Aditya Mehra - Academia.edu (original) (raw)

Papers by Aditya Mehra

In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific da... more In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific data visualization and plotting in Python, Enthought Canopy:a comprehensive Python analysis environment and Persistence of Vision Ray Tracer, or POV-Ray, a ray tracing program which generates photo-realistic images from a text-based scene description, a model of the solar tracker was also 3D printed.

International Journal for Research in Applied Science and Engineering Technology, 2021

The main objective of the study is to convert vehicle bump which generated linear motion & vibrat... more The main objective of the study is to convert vehicle bump which generated linear motion & vibration, into electrical energy, which is used for used in battery charging. General vehicle shock absorbers are used to simply absorb this energy without converting it to electrical energy. So, here we put forth a way to use this waste of energy and store it for further needs such as vehicle lights, cooling, indicator lights etc. To achieve this, we here use the principles of electromagnetic induction in order to generate electricity from this motion. Our shock absorber is made up of a metal shaft, spring, magnet, coils, base with screws and joints. It uses a coil wound around in particular turning arrangement over the inner beam of the part. We use cylindrical supports in order to minimize friction and ensure smooth generation. The head of the absorber consists of magnets attached to outer core which are aligned with inner core to ensure smooth motion while ensuring efficient generation. This arrangement is fitted with springs in a precise manner so as to achieve the desired motion and magnet coil overlapping which allows for generation of electricity through electromagnetic induction principle.

arXiv (Cornell University), Feb 26, 2023

Field-theoretic description of Carrollian theories has largely remained classical so far. In this... more Field-theoretic description of Carrollian theories has largely remained classical so far. In this paper, we attempt to study the renormalization of Carrollian gauge field theories via path integral techniques. The case of Carrollian electrodynamics minimally coupled to a massive Carrollian scalar is considered. We report potential problems such as IR divergences and mass shell singularity cropping up at the first order in the perturbation. Perhaps, the most important result that we report is how conventional arguments for gauge independence for mass and coupling are invalidated for a gauge theory in a Carrollian setting. As of now, the renormalization of Carrollian gauge field theories seems to suffer from unphysical ramifications. Possible cures to resolve these issues are suggested.

Physical Review D

Field-theoretic descriptions of Carrollian theories have largely remained classical so far. In th... more Field-theoretic descriptions of Carrollian theories have largely remained classical so far. In this paper, we attempt to study the renormalization of Carrollian gauge field theories via path integral techniques. The case of Carrollian electrodynamics minimally coupled to a massive Carrollian scalar is considered. We report potential problems such as IR divergences and mass-shell singularity cropping up at the first order in the perturbation. Perhaps, the most important result that we report is how conventional arguments for gauge independence for mass and coupling are invalidated for a gauge theory in a Carrollian setting. As of now, the renormalization of Carrollian gauge field theories seems to suffer from unphysical ramifications. Possible cures to resolve these issues are suggested.

arXiv (Cornell University), Feb 26, 2023

Field-theoretic description of Carrollian theories has largely remained classical so far. In this... more Field-theoretic description of Carrollian theories has largely remained classical so far. In this paper, we attempt to study the renormalization of Carrollian gauge field theories via path integral techniques. The case of Carrollian electrodynamics minimally coupled to a massive Carrollian scalar is considered. We report potential problems such as IR divergences and mass shell singularity cropping up at the first order in the perturbation. Perhaps, the most important result that we report is how conventional arguments for gauge independence for mass and coupling are invalidated for a gauge theory in a Carrollian setting. As of now, the renormalization of Carrollian gauge field theories seems to suffer from unphysical ramifications. Possible cures to resolve these issues are suggested.

In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific da... more In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific data visualization and plotting in Python, Enthought Canopy:a comprehensive Python analysis environment and Persistence of Vision Ray Tracer, or POV-Ray, a ray tracing program which generates photo-realistic images from a text-based scene description, a model of the solar tracker was also 3D printed.

Cardiology in Review, 2008

Journal of High Energy Physics, 2020

We argue that generic field theories defined on null manifolds should have an emergent BMS or con... more We argue that generic field theories defined on null manifolds should have an emergent BMS or conformal Carrollian structure. We then focus on a simple interacting conformal Carrollian theory, viz. Carrollian scalar electrodynamics. We look at weak (on-shell) and strong invariance (off-shell) of its equations of motion under conformal Carrollian symmetries. Helmholtz conditions are necessary and sufficient conditions for a set of equations to arise from a Lagrangian. We investigate whether the equations of motion of Carrollian scalar electrodynamics satisfy these conditions. Then we proposed an action for the electric sector of the theory. This action is the first example for an interacting conformal Carrollian Field Theory. The proposed action respects the finite and infinite conformal Carrollian symmetries in d = 4. We calculate conserved charges corresponding to these finite and infinite symmetries and then rewrite the conserved charges in terms of the canonical variables. We fin...

Journal of High Energy Physics, 2019

Conformal Carrollian groups are known to be isomorphic to Bondi-Metzner-Sachs (BMS) groups that a... more Conformal Carrollian groups are known to be isomorphic to Bondi-Metzner-Sachs (BMS) groups that arise as the asymptotic symmetries at the null boundary of Minkowski spacetime. The Carrollian algebra is obtained from the Poincare algebra by taking the speed of light to zero, and the conformal version similarly follows. In this paper, we construct explicit examples of Conformal Carrollian field theories as limits of relativistic conformal theories, which include Carrollian versions of scalars, fermions, electromagnetism, Yang-Mills theory and general gauge theories coupled to matter fields. Due to the isomorphism with BMS symmetries, these field theories form prototypical examples of holographic duals to gravitational theories in asymptotically flat spacetimes. The intricacies of the limiting procedure leads to a plethora of different Carrollian sectors in the gauge theories we consider. Concentrating on the equations of motion of these theories, we show that even in dimensions d = 4,...

Journal of High Energy Physics, 2018

We perform a detailed analysis of Galilean field theories, starting with free theories and then i... more We perform a detailed analysis of Galilean field theories, starting with free theories and then interacting theories. We consider non-relativistic versions of massless scalar and Dirac field theories before we go on to review our previous construction of Galilean Electrodynamics and Galilean Yang-Mills theory. We show that in all these cases, the field theories exhibit non-relativistic conformal structure (in appropriate dimensions). The surprising aspect of the analysis is that the non-relativistic conformal structure exhibited by these theories, unlike relativistic conformal invariance, becomes infinite dimensional even in spacetime dimensions greater than two. We then couple matter with Galilean gauge theories and show that there is a myriad of different sectors that arise in the non-relativistic limit from the parent relativistic theories. In every case, if the parent relativistic theory exhibited conformal invariance, we find an infinitely enhanced Galilean conformal invariance...

Journal of High Energy Physics, 2016

Assuming the existence of a field theory in D dimensions dual to (D + 1)dimensional flat space, g... more Assuming the existence of a field theory in D dimensions dual to (D + 1)dimensional flat space, governed by the asymptotic symmetries of flat space, we make some preliminary remarks about the properties of this field theory. We review briefly some successes of the 3d bulk-2d boundary case and then focus on the 4d bulk-3d boundary example, where the symmetry in question is the infinite dimensional BMS 4 algebra. We look at the constraints imposed by this symmetry on a 3d field theory by constructing highest weight representations of this algebra. We construct two and three point functions of BMS primary fields and surprisingly find that symmetries constrain these correlators to be identical to those of a 2d relativistic conformal field theory. We then go one dimension higher and construct prototypical examples of 4d field theories which are putative duals of 5d Minkowski spacetimes. These field theories are ultra-relativistic limits of electrodynamics and Yang-Mills theories which exhibit invariance under the conformal Carroll group in D = 4. We explore the different sectors within these Carrollian gauge theories and investigate the symmetries of the equations of motion to find that an infinite ultra-relativistic conformal structure arises in each case.

Journal of High Energy Physics, 2016

We investigate the symmetry structure of the non-relativistic limit of Yang-Mills theories. Gener... more We investigate the symmetry structure of the non-relativistic limit of Yang-Mills theories. Generalising previous results in the Galilean limit of electrodynamics, we discover that for Yang-Mills theories there are a variety of limits inside the Galilean regime. We first explicitly work with the SU(2) theory and then generalise to SU(N) for all N , systematising our notation and analysis. We discover that the whole family of limits lead to different sectors of Galilean Yang-Mills theories and the equations of motion in each sector exhibit hitherto undiscovered infinite dimensional symmetries, viz. infinite Galilean Conformal symmetries in D = 4. These provide the first examples of interacting Galilean Conformal Field Theories (GCFTs) in D > 2.

Heart Rhythm, 2005

Intracardiac echocardiogram (ICE) was used to guide transseptal puncture in difficult cases. Tota... more Intracardiac echocardiogram (ICE) was used to guide transseptal puncture in difficult cases. Totally 12 patients (2.4%) had failed transseptal catheterization procedure in the primary procedures and 3 patients (4%) had failed transseptal catheterization in the repeated ablation procedures (Table). Three major causes of failure were noted, including 2 cases with a high position of fossa ovalis close to the aortic root, 9 cases with thick septum and the long sheaths cannot pass through, and 4 cases with significant tenting (the distance between puncture needle tip in the tented septum and left atrial posterior wall Ͻ5 mm) during ICE guidance. The atrial septum was significantly thicker in the 9 patients with failure of the long sheath passing the septum than the age-and sex-matched patients (nϭ 18) with successful transseptal catheterization (2.9Ϯ0.9 vs 1.2Ϯ0.3 mm, PϽ0.001, measured by transesophageal echo). Conclusions: The incidence of failed transseptal catheterization was quite low in the first and repeated procedures. High position of fossa ovalis, thick septum and significant tenting were the main causes.

Journal of High Energy Physics, 2016

We define a 'non-relativistic conformal method', based on a Schrödinger algebra with critical exp... more We define a 'non-relativistic conformal method', based on a Schrödinger algebra with critical exponent z = 2, as the non-relativistic version of the relativistic conformal method. An important ingredient of this method is the occurrence of a complex compensating scalar field that transforms under both scale and central charge transformations. We apply this non-relativistic method to derive the curved space Newton-Cartan gravity equations of motion with twistless torsion. Moreover, we reproduce z = 2 Hořava-Lifshitz gravity by classifying all possible Schrödinger invariant scalar field theories of a complex scalar up to second order in time derivatives.

The Internet Journal of Cardiology, 2010

Takotsubo cardiomyopathy is a rare disease that mimics the presentation of acute coronary syndrom... more Takotsubo cardiomyopathy is a rare disease that mimics the presentation of acute coronary syndrome. A fatal case with unique findings of global subendocardial ischemia as well as histologic evidence of microvascular and intramyocardial C4d deposition on endomyocardial biopsy and at autopsy is herein presented.

Malting characteristics of 2 bread and 14 durum Indian wheat varieties were determined and the po... more Malting characteristics of 2 bread and 14 durum Indian wheat varieties were determined and the possible correlation between the physical parameters and chemical composition of these varieties with their malting qualities were examined. Wide variations with respect to 1000 kernel weight (33.4-53.8 g) and volume (24.7-38.0 ml), grain hardness (12.6-24.9 BU), protein (10.7-14.2%) and starch (64.8-72.3%) contents were observed among the cultivars. The amy1ase activity of the native wheat ranged from 6.8 x 103 -1.1 X 104 MU and it increased to 1.2 x 104 -2.8 104 MU on germination for 72 h.. The increase in amylase activity was negatively correlated with grain hardness (r = -0.8464***) as well as the starch content (r = -0.8298***) and its relationship with the protein content of the cultivars was non-significant. Based on the amylase activity of the malted samples, 'HD 2189' (bread wheat) and 'D 651' (durum wheat) varieties were classified as a good and a poor malt variet...

Cardiovascular Revascularization Medicine, 2012

Background-Drug eluting stent (DES) failure including restenosis and stent thrombosis, or disease... more Background-Drug eluting stent (DES) failure including restenosis and stent thrombosis, or disease progression may result in target vessel revascularization (TVR) but the relative contribution of these mechanisms in the DES era is not well described. We sought to examine the predictors and presentations of patients with clinically driven TVR after DES. Methods-Patients with all lesions treated with a DES in the Dynamic Registry from 2004 to 2006 were analyzed. Included were 2691 patients with 3401 lesions. Patients with and without incident clinically driven TVR at 2 years were compared according to baseline clinical, procedural, and angiographic characteristics and independent predictors of TVR and target lesion revascularization (TLR) were determined by multivariate analysis. Results-By 2-years, TVR occurred in 7.2% of patients and TLR in 3.8%, with 71.6% and 82.5% of repeat revascularization events occurring in the first year, respectively. The indication for first TVR was myocardial infarction in 18.6 % (n=34), unstable angina in 42.6 % (n=78), stable coronary disease in 25.7% (n=47) and other/unknown 13.1% (n=24). Disease progression was responsible for 47% of TVR. Among patients with TLR, restenosis was the mechanism in 86.6% and stent thrombosis in 13.4%. Independent predictors of TVR included younger age, diabetes, attempted graft lesion, lesion length >30mm and prior lesion intervention. Independent predictors of TVR and TLR were similar. Conclusion-The incidence of clinically driven TVR is low in patients treated with DES and nearly half is attributable to disease progression, which along with the low rate of in-stent restenosis explains why the mode of presentation is often an acute coronary syndrome.

Cardiovascular Pathology, 2010

An aneurysm of the portion of the right atrium classically referred to as the subeustachian sinus... more An aneurysm of the portion of the right atrium classically referred to as the subeustachian sinus is reported in a 75-year-old man with cardiac amyloidosis, AL phenotype, related to underlying multiple myeloma. A review of literature confirms the rarity of nonseptal right atrial aneurysms and their propensity to involve the subeustachian area of the right atrium which may be an intrinsic area of weakness in the atrial wall. The coincident amyloidosis in our current case suggests that hemodynamic factors may have played a role in the development of the aneurysm.

In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific da... more In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific data visualization and plotting in Python, Enthought Canopy:a comprehensive Python analysis environment and Persistence of Vision Ray Tracer, or POV-Ray, a ray tracing program which generates photo-realistic images from a text-based scene description, a model of the solar tracker was also 3D printed.

International Journal for Research in Applied Science and Engineering Technology, 2021

The main objective of the study is to convert vehicle bump which generated linear motion & vibrat... more The main objective of the study is to convert vehicle bump which generated linear motion & vibration, into electrical energy, which is used for used in battery charging. General vehicle shock absorbers are used to simply absorb this energy without converting it to electrical energy. So, here we put forth a way to use this waste of energy and store it for further needs such as vehicle lights, cooling, indicator lights etc. To achieve this, we here use the principles of electromagnetic induction in order to generate electricity from this motion. Our shock absorber is made up of a metal shaft, spring, magnet, coils, base with screws and joints. It uses a coil wound around in particular turning arrangement over the inner beam of the part. We use cylindrical supports in order to minimize friction and ensure smooth generation. The head of the absorber consists of magnets attached to outer core which are aligned with inner core to ensure smooth motion while ensuring efficient generation. This arrangement is fitted with springs in a precise manner so as to achieve the desired motion and magnet coil overlapping which allows for generation of electricity through electromagnetic induction principle.

arXiv (Cornell University), Feb 26, 2023

Field-theoretic description of Carrollian theories has largely remained classical so far. In this... more Field-theoretic description of Carrollian theories has largely remained classical so far. In this paper, we attempt to study the renormalization of Carrollian gauge field theories via path integral techniques. The case of Carrollian electrodynamics minimally coupled to a massive Carrollian scalar is considered. We report potential problems such as IR divergences and mass shell singularity cropping up at the first order in the perturbation. Perhaps, the most important result that we report is how conventional arguments for gauge independence for mass and coupling are invalidated for a gauge theory in a Carrollian setting. As of now, the renormalization of Carrollian gauge field theories seems to suffer from unphysical ramifications. Possible cures to resolve these issues are suggested.

Physical Review D

Field-theoretic descriptions of Carrollian theories have largely remained classical so far. In th... more Field-theoretic descriptions of Carrollian theories have largely remained classical so far. In this paper, we attempt to study the renormalization of Carrollian gauge field theories via path integral techniques. The case of Carrollian electrodynamics minimally coupled to a massive Carrollian scalar is considered. We report potential problems such as IR divergences and mass-shell singularity cropping up at the first order in the perturbation. Perhaps, the most important result that we report is how conventional arguments for gauge independence for mass and coupling are invalidated for a gauge theory in a Carrollian setting. As of now, the renormalization of Carrollian gauge field theories seems to suffer from unphysical ramifications. Possible cures to resolve these issues are suggested.

arXiv (Cornell University), Feb 26, 2023

Field-theoretic description of Carrollian theories has largely remained classical so far. In this... more Field-theoretic description of Carrollian theories has largely remained classical so far. In this paper, we attempt to study the renormalization of Carrollian gauge field theories via path integral techniques. The case of Carrollian electrodynamics minimally coupled to a massive Carrollian scalar is considered. We report potential problems such as IR divergences and mass shell singularity cropping up at the first order in the perturbation. Perhaps, the most important result that we report is how conventional arguments for gauge independence for mass and coupling are invalidated for a gauge theory in a Carrollian setting. As of now, the renormalization of Carrollian gauge field theories seems to suffer from unphysical ramifications. Possible cures to resolve these issues are suggested.

In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific da... more In this work, we have created a realistic model of a solar tracker using Mayavi: 3D scientific data visualization and plotting in Python, Enthought Canopy:a comprehensive Python analysis environment and Persistence of Vision Ray Tracer, or POV-Ray, a ray tracing program which generates photo-realistic images from a text-based scene description, a model of the solar tracker was also 3D printed.

Cardiology in Review, 2008

Journal of High Energy Physics, 2020

We argue that generic field theories defined on null manifolds should have an emergent BMS or con... more We argue that generic field theories defined on null manifolds should have an emergent BMS or conformal Carrollian structure. We then focus on a simple interacting conformal Carrollian theory, viz. Carrollian scalar electrodynamics. We look at weak (on-shell) and strong invariance (off-shell) of its equations of motion under conformal Carrollian symmetries. Helmholtz conditions are necessary and sufficient conditions for a set of equations to arise from a Lagrangian. We investigate whether the equations of motion of Carrollian scalar electrodynamics satisfy these conditions. Then we proposed an action for the electric sector of the theory. This action is the first example for an interacting conformal Carrollian Field Theory. The proposed action respects the finite and infinite conformal Carrollian symmetries in d = 4. We calculate conserved charges corresponding to these finite and infinite symmetries and then rewrite the conserved charges in terms of the canonical variables. We fin...

Journal of High Energy Physics, 2019

Conformal Carrollian groups are known to be isomorphic to Bondi-Metzner-Sachs (BMS) groups that a... more Conformal Carrollian groups are known to be isomorphic to Bondi-Metzner-Sachs (BMS) groups that arise as the asymptotic symmetries at the null boundary of Minkowski spacetime. The Carrollian algebra is obtained from the Poincare algebra by taking the speed of light to zero, and the conformal version similarly follows. In this paper, we construct explicit examples of Conformal Carrollian field theories as limits of relativistic conformal theories, which include Carrollian versions of scalars, fermions, electromagnetism, Yang-Mills theory and general gauge theories coupled to matter fields. Due to the isomorphism with BMS symmetries, these field theories form prototypical examples of holographic duals to gravitational theories in asymptotically flat spacetimes. The intricacies of the limiting procedure leads to a plethora of different Carrollian sectors in the gauge theories we consider. Concentrating on the equations of motion of these theories, we show that even in dimensions d = 4,...

Journal of High Energy Physics, 2018

We perform a detailed analysis of Galilean field theories, starting with free theories and then i... more We perform a detailed analysis of Galilean field theories, starting with free theories and then interacting theories. We consider non-relativistic versions of massless scalar and Dirac field theories before we go on to review our previous construction of Galilean Electrodynamics and Galilean Yang-Mills theory. We show that in all these cases, the field theories exhibit non-relativistic conformal structure (in appropriate dimensions). The surprising aspect of the analysis is that the non-relativistic conformal structure exhibited by these theories, unlike relativistic conformal invariance, becomes infinite dimensional even in spacetime dimensions greater than two. We then couple matter with Galilean gauge theories and show that there is a myriad of different sectors that arise in the non-relativistic limit from the parent relativistic theories. In every case, if the parent relativistic theory exhibited conformal invariance, we find an infinitely enhanced Galilean conformal invariance...

Journal of High Energy Physics, 2016

Assuming the existence of a field theory in D dimensions dual to (D + 1)dimensional flat space, g... more Assuming the existence of a field theory in D dimensions dual to (D + 1)dimensional flat space, governed by the asymptotic symmetries of flat space, we make some preliminary remarks about the properties of this field theory. We review briefly some successes of the 3d bulk-2d boundary case and then focus on the 4d bulk-3d boundary example, where the symmetry in question is the infinite dimensional BMS 4 algebra. We look at the constraints imposed by this symmetry on a 3d field theory by constructing highest weight representations of this algebra. We construct two and three point functions of BMS primary fields and surprisingly find that symmetries constrain these correlators to be identical to those of a 2d relativistic conformal field theory. We then go one dimension higher and construct prototypical examples of 4d field theories which are putative duals of 5d Minkowski spacetimes. These field theories are ultra-relativistic limits of electrodynamics and Yang-Mills theories which exhibit invariance under the conformal Carroll group in D = 4. We explore the different sectors within these Carrollian gauge theories and investigate the symmetries of the equations of motion to find that an infinite ultra-relativistic conformal structure arises in each case.

Journal of High Energy Physics, 2016

We investigate the symmetry structure of the non-relativistic limit of Yang-Mills theories. Gener... more We investigate the symmetry structure of the non-relativistic limit of Yang-Mills theories. Generalising previous results in the Galilean limit of electrodynamics, we discover that for Yang-Mills theories there are a variety of limits inside the Galilean regime. We first explicitly work with the SU(2) theory and then generalise to SU(N) for all N , systematising our notation and analysis. We discover that the whole family of limits lead to different sectors of Galilean Yang-Mills theories and the equations of motion in each sector exhibit hitherto undiscovered infinite dimensional symmetries, viz. infinite Galilean Conformal symmetries in D = 4. These provide the first examples of interacting Galilean Conformal Field Theories (GCFTs) in D > 2.

Heart Rhythm, 2005

Intracardiac echocardiogram (ICE) was used to guide transseptal puncture in difficult cases. Tota... more Intracardiac echocardiogram (ICE) was used to guide transseptal puncture in difficult cases. Totally 12 patients (2.4%) had failed transseptal catheterization procedure in the primary procedures and 3 patients (4%) had failed transseptal catheterization in the repeated ablation procedures (Table). Three major causes of failure were noted, including 2 cases with a high position of fossa ovalis close to the aortic root, 9 cases with thick septum and the long sheaths cannot pass through, and 4 cases with significant tenting (the distance between puncture needle tip in the tented septum and left atrial posterior wall Ͻ5 mm) during ICE guidance. The atrial septum was significantly thicker in the 9 patients with failure of the long sheath passing the septum than the age-and sex-matched patients (nϭ 18) with successful transseptal catheterization (2.9Ϯ0.9 vs 1.2Ϯ0.3 mm, PϽ0.001, measured by transesophageal echo). Conclusions: The incidence of failed transseptal catheterization was quite low in the first and repeated procedures. High position of fossa ovalis, thick septum and significant tenting were the main causes.

Journal of High Energy Physics, 2016

We define a 'non-relativistic conformal method', based on a Schrödinger algebra with critical exp... more We define a 'non-relativistic conformal method', based on a Schrödinger algebra with critical exponent z = 2, as the non-relativistic version of the relativistic conformal method. An important ingredient of this method is the occurrence of a complex compensating scalar field that transforms under both scale and central charge transformations. We apply this non-relativistic method to derive the curved space Newton-Cartan gravity equations of motion with twistless torsion. Moreover, we reproduce z = 2 Hořava-Lifshitz gravity by classifying all possible Schrödinger invariant scalar field theories of a complex scalar up to second order in time derivatives.

The Internet Journal of Cardiology, 2010

Takotsubo cardiomyopathy is a rare disease that mimics the presentation of acute coronary syndrom... more Takotsubo cardiomyopathy is a rare disease that mimics the presentation of acute coronary syndrome. A fatal case with unique findings of global subendocardial ischemia as well as histologic evidence of microvascular and intramyocardial C4d deposition on endomyocardial biopsy and at autopsy is herein presented.

Malting characteristics of 2 bread and 14 durum Indian wheat varieties were determined and the po... more Malting characteristics of 2 bread and 14 durum Indian wheat varieties were determined and the possible correlation between the physical parameters and chemical composition of these varieties with their malting qualities were examined. Wide variations with respect to 1000 kernel weight (33.4-53.8 g) and volume (24.7-38.0 ml), grain hardness (12.6-24.9 BU), protein (10.7-14.2%) and starch (64.8-72.3%) contents were observed among the cultivars. The amy1ase activity of the native wheat ranged from 6.8 x 103 -1.1 X 104 MU and it increased to 1.2 x 104 -2.8 104 MU on germination for 72 h.. The increase in amylase activity was negatively correlated with grain hardness (r = -0.8464***) as well as the starch content (r = -0.8298***) and its relationship with the protein content of the cultivars was non-significant. Based on the amylase activity of the malted samples, 'HD 2189' (bread wheat) and 'D 651' (durum wheat) varieties were classified as a good and a poor malt variet...

Cardiovascular Revascularization Medicine, 2012

Background-Drug eluting stent (DES) failure including restenosis and stent thrombosis, or disease... more Background-Drug eluting stent (DES) failure including restenosis and stent thrombosis, or disease progression may result in target vessel revascularization (TVR) but the relative contribution of these mechanisms in the DES era is not well described. We sought to examine the predictors and presentations of patients with clinically driven TVR after DES. Methods-Patients with all lesions treated with a DES in the Dynamic Registry from 2004 to 2006 were analyzed. Included were 2691 patients with 3401 lesions. Patients with and without incident clinically driven TVR at 2 years were compared according to baseline clinical, procedural, and angiographic characteristics and independent predictors of TVR and target lesion revascularization (TLR) were determined by multivariate analysis. Results-By 2-years, TVR occurred in 7.2% of patients and TLR in 3.8%, with 71.6% and 82.5% of repeat revascularization events occurring in the first year, respectively. The indication for first TVR was myocardial infarction in 18.6 % (n=34), unstable angina in 42.6 % (n=78), stable coronary disease in 25.7% (n=47) and other/unknown 13.1% (n=24). Disease progression was responsible for 47% of TVR. Among patients with TLR, restenosis was the mechanism in 86.6% and stent thrombosis in 13.4%. Independent predictors of TVR included younger age, diabetes, attempted graft lesion, lesion length >30mm and prior lesion intervention. Independent predictors of TVR and TLR were similar. Conclusion-The incidence of clinically driven TVR is low in patients treated with DES and nearly half is attributable to disease progression, which along with the low rate of in-stent restenosis explains why the mode of presentation is often an acute coronary syndrome.

Cardiovascular Pathology, 2010

An aneurysm of the portion of the right atrium classically referred to as the subeustachian sinus... more An aneurysm of the portion of the right atrium classically referred to as the subeustachian sinus is reported in a 75-year-old man with cardiac amyloidosis, AL phenotype, related to underlying multiple myeloma. A review of literature confirms the rarity of nonseptal right atrial aneurysms and their propensity to involve the subeustachian area of the right atrium which may be an intrinsic area of weakness in the atrial wall. The coincident amyloidosis in our current case suggests that hemodynamic factors may have played a role in the development of the aneurysm.