cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gastroesophageal intussusception with complete herniation of the spleen in a 12 months old dog with idiopathic megaoesophagus
Creators: name: Rohwedder, Thomas
name: Hellmuth, Viktoria Carolin
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: idiopathic megaoesophagus
subject: gastroesophageal intussusception
subject: dogs
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: A 12 months old, castrated male, mix-breed dog was presented due to acute onset of vomiting, retching, anorexia, and tachypnoea. Idiopathic megaoesophagus was diagnosed three months prior to presentation. Radiographic and CT examination revealed gastroesophageal intussusception with herniation of the complete spleen into the intussusception. After initial stabilization surgical treatment was performed. The stomach and spleen were manually reduced into the abdomen. Due to questionable viability of the gastric wall an inverting suture pattern was used to invaginate the compromised part. Left sided gastropexy was performed to reduce risk of recurrence. Additionally oesophagopexy was performed to reduce the risk of hiatal hernia due to intraoperative damage to the hiatus. The patient recovered uneventful and was discharged from hospital five days following surgery. Conservative treatment of concurrent megaoesophagus was continued. At last follow up, 10 months later, the dog was clinically fine, had gained weight, and showed no signs of regurgitation.
High Resolution Spectroscopy and High Contrast Imaging with the ELT : looking for O$_2$ in Proxima b
Creators: name: Hawker, George A.
name: Parry, Ian R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We research the requirements of High Contrast Imaging when combined with the cross correlation (CC) of high resolution spectra with known spectroscopic templates for detecting and characterising exoplanets in reflected light. We simulate applying the technique to a potentially habitable Proxima b-like planet and show that the O$_2$ A-band spectral feature could feasibly be detected on nearby rocky exoplanets using future instruments on the ELT . The technique is then more widely analysed showing that detections of planets and O$_2$ with signal to noise in the CC function (SNR$_{CC}$) > 3 can be obtained when the signal to noise of the simulated planet spectrum (SNR$_{spec}$) is from 0.25 to 1.2. We place constraints on the spectral resolution, instrument contrast, point spread function (PSF), exposure times and systematic error in stellar light subtraction for making such detections. We find that accurate stellar light subtraction (with 99.99% removal) and PSFs with high spatial resolutions are key to making detections. Lastly a further investigation suggests the ELT could potentially discover and characterise planets of all sizes around different spectral type stars, as well as detecting O$_2$ on Super-Earths with habitable zone orbits around nearby M stars.
description: Accepted for publication in MNRAS; 11 pages, 9 figures
Phlegmariurus mesoamericanus ­­­ (B. Øllgaard) B. Øllgaard 2012
Creators: name: Øllgaard, Benjamin
name: Testo, Weston
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Lycopodiopsida
Lycopodiales
Lycopodiaceae
Phlegmariurus
Phlegmariurus mesoamericanus

description: 2.­­­  Phlegmariurus mesoamericanus ­­­  (B.Øllgaard) B. Øllgaard (2012b: 16). Fig. 16
 Huperzia mesoamericana B. Øllgaard (1993: 67). Type:— PANAMÁ, Prov. Chiriquí: Cerro Hornito, epiphyte, in cloud forest, 6,200 ft., 8 May 1978, Hammel, B. 3061 (MO holotype).
 Pendent, up to 25 cm long. Shoots slightly and gradually tapering from ca. 20–30 mm in diam. incl. leaves at the base to 10–15 mm in distal divisions. Stems excl. leaves 2–3 mm thick at the base. Leaves gradually modified, borne in irregular, alternating whorls of 3, covering the stem. Leaves of basal divisions spreading to perpendicular, elliptic to broadly lanceolate, obtuse to broadly acute, ­­­ 12–15 × 4–5 mm, almost flat, firmly herbaceous to subcoriaceous, somewhat shining, with slightly revolute, entire margins. Leaves of middle and distal divisions gradually smaller, more acute, more arcuately ascending, flat, with flat or slightly revolute margins. Leaves of fully sporangiate divisions 6–8 × 2.5–3 mm. Sporangia 1.5–2 mm wide.
 ­­­ Distribution:— Costa Rica and Panamá, Dominica (Lesser Antilles).
 Habitats:—Epiphyte in cloud forests, 1000–1768 m elev.
 Notes:—A distinct species of uncertain taxonomic affinity. Because it is a pendent epiphyte with gradually heterophyllous shoots and rather wide leaves of firm texture, this species is referred tentatively to the Phlegmariurus taxifolius group. It differs from P. taxifolius by the shorter growth and more compact aspect, by the elliptic to widely lanceolate leaves, 12–15 × 4–5 mm, with obtuse to broadly acute apices, in the basal divisions of the plant, and by the leaves of the densely sporangiate distal divisions 6–8 × 2.5–3 mm, widely lanceolate and flat, with flat or slightly revolute margins. In contrast P. taxifolius has linear-lanceolate to lanceolate leaves, 14–23 × 2–3 mm, in the basal divisions, and the leaves of the densely sporangiate distal divisions 3–8 × 1–1.5 (–2) mm, lanceolate or narrower, usually with a widened and somewhat clasping base, and a long, narrow, involute apex.
 ­­­ Specimens­­­studied:— Chiriquí: Cerro Colorado, 1600 m, Schmalzel 1997 (MO).
 Cerro Colorado, 11.2 km along ridgeroad from main road to Escopeta, 1700 m, Folsom 4873 (MO). Road Landan–Pittí, 1000–1200 m, Correa et al. 2961 (PMA). Cerro Hornito, 1768 m, Hammel 3061 (MO).
description: Published as part of Øllgaard, Benjamin & Testo, Weston, 2021, The Lycopodiaceae of Panamá, pp. 1-66 in Phytotaxa 526 (1) on pages 33-34, DOI: 10.11646/phytotaxa.526.1.1, http://zenodo.org/record/5723180
title: Informationsvermittlung und Shared Decision-Making in der Versorgung von Hämodialysepatienten
Creators: name: Schellartz, Isabell
name: Ohnhäuser, Tim
name: Pfaff, Holger
name: Scholten, Nadine
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Shared Decision-Making (SDM) beschreibt den interaktiven Prozess, bei dem der Arzt und der informierte Patient gemeinsam Entscheidungen über die weitere medizinische Behandlung treffen. Im klinischen Alltag, vor allem in Notfällen, kann dies nicht immer umgesetzt werden. SDM sollte[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 18. Deutscher Kongress für Versorgungsforschung (DKVF)
Error-Correcting Codes on Projective Bundles over Deligne-Lusztig varieties
Creators: name: Portela, Daniel Camazón
name: Ramos, Juan Antonio López
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Theory (cs.IT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94B27, 14G50, 14C17, 14L35

description: The aim of this article is to give lower bounds on the parameters of algebraic geometric error-correcting codes constructed from projective bundles over Deligne--Lusztig surfaces. The methods based on an intensive use of the intersection theory allow us to extend the codes previously constructed from higher-dimensional varieties, as well as those coming from curves. General bounds are obtained for the case of projective bundles of rank $2$ over standard Deligne-Lusztig surfaces, and some explicit examples coming from surfaces of type $A_{2}$ and ${}^{2}A_{4}$ are given.
description: 16 pages
An intelligent household greenhouse system design based on Internet of Things
Creators: name: Han, Zhonghua
name: Wu, Zhenbo
name: Lin, Shuo
name: Luan, Fangjun
Publisher: name: arXiv
Year: 2018
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: In order to combine indoor greenery conservation with Internet of Things (IOT) Technologies, this paper designs an intelligent household greenhouse project with the features of comprehensive sensing, reliable transmission and intelligent processing. Through the analysis of functional requirements of the intelligent household greenhouse system, an intelligent household greenhouse system is designed with the functions of greenhouse environmental data detection, greenhouse environmental control regulation, data remote transmission and human-computer interaction. Its sensor layer collects environmental data in real time based on the ZigBee wireless sensor network. The network layer STM32 intelligent gateway coordinates with network server, so as to exchange data from sensor layer to application layer, and solve the problems of non-blocking of data sending and receiving as well as concurrent requests of multiple mobile terminals. The application layer is designed into two types. One is a desktop management system as a data storage and analysis center, and the other is a mobile terminal APP. At the same time, we design a communication protocol that is applicable to the interaction of the three-layer structure of the Internet of Things, with the characteristics of simplicity, stability, readability, and scalability. It can avoid the mutual influence of multi-level data exchange and ensure the correctness of data circulation. In the design, the system sensor layer ensures stable transmission of various data and instructions, and the network layer has a high degree of concurrency and real time. And various measurement and control data of the sensor layer can interact with the data of mobile-terminal equipment of the application layer. The desktop management system and mobile terminal APP can monitor greenhouse data in real time and control various actuators in the greenhouse.
Non-traditional investors and information processing
Creators: name: Pei, Duo
Publisher: name: No Publisher Supplied
Year: 2021

description: This dissertation investigates the effect of two non-traditional investor types on the information environment of the firm and how their presence may affect the behavior of other market participants, with an emphasis on the processing of information. In the first chapter, I discuss the literature on information processing and the models which are applicable to the settings I examine. In the second chapter, I measure how shareholder activism may change capital market participants’ processing and incorporation of different types of information. Specifically, I examine the earnings response coefficient (ERC), price delay, and probability of informed trading (PIN), which capture the usage of firm-specific public information, public market-wide information, and firm-specific private information, respectively. I find an increase in ERC, price delay, and PIN during shareholder activism. The findings are consistent with a slower reflection of publicly available market-wide information and investors engaging in more public and private firm- specific information processing. Investors appear to substitute more general information with focused information about activist targets in their trading decisions. Additional tests on changes in 10-Qs during the period and cross-sectional tests on activist firm characteristics suggest the information processing switch is a conscious decision by investors. This switch is reflective of the investors’ sensitivity to higher quality information.In the third chapter, I investigate the information content of articles from the crowd-sourced investment advice platform Seeking Alpha, its price informativeness, and the source of its information advantage. A refined textual analysis methodology is employed to extract directional sentiment contents of economic events in coding Seeking Alpha documents. I find the directional sentiment of articles correlate with announcement returns and 90-day drift returns in the post-financial crisis period, incremental to the information in the most recent earnings surprise and earning announcement return. Additionally, the information leads the options market. Option volatility spread and volatility skew respond to news published in articles. Article information are reflected in analyst estimates, resulting in smaller earnings surprises for the subsequent quarter. These results show Seeking Alpha information is incremental to sophisticated investors such as options traders and analysts. Additional tests suggest it may reflect non-public information.
title: Die medizinische Entscheidungsfindung und Berücksichtigung von Patientenpräferenzen aus ärztlicher Sicht
Creators: name: Scholten, Nadine
name: Ohnhäuser, Tim
name: Schellartz, Isabell
name: Pfaff, Holger
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: In Deutschland ist entsprechend der gesetzlichen Aufklärungspflicht nach § 630e Abs. 1 BGB jeder Arzt verpflichtet, den Patienten über alle medizinisch gleichwertigen und indizierten Behandlungsoptionen aufzuklären. Im Zentrum stehen dabei das Selbstbestimmungsrecht [zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 18. Deutscher Kongress für Versorgungsforschung (DKVF)
Traducción y tecnología: herramientas del proceso traductor como actividad profesional. El punto de vista de los estudiantes.
Creators: name: Olalla-Soler, Christian
name: Bolaños, Olga Vert
Publisher: name: figshare
Year: 2019
Subjects: subject: 200323 Translation and Interpretation Studies
subject: FOS: Languages and literature

description: En el presente artículo se describen el conocimiento y el uso de ciertas herramientas y recursos para la traducción de los estudiantes de Traducción e Interpretación de las universidades españolas a partir de los datos obtenidos en una encuesta. La muestra se compone de un total de 85 estudiantes de licenciatura y grado en Traducción e Interpretación de 18 universidades y 19 egresados.
The general form of the star-product on the Grassman algebra
Creators: name: Tyutin, I. V.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the general form of the noncommutative associative product (the star-product) on the Grassman algebra; the star-product is treated as a deformation of the usual "pointwise" product. We show that up to a similarity transformation, there is only one such product. The relation of the algebra ${\cal F}$, the algebra of elements of the Grassman algebra with the star-product as a product, to the Clifford algebra is discussed.
description: 13 pages, LATEX; misprints and English corrected; two references added
Additional file 6 of Transcriptomic analysis of paternal behaviors in prairie voles
Creators: name: Duclot, Florian
name: Liu, Yan
name: Saland, Samantha K.
name: Wang, Zuoxin
name: Kabbaj, Mohamed
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 6. Relationships between parental behavior test behaviors. For each pair of behavior, a linear model was fit. Each individual point represents a distinct animal, and the shaded area depicts the 95% confidence interval.
Trisections, intersection forms and the Torelli group
Creators: name: Lambert-Cole, Peter
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We apply mapping class group techniques and trisections to study intersection forms of smooth 4-manifolds. Johnson defined a well-known homomorphism from the Torelli group of a compact surface. Morita later showed that every homology 3-sphere can be obtained from the standard Heegaard decomposition of $S^3$ by regluing according to a map in the kernel of this homomorphism. We prove an analogous result for trisections of 4-manifolds. Specifically, if $X$ and $Y$ admit handle decompositions without 1- or 3-handles and have isomorphic intersection forms, then a trisection of $Y$ can be obtained from a trisection of $X$ by cutting and regluing by an element of the Johnson kernel. We also describe how invariants of homology 3-spheres can be applied, via this result, to obstruct intersection forms of smooth 4-manifolds. As an application, we use the Casson invariant to recover Rohlin's Theorem on the signature of spin 4-manifolds.
description: 18 pages, 1 figure. Comments welcome
Phlegmariurus polycarpos Kunze 1835
Creators: name: Øllgaard, Benjamin
name: Testo, Weston
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Lycopodiopsida
Lycopodiales
Lycopodiaceae
Phlegmariurus
Phlegmariurus polycarpos

description: 2.­­­ Phlegmariurus polycarpos ­­­  (Kunze) ­­­ B. Øllgaard (2012: 18). ­­­ Fig. 7A
 Lycopodium polycarpos Kunze (1835: 5).— Urostachys polycarpos (Kunze) Herter (1949a: 76).— Huperzia polycarpos (Kunze) B. Øllgaard (1987: 169). Type:— PERU: Peruvia subandina, In sylv. apertioribus, Cassapi, Jul. 1829, Poeppig 1124 (W).
 Urostachys cuatrecasasii Herter (1953 [1954]: 123).— Lycopodium cuatrecasasii (Herter) Morton (1964: 72). Type:— COLOMBIA: Valle, Cord. Occidental, Vertiente Occidental, hoya del río Digua, Piedra de Moler, Aug. 1943, 900– 1180 m, Cuatrecasas 15143A (US holotype).
 Pendulous or recurved, up to 30 cm long. Shoots homophyllous, almost equally thick throughout, 10–15 mm in diam. incl. leaves. Stems excl. leaves 1–1.5 mm thick near the base, tapering to 0.5–1 mm, slightly ridged by decurrent leaf bases. Leaves almost uniform throughout, densely crowded, borne in alternating, irregular, often oblique whorls of 6–7 in basal divisions, these 1–1.5 mm apart, distally (3–) 4, here ca. 1 mm apart, wide-spreading to ascending, often subsecund, usually oblique-falcately curved, usually with vertical lamina due to a twist at the base, linear to filiform, evenly tapering, 6–10 (–12) × 0.4–0.5 mm, often with an abaxially prominent vein near the leaf base, adaxially flat or shallowly canaliculate, with green decurrent leaf bases. Sporangia ca 1 mm wide.
 ­­­ Distribution:— Costa Rica, Panamá, Colombia to Bolivia.
 ­­­ Habitats:—Epiphytic in cloud forest. 700–1200 m elev.
 ­­­ Notes:—Related to Phlegmariurus wilsonii, but usually pendulous, and smaller in all parts, with basally twisted, falcately ascending leaves. From P. sarmentosus it is distinguished by the lack of leaf base auricles. From P. mollicomus it differs in the more patent, twisted leaves, with much less prominent vein.
 ­­­ Specimens­­­ studied:— Chiriquí: Near Fortuna Dam, trail across Quebrada Hornito, 1150 m, McPherson 10580 (MO). Camino to finca Landau, N.E. of Camp Fortuna, dam site, 1100 m, Correa et al. 2135 (PMA). NW of Campamento Fortuna, dam site, 1000–1200 m, Correa et al. 2598 (PMA). Potrero de Pitty S of dam site in Fortuna, Mendoza et al. 213 (PMA). Coclé: Region N of El Valle de Anton, near La Mesa, 1000 m, Allen 2070, 2833 (MO, US). Mountains above El Valle, Stimson 5013 (PMA). 7 km N of El Cope, Alto Calvario, 700–850 m, Folsom 4115 (MO). Cerro Caracoral, near La Mesa, N of El Valle de Anton, 800–1100 m, Knapp 1080 (MO). El Valle–La Mesa road, 730–790 m, Spellman et al. 595 (MO). Veraguas: NW of Santa Fe, Mori & Kallunki 3900 (MO). Panamá: Capira, NE side of Cerro Trinidad, 900 m, Foster 2120 (photo DUKE)
description: Published as part of Øllgaard, Benjamin & Testo, Weston, 2021, The Lycopodiaceae of Panamá, pp. 1-66 in Phytotaxa 526 (1) on pages 35-36, DOI: 10.11646/phytotaxa.526.1.1, http://zenodo.org/record/5723180
Correlation and Dimerization Effects on the Physical Behavior of the $NR_4 [Ni(dmit)_2]_2$ Charge Transfer Salts : A DMRG Study of the Quarter-Filling t-J Model
Creators: name: Doublet, Marie-Liesse
name: Lepetit, Marie-Bernadette
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The present work studies the quasi one-dimensional $Ni(dmit)_2$-based compounds within a correlated model. More specifically, we focus our attention on the composed influence of the electronic dimerization-factor and the repulsion, on the transport properties and the localization of the electronic density in the ground-state. Those properties are studied through the computation of the charge gaps (difference between the ionization potential and the electro-affinity: IP-EA) and the long- and short-bond orders of an infinite quarter-filled chain within a $t-J(t,U)$ model. The comparison between the computed gaps and the experimental activation energy of the semiconductor $NH_2Me_2 [Ni(dmit)_2]_2$ allows us to estimate the on-site electronic repulsion of the $Ni(dmit)_2$ molecule to $1.16eV$.
description: 13 pages, 4 figures, RevTeX
The relationship between surfaces, interfaces, and bulk properties in organometallic halide materials
Creators: name: Ngiam, Jonathan
Publisher: name: Imperial College London
Year: 2020

description: In this work, organometallic halides as a photovoltaic material are investigated. In particular, photovoltaic devices based on the widely used composition MAPbI3 were subjected to a range of degradation stress tests in which the relationship between electrode layers and interfacial phenomena (e.g. metal diffusion, metal-halide formation) were studied to a greater extent with surface characterisation techniques: Time-of-flight secondary ion mass spectrometry (ToF-SIMS), low-energy ion scattering (LEIS), and X-ray photoelectron spectroscopy (XPS). Additioanlly, given the lack of empirically determined surface stoichiometry and discrepancies in reported quantification from XPS, surface stoichiometry of MAPbI3 and compositional analogues are investigated using LEIS and ToF-SIMS. Results suggest that a Cs-deficient surface (at the first atomic layer) exists for Cs-substituted compositions and extrapolating to pure MAPbI3 composition, suggests an MAdeficient surface; consequently a Pb-I rich surface. A significant effort in determining the effect of organic (processing) additives on surface defect passivation was also undertaken. In particular, surface mass spectra show mass fragments derived from corresponding organic additives. Surface stoichiometry of I and Pb was deduced from LEIS and showed a deviation from pristine MAPbI3. These results support the hypothesised surface bonding mechanism(s) as well as the applicability of these techniques in characterising these materials. The interactions of such ion beams and X-ray irradiation are also discussed and show that certain restrictions exist in using these techniques which are laid out in the following work.
title: Kommunikation, Gesundheitskompetenz, soziale Unterstützung: Was hilft Patienten mit einer seltenen Erkrankung dabei, sich im Gesundheitssystem zurechtzufinden?
Creators: name: Ernstmann, Nicole
name: Halbach, Sarah
name: Midding, Evamarie
name: Weber, Rainer
name: Würstlein, Rachel
name: Kowalski, Christoph
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Männlicher Brustkrebs ist eine seltene Erkrankung. Die N-MALE-Studie hat sich zum Ziel gesetzt, die Versorgungssituation männlicher Brustkrebspatienten in Deutschland zu beschreiben und mögliche Versorgungsdefizite zu identifizieren. Erste Ergebnisse zeigen, dass die Patienten[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 18. Deutscher Kongress für Versorgungsforschung (DKVF)
La percepción de los estudiantes de Traducción e Interpretación sobre los estudios en Traducción e Interpretación de España. Un estudio empírico
Creators: name: Olalla-Soler, Christian
name: Hita, Judith Sánchez
name: Junquera, Borja Manuel Prado
Publisher: name: figshare
Year: 2019
Subjects: subject: 200323 Translation and Interpretation Studies
subject: FOS: Languages and literature

description: El objetivo principal de este artículo es presentar un estudio empírico sobre la valoración y la percepción que los estudiantes de Traducción e Interpretación de España hacen sobre la licenciatura y el grado en Traducción e Interpretación. En el estudio se utilizó como instrumento de recogida de datos una encuesta que respondieron 629 sujetos de 22 universidades. Además de medir aspectos como la satisfacción con los estudios, la percepción del grado de preparación para el mundo laboral y la percepción de prioridad de mejora de una serie de aspectos de los grados y licenciaturas en Traducción e Interpretación, el artículo presenta una radiografía del estudiante de Traducción e Interpretación y de sus intereses. Nuestra hipótesis de partida es que la implantación de los grados en Traducción e Interpretación ha modificado la percepción y valoración de los estudiantes sobre los estudios de grado respecto a las licenciaturas en Traducción e Interpretación. Las finalidades de este estudio son las de ofrecer datos empíricos sobre la opinión de los estudiantes de Traducción e Interpretación y sentar unas bases para una posible triangulación de los datos que hemos obtenido con la opinión de los otros agentes involucrados en la formación universitaria de traductores e intérpretes.
Thickness dependent magnetotransport in ultra-thin manganite films
Creators: name: Sun, J. Z.
name: Abraham, D. W.
name: Rao, R. A.
name: Eom, C. B.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: To understand the near-interface magnetism in manganites, uniform, ultra-thin films of La_{0.67}Sr_{0.33}MnO_3 were grown epitaxially on single crystal (001) LaAlO_3 and (110) NdGaO_3 substrates. The temperature and magnetic field dependent film resistance is used to probe the film's structural and magnetic properties. A surface and/or interface related dead-layer is inferred from the thickness dependent resistance and magnetoresistance. The total thickness of the dead layer is estimated to be $\sim 30 Å$ for films on NdGaO_3 and $\sim 50 Å$ for films on LaAlO_3.
description: 11 pages, 4 figures
Delta function singularities in the Weyl tensor at the brane
Creators: name: Mannheim, Philip D.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In a recent paper Shiromizu, Maeda and Sasaki derived the gravitational equations of motion which would hold on a brane which is embedded in a higher dimensional bulk spacetime, showing that even when the Einstein equations are imposed in the bulk, nonetheless the embedding leads to a modification of the Einstein equations on the brane. In this comment on their work we explicitly identify and evaluate a delta function singularity effect at the brane which they do not appear to have discussed in their paper, an effect which, while actually being of interest in and of itself, nonetheless turns out not to modify their reported results.
description: RevTeX, 6 pages
Nonlinear stability of prestressed stayed beam-columns
Creators: name: Wu, Kaidong
Publisher: name: Imperial College London
Year: 2020

description: Slender struts supported with prestressed cable-stays in conjunction with periodically-spaced crossarms distributed longitudinally, offer an attractive, innovative and pragmatic solution to reducing structural self-weight while maintaining buckling strength. The use of the crossarm--stay system generally results in a higher load-carrying capacity. Previous research has been primarily conducted for vertical stayed members, but there is a potential demand for very long struts to be used in the horizontal plane. Hence, the current thesis investigates the buckling and post-buckling behaviour of stayed beam-columns where the axial load and the self-weight act orthogonally to each other. Mechanical modelling is employed to determine the zones of behaviour in the stayed beam-column. Two of the existing three zones for vertical stayed columns are each sub-divided into two further sub-zones owing to self-weight. It is found that there is considerable post-buckling reserve especially at relatively higher prestressing levels, and the arrangement where the upper crossarm is shorter than the lower crossarm has a beneficial effect in some cases. A nonlinear analytical model for prestressed stayed beam-columns with doubly-symmetric and mono-symmetric configurations, based on the Rayleigh--Ritz method, is subsequently presented. It captures modal interactions for perfect geometries explicitly. It is also found that the varying prestressing levels and crossarm length ratios can lead to different buckling modes. From the obtained insight, finite element models are then employed to investigate the post-buckling behaviour including pre-cambering, imperfection and prestressing sensitivities. The actual optimum prestressing force is determined considering ultimate behaviour and efficiency indicators. It is found that mono-symmetric cases are more sensitive to the level of pre-cambering than doubly-symmetric cases, and for cases with upward pre-cambering, mono-symmetric arrangements perform better than their doubly-symmetric counterparts. Moreover, recommended upper and lower limits on prestressing levels are presented. Finally, a set of design equations is proposed based on the findings, such that stayed beam-columns may be used safely in practice.
Cellular coherence: investigations into spatial self-organization
Creators: name: Erkurt, Murat
Publisher: name: Imperial College London
Year: 2020

description: The goal of this Thesis is to investigate spatial self-organization. The cellular coherence is the mechanism of local actioning units ensembled over a network to generate organization. The cells are modeled as computational machines acting through their regulatory networks with di erent types being the attractors of such automata. The self-organized cell types across the tissue is the emergent organism. The work consists of two building blocks: Cellular dynamics and gene regulation. In cellular dynamics, we cellularize continuous space-time dynamics on a general manifold into discrete dynamics on a mesh. Singular attractor is proposed as a novel dynamics that generates tissue-wide symmetry breaking which is key for generating form in an organism. Extending the model to dipolar attractor, it is shown that animal body plans can self-organize by self-generated positional information. In gene regulation, we develop the computron as a generalized computational model of genetic regulatory networks where each gene is a node of the machine and the attractor con gurations are the cell types. We provide a formal set-theoretic framework for embedding the gene regulatory network into a novel metric space, called the diversity space. A measure for complexity of regulation is proposed using entanglement complexity of basin partitioning. Combining cellular dynamics and gene regulation, a model for morphogenesis is presented. In this Thesis, we invented a mechanism for developing fully edged organism forms through self-organization, contributing a mathematical basis to biological theory of development. Whether Nature does it the same way remains to be seen. On the practical front, our work can be used for building self-organizing nano-machinery, and can nd applications in soft robotics and biomimetic architecture.
Understanding Chemical Complexity in Protostellar Outflows L1157-B1 Star Forming Region
Creators: name: Kavak, U.
name: Viannet, T.
Publisher: name: Zenodo
Year: 2019
Subjects: Astrochemistry, L1157, jets and outflows, ISM: molecules

description: During the early evolutionary stages of star formation, molecular outflows are produced by the shocked gas interaction between high-velocity jets driven by the protostar and the ambient material. Shocks quickly release the content of interstellar ices into the gas phase through ice sputtering and trigger a rich endothermic gas-phase chemistry. Spatially resolved molecular outflows are known to be chemically rich with the detection of several dozens of species and provide us a laboratory to test different chemical scenarios. Complex Organic Molecules (COMs), molecules based on carbon chemistry and probably at the origin of the prebiotic chemistry we see in our Solar System, have been routinely detected around protostars in large quantities. The presence of many COMs has been understood as due to warm surface chemistry triggered by UV photolysis. The recent detection of several COMs towards the protostellar outflow prototype L1157-B1 challenges our current understanding of the chemistry producing these COMs. The large distance of the source with respect to the central heating protostar (about 60 arcsec) suggests that the pre-shock material is too cold to efficiently produce COMs through warm surface chemistry. In this project, we theoretically studied the formation and evolution of COMs occurring in molecular outflows. For this purpose, the results of a state-of-the-art 1D physical shock model were applied to a gas-grain astrochemical model in order to assess whether COMs can be produced in molecular outflows through gas-phase chemistry. Then, the results of the model predictions were compared with recent observations carried out with modern sub-millimeter facilities of the prototype outflow L1157-B1.
 It is concluded that dimethyl ether (DME) and methyl formate (MF), the two most abundant COMs in star-forming regions can be produced in significant quantities in shock regions. The production of these COMs in shocks is mostly due to of neutral-neutral chemistry, triggered by the destruction of methanol through reactions involving atomic H forming the CH$_2$OH and CH$_3$O radicals. Nevertheless, it seems that gas-phase chemistry alone only accounts for a significant but not entire part of the observed DME and MF abundances of a few percent with respect to methanol. Alternative pathways, such as cold surface chemistry, for instance, could also play a role.
Isogeometric analysis of linear free-surface potential flow
Creators: name: Akkerman, I.
name: Meijer, J. H. A.
name: Eikelder, M. ten
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper presents a novel variational formulation to simulate linear free-surface flow. The variational formulation is suitable for higher-order finite elements and higher-order and higher-continuity shape functions as employed in Isogeometric Analysis (IGA). The novel formulation combines the interior and free-surface problems in one monolithic formulation. This leads to exact energy conservation and superior performance in terms of accuracy when compared to a traditional segregated formulation. This is confirmed by the numerical computation of traveling waves in a periodic domain and a three-dimensional sloshing problem. The isogeometric approach shows significant improved performance compared to traditional finite elements. Even on very coarse quadratic NURBS meshes the dispersion error is virtually absent.
Refractive index tomography using spherical optical transmission
Creators: name: Maxwell, Jack Hoggarth
Publisher: name: Imperial College London
Year: 2019

description: This thesis describes the theory, experimental development, and results from a novel refractive index (RI) tomographic microscope suitable for laterally unbounded objects. A spherically diverging incident beam is used with lateral object translation in one or two dimensions, allowing different object regions to be sequentially illuminated at different angles. This work was motivated by the need in Brillouin spectromicroscopy (BSM) to combine Brillouin frequency shifts with RI measurements, for objects measuring up to order 100 µm in depth and order 1 mm in width, with a spatial resolution of order 1 µm. In this thesis, a review of the fields of RI tomography and BSM is given, including an overview of the theory, modelling, and results of other RI reconstruction techniques, as well as the theory and experimental developments in BSM. The geometry and theory of the new technique — spherical-transmission RI tomography (ST-RIT) — are presented with modelling and reconstruction methods, where the small-wavelength limiting regime is employed with a specialised implementation of backprojection techniques. Details of a proof-of-concept experimental system are given, before details of the design and construction of µm-scale RI test objects and biologically relevant cartilage samples. The procedure of data collection, processing, and reconstruction is then presented, before the results of reconstructing RI are shown and discussed. Like other tomographic techniques, ST-RIT is limited by the range of incident wave angles transmitted through the object, giving rise to an effect known as the missing cone problem. For this reason, while the constructed system produced reconstructions which conformed to the theory over ~mm lateral scales, it fell short of µm-scale RI localisation. The thesis concludes with a discussion of the efficacy of ST-RIT for the intended application and others, with suggestions for further development of the technique in the future.
MPEC 2025-D53 : 2025 DH1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 DH1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
A spectroscopic study of charge separation in photocatalytic and photoelectrochemical water splitting devices
Creators: name: Moss, Benjamin
Publisher: name: Imperial College London
Year: 2020

description: In this thesis, the physical origin of efficient charge separation in La, Rh co-doped SrTiO3 ‘photocatalyst sheet’ electrodes and BiVO4 photoanodes, modified with a co-catalyst (cobalt-iron Prussian blue), is investigated by means of time resolved in-situ optical spectroscopies and X-ray photoelectron spectroscopy. Chapter 1 provides the motivation for these studies and gives a brief introduction to the field. In Chapter 2, the methods used to produce the materials and devices studied thereafter are outlined. An overview of experimental methods is then given. In Chapter 3, the results of spectroelectrochemistry, X-ray photoelectron spectroscopy and density functional calculations (the latter obtained from collaboration) are combined to produce a simple model of the band structure of doped SrTiO3 materials. It is found that Rh doping introduces filled states above the SrTiO3 valence band, as well as a vacant mid-gap level, which is thought to trap photogenerated electrons. Rh doping also drives a strong downward shift in the position of the Fermi level of SrTiO3. La co-doping leads to the chemical reduction of Rh4+ states, which in turn induces a Rh 4d orbital re-organisation. Remarkably, this effect appears to enable the material to avoid an upward shift in the Fermi level that would otherwise be expected from chemical reduction. In chapter 4, the consequences of the change in electronic structure between Rh doped and La, Rh co-doped SrTiO3 photocatalyst sheet electrodes are explored using time resolved in-situ optical spectroscopies. Under operational conditions, photogenerated electrons in La,Rh doped SrTiO3 persist for 10s of seconds. A similar effect can only be observed in Rh:SrTiO3 under a negative applied potential. This is explained by competing effects of a strong potential drop, driven by a deeply situated Fermi level, and recombination mediated by the mid-gap state in Rh doped SrTiO3. In La, Rh co-doped SrTiO3, the mid-gap state is absent, enabling persistent photogenerated electrons to accumulate across the entire potential window studied. Finally, Chapter 5 examines the reasons why cobalt-iron Prussian blue modification improves the efficiency of BiVO4 photoanodes, using transient and photoinduced absorption spectroscopies. Holes in BiVO4 rapidly transfer to cobalt-iron Prussian blue, leading to hole accumulation at potentials close to the flat-band potential of BiVO4. Multiply oxidised Prussian blue states are found to turn over at a similar rate to unmodified BiVO4, despite an apparent 1 eV loss in energetic driving force. Taken together, these results suggest that cobalt-iron Prussian blue acts by combining an effective interface for charge separation with energy efficient water oxidation catalysis. The chapter ends with a comparison to CoOx another well known and effective co-catalyst, known to exhibit slow hole transfer and water oxidation kinetics despite an ostensibly similar driving force for hole transfer.
Evidence of unconventional superconductivity in the Ni-doped NbB2 system
Creators: name: Renosto, S. T.
name: Lang, R.
name: Diez, E.
name: Corrêa, L. E.
name: da Luz, M. S.
name: Fisk, Z.
name: Machado, A. J. S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this paper, a comprehensive study of the effects of Ni-doping on structural, electrical, thermal and magnetic properties of the NbB2 is presented. Low amounts (\leq 10 %) of Ni substitution on Nb sites cause structural distortions and induce drastic changes in the physical properties, such as the emergence of a bulk superconducting state with anomalous behaviors in the critical fields (lower and upper) and in the specific heat. Ni-doping at the 9 at.% level, for instance, is able to increase the critical temperature (TC) in stoichiometric NbB2 (< 1.3 K) to approximately 6.0 K. Bulk superconductivity is confirmed by magnetization, electronic transport, and specific heat measurements. Both Hc1 and Hc2 critical fields exhibit a linear dependence with reduced temperature (T/TC), and the specific heat deviates remarkably from the conventional exponential temperature dependence of the single-band BCS theory. These findings suggest multiband superconductivity in the composition range from 0.01 \leq x \leq 0.10.
description: Keywords: Multiband superconductivity; NbB2 system; Ni substitution; Linear critical fields
Kondo Screening of Local Moments in a Triangular Triple Quantum Dot Connected to Normal and Superconducting Leads
Creators: name: Hashimoto, Masashi
name: Teratani, Yoshimichi
name: Shirotani, Masaya
name: Nakata, Yukihiro
name: Shimamoto, Masashi
name: Tanaka, Yoichi
name: Yamada, Yasuhiro
name: Oguri, Akira
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the interplay between the Kondo and superconducting (SC) proximity effects, taking place in a triangular triple quantum dot (TTQD) connected to one normal and two SC leads. This system shows various quantum phases. Without the SC leads, the lowest two states that belong to the different spin sectors, $S=0$ and $S=1/2$, become energetically very close to each other near half filling. The singlet one is a Kondo-screened state by conduction electrons from the normal lead, and the doublet one is a resonating valence bond state with unpaired free spin which remains unscreened. Furthermore, when one additional electron enters the TTQD, the ground state becomes a doublet in which the $S=1$ local moment due to the Nagaoka ferromagnetism is partially screened by conduction electrons.The Cooper pairs penetrating into the TTQD from the SC leads reconstruct the wavefunctions and vary the phase boundaries between these quantum states in the parameter space. We calculate ground-state phase diagrams using the numerical renormalization group, and show that the SC proximity effect induces a reentrant transition in-between the three- and four-electron fillings.
description: 7 pages, 3 figures
A superspace embedding of the Wess-Zumino model
Creators: name: Barcelos-Neto, J.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We embed the Wess-Zumino (WZ) model in a wider superspace than the one described by chiral and anti-chiral superfields.
description: 5 pages, Revtex (multicol)
Understanding Water Quality Dynamics of the Lake Water Column using Modular Compositional Learning
Creators: name: McAfee, Bennett
name: Ladwig, Robert
name: Carey, Cayelan
name: Karpatne, Anuj
name: Lofton, Mary
name: Neog, Abhilash
name: Daw, Arka
name: Skoglund, Sophia
name: Hanson, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: limnology
ecology
modeling
lake metabolism
knowledge-guided machine learning
water quality
lake

description: Water quality in lakes is variable throughout the water column. The drivers of this variability are challenging to measure due to the high-frequency measurements required, but we can gain a greater understanding of this variability through modeling. Modular Compositional Learning (MCL) is a framework within the Ecology Knowledge-Guided Machine Learning (Eco-KGML) paradigm that allows ecosystem processes to be segmented and individually modeled using either process-based models or machine learning. Water quality emerges as a result of multiple processes including aquatic metabolism and physics. MCL has the potential to be an effective modeling approach for water quality due to its multi-process nature. We have constructed a one-dimensional lake model using MCL to investigate the relationship between surface and subsurface water quality dynamics to gain a greater understanding of the drivers of variability along the water column.
title: Towards smarter SDN switches
title: revisiting the balance of intelligence in SDN networks
titleType: Subtitle
Creators: name: Weekes, Jonathan
Publisher: name: Lancaster University
Year: 2019
Subjects: SDN
Software Defined Networking (S
Denial of Service

description: Software Defined Networks (SDNs) represent a new model for building networks, in which the control plane is separated from the forwarding plane, allowing for centralised, fine grained control of traffic in the network. The benefits of SDN range widely from reducing operational costs of networks to providing better Quality of Service guarantees to its users. Its application has been shown to increase the efficiency of large networks such as data centers and improve security through Denial of Service mitigation systems and other traffic monitoring efforts. While SDN has been shown to be highly beneficial, some of its core features (e.g separation of control and data planes and limited memory) allow malicious users to carry out Denial of Service (DoS) attacks against the network, reducing its availability and performance. Denial of Service attacks are explicit attempts to prevent legitimate users from accessing a service or resource. Such attacks can take many forms but are almost always costly to its victims, both financially and reputationally. SDN applications have been developed to mitigate some forms of DoS attacks aimed at traditional networks however, its intrinsic properties facilitate new attacks. We investigate in this thesis, the opportunity for such Denial of Service attacks in more recent versions of SDN and extensively evaluate its effect on a legitimate user’s throughput. In light of the potential for such DoS attacks which specifically target the SDN infrastructure (controller, switch flow table etc), we propose that increasing the intelligence of SDN switches can increase the resilience of the SDN network by preventing attack traffic from entering the network at its source. To demonstrate this, we put forward in this thesis, designs for an intelligent SDN Switch and implement two additional functionalities towards realising this design into a software version of the SDN switch. These modules allow the switch to efficiently handle high control plane loads, both malicious and legitimate, to ensure the network continues to provide good service even under such circumstances. Evaluation of these modules indicate they effectively preserve the performance of the network under under high control plane loads far better than unmodified switches, with no notable drawbacks.