• Title, Summary, Keyword: ${\lambda}$-추출

Search Result 58, Processing Time 0.061 seconds

Fourier transform method of surface topography and interferometry (푸리에 변환을 이용한 파면위상의 복구)

  • 남기봉
    • Korean Journal of Optics and Photonics
    • /
    • v.3 no.1
    • /
    • pp.20-26
    • /
    • 1992
  • The fourier transform method of retrieving the phase of the test wavefront from a Twyman-Green interferometer was reviewed by numerical simulations and experiments. Of the two methods reviewed, Takeda's approach proved more reliable in reconstructing the deformation of the test surface. The application of this approach to a plane mirror showed the existence of the surface curvature, whose maximum deviation was about $\lambda$/6. The accuracy in the measurement was evaluated to be around $\lambda$/40.

  • PDF

${\lambda}$-calculus (${\lambda}$-연산 소개)

  • Cheong Kye-Seop
    • Journal for History of Mathematics
    • /
    • v.17 no.4
    • /
    • pp.45-64
    • /
    • 2004
  • The lambda calculus is a mathematical formalism in which functions can be formed, combined and used for computation that is defined as rewriting rules. With the development of the computer science, many programming languages have been based on the lambda calculus (LISP, CAML, MIRANDA) which provides simple and clear views of computation. Furthermore, thanks to the "Curry-Howard correspondence", it is possible to establish correspondence between proofs and computer programming. The purpose of this article is to make available, for didactic purposes, a subject matter that is not well-known to the general public. The impact of the lambda calculus in logic and computer science still remains as an area of further investigation.stigation.

  • PDF

Anti-Angiogenesis Effect and Cytotoxicity of Enterobacteria Isolated from Fusiform Fish

  • Lim, Jong-Kwon;Song, Min-Gyu;Shin, Jin-Hyuk;Lee, Se-Young;Kim, Jong-Deog
    • 한국생물공학회:학술대회논문집
    • /
    • /
    • pp.158-162
    • /
    • 2005
  • Enterobacteria, named ${\lambda}-bacteria$ isolated from fusiform fish, have strong anti-angiogenesis effect. ${\lambda}-28$ species bore higher anti-angiogenesis effect. Cultured liquid was performed salting out, dialysed and freezed dried. This sample was executed size exclusion chromatography with fraction collector. Anti-angiogenesis, cytotoxicity, and SDS-PAGE were carried out with fraction number. ${\lambda}-28$ species was lower toxicity against HUVECs and effective band was conformed with SDS-PAGE.

  • PDF

Pesticide residues in chili pepper seeds and their transfer into the seed oil (고추씨 중 농약 잔류와 고추씨 기름으로 농약의 이행)

  • Lee, Mi-Gyung;Kim, Jong Seong
    • Korean Journal of Food Science and Technology
    • /
    • v.48 no.4
    • /
    • pp.317-322
    • /
    • 2016
  • A pesticide mix solution containing difenoconazole, lambda-cyhalothrin, and lufenuron was applied 3 times on field grown chili pepper at a fivefold overdose dilution concentration of the spray solution at a pre-harvest interval of 7 day. Difenoconazole, lambda-cyhalothrin, and lufenuron were detected at 4.43, 0.334, and 1.56 mg/kg, respectively, in raw chili pepper. Washing with water reduced the residue levels to 91.4, 94.3, and 85.3%, respectively. In dried chili pepper, the residues of difenoconazole, lambda-cyhalothrin, and lufenuron were 22.2 mg/kg (processing factor, Pf =5.01), 1.65 mg/kg (Pf =4.94), and 6.54 mg/kg (Pf =4.19). In the seeds, difenoconazole and lambda-cyhalothrin were not detected, and lufenuron was detected at 0.0075 mg/kg (n=1) and <0.005 mg/kg (n=2). Thus the pesticide residues in the seeds was negligible. In the seed oil, difenoconazole and lufenuron residues were 0.0263 and 0.0295 mg/kg, respectively (concentration factors=5.26 and 4.72). These concentration factors supported the theoretical concentration factor of 6.8, assuming that all of compound present in the seed are transferred into the oil.

An Edge Detection for Face Feature Extraction using λ-Fuzzy Measure (λ-퍼지척도를 이용한 얼굴특징의 윤곽선 검출)

  • Park, In-Kue;Ahn, Bo-Hyeok;Choi, Gyoo-Seok
    • The Journal of The Institute of Internet, Broadcasting and Communication
    • /
    • v.9 no.4
    • /
    • pp.75-79
    • /
    • 2009
  • In this paper the method was proposed which uses ${\lambda}$-fuzzy measure to detect the edge of the features of the face region. In the conventional method the features was founded using valley, brightness and edge. This method had its drawbacks that it is so sensitive to the external noises and environments. This paper proposed ${\lambda}$-fuzzy measure to cope with this drawbacks. By considering each weight of the pixels the integral evaluation was considered using the center of area method. Thus the continuity of the edge was kept by way of the neighborhood information and the reduction of time complexity wad resulted in.

  • PDF

Modeling of Fine Cracks using Fuzzy Mathematical Morphology (퍼지 수학적 형태학을 이용한 미세균열 모델링)

  • Park, In-Kyoo;Choi, Gyoo-Seok
    • The Journal of The Institute of Internet, Broadcasting and Communication
    • /
    • v.10 no.5
    • /
    • pp.105-111
    • /
    • 2010
  • In this paper the elasticity of fault-detection algorithm based on fuzzy logic is proposed through lots of experiments, justifying its validity. The four mathematical morpholgical operators was defined to detect the cracks. The cracks was detected via center of area method with ${\lambda}$-fuzzy measure of fuzzy sets. However generally favorable, the result owes to how adequate the lighting device is designed in case of the so far fine crack of pieces. In an attempt to improve the response of the system, It is designed to minimize the use of memory via LookUp table in software.

Extraction Characteristics of Red Flower Cabbage Pigment (꽃양배추 색소의 추출특성)

  • Lee, Jang-Wook;Lee, Hyang-Hee;Rhim, Jong-Whan
    • Korean Journal of Food Science and Technology
    • /
    • v.33 no.1
    • /
    • pp.149-152
    • /
    • 2001
  • Extraction characteristics of anthocyanin pigment from red flower cabbage(Brassica oleracea L. var. acephala) as a new source of natural food colorant were investigated. The pigment extracted from red flower cabbage showed the characteristic bathochromic shift of the maximum wavelength of light absorption(${\lambda}_{max}$) as pH of the solution changed from pH 1 to 12. As the concentration of citric acid in the extraction solvent increased, extraction rate and total optical density(TOD) of the extract increased. Maximum TOD was obtained by using the extracting solvent including $0.8{\sim}1.0%$ citric acid and stable pigment solution was obtained by using the extracting solvent including $10{\sim}20%$ ethanol in distilled water. As a result, 10% ethanolic solution with 0.8% citric acid was decided as the optimum extraction solvent for the anthocyanin pigment from red flower cabbage. Within the experimental ranges, the extraction rate increased and therefore extraction time decreased as the extraction temperature increased. The times to reach a certain value of TOD i.e., 2.1 were 24, 8, 4 and 2 hours at extraction temperature of 5, 20, 40 and $60^{\circ}C$, respectively.

  • PDF

Extraction Method of Anthocyanin and Tannin Pigments in Colored Rice (유색미 안토시아닌계 및 탄닌계색소의 추출법)

  • Choi, Hae-Chune;Cho, Mi-Yeong;Kim, Soo-Un;Oh, Sea-Kwan
    • Applied Biological Chemistry
    • /
    • v.39 no.4
    • /
    • pp.327-331
    • /
    • 1996
  • This experiment was conducted to establish the efficient extraction condition for anthocyanin and tannin pigments contained in rice bran of colored rices. Efficiency of the pigment extraction was maximum when the concentration of mired solvent of methanol(3) : ethanol(7) was 70%. In purple rite(anthocyanin pigment), ‘Kilimheugmi’, 80% ethanol containing 0.5% malic acid showed the highest extraction efficiency and stability with a maximum absorbance wavelength$(\lambda_{max})$ at 538 nm. In red rice(tannin pigment), ‘Jagwangdo’, 80% ethanol containing 0.01% citric acid showed the highest extraction efficiency and stability with a maximum absorbance wavelength$(\lambda_{max})$ at 456 nm. The relative optical density of the pigments increased until the solvent temperature was reached at $70^{\circ}C$, but drastically decreased over at $90^{\circ}C$ due to color change. The higher amount of the pigment was ertracted from the longer shaking time of the solvent. Ten minutes was enough for the grinding time of rite bran in solvent. Supernatant of the pigment extractives after one day storage at $4^{\circ}C$ in dark chamber revealed higher optical density than the filtration of the pigment extractives.

  • PDF

Cloning of Reverse Transcriptase Gene of Avian Sarcoma Virus (역전사효소(逆轉寫酵素) 유전자(遺傳子)의 cloning 에 관(關)한 연구(硏究))

  • Kim, Yong-Woong;Kim, Kwang-Sik;Suh, Yong-Tack;Guntaka, R.V.
    • Applied Biological Chemistry
    • /
    • v.31 no.3
    • /
    • pp.219-225
    • /
    • 1988
  • Reverse transcriptase gene of Avian sarcoma virus(ASV) was cloned with a thermoinducible expression vector, pPL-lambda. E. coli N4830 which carries temperature sensitive cI857 la mbda repressor, was transformed with this pPL-pol plasmid DNA. The RNA transcribed by those tranoformants was isolated and analyzed. It was shown that the inserted reverse transcriptase gene of ASV was transcribed at high-level when cells were grown at high temperature.

  • PDF

Studies on Ion-Selective Crown Ether Dyes (이온선택성 크라운 에테르 염료에 관한 연구)

  • Sam-Woo Kang;Chong-Min Park;Won-Fae Koo;Keun-Jae Kim;Soo-Min Lee;Choo-Hwan Chang
    • Journal of the Korean Chemical Society
    • /
    • v.32 no.5
    • /
    • pp.443-451
    • /
    • 1988
  • New crown ether dye-Ⅰ and dye-Ⅱ having an azo group(-N=N-) were synthesized from monobenzo-15-crown-5 and dibenzo-18-crown-6. These dyes showed ${\lambda}_{max}$ of 377 and 383nm respectively. The complexes of alkali metal ions ($Na^+$, $K^+$, $Cs^+$) with dye ligands showed band shift (390~400nm) and intensity increased. For a given anion, the extraction constants are in the order of $K^+$ < $Cs^+$ < $Na^+$ for dye-Ⅰ and $Cs^+$ < $Na^+$ < $K^+$ for dye-Ⅱ. These results show that the selectivity of crown ethers toward the alkali metal ions is dependant on the charge density of cation and the size of crown ether cavity. For a given cation, the order of the extraction constant is $Cl^-$ < $Br^-$ < $I^-$ < picrate. This order coincides with the degree of anion solvation effect.

  • PDF