نتایج جستجو برای: jel q1
تعداد نتایج: 30958 فیلتر نتایج به سال:
Proof. One direction is easy, namely TQBF ∈ PSpace. Once again, to achieve a spaceefficient algorithm, we use recursion. If the leading quantifier is ∃x, then we recursively check the two cases of setting x to 0 and 1, and return true if one of them is true. Similarly, if the leading quantifier is ∀x, then we recursively check the two cases of setting x to 0 and 1, and return true if both of th...
Two Australian isolates of Treponema hyodysenteriae which did not fit within the current serological grouping system for these bacteria were examined by agarose gel double immunodiffusion tests (AGDP). Isolate Vic1 was serologically unique, and we propose that it becomes the type organism for a new sixth serological group of T. hyodysenteriae (Group F). Isolate Q1 was unusual in that lipopolysa...
An e cient algorithm is presented that generates a hermite interpolation quaternion curve. Given two unit quaternions q1; q2 2 SO(3), and two tangent vectors v1 and v2 at q1 and q2, respectively; two great circular arcs C1(t) and C2(t), 0 t 1, are constructed so that C1(0) = q1, C 0 1(0) = v1, C2(1) = q1, and C 0 2(1) = v2. The two great circular arcs C1 and C2 are then smoothly blended togethe...
BACKGROUND Innervation is a critical component of arrhythmogenesis and may present an important trigger/substrate modifier not used in current ventricular tachycardia (VT) ablation strategies. METHODS AND RESULTS Fifteen patients referred for ischemic VT ablation underwent preprocedural cardiac (123)I- meta-iodobenzylguanidine ((123)I-mIBG) imaging, which was used to create 3-dimensional (3D)...
This paper considers two methods for pricing assets and examines the relations between them. The +rst method is based on the principle of no-arbitrage, which asserts that introduction of the new asset should not create an arbitrage in a market that was before arbitrage free. This condition is satis+ed by prices for the new asset between speci+c lower and upper limits, determined as the values o...
We develop a model to study the implications of a legal environment on the organization of software production. We show that contract enforcement a®ects the organizational mode (i.e., in-house versus outsourcing) of customized software development while copyright protection determines the introduction of package software. When copyright protection is weak, only customized software will be devel...
Standard economic analysis holds that labor market rigidities are harmful for job creation and typically increase unemployment. But many orthodox reforms of the labor market have proved di±cult to implement because of political opposition. For these reasons it is important to explain why we observe such regulations. In this paper I outline a theory of how they may arise and why they ̄t together...
Context. Observations with the Hinode spectro-polarimeter have revealed strong horizontal internetwork magnetic fields in the quiet solar photosphere. Aims. We aim at interpreting the observations by means of results from numerical simulations. Methods. Radiative MHD simulations of dynamo action by near-surface convection are analyzed with respect to the relation between vertical and horizontal...
در این شرایط بمنظور افزایش بهرهوری عوامل تولید در زارعت گندم آبی، گسترش استفاده از ارقام اصلاحشده در اولویت برنامههای توسعهای دولت قرار گرفته است. استفاده از این فناوری در سطح مزارع میتواند تحت تأثیر عواملی نظیر سطح دادههای فنی و مدیریتی کشاورز، ویژگیهای مزرعه و بهره برداران، میزان خدمات ترویجی و سطح حمایتهای دولت قرار گیرد. هدف از انجام این پژوهش، بررسی اثرات فنی و حمایتی بر احتما...
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