• International journal of advanced smart convergence
• /
• v.10 no.3
• /
• pp.163-171
• /
• 2021

Recently, Machine Learning-based visualization approaches have been proposed to combat the problem of malware detection. Unfortunately, these techniques are exposed to Adversarial examples. Adversarial examples are noises which can deceive the deep learning based malware detection network such that the malware becomes unrecognizable. To address the shortcomings of these approaches, we present Block-matching and 3D filtering (BM3D) algorithm and deep image prior based denoising technique to defend against adversarial examples on visualization-based malware detection systems. The BM3D based denoising method eliminates most of the adversarial noise. After that the deep image prior based denoising removes the remaining subtle noise. Experimental results on the MS BIG malware dataset and benign samples show that the proposed denoising based defense recovers the performance of the adversarial attacked CNN model for malware detection to some extent.

• Journal of applied mathematics & informatics
• /
• v.40 no.5_6
• /
• pp.813-830
• /
• 2022

The generating functions of the divisor function σ_s(n) = Σ_0<d|n d^s are quasimodular forms. In this paper, we find the basis of the space of quasimodular forms of weight 6 on Γ₀(10) consisting of Eisenstein series and η-quotients. Then we evaluate the convolution sum Σ_ak+bl+cm=n σ(k)σ(l)σ(m) with lcm(a, b, c) = 10 and Σ_al+bm=n lσ(l)σ(m) and Σ_al+bm=n σ₃(l)σ(m) with lcm(a, b) = 10.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2023.01a
• /
• pp.47-49
• /
• 2023

사회적으로 복잡한 문제들이 시공간 형태로 문제 표현이 가능하고 이를 활용하여 문제를 해결하기 위한 연구들이 진행 중이다. 특히, 시뮬레이션 이론 중 하나인 BM-DEVS는 시공간 논리를 적용하여 실세계에서 일어나는 문제들을 시공간 규칙으로써 표현하였고 이를 모델에 적용하여 시스템에서 행위를 모니터링한다. 하지만 BM-DEVS에서는 시스템 차원에서 정의된 시공간 규칙들을 평가하기 위하여 Büchi 오토마타로의 변환과 오토마타를 모델들에 반영할 수 있어야 한다. 이를 위하여 시스템을 구축하는 모델러가 직접 규칙을 오토마타로 변환하는 작업을 해야하며 이에 대한 오토마타를 모델에 적용하기까지는 많은 시간이 소요된다. 이러한 문제를 해결하기 위해 본 논문에서는 모델링의 단순화를 위하여 시공간 규칙을 모델들에 자동적으로 적용하는 방법에 대하여 소개한다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2023.11a
• /
• pp.458-460
• /
• 2023

가공식품이라는 특정 도메인에서는 기존 검색엔진에서 많이 활용되는 BM25 만을 가지고 최저가 검색하는 데는 어려움이 있다. 본 논문에서는 BM25 외에도 검색의 정확성을 높이기 위해 HuggingFace 에 공개되어 있는 KoELECTRA 를 활용하여 개체명 인식(Named Entity Recognition 과 이진 분류모델(Binary Classification)을 Fine-tuning 하고 BM25 와 연계하여 구축한 검색시스템을 제안한다. 기존의 BM25 대비 성능 평가를 통해 효과를 검증하였다.

• The Inventors News
• /
• no.27
• /
• pp.2-2
• /
• 2004

BM 특허출원 지속적인 증가 추세 유지 - 휴대폰 게임관련 특허출원 회복세 뚜렷 - 특허침해소송 2심 전속관할 통해 국가경쟁력 강화 - 데이콤 캐드넷 BM 특허 획득 - 수자원공사 인재육성 시스템 특허 획득

• Proceedings of the Korea Society of Information Technology Applications Conference
• /
• 2007.11a
• /
• pp.129-129
• /
• 2007

• Korean journal of applied entomology
• /
• v.35 no.4
• /
• pp.321-325
• /
• 1996

To isolate a novel gene for antibacterial peptide, an inducible clone(BmInc8) was selected by differential screening strategy from Bombyx mori cDNA library prepared from lavae injected with Escherichia coli. This clone contained a cDNA insert of 564 nucleotides and encoded 59 amino acids with an apparent molecular mass of 6.3 kDa. The cDNA sequence of BmInc8 had 61.2% identity compared to that of the bactericidin from Manduca sexta and also the deduced amino acids sequences from this insert had 65% identity compared to that of the cecropin D peptide Hyalophora cecropia. The transient expression assay of this insert using prokaryotic expression vector system revealed that the expressed peptide displayed the antibacterial activity. The cDNA sequence was deposited in GenBank under the accession number U30289.

• Journal of IKEEE
• /
• v.3 no.1 s.4
• /
• pp.69-78
• /
• 1999

In this paper, direct conversion receiver was designed to even harmonic anti-paralled diode pair ring mixer. Using a second harmonic component of LO instead of LO signal and RF signal are mixed by SHP(Sub Harmonic Pumped) mixer with anti-parallel diode pair. Canceling the harmonics of LO signal in ring mixer, SHP mixer using anti-parallel diode pair could mostly reduce the radiation of LO signal through a input port the most, good isolation characteristic, and low spurious characteristic by LO signal was shown over broad band. The produced SHP mixer showed LO/IF, RF/IF and LO/RF isolation was 24.6dB,36.2dB and 22.5dB respectively. And conversion loss was measured 15.6dB, IF output -35.6dBm with -20dBm RF input and 5.5dBm LO signal. 1dB compression point of If signal, in respect to RF signal, was found at the 0dbm RF signal.

• IMMUNE NETWORK
• /
• v.9 no.1
• /
• pp.27-33
• /
• 2009

Macrophages generated in vitro using macrophage-colony stimulating factor (M-CSF) and interleukin (IL)-6 from bone marrow cells (BM-Mp) are defective in antigen presenting cell (APC) function as shown by their ability to induce the proliferation of anti-CD3 mAb-primed syngeneic T cells. However, they do express major histocompatibility (MHC) class I and II molecules. accessory molecules and intracellular adhesion molecules. Here we demonstrate that the defective APC function of macrophages is mainly due to production of $TGF-{\beta}1$ by BM-Mp. Methods: Microarray analysis showed that $TGF-{\beta}1$ was highly expressed in BM-Mp, compared to a macrophage cell line, B6D. which exerted efficient APC function. Production of $TGF-{\beta}1$ by BM-Mp was confirmed by neutralization experiments of $TGF-{\beta}1$ as well as by real time-polymerase chain reaction (PCR). Results: Addition of $anti-TGF-{\beta}1$ monoclonal antibody to cultures of BM-Mp and anti-CD3 mAb-primed syngeneic T cells efficiently induced the proliferation of syngeneic T cells. Conversely, the APC function of B6D cells was almost completely suppressed by addition of $TGF-{\beta}1$. Quantitative real time-PCR analysis also confirmed the enhanced expression of $TGF-{\beta}1$ in BM-Mp. Conclusion: The defective APC function of macrophages generated in vitro with M-CSF and IL-6 was mainly due to the production of $TGF-{\beta}1$ by macrophages.

• Journal of Information Technology Applications and Management
• /
• v.22 no.3
• /
• pp.65-81
• /
• 2015

This study reports a preliminary finding of the types and numbers of graphs being presented in the annual reports of about thirty top listed companies trading publicly in the stock markets of three countries-Thailand (SET), Malaysia (BM), and Singapore (SGX)-that were chosen based on their inclusion in the ASEAN Stars Index under the ASEAN Trading Link project. A total of 6,753 graphs from nineteen sectors were extracted and examined. Banking, real estate, and telecommunications are ranked the three most condense sectors, accounting for 50.2% of the total number of graphs observed. The three most used graphs are the Conservative Bar, Donut graph and Stack Bar. Less than one percent of Infographic type graphs were used. The five most depicted graphed variables are Asset, Revenue, Net profit, Liability, and Dividend. Using rudimentary framework to detect distorted or misleading statistical graphs, the study found 60.6% of the graphs distorted across the three markets, SET, BM, and SGX. BM ranked first in percentages of graphs being distortedly presented (73%). The other two markets, SET and SGX, have about the same proportions, 53.88% and 53.03%, respectively. Likewise, the proportions of Well-designed versus Inappropriate-designed graphs of the latter two markets are a little over one time (SET = 1 : 1.17; SGX = 1 : 1.13), whereas the proportion is almost triple for the BM market (BM = 1 : 2.70). In addition, the trend of distorted graphs found is slightly increasing as the longevity of the ASEAN Stars Index increases. One possible explanation for the relatively equal proportion of inappropriate graphs found is that SET is the smallest market and SGX, though the largest, is the most regulated market. BM, on the other hand, may want to present their financial data in the most attractive manner to prospective investors, thus, regulatory constraints and governance structure are still lenient.