cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effects of Thermal Fluctuations on the Thermodynamics of Modified Hayward Black Hole
Creators: name: Pourhassan, Behnam
name: Faizal, Mir
name: Debnath, Ujjal
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we analyze the effects of thermal fluctuations on the thermodynamics of a modified Hayward black hole. These thermal fluctuations will produce correction terms for various thermodynamic quantities like entropy, pressure, inner energy and specific heats. We also investigate the effect of these correction terms on the first law of thermodynamics. Finally, we study the phase transition for the modified Hayward black hole. It is demonstrated that the modified Hayward black hole is stable even after the thermal fluctuations are taken into account, as long as the event horizon is larger than a certain critical value.
description: 13 pages, 4 Figures. Accepted for publication in EPJC
title: Low clinker ECC materials using biomass ash for 3D printing
Creators: name: Asensio, E.
name: Fenàndez, F.
name: Cabello, Z.
name: Álvarez, O.
name: Guerrero, A.
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: ECC
subject: low clinker
subject: biomass ash
subject: self-healing behavior
subject: 3D printing
subject: 62

description: Concrete buildings in service are frequently subjected to dry shrinkage, temperature stress, humidity variations, static and dynamic loads, and other undesirable external variables, resulting in varying degrees of damage exhibited as cracks or micro-cracks. These issues can be mitigated or overcome in part due to the construction industry is constantly evolving, as seen by the development of cement-based matrices with self-healing properties: Engineered Cementitious Composites, ECCs, are a good example of that. These materials including PVA (polyvinyl alcohol) fibers and a high proportion of fly ash (FA) in their composition, belong to a family of high-performance fiber-reinforced composites that have more ductility than standard concretes. Also, they have the ability to self-healing using autogenous mechanisms. Due to the scarcity of FA (thermal power facilities are closing down in some regions of the world) that are employed in ECC, the substitution of fly ash by biomass ash (BA) has been studied with good results in previous research. The construction sector is evolv-ing not only from the design of material point of view, this industry is in con-stant progress also from the perspective of the development of new technolo-gies. An example is the appearance of 3D printing which has some advantages in comparison to traditional technologies as more modeling freedom, less mate-rial consumption, and environmental pollution, making it eligible for green and smart construction. In the current work, the next step is evaluated: reduction of the cement per-centage in the formulations and the adaptation of these new formulations to 3D printing requirements. ECC formulations were created for these purposes, where cement content is reduced by increasing the BA percentage. Fresh and hardened properties and self-healing capacity of the novel cement-based mate-rials for 3D printing were assessed. Results show good behavior of these new ECC matrices based on BA, which allows their use in 3D printing technologies and agrees with the new environ-mental policies and Circular Economy
description: Digital Concrete 2024 - Supplementary Proceedings
Perennial blue: Narcissus, Sameness, and Abstraction.
Creators: name: BANNAN, BENJAMIN JAMES
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 440501
subject: Feminist and queer theory
classificationCode: 360602
subject: Fine arts

description: This practice-led artistic project draws on the myth of Narcissus, the work of Leo Bersani and Derek Jarman, and the notion of queer abstraction through the expanded medium of print. Materials such as carbon paper, Pre-exposure Prophylaxis (PrEP), and the conventional postcard are handled as spatial practices through processes of lamination, dyeing, and the compression of time-based media (film) into discrete images. Through Bersani's ideas of 'correspondence' and 'sameness,' this project results in a Narcissus that moves from a mythological interpretive framework to a studio-based methodology, conceptualised through repetition, abstraction, and figure/ground relationships.
title: A hybrid binder concept for a swift liquid-to-solid transition in 3D printing of suspensions
Creators: name: Remke, Sebastian
name: Kandy, Sharu
name: Sant, Gaurav
name: Gädt, Torben
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: hybrid binder
subject: active stiffening control
subject: material development
subject: liquid to solid transition
subject: freestyle printing
subject: 62

description: Digital Concrete 2024 - Supplementary Proceedings
Selinexor-Bortezomib-Dexamethasone: A Review in Previously Treated Multiple Myeloma
Creators: name: Syed, Yahiya Y.
Publisher: name: Adis Journals
Year: 2023
Subjects: Medicine

description: Declarations Funding The preparation of this review was not supported by any external funding. Authorship and Conflict of interest Yahiya Y. Syed is a salaried employee of Adis International Ltd/Springer Nature, and declares no relevant conflicts of interest. All authors contributed to the review and are responsible for the article content. Ethics approval, Consent to participate, Consent to publish, Availability of data and material, Code availability not applicable Additional information about this Adis Drug Review can be found here Abstract Selinexor [Nexpovio® (EU); Xpovio® (USA)] is a first-in-class, selective exportin-1 inhibitor. Oral selinexor once weekly in combination with subcutaneous bortezomib once weekly and oral dexamethasone twice weekly (selinexor–bortezomib– dexamethasone) is approved in the EU and USA for the treatment of adult patients with multiple myeloma who have received at least one prior therapy. In the open-label, randomized, phase 3 BOSTON trial, this regimen significantly prolonged progression-free survival (PFS) compared with the standard bortezomib–dexamethasone regimen in patients with previously treated multiple myeloma. Selinexor–bortezomib–dexamethasone had a generally manageable tolerability profile and an acceptable safety profile in BOSTON, with a lower incidence of peripheral neuropathy (a bortezomib-induced toxicity) compared with bortezomib–dexamethasone. The triplet regimen uses less bortezomib and dexamethasone during the first 24 weeks of treatment. The efficacy and safety profiles of selinexor–bortezomib–dexamethasone, combined with its onceweekly administration of selinexor and bortezomib, make it a useful additional triplet therapy option for previously treated multiple myeloma. © Springer Nature Switzerland AG 2022
Litocampa henryi 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 henryi

description: Litocampa henryi Condé, 1991
Litocampa henryi Condé, 1991: 244.
Diagnosis (Condé 1991; Bareth 2006)
Body length 4.0– 4.8 mm; epicuticle without microdenticles; smooth clothing setae; antennae with 28 antennomeres; thin long sensillum of third antennomere in ventral position; cupuliform organ with four simple olfactory chemoreceptors; without frontal process; 1+1 ma, 1+1 la, 1+1 lp macrosetae on pronotum and mesonotum, 1+1 ma, 1+1 lp on metanotum; thick, long notal macrosetae with barbs along distal two-third; slightly thin pine cone marginal setae; one dorsal femoral macroseta; one ventral tibial macroseta; smooth apical tarsal setae; subequal grooved elbow-like claws with smooth and small lateral crests; 1+1 lp macrosetae on IV urotergite, 1+1 la, 1+1 lp on V–VII urotergites, 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 1 and a 2 -setae; female appendages without glandular a 2 - setae; cerci covered in long macrosetae with thin barbs along distal half and a few smooth clothing setae.
Habitat and distribution
Cave-dwelling species found in a cave in the Bourgogne region, France (Condé 1991).
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 100, DOI: 10.5852/ejt.2020.728.1181, http://zenodo.org/record/4316883
The Solar Lense-Thirring effect: perspectives for a future measurement
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The predicted Lense-Thirring perihelion precession of Mercury induced by the Sun's angular momentum through its general relativistic gravitomagnetic field amounts to 2 milliarcseconds per century. It turned out to be compatible with the latest experimental determinations of the supplementary perihelion precession of Mercury with the INPOP15a ephemerides, whose accuracy level has nowadays reached the magnitude of the predicted relativistic effect itself thanks to the analysis of some years of tracking data of the MESSENGER spacecraft, which orbited Mercury from 2011 to 2015. A dedicated analysis of three years of MESSENGER data with the DE ephemerides allowed for a $25\%$ determination of the Sun's angular momentum by means of the Lense-Thirring effect, which turned out to be highly correlated with the signature due to the Solar quadrupole mass moment $J_2^{\odot}$.
description: 3 pages, no figures, no tables, 10 references. Contribution to the proceedings of "The Fourteenth Marcel Grossmann Meeting on General Relativity" based on a talk delivered at the PT5 parallel session
title: Creating vascular self-healing concrete using direct ink writing
Creators: name: Wan, Zhi
name: Xu, Yading
name: Šavija, Branko
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: self-healing concrete
subject: architectured materials
subject: vascular networks
subject: 62

description: One of the most promising approaches to create self-healing concrete is the use of vascular networks – hollow channels within the concrete through which a (liquid) repair or healing agent can be transported to the crack region. Traditionally, these vascular networks have been made using glass or plastic tubes cast into the concrete. Herein, we attempt to intentionally create a network of transport channels in the concrete using direct ink writing. In this study, a 3D-printable fiber reinforced mortar was first developed. Three groups of specimens were fabricated using direct ink writing, where the two top and bottom printing layers were printed with different printing directions. The macrostructure of the hardened specimens was studied using CT scanning. Four-point bending tests were carried out to investigate the initial flexural strength and the strength recovery after healing with injected epoxy resin. Fur-thermore, water permeability test was used to evaluate the healing potential of the samples. Experiments showed that printing direction influences the volume of the hollow channels in the achieved prints, the flexural strength, and the water permeability. Although the healing effectiveness regarding flexural strength is remarkable for all specimens, it was only possible to perform a single healing process as hollow channels were then blocked by the epoxy resin. This initial study shows that direct ink writing has great potential to create vascular self-healing concrete.
description: Digital Concrete 2024 - Supplementary Proceedings
Love Saves the Day (2022)
Creators: name: O'CONNELL, JAMIE THOMAS
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 360602
subject: Fine arts

description: This studio led PhD centres on my work Love Saves the Day (2022), the video component of which documents Mark ‘Bez’ Berry, the iconic dancer from the Happy Mondays, re-performing in 2019 a seminal TV appearance by the band from 1989, though with only Bez present. What is produced is a silent film clip, soundtracked by the sounds of the body dancing without music. Within the exegetical text of this PhD, I ask: how can gaps and moments of discontinuity in the structuring of an artwork work to release its forms from the way we have come to know them? In a related question, I ask: in these moments of release, what else may emerge?
On the Nyström and Column-Sampling Methods for the Approximate Principal Components Analysis of Large Data Sets
Creators: name: Homrighausen, Darren
name: McDonald, Daniel J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: In this paper we analyze approximate methods for undertaking a principal components analysis (PCA) on large data sets. PCA is a classical dimension reduction method that involves the projection of the data onto the subspace spanned by the leading eigenvectors of the covariance matrix. This projection can be used either for exploratory purposes or as an input for further analysis, e.g. regression. If the data have billions of entries or more, the computational and storage requirements for saving and manipulating the design matrix in fast memory is prohibitive. Recently, the Nyström and column-sampling methods have appeared in the numerical linear algebra community for the randomized approximation of the singular value decomposition of large matrices. However, their utility for statistical applications remains unclear. We compare these approximations theoretically by bounding the distance between the induced subspaces and the desired, but computationally infeasible, PCA subspace. Additionally we show empirically, through simulations and a real data example involving a corpus of emails, the trade-off of approximation accuracy and computational complexity.
description: 20 pages
title: Tailored low carbon footprint cementitious material for 3D printing: Strategies for rheology adjustment and mechanical performance estimation
Creators: name: De Bono, Victor
name: Ducoulombier, Nicolas
name: Mesnil, Romain
name: Caron, Jean-François
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 62

description: Digital Concrete 2024 - Supplementary Proceedings
title: Development of 3D Printable Cement-Based Composite Containing Oil Shale Ash
Creators: name: Sapata, Alise
name: Sinka, Maris
name: Sahmenko, Genadijs
name: Bajare, Diana
name: Migliniece, Baiba
name: Hanzic, Lucija
name: Štefančič, Mateja
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: additive manufacturing
subject: waste materials
subject: oil shale ash
subject: cement-based composite
subject: workability
subject: buildability
subject: 62

description: Mortars used in 3D-printing typically contain large amounts of cement and other high-value powders to ensure printability. Consequently, 3D-printed concrete structures have a high carbon footprint. In the Baltic states, power plants utilize oil shale, producing significant amounts of non-biodegradable oil shale ash (OSA). To address these environmental problems, we are aiming to formulate a preblended dry product for extrusion 3D printing which contains oil-shale ash. To assess suitability for the use in cement-based composites, the properties of raw OSA are studied, including particle size distribution, chemical composition, specific surface, reactivity, and shape with SEM. Additionally, the influence on mechanical properties has been studied when substituting reactive powders in a pre-blended mix with oil shale ash in varying quantities. Additionally, workability and buildability of mixtures in fresh state is investigated to determine suitability for 3D printing. The preliminary results have revealed that replacing up to 20% of reactive powders with oil shale ash does not lead to a significant decrease in mechanical strength in the hardened state. Moreover, in the fresh state, substituting up to 20% of reactive powders with OSA enhances workability. Based on findings thus far, OSA is a viable substitute for cement in printable concrete, with the potential to reduce the carbon footprint of printed structures.
description: Digital Concrete 2024 - Supplementary Proceedings
title: Ternary Gypsum-Cement-Pozzolan Composites for 3D Printing with Reduced Environmental Impact
Creators: name: Sahmenko, Genadijs
name: Sinka, Maris
name: Bumanis, Girts
name: Sapata, Alise
name: Puzule, Liga
name: Slosbergs, Peteris
name: Bajare, Diana
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: additive manufacturing
subject: waste materials
subject: gypsum-cement-pozzolan
subject: recycled gypsum
subject: sustainability
subject: ternary composite
subject: 3D concrete printing
subject: 62

description: The objective of this study is to develop a sustainable gypsum-cement-pozzolanic (GCP) ternary binder composite using both commercially available and waste gypsum, such as construction demolition waste gypsum (CDG) and industrial by-product phosphogypsum (PG). The GCP ternary composite combines the quick setting time of gypsum, high final strength of Portland cement (PC), with a crucial pozzolanic component that ensures chemical stability. Within the framework of this research, fresh state properties, mechanical properties, and durability was tested and compared among the developed GCP composites. The obtained results showed that the open printing time and consistency is suitable for 3D printing for all mixtures. The compressive strength results indicated that the developed composites possessed a compressive strength comparable to that of ordinary concrete (>35MPa). The water absorption was less than 20% and the softening coefficient remained above 0.70 for all mixtures. The results showed poor frost durability for composites containing PG, however both mixtures containing CDG showed satisfactory frost resistance. The GCP mixture used for the trial 3D printing to assess its buildability and print quality showed satisfactory results, indicating its suitability for 3D printing.
description: Digital Concrete 2024 - Supplementary Proceedings
High frequency oscillations of first eigenmodes in axisymmetric shells as the thickness tends to zero
Creators: name: Chaussade-Beaudouin, Marie
name: Dauge, Monique
name: Faou, Erwan
name: Yosibash, Zohar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: The lowest eigenmode of thin axisymmetric shells is investigated for two physical models (acoustics and elasticity) as the shell thickness (2$ε$) tends to zero. Using a novel asymptotic expansion we determine the behavior of the eigenvalue $λ$($ε$) and the eigenvector angular frequency k($ε$) for shells with Dirichlet boundary conditions along the lateral boundary, and natural boundary conditions on the other parts. First, the scalar Laplace operator for acoustics is addressed, for which k($ε$) is always zero. In contrast to it, for the Lam{é} system of linear elasticity several different types of shells are defined, characterized by their geometry, for which k($ε$) tends to infinity as $ε$ tends to zero. For two families of shells: cylinders and elliptical barrels we explicitly provide $λ$($ε$) and k($ε$) and demonstrate by numerical examples the different behavior as $ε$ tends to zero.
title: Effect of expanded perlite on the properties of 3DCP mixtures
Creators: name: Barbosa, Marcella
name: Anjos, Marcos
name: Maia, José
name: Camões, Aires
name: Cruz, Paulo
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D printing
subject: energy efficiency
subject: aggregate
subject: expanded perlite
subject: shape retention
subject: 62

description: Reducing energy consumption for continuous heating and cooling of buildings is currently one of the biggest sustainability challenges. This happens due to the use of materials with low insulation indexes and high thermal losses. As an alternative to minimize this problem, the use of porous aggregates in con-crete dosage stands out. Given this, 3D printing of concrete (3DCP) with light-weight aggregates is an approach that should enable automated formwork-free construction with higher quality, productivity and, at the same time, contribute to better energy efficiency of the structures. As this technology demands very specific rheological requirements, more research needs to be carried out. There-fore, this study aims to investigate the use of different levels of expanded perlite (EP) as a substitute for natural sand in the properties of cementitious composites for 3D printing. Based on a reference mix, EP was used to replace natural aggre-gate at levels of 25%, 50%, 75%, and 100% by volume. In the fresh state, tests were carried out for spreading on the consistency table, bulk density, viscosity (using a viscometer), water retentivity, and shape retention. In the hardened state, printed samples were tested at 7 and 28 days to assess compressive strength. In general, the results show that expanded perlite acts by reducing the density of the mixtures, greatly influencing the other tests carried out. Finally, considering the printing system used, it was possible to find optimized dosages that allow the use of these aggregates in 3DCP mixtures by choosing suitable materials combined with a correct dosage study to meet the criteria of this new construction technique.
description: Digital Concrete 2024 - Supplementary Proceedings
title: The Effect of Coarse/Fine Aggregate Ratios on the Properties of Additively Constructed Concrete
Creators: name: Foiles, Dreycen
name: Negron-McFarlane, Christian
name: Kreiger, Eric
name: Kreiger, Megan
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: additive construction
subject: 3D printing
subject: aggregate ratios
subject: fresh properties
subject: digital image correlation
subject: 62

description: Digital Concrete 2024 - Supplementary Proceedings
title: Composite concrete columns of 3DP concrete and self-compacting concrete subjected to normal force
Creators: name: Silfwerbrand, Johan
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3DPC
subject: Bond Strength
subject: Composite Columns
subject: Load Tests
subject: SCC
subject: 62

description: Conventional concrete columns are cast in forms made of steel or wood. The work of erecting and dismantling the formwork is time-consuming and laborious. Steel forms can be used several times but wood forms are usually only used once or a small number of times but in both cases additional materials are necessary for completing the columns. By using 3D Printed Concrete (3DPC) as lost forms, the work can be more efficient. If composite action between the form and the concrete core can be reached, also material savings with connected reductions in CO2 emissions can be achieved by combining a high performance concrete form with a concrete core of moderate strength. The process can be even more efficient by using Self Compacting Concrete (SCC) in the core. One BSc and one MSc thesis project on small specimens of this type has beenconducted with promising result at KTH. That led to the successful application of a larger experimental program containing both load tests and tests on durability. This paper focuses on four composite and two homogeneous SCC beams that were produced and subjected to normal force up to failure. The specimens were 3 m long and had a circular cross section with a diameter = 0,3 m. The composite columns reached failure loads that corresponded well to the ones of the homogeneous columns. After the loading tests, the bond between the form and the core was tested using pull-off tests of cores drilled from the columns in areas without failure zones. The average bond strength value was 1,75 MPa which is in the same range as frequent values in laboratory tests of bond between concrete and concrete and an additional indication of composite actions.
description: Digital Concrete 2024 - Supplementary Proceedings
The effect of universe inhomogeneities on cosmological distance measurements
Creators: name: Nikolaev, Aleksei
name: Chervon, Sergey
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the focusing equation, the equation for the cosmological angular diameter distance is derived, based on the ideas of Academician Ya.B. Zel'dovich, namely, that the distribution of matter at small angles is not homogeneous, and the light cone is close to being empty. We propose some ways of testing a method for measuring the angular diameter distances and show that the proposed method leads to results that agree better with the experimental data than those obtained by the usual methods.
description: 4 pages
title: A digital library for using mine tailings in low-carbon concrete replacements for mine back-filling & 3D printing
Creators: name: Corfe, Ian
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: mine tailings
subject: geopolymer
subject: 3D printing
subject: digital recipe library
subject: alkali activation
subject: 62

description: Research to investigate the inclusion of mine tailings into low carbon concrete replacement materials for both mine back-filling and 3D printing has the potential to reduce the proportions of unutilized waste produced by mining-intensive countries. To aid this, procedures to revoke the waste status of the raw and final materials, and to produce a mix composition ‘digital recipe’ library are required in addition to the standard material characterization and testing. Such a system can be continuously augmented and used to search for recipes supporting carbon neutrality and the circular economy for mine filling solutions and other applications, including 3D printing with low-carbon concrete replacement mate-rials. Results show the mineral composition of two principal tailing sources con-taining aluminosilicates and so having the potential to be active materials in ge-opolymer or alkali-activated materials. Additionally, the compressive strength of some tailing-containing mix compositions surpass some without, some but not all mixes are rheologically suitable for mine back-fill pumping and/or 3D print-ing, and tailings-induced porosity increases with increased tailing incorporation.
description: Digital Concrete 2024 - Supplementary Proceedings
An overview of the Daya Bay Reactor Neutrino Experiment
Creators: name: Cao, Jun
name: Luk, Kam-Biu
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Daya Bay Reactor Neutrino Experiment discovered an unexpectedly large neutrino oscillation related to the mixing angle $θ_{13}$ in 2012. This finding paved the way to the next generation of neutrino oscillation experiments. In this article, we review the history, featured design, and scientific results of Daya Bay. Prospects of the experiment are also described.
description: 18 pages, 5 figures. An overview to appear in the Special Issue on neutrino oscillations of Nuclear Physics B
title: Environmental benefits of concrete floor slabs produced with digitally fabricated formworks – a case study
Creators: name: Ammann, Rebecca
name: Gebhard, Lukas
name: Thoma, Karel
name: Mata-Falcón, Jaime
name: Kaufmann, Walter
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: digital framework
subject: structural integrity
subject: environmental impact
subject: structural efficiency
subject: case study
subject: 62

description: Digital Concrete 2024 - Supplementary Proceedings
Spin Mapping of Surface and Bulk Rashba States in Ferroelectric a-GeTe(111) Films
Creators: name: Elmers, H. J.
name: Wallauer, R.
name: Liebmann, M.
name: Kellner, J.
name: Morgenstern, M.
name: Wang, R. N.
name: Boschker, J. E.
name: Calarco, R.
name: Rader, O.
name: Kutnyakhov, D.
name: Chernov, S. V.
name: Medjanik, K.
name: Tusche, C.
name: Ellguth, M.
name: Volfova, H.
name: Braun, J.
name: Minar, J.
name: Ebert, H.
name: Schonhense, G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A comprehensive mapping of the spin polarization of the electronic bands in ferroelectric a-GeTe(111) films has been performed using a time-of-flight momentum microscope equipped with an imaging spin filter that enables a simultaneous measurement of more than 10.000 data points (voxels). A Rashba type splitting of both surface and bulk bands with opposite spin helicity of the inner and outer Rashba bands is found revealing a complex spin texture at the Fermi energy. The switchable inner electric field of GeTe implies new functionalities for spintronic devices.
title: 3D printable mortars with different recycled concrete powders as fillers
Creators: name: Canavarro Cavalcante, Tiago
name: Castrillon Fernandez, Letitia
name: Toledo Filho, Romildo
name: Mendoza Reales, Oscar
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: 3D concrete printing
subject: recycled concrete powder
subject: rheology
subject: yield stress
subject: green strength
subject: 62

description: 3D Printing in construction hold great opportunities to tackle long-lasting challenges such as high waste generation and lack of automatization. However limited solutions to lower the high cement content of printable mix-tures have been proposed. An interesting prospect is the use of recycled concrete powders (RCP) as cement replacement. RCPs are commonly discarded from the production of recycled aggregates from concrete wastes, but these fine particles can be employed as fillers in cementitious mixtures. Yet, properties of recycled materials are dependent on their origin, and recycled powders will consequently differ in their compositions and effect on concrete. Understanding the character of each RCP is decisive to determine an adequate mix design for 3D Printing with lower cement content, while meeting technical requirements. This research investigated the use of RCPs from two origins to replace 50% of Portland Ce-ment in printable mortars. Their effect in rheological behavior was evaluated by an adapted green strength test. Mechanical performance was evaluated through uniaxial compressive testing at 7 and 28 days. The Life Cycle Assessment meth-odology was used for environmental analysis of the mortars. The results show that rheological behavior varied considerably due to the different physical prop-erties of each powder, with RCPs causing increase or decrease in yield stress. A loss on mechanical performance of mortars occurred with both powders. Finer adjustment of mix design could however solve these issues, and thus ensure the use of RPCs as candidates in the formulation of low cement 3D printable mix-tures. Finally, the results of Life Cycle Assessment support the use of RCPs as an environmentally viable option for printable mortars.
description: Digital Concrete 2024 - Supplementary Proceedings
Driving Skyrmions on a Composite Multiferroic Lattice
Creators: name: Wang, Zidong
name: Grimson, Malcolm J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetic skyrmions and multiferroics are the most interesting objects in nanostructure science that have great potential in future spin-electronic technology. The study of the multiferroic skyrmions has attracted much interest in recent years. This paper reports on the magnetic skyrmions induced by an electric driving field on a composite multiferroic lattice. By using the spin dynamics method, we use a classical magnetic spin model and an electric pseudospin model, which are coupled by a strong magnetoelectric coupling in the dynamical simulations. Interestingly, we observe some skyrmion-like objects on the electric component during the switching process, which is due to the connection between the electric and the magnetic structures.
description: 8 pages; 6 figures; MMM-Intermag Conference 2016, San Diego, U.S.A; EMN Croatia Meetings 2016, Dubrovnik, Croatia
Die historische Bedingtheit des Apostolischen Glaubensbekenntnisses
Creators: name: Heron, Alasdair I. C.
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 14 Nr. 10 (1978): Concilium: Internationale Zeitschrift für Theologie, Band 14, Heft 10
title: One-part and two-part alkali-activation of iron mining tailings for sustainable 3D concrete printing mixes
Creators: name: Rodrigues e Silva, Rafaela
name: Araujo de Souza, Eduarda
name: Ribeiro Borges, Paulo
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: alkali-activated materials
subject: mining wastes
subject: overburden materials
subject: additive manufacturing
subject: 3D concrete printing
subject: 62

description: 3D Concrete printing (3DCP) is a key technology for the future of civil engineering. Its main advantages are the reduction of labor costs and ac-celerated construction process. However, the mixes still need improvements concerning sustainability. Sustainable and affordable mixes for 3DCP may be based on mining residues, either fine overburden materials (OM) as binders or fine quartz tailings as aggregates. The OM can be alkali-activated by the one-part (“just add water”) or two-part alkaline activation methods. The first con-sists of using a solid activator mixed with the powdered binder; water and ag-gregates are then added, just like Portland cement mortar and concrete produc-tion. The two-part method contains the alkaline activator in a separate aqueous solution that is mixed to the binder and aggregates to produce the alkali-activated material (AAM). The one-part method is simple and safer, but some-times leads to inhomogeneous mixes as the dispersion of powdered activator is difficult. This paper presents preliminary results of OM as main binder for AAM. A fine quartz tailing is used as single fine aggregate. The mixes were prepared to be potentially used as mortars for 3DCP. Therefore, they were compared with a commercial PC-based 3DCP mortar. The properties assessed were consistency, extrudability and compressive strength development. SEM was used to show the differences in the microstructure of one-part and two-part OM-based AAM, compared with the commercial mortar. The results show promising low-carbon mixes to be employed for 3DCP.
description: Digital Concrete 2024 - Supplementary Proceedings
title: Circular Design Strategies for 3D Concrete Printing in the Built Environment
Creators: name: Gümrük, I.
name: Wolfs, R.
name: Schröder, T.
name: Salet, T.
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: digital fabrication
subject: digital concrete
subject: sustainability
subject: c-indicator
subject: 62

description: The construction industry aims to address its large environmental footprint and waste generation. To reduce the environmental impact of the built environment, there is a tran-sition towards a circular economic model on the national and European level. Digital fabrication is presented as a viable direction towards lowering the environmental impact through optimized forms and reduced construction waste. Concrete being the most used material in construction, 3D Concrete Printing (3DCP) also became one of the more popular digital fabrication methods. With circularity in mind, there have been various studies on the life cycle assessment (LCA) of 3DCP materials and processes [1], [2]. While these studies are invaluable, in this context, the qualities of designs are often out of the scope of LCA. In this study, we evaluate 3DCP projects in practice and academia, to map existing design practices and determine their degree of circularity. For assessment, we will use a circularity indicator (C-Indicator) which has been developed for the context of 3DCP, by adapting existing C-indicators that are designed to assess the circularity of tradition-ally constructed buildings. Through this assessment, we underline and encourage the circular practices in 3DCP, as the technology develops. In this extended abstract, we’ll briefly discuss the findings of the study through one of the projects; Project Milestone, the first of a series of 3D printed concrete houses in the Netherlands[3].
description: Digital Concrete 2024 - Supplementary Proceedings
title: 3D Concrete printing and circularity: designing, testing, and modelling dry joints for structural applications.
Creators: name: Wolfs, Rob
name: Gümrük, Idil
name: Driessen, Saar
name: Ferguson, Matthew
name: Yu, Rong
name: Suiker, Akke
name: Salet, Theo
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: digital fabrication
subject: re-use
subject: numerical modelling
subject: structural testing
subject: 62

description: The technology of 3D concrete printing (3DCP) is advertised to reduce the total amount of concrete used in construction, through selective placement of material following principles of structural design and optimization. This has led to a rapid increase of 3D printed applications in practice, such as bridges and low-rise buildings [1]. The vast majority of these projects, however, consist of structures produced in a monolithic manner: a large 3D printer produces the entire object in one go. This de-sign strategy renders disassembly and reuse near impossible, and thus, does not com-ply with principles of a circular economy in construction. When objects are produced in parts, e.g., in a ‘prefab’ printing environment, the absence of dry joining principles for 3DCP results in glued or cast-in-place connections when assembling the final structure [2]. This, again, limits reusability. To support the transition of the construc-tion industry towards circularity, this contribution presents the design considerations, experimental testing, and numerical modelling of dry joints for 3DCP.
description: Digital Concrete 2024 - Supplementary Proceedings
title: Anisotropic Characteristics of 3D-Printed Geopolymer Mortars from End-of-Life Materials of Construction Industry
Creators: name: Kul, Anıl
name: Kocaer, Öznur
name: Lucas, Sandra
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: geopolymer
subject: end-of-life materials
subject: 3D printing
subject: mechanical properties
subject: bond strength
subject: 62

description: The demand for housing has grown exponentially, leading to an increased emphasis on rapid construction methods that align with circular economy principles. 3D concrete printing is emerging as a key solution to address the comon issues of affordable housing, accelerated construction processes, and the modernization of the construction sector. In order to embrace circular economy principles, which prioritize waste reduction and efficient resource utilization, it's crucial for 3D printable materials to support material recycling at the end of their useful life. This study focuses on investigating the mechanical properties of 3D printable geopolymer mortars derived from end-of-life materials (specifically brick masonry waste) in the construction sector. To assess the viability of 3D printable one-part geopolymer, the investigation involved analyzing the flowability and buildability properties of the mixtures, and, orientation-based mechanical investigation, including compressive, flexural, and splitting tensile strength assessments on 3D printed samples with different layer heights. The interlayer bond properties were examined using direct tensile strength and microcomputed tomography. In summary, the study findings revealed the existence of anisotropy, a key indicator for ultimate performance. Specimens loaded perpendicular to the printing path demonstrated similar performance to those cast in molds, underscoring the importance of the intersection ratio between the interlayer bond region and the load transfer plane. Nevertheless, anisotropy can be mitigated to some extent by adjusting the layer height, resulting in reduced pore content and distribution, reducing problems associated with weak interlayer bond zones in stress transfer. The results obtained from this study are expected to constitute a significant contribution to the advancement and promotion of sustainable waste-based alterna-tives for 3D printing of concrete, an area that remains open to further development.
description: Digital Concrete 2024 - Supplementary Proceedings
title: A Framework for Crafting Sustainable Lightweight Concrete in Additive Manufacturing
Creators: name: Rangel, Carolina
name: Salet, Theo
name: Lucas, Sandra
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2024
Subjects: subject: LWA concrete
subject: sustainability
subject: LCA
subject: bio-based aggregate
subject: lightweight
subject: 62

description: Combining 3D (concrete) printing technology with energy-efficient materials in structure design is a promising approach to meeting sustainability targets by 2030. For instance, fabricating slender and lighter 3D elements induces lower self-loads on the structure and improves the thermal response of 3D-printed buildings. However, formulating sustainable alternatives to cementitious printable materials must be accompanied by environmental and economic Life Cycle Assessments (LCA). This study underscores a collaborative design approach between material science and LCA tools in developing lightweight concrete tailored for additive manufacturing techniques.
description: Digital Concrete 2024 - Supplementary Proceedings
Solar and Stellar Photospheric Abundances
Creators: name: Prieto, Carlos Allende
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations. Improving those foundations to refine the accuracy of the inferred abundances has proven challenging, but progress has been made. In parallel, developments on instrumentation, chiefly regarding multi-object spectroscopy, have been spectacular, and a number of projects are collecting large numbers of observations for stars across the Milky Way and nearby galaxies, promising important advances in our understanding of galaxy formation and evolution. After providing a brief description of the basic physics and input data involved in the analysis of stellar spectra, a review is made of the analysis steps, and the available tools to cope with large observational efforts. The paper closes with a quick overview of relevant ongoing and planned spectroscopic surveys, and highlights of recent research on photospheric abundances.
description: Invited review to appear in Living Reviews in Solar Physics. 39 pages, 7 figures
DNA library preparation for Ion Torrent S5 sequencing
Creators: name: Papathanassiou, Maria
name: Vlachostergios, Panagiotis J.
name: Anagnostou, Maria
name: Thodou, Eleni
name: Tamposis, Ioannis
name: Mitrakas, Lampros
name: Zachos, Ioannis
name: Ioannou, Maria
name: Koukoulis, George K.
name: Samara, Maria
name: Tzortzis, Vassilios
Publisher: name: figshare
Year: 2023
Subjects: Cancer genetics
Cancer diagnosis
Molecular targets
Predictive and prognostic markers
Solid tumours
Oncology and carcinogenesis not elsewhere classified

description: The current protocol desrcibes the steps followed for DNA library preparation for NGS use from fresh-frozen kidney tissue samples, including cancerous and normal tissues. Library amplification, purification and quantification is included.
Believing in the Powers of Mindfulness: A Thematic Narrative Approach and the Development of a New Scale
Creators: name: Rahmani, Masoumeh
name: van Mulukom, Valerie
name: Farias, Miguel
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2023
Subjects: classificationCode: 520504
subject: Psychology of religion
classificationCode: 5203
subject: Clinical and health psychology
classificationCode: 5004
subject: Religious studies
classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 5201
subject: Applied and developmental psychology
classificationCode: 440107
subject: Social and cultural anthropology
classificationCode: 5205
subject: Social and personality psychology

description: Objectives: The beliefs and expectations people bring into mindfulness practice can affect the measurement outcomes of interventions. The aim of this mixed-method study was to examine the key beliefs in the powers of mindfulness—understood as non-judgmental awareness of the present moment—to transform the individual and the society, and to develop and validate the Belief in the Powers of Mindfulness Scale (BPMS). Method: In-depth, semi-structured interviews were conducted with mindfulness meditators (n = 32), including follow-up interviews (n = 22). Qualitative data were analysed through a thematic narrative approach. Participants (n = 458) completed a questionnaire that included the new scale. Results: Participants’ key beliefs were thematically analysed in three transformation themes: interpersonal relationships and compassion, peace and violence, and the inner world—themes were encapsulated in the BPMS. Ideas presented in each theme were undergirded by a host of ideologies, epistemic claims, and metaphysical assumptions about the nature of mind, self, and reality—which are predicated by broader cultural trends such as expressive individualism, perennial philosophy, and New Age sentiments and ideals. The BPMS showed strong internal consistency and convergent validity, and individuals who were older and more spiritual practised mindfulness more often and for longer, and self-reported greater mindfulness skills, and scored higher on the BPMS. Conclusions: Findings illustrate the persisting importance of attending to people’s beliefs and expectations in mindfulness interventions and further the call for a contextual approach that accounts for cultural factors. The newly developed BPMS may assist with the measuring of peoples’ beliefs and expectations.
Imaginary noise and parity conservation in the reaction A+A 0
Creators: name: Deloubrière, O.
name: Frachebourg, L.
name: Hilhorst, H. J.
name: Kitahara, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The master equation for the reversible reaction A+A 0 is considered in Poisson representation, where it is equivalent to a Langevin equation with imaginary noise for a complex stochastic variable ϕ. Such Langevin equations appear quite generally in field-theoretic treatments of reaction-diffusion problems. For this example we study the probability flow in the complex ϕplane both analytically and by simulation. We show that this flow has various curious features that must be expected to occur similarly in other Langevin equations associated with reaction-diffusion problems.
description: 12 pages, 5 figures