• Transactions of the Korean Society of Automotive Engineers
• /
• v.11 no.6
• /
• pp.164-170
• /
• 2003

The finite element analysis of tires has been conventionally performed by either neglecting tread pattern or modeling only circumferential grooves. Besides, the tire analysis has been mainly limited to static or steady state rolling analysis. In this paper, a transient dynamic analysis of a patterned tire rolling over a cleat with an explicit finite element program is presented. The patterned tire with detailed tread blocks is modeled by a systematic mesh generation procedure, in which tire body and tread pattern meshes are separately generated in the beginning and then both meshes are combined by the tie constraint method. The cleat impact analysis is conducted by using both the patterned tire and the smooth tire models to predict the cleat enveloping characteristics. It is seen that the analysis results of the patterned tire model are in a good agreement with the experimental results.

• Proceedings of the KIEE Conference
• /
• 2003.07e
• /
• pp.113-116
• /
• 2003

BiCMOS circuit consist of CMOS part which constructs logic function, and bipolar part which drives output load. In this paper, proposes a method for efficiently generating test pattern which detect faults in BiCMOS circuits. In proposed method, BiCMOS circuit is divided into pull-up part and pull-down part, using structural property of BiCMOS circuit, and we generate test pattern using set theory for efficiently detecting faults which occured each divided blocks.

• Journal of the Korean Institute of Telematics and Electronics B
• /
• v.30B no.4
• /
• pp.85-91
• /
• 1993

In this paper, we propose the test pattern generation algorithm of the embedded faulty MUX for the prevention of misdiagnosis of digital systems. When the system is partitioned with a large number of functional blocks, if the faults are exsisted in a embedded MUX then it can not diagnose the wanted observation of functional block. The proposed test pattern generstion algorithm can apply the MUXs that designd 2-level and multi-level both. Fault coverage becomes 100% and so it is no necessary of the additional fault simulation and the proposed algorithm that have the regulary and easily generated 2d test patterns. And we confirmed that the reduction of test cost becomes 85%, compared with the conventional segmentation testing scheme.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2019.05a
• /
• pp.203-204
• /
• 2019

Recently, exposed concrete designs have been placed everywhere due to increased interest in indoor residential environments. In addition, in order to overcome the disadvantages of litracon, which was developed by mixing optical fiber, LEFC(Light Emotion Friendly Concrete) was developed in Korea, which improved unit price and constructivity by inserting hard acrylic rods. LEFC, using foaming agent and lightweight aggregate for light weighting, has disadvantages that decrease mechanical properties, and thus improved mechanical properties by using ultra-high performance concrete. Also, due to the characteristics of UHPC materials, it showed excellent self-consolidating performance. Considering these characteristics, a LEFC mold with pattern design was developed. The LEFC blocks were built so that pattern shapes could be seen and these were applied on-site to Sewoon plaza, located in Seoul.

• The Journal of Korean Medicine
• /
• v.31 no.1
• /
• pp.47-56
• /
• 2010

Objective: Many drug or non-drug therapies are reported to be effective in reducing the severity of attention deficit/hyperactivity disorder (ADHD). The aim of this study was to assess the effect of color and pattern on the severity of ADHD in young ADHD patients. Method: We randomly assigned 30 children into two groups and had them participate in 15-minute block play sessions once in a week. The experimental group used blocks with green (3G, Munsell color system) circle patterns on them, while the control group played with plain white blocks. We also provided a set of playing cards with the corresponding patterns. This trial continued for 4 weeks and 29 children (96.7%) completed. The primary outcome measurement was the ADHD rating scale-IV and was evaluated on every visit. Results: After the trial, ADHD score decreased in both groups but not significantly ($34.4{\pm}8.0$ to $30.0{\pm}4.3$; $34.0{\pm}6.0$ to $30.3{\pm}3.2$). However, there were significant differences in 4 items of ADHD rating scale between the two groups. These consisted of 3 inattention (Q3, Q7, Q15) and 1 hyperactivity-impulsivity (Q12) items and the reduction between the first and final visits was significant (p=0.0240, p=0.0498, p=0.0237 and p=0.0012 respectively). Conclusion: Repeated exposure to a green circle pattern might not influence the total score of ADHD rating scale but reduced 3 inattention items and 1 hyperactivity-impulsivity significantly in children with ADHD. Proper visual stimuli are partially helpful for pediatric ADHD.

• Journal of Fashion Business
• /
• v.20 no.5
• /
• pp.45-59
• /
• 2016

This research is a study to develop basic block patterns for adult males. The subjects were 20 men in their 20s, and we tested 6 basic bodice blocks that are used in academia and industry. First, a comparative analysis of the patterns of the bodice blocks was conducted and the test garments were made, and then their appearances were evaluated during wearing tests. Based on the test results, we intended to select a bodice block that is a good fit when it is put on and to use it as basic data in order to design a man's bodice block for the future. The research results are as follows: First, a comparison of the 6 bodice block drafts showed that they used differently calculated ease allowances at chest circumference and width, waist circumference, shoulder length, etc. for which the upper chest circumference is used as a reference. Second, when the appearances of the test garments were tested, the average scores were high in the order of B> H> P> K> M> L. Pattern B was superior in the areas of the neck circumference and shape, ease allowance at the back of the neck, circumference of the front of the neck, location of side width, ease allowance at sides, armhole width and depth. But in the other test items, there were cases where other patterns were superior.

• Journal of the Korea Society of Computer and Information
• /
• v.11 no.4 s.42
• /
• pp.77-85
• /
• 2006

There is the spatial correlation of the video sequence between the motion vector of current blocks. In this paper, we propose the enhanced fast block matching algorithm using the spatial correlation of the video sequence and the center-biased properly of motion vectors. The proposed algorithm determines an exact motion vector using the predicted motion vector from the adjacent macro blocks of the current frame and the Cross-Hexagonal search pattern. From the of experimental results, we can see that our proposed algorithm outperforms both the prediction search algorithm (NNS) and the fast block matching algorithm (CHS) in terms of the search speed and the coded video's quality. Using our algorithm, we can improve the search speed by up to $0.1{\sim}38%$ and also diminish the PSNR (Peak Signal Noise Ratio) by at nst $0.05{\sim}2.5dB$, thereby improving the video qualify.

• Convergence Security Journal
• /
• v.14 no.5
• /
• pp.49-56
• /
• 2014

In this paper, we proposed a method for representing local facial features based on LDP (Local Directional Pattern). To represent both PFF (Permanent Facial Features) and TFF (Transient Facial Features) effectively, the proposed method configure local facial feature vectors based on overlapped blocks for each facial feature in the forms of various size and shape. There are three advantages - it take advantages of geometric feature based method; it shows robustness about detection error using movement characteristics of each facial feature; and it shows reduced sampling error because maintain spatial information caused by block size variability. Proposed method shows better classification accuracy and reduced amount of calculation than existing methods.

• Korean Journal of Cognitive Science
• /
• v.17 no.3
• /
• pp.177-190
• /
• 2006

Present study was investigated to measure the influence of expectancy on emotional information processing. For inducing an expectancy for emotional stimulus, participants conducted three same blocks in which negative face was presented for prime in 75% of total trials(Group1) or three same blocks in which positive face was presented in 75% of total trials(Group2). We compared the means of RTs of two blocks conducted after and before these induction blocks. Results exhibited that participants in Group 1 allocated more attention after expectancy induction. This indicate that in normal population, the top-down processing like expectancy can influence emotional processing pattern related to negative information.

• Proceedings of the Korea Contents Association Conference
• /
• 2009.05a
• /
• pp.51-56
• /
• 2009

Flash memory has rapidly deployed as data storage. However, the flash memory has a major disadvantage that recorded data cannot be dynamically overwritten. In order to solve this "erase-before-write" problem, the log block buffer scheme used Flash memory file system. however, the current managements of the log buffer, in case random write pattern, BAST technique have problem of frequent merge operation, but FAST technique don't consider merge operation by frequently updated data. Previous methods not consider merge operation cost and frequently updated data. In this paper, we propose a new log buffer management scheme, called JBB. Our proposed method evaluates the worth of the merge of log blocks, so we conducts the merge operation between infrequently updated data and its data blocks, and postpone the merge operation between frequently updated data and its data blocks. Through the method, we prevent the unnecessary merge operations, reduce the number of the erase operation, and improve the utilization of the flash memory storage. We show the superiority of our proposed method through the performance evaluation with BAST and FAST.