We contribute to the refined understanding of language-logic-algebra interplay in context first-order properties countable words. establish decidable algebraic characterizations one variable fragment FO as well boolean closure existential via a strengthening Simon’s theorem about piecewise testable languages. propose new extension which admits infinitary quantifiers reason inherent provide very...

BACKGROUND The analgesic effect of a TAP block has been investigated in various surgical settings. There are however limited information about block level and block duration. Furthermore, there is a lack of information about continuous TAP block after ultrasound-guided posterior TAP blocks.The aim of this double-blind randomized study was therefore to investigate the effect of an ultrasound-gui...

injecting local anesthetic at the seeking current would be appealing.it would save time and avoid potentially dangerous manipulations of the needle. this study aimed to test the hypotheses that in vertical infraclavicular block, injecting local anesthetic at a seeking current of 0.8 ma would produce the same quality of block as injecting at ≤0.5ma. a total of sixty asa i -iii adult patients sch...

This paper presents a block Schur algorithm to obtain a factorization of a symmetric block Toeplitz matrix. It is inspired by the various block Schur algorithms that have appeared in the literature but which have not considered the innuence of performance tradeoos on implementation choices. We develop a version based on block hyperbolic Householder reeectors by adapting the representation schem...

Multimedia applications require a compression and decompression scheme for digital video. The standardized and widely used techniques JPEG and MPEG provide very good compression ratios, but are computationally quite complex and demanding. We propose to use an extension to the much simpler Color Cell Compression scheme as an alternative. Our extension includes the use of variable block sizes, th...

This is in part a position paper and in part a description of a Google Chrome privacy extension we built. We make the case that our first goal when tackling the issue of privacy and third party tracking of user’s browsing should be to increase transparency. We describe a browser extension we have built, that enables users to see which third party has observed what about them. We discuss the res...

For matroids M and N on disjoint sets S and T , a semidirect sum of M and N is any matroid K on S ∪ T that, like the direct sum and the free product, has the restrictionK|S equal toM and the contractionK/S equal toN . We abstract a matrix construction to get a general matroid construction: the matroid union of any rank-preserving extension ofM on the set S ∪ T with the direct sum ofN and the ra...

In this paper, we provide new preconditioner for saddle point linear systems with (1,1) blocks that have a high nullity. The preconditioner is block triangular diagonal with two variable relaxation paremeters and it is extension of results in [1] and [2]. Theoretical analysis shows that all eigenvalues of preconditioned matrix is strongly clustered. Finally, numerical tests confirm our analysis.

Photo responsive polyethyl vinyl ketone (PEVK) and various block copolymers were prepared through the visible light induced cobalt mediated radical polymerization (CMRP) process. The first order kinetics and linear increase in molecular weight with conversion demonstrated a well-behaved system. Chain extension experiments showed the retention of the living end of PEVK.

The optimal treatment for endometrial carcinoma is radical hysterectomy and hemivaginectomy with pre-operative caesium sources in the uterus and vaginal vault. Block pelvic lymphadenectomy is unsatisfactory, and gland extension is best treated by radiotherapy to the lateral pelvic and para-aortic fields. Surgery has a definite place in the treatment of advanced cases.