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1.
Neugroschel A. Chih-Tang Sah Carroll M.S. 《Electron Devices, IEEE Transactions on》1996,43(8):1286-1290
Experimental evidences are given which demonstrate that degradation of the common-emitter forward current gain hFE of submicron silicon npn bipolar transistors at low reverse emitter-base junction applied voltage is caused by primary hot holes of the n+ /p emitter tunneling current rather than secondary hot electrons generated by the hot holes or thermally-generated hot electrons. Experiments also showed similar kinetic energy dependence of the generation rate of oxide/silicon interface traps by primary hot electrons and primary hot holes. Significant hFE degradation was observed at stress voltages less than 2.4 V 相似文献
2.
Yongmin Park Jang Jin Yoo Dongwoo Kang Sungjin Kim 《Journal of the Society for Information Display》2015,23(9):391-396
We present a feasible modeling method to estimate the proper curvature for large‐sized curved TVs. We especially focused on two factors – preference and perceived distortion – to be considered to determine the proper curvature. The preference includes a number of advantages that people expect to fulfill the possibilities of a more immersive image and sense of realism from curved display. On the other hand, the perceived distortion means the side effects that people can notice uncomfortable feeling caused by the shape of a curved one. In order to find out how two factors would be different as a number of conditions like curvature, size, and viewing angle change, a series of subjective assessments were conducted. The evaluation results show that both the preference and perceived distortion vary with the conditions considerably. We performed the statistical analysis based on the results and proposed the quantification model of proper curvature, which has higher preference and less perceived distortion, for various‐sized curved TVs. 相似文献
3.
Jonghoon Lee Sungjin Lee Hyeongjong Noh Kyusong Lee Gary Geunbae Lee 《Knowledge》2011,24(7):1120-1130
Word alignment is a crucial component in applications that use bilingual resources. Statistical methods are widely used because they are portable and allow simple system building. However, pure statistical methods often incorrectly align functional words in the English–Korean language pair due to differences in the typology of the languages and a lack of knowledge. Knowledge is inevitably required to correct errors and to improve word alignment quality. In this paper, we introduce an effective method that uses an iterative process to incorporate knowledge into the word alignment system. The method achieved significant improvements in word alignment and its application: statistical machine translation. 相似文献
4.
A factor combination approach to developing style guides for mobile phone user interface 总被引:1,自引:0,他引:1
Wonkyu ParkSung H. Han Sungjin KangYong S. Park Jaemin Chun 《International Journal of Industrial Ergonomics》2011,41(5):536-545
This paper proposes a systematic approach to developing comprehensive guidelines for mobile phone user interface, and presents a case study to validate the approach. The approach applies a systematic combination of three critical factors: general usability principles, UI components and guideline properties to developing guidelines. In the case study, this factor combination approach was very effective in collecting experts’ ideas, creating guidelines and editing them. The resulting style guide can provide comprehensive and useful guidelines for designing mobile phone UI.
Relevance to Industry
UI designers can use the results of the study as a practical method to develop style guides for mobile phone UIs. The approach taken in the study will also be helpful in managing complex guideline information systematically. 相似文献5.
ABSTRACTUsers of voice user interface (VUI) often encounter errors, such as when a VUI attempts to recognize a user’s voice inputs or execute tasks. Conversation is prone to errors, and in the collaborative perspective, communicators manage common ground together to handle erroneous situations. Adopting a collaborative view of conversation, we propose that a VUI can address different types of errors by providing users with feedback to aid them in developing common ground to communicate more effectively. To test this proposal, we conducted a 2 (error type: recognition vs. execution error) × 2 (feedback elaboration: present vs. absent) mixed-design experiment in which users interacted with a VUI speaker and evaluated its usability in these four modes. Participants reported greater acceptance of feedback and higher usability perception for a speaker returning execution errors than for one returning recognition errors, particularly when the speaker presented feedback articulating reasons for the errors. This finding indicates that a VUI can employ feedback explaining the causes of errors to facilitate the development of common ground and to minimize the negative consequences of errors. 相似文献
6.
Ji Young Hyun Cheol Wan Park Yanna Liu Daeun Kwon Seong‐Hyun Park Sungjin Park Jaeyoung Pai Prof. Dr. Injae Shin 《Chembiochem : a European journal of chemical biology》2017,18(12):1077-1082
Fifty‐five mono‐ and disaccharide analogues were prepared and used for the construction of microarrays to uncover lectin‐selective ligands. The microarray study showed that two disaccharide analogues, 28′ and 44′ , selectively bind to Solanum tuberosum lectin (STL) and wheat germ agglutinin (WGA), respectively. Cell studies indicated that 28′ and 44′ selectively block the binding of STL and WGA to mammalian cells, unlike the natural ligand LacNAc, which suppresses binding of both STL and WGA to cells. 相似文献
7.
Sequential anodic and cathodic pulse voltages were applied on anodised Al micro-electrodes in alkaline silicate electrolyte to explore the role of cathodic pulse in AC or bipolar plasma electrolytic oxidation (PEO) process. SEM observation was carried out to observe the sites of anodic and cathodic breakdown and their morphologies. The prior anodic breakdown accelerated the cathodic breakdown at ?50 V, and the acceleration was associated with the preferential cathodic breakdown at the anodic breakdown sites. However, the succeeding anodic breakdown during applying anodic pulse of 420 V for 2 ms was highly suppressed at the cathodic breakdown sites. This would randomise the anodic breakdown sites. Such role may contribute to the formation of rather uniform coatings on aluminium in this electrolyte without large discharge channels when larger cathodic current is applied with respect to the anodic current in AC PEO. 相似文献
8.
Jinsun Yoon Hong-kyu Song Sungjin Park Jongok Won Yong Soo Kang 《Polymer Bulletin》2014,71(8):2053-2065
We have investigated the effects of localized surface plasmons (LSPs) on the performance of quasi-solid-state dye-sensitized solar cells (DSSCs). Ag and Au nanoparticles (NPs) were prepared by photoreduction in the presence of generation 5 polyester hydroxyl acetylene bis(hydroxymethyl)propanoic acid dendrons (Dendron) as a stabilizer. The plasmon-enhanced DSSCs were achieved by incorporating metal@Dendron NPs into TiO2 photoanodes. The presence of dendrons prevents the photoelectrons from recombining on the surface of TiO2 semiconductor and improves the stability of metal NPs. With the addition of Ag@Dendron NPs, the photocurrent and the power conversion efficiency of quasi-solid-state DSSCs increased due to the LSP effect of metal NPs and the barrier effect of dendron, which were confirmed by the increased incident photon-to-photocurrent efficiency and by electrochemical impedance spectroscopy analysis. 相似文献
9.
本研究推荐制动系统测功器数学模型用来鉴定制动转矩的变化(BTV),并确定动态试验和仿真间的相互关系,介绍了衬垫和盘之间简单模拟,作为点接触元件以及在时间范围内瞬态响应分析。该模型指出BTV的总量与衬垫刚度,摩擦系数,制动盘厚度变化和制动衬垫的有效半径成线性正比例,采用-制动测力器和附加的材料试验进行证实分析模型,动态试验表明所推荐的模型对预测-制动系统BTV具有合理的精确度。 相似文献
10.
Ahn Seoyeon Nam Chanhyuk Choi Sungjin An Daekwon Kim Ingi Seo Kyungsoo Sohn Changhyun 《Journal of Mechanical Science and Technology》2021,35(5):1923-1933
Journal of Mechanical Science and Technology - In this paper, to help reduce the squeal noise produced during the braking of urban railway vehicles, the shape of the disc brake pad was investigated... 相似文献