1,357,192 research outputs found
Adda
No full textThis chapter is a creative, imaginative exercise. I shape a literary, oral form of conversation from Bengal, adda - into a scholarly method for relating life, law and literature at a post-colonial location. Adda belongs to an artistic and literary genre where it is not solely a tradition of letters, or only about public and published texts, but is embedded in a linguistic tradition in the form of the oral or moukhik. I re-work this oral tradition to engage with activist literature authored by a sex worker collective in India called DMSC, and to tell a story about the productions of a sex worker feminist jurisprudence. Adda as method helps acknowledge the productions of feminist jurisprudential knowledge as a form and expression of relationships. Simultaneously, it helps illustrate how legal imaginations are tied to everyday speech, proximate forms of cohabitation, shared intonations and expressions, aesthetic sensibilities and relational forms of living, of which the activists' texts are a part. As a feminist intellectual project in law and literature, my method is motivated by an impulse to enliven how the art of conversations found the relations which inform feminist intellectual practices of law
Capabilities of the ADDA code for nanophotonics
No full textInternational audienceThe open-source code ADDA (https://github.com/adda-team/adda) is based on the discrete dipole approximation (DDA) – a numerically exact method derived from the frequency-domain volume-integral formulation of the Maxwell equations [1]. It can simulate interaction of electromagnetic fields (scattering and absorption) with finite 3D objects of arbitrary shape and composition. Besides standard sequential execution on a CPU or a GPU, ADDA can run on a multiprocessor distributed-memory system, parallelizing a single DDA calculation. This together with almost linear scaling of computational complexity with the number of dipoles (discretization voxels) allows huge system sizes and/or fine discretization levels. The code is written in C99, is highly portable, and includes a graphical user interface.ADDA provides full control over the scattering geometry (particle morphology and orientation, incident beam) and allows one to calculate a wide variety of integral and angle-resolved quantities. In addition to far-field scattering by various beams (including built-in Gaussian and Bessel ones), this includes near fields as well as excitation by a point dipole or a fast electron. Moreover, ADDA can rigorously and efficiently simulate the scattering by particles near a plane homogeneous substrate or placed in a homogeneous absorbing host medium. It also incorporates many DDA improvements aimed at increasing both the accuracy and computational speed.At the conference we will describe the main features of ADDA, including the ones still in development, with special emphasis on nanoparticles. They include a wide range of built-in Bessel beams [2] and simulations of electron energy-loss spectroscopy (EELS) and cathodoluminescence [3]. The latter two can be computed in an arbitrary passive host medium, even when the electron emits the Cherenkov radiation, or for particles on top of a semi-infinite substrate (under certain approximations). These capabilities also generalize the concept of the Purcell effect, which ADDA can rigorously compute in free space or near a substrate. Placing a point source inside a nanoparticle allows one to calculate near-field radiative heat transfer or Casimir forces between two objects. Recent numerical improvements include block- or shifted iterative methods to accelerate computations for multiple incident beams (e.g., particle orientations) or refractive indices.References:[1] M.A. Yurkin and A.G. Hoekstra, “The discrete-dipole-approximation code ADDA: Capabilities and known limitations,” J. Quant. Spectrosc. Radiat. Transfer 112, 2234–2247 (2011).[2] S.A. Glukhova and M.A. Yurkin, “Vector Bessel beams: General classification and scattering simulations,” Phys. Rev. A 106, 033508 (2022).[3] A.A. Kichigin and M.A. Yurkin, “Simulating electron energy-loss spectroscopy and cathodoluminescence for particles in arbitrary host medium using the discrete dipole approximation,” J. Phys. Chem. C 127, 4154–4167 (2023)
Gebel Adda and its environs: 50 years on
No full text[First paragraph] Following the 2015 Kirwan Memorial Lecture delivered by Dr Grzymski (see also Grzymski 2010) this
further brief article concerning the ARCE excavations at Gebel Adda has been prepared drawing on
personal records of one of the participants (RH) and information provided by Horst Jaritz and the late
Richard Edlund1 relating to a range of archaeological material in and around Gebel Adda. This
summarises a much more extensive series of notes prepared by the first author (RH) along with
drawings and photographs. With the aid of aerial photographs from the collections of George Gerster
a composite map of Gebel Adda and its environs has also been prepared (fig.1) indicating some of the
main sites in and around the ARCE concession including the outlines of the main cemeteries. It is
hoped that this may be useful for those working with the various published reports which lack
supporting mapping/plans
Gebel Adda and its environs: 50 years on
No full text[First paragraph] Following the 2015 Kirwan Memorial Lecture delivered by Dr Grzymski (see also Grzymski 2010) this
further brief article concerning the ARCE excavations at Gebel Adda has been prepared drawing on
personal records of one of the participants (RH) and information provided by Horst Jaritz and the late
Richard Edlund1 relating to a range of archaeological material in and around Gebel Adda. This
summarises a much more extensive series of notes prepared by the first author (RH) along with
drawings and photographs. With the aid of aerial photographs from the collections of George Gerster
a composite map of Gebel Adda and its environs has also been prepared (fig.1) indicating some of the
main sites in and around the ARCE concession including the outlines of the main cemeteries. It is
hoped that this may be useful for those working with the various published reports which lack
supporting mapping/plans
Recent developments of the ADDA code
No full textInternational audienceThe open-source code ADDA (https://github.com/adda-team/adda) is based on the discrete dipoleapproximation (DDA) – a numerically exact method derived from the frequency-domain volume-integralformulation of Maxwell’s equations [1]. It can simulate the interaction of electromagnetic fields(scattering and absorption) with finite 3D objects of arbitrary shape and composition. Besides standardsequential execution on a single CPU or GPU, ADDA can run on a multiprocessor distributed-memorysystem, parallelizing a single DDA calculation. This, combined with the almost linear scaling ofcomputational complexity with the number of dipoles (discretization voxels), allows large system sizesand/or fine discretization levels.ADDA is written in C99 and is highly portable. It provides full control over the scattering geometry(particle morphology and orientation, incident beam) and allows users to calculate a wide variety ofintegral and angle-resolved quantities. In addition to far-field scattering by various beams (includingbuilt-in Gaussian and Bessel beams), this includes near fields as well as excitation by a point dipole or afast electron. Moreover, ADDA can rigorously and efficiently simulate the scattering by particles near aplane homogeneous substrate or embedded in a homogeneous absorbing host medium. It alsoincorporates many DDA improvements aimed at increasing both accuracy and computational speed.In this talk we will focus on the recently implemented ADDA features, either incorporated into themain codebase or available in separate development branches. These include a wide range of built-inBessel beams [2] and simulations of electron energy-loss spectroscopy (EELS) and cathodoluminescence[3]. The latter two can be computed in an arbitrary passive host medium, even when the electron emitsthe Cherenkov radiation, or for particles on top of a semi-infinite substrate (under certainapproximations). These capabilities also generalize the concept of the Purcell factor (i.e., theenhancement of a point-dipole emitter), which ADDA can rigorously compute in free space or near asubstrate [4].Next, we will discuss the analytical approximations of Green’s-tensor integrals for the correspondingDDA formulation, known as IGT, as well as various enhancements to the iterative solvers. Theseenhancements include block- or shifted iterative methods to accelerate computations for multipleincident beams (e.g., particle orientations) or refractive indices, as well as the use of specialized initialguesses for large particles [5]. Finally, many of these features are accessible through a graphical userinterface and we are actively working on integrating ADDA with Spack – a package manager thatfacilitates installation on a wide range of systems, including supercomputing environments.[1] M. A. Yurkin and A. G. Hoekstra, J. Quant. Spectrosc. Radiat. Transfer 112, 2234 (2011).[2] S. A. Glukhova and M. A. Yurkin, Phys. Rev. A 106, 033508 (2022).[3] A. A. Kichigin and M. A. Yurkin, J. Phys. Chem. C 127, 4154 (2023).[4] A. E. Moskalensky and M. A. Yurkin, Phys. Rev. A 99, 053824 (2019).[5] K. G. Inzhevatkin and M. A. Yurkin, J. Quant. Spectrosc. Radiat. Transfer 277, 107965 (2022)
Nocheta adda Rolston 1980
No full textNocheta adda Rolston, 1980 Examined material (n=16): Pará. 4 ♂, Parauapebas, Serraria, Serra Norte, 8 ♂ 3 ♀, Pojuca. Acre. 1 ♀, Rio Branco. Distribution. Rolston et al. (1980) described Nocheta adda based in a male from Brazilian Amazon, but did not mentioned the state. A—Pará and Acre. C—Suriname (Rolston et al. 1980; Grazia 1989).Published as part of Silva, Valeria Juliete Da, Santos, Cleverson Rannieri Meira Dos & Fernandes, Jose Antonio Marin, 2018, Stink bugs (Hemiptera: Pentatomidae) from Brazilian Amazon: checklist and new records, pp. 401-455 in Zootaxa 4425 (3) on page 443, DOI: 10.11646/zootaxa.4425.3.1, http://zenodo.org/record/126751
Economic Activity and the Spread of Viral Diseases: Evidence from High Frequency Data
No full textViruses are a major threat to human health, and - given that they spread through social interactions - represent a costly externality. This paper addresses three main issues: i) what are the unintended consequences of economic activity on the spread of infections? ii) how efficient are measures that limit interpersonal contacts? iii) how do we allocate our scarce resources to limit their spread? To answer these questions, we use novel high frequency data from France on the incidence of a number of viral diseases across space, for different age groups, over a period of a quarter of a century. We use quasi-experimental variation to evaluate the importance of policies reducing inter-personal contacts such as school closures or the closure of public transportation networks. While these policies significantly reduce disease prevalence, we find that they are not cost-effective. We find that expansions of transportation networks have significant health costs in increasing the spread of viruses and that propagation rates are pro-cyclically sensitive to economic conditions and increase with inter-regional trade
Improved diastolic function in type 2 diabetes after a six month liraglutide treatment
No full textAbstractAimsTo investigate whether liraglutide improves diastolic function in type 2 diabetes.MethodsThirty-seven patients with type 2 diabetes who began liraglutide therapy between June 2013 and May 2014 were enrolled in this observational, prospective study. 26 patients received liraglutide therapy for at least 6months. The remaining 11 patients withdrew from liraglutide therapy during the first month, were started on other hypoglycaemic therapies and formed the control group. Anthropometric, metabolic and echocardiographic parameters including pulsed wave tissue Doppler imaging were evaluated at baseline and at 6months.ResultsIn the liraglutide group the early diastolic mitral annulus velocity on the lateral (e-lat) and medial (e-med) sides of the mitral annulus increased from 9.2±3.4 to 11.6±4.7cm/s (p<0.001) and from 6.9±1.7 to 8.4±2.6cm/s (p<0.003), respectively. The ratio of early-to-late velocities on the lateral and medial sides of the mitral annulus increased from 0.7±0.3 to 0.9±0.4 (p<0.001) and from 0.5±0.1 to 0.6±0.1 (p<0.02), respectively. The ratio of early diastolic mitral inflow velocity to early diastolic myocardial relaxation velocity decreased from 10.7±4.3 to 8.5±2.5 (p<0.005). No improvements in diastolic function was detected in the control group. Glucose control improved similarly in both groups: HA1bc −1.5% (−17mmol/mol) vs −1.3% (−14mmol/mol), p=0.67.ConclusionsIn patients with type 2 diabetes, 6months liraglutide treatment was associated with a significant improvement in diastolic function
The discrete-dipole-approximation code ADDA: capabilities and known limitations
No full textThe open-source code ADDA is described, which implements the discrete dipole approximation (DDA), a method to simulate light scattering by finite 3D objects of arbitrary shape and composition. Besides standard sequential execution, ADDA can run on a multiprocessor distributed-memory system, parallelizing a single DDA calculation. Hence the size parameter of the scatterer is in principle limited only by total available memory and computational speed. ADDA is written in C99 and is highly portable. It provides full control over the scattering geometry (particle morphology and orientation, and incident beam) and allows one to calculate a wide variety of integral and angle-resolved scattering quantities (cross sections, the Mueller matrix, etc.). Moreover, ADDA incorporates a range of state-of-the-art DDA improvements, aimed at increasing the accuracy and computational speed of the method. We discuss both physical and computational aspects of the DDA simulations and provide a practical introduction into performing such simulations with the ADDA code. We also present several simulation results, in particular, for a sphere with size parameter 320 (100-wavelength diameter) and refractive index 1.05
The Enantiospecific Total Syntheses of Adda and Nodularin
No full text164 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999.The unusual amino acid (2S, 3S, 4 E, 6E, 8S, 9S)-3-amino-9-methoxy-2,6,8-trimethyl-10-phenyl-4,6-decadienoic acid (Adda) is a structural component of nodularin that has been reported to be necessary for biological activity. The complexity of Adda has hindered the completion of structure activity relationship (SAR) studies. This work has focused on development of procedures to synthesize Adda. As a result, novel methodology has been developed and employed to synthesize N -Boc-Adda in 40% overall yield in a 13 step linear synthesis. A convergent synthesis of N-Boc Adda was developed that provided N-Boc-Adda in 31% overall yield after 16 steps. Both procedures supply the N-Boc-Adda in yields that are several times higher than the best syntheses from commercially available material reported to date. These procedures for the synthesis of N-Boc-Adda should facilitate development of SAR studies to elucidate roles of protein phosphatases in tumor promotion or suppression.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD
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