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미세구조가 제어된 전해도금 Cu₂O 광양극의 광전기화학 특성
정다솔(Dasol Jeong),조우현(Woohyeon Jo),정재범(Jaebum Jeong),정현성(Hyunsung Jung) 한국표면공학회 2020 한국표면공학회지 Vol.53 No.5
Cu₂O films as a photocathode for photoelectrochemical water splitting were potentiostatically deposited on FTO glasses. The morphology and composition of the electrodeposited Cu₂O films were adjusted by the applied potentials. The potential-dependent grain size of Cu₂O films was characterized by XRD and SEM analysis. Photoelectrochemical properties of the fabricated Cu₂O photocathodes were investigated with photocurrents as a function of potentials under 1 sun condition of 100mW/cm². Photocurrents of the electrodeposited Cu₂O films were controlled with the tailored surface morphologies of Cu₂O photocathodes.
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김윤정(Yunjung Kim),정재범(Jaebum Jeong),남기춘(Kichun Nam) 한국언어청각임상학회 2001 Communication Sciences and Disorders Vol.5 No.2
용언은 그 어간이 여러 문법소와 결합하면서 자동적 음운변동이 일어나는 경우를 제외하고 형태변동이 있는가, 없는가에 의해 전통적으로 규칙용언과 불규칙용언으로 구분하였다. 활용함에 따라 형태변동이 수반되는 불규칙용언과 규칙용언은 심성어휘집에 어떤 형태로 저장되어 있는지를 조사하는 것이 본 연구의 목적이다. 이를 위해 이해성실어증 환자 한 명과 음어적실행증 현상을 동반한 경미한 정도의 실어증 환자를 피험자로 하였다. 실험과제는 단어채워넣기과제를 사용하였다. 즉 주어진 기본형 용언을 검사문장의 문맥에 맞게 활용하여 채워 넣는 것이다. 실험결과에 의하면 환자들은 규칙용언의 활용(예, 먹다/ 먹는)과 불규칙용언 중 형태를 유지한 채로 활용하는 경우(예, 줍다/ 줍고)에는 거의 오류가 없었으나, 불규칙용언이 형태변화를 겪어야 할 경우(예, 줍다/ 주워)에는 대부분 오류를 보였다. 또 이때는 기본형을 그대로 유지하는 오류 방향성을 관찰할 수 있었다. 이는 그간 문법적으로 구분되어 오던 규칙용언/ 불규칙용언의 구분보다는 형태유지/ 형태변화 정보처리의 영향이 크다는 것을 알 수 있다. 특히 이해성실어증 환자는 전체적인 오류율이 매우 높았는데, 규칙용언의 경우에도 오류를 보였다. 이때, 용언의 어간에 해당하는 부분에는 오류가 없고, 뒤에 따르는 내용과의 관계를 파악해야 하는 문법기능소, 즉 연결어미에서 오류를 보여 정보의 유지 및 통합에 문제가 있다는 기존의 연구와도 일치하는 결과를 나타냈다. The purpose of the present study was to examine whether Korean regular and irregular verbals are differently represented in the mental lexicon. Two aphasic patient s participated in this study as subject s. In order to examine the sentence generation processing, the sentence completion task was employed. The basic form of the Korean verbals were presented at the top of the experimental sentences, and the patient s were asked to conjugate the basic forms to be appropriate for the blank given in the experimental sentences. If the Korean regular verbs and adverbs have different lexical representation format s in the mental lexicon from the irregular verbals, it is expected that the patient s would produce different patterns of conjugation error s between the regular and irregular verbals. However , if the regular and irregular verbals are represented in the similar way, then the conjugation error patterns will be similar . It was found that the patient s made many error s in conjugating the irregular verbals only when conjugation involves the root form change, whereas patient s made a few error s in conjugating the regular words and irregular words not involving root form change, regardless of conjugation regularity. And the conjugation error s shown in the irregular verbals involving the root form change occurred due to the tendency to keep the root form in the unchanged form. This result implicates that Korean regular and irregular verbs and adverbs are represented similarly in the mental lexicon and the categorical separation between the regular and irregular words can be decided depending on whether the root (or word stem) form changes or not.
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잉크젯 프린팅 기술을 이용한 Ag 전극 균일성 및 발열 센서 연구
김건웅 ( Gun Woong Kim ),정재범 ( Jaebum Jeong ),박진호 ( Jin Ho Park ),정우진 ( Woo Jin Jeong ),김준영 ( Jun Young Kim ) 한국센서학회 2024 센서학회지 Vol.33 No.1
Inkjet printing technology is used to mass-produce displays and electrochemical sensors by dropping tens of pico-liters or less of specific-purpose ink through nozzles, just as ink is sprayed and printed on paper. Unlike the deposition method for vaporizing material in a vacuum, inkjet printing technology can be used for processing even under general atmospheric pressure and has a cost advantage because the material is dissolved in a solvent and used in the form of ink. In addition, because it can only be printed on the desired part, masks are not required. However, a technical shortcoming is the difficulty for commercialization, such as uniformity for forming the thickness and coffee ring effect. As sizes of devices decrease, the need to print electrodes with precision, thinness, and uniformity increases. In this study, we improved the printing and processing conditions to form a homogeneous electrode using Ag ink (DGP-45LT-15C) and applied this for patterning to fabricate a heat sensor. Upon the application of voltage to the heat sensor, the model with an extended width exhibited superior heat performance. However, in terms of sheet resistance, the model yielded an equivalent value of 21.6 Ω/□ compared to the ITO.
ScienceON
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