cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Distributed Artificial Intelligence Solution for D2D Communication in 5G Networks
Creators: name: Ioannou, Iacovos
name: Vassiliou, Vasos
name: Christophorou, Christophoros
name: Pitsillides, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Device to Device (D2D) Communication is one of the technology components of the evolving 5G architecture, as it promises improvements in energy efficiency, spectral efficiency, overall system capacity, and higher data rates. The above noted improvements in network performance spearheaded a vast amount of research in D2D, which have identified significant challenges that need to be addressed before realizing their full potential in emerging 5G Networks. Towards this end, this paper proposes the use of a distributed intelligent approach to control the generation of D2D networks. More precisely, the proposed approach uses Belief-Desire-Intention (BDI) intelligent agents with extended capabilities (BDIx) to manage each D2D node independently and autonomously, without the help of the Base Station. The paper includes detailed algorithmic description for the decision of transmission mode, which maximizes the data rate, minimizes the power consumptions, while taking into consideration the computational load. Simulations show the applicability of BDI agents in jointly solving D2D challenges.
description: 10 pages,9 figures
Technological novelty profile and invention's future impact
Creators: name: Kim, Daniel
name: Cerigo, Daniel Burkhardt
name: Jeong, Hawoong
name: Youn, Hyejin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We consider inventions as novel combinations of existing technological capabilities. Patent data allow us to explicitly identify such combinatorial processes in invention activities. Unconsidered in the previous research, not every new combination is novel to the same extent. Some combinations are naturally anticipated based on patent activities in the past or mere random choices, and some appear to deviate exceptionally from existing invention pathways. We calculate a relative likelihood that each pair of classification codes is put together at random, and a deviation from the empirical observation so as to assess the overall novelty (or conventionality) that the patent brings forth at each year. An invention is considered as unconventional if a pair of codes therein is unlikely to be used together given the statistics in the past. Temporal evolution of the distribution indicates that the patenting activities become more conventional with occasional cross-over combinations. Our analyses show that patents introducing novelty on top of the conventional units would receive higher citations, and hence have higher impact.
description: 20 pages, 7 figures
Matter-wave soliton interferometer based on a nonlinear splitter
Creators: name: Sakaguchi, Hidetsugu
name: Malomed, Boris A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We elaborate a model of the interferometer which, unlike previously studied ones, uses a local (delta-functional) nonlinear repulsive potential, embedded into a harmonic-oscillator trapping potential, as the splitter for the incident soliton. An estimate demonstrates that this setting may be implemented by means of the localized Feshbach resonance controlled by a focused laser beam. The same system may be realized as a nonlinear waveguide in optics. Subsequent analysis produces an exact solution for scattering of a plane wave in the linear medium on the delta-functional nonlinear repulsive potential, and an approximate solution for splitting of the incident soliton when the ambient medium is nonlinear. The most essential result, obtained by means of systematic simulations, is that the use of the nonlinear splitter provides the sensitivity of the soliton-based interferometer to the target, inserted into one of its arms, which is much higher than the sensitivity provided by the usual linear splitter.
description: New Journal of Physics, to be published (Focus issue on "Strongly interacting quantum gases in one dimension")
Some questions concerning attractors for non-autonomous dynamical systems
Creators: name: Johnson, Russell
name: Muñoz-Villarragut, Víctor
Publisher: name: arXiv
Year: 2024
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B55, 34C29, 34C45, 34D45

description: We compare various concepts of attractor in the context of non-autonomous dynamical systems. Then, we prove an appropriate version of the Pliss reduction principle for non-autonomous differential systems with rapidly oscillating coefficients.
description: 16 pages
Deep Neural Networks with Trainable Activations and Controlled Lipschitz Constant
Creators: name: Aziznejad, Shayan
name: Gupta, Harshit
name: Campos, Joaquim
name: Unser, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We introduce a variational framework to learn the activation functions of deep neural networks. Our aim is to increase the capacity of the network while controlling an upper-bound of the actual Lipschitz constant of the input-output relation. To that end, we first establish a global bound for the Lipschitz constant of neural networks. Based on the obtained bound, we then formulate a variational problem for learning activation functions. Our variational problem is infinite-dimensional and is not computationally tractable. However, we prove that there always exists a solution that has continuous and piecewise-linear (linear-spline) activations. This reduces the original problem to a finite-dimensional minimization where an l1 penalty on the parameters of the activations favors the learning of sparse nonlinearities. We numerically compare our scheme with standard ReLU network and its variations, PReLU and LeakyReLU and we empirically demonstrate the practical aspects of our framework.
title: The reliability of automatic sprinkler systems
Creators: name: Richardson, J. K.
Publisher: name: National Research Council of Canada. Institute for Research in Construction
Year: 1985
Subjects: subject: Sprinklers
valueUri: urn:ircsubjects:IRC0462
subject: Gicleurs
valueUri: urn:ircsubjects:IRC0462
subject: sprinkler system
subject: réseaux d'extincteurs
subject: reliability
subject: fiabilité
subject: performance
subject: inspection

description: Automatic sprinkler systems have played a key role in fire protection engineering for over a century. Based on a review of statistical data, this Digest shows the reliability of such systems in place to be in excess of 96%. Means are suggested to improve this reliability to 99% through proper design, inspection and maintenance of systems.
Quaternaria quaternata J. Schrot.
Creators: name: Mehrabi, Mehdi
name: Hemmati, Roghayeh
name: Vasilyeva, Larissa N.
name: Trouillas, Florent P.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Sordariomycetes
Xylariales
Diatrypaceae
Quaternaria
Quaternaria quaternata

description: Quaternaria quaternata (Pers.) J. Schröt., in Cohn, Krypt.-Fl. Schlesien (Breslau) 3.2(4): 451 (1897). Fig. 6
 Basionym: Sphaeria quaternata Pers. in Observ. mycol. (Lipsiae) 1: 64 (1796).
 Synonym: Eutypella quaternata (Pers.) Rappaz in Mycol. helv. 2(3): 502 (1987).
 Saprobic on decaying wood. Sexual morph: Stromata densely immersed in the bark of dead branches (1.5 cm diameter), dotted at the surface with tiny black ectostroma; 2–6 perithecial arranged in a stromata in the bark, circular, 1–2 mm diam, stromatal aggregations widely effused over branches; perithecia black, circinately arranged, 300–600 μm diam. Asci octospori, almost cylindrical or slightly clavate, (70–)90–130(–155) × 6–7.5 μm. Ascospores uni or biseriate, allantoid, dilute brownish,: (8–)9–13(–14) × 2–3 μm. Paraphyses were elongate, filiform. Asexual morph: Undetermined.
 Cultural characteristics:—Colonies white and fulvous (13 , i) in the center on PDA, with dense, chiefly immersed, felty mycelium, circular to slightly irregular, reverse sienna (13i) and black particularly in the colony center after 2 weeks in the dark at 24 °C, covering 75 mm Petri-dish after 16 days at 24°C.
 Specimen examined:— IRAN, Guilan Province, Rasht City, on dead branches of Fagus sp., 11 July 2013, M. Mehrabi, GNF13 (IRAN 16681F, IRAN 2348C).
 Notes:— Quaternaria was proposed by Tulasne & Tulasne (1863). Quaternaria quaternata was described as the type species of the genus Quaternaria and later proposed to be included in genus Eutypella (Rappaz 1989). However, Gams (1994) has not confirmed the conservation of the name Eutypella against Quaternaria. Molecular analysis by Acero et al. (2004) supported maintaining Quaternaria as an independent genus. Vasilyeva (2011) concluded that this genus can be distinguished as a separate genus not only because its name precedes that of Eutypella, but because the stromata of its members are cryptosphaeroid in their appearance and develop within the bark parenchyma. Based on both morphology and molecular sequence data, the occurrence of Quaternaria quaternata in Iran was confirmed with 100% bootstrap values in MP and NJ analysis (Fig.1). In our analysis, Quaternaria genus formed a clade with Cryptovalsa genus and this topology has been obtained previously (Trouillas et al. 2011). Vasilyeva (2011) has suggested that Quaternaria is the eutypelloid counterpart of Cryptosphaeria, but our analysis did not support this hypothesis.
description: Published as part of Mehrabi, Mehdi, Hemmati, Roghayeh, Vasilyeva, Larissa N. & Trouillas, Florent P., 2016, Diatrypella macrospora sp. nov. and new records of diatrypaceous fungi from Iran, pp. 43-55 in Phytotaxa 252 (1) on pages 51-52, DOI: 10.11646/phytotaxa.252.1.4, http://zenodo.org/record/13677220
title: Factors affecting sound transmission loss
Creators: name: Warnock, A. C. C.
Publisher: name: National Research Council of Canada. Institute for Research in Construction
Year: 1985
Subjects: subject: Sound transmission & insulation
valueUri: urn:ircsubjects:IRC0840
subject: Transmission acoustique et insonorisation
valueUri: urn:ircsubjects:IRC0840
subject: sound transmission loss
subject: perte de transmission sonore
subject: partitions
subject: cloison
subject: floors
subject: plancher
subject: mass
subject: masse
subject: stiffness
subject: rigidité

description: The sound transmission losses of single and double layer walls and floors are determined by the physical properties of the component materials and the methods of assembly. These factors are discussed.
Using Analogy to Solve a Three-Step Physics Problem
Creators: name: Lin, Shih-Yin
name: Singh, Chandralekha
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: In a companion paper, we discuss students' ability to take advantage of what they learn from a solved problem and transfer their learning to solve a quiz problem that has different surface features but the same underlying physics principles. Here, we discuss students' ability to perform analogical reasoning between another pair of problems. Both the problems can be solved using the same physics principles. However, the solved problem provided was a two- step problem (which can be solved by decomposing it into two sub-problems) while the quiz problem was a three-step problem. We find that it is challenging for students to extend what they learned from a two-step problem to solve a three-step problem.
Orbital Circularization of Hot and Cool Kepler Eclipsing Binaries
Creators: name: Van Eylen, Vincent
name: Winn, Joshua N.
name: Albrecht, Simon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The rate of tidal circularization is predicted to be faster for relatively cool stars with convective outer layers, compared to hotter stars with radiative outer layers. Observing this effect is challenging, because it requires large and well-characterized samples including both hot and cool stars. Here we seek evidence for the predicted dependence of circularization upon stellar type, using a sample of 945 eclipsing binaries observed by Kepler. This sample complements earlier studies of this effect, which employed smaller samples of better-characterized stars. For each Kepler binary we measure $e\cosω$ based on the relative timing of the primary and secondary eclipses. We examine the distribution of $e\cosω$ as a function of period for binaries composed of hot stars, cool stars, and mixtures of the two types. At the shortest periods, hot-hot binaries are most likely to be eccentric; for periods shorter than 4 days, significant eccentricities occur frequently for hot-hot binaries, but not for hot-cool or cool-cool binaries. This is in qualitative agreement with theoretical expectations based on the slower dissipation rates of hot stars. However, the interpretation of our results is complicated by the largely unknown ages and evolutionary states of the stars in our sample.
description: Accepted for publication in ApJ
Investigation of cut slopes based on limit Equilibrium & Stress- deformation methods: A case of felege selam- Ameya-chida road project
Creators: name: Kalkidan Aschale
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Slope Stability; Finite Element Method; Limit Equilibrium Method; Factor of Safety

description: Ethiopian roads authority has been trying to construct a newly designed road project along
 Felegeselam-Ameya-Chida area located in the Southern Nations and Nationalities Peoples
 (SNNP) Regional State of Ethiopia. In this project slope instability problem is highly
 encountered. Accordingly, the aim of this paper is investigation, analysis and design of proper
 remedial measures for selected two failed slope sectionsstationed atstation 57+600 to 57+800,
 and 78+000 to 79+140 located on left hand side (LHS) and right hand side (RHS) of the project
 road.To carryout the analysis, the first task was characterization and selection of failed slope
 sections using reconnaissance field survey and secondary data collection. Then for the analysis
 and modeling of the selected slope sections both the limiting equilibrium and finite element
 approaches were followed using the SLIDE and PLAXIS software respectively. The input
 parameters were obtained from empirical correlations from different literatures.For material
 modeling theMohr Coulomb material model under static loading condition was used. The
 Morgenstern and Price method analysis results were considered as final resultsfor the SLIDE
 software. To locate the critical slip surface a slip center search grid of 20х20 intervals with slice
 number 25 was used for a safety factor analysis of all slope profiles from global minimum of
 SLIDE software. For the PLAXIS 2D software, the slope profiles were analyzed using 15-noded
 triangular elements using the standard fixities to define the boundary conditions. For the
 sensitivity analysis of SLIDE software, the shear strength parameters and soil unit weight were
 defined as variables.For the plaxis software initial efforts were made to run sensitivity to study
 the effects of individual layers on the factor of safety but it was not feasible. Therefore, the
 variation of the factor of safety with respect to the displacement change was considered in the
 sensitivity analysis. Finally, using the results of the analysis, respective remedial measures were
 proposed and designed for the selected slope profiles.The results show that the slope sections
 were failed slopes with 100% probability of failure, which indicates high failure zone. From the
 finite element analysis results of PLAXIS software, it was found that the factor of safety results
 of the slope profiles ranges from 0.331 to 0.479 and a total displacement values of 1.88х106 to
 3.44х106m which indicates unstable zone.
Entropies in General Probabilistic Theories and its Application to Holevo Bound
Creators: name: Kimura, Gen
name: Ishiguro, Junji
name: Fukui, Makoto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: General probabilistic theories are designed to provide operationally the most general probabilistic models including both classical and quantum theories. In this letter, we introduce a systematic method to construct a series of entropies, all of which generalize Shannon entropy in classical system and von Neumann entropy in quantum system. Using these entropies, the Holevo bound, an upper bound of the accessible information from a quantum system, is generalized to hold in any general probabilistic theory.
description: 4 pages
Media Forensics and DeepFakes: an overview
Creators: name: Verdoliva, Luisa
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: With the rapid progress of recent years, techniques that generate and manipulate multimedia content can now guarantee a very advanced level of realism. The boundary between real and synthetic media has become very thin. On the one hand, this opens the door to a series of exciting applications in different fields such as creative arts, advertising, film production, video games. On the other hand, it poses enormous security threats. Software packages freely available on the web allow any individual, without special skills, to create very realistic fake images and videos. So-called deepfakes can be used to manipulate public opinion during elections, commit fraud, discredit or blackmail people. Potential abuses are limited only by human imagination. Therefore, there is an urgent need for automated tools capable of detecting false multimedia content and avoiding the spread of dangerous false information. This review paper aims to present an analysis of the methods for visual media integrity verification, that is, the detection of manipulated images and videos. Special emphasis will be placed on the emerging phenomenon of deepfakes and, from the point of view of the forensic analyst, on modern data-driven forensic methods. The analysis will help to highlight the limits of current forensic tools, the most relevant issues, the upcoming challenges, and suggest future directions for research.
title: Membranes d'étanchéité monocouches
Creators: name: Laaly, H. O.
name: Dutt, O.
Publisher: name: Conseil national de recherches du Canada. Division des recherches en construction
Year: 1985
Subjects: subject: Roofs
valueUri: urn:ircsubjects:IRC0770
subject: Toits
valueUri: urn:ircsubjects:IRC0770
subject: Roofs
valueUri: urn:ircsubjects:IRC0370
subject: Toitures
valueUri: urn:ircsubjects:IRC0370
subject: roofing
subject: couvertures
subject: roofing products
subject: produit de couverture
subject: rubberized asphalt
subject: asphalte caoutchoute
subject: liquid roofing
subject: membrane liquide (toiture)
subject: elastomeric roofings
subject: couverture à base d'élastomère
subject: PVC
subject: chlorure de polyvinyle

description: Le présent Digest traite des propriétés, des avantages et des inconvénients de nouveaux matériaux de couverture synthétiques, y compris les membranes préfabriquées appliquées en feuilles et les membranes appliquées sous forme liquide.
Absolute chiral sensing in dielectric metasurfaces with signal reversals
Creators: name: Droulias, Sotiris
name: Bougas, Lykourgos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Sensing molecular chirality at the nanoscale has been a long-standing challenge due to the inherently weak nature of chiroptical signals, and nanophotonic approaches have proven fruitful in accessing these signals. However, in most cases, absolute chiral sensing of the total chiral refractive index has not been possible, while the strong inherent signals from the nanostructures themselves obscure the weak chiroptical signals. Here, we propose a dielectric metamaterial system that overcomes these limitations and allows for absolute measurements of the total chirality, and the possibility for a crucial signal reversal that enables chirality measurements without the need for sample removal. As proof of principle, we demonstrate signal-enhancements by a factor of 200 for ultrathin, sub-wavelength, chiral samples over a uniform and accessible area.
description: 5 pages, 4 figures
The LAMOST spectroscopic survey of star clusters in M31. II. Metallicities, ages and masses
Creators: name: Bingqiu, Chen
name: Xiaowei, Liu
name: Maosheng, Xiang
name: Haibo, Yuan
name: Yang, Huang
name: Jianrong, Shi
name: Zhou, Fan
name: Zhiying, Huo
name: Chun, Wang
name: Juanjuan, Ren
name: Zhijia, Tian
name: Huawei, Zhang
name: Gaochao, Liu
name: Zihuang, Cao
name: Yong, Zhang
name: Yonghui, Hou
name: Yuefei, Wang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We select from Paper I a sample of 306 massive star clusters observed with the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) in the vicinity fields of M31 and M33 and determine their metallicities, ages and masses. Metallicities and ages are estimated by fitting the observed integrated spectra with stellar synthesis population (SSP) models with a pixel-to-pixel spectral fitting technique. Ages for most young clusters are also derived by fitting the multi-band photometric measurements with model spectral energy distributions (SEDs). The estimated cluster ages span a wide range, from several million years to the age of the universe. The numbers of clusters younger and older than 1 Gyr are respectively 46 and 260. With ages and metallicities determined, cluster masses are then estimated by comparing the multi-band photometric measurements with SSP model SEDs. The derived masses range from $\sim 10^{3}$ to $\sim 10^7$ $M_{\odot}$, peaking at $\sim 10^{4.3}$ and $\sim 10^{5.7}$ $M_{\odot}$ for young ($< 1$ Gyr) and old ($>1$ Gyr) clusters, respectively. Our estimated metallicities, ages and masses are in good agreement with available literature values. Old clusters richer than [Fe/H] $\sim -0.7$ dex have a wide range of ages. Those poorer than [Fe/H] $\sim -0.7$ dex seem to be composed of two groups, as previously found for Galactic GCs -- one of the oldest ages with all values of metallicity down to $\sim -2$ dex and another with metallicity increasing with decreasing age. The old clusters in the inner disk of M\,31 (0 -- 30 kpc) show a clear metallicity gradient measured at $-0.038\pm0.023$ dex/kpc.
description: 22 pages, 18 figures, accepted for publication in the AJ
Nonparametric geostatistical risk mapping
Creators: name: Fernández-casal, Rubén
name: Castillo-Páez, Sergio
name: Francisco-Fernández, Mario
Publisher: name: arXiv
Year: 2024
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: 62H11 (Primary), 62G08, 62G09 (Secondary)

description: In this work, a fully nonparametric geostatistical approach to estimate threshold exceeding probabilities is proposed. To estimate the large-scale variability (spatial trend) of the process, the nonparametric local linear regression estimator, with the bandwidth selected by a method that takes the spatial dependence into account, is used. A bias-corrected nonparametric estimator of the variogram, obtained from the nonparametric residuals, is proposed to estimate the small-scale variability. Finally, a bootstrap algorithm is designed to estimate the unconditional probabilities of exceeding a threshold value at any location. The behavior of this approach is evaluated through simulation and with an application to a real data set.
description: 17 pages, 4 figures
Development of Interatomic Potential for Al-Tb Alloy by Deep Neural Network Learning Method
Creators: name: Tang, L.
name: Yang, Z. J.
name: Wen, T. Q.
name: Ho, K. M.
name: Kramer, M. J.
name: Wang, C. Z.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: An interatomic potential for Al-Tb alloy around the composition of Al90Tb10 was developed using the deep neural network (DNN) learning method. The atomic configurations and the corresponding total potential energies and forces on each atom obtained from ab initio molecular dynamics (AIMD) simulations are collected to train a DNN model to construct the interatomic potential for Al-Tb alloy. We show the obtained DNN model can well reproduce the energies and forces calculated by AIMD. Molecular dynamics (MD) simulations using the DNN interatomic potential also accurately describe the structural properties of Al90Tb10 liquid, such as the partial pair correlation functions (PPCFs) and the bond angle distributions, in comparison with the results from AIMD. Furthermore, the developed DNN interatomic potential predicts the formation energies of crystalline phases of Al-Tb system with the accuracy comparable to ab initio calculations. The structure factor of Al90Tb10 metallic glass obtained by MD simulation using the developed DNN interatomic potential is also in good agreement with the experimental X-ray diffraction data.
Stability in sense of Lyapunov of circular orbits in Manev potential
Creators: name: Blaga, Cristina
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this article we consider the motion of two bodies under the action of a Manev central force. We obtain the radius of the circular orbit and analyze its stability in sense of Lyapunov. Drawn on the first integrals of angular momentum and energy, we build a positive definite function which satisfies the Lyapunov's theorem of stability. The existence of the Lyapunov function prove that the circular orbits in Manev two body problem are stable at any perturbation. In the end we compare these results with those valid for the circular orbits in the Newtonian gravitational field.
description: 8 pages
Investigation on Mechanical Properties & Suitability of Highland Bamboo Yushania Alpina) for Use in Structural Truss Members
Creators: name: Woubshet, Solomon
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Bamboo culm, roof truss, mechanical properties, Ethiopian highland bamboo, structural suitability

description: The questions raised on materials used for construction are extending to economic and
 environmental issues. Several researches have been conducted with the objective of
 having materials that conserve the environment, durable, efficient and cost effective. To
 alleviate economic and environmental problem, different alternatives are introduced to
 the industry. Bamboo, as a fast growing and strong plant is being considered as a
 substitute for timber and steel. Ethiopia has two species of bamboo that cover about 1.4
 million hectare area and distributed in different regions. It had a long time use in the
 traditional house construction and for furniture and other non structural purposes. In
 this paper, investigation is made on the mechanical properties of Ethiopian highland
 bamboo and its suitability as a roof truss element. In addition, the variation due to
 geographical location and its cost compared to timber and steel is assessed. The samples
 collected from Tikur inchini (Oromia), Gurage (SNPPR) and Sidama are tested for
 compressive, bending and tensile properties. For compressive strength Gurage, Sidama
 and Tikur inchini area air dried bamboo culms showed average compressive strength of
 58.25N/mm2, 44.21N/mm2and 53.07N/mm2 respectively. In the other case, oven dried
 samples of the three areas were tested and the Sidama, Gurage and Tikur inchini area
 bamboo showed average compressive strength of 121.1N/mm2, 118.34N/mm2 and
 122N/mm2 respectively. For bending strength, the Sidama area bamboo had highest
 average strength of 67.82N/mm2and the Tikur inchini had the lowest of 21.42N/mm2. In
 tensile strength test, the Gurage, Sidama and Tikur inchini area had an average tensile
 strength of 136.13N/mm2, 85.73N/mm2 and 73.26N/mm2 respectively. A bamboo truss
 was tested for load carrying capacity and found to carry a load of 110kg and remain
 stable. In addition, the design load of a G+0 building roof truss was found lower than the
 tensile and compressive strengths of the tested samples. For a building of 12m*3m span,
 the cost was estimated a lowest of 1860 birr for bamboo and highest for steel section with
 a price of 6700 birr. Generally, bamboo culm showed a better performance to be used as
 a roof truss member with a lower price.
A Wiener Lemma for the discrete Heisenberg group: Invertibility criteria and applications to algebraic dynamics
Creators: name: Göll, Martin
name: Schmidt, Klaus
name: Verbitskiy, Evgeny
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: Operator Algebras (math.OA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 54H20 37A45 22D10 37C85 47B38

description: This article contains a Wiener Lemma for the convolution algebra $\ell^1(\mathbb H,\mathbb C)$ and group $C^\ast$-algebra $C^\ast(\mathbb H)$ of the discrete Heisenberg group $\mathbb H$. At first, a short review of Wiener's Lemma in its classical form and general results about invertibility in group algebras of nilpotent groups will be presented. The known literature on this topic suggests that invertibility investigations in the group algebras of $\mathbb H$ rely on the complete knowledge of $\widehat{\mathbb H}$ -- the dual of $\mathbb H$, i.e., the space of unitary equivalence classes of irreducible unitary representations. We will describe the dual of ${\mathbb H}$ explicitly and discuss its structure. Wiener's Lemma provides a convenient condition to verify invertibility in $\ell^1(\mathbb H,\mathbb C)$ and $C^\ast(\mathbb H)$ which bypasses $\widehat{\mathbb H}$. The proof of Wiener's Lemma for $\mathbb H$ relies on local principles and can be generalised to countable nilpotent groups. As our analysis shows, the main representation theoretical objects to study invertibility in group algebras of nilpotent groups are the corresponding primitive ideal spaces. Wiener's Lemma for $\mathbb H$ has interesting applications in algebraic dynamics and Time-Frequency Analysis which will be presented in this article as well.
description: Monatshefte f\"ur Mathematik 2016
The inverse problem in the calculus of variations: new developments
Creators: name: Do, Thoan
name: Prince, Geoff
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37J05, 70H03, 58A15 (Primary), 49N45 (Secondary)

description: We deal with the problem of determining the existence and uniqueness of Lagrangians for systems of $n$ second order ordinary differential equations. A number of recent theorems are presented, using exterior differential systems theory (EDS). In particular, we indicate how to generalise Jesse Douglas's famous solution for $n=2$. We then examine a new class of solutions in arbitrary dimension $n$ and give some non-trivial examples in dimension 3
Impact Loan Response of Inclined Aluminum Honeycomb structure
Creators: name: Ayantu Gemechu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Aluminum honeycomb; LS-DYNA; Impact load; Energy absorption capacity

description: Honeycomb cellular structures, due to their lightweight and high-energy absorbing
 capacity, has been used extensively as energy absorbers or cushions to resist external
 loads. This research work investigates application of inclined aluminum honeycomb
 structures to shield and protect vital infrastructures. Proposed honeycomb structure
 absorbs dynamic energy created due to extreme loading and extends life cycle of
 shielded parent infrastructures. ANSYS Mechanical APDL software used to develop
 3D model of honeycomb structure reported from literature and LS-DYNA non-linear
 finite element software Used for validation and parametric analysis. Further parametric
 studies on angle of inclination, unit cell geometry, wall thickness, and specimen size
 and specimen depth performed to optimize energy absorption capacity of honeycomb
 structure against impact load. The simulation results accurately predicted the average
 Resultant force, the specific absorbed energy and the total deformation of the specimen.
 The energy absorption diagram for honeycomb with different geometric configuration
 reveals the relationship between Force-displacement and energy per unit Volume.
 Results of this research indicate angle of inclination, thickness of cell size, size of cell
 geometry, specimen size and specimen depth on inclined Aluminum honeycomb has
 significant effect on overall response of impact load.
 Increasing of core thickness from 0.1mm to 1.00mm increase Internal energy by 74 %,
 increasing of spacemen size from S-1 to S-3 internal energy increased by 52% and
 increasing of spacemen depth from H-1 to H-3 internal energy increased by 38%. Energy
 absorption of inclined honeycomb structure increased by increasing of cell thickness,
 spacemen size and spacemen depth. While increasing of angle of inclination from 5 0 to
 30 0 Internal energy decrease by 74%, increasing of core dimeter from 3.2mm to 5.2mm
 internal energy decrease by 164%. Increasing of angle inclination and core dimeter have
 decrease energy absorption of inclined honeycomb structure performance.
Deep learning generates custom-made logistic regression models for explaining how breast cancer subtypes are classified
Creators: name: Shibahara, Takuma
name: Wada, Chisa
name: Yamashita, Yasuho
name: Fujita, Kazuhiro
name: Sato, Masamichi
name: Kuwata, Junichi
name: Okamoto, Atsushi
name: Ono, Yoshimasa
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Differentiating the intrinsic subtypes of breast cancer is crucial for deciding the best treatment strategy. Deep learning can predict the subtypes from genetic information more accurately than conventional statistical methods, but to date, deep learning has not been directly utilized to examine which genes are associated with which subtypes. To clarify the mechanisms embedded in the intrinsic subtypes, we developed an explainable deep learning model called a point-wise linear (PWL) model that generates a custom-made logistic regression for each patient. Logistic regression, which is familiar to both physicians and medical informatics researchers, allows us to analyze the importance of the feature variables, and the PWL model harnesses these practical abilities of logistic regression. In this study, we show that analyzing breast cancer subtypes is clinically beneficial for patients and one of the best ways to validate the capability of the PWL model. First, we trained the PWL model with RNA-seq data to predict PAM50 intrinsic subtypes and applied it to the 41/50 genes of PAM50 through the subtype prediction task. Second, we developed a deep enrichment analysis method to reveal the relationships between the PAM50 subtypes and the copy numbers of breast cancer. Our findings showed that the PWL model utilized genes relevant to the cell cycle-related pathways. These preliminary successes in breast cancer subtype analysis demonstrate the potential of our analysis strategy to clarify the mechanisms underlying breast cancer and improve overall clinical outcomes.
description: 25 pages, 5 figures
[B.4.05.a.3.] L'Arbre
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/03470499X/id
http://www.idref.fr/027261468/id
http://www.idref.fr/050613995/id
http://www.idref.fr/027280470/id

Abstract
Hydraulic Modeling & Improvement of Akaka Phase 3B: water Supply Distribution system Wit in The City of Addis Ababa
Creators: name: Tesfaye Lulie
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Calibration, Hydraulic Performance Evaluation, Pressure, Velocity, WaterGEMS V8i.

description: Addis Ababa faces a serious deficit of water supply due to increased population and
 expanded economic activities in and around the subsystems. Uneven pressures and
 tremendous fluctuations are observed in the flow rate. To understand the cause,
 hydraulic performance of the water supply system was analyzed using WaterGEMS V8i
 software.
 Data was collected through actual site visits to the project areas (from sources to the
 distribution lines) and assessing existing water supply components and also by
 measuring pressures (by using pressure gauge), velocities and flows (by using Ultrasonic)
 direct readings from the study area for the purpose of calibration and validation. Data is
 collected from secondary data.
 Maximum day demand (MDD) of current (2020), phase I (2032) and phase II (2042) are
 1,067 l/s, 1,453 l/s and 2,305 l/s respectively. And also, peak hour demand (PHD) of
 current, phase I and phase II are 1,484 l/s, 2,022 l/s and 3,207 l/s respectively
SNP-S3: Shared Network Pre-training and Significant Semantic Strengthening for Various Video-Text Tasks
Creators: name: Dong, Xingning
name: Guo, Qingpei
name: Gan, Tian
name: Wang, Qing
name: Wu, Jianlong
name: Ren, Xiangyuan
name: Cheng, Yuan
name: Chu, Wei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: We present a framework for learning cross-modal video representations by directly pre-training on raw data to facilitate various downstream video-text tasks. Our main contributions lie in the pre-training framework and proxy tasks. First, based on the shortcomings of two mainstream pixel-level pre-training architectures (limited applications or less efficient), we propose Shared Network Pre-training (SNP). By employing one shared BERT-type network to refine textual and cross-modal features simultaneously, SNP is lightweight and could support various downstream applications. Second, based on the intuition that people always pay attention to several "significant words" when understanding a sentence, we propose the Significant Semantic Strengthening (S3) strategy, which includes a novel masking and matching proxy task to promote the pre-training performance. Experiments conducted on three downstream video-text tasks and six datasets demonstrate that, we establish a new state-of-the-art in pixel-level video-text pre-training; we also achieve a satisfactory balance between the pre-training efficiency and the fine-tuning performance. The codebase are available at https://github.com/alipay/Ant-Multi-Modal-Framework/tree/main/prj/snps3_vtp.
description: Accepted by TCSVT (IEEE Transactions on Circuits and Systems for Video Technology)
Dipole Analysis of the Dielectric Function of Colour Dispersive Materials: Application to Monoclinic Ga$_2$O$_3$
Creators: name: Sturm, Chris
name: Schmidt-Grund, Rüdiger
name: Kranert, Christian
name: Furthmüller, Jürgen
name: Bechstedt, Friedhelm
name: Grundmann, Marius
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We apply a generalized model for the determination and analysis of the dielectric function of optically anisotropic materials with colour dispersion to phonon modes and show that it can also be generalized to excitonic polarizabilities and electronic band-band transitions. We take into account that the tensor components of the dielectric function within the cartesian coordinate system are not independent from each other but are rather projections of the polarization of dipoles oscillating along directions defined by the, non-cartesian, crystal symmetry and polarizability. The dielectric function is then composed of a series of oscillators pointing in different directions. The application of this model is exemplarily demonstrated for monoclinic ($β$-phase) Ga$_2$O$_3$ bulk single crystals. Using this model, we are able to relate electronic transitions observed in the dielectric function to atomic bond directions and orbitals in the real space crystal structure. For thin films revealing rotational domains we show that the optical biaxiality is reduced to uniaxial optical response.
description: 10 pages, 6 figures
Using Analogical Problem Solving with Different Scaffolding Supports to Learn about Friction
Creators: name: Lin, Shih-Yin
name: Singh, Chandralekha
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Prior research suggests that many students believe that the magnitude of the static frictional force is always equal to its maximum value. Here, we examine introductory students' ability to learn from analogical reasoning (with different scaffolding supports provided) between two problems that are similar in terms of the physics principle involved but one problem involves static friction, which often triggers the misleading notion. To help students process through the analogy deeply and contemplate whether the static frictional force was at its maximum value, students in different recitation classrooms received different scaffolding support. We discuss students' performance in different groups.
description: arXiv admin note: text overlap with arXiv:1602.05697
Ground water potential Assessment of Birr River Catchment , Abay River Basin Ethiopian
Creators: name: Ahunm Fentahun
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Birr River catchment, Groundwater recharge, hydrochemistry, water quality

description: The development of a balanced plan for water resource utilization requires assessment
 of the water resources in terms of quality, quantity, and the land use land cover
 condition of the entire catchment area. The Birr River catchment is located in the
 northwest part of Ethiopia particularly in the west Gojam zone. The area is
 characterized by highly dissected river valleys, gently sloping and undulating plains,
 and highlands. The study area is covered by Migmatitic gneiss, Mesozoic sediment,
 Cenozoic volcanic rock, and Recent sediments. Different approaches have been used
 to quantify the main hydrometeorological components and finally estimate the
 recharge amount of the catchment. The annual rainfalls of point data from different
 nearby stations of the catchment are analyzed using Arithmetic, Thiessen polygon,
 and Isohyetal methods. However, the average value obtained through Thiessen and
 Isohyetal method was taken as the annual average rainfall of the study area which is
 1597.15 mm. Since the study area is characterized by topographic variation and nonuniform distribution of the meteorological station's rainfall pattern. The actual
 evapotranspiration of the catchment is calculated by evaluating the land use land
 cover type, soil texture, and their areal proportion and is computed to be 747.7mm per
 year. The annual recharge of the catchment is estimated using baseflow separation
 and general water balance methods of which the water balance method (387.45 mm)
 is preferred to be the annual recharge of the catchment. Since it includes major
 parameters and components that influence water resources. Weathered and fractured
 basalt are the major aquifers of the area. The groundwater potential, rechargedischarge condition, and groundwater flow system of the area are generally controlled
 by topographic features, the amount of rainfall, and the prevailing structure. The
 general groundwater flow direction is from northeastern to southwestern. From the
 hydrochemical analysis, different water types are identified: Ca-HCO3, Ca/Mg-HCO3,
 and Na-HCO3. The dominant water type of the area is Ca-HCO3 water type of the area
 generally evolve from Ca-HCO3 in the recharge area to Ca/Mg-HCO3 and Na-HCO3
 transitional and discharge areas respectively. The evolution is dominantly controlled
 by the hydrolysis of silicate minerals and cation exchange. The results of the
 calculated indices for drinking and agricultural water purpose quality indicated that
 water quality in most collected samples is in an excellent and good category.
Electromagnetic spin down of a transient accreting millisecond pulsar during quiescence
Creators: name: Melatos, Andrew
name: Mastrano, Alpha
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The measured spin-down rates in quiescence of the transient accreting millisecond pulsars IGR J00291+5934, XTE J1751-305, SAX J1808.4-3658, and Swift J1756.9-2508 have been used to estimate the magnetic moments of these objects assuming standard magnetic dipole braking. It is shown that this approach leads to an overestimate, if the amount of residual accretion is enough to distort the magnetosphere away from a force-free configuration, through magnetospheric mass loading or crushing, so that the lever arm of the braking torque migrates inside the light cylinder. We derive an alternative spin-down formula and calculate the residual accretion rates where the formula is applicable. As a demonstration, we apply the alternative spin-down formula to produce updated magnetic moment estimates for the four objects above. We note that, based on current uncertain observations of quiescent accretion rates, magnetospheric mass loading and crushing are neither firmly indicated nor ruled out in these four objects. Because quiescent accretion rates are not measured directly (only upper limits are placed), it is impossible to be confident without more data whether the thresholds for magnetospheric mass loading or crushing are reached or not.
description: 22 pages, 3 tables, accepted for publication in ApJ main journal