cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
GreenDCN: a General Framework for Achieving Energy Efficiency in Data Center Networks
Creators: name: Wang, Lin
name: Zhang, Fa
name: Aroca, Jordi Arjona
name: Vasilakos, Athanasios V.
name: Zheng, Kai
name: Hou, Chenying
name: Li, Dan
name: Liu, Zhiyong
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The popularization of cloud computing has raised concerns over the energy consumption that takes place in data centers. In addition to the energy consumed by servers, the energy consumed by large numbers of network devices emerges as a significant problem. Existing work on energy-efficient data center networking primarily focuses on traffic engineering, which is usually adapted from traditional networks. We propose a new framework to embrace the new opportunities brought by combining some special features of data centers with traffic engineering. Based on this framework, we characterize the problem of achieving energy efficiency with a time-aware model, and we prove its NP-hardness with a solution that has two steps. First, we solve the problem of assigning virtual machines (VM) to servers to reduce the amount of traffic and to generate favorable conditions for traffic engineering. The solution reached for this problem is based on three essential principles that we propose. Second, we reduce the number of active switches and balance traffic flows, depending on the relation between power consumption and routing, to achieve energy conservation. Experimental results confirm that, by using this framework, we can achieve up to 50 percent energy savings. We also provide a comprehensive discussion on the scalability and practicability of the framework.
description: 14 pages, accepted by IEEE JSAC
Theoretical description of X-ray absorption spectroscopy of the graphene-metal interfaces
Creators: name: Voloshina, E. N.
name: Ovcharenko, R. E.
name: Shulakov, A. S.
name: Dedkov, Yu. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The present manuscript considers the application of the method of the near-edge X-ray absorption spectroscopy (NEXAFS) for the investigation of the graphene-based systems (from free-standing graphene to the metal-intercalation-like systems). The NEXAFS spectra for the selected systems are calculated in the framework of the approach, which includes the effects of the dynamic core-hole screening. The presented spectral changes from system to system are analysed with the help of the corresponding band-structure calculations. The obtained results are compared with available experimental data demonstrating the excellent agreement between theory and experiment. The direct correlation between the strength of the graphene interaction with the metallic substrate and the spectral distributions (shape and intensities of π* and σ* features in the C K NEXAFS spectra) is found that can be taken as a fingerprint for the description of interaction at the graphene/metal interface.
description: accepted in J. Chem. Phys.; NEXAFS/XES/XMCD project: https://sites.google.com/site/elsaspectroscopy
A wave front approximation method and its application to elastic stress waves
Creators: name: Jakub, Marlyn T.
Publisher: name: California Institute of Technology
Year: 1965
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering
subject: Mechanical engineering

description: This paper presents a new direct method of obtaining wave front approximations for problems involving hyperbolic differential equations. In the problem of a semi-infinite, end-loaded elastic strip (the problem used to illustrate the method), asymptotic solutions are obtained for wave fronts prior to multiple edge interactions. For the special end loading of a step velocity, the results agree with prior results obtained by more complex methods of approximation. Extension of the method to multiple interactions and to other problems of stress wave propagation is briefly discussed.
Self-averaging stochastic Kohn-Sham density functional theory
Creators: name: Baer, Roi
name: Neuhauser, Daniel
name: Rabani, Eran
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We formulate the Kohn-Sham density functional theory (KS-DFT) as a statistical theory in which the electron density is deter-mined from an average of correlated stochastic densities in a trace formula. The key idea is that it is sufficient to converge the total energy per electron to within a predefined statistical error in order to obtain reliable estimates of the electronic band structure, the forces on nuclei, the density and its moments, etc. The fluctuations in the total energy per electron are guaranteed to decay to zero as the system size increases. This facilitates "self-averaging" which leads to the first ever report of sublinear scaling KS-DFT electronic structure. The approach sidesteps calculation of the density matrix and thus is insensitive to its evasive sparseness, as demonstrated here for silicon nanocrystals. The formalism is not only appealing in terms of its promise to far push the limits of application of KS-DFT, but also represents a cognitive change in the way we think of electronic structure calculations as this stochastic theory seamlessly converges to the thermodynamic limit.
description: 4 pages, 4 figures
Study on Mobile Technology, Social Media and 180 Million People
Creators: name: Adesugba Adesoji
Publisher: name: Zenodo
Year: 2021
Subjects: Information technology
population
growth rate
internet
social media

description: In the last 30 years, developed economies throughout the world have utilised Information Technology (IT) in many aspects of life, particularly in its use to promote efficiency in companies and the links between the company and its internal and external stakeholders. Though technology has been integrated in everyday life in established economies throughout the world, particularly in the way they define strategy and business, little can be said about the progress of such new technologies in developing countries for a variety of reasons. Poverty, insufficient facilities, poor Internet penetration, high energy costs, corruption, and an unpredictable political system are all issues that have contributed to the low adoption and use of IT in developing nations to far. Since the mid-2000s, however, the pattern appears to be shifting. As a result of the increasing use of smart phones, internet use has increased, becoming more accessible to a mostly young and educated population in recent years.
Quantum annealing with more than one hundred qubits
Creators: name: Boixo, Sergio
name: Rønnow, Troels F.
name: Isakov, Sergei V.
name: Wang, Zhihui
name: Wecker, David
name: Lidar, Daniel A.
name: Martinis, John M.
name: Troyer, Matthias
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum technology is maturing to the point where quantum devices, such as quantum communication systems, quantum random number generators and quantum simulators, may be built with capabilities exceeding classical computers. A quantum annealer, in particular, solves hard optimisation problems by evolving a known initial configuration at non-zero temperature towards the ground state of a Hamiltonian encoding a given problem. Here, we present results from experiments on a 108 qubit D-Wave One device based on superconducting flux qubits. The strong correlations between the device and a simulated quantum annealer, in contrast with weak correlations between the device and classical annealing or classical spin dynamics, demonstrate that the device performs quantum annealing. We find additional evidence for quantum annealing in the form of small-gap avoided level crossings characterizing the hard problems. To assess the computational power of the device we compare it to optimised classical algorithms.
description: 23 pages, 38 figures. Revised version. Text rewritten for clarity, added comparison with spin dynamics model
Chiral dark matter and radiative neutrino masses from gauged U(1) symmetry
Creators: name: Babu, K. S.
name: Chakdar, Shreyashi
name: K, Vishnu P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We propose a class of dark matter models based on a chiral $U(1)$ gauge symmetry acting on a dark sector. The chiral $U(1)$ protects the masses of the dark sector fermions, and also guarantees the stability of the dark matter particle by virtue of an unbroken discrete $\mathcal{Z}_N$ gauge symmetry. We identify 38 such $U(1)$ models which are descendants of a chiral $SU(3) \times SU(2)$ gauge symmetry, consisting of a minimal set of fermions with simple $U(1)$ charge assignments. We show how these models can also be utilized to generate small Majorana neutrino masses radiatively via the scotogenic mechanism with the dark sector particles circulating inside loop diagrams. We further explore the phenomenology of the simplest model in this class, which admits a Majorana fermion, Dirac fermion or a scalar field to be the dark matter candidate, and show the consistency of various scenarios with constraints from relic density and direct detection experiments.
description: 18 pages + references, 9 figures
A Bayesian view of the Higgs sector with higher dimensional operators
Creators: name: Dumont, Beranger
name: Fichet, Sylvain
name: von Gersdorff, Gero
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the possibilities of New Physics affecting the Standard Model (SM) Higgs sector. An effective Lagrangian with dimension-six operators is used to capture the effect of New Physics. We carry out a global Bayesian inference analysis, considering the recent LHC data set including all available correlations, as well as results from Tevatron. Trilinear gauge boson couplings and electroweak precision observables are also taken into account. The case of weak bosons tensorial couplings is closely examined and NLO QCD corrections are taken into account in the deviations we predict. We consider two scenarios, one where the coefficients of all the dimension-six operators are essentially unconstrained, and one where a certain subset is loop suppressed. In both scenarios, we find that large deviations from some of the SM Higgs couplings can still be present, assuming New Physics arising at 3 TeV. In particular, we find that a significantly reduced coupling of the Higgs to the top quark is possible and slightly favored by searches on Higgs production in association with top quark pairs. The total width of the Higgs boson is only weakly constrained and can vary between 0.7 and 2.7 times the Standard Model value within 95% Bayesian credible interval (BCI). We also observe sizeable effects induced by New Physics contributions to tensorial couplings. In particular, the Higgs boson decay width into $Zγ$ can be enhanced by up to a factor 12 within 95% BCI.
description: 37 pages, 10 figures, references added, published in JHEP
The quantitative effect of a flexible fuselage on the symmetric torsional modes of the wings of a large airplane
Creators: name: Dunn, William C.
name: Furer, Albert B.
Publisher: name: California Institute of Technology
Year: 1944
Subjects: Aeronautics
Aeronautical Engineering

description: Using Holzer's method of frequency calculation, the natural frequencies for the first two modes of torsional vibration of the wing were determined for a representative conventional airplane (B24-C) in the customary manner, the fuselage being considered as a rigid body. Next, using a method developed by N. O. Myklestad of the Guggenheim Aeronautics Laboratory at the California Institute of Technology, combined with Holzer's method, the natural
frequencies for the same two modes of vibration were again determined, but with the fuselage this time being considered as flexible.

A comparison of results of the two methods indicates that in considering the fuselage as being flexible, a decrease in the natural frequency of torsional vibration may be expected. For the particular airplane selected, this decrease amounted to 6.68% for the first mode of vibration and to 39.1% for the second.

The investigation reported in this paper was entirely theoretical and was performed during the 1943-1944 school year at the Guggenheim Aeronautics Laboratory at the California Institute of Technology, Pasadena, California under the direction and supervision of Dr. N. O. Myklestad, research associate in aeronautics at the Institute.
Higher dimensional contact topology via holomorphic disks
Creators: name: Niederkrüger, Klaus
Publisher: name: arXiv
Year: 2013
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D35

description: These notes are based on a course that took place at the Université de Nantes in June 2011 during the "Trimester on Contact and Symplectic Topology". We will explain how holomorphic curves can be used to study symplectic fillings of a given contact manifold. Our main goal consists in showing that certain contact manifolds do not admit any symplectic filling at all.
description: 58 pages, 5 figures
Geology of part of the Adelanto Hills. Report on the Geology of the Puente Hills
Creators: name: Haffner, Bernhard K.
name: Wasem, Richard
Publisher: name: California Institute of Technology
Year: 1940
Subjects: subject: limestone
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Puente Hills
subject: Adelanto Hills

description: Geology of Part of the Adelanto Hills:

The Adelanto Hills are a low range of folded limestone, situated about five miles northwest of Adelanto, California. The limestone is a dark blue finely crystalline, roughly bedded type, which has been hydrothermally altered in places to a white crystalline limestone, or to a fine grained highly altered brown limestone. The main igneous rock outcrops in the south part of the area and is a light colored, coarse grained granodiorite body that apparently has been faulted into place. A complimentary association of several fine grained, dark colored granodiorite intrusions and numerous pegmatite dikes occurs in the northern part of the area. Several large light colored acidic dikes intrude the limestone and their relationships to the other igneous rocks cannot be determined, with the exception that they are earlier than the pegmatite. The alteration of the blue limestone to the white limestone is due in part to the cutting of the area by the acid dikes. Hydrothermal solutions controlled to some extent by igneous contacts, the bedding of the blue limestone and possibly by faults, are responsible for the rest of the alteration. The area is cut by a large fault trending N65W and by numerous smaller faults trending about N2OW. The structure on either side of the main fault is roughly parallel. The mineralization of the area is mainly a contact metamorphic type, the ore minerals being lead, zinc and silver. Oxidation has resulted in some secondary enrichment, especially of silver. Some scheelite is mined at the present time from a contact zone between porphyry and limestone.

Report on the Geology of the Puente Hills:

The area mapped consists of one and two thirds square miles known as the Puente Hills. The Hills are located directly east of the town of Puente and are about fifteen miles south-east of Pasadena. The purpose of the mapping was to give a student geologist some experience in mapping and interpreting a structure of folded sediments.
Approximately ten days was spent in the field completing
the mapping. The method used was a Brunton Compass traverse with a U.S.G.S. topographic map.
The Late-Time Rebrightening of Type Ia SN 2005gj in the Mid-Infrared
Creators: name: Fox, Ori D.
name: Filippenko, Alexei V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A growing number of observations reveal a subset of Type Ia supernovae undergoing circumstellar interaction (SNe Ia-CSM). We present unpublished archival Spitzer Space Telescope data on SNe Ia-CSM 2002ic and 2005gj obtained > 1300 and 500 days post-discovery, respectively. Both SNe show evidence for late-time mid-infrared (mid-IR) emission from warm dust. The dust parameters are most consistent with a pre-existing dust shell that lies beyond the forward-shock radius, most likely radiatively heated by optical and X-ray emission continuously generated by late-time CSM interaction. In the case of SN 2005gj, the mid-IR luminosity more than doubles after 1 year post-discovery. While we are not aware of any late-time optical-wavelength observations at these epochs, we attribute this rebrightening to renewed shock interaction with a dense circumstellar shell.
description: 5 pages, 3 figures, published to ApJL. This version represents similar formatting to published version
Blockchain implementation for IoT devices, Blockchain of Things
Creators: name: Pavlović, Nikola
name: Šarac, Marko
Publisher: name: figshare
Year: 2021
Subjects: subject: 80303 Computer System Security
subject: FOS: Computer and information sciences

description: —Internet of Things and Blockchain are considered two major technologies. Internet of Things is facing many challenges such as poor interoperability, security vulnerabilities, privacy, and lack of industry standards. Most Internet of Things Devices needs a constant connection to the internet which brings many challenges in their protection and security the data. This is where Blockchain technology comes into use. The Blockchain provides decentralization and authentication that makes is impossible for third parties to gain access to the network. It provides much needed privacy and flexibility which is currently missing from IoT infrastructure. Our work provides a solution with overview what can be done to implement Blockchain in existing IoT infrastructure and furthermore improve security and privacy of the system.
Optimization of NSLS-II Blade X-ray Beam Position Monitors: from Photoemission type to Diamond Detector
Creators: name: Ilinski, Petr
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Optimization of blade type X-ray Beam Position Monitors (XBPM) was performed for NSLS-II undulator IVU20. Blade material, configuration and operation principle was analyzed to improve XBPM performance. Optimization is based on calculation of the XBPM signal spatial distribution. Along with standard photoemission blades, Diamond Detector Blade (DDB) was analyzed as XBPM signal source. Analyses revealed, that Diamond Detector Blade XBPM would allow overcoming drawbacks of the photoemission type XBPMs.
Remarks on factorization property of some stochastic integrals
Creators: name: Jurek, Zbigniew J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 60E07, 60H05, 60B11, Secondary 44A05, 60H05, 60B10

description: In the paper Sato (2006) there are introduced two families of improper random integrals and the corresponding two convolution semigroups of infinitely divisible laws on $\Rset^d$. Theorem 3.1 gives a relation (a factorization property) between those two integrals. Here, using \emph{the random integral mappings} $I^{h,r}_{(a,b]}$ (cf. the survey article Jurek (2011)), we give a simpler proof that is also valid for measures on Banach spaces. Furthermore, using our technique we establish yet other relations between those two families of improper stochastic integrals.
Electronic structures of III-V zinc-blende semiconductors from atomistic first principles
Creators: name: Wang, Yin
name: Yin, Haitao
name: Cao, Ronggen
name: Zahid, Ferdows
name: Zhu, Yu
name: Liu, Lei
name: Wang, Jian
name: Guo, Hong
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: For analyzing quantum transport in semiconductor devices, accurate electronic structures are critical for quantitative predictions. Here we report theoretical analysis of electronic structures of all III-V zinc-blende semiconductor compounds. Our calculations are from density functional theory with the semi-local exchange proposed recently [F. Tran and P. Blaha, Phys. Rev. Lett. 102, 226401 (2009)], within the linear muffin tin orbital scheme. The calculated band gaps and effective masses are compared to experimental data and good quantitative agreement is obtained. Using the theoretical scheme presented here, quantum transport in nanostructures of III-V compounds can be confidently predicted.
description: 4 pages, 2 figures
An investigation of blowing as a method of increasing the maximum lift of a double-wedge airfoil
Creators: name: Bacon, J. W.
Publisher: name: California Institute of Technology
Year: 1950
Subjects: Aeronautics

description: This report presents the results of an investigation of boundary layer energization by blowing as a method of increasing the maximum lift coefficient for supersonic airfoils operating at low subsonic speeds.

The model used was a double wedged airfoil with end plates and a spanwise slot located at the 15%, 25% or 35% chord position. Air was blown back over the wing from this slot producing a considerable increase in maximum lift for most configurations. Blowing proved to be most effective in increasing the maximum lift when used with the nose flap, fairly effective with combined flaps and wing alone, but ineffective with the split flap.
NFDI4Bioimage - TA3-Hackathon - UoC-2023 (Cologne-Hackathon-2023, GitHub repository)
Creators: name: Abdrabbou, Mohamed M.
name: Babaki, Mehrnaz
name: Boissonnet, Tom
name: Bortolomeazzi, Michele
name: Dahms, Eik
name: Fuchs, Vanessa A. F.
name: Hoevels, Moritz
name: Kandpal, Niraj
name: Möhl, Christoph
name: Moore, Joshua A.
name: Schauss, Astrid
name: Schrader, Andrea
name: Stöter, Torsten
name: Thönnißen, Julia
name: Valencia-S., Monica
name: Weil, H. Lukas
name: Wendt, Jens
name: Zentis, Peter
Publisher: name: Zenodo
Year: 2024
Subjects: OMERO
ARC
Neuroglancer
zarr
REMBI
metadata
use cases
multimodal data
hackathon
NFDI4Bioimage
DataPLANT
CECAD
CEPLAS
CRC-TRR341

description: This is the repository for documentation during the first NFDI4Bioimage - TA3-Hackathon - UoC-2023 (in short: Cologne Hackathon). Potential topics were identified in a preparatory meeting and covered with introductory talks. In a joint discussion and workflow as well as roadmap session, graphical workflows were created and tasks were defined. Eventually intensive work on the topics 'Interoperability', 'REMBI / Mapping', 'Neuroglancer (OMERO / zarr)' was conducted in groups and final reports summarized the outcome of this initial hackathon which also bridged from NFDI4Bioimage to DataPLANT on the topic of OMERO-ARC interoperability. From the beginning, there was a focus on documentation and on including use cases. The interoperability and REMBI topic served as preparatory work for a project at the 2nd de.NBI BioHackathon in Bielefeld: 'Towards OMERO and ARC interoperability for RDM-compliant bio-image data'. For the OMERO-ARC topic, we are thankful for the collaboration with DataPLANT (funded by the German Research Foundation (DFG) within the framework of the NFDI - project number: 442077441). We thank Heinrich Lukas Weil (DataPLANT) for participating and contributing as a guest, also providing the introductory talk on ARC. Furthermore, we acknowledge the contribution of Timo Mühlhaus in discussions during planning for the OMERO-ARC project and of Kevin Schneider in preparatory meetings on the OMERO-ARC project (both: DataPLANT). Funding allowing this event including enabling for organization, participation and finalizing this repository including the Zenodo submission: NFDI4Bioimage, funded by the German Research Foundation (DFG) within the framework of the NFDI-project number: 501864659; CEPLAS, Cluster of Excellence on Plant Sciences, funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy, EXC-2048/1'; CECAD, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy - EXC 2030 - 390661388; CRC TRR341, Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 456082119.
description: If you use content of this repository, please cite it using these metadata. Authors are in alphabetical order!
NFDI4Bioimage - TA3-Hackathon - UoC-2023 (Cologne-Hackathon-2023, GitHub repository)
Creators: name: Abdrabbou, Mohamed M.
name: Babaki, Mehrnaz
name: Boissonnet, Tom
name: Bortolomeazzi, Michele
name: Dahms, Eik
name: Fuchs, Vanessa A. F.
name: Hoevels, Moritz
name: Kandpal, Niraj
name: Möhl, Christoph
name: Moore, Joshua A.
name: Schauss, Astrid
name: Schrader, Andrea
name: Stöter, Torsten
name: Thönnißen, Julia
name: Valencia-Schneider, Mónica E.
name: Weil, H. Lukas
name: Wendt, Jens
name: Zentis, Peter
Publisher: name: Zenodo
Year: 2024
Subjects: OMERO
ARC
Neuroglancer
zarr
REMBI
metadata
use cases
multimodal data
hackathon
NFDI4Bioimage
DataPLANT
CECAD
CEPLAS
CRC-TRR341

description: This is the repository for documentation during the first NFDI4Bioimage - TA3-Hackathon - UoC-2023 (in short: Cologne Hackathon). Potential topics were identified in a preparatory meeting and covered with introductory talks. In a joint discussion and workflow as well as roadmap session, graphical workflows were created and tasks were defined. Eventually intensive work on the topics 'Interoperability', 'REMBI / Mapping', 'Neuroglancer (OMERO / zarr)' was conducted in groups and final reports summarized the outcome of this initial hackathon which also bridged from NFDI4Bioimage to DataPLANT on the topic of OMERO-ARC interoperability. From the beginning, there was a focus on documentation and on including use cases. The interoperability and REMBI topic served as preparatory work for a project at the 2nd de.NBI BioHackathon in Bielefeld: 'Towards OMERO and ARC interoperability for RDM-compliant bio-image data'. For the OMERO-ARC topic, we are thankful for the collaboration with DataPLANT (funded by the German Research Foundation (DFG) within the framework of the NFDI - project number: 442077441). We thank Heinrich Lukas Weil (DataPLANT) for participating and contributing as a guest, also providing the introductory talk on ARC. Furthermore, we acknowledge the contribution of Timo Mühlhaus in discussions during planning for the OMERO-ARC project and of Kevin Schneider in preparatory meetings on the OMERO-ARC project (both: DataPLANT). Funding allowing this event including enabling for organization, participation and finalizing this repository including the Zenodo submission: NFDI4Bioimage, funded by the German Research Foundation (DFG) within the framework of the NFDI-project number: 501864659; CEPLAS, Cluster of Excellence on Plant Sciences, funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy, EXC-2048/1'; CECAD, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy - EXC 2030 - 390661388; CRC TRR341, Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 456082119.
description: If you use content of this repository, please cite it using these metadata. Authors are in alphabetical order!
Roles of the scalar $f_0(500)$ and $f_0(980)$ in the process $D^0\to π^0π^0 \bar{K}^0$
Creators: name: Zhang, Xiao-Hui
name: Zhang, Han
name: Ke, Bai-Cian
name: Liu, Li-Juan
name: Li, De-Min
name: Wang, En
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Motivated by the near-threshold enhancement and the dip structure around 1~GeV in the $π^0π^0$ invariant mass distribution of the process $D^0\to π^0π^0\bar{K}^0$ observed by the CLEO Collaboration, we have investigated this process by taking into account the contribution from the $S$-wave pseudoscalar meson-pseudoscalar meson interactions within the chiral unitary approach, and also the one from the intermediate resonance $K^{*}(892)$. Our results are in good agreement with the CLEO measurements, which implies that, the near-threshold enhancement near the $π^0π^0$ threshold is mainly due to the contributions from the scalar meson $f_0(500)$ and the intermediate $K^*$, and the cusp structure around 1~GeV in the $π^0π^0$ invariant mass distribution should be associated with the scalar meson $f_0(980)$.
description: 6 pages, 5 figures
Lévy walk of pions in heavy-ion collisions
Creators: name: Kincses, Dániel
name: Nagy, Márton
name: Csanád, Máté
Publisher: name: arXiv
Year: 2024
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The process of Lévy walk, i.e., movement patterns described by heavy-tailed random walks, plays a role in various phenomena, from chemical and microbiological systems through marine predators to climate change. Recent experiments have suggested that this phenomenon also appears in heavy-ion collisions. However, the theoretical interpretation supporting such findings is still debated. In high-energy collisions of heavy nuclei, the strongly interacting Quark Gluon Plasma is created, which, similarly to the early Universe, undergoes a rapid expansion and transition back to hadronic matter. In the subsequent expanding hadron gas, particles interact until kinetic freeze-out, when their momenta stop changing, and they freely transition toward the detectors. Measuring spatial freeze-out distributions is a crucial tool in understanding the dynamics of the created matter and the interactions among its constituents. In this paper, we introduce a three-dimensional analysis of the spatial freeze-out distribution of pions (the most abundant particles in such collisions). Utilising Monte-Carlo simulations of high-energy collisions, we show that the chain of processes ending in a final state pion has a step length distribution leading to Lévy-stable distributions. Subsequently, we show that simulated pion freeze-out distributions indeed exhibit heavy tails and can be described by a three-dimensional elliptically contoured symmetric Lévy-stable distribution.
description: 23 pages, 7 figures
Leadership practices and indicators of quality, connected through internal evaluation processes in the New Zealand ECE sector
Creators: name: Marnell, Christina Egan
name: Thornton, Kathryn
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2023
Subjects: Uncategorized

description: The last few years has seen a significant increase in the attention paid to leadership in the New Zealand early childhood education (ECE) sector, particularly in guiding documents. While these provide greater clarity than previously on expectations around leadership practice, a greater understanding of what leadership means and how it is implemented in different contexts is still needed. This article is based on a study exploring how educational leadership is practised through internal evaluation processes in New Zealand ECE services, and how these practices support the professional capabilities and capacities of teachers. Previous research has highlighted that a practice approach to leadership removes the focus on the individual leader and allows leadership to emerge from collective action. The objectives of this research study were: to develop a better understanding of how educational leadership is practised through internal evaluation processes; explore what challenges or enables teachers to become involved and practise educational leadership through internal evaluation processes; and to understand how services monitor the impact of changes on teaching practice, made as a result of an internal evaluation. This qualitative research, which took the form of an interpretive case study, was framed around a single case design with multiple units of analysis. Data were gathered from three participating ECE services through interviews, focus groups and observations, and drew on the perspectives of both teachers and positional leaders. A reflexive thematic data analysis approach was employed, and four key themes were developed: identification with leadership; supportive workplace culture; continuous improvement; and effective leadership practices in ECE services. Seven effective leadership practices were also identified: relational leadership; creating the conditions for teamwork; engagement; knowledge expertise and sharing opinions; shared decision making; facilitating and guiding and accountability and organisation. This article contributes to our further understanding of educational leadership practices in New Zealand ECE services.
The PdBI Arcsecond Whirlpool Survey (PAWS). I. A Cloud-Scale/Multi-Wavelength View of the Interstellar Medium in a Grand-Design Spiral Galaxy
Creators: name: Schinnerer, Eva
name: Meidt, Sharon E.
name: Pety, Jerome
name: Hughes, Annie
name: Colombo, Dario
name: Garcia-Burillo, Santiago
name: Schuster, Karl F.
name: Dumas, Gaelle
name: Dobbs, Clare L.
name: Leroy, Adam K.
name: Kramer, Carsten
name: Thompson, Todd A.
name: Regan, Michael W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The PdBI (Plateau de Bure Interferometer) Arcsecond Whirlpool Survey (PAWS) has mapped the molecular gas in the central ~9kpc of M51 in its 12CO(1-0) line emission at cloud-scale resolution of ~40pc using both IRAM telescopes. We utilize this dataset to quantitatively characterize the relation of molecular gas (or CO emission) to other tracers of the interstellar medium (ISM), star formation and stellar populations of varying ages. Using 2-dimensional maps, a polar cross-correlation technique and pixel-by-pixel diagrams, we find: (a) that (as expected) the distribution of the molecular gas can be linked to different components of the gravitational potential, (b) evidence for a physical link between CO line emission and radio continuum that seems not to be caused by massive stars, but rather depend on the gas density, (c) a close spatial relation between the PAH and molecular gas emission, but no predictive power of PAH emission for the molecular gas mass,(d) that the I-H color map is an excellent predictor of the distribution (and to a lesser degree the brightness) of CO emission, and (e) that the impact of massive (UV-intense) young star-forming regions on the bulk of the molecular gas in central ~9kpc can not be significant due to a complex spatial relation between molecular gas and star-forming regions that ranges from co-spatial to spatially offset to absent. The last point, in particular, highlights the importance of galactic environment -- and thus the underlying gravitational potential -- for the distribution of molecular gas and star formation.
description: 52 pages, 14 figures, 2 tables, (several minor typos corrected) accepted by ApJ, high resolution version available, see http://www.mpia.de/PAWS/pub/paws_schinnerer.pdf ; for more information on PAWS, further papers and the data, see http://www.mpia.de/PAWS
Persistence of local-moment antiferromagnetic order in Ba(1-x)KxMn2As2
Creators: name: Lamsal, J.
name: Tucker, G. S.
name: Heitmann, T. W.
name: Kreyssig, A.
name: Jesche, A.
name: Pandey, Abhishek
name: Tian, Wei
name: McQueeney, R. J.
name: Johnston, D. C.
name: Goldman, A. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: BaMn2As2 is a local-moment antiferromagnetic insulator with a Néel temperature of 625 K and a large ordered moment of 3.9 Bohr magneton per Mn. Remarkably, this compound can be driven metallic by the substitution of as little as 1.6% K for Ba while retaining essentially the same ordered magnetic moment and Néel temperature, as previously reported. Here, using both powder and single crystal neutron diffraction we show that the local moment antiferromagnetic order in Ba(1-x)KxMn2As2 remains robust up to x = 0.4. The ordered moment is nearly independent of x for 0 < x < 0.4 and the Néel transition temperature decreases to 480 K at x = 0.4.
description: 5 pages, 5 figures
Assessment of Sustainable and Safe Development of Municipalities
Creators: name: H. S. Pak
name: E. V. Ushakova
name: A. A. Kuprin
Publisher: name: Zenodo
Year: 2021
Subjects: Financial stability
financial and budgetary security
municipalities
assessment of financial stability and security of municipalities

description: The article examines the financial stability of municipalities in conjunction with financial and budgetary security. The analytical base is provided by the information of the Federal State Statistics Service, the section "Municipal Statistics", the database of the Leningrad Oblast. The article proposes methodological approaches to the assessment of financial stability and security of municipalities that can be used by authorities at all levels for monitoring studies of the sustainable and safe development of municipalities. The assessment of financial stability and financial and budgetary security will offer a more representative measure of the effectiveness of municipal management. The issue of assessing the financial stability and protection of municipalities remains virtually unexplored, as its solution needs clarification of the methodological and theoretical provisions for the municipal level assessment of these categories.
The Dark Side of Galaxy Color
Creators: name: Hearin, Andrew P.
name: Watson, Douglas F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present age distribution matching, a theoretical formalism for predicting how galaxies of luminosity L and color C occupy dark matter halos. Our model supposes that there are just two fundamental properties of a halo that determine the color and brightness of the galaxy it hosts: the maximum circular velocity Vmax, and the redshift z_starve that correlates with the epoch at which the star formation in the galaxy ceases. The halo property z_starve is intended to encompass physical characteristics of halo mass assembly that may deprive the galaxy of its cold gas supply and, ultimately, quench its star formation. The new, defining feature of the model is that, at fixed luminosity, galaxy color is in monotonic correspondence with z_starve, with the larger values of z_starve being assigned redder colors. We populate an N- body simulation with a mock galaxy catalog based on age distribution matching, and show that the resulting mock galaxy distribution accurately describes a variety of galaxy statistics. Our model suggests that halo and galaxy assembly are indeed correlated. We make publicly available our low-redshift, SDSS M_r
description: One new figure; expanded discussion of HOD; conclusions unchanged; version accepted by MNRAS
Current multispectral night data sources from the orbit: The international Space Station and other sources
Creators: name: Alejandro Sánchez Miguel
Publisher: name: Zenodo
Year: 2023

description: Summary of the main current and past remote sensing multispectral experiments on orbit International Space Station, and new space missions. Updated version with SDGSAT-1 information. Presented at the event  "Meeting on Light Pollution: Challenges and Responses for Monitoring it" as part of the Spanish presidency of the European Union.
Bericht über die Tätigkeit der Gesellschaft der Freunde des Römisch-Germanischen Zentralmuseums im Jahr 1964
Creators: name: Böhner, Kurt
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2017

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 11 (1964)
The density of expected persistence diagrams and its kernel based estimation
Creators: name: Divol, Vincent
name: Chazal, Frédéric
Publisher: name: Journal of Computational Geometry
Year: 2020

description: Persistence diagrams play a fundamental role in Topological Data Analysis where they are used as topological descriptors of filtrations built on top of data. They consist in discrete multisets of points in the plane $\mathbb{R}^2$ that can equivalently be seen as discrete measures in $\mathbb{R}^2$. When the data is assumed to be random, these discrete measures become random measures whose expectation is studied in this paper. First, we show that for a wide class of filtrations, including the Čech and Vietoris-Rips filtrations, but also the sublevels of a Brownian motion, the expected persistence diagram, that is a deterministic measure on $\mathbb{R}^2$ , has a density with respect to the Lebesgue measure. Second, building on the previous result we show that the persistence surface recently introduced in Adams et al. [2017] can be seen as a kernel estimator of this density. We propose a cross-validation scheme for selecting an optimal bandwidth, which is proven to be a consistent procedure to estimate the density.
description: Journal of Computational Geometry, Vol. 10 No. 2 (2019): Special Issue of Selected Papers from SoCG 2018
Geology of a part of Seminole quadrangle, Los Angeles County, California. Geology of the Bluff Cove Region, Palos Verdes, Southern California
Creators: name: Kupfer, Donald Harry
name: Varnes, David Joseph
Publisher: name: California Institute of Technology
Year: 1940
Subjects: subject: Seminole quadrangle
subject: Malibu Lake
subject: Topanga Formation
subject: Modelo shales
subject: Modelo sandstones
subject: Central Santa Monica Mountains
subject: Geology
subject: FOS: Earth and related environmental sciences

description:  Geology of a part of Seminole quadrangle, Los Angeles County, California:

A small area in the Central Santa Monica Mountains was mapped. Two formations, a series of interbedded basalts and pyroelastics of Topanga age and some Modelo shales and sandstones, were mapped and an angular unconformity was found between them. The region is one of broad folds with axes trending generally east-west.

Geology of the Bluff Cove Region, Palos Verdes, Southern California:

About two miles of sea cliffs were examined at the west end of the Palos Verdes Hills, in southern California. Middle and lower upper Miocene breccia, sandstone, and shale have been intruded by sills of basalt. Faulting and minor folding have taken place since the intrusion. Successive terraces indicate repeated uplift in Pleistocene time.
The effect of floating rings on the stability of longitudinally stiffened cylinders in axial compression
Creators: name: Sullivan, Timothy Lay
Publisher: name: California Institute of Technology
Year: 1961
Subjects: Aeronautics

description: An experimental investigation was conducted to determine the effect of floating rings on the stability of longitudinally stiffened, thin-walled cylinders in axial compression. Mylar and Plexiglas were used as the skin and stiffening materials, respectively. The primary objectives of the investigation were: (1) to determine the increase in buckling stress that could be obtained by the addition of floating rings; (2) to determine the ring stiffness required for the maximum cylinder strength; (3) to determine what effect the number of longitudinal stiffeners had on the ability of the rings to increase the buckling stress; and (4) to examine the mechanism of buckling in the various ring-stringer combinations. A strength-weight analysis was also made.

The addition of rings was found to be very effective in increasing the cylinder buckling load when 24 longitudinal stiffeners were used. The addition of three rings to a cylinder with 24 longitudinal stiffeners increased the buckling load 123 per cent with only a 20 per cent increase in weight. The ring stiffness beyond which there was no more increase in cylinder buckling strength was determined for the 24 stringer, two and three ring configurations. The ability of a ring to increase the buckling stress was markedly decreased when the number of longitudinal stiffeners was decreased from 24 to 12. The mechanism of buckling was also affected by the number of rings and longitudinal stiffeners.

In the light of the experimental results, two analytical methods are suggested for predicting the buckling stress of floating ring stiffened cylinders.
ИСПОЛЬЗОВАНИЕ ФУНКЦИОНАЛИЗИРОВАННЫХ МИКРОЭЛЕКТРОДОВ В РАЗРАБОТКЕ НЕЙРОИНТЕРФЕЙСА, ВЗАИМОДЕЙСТВУЮЩЕГО С ОТДЕЛЬНЫМИ НЕЙРОНАМИ
Creators: name: Малышев Е.
name: Носов Г.
name: Усатова В.
name: Воробьев А.
name: Дудик С.
name: Джэппи Д.
name: Можаров А.
name: Мухин И.
name: Басманов Д.
name: Белоусов В.
Publisher: name: Нейротехнологии будущего: тезисы участников конференции «Нейрокампус 2022: старт!» (04–07 сентября 2022 г.)
Year: 2022
Subjects: микроэлектроды
полиэтилен-диокситиофен/полистиролсульфонат

description: Для длительной регистрации активности отдельных нейронов требуется использование биосовместимых микроэлектродов маленького размера с низким импедансом. В нашей работе предложена технология снижения импеданса с помощью осаждения PEDOT, а для повышения биосовместимости — функционализация поверхности белками синаптической адгезии.
Top Partner Probes of Extended Higgs Sectors
Creators: name: Kearney, John
name: Pierce, Aaron
name: Thaler, Jesse
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Natural theories of the weak scale often include fermionic partners of the top quark. If the electroweak symmetry breaking sector contains scalars beyond a single Higgs doublet, then top partners can have sizable branching ratios to these extended Higgs sector states. In fact, top partner decays may provide the most promising discovery mode for such scalars, especially given the large backgrounds to direct and associated production. In this paper, we present a search strategy for top partner decays to a charged Higgs boson and a bottom quark, focusing on the case where the charged Higgs dominantly decays to third-generation quarks to yield a multi-b final state. We also discuss ways to extend this search to exotic neutral scalars decaying to bottom quark pairs.
description: 21 pages, 7 figures; v3: includes projections for LHC with L = 3000 fb^{-1}
The geometric dilation of three points
Creators: name: Ebbers-Baumann, Annette
name: Klein, Rolf
name: Knauer, Christian
name: Rote, Günter
Publisher: name: Journal of Computational Geometry
Year: 2019

description: Given three points in the plane, we construct the plane geometric network of smallest geometric dilation that connects them. The geometric dilation of a plane network is defined as the maximum dilation (distance along the network divided by Euclidean distance) between any two points on its edges. We show that the optimum network is either a line segment, a Steiner tree, or a curve consisting of two straight edges and a segment of a logarithmic spiral.
description: Journal of Computational Geometry, Vol. 10 No. 1 (2019)