cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First-principles study of ternary graphite compounds cointercalated with alkali atoms (Li, Na, and K) and alkylamines towards alkali ion battery applications
Creators: name: Ri, Gum-Chol
name: Yu, Chol-Jun
name: Kim, Jin-Song
name: Hong, Song-Nam
name: Jong, Un-Gi
name: Ri, Mun-Hyok
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using density functional theory calculations, we have investigated the structural, energetic, and electronic properties of ternary graphite intercalation compounds (GICs) containing alkali atoms (AM) and normal alkylamine molecules (nC$x$), denoted as AM-nC$x$-GICs (AM=Li, Na, K, $x$=1, 2, 3, 4). The orthorhombic unit cells have been used to build the models for crystalline stage-I AM-nC$x$-GICs. By performing the variable cell relaxations and the analysis of results, we have found that with the increase in the atomic number of alkali atoms the layer separations decreases in contrast to AM-GICs, while the bond lengths of alkali atoms with graphene layer and nitrogen atom of alkylamine decreases. The formation and interlayer binding energies of AM-nC3-GICs have been calculated, indicating the increase in stability from Li to K. The calculated energy barriers for migration of alkali atoms suggest that alkali cation with larger ionic radius diffuses in graphite more smoothly, being similar to AM-GICs. The analysis of density of states, electronic density differences, and atomic populations illustrates a mechanism how the insertion of especially Na among alkali atoms into graphite with first stage can be made easy by cointercalation with alkylamine, more extent of electronic charge transfer is occurred from more electropositive alkali atom to carbon ring of graphene layer, while alkylamine molecules interact strongly with graphene layer through the hybridization of valence electron orbitals.
description: 22 pages, 9 figures
An Efficient Feedback Calibration Algorithm for Direct Imaging Radio Telescopes
Creators: name: Beardsley, Adam P.
name: Thyagarajan, Nithyanandan
name: Bowman, Judd D.
name: Morales, Miguel F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the E-field Parallel Imaging Calibration (EPICal) algorithm, which addresses the need for a fast calibration method for direct imaging radio astronomy correlators. Direct imaging involves a spatial fast Fourier transform of antenna signals, alleviating an $\mathcal{O}(N_{\mathrm{ant}}^2)$ computational bottleneck typical in radio correlators, and yielding a more gentle $\mathcal{O}(N_g \log_2 N_g)$ scaling, where $N_{\mathrm{ant}}$ is the number of antennas in the array and $N_g$ is the number of grid points in the imaging analysis. This can save orders of magnitude in computation cost for next generation arrays consisting of hundreds or thousands of antennas. However, because antenna signals are mixed in the imaging correlator without creating visibilities, gain correction must be applied prior to imaging, rather than on visibilities post-correlation. We develop the EPICal algorithm to form gain solutions quickly and without ever forming visibilities. This method scales as the number of antennas, and produces results comparable to those from visibilities. We use simulations to demonstrate the EPICal technique and study the noise properties of our gain solutions, showing they are similar to visibility based solutions in realistic situations. By applying EPICal to two seconds of Long Wavelength Array data we achieve a 65% dynamic range improvement compared to uncalibrated images, showing this algorithm is a promising solution for next generation instruments.
description: 13 pages, 11 figures, Accepted to MNRAS
How High School Students' Employment Intentions Blend Evaluations of School and Workplace Behaviors
Creators: name: Mitchell, Diane E.
Publisher: name: University of Illinois at Chicago
Year: 2023

description: Not all high school students successfully transition from school to the workplace. Poor attendance, compliance with rules and policies, and task participation contribute to such transitional failures. Attendance, rule compliance, and task participation are needed for success in school and at work, yet little is known about whether students form school and career intentions by isolating or integrating their attitudes, knowledge, and goals toward these behaviors. The Career and Technical Education Program at a comprehensive high school completed parallel surveys about students’ school and career behavioral attitudes, knowledge, and goals. Three statistical models, as well as an integrated model, determined whether students held distinct intentions to engage in school and employability behaviors. After verifying that both school and career intentions included attitudes, knowledge, and goals about attendance, rule-following, and task performance, an integrative model was tested to depict employment intentions as the combination of school and career intentions. Comparing the explanatory power of the three models showed that the integrated model explained more variance than was possible by isolating school and career intentions. These findings suggest that educational programs could improve students’ transition from school to the workplace by offering direct instruction on why behaviors that are common in school and the workplace should converge into strong employment intentions.
Blossoms from black hole seeds: properties and early growth regulated by supernova feedback
Creators: name: Habouzit, Melanie
name: Volonteri, Marta
name: Dubois, Yohan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Massive black holes (BHs) inhabit local galaxies, including the Milky Way and some dwarf galaxies. BH formation, occurring at early cosmic times, must account for the properties of BHs in today's galaxies, notably why some galaxies host a BH, and others do not. We investigate the formation, distribution and growth of BH `seeds' by using the adaptive mesh refinement code Ramses. We develop an implementation of BH formation in dense, low-metallicity environments, as advocated by models invoking the collapse of the first generation of stars, or of dense nuclear star clusters. The seed masses are computed one-by-one on-the-fly, based on the star formation rate and the stellar initial mass function. This self-consistent method to seed BHs allows us to study the distribution of BHs in a cosmological context and their evolution over cosmic time. We find that all high-mass galaxies tend to a host a BH, whereas low-mass counterparts have a lower probability of hosting a BH. After the end of the epoch of BH formation, this probability is modulated by the growth of the galaxy. The simulated BHs connect to low-redshift observational samples, and span a similar range in accretion properties as Lyman-Break Analogs. The growth of BHs in low-mass galaxies is stunted by strong supernova feedback. The properties of BHs in dwarf galaxies thus remain a testbed for BH formation. Simulations with strong supernova feedback, which is able to quench BH accretion in shallow potential wells, produce galaxies and BHs in better agreement with observational constraints.
description: 16 pages, 16 figures, matched the published version
Oscillating behaviour of the spectrum for a plasmonic problem in a domain with a rounded corner
Creators: name: Chesnel, Lucas
name: Claeys, Xavier
name: Nazarov, Sergei A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We investigate the eigenvalue problem $-\text{div}(σ\nabla u) = λu\ (\mathscr{P})$ in a 2D domain $Ω$ divided into two regions $Ω_{\pm}$. We are interested in situations where $σ$ takes positive values on $Ω_{+}$ and negative ones on $Ω_{-}$. Such problems appear in time harmonic electromagnetics in the modeling of plasmonic technologies. In a recent work [15], we highlighted an unusual instability phenomenon for the source term problem associated with $(\mathscr{P})$: for certain configurations, when the interface between the subdomains $Ω_{\pm}$ presents a rounded corner, the solution may depend critically on the value of the rounding parameter. In the present article, we explain this property studying the eigenvalue problem $(\mathscr{P})$. We provide an asymptotic expansion of the eigenvalues and prove error estimates. We establish an oscillatory behaviour of the eigenvalues as the rounding parameter of the corner tends to zero. We end the paper illustrating this phenomenon with numerical experiments.
description: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN), 09/12/2016. arXiv admin note: text overlap with arXiv:1304.4788
Bayesian comparison of nonstandard cosmologies using type Ia supernovae and BAO data
Creators: name: Santos, B.
name: Devi, N. Chandrachani
name: Alcaniz, J. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use the most recent type Ia supernovae (SNe Ia) observations to perform a statistical comparison between the standard $Λ$CDM model and its extensions [$w$CDM and $w(z)$CDM] and some alternative cosmologies: namely, the Dvali--Gabadadze--Porrati (DGP) model, a power-law $f(R)$ scenario in the metric formalism and an example of vacuum decay [$Λ(t)$CDM] cosmology in which the dilution of pressureless matter is attenuated with respect to the usual $a^{-3}$ scaling due to the interaction of the dark matter and dark energy fields. We perform a Bayesian model selection analysis using the \textsc{MultiNest} algorithm. To obtain the posterior distribution for the parameters of each model, we use the joint light-curve analysis (JLA) SNe Ia compilation containing 740 events in the interval $0.01 < z < 1.3$ along with current measurements of baryon acoustic oscillations (BAO). The JLA data are analyzed with the SALT2 light-curve fitter and the model selection is then performed by computing the Bayesian evidence of each model and the Bayes factor of the $Λ$CDM cosmology related to the other models. The results indicate that the JLA data alone are unable to distinguish the standard $Λ$CDM model from some of its alternatives but its combination with current measurements of baryon acoustic oscillations shows up an ability to distinguish them. In particular, the DGP model is practically not supported by both the BAO and the joint JLA + BAO data sets compared to the standard scenario. Finally, we provide a rank order for the models considered.
description: 10 pages, 3 figures, 5 tables, major modifications performed
What to expect from dynamical modelling of galactic haloes
Creators: name: Wang, Wenting
name: Han, Jiaxin
name: Cole, Shaun
name: Frenk, Carlos
name: Sawala, Till
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Many dynamical models of the Milky Way halo require assumptions that the distribution function of a tracer population should be independent of time (i.e., a steady state distribution function) and that the underlying potential is spherical. We study the limitations of such modelling by applying a general dynamical model with minimal assumptions to a large sample of galactic haloes from cosmological $N$-body and hydrodynamical simulations. Using dark matter particles as dynamical tracers, we find that the systematic uncertainties in the measured mass and concentration parameters typically have an amplitude of 25% to 40%. When stars are used as tracers, however, the systematic uncertainties can be as large as a factor of $2-3$. The systematic uncertainties are not reduced by increasing the tracer sample size and vary stochastically from halo to halo. These systematic uncertainties are mostly driven by underestimated statistical noise caused by correlated phase-space structures that violate the steady state assumption. The number of independent phase-space structures inferred from the uncertainty level sets a limiting sample size beyond which a further increase no longer significantly improves the accuracy of dynamical inferences. The systematic uncertainty level is determined by the halo merger history, the shape and environment of the halo. Our conclusions apply generally to any spherical steady-state model.
description: 16 pages, 12 figures, published by MNRAS
Temperature and thermodynamic structure of Einstein's equations for a cosmological black hole
Creators: name: Bhattacharya, Krishnakanta
name: Majhi, Bibhas Ranjan
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is expected that the cosmological black holes are the closest realistic solutions of gravitational theories and they evolve with time. Moreover, the natural way of defining thermodynamic entities for the stationary ones is not applicable in the case of a time dependent spacetime. Here we confine our discussion within the Sultana-Dyer metric which is a cosmological black hole solution of Einstein's gravity. In literature, there exists two expressions of horizon temperature -- one is time dependent and the other does not depend on time. To single out the correct one we find the temperature by studying the Hawking effect in the tunnelling formalism. This leads to time dependent structure. After identifying the correct one, the Einstein's equations are written on the horizon and we show that this leads to the first law of thermodynamics. In this process the expressions for horizon entropy and energy, obtained earlier by explicit calculations, are being used. This provides the evidence that Einstein's equations have thermodynamic structure even for a cosmological black hole spacetime. Moreover, this study further clarifies the correctness of the expressions for the thermodynamic quantities; like temperature, entropy and internal energy.
description: Comments added, to appear in Phys. Rev. D
The LLV Algebra for Primitive Symplectic Varieties and Applications to the du Bois Complex
Creators: name: Tighe, Benjamin William
Publisher: name: University of Illinois at Chicago
Year: 2023

description: We generalize the LLV structure theorem for hyperkahler manifolds to the case of primitive symplectic varieties with isolated singularities, generalizing many applications to the singular setting. We also give some geometric interpretations of singularities in terms of the du Bois complex for general and symplectic varieties.
Interference of the Bloch phase in layered materials with stacking shifts
Creators: name: Akashi, Ryosuke
name: Iida, Yo
name: Yamamoto, Kohei
name: Yoshizawa, Kanako
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In periodic systems, electronic wave functions of the eigenstates exhibit the periodically modulated Bloch phases and are characterized by their wave numbers ${\bf k}$. We theoretically address the effects of the Bloch phase in general layered materials with stacking shift. When the interlayer shift and the Bloch wave vector ${\bf k}$ satisfy certain conditions, interlayer transitions of electrons are prohibited by the interference of the Bloch phase. We specify the manifolds in the ${\bf k}$ space where the hybridization of the Bloch states between the layers is suppressed in accord with the stacking shift. These manifolds, named stacking-adapted interference manifolds (SAIM), are obviously applicable to general layered materials regardless of detailed atomic configuration within the unit cell. We demonstrate the robustness and usefulness of the SAIM with first-principles calculations for layered boron nitride, transition-metal dichalcogenide, graphite, and black phosphorus. We also apply the SAIM to general three-dimensional crystals to derive special ${\bf k}$-point paths for the respective Bravais lattices, along which the Bloch-phase interference strongly suppresses the band dispersion. Our theory provides a general and novel view on the anisotropic electronic kinetics intrinsic to the periodic-lattice structure.
description: 30 pages, 30 figures. v2: Figures added and Reference list corrected. v3: Upon publication, data on black phosphorene added, title changed, derivation of some formulae refined, etc
Crystallographic texture-property data set originating from a simulated multi-step metal forming process
Creators: name: Morand, Lukas
name: Iraki, Tarek
name: Helm, Dirk
Publisher: name: Fraunhofer-Gesellschaft
Year: 2023
Subjects: subject: Crystallographic texture
subject: Metal forming
subject: DDC::500 Naturwissenschaften und Mathematik::530 Physik::531 Klassische Mechanik, Festkörpermechanik
subject: DDC::600 Technik, Medizin, angewandte Wissenschaften::670 Industrielle Fertigung::671 Metallverarbeitung und Rohprodukte aus Metall

description: This publication contains a set of 76980 samples of crystallographic textures (as lists of orientations) and corresponding properties (Youngs modulus E and an anisotropy measure R*, similar to the Lankford coefficients, in three room directions). The data originates from a simulated multi-step metal forming process. The simulation was constrained to perform seven successive process steps of 10% strain at the material point in different directions. In each step, the orientation of the tension operation is chosen randomly from a set of 25 uniformly distributed orientations in the orientation space SO(3).
Characters of the Norm-One Units of Local Division Algebras of Prime Degree
Creators: name: Shechter, Shai
Publisher: name: arXiv
Year: 2015
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We give an explicit construction of all complex continuous irreducible characters of the group ${\rm SL}_1(D)$, where $D$ is a division algebra of prime degree $\ell$ over a local field of odd residual characteristic different than $\ell$. For $\ell$ odd, we show that all such characters of ${\rm SL}_1(D)$ are induced from linear characters of compact-open subgroups of ${\rm SL}_1(D)$. We also compute an explicit formula for the representation zeta function of ${\rm SL}_1(D)$.
description: 33 pages; Methods and organization section added andseveral minor changes made; final version
Spin susceptibility and electron-phonon coupling of two-dimensional materials by range-separated hybrid density functionals: Case study of Li$_x$ZrNCl
Creators: name: Pamuk, Betül
name: Baima, Jacopo
name: Dovesi, Roberto
name: Calandra, Matteo
name: Mauri, Francesco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the capability of density functional theory (DFT) to appropriately describe the spin susceptibility, $χ_s$, and the intervalley electron-phonon coupling in Li$_x$ZrNCl. At low doping, Li$_x$ZrNCl behaves as a two-dimensional two-valley electron gas, with parabolic bands. In such a system, $χ_s$ increases with decreasing doping because of the electron-electron interaction. We show that DFT with local functionals (LDA/GGA) is not capable of reproducing this behavior. The use of exact exchange in Hartree-Fock (HF) or in DFT hybrid functionals enhances $χ_s$. HF, B3LYP, and PBE0 approaches overestimate $χ_s$, whereas the range-separated HSE06 functional leads to results similar to those obtained in the random phase approximation (RPA) applied to a two-valley two-spin electron gas. Within HF, Li$_x$ZrNCl is even unstable towards a ferromagnetic state for $x<0.16$. The intervalley phonons induce an imbalance in the valley occupation that can be viewed as the effect of a pseudomagnetic field. Thus, similarly to what happens for $χ_s$, the electron-phonon coupling of intervalley phonons is enhanced by the electron-electron interaction. Only hybrid DFT functionals capture such an enhancement and the HSE06 functional reproduces the RPA results presented in M. Calandra {\it et al.} [Phys. Rev. Lett. {\bf 114}, 077001 (2015)]. These results imply that the description of the susceptibility and electron-phonon coupling with a range-separated hybrid functional would be important also in other two-dimensional weakly doped semiconductors, such as transition-metal dichalcogenides and graphene.
description: 16 pages, 16 figures
Using numerical plant models and phenotypic correlation space to design achievable ideotypes
Creators: name: Picheny, Victor
name: Casadebaig, Pierre
name: Trépos, Ronan
name: Faivre, Robert
name: Da Silva, David
name: Vincourt, Patrick
name: Costes, Evelyne
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Numerical plant models can predict the outcome of plant traits modifications resulting from genetic variations, on plant performance, by simulating physiological processes and their interaction with the environment. Optimization methods complement those models to design ideotypes, i.e. ideal values of a set of plant traits resulting in optimal adaptation for given combinations of environment and management, mainly through the maximization of a performance criteria (e.g. yield, light interception). As use of simulation models gains momentum in plant breeding, numerical experiments must be carefully engineered to provide accurate and attainable results, rooting them in biological reality. Here, we propose a multi-objective optimization formulation that includes a metric of performance, returned by the numerical model, and a metric of feasibility, accounting for correlations between traits based on field observations. We applied this approach to two contrasting models: a process-based crop model of sunflower and a functional-structural plant model of apple trees. In both cases, the method successfully characterized key plant traits and identified a continuum of optimal solutions, ranging from the most feasible to the most efficient. The present study thus provides successful proof of concept for this enhanced modeling approach, which identified paths for desirable trait modification, including direction and intensity.
description: 25 pages, 5 figures, 2017, Plant, Cell and Environment
title: Abschlussbericht. EnEff:Campus: Intracting an Hochschulen
title: Kontinuierliche Steigerung der Energieeffizienz an Hochschulen durch Implementierung des Intracting-Modells
Creators: name: Ehlert, Marius
name: Fox, Stina
name: Hagedorn, Stephanie
name: Kallok, Jan
name: Kienzlen, Volker
name: Knissel, Jens
name: Krüger, Nadine
name: Liersch, Tobias
name: Lovrekovic, Helena
name: Martinez-Castro, Jesus
name: Radermacher, Annika
name: Schnurr, Dirk
name: Stratmann, Friedrich
name: Von Loessl, Victor
name: Werner, Florian
name: Wetzel, Heike
Publisher: name: Universität Kassel
Year: 2022
Subjects: subject: 333
subject: 690
subject: Energieeffizienz
subject: Finanzinstrument
subject: Hochschule
subject: Energieeinsparung
subject: Energiemanagement
subject: Gebäude

description: Projektbericht zum Forschungsprojekt 03ET1323A
description: Bundesministeriums für Wirtschaft und Klimaschutz (Förderkennzeichen 03ET1323A)
Solvability of the Generalized System of Stochastic Differential Equations in Driven Cavity Single Mode
Creators: name: Bougouffa, Smail
name: Bougoffa, Lazhar
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A useful approach is investigated in order to analyze a class of a stochastic differential equations that can be encountered in quantum optics problems, especially, in the case of two photon losses on the driven cavity mode. The passage to the ordinary coupled differential equations is presented and the treatment of the obtained coupled system is explored. Generalization of the problem to stimulate variable coefficients is discussed and the exact solutions are achieved in explicit forms under suitable conditions on the coefficients.
description: 13 pages, without figures
The use of co-design for dietary interventions: protocol for a 2 week scoping review
Creators: name: Meloncelli, Nina
name: Young, Adrienne
name: Christoffersen, Anja
name: Zhelnov, Pavel
name: Rushton, Alita
name: Wilkinson, Shelley
name: Scott, Anna Mae
name: de Jersey, Susan
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Translational Medical Research
subject: Dietetics and Clinical Nutrition
subject: Nutrition
subject: Medicine and Health Sciences
subject: Life Sciences
subject: co-creation
subject: co-design
subject: community-based participatory research
subject: consumers
subject: co-production
subject: diet
subject: dietetics
subject: lived experience
subject: nutrition
subject: nutrition interventions

description: This review aimed to find, assess and synthesize all study types that used co-design for nutrition interventions delivered within a healthcare, community or academic setting. Eligible studies are detailed under participant, concept and context.
Thermodynamics of the Katok Map
Creators: name: Pesin, Yakov
name: Senti, Samuel
name: Zhang, Ke
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37D25, 37D35, 37D05, 37E10

description: We effect thermodynamical formalism for the non-uniformly hyperbolic $C^\infty$ map of the two dimensional torus known as the Katok map. It is a slowdown of a linear Anosov map near the origin and it is a local (but not small) perturbation. We prove the existence of equilibrium measures for any continuous potential function and obtain uniqueness of equilibrium measures associated to the geometric $t$-potential $φ_t=-t\log |df|_{E^u(x)}|$ for any $t\in(t_0,\infty)$, $t\neq 1$ where $E^u(x)$ denotes the unstable direction. We show that $t_0$ tends to $-\infty$ as the size of the perturbation tends to zero. Finally, we establish exponential decay of correlations as well as the Central Limit Theorem for the equilibrium measures associated to $φ_t$ for all values of $t\in (t_0, 1)$.
description: 31 pages to appear in Ergod. Th. & Dy.nam. Sys
RDA for newcomers
Creators: name: El-Gebali, Sara
Publisher: name: Zenodo
Year: 2023

description: Presentation at: De-mystifying the Research Data Alliance: Learn what it is, how it works and how to get involved https://dri.ie/events/de-mystifying-the-research-data-alliance-learn-what-it-is-how-it-works-and-how-to-get-involved/
A phase II run sum chart for monitoring process mean and variability
Creators: name: Antzoulakos, D. L.
name: Fountoukidis, K. G.
name: Rakitzis, A. C.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
classificationCode: 80699
subject: Information Systems not elsewhere classified
classificationCode: 19999
subject: Mathematical Sciences not elsewhere classified

description: This article proposes a run sum Max chart for monitoring a process and detecting changes in mean and variability simultaneously. A Markov chain method is applied to evaluate the statistical performance of the chart by using both average run length (ARL) and expected average run length (EARL) criteria. The numerical analysis demonstrates an improved performance of the run sum Max control chart over the usual Max chart. In addition, a numerical comparison with the Max-EWMA control chart as well as with the Max chart supplemented with runs rules, reveals that the run sum Max chart outperforms these charts in the detection of moderate to large shifts in both process parameters. Furthermore, we provide practical guidance for the selection of the appropriate charting procedure, while the use of the proposed run sum Max chart in practice is illustrated via a numerical example.
Engagement of health care providers in the provision of personalised medicine for cancer: A scoping review
Creators: name: Shrestha, Shibu
name: Watts, Gemma
name: Geiger, Susi
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Business
subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences
subject: cancer
subject: health care providers
subject: personalised medicine

description: Scoping review protocol
Nonpharmacologic Management of Chronic Pain in the United States’ Medicare Population: A Scoping Review Protocol
Creators: name: Rofe, Kara
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Alternative and Complementary Medicine
subject: Public Health
subject: Medicine and Health Sciences
subject: Cognitive Behavioral Therapy
subject: Medical Specialties
subject: Other Medical Specialties
subject: Health Services Administration
subject: Mental and Social Health
subject: Health and Medical Administration
subject: Health Services Research
subject: chronic pain
subject: evidence synthesis
subject: Medicare
subject: nonpharmacologic
subject: scoping review protocol

description: This is a protocol of a scoping review that will describe the breadth of the literature on access to and utilization of nonpharmacologic therapies to manage chronic pain among people with disabilities and older adults.
A scoping review protocol to systematically synthesise the available evidence on the therapeutic efficacy of AYUSH in treating common skin diseases
Creators: name: Fletcher, John
name: Rahman, Sajitha
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: ayush
subject: india
subject: primary healthcare

description: Scoping Review of AYUSH interventions in common Skin diseases for the Lancet citizens' commission on reimagining India's health system (Citizens' Engagement)
Recurrent neural network for complex survival problems
Creators: name: Marthin, Pius
name: Tutkun, N. Ata
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biotechnology
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
classificationCode: 80699
subject: Information Systems not elsewhere classified
classificationCode: 19999
subject: Mathematical Sciences not elsewhere classified

description: Survival analysis has become one of the paramount procedures in the modeling of time-to-event data. When we encounter complex survival problems, the traditional approach remains limited in accounting for the complex correlational structure between the covariates and the outcome due to the strong assumptions that limit the inference and prediction ability of the resulting models. Several studies exist on the deep learning approach to survival modeling; moreover, the application for the case of complex survival problems still needs to be improved. In addition, the existing models need to address the data structure's complexity fully and are subject to noise and redundant information. In this study, we design a deep learning technique (CmpXRnnSurv_AE) that obliterates the limitations imposed by traditional approaches and addresses the above issues to jointly predict the risk-specific probabilities and survival function for recurrent events with competing risks. We introduce the component termed Risks Information Weights (RIW) as an attention mechanism to compute the weighted cumulative incidence function (WCIF) and an external auto-encoder (ExternalAE) as a feature selector to extract complex characteristics among the set of covariates responsible for the cause-specific events. We train our model using synthetic and real data sets and employ the appropriate metrics for complex survival models for evaluation. As benchmarks, we selected both traditional, and machine learning models and our model demonstrates better performance across all datasets.
A Stochastic Geometry Approach to Asynchronous Aloha Full-Duplex Networks
Creators: name: Munari, Andrea
name: Mähönen, Petri
name: Petrova, Marina
Publisher: name: arXiv
Year: 2015
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In-band full-duplex is emerging as a promising solution to enhance throughput in wireless networks. Allowing nodes to simultaneously send and receive data over the same bandwidth can potentially double the system capacity, and a good degree of maturity has been reached for physical layer design, with practical demonstrations in simple topologies. However, the true potential of full-duplex at a system level is yet to be fully understood. In this paper, we introduce an analytical framework based on stochastic geometry that captures the behaviour of large full-duplex networks implementing an asynchronous random access policy based on Aloha. Via exact expressions we discuss the key tradeoffs that characterise these systems, exploring among the rest the role of transmission duration, imperfect self-interference cancellation and fraction of full-duplex nodes in the network. We also provide protocol design principles, and our comparison with slotted systems sheds light on the performance loss induced by the lack of synchronism.
description: to appear in IEEE/ACM Transactions on Networking, 2017
Slowness and sparseness for unsupervised learning of spatial and object codes from naturalistic data
Creators: name: Franzius, Mathias
Publisher: name: Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I
Year: 2008
Subjects: subject: Hippocampus
subject: Objekterkennung
subject: Ortszellen
subject: Unüberwachtes Lernen
subject: Object Recognition
subject: Place Cells
subject: Unsupervised Learning
subject: 570 Biowissenschaften, Biologie
subject: 32 Biologie
subject: WW 2520
subject: WW 1780

description: Diese Doktorarbeit führt ein hierarchisches Modell für das unüberwachte Lernen aus quasi-natürlichen Videosequenzen ein. Das Modell basiert auf den Lernprinzipien der Langsamkeit und Spärlichkeit, für die verschiedene Ansätze und Implementierungen vorgestellt werden. Eine Vielzahl von Neuronentypen im Hippocampus von Nagern und Primaten kodiert verschiedene Aspekte der räumlichen Umgebung eines Tieres. Dazu gehören Ortszellen (place cells), Kopfrichtungszellen (head direction cells), Raumansichtszellen (spatial view cells) und Gitterzellen (grid cells). Die Hauptergebnisse dieser Arbeit basieren auf dem Training des hierarchischen Modells mit Videosequenzen aus einer Virtual-Reality-Umgebung. Das Modell reproduziert die wichtigsten räumlichen Codes aus dem Hippocampus. Die Art der erzeugten Repräsentationen hängt hauptsächlich von der Bewegungsstatistik des simulierten Tieres ab. Das vorgestellte Modell wird außerdem auf das Problem der invaranten Objekterkennung angewandt, indem Videosequenzen von simulierten Kugelhaufen oder Fischen als Stimuli genutzt wurden. Die resultierenden Modellrepräsentationen erlauben das unabhängige Auslesen von Objektidentität, Position und Rotationswinkel im Raum.
description: This thesis introduces a hierarchical model for unsupervised learning from naturalistic video sequences. The model is based on the principles of slowness and sparseness. Different approaches and implementations for these principles are discussed. A variety of neuron classes in the hippocampal formation of rodents and primates codes for different aspects of space surrounding the animal, including place cells, head direction cells, spatial view cells and grid cells. In the main part of this thesis, video sequences from a virtual reality environment are used for training the hierarchical model. The behavior of most known hippocampal neuron types coding for space are reproduced by this model. The type of representations generated by the model is mostly determined by the movement statistics of the simulated animal. The model approach is not limited to spatial coding. An application of the model to invariant object recognition is described, where artificial clusters of spheres or rendered fish are presented to the model. The resulting representations allow a simple extraction of the identity of the object presented as well as of its position and viewing angle.
Free loci of matrix pencils and domains of noncommutative rational functions
Creators: name: Klep, Igor
name: Volčič, Jurij
Publisher: name: arXiv
Year: 2015
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Consider a monic linear pencil $L(x) = I - A_1x_1 - \cdots - A_gx_g$ whose coefficients $A_j$ are $d \times d$ matrices. It is naturally evaluated at $g$-tuples of matrices $X$ using the Kronecker tensor product, which gives rise to its free locus $Z(L) = \{ X: \det L(X) = 0 \}$. In this article it is shown that the algebras $A$ and $A'$ generated by the coefficients of two linear pencils $L$ and $L'$, respectively, with equal free loci are isomorphic up to radical. Furthermore, $Z(L) \subseteq Z(L')$ if and only if the natural map sending the coefficients of $L'$ to the coefficients of $L$ induces a homomorphism $A'/{\rm rad} A' \to A/{\rm rad} A$. Since linear pencils are a key ingredient in studying noncommutative rational functions via realization theory, the above results lead to a characterization of all noncommutative rational functions with a given domain. Finally, a quantum version of Kippenhahn's conjecture on linear pencils is formulated and proved: if hermitian matrices $A_1, \dots, A_g$ generate $M_d(\mathbb{C})$ as an algebra, then there exist hermitian matrices $X_1, \dots, X_g$ such that $\sum_i A_i \otimes X_i$ has a simple eigenvalue.
description: v4 adds an appendix due independently to Claudio Procesi and \v{S}pela \v{S}penko presenting an invariant-theoretic viewpoint of the paper; v2 is the final version that appeared in print
Planned Pedestrian Zones in City Centers: Design and long-term Development of Plaza Tapatía, Guadalajara
Creators: name: Franco Garza, Daniel
Publisher: name: University of Illinois at Chicago
Year: 2023

description: Pedestrianization constitutes an important urban revitalization strategy that entails adapting the street space for privileged pedestrian use, while restricting automobile access partially or totally. In recent decades, planners worldwide have sought to promote pedestrian-oriented interventions in dense and congested urban settings, aiming to recover public space for residents and users. However, there is a gap in planning literature, especially in the Mexican and Latin American contexts, where many cities seek to regenerate valuable deteriorated central cores. This research employes the lens of spatial planning and design to study Plaza Tapatía pedestrian zone –the largest pedestrian-oriented redevelopment effort ever undertaken in Guadalajara, Mexico–, to draw useful insights for scholars and practitioners. I approach the research from a qualitative perspective, providing interpretative analyses from first-hand empirical data obtained via intensive fieldwork. My findings suggest that thoughtfully conceived spatial planning and physical design –measures for planned pedestrian areas– can promote diverse sub-environments with specific identities and unique user experiences.
Lux in obscuro: Photon Orbits of Extremal Black Holes Revisited
Creators: name: Khoo, Fech Scen
name: Ong, Yen Chin
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been shown in the literature that the event horizon of an extremal asymptotically flat Reissner-Nordstrom black hole is also a stable photon sphere. We further clarify this statement and give a general proof that this holds for a large class of static spherically symmetric black hole spacetimes with an extremal horizon. In contrast, in the Doran frame, an extremal asymptotically flat Kerr black hole has an unstable photon orbit on the equatorial plane of its horizon. In addition, we show that an extremal asymptotically flat Kerr-Newman black hole exhibits two equatorial photon orbits if a < M/2, one of which is on the extremal horizon in the Doran frame and is stable, whereas the second one outside the horizon is unstable. For a > M/2, there is only one equatorial photon orbit, located on the extremal horizon, and it is unstable. There can be no photon orbit on the horizon of a non-extremal Kerr-Newman black hole.
description: Some technical errors in Sec.4.2 are now fixed. Main conclusions unchanged
Nonlinear quantum optics mediated by Rydberg interactions
Creators: name: Firstenberg, Ofer
name: Adams, Charles S.
name: Hofferberth, Sebastian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By mapping the strong interaction between Rydberg excitations in ultra-cold atomic ensembles onto single photons via electromagnetically induced transparency, it is now possible to realize a nonlinear optical medium which exhibits a strong optical nonlinearity at the level of individual photons. We review the theoretical concepts and the experimental state-of-the-art of this exciting new field, and discuss first applications in the field of all-optical quantum information processing.
Coloring graphs with two odd cycle lengths
Creators: name: Ma, Jie
name: Ning, Bo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: In this paper we determine the chromatic number of graphs with two odd cycle lengths. Let $G$ be a graph and $L(G)$ be the set of all odd cycle lengths of $G$. We prove that: (1) If $L(G)=\{3,3+2l\}$, where $l\geq 2$, then $χ(G)=\max\{3,ω(G)\}$; (2) If $L(G)=\{k,k+2l\}$, where $k\geq 5$ and $l\geq 1$, then $χ(G)=3$. These, together with the case $L(G)=\{3,5\}$ solved in \cite{W}, give a complete solution to the general problem addressed in \cite{W,CS,KRS}. Our results also improve a classical theorem of Gyárfás which asserts that $χ(G)\le 2|L(G)|+2$ for any graph $G$.
description: 26 pages,accepted version for publication in SIAM J. Discrete Math
How multiple supernovae overlap to form superbubbles
Creators: name: Yadav, Naveen
name: Mukherjee, Dipanjan
name: Sharma, Prateek
name: Nath, Biman B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We explore the formation of superbubbles through energy deposition by multiple supernovae (SNe) in a uniform medium. We use total energy conserving, 3-D hydrodynamic simulations to study how SNe correlated in space and time create superbubbles. While isolated SNe fizzle out completely by $\sim 1$ Myr due to radiative losses, for a realistic cluster size it is likely that subsequent SNe go off within the hot/dilute bubble and sustain the shock till the cluster lifetime. For realistic cluster sizes, we find that the bubble remains overpressured only if, for a given $n_{g0}$, $N_{\rm OB}$ is sufficiently large. While most of the input energy is still lost radiatively, superbubbles can retain up to $\sim 5-10\%$ of the input energy in form of kinetic+thermal energy till 10 Myr for ISM density $n_{g0} \approx 1$ cm$^{-3}$. We find that the mechanical efficiency decreases for higher densities ($η_{\rm mech} \propto n_{g0}^{-2/3}$). We compare the radii and velocities of simulated supershells with observations and the classical adiabatic model. Our simulations show that the superbubbles retain only $\lesssim 10\%$ of the injected energy, thereby explaining the observed smaller size and slower expansion of supershells. We also confirm that a sufficiently large ($\gtrsim 10^4$) number of SNe is required to go off in order to create a steady wind with a stable termination shock within the superbubble. We show that the mechanical efficiency increases with increasing resolution, and that explicit diffusion is required to obtain converged results.
description: 20 pages, 2 tables and 21 figures, Accepted and Published in MNRAS, new convergence study presented in comparison to work by Gentry et al. 2016(http://adsabs.harvard.edu/abs/2016arXiv160601242G), Comments are welcome
Sasaki-Einstein metrics and K-stability
Creators: name: Collins, Tristan C.
name: Székelyhidi, Gábor
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C25

description: We show that a polarized affine variety admits a Ricci flat Kähler cone metric, if and only if it is K-stable. This generalizes Chen-Donaldson-Sun's solution of the Yau-Tian-Donaldson conjecture to Kähler cones, or equivalently, Sasakian manifolds. As an application we show that the five-sphere admits infinitely many families of Sasaki-Einstein metrics.
description: v2: 64 pages, added proof of converse of main result
Tuning Pairwise Potential Can Control the Fragility of Glass-Forming Liquids: From Tetrahedral Network to Isotropic Soft Sphere Models
Creators: name: Ozawa, Misaki
name: Kim, Kang
name: Miyazaki, Kunimasa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We perform molecular dynamics simulations for a silica glass former model proposed by Coslovich and Pastore (CP) over a wide range of densities. The density variation can be mapped onto the change of the potential depth between Si and O interactions of the CP model. By reducing the potential depth (or increasing the density), the anisotropic tetrahedral network structure observed in the original CP model transforms into the isotropic structure with the purely repulsive soft-sphere potential. Correspondingly, the temperature dependence of the relaxation time exhibits the crossover from the Arrhenius to the super-Arrhenius behavior. Being able to control the fragility over a wide range by tuning the potential of a single model system helps us to bridge the gap between the network and isotropic glass formers and to obtain the insight into the underlying mechanism of the fragility. We study the relationship between the fragility and dynamical properties such as the magnitude of the Stokes-Einstein violation and the stretch exponent in the density correlation function. We also demonstrate that the peak of the specific heat systematically shifts as the density increases, hinting that the fragility is correlated with the hidden thermodynamic anomalies of the system.
description: 24 pages, 29 figures, contribution to the special issue "The Role of Structure in Glassy and Jammed Systems"