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Now showing items 31-40 of 87
The effects of ion bombardment of ultra-high molecular weight polyethylene
(
Elsevier
, 2006 , Article)
Ion bombardment is a suitable tool to improve tribological properties of polymers. In this study UHMWPE samples were bombarded with 130keV He ions to the fluences ranging from 1×1014 to 2×1016cm−2. RBS and NRA techniques ...
Ion beam modification of surface properties of polyethylene
(
Elsevier
, 2003 , Conference Paper)
Improvement of polymer tribological properties is an essential issue for their application when used as parts of machines or artificial human joints. Ion implantation is a very promising technique in this respect. This ...
Risk assessment of accidental spills of toxic and flammable liquids on land
(
Emerald Publishing
, 2004 , Master Thesis)
The main objective of this paper is the assessment of the environmental impact due to accidental spills of toxic and flammable liquids on land. Different case studies of possible accidents in the State of Qatar were ...
Large sample and bootstrap intervals for the gamma scale parameter based on grouped data
(
Wayne State University
, 2006 , Article)
Interval estimation of the scale parameter of the gamma distribution using grouped data is considered in this article. Exact intervals do not exist and approximate intervals are needed Recently, Chen and Mi (2001) proposed ...
On the Lp boundedness of rough parametric Marcinkiewicz functions
(
Victoria University
, 2007 , Article)
In this paper, we study the Lp boundedness of a class of parametric Marcinkiewicz integral operators with rough kernels in L(log + L)(Sn-1). Our result in this paper solves an open problem left by the authors of ([6]).
Characteristics of agent-based hierarchical diff-EDF schedulability over heterogeneous real-time Packet networks
(
EuroJournals Publishing, Inc.
, 2009 , Article)
Packet networks are currently enabling the integration of heterogeneous traffic with a wide range of characteristics that extend from video traffic with stringent QoS requirements to best-effort traffic requiring no ...
Validity and reliability of the Arabic version of Activities of Daily Living (ADL)
(
Nasser and Doumit
, 2009 , Article)
Background. The Activity of Daily Living (ADL) is an instrument that screens elderly respondents for physical functioning and assesses whether they are dependent or independent in their daily activities. This study ...
Childhood Labor in India: issues and complexities
(
Symposium Journals, Ltd
, 2008 , Article & Presentation)
It is estimated that more than 12 million children in India under the age of 14 engage in paid labor at least part time, due mostly to economic reasons. Dominant discourses about childhood however conceptualize childhood ...
Volatile Components of the Phaeophyceae Hormophysa cuneiformis Growing Along Qatar Coasts
(
Qatar University
, 2007 , Article)
The present work deals with the study on volatile compounds from the brown alga Hormophysa cuneiformis collected from the Northwest coast of Qatar on May 2002. Two extraction methods have been used: conventional hydrodistillation ...
A methodology for time-frequency image processing applied to the classification of nonstationary multichannel signals using instantaneous frequency descriptors with application to newborn EEG signals
(
Springer
, 2003 , Article)
This article presents a general methodology for processing non-stationary signals for the purpose of classification and localization. The methodology combines methods adapted from three complementary areas: time-frequency ...