cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploring Quantum Control Landscape Structure
Creators: name: Nanduri, Arun
name: Donovan, Ashley
name: Ho, Tak-San
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A common goal of quantum control is to maximize a physical observable through the application of a tailored field. The observable value as a function of the field constitutes a quantum control landscape. Previous works have shown, under specified conditions, that the quantum control landscape should be free of suboptimal critical points. This favorable landscape topology is one factor contributing to the efficiency of climbing the landscape. An additional, complementary factor is the landscape \textit{structure}, which constitutes all non-topological features. If the landscape's structure is too complex, then climbs may be forced to take inefficient convoluted routes to finding optimal controls. This paper provides a foundation for understanding control landscape structure by examining the linearity of gradient-based optimization trajectories through the space of control fields. For this assessment, a metric $R\geq 1$ is defined as the ratio of the path length of the optimization trajectory to the Euclidean distance between the initial control field and the resultant optimal control field that takes an observable from the bottom to the top of the landscape. Computational analyses for simple model quantum systems are performed to ascertain the relative abundance of nearly straight control trajectories encountered when optimizing a state-to-state transition probability. The collected results indicate that quantum control landscapes have very simple structural features. The favorable topology and the complementary simple structure of the control landscape provide a basis for understanding the generally observed ease of optimizing a state-to-state transition probability.
description: 27 pages, 7 figures
The Permanence of a Tattoo: Narratives of an Undocumented Student
Creators: name: Kozlowska, Wiktoria
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Multicultural education (excl. Aboriginal and Torres Strait Islander, Māori and Pacific Peoples)

description: Narratives of undocumented students reveal that, commonly, a shared concern of such youth is a sense of powerlessness in the school environment; this lack of control predominantly stems from legal restrictions and anti-immigrant sentiment among peers and staff (Chang, 2017). However, there is a danger in treating undocumented youth as a monolith, as well as in failing to recognize their agency (Abrego & Negrón-Gonzales, 2020). Autoethnography, as a methodology, is by its very nature an act of agency which allows vulnerable populations to deeply explore their own sensitive identities (Philaretou & Allen, 2006). This thesis thus highlights my own voice as an undocumented student by combining the temporality, sociality and place of narrative inquiry (Clandinin & Connelly, 2000) with critical autoethnography’s attention to social inequities (Adams, 2017). Critical reflections on my educational experiences, as they compare and contrast with narratives in existing literature, imagine possible futures in which pre- and in-service teachers may more equitably support undocumented students in the classroom. Additionally, research on undocumented students predominantly focuses on immigrants of Latinx origin, who constitute almost eighty percent of the undocumented population (Migration Policy Institute, 2019); under a queer theoretical framework, my identity as a White immigrant of European origin uniquely problematizes naturalized attitudes towards the racialization of undocumented status.
Dynamic Games among Teams with Delayed Intra-Team Information Sharing
Creators: name: Tang, Dengwang
name: Tavafoghi, Hamidreza
name: Subramanian, Vijay
name: Nayyar, Ashutosh
name: Teneketzis, Demosthenis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Multiagent Systems (cs.MA)
subject: Computer Science and Game Theory (cs.GT)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We analyze a class of stochastic dynamic games among teams with asymmetric information, where members of a team share their observations internally with a delay of $d$. Each team is associated with a controlled Markov Chain, whose dynamics are coupled through the players' actions. These games exhibit challenges in both theory and practice due to the presence of signaling and the increasing domain of information over time. We develop a general approach to characterize a subset of Nash Equilibria where the agents can use a compressed version of their information, instead of the full information, to choose their actions. We identify two subclasses of strategies: Sufficient Private Information Based (SPIB) strategies, which only compress private information, and Compressed Information Based (CIB) strategies, which compress both common and private information. We show that while SPIB-strategy-based equilibria always exist, the same is not true for CIB-strategy-based equilibria. We develop a backward inductive sequential procedure, whose solution (if it exists) provides a CIB strategy-based equilibrium. We identify some instances where we can guarantee the existence of a solution to the above procedure. Our results highlight the tension among compression of information, existence of (compression based) equilibria, and backward inductive sequential computation of such equilibria in stochastic dynamic games with asymmetric information.
description: 30 pages
Stepwise transformation of algorithms into array processor architectures by the decomp
Creators: name: Vehlies, U.
Publisher: name: Reading : Gordon Breach Sci. Publ. Ltd.
Year: 1995
Subjects: subject: computer aided synthesis
subject: synthesis algorithms
subject: cad for architecture design
subject: stepwise transformation
subject: mapping methodology
subject: data independent algorithms
subject: run time protocol
subject: nonregular dependence graphs
subject: array processor architectures
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: A formal approach for the transformation of computation intensive digital signal processing algorithms into suitable array processor architectures is presented. It covers the complete design flow from algorithmic specifications in a high-level programming language to architecture descriptions in a hardware description language. The transformation itself is divided into manageable design steps and implemented in the CAD-tool DECOMP which allows the exploration of different architectures in a short time. With the presented approach data independent algorithms can be mapped onto array processor architectures. To allow this, a known mapping methodology for array processor design is extended to handle inhomogeneous dependence graphs with nonregular data dependences. The implementation of the formal approach in the DECOMP is an important step towards design automation for massively parallel systems.
A link between Quantum Entanglement, Secant varieties and Sphericity
Creators: name: Sawicki, Adam
name: Tsanov, Valdemar V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we shed light on relations between three concepts studied in representations theory, algebraic geometry and quantum information theory. First - spherical actions of reductive groups on projective spaces. Second - secant varieties of homogeneous projective varieties, and the related notions of rank and border rank. Third - quantum entanglement. Our main result concerns the relation between the problem of the state reconstruction from its reduced one-particle density matrices and the minimal number of separable summands in its decomposition. More precisely, we show that sphericity implies that states of a given rank cannot be approximated by states of a lower rank. We call states for which such approximation is possible exceptional states. For three, important from quantum entanglement perspective cases of distinguishable, fermionic and bosonic particles, we also show that non-sphericity implies the existence of exceptional states. Remarkably, the exceptional states belong to non-bipartite entanglement classes. In particular, we show that the $W$-type states and their appropriate modifications are exceptional states stemming from the second secant variety for three cases above. We point out that the existence of the exceptional states is a physical obstruction for deciding the local unitary equivalence of states by means of the one-particle reduced density matrices. Finally, for a number of systems of distinguishable particles with known orbit structure we list all exceptional states and discuss their possible importance in entanglement theory.
description: 20 pages
On mod p non-abelian Lubin-Tate theory for GL_2(Q_p)
Creators: name: Chojecki, Przemyslaw
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We analyse the mod p étale cohomology of the Lubin-Tate tower both with compact support and without support. We prove that there are no supersingular representations in the H^1_c of the Lubin-Tate tower. On the other hand, we show that in H^1 of the Lubin-Tate tower appears the mod p local Langlands correspondence and the mod p local Jacquet-Langlands correspondence, which we define in the text. We discuss the local-global compatibility part of the Buzzard-Diamond-Jarvis conjecture which appears naturally in this context.
description: 24 pages, submitted
Substrate selectivity of an isolated enoyl reductase catalytic domain from an iterative highly reducing fungal polyketide synthase reveals key components of programming
Creators: name: Roberts, Douglas M.
name: Bartel, Christoph
name: Scott, Alan
name: Ivison, David
name: Simpson, Thomas J.
name: Cox, Russell J.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2017
Subjects: subject: Alkylation
subject: Fungi
subject: Ketones
subject: Olefins
subject: Catalytic domains
subject: Chain extension
subject: Dimeric proteins
subject: Direct observations
subject: High stereoselectivities
subject: Polyketide synthases
subject: Reprotonation
subject: Substrate selectivity
subject: Substrates
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: A cis-acting enoyl reductase (ER) catalytic domain was isolated from a fungal highly reducing iterative polyketide synthase (HR-iPKS) for the first time and studied in vitro. The ER from the squalestatin tetraketide synthase forms a discrete dimeric protein in solution. The ER shows broad substrate selectivity, reducing enoyl species including both natural and unnatural substrates. Pantetheine-bound substrate thiolesters reacted much faster than the corresponding SNAC thiolesters. The unnatural substrates included Z-olefins, 2-ethyl olefins and pentaketides. Methylation of the substrate modifies the activity of the ER such that the 2,4-dimethyl oct-2-enoyl substrate fits into the active site but cannot be reduced. A new NMR-based assay was developed for the direct observation of the stereochemical preferences at the 4′ position of the NADPH cofactor and the C-2 and C-3 positions of the substrates. The assay reveals that the fungal iPKS ER-catalysed reaction is stereochemically identical to that of the vertebrate FAS (vFAS) at the cofactor 4′ position and the substrate 3-position, but the high stereoselectivity displayed by intact SQTKS is lost such that reprotonation at the 2-position is unselective by the isolated ER. A 3D model of ER was consistent with these observations and showed that the ER may sequester its final substrate to prevent further chain extension. The results support a developing model for programming by HR-iPKS in which competition for substrates between restrictive and permissive catalytic domains chaperones the growing polyketide to completion, while allowing for errors and evolution.
Dante's Divina Commedia: Fall Lecture 23 (Purgatorio 8, 9, 10)
Creators: name: Barolini, Teodolinda
Publisher: name: Columbia University
Year: 2015
Subjects: Italian literature

description: Fall Lecture 23 of the course "Dante's Divina Commedia" taught by Teodolinda Barolini, Lorenzo da Ponte Professor of Italian at Columbia University. This iteration of her year-long Dante course was taught in two-hour, twice-weekly sessions during Fall 2015 and Spring 2016 (Dante’s Divina Commedia, Italian W4091 & W4092). Recorded December 1, 2015. 0:00 – Purgatorio 8 32:44 – Purgatorio 9 1:07:57 – Purgatorio 10
Stability, Instability, Canonical Energy and Charged Black Holes
Creators: name: Keir, Joe
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the canonical energy method of Hollands and Wald to study the stability properties of asymptotically flat, stationary solutions to a very general class of theories, consisting of a set of coupled scalar fields and p-form gauge fields, minimally coupled to gravity. We find that, provided certain very weak assumptions are made on the coupling coefficients, the canonical energy method can be extended to this class of theories. In particular, we construct a quadratic form E on initial data perturbations, with the properties that E > 0 on all perturbations indicates stability, while E < 0 on some perturbation indicates instability. Furthermore, we show that the conditions needed for the existence of E allow for a stable definition of asymptotic flatness. Finally, we extend the proof of the Gubser-Mitra conjecture, given by Hollands and Wald, to this class of theories. In particular, this shows that for sufficiently extended, charged black brane solutions to such theories, thermodynamic instability implies dynamical instability.
description: 31 pages
Perfect fluid spacetimes and gradient solitons
Creators: name: De, Krishnendu De Uday Chand
name: Syied, Abdallah Abdelhameed
name: Turki, Nasser Bin
name: Alsaeed, Suliman
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 53C50, 53E20, 53C35, 53E40

description: This article deals with the investigation of perfect fluid spacetimes endowed with concircular vector field. It is shown that in a perfect fluid spacetime with concircular vector field, the velocity vector field annihilates the conformal curvature tensor and in dimension 4, a perfect fluid spacetime is a generalized Robertson-Walker spacetime with Einstein fibre. Moreover, we prove that if a perfect fluid spacetime equipped with concircular vector field admits a second order symmetric parallel tensor, then either the state equation of the perfect fluid spacetime is characterized by $p=\frac{3-n}{n-1}σ$ , or the tensor is a constant multiple of the metric tensor. We also characterize the perfect fluid spacetimes with concircular vector field whose Lorentzian metrics are Ricci soliton, gradient Ricci soliton, gradient Yamabe solitons and gradient $m$-quasi Einstein solitons, respectively.
description: More authors are added in the new version and many mistakes are considered and corrected
Space-Times with Integrable Singularity
Creators: name: Lukash, Vladimir N.
name: Strokov, Vladimir N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the phenomenological approach to study properties of space-time in the vicinity of the Schwarzschild black-hole singularity. Requiring finiteness of the Schwarzschild-like metrics we come to the notion of integrable singularity that is, in a sense, weaker than the conventional singularity and allows the (effective) matter to pass to the white-hole region. This leads to a possibility of generating a new universe there. Thanks to the gravitational field of the singularity, this universe is already born highly inflated ('singularity-induced inflation') before the ordinary inflation starts.
description: 13 pages, 2 figures, IJMPA style
Spatial heterogeneity of flesh-cell osmotic potential in sweet cherry affects partitioning of absorbed water
Creators: name: Grimm, Eckhard
name: Pflugfelder, Daniel
name: Hahn, Jan
name: Schmidt, Moritz Jonathan
name: Dieckmann, Hendrik
name: Knoche, Moritz
Publisher: name: Berlin : Springer Nature
Year: 2020
Subjects: subject: sweet cherry
subject: Prunus avium L.
subject: water partitioning
subject: Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)

description: A fleshy fruit is commonly assumed to resemble a thin-walled pressure vessel containing a homogenous carbohydrate solution. Using sweet cherry (Prunus avium L.) as a model system, we investigate how local differences in cell water potential affect H2O and D2O (heavy water) partitioning. The partitioning of H2O and D2O was mapped non-destructively using magnetic resonance imaging (MRI). The change in size of mesocarp cells due to water movement was monitored by optical coherence tomography (OCT, non-destructive). Osmotic potential was mapped using micro-osmometry (destructive). Virtual sections through the fruit revealed that the H2O distribution followed a net pattern in the outer mesocarp and a radial pattern in the inner mesocarp. These patterns align with the disposition of the vascular bundles. D2O uptake through the skin paralleled the acropetal gradient in cell osmotic potential gradient (from less negative to more negative). Cells in the vicinity of a vascular bundle were of more negative osmotic potential than cells more distant from a vascular bundle. OCT revealed net H2O uptake was the result of some cells loosing volume and other cells increasing volume. H2O and D2O partitioning following uptake is non-uniform and related to the spatial heterogeneity in the osmotic potential of mesocarp cells.
Growth of Highly Crystalline Nickel Particles by Diffusional Capture of Atoms
Creators: name: Sevonkaev, Igor
name: Privman, Vladimir
name: Goia, Dan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report a new approach to achieve growth of highly crystalline nickel nanoparticles over an extended range of sizes (up to 100 nm in diameter) and time scales (up to several hours) by diffusional transport of constituent atoms. The experimental procedure presented offers control of the morphology of the resulting particles and yields base metal nanocrystals suitable for epitaxial deposition of noble metal shells and the preparation of materials with improved catalytic properties. The reported precipitation system also provides a good model for testing a diffusion-driven growth mechanism developed specifically for the reduction process described.
Sufficient conditions for a pseudosymmetric spacetime to be a perfect fluid spacetime
Creators: name: Zhao, Peibiao
name: De, Uday Chand
name: Ünal, Bülent
name: De, Krishnendu
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 53D10, 53D15, 53D25, 53D35

description: The aim of the present paper is to obtain the condition under which a pseudosymmetric spacetime to be a perfect fluid spacetime. It is proven that a pseudosymmetric generalized Robertson-Walker spacetime is a perfect fluid spacetime. Moreover, we establish that a conformally flat pseudosymmetric spacetime is a generalized Robertson-Walker spacetime. Next, it is shown that a pseudosymmetric dust fluid with constant scalar curvature satisfying Einstein's field equations without cosmological constant is vacuum. Finally, we construct a non-trivial example of pseudosymmetric spacetime.
Air Shower Simulation and Hadronic Interactions
Creators: name: Allen, J.
name: Castellina, A.
name: Engel, R.
name: Kasahara, K.
name: Knurenko, S.
name: Pierog, T.
name: Sabourov, A.
name: Stokes, B. T.
name: Ulrich, R.
name: Ostapchenko, S.
name: Sako, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The aim of this report of the Working Group on Hadronic Interactions and Air Shower Simulation is to give an overview of the status of the field, emphasizing open questions and a comparison of relevant results of the different experiments. It is shown that an approximate overall understanding of extensive air showers and the corresponding hadronic interactions has been reached. The simulations provide a qualitative description of the bulk of the air shower observables. Discrepancies are however found when the correlation between measurements of the longitudinal shower profile are compared to that of the lateral particle distributions at ground. The report concludes with a list of important problems that should be addressed to make progress in understanding hadronic interactions and, hence, improve the reliability of air shower simulations.
description: Working Group report given at UHECR 2012 Symposium, CERN, Feb. 2012. Published in EPJ Web of Conferences 53, 01007 (2013)
Vehicle localization using landmarks obtained by a lidar mobile mapping system
Creators: name: Brenner, Claus
Publisher: name: Göttingen : Copernicus GmbH
Year: 2010
Subjects: subject: Mobile Laser Scanning
subject: Feature Extraction
subject: Mapping
subject: Localization
subject: Accuracy
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Accurate and reliable localization in extensive outdoor environments will be a key ability of future driver assistance systems and autonomously driving vehicles. Relative localization, using sensors and a pre-mapped environment, will play a crucial role for such systems, because standard global navigation satellite system (GNSS) solutions will not be able to provide the required reliability. However, it is obvious that the environment maps will have to be quite detailed, making it a must to produce them fully automatically. In this paper, a relative localization approach is evaluated for an environment of substantial extent. The pre-mapped environment is obtained using a LIDAR mobile mapping van. From the raw data, landmarks are extracted fully automatically and inserted into a landmark map. Then, in a second campaign, a robotic vehicle is used to traverse the same scene. Landmarks are extracted from the sensor data of this vehicle as well. Using associated landmark pairs and an estimation approach, the positions of the robotic vehicle are obtained. The number of matches and the matching errors are analyzed, and it is shown that localization based on landmarks outperforms the vehicle's standard GNSS solution.
Campanula rhomboidalis L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C. rhomboidalis L. Cat. 245. l: Outre-Rhone(J.). - 2:Alpenvon Lens (J.); Gampel (Wilczek);Alpen desLötschentales (J.). 3:Um Zinal,häufig(Sulger). - 4: Brig-Termen (B.B.T.Z.); bei der Passerelle von Obermatt nördlichTermen (Thommen). Var. glabrescens Vaccari Forma uniflora Gaudin - 3: La Pierraz am Gr. St. Bernhard (Melly). FormareflexaA. DC.- 3: L'Avernabei Orsieres (Melly). Var. pilosa Vaccari- 3: LaPierrazam Gr. St. Bernhard (Melly). Forma cordifolia Witasek- 3: L'Averna bei Orsieres (Melly). Var. Songeoni Chabert - 3: Les Plangades am Gr. St.Bernhard (M:elly). Var. Mellyana Vaccari - l: La Creuse (Coquoz); Emaney (idem). - 2: Leukerbad (Vulpius). - 3: Bavon ob Liddes (Melly). Var. Goudetiana Beauverd - 3: Fionnay (Goudet).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
The nonlocal Kelvin principle and the dual approach to nonlocal control in the conduction coefficients
Creators: name: Evgrafov, Anton
name: Bellido, Jose C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49J21, 49J45, 49J35, 80M50

description: We explore the dual approach to nonlocal optimal design, specifically for a classical min-max problem which in this study is associated with a nonlocal scalar diffusion equation. We reformulate the optimal design problem utilizing a dual variational principle, which is expressed in terms of nonlocal two-point fluxes. We introduce the proper functional space framework to deal with this formulation, and establish its well-posedness. The key ingredient is the inf-sup (Ladyzhenskaya--Babuska--Brezzi) condition, which holds uniformly with respect to small nonlocal horizons. As a byproduct of this, we are able to prove convergence of nonlocal to local optimal design problems in a straightforward fashion.
Topic Study Group No. 2: Mathematics Education at Tertiary Level
Creators: name: Giraldo, Victor
name: Rasmussen, Chris
name: Biza, Irene
name: Khakbaz, Azimehsadat
name: Hochmuth, Reinhard
Publisher: name: New York, NY : Springer International Publishing
Year: 2017
Subjects: subject: Mathematics education
subject: Pedagogy
subject: Medical education
subject: Medicine
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: [No abstract available]
Dynamics of Bloch oscillating transistor near bifurcation threshold
Creators: name: Sarkar, Jayanta
name: Puska, Antti
name: Hassel, Juha
name: Hakonen, Pertti J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Tendency to bifurcate can often be utilized to improve performance characteristics of amplifiers or even to build detectors. Bloch oscillating transistor is such a device. Here we show that bistable behaviour can be approached by tuning the base current and that the critical value depends on the Josephson coupling energy $E_J$ of the device. We demonstrate record-large current gains for device operation near the bifurcation point at small $E_J$. From our results for the current gains at various $E_J$, we determine the bifurcation threshold on the $E_J$ - base current plane. The bifurcation threshold curve can be understood using the interplay of inter- and intra-band tunneling events.
description: 24 pages, 8 figures
Formation of supermassive black holes in galactic nuclei II: retention and growth of seed intermediate-mass black holes
Creators: name: Askar, Abbas
name: Davies, Melvyn B.
name: Church, Ross P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In many galactic nuclei, a nuclear stellar cluster (NSC) co-exists with a supermassive black hole (SMBH). In this work, we explore the idea that the NSC forms before the SMBH through the merger of several stellar clusters that may contain intermediate-mass black holes (IMBHs). These IMBHs can subsequently grow by mergers and accretion to form an SMBH. To check the observable consequences of this proposed SMBH seeding mechanism, we created an observationally motivated mock population of galaxies, in which NSCs are constructed by aggregating stellar clusters that may or may not contain IMBHs. We model the growth of IMBHs in the NSCs through gravitational wave (GW) mergers with other IMBHs and gas accretion. In the case of GW mergers, the merged BH can either be retained or ejected depending on the GW recoil kick it receives. The likelihood of retaining the merged BH increases if we consider growth of IMBHs in the NSC through gas accretion. We find that nucleated lower-mass galaxies ($\rm M_{\star} \lesssim 10^{9} \ M_{\odot}$; e.g. M33) have an SMBH seed occupation fraction of about 0.3 to 0.5. This occupation fraction increases with galaxy stellar mass and for more massive galaxies ($\rm 10^{9} \ M_{\odot} \lesssim \rm M_{\star} \lesssim 10^{11} \ M_{\odot}$), it is between 0.5 and 0.8, depending on how BH growth is modelled. These occupation fractions are consistent with observational constraints. Furthermore, allowing for BH growth also allows us to reproduce the observed diversity in the mass range of SMBHs in the $\rm M_{\rm NSC} - M_{\rm BH}$ plane.
description: 17 pages, 20 figures, 2 tables, accepted for publication in MNRAS
Tribenzamidomethyl hydrazine
Creators: name: Tanatarec, Jasmina
name: Mikhova, Bozhana
name: Draeger, Gerald
name: Popovski, Emil
Publisher: name: Basel : MDPI AG
Year: 2010
Subjects: subject: Benzamidomethylation
subject: Hydrazine
subject: Prodrug
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: A new tribenzamidomethyl hydrazine was synthesized and its IR, 1H NMR, 13C NMR and MS spectroscopic data are presented.
What is to publish? [O que publicar?]
Creators: name: Vaz, Alexandre Fernandez
name: De Almeida, Felipe Quintao
name: Bassani, Jaison José
Publisher: name: Goiana : Colegio Brasileiro de Ciencias do Esporte
Year: 2016
Subjects: subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::790 | Freizeitgestaltung, Darstellende Kunst

description: [No abstract available]
Low energy architecture in the tropics: from design to building construction
Creators: name: Boyer, Harry
name: Miranville, Frédéric
name: Payet, François
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: This paper presents a realization of passive construction in Reunion, French Department in the Indian Ocean (southern hemisphere) submitted to a wet tropical climate. Aspects of passive construction were integrated at the design stage and this house does not present additional costs towards classical ones. This project was awarded a prize for architecture climate.
An ultra-stable microresonator-based electro-optic dual frequency comb
Creators: name: Lambert, N. J.
name: Trainor, L. S.
name: Schwefel, H. G. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Optical frequency combs emit narrow pulses of light with a stable repetition rate. Equivalently, the generated light spectrum consists of many discrete frequencies spaced by this same repetition rate. These precision light sources have become ubiquitous in applications of photonic technologies because they allow coherent sampling over a broad part of the optical spectrum. The addition of another comb, with a slightly different line spacing, results in a dual comb. Widely used in spectroscopy, dual combs allow one to read out the broad frequency response of a sample in a simple electronic measurement. Many dual comb applications require a high level of mutual coherence between the combs, but achieving this stability can be demanding. Here, by exploiting the rich structure of the nonlinear electro-optic tensor in lithium niobate, we generate ultra-stable dual combs with the two combs naturally having orthogonal polarizations. Our combs have relative linewidths down to 400 microhertz, and require no stabilization or post-processing methods. The ultra-high stability of the spectrum emitted by our device, along with its simplicity of operation and energy efficiency, offer a route to the deployment of robust and versatile dual comb sources.
description: 12 pages, 7 figures
Flow of Navier-Stokes Fluids in Cylindrical Elastic Tubes
Creators: name: Sochi, Taha
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Mathematical Physics (math-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Analytical expressions correlating the volumetric flow rate to the inlet and outlet pressures are derived for the time-independent flow of Newtonian fluids in cylindrically-shaped elastic tubes using a one-dimensional Navier-Stokes flow model with two pressure-area constitutive relations. These expressions for elastic tubes are the equivalent of Poiseuille and Poiseuille-type expressions for rigid tubes which were previously derived for the flow of Newtonian and non-Newtonian fluids under various flow conditions. Formulae and procedures for identifying the pressure field and tube geometric profile are also presented. The results are validated by a finite element method implementation. Sensible trends in the analytical and numerical results are observed and documented.
description: 23 pages, 4 figures, 2 tables
A note on gradient Solitons on two classes of almost Kenmotsu Manifolds
Creators: name: De, Krishnendu
name: De, Uday Chand
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: The purpose of the article is to characterize \textbf{gradient $(m,ρ)$-quasi Einstein solitons} within the framework of two classes of almost Kenmotsu Manifolds. Finally, we consider an example to justify a result of our paper.
Tools and Strategies for Grinding of Riblets on Freeformed Compressor Blades
Creators: name: Denkena, Berend
name: Grove, Thilo
name: Krawczyk, T.
Publisher: name: Amsterdam : Elsevier BV
Year: 2016
Subjects: subject: grindind wheel design
subject: grinding
subject: micro pattern
subject: riblets
subject: Compressors
subject: Efficiency
subject: Friction
subject: Grinding (machining)
subject: Grinding wheels
subject: Machine design
subject: Manufacture
subject: Skin friction
subject: Wear of materials
subject: Wheels
subject: Alternating layers
subject: Compressor blades
subject: Grinding wheel wear
subject: Industrial scale
subject: Manufacturing process
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: A major goal in the design of turbomachinery is the increase of efficiency. To attain this increase, the flow losses must be reduced. A substantial proportion of the losses is generated by skin friction between compressor blades and working fluid. With respect to smooth surfaces, micropatterns (riblet-structures) reduce skin friction in turbulent flow by up to 10%. Grinding with multiprofiled wheels is an effective method for the manufacturing of riblet-structures on large plane surfaces. However, the grinding wheel wear affects the accuracy of the riblet geometry and the efficiency of the manufacturing process. Therefore, this paper shows the potential of different grinding wheel types for the manufacturing of riblet structures on an industrial scale with regard to tool wear. The results show that vitrified bonded tools are not suitable for the structuring of compressor blades. Here, axial forces lead to high profile wear. In contrast, grinding wheels with a metal bond are more wear resistant. However, the dressing process of metal bonded tools is time-consuming and causes 80% of the total machining time. As a consequence, just one blade can be structured per day. To increase the efficiency, a new grinding wheel was developed, which is bionically inspired by beaver teeth. The tool is constructed of alternating layers consisting of metal bonded diamonds and pure resin respectively. With this layer-by-layer setup, the tool does not have to be dressed and enables structuring of up to 50 compressor blades per day.
Risk-based life cycle mim strategy for coastal structures - Effect of pre-existing damages on failure probability
Creators: name: Horstmann, Nannina
name: Hinze, Kerstin
name: Schimmels, Stefan
name: Oumeraci, Hocine
Publisher: name: Reston : American Society of Civil Engineers
Year: 2012
Subjects: subject: Fault tree analysis
subject: Initial damages
subject: Sea and estuary dikes
subject: Weak spots
subject: Coastal structures
subject: Failure Probability
subject: Initial damage
subject: Inspection and maintenance
subject: ITS applications
subject: Life-cycle engineering and managements
subject: Risk-based
subject: Levees
subject: Life cycle
subject: Quay walls
subject: Underwater foundations
subject: Coastal engineering
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: A risk-based strategy for monitoring, inspection and maintenance (MIM) is described as a key component of an overall framework for life-cycle engineering and management. Its application for coastal structures is exemplarily outlined for sea/estuary dikes and harbor quay walls. The necessity of the incorporation of pre-existing damages into this strategy is exemplarily illustrated for quay walls, showing how this will affect the failure probability in comparison to a quay wall without any pre-existing damages.
title: Гипотеза об интерпретации физического смысла характерной величины с размерностью длины в структурно-континуальном подходе механики разрушения хрупких материалов
Creators: name: Аверин, Евгений
Publisher: name: Известия Тульского государственного университета. Науки о земле
Year: 2018

description: Дано описание современного состояния науки в области разрушения различных материалов, в том числе горных пород. Описаны особенности структурноконтинуального подхода механики разрушения. Показаны области применения данного подхода в контексте разрушения горных пород. Предложена интерпретация физического смысла характерной величины d с размерностью длины.
Determination of photodissociation and radiative association cross sections from the same time-dependent calculation
Creators: name: Vranckx, S.
name: Loreau, J.
name: Desouter-Lecomte, M.
name: Vaeck, N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We illustrate some of the difficulties that may be encountered when computing photodissociation and radiative association cross sections from the same time-dependent approach based on wavepacket propagation. The total and partial photodissociation cross sections from the thirty-three vibrational levels of the b triplet Σ+ state of HeH+ towards the 9 other triplet Σ+ and 6 triplet Π n = 2, 3 higher-lying electronic states are calculated. The corresponding radiative association cross sections are extracted from the same calculations, and the photodissociation and radiative association rate constants are determined.
description: 17 pages, 6 figures
The Massive Satellite Population of Milky-Way Sized Galaxies
Creators: name: Rodriguez-Puebla, A.
name: Avila-Reese, V.
name: Drory, N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Several occupational distributions for satellite galaxies more massive than ms~4E7 Msun around MW-sized hosts are presented and used to predict their internal dynamics. For this, a galaxy group mock catalog is constructed on the basis of (sub)halo-to-stellar mass relations constrained with the observed Galaxy Stellar Mass Function decomposed into centrals and satellites, and the 2-point correlation functions. For the MW-sized hosts we find that: 6.6% have 2 satellites in the SMC-LMC mass range; their probabilities to have 1, 2 or 3 satellites equal or larger than the LMC, the SMC or Sgr, respectively, are 0. 26, 0. 14, and 0. 14; those hosts with 3 satellites >= Sgr (as the MW) are among the most common cases, though the most and 2nd most massive satellites in these systems are SMALLER than the LMC and SMC by 0.7 and 0.8 dex, respectively. The cumulative satellite mass function is quite broad, the particular configuration of the MW being of low frequency but NOT an outlier (it is within the upper 1sig yet). For the MW satellite configuration, we constrain the halo mass to be Mh>1.4E12 Msun (1sig level). We find that the abundance of massive subhalos should agree with the abundance of massive satellites in all MW-sized hosts (there is not a massive satellite missing problem for LCDM). However, the vmax of the subhalos of satellites with ms<1E8 Msun is systematically larger than the vmax inferred from current observational studies of the MW bright dwarfs; at difference of previous works, this conclusion is based on an analysis of the overall population of MW-sized galaxies. Some pieces of evidence suggest that the issue could refer only to satellite dwarfs but not to central dwarfs; then, environmental processes associated to dwarfs inside host halos combined with SN-driven core expansion could be at the basis of the lowering of vmax.[Abridged]
description: 10 pages, 6 figures. Accepted for publication in ApJ. arXiv abstract improved
A Low-Power Content-Addressable-Memory Based on Clustered-Sparse-Networks
Creators: name: Jarollahi, Hooman
name: Gripon, Vincent
name: Onizawa, Naoya
name: Gross, Warren J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: A low-power Content-Addressable-Memory (CAM) is introduced employing a new mechanism for associativity between the input tags and the corresponding address of the output data. The proposed architecture is based on a recently developed clustered-sparse-network using binary-weighted connections that on-average will eliminate most of the parallel comparisons performed during a search. Therefore, the dynamic energy consumption of the proposed design is significantly lower compared to that of a conventional low-power CAM design. Given an input tag, the proposed architecture computes a few possibilities for the location of the matched tag and performs the comparisons on them to locate a single valid match. A 0.13 um CMOS technology was used for simulation purposes. The energy consumption and the search delay of the proposed design are 9.5%, and 30.4% of that of the conventional NAND architecture respectively with a 3.4% higher number of transistors.
description: Submitted to IEEE ASAP 2013
The Born approximation in the three-dimensional Calderón problem
Creators: name: Barceló, Juan A.
name: Castro, Carlos
name: Macià, Fabricio
name: Meroño, Cristóbal J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Uniqueness and reconstruction in the three-dimensional Calderón inverse conductivity problem can be reduced to the study of the inverse boundary problem for Schrödinger operators $-Δ+q $. We study the Born approximation of $q$ in the ball, which amounts to studying the linearization of the inverse problem. We first analyze this approximation for real and radial potentials in any dimension $d\ge 3$. We show that this approximation satisfies a closed formula that only involves the spectrum of the Dirichlet-to-Neumann map associated to $-Δ+ q$, which is closely related to a particular moment problem. We then turn to general real and essentially bounded potentials in three dimensions and introduce the notion of averaged Born approximation, which captures the exact invariance properties of the inverse problem. We obtain explicit formulas for the averaged Born approximation in terms of the matrix elements of the Dirichlet to Neumann map in the basis spherical harmonics. To show that the averaged Born approximation does not destroy information on the potential, we also study the high-energy behavior of the matrix elements of the Dirichlet to Neumann map.
description: 36 pages. Changes from v1: updated references, simplified notation for more precision in the statement of theorems 1 and 3 and other minor modifications
The dynamics and flexibility of protein disulphide-isomerase (PDI): predictions of experimentally-observed domain motions
Creators: name: Jimenez-Roldan, J Emilio
name: Bhattacharyya, Moitrayee
name: Wells, Stephen A
name: Römer, Rudolf A
name: Vishweshwara, Saraswathi
name: Freedman, Robert B
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences
subject: 92D20, 92C40

description: We have studied the mobility of the folding catalyst, protein disulphide-isomerase (PDI), by molecular dynamics and by a rapid approach based on flexibility. We analysed our simulations using measures of backbone movement, relative positions and orientations of domains, and distances between functional sites. Despite their different assumptions, the two methods are surprisingly consistent. Both methods agree that motion of domains is dominated by hinge and rotation motion of the a and a' domains relative to the central b-b' domain core. We identify the a' domain as showing the greatest intra-domain mobility. The flexibility method, which requires 10^4-fold less computer power, predicts additional large-scale features of inter-domain motion that have been observed experimentally. We conclude that the methods offer complementary insight into the motion of this large protein and provide detailed structural models that characterise its functionally-significant conformational changes.
description: 20 pages text, 5 figures, and full supplemental information
Trachelium L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C. Trachelium L. Cat. 248 und 429. Verbreitet. Auf der Simplonsüdseite (wie im Goms:vgl.Cat.) vorherrschendmit weissenBlüten.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Scaling of the normal coefficient of restitution for wet impacts
Creators: name: Mueller, Thomas
name: Gollwitzer, Frank
name: Kruelle, Christof
name: Rehberg, Ingo
name: Huang, Kai
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A thorough understanding of the energy dissipation in the dynamics of wet granular matter is essential for a continuum description of natural phenomena such as debris flow, and the development of various industrial applications such as the granulation process. The coefficient of restitution (COR), defined as the ratio between the relative rebound and impact velocities of a binary impact, is frequently used to characterize the amount of energy dissipation associated. We measure the COR by tracing a freely falling sphere bouncing on a wet surface with the liquid film thickness monitored optically. For fixed ratio between the film thickness and the particle size, the dependence of the COR on the impact velocity and various properties of the liquid film can be characterized with the Stokes number, defined as the ratio between the inertia of the particle and the viscosity of the liquid. Moreover, the COR for infinitely large impact velocities derived from the scaling can be analyzed by a model considering the energy dissipation from the inertia of the liquid film.
description: 4 pages, 6 figures, submitted to the Proceedings of Powders and Grains 2013