cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geotechnical Investigation on Engineering Properties of Soil Found in Guder Town
Creators: name: Eyerusalem Tadesse
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: AASHTO, Atterberg Limits, Coefficient of Consolidation, Specific gravity, Undrained Cohesion, and USCS

description: A soils investigation is an essential part of the design and construction of a proposed building or
 infrastructure. Guder is a town in western Ethiopia, 123 km from Addis Abeba. The objective of
 this research is to investigate the engineering properties of the soils found in the Guder town for
 better design and construction of civil engineering projects in the town. To achieve its objective
 samples from different parts of the town were collected and laboratory tests were done on the
 collected samples. The result of Atterberg limits test results of soils found in Guder town is liquid
 limit ranging between 19.02 - 103.81%, plastic limit 0 -42.93 % and Plasticity index 2.35 – 64.52
 %. The specific gravity test results are 2.33 – 3. The values are higher than the specific gravity of
 the temperate zone soils, which is about 2.65 -2.70. Grain size analysis test results that, the soil in
 Guder town is mostly silty and silty sand. In which the soil of the town has fine fraction 9.4 to
 88.4%, sand fraction 11 to 55.4 % and gravel fraction 0.6 to 47.8 %. Based on AASHTO soil
 classification system the soil categorized under group A-2-4, A-2.7, A7-5 and A-7-6. Soil type A-
 2-4 and A-2-7 Excellent quality and suitable for using as sub grade soil. But the other groups are
 poor quality and not suitable for sub grade material. Based on USCS soil classification system the
 soil categorized under group SC, MH, SM, GC, CH, and GM, most of the soil lies above A-line,
 it implies that the soil is inorganic clay with high plasticity, the remain is lies below A-line, which
 is organic silt with low plasticity. As determined from the one-dimensional consolidation test
 conducted on undisturbed soil samples, compression index (Cc) ranges from 0.47 -0.63, coefficient
 of consolidation (Cv) ranges from 0.006 -0.206 cm2/min, coefficient of permeability (k) ranges
 from 0.19 -23.42 cm/sec. From Unconsolidated undrained triaxial shear test result undrained
 cohesion ranges from 31.4 – 68.5 KN/m2. For this test the more circle envelop is curved and fall
 above the φ = 0 line with (φ = 6.56 – 11.31).
title: The regulation of building construction
Creators: name: Hansen, A. T.
Publisher: name: National Research Council of Canada. Institute for Research in Construction
Year: 1985
Subjects: subject: Codes & guides
valueUri: urn:ircsubjects:IRC0200
subject: Codes et guides
valueUri: urn:ircsubjects:IRC0200
subject: building codes
subject: code du bâtiment
subject: standards
subject: norme (document)

description: Federal, provincial and municipal building construction regulations are summarized. Common terminology is defined. The relationship between model codes and regulations is discussed.
Fuzzy Sliding Mode Controller Design for Pitch Angie Control of Permanent Magnet Synchronous Generator Based wind Turbine
Creators: name: Dawit Gizachew
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Fuzzy sliding mode controller, WECS, PMSG, PID, TSR

description: In order to utilize and use wind energy effectively maximum power point tracking
 controlling mechanisms are designed in wind energy generation systems. Wind energy
 conversion system is naturally nonlinear and fuzzy sliding mode pitch angle controller
 is designed following mathematical modeling of a wind turbine, pitch actuator and
 permanent magnet synchronous generator.
 When the wind speed is below the rated value sliding mode controller is designed
 to adjust the speed of the generator in order to attain the maximum power for
 a particular wind speed based on tip speed ratio.In this thesis PID, sliding and
 fuzzy sliding mode pitch angle controllers are designed for power control. Since
 the power coefficient of wind turbines are highly dependent on the pitch angle, this
 controllers are used to vary the pitch angle of the system during gusty winds. The
 transient response specifications of the generator mechanical power of the system
 using the three controllers can be stated as follows. The simulation results show that
 the settling time for mechanical power are 1.92 , 1.22, and 0.89 seconds while the
 overshoots are 9.33, 8.14, and 7.6 % for PID, sliding and fuzzy sliding mode controllers
 in the respective order. Although the simulation analysis is for the recorded wind
 speed, the results above are obtained for a constant wind speed of 13m/s to evaluate
 the controllers’ performance clearly. In addition to the improvement of transient
 specifications the chattering effect for mechanical power involved in sliding mode
 controller appreciably decreased in fuzzy sliding mode controller and it is proposed
 in this work.
Smart Parking System Based on Bluetooth Low Energy Beacons with Particle Filtering
Creators: name: Mackey, Andrew
name: Spachos, Petros
name: Plataniotis, Konstantinos N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Urban centers and dense populations are expanding, hence, there is a growing demand for novel applications to aid in planning and optimization. In this work, a smart parking system that operates both indoor and outdoor is introduced. The system is based on Bluetooth Low Energy (BLE) beacons and uses particle filtering to improve its accuracy. Through simple BLE connectivity with smartphones, an intuitive parking system is designed and deployed. The proposed system pairs each spot with a unique BLE beacon, providing users with guidance to free parking spaces and a secure and automated payment scheme based on real-time usage of the parking space. Three sets of experiments were conducted to examine different aspects of the system. A particle filter is implemented in order to increase the system performance and improve the credence of the results. Through extensive experimentation in both indoor and outdoor parking spaces, the system was able to correctly predict which spot the user has parked in, as well as estimate the distance of the user from the beacon.
Schizopria fallax Kieffer 1912
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Schizopria
Schizopria fallax

description: Schizopria fallax Kieffer, 1912a: 68, pl. 3, fig. 11.
Valid name
Entomacis fallax (Kieffer, 1912).
Summary of types
Syntype ♀, BMNH number 9.683. Syntypes 2 ♀♀.
Primary type data
103; Silhouette, ’08-9,/ Seychelles Exp.; Schizopria / fallax/ J.J.Kieffer/ type; figured specimen; Type; Type/ H.T.; Seychelle Islands./ Percy Sladen Trust/ Expedition./ 1913-170 (syntype ♀). 97; Mahe, ’08- 9,/ Seychelles Exp.; Schizopria / fallax/ J.J.Kieffer/ paratype; Seychelle Islands./ Percy Sladen Trust/ Expedition./ 1913-170 (syntype ♀). 84; Mahe, ’08-9,/ Seychelles Exp.; Schizopria / fallax/ J.J.Kieffer/ paratype; Seychelle Islands./ Percy Sladen Trust/ Expedition./ 1913-170 (syntype ♀).
Type locality
Seychelles, Silhouette, near Mont Pot-à-eau; Silhouette (as Mahé), Mare aux Cochons dist.; Mahé, Cascade Estate.
Remarks
Three syntypes were found which agree with the description except for having 13-segmented antenna; although Kieffer says the antenna is 12-segmented, this may be explained by a12-13 being closely joined, giving the appearance of 12 segments. The holotype label and paratype labels are erroneous, as Kieffer did not designate a holotype; consequently, they are all syntypes. The specimen numbered “103” is mounted on a card and is entire; “97” is mounted on a point and has the head and one antenna mounted separately; “84” is mounted on a point and is entire. All three syntypes belong to Entomacis.
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 74, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
Exploring Dense and Cold QCD in Magnetic Fields
Creators: name: Ferrer, E. J.
name: de la Incera, V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Strong magnetic fields are commonly generated in off-central relativistic heavy-ion collisions in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Lab and in the Large Hadron Collider at CERN and have been used to probe the topological configurations of the QCD vacua. A strong magnetic field can affect the character and location of the QCD critical point, influence the QCD phases, and lead to anomalous transport of charge. To take advantage of the magnetic field as a probe of QCD at higher baryon densities, we are going to need experiments capable to scan the lower energy region. In this context, the nuclotron-based ion collider facility (NICA) at JINR offers a unique opportunity to explore such a region and complement alternative programs at RHIC and other facilities. In this paper we discuss some relevant problems of the interplay between QCD and magnetic fields and the important role the experiments at NICA can play in tackling them.
description: Accepted for publication at the European Physical Journal A
Comunicación "El productor de series de ficción en un universo transmedia: cambios, retos y oportunidades"
Creators: name: Higueras Ruiz, María José
Publisher: name: Zenodo
Year: 2016

description: Presentación de la Comunicación “El productor de series de ficción en un universo transmedia: cambios, retos y oportunidades” el 8 de abril de 2016 en el Congreso Internacional “Narrativas Transmediales: Comunicación, Cultura y Activismo Social” organizado por el Centro Mediterráneo de la Universidad de Granada y el Proyecto I+D+I Narrativas Transmediales.
Multimodal Deep Unfolding for Guided Image Super-Resolution
Creators: name: Marivani, Iman
name: Tsiligianni, Evaggelia
name: Cornelis, Bruno
name: Deligiannis, Nikos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The reconstruction of a high resolution image given a low resolution observation is an ill-posed inverse problem in imaging. Deep learning methods rely on training data to learn an end-to-end mapping from a low-resolution input to a high-resolution output. Unlike existing deep multimodal models that do not incorporate domain knowledge about the problem, we propose a multimodal deep learning design that incorporates sparse priors and allows the effective integration of information from another image modality into the network architecture. Our solution relies on a novel deep unfolding operator, performing steps similar to an iterative algorithm for convolutional sparse coding with side information; therefore, the proposed neural network is interpretable by design. The deep unfolding architecture is used as a core component of a multimodal framework for guided image super-resolution. An alternative multimodal design is investigated by employing residual learning to improve the training efficiency. The presented multimodal approach is applied to super-resolution of near-infrared and multi-spectral images as well as depth upsampling using RGB images as side information. Experimental results show that our model outperforms state-of-the-art methods.
BLE Beacons for Indoor Positioning at an Interactive IoT-Based Smart Museum
Creators: name: Spachos, Petros
name: Plataniotis, Konstantinos N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The Internet of Things (IoT) can enable smart infrastructures to provide advanced services to the users. New technological advancement can improve our everyday life, even simple tasks as a visit to the museum. In this paper, an indoor localization system is presented, to enhance the user experience in a museum. In particular, the proposed system relies on Bluetooth Low Energy (BLE) beacons proximity and localization capabilities to automatically provide the users with cultural contents related to the observed artworks. At the same time, an RSS-based technique is used to estimate the location of the visitor in the museum. An Android application is developed to estimate the distance from the exhibits and collect useful analytics regarding each visit and provide a recommendation to the users. Moreover, the application implements a simple Kalman filter in the smartphone, without the need of the Cloud, to improve localization precision and accuracy. Experimental results on distance estimation, location, and detection accuracy show that BLE beacon is a promising solution for an interactive smart museum. The proposed system has been designed to be easily extensible to the IoT technologies and its effectiveness has been evaluated through experimentation.
Fire resistance performance of recycled Aggregate concrete
Creators: name: Kibrom Tekile
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Natural aggregate, Recycled aggregate, Temperature, compressive strength, splitting Tensile Strength.

description: Concrete is most widely used construction material and it extensively uses aggregate
 about 50-60% of its constituent materials. This implies the need to look for alternative materials
 to meet future aggregate demands especially as the trend shows booms in construction industry.
 Previous studies affirmed use of recycled aggregate as a partial replacement (up to 60%).
 However, there is gap in literature on fire resistance mechanical characteristics of using recycled
 aggregate as a partial replacement in structural concrete. This research tries to fill the gaps in
 previous studies, basically in the fire resistance performance of RAC for elevated temperatures
 (up to 900°C) and variable durations (1hr and 2hr).
 This research work presents experimental investigation on fire resistance behavior of
 structural concrete produced from recycled aggregate at 50% replacement levels. Experimental
 program were designed consisting of concrete with control and recycled aggregate with 50%
 replacement proportions to study physical properties (mass loss and density loss) and mechanical
 property at 1 and 2 hour fire exposure in 100 °C - 900 °C temperature ranges. In order to achieve
 these objectives, an extensive experimental program was undertaken and the results were
 carefully analyzed. 144 standard 100*100*100mm cube samples were prepared for both RAC
 concrete and NAC concrete and tested to failure using a universal testing machine according to
 BS 1881 part 116, 1983 and 32 hardened cylindrical concrete samples were prepared and the
 tensile strength of the cylinders were tested in accordance with ASTM C496/2006.
 Experimental results indicated as compared to control, at 50% recycled aggregate replacement
 level, for 1 hour duration fire exposure, compressive strength loss in ranges of 11.3 % - 35.24%
 were observed for 100 °C - 900 °C fire exposure intensities whereas for 2 hour duration fire
 exposure the dip were in ranges of 24.43% - 25.17%. However, tensile strength decreases was
 negligible at elevated temperatures.
Next Level Chatbot: Expert Advisory Solution
Creators: name: Puspowidjono, Kenneth
Publisher: name: CQUniversity
Year: 2025
Subjects: classificationCode: 460208
subject: Natural language processing
classificationCode: 461102
subject: Context learning
classificationCode: 460202
subject: Autonomous agents and multiagent systems

description: Automation has been ubiquitous as it has been proven to accelerate the whole process in any industry, including the service desk environment. The goal of this research is to improve the current automation model that has been implemented in the service desk industry. By combining the chatbot function, it will simplify the platform for the users to raise their issues, and if possible, the request will automatically be resolved without needing any human interaction. The chatbot will be designed to assist the user in automatically completing several Level 1 (L1) requests in the Information Technology Infrastructure Library (ITIL) framework, which consists of simple service desk requests that do not require any complex troubleshooting, such as password reset or update account details. A new ticket will then be created for each completed request to the ticketing system. Additionally, the chatbot will also be able to create a ticket to the service desk ticketing system for any request that cannot be automated, which then will be actioned by the human technician. The anticipated outcome of the project is to provide a change in the service desk system as it would optimise resource utilisation, minimise waiting time, and improve customer satisfaction, which will benefit the organisation in the long run.
Angular momentum loss in the envelope-disk transition region of HH 111 protostellar system: evidence for magnetic braking?
Creators: name: Lee, Chin-Fei
name: Hwang, Hsiang-Chih
name: Li, Zhi-Yun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: HH 111 is a Class I protostellar system at a distance of ~ 400 pc, with the central source VLA 1 associated with a rotating disk deeply embedded in a flattened envelope. Here we present the observations of this system at ~ 0.6" (240 AU) resolution in C18O (J=2-1) and 230 GHz continuum obtained with Atacama Large Millimeter/Submillimeter Array, and in SO obtained with Submillimeter Array. The observations show for the first time how a Keplerian rotating disk can be formed inside a flattened envelope. The flattened envelope is detected in C18O, extending out to >~ 2400 AU from the VLA 1 source. It has a differential rotation, with the outer part (>~ 2000 AU) better described by a rotation that has constant specific angular momentum and the innermost part (
title: Single-ply roofing membranes
Creators: name: Laaly, H. O.
name: Dutt, O.
Publisher: name: National Research Council of Canada. Division of Building Research
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: New synthetic roofing materials, including prefabricated sheet-applied membranes and liquid-applied membranes, are described. Their properties, advantages and disadvantages are discussed.
Growth and dissolution of macromolecular Markov chains
Creators: name: Gaspard, Pierre
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The kinetics and thermodynamics of free living copolymerization are studied for processes with rates depending on k monomeric units of the macromolecular chain behind the unit that is attached or detached. In this case, the sequence of monomeric units in the growing copolymer is a kth-order Markov chain. In the regime of steady growth, the statistical properties of the sequence are determined analytically in terms of the attachment and detachment rates. In this way, the mean growth velocity as well as the thermodynamic entropy production and the sequence disorder can be calculated systematically. These different properties are also investigated in the regime of depolymerization where the macromolecular chain is dissolved by the surrounding solution. In this regime, the entropy production is shown to satisfy Landauer's principle.
Spatio-angular fluorescence microscopy III. Constrained angular diffusion, polarized excitation, and high-NA imaging
Creators: name: Chandler, Talon
name: Shroff, Hari
name: Oldenbourg, Rudolf
name: La Rivière, Patrick
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We investigate rotational diffusion of fluorescent molecules in angular potential wells, the excitation and subsequent emissions from these diffusing molecules, and the imaging of these emissions with high-NA aplanatic optical microscopes. Although dipole emissions only transmit six low-frequency angular components, we show that angular structured illumination can alias higher frequency angular components into the passband of the imaging system. We show that the number of measurable angular components is limited by the relationships between three time scales: the rotational diffusion time, the fluorescence decay time, and the acquisition time. We demonstrate our model by simulating a numerical phantom in the limits of fast angular diffusion, slow angular diffusion, and weak potentials.
description: 22 pages, 5 figures
The group administered interactive questionnaire: An alternative to individual interviews
Creators: name: Yerushalmi, Edit
name: Henderson, Charles R.
name: Mamudi, William
name: Singh, Chandralekha
name: Lin, Shih-Yin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Individual interviews are often considered to be the gold standard for researchers to understand how people think about phenomena. However, conducting and analyzing interviews is very time consuming. This paper presents the Group Administered Interactive Questionnaire (GAIQ) as an alternative to individual interviews and discusses the pros and cons of each data collection method. Use of GAIQ will be discussed in the context of a study that seeks to understand teaching assistants' reasons for the design of problem solutions for introductory physics.
Determining crucial factors for the popularity of scientific articles
Creators: name: Jankowski, Robert
name: Sienkiewicz, Julian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Digital Libraries (cs.DL)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Using a set of over 70.000 records from PLOS One journal consisting of 37 lexical, sentiment and bibliographic variables we perform analysis backed with machine learning methods to predict the class of popularity of scientific papers defined by the number of times they have been viewed. Our study shows correlations among the features and recovers a threshold for the number of views that results in the best prediction results in terms of Matthew's correlation coefficient. Moreover, by creating a variable importance plot for random forest classifier, we are able to reduce the number of features while keeping similar predictability and determine crucial factors responsible for the popularity.
description: 13 pages, 6 figures
Presentación "Nuevas figuras en la producción audiovisual: el showrunner"
Creators: name: Ruiz, María José Higueras
Publisher: name: Zenodo
Year: 2020

description: Presentación "Nuevas figuras en la producción audiovisual: el showrunner" en el curso Series de Televisión en tiempos de pandemia organizado por la Facultad de Comunicación y Documentación de la Universidad de Granada y el Proyecto I+D+i NAR-TRANS 2 en modalidad online (10 noviembre y 3 diciembre, 2020).
Feasibility study of Treated Domestic wastewater use for Toilet Flushing: - The case in Addis Ababa, Kara Kore Condominium Sites
Creators: name: Gemechis  Tilahun
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Domestic wastewater, Membrane Bioreactor, Reclaimed Water, Toilet flushing

description: Where limited water resources are increasingly stressed due to urbanization, population growth,
 industrialization and city renewal, considering use of treated domestic wastewater from
 Membrane Bioreactor (MBR) for toilet flushing is becoming very important in Addis Ababa.
 However, despite reuse potential for toilet flushing is substantial no effort has been exerted by
 Addis Ababa Water and Sewerage Authority (AAWSA) to implement it till now. This research is
 designed; therefore, to assess reclaimed water use from MBR wastewater treatment plant for
 toilet flushing as an alternative to potable water in condominium site. An exploratory research
 design was used. Qualitative and quantitative data were collected for the study. Data analysis like
 wastewater effluent quality analysis, life cycle assessment tool, and social acceptances to use
 reclaimed water for toilet flushing were employed. The Life Cycle Assessment (LCA) tool was
 used to compute quantitative element which contains the technical and economic variable of the
 system. The social qualitative element was used to survey social acceptance of residents to use
 reclaimed water for toilet flushing purpose. The reclaimed water qualities conform to the
 standard set on the guideline except chlorine residue and most of the people were in fever of the
 use of the reclaimed water with very little concern with public health. The results from LCA
 showed that the net benefit from the water savings and investment on dual reticulation becoming
 positive after 9 years. But in pressure flow system, it will be achieved after 15 years. Therefore,
 according to the study, it is concluded that the use of reclaimed water from MBR for toilet
 flushing at condominium is feasible as compared to the existing potable water stress of the city.
High Speed Mid-Wave Infrared Uni-traveling Carrier Photodetector
Creators: name: Huang, Jian
name: Xie, Zhiyang
name: Chen, Yaojiang
name: Bowers, John
name: Chen, Baile
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Mid-wave infrared (MWIR) frequency comb is expected to dramatically improve the precision and sensitivity of molecular spectroscopy. For high resolution application, high speed MWIR photodetector is one of the key components, however, the commercially available high speed MWIR photodetector only has sub-GHz bandwidth currently. In this paper, we demonstrate, for the first time to our knowledge, a high speed mid-wave infrared (MWIR) uni-traveling carrier photodetector based on InAs/GaSb type-II superlattice (T2SL) at room temperature. The device exhibits a cutoff wavelength of 5.6μm, and 3dB bandwidth of 6.58 GHz for a 20μm diameter device at 300K. These promising results show the device has potential to be utilized in high speed applications such as frequency comb spectroscopy, free space communication and others. The limitations on the high frequency performance of the photodetectors are also discussed.
title: Introduction to building acoustics
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: buildings
subject: bâtiments
subject: acoustics
subject: acoustique
subject: sound measurement
subject: mesure sonore
subject: acoustic properties
subject: propriétés acoustiques
subject: acoustical control
subject: contrôle acoustique
subject: sound transmission loss
subject: perte de transmission sonore

description: Some of the fundamental terms and measures used in building acoustics to quantify sound and the acoustical properties of systems and materials are described.
Artificial versus Biological Intelligence in the Cosmos: Clues from a Stochastic Analysis of the Drake Equation
Creators: name: De Visscher, Alex
Publisher: name: arXiv
Year: 2020
Subjects: subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: The Drake equation has been used many times to estimate the number of observable civilizations in the Galaxy. However, the uncertainty of the outcome is so great that any individual result is of limited use, as predictions can range from a handful of observable civilizations in the observable universe to tens of millions per Milky Way-sized galaxy. A statistical investigation shows that the Drake equation, despite its uncertainties, delivers robust predictions of the likelihood that the prevalent form of intelligence in the universe is artificial rather than biological. The likelihood of artificial intelligence far exceeds the likelihood of biological intelligence in all cases investigated. This conclusion is contingent upon a limited number of plausible assumptions. The significance of this outcome in explaining the Fermi paradox is discussed.
description: 13 pages, 3 figures, 3 tables. Submitted for publication in Int. J. Astrobiol
Longer time accuracy for incompressible Navier-Stokes simulations with the EMAC formulation
Creators: name: Olshanskii, Maxim A.
name: Rebholz, Leo G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M60 (Primary) 35Q30, 76D05 (Secondary)

description: In this paper, we consider the recently introduced EMAC formulation for the incompressible Navier-Stokes (NS) equations, which is the only known NS formulation that conserves energy, momentum and angular momentum when the divergence constraint is only weakly enforced. Since its introduction, the EMAC formulation has been successfully used for a wide variety of fluid dynamics problems. We prove that discretizations using the EMAC formulation are potentially better than those built on the commonly used skew-symmetric formulation, by deriving a better longer time error estimate for EMAC: while the classical results for schemes using the skew-symmetric formulation have Gronwall constants dependent on $\exp(C\cdot Re\cdot T)$ with $Re$ the Reynolds number, it turns out that the EMAC error estimate is free from this explicit exponential dependence on the Reynolds number. Additionally, it is demonstrated how EMAC admits smaller lower bounds on its velocity error, since {incorrect treatment of linear momentum, angular momentum and energy induces} lower bounds for $L^2$ velocity error, and EMAC treats these quantities more accurately. Results of numerical tests for channel flow past a cylinder and 2D Kelvin-Helmholtz instability are also given, both of which show that the advantages of EMAC over the skew-symmetric formulation increase as the Reynolds number gets larger and for longer simulation times.
description: 21 pages, 5 figures
Fully Developed Turbulence in the view of Horizontal Visibility Graphs
Creators: name: Manshour, Pouya
name: Tabar, M. Reza Rahimi
name: Peinke, Joachim
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We employ the horizontal visibility algorithm to map the velocity and acceleration time series in turbulent flows with different Reynolds numbers, onto complex networks. The universal nature of velocity fluctuations in high Reynolds turbulent Helium flow is found to be inherited in the corresponding network topology. The degree distributions of the acceleration series are shown to have stretched exponential forms with the Reynolds number dependent fitting parameter. Furthermore, for acceleration time series, we find a transitional behavior in terms of the Reynolds number in all network features which is in agreement with recent empirical studies.
Data-driven prediction of the equivalent sand-grain height in rough-wall turbulent flows
Creators: name: Jouybari, Mostafa Aghaei
name: Yuan, Junlin
name: Brereton, Giles J.
name: Murillo, Michael S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper investigates a long-standing question about the effect of surface roughness on turbulent flow: what is the equivalent roughness sand-grain height for a given roughness topography? Deep Neural Network (DNN) and Gaussian Process Regression (GPR) machine learning approaches are used to develop a high-fidelity prediction approach of the Nikuradse equivalent sand-grain height $k_s$ for turbulent flows over a wide variety of different rough surfaces. To this end, 45 surface geometries were generated and the flow over them simulated at $\hbox{Re}_τ=1000$ using direct numerical simulations. These surface geometries differed significantly in moments of surface height fluctuations, effective slope, average inclination, porosity and degree of randomness. Thirty of these surfaces were considered fully-rough and they were supplemented with experimental data for fully-rough flows over 15 more surfaces available from previous studies. The DNN and GPR methods predicted $k_s$ with an average error of less than 10% and a maximum error of less than 30%, which appears to be significantly more accurate than existing prediction formulas. They also identified the surface porosity and the effective slope of roughness in the spanwise direction as important factors in drag prediction.
TA-designed vs. research-oriented problem solutions
Creators: name: Lin, Shih-Yin
name: Singh, Chandralekha
name: Mamudi, William
name: Henderson, Charles R.
name: Yerushalmi, Edit
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: In order to study graduate teaching assistants (TAs) beliefs and values about the design of instructor problem solutions, twenty-four TAs were provided with different solutions and asked to discuss their preferences for prominent solution features. TAs preferences for solution features were examined in light of the modeling of expert-like problem solving process as recommended in the literature. Results suggest that while many of the features TAs valued align with expert-like problem solving approaches, they noticed primarily "surface features" of solutions. Moreover, self-reported preferences did not match well with the solutions TAs wrote on their own.
description: arXiv admin note: text overlap with arXiv:1602.05727
Was nützt, was schadet, was ist ohne Effekt? : die jugendstrafrechtlichen Sanktionen auf dem Prüfstand
Creators: name: Meier, Bernd-Dieter
Publisher: name: Universität Tübingen
Year: 2010
Subjects: subject: Deutschland
subject: Jugendstrafrecht
subject: Sanktion
subject: Rückfallkriminalität

description: akzeptierte Manuskriptversion
On the morphology of $γ-$ray emission induced by $e^{\pm}$ from annihilating self-interacting dark matter
Creators: name: Cui, Ming-Yang
name: Zhang, Cun
name: Zong, Hong-Shi
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: With the Fermi-LAT data quite a few research groups have reported a spatially extended GeV $γ$-ray excess surrounding the Galactic Center (GC). The physical origin of such a GeV excess is still unclear and one interesting possibility is the inverse Compton scattering of the electrons/positrons from annihilation of self-interacting dark matter (SIDM) particles with the interstellar optical photons. In this work we calculate the morphology of such a kind of $γ$-ray emission. For the annihilation channel of $\barχχ\rightarrow ϕϕ\rightarrow e^{+}e^{-}e^{+}e^{-}$, the inverse Compton scattering (ICS) dominates over the bremsstrahlung on producing the GeV $γ$-ray emission. For the SIDM particles with a rest mass $m_χ\sim $ tens GeV that may be favored by the modeling of the Galactic GeV excess, the ICS radiation at GeV energies concentrates along the Galactic plane. The degrees of asymmetry high up to $\geq 0.3$ are found in some regions of interest, which in turn proposes a plausible test on the SIDM interpretation of the GeV excess.
description: 9 pages, 6 figures, Phys. Rev. D in press
Antifragility Predicts the Robustness and Evolvability of Biological Networks through Multi-class Classification with a Convolutional Neural Network
Creators: name: Kim, Hyobin
name: Muñoz, Stalin
name: Osuna, Pamela
name: Gershenson, Carlos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Machine Learning (cs.LG)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Robustness and evolvability are essential properties to the evolution of biological networks. To determine if a biological network is robust and/or evolvable, it is required to compare its functions before and after mutations. However, this sometimes takes a high computational cost as the network size grows. Here we develop a predictive method to estimate the robustness and evolvability of biological networks without an explicit comparison of functions. We measure antifragility in Boolean network models of biological systems and use this as the predictor. Antifragility occurs when a system benefits from external perturbations. By means of the differences of antifragility between the original and mutated biological networks, we train a convolutional neural network (CNN) and test it to classify the properties of robustness and evolvability. We found that our CNN model successfully classified the properties. Thus, we conclude that our antifragility measure can be used as a predictor of the robustness and evolvability of biological networks.
description: 22 pages, 10 figures
Coherent dynamics and decoherence in a superconducting weak link
Creators: name: Peltonen, J. T.
name: Peng, Z. H.
name: Korneeva, Yu. P.
name: Voronov, B. M.
name: Korneev, A. A.
name: Semenov, A. V.
name: Gol'tsman, G. N.
name: Tsai, J. S.
name: Astafiev, O. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate coherent dynamics of quantized magnetic fluxes in a superconducting loop with a weak link - a nanobridge patterned from the same thin NbN film as the loop. The bridge is a short rounded shape constriction, close to 10 nm long and 20 - 30 nm wide, having minimal width at its center. Quantum state control and coherent oscillations in the driven time evolution of the tunnel-junctionless system are achieved. Decoherence and energy relaxation in the system are studied using a combination of microwave spectroscopy and direct time-domain techniques. The effective flux noise behavior suggests inductance fluctuations as a possible cause of the decoherence.
description: 5 pages, 3 figures
Failure Analysis and Design Modification of Vehicle Drive Shaft
Creators: name: Mengistu, Daniel
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Driveshaft, Splines, Fillet radius, Von-Mises stress, Fatigue life

description: The driveshaft is one of the most commonly failed components in vehicles. Recent studies
 show that fatigue cracks that initiate in the region of the output splines are the main cause
 of the failure. This study was mainly aimed at identifying the effects of the spline root fillet
 radius and the number of teeth on the design modification of the driveshaft. In this regard,
 the Finite element method was incorporated to analyze the total deformation, the local
 stress concentration around the critical areas under the static operating conditions, and
 fatigue behaviors during the operation. Moreover, theoretical calculations were used to
 evaluate the equivalent (Von-mises) stress and the factor of safety of the driveshaft around
 the output splines according to ANSI standard. The theoretical calculations of the
 equivalent stress under the static conditions and the factor of safety were used as a
 benchmark for the simulations, and the results are in good agreement with each other.
 Moreover, from the plot of the effect of the shoulder fillet on the stress concentration, the
 optimum fillet radius was found and used in the design modification of the driveshaft.
 The results of the static analysis show that the maximum equivalent stress around the root
 of the splines was reduced by 11.4% as the size of root fillet radius increased. Furthermore,
 it was shown that, by decreasing the number of the splines, the size of the fillet radius can
 be increased, and as the number of splines decreased from 22 to 18, the equivalent stress
 was reduced by 19.6%. The results of the fatigue analysis showed that increasing the fillet
 radius and decreasing the number of splines can improve the fatigue behavior of the
 driveshaft significantly. It was observed that the fatigue life was almost doubled, the
 damage was decreased by 81.6%, factor of safety had increased by 155%. However, the
 minimum number of splines that can efficiently transmit the required torque without
 slippage needs further study.
A geometric interpretation of zonostrophic instability
Creators: name: Kontogiannis, Georgios
name: Bakas, Nikolaos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The zonostrophic instability that leads to the emergence of zonal jets in barotropic beta-plane turbulence was analyzed through a geometric decomposition of the eddy stress tensor. The stress tensor is visualized by an eddy variance ellipse whose characteristics are related to eddy properties. The tilt of the ellipse principal axis is the tilt of the eddies with respect to the shear, the eccentricity of the ellipse is related to the eddy anisotropy, while its size is related to the eddy kinetic energy. Changes of these characteristics are directly related to the vorticity fluxes forcing the mean flow. The statistical state dynamics of the turbulent flow closed at second order was employed as it provides an analytic expression for both the zonostrophic instability and the stress tensor. For the linear phase of the instability, the stress tensor was analytically calculated at the stability boundary. For the non--linear equilibration of the instability the tensor was calculated in the limit of small supercriticality in which the amplitude of the jet velocity follows Ginzburg--Landau dynamics. It is found that dependent on the characteristics of the forcing, the jet is accelerated either because it primarily anisotropizes the eddies so as to produce upgradient fluxes or because it changes the eddy tilt. The instability equilibrates as these changes are partially reversed by the non--linear terms. Parameterizations of the ellipse characteristics are also discussed.
Experimental study on the Traction Resistance of Sand Soil Treated with Corncob Ash
Creators: name: Hailu Abera
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: stabilizer, sand soil, corncob ash, tensile strength, agglomeration, bond dissociation, segregation, floating

description: The need to stabilize soil has been the interest of researchers because of the crack failure often
 occurred to untreated soil. Recent reports are showing that the traction failure of structure
 basement and route-ways are the most common failure problem observed. Hence, in this
 experimental study a soil sample was collected from around Adama town (Awash Malkasa) area,
 sieved to make consistent particle size, Atterberg limit test , moisture content and the specimen
 was prepared following the ASTM standard procedure. The proposed stabilizer, corncob ash was
 mixed with the sand soil, and then the effectiveness of a waste-based binder (corncob) ash to
 stabilize sand soils was studied thoroughly. The geotechnical characteristics of the various
 combinations of samples were investigated through compressive, flexural and tensile strength
 testing with 0.1%, 0.5 %, 1 %, 2 %, and 5 % of corncob ash binder were mixed with sand soil
 and casted to cylinder and rectangular shape. It was recorded that corncob ash improved the
 strength of sand soil allowing the possibility of controlling micro crack formation of the soil. The
 compressive strength of cylinder sample was increased by 58.4 % at 0.5 % of corncob ash. The
 0.5 % of corncob ash enhanced the flexural strengths of the beams by 59.6 %. However the
 tensile strength was increased by 43.1 % at 28 days compared to the specimens without corncob
 ash with 0.5 % corncob ash added to soil sample. As the percentage of corncob ash increases
 beyond 0.5 %, the soil strength decreases due to segregation and floating tendency of the
 corncob ash agglomeration and dissociation of bond between the particles.
Experimental Study on the Effect of Wood Species on The Performance of Wood Plastic Composite
Creators: name: Murad, Abraham
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: WPCs Wood species Mechanical properties Water absorption property

description: The actual demand for new materials has motivated the research of alternative materials
 especially, composites materials. With its market demand expands and increased
 application areas, products of wood plastic composite (WPC) have been developing and
 growing rapidly in many countries over the last decades. There are a lot of studies on
 WPCs in which most of them are not focused on the effect of wood species on the
 performance of wood-plastic composites (WPCs). This paper attempt to investigate the
 effect of wood species which are waste from furniture industries on the performance of
 wood-plastic composites (WPCs). 30wt% of Cordia Africana’s /wanza’s/ and 30wt%
 Austria pine’s wood species fine sawdust separately used with 70wt% of pure highdensity polyethylene (HDPE) in two samples and the mixture of both species sawdust
 in 15wt% of each in another sample were used to prepare the samples and studied the
 performance of the resulted composites. The composites were tested with tensile and
 impact tests followed by morphological analysis, in addition, a physical property test
 was also performed which is the water absorption test. The best interfacial bonding
 between matrix and reinforcement and the maximum tensile strength of the composite
 which is, 15.465 MPa was found at a mixture of 15wt% Cordia Africana’s /wanza/ and
 15wt% of Austria pine’s sawdust with 70wt% of pure HDPE. However, compared with
 the pure HDPE the reduction of impact strength with the addition of wood was also
 observed. Even though the pure HDPE had the best water absorption property than the
 composite samples, composite from 15wt% Cordia Africana’s /wanza/, 15wt% of
 Austria pine’s sawdust and 70wt% of pure HDPE gave good water absorption property.
 Wood species in the wood plastic composite is an essential factor for the performance
 of WPCs.