cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Back-reaction and effective acceleration in generic LTB dust models
Creators: name: Sussman, Roberto A
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We provide a thorough examination of the conditions for the existence of back-reaction and an "effective" acceleration (in the context of Buchert's averaging formalism) in regular generic spherically symmetric Lemaitre-Tolman-Bondi (LTB) dust models. By considering arbitrary spherical comoving domains, we verify rigorously the fulfillment of these conditions expressed in terms of suitable scalar variables that are evaluated at the boundary of every domain. Effective deceleration necessarily occurs in all domains in: (a) the asymptotic radial range of models converging to a FLRW background, (b) the asymptotic time range of non-vacuum hyperbolic models, (c) LTB self-similar solutions and (d) near a simultaneous big bang. Accelerating domains are proven to exist in the following scenarios: (i) central vacuum regions, (ii) central (non-vacuum) density voids, (iii) the intermediate radial range of models converging to a FLRW background, (iv) the asymptotic radial range of models converging to a Minkowski vacuum and (v) domains near and/or intersecting a non-simultaneous big bang. All these scenarios occur in hyperbolic models with negative averaged and local spatial curvature, though scenarios (iv) and (v) are also possible in low density regions of a class of elliptic models in which local spatial curvature is negative but its average is positive. Rough numerical estimates between -0.003 and -0.5 were found for the effective deceleration parameter. While the existence of accelerating domains cannot be ruled out in models converging to an Einstein de Sitter background and in domains undergoing gravitational collapse, the conditions for this are very restrictive. The results obtained may provide important theoretical clues on the effects of back-reaction and averaging in more general non-spherical models.
description: Final version accepted for publication in Classical and Quantum Gravity. 47 pages in IOP LaTeX macros, 12 pdf figures
Irrelevant visual faces influence haptic identification of facial expressions of emotion.
Creators: name: Klatzky, Roberta
name: Abramowicz, Aneta
name: Hamilton, Cheryl
name: Lederman, Susan J.
Publisher: name: Carnegie Mellon University
Year: 2011
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: This study demonstrates that when people attempt to identify a facial expression of emotion (FEE) by haptically exploring a 3D facemask, they are affected by viewing a simultaneous, task-irrelevant visual FEE portrayed by another person. In comparison to a control condition, where visual noise was presented, the visual FEE facilitated haptic identification when congruent (visual and haptic FEEs same category). When the visual and haptic FEEs were incongruent, haptic identification was impaired, and error responses shifted toward the visually depicted emotion. In contrast, visual emotion labels that matched or mismatched the haptic FEE category produced no such effects. The findings indicate that vision and touch interact in FEE recognition at a level where featural invariants of the emotional category (cf. precise facial geometry or general concepts) are processed, even when the visual and haptic FEEs are not attributable to a common source. Processing mechanisms behind these effects are considered.
Interacting Dirac Materials
Creators: name: Banerjee, S.
name: Abergel, D. S. L.
name: Ågren, H.
name: Aeppli, G.
name: Balatsky, A. V.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the extent to which the class of Dirac materials in two-dimensions provides general statements about the behavior of both fermionic and bosonic Dirac quasiparticles in the interacting regime. For both quasiparticle types, we find common features for the interaction induced renormalization of the conical Dirac spectrum. We perform the perturbative renormalization analysis and compute the self-energy for both quasiparticle types with different interactions and collate previous results from the literature whenever necessary. Guided by the systematic presentation of our results in Table~\ref{Summary}, we conclude that long-range interactions generically lead to an increase of the slope of the single-particle Dirac cone, whereas short-range interactions lead to a decrease. The quasiparticle statistics does not qualitatively impact the self-energy correction for long-range repulsion but does affect the behavior of short-range coupled systems, giving rise to different thermal power-law contributions. The possibility of a universal description of the Dirac materials based on these features is also mentioned.
description: 19 pages and 12 Figures; Contains 6 Appendices
Automated Cinematography with Unmanned Aerial Vehicles
Creators: name: Galvane, Quentin
name: Fleureau, Julien
name: Tariolle, Francois-Louis
name: Guillotel, Philippe
Publisher: name: arXiv
Year: 2017
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The rise of Unmanned Aerial Vehicles and their increasing use in the cinema industry calls for the creation of dedicated tools. Though there is a range of techniques to automatically control drones for a variety of applications, none have considered the problem of producing cinematographic camera motion in real-time for shooting purposes. In this paper we present our approach to UAV navigation for autonomous cinematography. The contributions of this research are twofold: (i) we adapt virtual camera control techniques to UAV navigation; (ii) we introduce a drone-independent platform for high-level user interactions that integrates cinematographic knowledge. The results presented in this paper demonstrate the capacities of our tool to capture live movie scenes involving one or two moving actors.
Probing the dynamics of dark energy with novel parametrizations
Creators: name: Ma, Jing-Zhe
name: Zhang, Xin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We point out that the CPL parametrization has a problem that the equation of state $w(z)$ diverges in the far future, so that this model can only properly describe the past evolution but cannot depict the future evolution. To overcome such a difficulty, in this Letter we propose two novel parametrizations for dark energy, the logarithm form $w(z)=w_0+w_1({\ln (2+z)\over 1+z}-\ln2)$ and the oscillating form $w(z)=w_0+w_1({\sin(1+z)\over 1+z}-\sin(1))$, successfully avoiding the future divergency problem in the CPL parametrization, and use them to probe the dynamics of dark energy in the whole evolutionary history. Our divergency-free parametrizations are proven to be very successful in exploring the dynamical evolution of dark energy and have powerful prediction capability for the ultimate fate of the universe. Constraining the CPL model and the new models with the current observational data, we show that the new models are more favored. The features and the predictions for the future evolution in the new models are discussed in detail.
description: 6 pages, 2 figures; PLB in press
Relationship between Intensity of White-Light Flares and Proton Flux of Solar Energetic Particles
Creators: name: Huang, Nengyi
name: Xu, Yan
name: Wang, Haimin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Solar energetic particles (SEPs), including protons and heavy ions, are believed to be accelerated either by CME shock or by magnetic reconnection. The latter also produces solar flares, in which the white light flares (WLFs) are among the most energetic ones. Magnetic reconnections occur in the corona and the accelerated particles propagate both downward and upward along the magnetic loops. The former is the source of flare emission and the latter is thought to be SEPs. Therefore, a comparison between flare emission and SEP events provides valuable constraint in determining the acceleration site of SEPs. We collect 43 SEP events, observed from 2010 to 2017, and investigate their correlation with WL emission and SXR flus, observed by SDO/HMI and GOES, respectively. Our preliminary results show: 1) Among 47 SEP events, 39 of which do not have detectable flare emissions in white light and SXR. 2) Most strong WLFs are not associated with SEPs. 3) No clear correlation is found between the proton flux and the equivalent area, a quantity that measures the magnitude of WLF emission. A straightforward speculation is that the acceleration process could be different for SEPs and the energetic electrons powering WLFs in the events analyzed.
description: 1 figure, Research Note
Surfaces of revolution with prescribed mean and skew curvatures in Lorentz-Minkowski space
Creators: name: da Silva, Luiz C. B.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53A10, 53A55, 53B30

description: In this work, we investigate the problem of finding surfaces in the Lorentz-Minkowski 3-space with prescribed skew ($S$) and mean ($H$) curvatures, which are defined through the discriminant of the characteristic polynomial of the shape operator and its trace, respectively. After showing that $H$ and $S$ can be interpreted in terms of the expected value and standard deviation of the normal curvature seen as a random variable, we address the problem of prescribed curvatures for surfaces of revolution. For surfaces with a non-lightlike axis and prescribed $H$, the strategy consists in rewriting the equation for $H$, which is initially a nonlinear second order Ordinary Differential Equation (ODE), as a linear first order ODE with coefficients in a certain ring of hypercomplex numbers along the generating curves: complex numbers for curves on a spacelike plane and Lorentz numbers for curves on a timelike plane. We also solve the problem for surfaces of revolution with a lightlike axis by using a certain ODE with real coefficients. On the other hand, for the skew curvature problem, we rewrite the equation for $S$, which is initially a nonlinear second order ODE, as a linear first order ODE with real coefficients. In all the problems, we are able to find the parameterization for the generating curves in terms of certain integrals of $H$ and $S$.
description: 25 pages (23 in the published version), 4 figures. Key-words: Lorentz-Minkowski space, surface of revolution, skew curvature, mean curvature, Lorentz number
Subnatural linewidth using electromagnetically induced transparency in Doppler-broadened vapor
Creators: name: Iftiquar, S. M.
name: Karve, G. R.
name: Natarajan, Vasant
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We obtain subnatural linewidth (i.e. $ Γ$. We observe linewidths as small as $Γ/7$ in the $D_2$ line of Rb.
description: 6 pages, 7 figures
Chemotactic drift speed for bacterial motility pattern with two alternating turning events
Creators: name: Pankratova, E. V.
name: Kalyakulina, A. I.
name: Krivonosov, M. I.
name: Denisov, S.
name: Taute, K. M.
name: Zaburdaev, V. Yu.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Bacterial chemotaxis is one of the most extensively studied adaptive responses in cells. Many bacteria are able to bias their apparently random motion to produce a drift in the direction of the increasing chemoattractant concentration. It has been recognized that the particular motility pattern employed by moving bacteria has a direct impact on the efficiency of chemotaxis. The linear theory of chemotaxis pioneered by de Gennes allows for calculation of the drift velocity in small gradients for bacteria with basic motility patterns. However, recent experimental data on several bacterial species highlighted the motility pattern where the almost straight runs of cells are interspersed with turning events leading to the reorientation of the cell swimming directions with two distinct angles following in strictly alternating order. In this manuscript we generalize the linear theory of chemotaxis to calculate the chemotactic drift speed for the motility pattern of bacteria with two turning angles. By using the experimental data on motility parameters of {\em V. alginolyticus } bacteria we can use our theory to relate the efficiency of chemotaxis and the size of bacterial cell body. The results of this work can have a straightforward extension to address most general motility patterns with alternating angles, speeds and durations of runs.
Development of Potential Woven Fabric Designs with Existing Loom-Set up
Creators: name: Seboka, Neway
Publisher: name: Abyssinia Journal of Engineering and Computing
Year: 2021

description: Weaving factories in Ethiopia are sticking to limited types of product categories. It is analyzed that production of bed-sheeting and sheeting material covers more than 50% of the total product varieties. Besides, production of shirting, blankets & suiting in total covers only about 40%. Due to this, demands for basic product categories of shirting, suiting, dress materials, curtains and towels are not fulfilled with local factories product mix. Thus, the country is forced to import such products from different countries like: China, Italy, Turkey, India, Netherlands, United States, Taiwan, etc. for assessing the majorly imported product mix, three month import data has been taken from Ethiopian customs revenue authority and analyzed that for this 3-month period, a total cost of USD 566,329 has been withdrawn for purchasing the products. So, this paper tries to assess the machinery and loom conditions of the selected representative factories with main parameters of shedding mechanisms, make & model of the looms and active/working number of harness frames. Shedding contributes about 50%, 40% & 10% for tappet, dobby and jacquard mechanisms respectively & the number of harness frames in the looms ranges from 6 to 20 for both tappet and dobby looms respectively. Accordingly, with this machine set-up the potential woven fabric designs, which have application areas of shirting, dresses, suiting, towels & home furnishings have been studied in detail and more than 15 product designs have been suggested with details of required heald shafts, drafting procedures, lifting plans and specific application areas.
description: Abyssinia Journal of Engineering and Computing, Vol. 1 No. 2 (2021)
A newspaper report discussing the potential of the mosquito to transmit Coronavirus disease (COVID-19)
Creators: name: Chakrovorty, Arnob
name: Brahma, Goutam
Publisher: name: figshare
Year: 2021
Subjects: subject: Parasitology
subject: 110803 Medical Parasitology
subject: FOS: Health sciences
subject: 60808 Invertebrate Biology
subject: FOS: Biological sciences
subject: Zoology

description: A newspaper report covering Arnob Chakrovorty's bite on facts-based discussion supporting World Health Organisation's claim that the Coronavirus disease (COVID-19) caused by SARS-CoV-2 cannot be transmitted by the mosquitoes. Published in Sangbad Pratidin Newspaper (Bengali): issue date-1/Aug/2020, pp. 1&5. Cite this article as: Chakrovorty, Arnob, and Goutam Brahma. “A Newspaper Report Discussing the Potential of the Mosquito to Transmit Coronavirus Disease (COVID-19).” Sangbad Pratidin, 1 Aug. 2020, pp. 1–5. https://epaper.sangbadpratidin.in/epaper/edition/2442/sangbad-pratidin-01-08-20
Ipsilateral motor cortex activity during unimanual hand movements relates to task complexity.
Creators: name: Verstynen, Timothy
name: Diedrichsen, Jörn
name: Albert, Neil
name: Aparicio, Paul
name: Ivry, Richard B.
Publisher: name: Carnegie Mellon University
Year: 2005
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Functional imaging studies have revealed recruitment of ipsilateral motor areas during the production of sequential unimanual finger movements. This phenomenon is more prominent in the left hemisphere during left-hand movements than in the right hemisphere during right-hand movements. Here we investigate whether this lateralization pattern is related specifically to the sequential structure of the unimanual action or generalizes to other complex movements. Using event-related fMRI, we measured activation changes in the motor cortex during three types of unimanual movements: repetitions of a sequence of movements with multiple fingers, repetitive "chords" composed of three simultaneous key presses, and simple repetitive tapping movements with a single finger. During sequence and chord movements, strong ipsilateral activation was observed and was especially pronounced in the left hemisphere during left-hand movements. This pattern was evident for both right-handed and, to a lesser degree, left-handed individuals. Ipsilateral activation was less pronounced in the tapping condition. The site of ipsilateral activation was shifted laterally, ventrally, and anteriorly with respect to that observed during contralateral movements and the time course of activation implied a role in the execution rather than planning of the movement. A control experiment revealed that strong ipsilateral activity in left motor cortex is specific to complex movements and does not depend on the number of required muscles. These findings indicate a prominent role of left hemisphere in the execution of complex movements independent of the sequential nature of the task.
Singularities of Type-Q ABS Equations
Creators: name: Atkinson, James
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The type-Q equations lie on the top level of the hierarchy introduced by Adler, Bobenko and Suris (ABS) in their classification of discrete counterparts of KdV-type integrable partial differential equations. We ask what singularities are possible in the solutions of these equations, and examine the relationship between the singularities and the principal integrability feature of multidimensional consistency. These questions are considered in the global setting and therefore extend previous considerations of singularities which have been local. What emerges are some simple geometric criteria that determine the allowed singularities, and the interesting discovery that generically the presence of singularities leads to a breakdown in the global consistency of such systems despite their local consistency property. This failure to be globally consistent is quantified by introducing a natural notion of monodromy for isolated singularities.
description: contribution to the SIDE-9 special issue of SIGMA
Cissidium waginicum Darby 2020, sp. nov.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Cissidium
Cissidium waginicum

description: Cissidium waginicum sp. nov.
urn:lsid:zoobank.org:act: 6DA410C3-BFCB-4D21-99B4-3CDC3D8B255E
Fig. 114
Etymology
Johnson ms name, after Wagina Island, where the specimen was collected.
Material examined
Holotype SOLOMON ISLANDS • ♀; Choiseul, Wagina Is.; 25 May 1966; no. 23078; P. Greenslade leg.; BMNH.
Description
SIZE. Habitus (Fig. 114A), length 0.71 mm.
COLOUR. Yellow brown, pubescence antennae and legs dusky yellow.
HEAD. Width across eyes 0.22 mm; antennomeres III–XI length 0.38 mm, III–IX length 0.21 mm, X–XI length 0.17 mm.
PRONOTUM. 0.18 mm long, 0.31 mm wide; sparsely covered with large, shallow and irregular foveolae, base with a series of four foveae on each side, the two series separated by a distinct space opposite scutellum; lateral margins sharply angled, thence narrowed in a weakly concave line to somewhat effaced but obtusely angled front angles visible in dorsal view, rearwards concave to slightly acute hind angles; sides conspicuously bordered, the border continued along the entire length of the posterior margin, median emargination opposite the scutellum sinuous, barely visible (Fig. 114B).
ELYTRA. 0.60 mm long, 0.41 mm wide, basal third sparsely covered with rather large foveolae.
MESOVENTRITE. Median process of collar short, pointed; mid-keel wide, sides concave, anterior margin slightly wider than posterior which has well marked flat carinae joining the mesocoxal anterior margins, raised medially to a point before the keel; keel parallel-sided with rounded termination just past the interruption point of the mesocoxal borders; mesoventral lateral margins serrate; humeri toothed (Fig. 114C).
METAVENTRITE. Length 0.14 mm, disc simple, distance across spines 0.11 mm; posterior borders of mesocoxae serrate.
WINGS. Female apterous. Male unknown.
Remarks
Most likely to be confused with C. kolobangaricum sp. nov. in this group from the Solomon Islands, but distinguished by the wider mid-keel, and narrower pronotal base.
description: Published as part of Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, pp. 1-188 in European Journal of Taxonomy 622 on pages 181-183, DOI: 10.5852/ejt.2020.622, http://zenodo.org/record/3777282
A newspaper report discussing the potential of the mosquito to transmit Coronavirus disease (COVID-19).
Creators: name: Chakrovorty, Arnob
Publisher: name: figshare
Year: 2021
Subjects: subject: Parasitology
subject: 110803 Medical Parasitology
subject: FOS: Health sciences
subject: 60808 Invertebrate Biology
subject: FOS: Biological sciences
subject: Zoology

description: A newspaper report covering Arnob Chakrovorty's bite on facts-based discussion supporting World Health Organisation's claim that the Coronavirus disease (COVID-19) caused by SARS-CoV-2 cannot be transmitted by the mosquitoes. Published in Sangbad Pratidin Newspaper (Bengali): issue date-1/Aug/2020, pp. 1&5. Cite this article as: Chakrovorty, Arnob, and Goutam Brahma. “A Newspaper Report Discussing the Potential of the Mosquito to Transmit Coronavirus Disease (COVID-19).” Sangbad Pratidin, 1 Aug. 2020, pp. 1–5. https://epaper.sangbadpratidin.in/epaper/edition/2442/sangbad-pratidin-01-08-20
Secure Communication over 1-2-1 Networks
Creators: name: Agarwal, Gaurav Kumar
name: Ezzeldin, Yahya H.
name: Cardone, Martina
name: Fragouli, Christina
Publisher: name: arXiv
Year: 2018
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper starts by assuming a 1-2-1 network, the abstracted noiseless model of mmWave networks that was shown to closely approximate the Gaussian capacity in [1], and studies secure communication. First, the secure capacity is derived for 1-2-1 networks where a source is connected to a destination through a network of unit capacity links. Then, lower and upper bounds on the secure capacity are derived for the case when source and destination have more than one beam, which allow them to transmit and receive in multiple directions at a time. Finally, secure capacity results are presented for diamond 1-2-1 networks when edges have different capacities.
description: Submitted for ISIT 2018
A newspaper article on the possibilities of the Desert Locust (Schistocerca gregaria) swarm entering West Bengal, India
Creators: name: Chakrovorty, Arnob
name: Brahma, Goutam
Publisher: name: figshare
Year: 2021
Subjects: subject: 60808 Invertebrate Biology
subject: FOS: Biological sciences
subject: Zoology
subject: 60299 Ecology not elsewhere classified

description: Sangbad Pratidin newspaper published Arnob Chakrovorty's bite on the Locust plague in India, discussing its status and probable routes of migration and its impact on agriculture. Published in Sangbad Pratidin Newspaper (Bengali) issue date - 26/May/2020, pp. 1&5. Cite this article as: Chakrovorty, Arnob, and Goutam Brahma. “Possibilities of the migratory Dessert Locust (Schistocerca gregaria) swarm entering West Bengal, India.” Sangbad Pratidin, 26 May. 2020, pp. 1–5. https://epaper.sangbadpratidin.in/epaper/edition/2371/sangbad-pratidin-26-05-20
Kinematic Density Waves in Accretion Disks
Creators: name: Tassev, Svetlin
name: Bertschinger, Edmund
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: When thin accretion disks around black holes are perturbed, the main restoring force is gravity. If gas pressure, magnetic stresses, and radiation pressure are neglected, the disk remains thin as long as orbits do not intersect. Intersections would result in pressure forces which limit the growth of perturbations. We find that a discrete set of perturbations is possible for which orbits remain non-intersecting for arbitrarily long times. These modes define a discrete set of frequencies. We classify all long-lived perturbations for arbitrary potentials and show how their mode frequencies are related to pattern speeds computed from the azimuthal and epicyclic frequencies. We show that modes are concentrated near radii where the pattern speed has vanishing radial derivative. We explore these modes around Kerr black holes as a possible explanation for the high-frequency quasi-periodic oscillations of black hole binaries such as GRO J1655-40. The long-lived modes are shown to coincide with diskoseismic waves in the limit of small sound speed. While the waves have long lifetime, they have the wrong frequencies to explain the pairs of high-frequency quasi-periodic oscillations observed in black hole binaries.
description: 28 pages, 6 figures; extended comparison with diskoseismology; added reference to astro-ph/0603687
A newspaper article on the possibilities of the Desert Locust (Schistocerca gregaria) swarm entering West Bengal, India.
Creators: name: Chakrovorty, Arnob
Publisher: name: figshare
Year: 2021
Subjects: subject: 60808 Invertebrate Biology
subject: FOS: Biological sciences
subject: Zoology
subject: 60299 Ecology not elsewhere classified

description: Sangbad Pratidin newspaper published Arnob Chakrovorty's bite on the Locust plague in India, discussing its status and probable routes of migration and its impact on agriculture. Published in Sangbad Pratidin Newspaper (Bengali) issue date - 26/May/2020, pp. 1&5. Cite this article as: Chakrovorty, Arnob, and Goutam Brahma. “Possibilities of the migratory Dessert Locust (Schistocerca gregaria) swarm entering West Bengal, India.” Sangbad Pratidin, 26 May. 2020, pp. 1–5. https://epaper.sangbadpratidin.in/epaper/edition/2371/sangbad-pratidin-26-05-20
Correlation between quantum entanglement and quantum coherence in the case of XY spin chains with the Dzyaloshinskii-Moriya interaction
Creators: name: Gombar, Sonja
name: Mali, Petar
name: Pantic, Milan
name: Hrvojevic, Milica Pavkov
name: Radosevic, Slobodan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, there has been an increased interest in studying quantum entanglement and quantum coherence. Since both of these properties are attributed to the existence of quantum superposition, it would be useful to determine if some type of correlation between them exists. Hence, the purpose of this paper is to explore the type of the correlation in several systems with different types of anisotropy. The focus will be on the XY spin chains with the Dzyaloshinskii-Moriya interaction and the type of the mentioned bond will be explored using the quantum renormalization group method.
description: 11 pages, 4 figures
Quantitative modeling of \textit{in situ} x-ray reflectivity during organic molecule thin film growth
Creators: name: Woll, Arthur R.
name: Desai, Tushar V.
name: Engstrom, James R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Synchrotron-based x-ray reflectivity is increasingly employed as an \textit{in situ} probe of surface morphology during thin film growth, but complete interpretation of the results requires modeling the growth process. Many models have been developed and employed for this purpose, yet no detailed, comparative studies of their scope and accuracy exists in the literature. Using experimental data obtained from hyperthermal deposition of pentane and diindenoperylene (DIP) on SiO$_2$, we compare and contrast three such models, both with each other and with detailed characterization of the surface morphology using ex-situ atomic force microscopy (AFM). These two systems each exhibit particular phenomena of broader interest: pentacene/SiO$_2$ exhibits a rapid transition from rough to smooth growth. DIP/SiO$_2$, under the conditions employed here, exhibits growth rate acceleration due to a different sticking probability between the substrate and film. In general, \textit{independent of which model is used}, we find good agreement between the surface morphology obtained from fits to the \insitu x-ray data with the actual morphology at early times. This agreement deteriorates at later time, once the root-mean squared (rms) film roughness exceeds about 1 ML. A second observation is that, because layer coverages are under-determined by the evolution of a single point on the reflectivity curve, we find that the best fits to reflectivity data --- corresponding to the lowest values of $χ_ν^2$ --- do not necessarily yield the best agreement between simulated and measured surface morphologies. Instead, it appears critical that the model reproduce all local extrema in the data. In addition to showing that layer morphologies can be extracted from a minimal set of data, the methodology established here provides a basis for improving models of multilayer growth by comparison to real systems.
description: 34 pages (double-spaced, including figures and references), 10 figures, 3 appendices
CUSBoost: Cluster-based Under-sampling with Boosting for Imbalanced Classification
Creators: name: Rayhan, Farshid
name: Ahmed, Sajid
name: Mahbub, Asif
name: Jani, Md. Rafsan
name: Shatabda, Swakkhar
name: Farid, Dewan Md.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Class imbalance classification is a challenging research problem in data mining and machine learning, as most of the real-life datasets are often imbalanced in nature. Existing learning algorithms maximise the classification accuracy by correctly classifying the majority class, but misclassify the minority class. However, the minority class instances are representing the concept with greater interest than the majority class instances in real-life applications. Recently, several techniques based on sampling methods (under-sampling of the majority class and over-sampling the minority class), cost-sensitive learning methods, and ensemble learning have been used in the literature for classifying imbalanced datasets. In this paper, we introduce a new clustering-based under-sampling approach with boosting (AdaBoost) algorithm, called CUSBoost, for effective imbalanced classification. The proposed algorithm provides an alternative to RUSBoost (random under-sampling with AdaBoost) and SMOTEBoost (synthetic minority over-sampling with AdaBoost) algorithms. We evaluated the performance of CUSBoost algorithm with the state-of-the-art methods based on ensemble learning like AdaBoost, RUSBoost, SMOTEBoost on 13 imbalance binary and multi-class datasets with various imbalance ratios. The experimental results show that the CUSBoost is a promising and effective approach for dealing with highly imbalanced datasets.
description: CSITSS-2017
title: Hypertrophic pachymeningitis with Takayasu’s arteritis in young female with isolated lateral rectus palsy
Creators: name: Aggarwal, Nidhi
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Paediatric radiology
subject: Arteries / Aorta
subject: CNS
subject: Head and neck
subject: Paediatric
subject: Vascular
subject: CT-Angiography
subject: MR
subject: Contrast agent-intravenous
subject: Infection
subject: Inflammation
subject: Clinical Case

description: Clinical History: A 13-year-old female child presented to our hospital with headache for 5–6 months with recent onset vomiting, neck pain, right-sided deviation of eyes and double vision in the right eye for 8–10 days. On examination, blood pressure was normal on the right and unrecordable on the left. Ophthalmologic review suggested isolated right lateral rectus palsy without papilledema. Routine investigations and CSF were within normal limits. Autoimmune markers showed normal ACE, weakly positive ANCA (1:100) and borderline Anti-MI 2 antibodies.

description: 13 years, female
An adjoint method for gradient-based optimization of stellarator coil shapes
Creators: name: Paul, E. J.
name: Landreman, M.
name: Bader, A.
name: Dorland, W.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present a method for stellarator coil design via gradient-based optimization of the coil-winding surface. The REGCOIL (Landreman 2017 Nucl. Fusion 57 046003) approach is used to obtain the coil shapes on the winding surface using a continuous current potential. We apply the adjoint method to calculate derivatives of the objective function, allowing for efficient computation of analytic gradients while eliminating the numerical noise of approximate derivatives. We are able to improve engineering properties of the coils by targeting the root-mean-squared current density in the objective function. We obtain winding surfaces for W7-X and HSX which simultaneously decrease the normal magnetic field on the plasma surface and increase the surface-averaged distance between the coils and the plasma in comparison with the actual winding surfaces. The coils computed on the optimized surfaces feature a smaller toroidal extent and curvature and increased inter-coil spacing. A technique for visualization of the sensitivity of figures of merit to normal surface displacement of the winding surface is presented, with potential applications for understanding engineering tolerances.
description: Submitted to Nuclear Fusion
Photon statistics from a resonantly driven quantum dot
Creators: name: Nazir, Ahsan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Photon correlations in the emission of a resonantly driven quantum dot are investigated, accounting for the influence of the solid-state phonon environment. An analytical expression is derived for the second-order fluorescence intensity correlation function, from which regimes of correlated and uncorrelated photon emission are predicted as the driving field is varied. Experiments to investigate this effect would provide valuable insight into quantum dot carrier-phonon dynamics and are feasible with current technology.
description: 5 pages, 3 figures, published version
A newspaper article on the sudden occurrence of Aularches miliaris (coffee locust) swarms at Jhargram, West Bengal, India.
Creators: name: Chakrovorty, Arnob
Publisher: name: figshare
Year: 2021
Subjects: subject: 70205 Animal Protection (Pests and Pathogens)
subject: FOS: Animal and dairy science
subject: 70308 Crop and Pasture Protection (Pests, Diseases and Weeds)
subject: FOS: Agriculture, forestry and fisheries
subject: 70106 Farm Management, Rural Management and Agribusiness
subject: FOS: Other agricultural sciences
subject: 70504 Forestry Management and Environment
subject: 60202 Community Ecology (excl. Invasive Species Ecology)
subject: FOS: Biological sciences
subject: 70505 Forestry Pests, Health and Diseases
subject: 70603 Horticultural Crop Protection (Pests, Diseases and Weeds)

description: The newspaper article covers Arnob Chakrovorty's bite on the sudden occurrence of Aularches miliaris (coffee locust) swarm at Jhargram, West Bengal, India, and a confirmatory record of the species of locust being documented. This report was aimed to appease the public that the documented species was not the plague-causing desert locust ( Schistocerca gregaria) responsible for the locust plague of 2020 in India. Published in Sangbad Pratidin Newspaper (Bengali) issue date-3June2020, pp. 1&5 Cite this article as: Chakrovorty, Arnob, and Goutam Brahma. “A newspaper article on the sudden occurrence of Aularches miliaris (coffee locust) swarms at Jhargram, West Bengal, India..” Sangbad Pratidin, 3 Jun. 2020, pp. 1–5. https://epaper.sangbadpratidin.in/epaper/edition/2380/sangbad-pratidin-03-06-20
BioExcel Deliverable D3.5 – Consultancy Modalities and Funding Options, Final Update
Creators: name: Carter, Adam
name: Harrow, Ian
name: Apostolov, Rossen
name: Bonvin, Alexandre
name: Matser, Vera
name: Gapsys, Vytautas
name: Ippoliti, Emiliano
name: Melqiond, Adrien
name: Noack, Holger
name: Soiland-Reyes, Stian
name: Trellet, Mikael
Publisher: name: Zenodo
Year: 2019

description: This document follows on from D3.3 “Consultancy Modalities and Funding Options, Half- Time Update”. It is intended to be read in conjunction with D3.3, as it does not aim to repeat the content therein. The structure of the documents is similar, to allow cross- referencing. It aims to relate the more theoretical list of modalities presented in D3.3 with specific activities undertaken in the project. BioExcel has used several modalities in activities aimed at the wider community including web pages, a discussion/feedback forum, workflow portals of different types (including software-as-a-service, and those providing access to workflow components), white papers, webinars, face-to-face meetings of various kinds (including Interest Group meetings, workshops, a community forum meeting and multiple face-to-face training courses), online meetings and calls. Fewer of the modalities categorised as being important for professional products and services have been evaluated in BioExcel-1, as they are particularly difficult to offer successfully with a relatively small pool of experts. One modality however, bespoke training, has been piloted with an industry customer and deemed to be very successful. The modalities described above were complemented by informal discussions at meetings and other academic interactions of the partners. Project partner UU also took part in the D3R challenge, raising their profile and that of the Centre of Excellence (CoE). The modalities that have been used successfully in BioExcel-1 will be built on through the addition of several other modalities in BioExcel-2, which includes tasks focused on use cases, community participation, in-depth support, work on standards and best practice, and more. BioExcel has explored a range of modalities during its work with the user community. Learning from BioExcel-1, BioExcel-2 plans to continue the most successful activities, and adopt several new modalities in order to continue its work to engage with the community. The CoE is clearly moving towards a second phase: In BioExcel-1 relationships have been established, and groundwork laid. In BioExcel-2 we will build on this to engage more deeply with the community. A key lesson from BioExcel-1 has been the value of using multiple modalities to work with a given individual, organisation or group. There are certainly different modalities that work better with different groups, but probably more important is having the flexibility to combine these in ways which fit with the work that is being undertaken over a period of time. In BioExcel-2 we have sought to continue this process by placing a greater emphasis on a support team that can balance its time between engagement events and more specific support in response to user need.
Investigation of goal change to optimize upper-extremity motor performance in a robotic environment
Creators: name: Brewer, Bambi R.
name: Klatzky, Roberta
name: Markham, Heather
name: Yoky  Matsuoka
Publisher: name: Carnegie Mellon University
Year: 2009
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Robotic devices for therapy have the potential to enable intensive, fully customized home rehabilitation over extended periods for individuals with stroke and traumatic brain injury, thus empowering them to maximize their functional recovery. For robotic rehabilitation to be most effective, systems must have the capacity to assign performance goals to the user and to increment those goals to encourage performance improvement. Otherwise, individuals may plateau at an artificially low level of function. Frequent goal change is needed to motivate improvements in performance by individuals with brain injury; but because of entrenched habits, these individuals may avoid striving for goals that they perceive as becoming ever more difficult. For this reason, implicit, undetectable goal change (distortion) may be more effective than explicit goal change at optimizing the motor performance of some individuals with brain injury. This paper reviews a body of work that provides a basis for incorporating implicit goal change into a robotic rehabilitation paradigm. This work was conducted with individuals without disability to provide foundational knowledge for using goal change in a robotic environment. In addition, we compare motor performance with goal change to performance with no goal or with a static goal for individuals without brain injury. Our results show that goal change can improve motor performance when participants attend to visual feedback. Building on these preliminary results can lead to more effective robotic paradigms for the rehabilitation of individuals with brain injury, including individuals with cerebral palsy.
A newspaper article on the sudden occurrence of Aularches miliaris (coffee locust) swarms at Jhargram, West Bengal, India
Creators: name: Chakrovorty, Arnob
name: Brahma, Goutam
Publisher: name: figshare
Year: 2021
Subjects: subject: 70205 Animal Protection (Pests and Pathogens)
subject: FOS: Animal and dairy science
subject: 70308 Crop and Pasture Protection (Pests, Diseases and Weeds)
subject: FOS: Agriculture, forestry and fisheries
subject: 70106 Farm Management, Rural Management and Agribusiness
subject: FOS: Other agricultural sciences
subject: 70504 Forestry Management and Environment
subject: 60202 Community Ecology (excl. Invasive Species Ecology)
subject: FOS: Biological sciences
subject: 70505 Forestry Pests, Health and Diseases
subject: 70603 Horticultural Crop Protection (Pests, Diseases and Weeds)

description: The newspaper article covers Arnob Chakrovorty's bite on the sudden occurrence of Aularches miliaris (coffee locust) swarm at Jhargram, West Bengal, India, and a confirmatory record of the species of locust being documented. This report was aimed to appease the public that the documented species was not the plague-causing desert locust ( Schistocerca gregaria) responsible for the locust plague of 2020 in India. Published in Sangbad Pratidin Newspaper (Bengali) issue date-3June2020, pp. 1&5 Cite this article as: Chakrovorty, Arnob, and Goutam Brahma. “A newspaper article on the sudden occurrence of Aularches miliaris (coffee locust) swarms at Jhargram, West Bengal, India..” Sangbad Pratidin, 3 Jun. 2020, pp. 1–5. https://epaper.sangbadpratidin.in/epaper/edition/2380/sangbad-pratidin-03-06-20
Measurement Bounds for Sparse Signal Ensembles via Graphical Models
Creators: name: Duarte, Marco F.
name: Wakin, Michael B.
name: Baron, Dror
name: Sarvotham, Shriram
name: Baraniuk, Richard G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In compressive sensing, a small collection of linear projections of a sparse signal contains enough information to permit signal recovery. Distributed compressive sensing (DCS) extends this framework by defining ensemble sparsity models, allowing a correlated ensemble of sparse signals to be jointly recovered from a collection of separately acquired compressive measurements. In this paper, we introduce a framework for modeling sparse signal ensembles that quantifies the intra- and inter-signal dependencies within and among the signals. This framework is based on a novel bipartite graph representation that links the sparse signal coefficients with the measurements obtained for each signal. Using our framework, we provide fundamental bounds on the number of noiseless measurements that each sensor must collect to ensure that the signals are jointly recoverable.
description: 11 pages, 2 figures
Investigating the Mechanisms of Learning fr om a Constrained Preparation for Future Learning Activity
Creators: name: Siler, Stephanie
name: Klahr, David
name: Price, Norman
Publisher: name: Carnegie Mellon University
Year: 2013
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Many studies have shown benefits associated with engaging students in problem-solving activities prior to administering lessons. These problem-solving activities are assumed to activate relevant knowledge and allow students to develop some initial knowledge structures, which support understanding of the lesson. In this paper we report the results of two studies in which we investigated the underlying benefits of engaging in a preparatory activity—setting up experiments without running them or receiving feedback—prior to an interactive computerized lesson on experimental design compared to only engaging in the interactive lesson. We predicted that the seventh-grade participants who demonstrated some initial knowledge of the topic—experimental design—would benefit more from spending the whole time engaged in instructional activities. However, we expected students who did not demonstrate initial knowledge would benefit more from engaging in the preparatory activity, which would allow them to activate or develop initial knowledge that would aid their understanding of the subsequent instruction. The predicted condition by initial knowledge interaction was found in both studies. In Study 1, the benefit of only engaging in the instruction was found only for the lowest-knowledge of students who demonstrated initial knowledge. For students who did not demonstrate some initial knowledge, the benefit of completing the preparatory activity appeared to be due to the development of an understanding of the general goal of the activity rather than of specific knowledge of experimental design. Based on this finding, in Study 2, we investigated an initial goal by condition interaction. In fact, students who did not express an understanding of the task goal on the pretest benefited from engaging in the preparatory activity and students who did benefited more from the instruction. Again, this benefit appeared to be due to students’ development of an appropriate understanding of the task goal during the preparatory activity.
High-precision measurement of hyperfine structure in the $D$ lines of alkali atoms
Creators: name: Das, Dipankar
name: Natarajan, Vasant
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We have measured hyperfine structure in the first-excited $P$ state ($D$ lines) of all the naturally-occurring alkali atoms. We use high-resolution laser spectroscopy to resolve hyperfine transitions, and measure intervals by locking the frequency shift produced by an acousto-optic modulator to the difference between two transitions. In most cases, the hyperfine coupling constants derived from our measurements improve previous values significantly.
description: 24 pages, 13 figures, accepted in Journal of Physics B: Atomic, Molecular and Optical Physics