228 research outputs found
An improved wetted-wall bioaerosol sampling cyclone
No full textA modified wetted-wall cyclone using different methods of water injection techniques
upstream of the inlet was designed as an improvement to a wetted-wall cyclone developed
by White, which uses liquid injection through a port on the wall of the cyclone inlet. The
new cyclone has a high aerosol sampling flow rate (1250 L/min) and maintains constant
cut-point with the modified White-type cyclone along with greater collection efficiency,
lower time response, and reduced pressure drop.
The final air-blast atomizer cyclone (AAC2.1a) design considered has an aerosol-tohydrosol
collection efficiency cut-point of 1.3 mm with collection efficiencies at 1 and 2
mm of 39.9% and 86%, respectively. The efficiency reported for the modified White-type
cyclone for particle sizes of 1 and 2 mm was 40.5% and 76.3%, respectively, under no
water bypass conditions. The aerosol-to-aerosol transmission efficiency for the AAC2.1a
configuration was found to be approximately 53.7% for 1 mm diameter particles as
compared with 67.2% for the modified White-type cyclone.
Dry and wet time response tests were performed in which the modified White-type cyclone
had an initial response of 2.5 minutes for a wet start and 1 minute for a dry start for a
condition where there was no liquid carryover through the cyclone outlet. The rise time for
AAC2.1a cyclone under dry and wet start conditions was 0.5 minutes and 1.3 minutes,
respectively. The decay response of the modified White-type cyclone was 1.1 minutes for a wet start and 1.2 minutes for a dry start. The corresponding numbers for AAC2.1a cyclone
were 1.4 minutes for a dry start and 1 minute for a wet start condition.
Off design tests were run at approximately ������10% air flow rates to see the effect on cyclone
performance. It was seen that at a 10% higher flow rate (1350 L/min) the efficiency was
54.3%. At a 10% lower flow rate (1125 L/min) the efficiency was 33.7% as compared with
an efficiency of 39.9% at 1250 L/min for 1.0 mm PSL particles. It was found that at a water
input of 0.8 mL/min the efficiency reduced to 79.3% as compared to 86% at an input flow
rate of 1.6 mL/min for 2 mm size PSL
MSC879955 Supplemetal Material - Supplemental material for Randomized controlled trial: Flexible sigmoidoscopy as an adjunct to faecal occult blood testing in population screening
No full textSupplemental material, MSC879955 Supplemetal Material for Randomized controlled trial: Flexible sigmoidoscopy as an adjunct to faecal occult blood testing in population screening by Robert JC Steele, Francis A Carey, Greig Stanners, Jaroslaw Lang, Jess Brand, Linda A Brownlee, Emilia M Crichton, Jack W Winter, Perminder S Phull, Craig Mowat, Judith A Strachan, Ann-Marie Digan and Callum G Fraser in Journal of Medical Screening</p
How do we know what damage a safe intervention has in the long-term: Considering the risk of extra-corporeal shockwave lithotripsy and the onset of diabetes mellitus
No full textModell tudományos folyóiratok kiválasztására
No full textFOLYÓIRATOKDHAWAN, S. M.-PHULL. S. K.-JAIN, S. P.: Selection of scientific journals: a model = Journal of Documentation, 36. köt. 1. sz. 1980. p. 24-41
Modell tudományos folyóiratok kiválasztására
No full textFOLYÓIRATOKDHAWAN, S. M.-PHULL. S. K.-JAIN, S. P.: Selection of scientific journals: a model = Journal of Documentation, 36. köt. 1. sz. 1980. p. 24-41
Low Complexity Feature Point Detection and Tracking using CUDA
No full textHigh speed feature point detection and tracking is very demanding for many realtime computer vision applications. In existing work, the commonly used feature point detection algorithms like Harris and KLT (Kanade-Lucas-Tomasi) and feature tracking algorithm (Pyramidal-KLT) were redesigned to increase the performance by reducing the algorithmic complexity, resulting in the Low Complexity Corner detector (LOCOCO) and Robust Low Complexity Feature tracking (RLCT) algorithms. To attain further speedup, this report proposes the implementation of these low complexity detection and tracking algorithms on a massively parallel architecture of the modern graphics processing units (GPUs) using Compute Unified Device Architecture (CUDA). In the computing domain, due to semiconductor scaling limits and associated power and thermal challenges, combined with the difficulty of exploiting greater levels of instruction level parallelism, a paradigm shift is happening from a single core to many-core processors and massively multi-processing platforms. High performance is now available on single-chip commodity GPUs. Moreover, GPUs are no longer limited to graphics applications, but are emerging as usable general purpose computing devices. Advancement in such platforms, are making many computational intensive problems that were solvable only on supercomputing systems, to be computed on desktop systems, at a reduced price, and lower power requirements. The arrival of this new generation of low-cost high performance computing platforms presents both numerous opportunities and challenges. In this report, we present the use of such high performance many-core GPU platforms to obtain speedup by mapping general purpose computations to massively parallel architectures. It is observed, when properly executed, GPU adaptation of algorithms can result in significant savings in computation times. For an image size of 960x960 pixels, the low complexity corner detector and robust low complexity feature tracking algorithms are factor of 16 and 25 times faster on a GeForce 280 GTX GPU than the corresponding implementation on an Intel Core 2 Duo, 2.66 GHz, and 2GB RAM CPU.Computer EngineeringElectrical Engineering, Mathematics and Computer Scienc
Synthesis, characterization, applications, and challenges of iron oxide nanoparticles
No full textAttarad Ali,1 Hira Zafar,1 Muhammad Zia,1 Ihsan ul Haq,2 Abdul Rehman Phull,3 Joham Sarfraz Ali,1 Altaf Hussain4 1Department of Biotechnology, 2Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan; 3Department of Biology, Kongju National University, Kongju, South Korea; 4Department of Materials Science and Engineering, Institute of Space Technology, Islamabad, Pakistan Abstract: Recently, iron oxide nanoparticles (NPs) have attracted much consideration due to their unique properties, such as superparamagnetism, surface-to-volume ratio, greater surface area, and easy separation methodology. Various physical, chemical, and biological methods have been adopted to synthesize magnetic NPs with suitable surface chemistry. This review summarizes the methods for the preparation of iron oxide NPs, size and morphology control, and magnetic properties with recent bioengineering, commercial, and industrial applications. Iron oxides exhibit great potential in the fields of life sciences such as biomedicine, agriculture, and environment. Nontoxic conduct and biocompatible applications of magnetic NPs can be enriched further by special surface coating with organic or inorganic molecules, including surfactants, drugs, proteins, starches, enzymes, antibodies, nucleotides, nonionic detergents, and polyelectrolytes. Magnetic NPs can also be directed to an organ, tissue, or tumor using an external magnetic field for hyperthermic treatment of patients. Keeping in mind the current interest in iron NPs, this review is designed to report recent information from synthesis to characterization, and applications of iron NPs. Keywords: superparamagnetism, iron oxide nanoparticles, surfactants, hyperthermia, biodistribution, bioeliminatio
The Deprivation of Liberty Safeguards: observations and limitations
No full text The recently introduced Deprivation of Liberty Safeguards (DoLS), which came into force in April 2009, was created to protect the liberty of people lacking capacity admitted to care homes and hospitals in England and Wales. This paper discusses observations and some limitations of the DoLS for protecting the liberty of residents within institutional settings. The regulation, safeguards and recent relevant case law are examined critically. The author suggests that their effectiveness may be limited by the under-recognition of cases, ambiguity and limited safeguards within the statute. The paper concludes that the DoLS legislation has been a positive step towards protecting the liberty of those lacking capacity but that limitations present could undermine the purpose of the legislation. </jats:p
Trace element determination in environmental pollution: A kinetic method for mercury estimation
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