Chul Lim,Seong Hyun Kim 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.I

We present a new method of driving an organic light-emitting diode (OLED) with an organic thin-film transistor (OTFT). The OTFT and the OLED were fabricated on separate plastic substrates and both devices were laminated with silver paste. After driving a 2 × 2 mm2 OLED with an OTFT device, we obtained 180 cd/m2 at a current density of 5 mA/cm2 from the green OLED by using an OTFT with mobility, on-off ratio, threshold voltage, and subthreshold slope of 0.21 cm2/V·s, 103, 32 V, and 20 V/decade, respectively.

Characterizing Smoke Properties from Biomass Combustion using a High Resolution Time of Flight Aerosol Mass Spectrometer

Taehyoung Lee,Sonia M. Kreidenweis,Jeffrey L. Collett,Amy Sullivan,Christian Carrico,Jose L. Jimenez,Doug Worsnop,Timothy B. Onasch,Ed Fortner,William Malm,Emily Lincoln,Cyle Wold,Wei Min Hao 한국대기환경학회 2011 한국대기환경학회 학술대회논문집 Vol.2011 No.5월

Synthesis and phase transition behavior of well-defined Poly(arylene ether sulfone)s by chain growth condensation polymerization in organic media

Lee, Jinhee,Lee, Byungyong,Park, Jeyoung,Oh, Jaehoon,Kim, Taehyoung,Seo, Myungeun,Kim, Sang Youl Elsevier 2018 Polymer Vol.153 No.-

<P><B>Abstract</B></P> <P>A series of well-defined poly(arylene ether sulfone)s (PESs) as a rod-type block was synthesized by chain-growth condensation polymerization from a diphenyl sulfone-type initiator containing a fluorine leaving group and an allyl moiety. Interestingly, these oligomeric PESs exhibited lower critical solution temperature (LCST)-type phase transition behavior in organic solvents, i.e., 1,2-dimethoxyethane (DME) and chloroform. The clouding point temperature was affected by the molecular weight and concentration of the polymers. The cloud temperature decreased as the molecular weight polymers and the concentration of polymer solution increased. And also two series of rod-coil type poly(arylene ether sulfone)-<I>b</I>-polylactides were synthesized by controlled ring-opening esterification polymerization of <SMALL>DL</SMALL>-lactide with a PES-derived macroinitiator in which the allyl group was transformed into an aliphatic hydroxyl group by a thiol-ene click reaction. These diblock copolymers also exhibited LCST behavior in DME, and the nanoscale size of the aggregates increased upon heating.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Well-controlled rod-type poly(ethersulfone)s were synthesized. </LI> <LI> The poly(ethersulfone)s exhibited thermos-responsive properties in organic solvents. </LI> <LI> This phase transition behavior was also observed with diblock copolymers. </LI> <LI> Their cloud points were affected by the molecular weight and the concentration. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Light-emitting devices with polymer-organic heterostructure

Do, Lee-Mi,Hwang, Do-Hoon,Choi, Kang-Hoon,Lee, Hyang-Mok,Jung, Sang-Don,Zyung, Taehyoung Optical Society of Korea 1997 Current Optics and Photonics Vol.1 No.2

Highly quantum efficient and multi-color emissible polymer light emitting devices have been realized utilizing poly (1-dodecyloxy-4-methyl-1, 3-phenylene)(2, 5"-terthienylene)(hereafter, mPTTh polymer) as an emitting layer and tris(8-hydroxyquinoline) aluminum (Alq3) as an electron transport layer. A single layer EL device of mPTTh polymer emits orange-colored light. EL efficiency increases as the thickness of Alq3 layer increases, but the emission color becomes visually broad when the Alq3 layer thickness is greater than 30nm since the relative peak intensity of green EL from Alq3 layer grows. EL color is changed from orange to greenish orange as the thickness of Alq3 layer grows. EL color is changed from orange to greenish orange as the thickness of Alq3 layer increases. EL efficiency of the double layer device was greatly enhanced by 3000 times compared with that of a single layer device. Alq3 layer in device acts as a hole blocking electron transporting layer and an emitting layer as a function of the thickness of Alq3 layer.ayer.

중국 호방사(豪放詞)에 나타난 문화지리적 원류 고찰

이태형(Lee Taehyoung) 부경대학교 인문사회과학연구소 2017 인문사회과학연구 Vol.18 No.1

중국 중당시기 문인사와 당시 민간의 곡자사로부터 북송대 문인사에 이르기까지 호방 성격의 풍격을 지닌 사의 경향성을 정리하면 다음과 같다. 중당 민간곡자사는 돈황일대에서 유행된 민간가사로서 일찍이 초.성당에, 늦게는 당말에서 오대에 이르 기까지 비교적 오랜 시간에 걸쳐 불려졌던 노래들이다. 민간인들은 자연에 어울려살면서 평소 매일 바라보는 자연경물을 소재로 하여 담백한 어조로 淸新하고 曠達풍격의 호방사를 많이 지었다. 특히 돈황변새사에는 전쟁이나 변새지역의 풍광을 소재로 삼아 애국적인 주제를 담은 豪放하고 豪邁한 기상이 잘 나타나 있다. 晩唐五代는 정국의 불안과 사회의 동요로 인하여 지식인들이 사회문제를 외면하고 일시적 쾌락을 추구하게 되었으며 문학도 자신들의 그러한 생활을 위한 봉사자로 활용되었 다. 이른바 화간사풍이라 불리는 그 시대 특유의 완약사풍이 발전하였고 상대적으로 호방사풍은 쇠미했다. 북송대는 경제적 번영과 정치적 안정으로 인해 사는 차츰 작가와 작품의 수가 늘어났다. 송대 문인들은 완약적인 서정에 편중하는 사를 지으면서도그들이 자신의 사를 배척하는 이중성을 지녔다. 소식은 사를 유희적 수단으로 내용이없는 사로 짓는 것을 각성하고 내용상의 혁신을 이루었다. 이로 인하여 사의 제재와 내용이 다양해져서 호방사가 발전하였다. 종합하면, 사는 완약풍격으로부터 출발한것이 아니라 완약풍격과 호방풍격을 함께 끌고 안고 출발했으니 사가 애당초부터 어떤 종류의 감정이라든지 다 토로할 수 있는 서정시로서의 기능을 가지고 있었음을의미한다. 다만 지식인들의 손으로 들어간 후로는 균질화 내지 단순화된 작자의 경험세계와 그들이 처한 시대적 상황에 따라 사의 서정적 기능이 축소되기도 하고 확장되기도 했다. Bold and unconstrained belongs to aesthetic category with unique connotation and the national characters in the Chinese traditional culture and esthetics, reflecting one kind of positive vigorous aesthetic consciousness and holding an important position in humanities and the field of the literary arts of the Chinese ancient times. for example, Middle Dang Dynasty Li Bai and Su Shi have long been regarded in their respective dynasty as the representatives of school of heroic abandon. Li and Su represented the spirit of their times and the highest cultural level of their respective dynasty, but because of differences of the social and cultural environment. the Northern Song Dynasty poet uninhibited word is written into the blood and become a spiritual history, with its bold and unrestrained aesthetic style into life with emotion. In this paper the bold word development as the key link, in order to reveal the bold word development process and characteristics. specially, in the early Northern Song Dynasty Ci to occupy an important place in the Yan Shu, Fan Zhongyan, Liu Yong, so on. the northern song dynasty boldand unconstrained word development. Based on the present situation of internal and external recounted the middle society, and the wind stand-up word wind and the new changes. Su Shi’s bold word, make clear its int he Northern Song Dynasty’ s bold and unconstrained word history and contributions. HeZhu and HuangTingjian bold and unconstrained word screation, give them a clear positioning, perfect bold and unconstrained words in the late Northern Song Dynasty Development and Rheological.

구한말 郭鍾錫의 詞 역주

이태형(Lee Taehyoung),김민정(Kim Minjung) 부경대학교 인문사회과학연구소 2020 인문사회과학연구 Vol.21 No.3

곽종석(郭鍾錫)은 조선말기부터 일제강점기에 살았던 유학자이자 문인이다. 그의 사작품은 한국 역사에서 가장 암울했던 경술국치의 시기에 국가와 사회에 충만해 있던 위기감과 우려감이 자연스럽게 스며들어가 있다. 우국충정의 마음, 세상살이의 험난함, 개인의 불행한 처지 등을 담당하게 읊조리고 있다. 그의 사작품은 총16수인데 제재별로 크게 4가지 유형으로 나눌 수 있다. 첫째, 어느 한 자연풍광이나 사물을 대상으로 삼아 그 내적, 외적 특징을 묘사하면서 그 속에 작가가 느꼈던 정서를 기탁한 영물사(詠物詞)가 있다. 둘째, 구한말 일제에 나라를 빼앗긴 시대적 아픔과 가슴 속에 맺힌 한스러움과 온갖 인생역정 속에서 내적인 감회를 표현한 영회사(詠懷詞)가 있다. 셋째, 은거하면서 자신의 마음을 고요히 다스리고 산수를 찾아 심신을 정화하면서 은일의 서정을 토로하였고, 자연을 마주하여 물아일체의 심정을 느끼고 일상생활을 담담하게 읊어낸 은일사(隱逸詞)가 있다. 넷째, 사회생활 속에서 친구나 사제간의 교류를 통하여 인간관계를 돈독히 하고, 우정과 공경과 사랑의 마음을 담아 쓴 교유사(交游詞)가 있다. 곽중석 사작의 특징을 요약해보면, 詞를 詩처럼 인식하여 일상적으로 접할 수 있는 자연경물과 주변의 소재를 통하여 촉발된 감정을 자연스럽고 평이하게 표현한 점, 당시 구한말의 암울했던 시대현실을 자각하고 구국 활동을 하면서 느낀 애국사상을 사에 은근하게 담아 표현했다는 점을 들 수 있겠다. This paper reverses the 16th number of Ci Poetry works by Kwak Jong-seok at the end of the Joseon Dynasty. In summary, the four types of sanctions are divided into four types based on the company s central sanctions. First, there is Yeongmul-Ci Poetry, which donated the emotions the writer felt while describing the inner and outer characteristics of a natural scenery or object. Second, there is Younghoei-Ci Poetry, which expresses the pain of the times when the country was lost to the Japanese at the end of the Joseon Dynasty, the sorrow in the heart, and the inner feelings in all kinds of life journeys. Third, while living in seclusion, he calmly controlled his mind and body, visited Sansu, and purified his mind and body, and expressed the lyric of Eunil-Ci Poetry, who expressed the emotions of Eunil and calmly recited his daily life in the face of nature. Fourth, there is Kyoyu-Ci Poetry a history of friendship, respect, and love in social life that strengthens human relations through exchanges between friends and priests. As such, Kwak s private works are very colorful. He donated his noble character and orphaned spirit to the relics, and prayed for his longing for his friends, repentance and blessing while exchanging gifts with his friends and colleagues. He also sang lightly what happened in his daily life, and described the joy of living in seclusion that was free from the world. Gwak Jung-seok s two characteristics include the natural and easy expression of the emotions triggered by the natural scenery and surrounding materials that can be encountered in everyday life by recognizing the grim realities of the late Joseon Dynasty and the patriotic thoughts he felt during his country s activities to regain the lost country.