• 제목/요약/키워드: Higher Informatics Science

검색결과 152건 처리시간 0.02초

Classification of Human Papillomavirus (HPV) Risk Type via Text Mining

  • Park, Seong-Bae;Hwang, Sohyun;Zhang, Byoung-Tak
    • Genomics & Informatics
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    • 제1권2호
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    • pp.80-86
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    • 2003
  • Human Papillomavirus (HPV) infection is known as the main factor for cervical cancer which is a leading cause of cancer deaths in women worldwide. Because there are more than 100 types in HPV, it is critical to discriminate the HPVs related with cervical cancer from those not related with it. In this paper, the risk type of HPVs using their textual explanation. The important issue in this problem is to distinguish false negatives from false positives. That is, we must find high-risk HPVs as many as possible though we may miss some low-risk HPVs. For this purpose, the AdaCost, a cost-sensitive learner is adopted to consider different costs between training examples. The experimental results on the HPV sequence database show that the consideration of costs gives higher performance. The improvement in F-score is higher than that of the accuracy, which implies that the number of high-risk HPVs found is increased.

Methods of Automated Analysis of Curricula According to the Higher Education Standard

  • Liudmyla Omelchuk;Andrii Kryvolap;Taras Panchenko;Nataliia Rusina;Olena Shyshatska;Oleksii Tkachenko
    • International Journal of Computer Science & Network Security
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    • 제23권11호
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    • pp.32-42
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    • 2023
  • The paper describes the new approaches to the automated analysis of curricula according to the higher education standard. The analysis process is proposed to carry out in two ways: (a) the analysis of completeness and sufficiency of curricula according to the standard of higher education; (b) the comparison of curricula of the same qualification and specialty. The problem of improving the quality of university students' training launches the process of monitoring and analyzing educational curricula and their correspondence to the higher education standard. We developed the rules and methods to compare curricula. In addition, we implemented the automated system of curricula comparison. The paper reveals the use of these methods based on the analysis of the curriculum bachelor level of higher education "Informatics", specialty "Computer science", at the Faculty of Computer Science and Cybernetics of the Taras Shevchenko National University of Kyiv. The findings put towards the idea that the implementation of developed methods as well as the automated system of curricula analysis will improve the educational services by higher education institutions.

닭의 경제 형질에 미치는 TSH-β 유전자 변이 효과 분석 (Effects of SNP in TSH-β Gene of Chicken on Economic Traits)

  • 서주희;오재돈;최은지;임희경;성지연;송기덕;이준헌;이학교;공홍식;전광주;손영곤;최강덕
    • 한국가금학회지
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    • 제40권2호
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    • pp.115-120
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    • 2013
  • 갑상선호르몬(TH)은 가금의 성장에서 중요한 유전자로 보고되었다. TH의 생성과 분비를 조절하는 갑상선자극호르몬(TSH)은 ${\alpha}$-subunit와 ${\beta}$-subunit으로 구성되어 있으며, ${\beta}$-subunit의 다양한 특징에 의해 갑상선자극호르몬이 특이적인 활성을 보이는 것으로 알려져 있다. TSH-${\beta}$는 닭의 26번 염색체에 존재하며, 성장과 연관되어 있다고 밝혀졌다. 따라서 본 연구는 TSH-${\beta}$ 유전자의 G1031C 변이지역과 닭(한국재래닭, 로드아일랜드 레드, 코니쉬)의 경제 형질과의 연관성 분석을 실시하였다. 분석 결과, 로드아일랜드 레드 품종에서는 모든 개체에서 GG 유전자형이 확인되었고, 재래닭의 경우 모든 경제 형질과에서 유의적 연관성이 확인되지 않았다. 반면, 코니쉬 품종은 150 일령 몸무게에서 유의적인 연관성(p<0.05)이 확인되었다. TSH-${\beta}$ 유전자는 성장 형질과 밀접한 연관관계를 가지고 있는 유전자로 사료되지만, 유전자의 G1031C 변이지역은 성장 형질과 관련된 직접적인 연관관계는 없는 것으로 사료된다. 하지만 몸무게와 관련된 주요 유전자 또는 변이지역과 유전적으로 연관되어 있을 가능성은 충분히 높은 것으로 판단된다. 따라서 닭의 26번 염색체의 성장 관련 QTL 영역 내에 존재하는 유전자와 유전변이지역에 대한 추가적인 분석을 통해 성장 관련 주요 유전자 탐색 및 유전표지 발굴이 가능할 것으로 사료된다.

Asymmetric RTS/CTS for Exposed Node Reduction in IEEE 802.11 Ad Hoc Networks

  • Matoba, Akihisa;Hanada, Masaki;Kanemitsu, Hidehiro;Kim, Moo Wan
    • Journal of Computing Science and Engineering
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    • 제8권2호
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    • pp.107-118
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    • 2014
  • One interesting problem regarding wireless local area network (WLAN) ad-hoc networks is the effective mitigation of hidden nodes. The WLAN standard IEEE 802.11 provides request to send/clear to send (RTS/CTS) as mitigation for the hidden node problem; however, this causes the exposed node problem. The first 802.11 standard provided only two transmission rates, 1 and 2 Mbps, and control frames, such as RTS/CTS assumed to be sent at 1 Mbps. The 802.11 standard has been enhanced several times since then and now it supports multi-rate transmission up to 65 Mbps in the currently popular 802.11n (20 MHz channel, single stream with long guard interval). As a result, the difference in transmission rates and coverages between the data frame and control frame can be very large. However adjusting the RTS/CTS transmission rate to optimize network throughput has not been well investigated. In this paper, we propose a method to decrease the number of exposed nodes by increasing the RTS transmission rate to decrease RTS coverage. Our proposed method, Asymmetric Range by Multi-Rate Control (ARMRC), can decrease or even completely eliminate exposed nodes and improve the entire network throughput. Experimental results by simulation show that the network throughput in the proposed method is higher by 20% to 50% under certain conditions, and the proposed method is found to be effective in equalizing dispersion of throughput among nodes.

Calcium Channel-blocking Activity of Chinese Balloon Flower (Platycodon grandiflorum) for Producing Blood Pressure-lowering Functional Foods

  • Kang, Yoon-Seok;Hong, Kwon-Pyo;Jung, Dong-Chae;Hong, Sung-Won;Lee, Jun-Ho;Nah, Seung-Yeal;Lim, Yoong-Ho;Bae, Dong-Ho
    • Food Science and Biotechnology
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    • 제17권1호
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    • pp.156-160
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    • 2008
  • This study was conducted to evaluate the hypotensive properties of the extract of Chinese balloon flower (Platycodon grandiflorum)'s root. In the studies for calcium channel-blocking using Xenopus oocytes, the ethanol-extract ($26.2{\pm}5.2%$) showed higher activity than water-extract. Twenty female rats were fed 25, 35, and 45 mg/kg BW/day of the ethanol-extract for 14 days to observe the changes in blood pressures and heart pulses. Ethanol-extract decreased the systolic, diastolic, and mean blood pressures of the rats. Especially, the rats fed with 45 mg/kg BW/day of the ethanol-extract showed significant decreases in the blood pressures. These results suggested that a decrease in blood pressures was due to the extension of a blood vessel with calcium channel-blocking by ethanol-extract of Chinese balloon flower. Forty %-ethanol showed the highest efficiency for ethanol-extraction of Chinese balloon flower.

BEHAVIOR OF SOLUTIONS OF A RATIONAL THIRD ORDER DIFFERENCE EQUATION

  • ABO-ZEID, R.
    • Journal of applied mathematics & informatics
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    • 제38권1_2호
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    • pp.1-12
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    • 2020
  • In this paper, we solve the difference equation $x_{n+1}={\frac{x_nx_{n-2}}{ax_n-bx_{n-2}}}$, n = 0, 1, …, where a and b are positive real numbers and the initial values x-2, x-1 and x0 are real numbers. We also find invariant sets and discuss the global behavior of the solutions of aforementioned equation.

Application of the Chebyshev-Fourier Pseudo spectral Method to the Eigenvalue Analysis of Circular Mindlin Plates with Free Boundary Conditions

  • Lee, Jinhee
    • Journal of Mechanical Science and Technology
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    • 제17권10호
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    • pp.1458-1465
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    • 2003
  • An eigenvalue analysis of the circular Mindlin plates with free boundary conditions is presented. The analysis is based on the Chebyshev-Fourier pseudospectral method. Even though the eigenvalues of lower vibration modes tend to convergence more slowly than those of higher vibration modes, the eigenvalues converge for sufficiently fine pseudospectral grid resolutions. The eigenvalues of the axisymmetric modes are computed separately. Numerical results are provided for different grid resolutions and for different thickness-to-radius ratios.

A STUDY ON A NONPARAMETRIC TEST FOR THE PARALLELISM OF k REGRESSION LINES AGAINST ORDERED ALTERNATIVES

  • Jee, Eun-Sook
    • Journal of applied mathematics & informatics
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    • 제8권2호
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    • pp.669-682
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    • 2001
  • In this paper a nonparametric test for the parallelism of k regression lines against ordered alternatives, when the independent variables are positive and all regression lines have a common intercept is proposed. The proposed test is based on a Jonckheere-type statistic applied to residuals. Under some conditions the proposed test statistic is asymptotically distribution-free. The small-sample powers of our test are compared with other tests by a Monte Carlo study. The simulation results show that the proposed test has significantly higher empirical powers than the other tests considered in this paper.

Higher Order Knowledge Processing: Pathway Database and Ontologies

  • Fukuda, Ken Ichiro
    • Genomics & Informatics
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    • 제3권2호
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    • pp.47-51
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    • 2005
  • Molecular mechanisms of biological processes are typically represented as 'pathways' that have a graph­analogical network structure. However, due to the diversity of topics that pathways cover, their constituent biological entities are highly diverse and the semantics is embedded implicitly. The kinds of interactions that connect biological entities are likewise diverse. Consequently, how to model or process pathway data is not a trivial issue. In this review article, we give an overview of the challenges in pathway database development by taking the INOH project as an example.

ERROR ESTIMATION OVER THE POLYGONAL DOMAINS BY THE FINITE ELEMENT METHOD

  • Kim, Chang-Geun
    • Journal of applied mathematics & informatics
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    • 제9권1호
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    • pp.311-320
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    • 2002
  • For second order linear elliptic problems over smooth domains, it is well known that the rate of convergence of the error in the $L_2$norm is one order higher than that in the $H^1$norm. For polygonal domains with reentrant corners, it has been shown in [15] that this extra order cannot be fully recovered when the h-version is used. We present theoretical and computational examples showing the sharpness of our results.