• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.8
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• pp.1741-1748
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• 2005

In this paper, we describe VLSI design and performance evaluation of OCB-AES crytographic algorithm that simulataneously provides privacy and authenticity. The OCB-AES crytographic algorithm sovles the problems such as long operation time and large hardware of conventional crytographic system, because the conventional system must implement the privancy and authenticity sequentially with seqarated algorithms and hardware. The OCB-AES processor with area-efficient modular offset generator and tag generator is designed using IDEC Samsung 0.35um standard cell library and consists of about 55,700 gates. Its cipher rate is about 930Mbps and the number of clock cycles needed to generate the 128-bit tags for authenticity and integrity is (m+2)${\times}$(Nr+1), where m and Nr represent the number of block for message and number of rounds for AES encryption, respectively. The OCB-AES processor can be applicable to soft cryptographic IP of IEEE 802.11i wireless LAN and Mobile SoC.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.395-398
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• 2007

Two new cell structures for optical compensated bend were proposed. There are two groups of slit electrodes, which are driven by two different signals corresponding to the entire electrode as common electrode. The transmittance was enhanced without increasing the response time and light leakage. Compared with the traditional OCB mode, the increment of the transmittance of each kind is about 90% and 30%.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.1049-1052
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• 2004

In general, contrary to the CRTs with impulsive emission, liquid crystal displays have motion artifacts such as blurring. ghost image, decrease of dynamic CR(contrast ratio), and stroboscopic motion due to hold type driving method. In this paper, to improve motion picture quality of LCDs. impulsive driving method of black data insertion was applied to the OCB mode which is well known for its fast LC response time and wide viewing angle properties. Subject evaluation was carried out with CRT, TN, SIPS(Super IPS). and impulsive driving OCB. Moving picture image quality near CRT was obtained in impulsive OCB driving mode

• Journal of Ubiquitous Convergence Technology
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• v.2 no.1
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• pp.12-17
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• 2008

In this paper, the 128bit AES block cipher algorithm OCB (Offset Code Book) mode for privacy and authenticity of high speed packet data was efficiently designed in C language level and was optimized to support the required capacity of contents server using high performance DSP. It is known that OCB mode is about two times faster than CBC-MAC mode. As an experimental result, the encryption / decryption speed of the implemented block cipher was 308Mbps, 311 Mbps respectively at 1GHz clock speed, which is 50% faster than a general design with 3.5% more memory usage.

• The Journal of the Korea Contents Association
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• v.15 no.9
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• pp.478-493
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• 2015

The present study is aimed to investigate on the moderation of self-rated political skill on the relationships between perceived co-workers' politics and outcome variables (OCB toward co-workers and turnover intention). The used data for analysis was collected from 375 employees who have worked for public and private companies located in Jeju. The results are as follows. First, the main impacts of perceived co-workers politics(PCP) on OCB-C was not statistically significant, whereas the relation of PCP to turnover was positively significant. Second, moderating effects by political skill in the relationship perceived co-workers' politics and OCB-C was not significant, but the moderation in the relation perceived co-workers' politics-to-turnover intention was supported. Implications of the current study are 1) the casual effects of politics on OCB was demonstrated, in particular, the results of previous studies which was not consistent to account for the impact of politics on OCB was proved by the differentiation of research target. The result will help to understand perceived politics. In addition, moderation of political skill in the relation perceived co-workers' politics-to-turnover intention will contribute to expand researcher area of political skill.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.914-917
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• 2002

We have obtained high performance and low voltage driving OCB panel by reducing the critical voltage and retardation matching between liquid crystal layer and compensation films. The critical voltage in the panel has been minimized by flattening color filter layer and optimizing a rubbing process. In addition, an appropriate retardation of the film and LC layer has scanned to achieve low driving voltage and high transmission. The proto-type 17" WXGA OCB panel has demonstrated with less than 5V drive and over 80 degree for all viewing direction except for rubbing direction with over 90% of TN light efficiency.

• Journal of Industrial Convergence
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• v.7 no.1
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• pp.83-100
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• 2009

The purpose of this study was to investigate the influence of Perceived Organizational Support(POS) and on Organizational Citizenship Behavior through Organizational Commitment(OC). In order to attain the objectives of this study, a model was established and hypothesis was verified on the basis of preceding studies. In a model proposed for this study, POS was used as antecedents to OC while OCB was used as consequences for OC. The sample included 387 employees. Structural equation modeling(SEM) was used to employed the hypothesized relationships in the conceptual model. Results indicated that (a)POS has a positive impact OC; (b)affective OC has a positive impact OCB; (c)continuance OC has a negative(or zero) impact QCB. Implications are discussed and future research directions are outlined.

• Journal of Korean Academy of Nursing Administration
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• v.19 no.4
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• pp.480-490
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• 2013

Purpose: This descriptive study was done to identify effects of perceived organizational support (POS) on job involvement and organizational citizenship behavior (OCB) in hospital nurses. Methods: Data were collected from Oct. 1 to Nov. 15, 2011. Participants in this study were 324 nurses working in 6 general hospitals in S, K, and C cities. Data were analyzed using descriptive statistics, t-test, ANOVA, Scheff$\acute{e}$ test, Pearson correlation coefficients, and multiple regression. Results: POS was positively correlated with job involvement, and OCB (altruism, conscientiousness, courtesy, sportsmanship and civic virtue). Factors influencing job involvement were POS and marital status, which accounted for 15.7% of the variance, marital status influenced altruism, which accounted for 4% of the variance, POS influenced conscientiousness, which accounted for 10% of the variance, religion and marital status influenced courtesy, which accounted for 6.5% of the variance, age influenced sportsmanship, which accounted for 7.9% of the variance, and POS and clinical career influenced civic virtue, which accounted for 23.1% of the variance. Job involvement mediated on the relation between perceived organizational support and organizational citizenship behavior. Conclusion: The results of the study indicate that hospital administrators should explore ways of improve POS for better job involvement, conscientiousness, and civic virtue.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.167-170
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• 2006

In this paper, we study how the viewing angle characteristics of a bend cell can be compensated by uniaxial films such as positive a-plate, negative c-plate and circular polarizer. Especially, it is confirmed how the circular polarizer composed of a quarter-wave plate and a linear polarizer enhances the viewing angle characteristics by the $Poincar\acute{e}$ sphere representation. Also, additional compensation film is designed to improve the viewing angle characteristics of the cell by the $Poincar\acute{e}$ sphere representation.