We study the information metric on instanton moduli spaces in two-dimensional nonlinear sigma models. In the CP1 model, the information metric on the moduli space of one instanton with the topological charge Q=k(k > or =1) is a three-dimensional hyperbolic metric, which corresponds to Euclidean anti-de Sitter space-time metric in three dimensions, and the overall scale factor of the information...

با توجه به رشد بالای جمعیت در جهان و نیاز اطمینان از امنیت غذایی، افزایش تولید واحد سطح محصولات زراعی به‌منزلة راهبردی اساسی حل مسئلة تأمین غذا به‌شمار می‌رود. سوی دیگر، وجود محدودیت زیرکشت پایین‌بودن میانگین عملکرد برخی کشاورزی مانند گندم کشور، محصول می‌تواند راهکاری عملی پاسخ کشور محسوب شود. یکی مهم‌ترین بیماری‌های فوزاریوم است که، نقش پیش‌بینی این بیماری جلوگیری کاهش بهره‌وری محصول، مدل‌هایی...

Objective: This in vitro study evaluated the effect of neolignan-containing solutions on dentin biomodificationpreviously applied to bonding procedure adhesive restorations. Material and Methods: Neolignans,dehydrodieugenol B–CP1 dehydrodieugenol B methyl ether–CP2, were isolated from Nectandra leucanthaand two aqueous containing 0.13% neolignans, 0.2% propylene glycol 3.0% ethanol prepared.Bov...

It is now well established that the cysteine proteinases of plants (e.g. papain, actinidin, bromelain) and animals (e.g. cathepsins B, H and L) are homologous (see Takio et al., 1983) and almost certainly evolved from a common ancestral protein. For all but one of the cysteine proteinases sequenced to date the N-terminal residues can be exactly aligned with one another at a distance of 25-29 re...

Let Fq be a finite field of q elements, and let Fq[x] be the polynomial ring over Fq. The Möbius function of a nonzero polynomial F ∈ Fq[x] is defined to be μ(F) = (−1)r if F = cP1 · · ·Pr with 0 = c ∈ Fq and P1, . . . , Pr are distinct monic irreducible polynomials, and μ(F) = 0 otherwise. Let Mn ⊂ Fq[x] be the set of monic polynomials of degree n over Fq, which is of size #Mn = qn. For r > 0,...

We derive an effective action for Dirac fermions coupled to O(3) non-linear σ-model (NLσM) through the Yukawa-type interaction. The nonperturbative (global) quantum anomaly of this model results in a Hopf term for the effective NLσM. We obtain this term using the “embedding” of the CP1 model into the CPM generalization of the model which makes the quantum anomaly perturbative. This perturbative...