• Journal of architectural history
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• v.16 no.1
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• pp.29-48
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• 2007

This study is an investigation that explication of the reading method of transcription marking, and explains what it means and where to use transcription marking of architectural vocabulary. focusing on timber class vocabulary from on SeoGwolYeongGeonDoGamUiGwe(${\ulcorner}$西闕營建都監儀軌(1831)${\lrcorner}$). This study is reviewed sequentially classifying items according to timber class, stone class, iron class architectural vocabulary. This treatise, named 'Architectural Vocabulary Study (1)', is mainly focused on making out a transcription marking of timber class vocabulary on the documents. But, because of the properties of the UiGwe(儀軌), there are some different expressions used for the same vocabulary. Therefore, the different expressions are referenced according to vocabulary used from the 17th century to the 20c century. This study lists timber class architectural vocabulary of transcription marking on SeoGwolYeongGeonDoGamUiGwe(${\ulcorner}$西闕營建都監儀軌(1831)$\lrcorner$). This study also explicates and explains the meaning of them. In advance, this study compares them with the vocabulary of national language in the middle ages and modern times. If we could explicate the transcription marking of the documents as it is, we can't only recover plenty of vocabulary related with characteristic architecture in the age of later Chosun Dynasty, but also correct wrongly used vocabulary nowadays. With the results, we can standardize and adjust vocabulary use of Korean traditional architecture. In advance, we can correct errors of spelling and mistaken explanation in the Korean Encyclopedia.

• Laser Solutions
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• v.7 no.2
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• pp.11-18
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• 2004

We propose a novel application of optical coherence tomography (OCT) to monitor pit formation in laser irradiated optical storage materials. A multilayer optical storage recordable compact disk, is composed of multiple layers, each of different structure. Disks were irradiated with aQ-Switched Nd:YAG laser with an energy of 373 mJ. Post-irradiated disks were evaluated by OCT and those images were compared with optical microscopy. Our results indicate that OCT is a useful instrument to investigate pit formation in multilayer optical storage disks and might also provide information to optimize optical memory technology.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.1
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• pp.79-84
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• 2003

A light guide panel is an element of the LCD backlight module that is often used for the display of compact electronic devices. In this study, a laser marking system is proposed to fabricate light guide panel, which can replace other manufacturing methods such as silk printing, stamping, or v-cutting methods. The objective of this research is to evaluate the process parameters of the laser marking system. Light guide patterns were marked with a 50W $CO_2$ laser (CW) to understand the effects of average power and scanning speed on the geometry and quality of groove pattern. The width of the fabricated grooves increases with increasing laser power and decreasing scan speed. In order to analyze surface characteristics and optical properties (luminance, uniformity), SEM photography and BM7 (luminance measuring system) were used. As a result, the optimal conditions of the process parameters were determined.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.977-980
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• 2005

The motivation of IP traceback is to identify the true source of an IP datagram in internet. These techniques now emerging as effective deterrent for current cyber threats, especially (D)DoS. Deterministic Packet Marking (DPM) is one of the algorithm used for IP traceback. This paper elucidates the implementation of deterministic packet marking scheme on IPv6 networks. The proposed scheme is capable of single packet traceback. We also examined the issues regarding IPv6 header and show that this scheme is practical, scalable, efficient and can be implemented on existing IPv6 networks easily.

• Journal of the Korean Operations Research and Management Science Society
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• v.21 no.2
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• pp.111-124
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• 1996

The main purpose of this study is to develop an algorithm to solve the scheduling problems of FMS using Petri-net is well suited to model the dynamics of FMS and Petri-net is an ideal tool to formulate scheduling problems with routing flexibility and shared resources. By using the marking of Petri-net, We can model features of discrete even system, such as concurrency, asynchronous, conflict and non-determinism. The proposed algorithm in this paper can handle back-tracking using the marking of Petri-net. The results of the experiment show that marking is one of the best ways that describe exactly movement of the discrete event system. To show the effectiveness of the algorithm suggested here, we compare it with L1 algorithm using the Petri-net through the test on randomly generated test problems.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.908-911
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• 2002

본 논문에서는 영상의 불법적인 복사를 방지하기 위해 사용되는 워터마킹을 내장한 JPEG 압축용 DCT의 VHDL 모델을 제시한다. 워터마킹 방법은 사람의 시각 시스템을 이용하여 주파수 영역에서 영상의 시각적인 특성에 적응하는 워터마크를 내장한다. 영상 압축시에 주파수 영역으로 변환해주는 DCT와 함께 화질저하에 대한감소와 공격에 강한 water marking을 구현함으로서 손실 압축에서도 방지 기능을 유지하면서 시스템의 효율적인 구성을 얻을 수 있다. 구현된 DCT의 VHDL 모델을 사용한 시뮬레이션 결과 고주파 성분이 많은 복잡한 영상과 저주파 성분이 많은 단순한 영상에 적용하여 워터마크가 시각적으로 보이지 않고 JPEG 손실압축과 잡음에도 견고함을 가지며, 기능을 추가하여도 기존에 비해 면적을 적게 차지하여 빠른 속도를 얻을 수 있어, 소형 시스템에 솔루션에 적용이 적합하다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.2137-2140
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• 2003

최근 IP 역추적을 위한 다양한 연구가 진행되고 있다. 피 중 주목할 만한 역추적 시스템인 확률적 패킷 마킹 기법은 대량의 패킷을 필요로 하는 분산 서비스 거부 공격의 특징을 이용한 매우 효율적이고 실용적인 접근 방식이다. 그러나 이 방식은 모든 라우터의 수정이 불가피하다는 점과 공격을 당한 피해 시스템에서 완벽한 공격 경로를 재구성하기 위해 엄청난 부담을 짊어지게 되는 문제점을 드러냈다. 이러한 문제점에 대한 해결책으로 본 논문에서는 네트워크에 유입되는 패킷에 출발지 라우터의 주소만을 마킹하는 Admission Packet Marking 기법을 제안하고 기존 연구와의 비친 분석을 통해 기존 인터넷에의 적용 가능성을 판단한다.

• Proceedings of the KIEE Conference
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• 1998.11b
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• pp.672-674
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• 1998

Java virtual machine has the garbage collector that automate memory management. Mark-compact algorithm is one of the garbage collection algorithm that operating in 2 phases, marking and sweeping. One is Marking is marking live objects reachable from root object set. Sweeping is sweeping unmarked object from memory(return to free memory pool). This algorithm is easy to implement but cause a memory fragmentation. So compacting memory, before memory defragmentation become serious. When compacting memory, all other processes are suspended. It is critical for embedded system that must guarantee real-time processing. This paper introduce enhanced mark-compact garbage collection algorithm. Grouping the objects by their size that minimize memory fragmentation. Then apply smart algorithm to the grouped objects when allocating objects and compacting memory.

• Speech Sciences
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• v.1
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• pp.227-236
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• 1997

How do aphasics deal with the inflectional marking occurring in agglutinative languages like Korean? Korean speech repetition, comprehension and production were studied in 3 Broca's aphasic speakers of Korean. As experimental materials, 100 easy sentences were chosen in 1st grade Korean elementary school textbooks about reading writing and listening, and two pictures were made from each sentence. This study examines the use of three kinds of inflectional markings--past tense, nominative case, and accusative case. The analysis focuses on whether each inflectional marking was performed well or not in tasks such as repetition, comprehension and production. In addition, morphological errors concerned with each inflectional marking were analyzed in view of markedness. In general, the aphasic subjects showed a clear preservation of the morphological aspects of their native language. So the view of Broca's aphasics as agrammatical could not be strongly supported. It can be suggested that nominative case and accusative case are marked elements in Korean.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2771-2773
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• 2001

날씨변화와 차량의 속도차이 등으로 주어지는 외란은 차량번호판을 인식하기 위한 전처리 작업인 영상 추출에 어려움을 준다. 따라서 이러한 외란으로 부터 강인하면서도 효과적으로 번호판을 추출하기 위한 방법으로 Background Marking 방법을 제안한다. 이 방법은 차량의 종류에 따른 번호판 색상 및 인식을 어렵게 하는 여러가지 조건들을 고려함으로써 차량번호판을 보다 효과적으로 추출하는 방법이다. 또한, 히스토그램 정규화를 사용하여 밝기의 차이에 의한 영상의 손상을 보상함으로써 보다 선명한 차량번호판 영상을 습득 할 수 있게 된다. 제안된 방법을 주행 중 또는 주차 중인 차량영상에 적용하여 성능을 검증하였다.