نتایج جستجو برای: divided wall column

تعداد نتایج: 393215  

Journal: :Chinese Chemical Letters 2021

In this work, the phase-transitioned BSA (PTB) film using mild and fast fabrication process adhered to capillary inner wall uniformly, fabricated PTB film-coated column was applied realize open tubular electrochromatography (OT-CEC) enantioseparation. The enantioseparation ability of evaluated with eight pairs chiral analytes including drugs neurotransmitters, all achieving good resolution symm...

Journal: :Child neuropsychology : a journal on normal and abnormal development in childhood and adolescence 2015
Caitlin E V Mahy Babett Voigt Nicola Ballhausen Katharina Schnitzspahn Judi Ellis Matthias Kliegel

The present study investigated whether developmental changes in cognitive control may underlie improvements of time-based prospective memory. Five-, 7-, 9-, and 11-year-olds (N = 166) completed a driving simulation task (ongoing task) in which they had to refuel their vehicle at specific points in time (PM task). The availability of cognitive control resources was experimentally manipulated by ...

Journal: :Math. Comput. 2008
Michael S. Floater Tom Lyche

We derive a formula for an n-th order divided difference of the inverse of a function. The formula has a simple and surprising structure: it is a sum over partitions of a convex polygon with n+1 vertices. The formula provides a numerically stable method of computing divided differences of k-th roots. It also provides a new way of enumerating all partitions of a convex polygon of a certain type,...

Journal: :The American journal of psychology 2007
Kelly Anne Barnes Michael R Dougherty

This study examined the effect of divided attention (DA) on global judgment of learning (JOL) accuracy in a multitrial list learning paradigm. A word monitoring task was used to divide attention. Participants were assigned to an attention condition (DA at encoding, DA at judgment, DA at retrieval, or focused attention) and completed 4 learning trials, each comprising a study, judgment, and reca...

2008
Michiel Hazewinkel

Let NSymm be the Hopf algebra of noncommutative symmetric functions over the integers. In this paper a description is given of its Lie algebra of primitives over the integers, Prim(NSymm), in terms of recursion formulas. For each of the primitives of a basis of Prim(NSymm), indexed by Lyndon words, there is a recursively given divided power series over it. This gives another proof of the theore...

2012
VERA ČULJAK MIRKO S. JOVANOVIĆ

In this paper we obtain a formula which involves the n th derivative of the first order divided difference and a corresponding inequality for functions whose (n + 1)-th derivative belongs to a L p space. These results are a generalization of the results from [1] and [2]. Finally, some examples are given.

Journal: :نشریه دانشکده فنی 0
مهدی موسوی دانشگاه تهران علیرضا یاراحمدی بافقی دانشگاه تهران حمیدرضا بخشی دانشگاه تهران

in the past, rock slope stability analysis were performed either graphically or using a hand-held calculator, but nowadays there are variety of slope stability analysis which can be used according to the field condition and potential failure mode. in 2-d analysis, effect of convex and concave walls are neglected, however concave slopes are believed to be more stable than straight walls due to t...

Journal: :IEEJ Transactions on Fundamentals and Materials 1985

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