24,169 research outputs found

    Allelic Frequency of Kappa-Casein Locus (Asp148/Ala) in F1: Simmental (Bos Taurus) X Ongole Grade (Bos Indicus)

    Full text link
    This study was conducted to detect the genetic variants (single nucleotide polymorphism) of kappa-casein locus (Asp148/Ala) in F1: Simmental (Bos taurus) x Ongole grade (Bos indicus), SIMPO. Genomic DNA was isolated from blood sample of 40 SIMPO (21 males and 19 females). A 780 bp specific fragment of kappa-casein gene spanning from the forth exon region (517 bp) to forth intron (263 bp) was successfully amplified. The result of the PCR-RFLP (Polymerase Chain Reaction - Restriction Fragment Length Polymorphisms) analysis using HindIII enzyme showed that two genotypes (AA and AB) were found at this locus in SIMPO. The frequencies of A and B alleles in SIMPO were 0.79 and 0.21, respectively. The frequency lies between B. taurus (Simmental) and B. indicus group

    Lepton flavor violating μeγ\mu\to e\gamma and μe\mu-e conversion in unparticle physics

    Full text link
    We have studied lepton flavor violation processes μeγ\mu\to e\gamma and μe\mu-e conversion in nuclei induced by unparticle. Both Br(μeγ){\rm Br}(\mu\to e\gamma) and μe\mu-e conversion rate CR(μe,Nuclei){\rm CR}(\mu-e,{\rm Nuclei}) strongly depend on the scale dimension dUd_{\cal U} and the unparticle coupling λKff\lambda^{ff'}_{\rm K}(K=V, A, S, P). Present experimental upper bounds on Br(μeγ){\rm Br}(\mu\to e\gamma), CR(μe,Ti){\rm CR}(\mu-e,{\rm Ti}) and CR(μe,Au){\rm CR}(\mu-e,{\rm Au}) put stringent constraints on the parameters of unaprticle physics. The scale dimensions dUd_{\cal U} around 2 are favored for the unparticle scale ΛU\Lambda_{\cal U} of O(10TeV){\cal O}(10 {\rm TeV}) and the unparticle coupling of O(103){\cal O}(10^{-3}). CR(μe,Nuclei){\rm CR}(\mu-e,{\rm Nuclei}) is proportional to Zeff4A2/Z\rm{Z^4_{eff}A^2/Z} for the pure vector and scalar couplings between unparticle and SM fermions, this peculiar atomatic number dependence can be used to distinguish unparticle from other theoretical models.Comment: 16 pages, 5 figure

    Higgs Triplets, Decoupling, and Precision Measurements

    Full text link
    Electroweak precision data has been extensively used to constrain models containing physics beyond that of the Standard Model. When the model contains Higgs scalars in representations other than SU(2) singlets or doublets, and hence rho not equal to one at tree level, a correct renormalization scheme requires more inputs than the three needed for the Standard Model. We discuss the connection between the renormalization of models with Higgs triplets and the decoupling properties of the models as the mass scale for the scalar triplet field becomes much larger than the electroweak scale. The requirements of perturbativity of the couplings and agreement with electroweak data place strong restrictions on models with Higgs triplets. Our results have important implications for Little Higgs type models and other models with rho not equal to one at tree level.Comment: 23 page

    Symplectic Reduction and Symmetry Algebra in Boundary Chern-Simons theory

    Full text link
    We derive the Kac-Moody algebra and Virasoro algebra in Chern-Simons theory with boundary by using the symplectic reduction method and the Noether procedures.Comment: References are adde

    Evaluation of microstructure and mechanical property variations in AlxCoCrFeNi high entropy alloys produced by a high-throughput laser deposition method

    Full text link
    Twenty-one distinct AlxCoCrFeNi alloys were rapidly prepared by laser alloying an equiatomic CoCrFeNi substrate with Al powder to create an alloy library ranging x=0.15-1.32. Variations in crystal structure, microstructure and mechanical properties were investigated using X-ray diffraction, scanning electron microscopy, scanning transmission electron microscopy and nanoindentation. With increasing Al content, the crystal structure transitioned from a disordered FCC to a mixture of disordered BCC and ordered B2 structures. While the onset of BCC/B2 formation was consistent with previously reported cast alloys, the FCC structure was observed at larger Al contents in the laser processed materials, resulting in a wider two phase regime. The FCC phase was primarily confined to the BCC/B2 grain boundaries at these high Al contents. The nanoindentation modulus and hardness of the FCC phase increased with Al content, while the properties of the BCC/B2 structure were insensitive to composition. The structure and mechanical properties of the laser-processed alloys were surprisingly consistent with reported results for cast alloys, demonstrating the feasibility of applying this high-throughput methodology to multicomponent alloy design.Comment: 20 pages, 8 figures and 1 tabl

    Mirror symmetry on K3 surfaces via Fourier-Mukai transform

    Full text link
    We use a relative Fourier-Mukai transform on elliptic K3 surfaces XX to describe mirror symmetry. The action of this Fourier-Mukai transform on the cohomology ring of XX reproduces relative T-duality and provides an infinitesimal isometry of the moduli space of algebraic structures on XX which, in view of the triviality of the quantum cohomology of K3 surfaces, can be interpreted as mirror symmetry.Comment: 15 pages, AMS-LaTeX v1.2. Final version to appear in Commun. Math. Phy

    Comments on `` Black Hole Entropy from Conformal Field Theory in Any Dimension ''

    Full text link
    In a recent letter, Carlip proposed a generalization of the Brown-Henneaux-Strominger construction to any dimension. We present two criticisms about his formulation.Comment: 4 pages, Enriched version for the accepted one (Phys. Rev. Lett.

    Can the standard international business cycle model explain the relation between trade and comovement?

    Get PDF
    Recent empirical research finds that pairs of countries with stronger trade linkages tend to have more highly correlated business cycles. We assess whether the standard international business cycle framework can replicate this intuitive result. We employ a three-country model with transportation costs. We simulate the effects of increased goods market integration under two asset market structures: complete markets and international financial autarky. Our main finding is that under both asset market structures the model can generate stronger correlations for pairs of countries that trade more, but the increased correlation falls far short of the empirical findings. Even when we control for the fact that most country pairs are small with respect to the rest of the world, the model continues to fall short. We also conduct additional simulations that allow for increased trade with the third country or increased TFP shock comovement to affect the country pair’s business cycle comovement. These simulations are helpful in highlighting channels that could narrow the gap between the empirical findings and the predictions of the model.Business cycles ; International trade

    Standarisasi Vs Globalisasi suatu Prespektif Baru dalam Strategi Merek

    Full text link
    Pemasaran produk yang memiliki mutu tinggi dapat dikenal oleh konsumen melalui merek yang digunakan Perusahaan penghasil produk tersebut. Agar mutu produk yang dihasilkan selalu konsisten setiap saat diperlukan standarisasi mutu baik di tingkat Perusahaan, nasional regional maupun internasional. Di era globalisasi ini Perusahaan dituntut untuk mengembangkan pemasaran produknya tidak hanya didalam negeri, tetapi juga pada skala internasional. Untuk keperluan ini Perusahaan dituntut untuk memperhatikan dan mempelajari keinginan konsumen di negara dimana produknya akan dipasarkan dengan tetap membuat mutu produk yang terstandarisasi. Agar produk yang dipasarkan di tingkat internasional dapat diterima , maka Perusahaan dapat menjual melalui merek yang dapat dipahami oleh konsumen setempat. Dengan demikian dapat disimpulkan, untuk perdagangan global, mutu produk harus tetap sesuai dengan standar yang telah disepakati, namun merek produk dapat disesuaikan agar dapat diterima oleh konsumen dimana produk tersebut dipasarkan yang dikenal dengan merek global
    corecore