Cascade flutter analysis with transient response aerodynamics

Two methods for calculating linear frequency domain aerodynamic coefficients from a time marching Full Potential cascade solver are developed and verified. In the first method, the Influence Coefficient, solutions to elemental problems are superposed to obtain the solutions for a cascade in which all blades are vibrating with a constant interblade phase angle. The elemental problem consists of a single blade in the cascade oscillating while the other blades remain stationary. In the second method, the Pulse Response, the response to the transient motion of a blade is used to calculate influence coefficients. This is done by calculating the Fourier Transforms of the blade motion and the response. Both methods are validated by comparison with the Harmonic Oscillation method and give accurate results. The aerodynamic coefficients obtained from these methods are used for frequency domain flutter calculations involving a typical section blade structural model. An eigenvalue problem is solved for each interblade phase angle mode and the eigenvalues are used to determine aeroelastic stability. Flutter calculations are performed for two examples over a range of subsonic Mach numbers

Evaluating free flux flow in low-pinning molybdenum-germanium superconducting films

Vortex dynamics in molybdenum-germanium superconducting films were found to well approximate the unpinned free limit even at low driving forces. This provided an opportunity to empirically establish the intrinsic character of free flux flow and to test in detail the validity of theories for this regime beyond the Bardeen-Stephen approximation. Our observations are in good agreement with the mean-field result of time dependent Ginzburg-Landau theory. PACS: 74.25.Sv,74.25.Wx,74.25.Uv,74.25.Op,74.25.F- Keywords: vortices, fluxon, Larkin, Ovchinnikov, upper critical magnetic fieldComment: This is the final revised version of a paper that is currently in press. It is expected to appear in Phys. Rev. B in 201

Cost variation analysis of commonly prescribed anti-diabetic drugs available in Indian market: a pharmaco-economic study

Background: Diabetes mellitus (DM) is a chronic metabolic disorder requiring lifelong treatment. Due to rapid expansion of urbanization, unhealthy diet habits and sedentary lifestyle, the incidence of DM is increasing. The chronic nature of DM causes significant personal suffering and economic difficulty to families. The was aimed at investigating the cost difference in various brands of the same oral anti-diabetic drug.Methods: The minimum and the maximum cost in rupees (INR) of a particular anti-diabetic drug manufactured by various pharmaceutical companies were obtained from current index of medical specialties (CIMS) website, Indian drug review (IDR) 2021 issue and National pharmaceutical pricing authority-pharma sahi daam. The cost ratio and percentage cost variation were noted for each brand.Results: Amongst single drug therapy, metformin 500 mg sustained release showed highest price variation (3668%). Minimum cost variation was found with glipizide 2.5 mg (65%). Amongst the fixed dose combinations, highest cost variation was seen with glimepiride 2 mg+metformin 1000 mg (2703%) while minimum cost variation was found with repaglinide 1 mg+voglibose 0.3 mg (29%).Conclusions: A noticeable cost variation was found in different brands of the same anti-diabetic drug. Prescribing a more expensive brand when a cheaper one is available can burden the patient financially and thus reduce patient compliance. In addition, the Government should also include more anti-diabetic drugs under the price control policy to ensure that affordable and efficacious medicines are available to all.Background:  Diabetes mellitus (DM) is a chronic metabolic disorder requiring lifelong treatment. Due to rapid expansion of urbanization, unhealthy diet habits and sedentary life style, the incidence of DM is increasing .The chronic nature of DM causes significant personal suffering and economic difficulty to families. The present study aims at investigating the cost difference in various brands of the same oral anti-diabetic drug.Methods: The minimum and the maximum cost in rupees (INR) of a particular anti-diabetic drug manufactured by various brands were obtained from Current Index of Medical Specialties (CIMS) website, Indian Drug Review (IDR) 2021 issue and National Pharmaceutical Pricing Authority – Pharma sahi daam. The cost ratio and percentage cost variation were noted for each brand.Results: Amongst single drug therapy, Metformin 500mg Sustained Release showed highest price variation (3668%). Minimum cost variation was found with Glipizide 2.5mg (65%).Amongst the fixed dose combinations, highest cost variation was seen with Glimepiride 2mg + Metformin 1000mg (2703%) while minimum cost variation was found with Repaglinide 1mg + Voglibose 0.3mg (29%). Conclusions: A noticeable cost variation was found in different brands of the same anti-diabetic drug. Prescribing a more expensive brand when a cheaper one is available can burden the patient financially and thus reduce patient compliance. In addition, the Government should also include more anti-diabetic drugs under the price control policy to ensure that affordable and efficacious medicines are available to all. Keywords: Anti-diabetic agents, Cost variation, Pharmaco-economics, Adherence, Brands   Background:  Diabetes mellitus (DM) is a chronic metabolic disorder requiring lifelong treatment. Due to rapid expansion of urbanization, unhealthy diet habits and sedentary life style, the incidence of DM is increasing .The chronic nature of DM causes significant personal suffering and economic difficulty to families. The present study aims at investigating the cost difference in various brands of the same oral anti-diabetic drug.Methods: The minimum and the maximum cost in rupees (INR) of a particular anti-diabetic drug manufactured by various brands were obtained from Current Index of Medical Specialties (CIMS) website, Indian Drug Review (IDR) 2021 issue and National Pharmaceutical Pricing Authority – Pharma sahi daam. The cost ratio and percentage cost variation were noted for each brand.Results: Amongst single drug therapy, Metformin 500mg Sustained Release showed highest price variation (3668%). Minimum cost variation was found with Glipizide 2.5mg (65%).Amongst the fixed dose combinations, highest cost variation was seen with Glimepiride 2mg + Metformin 1000mg (2703%) while minimum cost variation was found with Repaglinide 1mg + Voglibose 0.3mg (29%). Conclusions: A noticeable cost variation was found in different brands of the same anti-diabetic drug. Prescribing a more expensive brand when a cheaper one is available can burden the patient financially and thus reduce patient compliance. In addition, the Government should also include more anti-diabetic drugs under the price control policy to ensure that affordable and efficacious medicines are available to all. Keywords: Anti-diabetic agents, Cost variation, Pharmaco-economics, Adherence, Brands   Background:  Diabetes mellitus (DM) is a chronic metabolic disorder requiring lifelong treatment. Due to rapid expansion of urbanization, unhealthy diet habits and sedentary life style, the incidence of DM is increasing .The chronic nature of DM causes significant personal suffering and economic difficulty to families. The present study aims at investigating the cost difference in various brands of the same oral anti-diabetic drug.Methods: The minimum and the maximum cost in rupees (INR) of a particular anti-diabetic drug manufactured by various brands were obtained from Current Index of Medical Specialties (CIMS) website, Indian Drug Review (IDR) 2021 issue and National Pharmaceutical Pricing Authority – Pharma sahi daam. The cost ratio and percentage cost variation were noted for each brand.Results: Amongst single drug therapy, Metformin 500mg Sustained Release showed highest price variation (3668%). Minimum cost variation was found with Glipizide 2.5mg (65%).Amongst the fixed dose combinations, highest cost variation was seen with Glimepiride 2mg + Metformin 1000mg (2703%) while minimum cost variation was found with Repaglinide 1mg + Voglibose 0.3mg (29%). Conclusions: A noticeable cost variation was found in different brands of the same anti-diabetic drug. Prescribing a more expensive brand when a cheaper one is available can burden the patient financially and thus reduce patient compliance. In addition, the Government should also include more anti-diabetic drugs under the price control policy to ensure that affordable and efficacious medicines are available to all. Keywords: Anti-diabetic agents, Cost variation, Pharmaco-economics, Adherence, Brands        

Nilotinib, an approved leukemia drug, inhibits smoothened signaling in Hedgehog-dependent medulloblastoma.

Dysregulation of the seven-transmembrane (7TM) receptor Smoothened (SMO) and other components of the Hedgehog (Hh) signaling pathway contributes to the development of cancers including basal cell carcinoma (BCC) and medulloblastoma (MB). However, SMO-specific antagonists produced mixed results in clinical trials, marked by limited efficacy and high rate of acquired resistance in tumors. Here we discovered that Nilotinib, an approved inhibitor of several kinases, possesses an anti-Hh activity, at clinically achievable concentrations, due to direct binding to SMO and inhibition of SMO signaling. Nilotinib was more efficacious than the SMO-specific antagonist Vismodegib in inhibiting growth of two Hh-dependent MB cell lines. It also reduced tumor growth in subcutaneous MB mouse xenograft model. These results indicate that in addition to its known activity against several tyrosine-kinase-mediated proliferative pathways, Nilotinib is a direct inhibitor of the Hh pathway. The newly discovered extension of Nilotinib's target profile holds promise for the treatment of Hh-dependent cancers

Comparisons of Flutter Analyses for an Experimental Fan

Two propulsion aeroelasticity codes were used to model the aeroelastic characteristics of an experimental forward-swept fan that encountered flutter during wind tunnel testing. Both of these three-dimensional codes model the unsteady flowfield due to blade vibrations using the Navier-Stokes equations. In the first approach, the unsteady flow equations are solved using an implicit time-marching approach. In the second approach, the unsteady flow equations are converted to a harmonic balance form and solved using a pseudo-time marching method. This paper describes the flutter calculations and compares the results to experimental measurements