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Search Results: 1 - 10 of 3994 matches for " Sandy Patel "
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Magnetic Resonance Perfusion Imaging in the Diagnosis of High-Grade Glioma Progression and Treatment-Related Changes: A Systematic Review  [PDF]
John Dongas, Adon Toru Asahina, Stephen Bacchi, Sandy Patel
Open Journal of Modern Neurosurgery (OJMN) , 2018, DOI: 10.4236/ojmn.2018.83024
Abstract: In patients with high grade gliomas (HGGs), progression after treatment can be difficult to diagnose due to treatment-related effects, which overlap in appearance with tumour progression on conventional magnetic resonance imaging (MRI) sequences. Specialised imaging methods have been studied for this purpose, though most institutions currently use histopathology or clinicoradiological follow-up for diagnosis. This publication aims to review the evidence for perfusion MRI techniques. The databases of Pubmed, MEDLINE, EMBASE and Scopus were searched using combinations of the subject headings high grade glioma and MRI perfusion. 41 articles fulfilled the inclusion criteria. Dynamic Susceptibility Contrast (DSC) MRI was the most extensively studied, with several studies achieving high sensitivities and specificities. Other techniques exhibiting potential include Dynamic Contrast Enhanced (DCE) MRI, Arterial Spin Labelling (ASL). However, these techniques are not widely used or available for clinical practice. Composite measures combining results from multiple techniques tended to achieve higher accuracies. Some publications compared processing software used or looked at machine learning with relative success. An issue common to the literature is the lack of standardisation in the reference standard and acquisition/processing methods. Furthermore, many had small sample sizes, and further consideration needs to be given with regards to timing of imaging, and treatment regimens received in such studies.
Symmetric Identities from an Invariant in Partition Conjugation and Their Applications in q-Series  [PDF]
Sandy H. L. Chen
Open Journal of Discrete Mathematics (OJDM) , 2014, DOI: 10.4236/ojdm.2014.42006
Abstract:

For every partition \"\" and its conjugation \"\", there is an important invariant \"\" \"\", which denotes the number of different parts. That is \"\", . We will derive a series of symmetric q-identities from the invariant in partition conjugation by studying modified Durfee rectangles. The extensive applications of the several symmetric q-identities in q-series  [1] will also be discussed. Without too much effort one can obtain much well-known knowledge as well as new formulas by proper substitutions and elementary calculations, such as symmetric identities, mock theta functions, a two-variable reciprocity theorem, identities from Ramanujan’s Lost Notebook and so on.

Measurement of Gamma-Rays Using Smartphones  [PDF]
Sandy Tith, Nares Chankow
Open Journal of Applied Sciences (OJAppS) , 2016, DOI: 10.4236/ojapps.2016.61004
Abstract: The CMOS (Complementary Metal Oxide Semiconductor) image sensor of a smartphone has been known for its sensitivity to gamma-rays. In this research, some smartphones were selected and tested for measurement of gamma-rays emitted from Cesium-137 and Iridium-192 sources. During measurements, the phones were set in video mode while the camera lenses were covered with black adhesive tape to prevent light exposure. Interaction of gamma-rays with the CMOS appeared as flashing bright spots on the image. The bright spots were then counted by using the freely available ImageJ software. Preliminary results indicated that the number of bright spots increased linearly with increase of gamma-ray dose rate. An in-house Android application software was then developed for real-time counting of the bright spots. The application software also allowed users to input a calibration equation so that the phones could simultaneously convert the count rate to display in dose rate. This research demonstrated that, after appropriate calibration, smartphones could be used as gamma-ray measuring devices for radiation safety control involving high activity sources such as in industrial radiography, gamma-ray irradiation facility and medical treatment.
In Search of Inclusive Growth: The Role of Economic Institutions and Policy  [PDF]
Francis Y. Kumah, Mathew Sandy
Modern Economy (ME) , 2013, DOI: 10.4236/me.2013.411081
Abstract:


Inclusive economic growth is one of key challenges facing countries across the globe, notwithstanding initial conditions, particularly following the 2008 global economic slowdown. This paper searches for links between the quality of institutions, economic policies, economic growth and employment creation in low-income countries, using the specific case of Sierra Leone to illustrate. While its findings are consistent with the literature, the paper suggests that re-focusing economic policies on per capita real GDP growth may yield employment dividends, but well-targeted interventions would be needed to cater for the unemployed and to support vulnerable groups which may be adversely impacted by the very policies that drive growth.


A Quantitative Analysis of Collision Resolution Protocol for Wireless Sensor Network  [PDF]
Reema Patel, Dhiren Patel
Journal of Software Engineering and Applications (JSEA) , 2015, DOI: 10.4236/jsea.2015.88036
Abstract: In this paper, we present formal analysis of 2CS-WSN collision resolution protocol for wireless sensor networks using probabilistic model checking. The 2CS-WSN protocol is designed to be used during the contention phase of IEEE 802.15.4. In previous work on 2CS-WSN analysis, authors formalized protocol description at abstract level by defining counters to represent number of nodes in specific local state. On abstract model, the properties specifying individual node behavior cannot be analyzed. We formalize collision resolution protocol as a Markov Decision Process to express each node behavior and perform quantitative analysis using probabilistic model checker PRISM. The identical nodes induce symmetry in the reachable state space which leads to redundant search over equivalent areas of the state space during model checking. We use “ExplicitPRISMSymm” on-the-fly symmetry reduction approach to prevent the state space explosion and thus accommodate large number of nodes for analysis.
New Frames for Old Masters. An overview of the British Library's Acetate Transfer programme
Sandy Ryan
Liber Quarterly : The Journal of European Research Libraries , 2005,
Abstract: After the second International Round Table on acetate microfilm, the British Library decided to top slice from its annual preservation budget, £200k every year for five years to address its cellulose acetate problem. We did this by instigating a programme of base transfer, transferring the frames from the old acetate masters onto new polyester stock. It proved to be quite a challenge and this paper reproduces largely the presentation given at CAMF, which was an overview of the background to the project and its progress. Twenty three million feet. Not a centipedes' picnic, but the amount of acetate microfilm the British Library has in its collections. A sobering statistic. But what does it really mean? Well, if we rolled it all out, it would be enough to stretch all the way from New York to Moscow. Or, for the more vertically minded, if we piled it all up, it would be taller than not just 1 Mount Everest, but 809. That represents a pretty huge problem whichever way you look at it and my first thought when it was handed to me was, 'where on earth do we start?'
Readiness to adopt e-learning: pioneering a course in school librarianship education
Sandy Zinn
South African Journal of Libraries and Information Science , 2009, DOI: 10.7553/75-2-96
Abstract: E-learning has come of age in South African higher education but scepticism, caution and an inadequate reward system for innovative teaching methods have resulted in a slow uptake by academics. Within this milieu the author pioneered a course in the ACE School Librarianship programme. The study describes the e-learning experiences of the course participants gleaned from questionnaire responses to questions related to experiences of ICTs, the Internet and online learning, ability to navigate the e-learning environment, utilization of elements of the learning management system and implementation of course ideas in their respective schools and personal lives. The study also provides an opportunity for the author to reflect on her pioneering experiences with e-learning and how she would approach it differently next time. The main lessons learned were that 1) the e-learning environment is not necessarily intuitive and participants need opportunities to digest novel features such as the discussion forum; 2) several of the advantages and disadvantages of e-learning that appear in the research literature are identified in this study; and 3) setting up an e-learning course is best achieved incrementally.
EDITORIAL: MEDIA AND “RACE”
Sandy Watson
PLATFORM : Journal of Media and Communication , 2011,
Abstract:
POST-RACIALITY OR A RE-IMAGINING OF WHITENESS: AN INTERVIEW WITH CLARENCE E. WALKER
Sandy Watson
PLATFORM : Journal of Media and Communication , 2011,
Abstract: Walker’s most recent work, with Gregory Smithers, explores the emergence of discourses of post-raciality during the 2008 United States election campaign (Walker and Smithers 2009) where Walker argued that the historical superficiality of journalism exacerbates racial tensions rather than creating greater cultural understanding on racial issues (2009, p. 39). In this interview, he discusses the applicability of what he describes as reactionary discourses (that of post-raciality, colour blindness and colour neutrality) in the context of shifting media usage and tensions arising from perceived challenges to the dominant, white-centred national imaginary.
MEDIATING DIASPORA, IDENTITY AND ETHNICITY: AN INTERVIEW WITH MYRIA GEORGIOU
Sandy Watson
PLATFORM : Journal of Media and Communication , 2011,
Abstract: Myria Georgiou is noted for her influential and longstanding theorisation on diaspora, media and identity, including the first mapping of diasporic media in the European Union, together with Roger Silverstone. She has also authored a significant number of books covering areas such as transnationalism and diasporic media (2007a; 2007b; 2006), national identity and ethnicity (2008b; 2006), media and urban life (2008a); and mediations of ethnicity and race (2010; 2009).
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