Modeling and simulation of magnetorheological damper behavior under triangular excitation
Magnetorheological (MR) fluids are smart materials whose flow/viscosity properties can be modified by applying an electric field. These changes in viscosity occur within a fraction of a millisecond – far faster than conventional mechanical means – and can be used to effectively control vibrations in applications dealing with actuation, damping, robotics and mechatronics.
In this stu
Biomolecule and microwave assisted solvothermal syntheses of nanomaterials
Nanomaterials are increasingly gaining the attention of not only the scientific community, but also the public due to their unique properties which endear them to new and exciting applications. These special properties can vary markedly from those of the analogous bulk materials. The physical and chemical properties of the nanomaterials tend to be exceptionally closely dependent on their size and shape or mo
Requests agency to issue proposed regulation to assure quality of genetic tests
The Genetics and Public Policy Center this week called on Mark McClellan, Administrator of the Centers for Medicare and Medicaid Services (CMS), to end years of delay in assuring the safety and accuracy of genetic testing by issuing a proposed rule to create a genetic testing specialty under the Clinical Laboratory Improvement Amendments (CLIA) of 1988. The delay has meant that scientific and technolog
The bronchial tubes of a patient with severe asthma can become scarred due to repeated episodes of allergic inflammation in the airways. The scarring results in blocked airways, excessive production of mucus, and shortness of breath.
Researchers at the University of California, San Diego (UCSD) School of Medicine have discovered that when a single gene – IKK beta – is selectively inactivated in the membrane-lining cells of the bronchial tubes of mice that later inhale allergens, suc
May provide target for treatment, study shows
University of North Carolina at Chapel Hill scientists have identified a molecule that stimulates the aggressive growth of prostate cancer. The molecule, Ack1, a member of the growth-promoting tyrosine kinase gene family, stimulates tumor formation in part by signaling prostate cells to rid themselves of a tumor-suppressor protein. Normally, this suppressor protein would inhibit rapid cell growth by signaling the cell to destroy itse
New research says ’maybe’ – but it could mean tough choices
New research into the cost of using the breast cancer drug Herceptin warns that healthcare authorities and the organisations advising them should not rush to prescribe it for early breast cancer without working out extremely carefully the budget implications and cost-effectiveness of the drug.
In a Belgian study published (Wednesday 30 November) in Annals of Oncology[1], health economist Mattias Ney
Researchers are using a new cell transplantation technique to restore the cells that produce insulin in patients with type 1 diabetes. The method is minimally invasive, with few complications. The study was presented today at the annual meeting of the Radiological Society of North America (RSNA).
“We used ultrasound guidance to inject donor cells into the portal vein of diabetic patients, which is accessed through the skin,” said co-author Saravanan Krishnamoorthy, M.D., radiolo
A minimally invasive procedure can permanently cure people who suffer from “sweaty hands,” according to a study presented today at the annual meeting of the Radiological Society of North America (RSNA).
Computed tomography (CT) fluoroscopy allows precise needle guidance in the treatment of palmar hyperhidrosis, or sweaty hands, minimizing risk and discomfort to the patient.
“This CT-guided percutaneous technique is the most secure treatment today and stops sweating fr
Digital mammography images can be accurately transmitted over broadband Internet, according to a study presented today at the annual meeting of the Radiological Society of North America (RSNA).
“We’ve proven that telemammography works,” said the study’s lead author, Alan R. Melton, M.D., assistant clinical professor of radiology at New York Presbyterian Hospital-Columbia University Medical Center in New York City. “The ability to transmit mammograms over long dista
A large-scale, 12-year study has found that laser ablation with magnetic resonance (MR) guidance is as effective as traditional surgery in the treatment of liver tumors in some patients. The study was presented today at the annual meeting of the Radiological Society of North America (RSNA).
In the largest study of its type with the longest follow-up, 839 patients at the University of Frankfurt in Germany received MR-guided laser-induced thermotherapy (LITT) for the treatment of liver tumor
Preliminary results from the STAR-D project, one of the nation’s largest studies of depression, show that chronic depressive episodes are common and are associated with poorer physical health, lower quality of life, socioeconomic disadvantage and minority status.
Findings of this study highlight the common occurrence of chronic episodes of major depression and the range of factors that contribute to them in both psychiatric and primary care settings.
The analysis, whi
An invasive fish species, which poses major threats to UK fish, has been found in rivers and lakes across England and Wales according to new research published today in Fisheries Management and Ecology.
Past studies have shown that the Asian topmouth gudgeon can spread an infectious parasite that is closely related to ‘Rosette Agent’ – known to be deadly to salmon and trout. The link between topmouth gudgeon and the rosette-like agent, known to kill some carp species (sunbleak and
Harri Toivonen, M.Sc. (Econ), will defend his PhD dissertation at the Helsinki School of Economics (HSE) on Friday, December 2, 2005. The dissertation is entitled “Modeling, Valuation and Risk Management of Commodity Derivatives” and is in the field of Finance. The public defense will start at 12:00 in the auditorium of the Chydenia building (address Runeberginkatu 22-24). The opponent is Professor Petri Sahlström (Tampere University of Technology) and the custos is Professor Hannu Seristö (HS
Researchers have a relatively good understanding of “where” and “when” the brain edits incoming information; the question is “how” does this happen. It may be that researchers at the University of Bergen have found the answer.
Cognitive neuroscience research has revealed many different aspects of the brain’s functional capacity. It has not been possible to assemble the results of the different methods used to map the brain’s activity as yet, to give researchers a complete pict
Research published by University of Leicester researchers in the top journal “Circulation” identifies a gene that affects blood pressure levels in the general population. The results have come to light in the GRAPHIC study, funded by the British Heart Foundation. Over 450 families in Leicestershire took part in the study.
High blood pressure affects around three in ten adults in the UK and is one of the main causes of strokes and heart attacks. Risk factors for high blood pressure inc
Recent research suggests that most children spend more time ‘gaming’ than doing homework.
So what if gaming were homework or at least ‘out of class work’?
A European-funded project at Manchester Metropolitan University aims to show how games and mobile technologies can be combined to give new learning experiences for schoolchildren, particularly in their own time.
The eMapps.com Project aims to support the design of games which teachers are willing to adopt for
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