• 대한수학회지
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• 제59권2호
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• pp.299-309
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• 2022

Let k ⩾ 2 be an integer, S^k = {1^k, 2^k, 3^k, …} and B = {b₁, b₂, b₃, …} be an additive complement of S^k, which means all sufficiently large integers can be written as the sum of an element of S^k and an element of B. In this paper we prove that $${{\lim}\;{\sup}}\limits_{n{\rightarrow}{\infty}}\;{\frac{{\Gamma}(2-{\frac{1}{k}})^{\frac{k}{k-1}}{\Gamma}(1+{\frac{1}{k}})^{\frac{k}{k-1}}n^{\frac{k}{k-1}}-b_n}{n}}\;{\geqslant}\;{\frac{k}{2(k-1)}}\;{\frac{{\Gamma}(2-{\frac{1}{k}})^2}{{\Gamma}(2-{\frac{2}{k}})}},$$ where 𝚪(·) is Euler's Gamma function.

• 한국통신학회논문지
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• 제13권4호
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• pp.332-339
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• 1988

최근에 소개된, 순가산성 잡음뿐만 아니라 신호의존성 잡음과 적산성 잡음도 나타낼 수 있는 일반화된 관측모델을 이용하여 신호의존성 잡음이 있을 때 약한 확률적 신호를 검파하는 문제를 다루었다. 신호의존성 잡음이 있을 경우, 약한 확률적 신호를 검파하기 위한 국소최적 검파기의 검정통계량은 순가산성 잡음만 있을 때의 국소최적 검파기의 검정 통계량이 확장된 것임을 보였다. 이는 이미 발표된 적산성 잡음에서의 약한 확률적 신호 검파의 경우와 비슷한 상황이다.

• 한국임상약학회지
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• 제23권2호
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• pp.97-105
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• 2013

Background: This study was aimed to establish the systematic management methods of tar color additives used in Korea for drugs and quasi-drugs. Although tar color additives have been used in various areas, safety problems are continuously being reported by several studies. For that reason, major countries like US, Japan, Europe are trying to update the safety information of tar color additives and the related management methods, and Korea also need to complement them based on the updated information for their safer use. Method: This report includes the compared information of all legally used tar color additives of each country, such as color additive name, compound name and chemical abstracts service registry number. Conclusion: It is expected that these investigated results will be useful as the basic materials for proper management guidelines of tar color additives in Korea.

• 한국정보시스템학회지:정보시스템연구
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• 제26권3호
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• pp.273-293
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• 2017

Purpose The purpose of this study is to introduce a framework that helps Muslims to determine whether a food can be consumed. It can complement existing Halal food classification services having a difficulty of constructing Halal food database. Design/methodology/approach The proposed framework includes two components. First, OCR(Optical Character Recognition) technique is utilized to read the food additive information. Second, machine learning methods were used to trained and predicted to determine whether a food can be consumed using the provided information. Findings Among the compared machine learning methods, SVM(Support Vector Machine), DT(Decision Tree), and NB(Naive Bayes), SVM with linear kernel and DT had excellent performance in the Halal food classification. The framework which adopting the proposed framework will enhance the tourism experiences of Muslim tourists who consider keeping the Islamic law most importantly. Furthermore, it can eventually contribute to the enhancement of smart tourism ecosystem.

• 한국산업융합학회 논문집
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• 제27권2_2호
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• pp.371-375
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• 2024

Epoxy resins are widely used in various fields due to their high adhesion, mechanical strength, and solvent resistance. However, as the volume decreases during the hardening process and the cooling process after hardening, stress is generated and when an external force is applied, the brittle material exhibits destruction behavior. To complement this, research has been conducted using inorganic nanofillers such as halloysite nanotube(HNT). HNT has a nanotube structure with the chemical formula of Al₂Si₂O₅(OH)₄·nH₂O and is a natural sediment of aluminosilicate. It has been used as additive to improve the mechanical properties of epoxy composites with exchange of amine group as a terminal functional group. In order to simplify complicated procedures of common wet method, a dry coating machine was designed and used for amine group exchange in previous research. In this study, they were applied as filler in epoxy composites, and mechanical properties such as tensile strength and flexural strength of composites were examined.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 동계학술발표대회 논문집
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• pp.369-374
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• 2008

This study is an inorganic foaming ceramic by sol-gel reaction in order to overcome weak point of insulator using in construction equipment. We shall be able to confirm as the existing product substitute is possible result of this study. The solution where the silicate, the ceramic powder and the additive are included which makes foaming ceramic slurry, then the insulator made by used $CO_2$ Sol-Gel reaction. There being will be able to manufacture the insulator where the economical efficiency is excellent confirmed at the start product which is completed. The recording gel time decreases when the silicate will increase. Uses the hydrogen peroxide and fe make foam, when additionally surface preparation the fluorine resin, the water tolerance increases and will be able to complement the weak point of the silicate which omits in the water. The case which will use the loess powder with the research method which sees specially was environment-friendly product and according to appearing, the physical properties of nonflammability.

• KSBB Journal
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• 제28권6호
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• pp.372-379
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• 2013

This study was to investigate the chemical properties and nitrite scavenging and acetylcholinesterase inhibitory activities from Salicornia herbaciea seed. The lactic acid content of seed was about 2.0 fold higher than that of stem. Among various free sugars, the maximum fructose of seed, glucose of stem, and mannose contents of root were obtained, 176.3, 125.6, and 112.8 mg/100g, respectively. The maximum leucine content of seed among the essential amino acid was obtained, 853.7 mg/100g, which was about 3.0 or 6.0 folds higher than that of root or stem. In the case of glutamic acid of seed, it was 2,388.7 mg/100g, which was 5.6 or 9.8 folds higher han that of root or stem. The ratio of essential amino acid and total amino acid of seed was 30.14%. The ${\gamma}$-aminobutyric acid contents of seed, stem, and root were 43.87, 23.88, and 27.8 mg/100g, respectively. The catechin content of seed was an order of epigallocatechin (723.2 mg/100g) > epigallocatechingallate (654.3 mg/100g) > epicatechin (443.5 mg/100g) > gallocatechin (314.1 mg/100g). Especially, the non-gallated catechins content was about 2.0 folds higher than that of gallated catechins content. The nitrite scavenging activity of seed increased from 38.7 to 65.9% when the hot-water extract content of seed at pH 1.2 increased from 1.0 to 5.0 mg/mL. However, it was decreased to 25.7% at pH 6. The acetylcholinesterase inhibitory activity of seed was increased from 13.2 to 44.6% when the extract content increased from 20 to 100 mg/mL. These results show that S. herbaciea seed has a good potential to be used as a source of material or additive in cosmetics, food, and drug compositions.

• 대한한방내과학회지
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• 제36권4호
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• pp.547-561
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• 2015

Objectives In this study, we divided Korean asthma patients into excess syndrome or deficiency syndrome groups according to clinical phenotype. Genetic analysis was conducted to investigate the association of exonic SNPs in the CD46 gene polymorphism with the clinical phenotype based on the differentiation syndrome of the bronchial asthma patients.Methods There were 95 healthy patients (control group) and 53 asthma patients. (The deficiency syndrome group included 24 and the excess syndrome group 29). We searched the exonic areas of the CD46 gene in the NCBI website SNPs with <0.01 minor allele frequency (MAF) and <0.01 heterozygosity. We finally selected two SNPs: rs138843816, Ser13Phe and rs7144, 3’-UTR. Hardy-Weinberg equilibrium was calculated using SNPStats.Results There were significant differences in the codominant 1 model and the dominant model between the healthy group and the asthma group. There were significant differences between deficiency syndrome group and the excess syndrome group in the genotype frequencies and in the codominant 1 model, the dominant model, and the log-additive model. The allele frequency of rs7144C showed a significant difference between the deficiency syndrome group and the excess syndrome group. Two-SNP haplotype analysis showed a significant difference in frequency in the deficiency syndrome group and in the excess syndrome group. There were significant differences between the healthy group and the excess syndrome group in the codominant 1 model, the dominant model, and the log-additive model. The frequency of the rs7144 C allele exhibited a significant difference in the demonstration. SNP haplotype analysis between the healthy group and the excess syndrome group showed a significant difference in the frequency of the CT haplotype and the CC haplotype.Conclusions The results indicate that two CD46 SNPs (rs138843816, Ser13Phe and rs7144, 3′–UTR) might be associated with the symptomatic excess syndrome in Korean asthma patients.

• 만화애니메이션 연구
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• 통권33호
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• pp.597-616
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• 2013

캐릭터산업은 저작권리를 중심으로 한 지식기반산업이면서 제조업과 서비스업의 판매가치를 촉진시키고 매출효과를 강화하는 보완재적 산업특성을 지니고 있어서 전 산업분야에 걸쳐 기능적으로 작동될 수 있는 창조경제의 핵심동력이다. 2003년부터 시작된 정부의 캐릭터관련 정책은 연관산업간의 연계효과 극대화, 국내 캐릭터의 해외진출확대, 유통구조 개선을 통한 저작권 강화, 캐릭터상품의 질적강화를 통한 산업기반 확대 등에 중점을 두었다. 이러한 정책성과로 인해, 2007년 이후, 연관콘텐츠의 성공사례가 구체화되기 시작했고, 국내외 캐릭터산업은 보다 체계적인 진화과정을 거치게 된다. 창작캐릭터의 자체적인 산업육성 노하우가 축적되고, 만화, 애니메이션, 게임, 소설, 영화, 뮤지컬 등으로 시작된 연관캐릭터가 시장세분화전략에 의해 활성화되면서 캐릭터산업의 범위 및 산업적 통계의 재설정이 요구되기 시작했다. 특히, 2009년 이후 정부는 '세계 5대 캐릭터 강국'으로의 목표를 설정하고, 글로벌 스타캐릭터 발굴, 연관산업간 네트워크 구축지원, 홍보채널 다양화 및 프로모션 강화, 라이선싱 비즈니스 활성화 등의 정책을 발굴하게 된다. 특히, 2013년을 기점으로 캐릭터를 활용한 캐릭터 체험전 등의 전시시장, 키즈카페 등의 시간관리형 캐릭터 실내테마파크, SNS의 이모티콘을 중심으로 한 디지털캐릭터 수요시장, 캐릭터 뮤지컬을 중심으로 한 공연시장 등 새로운 캐릭터시장이 지속적으로 개발되고, 기존 오프라인의 불법복제시장이 국내외적으로 대형화되면서 그에 따른 체계적인 정책대안이 필요하게 되었다. 진화하는 캐릭터 소비시장과 플랫폼 다양화 시대에 대응하여, 캐릭터산업을 활성화시키고 새로운 캐릭터디자인 및 관련 콘텐츠를 지원하기 위해서는 캐릭터산업의 정책변인을 전제로 한 전략방향의 입체적 설정이 요구된다. 지난 정부의 정책성과와 국내외 캐릭터산업의 시장현황, 그리고 진화방향을 분석하여 정책변인을 구체화시키면 다음과 같다. 현재 국내캐릭터산업의 정책변인은 플랫폼 다양화에 따른 디지털 캐릭터시장의 소비다층화, 한류중심의 캐릭터상품 융합콘텐츠화, 불법콘텐츠의 지하경제 양성화, 세분화된 시장의 수용자 편향성관리 등으로 분석되며, 이는 미국과 일본 및 유럽의 기존 캐릭터산업 강국들과는 다른 차원의 정책이슈를 발굴하게 된다. 결국 국내외시장의 연관콘텐츠 저작권계약 모델개발, 플랫폼 경제의 수익모델 다각화, 한류확대에 연계된 목표시장 추가개발, 평생캐릭터의 연령별 맞춤형 시장전략 등이 캐릭터 수요시장진화에 따른 대안으로 제시된다.