cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hopping Parameter Series Construction for Models with Nontrivial Vacuum
Creators: name: Reisz, T.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: Hopping parameter expansions are convergent power series. Under general conditions they allow for the quantitative investigation of phase transition and critical behaviour. The critical information is encoded in the high order coefficients. Recently, 20th order computations have become feasible and used for a large class of lattice field models both in finite and infinite volume. They have been applied to quantum spin models and field theories at finite temperature. The models considered are subject to a global ${\bf Z}_2$ symmetry or to an even larger symmetry group such as O(N) with $N\geq 2$. In this paper we are concerned with the technical details of series computations to allow for a nontrivial vacuum expectation value $\not=0$, which is typical for models that break a global ${\bf Z}_2$ symmetry. Examples are scalar fields coupled to an external field, or manifestly gauge invariant effective models of Higgs field condensates in the electroweak theory, even in the high temperature phase. A nonvanishing tadpole implies an enormous proliferation of graphs and limits the graphical series computation to the 10th order. To achieve the hopping parameter series to comparable order as in the ${\bf Z}_2$ symmetric case, the graphical expansion is replaced by an expansion into new algebraic objects called vertex structures. In this way the 18th order becomes feasible.
description: 19 pages, latex2e
Bosonization Theory of Excitons in One-dimensional Narrow Gap Semiconductors
Creators: name: Lee, H. C.
name: Yang, S. -R. Eric
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Excitons in one-dimensional narrow gap semiconductors of anti-crossing quantum Hall edge states are investigated using a bosonization method. The excitonic states are studied by mapping the problem into a non-integrable sine-Gordon type model. We also find that many-body interactions lead to a strong enhancement of the band gap. We have estimated when an exciton instability may occur.
description: 4pages, 1 figure, to appear in Phys. Rev. B Brief Reports
Additional file 9 of The impact of oxygen on the transcriptome of recombinant S. cerevisiae and P. pastoris - a comparative analysis
Creators: name: Baumann, Kristin
name: Dato, Laura
name: Graf, Alexandra B
name: Frascotti, Gianni
name: Dragosits, Martin
name: Porro, Danilo
name: Mattanovich, Diethard
name: Ferrer, Pau
name: Branduardi, Paola
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Authors’ original file for figure 4
Reference star differential imaging of close-in companions and circumstellar disks with the NIRC2 vortex coronagraph at W.M. Keck Observatory
Creators: name: Ruane, Garreth
name: Ngo, Henry
name: Mawet, Dimitri
name: Absil, Olivier
name: Choquet, Elodie
name: Cook, Therese
name: Gonzalez, Carlos Gomez
name: Huby, Elsa
name: Matthews, Keith
name: Meshkat, Tiffany
name: Reggiani, Maddalena
name: Serabyn, Eugene
name: Wallack, Nicole
name: Xuan, W. Jerry
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Reference star differential imaging (RDI) is a powerful strategy for high contrast imaging. Using example observations taken with the vortex coronagraph mode of Keck/NIRC2 in $L^\prime$ band, we demonstrate that RDI provides improved sensitivity to point sources at small angular separations compared to angular differential imaging (ADI). Applying RDI to images of the low-mass stellar companions HIP 79124 C (192 mas separation, $ΔL^\prime$=4.01) and HIP 78233 B (141 mas separation, $ΔL^\prime$=4.78), the latter a first imaging detection, increases the significance of their detections by up to a factor of 5 with respect to ADI. We compare methods for reference frames selection and find that pre-selection of frames improves detection significance of point sources by up to a factor of 3. In addition, we use observations of the circumstellar disks around MWC 758 and 2MASS J16042165-2130284 to show that RDI allows for accurate mapping of scattered light distributions without self-subtraction artifacts.
description: Accepted for publication in The Astronomical Journal
Thermal resistance by transition between collective and non-collective phonon flows in graphitic materials
Creators: name: Lee, Sangyeop
name: Li, Xun
name: Guo, Ruitiang
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Phonons in graphitic materials exhibit strong normal scattering (N-scattering) compared to umklapp scattering (U-scattering). The strong N-scattering cause collective phonon flow, unlike the relatively common cases where U-scattering is dominant. If graphitic materials have finite size and contact with hot and cold reservoirs emitting phonons with non-collective distribution, N-scattering change the non-collective phonon flow to the collective phonon flow near the interface between graphitic material and a heat reservoir. We study the thermal resistance by N-scattering during the transition between non-collective and collective phonon flows. Our Monte Carlo solution of Peierls-Boltzmann transport equation shows that the N-scattering in graphitic materials reduce heat flux from the ballistic case by around 15%, 30%, and 40% at 100, 200, and 300 K, respectively. This is significantly larger than ~ 5% reduction of Debye crystal with similar Debye temperature (~ 2300 K). We associate the large reduction of heat flux by N-scattering with the non-linear dispersion and multiple phonon branches with different group velocities of graphitic materials.
An electrochemical thermal transistor
Creators: name: Sood, Aditya
name: Xiong, Feng
name: Chen, Shunda
name: Wang, Haotian
name: Selli, Daniele
name: Zhang, Jinsong
name: McClellan, Connor J.
name: Sun, Jie
name: Donadio, Davide
name: Cui, Yi
name: Pop, Eric
name: Goodson, Kenneth E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The ability to actively regulate heat flow at the nanoscale could be a game changer for applications in thermal management and energy harvesting. Such a breakthrough could also enable the control of heat flow using thermal circuits, in a manner analogous to electronic circuits. Here we demonstrate switchable thermal transistors with an order of magnitude thermal on/off ratio, based on reversible electrochemical lithium intercalation in MoS2 thin films. We use spatially-resolved time-domain thermoreflectance to map the lithium ion distribution during device operation, and atomic force microscopy to show that the lithiated state correlates with increased thickness and surface roughness. First principles calculations reveal that the thermal conductance modulation is due to phonon scattering by lithium rattler modes, c-axis strain, and stacking disorder. This study lays the foundation for electrochemically-driven nanoscale thermal regulators, and establishes thermal metrology as a useful probe of spatio-temporal intercalant dynamics in nanomaterials.
Additional file of The impact of oxygen on the transcriptome of recombinant S. cerevisiae and P. pastoris - a comparative analysis
Creators: name: Baumann, Kristin
name: Dato, Laura
name: Graf, Alexandra B
name: Frascotti, Gianni
name: Dragosits, Martin
name: Porro, Danilo
name: Mattanovich, Diethard
name: Ferrer, Pau
name: Branduardi, Paola
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file of The impact of oxygen on the transcriptome of recombinant S. cerevisiae and P. pastoris - a comparative analysis
Darboux class of cosmological fluids with time-dependent adiabatic indices
Creators: name: Rosu, H. C.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A one-parameter family of time dependent adiabatic indices is introduced for any given type of cosmological fluid of constant adiabatic index by a mathematical method belonging to the class of Darboux transformations. The procedure works for zero cosmological constant at the price of introducing a new constant parameter related to the time dependence of the adiabatic index. These fluids can be the real cosmological fluids that are encountered at cosmological scales and they could be used as a simple and efficient explanation for the recent experimental findings regarding the present day accelerating universe. In addition, new types of cosmological scale factors, corresponding to these fluids, are presented
description: document with the following three latex files: 1) quhm.tex: 17 pages, 10 figs, 16 numbered refs, Honorable Mention GRF 2000, 2) errad.tex: Errata and Addenda (EaA) of 5 pages with 2 figs enclosed, 3) analogy.tex: Negative friction of Darboux cosmological fluids of 4 pages
INCIDENTAL FINDING OF EPENDYMOMA IN A CHILD PRESENTING WITH CERVICAL STIFFNESS
Creators: name: Dr. Sonakshi
name: Dr. Praneta Swarup
name: Dr. Meenakshi Bothra
name: Dr. Pradeep Kumar
name: Dr. Jitendra Saini
name: Dr. Vinayak Upadhyay
name: Dr. Akanksha Sahu
Publisher: name: Zenodo
Year: 2024

description: Abstract

Introduction: Tumors derived from ependymal lining of ventricular system are known as Ependymoma. Incidence is 0.4 per 1,00,000 population. Most common amongst childhood brain tumors. Mean age of presentation is 6 years. Clinical presentation depends upon anatomical location. Generally, non invasive, but may extend into ventricular lumen and lead to obstructive hydrocephalus. Surgery is  the primary treatment modality. Case report: A 6 years female presented with headache , neck pain and abnormal body movements. On examination DTR were exaggerated and signs of meningeal irritation were present.Firstly thought to be meningitis, child was managed conservatively with IV antibiotics and Mannitol. Routine investigations were within normal limits. MRI Brain with contrast study was done which was s/o lesion measuring 1.5 x 1.4 cm in 4th ventricle and 1.4 x 1.1 cm in lateral aspect of medulla oblongata (neoplastic etiology- Ependymoma). Conclusion: Ependymoma, although a rare entity,  differential of brain tumors  should be considered in patients presenting with features of raised ICT  and an attempt should be made to ascertain exact etiology. It would help in effective and timely management of these cases.
Dynamical Flavour Symmetry Breaking by a Magnetic Field in Lattice QED_3
Creators: name: Farakos, K.
name: Koutsoumbas, G.
name: Mavromatos, N. E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We perform a lattice study, in the quenched approximation, of dynamical mass generation in a system of relativistic (Dirac) fermions, coupled to an Abelian gauge field in (2+1)-dimensions, in the presence of an external (constant) magnetic field, perpendicular to the spatial planes. It is shown that a strong magnetic field catalyzes chiral symmetry breaking, in agreement with results in the continuum. The rôle of the higher-Landau poles in inducing a critical temperature above which the phenomenon disappears is pointed out. We also discuss the implications of this model on the opening of a gap in doped antiferromagnetic superconductors.
description: 18 pages, latex, 9 figures, uses psfig and epsf; minor typos in eqs.(10) and (17) corrected
A mechanism of synaptic clock underlying subjective time perception
Creators: name: Jura, Bartosz
Publisher: name: arXiv
Year: 2018
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Temporal resolution of visual information processing is thought to be an important factor in predator-prey interactions, shaped in the course of evolution by animals' ecology. Here I show that light can be considered to have a dual role of a source of information, which guides motor actions, and an environmental feedback for those actions. I consequently show how temporal perception might depend on behavioral adaptations realized by the nervous system. I propose an underlying mechanism of synaptic clock, with every synapse having its characteristic time unit, determined by the persistence of memory traces of synaptic inputs, which is used by the synapse to tell time. The present theory offers a testable framework, which may account for numerous experimental findings, including the interspecies variation in temporal resolution and the properties of subjective time perception, specifically the variable speed of perceived time passage, depending on emotional and attentional states or tasks performed.
description: 21 pages, 4 figures
Additional file 3: of Cost-effectiveness-analysis of ultrasound guidance for central venous catheterization compared with landmark method: a decision-analytic model
Creators: name: Seleznova, Yana
name: Brass, Patrick
name: Hellmich, Martin
name: Stock, Stephanie
name: MĂźller, Dirk
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Clinical data input for the probabilistic sensitivity analysis (base-case). (DOC 37 kb)
Schur Multipliers and Second Quandle Homology
Creators: name: Bakshi, Rhea Palak
name: Ibarra, Dionne
name: Mukherjee, Sujoy
name: Nosaka, Takefumi
name: Przytycki, Józef H.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: Primary: 19C09, Secondary: 20J06, 57M27

description: We define a map from second quandle homology to the Schur multiplier and examine its properties. Furthermore, we express the second homology of Alexander quandles in terms of exterior algebras. Additionally, we present a self-contained proof of its structure and provide some computational examples.
description: 16 pages
Magnetic Vortex Lattices in Finite Isospin Chiral Perturbation Theory
Creators: name: Adhikari, Prabal
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study finite isospin chiral perturbation theory ($χ$PT) in a uniform external magnetic field and find the condensation energy of magnetic vortex lattices using the method of successive approximations (originally used by Abrikosov) near the upper critical point beyond which the system is in the normal vacuum phase. The difference between standard Ginzburg-Landau (GL) theory (or equivalently the Abelian Higgs model) and $χ$PT arises due to the presence of additional momentum-dependent (derivative) interactions in $χ$PT and the presence of electromagnetically neutral pions that interact with the charged pions via strong interactions but do not couple directly to the external magnetic field. We find that while the vortex lattice structure is hexagonal similar to vortices in GL theory, the condensation energy (relative to the normal vacuum state in a uniform, external magnetic field) is smaller (larger in magnitude) due to the presence of derivative interactions. Furthermore, we establish that neutral pions do not condense in the vortex lattice near the upper critical field.
description: 9 pages, 4 figures
How do High-Growth Firms Grow? Evidence from Cambridge, UK
Creators: name: Mohr, Vivian
name: Garnsey, Elizabeth
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019

description: This study quantifies the incidence and influence of rapid growth among firms in a high technology milieu. We draw on evidence from a longitudinal database of technology firms in Cambridge UK. Resource configurations and the entrepreneurial matching of resources to opportunities are addressed, using Penrosian growth theory. We examine how certain knowledge-resources of start-ups are related to firms’ subsequent growth. We examine various firm growth modes to track how they are associated with firm and regional growth.
Value Generation in Science and Enterprise: University-Industry Collaboration in the Case of CAMPATH-1
Creators: name: Garnsey, Elizabeth
name: Mohr, Vivian
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019

description: This study quantifies the incidence and influence of rapid growth among firms in a high technology milieu. We draw on evidence from a longitudinal database of technology firms in Cambridge UK. Resource configurations and the entrepreneurial matching of resources to opportunities are addressed, using Penrosian growth theory. We examine how certain knowledge-resources of start-ups are related to firms’ subsequent growth. We examine various firm growth modes to track how they are associated with firm and regional growth.
Social Ventures as Innovators at the Base of the Pyramid
Creators: name: Li, Julia
name: Garnsey, Elizabeth
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: social entrepreneurship, shared value, innovation, business models

description: This paper investigates the unaddressed potential of social ventures to implement social and technological innovations. The innovative activities of social ventures serving populations at the base of the pyramid (BOP) provide relevant evidence. Resource based theory and the concept of business ecosystems provided constructs to be operationalized through case evidence, while case studies helped integrate and adapt these theories to illuminate social entrepreneurship. The framework provides a basis for comparing two different social ventures creating value at the BOP: a technology-based social venture and another undertaking health delivery. These ventures enabled user interaction and feedback and enlisted public-private partnerships. The cases show how social ventures can develop innovative business models that combine internal resources with external resources from their ecosystem in order to build shared value. The conceptual framework can be used to identify key features of other cases of entrepreneurial value creation in conditions of poverty
A reduction-to-absurdity approach using absolutely smooth solid surfaces to unveil the origins of wetting
Creators: name: Liu, Qiao
name: Yu, Jiapeng
name: Wang, Hao
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Contact angle hysteresis and generation of dynamics angle are two fundamental phenomena about the contact angle deviation from the equilibrium state. Roughness on the solid surface, disjoining pressure in the thin film, and liquid-solid adhesion have all been considered as the origins of the phenomena. This work for the first time made a reduction to absurdity by employing absolutely smooth solid surfaces in ultra-large-scale molecular dynamic simulation. The results showed that the equilibrium angles were well established on the absolutely smooth surface just as regular, while the hysteresis and the dynamic angle vanished. The critical structure of the convex nanobending for advancing contact lines vanished as well. In contrast, the solids that made of atoms, even at the minimum roughness, would bring significant angle deviation and convex nanobending. A 3D observation was further made using state-of-the-art helium ion microscopy for the first time revealing the ubiquitous nanoscopic distortion along the contact line on atomically smooth surfaces. The results answer the question of the origin of the angle deviation, that the hysteresis and dynamic angle can be unified to originate from the friction, either static or dynamic; and at the same time resolve the puzzle of the hysteresis existence on reported smooth surfaces, showing that even the minimum i.e. atomic roughness is great enough to be effective on the contact line. The results are against the disjoining pressure theory which ignored the roughness and predicted the occurrence of the hysteresis on absolutely smooth solids.
Additional file 2: of Cost-effectiveness-analysis of ultrasound guidance for central venous catheterization compared with landmark method: a decision-analytic model
Creators: name: Seleznova, Yana
name: Brass, Patrick
name: Hellmich, Martin
name: Stock, Stephanie
name: MĂźller, Dirk
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Cost data input for deterministic and probabilistic sensitivity analyses. (DOC 34 kb)
What effect do sodium-glucose co-transporter 2 (SGLT2) inhibitors have on heart failure in real-world clinical practice? A meta-analysis of observational studies
Creators: name: Hinton, William
name: Ansari, A
name: Whyte, M
name: McGovern, A
name: Feher, M
name: Munro, N
name: De Lusignan, S
Publisher: name: Zenodo
Year: 2021

description: Aims:
 Cardiovascular outcome trials with sodium-glucose co-transporter 2 (SGLT2) inhibitors have demonstrated efficacy in reducing risk for hospitalisation for heart failure in high cardiovascular risk groups. However, it is unclear whether these findings translate to the real-world type 2 diabetes population, and to those at lower risk of cardiovascular events. Methods:
 We used a comprehensive search strategy to identify observational studies that explored the association between SGLT2 inhibitors and heart failure events in people with type 2 diabetes across four databases (PubMed, EMBASE, CINAHL, ISI Web of Science). The identified studies were independently screened by two reviewers using a two-stage screening process. Data were extracted from all eligible studies and those with comparable outcome data were pooled for meta-analysis using random effects models. Results were reported using hazard ratios (HR) with 95% confidence intervals (CI). Results:
 Searches identified 132 studies of which 15 studies met our eligibility criteria, and 14 of these had comparable data for meta-analysis. Compared with other glucose-lowering medications, SGLT2 inhibitors were associated with reduced risk of hospitalisation for heart failure (HR 0.68, 95% CI 0.64-0.72; p<0.0001). Results were broadly consistent across the studies (I2=49%), and the Eggerâ€™s test was not signficant, which suggested that there was no publication bias (p=0.43). Prespecified subgroup analysis of people without a history of cardiovascular disease showed a similar effect (HR 0.64, 95% CI 0.55-0.73; p<0.0001). Conclusions:
 SGLT2 inhibitors reduce the risk of hospitalisation for heart failure in people with type 2 diabetes including those without cardiovascular disease.
Supplementary document for Slight asymmetry induces significant distortion of soot volume fraction measurements in counterflow diffusion flames with diffuse back-illumination imaging - 5691198.pdf
Creators: name: Zhou, Jiwei
name: Zhou, Mengxiang
name: ma, liuhao
name: Wang, Yu
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplements
Taraxacum szepesfalvyi Penzes 1948
Creators: name: Štěpánek, Jan
name: Kirschner, Jan
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Taraxacum
Taraxacum szepesfalvyi

description: Taraxacum szepesfalvyi Pénzes (1948: 7)
 Described from the Pirin („Mosgovica“), probably from along the Mozgovica River, towards Mt. Mozgovishki Shukar. From the protologue description it might be inferred that this name is referable to T. sect. Crocea (glabrous leaves and scapes, leaves narrow, to linear-lanceolate, not divided). It might represent an entire-leaved form of T. paludosiforme but the achene figure (Pénzes 1948: 7) differs from the achene characters in T. paludosiforme. As we did not locate the type specimen, we leave this name for further study.
description: Published as part of Štěpánek, Jan & Kirschner, Jan, 2022, A hotspot of endemism: Oreophytic Taraxacum species (Compositae, Crepidinae) in the mountains of Bulgaria, pp. 1-139 in Phytotaxa 569 (1) on page 135, DOI: 10.11646/phytotaxa.569.1.1, http://zenodo.org/record/7235182
Anomalous Relaxation in the XY Gauge Glass
Creators: name: Kim, Beom Jun
name: Choi, M. Y.
name: Ryu, S.
name: Stroud, D.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: To study relaxation dynamics of the two-dimensional XY gauge glass, we integrate directly the equations of motion and investigate the energy function. As usual, it decays exponentially at high temperatures; at low but non-zero temperatures, it is found to exhibit an algebraic relaxation. We compute the relaxation time $τ$ as a function of the temperature $T$ and find that the rapid increase of $τ$ at low temperatures is well described by $τ\sim (T-T_g)^{-b}$ with $T_g = 0.22 \pm 0.02$ and $b = 0.76 \pm 0.05$, which strongly suggests a finite-temperature glass transition. The decay of vorticity is also examined and explained in terms of a simple heuristic model, which attributes the fast relaxation at high temperatures to annihilation of unpinned vortices.
description: 6 pages, 6 postscript figures, to appear in Phys. Rev. B
Identifying the Parametric Occurrence of Multiple Steady States for some Biological Networks
Creators: name: Bradford, R.
name: Davenport, J. H.
name: England, M.
name: Errami, H.
name: Gerdt, V.
name: Grigoriev, D.
name: Hoyt, C.
name: Kosta, M.
name: Radulescu, O.
name: Sturm, T.
name: Weber, A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Symbolic Computation (cs.SC)
subject: FOS: Computer and information sciences
subject: I.1.4

description: We consider a problem from biological network analysis of determining regions in a parameter space over which there are multiple steady states for positive real values of variables and parameters. We describe multiple approaches to address the problem using tools from Symbolic Computation. We describe how progress was made to achieve semi-algebraic descriptions of the multistationarity regions of parameter space, and compare symbolic results to numerical methods. The biological networks studied are models of the mitogen-activated protein kinases (MAPK) network which has already consumed considerable effort using special insights into its structure of corresponding models. Our main example is a model with 11 equations in 11 variables and 19 parameters, 3 of which are of interest for symbolic treatment. The model also imposes positivity conditions on all variables and parameters. We apply combinations of symbolic computation methods designed for mixed equality/inequality systems, specifically virtual substitution, lazy real triangularization and cylindrical algebraic decomposition, as well as a simplification technique adapted from Gaussian elimination and graph theory. We are able to determine multistationarity of our main example over a 2-dimensional parameter space. We also study a second MAPK model and a symbolic grid sampling technique which can locate such regions in 3-dimensional parameter space.
description: 60 pages - author preprint. Accepted in the Journal of Symbolic Computation
Naked singularities in higher dimensional inhomogeneous dust collapse
Creators: name: Ghosh, S G
name: Beesham, A
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an inhomogeneous dust cloud described by a non self-similar higher dimensional Tolman spacetime. The necessary condition for the formation of a naked singularity or a black hole is obtained. The naked singularities are found to be gravitationally strong in the sense of Tipler and provide another example that violates the cosmic censorship conjecture.
description: 10 pages, LaTeX, no figures
Proton's Electromagnetic Form Factors from a Non-Power Confinement Potential
Creators: name: Kirchbach, M.
name: Compean, C. B.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The electric-charge, and magnetic-dipole form factors of the proton are calculated from an underlying constituent quark picture of hadron structure based on a potential shaped after a cotangent function, which has the properties of being both conformally symmetric and color confining, finding adequate reproduction of a variety of related data.
description: 16 pages, 10 figures, 1 table
lifeforce Taxonomy of the selected perceptual and cognitive skills
Creators: name: University of Thessaly
name: Hellenic Society of Emergency Prehospital Care
name: University Hospital Cologne
name: Italian Resuscitation Council
name: Kids Save Lives – Τα Παιδιά  Σώζουν Ζωές
name: European University Cyprus
Publisher: name: Zenodo
Year: 2021
Subjects: subject: Cardiopulmonary Resuscitation/education
subject: Resuscitation/education

description: Poster for the classification of skills related to the lifeforce BLS algorithm. A range of cognitive, perceptual, language, communication, social and emotional skills related to the application of the lifeforce BLS algorithm. Some of these are involved in all steps of the algorithm, while others are activated at certain stages/steps. These skills have been broken down into building blocks. Each building block has been mapped to the corresponding steps of the algorithm
What can We Learn from Triple Top-Quark Production?
Creators: name: Cao, Qing-Hong
name: Chen, Shao-Long
name: Liu, Yandong
name: Wang, Xiao-Ping
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Different from other multiple top-quark productions, triple top-quark production requires the presence of both flavor violating neutral interaction and flavor conserving neutral interaction. We describe the interaction of triple top-quarks and up-quark in terms of two dimension-6 operators; one can be induced by a new heavy vector resonance, the other by a scalar resonance. Combining same-sign top-quark pair production and four top-quark production, we explore the potential of the 13 TeV LHC on searching for the triple top-quark production.
A Deep Recurrent Q Network towards Self-adapting Distributed Microservices architecture
Creators: name: Magableh, Basel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: One desired aspect of microservices architecture is the ability to self-adapt its own architecture and behaviour in response to changes in the operational environment. To achieve the desired high levels of self-adaptability, this research implements the distributed microservices architectures model, as informed by the MAPE-K model. The proposed architecture employs a multi adaptation agents supported by a centralised controller, that can observe the environment and execute a suitable adaptation action. The adaptation planning is managed by a deep recurrent Q-network (DRQN). It is argued that such integration between DRQN and MDP agents in a MAPE-K model offers distributed microservice architecture with self-adaptability and high levels of availability and scalability. Integrating DRQN into the adaptation process improves the effectiveness of the adaptation and reduces any adaptation risks, including resources over-provisioning and thrashing. The performance of DRQN is evaluated against deep Q-learning and policy gradient algorithms including: i) deep q-network (DQN), ii) dulling deep Q-network (DDQN), iii) a policy gradient neural network (PGNN), and iv) deep deterministic policy gradient (DDPG). The DRQN implementation in this paper manages to outperform the above mentioned algorithms in terms of total reward, less adaptation time, lower error rates, plus faster convergence and training times. We strongly believe that DRQN is more suitable for driving the adaptation in distributed services-oriented architecture and offers better performance than other dynamic decision-making algorithms.
Particles and Strings in Degenerate Metric Spaces
Creators: name: Cabral, Luis A.
name: Rivelles, Victor O.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider relativistic and non-relativistic particles and strings in spaces (or space-times) with a degenerate metric. We show that the resulting dynamics is described by a rich structure of constraints. All constraints are classified and the dynamics depends strongly on the parity of the difference between the dimension of the space (or space-time) and the rank of the degenerate metric. For a particular class of degenerate metrics we can identify the null eigenvectors of the metric with its Killing vectors. We also give the first steps towards the quantization of the non-relativistic particle using the Senjanovic path integral quantization and the Batalin-Fradkin-Tyutin conversion method.
description: 22 pages, revtex
Federated Machine Learning: Concept and Applications
Creators: name: Yang, Qiang
name: Liu, Yang
name: Chen, Tianjian
name: Tong, Yongxin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Today's AI still faces two major challenges. One is that in most industries, data exists in the form of isolated islands. The other is the strengthening of data privacy and security. We propose a possible solution to these challenges: secure federated learning. Beyond the federated learning framework first proposed by Google in 2016, we introduce a comprehensive secure federated learning framework, which includes horizontal federated learning, vertical federated learning and federated transfer learning. We provide definitions, architectures and applications for the federated learning framework, and provide a comprehensive survey of existing works on this subject. In addition, we propose building data networks among organizations based on federated mechanisms as an effective solution to allow knowledge to be shared without compromising user privacy.
Properties of graphene deposited on GaN nanowires: influence of nanowire roughness, self-induced nanogating and defects
Creators: name: Kierdaszuk, Jakub
name: Kaźmierczak, Piotr
name: Grzonka, Justyna
name: Krajewska, Aleksandra
name: Przewłoka, Aleksandra
name: Kaszub, Wawrzyniec
name: Zytkiewicz, Zbigniew R.
name: Sobanska, Marta
name: Kamińska, Maria
name: Wysmołek, Andrzej
name: Drabińska, Aneta
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present detailed Raman studies of graphene deposited on gallium nitride nanowires with different variations in height. Our results show that different density and height of nanowires being in contact with graphene impact graphene properties like roughness, strain and carrier concentration as well as density and type of induced defects. Detailed analysis of Raman spectra of graphene deposited on different nanowire substrates shows that bigger differences in nanowires height increase graphene strain, while higher number of nanowires in contact with graphene locally reduce the strain. Moreover, the value of graphene carrier concentration is found to be correlated with the density of nanowires in contact with graphene. Analysis of intensity ratios of Raman G, D and D' bands enable to trace how nanowire substrate impacts the defect concentration and type. The lowest concentration of defects is observed for graphene deposited on nanowires of the lowest density. Contact between graphene and densely arranged nanowires leads to a large density of vacancies. On the other hand, grain boundaries are the main type of defects in graphene on rarely distributed nanowires. Our results also show modification of graphene carrier concentration and strain by different types of defects present in graphene.
Scopula internataria
Creators: name: Mbata, Keith J.
name: Prins, Jurate De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Geometridae
Scopula
Scopula internataria

description: Scopula internataria (Walker, 1861a)
COMMON NAME(S): Geometer moth.
SYNONYM(S): Acidalia tremula Bastelberger, 1909c.
IUCN STATUS: Not Evaluated (NE).
DISTRIBUTION: Angola, Comoros, Côte d’Ivoire, Democratic Republic of Congo, Kenya, Madagascar, Malawi, Mozambique, Réunion, South Africa, South Sudan, Sudan, Tanzania, Uganda, Yemen, Zambia, Zimbabwe.
LOCALITY IN ZAMBIA: Petauke, Mid Luangwa valley and another locality on Luangwa River East Bank [Latitude, 14.50°S], all in Eastern Province.
LARVAL HOSTPLANT(S): Unknown.
SOURCES: African Moths 2019; De Prins & De Prins 2022; Hampson 1910c.
description: Published as part of Mbata, Keith J. & Prins, Jurate De, 2023, Annotated checklist of moths of Zambia (Insecta: Lepidoptera), pp. 1-503 in Zootaxa 5354 (1) on page 252, DOI: 10.11646/zootaxa.5354.1.1, http://zenodo.org/record/10130434
On the constant-roll inflation with large and small $η_H$
Creators: name: Gao, Qing
name: Gong, Yungui
name: Yi, Zhu
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the seemingly duality between large and small $η_H$ for the constant-roll inflation with the second slow-roll parameter $η_H$ being a constant. In the previous studies, only the constant-roll inflationary models with small $η_H$ are found to be consistent with the observations. The seemingly duality suggests that the constant-roll inflationary models with large $η_H$ may be also consistent with the observations. We find that the duality between the constant-roll inflation with large and small $η_H$ does not exist because both the background and scalar perturbation evolutions are very different. By fitting the constant-roll inflationary models to the observations, we get $-0.016\leη_H\le-0.0078$ at the 95\% C.L if we take $N=60$ for the models with increasing $ε_H$ in which inflation ends when $ε_H=1$, and $3.0135\le η_H\le 3.021$ at the 68\% C.L., and $3.0115\le η_H\le 3.024$ at the 95\% C.L. for the models with decreasing $ε_H$.
description: 13 pages, 4 figures
Stochastic Resonance in Noisy Non-Dynamical Systems
Creators: name: Vilar, J. M. G.
name: Gomila, G.
name: Rubí, J. M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We have analyzed the effects of the addition of external noise to non-dynamical systems displaying intrinsic noise, and established general conditions under which stochastic resonance appears. The criterion we have found may be applied to a wide class of non-dynamical systems, covering situations of different nature. Some particular examples are discussed in detail.
description: 4 pages, RevTex, 3 PostScript figures available upon request
Pressure dependence of Tc in the MgB2 superconductor as probed by resistivity measurements
Creators: name: Saito, E.
name: Taknenobu, T.
name: Ito, T.
name: Iwasa, Y.
name: Prassides, K.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High-pressure resistivity experiments were performed on the recently discovered superconductor, MgB2. Tc decreases quasi-linearly with applied pressure to 1.4 GPa at a rate of -2.0(1) K/GPa, which is somewhat larger than that derived from recently-reported ac susceptibility measurements. The reduction of Tc is consistent with the BCS picture, in a similar way to the C60-based superconductors. Taking into account the pressure dependence of the unit cell volume, V, the volume coefficient of Tc, d(lnTc)/dV is significantly large.
description: 6 pages, 2 figures
The Newtonian Correspondence
Creators: name: Abbassi, Amir H.
name: Abbassi, Amir M.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is shown that the field equations of general relativity in the Einstein tensor form and the unimodular theory of gravity do not fulfill the correspondence principle commitment completely. The consistent formalisms are briefly discussed.
description: 10 pages,no figure, Latex2e,revised,the title changed,references added
Mirage Cosmology
Creators: name: Kehagias, A.
name: Kiritsis, E.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A brane universe moving in a curved higher dimensional bulk space is considered. The motion induces a cosmological evolution on the universe brane that is indistiguishable from a similar one induced by matter density on the brane. The phenomenological implications of such an idea are discussed. Various mirage energy densities are found, corresponding to dilute matter driving the cosmological expansion, many having superluminal properties $|w|>1$ or violating the positive energy condition. It is shown that energy density due to the world-volume fields is nicely incorporated into the picture. It is also pointed out that the initial singularity problem is naturally resolved in this context.
description: JHEP LateX, 20 pages, no figures;v2 references added and a few minor changes; (v3) Corrected an inconsequential error in eq. 6.2, 6.3. We thank D. Kutasov for bringing this to our attention (v4) Corrected inconsequential errors in (4.4)-(4.7) and (5.11). We thank A. Psinas for bringing them to our attention
Vortex mediated microwave absorption in superclean layered superconductors
Creators: name: Koulakov, A. A.
name: Larkin, A. I.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In the superclean case the spectrum of vortex core excitations in the presence of disorder is not random but consists of two series of equally-spaced levels. The I-V characteristics of such superconductors displays many interesting phenomena. A series of resonances is predicted at frequencies commensurate with the spacing of the vortex excitations. These resonances reveal an even-odd anomaly. In the presence of one weak impurity the excitation levels can approach each other and almost cross. Absorption at very low frequencies is identified with the resonances arising in this case. The results of such microscopic theory coincide up to the order of magnitude with both the theory employing kinetic equation and the experiment. The non-linear effects associated with Zener transitions in such crossings are studied. These phenomena can be used as a probe of vortex core excitations.
description: 11 pages, 2 Postscript figures
First-principles and semiempirical calculations for F centers in KNbO3
Creators: name: Eglitis, R. I.
name: Christensen, N. E.
name: Kotomin, E. A.
name: Postnikov, A. V.
name: Borstel, G.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The linear muffin-tin-orbital method combined with density functional theory (local approximation) and the semiempirical method of the intermediate neglect of the differential overlap (INDO) based on the Hartree-Fock formalism are used for the study of the $F$ centers (O vacancy with two electrons) in cubic and orthorhombic ferroelectric KNbO$_3$ crystals. Calculations for 39-atom supercells show that the two electrons are considerably delocalized even in the ground state of the defect. Their wave functions extend over the two Nb atoms closest to the O vacancy and over other nearby atoms. Thus, the $F$ center in KNbO$_3$ resembles electron defects in the partially-covalent SiO$_2$ crystal (the so-called $E^{\prime}_1$ center) rather than usual $F$ centers in ionic crystals like MgO and alkali halides. This covalency is confirmed by the analysis of the electronic density distribution. Absorption energies were calculated by means of the INDO method using the $Δ$ self-consistent-field scheme after a relaxation of atoms surrounding the $F$ center. For the orthorhombic phase three absorption bands are calculated to lie at 2.72 eV, 3.04 eV, and 3.11 eV. The first one is close to that observed under electron irradiation. For the cubic phase, stable at high temperatures, above 708 K, only the two bands, at 2.73 eV and 2.97 eV, are expected.
description: 7 pages, including 4 postscript figures; with minor changes, as will appear in Phys. Rev. B
The Wireless Control Plane: An Overview and Directions for Future Research
Creators: name: Mazied, EmadelDin A.
name: ElNainay, Mustafa Y.
name: Abdel-Rahman, Mohammad J.
name: Midkiff, Scott F.
name: Rizk, Mohamed R. M.
name: Rakha, Hesham A.
name: MacKenzie, Allen B.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Software-defined networking (SDN), which has been successfully deployed in the management of complex data centers, has recently been incorporated into a myriad of 5G networks to intelligently manage a wide range of heterogeneous wireless devices, software systems, and wireless access technologies. Thus, the SDN control plane needs to communicate wirelessly with the wireless data plane either directly or indirectly. The uncertainties in the wireless SDN control plane (WCP) make its design challenging. Both WCP schemes (direct WCP, D-WCP, and indirect WCP, I-WCP) have been incorporated into recent 5G networks; however, a discussion of their design principles and their design limitations is missing. This paper introduces an overview of the WCP design (I-WCP and D-WCP) and discusses its intricacies by reviewing its deployment in recent 5G networks. Furthermore, to facilitate synthesizing a robust WCP, this paper proposes a generic WCP framework using deep reinforcement learning (DRL) principles and presents a roadmap for future research.
description: This paper has been accepted to appear in Elsevier Journal of Networks and Computer Applications. It has 34 pages, 8 figures, and two tables
title: Ανάπτυξη απλοϊκού μοντέλου για την ανάκτηση θερμότητας καυσαερίων από κινητήρα diesel
titleType: AlternativeTitle
title: Development of simple model for exhaust gas heat recovery from diesel engine
Creators: name: Vasiliou, Thomas E.
Publisher: name: National Technological University of Athens
Year: 2007
Subjects: Ανάκτηση θερμότητας
Καυσαέρια
Κύκλος Rankine
Κινητήρας Diesel
Σύστημα απαγωγής θερμότητας
Heat recovery
Gas
Rankine
Diesel motor
Heat abduction system

description: 77 σ.
description: Θεωρητική διερεύνηση της ανάκτησης της θερμότητας καυσαερίων από κινητήρες Diesel και της μετατροπής της σε μηχανική ισχύ.
description: Theoretical research of exhaust gas heat recovery from Diesel engines and conversion to mechanical power.