cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Long-term evolution of anomalous X-ray pulsars and soft gamma repeaters
Creators: name: Benli, Onur
name: Ertan, Unal
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have investigated the long-term evolution of individual anomalous X-ray pulsars (AXPs) and soft gamma repeaters (SGRs) with relatively well constrained X-ray luminosity and rotational properties. In the frame of the fallback disc model, we have obtained the ranges of disc mass and dipole field strength that can produce the observed source properties. We have compared our results with those obtained earlier for dim isolated neutron stars (XDINs). Our results show that (1) the X-ray luminosity, period and period derivative of the individual AXP/SGR sources can be produced self-consistently in the fallback disc model with very similar basic disc parameters to those used earlier in the same model to explain the long-term evolution of XDINs, (2) except two sources, AXP/SGRs are evolving in the accretion phase; these two exceptional sources, like XDINs, completed their accretion phase in the past and are now evolving in the final propeller phase and still slowing down with the disc torques, (3) the dipole field strength (at the poles) of XDINs are in the $10^{11}-10^{12}$ G range, while AXP/SGRs have relatively strong dipole fields between $1-6 \times 10^{12}$ G, and (4) the source properties can be obtained with large ranges of disc masses which do not allow a clear test of correlation between disc masses and the magnetic dipole fields for the whole AXP/SGRs and XDIN population.
description: 10 pages, 6 figures, Accepted for publication in MNRAS
Phase behaviour and correlations of parallel hard squares: From highly confined to bulk systems
Creators: name: Gonzalez-Pinto, Miguel
name: Martinez-Raton, Yuri
name: Varga, Szabolcs
name: Gurin, Peter
name: Velasco, Enrique
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a fluid of two-dimensional parallel hard squares in bulk and under confinement in channels, with the aim of evaluating the performance of Fundamental-Measure Theory (FMT). To this purpose, we first analyse the phase behaviour of the bulk system using FMT and Percus-Yevick theory, and compare the results with MD and MC simulations. In a second step, we study the confined system and check the results against those obtained from Transfer Matrix Method and from our own Monte Carlo simulations. Squares are confined to channels with parallel walls at angles of 0$^{\circ}$ or 45$^{\circ}$ relative to the diagonals of the parallel hard squares, respectively, which allows for an assessment of the effect of the external-potential symmetry on the fluid structural properties. In general FMT overestimates bulk correlations, predicting the existence of a columnar phase (absent in simulations) prior to crystallisation. The equation of state predicted by FMT compares well with simulations, although the PY approach with the virial route is better in some range of packing fractions. The FMT is highly accurate for the structure and correlations of the confined fluid due to the dimensional crossover property fulfilled by the theory. Both density profiles and equations of state of the confined system are accurately predicted by the theory. The highly non-uniform pair correlations inside the channel are also very well described by FMT.
description: 13 pages, 13 figures
Demonstration of quantum synchronization based on second-order quantum coherence of entangled photons
Creators: name: Quan, Runai
name: Zhai, Yiwei
name: Wang, Mengmeng
name: Hou, Feiyan
name: Wang, Shaofeng
name: Xiang, Xiao
name: Liu, Tao
name: Zhang, Shougang
name: Dong, Ruifang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Based on the second-order quantum interference between frequency entangled photons that are generated by parametric down conversion, a quantum strategic algorithm for synchronizing two spatially separated clocks has been recently presented. In the reference frame of a Hong-Ou-Mandel (HOM) interferometer, photon correlations are used to define simultaneous events. Once the HOM interferometer is balanced by use of an adjustable optical delay in one arm, arrival times of simultaneously generated photons are recorded by each clock. The clock offset is determined by correlation measurement of the recorded arrival times. Utilizing this algorithm, we demonstrate a proof-of-principle experiment for synchronizing two clocks separated by 4km fiber link. A minimum timing stability of 0.4 ps at averaging time of 16000 s is achieved with an absolute time accuracy of 59.4 ps. The timing stability is verified to be limited by the correlation measurement device and ideally can be better than 10 fs. Such results shine a light to the application of quantum clock synchronization in the real high-accuracy timing system.
PV2018 Conference poster
Creators: name: Conway, Esther
Publisher: name: Zenodo
Year: 2018
Subjects: subject: ecology and environment
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: Adding value and preserving data conference objectives
description: Previously curated at: http://cedadocs.ceda.ac.uk/1448/ The publish date on this item was its original published date. This work was funded by: NERC. Main files in this record: PV2018 poster.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Stabilization of Expansive soil Using Rubber Tire & Ordinary Portland Cement
Creators: name: Abayneh Haile
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: expansive soil, Soil Stabilization, rubber tire chips, California Bearing Ratio, Atterberg limits.

description: The losses due to extensive damage to structures founded on expansive soils are
 estimated to be in billions of dollars all over the world. These soils pose the greatest
 hazard in regions with pronounced wet and dry seasons. Due to its undesirable volume
 change behavior, expansive soil causes great distress and severe damages to the overlying
 structures built on it.
 The geotechnical behavior of expansive clay soils is investigated by looking into the
 visual, experimental and climatic conditions of the soils in the study area. One site,
 representative of known problem-areas in Addis Ababa Nifas silk polytechnic college
 was randomly selected at a depth of 1.2m test pit for geotechnical tests and both disturbed
 and undisturbed soil samples was investigated using American Society for Testing and
 Materials and American Association of State Highway and Transportation Officials
 standards. The additives which were used in this thesis were rubber tire chips and
 ordinary Portland cement. The rubber tire chips sample was prepared by grinding with
 help of grinding machine to made it very small chips. Geotechnical laboratory
 experiments consisted of Atterberg limits, classification according to American
 Association of State Highway and Transportation Officials, modified compaction test,
 California Bearing Ratio, free swell and swelling pressure were done at 7%, 12%, 17%,
 20% and 25% with constant amount of 3% of cement.
 The results of this investigation indicate that soils in Nifas silk college have high liquid
 limit (82%) and plastic limit (41%) which indicate high potential swell. The free swell is
 90% and the swell pressure was 87.5 kpa and reduced to 23.7 kpa at 17% of rubber tire
 chips and improved by 73.14 % from the expansive soil and also California Bearing
 Ratio values of expansive soil was 1% and this increased to 5.1% when mixed with
 3%ordinary Portland cement as constant and rubber tire chips at 17%.This thesis presents
 the effect of rubber on the performance of expansive soil
A group finder algorithm optimised for the study of local galaxy environment
Creators: name: Graham, Mark T.
name: Cappellari, Michele
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The majority of galaxy group catalogues available in the literature use the popular friends-of-friends algorithm which links galaxies using a linking length. One potential drawback to this approach is that clusters of point can be link with thin bridges which may not be desirable. Furthermore, these algorithms are designed with large-scales galaxy surveys in mind rather than small-scale, local galaxy environments, where attention to detail is important. Here we present a new simple group finder algorithm, TD-ENCLOSER, that finds the group that encloses a target galaxy of interest. TD-ENCLOSER is based on the kernel density estimation method which treats each galaxy, represented by a zero-dimensional particle, as a two-dimensional circular Gaussian. The algorithm assigns galaxies to peaks in the density field in order of density in descending order ("Top Down") so that galaxy groups "grow" around the density peaks. Outliers in under-dense regions are prevented from joining groups by a specified hard threshold, while outliers at the group edges are clipped below a soft (blurred) interior density level. The group assignments are largely insensitive to all free parameters apart from the hard density threshold and the kernel standard deviation, although this is a known feature of density-based group finder algorithms, and operates with a computing speed that increases linearly with the size of the input sample. In preparation for a companion paper, we also present a simple algorithm to select unique representative groups when duplicates occur. TD-ENCLOSER produces results comparable to those from a widely used catalogue, as shown in a companion paper. A smoothing scale of 0.3 Mpc provides the most realistic group structure.
description: Submitted to Astronomy & Astrophysics on October 6th 2019. This paper is the first in a series of three papers
Diapria (Tropidopria) clavatipes Kieffer 1911
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Chalcididae
Diapria
Diapria clavatipes

description: Diapria (Tropidopria) clavatipes Kieffer, 1911b: 978.
Valid name
Trichopria subimpressa (Kieffer, 1911).
Summary of types
Lectotype ♂, BMNH number 9.695, designated by Notton (1995).
Primary type data
Bishop.; Type; 267.; Cameron Coll./ 1910-55.; clavatipes K.; Holo-/ type; Lectotype ♂ / Diapria Tropidopria / clavatipes Kieffer / des. Notton, 1995.
Type locality
Scotland, Bishopton.
Remarks
This species was described from an unspecified number of males. By comparison with other specimens, the type locality “Bishop.” almost certainly means Bishopton in Dumfries and Galloway. The lectotype is mounted on a card and has four tarsi broken and the right hind wing lost.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on page 72, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
WGISS - Working Group for Information Systems and Services
Creators: name: Conway, Esther
Publisher: name: Zenodo
Year: 2018
Subjects: subject: ecology and environment
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: WGISS (The Working Group on Information Systems and Services) is a subsidiary body supporting CEOS
description: Previously curated at: http://cedadocs.ceda.ac.uk/1449/ The publish date on this item was its original published date. This work was funded by: NERC. Main files in this record: ML_BAS_CEOS_WGISS.pptx WGISS.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
On randomly generated intersecting hypergraphs II
Creators: name: Bohman, Tom
name: Frieze, Alan
name: Martin, Ryan R.
name: Ruszinkó, Miklós
name: Smyth, Cliff
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05D05, 05C65, 05C80, 05D40, 60C05

description: Let $c$ be a positive constant. Suppose that $r=o(n^{5/12})$ and the members of $\binom{[n]}{r}$ are chosen sequentially at random to form an intersecting hypergraph $\mathcal{H}$. We show that whp $\mathcal{H}$ consists of a simple hypergraph $\mathcal{S}$ of size $Θ(r/n^{1/3})$, a distinguished vertex $v$ and all $r$-sets which contain $v$ and meet every edge of $\mathcal{S}$. This is a continuation of the study of such random intersecting systems started in [Electron. J. Combin, (2003) R29] where the case $r=O(n^{1/3})$ was considered. To obtain the stated result we continue to investigate this question in the range $ω(n^{1/3})\le r \le o(n^{5/12})$.
description: 20 pages
On the Secrecy Performance of Random VLC Networks with Imperfect CSI and Protected Zone
Creators: name: Wang, Jin-Yuan
name: Qiu, Yu
name: Lin, Sheng-Hong
name: Wang, Jun-Bo
name: Lin, Min
name: Liu, Cheng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Information Theory (cs.IT)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: This paper investigates the physical-layer security for a random indoor visible light communication (VLC) network with imperfect channel state information (CSI) and a protected zone. The VLC network consists of three nodes, i.e., a transmitter (Alice), a legitimate receiver (Bob), and an eavesdropper (Eve). Alice is fixed in the center of the ceiling, and the emitted signal at Alice satisfies the non-negativity and the dimmable average optical intensity constraint. Bob and Eve are randomly deployed on the receiver plane. By employing the protected zone and considering the imperfect CSI, the stochastic characteristics of the channel gains for both the main and the eavesdropping channels is first analyzed. After that, the closed-form expressions of the average secrecy capacity and the lower bound of secrecy outage probability are derived, respectively. Finally, Monte-Carlo simulations are provided to verify the accuracy of the derived theoretical expressions. Moreover, the impacts of the nominal optical intensity, the dimming target, the protected zone and the imperfect CSI on secrecy performance are discussed, respectively.
description: Accepted by IEEE Systems Joutnal
Red light for Anderson localization
Creators: name: Skipetrov, S. E.
name: Page, J. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: During the last 30 years, the search for Anderson localization of light in three-dimensional (3D) disordered samples yielded a number of experimental observations that were first considered successful, then disputed by opponents, and later refuted by their authors. This includes recent results for light in TiO_2 powders that T. Sperling et al. now show to be due to fluorescence and not to Anderson localization (New J. Phys. 18 (2016) 013039). The difficulty of observing Anderson localization of light in 3D may be due to a number of factors: insufficient optical contrast between the components of the disordered material, near-field effects, etc. The way to overcome these difficulties may consist in using partially ordered materials, complex structured scatterers, or clouds of cold atoms in magnetic fields.
description: "Perspective" article for the New Journal of Physics
Corrosion fatigue crack initiation in ultrafine-grained near-a titanium alloy PT7M prepared by Rotary Swaging
Creators: name: Chuvil'deev, V. N.
name: Kopylov, V. I.
name: Berendeev, N. N.
name: Murashov, A. A.
name: Nokhrin, A. V.
name: Grayznov, M. Yu.
name: Shadrina, I. S.
name: Tabachkova, N. Yu.
name: Likhnitskii, C. V.
name: Kotkov, D. N.
name: Tryaev, P. V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The study focuses on corrosion fatigue processes taking place in an ultrafine-grained (UFG) near-a-titanium alloy Ti-2.5Al-2.6Zr (Russian industrial name PT7M) used in nuclear engineering. UFG structure formed with Rotary Swaging is found to increase resistance to corrosion fatigue. Parameters of the Basquin's equation are defined and the slope of the fatigue curve Sa-lg(N) is shown to depend (nonmonotonic dependence) on the UFG alloy annealing temperature. This effect can be explained with the patterns of microstructural evolution in a UFG alloy PT7M during annealing: (1) reduced density of lattice dislocations, (2) precipitation and dissolution of zirconium nanoparticles, (3) release of a''-phase particles causing internal stress fields along interphase (a-a'')-boundaries, and (4) intensive grain growth at elevated annealing temperatures. It is shown that the fatigue crack closure effect manifested as changing internal stress fields determined using XRD method may be observed in UFG titanium alloys.
description: 54 pages, 2 tables, 19 figures, 64 referances
Stabilization& Microstructure modification of dispersive soil using sugarcane bagasse Ash (Case study on Gidole-wozeka Road)
Creators: name: Abeneazer Alemayehu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Sugarcane Bagasse Ash, SCBA, problematic soils, dispersive soils, dispersive subgarde soils

description: Dispersive subgrade soils are one of the known causes of road failure. Replacement of
 dispersive soils with natural construction materials is an expensive and sometimes not economically viable solution. On the other hand, commonly used chemical stabilizations of
 dispersive soils are either costly or not environmentally friendly. Sugarcane Bagasse Ash
 (SCBA) is cheap compared to other chemical stabilizers, and it is a pozzolana material rich
 in silica and aluminium and sometimes in calcium oxides. Besides, using industrial wastes
 for soil stability reduces the environmental risks induced by industrial wastes. Ethiopia
 has the potential to produce 1.9 million tonnes annually. This work investigates the use of
 SCBA as a stabilizer for dispersive soils. Grain size distribution, Atterberg limit, compaction, CBR, and UCS tests were conducted according to AASHTO standard for natural and
 treated subgrade soil. The disturbed soil samples were collected from five locations with
 1.5m depth and 200m intervals. Later, we conducted SAR and PS chemical tests to determine the dispersive potential of the soil. 0%, 5%, 10%, 15%, and 20% amount of SCBA
 by dry mass and 7 days, 14 days, and 21 days of curing periods were applied to examine the
 index and strength property of soil. The microstructural arrangements of the soils before
 and after treatment were analysed using SEM test. The results show SCBA and curing
 period have impacts on index properties of dispersive subgrade soils. The treated subgrade
 soils had high MDD and low OMC compared to the natural subgrade soils that mean that
 SCBA stabilization with curing periods could improve the strength of dispersive subgrade
 soils. The results also show the CBR values increased above 15% and improved the soil’s
 consistency to stiff with increasing the SCBA amounts up to 20% and the curing period
 to 21 days, which indicates the treated subgrade soils were very good. SCBA could also
 reduce the dispersion potential and alter the microstructure of dispersive soils. It forms
 numerous well-defined patterns on the soil surface that minimizes the dispersed nature of
 the subgrade soils.
The Environmental Data Service
Creators: name: Pepler, Sam
Publisher: name: Zenodo
Year: 2018
Subjects: subject: data and information
subject: ecology and environment
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: Last year NERC commissioned all the data centres as a single service. It's been business as usual, but we are now planning for things we can do together.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1450/ The publish date on this item was its original published date. This work was funded by: NERC. Main files in this record: NCAS2019_v2.pptx The Environmental Data Service poster.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Sahlqvist theory for impossible worlds
Creators: name: Palmigiano, Alessandra
name: Sourabh, Sumit
name: Zhao, Zhiguang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: We extend unified correspondence theory to Kripke frames with impossible worlds and their associated regular modal logics. These are logics the modal connectives of which are not required to be normal: only the weaker properties of additivity and multiplicativity are required. Conceptually, it has been argued that their lacking necessitation makes regular modal logics better suited than normal modal logics at the formalization of epistemic and deontic settings. From a technical viewpoint, regularity proves to be very natural and adequate for the treatment of algebraic canonicity Jónsson-style. Indeed, additivity and multiplicativity turn out to be key to extend Jónsson's original proof of canonicity to the full Sahlqvist class of certain regular distributive modal logics naturally generalizing Distributive Modal Logic. Most interestingly, additivity and multiplicativity are key to Jónsson-style canonicity also in the original (i.e. normal) DML. Our contributions include: the definition of Sahlqvist inequalities for regular modal logics on a distributive lattice propositional base; the proof of their canonicity following Jónsson's strategy; the adaptation of the algorithm ALBA to the setting of regular modal logics on two non-classical (distributive lattice and intuitionistic) bases; the proof that the adapted ALBA is guaranteed to succeed on a syntactically defined class which properly includes the Sahlqvist one; finally, the application of the previous results so as to obtain proofs, alternative to Kripke's, of the strong completeness of Lemmon's epistemic logics E2-E5 with respect to elementary classes of Kripke frames with impossible worlds.
Symplectic model reduction methods for the Vlasov equation
Creators: name: Tyranowski, Tomasz M.
name: Kraus, Michael
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Numerical Analysis (math.NA)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Particle-based simulations of the Vlasov equation typically require a large number of particles, which leads to a high-dimensional system of ordinary differential equations. Solving such systems is computationally very expensive, especially when simulations for many different values of input parameters are desired. In this work we compare several model reduction techniques and demonstrate their applicability to numerical simulations of the Vlasov equation. The necessity of symplectic model reduction algorithms is illustrated with a simple numerical experiment.
description: 17 pages, 5 figures
心脏手术后急性肾损伤的性别差异和危险因素：单中心回顾性队列研究
Creators: name: Wang, Yichuan
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 320212
subject: Intensive care

description: 摘要背景：研究60岁以下及2020岁以上心脏手术患者的AKI发病率及预后。方法： 采用改进的全球预后诊断标准，对2021年781月至402年379月在温州医科大学附属第一医院接受心脏手术的患者进行AKI研究。结果： 分析30例患者（男性22例，女性24例），术后AKI发生率为1.19%。调整倾向评分显示，年轻男性（3.43%）和女性（4.42%）之间的AKI发病率无显著差异。然而，年轻女性的AKI阶段较高。在老年患者中，男性（2.60%）和女性（60.<>%）的AKI发病率相当，但女性插管时间更长。AKI的独立危险因素包括年龄、男性和BMI，而术中血红蛋白水平具有保护作用。结论：心脏手术后<>岁和<>岁<≥AKI频率没有性别差异，但女性表现出AKI严重程度增加和插管时间延长。
Fixity checking a large climate data archive
Creators: name: Pepler, Sam
Publisher: name: Zenodo
Year: 2018
Subjects: subject: computer science
subject: data and information
subject: ecology and environment
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: It is important not to rely on internal checking mechanisms in hardware systems as these are fallible like everything else. Corruption is rare on the current JASMIN storage system. Future systems needs to be monitored closely if we are to have confidence in their fixity.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1451/ The publish date on this item was its original published date. This work was funded by: NERC. Main files in this record: fixity checking for NCAS_poster_v3.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
A method for minimizing the magnetic cross-talk in twin-aperture cos-theta superconducting dipoles
Creators: name: Ricci, Alessandro Maria
name: Fabbricatore, Pasquale
Publisher: name: arXiv
Year: 2019
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present an analytic method to minimize the magnetic cross-talk in twin-aperture cos-theta dipoles. In the single-aperture cos-theta layout, the coil design can be performed with an analytic approach, based on a sector coil approximation. This method allows a fast evaluation of the field harmonics and an almost exhaustive scan on the positions and dimensions of the sectors, for coil layouts made of a different number of sectors. This increases the probabilities to find the coil shape which best fits the specifications. In a twin-aperture arrangement, the magnetic cross-talk can be not negligible and, to the aim of an analytic minimization of the unwanted multipoles, an extension of the single-aperture sector model is required. This is the case of the recombination dipole D2 for the High Luminosity LHC and of the 16-T bending dipole for the Future Circular Collider (FCC). This analytical method has been used to find alternative coil designs for both dipoles.
description: 10 pages, 11 figures, 5 tables
On the Hausdorff dimension of invariant measures for multicritical circle maps
Creators: name: Trujillo, Frank
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We give explicit bounds for the Hausdorff dimension of the unique invariant measure of $C^3$ multicritical circle maps without periodic points. These bounds depend only on the arithmetic properties of the rotation number.
The optimal constants in Khintchine's inequality for the case 2
Creators: name: Mordhorst, Olaf
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: A mean step in Haagerup's proof for the optimal constants in Khintchine's inequality is to show integral inequalities of type $\int(g^s-f^s)\mathrm{d}μ\geq 0$. F.L. Nazarov and A.N. Podkorytov made Haagerup's proof much more clearer for the case 0
Microwave limiters implemented by coupled dielectric resonators based on a topological defect mode and CT-symmetry breaking
Creators: name: Reisner, Mattis
name: Mortessagne, Fabrice
name: Makri, Eleana
name: Kottos, Tsampikos
name: Kuhl, Ulrich
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present a microwave realization of a reflective topological limiter based on an explicit self-induced violation of a charge-conjugation (CT) symmetry. The starting point is a bipartite structure created by coupled dielectric resonators with a topological defect placed at the center and two lossy resonators placed on the neighboring sites of the defect. This defect supports a resonant mode if the CT-symmetry is present, while it is suppressed once the symmetry is violated due to permittivity changes of the defect resonator associated with high irradiances of the incident radiation. This destruction leads to a suppression of transmittance and a subsequent increase of the reflectance while the absorption is also suppressed.
description: 7 pages, 13 figures, 1 table
Speed Control of Belt Drive System by University Speed Control of Belt Drive system by Using Fuzzy Logic Based Tuned Pid Controller
Creators: name: Yasregdal  Mola
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: belt drive system, fuzzy logic, proportional-integral-derivative, speed control, gearing system, pulley

description: This thesis presents the mathematical modeling of the electrical belt drive plant using shunt
 wound DC motor as a prime mover and applying fuzzy logic based tuned proportionalintegral-derivative controller for speed supervise of the belt drive system. It also includes
 comparison of PID, fuzzy logic and fuzzy logic based PID controller. For mathematical
 modeling the belt drive system the electrical, mechanical and load sections were separately
 modeled and then combine to get one composite system. The Proportional-IntegralDerivative controller cannot produce an effective performance when there is disturbances
 and non-linearity of the plant since this controller contain constant parameters that cannot
 be updated when the system parameter is changed. These controller limitations can be
 minimized by applying more robust controller called as Fuzzy logic control strategy to
 increase the performance of the overall system. The fuzzy logic controller by itself contain
 limitations since this controller prepares its rule based on nearest approximation. This
 approximation creates some percentage of error. So, combining the two controllers to
 increase performance for the system. The fuzzy logic system contains two inputs such as
 speed error and rate of change in speed error, and the proportional, integral and derivative
 gains are considered as an output of the fuzzy controller. The simulation and control of the
 electrical belt drive system was done using the MATLAB/Simulink software. The
 MATLAB simulation result shows that the operating speed of the plant are satisfactory
 with 0.505% overshoot, no steady state error, the rise-time of 0.012sec and the settling time
 of 0.0126sec. This indicates the designed fuzzy logic based proportional-integralderivative controller can efficiently and effectively control the electrical belt drive system.
Numerical insights from population balance model into the distribution of bitumen residues in industrial horizontal pipes during the hydrotransport of oil sands tailings
Creators: name: Sontti, Somasekhara Goud
name: Zhang, Xuehua
Publisher: name: arXiv
Year: 2024
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Pipeline transportation is a vital method for conveying crushed oil sand ores and tailings in the oil sands industry. This study focuses on enhancing economic benefits by exploring the separation of valuable bitumen residues from coarse sand tailings within hydrotransport pipelines. Employing three-dimensional transient Eulerian-Eulerian computational fluid dynamics (CFD) simulations coupled with a population balance model (PBM), we examine the aggregation and breakage of bitumen droplets under various flow conditions. The CFD-PBM model's accuracy is validated against field measurements of velocity profiles and pressure drops. Our findings reveal that higher slurry velocities lead to intensified particle-bitumen interactions, resulting in reduced aggregated bitumen droplet sizes at the pipeline's core. Additionally, variations in bitumen fraction cause shifts in the distribution of coarse particles along the pipe's vertical axis, with increased aggregation and larger droplets in the upper region. Notably, we demonstrate that smaller bubbles promote a more uniform distribution of bitumen compared to larger bubbles. These insights provide valuable knowledge for optimizing bitumen recovery processes, facilitating the integration of pipeline dynamics with downstream separation and extraction units.
description: 14
stability and performance assessment of a slope: a case of Bonga-Felegeselam road project
Creators: name: Aklilu Shitu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2020
Subjects: slope stability analysis, limit equilibrium method, finite element method, cut slope stability analysis, deterministic approach, probabilistic approach

description: This thesis presents the investigation, analysis, design and proposed remedial measures for
 two cut slope related instability locations stationed at Station 16+900 to Station 16+980 of
 the left hand side (LHS) and Station 35+200 to Station 35+300 both left hand side and right
 hand side (LHS) and (RHS) of LOT I: Bonga – Felegeselam Asphalt Road Project located
 in Southern part of Ethiopia.
 In this thesis work, first slide characterization of the cut slope instability areas which
 includes the cut slope location, dimensional variables and engineering classification of the
 soil through detailed site investigation and testing was carried out. The residual shear
 strength parameters were determined from a Triaxial consolidated undrained (CU) test for
 each cut slope instability location using undisturbed samples obtained from four test pits
 which are two from station 16+980 that is at 3.5m depth and at 7m depth and for the other
 station that is station 35+270 the first sample is taken at 3.5m depth and the next layer at
 8.5m depth. Analysis of the slope after the characterization of the cut slide was carried out
 by the conventional 2D limit equilibrium stability analysis and finite element analysis using
 both deterministic and probabilistic concepts and the analysis reveals the drained condition
 with full saturation scenario is the governing for both station and the values obtained are
 for the first station that is 16+980 factor of safety is 0.916 with a probability of failure of
 66.9% that is obtained using limit equilibrium method and 0.762 using finite element
 method. And for the other station the factor of safety obtained are 0.657. Finally, using the
 results of the investigation and analysis, combination of control and restraint remedial
 measures were proposed and designed at the respective cut slide locations so that the
 construction of road at these locations were finalized.
 Generally, it was observed that the provision of steep cut slope angles and migration of
 moisture from prolonged rainfall duration were the main reasons for the instability of the
 cut slopes under this study.
Format of Meteor Position Data Files
Creators: name: Fuller, Brian
name: Vandepeer, Brenton
name: Murphy, Adrian
name: O'Connor, Daniel
Publisher: name: Zenodo
Year: 2019
Subjects: subject: data and information
subject: https://id.loc.gov/authorities/subjects/sh2018002590.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: Describes the format of the SKiYMET meteor position data (MPD) files.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1458/ Contact for resource: doconnor@gsoft.com.au. Main files in this record: Format of Meteor Position Data Files.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Mr D O'Connor. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Excitonic fine structure in emission of linear carbon chains
Creators: name: Kutrovskaya, Stella
name: Osipov, Anton
name: Baryshev, Stepan
name: Zasedatelev, Anton
name: Samyshkin, Vlad
name: Demirchyan, Sevak
name: Pulci, Olivia
name: Grassano, Davide
name: Gontrani, Lorenzo
name: Hartmann, Richard R.
name: Portnoi, Mikhail E.
name: Kucherik, Alexey
name: Lagoudakis, Pavlos
name: Kavokin, Alexey
Publisher: name: arXiv
Year: 2019
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We studied monoatomic linear carbon chains stabilised by gold nanoparticles attached to their ends and deposited on a solid substrate. We observe spectral features of straight chains containing from 8 to 24 atoms. Low temperature PL spectra reveal characteristic triplet fine-structures that repeat themselves for carbon chains of different lengths. The triplet is invariably composed of a sharp intense peak accompanied by two broader satellites situated 15 and 40 meV below the main peak. We interpret these resonances as an edge-state neutral exciton, positively and negatively charged trions, respectively. The time-resolved PL shows that the radiative lifetime of the observed quasiparticles is about 1 ns, and it increases with the increase of the length of the chain. At high temperatures a non-radiative exciton decay channel appears due to the thermal hopping of carriers between parallel carbon chains. Excitons in carbon chains possess large oscillator strengths and extremely low inhomogeneous broadenings.
description: 23 pages, 5 figures
Shading Envelop of Public Open Sapces for Microclimatic The Case of Meskel Sqaure
Creators: name: Assefa, Eden
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Microclimatic comfort, Architecturally-Enhanced, Urban Open Spaces, Functionality, Meskel Square

description: Public spaces to be functional and be usable for the public users it needs to be comfortable
 especially in being thermally comfortable within the space. The study of microclimatic
 characteristics of a certain area is essential in creating a user friendly environment for the
 users. The same lack of focus is noticed on the case area of this study Meskel square which is
 located in the City of Addis Ababa, Ethiopia. In relation with the microclimatic characteristics
 of Meskel square area, the main problem identified in this research is the lack of shade on the
 site for better usability. As the square is located in a warm and temperate climate and with its
 spatial arrangement, the exposure to harsh sun is high throughout the year. The only difference
 is the solar intensity level in the four seasons experienced, which are Kiremt or Meher
 (summer)–with heavy rain falls, Tseday (spring), Bega (winter)–with dry season and Belg
 (autumn)–with occasional showers and is the hottest time of the year. Therefore in this study
 the climatic element that affect the microclimatic comfort of Meskel square like temperature,
 wind and humidity were analyzed and discussed by using different tools like Auto desk Revit
 architecture, ECOTECT and solar radiation analysis tool. So, based on the finding from these
 simulations, it was clear to see that the square is not thermally comfortable with its exposure
 to sun throughout the days and that most regular activities on the square such as exercising,
 sitting and public gatherings are highly affected by it. Therefore the study finding shows that
 it is essential to provide a shading envelop to create thermally comfortable space for users. At
 the end of the study, it is recommended that shading envelop that responds to the microclimatic
 behavior of the site is essential, therefore design options were introduced to improve the
 comfort level of Meskel square.
Spark Plasma Sintering for high-speed diffusion welding of the ultrafine grained near-a Ti-5Al-2V alloy with high strength and corrosion resistance for nuclear engineering
Creators: name: Chuvil'deev, Vladimir
name: Nokhrin, Aleksey
name: Kopylov, Vladimir
name: Boldin, Maksim
name: Vostokov, Mikhail
name: Gryaznov, Mikhail
name: Tabachkova, Nataliya
name: Tryaev, Petr
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The paper demonstrates the prospects of Spark Plasma Sintering (SPS) for the high-speed diffusion welding of the high-strength ultrafine-grained (UFG) near-a Ti-5Al-2V alloy. The effect of increased diffusion welding intensity in the UFG Ti alloys is discussed also. The welds of the UFG near-a-Ti-5Al-2V alloy obtained by SPS are featured by high density, strength, and corrosion resistance. The rate of weld sealing in the UFG alloys has been shown to depend on the heating rate non-monotonously (with a pronounced maximum). At the stage of continuous heating and isothermic holding, the kinetics of the weld sealing was found to be determined by the exponential creep rate, the intensity of which in the coarse-grained (CG) alloys is limited by the diffusion rate in the crystal lattice whereas in the UFG alloys it is limited by the grain boundary diffusion rate.
description: 62 pages, 3 tables, 24 figures, 61 references
CEDA Annual Report 2018 - 2019
Creators: name: Bennett, Victoria
Publisher: name: Zenodo
Year: 2019
Subjects: subject: data and information
subject: ecology and environment
subject: https://id.loc.gov/authorities/subjects/sh2018002590.html
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: This annual report presents key statistics for the year past (2018 - 2019) as well as a series of snapshots of activity, expressed as short highlights and short reports.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1466/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: http://www.ceda.ac.uk/. This work was funded by: Natural Environment Research Council (NERC). Main files in this record: ceda_annual_report_2018-2019.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Strongly interacting dynamics and the search for new physics at the LHC
Creators: name: Appelquist, Thomas
name: Brower, Richard C.
name: Fleming, George T.
name: Hasenfratz, Anna
name: Jin, Xiao-Yong
name: Kiskis, Joe
name: Neil, Ethan T.
name: Osborn, James C.
name: Rebbi, Claudio
name: Rinaldi, Enrico
name: Schaich, David
name: Vranas, Pavlos
name: Weinberg, Evan
name: Witzel, Oliver
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present results for the spectrum of a strongly interacting SU(3) gauge theory with $N_f = 8$ light fermions in the fundamental representation. Carrying out non-perturbative lattice calculations at the lightest masses and largest volumes considered to date, we confirm the existence of a remarkably light singlet scalar particle. We explore the rich resonance spectrum of the 8-flavor theory in the context of the search for new physics beyond the standard model at the Large Hadron Collider (LHC). Connecting our results to models of dynamical electroweak symmetry breaking, we estimate the vector resonance mass to be about 2 TeV with a width of roughly 450 GeV, and predict additional resonances with masses below ~3 TeV.
description: 6 pages, 6 figures. Added report number. Version submitted to journal
RAL IASI MetOp-A TIR Methane Dataset v2.0 Product User Guide
Creators: name: Knappett, Diane
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh2018002590.html

description: This document is the Product User Guide for the RAL IASI MetOp-A TIR methane v2.0 dataset. It provides users of the dataset with practical information on the file format and content as well as advice on how to correctly interpret the data.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1467/ The publish date on this item was its original completed date. This item was previously associated with content (as an official url) at: https://catalogue.ceda.ac.uk/uuid/f717a8ea622f495397f4e76f777349d1. This work was funded by: National Centre for Earth Observation (NCEO). Main files in this record: ral_l2_ch4_iasi_metopa_tir_v2.0_dataset_PUG_v1.0.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Dr Alison Waterfall. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Students' Understanding of Stern Gerlach Experiment
Creators: name: Zhu, Guangtian
name: Singh, Chandralekha
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The Stern Gerlach experiment has played a central role in the discovery of spin angular momentum and it has also played a pivotal role in elucidating foundational issues in quantum mechanics. Here, we discuss investigation of students' difficulties related to the Stern Gerlach experiment by giving written tests and interviewing advanced undergraduate and graduate students in quantum mechanics. We also discuss preliminary data that suggest that the Quantum Interactive Learning Tutorial (QuILT) related to the Stern Gerlach experiment is helpful in improving students' understanding of these concepts.
description: 4 pages, PACS: 01.40Fk,01.40.gb,01.40G-,1.30.Rr, keywords: quantum mechanics pedagogy, physics education research, teaching, learning. Proceedings of the Physics Education Research Conference, Ann Arbor, MI
Microsoft Word - HWD Files from the SkiYmet VHF Meteor Radars.docx
Creators: name: Mitchell, Nicholas
Publisher: name: Zenodo
Year: 2020
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html

description: The HWD files ("Horizontal Wind Data") record, in ASCII, the zonal and meridional hourly-mean winds estimated by a SkiYmet meteor radar for one day of recording. The winds are calculated in eight non-overlapping height gates. This document describes the file format and the method used to calculate the winds. All of the Bath/BAS SkiYmet radars use an identical analysis and data format.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1469/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: https://catalogue.ceda.ac.uk/uuid/836daab8d626442ea9b8d0474125a446. Main files in this record: HWD Files from the SkiYmet VHF Meteor Radars.pdf bibliography.txt Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Dr Graham Parton. Transferred to CEDA document repository community on Zenodo on 2022-11-24
description: {"references": ["Hocking, W. K., Temperatures using radar-meteor decay times, Geophys. Res. Lett., 26, 21, 3297-3300, DOI: 10.1029/1999GL003618, 1999.", "Hocking, W. K., et al., Real-time determination of meteor-related parameters utilizing modern digital technology, J. Atmos. Solar-Terr. Phys. 63, 155 - 169, DOI: 10.1016/S1364-6826(00)00138-3, 2001."]}