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السجلات المعروضة 31 -- 40 من 94
Synthesis, spectroscopic and thermal studies of the reactions of the donors piperazine and N,N′-dimethylpiperazine with σ- and π-acceptors
(
Elsevier
, 2008 , Article)
Abstract The interactions of the electron donors piperazine (PIP) and N,N′-dimethylpiperazine (DMPIP) with the σ-acceptor iodine and the π-acceptors tetracyanoethylene (TCNE) and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone ...
مفهوم السياسات السكانية ومدى حاجة دول مجلس التعاون الخليجي إليها
(
اللجنة الدائمة للسكان
, 2008 , Article)
إن هذا البحث يؤكد أن هناك حاجة ملحة إلى رسم سياسات سكانية ، إذا ما أردنا أن نخطط للمستقبل بشكل إيجابي في كافة الجوانب ذات الصلة بالإنسان والمجتمع الخليجي وذلك قبل أن تتأزم الأمور وتتشابك إشكاليات المسألة السكانية آخذين ...
On reality and asymptotics of zeros of q-Hankel transforms
(
Elsevier Inc.
, 2008 , Article)
We give sufficient conditions which guarantee that the finite q-Hankel transforms have only real zeros which satisfy some asymptotic relations. The study is carried out using two different techniques. The first is by a use ...
Simpler is also better in approximating fixed points
(
Elsevier
, 2008 , Article)
In this paper we demonstrate that a number of fixed point iteration problems can be solved using a modified Krasnoselskij iteration process, which is much simpler to use than the other iteration schemes that have been defined
A novel algorithm for molecular synthesis using enhanced property operators
(
Elsevier Ltd
, 2008 , Article)
Traditionally process design and molecular design have been treated as two separate problems, with little or no feedback between the two approaches. Introduction of the property integration framework has allowed for ...
Incidence, severity and preventability of medication-related visits to the emergency department: A prospective study
(
Canadian Medical Association
, 2008 , Article)
Background: Medication-related visits to the emergency department are an important but poorly understood phenomenon. We sought to evaluate the frequency, severity and preventability of drug-related visits to the emergency ...
Empirical likelihood intervals for the population mean and quantiles based on balanced ranked set samples
(
Springer-Verlag
, 2008 , Article)
We consider nonparametric interval estimation for the population mean and quantiles based on a ranked set sample. The asymptotic distributions of the empirical log likelihood ratio statistic for the mean and quantiles are ...
An open-loop technique for angle determination from position encoders
(
IEEE
, 2008 , Conference Paper)
The paper presents a novel technique for the determination of the angle from low-frequency quadrature cosinusoidal signals produced, for example, by position sensors. In the presented scheme applied to a resolver, the ...
Modeling of the exhaust box assembly workshop using neural networks
(
IEEE
, 2008 , Conference Paper)
The paper investigates the use of artificial neural networks in modeling and control of manufacturing systems. This approach models the various elements of a manufacturing system by the form of neural networks. The modeling ...
Do general indexes mask sectoral efficiencies?: A multiple variance ratio assessment of Middle Eastern equity markets
(
Emerald Group Publishing Limited
, 2008 , Article)
Purpose - The purpose of the paper is to attempt to shed light on whether the use of general indexes may mask sectoral efficiencies by investigating the random walk (RW) and weak-form efficiency (WFE) hypotheses in the ...