cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Preparation of a dicationic, p-cymene ruthenium(II) dimer, [(p-cymene)Ru(µ-Cl)(P{OCH2}3CEt)]22+: structure, characterization and reactivity
Creators: name: Bazemore, Joseph G.
name: Padgett, Clifford W.
name: Quillian, Brandon
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Plant Biology

description: Reaction of (p-cymene)RuCl2(P{OCH2}3CEt) (P{OCH2}3CEt = 4-ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane) with silver tetrakis[(3,5-trifluoromethyl)phenyl]borate (Ag[BArF′]) in the presence of acetonitrile produces the monomeric, cationic, acetonitrile ruthenium(II) compound, [(p-cymene)RuCl(P{OCH2}3CEt)(NCMe)][BArF′] (1), in near quantitative yields (97%). Chloroform solutions of 1 cause precipitation of the binuclear, dicationic ruthenium(II) dimer complex, [(p-cymene)Ru(µ-Cl(P{OCH2}3CEt)]2[BArF′]2 (2), with bridging chloride ligands (73%). Complex 2 can be readily converted back to 1 by treatment with acetonitrile. Complexes 1 and 2 were characterized by 1H, 13C{1H}, 31P{1H}, 19F{1H} nuclear magnetic resonance spectroscopy and infrared spectroscopy. Complex 2 was also characterized by single crystal X-ray crystallography, which revealed a rhomboid Ru2Cl2 core. The two ruthenium ions in 2 are displaced at 3.668 Å, which precludes Ru–Ru bonding. To our knowledge, this is the first cymene ruthenium(II) dimeric complex with bridging halide ligands supported by a monodentate phosphite ligand.
Spotlight report big data and work 2.0
Creators: name: Kilhoffer, Z.
Publisher: name: Zenodo
Year: 2021

description: In recent years, big data has become a transformative tool for labour research. Big data can supplement official data sources like labour force surveys, which often fail to adequately represent vulnerable people. This report builds on desk research and two workshops (Special Interest Groups) to discuss the opportunities and challenges of applying big data in labour studies. Big data is more granular and timelier than traditional data sources, and researchers continue to discover new data sources and ways to use them. Novel studies use big data to research migration and non-standard employment, explore labour market supply and demand with online job advertisements, and audit online advertisements for potential discrimination against protected groups. Despite its potential, big data presents theoretical, methodological, and practical challenges for researchers. Many challenges relate to non-probability sampling techniques, which require special attention to correct for biases. Big data can be very noisy, difficult to obtain, and problematic for data privacy. Labour researchers ought to leverage big data and remain aware of its limitations. This requires careful selection and consideration of data sources, and investment in requisite skills and technology.
title: Worte der Erinnerung an Herrn Dr. Franz Fäh-Kinkelin, Schulinspektor
title: Gewidmet von einigen Freunden
titleType: Subtitle
Creators: name: Altherr, Alfred
name: Küpfer, Fritz
name: Merk, K.
Publisher: name: Buchdruckerei G. Krebs
Year: 1907
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Fäh, Franz

description: Enthält: Personalien, gesprochen von Herrn Pfarrer Altherr in der Pauluskirche, 13. Mai 1907; Ansprache, gehalten von Herrn Pfarrer Altherr in der Pauluskirche; Am Grabe. Rede von Herrn Primarlehrer Fritz Küpfer; Nachruf in der "Schweizerischen Lehrer-Zeitung" von Herrn Rektor K. Merk; Nachruf in den "Basler Nachrichten" von Herrn Schulinspektor Tuchschmid
Pathfinding and Localization in AR from Floor Plan Data
Creators: name: Gini, Tamara
Publisher: name: ETH Zurich
Year: 2023

description: Adopting Augmented Reality (AR) content in museums is an opportunity to enhance visitor experiences. By also incorporating navigation information into AR applications, we can further improve the user experience. Navigation in indoor environments is a feature many mobile apps would like to offer. However, due to the lack of reliable GPS data, indoor localization remains a challenge. Many existing solutions rely on dense deployments of Bluetooth beacons, which can be costly. In this thesis, we focus on a method to estimate positions that does not require any additional hardware, apart from the user’s phone. Our indoor user localization algorithm utilizes data from the accelerometer, the gyroscope, and AR tracking. We use the resulting position estimate in conjunction with floor plan data for navigation. 

We implemented two localization methods, namely dead reckoning and Pedestrian Dead Reckoning (PDR). We found that dead reckoning suffers from noise and sensor drift, even with calibration and Zero Velocity Potential Update (ZUPT) techniques. PDR, although more robust against noise, required users to adhere to specific constraints regarding phone handling during movement. When executed correctly, PDR demonstrated high localization accuracy, but there were substantial variations in accuracy among different individuals. 

We conducted a user study to compare three different approaches for presenting navigation information in AR. The findings indicate that a balance between clear path visualization and simple on-screen instructions is crucial.
Efficient engineering of multi-atom entanglement through single-photon detections
Creators: name: Duan, L. -M.
name: Kimble, H. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an efficient scheme to engineer multi-atom entanglement by detecting cavity decay through single-photon detectors. In the special case of two atoms, this scheme is much more efficient than previous probabilistic schemes, and insensitive to randomness in the atom's position. More generally, the scheme can be used to prepare arbitrary superpositions of multi-atom Dicke states without the requirements of high-efficiency detection and separate addressing of different atoms.
description: 5 pages, 2 figures
Exploring englacial hydrology with surface nuclear magnetic resonance
Creators: name: Gabriel, Laura
name: Hertrich, Marian
name: Moser, Raphael
name: Ogier, Christophe
name: Maurer, Hansruedi
name: Farinotti, Daniel
Publisher: name: ETH Zurich
Year: 2024

description: The amount and distribution of liquid water inside a glacier are relevant for its dynamics, related natural hazards or for sediment transport. Experimentally investigating the glacier's hydrology is challenging because of restricted accessibility, investigation depth, material properties, and environmental factors. In addition, the subglacial drainage network is highly dynamic and undergoes diurnal and seasonal changes.

This contribution investigates the application of surface nuclear magnetic resonance (SNMR) to characterize the liquid water distribution within Swiss Alpine glaciers. Analogous to magnetic resonance imaging (MRI) in medicine, SNMR utilizes an oscillating magnetic field to excite nuclear spins of hydrogen atoms within water molecules. The subsequent spin relaxation is then analyzed, providing insights into the probed material. In simpler terms, this process allows us to directly detect liquid water in ice and gain information on its spatial distribution.

We conducted a first SNMR field survey on Rhonegletscher in the summer of 2023. During this survey, we tested various measurement configurations, including separate-loop measurements and the application of noise-compensation loops. The latter proved crucial for subsequent data processing. After carefully optimizing the processing scheme, we extracted SNMR signals in several recordings despite the poor signal-to-noise ratio. The results were compared to 1D forward-modelled data, suggesting that the average water content in the survey area lay between 0.7 and 1.2 %. In addition, we could show that a homogenous water distribution over the entire ice column cannot explain the observed data and that we need to consider more complex subsurface models including at least one additional water layer. Specifically, our ongoing research aims to identify which configurations of the subglacial water distribution (e.g., homogenous water distribution vs layered water-ice structure resulting from an englacial water channel) are distinguishable experimentally. Moreover, the study seeks to optimize measurement design and data processing methodologies to acquire information more efficiently, and effectively handle the expected low signal-to-noise ratios.

In future field campaigns, we intend to deploy SNMR for selected glaciological case studies within the Swiss Alps. A primary focus will be on efficiently detecting water pockets that may pose a potential risk of downstream flooding upon rupture. Similarly, we want to investigate the extent to which we can distinguish cold from temperate ice.
description: EGUsphere
Stick-slip imaging through the GPR phase: Turning  temperate ice 'noise' into signal
Creators: name: Aichele, Johannes
name: Ogier, Christophe
name: Anhorn, Barthélémy
Publisher: name: ETH Zurich
Year: 2024

description: Ground Penetrating Radar (GPR) is a major tool to investigate, map and monitor polar ice sheets and alpine glaciers. Alpine glaciers are often composed of temperate ice, which has significantly different backscatter properties from cold ice. Radar attenuation is much stronger in temperate ice than in cold ice, because the radar signal encounters strong scattering in temperate ice. 
A major candidate for this scattering is the presence of liquid water inclusions, which are much smaller than the radar wavelength. The large contrast between water and ice dielectric permittivity would explain the diffuse radar scattering in temperate ice. Indeed, recent numerical modelling of the radar signal in temperate ice confirmed the contribution of liquid water inclusions on the scattering of the radar signal (Ogier, 2023). 
Here, we investigate if the strong scattering caused by liquid water inclusions, which is usually treated as noise, can be in fact exploited to unravel dynamic processes inside the glacier. This strong scattering results in large radar phase variations in space, which remain constant over short timescales (hours - days), during which the glacial water content remains constant. During that timescale, however, the mountain glacier might experience sudden internal deformation due to intermittent sliding at the glacier base, also called glacier stick-slip.  This deformation might be resolved using difference imaging and the spatio-temporal properties of the radar phase.
We numerically model radar wave propagation throughout temperate ice (i.e. with the presence of liquid water inclusions) before and after an idealized glacier deformation and show, that through phase difference imaging the internal movement of the sub-wavelength scatterers can be mapped. 
Finally, we discuss how this novel type of monitoring could be applied in the field, which is planned for spring 2024.
description: EGUsphere
Numerical stability of a new conformal-traceless 3+1 formulation of the Einstein equation
Creators: name: Laguna, Pablo
name: Shoemaker, Deirdre
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: There is strong evidence indicating that the particular form used to recast the Einstein equation as a 3+1 set of evolution equations has a fundamental impact on the stability properties of numerical evolutions involving black holes and/or neutron stars. Presently, the longest lived evolutions have been obtained using a parametrized hyperbolic system developed by Kidder, Scheel and Teukolsky or a conformal-traceless system introduced by Baumgarte, Shapiro, Shibata and Nakamura. We present a new conformal-traceless system. While this new system has some elements in common with the Baumgarte-Shapiro-Shibata-Nakamura system, it differs in both the type of conformal transformations and how the non-linear terms involving the extrinsic curvature are handled. We show results from 3D numerical evolutions of a single, non-rotating black hole in which we demonstrate that this new system yields a significant improvement in the life-time of the simulations.
description: 7 pages, 2 figures
Nonlocal braneworld action: an alternative to Kaluza-Klein description
Creators: name: Barvinsky, Andrei
name: Kamenshchik, Alexander
name: Rathke, Andreas
name: Kiefer, Claus
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct the nonlocal braneworld action in the two-brane Randall-Sundrum model in a holographic setup alternative to Kaluza-Klein description: the action is written as a functional of the two metric and radion fields on the branes. This action effectively describes the dynamics of the gravitational field both on the branes and in the bulk in terms of the brane geometries directly accessible for observations. Its nonlocal form factors incorporate the cumulative effect of the bulk Kaluza-Klein modes. We also consider the reduced version of this action obtained by integrating out the fields on the negative-tension brane invisible from the viewpoint of the Planckian brane observer. This effective action features a nontrivial transition (AdS flow) between the local and nonlocal phases of the theory associated with the limits of small and large interbrane separation. Our results confirm a recently proposed braneworld scenario with diverging (repulsive) branes and suggest possible new implications of this phase transition in brane cosmology.
description: 33 pages, title changed, the focus of discussion is shifted to nonlocality properties of Weyl-squared terms in braneworld action and phase transitions between local and nonlocal phases of the theory, to appear in Phys. Rev. D
Perovskite nanocrystal self-assemblies in 3D hollow templates
Creators: name: Kobiyama, Etsuki
name: Urbonas, Darius
name: Bodnarchuk, Maryna I.
name: Rainò, Gabriele
name: Olziersky, Antonis
name: Caimi, Daniele
name: Sousa, Marilyne
name: Mahrt, Rainer F.
name: Kovalenko, Maksym V.
name: Stöferle, Thilo
Publisher: name: ETH Zurich
Year: 2024
Subjects: Soft Condensed Matter (cond-mat.soft)
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Applied Physics (physics.app-ph)
Chemical Physics (physics.chem-ph)
FOS: Physical sciences

description: Highly ordered nanocrystal (NC) assemblies, namely superlattices (SLs), have been investigated as novel building blocks of optical and optoelectronic devices due to their unique properties based on interactions among neighboring NCs. In particular, lead halide perovskite NC SLs have attracted significant attention, owing to their extraordinary optical characteristics of individual NCs and collective emission processes like superfluorescence (SF). So far, the primary method for preparing perovskite NC SLs has been the drying-mediated self-assembly method, in which the colloidal NCs spontaneously assemble into SLs during solvent evaporation. However, this method lacks controllability because NCs form random-sized SLs at random positions on the substrate rendering NC assemblies in conjunction with device structures such as photonic waveguides or microcavities challenging. Here, we demonstrate template-assisted self-assembly to deterministically place perovskite NC SLs and control their geometrical properties. A solution of CsPbBr3 NCs is drop-casted on a substrate with lithographically-defined hollow structures. After solvent evaporation and removal of excess NCs from the substrate surface, NCs only remain in the templates thereby defining the position and size of these NC assemblies. We performed photoluminescence (PL) measurements on these NC assemblies and observed signatures of SF, similar as in spontaneously assembled SLs. Our findings are crucial for optical devices that harness embedded perovskite NC assemblies and prepare fundamental studies on how these collective effects can be tailored through the SL geometry.
description: arXiv
Radiative neutrino mass model from a mass dimension-11 $ΔL =2 $ effective operator
Creators: name: Gargalionis, John
name: Popa-Mateiu, Iulia
name: Volkas, Raymond R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the first detailed phenomenological analysis of a radiative Majorana neutrino mass model constructed from opening up a $ΔL = 2$ mass-dimension-11 effective operator constructed out of standard model fields. While three such operators are generated, only one dominates neutrino mass generation, namely $O_{47} = \overline{L^C} L \overline{Q^C} Q \overline{Q} Q^C H H$, where $L$ denotes lepton doublet, $Q$ quark doublet and $H$ Higgs doublet. The underlying renormalisable theory contains the scalars $S_1 \sim (\bar{3},1,1/3)$ coupling as a diquark, $S_3 \sim (\bar{3},3,1/3)$ coupling as a leptoquark, and $Φ_3 \sim (3,3,2/3)$, which has no Yukawa couplings but does couple to $S_1$ and $S_3$ in addition to the gauge fields. Neutrino masses and mixings are generated at two-loop order. A feature of this model that is different from many other radiative models is the lack of proportionality to any quark and charged-lepton masses of the neutrino mass matrix. One consequence is that the scale of new physics can be as high as $10^7$ TeV, despite the operator having a high mass dimension. This raises the prospect that $ΔL = 2$ effective operators at even higher mass dimensions may, when opened up, produce phenomenologically-viable radiative neutrino mass models. The parameter space of the model is explored through benchmark slices that are subject to experimental constraints from charged lepton flavour-violating decays, rare meson decays and neutral-meson mixing. The acceptable parameter space can accommodate the anomalies in $R_{K^{(*)}}$ and the anomalous magnetic moment of the muon.
description: 52 pages, 22 figures, 4 tables
An Economic Analysis of “Local” Production: Is it Efficient or Inefficient
Creators: name: Jones, Eugene
name: Jones, Eugene
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Food Consumption/Nutrition/Food Safety
subject: Production Economics
subject: Inefficiency
subject: Local
subject: Potatoes
subject: Production Efficiency
subject: Technical Efficiency
subject: Marketing Efficiency
subject: Pricing Efficency

description: It is well recognized that the production of many farm commodities, especially fruits and vegetables, has become geographically concentrated, with larger but fewer farmers involved in production. This concentration, according to critics, has resulted in the production of less flavorful commodities and added unnecessary costs to marketing. To address these shortcomings, several groups have advocated “local” production of farm commodities, especially fruits and vegetables. According to proponents of “locals”, such production is preferred by consumers because these commodities are fresher, more nutritious, better tasting, and grown with fewer pesticides. Further, local commodities provide income opportunities for small farmers and they serve to lower food miles and transportation costs. While acknowledging these described attributes and benefits, this paper uses a specific commodity, potatoes, to illustrate the true costs of “locals”. Results show efficiency gains from comparative advantage and other factors that far exceed the most optimistic returns to “locals”. In dollars, “local” production of potatoes would add, as a minimum, $3.8 billion of additional cost. Further, it would require an additional 961,000 acres of land. Local production costs for all commodities that make up consumers’ diets could possibly rival that of the $90 billion food stamp budget.
The Effects of Climate Changes on Brazilian Agricultural Production – A Multisector Growth Model Analysis
Creators: name: Spolador, Humberto Francisco Silva
name: Smith, Rodney B.W.
name: Spolador, Humberto Francisco Silva
name: Smith, Rodney B.W.
Publisher: name: Unknown
Year: 2014
Subjects: subject: Environmental Economics and Policy
subject: Productivity Analysis
subject: Climate Changes
subject: agricultural growth
subject: multisector growth model

description: This paper develops a multisector growth model to examine the potential effects of climate change and Brazilian agriculture. In keeping with the current literature, the model assumes climate (here temperature and rainfall) affects agricultural output via its impact on total factor productivity (TFP). We begin by estimating an aggregate agricultural technology for Brazil, with econometric results suggesting a strong relationship exists between rainfall, temperature and agricultural TFP. We then introduce the climate effects into a dynamic multisector growth model of Brazil. Model results suggest climate change could have a negative impact on agriculture, but benefit manufacturing, with long run agricultural output per unit of labor being less than half of agricultural output per worker in a no climate change world.
Systematics in the ALMA Proposal Review Rankings
Creators: name: Carpenter, John M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The results from the ALMA proposal peer review process in Cycles 0-6 are analyzed to identify any systematics in the scientific rankings that may signify bias. Proposal rankings are analyzed with respect to the experience level of a Principal Investigator (PI) in submitting ALMA proposals, regional affiliation (Chile, East Asia, Europe, North America, or Other), and gender. The analysis was conducted for both the Stage 1 rankings, which are based on the preliminary scores from the reviewers, and the Stage 2 rankings, which are based on the final scores from the reviewers after participating in a face-to-face panel discussion. Analysis of the Stage 1 results shows that PIs who submit an ALMA proposal in multiple cycles have systematically better proposal ranks than PIs who have submitted proposals for the first time. In terms of regional affiliation, PIs from Europe and North America have better Stage 1 rankings than PIs from Chile and East Asia. Consistent with Lonsdale et al. (2016), proposals led by men have better Stage 1 rankings than women when averaged over all cycles. This trend was most noticeably present in Cycle 3, but no discernible differences in the Stage 1 rankings are present in recent cycles. Nonetheless, in each cycle to date, women have had a lower proposal acceptance rate than men even after differences in demographics are considered. Comparison of the Stage 1 and Stage 2 rankings reveal no significant changes in the distribution of proposal ranks by experience level, regional affiliation, or gender as a result of the panel discussions, although the proposal ranks for East Asian PIs show a marginally significant improvement from Stage 1 to Stage 2 when averaged over all cycles. Thus any systematics in the proposal rankings are introduced primarily in the Stage 1 process and not from the face-to-face discussions.
description: 26 pages, 14 figures, accepted for publication in PASP
Intrinsic absorbers in BL Lac objects: the XMM-Newton view
Creators: name: Blustin, A. J.
name: Page, M. J.
name: Branduardi-Raymont, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present XMM-Newton observations of four BL Lac objects (1H1219+301, H1426+428, Markarian 501 and PKS 0548-322), which have been found with past X-ray missions to contain evidence of broad soft X-ray absorption features. Observations with the high resolution Reflection Grating Spectrometers on XMM-Newton provide the best chance yet of investigating these features. No broad absorption features are observed in any of the objects. Neither do we find convincing evidence for narrow emission and absorption lines in the RGS spectra. We discuss the history of observations of broad absorption features in these four objects, finding that if the features exist then they must be transient, and that - given the frequency of reported observations of them - we can rule out the existence of transient broad absorption features in these objects at 93% confidence.
description: 11 pages, 7 figures, accepted for publication in A&A
Bethe Ansatz solution of the open XX spin chain with nondiagonal boundary terms
Creators: name: Nepomechie, Rafael I.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We consider the integrable open XX quantum spin chain with nondiagonal boundary terms. We derive an exact inversion identity, using which we obtain the eigenvalues of the transfer matrix and the Bethe Ansatz equations. For generic values of the boundary parameters, the Bethe Ansatz solution is formulated in terms of Jacobian elliptic functions.
description: 14 pages, LaTeX; amssymb, no figures
title: 01_2877
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: Laboratoire de Médiévistique Occidentale de Paris
subject: LaMOP

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Some Observational Consequences of Brane World Cosmologies
Creators: name: Alcaniz, J. S.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The presence of dark energy in the Universe is inferred directly and indirectly from a large body of observational evidence. The simplest and most theoretically appealing possibility is the vacuum energy density (cosmological constant). However, although in agreement with current observations, such a possibility exacerbates the well known cosmological constant problem, requiring a natural explanation for its small, but nonzero, value. In this paper we focus our attention on another dark energy candidate, one arising from gravitational \emph{leakage} into extra dimensions. We investigate observational constraints from current measurements of angular size of high-$z$ compact radio-sources on accelerated models based on this large scale modification of gravity. The predicted age of the Universe in the context of these models is briefly discussed. We argue that future observations will enable a more accurate test of these cosmologies and, possibly, show that such models constitute a viable possibility for the dark energy problem.
description: 6 pages, 4 figures, to appear in Phys. Rev. D (minor revisions)
Dynamic effects of electromagnetic wave on a damped two-level atom
Creators: name: Zeng, Z. Y.
name: Zeng, G. J.
name: Kuang, L. M.
name: Zhang, L. D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We studied the dynamic effects of an electromagnetic(EM) wave with circular polarization on a two-level damped atom. The results demonstrate interesting ac Stark split of energy levels of damped atom. The split levels have different energies and lifetimes, both of which depend on the interaction and the damping rate of atom. When the frequency of the EM wave is tuned to satisfy the resonance condition in the strong coupling limit, the transition probability exhibits Rabi oscillation. Momentum transfer between atom and EM wave shows similar properties as the transition probability under resonance condition. For a damped atom interacting with EM field, there exists no longer stable state. More importantly, if the angular frequency of the EM wave is tuned the same as the atomic transition frequency and its amplitude is adjusted appropriately according to the damping coefficients, we can prepare a particular 'Dressed State' of the coupled system between atom and EM field and can keep the system coherently in this 'Dressed state' for a very long time. This opens another way to prepare coherent atomic states.
description: latex, 2 figures
MOESM2 of CRISPR-Cas13d mediates robust RNA virus interference in plants
Creators: name: Mahas, Ahmed
name: Aman, Rashid
name: Magdy Mahfouz
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Developmental Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: 60506 Virology
subject: Computational Biology

description: Additional file 2. Review history.
Detecting a stochastic gravitational wave background with the Laser Interferometer Space Antenna
Creators: name: Cornish, Neil J.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The random superposition of many weak sources will produce a stochastic background of gravitational waves that may dominate the response of the LISA (Laser Interferometer Space Antenna) gravitational wave observatory. Unless something can be done to distinguish between a stochastic background and detector noise, the two will combine to form an effective noise floor for the detector. Two methods have been proposed to solve this problem. The first is to cross-correlate the output of two independent interferometers. The second is an ingenious scheme for monitoring the instrument noise by operating LISA as a Sagnac interferometer. Here we derive the optimal orbital alignment for cross-correlating a pair of LISA detectors, and provide the first analytic derivation of the Sagnac sensitivity curve.
description: 9 pages, 11 figures. Significant changes to the noise estimates
High relaxivity polymeric MRI contrast agents: design, synthesis and polymerisation of Gd complexes
Creators: name: Berki, Thomas
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: We report a new synthetic strategy for the preparation of high relaxivity macromolecular MRI contrast agents. Five gadolinium(III) complex-es bearing either one or two polymerisable methacrylamide groups were designed and synthesised, serving as monomers, crosslinkers or chain transfer agent respectively, to generate water-soluble copolymers using RAFT polymerisation. Using this approach, polymeric contrast agents (CAs) were synthesised with different architectures, including linear, hyperbranched polymers and gels. The relaxivities of the polymer CAs were determined by NMR relaxometry.
An event-driven neural network for monitoring of epileptic seizures on low-power neuromorphic hardware
Creators: name: Bartels, Jim
name: Gallou, Olympia
name: Ito, Hiroyuki
name: Cook, Matthew
name: Sarnthein, Johannes
name: Indiveri, Giacomo
name: Ghosh, Saptarshi
Publisher: name: ETH Zurich
Year: 2024

description: Long-term monitoring of biomedical signals is essential for the modern clinical management of neurological conditions such as epilepsy. However, developing wearable systems, able to monitor, analyze, and detect epileptic seizures with long-lasting operation times, using current technologies is still an open challenge. Brain-inspired spiking neural networks (SNNs) represent a promising signal processing and computing framework as they can be deployed on ultra-low power neuromorphic computing systems, for this purpose. Here, we introduce a foundational SNN architecture, co-designed and validated on a mixed-signal neuromorphic chip, for always-on monitoring of epileptic activity. We demonstrate how the hardware implementation of this SNN captures the phenomenon of partial synchronization within neural activity during seizure periods. We benchmark the network using a full-custom asynchronous mixed-signal neuromorphic platform, processing analog signals in real-time from an Electroencephalographic (EEG) seizure dataset. The neuromorphic chip comprises an analog front-end (AFE) signal conditioning stage and an asynchronous delta modulation (ADM) circuit directly integrated on the same die, which can produce the stream of spikes as input to the SNN, directly from the EEG electrodes. A linear classifier in a post processing stage is sufficient to reliably classify and detect seizures, from the local features extracted by the SNN. This research marks a significant advancement toward developing embedded intelligent “wear and forget” units for resource-constrained environments. These units could autonomously detect and log relevant EEG events of interest in out-of-hospital environments, offering new possibilities for patient care and management of neurological disorders.
description: bioRxiv
Synthesis of a rod-based porous coordination polymer from a nucleotide as a sequential chiral inductor
Creators: name: Bruno, Rosaria
name: Mastropietro, Teresa F.
name: De Munno, Giovanni
name: Pardo, Emilio
name: Armentano, Donatella
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Computational Biology

description: We report the two-step synthesis of a novel chiral rod-based porous coordination polymer (PCP). The chemical approach consists of the use of a previously prepared bis(ethylenediamine) copper monomer [Cu(en)]2(NO3)2 [where en = ethylenediamine] reacting with the cytidine 5′-monophosphate (CMP) nucleotide. The bis(ethylenediamine) copper compound—stabilized by axial coordination of nitrate counter-anions—reacts in the presence of sodium salt of CMP to yield right-handed copper(II) chains of P helicity with formula [Cu2(en)2(CMP)2]·5H2O (1). The axial coordination of the CMP2- ligands through the N3 and O2 sites (free nitrogen and carbonyl groups) of the cytosine nucleobase and oxygen atoms of phosphate moieties, ensure stabilization of the neutral chiral polymer. The supramolecular organization involves strong hydrogen bonding interactions to build supramolecular chains of the same helicity. The resulting PCP constitutes one of the few examples of CMP compounds exhibiting coordination involving both nucleobase and phosphate moieties, where a highly stable metal complex is used as precursor for the rational construction of rod-based hydrogen metal-organic frameworks (HMOFs). Furthermore, it shows the intrinsic capability of biomolecules to act as chiral transfer systems.
RETHINK briefs: Improving the practice of science communication
Creators: name: Peter Hyldgård, Frederik Langkjær
Publisher: name: Zenodo
Year: 2022

description: In this report the RETHINK project provides briefs with guidelines and recommendation on how to improve the practice of science communication for three main actor groups: policymakers (at the political level, and at research institutions, as well as research funders), scientists/academia (universities and research institutions), and practitioners (science communicators). The recommendations focus on actions that can be taken by the different actors to support and build better science communication focusing on sensemaking practices in the digital environment. They are in line with the academic science communication literature where training, incentives and infrastructure are the repeated suggestions for improving science communication in general.
Tachynomyia megacephala Turner
Creators: name: Brown, G. R.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tiphiidae
Tachynomyia
Tachynomyia megacephala

description: Tachynomyia megacephala Turner
 Tachynomyia megacephala Turner, 1909: 137.
 Takyomyia megacephala: Kimsey, 1996: 309.
 Tachyphron megacephala: Brown, 2001: 40.
 Material examined. HOLOTYPE: „. Australia: Queensland: Cape York, R. E. Turner, in BMNH.
 Remarks. The genitalia of the holotype of Tachynomyia megacephala are identical to those of the type series of Tachynoides flavopicta (Ritsema) from the Indonesian Island of Aru, and held in the Rijksmuseum van Natuurlijke Historie, Leiden. On the basis of this, this species is synonymized with Tachynoides flavopicta and the species therefore removed from Tachynomyia.
description: Published as part of Brown, G. R., 2005, A revision of Tachyphron Brown and description of two new genera within the Ariphron group (Hymenoptera: Tiphiidae), pp. 197-239 in Journal of Natural History 39 (2) on page 237, DOI: 10.1080/0022290310001657892, http://zenodo.org/record/5214577
Preparation of a dicationic, p-cymene ruthenium(II) dimer, [(p-cymene)Ru(µ-Cl)(P{OCH2}3CEt)]2 2+: structure, characterization and reactivity
Creators: name: Bazemore, Joseph G.
name: Padgett, Clifford W.
name: Quillian, Brandon
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Plant Biology

description: Reaction of (p-cymene)RuCl2(P{OCH2}3CEt) (P{OCH2}3CEt = 4-ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane) with silver tetrakis[(3,5-trifluoromethyl)phenyl]borate (Ag[BArF′]) in the presence of acetonitrile produces the monomeric, cationic, acetonitrile ruthenium(II) compound, [(p-cymene)RuCl(P{OCH2}3CEt)(NCMe)][BArF′] (1), in near quantitative yields (97%). Chloroform solutions of 1 cause precipitation of the binuclear, dicationic ruthenium(II) dimer complex, [(p-cymene)Ru(µ-Cl(P{OCH2}3CEt)]2[BArF′]2 (2), with bridging chloride ligands (73%). Complex 2 can be readily converted back to 1 by treatment with acetonitrile. Complexes 1 and 2 were characterized by 1H, 13C{1H}, 31P{1H}, 19F{1H} nuclear magnetic resonance spectroscopy and infrared spectroscopy. Complex 2 was also characterized by single crystal X-ray crystallography, which revealed a rhomboid Ru2Cl2 core. The two ruthenium ions in 2 are displaced at 3.668 Å, which precludes Ru–Ru bonding. To our knowledge, this is the first cymene ruthenium(II) dimeric complex with bridging halide ligands supported by a monodentate phosphite ligand.
Selected topics in integrable models
Creators: name: Das, Ashok
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In these talks, I discuss a few selected topics in integrable models that are of interest from various points of view. Some open questions are also described.
description: Talks presented at the Swieca summer school, LaTex 36 pages
Visual Attribute Non-Attendance in a Food Choice Experiment: Results From an Eye-tracking Study
Creators: name: Van Loo, Ellen J.
name: Nayga, Rodolfo M.
name: Seo, Han-Seok
name: Verbeke, Wim
name: Van Loo, Ellen J.
name: Nayga, Rodolfo M.
name: Seo, Han-Seok
name: Verbeke, Wim
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agricultural and Food Policy
subject: Marketing
subject: FOS: Economics and business
subject: Research Methods/ Statistical Methods
subject: Eye-tracking
subject: sustainability labeling
subject: Attribute non-attendance
subject: Visual attention
subject: Consumers
subject: Decision making

description: This is a working draft. Please do not cite. The final published version is available at https://doi.org/10.1093/erae/jbx035. The citation of this final is: Van Loo, E.J., R. M. Nayga Jr., D. Campbell, H.-S. Seo, W. Verbeke. 2018. Using eye tracking to account for attribute non-attendance in choice experiments. European Review of Agricultural Economics. DOI 10.1093/erae/jbx035.
RETHINK framework for improving the use of science communication
Creators: name: Frederik Langkjær, Peter Hyldgård
Publisher: name: Zenodo
Year: 2022
Subjects: scicomm, digitalscicomm

description: The framework created by RETHINK aims to support the improvement of the quality of science communication by: 1. Providing an overview of the science communication ecosystem
 2. Raising awareness of the challenges that this ecosystem poses, and
 3. Posing practice-oriented reflexive questions that can help address these challenges The framework can be used by anybody involved in science communication and is based on the project’s research into the digital communication landscape, sensemaking practices, and quality. The framework is layered and intended to be interactive and integrated on the RETHINK website, so that science communicators can click their way through it and seek the information that is relevant to them.
MOESM2 of Population history and genetic adaptation of the Fulani nomads: inferences from genome-wide data and the lactase persistence trait
Creators: name: Vicente, Mário
name: Priehodová, Edita
name: Diallo, Issa
name: Eliška Podgorná
name: Poloni, Estella
name: Černý, Viktor
name: Schlebusch, Carina
Publisher: name: figshare
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Marine Biology
subject: Plant Biology

description: Additional file 2. A pdf file containing supplementary Figures S1-S17.
Producer Perceptions of Risk and Time
Creators: name: Hedge, Kendra M.
name: Yeager, Elizabeth A.
name: Hedge, Kendra M.
name: Yeager, Elizabeth A.
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Farm Management
subject: risk
subject: time management
subject: multinomial logit
subject: ordered logit

description: Agribusinesses rely on producers choosing their products and services for the success of their business. Agribusinesses can use information regarding how producers rate the importance of certain areas of risk and what takes most of the producers’ time to offer specific services to different segments of producers to better meet their needs. An ordered logit model and a multinomial logit model are used to determine factors significant to producers’ use of time and importance of various areas of risk. The results provide insights to agribusinesses that can help them identify producer segments.
Scaling Effects of Transistor Leakage Current and IR Drop on 1T1R Memory Arrays
Creators: name: Chen, Junren
name: Indiveri, Giacomo
Publisher: name: ETH Zurich
Year: 2024
Subjects: 1T1R crossbar
Memory
Memristor
Scaling
Transistor leakage
IR drop
Sensing margin
On/off ratio

description: 1T1R (1-transistor-1-resistor) memory crossbar arrays represent a promising solution for compute-in-memory matrix-vector multiplication accelerators and embedded or storage-class memory. However, the size and scaling of these arrays are hindered by critical challenges, such as the IR drop on metal lines and the accumulation of leakage current from the transistors. Although the IR drop issue has been extensively investigated, the impact of transistor leakage current has received limited attention. In this work, we investigate both issues and highlight how transistor leakage in 1T1R arrays has effects similar to IR drop, which degrades the memory cell sensing margin, especially as the technology node scales down. This degradation could pose reliability concerns, particularly where the on/off ratio or sensing margin of memristors is critical. We characterized the joint effects of transistor read resistance, transistor leakage current, and IR drop as the array size scales up and the fabrication node scales down. Based on a model developed using specifications of a 22nm FDSOI technology, we found that an optimal resistance range of memristors exists for good array scaling capability, where the transistor read resistance and the IR drop issue establish a lower resistance boundary, while the transistor leakage issue sets an upper resistance boundary. This work provides valuable scaling guidelines for engineering the properties of memristor devices in 1T1R memory arrays.
description: arXiv