cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A study of broadband Faraday rotation and polarization behaviour over 1.3--10 GHz in 36 discrete radio sources
Creators: name: Anderson, C. S.
name: Gaensler, B. M.
name: Feain, I. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a broadband polarization analysis of 36 discrete polarized radio sources over a very broad, densely-sampled frequency band. Our sample was selected on the basis of polarization behaviour apparent in narrowband archival data at 1.4 GHz: half the sample show complicated frequency-dependent polarization behaviour (i.e. Faraday complexity) at these frequencies, while half show comparatively simple behaviour (i.e. they appear Faraday simple). We re-observed the sample using the Australia Telescope Compact Array (ATCA) in full polarization, with 6 GHz of densely sampled frequency coverage spanning 1.3 to 10 GHz. We have devised a general polarization modelling technique that allows us to identify multiple polarized emission components in a source, and to characterize their properties. We detect Faraday complex behaviour in almost every source in our sample. Several sources exhibit particularly remarkable polarization behaviour. By comparing our new and archival data, we have identified temporal variability in the broadband integrated polarization spectra of some sources. In a number of cases, the characteristics of the polarized emission components, including the range of Faraday depths over which they emit, their temporal variability, spectral index, and the linear extent of the source, allow us to argue that the spectropolarimetric data encodes information about the magnetoionic environment of active galactic nuclei themselves. Furthermore, the data place direct constraints on the geometry and magnetoionic structure of this material. We discuss the consequences of restricted frequency bands on the detection and interpretation of polarization structures, and implications for upcoming spectropolarimetric surveys.
description: Accepted for publication in ApJ on 31 March 2016. 48 pages total (14 pages text), 63 figures, 6 tables
title: Modelling of the transient electric field in multilayer dielectric composites under impulsive HV energization
Creators: name: Wong, Timothy
name: Timoshkin, Igor
name: MacGregor, Scott
name: Wilson, Mark
name: Given, Martin
Publisher: name: Strathprints - University of Strathclyde
Year: 2022

description: This article presents the theoretical analysis of composite electrical insulation, formed from layered dielectric materials and subjected to impulsive energization. One-dimensional planar and cylindrical geometries were considered, consisting of an arbitrary number of layers with arbitrary relative permittivity and electrical conductivity. Analytical solutions have been succesfully derived for the time-dependent electric field inside the i-th layer. To demonstrate the usage of the model under complex multilayer topologies where analytical solutions are nontrivial, the characteristics of a 20–layer graded composite under microsecond and sub-microsecond impulses were analyzed and validated against a finite-element solver. Results indicate that the transient electric field response under impulsive energization is strongly dependent on the interplay between the composite relaxation time constants and the characteristic timescales associated with the applied impulse. The model is a further development for the design and coordination of functionally graded materials (FGMs) and composite insulation for high voltage system design. This is particularly relevant under fast-rising impulsive conditions as often encountered in many pulsed power applications.
title: Prototypical Realization of Fully Automated 3D-Printing of Reinforced Concrete Using AMoRC Method
Creators: name: Zhang, Sisi
name: Claßen, Martin
name: Olesch, Mirco
name: Mäde, Konrad
name: Sharma, Rahul
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: additive manufacturing
subject: 3D printing of reinforced concrete
subject: AMoRC method
subject: arc stud welding
subject: fork-shaped printing head
subject: 62

description: This paper presents the prototypical implementation of a novel 3D printing process for reinforced concrete structures called Additive Manufacturing of Reinforced Concrete (AMoRC), by showcasing the production of a half-meter-high S-shaped reinforced concrete wall within the laboratories at Institute of Structural Concrete at RWTH Aachen using two robotic systems. The process consists of a continuous concrete extrusion process and an intermittent arc stud welding process, both carried out by a robotic arm respectively. To avoid collision in the first step, the entire printing process is carried out by the robot for concrete printing and the robot for reinforcement welding in alternation, whereby iterative steps are required to create the entire reinforced concrete demonstrator. Segmented rebars of limited length were welded into a spatial reinforcement mesh and then enclosed by the 3D-printed concrete using an innovative fork-shaped printing head with two nozzles, spaced at an adjustable distance to accommodate varying reinforcement diameters. A specialized clamping mechanism was developed for the welding pistol in the welding process at the Welding and Joining Institute at RWTH. The pursuit of fully automated 3D-printing of reinforced concrete involves the following core technical procedures: (1) 3D concrete printing (3DCP) with programmed robot paths, (2) robotic charging of reinforcement studs, (3) robotic welding of the vertical reinforcement, (4) robotic laying of the longitudinal reinforcement, (5) robotic welding of the longitudinal reinforcement.
description: Digital Concrete 2024 - Supplementary Proceedings
The study of anti-hypertensive effect of ellagitannin geraniin in a rat model of diet-induced obesity
Creators: name: GOH, BOON HEE
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 320101
subject: Cardiology (incl. cardiovascular diseases)
classificationCode: 340502
subject: Natural products and bioactive compounds

description: Our group had previously reported that geraniin, an ellagitannin, induced a potent anti-hypertensive effect in a diet-induced obese animal model, accompanied by an improvement of blood glucose and lipid levels. Therefore, in this study, we aimed to further decipher the blood pressure-lowering mechanisms of geraniin. Indeed, we reported that geraniin supplementation effectively improved abnormal structural changes in the thoracic aorta by inhibiting the excessive production of superoxide radicals and the overactivation of circulating leukocytes. Besides, geraniin also successfully normalized the overexpression of genes involved in steroid and complement factor production in the gonadal adipose tissue. Altogether, this is the first time it was unraveled that geraniin might abrogate hypertensive vascular remodeling through modulating the bioactive factor production in the adipose tissue.
The Impact of Molecular Gas on Mass Models of Nearby Galaxies
Creators: name: Frank, Bradley S.
name: de Blok, W. J. G.
name: Walter, F.
name: Leroy, A.
name: Carignan, C
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present CO velocity fields and rotation curves for a sample of nearby galaxies, based on data from the HERACLES survey. We combine our data with literature THINGS, SINGS and KINGFISH results to provide a comprehensive sample of mass models of disk galaxies inclusive of molecular gas. We compare the kinematics of the molecular (CO from HERACLES) and atomic (${\rm H{\scriptstyle I}}$ from THINGS) gas distributions to determine the extent to which CO may be used to probe the dynamics in the inner part of galaxies. In general, we find good agreement between the CO and ${\rm H{\scriptstyle I}}$ kinematics with small differences in the inner part of some galaxies. We add the contribution of the molecular gas to the mass models in our galaxies by using two different conversion factors $\mathrm{α_{CO}}$ to convert CO luminosity to molecular gas mass surface density - the constant Milky Way value and the radially varying profiles determined in recent work based on THINGS, HERACLES and KINGFISH data. We study the relative effect that the addition of the molecular gas has upon the halo rotation curves for Navarro-Frenk-White (NFW) and the observationally motivated pseudo-isothermal halos. The contribution of the molecular gas varies for galaxies in our sample - for those galaxies where there is a substantial molecular gas content, using different values of $\mathrm{α_{CO}}$ can result in significant differences to the relative contribution of the molecular gas and, hence, the shape of the dark matter halo rotation curves in the central regions of galaxies.
description: 42 pages, 38 figures, accepted by AJ
Impact of high-pressure homogenization pretreatment combined with different extraction and drying methods on the recovery of curcumin from turmeric and 6-gingerol from ginger
Creators: name: ARACHCHILAGE, DILUKSHI VICHAKSHANA KARUNASENA GINITHILLAWALA
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 300607
subject: Food technology
classificationCode: 321002
subject: Food properties (incl. characteristics and health benefits)
classificationCode: 300699
subject: Food sciences not elsewhere classified

description: Curcumin and 6-gingerol are the main bioactive compounds extracted from the rhizomes of turmeric and ginger, respectively. These bioactive compounds exhibit extensive biological activities and health benefits. This thesis examined the impact of high-pressure homogenization pretreatment to increase the recovery of curcumin and 6-gingerol. Furthermore, curcumin and 6-gingerol content and antioxidant activity of extracts obtained from different extraction and drying method combinations were analyzed. The results prove that high-pressure homogenization significantly enhanced the recovery of curcumin and 6-gingerol, whereby different extraction and drying combinations influenced the extraction yield and antioxidant activity of turmeric and ginger extracts.
title: Hybrid Approaches Towards 3D Concrete Printing for Lightweight Reinforced Concrete Structures
Creators: name: Meibodi, Mania
name: Lin, Yuxin
name: Chen, Hao
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing
subject: topology optimization
subject: complex geometries
subject: sequential casting of set on demand concrete
subject: 62

description: 3D Concrete Printing (3DCP) has paid little attention to producing material-efficient parts. Material optimization methods, such as topology optimization, often result in forms with complex geometries—extreme overhangs and multi-branching—that are challenging to achieve in large-scale 3DCP. The limited studies on 3DCP of topology-optimized forms often (a) use excessive supporting material, resulting in waste, or (b) discretize topology-optimized forms into simpler components that are later assembled, leading to labor-intensive assembly and accuracy errors. This research seeks to enable the 3D concrete printing of such structures in a streamlined process, eliminating the need for discretization and support materials. To prevent collapse during the 3D printing of extreme overhangs, we explore a method that combines 3DCP with the simultaneous casting of fast-setting concrete materials. For precise concrete deposition that accurately follows the contours of a shape, we introduce topology-informed non-planar printpath and a variable material deposition rate. The method is investigated through a construction scale load-bearing wall, Branch Wall, with steep cantilever branches and in-between thin surfaces and a series of S-Shape specimens (230 mm diameter and 500 mm height) produced through simultaneous 3DCP and casting of fast-setting concrete.
description: Digital Concrete 2024 - Supplementary Proceedings
Detection of lensing substructure using ALMA observations of the dusty galaxy SDP.81
Creators: name: Hezaveh, Yashar D.
name: Dalal, Neal
name: Marrone, Daniel P.
name: Mao, Yao-Yuan
name: Morningstar, Warren
name: Wen, Di
name: Blandford, Roger D.
name: Carlstrom, John E.
name: Fassnacht, Christopher D.
name: Holder, Gilbert P.
name: Kemball, Athol
name: Marshall, Philip J.
name: Murray, Norman
name: Levasseur, Laurence Perreault
name: Vieira, Joaquin D.
name: Wechsler, Risa H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the abundance of substructure in the matter density near galaxies using ALMA Science Verification observations of the strong lensing system SDP.81. We present a method to measure the abundance of subhalos around galaxies using interferometric observations of gravitational lenses. Using simulated ALMA observations, we explore the effects of various systematics, including antenna phase errors and source priors, and show how such errors may be measured or marginalized. We apply our formalism to ALMA observations of SDP.81. We find evidence for the presence of a $M=10^{8.96\pm 0.12} M_{\odot}$ subhalo near one of the images, with a significance of $6.9σ$ in a joint fit to data from bands 6 and 7; the effect of the subhalo is also detected in both bands individually. We also derive constraints on the abundance of dark matter subhalos down to $M\sim 2\times 10^7 M_{\odot}$, pushing down to the mass regime of the smallest detected satellites in the Local Group, where there are significant discrepancies between the observed population of luminous galaxies and predicted dark matter subhalos. We find hints of additional substructure, warranting further study using the full SDP.81 dataset (including, for example, the spectroscopic imaging of the lensed carbon monoxide emission). We compare the results of this search to the predictions of $Λ$CDM halos, and find that given current uncertainties in the host halo properties of SDP.81, our measurements of substructure are consistent with theoretical expectations. Observations of larger samples of gravitational lenses with ALMA should be able to improve the constraints on the abundance of galactic substructure.
description: 18 pages, 13 figures, Comments are welcome
title: Determination of Print Speed Based on The Fresh Mechanical Strength Over Time of Additively Constructed Concrete by Unconfined Compression
Creators: name: Negron-McFarlane, Christian
name: Kreiger, Eric
name: Kreiger, Megan
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: additive construction
subject: 3D printing
subject: buildability
subject: unconfined compression
subject: layer deposition rate
subject: 62

description: Additive construction is a complex process that is influenced by different factors, such as printing parameters, design and construction, as well as materials properties. Since no formwork is used, a fundamental understanding of shape stability and print stability is required to ensure the successful completion of printed components. Additionally, utilizing additive construction in remote field applications increases the variables associated with printing and requires a quantifiable methodology for both laboratory and on-site to maintain quality control. This study focuses on the use of the unconfined compression test to characterize the buildability of the fresh additively constructed concrete with 9.5 mm aggregates. Mechanical properties, such as load and elastic modulus gain, were evaluated in addition to plate buckling theory to determine the print stability of the printing process based on the two primary failure mechanisms: plastic collapse and elastic buckling. This study identifies a method of determining failure parameters to identify the layer deposition limit and print speed to decrease failure during the printing process.
description: Digital Concrete 2024 - Supplementary Proceedings
Accretion Onto a Charged Higher-Dimensional Black Hole
Creators: name: Sharif, M.
name: Iftikhar, Sehrish
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper deals with the steady-state polytropic fluid accretion onto a higher-dimensional Reissner-Nordstr$\ddot{o}$m black hole. We formulate the generalized mass flux conservation equation, energy flux conservation and relativistic Bernoulli equation to discuss the accretion process. The critical accretion is investigated by finding critical radius, critical sound velocity and critical flow velocity. We also explore gas compression and temperature profiles to analyze the asymptotic behavior. It is found that the results for Schwarzschild black hole are recovered when $q=0$ in four dimensions. We conclude that accretion process in higher dimensions becomes slower in the presence of charge.
description: 18 pages, 2 figures, accepted for publication in EPJC
The role of the disulfide linkage in insulin and conotoxin peptides: a Molecular Dynamics and Quantum Mechanical investigation
Creators: name: ROBINSON, MICHAEL IAN
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 340701
subject: Computational chemistry

description: This thesis is a computational investigation into an important part of how proteins are held together by a specific bond, and why this bond can be changed to give better diabetes treatments and better painkillers. It identifies why some of these different bonds make biological function worse by damaging the structure of the protein, and it provides evidence for why some of these different bonds give better function by increasing flexibility or adopting specific structures.
A Combinatorial Approach to the Symmetry of $q,t$-Catalan Numbers
Creators: name: Lee, Kyungyong
name: Li, Li
name: Loehr, Nicholas A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A19, 05A17, 05E05

description: The \emph{$q,t$-Catalan numbers} $C_n(q,t)$ are polynomials in $q$ and $t$ that reduce to the ordinary Catalan numbers when $q=t=1$. These polynomials have important connections to representation theory, algebraic geometry, and symmetric functions. Haglund and Haiman discovered combinatorial formulas for $C_n(q,t)$ as weighted sums of Dyck paths (or equivalently, integer partitions contained in a staircase shape). This paper undertakes a combinatorial investigation of the joint symmetry property $C_n(q,t)=C_n(t,q)$. We conjecture some structural decompositions of Dyck objects into "mutually opposite" subcollections that lead to a bijective explanation of joint symmetry in certain cases. A key new idea is the construction of infinite chains of partitions that are independent of $n$ but induce the joint symmetry for all $n$ simultaneously. Using these methods, we prove combinatorially that for $0\leq k\leq 9$ and all $n$, the terms in $C_n(q,t)$ of total degree $\binom{n}{2}-k$ have the required symmetry property.
War Diary of 1st Battalion Canadian Scottish Regiment, Vol. 66 - Appendix 02
Creators: name: Canada. Canadian Army. Canadian Scottish Regiment (Princess Mary's)
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Canada. Canadian Army. Canadian Scottish Regiment (Princess Mary's)
subject: War diaries
valueUri: http://id.worldcat.org/fast/1745536
subject: World War (1939-1945)
valueUri: http://id.worldcat.org/fast/1180924
subject: Canada. Canadian Army
valueUri: http://id.worldcat.org/fast/531187

description: This appendix consists of "The Command Post" description by R.H. Pensford, report called The Work of the Signals Platoon During "Veritable", and a report called The Work of the M.I.R. Staff During Operation "Veritable" by R.J. Duncan (Medical Sgt.).
title: A New Approach for Automated Design and Robot-Assisted Production of Structurally Optimised Reusable Concrete Building Elements
Creators: name: Kromoser, Benjamin
name: Gappmaier, Peter
name: Ahmed, Iyad
name: Reichenbach, Sara
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: digital fabrication
subject: topology optimisation
subject: strut-and-tie-modelling
subject: robot production cells
subject: modular assembly
subject: automated shuttering
subject: 62

description: Concrete, the most used construction material worldwide, currently lacks realistic alternatives in terms of performance and availability. Industrialisation resulted in the reduction of price, especially in developed countries, with 1m³ of concrete equivalent to only approximately 1.25 hours of skilled labour in Europe. As a result, the relevance of optimizing the material use diminished, leading to an underutilization of the mechanical properties and consequently, a high environmental impact. Moreover, the current inefficient production approaches hinder its potential for efficient use of the material itself. This contribution presents a new automated design and production approach with focus on increasing the resource efficiency within concrete prefabrication. The design concept represents an automated topology optimisation with a strut-and-tie model running in the background. The production approach is based on a modular assembly concept realised by robot production islands, which can be used individually or in groups either in a prefabrication plant or for on-site production. The backbone is a new automated shuttering concept which is open for different concrete mixtures and therefore also for further developments on material side. This, combined with the development of a modular component kit, allowing for a reuse of the elements, offers the industry the possibility of a higher value circular economy. Within the presentation the concept is introduced alongside first preliminary experiments and an outlook on further planned research demand.
description: Digital Concrete 2024 - Supplementary Proceedings
Suppressing supersymmetric flavor violations through quenched gaugino-flavor interactions
Creators: name: Wells, James D.
name: Zhao, Yue
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Realizing that couplings related by supersymmetry (SUSY) can be disentangled when SUSY is broken, it is suggested that unwanted flavor and CP violating SUSY couplings may be suppressed via quenched gaugino-flavor interactions, which may be accomplished by power-law running of sfermion anomalous dimensions. A simple theoretical framework to accomplish this is exemplified and the defeated constraints are tallied. One key implication of the scenario is the expectation of enhanced top, bottom and tau production at the LHC, accompanied by large missing energy. Also, direct detection signals of dark matter may be more challenging to find than in conventional SUSY scenarios.
description: 17 pages, 1 figure
Determination of Electromagnetic Material Properties of Ferromagnetic Stainless Steel Used in Domestic Induction Heating Cookware
Creators: name: Rehm, Felix
name: Breining, Patrick
name: Hiller, Marc
Publisher: name: Institute of Electrical and Electronics Engineers (IEEE)
Year: 2022

description: Design-oriented modeling approaches, such as finite element analyses (FEA), rely on accurate material data for the modeled hardware. In the case of cookware used in domestic induction heating (IH) systems, manufacturers rarely provide the necessary data. Therefore, this contribution presents results for the electromagnetic material properties of ferromagnetic stainless steel, typically used in cookware for domestic IH. The magnetic material properties are modeled using Jiles-Atherton hysteresis model. With the used measurement method, less effort in preparation of suited material specimen is needed compared to conventional measurement methods. The presented results for the magnetic material properties are validated using Epstein frame measurements. It is shown that the hysteresis curves are similar to each other for both measurement methods. Regarding the specific electrical resistance, the results are validated using a microhmmeter. The values determined for the specific resistance show good accordance for the different measurement methods.
Die Bestreitung des Unterhalts der Kirche durch freiwillige Beiträge
Creators: name: Bassett, William W.
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 14 Nr. 8/9 (1978): Concilium: Internationale Zeitschrift für Theologie, Band 14, Heft 8/9
Supercritical fluid extraction, encapsulation of chebulagic acid from Terminalia bellirica fruits and its food application
Creators: name: GUGGILLA, MRUDULA
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 300607
subject: Food technology

description: This thesis investigates the extraction and encapsulation of chebulagic acid (CA) from Terminalia bellirica and its addition to orange juice. Supercritical fluid extraction using 50% ethanol as a modifier was the most efficient method, yielding 79.92% (w/w) CA with 96.9% purity. Encapsulation with maltodextrin and gum Arabic improved water solubility, masked bitterness, and increased bioavailability. Encapsulated CA (ECA) displayed antimicrobial activity against E. coli and B. cereus and had storage stability for 640 days at 25±2˚C. Adding ECA to orange juice increased storage stability without impacting sensory attributes. This study proposes a promising method for utilizing CA in food applications.
Propagation of Light in a Hot and Dense Medium
Creators: name: Masood, Samina
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Photons, as quanta of electromagnetic fields, determine the electromagnetic properties of an extremely hot and dense medium. Considering the properties of photons in the interacting medium of charged particles, we explicitly calculate the electromagnetic properties such as the electric permittivity, magnetic permeability, refractive index and the propagation speed of electromagnetic signals in extremely hot and dense background in cosmos. Photons acquire dynamically generated mass in a medium. The screening mass of photon, Debye shielding length and the plasma frequency are calculated as functions of statistical parameters of the medium. We study the properties of the propagating particles in astrophysical systems of distinct statistical conditions. The modifications in the medium properties lead to the equation of state of the system. We mainly calculate all these parameters for extremely high temperatures of the early universe.
description: 18 pages
title: Structuration Rate Measurement Using a Digital Pocket Vane
Creators: name: Demont, Léo
name: Mesnil, Romain
name: Caron, Jean-François
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: extrusion-based additive manufacturing
subject: quality control
subject: pocket shear vane
subject: structuration rate
subject: precision
subject: process variables
subject: 62

description: Digital Concrete 2024 - Supplementary Proceedings
title: Large-scale Monolithic Printing with Ready-Mixed Concrete: Challenges and Solutions
Creators: name: Will, Frank
name: Storch, Florian
name: Plaschnick, Paul
name: Taubert, Markus
name: Butler, Marko
name: Mechtcherine, Viktor
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing
subject: extrusion
subject: vibration
subject: coarse-grained concrete
subject: ready-mixed concrete
subject: 62

description: Currently, most research work in the field of concrete 3D printing is focused on the use of fine-grained mortar. These building materials are only suitable to a limited extent for large-format, monolithic printing of building structures because they do not comply with existing concrete standards, require a higher binder content, and generally have significant disadvantages in terms of economic and ecological assessments compared to standard-conforming ready-mixed concrete. The article reports on the results of a research project in which concrete mixtures with a maximum grain size of 16 mm, largely complying with current regulations, corresponding test methods, and adapted machinery equipment were developed for extrusion-based printing. In addition to selecting a suitable concrete mix design, there are a number of challenges regarding the machinery technology when processing concrete with a maximum grain size of 16 mm. This includes limiting wear on the extruder by selecting a suitable material for the stator, developing a shaping unit for printing variable layer geometries, and geometrically checking the printed filaments cross-sections during the printing process as a basis for controlling the adequate discharge rate. To ensure a continuous and segregation-free material flow throughout the entire print head, which consists of the reservoir, extruder, and shaping unit, the introduction of vibration energy is an option. The available test results are presented, and recommendations are derived based on this. Overall, the results demonstrate that although the automated printing of monolithic structures with standard-compliant ready-mixed concrete presents specific challenges, these can certainly be overcome with careful material selection, machine design, and process engineering.
description: Digital Concrete 2024 - Supplementary Proceedings
Updated Kinematic Constraints on a Dark Disk
Creators: name: Kramer, Eric David
name: Randall, Lisa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We update the method of the Holmberg & Flynn (2000) study, including an updated model of the Milky Way's interstellar gas, radial velocities, an updated reddening map, and a careful statistical analysis, to bound the allowed surface density and scale height of a dark disk. We pay careful attention to the self-consistency of the model, including the gravitational influence of the dark disk on other disk components, and to the net velocity of the tracer stars. We find that the data set exhibits a non-zero bulk velocity in the vertical direction as well as a displacement from the expected location at the Galactic midplane. If not properly accounted for, these features would bias the bound toward low dark disk mass. We therefore perform our analysis two ways. In the first, traditional method, we subtract the mean velocity and displacement from the tracers' phase space distributions. In the second method, we perform a non-equilibrium version of the HF method to derive a bound on the dark disk parameters for an oscillating tracer distribution. Despite updates in the mass model and reddening map, the traditional method results remain consistent with those of HF2000. The second, non-equilibrium technique, however, allows a surface density as large as $14\, M_\odot\,{\rm pc}^{-2}$ (and as small as 0), demonstrating much weaker constraints. For both techniques, the bound on surface density is weaker for larger scale height. In future analyses of Gaia data, it will be important to verify whether the tracer populations are in equilibrium.
description: Accepted for publication in ApJ
Demonstration of polarization sensitivity of emulsion-based pair conversion telescope for cosmic gamma-ray polarimetry
Creators: name: Ozaki, Keita
name: Takahashi, Satoru
name: Aoki, Shigeki
name: Kamada, Keiki
name: Kaneyama, Taichi
name: Nakagawa, Ryo
name: Rokujo, Hiroki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Linear polarization of high-energy gamma-rays (10 MeV-100 GeV) can be detected by measuring the azimuthal angle of electron-positron pairs and observing the modulation of the azimuthal distribution. To demonstrate the gamma-ray polarization sensitivity of emulsion, we conducted a test using a polarized gamma-ray beam at SPring-8/LEPS. Emulsion tracks were reconstructed using scanning data, and gamma-ray events were selected automatically. Using an optical microscope, out of the 2381 gamma-ray conversions that were observed, 1372 remained after event selection, on the azimuthal angle distribution of which we measured the modulation. From the distribution of the azimuthal angles of the selected events, a modulation factor of 0.21 + 0.11 - 0.09 was measured, from which the detection of a non-zero modulation was established with a significance of 3.06 $σ$. This attractive polarimeter will be applied to the GRAINE project, a balloon-borne experiment that observes cosmic gamma-rays with an emulsion-based pair conversion telescope.
title: Real-time monitoring and feedback operation system for 3D-printed concrete based on computer vision
Creators: name: Zhang, Hanghua
name: Hao, Lucen
name: Zhang, Shipeng
name: Xiao, Jianzhuang
name: Poon, Chi-Sun
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 62

description: While 3D-printed concrete (3DPC) has been widely studied and successfully applied in various real-world engineering projects globally, challenges persist in the practical application of 3DPC, with the most significant one being quality monitoring and control [1, 2]. Concrete is batch mixed but continuously extruded in 3D printing process, resulting in instabilities in material status. Therefore, secondary near-nozzle mixing process was proposed [3]. Pre-mixed fresh concrete with a high flowability was secondarily mixed with rheological modifier in the near-nozzle mixer to form printable concrete [1]. The addition rate of admixture during secondary mixing should be matched with the time-dependent concrete fluidity. Consequently, inline monitoring was suggested for printed filament [2] while there is still a lack of research on the feedback system for quality control to realize real-time adjustment operations for 3DPC with the secondary mixing process. This study implements secondary mixing with an accelerator as the chosen strategy for 3DPC, and an intelligent real-time adjustment system based on computer vision is developed for quality control of 3DPC. Visual geometry group (VGG) network [4] was employed to classify the images of printed filament, and a feedback operation system based on this classification results was built to regulate the extrusion rate and material fluidity.
description: Digital Concrete 2024 - Supplementary Proceedings
title: An assessment of the repeatability of 3D printed concrete structures
Creators: name: Hüsken, Götz
name: Jeyifous, Olubunmi
name: Schönsee, Eric
name: Strangfeld, Christoph
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing
subject: repeatability
subject: monitoring
subject: process control
subject: quality control
subject: 62

description: Additive manufacturing of concrete structures, also known as 3D concrete printing, is a technology that received a lot of attention over the past decade due to its financial an ecological advantage as sustainable construction technology. Although several techniques and approaches demonstrate these advantages, quality control during printing is highly challenging and rarely applied and harmonized standards are not existing. Due to the continuous mixing process used in 3D concrete printing, it is impossible to exclude variations in the dry mixture or water content, and a single test sample is insufficient to be representative for the whole structure. A defect in one layer during the printing can affect the entire integrity of the whole structure. This study shows the results of an arch designed as framework structure that was printed multiple times under the same boundary conditions using an extrusion-based 3D concrete printer. Each arch was tested for its mechanical strength and load bearing behavior. The results of the mechanical testing of the printed arches are compared with material data obtained by classical tests and discussed regarding their statistical significance.
description: Digital Concrete 2024 - Supplementary Proceedings
Lectures on approximate groups and Hilbert's 5th problem
Creators: name: Breuillard, Emmanuel
Publisher: name: arXiv
Year: 2015
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 11B30, 20N99

description: This paper gathers four lectures, based on a mini-course at IMA in 2014, whose aim was to discuss the structure of approximate subgroups of an arbitrary group, following the works of Hrushovski and of Green, Tao and the author. Along the way we discuss the proof of the Gleason-Yamabe theorem on Hilbert's 5th problem about the structure of locally compact groups and explain its relevance to approximate groups. We also present several applications, in particular to uniform diameter bounds for finite groups and to the determination of scaling limits of vertex transitive graphs with large diameter.
description: lecture notes to appear in IMA volume of proceedings
War Diary of 1st Battalion Canadian Scottish Regiment, Vol. 66 - Appendix 03
Creators: name: Canada. Canadian Army. Canadian Scottish Regiment (Princess Mary's)
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Canada. Canadian Army. Canadian Scottish Regiment (Princess Mary's)
subject: War diaries
valueUri: http://id.worldcat.org/fast/1745536
subject: World War (1939-1945)
valueUri: http://id.worldcat.org/fast/1180924
subject: Canada. Canadian Army
valueUri: http://id.worldcat.org/fast/531187

description: This appendix consists of "The Rhine River is Our Objective" report with a diagram detailing the narrative.
High precision radial velocities with GIANO spectra
Creators: name: Carleo, I.
name: Sanna, N.
name: Gratton, R.
name: Benatti, S.
name: Bonavita, M.
name: Oliva, E.
name: Origlia, L.
name: Desidera, S.
name: Claudi, R.
name: Sissa, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Radial velocities (RV) measured from near-infrared (NIR) spectra are a potentially excellent tool to search for extrasolar planets around cool or active stars. High resolution infrared (IR) spectrographs now available are reaching the high precision of visible instruments, with a constant improvement over time. GIANO is an infrared echelle spectrograph at the Telescopio Nazionale Galileo (TNG) and it is a powerful tool to provide high resolution spectra for accurate RV measurements of exoplanets and for chemical and dynamical studies of stellar or extragalactic objects. No other high spectral resolution IR instrument has GIANO's capability to cover the entire NIR wavelength range (0.95-2.45 micron) in a single exposure. In this paper we describe the ensemble of procedures that we have developed to measure high precision RVs on GIANO spectra acquired during the Science Verification (SV) run, using the telluric lines as wavelength reference. We used the Cross Correlation Function (CCF) method to determine the velocity for both the star and the telluric lines. For this purpose, we constructed two suitable digital masks that include about 2000 stellar lines, and a similar number of telluric lines. The method is applied to various targets with different spectral type, from K2V to M8 stars. We reached different precisions mainly depending on the H -magnitudes: for H ~ 5 we obtain an rms scatter of ~ 10 m s-1, while for H ~ 9 the standard deviation increases to ~ 50 - 80 m s-1. The corresponding theoretical error expectations are ~4 m s-1 and 30 m s-1, respectively. Finally we provide the RVs measured with our procedure for the targets observed during GIANO Science Verification.
description: 26 pages, 15 figures, 6 tables
title: Nozzle-Integrated Slump Scanner Test: Development of an Automated Shape Stability and Instantaneous Yield Stress Measurement Method for the Set-on-demand 3D Concrete Printing
Creators: name: Rehmann, Atta
name: Kang, Seungwoo
name: Kim, Jung-Hoon
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D printing construction
subject: slump
subject: shape stability
subject: yield stress
subject: real-time assessment
subject: quality control
subject: 62

description: In the process of set-on-demand 3D Concrete Printing (3DCP) construction, maintaining consistent extrusion quality and ensuring that the extruded concrete layers possess sufficient yield stress to support their self-weight is critical. This shape retention capability is a fundamental requirement for the stability of the printed geometry and adherence to the intended print design. Prevalent methods for assessing the shape stability of stiff printed layers, such as comparing the shape of extruded layer with the dimensions of the nozzle, may have limited applicability for the set-on-demand mixtures. With the advancing research and growing interest in 3DCP for set-on-demand mixtures, there is an increasing demand for swift, inline, automated testing methods to assess extruded concrete’s quality, yield stress and shape stability in real-time. In this context, the globally recognized slump test, a standard test for evaluating concrete’s shape retention under self-weight, offers a promising foundation. Leveraging the concrete industry’s familiarity with this test and its well-established correlations with concrete rheology, this study introduces a novel testing system based on the slump test. This system utilizes a customized nozzle to extrude concrete into layers that mimic the geometry of concrete specimens used in the slump test. This study uses depth sensors for generating 3D images of the concrete slump flow and calculates the instantaneous yield stress. The developed system’s performance is validated though real-time printing and monitoring of the slump and shape stability of the concrete printed layers. The developed test is an economical, inline, and automated quality control system.
description: Digital Concrete 2024 - Supplementary Proceedings
The formation of boron sheet at the Ag(111) surface: From clusters, ribbons, to monolayers
Creators: name: Xu, Shao-Gang
name: Zhao, Yu-Jun
name: Liao, Ji-Hai
name: Yang, Xiao-Bao
name: Xu, Hu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Boron (B) sheet has been intently studied and various candidates with vacancies have been proposed by theoretical investigations, including the possible growth on metal surface. However, a recent experiment (Science 350, 1513, 2015) reported that the sheet formed on the Ag(111) surface was a buckled triangular lattice without vacancy. Our calculations combined with High-Throughput screening and the first-principles method demonstrate a novel growth mechanism of boron sheet from clusters, ribbons, to monolayers, where the B-Ag interaction is dominant in the nucleation of boron nanostructures. We have found that the simulated STM image of the sheet with 1/6 vacancies in a stripe pattern is in better agreement with the experimental observation, which is energetically favored during the nucleation and growth.
description: 17 pages, 10 figures
title: Filament Extraction for 3D Printing
Creators: name: Mawas, Karam
name: Maboudi, Mehdi
name: Achanccaray, Pedro
name: Gerke, Markus
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: filament extraction
subject: layer detection
subject: quality inspection
subject: digital fabrication
subject: additive manufacturing
subject: 62

description: Digital Concrete 2024 - Supplementary Proceedings
title: Exploring the Impact of the Pumping Process on the Structural Build-up in the Context of 3D Concrete Printing
Creators: name: Rehmann, Atta
name: Kim, Ik-Gyeom
name: Kim, Jung-Hoon
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D printing construction
subject: structural build up
subject: real-time assessment
subject: quality control
subject: pumping
subject: penetrometry
subject: 62

description: Characterizing the accurate structural build-up of concrete is vital for determining safe vertical construction rates and optimizing design flexibility in 3D concrete printing construction. Printing concrete undergoes the pumping process; however, the pumpings influence on the structural build-up of printing concrete is less explored in the current literature. This study addresses this gap by comparing the structural build-up of non-pumped (unprocessed) with the pumped and extruded (processed) concrete. This study utilized two penetrometer tests and vane shear test to assess the structural build-up on both forms of concrete. Experimental findings highlight a significant disparity in structural build-up rates between pumped and non-pumped concrete, with pumped concrete exhibiting a notably higher structural build-up rate.
description: Digital Concrete 2024 - Supplementary Proceedings
title: A Data-Driven View on Digital Fabrication with Concrete: The Case of Interlayer Bond Strength
Creators: name: Versteege, J.
name: Wolfs, R.
name: Salet, T.
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: data-driven
subject: digital shadow
subject: quality assessment
subject: virtual sensor
subject: interlayer bond strength
subject: 62

description: This paper addresses the potential of data-driven methodologies in enhancing sustainability and efficiency within digital fabrication with concrete (DFC). It emphasizes the role of real-time in-line sensors and their autonomous synchronization into a digital representation of the physical object. This digital representation enables the prediction of variables that are difficult to measure directly, such as the interlayer bond strength (IBS) in 3D concrete printing. For this purpose, a data-driven virtual sensor for the IBS is in development, utilizing machine learning algorithms or other statistical tools to predict its value based on in-line sensory data. The development of such a virtual sensor relies heavily on a dataset where sensory data is paired with the data from experiments performed to determine the IBS. The paper discusses different strategies for this pairing procedure, noting both the predictive performance and practical concerns. The study is contextualized within a 3DCP facility, focusing on a select few of the integrated sensors and showcasing their outcomes in more detail. Using data collected to explore the effects of variable manipulations on the IBS, the paper evaluates three pairing strategies – object scale, layer scale, and specimen scale – for their influence on the resulting dataset's composition. Although the exact impact of these strategies can only be determined after the virtual sensors are finalized, the paper concludes that embracing more detailed data-driven methodologies has the potential to advance process monitoring in DFC.
description: Digital Concrete 2024 - Supplementary Proceedings
Litocampa humilis subsp. comani Conde 1991
Creators: name: Sendra, Alberto
name: Reboleira, Ana Sofia P. S.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplura
Campodeidae
Litocampa
Litocampa humilis
Litocampa humilis comani condé, 1991

description: Litocampa humilis comani Condé, 1991
Litocampa humilis comani Condé, 1991: 245.
Diferencial diagnosis from the f. typ. (Condé 1991; Sendra et al. 2012)
Antennae with 28–31 antennomeres; cupuliform organ with 12–14 complex olfactory chemoreceptors with finger-like expansions along their edges.
Habitat and distribution
A cave-adapted subspecies described from the deep zone of an isolated cave in the Romanian Carpathians near Cluj (Condé 1991), at the eastern of the range of the nominate subspecies.
description: Published as part of Sendra, Alberto & Reboleira, Ana Sofia P. S., 2020, Euro-Mediterranean fauna of Campodeinae (Campodeidae, Diplura), pp. 1-130 in European Journal of Taxonomy 728 on page 102, DOI: 10.5852/ejt.2020.728.1181, http://zenodo.org/record/4316883