cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design & Modeling of An AGC for Hydropower Plant using Neuro -Fuzzy controller
Creators: name: Tilahun Weldcherkos
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Adaptive Neuro-Fuzzy Inference System (ANFIS), Area control error (ACE), Automatic Generation control (AGC), FL control, Hybrid Optimization techniques, PID Control

description: Power system operation and demands are never steady and they continually vary with day to day.
 The conventional frequency deviation on the far side bound limits will directly impact on grid
 operation and system dependability. This thesis has presented modeling of AGC of hydropower
 plants and comparative study of Proportional-Integral-Derivative (PID) control, Fuzzy Logic
 Control (FLC) and Adaptive-Neuro-Fuzzy Inference system (ANFIS) Controller. The proposed
 Adaptive Neuro-Fuzzy controller was trained from input-output data of the Fuzzy logic controller.
 The ANFIS model has been used hybrid learning algorithm (forward and backward pass), which
 has included the Least Square Method (LSM) and back propagation based on gradient descent
 (BPA). The PID controller, fuzzy logic controller and ANFIS have been investigated using
 MATLAB Simulink Model. The response of Automatic Generation Control (AGC) in hydropower
 plants (in double area and self-supported area) with step load changes had discussed. The
 simulation results have showed that the Adaptive Neuro-Fuzzy Inference (ANFIS) Controller,
 Fuzzy Logic controller and Conventional Proportional-Integral Derivative Controller’s overshoot
 was observed that 1.31%, 13.065% and 24.375%, respectively.
 The settling time for Adaptive Neuro Fuzzy Inference System (ANFIS), Fuzzy Logic Control,
 (FLC) and PID Control were 11.616.59 sec. 48.465 sec. and 90.542 sec., respectively. The
 simulation results have showed that the ANFIS controller had a better performance compared to
 the PID Controller as well as the Fuzzy Logic controller. This is evidence that, designing and
 modeling of an Adaptive Neuro-Fuzzy Inference System controller helps to speed up the
 performance of Hydropower plants of AGC. The ANFIS control is not only improved the
 performance of the Hydropower plant, but also made the fuzzy logic system less depend on the
 expert system and also reduce the cost of the system by reducing the memory size of the system
 which is directly related to the number of Membership functions. In this work, the membership
 function is reduced from five to three which means reduce the memory size and also the cost is
 decreased
Supporting healthy ageing for people with intellectual disabilities in group homes: Staff experiences
Creators: name: Araten-Bergman, Tal
name: Bigby, Christine
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 4409
subject: Social work
classificationCode: 3202
subject: Clinical sciences
classificationCode: 4203
subject: Health services and systems
classificationCode: 44
subject: Human society

description: Background: This study explores the perceptions of supported accommodation staff and their managers of the support needs of residents ageing with intellectual disabilities, and their experiences of adjusting services for this group in the context of individualised funding. Method: Qualitative interviews were conducted with 21 staff working in Australian supported accommodation services. Findings: Four themes emerged. The first captured the staff’s limited understanding of ageing and the medicalisation of support needs. The second identified staff practices and adjustments to service provision to facilitate residents’ healthy ageing. The third described staff commitment to facilitating ageing residents to age in place, and the fourth identified staff challenges and opportunities in supporting ageing residents in the context of the National Disability Insurance Scheme (NDIS). Conclusions: Findings may inform the development of practice guidelines and training for supported accommodation staff, protocols for intersections between disability, aged care and health sectors, and adequate policy responses to support older residents’ healthy ageing.
Training food researchers in open science: A series of interactive workshops.
Creators: name: Reis, Sofia F.
name: Mayor, Luis
name: Knöbl, Christoph F.
name: Flynn, Katherine M.
Publisher: name: Zenodo
Year: 2023
Subjects: Open data
repositories
FNS-Cloud
train-the-trainer

description: A train-the-trainer program was organized and focused on introducing open science principles and practices and the use of FNS-Cloud. Three series of interactive workshops on open science took place from April 2021 and July 2023. Attendance was mostly food science technologists and nutritionists due to the nature of FNS-Cloud project. The series of workshops in 2021 showed that more than 80% of participants produced research data, and almost 29% had searched for data in an open repository, however only 17% had uploaded data to an open repository. Most participants had positive comments when asked “What comes to your mind with open science, open data, open publishing?” but the biggest obstacle to making data open was identified as being their lack of understanding. The overall ratings of the workshops were mostly very and extremely helpful (82-90%) and the favorite parts of participants were the interactive activities, discussions, role-playing exercises, and hands-on activities. Participants feedback reflected that they were motivated to learn more about open science and FNS-Cloud and teach others about what they have learned.
Non-homogeneous Behaviour of the Spatial Distribution of Macrospicules
Creators: name: Gyenge, N.
name: Bennett, S.
name: Erdélyi, R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper the longitudinal and latitudinal spatial distribution of macrospicules is examined. We found a statistical relationship between the active longitude determined by sunspot groups and the longitudinal distribution of macrospicules. This distribution of macrospicules shows an inhomogeneity and non-axysimmetrical behaviour in the time interval from June $2010$ until December $2012$ covered by observations of the Solar Dynamic Observatory (SDO) satellite. The enhanced positions of the activity and its time variation has been calculated. The migration of the longitudinal distribution of macrospicules shows a similar behaviour as that of the sunspot groups.
SAT-Based Subsumption Resolution
Creators: name: Coutelier, Robin
name: Kovács, Laura
name: Rawson, Michael
name: Rath, Jakob
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Subsumption resolution is an expensive but highly effective simplifying inference for first-order saturation theorem provers. We present a new SAT-based reasoning technique for subsumption resolution, without requiring radical changes to the underlying saturation algorithm. We implemented our work in the theorem prover Vampire, and show that it is noticeably faster than the state of the art.
Distributed Algorithms, the Lovász Local Lemma, and Descriptive Combinatorics
Creators: name: Bernshteyn, Anton
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Logic (math.LO)
subject: FOS: Mathematics

description: In this paper we consider coloring problems on graphs and other combinatorial structures on standard Borel spaces. Our goal is to obtain sufficient conditions under which such colorings can be made well-behaved in the sense of topology or measure. To this end, we show that such well-behaved colorings can be produced using certain powerful techniques from finite combinatorics and computer science. First, we prove that efficient distributed coloring algorithms (on finite graphs) yield well-behaved colorings of Borel graphs of bounded degree; roughly speaking, deterministic algorithms produce Borel colorings, while randomized algorithms give measurable and Baire-measurable colorings. Second, we establish measurable and Baire-measurable versions of the Symmetric Lovász Local Lemma (under the assumption $\mathsf{p}(\mathsf{d}+1)^8 \leq 2^{-15}$, which is stronger than the standard LLL assumption $\mathsf{p}(\mathsf{d} + 1) \leq e^{-1}$ but still sufficient for many applications). From these general results, we derive a number of consequences in descriptive combinatorics and ergodic theory.
description: 37 pp
Comparative study on the Bearing capacity of Uniform & Tapered Piles under vertical load
Creators: name: Nurshassen Rhmato
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Cluster meshing, Stratified layer, Tapered angle, driven pile, Bearing Capacity

description: In this research, the bearing capacity of uniform and tapered piles under static vertical load were
 analyzed and compared to each other. The study focused on the parameters of tapered angles, soil
 layers, and methods of installation. An attempt was done by taking twelve models that were
 investigated and analyzed using ABAQUS 3D software. The mechanical behaviors of the soil were
 described by the Mohr-Coulomb model. Pile element and soil parts were simulated by 8 node
 element mesh type and Cluster meshing, 10-node triangular elements were used around the borehole
 to simulate the hole. The boundary of the soil was restricted by radial direction and vertical
 constraint. Numerical results showed that vertical bearing capacity increases rapidly when pile
 taper angle changed from 0 to 1.6 degrees with the same length and volume. The percent increase in
 bearing capacity for piles of the same length and volume ranges from 7-10.49%. The study also
 showed that the load-carrying capacity of driven installed tapered piles in sand soil were higher
 than that of bored piles with the same volume and average diameter. The load-settlement curve
 showed that the tapered piles displayed a suffer response than the straight piles in all loading stages
 and this behavior was more evident at the higher settlement values. When increasing the taper
 angle, stress also increases in the toe of the pile, so the rate of created tensions in the soil around the
 toe of piles also increases. From this study it can be concluded that the tapered piles have more
 performance for pile foundations in several respects and also have a better resistance to use in areas
 where there is no access to the bedrock beneath the soils and have different strata
An Enduring Rapidly Moving Storm as a Guide to Saturn's Equatorial Jet's Complex Structure
Creators: name: Sánchez-Lavega, A.
name: García-Melendo, E.
name: Perez-Hoyos, S.
name: Hueso, R.
name: Wong, M. H.
name: Simon, A.
name: Sanz-Requena, J. F.
name: Antuñano, A.
name: Barrado-Izagirre, N.
name: Garate-Lopez, I.
name: Rojas, J. F.
name: Gaztelurrutia, T. del Rio
name: Gómez-Forrellad, J. M.
name: de Pater, I.
name: Li, L.
name: Barry, T.
name: contributors, PVOL
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Saturn has an intense and broad eastward equatorial jet with a complex three-dimensional structure mixed with time variability. The equatorial region experiences strong seasonal insolation variations enhanced by ring shadowing and three of the six known giant planetary-scale storms have developed in it. These factors make Saturn's equator a natural laboratory to test models of jets in giant planets. Here we report on a bright equatorial atmospheric feature imaged in 2015 that moved steadily at a high speed of 450 ms-1 not measured since 1980-81 with other equatorial clouds moving within an ample range of velocities. Radiative transfer models show that these motions occur at three altitude levels within the upper haze and clouds. We find that the peak of the jet (latitudes 10\degree N to 10\degree S) suffers intense vertical shears reaching +2.5 ms-1 km-1, two orders of magnitude higher than meridional shears, and temporal variability above 1 bar altitude level.
Microwave Photonic Imaging Radar with a Millimeter-level Resolution
Creators: name: Ma, Cong
name: Yang, Yue
name: Liu, Ce
name: Fan, Beichen
name: Ye, Xingwei
name: Zhang, Yamei
name: Wang, Xiangchuan
name: Pan, Shilong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Microwave photonic radars enable fast or even real-time high-resolution imaging thanks to its broad bandwidth. Nevertheless, the frequency range of the radars usually overlaps with other existed radio-frequency (RF) applications, and only a centimeter-level imaging resolution has been reported, making them insufficient for civilian applications. Here, we propose a microwave photonic imaging radar with a millimeter-level resolution by introducing a frequency-stepped chirp signal based on an optical frequency shifting loop. As compared with the conventional linear-frequency modulated (LFM) signal, the frequency-stepped chirp signal can bring the system excellent capability of anti-interference. In an experiment, a frequency-stepped chirp signal with a total bandwidth of 18.2 GHz (16.9 to 35.1 GHz) is generated. Postprocessing the radar echo, radar imaging with a two-dimensional imaging resolution of ~8.5 mm$\times$~8.3 mm is achieved. An auto-regressive algorithm is used to reconstruct the disturbed signal when a frequency interference exists, and the high-resolution imaging is sustained.
History dependence of the magnetic properties of single-crystal Fe$_{1-x}$Co$_{x}$Si
Creators: name: Bauer, Andreas
name: Garst, Markus
name: Pfleiderer, Christian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the magnetization, ac susceptibility, and specific heat of optically float-zoned single crystals of Fe$_{1-x}$Co$_{x}$Si, $0.20 \leq x \leq 0.50$. We determine the magnetic phase diagrams for all major crystallographic directions and cooling histories. After zero-field cooling, the phase diagrams resemble that of the archetypal stoichiometric cubic chiral magnet MnSi. Besides the helical and conical state, we observe a pocket of skyrmion lattice phase just below the helimagnetic ordering temperature. At the phase boundaries between these states evidence for slow dynamics is observed. When the sample is cooled in small magnetic fields, the phase pocket of skyrmion lattice may persist metastably down to lowest temperatures. Taken together with the large variation of the transition temperatures, transition fields, and the helix wavelength as a function of composition, this hysteresis identifies Fe$_{1-x}$Co$_{x}$Si as an ideal material for future experiments exploring, for instance, the topological unwinding of the skyrmion lattice.
description: 14 pages, 11 figures
Climate Responsive Architecture Mitigations Concerning The Impact of Temperature Rise on Thermal Comfort The Case of Curtain Wall Enveloped commercial Building in Bole Addis Ababa
Creators: name: Fekadu, Hilary
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: ECOTECT, Thermal discomfort, Ethiopian building code, Overheating

description: Climate responsive architecture understands the character of the climate to design buildings
 in response to the space occupants' comfort zone. In the current state of Bole, Addis Ababa the
 commercial buildings are designed and built as the main attainable goal for efficient space
 utilization and with curtain wall which signifies a modernity image in respect to an economic
 and political status like the western countries. This is with prior negligence of the basic
 principles of designing for thermal comfort. Curtain wall enveloped commercial buildings, in
 the city can be observed being overheated and not ventilated in the right manner. In the state
 of that, the objective of this research is to identify the thermal discomfort level of curtain wall
 enveloped buildings to recognize appropriate climate-responsive design approaches. In this
 research, curtain wall enveloped commercial buildings are studied with the use of case-based
 research methodology. Four case buildings: Getu commercial building, Hailegebriel building,
 TK building, and Mulugeta Zeleke building, from Bole, Addis Ababa, are selected to conduct
 a whole year simulation with ECOTECT and HAP software of the building sun path and heat
 energy exposure and an onsite measurement to identify the level of discomfort through
 psychometric charts according to the standards stated on ASHARE 55. Getu commercial
 building was identified to be the most discomfort able building both from the onsite
 measurements and simulation results due to full curtain wall side orientation towards the west.
 Then following Hailegeriel building, Tk building and lastly Mulugeta Zeleke building was
 found to be discomfort able building by the cause of temperature rise. Different parameters
 such as building orientation, building form and height, building fenestration, building fabric,
 and shading systems were identified and discussed in the consciousness of the climate of Addis
 Ababa and thermal comfort. An additional discomfort simulation analysis was done with a full
 curtain wall enveloped building model with sun breakers to get a very lower discomfort level
 than the previous simulation results. So finally in conscious consideration of climate responsive
 parameters for thermal comfort, envelop design guidelines are recommended to the building
 code of Ethiopia.
Variational Monte Carlo method for the Baeriswyl wavefunction: application to the one-dimensional bosonic Hubbard model
Creators: name: Hetényi, B.
name: Tanatar, B.
name: Martelo, L. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: A variational Monte Carlo method for bosonic lattice models is introduced. The method is based on the Baeriswyl projected wavefunction. The Baeriswyl wavefunction consists of a kinetic energy based projection applied to the wavefunction at infinite interaction, and is related to the shadow wavefunction already used in the study of continuous models of bosons. The wavefunction at infinite interaction, and the projector, are represented in coordinate space, leading to an expression for expectation values which can be evaluated via Monte Carlo sampling. We calculate the phase diagram and other properties of the bosonic Hubbard model. The calculated phase diagram is in excellent agreement with known quantum Monte Carlo results. We also analyze correlation functions.
description: minor changes compared to previous version
Quantum erasing of laser emission in N$_2^+$
Creators: name: Danylo, Rostyslav
name: Lambert, Guillaume
name: Liu, Yi
name: Tikhonchuk, Vladimir
name: Houard, Aurélien
name: Mysyrowicz, André
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Cavity-free lasing of N$_2^+$ induced by a femtosecond laser pulse at 800~nm is nearly totally suppressed by a delayed twin pump pulse. We explain this surprising effect within the V-scheme of lasing without population inversion. A fast transfer of population between nitrogen ionic states X$^2Σ_g^+$ and A$^2Π_u$, induced by the second pulse, terminates the conditions for amplification in the system. Appearance of short lasing bursts at delays corresponding to revivals of rotational wave packets are explained along the same lines.
Learned SPARCOM: Unfolded Deep Super-Resolution Microscopy
Creators: name: Dardikman-Yoffe, Gili
name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The use of photo-activated fluorescent molecules to create long sequences of low emitter-density diffraction-limited images enables high-precision emitter localization, but at the cost of low temporal resolution. We suggest combining SPARCOM, a recent high-performing classical method, with model-based deep learning, using the algorithm unfolding approach, to design a compact neural network incorporating domain knowledge. Our results show that we can obtain super-resolution imaging from a small number of high emitter density frames without knowledge of the optical system and across different test sets using the proposed learned SPARCOM (LSPARCOM) network. We believe LSPARCOM can pave the way to interpretable, efficient live-cell imaging in many settings, and find broad use in single-molecule localization microscopy of biological structures.
From the first stars to the first black holes
Creators: name: Valiante, Rosa
name: Schneider, Raffaella
name: Volonteri, Marta
name: Omukai, Kazuyuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The growth of the first super massive black holes (SMBHs) at z > 6 is still a major challenge for theoretical models. If it starts from black hole (BH) remnants of Population III stars (light seeds with mass ~ 100 Msun) it requires super-Eddington accretion. An alternative route is to start from heavy seeds formed by the direct collapse of gas onto a ~ 10^5 Msun BH. Here we investigate the relative role of light and heavy seeds as BH progenitors of the first SMBHs. We use the cosmological, data constrained semi-analytic model GAMETE/QSOdust to simulate several independent merger histories of z > 6 quasars. Using physically motivated prescriptions to form light and heavy seeds in the progenitor galaxies, we find that the formation of a few heavy seeds (between 3 and 30 in our reference model) enables the Eddington-limited growth of SMBHs at z > 6. This conclusion depends sensitively on the interplay between chemical, radiative and mechanical feedback effects, which easily erase the conditions that allow the suppression of gas cooling in the low metallicity gas (Z < Zcr and JLW > Jcr). We find that heavy seeds can not form if dust cooling triggers gas fragmentation above a critical dust-to-gas mass ratio (D > Dcr). In addition, the relative importance of light and heavy seeds depends on the adopted mass range for light seeds, as this dramatically affects the history of cold gas along the merger tree, by both SN and AGN-driven winds.
description: 16 pages, 13 figures, accepted for publication in MNRAS
[B.4.05.b.5.] Le Soleil partira
Creators: name: L'Humanité (Périodique)
Publisher: name: École des Hautes Études en Sciences Sociales; Éditions de l'Humanité
Year: 2023
Subjects: http://www.idref.fr/027416593/id
http://www.idref.fr/027280470/id
http://www.idref.fr/050613995/id
http://www.idref.fr/03470499X/id
http://www.idref.fr/027261468/id

Abstract
Adaptive Channel-Matched Detection for C-Band 64-Gbit/s Optical OOK System over 100-km Dispersion-Uncompensated Link
Creators: name: Wang, Haide
name: Zhou, Ji
name: Guo, Dong
name: Feng, Yuanhua
name: Liu, Weiping
name: Yu, Changyuan
name: Li, Zhaohui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In this paper, we propose adaptive channel-matched detection (ACMD) for C-band 64-Gbit/s intensity-modulation and direct-detection (IM/DD) optical on-off keying (OOK) system over a 100-km dispersion-uncompensated link. The proposed ACMD can adaptively compensate most of the link distortions based on channel and noise characteristics, which includes a polynomial nonlinear equalizer (PNLE), a decision feedback equalizer (DFE) and maximum likelihood sequence estimation (MLSE). Based on the channel characteristics, PNLE eliminates the linear and nonlinear distortions, while the followed DFE compensates the spectral nulls caused by chromatic dispersion. Finally, based on the noise characteristics, a post filter can whiten the noise for implementing optimal signal detection using MLSE. To the best of our knowledge, we present a record C-band 64-Gbit/s IM/DD optical OOK system over a 100 km dispersion-uncompensated link achieving 7\% hard-decision forward error correction limit using only the proposed ACMD at the receiver side. In conclusion, ACMD-based C-band 64-Gbit/s optical OOK system shows great potential for future optical interconnects.
description: Under review of Journal of Lightwave Techonlogy
Room-temperature paramagnetoelectric effect in magnetoelectric multiferroics Pb(Fe1/2Nb1/2)O3 and its solid solution with PbTiO3
Creators: name: Laguta, V. V.
name: Morozovska, A. N.
name: Eliseev, E. A.
name: Raevski, I. P.
name: Raevskaya, S. I.
name: Sitalo, E. I.
name: Prosandeev, S. A.
name: Bellaiche, L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have observed the magnetoelectric response at room temperature and above in high-resistive ceramics made of multiferroic Pb(Fe1/2Nb1/2)O3 (PFN) and PFN-based solid solution 0.91PFN-0.09PbTiO3 (PFN-PT). The value of the paramagnetoelectric (PME) coefficient shows a pronounced maximum near the ferroelectric-to-paraelectric phase transition temperature, T_C, and then decreases sharply to zero for T>T_C. The maximal PME coefficient in PFN is about 4x10(-18) s/A. The theoretical description of the PME effect, within the framework of a Landau theory of phase transitions allowing for realistic temperature dependences of spontaneous polarization, dielectric and magnetic susceptibilities, qualitatively reproduces well the temperature dependence of the PME coefficient. In particular, the Landau theory predicts the significant increase of the PME effect at low temperatures and near the temperature of the paraelectric-to-ferroelectric phase transition, since the PME coefficient is equal to the product of the spontaneous polarization, dielectric permittivity, square of magnetic susceptibility and the coefficient quantifying the strength of the biquadratic magnetoelectric coupling
Lepton mixing patterns from combinations of elementary correlations
Creators: name: Rong, Shu-jun
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent data of reactor neutrino experiments set more stringent constraint on leptonic mixing patterns. We examine all possible patterns on the basis of combinations of elementary correlations of elements of leptonic mixing matrix. we obtain 62 viable mixing patters at 3$σ$ level of mixing parameters. Most of these patterns can be paired via the μ- interchange which changes the octant of $θ_{23}$ and the sign of $\cosδ$. All viable patterns can be classified into two groups: the perturbative patterns and non-perturbative patterns. The former can be obtained from perturbing TBM. The latter cannot be obtained from perturbing any mixing pattern whose $θ_{13}$ is zero. Different predictions of Dirac CP phase $δ$ of these two types of mixing patterns are discussed. Evolutions of mass matrices of neutrinos with small mixing parameters are discussed via special mixing patterns on the basis of flavor groups. In general cases, a small variation of $\sinθ_{13}$ may bring about large modifications to alignment of vacuum expectation values in a mixing model. Therefore, small but nonzero $\sinθ_{13}$ brings a severer challenge to leptonic mixing models on the basis of flavor groups than usual views.
description: 29pages, 5 figures
Lossless reshaping of structured light
Creators: name: Scholes, Stirling
name: Rodríguez-Fajardo, Valeria
name: Forbes, Andrew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Structured light concerns the control of light in its spatial degrees of freedom (amplitude, phase and polarization), and has proven instrumental in many applications. The creation of structured light usually involves the conversion of a Gaussian mode to a desired structure in a single step, while the detection is often the reverse process, both fundamentally lossy or imperfect. Here we show how to ideally reshape structured light in a lossless manner in a simple two-step process. We outline the core theoretical arguments, and demonstrate reshaping of arbitrary structured light patterns, in the process highlighting when the technique is applicable and when not, and how best to implement it. This work will be a useful addition to the structured light toolkit, and particularly relevant to those wishing to use the spatial modes of light as a basis in classical and quantum communication.
The Second-Generation Shifted Boundary Method and Its Numerical Analysis
Creators: name: Atallah, Nabil M.
name: Canuto, Claudio
name: Scovazzi, Guglielmo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 65N30, 65N12, 65N50

description: Recently, the Shifted Boundary Method (SBM) was proposed within the class of unfitted (or immersed, or embedded) finite element methods. By reformulating the original boundary value problem over a surrogate (approximate) computational domain, the SBM avoids integration over cut cells and the associated problematic issues regarding numerical stability and matrix conditioning. Accuracy is maintained by modifying the original boundary conditions using Taylor expansions. Hence the name of the method, that {\it shifts} the location and values of the boundary conditions. In this article, we present enhanced variational SBM formulations for the Poisson and Stokes problems with improved flexibility and robustness. These simplified variational forms allow to relax some of the assumptions required by the mathematical proofs of stability and convergence of earlier implementations. First, we show that these new SBM implementations can be proved asymptotically stable and convergent even without the rather restrictive assumption that the inner product between the normals to the true and surrogate boundaries is positive. Second, we show that it is not necessary to introduce a stabilization term involving the tangential derivatives of the solution at Dirichlet boundaries, therefore avoiding the calibration of an additional stabilization parameter. Finally, we prove enhanced $L^{2}$-estimates without the cumbersome assumption - of earlier proofs - that the surrogate domain is convex. Instead we rely on a conventional assumption that the boundary of the true domain is smooth, which can also be replaced by requiring convexity of the true domain. The aforementioned improvements open the way to a more general and efficient implementation of the Shifted Boundary Method, particularly in complex three-dimensional geometries. We present numerical experiments in two and three dimensions.
description: 28 pages, 6 figures, 4 tables
Influence of defect thickness on the angular dependence of coercivity in rare-earth permanent magnets
Creators: name: Bance, Simon
name: Oezelt, Harald
name: Schrefl, Thomas
name: Ciuta, Georgeta
name: Dempsey, Nora M.
name: Givord, Dominique
name: Winklhofer, Michael
name: Hrkac, Gino
name: Zimanyi, Gergely
name: Gutfleisch, Oliver
name: Woodcock, Thomas G.
name: Shoji, Tetsuya
name: Yano, Masao
name: Kato, Akira
name: Manabe, Akira
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences
subject: 82D40

description: The coercive field and angular dependence of the coercive field of single-grain Nd$_{2}$Fe$_{14}$B permanent magnets are computed using finite element micromagnetics. It is shown that the thickness of surface defects plays a critical role in determining the reversal process. For small defect thicknesses reversal is heavily driven by nucleation, whereas with increasing defect thickness domain wall de-pinning becomes more important. This change results in an observable shift between two well-known behavioral models. A similar trend is observed in experimental measurements of bulk samples, where a Nd-Cu infiltration process has been used to enhance coercivity by modifying the grain boundaries. When account is taken of the imperfect grain alignment of real magnets, the single-grain computed results appears to closely match experimental behaviour.
Loxotropa semirufa Kieffer 1912
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Loxotropa
Loxotropa semirufa

description: Loxotropa semirufa Kieffer, 1912a: 70.
Valid name
Basalys semirufus (Kieffer, 1912).
Summary of types
Holotype ♂, BMNH number 9.739, by monotypy.
Primary type data
19/ Silhouette, ‘08/ Seychelles Exp.; Loxotropa / semirufa/ J.J.Kieffer/ type; Type; Type / H.T.; Seychelle Islands./ Percy Sladen Trust/ Expedition./ 1913-170.
Type locality
Seychelles, Silhouette, Mare aux Cochons.
Remarks
The holotype agrees well with the description, although it is somewhat faded. It is mounted on a card and is missing its right wings.
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 76, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
SPOD and resolvent analysis of near-wall coherent structures in turbulent pipe flows
Creators: name: Abreu, Leandra
name: Cavalieri, André
name: Schlatter, Philipp
name: Vinuesa, Ricardo
name: Henningson, Dan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Direct numerical simulations, performed with a high-order spectral-element method, are used to study coherent structures in turbulent pipe flow at friction Reynolds numbers $Re_τ = 180$ and $550$. The database was analysed using spectral proper orthogonal decomposition (SPOD) to identify energetically dominant coherent structures, most of which turn out to be streaks and quasi-streamwise vortices. To understand how such structures can be modelled, the linear flow responses to harmonic forcing were computed using the singular value decomposition of the resolvent operator, using the mean field as a base flow. The SPOD and resolvent analysis were calculated for several combinations of frequencies and wavenumbers, allowing to map out the similarities between SPOD modes and optimal responses for a wide range of relevant scales in turbulent pipe flows. In order to explore physical reasons behind the agreement between both methods, an indicator of lift-up mechanism in the resolvent analysis was introduced, activated when optimal forcing represents quasi-streamwise vortices and associated response corresponds to streaks. Good agreement between leading SPOD and resolvent modes is observed in a large region of parameter space. In this region, a significant gain separation is found in resolvent analysis, which may be attributed to the strong amplification associated with the lift-up mechanism. For both Reynolds numbers, the observed concordances were generally for structures with large energy in the buffer layer. The results highlight resolvent analysis as a pertinent reduced-order model for coherent structures in wall-bounded turbulence, particularly for streamwise elongated structures corresponding to near-wall streamwise vortices and streaks.
description: 20 pages, 11 figures, presented in the Eleventh International Symposium on Turbulence and Shear Flow Phenomena (TSFP11)
Characterization of Hot Mix Asphalt by Using Fly Ash As Mineral Filler
Creators: name: Alazare Getnet
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Fly ash, crushed rock dust, marshal mix design, Hot Mix asphalt, optimum filler content

description: Hot Mix Asphalt consists of coarse aggregate, fine aggregate, filler and bitumen in
 an optimized proportion according to specifications. Among these constituents, the
 filler material plays a crucial role in filling the voids between aggregates particles
 and pores in the aggregate. Different researches tried to maximize the benefit of this
 material with less cost. Consequently, recycling waste materials and using industry
 bi-products in asphalt road construction has become a common practice to enhance
 the performance of the pavement. This study was intended to examine Fly ash, one of
 industries bi-product by replacing the conventional filler in hot mix asphalt. To do
 so, as per Asphalt Institute MS-2 samples have been prepared with two sample sizes;
 one a control mix using crushed rock dust as a filler and the other is a mix using fly
 ash as filler at different percentage ranging from 2% to 8% of the total weight of
 aggregate. A total of 87 samples have been prepared to conduct Marshal test which
 had aimed to find the OBC of the control mix and then to evaluate marshal properties
 of the fly ash filler asphalt mix at this bitumen content and to examine the marshal
 properties of the mix along different filler contents (2%-8%) and bitumen content
 (4% to 6% at 0.5% raise).
 The Marshal Test results has shown that at OBC of the conventional mix (i.e.5.3%)
 increasing the fly ash filler content from 2% to 8% by 2% raise decrease the void in
 the mix and increase the stability of the mix. However other parameters show a slight
 change. During a marshal test of the mix at varying bitumen content it has been
 noted 4% and 6% of fly ash filler content from the total weight of aggregate had
 marshal properties in the required specification. And from the two filler contents
 considering stability and flow value 4% fly ash filler content has been chosen as an
 optimum filler replacement content which results a better strength and permanent
 deformation resistance with a less optimum bitumen content (5.2%) than the control
 mix (5.3%). As a result in order to ensure economically feasible raw material
 replacement with a bi-product cost comparison has been checked and results using
 the referred fly ash filler content results a 13% cost reduction than using the same
 filler content of crushed rock dust filler asphalt mix
The influence of radiative core growth on coronal X-ray emission from pre-main sequence stars
Creators: name: Gregory, Scott G.
name: Adams, Fred C.
name: Davies, Claire L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Pre-main sequence (PMS) stars of mass $\gtrsim0.35\,{\rm M}_\odot$ transition from hosting fully convective interiors to configurations with a radiative core and outer convective envelope during their gravitational contraction. This stellar structure change influences the external magnetic field topology and, as we demonstrate herein, affects the coronal X-ray emission as a stellar analog of the solar tachocline develops. We have combined archival X-ray, spectroscopic, and photometric data for $\sim$1000 PMS stars from five of the best studied star forming regions; the ONC, NGC 2264, IC 348, NGC 2362, and NGC 6530. Using a modern, PMS calibrated, spectral type-to-effective temperature and intrinsic colour scale, we deredden the photometry using colours appropriate for each spectral type, and determine the stellar mass, age, and internal structure consistently for the entire sample. We find that PMS stars on Henyey tracks have, on average, lower fractional X-ray luminosities ($L_{\rm X}/L_\ast$) than those on Hayashi tracks, where this effect is driven by changes in $L_{\rm X}$. X-ray emission decays faster with age for higher mass PMS stars. There is a strong correlation between $L_\ast$ and $L_{\rm X}$ for Hayashi track stars but no correlation for Henyey track stars. There is no correlation between $L_{\rm X}$ and radiative core mass or radius. However, the longer stars have spent with radiative cores, the less X-ray luminous they become. The decay of coronal X-ray emission from young early K to late G-type PMS stars, the progenitors of main sequence A-type stars, is consistent with the dearth of X-ray detections of the latter.
description: Accepted for publication in the MNRAS. 24 pages, 13 figures
Sound Event Detection Utilizing Graph Laplacian Regularization with Event Co-occurrence
Creators: name: Imoto, Keisuke
name: Kyochi, Seisuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: A limited number of types of sound event occur in an acoustic scene and some sound events tend to co-occur in the scene; for example, the sound events "dishes" and "glass jingling" are likely to co-occur in the acoustic scene "cooking". In this paper, we propose a method of sound event detection using graph Laplacian regularization with sound event co-occurrence taken into account. In the proposed method, the occurrences of sound events are expressed as a graph whose nodes indicate the frequencies of event occurrence and whose edges indicate the sound event co-occurrences. This graph representation is then utilized for the model training of sound event detection, which is optimized under an objective function with a regularization term considering the graph structure of sound event occurrence and co-occurrence. Evaluation experiments using the TUT Sound Events 2016 and 2017 detasets, and the TUT Acoustic Scenes 2016 dataset show that the proposed method improves the performance of sound event detection by 7.9 percentage points compared with the conventional CNN-BiGRU-based detection method in terms of the segment-based F1 score. In particular, the experimental results indicate that the proposed method enables the detection of co-occurring sound events more accurately than the conventional method.
description: Accepted to IEICE Transactions on Information and Systems
Café Latte: Spontaneous layer formation in laterally cooled double diffusive convection
Creators: name: Chong, K. L.
name: Yang, R.
name: Wang, Q.
name: Verzicco, R.
name: Lohse, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In the preparation of Café Latte, spectacular layer formation can occur between the expresso shot in a glass of milk and the milk itself. Xue et al. (Nat. Commun., vol. 8, 2017, pp. 1-6) showed that the injection velocity of expresso determines the depth of coffee-milk mixture. After a while when a stable stratification forms in the mixture, the layering process can be modelled as a double diffusive convection system with a stably-stratified coffee-milk mixture cooled from the side. More specifically, we perform (two-dimensional) direct numerical simulations of laterally cooled double diffusive convection for a wide parameter range, where the convective flow is driven by a lateral temperature gradient while stabilized by a vertical concentration gradient. When the thermal driving force dominates over the stabilizing force, the flow behaves like vertical convection in which a large-scale circulation develops. However, with increasing strength of the stabilizing force, a meta-stable layered regime emerges. Initially, several vertically-stacked convection rolls develop, and these well-mixed layers are separated by sharp interfaces with large concentration gradients. The initial thickness of these emerging layers can be estimated by balancing the work exerted by thermal driving and the required potential energy to bring fluid out of its equilibrium position in the stably stratified fluid. In the layered regime, we further observe successive layer merging, and eventually only a single convection roll remains. We elucidate the following merging mechanism: As weakened circulation leads to accumulation of hot fluid adjacent to the hot sidewall, larger buoyancy forces associated with hotter fluid eventually break the layer interface. Then two layers merge into a larger layer, and circulation establishes again within the merged structure.
description: 10 pages, 4 figures
A model to identify urban traffic congestion hotspots in complex networks
Creators: name: Solé-Ribalta, Albert
name: Gómez, Sergio
name: Arenas, Alex
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Traffic congestion is one of the most notable problems arising in worldwide urban areas, importantly compromising human mobility and air quality. Current technologies to sense real-time data about cities, and its open distribution for analysis, allow the advent of new approaches for improvement and control. Here, we propose an idealized model, the Microscopic Congestion Model, based on the critical phenomena arising in complex networks, that allows to analytically predict congestion hotspots in urban environments. Results on real cities' road networks, considering, in some experiments, real-traffic data, show that the proposed model is capable of identifying susceptible junctions that might become hotspots if mobility demand increases.
description: 8 pages, 4 figures
Characterization & Mechanical Property Analysis of Al2O3 Filled Flax/Unsaturated polyester composite
Creators: name: Gebre Fenta
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2022
Subjects: Al2O3 filled, Chopped flax, Compression molding, Hand layup and Unsaturated polyester resin

description: This thesis has endeavored to develop Al2O3 filled natural fiber reinforced polymer
 composite which can be able to substitute the most widely used synthetic E-glass fiber
 material. The research is found indispensable that E-glass fiber reinforcing material has
 several drawbacks related to renewable source, biodegradability, density, energy and
 harmfulness to health. Taking these limitations as a foot-print, 0, 5, 10 and 15wt%
 Al2O3 filled chopped flax/unsaturated polyester resin (UPR) composite has developed
 by the conventional hand layup followed by a compression molding process. It
 comprises the detail manufacturing process of the chopped flax/UPR-Al2O3 filled
 composite, preparation of test specimens and testing methods using ASTM standards.
 Test results of these depict that both physical and mechanical properties of the base
 chopped flax/UPR composite are all affected due to the inclusion and variation of the
 content of Al2O3 in 15 and 25wt% fiber loading cases. Uniform distribution of the filler
 and strong interfacial adhesion has observed in 15/UPR-5, 15/UPR-10 and 25/UPR-5
 compositions. Water resistance behavior of the developed composite has also discussed
 and higher water resistance has observed in 15/UPR-15 and 25/UPR-5 compositions. It
 was also able to gain a 39.06% increase in the ultimate tensile strength of the composite
 in 25/UPR-5 composition. The effect of Al2O3 on the Charpy impact strength of the
 base chopped flax/UPR composite has also analyzed and a 45% increase has observed
 in 15/UPR-10 composition. The comparison of the current research findings with
 previous related works has also included. It is found that the newly developed
 composite is applicable to manufacture automotive mud guard and engine undercover
 with minimum cost. It is also recommended to make the roof cover of a three-wheel
 taxi (Bajaj) in place of Hypalon (a thermosetting polymer material)