• Journal of Advanced Navigation Technology
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• v.13 no.6
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• pp.838-845
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• 2009

In order to obtain magneto-dielectrics with various permmittivity and permeability which could be used as the antenna substrate, various magneto-dielectrics compounded of dielectric materials(such as silicon and epoxy resin) and magnetic materials(such as carbonyl iron, barium and strontium powder) were fabricated. The relative permittivity and permeability of those were measured by use of HP 4291B impedance analyzer. Based upon the measured results, inverted-F meander monopole antennas(IFA) which were printed on the magneto-dielectric substrates fabricated as film type were designed and fabricated to investigate into variations of antenna characteristics such as the resonant frequency and impedance bandwidth in comparison with use of dielectric substrate. Some simulated and measured results for the designed IFA were presented. Characteristics of magneto-dielectrics which are different according as the choice of magnetic material or the composition ratio between magnetic material and dielectric material is different have been discussed.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.1
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• pp.179-184
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• 2014

The discharge characteristics of an open dielectric structure were investigated, especially such as a firing voltage and related wall voltage, compared with conventional panel structure based on the Vt close curve measurement in AC plasma display panel. While the front panel of the conventional structure in AC plasma display panel was composed of the glass, electrodes, and dielectric, the open dielectric structure could easily produce the discharge between the scan and the sustain electrodes by erasing the dielectric layer between two electrodes. As the open dielectric structure differ from the conventional structure, various problems were produced when driving with the conventional driving waveform. Especially, due to the changes in the discharge firing characteristics of the open dielectric structure between the scan and the sustain electrodes on the front panel, the conventional reset waveform including the address waveform needed to be modified. In this study, the Vt close curves were measured to compare the discharge firing voltages on three electrodes in the conventional and open dielectric structure and based on the Vt close curve analysis, the modified driving waveform suitable for the open dielectric structure was proposed.

• KIISE Transactions on Computing Practices
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• v.23 no.4
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• pp.250-255
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• 2017

Given the explosion of genomic data and expansion of applications such as precision medicine, the importance of efficient genome-database management continues to grow. Traditional compression techniques may be effective in reducing the size of a database, but a new challenge follows in terms of performing operations such as comparison and searches on the compressed database. Based on that many genome databases typically have numerous duplicated or similar sequences, and that the runtime of genome analyses is normally proportional to the number of sequences in a database, we propose a technique that can compress a genome database by eliminating similar entries from the database. Through our experiments, we show that we can remove approximately 84% of sequences with 1% similarity threshold, accelerating the downstream classification tasks by approximately 10 times. We also confirm that our compression method does not significantly affect the accuracy of taxonomy diversity assessments or classification.

• Journal of Digital Convergence
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• v.14 no.4
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• pp.349-353
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• 2016

The studies on the human environment and ecosystem analysis is being actively researched. In recent years, The service of genome analysis has been offering the customized service to prevent the disease as reading an individual's genome information. The genome information by analyzing technology is being required accurate and fast analyses of ecosystem-dielectrics due to the spread of the disease, the use of genetically modified organism and the influx of exotic. In this paper the algorithm of K-Mean clustering for a new classification system was utilized. It will provide new dielectrics information as quickly and accurately for many biologists.

• Korean Journal of Microbiology
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• v.51 no.4
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• pp.329-337
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• 2015

All known genomes (N=10) in the order Nitrosomonadales were analyzed to contain 9,808 and 908 gene clusters in their pan-genome and core genome, respectively. Analyses with reference genomes belonging to other orders in Betaproteobacteria revealed that sizes of pan-genome and core genome were dependent on the number of genomes compared and the differences of genomes within a group. The sizes of pan-genomes of the genera Nitrosomonas and Nitrosospira were 7,180 and 4,586 and core genomes, 1,092 and 1,600, respectively, which implied that similarity of genomes in Nitrosospira were higher than Nitrosomonas. The genomes of Nitrosomonas contributed mostly to the size of the pan-genome and core genomes of Nitrosomonadales. COG analysis of gene clusters showed that the J (translation, ribosomal structure and biogenesis) category occupied the biggest proportions (9.7-21.0%) among COG categories in core genomes and its proportion increased in the group which genetic distances among members were high. The unclassified category (-) occupied very high proportions (34-51%) in pan-genomes. Ninety seven gene clusters existed only in Nitrosomonadales and not in reference genomes. The gene clusters contained ammonia monooxygenase (amoA and amoB) and -related genes (amoE and amoD) which were typical genes characterizing the order Nitrosomonadales while they contained significant amount (16-45%) of unclassified genes. Thus, these exclusively-conserved gene clusters might play an important role to reveal genetic specificity of the order Nitrosomonadales.

• Electrical & Electronic Materials
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• v.10 no.5
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• pp.492-499
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• 1997

• Journal of Scientific & Technological Knowledge Infrastructure
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• s.3
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• pp.48-61
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• 2000

유전체(genome)란 용어는 H.Winker가 1970년에 반수성 염색체구조를 표현하기 위하여 처음으로 사용하였다. 이것은 배우자에 들어 있는 유전자 전체를 의미하며 Gene + Chromosome의 합성어다. Gee는 유전자를 의미하고 Chromosome은 유전자의 형체를 의미하기 때문에 유전체(Genome)라고 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.30-32
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• 2012

본 논문에서는 고성능 컴퓨팅 환경에서 유전체 서열 분석 도구들을 벤치마크 하기 위한 시스템을 개발하고 실제 유전체 데이터를 이용하여 성능을 비교하였다. 이 벤치마크 시스템은 유전체 분석 파이프라인 절차에 따라 다양한 분석 도구들을 CPU 멀티 코어와 GPU 매니 코어 환경에서 선택적으로 구동할 수 있도록 지원한다. 따라서, 서로 다른 환경에서 수행된 다양한 유전자 분석 도구의 성능을 실제 유전체 서열 데이터를 이용하여 비교하고 시각화할 수 있다.

• Proceedings of the Materials Research Society of Korea Conference
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• 2000.11a
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• pp.80-80
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• 2000

차세대 대화면 평판 디스플레이에서 가장 주목을 받고 있는 디스플레이 소자는 PDP라고 할 수 있다. PDP 패널 제조 공정 기술에서 난해한 공정 중 하나인 투명 유전체 제조 공정은 현재까지 인쇄법에 의한 연구가 주로 진행되어 왔다. 그러나 인쇄법은 여러 번의 인쇄와 건조, 소성이 반복되어야 함으로써 유전체 제조에 있어서 복잡한 제조 공정이므로 대폭 단순화할 필요가 있다. 이에 대한 해결책으로서 제시된 것이 tape casting을 이용한 건식 공정이다. 본 연구에서는 tape casting용 slurry에 포함되는 유기물인 binder, plasticizer, solvent의 변화에 따른 dry film의 특성 및 소성 조건에 따른 유전체 특성에 관하여 조사하였다. PbO-SiO$_2$-B$_2$O$_3$계 유리 분말과 유기 vehicle을 ball mill을 이용하여 분산, 혼합하여 tape casting용 slurry를 제조하고, 이 slurry를 doctor blade법으로 tape를 제조하고 건조한 후 유리기판에 transfer한 후 소성하였다. Slurry의 조건과 소성 조건에 따른 투광성, 표면 조도 및 단면의 미세구조 등 투명 유전체의 특성을 평가하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.829-831
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• 2003

오늘날 생물정보기술의 발달은 유전체 연구의 활성화에 지대한 영향을 미치고 있으며, 작게는 소그룹 규모의 연구에서부터 크게는 지리적으로 떨어진 국가적인 협업의 형태로 연구가 진행 중이다. 이처럼 지리적으로 분산되어 있는 연구 그룹의 경우 서로의 연구 자료나 실험데이터들을 효과적으로 공유하고 교환 할 수 있는 도구의 지원이 필요하다. 또한, 유전체 연구 전략에 대한 기본 지침서나 구성원들의 통합 일정 관리를 지원함으로써 연구의 효율을 향상시킬 수 있는 방법의 모색이 요구된다. 본 논문에서는 유전체 연구자들의 효과적인 연구 진행을 도와주며. 연구 참여자 및 연구 초연생들이 용이하게 유전체 연구에 참여하며 따를 수 있도록 다양한 유전체 지원 도구를 제공하는 웹기반 협업지원 시스템인 BioPlace의 개발에 대하여 기술한다.