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B. Xu, B. K. Li, S. Crozier, F. Liu, Q. Wei School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Queensland, Australia INTRODUCTION: High magnetic field (frequency) MRI technology has brought considerable engineering challenges in the form of ancillary hardware, including RF resonators. Studies in high frequency MRI have shown significant interact...
We give a new, combinatorial proof for the necklace splitting problem for two thieves using only Tucker's lemma (a combinatorial version of the Borsuk-Ulam theorem). We show how this method can be applied to obtain a related recent result of Simonyi and even generalize it. 1 Necklace Splitting This paper was inspired by the combinatorial proof of Matou2ek [7] of the Lovász-Kneser theorem [6]. H...
Lattice Definition. (Lattice) Given n linearly independent vectors b1, , bn ∈ R, the lattice generated by them · · · is defined as L(b1, b2, · · · bn) = { xibi|xi ∈ Z}. We refer to b1, · · · , bn as a basis of the lattice. Equivalently, if we define B as the m × n matrix whose columns are b1, , bn, then the lattice generated by B is · · · L(B) = L(b1, b2, · · · , bn) = {Bx|x ∈ Z}. We say that t...
RATIONALE Cardiac tissue cohesion relying on highly ordered cardiomyocytes (CM) interactions is critical because most cardiomyopathies are associated with tissue remodeling and architecture alterations. OBJECTIVE Eph/ephrin system constitutes a ubiquitous system coordinating cellular communications which recently emerged as a major regulator in adult organs. We examined if eph/ephrin could pa...
مایع آمنیوتیک (af) برای سلامت جنین حائز اهمیت است زیرا یک کیسه حمایت کننده گرداگرد جنین تشکیل میدهد که حاوی مواد مغذی و فاکتورهای رشد می باشد.اهمیت فاکتورهای رشد در رشد طبیعی جنین به اثبات رسیده است. در مایع آمنیوتیک انسان فاکتور رشد ترانس فرم کننده بتا-1 (tgf-?1) وجود دارد وتصور میشود که در هنگام تکوین معده و لوله های تنفسی عمل کند . tgf-beta یک سایتوکین چندکاره است که در تنظیم تمایز، تشکیل ما...
This paper describes a method for merging behavior specifications modeled by transition systems. Given two behavior specifications B1 and B2, Merge(B1, B2) defines a new behavior specification that extends B1 and B2. Moreover, provided that a necessary and sufficient condition holds, Merge(B1, B2) is a cyclic extension of B1 and B2. In other words, Merge(B1, B2) extends B1 and B2, and any cycli...
and Applied Analysis 3 −0.4 −0.3 −0.2 −0.1 0 0.1 0.2 0.3 0.4 −1.5 −1 −0.5 0 0.5 1 1.5 x1 x 2 Figure 1: Phase portrait of the chaotic YangHenon map system with a1 1.4, b1 0.3. where a1 1.4, b1 0.3 and positive argument n1 0, 1, 2, 3, . . . , n. The Yang chaotic behaviors of Henon map system are quoted 19 by phase portraits in Figure 1. The Henon map system is invertible if b1 / 0. The inversed H...
Purpose The problem of inhomogeneous B1 + fields in high field MRI has previously been addressed by novel or improved RF pulse designs (e.g. sparse spokes [1] and adiabatic pulses [2]) and hardware modifications (e.g. parallel transmit coils [3]). Existing techniques have practical limitations in that B1 + maps must be acquired for a specific imaging slice prior to the design of the RF pulse, S...
A series of signal-directed transitions regulates the development of distinct populations of self-tolerant B cells and ultimately the production of antibody-producing plasma cells. We studied the role of calcineurin/NFAT signaling in B cells by deleting the regulatory b1 subunit of calcineurin specifically in B cells. Follicular (FO) and marginal zone (MZ) B cells develop normally in these mice...
We confirmed multiple picoeukaryotic algae, Ostreococcus, Micromonas, and Pelagomonas spp., as thiamine (vitamin B1) auxotrophs in laboratory experiments with axenic cultures. Examined strains have half saturation growth constants (Ks) for B1 between 1.26 and 6.22 pmol B1 L , which is higher than reported seawater concentrations. Minimum B1 cell quotas for Ostreococcus and Micromonas spp. are h...
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