30 SAJR March 2013 Vol. 17 No. 1 Primary bone tumours account for 5% of all adolescent and child cancers. The Ewing’s sarcoma family of tumours is an aggressive form of childhood cancer and comprises the second most common primary bone tumour that includes Ewing’s sarcoma, Askin’s tumour and peripheral primitive neuro-ectodermal tumour (PNET). When Ewing’s sarcoma arises in soft tissue (25%) ra...

C ongestive heart failure (CHF) is a common end-stage clinical presentation of coronary artery disease or 2 of its major risk factors, hypertension and diabetes mellitus. Because of this, patients with CHF are often prescribed 3-hydroxy-3-methylglutaryl coenzyme-A inhibitors (statins) that not only prevent cardiovascular events such as myocardial infarction, but also reduce the risk of incident...

background: in the past 20 years, a dramatic improvement in the prognosis of patients with hepatoblastoma (hb)has been achieved by combining surgery and chemotherapy in several national and international trials.materials and methods: four children ( 3 girl and 1 boy) aged 34 days, 4 months, 13 months, and 1 year with meanage of 6.53 (±5.15) months were presented to our center from 2002 to 2009 ...

in today’s restructured environment, congestion management plays an essential role in power system operation. different methods are presented and discussed in this respect for congestion management in short-term and long-term intervals. it is attempted in the present paper to investigate the impact mechanism of facts devices and demand response programs together with generation re-dispatch as s...

water quality is a worldwide problem which affects human beings lives fundamentally. water scarcity is intensified in result of quality deterioration. different factors such as population increase, economic development and water pollution could be considered as the origins of the problem. the study and forecasting of water quality is necessary to prevent serious water quality deteriorations in ...

this article is intended to be a survey on some combinatorial topics in group theory. the bibliography at the end is neither claimed to be exhaustive, nor is it necessarily connected with a reference in the text. i include it as i see it revolves around the concepts which are discussed in the text.

this paper presents the prediction of vehicle's velocity time series using neural networks. for this purpose, driving data is firstly collected in real world traffic conditions in the city of tehran using advance vehicle location devices installed on private cars. a multi-layer perceptron network is then designed for driving time series forecasting. in addition, the results of this study a...

let $(r,m)$ be a commutative noetherian local ring, $m$ a finitely generated $r$-module of dimension $d$, and let $i$ be an ideal of definition for $m$. in this paper, we extend cite[corollary 10(4)]{p} and also we show that if $m$ is a cohen-macaulay $r$-module and $d=2$, then $lambda(frac{widetilde{i^nm}}{jwidetilde{i^{n-1}m}})$ does not depend on $j$ for all $ngeq 1$, where $j$ is a minimal ...