• Proceedings of the Korean Society of Computer Information Conference
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• 2008.06a
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• pp.143-147
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• 2008

이 논문에서는 곤충 발자국의 패턴을 인식하기 위해, Trace 변환을 이용하여 발자국의 인식에 필요한 특징을 추출하는 기법을 제안한다. Trace 변환을 이용하면 패턴의 이동, 회전, 반사에 불변하는 특징값을 얻을 수 있다. 이러한 특징값들은 곤충 발자국과 같이 다양한 변형이 존재하는 패턴을 인식하는 데에 적합하다. 이 방법은 특징값을 추출하기 위해서 병렬로 표현되는 trace-line을 따라 특징들을 일차적으로 도출하고, 또 다시 도출된 특징들은 diametric, circus 단계의 함수를 거치면서 새로운 특징값으로 재구성된다. 곤충의 발자국 패턴을 이용하여 실험한 결과 곤충 발자국의 이동, 회전 반사에 관계없이 동일한 특징값이 추출됨을 확인할 수 있고, 곤충발자국의 고유한 패턴을 찾아 인식하기 위해서 추출된 특징값들은 퍼지 가중치 평균을 이용하여 인식 실험을 수행하고 그 결과를 제시하였다.

• Journal of Korea Multimedia Society
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• v.11 no.11
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• pp.1615-1623
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• 2008

This paper proposes methods to classify scanned insect footprints. We propose improved SOM and ART2 algorithms for extracting segments, basic areas for feature extraction, and utilize Trace transform and fuzzy weighted mean methods for extracting feature values for classification of the footprints. In the proposed method, regions are extracted by a morphological method in the beginning, and then improved SOM and ART2 algorithms are utilized to extract segments regardless of kinds of insects. Next, A Trace transform method is used to find feature values suitable for various kinds of deformation of insect footprints. In the Trace transform method, Triple features from reconstructed combination of diverse functions, are used to classify the footprints. In general, it is very difficult to decide automatically whether the extracted footprint segment is meaningful for classification or not. So we use a fuzzy weighted mean method for not excluding uncertain footprint segments because the uncertain footprint segments may be possible candidates for classification. We present experimental results of footprint segment extraction and segment classification by the proposed methods.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.700-704
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• 2002

본 논문은 UML로 모델링 된 Track&Trace 시스템[1]을 확장성과 유연성이 뛰어나며, 웹 상에서 안전하고 신뢰성 있으며 다양하고 광범위한 데이터 교환을 위한 XML로의 설계에 관한 연구이다. 이를 위해 UML 클래스 다이어그램의 클래스, 멤버 데이터와 데이터 타입을 이용해 Well-Formed XML에서 요소와 컨텐츠로 변환한다. 이러한 XML의 구조를 명확하게 정의하기 위해 클래스 다이어그램의 데이터 타입과 다중성을 이용해 DTD를 설계하고, 동시에 확장성을 갖춘 XML 스키마를 설계한다. 또한, XML 문서와 독립적으로 출력을 위한 스타일 지점인 CSS 와 XSL도 설계한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.31 no.6
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• pp.1127-1136
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• 2021

In the field of power analysis attacks, electrical noise and misalignment of the power consumption trace are the major factors that determine the success of the attack. Therefore, several studies have been conducted to overcome this problem, and one of them is a signal processing method based on wavelet transform. Up to now, discrete wavelet transform, which can compress the trace, has been mostly used for power side-channel power analysis because continuous wavelet transform techniques increase data size and analysis time, and there is no efficient scale selection method. In this paper, we propose an efficient scale selection method optimized for power analysis attacks. Furthermore, we show that the analysis performance can be greatly improved when using the proposed method. As a result of the CPA(Correlation Power Analysis) and DDLA(Differential Deep Learning Analysis) experiments, which are non-profiling attacks, we confirmed that the proposed method is effective for noise reduction and trace alignment.

• The Transactions of the Korea Information Processing Society
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• v.5 no.6
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• pp.1652-1659
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• 1998

To provide performance gains by reducing the operand referencing latency and data cache bandwidth requirements, we present an operand reference prediction cache (ORPC) which predicts operand value and address translation during the instruction fetch stage. The prediction is verified in the early stage, and thus it minimizes the performance penalty caused by the misprediction. Through the trace-driven simulation of six benchmark programs, the performance improvement by proposed three aRPC stmctures (OfiPC1, OfiPC2. ORPC3)is analysed and validated.

• The Journal of Engineering Geology
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• v.22 no.4
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• pp.459-466
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• 2012

A difficulty encountered in engineering seismic mapping is that reflection events from shallow discontinuities are commonly overlapped with coherent noise such as air wave, direct waves, head waves, and high-amplitude surface waves. Here, the radial trace transform, a simple geometric re-mapping of a trace gather (x-t domain) to another trace gather (v-t domain), is applied to investigate the rejection effect of coherent linear noises. Two different types of data sets were selected as a representative database: good-quality data for intermediate sounding (hundreds of meters) in a sedimentary basin and very noisy data for shallow (${\leq}50m$) mapping of the weathered zone and bedrock surface. Results obtained with cascaded application of the radial transform and low-cut filtering proved to be as good as, or better than, those produced using f-k filtering, and were especially effective for air wave and direct wave. This simple transform enables better understanding of the characteristics of various types of noise in the RT domain, and can be generally applied to overcoming diffractions and back-scatterings caused by joints, fractures, and faults commonly that are encountered in geotechnical problems.

• Journal of Advanced Marine Engineering and Technology
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• v.32 no.8
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• pp.1309-1314
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• 2008

Seismic data is often contaminated with high-energy, spatially aliased noise, which has proven impractical to attenuate using Fourier techniques. Wavelet filtering, however, has proven capable of attacking several types of localized noise simultaneously regardless of their frequencies. In this study a 2-D stationary wavelet transform is used to decompose seismic data into its wavelet components. A threshold is applied to these coefficients to attenuate high amplitude noise, followed by an inverse transform to reconstruct the seismic trace. The stationary wavelet transform minimizes the phase-shift errors induced by thresholding that occur when the conventional discrete wavelet transform is used.

• Information Systems Review
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• v.6 no.2
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• pp.65-77
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• 2004

Business intelligence assumes an integrated and inter-connected information resources. To manage an integrated database, we need to trace data transformation processes from its outset. For this purpose, this study proposes an extended Information Structure Graph that models data transformation steps in addition to data transformation structures. Using the graph, we can identify relationship among data entities and assign data quality measures to each nodes or arcs of a graph, thus eases management of data and enhancing their quality.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.6A
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• pp.549-554
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• 2002

In this paper, for n=2m and odd prime p, new generalized bent functions from the finite field $F_{p^n}$ to the prime field $F_p$ are constructed from the partial spreads for $F_{p^n}$. Closed form expressions for the proposed generalized bent functions and their trace transform are derived in the form of the trace functions.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.1A
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• pp.35-41
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• 2002

In this paper, we generalize the family of binary bent sequences introduced by Olsen, Scholtz and Welch [2] to obtain the generalized binary bent sequences with optimal correlation and balance properties. The modified trace transform is introduced and it enables us to use linear function from ${F_{2^n}}$ to the intermediate field ${F_{2^e}}$, where e|n. If we choose e=1, our method becomes the conventional binary bent sequence case. Also, some examples are given which show that our construction gives the family of simple binary sequences with optimal correlation and balance properties.