• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.549-552
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• 1998

Recently, the gate oxide damage induced by the plasma processes has been one of the most significant reliability issues as the gate oxide thickness falls below 10 nm. The process-induced damage was studied with the metal antenna test structures. In addition to the electron trapping, the hole trapping in a 10 nm thick gate oxide due to the plasma-induced charging was observed in the NMOS's with a metal antenna. The hole trapping gave rise to the decrease of the transconductance (gm) similarly to the case of the electron trapping, but to the extent much less than the electron trapping. It would be because the electrical stress that the plasma-induced charging forced to the gate oxide for the devices with the hole trapping was much smaller than for those with the electron trapping. This hypothesis was strongly supported by the measured characteristics of the Fowler-Nordheim current in the gate oxide.

• 한국항공우주학회지
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• 제36권10호
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• pp.1003-1010
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• 2008

본 논문은 RLG의 신호처리 기법인 Trapping 기법 적용시 각속도와 가속도의 측정시점 불일치에 의해 발생되는 오차를 보상하는 기법에 관한 연구이다. RLG의 대표적인 신호처리 기법인 Stripping 신호처리 기법과 Trapping 신호처리 기법에 대하여 각 기법의 오차요인을 분석하고 이에 대한 모델링을 수행하였다. 그리고 Trapping 기법 적용시 각속도와 가속도 측정시점 불일치에 의해 발생되는 오차에 대한 모델링을 통하여 항법오차에 미치는 영향을 분석하였으며 이를 감소시키기 위한 새로운 신호처리 기법을 제안하고 시뮬레이션 및 시험을 통하여 이에 대한 성능분석 결과를 제시하였다. 성능 분석결과 본 논문에서 제시한 신호처리 기법이 기존의 방법에 비하여 항법오차를 크게 감소시키는 것을 확인할 수 있었다.

• Corrosion Science and Technology
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• 제2권3호
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• pp.109-116
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• 2003

It is well known that SSCC (sulfide stress corrosion cracking) is caused by drastic ingression of hydrogen during the service and accumulation of hydrogen near the potential crack initiation site in the material. It is important to characterize the hydrogen trapping behavior to evaluate the service performance of the high strength pipeline steels. In this study. the relationship between the hydrogen trapping behavior and SSCC susceptibility is evaluated in terms of alloy composition, microstructure and carbide behavior. The hydrogen trapping behavior was measured by electrochemical hydrogen permeation test cell (Devanathan cell). The SSCC susceptibility is evaluated by constant extension rate test and constant strain lest method. The hydrogen trapping behavior is affected greatly by microstructure and nature of carbide particles. The fine TiC, and NbC in the matrix of ferritic structure acts as strong irreversible trap sites whereas the bainitic structure acts as reversible trap site. The SSCC susceptibility is closely related to not only the hydrogen trapping behavior but also the loading condition. As the activity of reversible trap site increases, SSCC susceptibility decreases under static loading condition below yield strength, whereas SSCC susceptibility increases under dynamic loading condition or above yield strength. As the activity of irreversible trap site increases. SSCC susceptibility increases regardless of loading condition. It is cased by the mixed effect of dislocation on hydrogen diffusion and trapping behavior.

• Advances in nano research
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• 제13권1호
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• pp.1-12
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• 2022

The existence of active material in the environment causes the small-scale systems to be sensitive to the actual environment. Carbon dioxide is one of the active materials that exists a lot in the air conditions of the living environment. However, in some applications, the carbon dioxide-coated is used to improve the performance of systems against the destructive factors such as the corrosion; nevertheless, in the current research, the stability analysis of a carbon dioxide capture mechanism-coated beam is investigated according to the mathematical simulation of a rectangular composite beam utilizing the modified couple stress theory. The composite mechanism of carbon dioxide trapping is made of a polyacrylonitrile substrate that supports a cross-link polydimethylsiloxane gutter layer as the carbon dioxide mechanism trapping. Three novel types of carbon dioxide trapping mechanism involving methacrylate, poly (ethylene glycol) methyl ether methacrylate, and three pedant methacrylates are considered, which were introduced by Fu et al. (2016). Finally, according to introducing the methodology of carbon dioxide (CO₂) trapping, the impact of various effective parameters on the stability of composite beams will be analyzed in detail.

• 한국인쇄학회지
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• 제15권1호
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• pp.85-96
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• 1997

The color difference between original and printed copy is affected mainly by ink trapping and optical properties of overprinted ink layer. Since the general expression itself about ink trapping is affected also by the optical properties, the analysis of color difference using the ink trapping only cannot be certain. This study will show a new approaching method for optical analysis of spectral reflectance and the effect of printing sequence on color difference in multi-color overprints under the condition of excluding completely the ink trapping problems by means of using transparent film as a substrate.

• 연구논문집
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• 통권26호
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• pp.95-102
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• 1996

The carbide growth behavior of MAR-M247 LC alloy was investigated by directional solidification and quench method. The carbide volume fraction, trapping and growth behavior were correlated with the growth rate. It was found that the carbide volume fraction decreases at slower growth rate. This decreasing was caused by lower solid-liquid interface trapping ability at the slower growth rate.

• 한국응용곤충학회지
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• 제62권4호
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• pp.245-253
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• 2023

대량유살 기술을 통한 총채벌레 방제 기술이 시설 고추재배지를 중심으로 개발되었다. 이 기술의 핵심 요인은 효과적 유인제 개발에 있다. 집합페로몬에 의존하였던 유인전략은 노지 재배지에서는 뚜렷한 효과를 보이지 않았다. 따라서 본 연구는 노지 고추재배지에서 총채벌레의 대량 유살을 위해 새로운 유인물질의 추가가 필요하였다. 또한 노지재배지에서 집합페로몬의 유인력 감소 원인을 규명할 필요가 있었다. 새로운 유인물질로서 methyl isonicotinate (MIN)이 제시되었고, 이 물질이 실내 유인행동분석을 통해 총채벌레에 대한 자체 유인력은 물론이고 집합페로몬과 협력효과를 보였다. 이를 바탕으로 집합페로몬과 혼합물 형태로 노지 고추재배지에서 분석한 결과 총채벌레의 포획밀도를 증가시켰다. 특히 이러한 증가는 꽃노랑총채벌레(Frankliniella occidentalis)에서 뚜렷하게 나타났다. 유인트랩에 집합페로몬의 함량 증가는 노지 고추재배지에서 꽃노랑총채벌레는 물론이고 다른 총채벌레류의 포획밀도를 뚜렷하게 증가시켰다. 본 연구는 집합페로몬 유인력이 시설재배지와 노지재배지 사이에서 차이가 있으며, 노지 재배지의 경우 효과적 유인력을 발휘하기 위해서는 더욱 많은 집합페로몬 함량을 요구한다는 것을 밝혔다. 또한 본 연구는 집합페로몬에 MIN을 추가하여 꽃노랑총채벌레에 대한 고효율 유인제를 개발할 수 있는 기술을 제시한다.

• 전자공학회논문지D
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• 제36D권3호
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• pp.34-40
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• 1999

최근, 플라즈마 공정에 의해 발생하는 게이트 산화막의 손상은 게이트 산화막의 두께가 10nm이하로 감소함에 따라서 가정 중요한 신뢰성 문제들 중의 하나가 되고 있다. 플라즈마로 인한 손상은 metal 안테나 테스트 구조들을 가지고 연구되었다. Metal 안테나를 가지고 있는 NMOS에서 플라즈마로 인한 전하 축적으로 말미암아 10nm의 게이트 산화막에 전자 포획뿐만 아니라 정공 포획이 발생하는 것이 관측되었다. 정공포획은 전자 포획의 경우와 유사하게 transconductance(gm)의 감소를 일으키기는 하지만, 그 정도가 훨씬 적었다. 이는 플라즈마로 인한 축적이 정공 포획이 발생한 소자의 게이트 산화막에 가한 전기적 stress 가 전자 포획이 발생한 소자의 경우보다 훨씬 적었기 때문일 것이다. 이 이론은 산화막에서의 Fowler-Nordheim 전류 특성을 측정한 결과들에 의해 입증되었다.

• Journal of Korean Neurosurgical Society
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• 제51권5호
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• pp.296-300
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• 2012

Internal carotid artery (ICA) trapping can be used for the treatment of giant intracranial aneurysms, blood blister-like aneurysms, and fusiform dissecting aneurysms. Fusiform dissecting aneurysms are challenging to treat surgically and endovascularly because of no definite neck and critical perforators. Surgical or endovascular trapping of the ICA with or without an extracranial-intracranial bypass has commonly been used as an effective method to treat these lesions, but balloon test occlusion (BTO) must be performed. Here, we report a case of a ruptured fusiform dissecting aneurysm of the distal ICA, which was successfully treated using an endovascular ICA trapping with a manual ICA compression test instead of BTO.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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• pp.387.2-387.2
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• 2016

Glass texturing is a sufficient method for changing the surface morphology to enhance the light trapping. In this study, glass texturing was applied to the perovskite solar cell for improving the current density. Glass substrates (back-side glass of FTO coated glass substrate) were textured by randomly structure assisted wet etching process using diluted HF solution at a constant concentration of etchants (HF:H2O=1:1). Then, the light trapping properties of suitable films were controlled over a wide range by varying the etching time (1, 2, 3, 4 and 5 min.). The surface texturing changed the reflected light in an angle that it can be reflected by substrate glass surface. As a result, Current density and cell efficiency were affected by light trapping layer using glass texturing method in perovskite solar cells.