Results 21 to 30 of about 306,713 (303)

PREPARTION OF SOME NEW COUMARIN DERIVATIVES WITH MEASURING BIOLOGICAL ACTIVITY [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2012
The present study was designed to be into stages. The first stage included preparing and dignosing four compounds of Schiff's-bases throught condensing be town 3-amino coumarin (1) with aldehyde aromatic. While, the second stage included the reaction the
MUHAMMED ABD KHADOM
doaj   +1 more source

Embedding Knowledge Graph through Triple Base Neural Network and Positive Samples [PDF]

open access: yesComputer and Knowledge Engineering, 2022
Representation learning on a knowledge graph aims to capture patterns in the knowledge graph as low-dimensional dense distributed representation vectors in the continuous semantic space, which is a powerful technique for predicting missing links in ...
Sogol Haghani, Mohammad Reza Keyvanpour
doaj   +1 more source

OPTIMIZATION OF TEACHER'S ACTIVITIES IN EDUCATION EMOTIONALLY POSITIVE ATTITUDE OF STUDENTS TO TEACHING BY MEANS OF METHODICAL WORK OF SCHOOL

open access: yesОсвітній вимір, 2007
The article theoretically bases the role of school's methodical work in up-growing of results of teacher's activity in up-bringing of schoolchildren of emotional and positive attitude to study; it bases the necessity of harmonization of intellectual and
N.Ye. Fedorinova
doaj   +1 more source

On Prototropy and Bond Length Alternation in Neutral and Ionized Pyrimidine Bases and Their Model Azines in Vacuo

open access: yesMolecules, 2023
In this review, the complete tautomeric equilibria are derived for disubstituted pyrimidine nucleic acid bases starting from phenol, aniline, and their model compounds—monosubstituted aromatic azines.
Ewa Daniela Raczyńska
doaj   +1 more source

ON TWO WAYS TO LOOK FOR MUTUALLY UNBIASED BASES

open access: yesActa Polytechnica, 2014
Two equivalent ways of looking for mutually unbiased bases are discussed in this note. The passage from the search for d+1 mutually unbiased bases in Cd to the search for d(d+1) vectors in Cd2 satisfying constraint relations is clarified.
Maurice R. Kibler
doaj   +1 more source

Indecomposability of entanglement witnesses constructed from symmetric measurements

open access: yesScientific Reports, 2022
We propose a family of positive maps constructed from a recently introduced class of symmetric measurements. These maps are used to define entanglement witnesses, which include other popular approaches with mutually unbiased bases and mutually unbiased ...
Katarzyna Siudzińska
doaj   +1 more source

Subregular representations of Sln and simple singularities of type An-1. Part II [PDF]

open access: yes, 2003
The aim of this paper is to show that the structures on K-theory used to formulate Lusztig's conjecture for subregular nilpotent sln-representations are, in fact, natural in the McKay correspondence.
Rumynin, D.   +5 more
core   +1 more source

Minimal orthonormal bases for pure quantum state estimation [PDF]

open access: yesQuantum
We present an analytical method to estimate pure quantum states using a minimum of three measurement bases in any finite-dimensional Hilbert space. This is optimal as two bases are insufficient to construct an informationally complete positive operator ...
Leonardo Zambrano   +2 more
doaj   +1 more source

Gabor systems on positive half line via Walsh-Fourier transform

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2020
Gabor systems play a vital role not only in modern harmonic analysis but also in several fields of applied mathematics, for instances, detection of chirps, or image processing.
O. Ahmad, N.A. Sheikh
doaj   +1 more source

Map-Based Microscope Positioning [PDF]

open access: yesProcedings of the British Machine Vision Conference 2004, 2004
In microscopy, regions of interest are usually much smaller than the whole slide area. Various microscopy related medical applications are liable to benefit greatly from microscope auto positioning in previously defined regions of interest. In this paper we present a method for image-based auto positioning on a microscope slide.
Grigory Begelman   +2 more
openaire   +1 more source

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