cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Foundation for Functional Graph Programs: The Graph Transformation Control Algebra (GTA)
Creators: name: Weber, Jens H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Applications of graph transformation (GT) systems often require control structures that can be used to direct GT processes. Most existing GT tools follow a stateful computational model, where a single graph is repeatedly modified "in-place" when GT rules are applied. The implementation of control structures in such tools is not trivial. Common challenges include dealing with the non-determinism inherent to rule application and transactional constraints when executing compositions of GTs, in particular atomicity and isolation. The complexity of associated transaction mechanisms and rule application search algorithms (e.g., backtracking) complicates the definition of a formal foundation for these control structures. Compared to these stateful approaches, functional graph rewriting presents a simpler (stateless) computational model, which simplifies the definition of a formal basis for (functional) GT control structures. In this paper, we propose the "Graph Transformation control Algebra" (GTA) as such a foundation. The GTA has been used as the formal basis for implementing the control structures in the (functional) GT tool "GrapeVine".
description: In Proceedings GCM 2022, arXiv:2212.10975
Sonnenfleckenzeichnung Nr. 28998.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.07.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Supplementary Materials from Brain stimulation reveals distinct motives underlying reciprocal punishment and reward
Creators: name: Micheli, Leticia
name: Negrini, Marcello
name: Schuhmann, Teresa
name: Riedl, Arno
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Neuroscience
subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Reciprocal fairness, in the form of punishment and reward, is at the core of human societal order. Its underlying neural mechanisms are, however, not fully understood. We systemize suggestive evidence regarding the involvement of the right dorsolateral and medial prefrontal cortex (rDLPFC, mPFC) in reciprocal fairness in three cognitive mechanisms (cognitive control, domain-general and self-reference). We test them and provide novel insights in a comprehensive behavioural experiment with non-invasive brain stimulation where participants can punish greedy actions and reward generous actions. Brain stimulation of either brain area decreases reward and punishment when reciprocation is costly but unexpectedly increases reward when it is non-costly. None of the hypothesized mechanisms fully accounts for the observed behaviour and the asymmetric involvement of the investigated brain areas in punishment and reward suggests that different psychological mechanisms are underlying punishing selfishness and rewarding generosity. We propose that, for reciprocal punishment, the rDLPFC and the mPFC process self-relevant information, in terms of both personal cost and personal involvement; for reciprocal reward, these brain regions are involved in controlling selfish and pure reciprocity motives, while simultaneously promoting the enforcement of fairness norms. These insights bear importance for endeavours to build biologically plausible models of human behaviour.
A Graph-Transformational Approach for Proving the Correctness of Reductions between NP-Problems
Creators: name: Kreowski, Hans-Jörg
name: Kuske, Sabine
name: Lye, Aaron
name: Windhorst, Aljoscha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: The complexity class NP of decision problems that can be solved nondeterministically in polynomial time is of great theoretical and practical importance where the notion of polynomial-time reductions between NP-problems is a key concept for the study of NP. As many typical NP-problems are naturally described as graph problems, they and their reductions are obvious candidates to be investigated by graph-transformational means. In this paper, we propose such a graph-transformational approach for proving the correctness of reductions between NP-problems.
description: In Proceedings GCM 2022, arXiv:2212.10975
Sonnenfleckenzeichnung Nr. 28901.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 10.02.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Time-Average Based on Scaling Law in Anomalous Diffusions
Creators: name: Kim, Hyun-Joo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: To solve the obscureness in measurement brought about from the weak ergodicity breaking appeared in anomalous diffusions we have suggested the time-averaged mean squared displacement (MSD) $\bar{δ^2 (τ)}_τ$ with a integral interval depending linearly on the lag time $τ$. For the continuous time random walk describing a subdiffusive behavior, we have found that $\bar{δ^2 (τ)}_τ\sim τ^γ$ like that of the ensemble-averaged MSD, which makes it be possible to measure the proper exponent values through time-average in experiments like a single molecule tracking. Also we have found that it is originated from the scaling nature of the MSD at a aging time in anomalous diffusion and confirmed them through numerical results of the other microscopic non-Markovian model showing subdiffusions and superdiffusions with the origin of memory enhancement.
The degenerative evolution from multicellularity to unicellularity during cancer
Creators: name: Chen, Han
name: Lin, Fangqin
name: He, Xionglei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Theoretical reasoning suggests that human cancer may result from knocking down the genetic constraints evolved for maintenance of the metazoan multicellularity, which, however, requires a critical test. Using xenograft-based experimental evolution we characterized for the first time the full life history from initiation to metastasis of a tumor at the genomic and transcriptomic levels, and observed metastasis-driving positive selection for generally loss-of-function mutations on a set of multicellularity-related genes, which is further supported by large-scale exome data of clinical tumor samples. Subsequent expression analysis revealed mainly expression down-regulation of multicellularity-related genes, which form an evolving expression profile approaching that of embryonic stem cells, the cell type with the most characteristics of unicellular life. The theoretical conjecture predicts that genes born at the emergence of metazoan multicellularity tend to be cancer drivers, which we validated using a rigorous phylostratigraphy analysis on the birth rate of genes annotated by Cancer Gene Census. Also, the number of loss-of-function tumor suppressors often predominates over activated oncogenes in a typical tumor of human patients. These data collectively suggest that, different from typical organismal evolution in which gain of new genes is the mainstream, cancer represents a loss-of-function-driven degenerative evolution back to the unicellular ground state. This cancer evolution model may explain the enormous tumoral genetic heterogeneity in the clinic, underlie how distant-organ metastases originate in primary tumors despite distinct environmental requirements, and hold implications for designing effective cancer therapy.
Topological kagome magnets and superconductors
Creators: name: Yin, Jia-Xin
name: Lian, Biao
name: Hasan, M Zahid
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A kagome lattice naturally features Dirac fermions, flat bands and van Hove singularities in its electronic structure. The Dirac fermions encode topology, flat bands favour correlated phenomena such as magnetism, and van Hove singularities can lead to instabilities towards long-range many-body orders, altogether allowing for the realization and discovery of a series of topological kagome magnets and superconductors with exotic properties. Recent progress in exploring kagome materials has revealed rich emergent phenomena resulting from the quantum interactions between geometry, topology, spin and correlation. Here we review these key developments in this field, starting from the fundamental concepts of a kagome lattice, to the realizations of Chern and Weyl topological magnetism, to various flat-band many-body correlations, and then to the puzzles of unconventional charge-density waves and superconductivity. We highlight the connection between theoretical ideas and experimental observations, and the bond between quantum interactions within kagome magnets and kagome superconductors, as well as their relation to the concepts in topological insulators, topological superconductors, Weyl semimetals and high-temperature superconductors. These developments broadly bridge topological quantum physics and correlated many-body physics in a wide range of bulk materials and substantially advance the frontier of topological quantum matter.
Sonnenfleckenzeichnung Nr. 28896.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 01.02.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Processi bioelettrochimici a membrane dinamiche autoformanti incapsulate per il trattamento sostenibile delle acque reflue
Creators: name: Castrogiovanni, Fabiano
Publisher: name: Universita degli studi di Salerno
Year: 2021
Subjects: subject: ICAR/03 INGEGNERIA SANITARIA-AMBIENTALE
subject: Mbr
subject: Fouling
subject: Depurazione

description: 2019 - 2020
description: Access to water has become one of the main challenges of modern society due to the growing imbalance between the demand and availability of water resources. Studies carried out so far on wastewater treatment have greatly improved the quality of purified water and discharged into water bodies and, at the same time, minimizing the risks to human health and the aquatic environment. More stringent regulations on the quality of wastewater, with the scarcity of water resources, have determined over the years the development of advanced water treatments in order to ensure compliance with the limits to discharge into the receiving water body and, at the same time, make it possible to reuse the water treated. Among the significant innovations, membrane bioreactors (MBR), being characterized by significant advantages over conventional activated sludge processes (CAS) thanks to the combination of biological processes with membrane filtration systems, are finding more and more application for the treatment of wastewater. The biological unit of the MBR reactors allows the biodegradation of contaminants while the filtering membranes, integrated in it, allow the physical separation of the treated water from the biomass. Therefore, in addition to high removal efficiencies, substantially disinfected high quality effluent and reduced sludge production, these reactors have the advantage of significantly reducing space and, therefore, the required overall dimensions. Despite these advantages, the rapid fouling of the membranes, defined with the term fouling, and the high investment costs of the membranes still limit the widespread use of the technology on a large scale. ... [edited by Author]
Cyclotron line signatures of thermal and magnetic mountains from accreting neutron stars
Creators: name: Priymak, Maxim
name: Melatos, Andrew
name: Lasky, Paul
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Cyclotron resonance scattering features (CRSFs) in the X-ray spectrum of an accreting neutron star are modified differently by accretion mounds sustained by magnetic and thermocompositional gradients. It is shown that one can discriminate, in principle, between mounds of different physical origins by studying how the line energy, width, and depth of a CRSF depend on the orientation of the neutron star, accreted mass, surface temperature distribution, and equation of state. CRSF signatures including gravitational light bending are computed for both phase-resolved and phase-averaged spectra on the basis of self-consistent Grad-Shafranov mound equilibria satisfying a global flux-freezing constraint. The prospects of multimessenger X-ray and gravitational-wave observations with future instruments are canvassed briefly.
description: 17 pages, 12 figures, accepted for publication in MNRAS
3D Concrete Printing for Structural Applications
Creators: name: Bos, Freek
name: Ahmed, Zeeshan
name: Romero Rodriguez, Claudia
name: Chaves Figueiredo, Stefan
Publisher: name: SPOOL
Year: 2019

description: Recent years have seen a rapid growth of additive manufacturing methods for concrete construction. Potential advantages include reduced material use and cost, reduced labor, mass customization and CO2 footprint reduction. None of these methods, however, has yet been able to produce additively manufactured concrete with material properties suitable for structural applications, i.e. ductility and (flexural) tensile strength. In order to make additive manufacturing viable as a production method for structural concrete, a quality leap had to be made. In the project ‘3D Concrete Printing for Structural Applications’, 3 concepts have been explored to achieve the required structural performance: applying steel fiber reinforcement to an existing printable concrete mortar, developing a strain-hardening cementitious composite based on PVA fibers, and embedding high strength steel cable as reinforcement in the concrete filament. Whereas the former produced only an increase in flexural tensile strength, but limited post-peak resistance, the latter two provided promising strain hardening behavior, thus opening the road to a wide range of structural applications of 3D printed concrete.
description: SPOOL, Vol. 6 No. 2: Energy Innovation #5
The atomic structure of the $\sqrt{3} \times \sqrt{3}$ phase of silicene on Ag(111)
Creators: name: Cahangirov, Seymur
name: Özçelik, Veli Ongun
name: Xian, Lede
name: Avila, Jose
name: Cho, Suyeon
name: Asensio, María C.
name: Ciraci, Salim
name: Rubio, Angel
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The growth of the $\sqrt{3} \times \sqrt{3}$ reconstructed silicene on Ag substrate has been frequently observed in experiments while its atomic structure and formation mechanism is poorly understood. Here by first-principles calculations we show that $\sqrt{3} \times \sqrt{3}$ reconstructed silicene is constituted by dumbbell units of Si atoms arranged in a honeycomb pattern. Our model shows excellent agreement with the experimentally reported lattice constant and STM image. We propose a new mechanism for explaining the spontaneous and consequential formation of $\sqrt{3} \times \sqrt{3}$ structures from $3 \times 3$ structures on Ag substrate. We show that the $\sqrt{3} \times \sqrt{3}$ reconstruction is mainly determined by the interaction between Si atoms and have weak influence from Ag substrate. The proposed mechanism opens the path to understanding of multilayer silicon.
4TU.Bouw Lighthouse projects + PDEng
Creators: name: Van Der Hoeven, Frank
name: Bakker, Siebe
Publisher: name: SPOOL
Year: 2019

description: Spool has published previously four issues dedicated to projects, developed in a high-risk innovation programme: the so-called the 4TU.BOUW lighthouse projects. Initially, the main topic of this programme was Energy-Innovation, hence the name of this “thread”. This issue of Spool presents the last batch of Lighthouse projects as the programme came to a close.
description: SPOOL, Vol. 6 No. 2: Energy Innovation #5
Sonnenfleckenzeichnung Nr. 29007.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.07.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Towards Mechanised Proofs in Double-Pushout Graph Transformation
Creators: name: Söldner, Robert
name: Plump, Detlef
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.4.1; F.4.2; G.2.2

description: We formalise the basics of the double-pushout approach to graph transformation in the proof assistant Isabelle/HOL and provide associated machine-checked proofs. Specifically, we formalise graphs, graph morphisms and rules, and a definition of direct derivations based on deletion and gluing. We then formalise graph pushouts and prove with Isabelle's help that both deletions and gluings are pushouts. We also prove that pushouts are unique up to isomorphism. The formalisation comprises around 2000 lines of source text. Our motivation is to pave the way for rigorous, machine-checked proofs in the theory of the double-pushout approach, and to lay the foundations for verifying graph transformation systems and rule-based graph programs by interactive theorem proving.
description: In Proceedings GCM 2022, arXiv:2212.10975
Apparatisation in & of Architecture
Creators: name: Lee, Sang
name: Bier, Henriette
Publisher: name: SPOOL
Year: 2019

description: Apparatus and apparatisation, the focus of the Cyber-Physical Architecture (CpA) issue #2 of SPOOL, refer to an assemblage of various components, tools, and instruments that in combination produce an exponential surplus beyond the linear sum of parts. On the one hand, apparatus can be seen as a collective of means used to perform certain tasks in order to solve a range of problems. It can contain a series of tools and instruments and produce new rationalities that often translate into pervasive technology, such as, for instance, electricity and, today, Information and Communication Technology (ICT). On the other hand, apparatuses can be found in organisations and institutions that deal with various aspects of a society. For example, the police apparatus, of which rationalities are – rather than being embodied in physical technics – codified in written statutes. The apparatus in this sense is a collection of performative concepts that the subjective members of the apparatus execute in order to serve policies and plans.
description: SPOOL, Vol. 6 No. 1: Cyber-physical Architecture #2
Structural Adaptation through Stiffness Tuning
Creators: name: Hidding, Arwin
name: Bier, Henriette
name: Wang, Qinyu
name: Teuffel, Patrick
name: Senatore, Gennaro
Publisher: name: SPOOL
Year: 2019

description: Adaptive design strategies have been employed to improve structural performances in terms of load-bearing efficiency and energetic impact as well as to achieve multi-functionality. In this work, we investigate a passive adaptation strategy that employs variable stiffness in robotically printed materials. This paper focuses on the design and robotic fabrication of a chaise longue that can change shape to function as both recliner and chair depending on user requirements. The approach is unique in the way computational design is linked with robotic production. In this context, the design of the chaise longue is not limited to a formal process, but extends to the synthesis of the material distribution layout in order to achieve the intended functional behaviour.
description: SPOOL, Vol. 6 No. 1: Cyber-physical Architecture #2
Sonnenfleckenzeichnung Nr. 29026.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 15.08.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Bose-Einstein Condensates: a model system for particle solvation?
Creators: name: Shadkhoo, Shahriar
name: Bruinsma, Robijn
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We propose that impurities in Bose-Einstein condensates can serve as a minimal laboratory system to explore the effects of quantum and thermal fluctuations on solvation. Specifically, we show that the role of quantum fluctuations in the formation of solvation shells and the breakdown of linear response theory can be explored in detail.
description: 5+4 pages, 6 figures
Time and Space Measures for a Complete Graph Computation Model
Creators: name: Courtehoute, Brian
name: Plump, Detlef
Publisher: name: arXiv
Year: 2022
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: We present a computation model based on a subclass of GP 2 graph programs which can simulate any off-line Turing machine of space complexity O(s(n) log s(n)) in space O(s(n)). The simulation only requires a quadratic time overhead. Our model shares this property with Schönhage's storage modification machines and Kolmogorov-Uspenskii machines. These machines use low-level pointer instructions whereas our GP 2-based model uses pattern-based transformation rules and high-level control constructs.
description: In Proceedings GCM 2022, arXiv:2212.10975
Discrete Robotic Assemblies
Creators: name: García, Manuel Jiménez
name: Retsin, Gilles
name: Soler, Vicente
Publisher: name: SPOOL
Year: 2019

description: The projects featured in this paper aim to demonstrate the potential of Discrete Robotic Assembly in architecture. Although still in its early stages, this research proves that there is an increase in construction efficiency within a discrete design framework. The research shows how a limited set of assembly possibilities eases the automation of the manufacturing process and leads to a reduction of labour, construction time, and cost. This intrinsic link between discrete design methods and automation hints at a potential shift in the construction industry governed by a new paradigm in computational design, where architectural elements are defined from and for automation.
description: SPOOL, Vol. 6 No. 1: Cyber-physical Architecture #2
Identification of Orchid Species Using Content-Based Flower Image Retrieval
Creators: name: Apriyanti, D. H.
name: Arymurthy, A. A.
name: Handoko, L. T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we developed the system for recognizing the orchid species by using the images of flower. We used MSRM (Maximal Similarity based on Region Merging) method for segmenting the flower object from the background and extracting the shape feature such as the distance from the edge to the centroid point of the flower, aspect ratio, roundness, moment invariant, fractal dimension and also extract color feature. We used HSV color feature with ignoring the V value. To retrieve the image, we used Support Vector Machine (SVM) method. Orchid is a unique flower. It has a part of flower called lip (labellum) that distinguishes it from other flowers even from other types of orchids. Thus, in this paper, we proposed to do feature extraction not only on flower region but also on lip (labellum) region. The result shows that our proposed method can increase the accuracy value of content based flower image retrieval for orchid species up to $\pm$ 14%. The most dominant feature is Centroid Contour Distance, Moment Invariant and HSV Color. The system accuracy is 85,33% in validation phase and 79,33% in testing phase.
description: Proceeding of International Conference on Computer, Control, Informatics and its Applications 2013, pp. 53-57
Sonnenfleckenzeichnung Nr. 28966.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 28.05.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
The Architecture Machine Revisited
Creators: name: Van Ameijde, Jeroen
Publisher: name: SPOOL
Year: 2019

description: This article summarises a series of experiments at the Architectural Association between 2011 and 2017, which explore the intellectual notion of ‘the architecture machine’ as introduced by Nicholas Negroponte and the Architecture Machine Group at MIT in 1967. The group explored automated computational processes that could assist the process of generating architectural solutions by incorporating much greater levels of complexity at both large and small scales. A central idea to the mission of the Architecture Machine Group was to enable the future inhabitants to participate in the decision-making process on the spatial configurations. The group aimed to define architecture as a spatial system that could directly correlate with human social activities through the application of new computer technologies. Our research presented here focuses on technologies and workflows that trace and translate human activities into architectural structures in order to continue the research agenda set out by Negroponte and others in the 1970s. The research work discusses new scenarios for the creation of architectural structures, using mobile and low-cost fabrication devices, and generative design algorithms driven by sensory technologies. The research question focuses on how architects may script individual and unique processes for generating structures using rule-sets that organise materiality and spatial relationships in order to achieve a user-driven outcome. Our explorations follow a renewed interest in the paradigm where the architect is a ‘process designer’, aiming to generate emergent outcomes where the inherent complexity of the project is generated towards specific performance criteria related to human activities and inhabitation.
description: SPOOL, Vol. 6 No. 1: Cyber-physical Architecture #2
Review on magnetic and related properties of RTX compounds
Creators: name: Gupta, Sachin
name: Suresh, K. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: RTX (R=rare earths, T= 3d/4d/5d, transition metals such as Sc, Ti, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, and X=p-block elements such as Al, Ga, In, Si, Ge, Sn, As, Sb, Bi) series is a huge family of intermetallics compounds. These compounds crystallize in different crystal structures depending on the constituents. Though these compounds have been known for a long time, they came to limelight recently in view of the large magnetocaloric effect (MCE) and magnetoresistance (MR) shown by many of them. Most of these compounds crystallize in hexagonal and tetragonal crystal structures. Some of them show crystal structure modification with annealing temperature; while a few of them show iso-structural transition in the paramagnetic regime. Their magnetic ordering temperatures vary from very low temperatures to temperatures well above room temperature (~510 K). Depending on the crystal structure, they show a variety of magnetic and electrical properties. These compounds have been characterized by means of a variety of techniques/measurements such as x-ray diffraction, neutron diffraction, magnetic properties, heat capacity, magnetocaloric properties, electrical resistivity, magnetoresistance, thermoelectric power, thermal expansion, Hall effect, optical properties, XPS, Mössbauer spectroscopy, ESR, μSR, NMR, NQR etc. Some amount of work on theoretical calculations on electronic structure, crystal field interaction and exchange interactions has also been reported. The interesting aspect of this series is that they show a variety of physical properties such as Kondo effect, heavy fermion behavior, spin glass state, intermediate valence, superconductivity, multiple magnetic transitions, metamagnetism, large MCE, large positive as well as negative MR, spin orbital compensation, magnetic polaronic behavior, pseudo gap effect etc.
description: J. Alloys and Compounds 2014 (Accepted) There may be minor change in the final version after Proof
Quantum Coherent Control of a Single Molecular-Polariton Rotation
Creators: name: Fan, Li-Bao
name: Shu, Chuan-Cun
name: Dong, Daoyi
name: He, Jun
name: Henriksen, Niels E.
name: Nori, Franco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a combined analytical and numerical study for coherent terahertz control of a single molecular polariton, formed by strongly coupling two rotational states of a molecule with a single-mode cavity. Compared to the bare molecules driven by a single terahertz pulse, the presence of a cavity strongly modifies the post-pulse orientation of the polariton, making it difficult to obtain its maximal degree of orientation. To solve this challenging problem toward achieving complete quantum coherent control, we derive an analytical solution of a pulse-driven quantum Jaynes-Cummings model by expanding the wave function into entangled states and constructing an effective Hamiltonian. We utilize it to design a composite terahertz pulse and obtain the maximum degree of orientation of the polariton by exploiting photon blockade effects. This work offers a new strategy to study rotational dynamics in the strong-coupling regime and provides a method for complete quantum coherent control of a single molecular polariton. It, therefore, has direct applications in polariton chemistry and molecular polaritonics for exploring novel quantum optical phenomena.
description: 16 pages, 5 figures , accepted by Physical Review Letters on 19 December, 2022
Sonnenfleckenzeichnung Nr. 29041.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.09.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Sonnenfleckenzeichnung Nr. 28915.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 11.03.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Can a Building Be an Apparatus?
Creators: name: Leach, Neil
Publisher: name: SPOOL
Year: 2019

description: When Michel Foucault introduces the term, dispositif, commonly translated as ‘apparatus’, he uses the architectural example of the Panopticon to illustrate how power is exercised. A building, according to this line of thinking, seemingly has the capacity to exercise control on its occupants. But is this really the case? This paper examines the thinking of Foucault on the subject, and questions to what extent we can conceive of a building as being in and of itself an apparatus. It goes on to explore Foucault’s subsequent reflections on the subject in his interview with Paul Rabinow, ‘Space, Knowledge and Power’, where he seems to qualify his earlier remarks on the Panopticon. It then opens up the theory of affordances to question whether a building – or any other entities that could be perceived as operating as a tool or mechanism within the social realm – has the agency to control behaviour. Finally, the paper introduces Gilles Deleuze’s subsequent remarks in ‘Postscript on the Societies of Control’ where he contributes to the debate about the political agency of form by arguing that in our present age there has been an erosion in the hegemony of the physical, and current forms of control are more gaseous and invisible in their operations than a mere physical building. The paper concludes that it is too simplistic to regard a building in and of itself as an apparatus. At best it could be perceived as an element within a ‘system of relations’ that might constitute the apparatus.
description: SPOOL, Vol. 6 No. 1: Cyber-physical Architecture #2
Metadynamics Surfing on Topology Barriers in the Schwinger Model
Creators: name: Hoelbling, Christian
name: Eichhorn, Timo
name: Rouenhoff, Philip
name: Varnhorst, Lukas
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Topological freezing is a well known problem in lattice simulations: with shrinking lattice spacing a transition between topological sectors becomes increasingly improbable, leading to a problematic increase of the autocorrelation time regarding several observables. We present our investigation of metadynamics as a solution for topological freezing in the Schwinger model. Specifically, we take a closer look at the collective variable and its scaling behaviour, visualize the effects of topological freezing and how metadynamics helps in that respect and explore alternatives for a more efficient building process. Possible implications for and differences to four-dimensional SU(3) theory are briefly discussed.
description: 10 pages, 7 figures, 1 table
Sonnenfleckenzeichnung Nr. 29078.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.12.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
A modern resistive magnetohydrodynamics solver using C++ and the Boost library
Creators: name: Einkemmer, Lukas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Software (cs.MS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this paper we describe the implementation of our C++ resistive magnetohydrodynamics solver. The framework developed facilitates the separation of the code implementing the specific numerical method and the physical model, on the one hand, from the handling of boundary conditions and the management of the computational domain, on the other hand. In particular, this will allow us to use finite difference stencils which are only defined in the interior of the domain (the boundary conditions are handled automatically). We will discuss this and other design considerations and their impact on performance in some detail. In addition, we provide a documentation of the code developed and demonstrate that a performance comparable to Fortran can be achieved, while still maintaining a maximum of code readability and extensibility.
Mathematicians and Ethical Engagement
Creators: name: Chiodo, Maurice
name: Müller, Dennis
Publisher: name: arXiv
Year: 2022
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 01A80, 00A30

description: Building on Chiodo and Bursill-Hall (2018), we outline that mathematicians can demonstrate what we term the "four levels of ethical engagement."
description: 5 pages
Sonnenfleckenzeichnung Nr. 29087.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 21.12.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f.
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor
Dialogs on Architecture
Creators: name: Bier, Henriette
name: Green, Keith
Publisher: name: SPOOL
Year: 2019

description: Dialogs on Architecture is a series of dialogs between researchers and practitioners who are embracing the intellectual model of high technology and are involved in its advancement and application in architecture. The first dialog focuses on the impact of an intellectual model of high technology on architecture, and takes place between Henriette Bier (HB) and Keith Green (KG).
description: SPOOL, Vol. 6 No. 1: Cyber-physical Architecture #2
Resolving neutrino mass hierarchy from supernova (anti)neutrino-nucleus reactions
Creators: name: Vale, Deni
name: Paar, Nils
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We introduce a hybrid method to determine neutrino mass hierarchy by simultaneous measurements of detector responses induced by antineutrino and neutrino fluxes from accretion and cooling phase of type II supernova. The (anti)neutrino-nucleus cross sections for $^{12}$C, $^{16}$O, $^{56}$Fe and $^{208}$Pb are calculated in the framework of relativistic nuclear energy density functional and weak Hamiltonian, while the cross sections for inelastic scattering on free protons, $p(\barν_{e},e^{+})n$, are obtained using heavy-baryon chiral perturbation theory. The simulations of (anti)neutrino fluxes emitted from a protoneutron star in a core-collapse supernova include collective and Mickheev-Smirnov-Wolfenstein effects inside star. The emission rates of elementary decay modes of daughter nuclei are calculated for normal and inverted neutrino mass hierarchy. It is shown that simultaneous use of (anti)neutrino detectors with different target material and time dependence of the signal allow to determine the neutrino mass hierarchy from the ratios of $ν_e / $ $\barν_e$ induced particle emissions. The hybrid method favors detectors with heavier target nuclei ($^{208}$Pb) for the neutrino sector, while for antineutrinos the use of free protons and light nuclei ($\text{H}_2\text{O}$ or $\text{-CH}_2\text{-}$) represent appropriate choice.
description: 4 pages, 2 figures, 1 table
Origin of structural and magnetic transitions in BaFe$_{2-x}$Ru$_x$As$_2$ materials
Creators: name: Sen, Smritijit
name: Ghosh, Haranath
name: Sinha, A. K.
name: Bharathi, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using the experimentally measured temperature and doping dependent structural parameters on Ru doped BaFe$_2$As$_2$, orbital-dependent reconstruction of the electronic structure across the magnetostructural transition is found, through first principle simulations. Below structural transition there exists two distinct Fe - Fe bond distances which modifies the Fe-d$_{xy}$ orbital largely due to its planar spatial extension leading to Lifshitz transition, while the otherwise degenerate Fe-d$_{xz}$ and d$_{yz}$ orbitals become non-degenerate, giving rise to orbital order. The orbital order follows the temperature dependence of orthorhombocity and is also the cause of two distinct Fe - Fe bond distances. Doping dependent Fermi surfaces show nearly equal expansion of both the electron and hole like Fermi surfaces whereas the hole Fermi surface shrinks with temperature but the electron Fermi surface expands comparatively slowly. The observed structural transition in this compound is electronic in origin, occurs close to the Lifshitz transition whereas the suppression of the concurrent magnetic transition is due to loss of temperature dependent nesting of Fermi surface.
description: 5 pages, 4 figures, submitted for publication
Sonnenfleckenzeichnung Nr. 28944.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 23.04.1994, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1994

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der ehem. Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f und mit einer Spalte für A: von blossem Auge sichtbare Flecken, beobachtet mit Hilfe eines korrekt-reduzierenden optischen Filters (naked eye sunspots).
Beobachtungstätigkeit am erwähnten Ort im Auftrag des Schweizerischen Militärdepartements, Bundesamt für Übermittlungstruppen (BAUEM): Zählungen am Fraunhoferschen Normalrefraktor und Zeichnungen am Zeiss-Coudé-Refraktor