Three-point Functions in Sine-Liouville Theory

We calculate the three-point functions in the sine-Liouville theory explicitly. The same calculation was done in the (unpublished) work of Fateev, Zamolodchikov and Zamolodchikov to check the conjectured duality between the sine-Liouville and the SL(2,R)/U(1) coset CFTs. The evaluation of correlators boils down to that of a free-field theory with a certain number of insertion of screening operators. We prove that the winding number conservation is violated up to (+-)1 in three-point functions, which is in agreement with the result of FZZ that in generic N-point correlators the winding number conservation is violated up to N-2 units. A new integral formula of Dotsenko-Fateev type is derived, using which we write down the generic three-point functions of tachyons explicitly. When the winding number is conserved, the resultant expression is shown to reproduce the correlators in the coset model correctly, including the group-theoretical factor. As an application, we also study the superstring theory on linear dilaton background which is described by super-Liouville theory. We obtain the three-point amplitude of tachyons in which the winding number conservation is violated.Comment: 26 pages, 5 ps figures, v2:minor corrections(references to the work of FZZ are made more precise

Algorithms for finding attribute value group for binary segmentation of categorical databases

科研費報告書収録論文(課題番号:13680387・基盤研究(C)(2)・H13～H15/研究代表者:徳山, 豪/パラメトリック最適化を用いた幾何学データ処理の研究

Mining Optimized Association Rules for Numeric Attributes

AbstractGiven a huge database, we address the problem of finding association rules for numeric attributes, such as(Balance∈I)⇒(CardLoan=yes),which implies that bank customers whose balances fall in a rangeIare likely to use card loan with a probability greater thanp. The above rule is interesting only if the rangeIhas some special feature with respect to the interrelation betweenBalanceandCardLoan. It is required that the number of customers whose balances are contained inI(called thesupportofI) is sufficient and also that the probabilitypof the conditionCardLoan=yesbeing met (called theconfidence ratio) be much higher than the average probability of the condition over all the data. Our goal is to realize a system that finds such appropriate ranges automatically. We mainly focus on computing twooptimized ranges: one that maximizes the support on the condition that the confidence ratio is at least a given threshold value, and another that maximizes the confidence ratio on the condition that the support is at least a given threshold number. Using techniques from computational geometry, we present novel algorithms that compute the optimized ranges in linear time if the data are sorted. Since sorting data with respect to each numeric attribute is expensive in the case of huge databases that occupy much more space than the main memory, we instead apply randomized bucketing as the preprocessing method and thus obtain an efficient rule-finding system. Tests show that our implementation is fast not only in theory but also in practice. The efficiency of our algorithm enables us to compute optimized rules for all combinations of hundreds of numeric and Boolean attributes in a reasonable time

A fundamental approach for the measurement of solid-liquid interfacial energy

Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd

Electrospun Metal Oxide Nanofibers and Their Energy Applications

Metal oxide nanofibers have attracted considerable research interest for processing both one-dimensional nanometer scale morphology and unique chemical and electrical properties. A variety of their practical applications in light-emitting diodes, liquid crystal displays, solar cells, and gas sensors have been demonstrated. Electrospinning provides a rapid and facile way to fabricate nanofibers with diameter several orders of magnitude smaller than that produced by conventional spinning methods. In this chapter, we discuss the fabrication of ultrathin metal oxide nanofibers by the electrospinning technique. Priority is given to zinc oxide nanofibers. Major parameters affecting the morphology and diameter of the nanofibers are investigated systematically. The effect of calcination condition on chemical composition and crystallization of the electrospun nanofibers is also addressed. In addition, we show the advantages and problems when applying electrospun nanofibers to solar cells

ISOLATION AND CHARACTERIZATION OF A NOVEL HYALURONIDASE INHIBITOR FROM A MARINE ACTINOMYCETES STRAIN

A novel hyaluronidase inhibitor (HI) was isolated from the culture extract of a marine- derived actinomycete strain. This strain MB-PO13 was isolated from ascidian (Molgula manhattensis) in Tokyo Bay. Out of about 1,000 isolates from various marine organisms, strain MB-PO13 had the strongest inhibitory activity and was selected for further study. The strain showed abundant-to-moderate growth on most media, forming a grayish mycelium. On the basis of the taxonomical characteristics, the strain was classified as belonging to the genus of Streptomyces and was named as Streptomyces sp. strain MB-PO13. The structure of HI was elucidated by interpretation of NMR data. HI displayed about 25-fold potent hyaluronidase inhibitory activity against hyaluronidase than glycyrrhizin. Keywords: marine actinomycetes; Streptomyces; hyaluronidase inhibitor

Characterization of the Bacteriocinogenic Lactic Acid Bacteria Lactobacillus curvatus Strain Y108 Isolated from Nozawana-Zuke Pickles

We characterized the antibacterial activity of Lactobacillus curvatus strain Y108 isolated from the traditional Japanese pickle Nozawana-zuke, and partially identified the antibacterial agent produced by the strain. The Y108 strain exhibited antibacterial activity against L. curvatus JCM 1096, Listeria monocytogenes JCM7671, Staphylococcus aureus subsp. aureus JCM20624, and Serratia marcescens JCM20012. The antibacterial activity was abolished upon treatment with several proteases and lipase but not catalase, and it was moderately stable against heat treatment for 2 h at 100 degrees C. The Y108 strain showed higher antibacterial activity when grown at 20 degrees C than at 30 degrees C, which is its optimal growth temperature. SDS-PAGE analysis of the purified culture supernatant revealed the presence of two antibacterial peptide agents, F3-I and F3-II, with net molecular weights of 5.5 and 4.5 kDa, respectively. The IN-terminal amino acid sequences of F3-I and F3-II were homologous to those of lactocin 705 alpha and 705 beta, respectively. However, molecular masses and individual antibacterial activities of the two peptides were considerably different from those reported for lactocin 705.ArticleFOOD SCIENCE AND TECHNOLOGY RESEARCH. 16(3):253-262 (2010)journal articl

Molecular Interaction Between the Microenvironment and FLT3/ITD+ AML Cells Leading to the Refractory Phenotype

Internal tandem duplication mutations in the FLT3 gene (FLT3/ITD) are detected in 10–15% of children and 30% of adult patients with AML and are associated with an extremely poor prognosis. Although several antagonists against FLT3/ITD have been developed, few of them are effective for the treatment of FLT3/ITD+ AML because of the emergence of drug-resistant cells. The mechanisms responsible for drug resistance include the acquisition of additional mutations in the FLT3 gene and/or activation of other prosurvival pathways such as microenvironment-mediated resistance. Recent studies have strongly suggested that the reciprocal interaction between the microenvironment and AML cells generates specific machinery that leads to chemoresistance. This chapter describes the molecular mechanism responsible for the refractory phenotype of FLT3/ITD+ AML cells resulting from the communication between the microenvironment and FLT3/ITD+ leukemia cells. Understanding this mechanism enables the discovery of novel and innovative therapeutic interventions for resistant FLT3/ITD+ AML