cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Letter from Barbara Hepworth to Herbert Read, September 25, [1966?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor) held in the Herbert Read archive at the University of Leeds, UK. The letters span the time period of 1965 to 1968, and discuss art, the art world and their personal lives. Hepworth writes about health issues and Read's courage.
Letter from Barbara Hepworth to Herbert Read, December 20, [1965?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Artists
valueUri: http://id.worldcat.org/fast/817559

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor) held in the Herbert Read archive at the University of Leeds, UK. The letters span the time period of 1965 to 1968, and discuss art, the art world and their personal lives. Barbara Hepworth discusses health issues and asks Herbert Read to write the foreword for her exhibition at Marlborough Gerson, [New York].
title: Experimental set-up for shear and interlayer bonding in a 3D printed concrete framework
Creators: name: Soave, Francesco
name: Muciaccia, Giovanni
name: Ferrara, Liberato
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D printing
subject: intralayer bond strength
subject: steel nails
subject: reinforcement
subject: 62

description: Three-dimensional concrete printing (3DCP) represents a revolutionary advancement in the construction industry, fundamentally reshaping traditional construction methods. This cutting-edge technology not only holds the promise of enabling the construction of architecturally optimized structures but also addresses crucial issues including material conservation and streamlined construction processes. However, the complex nature of 3DCP poses challenges in order to fully unlock its potential. The primary focus is on scrutinizing the bond strength between consecutively deposited layers, a critical factor influencing structural integrity and the overall quality of printed structures. The strength of this bond depends on several factors, including surface moisture, temperature, surface roughness, and the times of the printing process as related to the material strength development, affecting the formation of cold joints and collectively governing structural quality and reliability. Existing literature has explored various methodologies to improve this bonding parameter, such as wire mesh, U-nails, steel reinforcement, and fibers. This study introduces an inventive approach utilizing stainless steel nails for establishing interlayer connections. In the context of this research project, the primary objective was to evaluate the enhancement to bond strength between successive layers of fresh concrete in the additive manufacturing process. A specialized testing configuration, consisting of a shear box equipped with two “chambers”, was employed. In this setup, the initial layer underwent 3D printing in the lower chamber, followed by the deposition of the second layer in the upper chamber, accompanied by the positioning of reinforcement nails. This approach facilitated a meticulous assessment of bond quality between these layers. The methodology enabled the identification of variations in bond strength and allowed for time-dependent tests to monitor the initiation and progression of cold joint formation, if any. Notably, different deposition times for the second layer in the upper chamber were explored, ranging from one minute after the first layer to as long as 60 minutes later, following the insertion of reinforcements. This research has provided valuable insights into the pivotal domain of interlayer bonding in 3DCP, illustrating how the integration of specific reinforcements throughout the structure can enhance this parameter and how it evolves over time.
description: Digital Concrete 2024 - Supplementary Proceedings
Letter from Barbara Hepworth to Herbert Read, [02], [1965-1968?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor) held in the Herbert Read archive at the University of Leeds, UK. The letters span the time period of 1965 to 1968, and discuss art, the art world and their personal lives. Hepworth writes from London and would like to send Read something [ahead of a visit by him to hospital?].
title: Enhancing Early Strength in LC3 3DCP with Advanced Chemical Admixtures
Creators: name: Farra, Ramzi
name: Dhers, Sébastien
name: Leal da Silva, Wilson
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3DCP
subject: chemical admixtures
subject: calcined clay
subject: LC3
subject: sustainability
subject: 62

description: 3D concrete printing (3DCP) holds promise for reducing carbon footprints through waste minimization, localized production, and structural optimization. However, current binder formulations face sustainability challenges, mainly due to the prevalent use of excessive amounts of Ordinary Portland Cement (OPC) to meet 3DCP's workability and pumpability requirements. Extrusion-based 3DCP can, thus, be deemed not environmentally friendly enough unless a substantial decrease in Portland cement content is achieved. Limestone Calcined Clay cement (LC3) presents a promising alternative to the traditional OPC from the environmental standpoint. Nevertheless, the use of LC3 binders imposes challenges in 3DCP applications due to their low early-stage strength. This is a crucial requirement for 3DCP to ensure fast and continuous printing as well as structural stability. To overcome that, we present a solution centered around the integration of innovative admixtures. Specifically, this involves incorporating novel additives, including a retarder admixture to regulate the rheological properties of fresh mortar/concrete and liquid accelerator introduced in the extrusion nozzle. This dual admixture (2k-system) approach aims to control cement hydration evolution selectively, promoting structural formation and enhancing early strength development. To validate the concept, we utilized a commercial LC3-binder. The printing outcome achieved a 3.0 m/h vertical build rate, validating the feasibility of the proposed solution in controlling workability, structural formation, and early strength development.
description: Digital Concrete 2024 - Supplementary Proceedings
Letter from Barbara Hepworth to Herbert Read [01], [1965-1968?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202

description: Barbara Hepworth (English artist and sculptor) held in the Herbert Read archive at the University of Leeds, UK. The letters span the time period of 1965 to 1968, and discuss art, the art world and their personal lives. Hepworth expresses joy for a recent meeting with Read. She urges them both to be free and create.
title: Influence of Printing Parameters on Early-age Shrinkage in 3D Printed Mortar
Creators: name: Harbouz, Ilhame
name: Alam, Syed
name: Loukili, Ahmed
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D printing
subject: cement-based materials
subject: digital image correlation (DIC)
subject: printing parameters
subject: shrinkage
subject: 62

description: As 3D printing has become more prevalent in the construction industry, it is crucial to understand the impact of printing parameters on concrete behavior to ensure the structural integrity and durability of printed elements. The absence of formwork in 3D printing introduces unique factors that can influence the shrinkage behavior of printed concrete at an early age. Accurate characterization of these phenomena is essential for enhancing the structural integrity and dimensional stability of the printed elements. In this study, the early age shrinkage behavior of 3D-printed mortar was evaluated using digital image correlation (DIC), considering two crucial printing parameters: printing speed and printing height. Various combinations of printing speeds and heights were studied to assess their impact on induced deformations. DIC analysis provides insights into how variations in printing parameters affect the shrinkage behavior of mortar. The results showed that higher printing speeds and printing heights lead to increased shrinkage deformation. These findings enable a deeper understanding of the intricate relationship between printing parameters and shrinkage behavior, paving the way for more informed design and construction strategies for 3D printing applications.
description: Digital Concrete 2024 - Supplementary Proceedings
Die Erfahrung des Leidens und der menschlichen Lebensbedingungen im Buddhismus
Creators: name: Bareau, André
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 14 Nr. 6/7 (1978): Concilium: Internationale Zeitschrift für Theologie, Band 14, Heft 6/7
Letter from Barbara Hepworth to Herbert Read, July 09, [1964?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor and, along with Read, a member of the modern art movement Unit One founded by Paul Nash), that span the time period of 1940 to 1965 and discuss their artistic and literary endeavors, philosophical and political views, and personal lives. Hepworth says she is being bullied and blackmailed about something she would like to explore with H.F.
Letter from Barbara Hepworth to Herbert Read, December 04, [1965?]
Creators: name: Hepworth, Barbara, 1903-1975
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Hepworth, Barbara, 1903-1975
valueUri: http://id.worldcat.org/fast/1898202
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Art historians
valueUri: http://id.worldcat.org/fast/815554
subject: Artists--Correspondence
valueUri: http://id.worldcat.org/fast/817571
subject: Artists
valueUri: http://id.worldcat.org/fast/817559
subject: Read, Herbert, 1893-1968
valueUri: http://id.worldcat.org/fast/1754386
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Art movements
valueUri: http://id.worldcat.org/fast/815613
subject: Women artists
valueUri: http://id.worldcat.org/fast/1177159
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945

description: Part of a collection of letters to Sir Herbert Read from Dame Barbara Hepworth (English artist and sculptor and, along with Read, a member of the modern art movement Unit One founded by Paul Nash), that span the time period of 1940 to 1965 and discuss their artistic and literary endeavors, philosophical and political views, and personal lives. A lorry (truck) drove through Hepworth's studio wall.
title: X-Ray Tomography Insights into Early Drying Effects in 3D Concrete Printing
Creators: name: Keita, E.
name: Zuo, Wenqiang
name: Caneda-Martínez, L.
name: Aimedieu, P.
name: Bornert, M.
name: Roussel, N.
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: drying
subject: microstructure
subject: cracks
subject: porosity
subject: 62

description: This study investigates an often overlooked phenomenon of early-age drying-induced shrinkage and microstructural damage in 3D-printed concrete filaments. Our study is based on soft permeable and stiff mortars, emulating the characteristics of 3D printed concrete filaments, including sample geometries, material mix design, material fresh properties, and drying conditions. Notably, our results underscore that drying-induced shrinkage, occurring within a couple of hours, like autogenous shrinkage, reaches around 1%. This early-age shrinkage poses a significant risk to geometrical accuracy and structural integrity, potentially resulting in warping and cracking if left unaddressed. At the material level, our investigation unveils the creation of drying-induced microstructural damages within the initial hours preceding hydration onset. In the stiff mortar, damage occurs similarly to high aspect ratio microcracks typically observed during hydration in sealed samples. Conversely, the soft model mortar exhibits unique damages named "cracklets," characterized by an aspect ratio of approximately ten and widths in the range of a few hundred micrometers. Remarkably, both types of damages manifest as early as one hour into the drying process, a critical insight often overlooked in existing literature. To elucidate the origin of these microstructural damages, an analysis of evaporation was conducted by measuring the drying rate, specifically during the first few thousand seconds. This analysis underscores the crucial roles played by the imposed evaporation regime (homogeneous drying or heterogeneous dry-front propagation) and the kinetics of capillary stress diffusion in the interstitial fluid. This study will help to optimize printing parameters and address structural vulnerabilities by limiting some microstructural defects that may lead to failure.
description: Digital Concrete 2024 - Supplementary Proceedings
Litocampa montana
Creators: name: Sendra, Alberto
name: Reboleira, Ana Sofia P. S.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplura
Campodeidae
Litocampa
Litocampa montana

description: Litocampa montana (Ionescu, 1955)
Campodea (Dicampa) montana Ionescu, 1955: 37, figs a–g.
Diagnosis (Ionescu 1955, Sendra et al. 2012)
Body length 2.0– 2.8 mm; epicuticle without microdenticles; short, smooth clothing setae; antennae with 21–23 antennomeres; sensillum of third antennomere in ventral position; cupuliform organ with four simple olfactory chemoreceptors; 1+1 ma, 1+1 la, 1+1 lp macrosetae on pronotum and mesonotum, 1+1 ma, 1+1 lp on metanotum; short, thin notal macrosetae with one distal barb except lp on pronotum double in length with 3–4 thin barbs along distal half; marginal setae overall not differentiated from clothing setae; without dorsal femoral macrosetae; calcars with barbs almost from their basis; short ventral tibial macrosetae with a small apical barb; smooth apical tarsal setae; subequal elbow-like claws with small smooth lateral crests; 1+1 short ma macrosetae on I–VII urotergites, 1+1 la, 1+1 lp on V– VII urotergites, 1+1 short ma, 3+3 lp on VIII urotergite and 5+5 lp on IX abdominal segment; male with glandular g 1 -setae, subtrapezoidal appendages with glandular a 2 and a 1 -setae; female subcylidric appendages with glandular a 1 -setae; cerci shorter than body with 7 articles covered in long macrosetae with 1–4 long barbs and a few smooth clothing setae.
Habitat and distribution
Soil-dwelling species known from a single locality in southern Carpathians, Romania (Sendra et al. 2012).
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 pages 102-103, DOI: 10.5852/ejt.2020.728.1181, http://zenodo.org/record/4316883
Decompositions of the higher order polars of plane branches
Creators: name: Barroso, Evelia R. García
name: Gwoździewicz, Janusz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: \noindent In \cite{Casas} Casas-Alvero found decompositions of higher order polars of an irreducible plane curve generalizing the results of Merle. We improve his result giving a finer decomposition where we determine the topological type and the number of a kind of branches that we call {\em threshold semi-roots}.
description: 15 pages
Blending stiffness and strength disorder can stabilize fracture
Creators: name: Karpas, Ehud D.
name: Kun, Ferenc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Quasi-brittle behavior where macroscopic failure is preceded by stable damaging and intensive cracking activity is a desired feature of materials because it makes fracture predictable. Based on a fiber bundle model with global load sharing we show that blending strength and stiffness disorder of material elements leads to the stabilization of fracture, i.e. samples which are brittle when one source of disorder is present, become quasi-brittle as a consequence of blending. We derive a condition of quasi-brittle behavior in terms of the joint distribution of the two sources of disorder. Breaking bursts have a power law size distribution of exponent 5/2 without any crossover to a lower exponent when the amount of disorder is gradually decreased. The results have practical relevance for the design of materials to increase the safety of constructions.
description: 9 pages, 6 figures, revtex
Topic segmentation via community detection in complex networks
Creators: name: de Arruda, Henrique F.
name: Costa, Luciano da F.
name: Amancio, Diego R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computation and Language (cs.CL)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Many real systems have been modelled in terms of network concepts, and written texts are a particular example of information networks. In recent years, the use of network methods to analyze language has allowed the discovery of several interesting findings, including the proposition of novel models to explain the emergence of fundamental universal patterns. While syntactical networks, one of the most prevalent networked models of written texts, display both scale-free and small-world properties, such representation fails in capturing other textual features, such as the organization in topics or subjects. In this context, we propose a novel network representation whose main purpose is to capture the semantical relationships of words in a simple way. To do so, we link all words co-occurring in the same semantic context, which is defined in a threefold way. We show that the proposed representations favours the emergence of communities of semantically related words, and this feature may be used to identify relevant topics. The proposed methodology to detect topics was applied to segment selected Wikipedia articles. We have found that, in general, our methods outperform traditional bag-of-words representations, which suggests that a high-level textual representation may be useful to study semantical features of texts.
Minimal Length, Measurability and Gravity
Creators: name: Shalyt-Margolin, A. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The present work is a continuation of the previous papers written by the author on the subject. In terms of the measurability (or measurable quantities) notion introduced in a minimal length theory, first the consideration is given to a quantum theory in the momentum representation. The same terms are used to consider the Markov gravity model that here illustrates the general approach to studies of gravity in terms of measurable quantities. This paper is dedicated to the 75th Anniversary of Professor Vladimir Grigor'evich Baryshevsky.
description: 34 pages, Latex
War Diary of 1st Battalion Canadian Scottish Regiment, Vol. 63 - Appendix 04
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: Canada. Canadian Army
valueUri: http://id.worldcat.org/fast/531187
subject: World War (1939-1945)
valueUri: http://id.worldcat.org/fast/1180924

description: This appendix consists of a summary of the sick and injured on November 17, 1944 including many cases of skin diseases and a note suggesting that this is the fault of administration not taking care of the men and 68 cases of VD (an all time high for the Battalion) with a note encouraging pressure to be put on men to use condoms as VD takes men out of the field unecessarily, operating instructions for the Green sector, and a memorandum on security of information mentioning that any phone line they use is not secure.
Fermi LAT Discovery of Extended Gamma-Ray Emissions in the Vicinity of the HB3 Supernova Remnant
Creators: name: Katagiri, H.
name: Yoshida, K.
name: Ballet, J.
name: Grondin, M. H.
name: Hanabata, Y.
name: Hewitt, J. W.
name: Kubo, H.
name: Lemoine-Goumard, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the discovery of extended gamma-ray emission measured by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope in the region of the supernova remnant (SNR) HB3 (G132.7+1.3) and the W3 HII complex adjacent to the southeast of the remnant. W3 is spatially associated with bright 12CO (J=1-0) emission. The gamma-ray emission is spatially correlated with this gas and the SNR. We discuss the possibility that gamma rays originate in interactions between particles accelerated in the SNR and interstellar gas or radiation fields. The decay of neutral pions produced in nucleon-nucleon interactions between accelerated hadrons and interstellar gas provides a reasonable explanation for the gamma-ray emission. The emission from W3 is consistent with irradiation of the CO clouds by the cosmic rays accelerated in HB3.
description: Corresponding authors: H. Katagiri and K. Yoshida. arXiv admin note: substantial text overlap with arXiv:1108.1833
title: Effect of Printing Parameters on Print Quality and Fracture Propagation Behavior of 3D Printed Concrete
Creators: name: Nakase, Kota
name: Hashimoto, Katsufumi
name: Sugiyama, Takafumi
name: Mori, Hiroaki
name: Kishira, Ryo
name: Oomori, Hiroto
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing
subject: elastic wave tomography
subject: acoustic emission
subject: print quality
subject: fracture propagation behavior
subject: 62

description: 3D concrete printing, an additive manufacturing technology using cementitious materials for large-scale structures, has received a lot of attention recently. 3DCP offers many advantages, including material savings, labor efficiency, and increased flexibility in structural modeling. However, despite the extrusion of carefully designed materials to build the structure, the layered filament system unavoidably creates layer interfaces and inter-filament voids. When manufacturing 3D printed concrete, the method of fabrication, printing parameters, e.g. nozzle geometry and extrusion speed, need to be taken into account. The influence of the printing parameters that determine the arrangement of the layer interfaces in printed concrete, i.e., the print paths, on the fracture propagation behavior of printed specimens has hardly been investigated. Moreover, few studies have adequately assessed the internal structure and print quality of printed concrete using non-destructive testing methods. Mechanical fracture at the layer interface, which is a minute region in printed specimens, was evaluated using acoustic emission techniques in this study. Also, the applicability of elastic wave tomography was investigated for evaluating internal quality. The results show that AE activity during bending failure reveals the influence of the layer interface arrangement of the printed specimen on its fracture propagation behavior. Additionally, elastic wave tomography visualizes the internal structure of printed specimens with different inter-filament void structures, achieved by varying the extrusion volume.
description: Digital Concrete 2024 - Supplementary Proceedings
A knowledge representation meta-model for rule-based modelling of signalling networks
Creators: name: Basso-Blandin, Adrien
name: Fontana, Walter
name: Harmer, Russ
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: The study of cellular signalling pathways and their deregulation in disease states, such as cancer, is a large and extremely complex task. Indeed, these systems involve many parts and processes but are studied piecewise and their literatures and data are consequently fragmented, distributed and sometimes--at least apparently--inconsistent. This makes it extremely difficult to build significant explanatory models with the result that effects in these systems that are brought about by many interacting factors are poorly understood. The rule-based approach to modelling has shown some promise for the representation of the highly combinatorial systems typically found in signalling where many of the proteins are composed of multiple binding domains, capable of simultaneous interactions, and/or peptide motifs controlled by post-translational modifications. However, the rule-based approach requires highly detailed information about the precise conditions for each and every interaction which is rarely available from any one single source. Rather, these conditions must be painstakingly inferred and curated, by hand, from information contained in many papers--each of which contains only part of the story. In this paper, we introduce a graph-based meta-model, attuned to the representation of cellular signalling networks, which aims to ease this massive cognitive burden on the rule-based curation process. This meta-model is a generalization of that used by Kappa and BNGL which allows for the flexible representation of knowledge at various levels of granularity. In particular, it allows us to deal with information which has either too little, or too much, detail with respect to the strict rule-based meta-model. Our approach provides a basis for the gradual aggregation of fragmented biological knowledge extracted from the literature into an instance of the meta-model from which we can define an automated translation into executable Kappa programs.
description: In Proceedings DCM 2015, arXiv:1603.00536
Verfolgung der bronzezeitlichen Zinnquellen Europas durch Zinnisotopie - eine neue Methode zur Beantwortung einer alten Frage
Creators: name: Haustein, Mike
name: Pernicka, Ernst
Publisher: name: Jahresschrift für mitteldeutsche Vorgeschichte
Year: 2022

description: Jahresschrift für mitteldeutsche Vorgeschichte, Bd. 92 (2008): Jahresschrift für Mitteldeutsche Vorgeschichte
Integrability of a deterministic cellular automaton driven by stochastic boundaries
Creators: name: Prosen, Tomaz
name: Mejia-Monasterio, Carlos
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We propose an interacting many-body space-time-discrete Markov chain model, which is composed of an integrable deterministic and reversible cellular automaton (the rule 54 of [Bobenko et al, CMP 158, 127 (1993)]) on a finite one-dimensional lattice Z_2^n, and local stochastic Markov chains at the two lattice boundaries which provide chemical baths for absorbing or emitting the solitons. Ergodicity and mixing of this many-body Markov chain is proven for generic values of bath parameters, implying existence of a unique non-equilibrium steady state. The latter is constructed exactly and explicitly in terms of a particularly simple form of matrix product ansatz which is termed a patch ansatz. This gives rise to an explicit computation of observables and $k$-point correlations in the steady state as well as the construction of a nontrivial set of local conservation laws. Feasibility of an exact solution for the full spectrum and eigenvectors (decay modes) of the Markov matrix is suggested as well. We conjecture that our ideas can pave the road towards a theory of integrability of boundary driven classical deterministic lattice systems.
description: 21 pages with 6 pdf-figures
title: Influence of Coarse Aggregates on the Performance of 3D Printing Concrete
Creators: name: Shen, Wenbin
name: Wang, Hailong
name: Sun, Xiaoyan
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D printing concrete
subject: coarse aggregates
subject: mechanical performance
subject: workability
subject: 62

description: Compared with traditional construction technology in terms of the building structure, 3D printing concrete (3DPC) technology offers significant advantages such as high efficiency, reduced labor costs, and minimized construction waste. As a result, concrete 3D printing has emerged as a prominent trend in the civil engineering industry. However, the current use of 3DPC in engineering applications predominantly relies on mortar, which suffers from significant shrinkage and a propensity for cracking. To overcome the shortcomings of low strength and notable shrinkage of 3DPC, this study incorporated coarse aggregates into 3DPC and clarify the influence of different size aggregates on the performance of 3DPC. Experimental research on 3D printed concrete with coarse aggregates was conducted, and the influence of different particle sizes of coarse aggregates on the workability such as flowability, extrudability, printability, and constructability were figured out. Based on the findings, optimal mix proportions were determined. Mechanical tests were conducted to characterize the effects of printing paths and loading directions on the performance of 3DPC with coarse aggregate. The influence of aggregate particle size on the strength, elastic modulus, and stress-strain behavior of 3D printed concrete was also elucidated. Additionally, microscopic tests were employed to analyze the internal pore characteristics, revealing the influence of factors such as porosity, pore size, and spatial morphology on the mechanical properties and providing insights into the anisotropic mechanism of 3DPC.
description: Digital Concrete 2024 - Supplementary Proceedings
Additional file 1 of Deep learning-based tumor microenvironment segmentation is predictive of tumor mutations and patient survival in non-small-cell lung cancer
Creators: name: Rączkowski, Łukasz
name: Paśnik, Iwona
name: Kukiełka, Michał
name: Nicoś, Marcin
name: Budzinska, Magdalena A.
name: Kucharczyk, Tomasz
name: Szumiło, Justyna
name: Krawczyk, Paweł
name: Crosetto, Nicola
name: Szczurek, Ewa
Publisher: name: figshare
Year: 2022
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 1.
Design of Multi-Model Linear Inferential Sensors with SVM-based Switching Logic
Creators: name: Mojto, Martin
name: L'ubušký, Karol
name: Fikar, Miroslav
name: Paulen, Radoslav
Publisher: name: Zenodo
Year: 2023
Subjects: Machine learning and data analytics in process control
Monitoring and performance assessment
Monitoring of product quality and control performance

description: The data-based design of multi-model linear inferential (soft) sensors (MIS) is studied. These promise increased prediction accuracy yet simplicity of the model structure and training. The state-of-the-art approach to the MIS design consists of three steps: 1) data labeling (establishing training subsets for individual models), 2) data classification (creating a switching logic for the models), and 3) training of individual models. There are two main issues with this concept as steps 2)&3) are separate: (i) discontinuities can occur when switching between the models; (ii) data labeling disregards the quality of the resulting model. Our contribution aims at both the mentioned problems, where, for the problem (i), we introduce a novel support vector method (SVM)-based model training coupled with switching logic identification and, for the problem (ii), we propose a direct optimization of data labeling. The proposed methodology and its benefits are illustrated on an example from the chemical engineering domain.
title: Non-linear behaviour under compression of hardened 3D-printed concrete
Creators: name: Bharti, Mrityunjay
name: Menon, Arun
name: Santhanam, Manu
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D-printed concrete
subject: non-linear behaviour
subject: axial compression
subject: interface layer
subject: stress-strain curve
subject: 62

description: 3D-printed concrete (3DPC) is becoming increasingly popular due to its ability to offer rapid construction, flexibility in design, reduced labour and material costs, and eco-friendliness as it uses waste materials like plastics and resins. It is also ideal for remote location construction and opens numerous possibilities in the construction industry. However, the behaviour of 3D-printed concrete is apparently different from normal concrete due to specific printing parameters and equipment requirements, affecting mechanical strength properties. Therefore, it is essential to study the mechanical behaviour of hardened 3D-printed concrete to ensure its safe use for structural purposes. This research focuses on the non-linear mechanical behaviour of 3D-printed concrete under axial compression, comparing it with conventionally cast concrete of identical material mix design. The study aims to comprehensively explore the behaviour of hardened 3D-printed concrete by subjecting specimens to controlled axial compression tests until failure. The experimental investigation employs a carefully designed set of tests, focusing on the stress-strain relationship, deformation characteristics, and failure modes of 3D-printed concrete under concentric axial compression load. The printed concrete is expected to show directional properties due to the presence of different types of interface layers, such as layers having the benefit of self-weight (vertical layer) and others having no benefit of self-weight (horizontal layers). So, to compare the directionality effects in printed concrete, cored cylindrical specimens are taken in three different directions and compared with the conventionally cast concrete. The study aims to gain an understanding of the stress-strain parameters under compression loads in 3D printed concrete in comparison to conventional concrete and possible implications for structural design and finite element model-ling and analysis of 3DPC structures.
description: Digital Concrete 2024 - Supplementary Proceedings
title: Enhancing interlayer bond strength and flexural performance in 3D concrete printing with SHCC bonding agents
Creators: name: Teng, Fei
name: Ye, Junhong
name: Yu, Jie
name: Li, Heng
name: Mechtcherine, Viktor
name: Weng, Yiwei
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing
subject: strain-hardening cementitious composites
subject: interlayer performance
subject: flexural performance
subject: 62

description: 3D concrete printing (3DCP) faces challenges in weak interlayer and steel reinforcement integration. Existing methods to address these two challenges have limitations in automatic operation and/or limited mechanical enhancement. This study investigates the use of strain-hardening cementitious composites (SHCC) as interfacial bonding agents to simultaneously enhance the interlayer bond strength and flexural performance of 3D printed structures. Three SHCC mixtures with different rheological properties were designed by the adjustment of the viscosity modifying agent (VMA) dosage, and they were used as the interlayer bonding agents, followed by evaluating the interlayer bond strength via splitting tensile test. SHCC-concrete beams, featuring various configurations of SHCC layers, were fabricated and tested via four-point bending to evaluate the flexural per-formance. The results indicate a remarkable increase of 79.58% in interlayer bond strength with the incorporation of SHCC as the bonding agents. In the SHCC-concrete beams, the specimen with an optimal SHCC-layer configuration exhibits a ductile flexural hardening behavior. The flexural strength and deflection increase by 25.53% and 182%, respectively, compared to that of beams without SHCC bonding agents. The findings reveal that the newly developed printing scheme has great potential to simultaneously address the weak interlayer and reinforcement integration problems in 3DCP.
description: Digital Concrete 2024 - Supplementary Proceedings
title: Prediction of the flexural strength of 3D printed SHCC beams based on a stochastic size-dependent model
Creators: name: Yu, Jie
name: Weng, Yiwei
name: Teng, Fei
name: Ye, Junhong
name: Yu, Kequan
name: Yu, Jian-tao
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing
subject: strain-hardening cementitious composites
subject: size effect
subject: flexural strength
subject: size-dependent model
subject: 62

description: Integrating reinforcement remains a challenge in 3D concrete printing (3DCP). Self-reinforced concrete materials, such as strain-hardening cementitious composites (SHCC), show great potential to address this challenge due to their enhanced tensile performance. However, the lack of a predictive method to link the material properties of SHCC and the structural strength of printed SHCC members impedes the engineering application of 3D printed SHCC. This work aims to establish a stochastic model for predicting the flexural strength of 3D printed SHCC beams based on the material performance and the beam span. In the modelling process, a printed beam is conceptualized as a multi-layered structure. The constitutive relationship of the tensile layers is derived based on a stochastic model, in which the impact of size effect on the tensile strength and strain capacity of SHCC is taken into account. The flexural strength of the printed SHCC beam can thus be determined by the cross-sectional analysis of force equilibrium. 3D printed SHCC beams with four spans (240 mm, 300 mm, 450 mm, and 1500 mm) were tested by four-point bending to measure the flexural strength for validation. Results show that the predictive accuracy of the proposed model is as high as 87.4%. The developed model can provide a guideline for predicting the flexural strength of 3D printed SHCC beams, and the findings can facilitate the structural design in 3DCP.
description: Digital Concrete 2024 - Supplementary Proceedings
The Effects of Lyman-Limit Systems on the Evolution and Observability of the Epoch of Reionization
Creators: name: Shukla, Hemant
name: Mellema, Garrelt
name: Iliev, Ilian T.
name: Shapiro, Paul R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the first large-scale, full radiative transfer simulations of the reionization of the intergalactic medium in the presence of Lyman-limit systems (LLSs). To illustrate the impact of LLS opacity, possibly missed by previous simulations, we add either a uniform or spatially-varying hydrogen bound-free opacity. This opacity, implemented as the mean free path (mfp) of the ionizing photons, extrapolates the observed, post-reionization redshift dependence into the epoch of reionization. In qualitative agreement with previous studies, we find that at late times the presence of LLSs slows down the ionization fronts, and alters the size distribution of H II regions. We quantitatively characterize the size distribution and morphological evolution of H II regions and examine the effects of the LLSs on the redshifted 21-cm signal from the patchy reionization. The presence of LLSs extends the ionization history by $Δz \sim 0.8$. The LLS absorbers significantly impede the late-time growth of the H II regions. The position dependent LLS distribution slows reionization further and additionally limits the late growth of the ionized regions. However, there is no "freeze out" of the H II regions and the largest regions grow to the size of the simulation volume. The 21-cm power spectra show that at large scales the power drops by a factor of 2 for 50% and 75% ionization stages (at $k = 0.1$ $\text{h} \, \text{Mpc}^{-1} $) reflecting the limiting effect of the LLSs on the growth of ionized patches. The statistical observables such as the RMS of the brightness temperature fluctuations and the peak amplitudes of the 21-cm power spectra at large-scales ($k = 0.05 - 0.1$ $\text{h} \, \text{Mpc}^{-1} $) are diminished by the presence of LLS.
title: Development and holistic suitability assessment of 3D printable mortar
Creators: name: Rasehorn, Inken
name: Ehm, Clemens
name: Frohmüller, Max
name: Schaudienst, Falk
name: Lehr, Leonard
name: Stephan, Dietmar
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing (3DCP)
subject: big element testing
subject: integrated formwork
subject: thermal transmittance
subject: global warming potential (GWP)
subject: 62

description: In recent years, there has been a growing focus on 3D printing technology. This attention stems from recognizing that this technology is crucial in advancing sustainable and labor-efficient construction practices. In this study, robotic arms were used to print three different integrated formworks which were then to be filled with more ecological materials with different properties (fillers). The aim of this study was to investigate the competitiveness of printed integrated formworks compared to ordinary cast concrete in terms of strength, reproducibility, ecological savings, and required physical building properties. The methods used for this assessment included the strength measurement of prisms and wall elements. Furthermore, the bonding between the fillers and mortar, and the thermal properties of both, were measured. Using the thermal conductivity results, the thermal transmittance of the wall-filler-constructs was calculated. Lastly, the global warming potential (GWPs) of the wall-filler-combinations were calculated. This study shows promising results regarding the achievable strengths, which is in the range of HPCs. However, the reproducibility of bigger elements is still limited. The analysis of the physical properties showed that the printable mortar meets current thermal requirements for approval. At the same time, the material undercut the ecological footprint of comparable cast concretes substantially while also outperforming the average printed mortar. While a higher reproducibility remains desirable, overall the competitiveness with casted concrete could be achieved.
description: Digital Concrete 2024 - Supplementary Proceedings
War Diary of 1st Battalion Canadian Scottish Regiment, Vol. 63 - Appendix 07
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: Canada. Canadian Army
valueUri: http://id.worldcat.org/fast/531187
subject: World War (1939-1945)
valueUri: http://id.worldcat.org/fast/1180924

description: This appendix consists of a note from November 5, 1944 warning about enemy agents using Allied uniforms and documents or posing as refugees to infiltrate their lines, and Infantry Notes of the 21 Army Group on November 21, 1944.