• Science of Emotion and Sensibility
• /
• v.16 no.4
• /
• pp.517-526
• /
• 2013

This paper reports on flexible plastic optical fiber (POF) fabric displays which are used to develop light-emitting clothing from photonic fabric. We first evaluated the luminescence value corresponding to different methods of processing flexible optical fibers, types of reflective fabric structure, and colors of the light. Moreover, we tried to identify the optimum conditions of the flexible POF fabric displays to realize high luminescence value. The processing methods that were compared were the "Pre-etching" method and the "Post-etching" method. On the basis of the reflective structure of the fabric, the fabrics were categorized as the "White fabric" and the "Reflective fabric." Analysis results showed that the effect of the processing method is more dominant than that of the types of reflective fabric structure. Further, the capability of the Post-etching method to increase luminescence value is slightly higher than that of the Pre-etching method. Further, the 'Reflective fabric' is slightly more efficacious as the base fabric to increase the luminescence value, than the White fabric is. Thus, optimum increase in luminance can be realized by employing the Post-etching method and the Reflective fabric as the base fabric.

• Proceedings of the KSAR Conference
• /
• 2003.06a
• /
• pp.86-86
• /
• 2003

한우의 사육규모가 커짐에 따라 농가에서 암소의 번식관리는 더욱 어려워지게 되었으며 이를 효율적으로 조절하고자 다양한 발정제어 처리에 따라 수태시켰으며 이에 따라 임신한 한우번식우의 분만내역과 다음번 번식에 미치는 영향을 규명하고자 수행하였다. 1) 발정유기 방법별분만율은 PeGF$_2$$\alpha$구에서 73%(73/100), PRID구에서 73.3%(22/30), CIDR구에서 76.6%(23/30), GnRH-PGF$_2$$\alpha$-GnRH 처리구에서 81%(81/100)였으며 전체적으로 76.5%(199/260)로 나타났다. 2) 생시체중은 자연발정구에서 암송아지는 23.9kg, 수송아지는 26.2kg인 반면에 발정유기구에서는 암송아지는 24kg, 수송아지는 24.9kg으로써 거의 차이를 보이지 않았고, 4개월령 체중에 있어서도 자연발정구에서 암송아지 72kg, 수송아지 75kg인 반면에 발정유기구에서는 암송아지 75.6kg, 수송아지 78.3kg으로 발육상에 차이가 없었다. 3) 송아지 육성율은 자연발정구에서 86.5%(251/290)이었으며, 발정유기구에서는 87.0% (175/201)로써 유사한 경향을 나타내었으나 농가의 사육경험에 따라 6년 이상에서는 84.0% (105/125)였고, 10년 이상에서 88.4%(146/165) 로써 사육 경험이 많을수록 우수하였다. 4) 분만후 발정재귀일수는 대조구에서 80.7일, PGF$_2$$\alpha$구에서 92.3일, PRID구에서 78.5일, CIDR구에서 64.5일, GnRH-PGF$_2$$\alpha$-GnRH 처리구에서 65.6일로 나타났고 분만 후 수태일수는 대조구에서 137.1일, PGF$_2$$\alpha$구에서 147.6일. PRID구에서 141.3일, CIDR구에서 116.6일, GnRH-PGF$_2$$\alpha$-GnRH 처리구에서 118일로 나타났다.

• The Transactions of the Korea Information Processing Society
• /
• v.6 no.1
• /
• pp.75-83
• /
• 1999

recently, a new hypercube-like interconnection network, the Z-cube, was proposed. The Z-cube retains most good topological properties, however, its node degree is 3/4 of hypercube's one. Considering hardware implementations, the Z-cube is a good alternative to the hypercube. In this paper, we obtained the diameter, fault diameter and the average distance between two nodes to evaluate the communication performance of the Z-cube. The recursive structure, the shortest path between two nodes I Z-cube and recurrence relation on the average distance were deduced, and node disjoint path was introduced. Although it is generally expected that the communication performance in an interconnection network with reduced node degree falls as much as that, this paper shows that the Z-cube's diameter is the same as the hypercube's one and the average distance between two nodes in Z-cube is about 1.125 times the average distance between two nodes in the hypercube and the fault diameter of Z-cube ranges approximately from 1.4times to 1.7times the fault diameter of the hypercube.

• Journal of Broadcast Engineering
• /
• v.18 no.4
• /
• pp.631-642
• /
• 2013

For the emerging High Efficiency Video Coding (HEVC) standard, a fast transform unit (TU) decision method is proposed. HEVC defines the TU representing a region sharing the same transformation, and it allows a residual block to be split into multiple TUs recursively to form a quadtree. By using the quadtree of TUs, HEVC supports various transform sizes from $4{\times}4$ to $32{\times}32$. The various sizes of TUs can provide a good coding efficiency, whereas this may increase encoding complexity dramatically. In the assumption that a TU with highly compacted energy is unlikely to be split, the proposed method determines TU sizes according to the position of the last non-zero transform coefficient. In the experimental results, the proposed method reduced 18% encoding run time with the negligible coding loss of 0.7% BD-rate for the Random_access case.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.49 no.1
• /
• pp.104-111
• /
• 2012

In this paper, we propose a novel method to improve the performance of the improved minima controlled recursive averaging (IMCRA). From an examination for various noise environment, it is shown that the IMCRA has a fundamental drawback for the noise power estimate at the offset region of continuity speech signals. Espectially, it is difficult to obtain the robust estimates of the noise power in non-stationary noisy environments that is rapidly changed the spectral characteristics such as babble noise. To overcome the drawback, we apply the global speech absence probability (GSAP) conditioned on both a priori SNR and a posteriori SNR to the speech detection algorithm of IMCRA. With the performance criteria of the ITU-T P.862 perceptual evaluation of speech quality (PESQ) and a composite measure test, we show that the proposed algorithm yields better results compared to the conventional IMCRA-based scheme under various noise environments. In particular, in the case of babble 5 dB, the proposed method produced a remarkable improvement compared to the IMCRA ( PESQ = 0.026, composite measure = 0.029 ).

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.39A no.5
• /
• pp.280-292
• /
• 2014

Recently, heterogeneous networks consisting of small-cells on top of traditional macro-cellular network has attracted much attention, because traditional macro-cellular network is not suitable to support more demanding mobile data traffic due to its limitation of spatial reuse. However, due to the transmit power difference between macro- and small-cells, most users are associated with macro-cells rather than small-cells. To solve this problem, enhanced inter-cell interference coordination (eICIC) has been introduced. Particularly, in eICIC, the small-cell coverage is forcibly expanded to associate more users with small-cells. Then, to avoid cross-tier interference from macro-cells, these users are allowed to receive the data during almost blank subframe (ABS) in which macro-cells almost remain silent. However, this approach is not sufficient to balance the load between macro- and small-cells because it only expands the small-cell coverage. In this paper, we propose a load balance scheme improving proportional fairness for heterogeneous networks employing eICIC. In particular, the proposed scheme combines the greedy-based user association and the ABS rate determination in a recursive manner to perform the load balance.

• Journal of KIISE:Information Networking
• /
• v.33 no.6
• /
• pp.428-437
• /
• 2006

Wireless ad-hoc routing has been extensively studied and many clever schemes have been proposed over the last several years. One class of ad-hoc routing is geographic routing where each intermediate node independently selects the next hop using the given location information of destination. Geographic routing, which eliminates the overhead of route request packet flooding, is scalable and suitable for large scale ad hoc networks. However, geographic routing may select the long detour paths when there are voids between a source and a destination. In this paper, we propose a novel geographic routing approach called Geographic Landmark Routing(GLR). GLR recursively discovers the intermediate nodes called landmarks and constructs sub-paths that connect the subsequent landmarks. Simulation results on various network topologies show that GLR significantly improves the performance of geographic routing.

• KIPS Transactions on Software and Data Engineering
• /
• v.11 no.1
• /
• pp.11-18
• /
• 2022

De novo drug design is the process of developing new drugs that can interact with biological targets such as protein receptors. Traditional process of de novo drug design consists of drug candidate discovery and drug development, but it requires a long time of more than 10 years to develop a new drug. Deep learning-based methods are being studied to shorten this period and efficiently find chemical compounds for new drug candidates. Many existing deep learning-based drug design models utilize recurrent neural networks to generate a chemical entity represented by SMILES strings, but due to the disadvantages of the recurrent networks, such as slow training speed and poor understanding of complex molecular formula rules, there is room for improvement. To overcome these shortcomings, we propose a deep learning model for SMILES string generation using variational autoencoders with self-attention mechanism. Our proposed model decreased the training time by 1/26 compared to the latest drug design model, as well as generated valid SMILES more effectively.

• Proceedings of the Acoustical Society of Korea Conference
• /
• spring
• /
• pp.109-112
• /
• 1999

본 연구에서는 신호원에 대한 사전 정보 없이 혼합된 신호로부터 잡음 신호만을 선택적으로 제거할 수 있는 새로운 형태의 능동 소음 제거기(Active noise canceller)를 제안한다. 음성신호와 같은 독특성을 갖는 신호의 분리에 효과적으로 사용되는 동적 재귀 신경망 (Dynamic recurrent neural network)을 원하는 신호원에 섞인 잡음신호를 분리하여 선택적으로 제거하기 위한 능동소음제거기의 전처리기로 미용한다. 능동 소음 제거기는 분리된 잡음 신호에 대한 역 위상 신호를 적응적으로 발생함으로써 특정 위치에서 원하는 신호만을 선택적으로 남길 수 있도록 한다. 컴퓨터를 이용한 시뮬레이션에서는 제안된 시스템이 선택적인 소음제거에 효과적임을 보인다.

• The Journal of the Acoustical Society of Korea
• /
• v.18 no.6
• /
• pp.3-8
• /
• 1999

In this paper, we propose a new active noise control system that cancels the only noise signal from the mixture selectively. A blind source separation realized by a dynamic recurrent neural network is used as a preprocessor of the active noise control system and separates the desired signal and the noise signal. The active noise control system adaptively generates an anti-noise signal to remove the only noise signal separated by the blind source separation. Computer simulation results show that the proposed scheme is effective to construct a selective attention system.