cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Experimental studies and modelling of charge transport and defect states in disordered organic semiconductors
Creators: name: Shi, Xingyuan
Publisher: name: Imperial College London
Year: 2017

description: Understanding and optimising charge carrier transport in conjugated polymers is an important challenge for the realisation of organic electronic devices. The transport properties are complicated by the intrinsic disorder in these soft solids, that leads to disorder in the energies and spatial extent of electronic states and in the strength of electronic coupling between them. Traditionally, different disorder models have been used to describe charge transport but the models tend to be descriptive and experimental measurements are often contradictory. The complex origins of disorder have made it difficult to correlate any transport property uniquely with specific defects. This thesis addresses the specific relationship between hole transport and microstructure for selected conjugated polymers. In the first results chapter, we show that the effect of introducing a known conformational defect, the β-phase, into poly(9,9)dioctylfluorene (PFO) is to reduce the time-of-flight hole mobility by two orders of magnitude and the steady state hole mobility by less than one order of magnitude. We develop a high-dynamic-range photocurrent measurement to probe the density of states and show that the β-defect introduces an additional sharp feature into the hole density-of-states (DoS) ~0.3 eV below the transport level. The effect on DoS is confirmed with complementary electrochemical technique and agrees with theory. We then reconcile the different observations from transient and steady-state measurements using an energy resolved device model and conclude that a non-thermal-equilibrium picture is needed to interpret transient measurements in such disordered materials. The second results chapter shows that hole mobility can be controlled and in some cases increased by use of nucleating agents and crystallisation kinetics to promote growth of large crystallites in PFO films; further optimisation may lead to percolation through the crystalline phase. We also show that the effect of a chemical defect (keto defect) on hole transport is relatively minor, despite major impact on emission properties, and in contrast with prior reports. Finally, we show that hole transport in a high mobility indacenodithiophene-altbenzothiadiazole copolymer is indeed fast but not, as previously reported, trap free. Nevertheless, further efforts to improve hole mobility should address inter-chain coupling rather than intra-chain transport.
SLOCC classification for nine families of four-qubits
Creators: name: Li, D.
name: Li, X.
name: Huang, H.
name: Li, X.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In Phys. Rev. A 62, 062314 (2000), Dür, Vidal and Cirac indicated that there are infinitely many SLOCC classes for four qubits. Verstraete, Dehaene, and Verschelde in Phys. Rev. A 65, 052112 (2002) proposed nine families of states corresponding to nine different ways of entangling four qubits. In Phys. Rev. A 75, 022318 (2007), Lamata et al. reported that there are eight true SLOCC entanglement classes of four qubits up to permutations of the qubits. In this paper, we investigate SLOCC classification of the nine families proposed by Verstraete, Dehaene and Verschelde, and distinguish 49 true SLOCC entanglement classes from them.
description: 19 pages, no figures
Exploring the semantic inconsistency effect in scenes using a continuous measure of linguistic similarity
Creators: name: Damiano, Claudia
name: Wagemans, Johan
name: Leemans, Maarten
Publisher: name: OSF Registries
Year: 2024
Subjects: subject: Cognitive Psychology
subject: Cognition and Perception
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: Viewers use contextual information to visually explore complex scenes. Object recognition is facilitated by exploiting object-scene relations (which objects are expected in a given scene) and object-object relations (which objects are expected based on the occurrence of other objects). Semantically inconsistent objects deviate from these expectations, and thus they tend to capture viewers’ attention (i.e., semantic inconsistency effect). Some objects fit the identity of a scene more or less than others, yet semantic inconsistencies have hitherto been operationalised as binary (consistent vs. inconsistent). In an eye-tracking experiment (N = 21 adults), we study the semantic inconsistency effect in a continuous manner by using the linguistic similarity of an object to the scene category and to other objects in the scene. We find that both highly consistent and highly inconsistent objects are viewed more than other objects (U-shaped relationship), revealing that the (in)consistency effect is more than a simple binary classification.
Control of recollision wave packets for molecular orbital tomography using short laser pulses
Creators: name: van der Zwan, Elmar V.
name: Lein, Manfred
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The tomographic imaging of arbitrary molecular orbitals via high-order harmonic generation requires that electrons recollide from one direction only. Within a semi-classical model, we show that extremely short phase-stabilized laser pulses offer control over the momentum distribution of the returning electrons. By adjusting the carrier-envelope phase, recollisions can be forced to occur from mainly one side, while retaining a broad energy spectrum. The signatures of the semi-classical distributions are observed in harmonic spectra obtained by numerical solution of the time-dependent Schrödinger equation.
description: 8 pages, 4 figures; v2: Added some extra clarifications; v3: minor grammatical changes
Food security in Kharkiv during the war
Creators: name: V. N. Karazin Kharkiv National University
Publisher: name: V.N.Karazin Kharkiv National University
Year: 2024

description: Food security is an important aspect of the stability and wellbeing of the population of Kharkiv, especially in times of war. According to UN standards, food security implies the availability of sufficient food, physical and economic access to it, and its stability over time. Given the large-scale shelling, displacement of people, destruction of infrastructure and the risk of logistical disruption, Kharkiv's food security is facing serious challenges
On Colour Rearrangement in Hadronic W$^+$W$^-$ Events
Creators: name: Sjöstrand, Torbjörn
name: Khoze, Valery
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the possibility of colour rearrangement in $\ee \to \W^+ \W^- \to \q_1 \qbar_2 \q_3 \qbar_4$ events, i.e.\ that the original colour singlets $\q_1 \qbar_2$ and $\q_3 \qbar_4$ may be transmuted, for instance, into new singlets $\q_1 \qbar_4$ and $\q_3 \qbar_2$. The effects on event properties could be quite large if such a rearrangement would occur instantaneously, so that gluon emission would be restricted to each of the new singlets separately. We argue that such a scenario is unlikely for two reasons. Firstly, the $\W^+$ and $\W^-$ usually decay at separate times after the $\W^+\W^-$ production, which leads to large relative phases for energetic radiation off the two constituents of a rearranged system, and a corresponding dampening of the QCD cascades. Secondly, within the perturbative scenario the colour transmutation appears only in order $α_s^2$ and is colour-suppressed. Colour reconnection at longer time scales is quite feasible, however, and may affect the fragmentation phase. If so, the nature of non-perturbative QCD can be probed in a new way. We formulate several alternative toy models and use these to estimate the colour reconnection probability as a function of the event kinematics. Possible consequences for LEP~2 events are illustrated, with special attention to systematic errors in $\W$ mass determinations.
description: 45 pages, 19 Figures, Latex File, Durham Preprint DTP/93/74, CERN Preprint CERN-TH.7011/93
Trigonometry in extended hyperbolic space and extended de Sitter space
Creators: name: Cho, Yunhi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 51M10, 51M25, 53C50

description: We study the hyperbolic cosine and sine laws in the extended hyperbolic space which contains hyperbolic space as a subset and is an analytic continuation of the hyperbolic space. And we also study the spherical cosine and sine laws in the extended de Sitter space which contains de Sitter Space $S^n_1$ as a subset and is also an analytic continuation of de Sitter space. In fact, the extended hyperbolic space and extended de Sitter space are the same space only differ by -1 multiple in the metric. Hence these two extended spaces clearly show and apparently explain that why many corresponding formulas in hyperbolic and spherical space are very similar each other. From these extended trigonometry laws, we can give a coherent and geometrically simple explanation for the various relations between the lengths and angles of hyperbolic polygons and relations on de Sitter polygons which lie on $S^2_1$.
description: 31 pages 20 figures
KHARKIV ON THE WAY TO FOOD SECURITY: FOOD PRACTICES AND 5R PRINCIPLES
Creators: name: V. N. Karazin Kharkiv National University
Publisher: name: V.N.Karazin Kharkiv National University
Year: 2023

description: In this brochure, we would like to tell you about the activities of the forum participants and highlight the main points of their reports, as the invited stakeholders are actively working on food security issues in Kharkiv and Kharkiv region during the war. Among the invited participants of our forum were: Kharkiv City Council;Department of Agricultural Development of the Kharkiv Regional Military Administration; The Main Department of the State Service of Ukraine for Food Safety and Consumer Protection in Kharkiv region; Charitable organization “Charitable Foundation “Source of the Revival” (CFSR); Relief Coordination Center (Kharkiv Region); FSLC in Kharkiv Region; Humanitarian organization “Corus International”; “Zero Waste Kharkiv”; NGO “Green Landia”; Karazin Institute of Environmental Sciences; School of Sociology, Karazin University.
Total Ionizing Dose Effects on Threshold Switching in 1T-Tantalum Disulfide Charge-Density-Wave Devices
Creators: name: Liu, G.
name: Zhang, E. X.
name: Liang, C. D.
name: Bloodgood, M. A.
name: Salguero, T. T.
name: Fleetwood, D. M.
name: Balandin, A. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The 1T polytype of TaS2 exhibits voltage-triggered threshold switching as a result of a phase transition from nearly commensurate to incommensurate charge density wave states. Threshold switching, persistent above room temperature, can be utilized in a variety of electronic devices, e.g., voltage controlled oscillators. We evaluated the total-ionizing-dose response of thin film 1T-TaS2 at doses up to 1 Mrad(SiO2). The threshold voltage changed by less than 2% after irradiation, with persistent self-sustained oscillations observed through the full irradiation sequence. The radiation hardness is attributed to the high intrinsic carrier concentration of 1T-TaS2 in both of the phases that lead to threshold switching. These results suggest that charge density wave devices, implemented with thin films of 1T-TaS2, are promising for applications in high radiation environments.
description: 4 pages; 4 figures
Isospectral orbifolds with different maximal isotropy orders
Creators: name: Rossetti, Juan Pablo
name: Schueth, Dorothee
name: Weilandt, Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58J53, 58J50, 53C20

description: We construct pairs of compact Riemannian orbifolds which are isospectral for the Laplace operator on functions such that the maximal isotropy order of singular points in one of the orbifolds is higher than in the other. In one type of examples, isospectrality arises from a version of the famous Sunada theorem which also implies isospectrality on $p$-forms; here the orbifolds are quotients of certain compact normal homogeneous spaces. In another type of examples, the orbifolds are quotients of Euclidean $\R^3$ and are shown to be isospectral on functions using dimension formulas for the eigenspaces. In the latter type of examples the orbifolds are not isospectral on 1-forms. Along the way we also give several additional examples of isospectral orbifolds which do not have maximal isotropy groups of different size but other interesting properties.
description: 17 pages, 6 figures; revised Theorem 2.5
Evaluation and improvement of ETSI ITS Contention-Based Forwarding (CBF) of warning messages in highway scenarios
Creators: name: Amador, Oscar
name: Urueña, Manuel
name: Calderon, Maria
name: Soto, Ignacio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This paper evaluates the performance of the ETSI Contention-Based Forwarding (CBF) GeoNetworking protocol for distributing warning messages in highway scenarios, including its interaction with the Decentralized Congestion Control (DCC) mechanism. Several shortcomings of the standard ETSI CBF algorithm are identified, and we propose different solutions to these problems, which are able to reduce the number of transmissions by an order of magnitude, while reducing the message end-to-end delay and providing a reliability close to 100% in a large area of interest.
CP Violation in Fermion Pair Decays of Neutral Boson Particles
Creators: name: He, Xiao-Gang
name: Ma, J. P.
name: McKellar, B.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study CP violation in fermion pair decays of neutral boson particles with spin 0 or 1. We study a new asymmetry to measure CP violation in $η, K_L \rightarrow μ^+μ^-$ decays and discuss the possibility of measuring it experimentally. For the spin-1 particles case, we study CP violation in the decays of $J/ψ$ to $SU(3)$ octet baryon pairs. We show that these decays can be used to put stringent constraints on the electric dipole moments of $Λ$, $Σ$ and $Ξ$.
description: 14p, OZ-93/22, UM-93/89, OITS 519
Zeno-clocking the Auger decay
Creators: name: Boström, Emil Viñas
name: Gisselbrecht, Mathieu
name: Brage, Tomas
name: Almbladh, Carl-Olof
name: Mikkelsen, Anders
name: Verdozzi, Claudio
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A tenet of time-resolved spectroscopy is -faster laser pulses for shorter timescales- . Here we suggest turning this paradigm around, and slow down the system dynamics via repeated measurements, to do spectroscopy on longer timescales. This is the principle of the quantum Zeno effect. We exemplify our approach with the Auger process, and find that repeated measurements increase the core-hole lifetime, redistribute the kinetic energy of Auger electrons, and alter entanglement formation. We further provide an explicit experimental protocol for atomic Li, to make our proposal concrete.
description: 5 pages, 4 figures, supplemental material provided
Time-dependent droplet detachment behaviour from wettability-engineered fibers during fog harvesting
Creators: name: Saha, Arijit
name: Datta, Arkadeep
name: Mukhopadhyay, Arani
name: Datta, Amitava
name: Ganguly, Ranjan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Water collection from natural and industrial fogs has recently been viewed as a viable freshwater source. An interesting outgrowth of the relevant research as focused on arresting of the drift losses (un-evaporated and re-condensed water droplets present in the exhaust plume from industrial cooling towers. Such exploits in fog collection have implemented metal and polyester meshes as fog water collectors (FWC). Fog droplets impinge and deposit on mesh fibers. They coalesce with previously deposited liquid to evolve as larger drops before detaching from the fibers under their own weight, an event largely dependent on the mesh fiber wettability, diameter and its arrangement relative to the fog flow. To better estimate drainage and hence collection from these fibers, the study, focuses on droplet detachment from differently wetted horizontally positioned cylindrical fibers of various diameters, placed orthogonally in the path of an oncoming fog. Droplet detachment volume is found to increase with fiber diameter and fiber surface wettability. Interestingly, in a typical fogging condition, the detachment volume is also found to exhibit a time-dependent behaviour, altering the droplet detachment criteria otherwise predicted from emulation. Our current study sheds light on this unexplored phenomenon.
description: Presented at the Fluid Mechanics and Fluid Power Conference, India (2022). Corresponding author: ranjan.ganguly@jadavpuruniversity.in . Lecture Notes in Mechanical Engineering. Springer, Singapore (2024)
Hierarchy construction schemes within the Scale set framework
Creators: name: Pruvot, Jean Hugues
name: Brun, Luc
Publisher: name: arXiv
Year: 2007
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Segmentation algorithms based on an energy minimisation framework often depend on a scale parameter which balances a fit to data and a regularising term. Irregular pyramids are defined as a stack of graphs successively reduced. Within this framework, the scale is often defined implicitly as the height in the pyramid. However, each level of an irregular pyramid can not usually be readily associated to the global optimum of an energy or a global criterion on the base level graph. This last drawback is addressed by the scale set framework designed by Guigues. The methods designed by this author allow to build a hierarchy and to design cuts within this hierarchy which globally minimise an energy. This paper studies the influence of the construction scheme of the initial hierarchy on the resulting optimal cuts. We propose one sequential and one parallel method with two variations within both. Our sequential methods provide partitions near the global optima while parallel methods require less execution times than the sequential method of Guigues even on sequential machines.
ECONOMIC VIEWS OF ABU NASR FORABI.
Creators: name: Asrakulova, Adiba
Publisher: name: Zenodo
Year: 2025

description: This article provides a detailed description of the progressive ideas of Abu Nasr Al-Farabi in the works of Abu Nasr Al-Farabi on the role of material needs in the formation of society, property relations, ownership of property, the purposeful use of property, and self-sufficiency of people.
Astrophysical Condition on the attolensing as a possible probe for a modified gravity theory
Creators: name: Sato, Takahiro
name: Gunara, Bobby E.
name: Yamamoto, Kazuhiro
name: Zen, Freddy P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the wave effect in the gravitational lensing by a black hole with very tiny mass less than 10^-19 solar mass, which is called attolensing, motivated by a recent report that the lensing signature might be a possible probe of a modified gravity theory in the braneworld scenario. We focus on the finite source size effect and the effect of the relative motion of the source to the lens, which are influential to the wave effect in the attolensing. Astrophysical condition that the lensed interference signature can be a probe of the modified gravity theory is demonstrated. The interference signature in the microlensing system is also discussed.
description: Accepted for publication in IJMPA
title: The “Too Big to Fail” Subsidy in Canada: Some Estimates
Creators: name: Mora, Patricia Palhau
Publisher: name: Bank of Canada
Year: 2018

description: Implicit government guarantees of banking-sector liabilities reduce market discipline by private sector stakeholders and temper the risk sensitivity of funding costs. This potentially increases the likelihood of bailouts from taxpayers, especially in the absence of effective resolution frameworks. Estimates of “too big to fail” (TBTF) implicit subsidies are useful to understand bank agents’ incentives, measure potential resolution costs and assess the credibility of regulatory reform. Given the implicit nature of the subsidy, I propose a framework that adopts two empirical approaches to assess the quantum of the subsidies accruing to systemic banks in Canada. The first is based on credit rating agencies’ assessment of public support and the second relies on a contingent claims analysis. Results suggest more progress on resolution is needed, such as the implementation of a credible statutory bail-in regime for senior obligations, to increase market discipline and help address TBTF externalities. That said, Canada being an early adopter of Basel III might help explain the significant reduction in the government’s contingent liability since the peak years of the crisis.
description: Les garanties implicites offertes par l’État à l’égard des passifs du secteur bancaire réduisent la discipline de marché exercée par les intervenants du secteur privé et atténuent la sensibilité au risque des coûts de financement. Cela pourrait accroître la probabilité que l’argent des contribuables serve à renflouer les caisses d’institutions financières, particulièrement en l’absence de cadres de résolution efficaces. Les estimations des subventions implicites octroyées aux institutions financières trop importantes pour faire faillite permettent de comprendre les motivations des agents financiers, de mesurer les coûts éventuels de la résolution et d’évaluer la crédibilité de la réforme réglementaire. Compte tenu de la nature implicite de la subvention, l’auteure propose un cadre qui repose sur deux approches empiriques pour évaluer la valeur des crédits octroyés aux banques d’importance systémique au Canada. La première est fondée sur l’évaluation faite par les agences de notation du soutien public et la seconde s’appuie sur une analyse des créances contingentes. Les résultats montrent que le processus de résolution doit être amélioré, par exemple en instaurant un régime obligatoire de recapitalisation interne crédible pour les obligations de premier rang, afin de renforcer la discipline de marché et de faciliter la résolution des externalités des institutions trop importantes pour faire faillite. Cela dit, le fait que le Canada a été l’un des premiers pays à adopter le dispositif de Bâle III pourrait expliquer la réduction considérable du passif éventuel du gouvernement depuis les sommets atteints durant la crise.
Memory-induced complex contagion in epidemic spreading
Creators: name: Hoffmann, Xavier R.
name: Boguñá, Marián
Publisher: name: arXiv
Year: 2018
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Albeit epidemic models have evolved into powerful predictive tools for the spread of diseases and opinions, most assume memoryless agents and independent transmission channels. We develop an infection mechanism that is endowed with memory of past exposures and simultaneously incorporates the joint effect of multiple infectious sources. Analytic equations and simulations of the susceptible-infected-susceptible model in unstructured substrates reveal the emergence of an additional phase that separates the usual healthy and endemic ones. This intermediate phase shows fundamentally distinct characteristics, and the system exhibits either excitability or an exotic variant of bistability. Moreover, the transition to endemicity presents hybrid aspects. These features are the product of an intricate balance between two memory modes and indicate that non-Markovian effects significantly alter the properties of spreading processes.
description: 10 pages, 8 figures, revised text, supplemental material
title: ADCO, Sixième cartulaire de Saint-Étienne de Dijon (1662), Cart. 30 (G 133), 441 folios, f. 173
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP

description: Sixième cartulaire de Saint-Étienne de Dijon (1662), Archives départementales de la Côte-d'Or, Cart. 30 (G 133), 441 folios, f. 173, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Sixième cartulaire de Saint-Étienne de Dijon (1662), Archives départementales de la Côte-d'Or, Cart. 30 (G 133), 441 folios, f. 173, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: http://www.wikidata.org/entity/Q15945019
description: Provenance: abbaye Saint-Étienne de Dijon
Higgs Boson Interference in $γγ\rightarrow W^+W^-$
Creators: name: Morris, D. A.
name: Truong, T. N.
name: Zappala, D.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study interference effects between resonant and nonresonant amplitudes for the $γγ\rightarrow W^+ W^-$ process at a backscattered photon-photon collider. We show that a Higgs boson with $M_H$ > 200 GeV is manifest as a resonant dip in the $W^+W^-$ invariant mass spectrum and we investigate its statistical significance.
description: 8 pages (LaTeX) + 5 PostScript figures in accompanying file (uuencoded), figures also available by fax upon request to reyes@uclaph.bitnet, UCLA/TEP/93/35
Ultrafast Electron-Phonon Decoupling in Graphite
Creators: name: Ishioka, Kunie
name: Hase, Muneaki
name: Kitajima, Masahiro
name: Wirtz, Ludger
name: Rubio, Angel
name: Petek, Hrvoje
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the ultrafast dynamics of the 47.4 THz coherent phonons of graphite interacting with a photoinduced non-equilibrium electron-hole plasma. Unlike conventional materials, upon photoexcitation the phonon frequency of graphite upshifts, and within a few picoseconds relaxes to the stationary value. Our first-principles density functional calculations demonstrate that the phonon stiffening stems from the light-induced decoupling of the non-adiabatic electron-phonon interaction by creating the non-equilibrium electron-hole plasma. Time-resolved vibrational spectroscopy provides a window on the ultrafast non-equilibrium electron dynamics.
description: 4 pages, 4 figures
An MDD Approach to Multidimensional Bin Packing
Creators: name: Kell, Brian
name: Willem-Jan Van Hoeve
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: We investigate the application of multivalued decision dia- grams (MDDs) to multidimensional bin packing problems. In these problems, each bin has a multidimensional capacity and each item has an associated multidimensional size. We develop several MDD representations for this problem, and explore different MDD construction methods including a new heuristic-driven depth-first compilation scheme. We also derive MDD restrictions and relaxations, using a novel application of a clustering algorithm to identify approximate equivalence classes among MDD nodes. Our experimental results show that these techniques can significantly outperform current CP and MIP solvers.
The Picard-Fuchs equation in classical and quantum physics: Application to higher-order WKB method
Creators: name: Kreshchuk, Michael
name: Gulden, Tobias
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Picard-Fuchs equation is a powerful mathematical tool which has numerous applications in physics, for it allows to evaluate integrals without resorting to direct integration techniques. We use this equation to calculate both the classical action and the higher-order WKB corrections to it, for the sextic double-well potential and the Lamé potential. Our development rests on the fact that the Picard-Fuchs method links an integral to solutions of a differential equation with the energy as a parameter. Employing the same argument we show that each higher-order correction in the WKB series for the quantum action is a combination of the classical action and its derivatives. From this, we obtain a computationally simple method of calculating higher-order quantum-mechanical corrections to the classical action, and demonstrate this by calculating the second-order correction for the sextic and the Lamé potential. This paper also serves as a self-consistent guide to the use of the Picard-Fuchs equation.
Integrability of geodesic flows and isospectrality of Riemannian manifolds
Creators: name: Schueth, Dorothee
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58J53; 53D25

description: We construct a pair of compact, eight-dimensional, two-step Riemannian nilmanifolds $M$ and $M'$ which are isospectral for the Laplace operator on functions and such that $M$ has completely integrable geodesic flow in the sense of Liouville, while $M'$ has not. Moreover, for both manifolds we analyze the structure of the submanifolds of the unit tangent bundle given by to maximal continuous families of closed geodesics with generic velocity fields. The structure of these submanifolds turns out to reflect the above (non)integrability properties. On the other hand, their dimension is larger than that of the Lagrangian tori in $M$, indicating a degeneracy which might explain the fact that the wave invariants do not distinguish an integrable from a nonintegrable system here. Finally, we show that for $M$, the invariant eight-dimensional tori which are foliated by closed geodesics are dense in the unit tangent bundle, and that both $M$ and $M'$ satisfy the so-called Clean Intersection Hypothesis.
description: 19 pages, no figures
An Issue-Oriented Review of the Research on Absenteeism
Creators: name: Atkin, Robert S.
name: Goodman, Paul S.
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: This paper is a review of the critical issues in understanding absenteeism. Its purpose is to identify those critical problems or issues that must be resolved in order to develop literature that has both theoretical substance and practical implications Five sections comprise the paper.. Following an opening discussion of the critical theoretical assumptions that underlie absenteeism, sections two and three focus on methodological issues, The first of these concerns measurement of absenteeism, while the second concerns strategies for analyzing absenteeism, Issues underlying both the measurement and analysis of absenteeism are intimately tied to the theoretical discussion of absenteeism and also have importance f or practice The fourth section examines the consequences of absenteeism; instead of considering absenteeism a dependent variable to be explained, we consider how absenteeism affects other behaviors such as productivity, accidents, and so on The review concludes with a section on issues in managing absenteeism, with particular attention given to examples drawn from the coal industry
He Burned His Boats
Creators: name: Barnes, Roscoe
Publisher: name: figshare
Year: 2020
Subjects: subject: 220401 Christian Studies (incl. Biblical Studies and Church History)
subject: FOS: Philosophy, ethics and religion
subject: 220402 Comparative Religious Studies
subject: 220499 Religion and Religious Studies not elsewhere classified
subject: 220405 Religion and Society
subject: Religious Studies

description: This is an inspirational article I wrote over 30 years ago in the early days of my career. The article, “He Burned His Boats,” appeared in the October 1985 issue of Lighted Pathway, a Church of God youth publication. It is based on the story of Hernan Cortez (sometimes spelled Cortes), who reportedly burned his ships behind him in order to keep his men from turning back.
Squeezed Quantum State of Disoriented Chiral Condensate
Creators: name: Kogan, Ian I.
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We consider the quantum state describing the Disoriented Chiral Condensate (DCC) which may be produced in high energy collisions. Using the approach suggested by Rajagopal and Wilczek to describe the amplification of the long wavelength classical pion modes, we consider the quantum-mechanical evolution of the initial vacuum state into the final squeezed state describing the DCC. The obtained wave function has some interesting properties which are discussed.
description: 9 pages
title: High-Frequency Trading and Institutional Trading Costs
Creators: name: Chen, Marie
name: Garriott, Corey
Publisher: name: Bank of Canada
Year: 2018

description: Using data on Canadian bond futures, we examine how high-frequency traders (HFTs) interact with institutions building large positions. In contrast to recent findings, we find HFTs in the data act as small-sized liquidity suppliers, and we reject the hypothesis that they engage in back running, a predatory trading strategy. Using a quasi-experiment in November 2011, in which a number of HFTs started trading the bond future, we run a difference-in-differences event study and find more competition among HFTs improves implementation shortfall, effective spreads, and short-term price impacts for institutional trading in Canadian bond futures.
description: Au moyen de données relatives au marché des contrats à terme sur obligations du Canada, nous examinons les interactions entre les opérateurs qui pratiquent la négociation à haute fréquence et les investisseurs institutionnels qui prennent d’importantes positions sur ces contrats. Contrairement aux conclusions d’études récentes, nos résultats indiquent que les opérateurs à haute fréquence jouent le rôle de petits fournisseurs de liquidité, et nous rejetons l’hypothèse selon laquelle ils auraient recours à la stratégie de prédation que constitue le parasitisme (back running). Nous appliquons une approche quasi expérimentale à des observations remontant au mois de novembre 2011, alors qu’un certain nombre d’opérateurs à haute fréquence faisaient leur entrée sur ce marché, et procédons à une étude événementielle fondée sur la méthode des doubles différences. Nos résultats montrent qu’une concurrence accrue de ces opérateurs réduit à la fois le décalage lié à l’exécution des transactions, les écarts de taux effectifs et l’incidence à court terme sur les prix pour les investisseurs institutionnels actifs sur ce marché.
Primordial magnetic fields and nonlinear electrodynamics
Creators: name: Kunze, Kerstin E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The creation of large scale magnetic fields is studied in an inflationary universe where electrodynamics is assumed to be nonlinear. After inflation ends electrodynamics becomes linear and thus the description of reheating and the subsequent radiation dominated stage are unaltered. The nonlinear regime of electrodynamics is described by lagrangians having a power law dependence on one of the invariants of the electromagnetic field. It is found that there is a range of parameters for which primordial magnetic fields of cosmologically interesting strengths can be created.
description: 21 pages, 3 figures
Reinforcement Learning Paycheck Optimization for Multivariate Financial Goals
Creators: name: Alaluf, Melda
name: Crippa, Giulia
name: Geng, Sinong
name: Jing, Zijian
name: Krishnan, Nikhil
name: Kulkarni, Sanjeev
name: Navarro, Wyatt
name: Sircar, Ronnie
name: Tang, Jonathan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study paycheck optimization, which examines how to allocate income in order to achieve several competing financial goals. For paycheck optimization, a quantitative methodology is missing, due to a lack of a suitable problem formulation. To deal with this issue, we formulate the problem as a utility maximization problem. The proposed formulation is able to (i) unify different financial goals; (ii) incorporate user preferences regarding the goals; (iii) handle stochastic interest rates. The proposed formulation also facilitates an end-to-end reinforcement learning solution, which is implemented on a variety of problem settings.
An Integrated Solver for Optimization Problems
Creators: name: Tallys  Yunes
name: Ionuţ D Aron
name: Hooker, John N.
Publisher: name: Carnegie Mellon University
Year: 1979
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: One of the central trends in the optimization community over the past several years has been the steady improvement of general-purpose solvers. A logical next step in this evolution is to combine mixed integer linear programming, constraint programming, and global optimization in a single system. Recent research in the area of integrated problem solving suggests that the right combination of different technologies can simplify modeling and speed up computation substantially. Nevertheless, integration often requires special purpose coding, which is time-consuming and error-prone. We present a general purpose solver, SIMPL, that allows its user to replicate (and sometimes improve on) the results of custom implementations with concise models written in a high-level language. We apply SIMPL to production planning, product configuration, machine scheduling, and truss structure design problems on which customized integrated methods have shown significant computational advantage. We obtain results that either match or surpass the original codes at a fraction of the implementation effort.
Electric-field control of oxygen vacancy and magnetic phase transition in cobaltite/manganite bilayer
Creators: name: Cui, B.
name: Song, C.
name: Li, F.
name: Zhong, X. Y.
name: Wang, Z. C.
name: Werner, P.
name: Gu, Y. D.
name: Wu, H. Q.
name: Peng, J. J.
name: Saleem, M. S.
name: Parkin, S. S. P.
name: Pan, F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Manipulation of oxygen vacancies (V_O) in single oxide layers by varying the electric field can result in significant modulation of the ground state. However, in many oxide multilayers with strong application potentials, e.g. ferroelectric tunnel junctions and solid-oxide fuel cells, understanding V_O behaviour in various layers under an applied electric field remains a challenge, owing to complex V_O transport between different layers. By sweeping the external voltage, a reversible manipulation of V_O and a corresponding fixed magnetic phase transition sequence in cobaltite/manganite (SrCoO3-x/La0.45Sr0.55MnO3-y) heterostructures are reported. The magnetic phase transition sequence confirms that the priority of electric-field-induced V_O formation/annihilation in the complex bilayer system is mainly determined by the V_O formation energies and Gibbs free energy differences, which is supported by theoretical analysis. We not only realize a reversible manipulation of the magnetic phase transition in an oxide bilayer, but also provide insight into the electric field control of V_O engineering in heterostructures.
description: 30 pages, 7 figures
Determining the Gluon Distributions in the Proton and Photon from Two-Jet Production at HERA
Creators: name: Forshaw, JR
name: Roberts, RG
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Two-jet production from the direct photon contribution at HERA is a sensitive measure of the small-$x$ gluon in the proton. We propose measurements of ratios of the jet cross-sections which will clearly distinguish between gluons with or without singular behaviour at small $x$. Furthermore, we show that analogous ratio measurements for the resolved photon contribution provide a sensitive way of determining the gluon distribution in the photon.
description: Rutherford Appleton Laboratory report RAL-93-071 7 pages 3 figs Fig2 and Fig3 included as psfiles
Correlated partial disorder in a weakly frustrated quantum antiferromagnet
Creators: name: Gonzalez, M. G.
name: Lisandrini, F. T.
name: Blesio, G. G.
name: Trumper, A. E.
name: Gazza, C. J.
name: Manuel, L. O.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Partial disorder --the microscopic coexistence of long-range magnetic order and disorder-- is a rare phenomenon, that has been experimental and theoretically reported in some Ising- or easy plane-spin systems, driven by entropic effects at finite temperatures. Here, we present an analytical and numerical analysis of the $S=1/2$ Heisenberg antiferromagnet on the $\sqrt{3}\times \sqrt{3}$-distorted triangular lattice, which shows that its quantum ground state has partial disorder in the weakly frustrated regime. This state has a 180$^\circ$ Néel ordered honeycomb subsystem, coexisting with disordered spins at the hexagon center sites. These central spins are ferromagnetically aligned at short distances, as a consequence of a Casimir-like effect originated by the zero-point quantum fluctuations of the honeycomb lattice.
description: 6 pages + Supplemental Material. Final version to appear in Physical Review Letters
Whole blood flow cytometry protocol for the assessment of platelet phenotype, function, and cellular interactions
Creators: name: Yaw, Hui Ping
name: Van den Helm, Suelyn
name: Linden, Matthew
name: Monagle, Paul
name: Ignjatovic, Vera
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology
subject: 110309 Infectious Diseases

description: Platelets are a key component of the hemostatic system and their roles in inflammation via interactions with leukocytes have also gained attention in recent years. Changes in platelet phenotype and function can cause bleeding and/or thrombosis and, as such, monitoring platelet-specific changes is crucial to assessing hemostasis in the clinical setting. Currently, available platelet function tests such as platelet aggregometry and thromboelastography require a large volume of blood, which is a major limitation for the pediatric population. Whole blood flow cytometric analysis of platelets is increasingly utilized in recent years, primarily due to the sensitivity of this method, but also because it only requires a small amount of blood with minimal sample manipulation. We have developed a whole blood flow cytometry methodological approach that enables the assessment of platelet phenotype, function, and their interactions with monocytes and neutrophils.
Assessment of neonatal management in somali Sudanese hospital
Creators: name: Nima, Mohamed Mohamud
Publisher: name: Zenodo
Year: 2025
Subjects: Assessment of
neonatal
management
in somali Sudanese hospital

description: Abstract

Neonatal management is a critical component of maternal and child healthcare, ensuring the survival and well-being of newborns during their first 28 days of life. This study assesses neonatal management at Somali Sudanese Specialist Hospital, focusing on risk factors, environmental influences, and socio-demographic determinants affecting neonatal care.

Using a cross-sectional study design, data was collected through structured questionnaires and interviews with healthcare professionals and mothers. The findings indicate that low birth weight, neonatal infections, birth asphyxia, and respiratory distress syndrome are major challenges in neonatal management. Environmental factors such as poor sanitation, inadequate medical resources, and limited access to skilled healthcare professionals further contribute to neonatal complications. Socio-demographic factors, including maternal education, economic status, and healthcare awareness, play a significant role in neonatal health outcomes.

The study highlights the need for improved neonatal care services, including enhanced training for healthcare providers, increased access to essential medical supplies, and community-based education programs on neonatal health. Recommendations include strengthening neonatal intensive care units (NICUs), implementing standardized neonatal care protocols, and increasing government and stakeholder support for maternal and child health initiatives. These findings provide valuable insights for policymakers, healthcare institutions, and organizations working to improve neonatal care in Somalia.
Conformal transformation in the scalar-tensor theory applied to the accelerating universe
Creators: name: Fujii, Yasunori
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The scalar-tensor theory is plagued by nagging questions if different conformal frames, in particular the Jordan and Einstein conformal frames, are equivalent to each other. As a closely related question, there are opposing views on which of the two conformal frames is physically acceptable. Reinforcing our previous claims, we offer replies based on a cosmological model of the scalar-tensor theory, believed to be a promising theory for understanding the accelerating universe, as well as today's version of the cosmological constant problem. Exploiting the advantage that this model admits analytical asymptotic solutions, our argument does not depend on whether the underlying theory is invariant under conformal transformations. Our argument provides partial support for the claimed "equivalence," but we also present examples that require more careful analyses exploiting field equations. We also point out that the Jordan conformal frame is suitable for an interpretation in terms of unification theories in physics, for example, string theory and the Kaluza-Klein approach, while the Einstein conformal frame may be acceptable as a physical conformal frame under two conditions: (i) the simplest constant $Λ$ term in the Lagrangian in the Jordan conformal frame; (ii) the revised form of the conventional Brans-Dicke model based on the validity of weak equivalence principle.
description: 36 pages with 1 figure