cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Anomalous diffusion and anisotropic nonlinear Fokker-Planck equation
Creators: name: Lenzi, E. K.
name: Mendes, R. S.
name: Malacarne, L. C.
name: da Silva, L. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyse a bidimensional nonlinear Fokker-Planck equation by considering an anisotropic case, whose diffusion coefficients are $D_x \propto |x|^{-θ}$ and $D_y \propto |y|^{-γ}$ with $θ, γ\in {\cal{R}}$. In this context, we also investigate two situations with the drift force $\vec{F}(\vec{r},t)=(-k_{x}x, -k_y y)$. The first one is characterized by $k_x/k_y=(2+γ)/(2+θ)$ and the second is given by $k_{x}=k$ and $k_{y}=0$. In these cases, we can verify an anomalous behavior induced in different directions by the drift force applied. The found results are exact and exhibit, in terms of the $q$-exponentials, functions which emerge from the Tsallis formalism. The generalization for the $D$-dimensional case is discussed.
description: 6 pages, tex file
Marietta carnesi
Creators: name: Suh, Soo-Jung
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Marietta
Marietta carnesi

description: 4. Marietta carnesi (Howard) (Fig. 3)
 Diagnosis. Body yellow to silvery white; forewing with hyaline cells or infuscated patterns, without hyaline cells along margin and apex; antenna six-segmented (1,1,2,2), scape slender, about 6.0× as long as broad; midlobe of mesoscutum with 14 to 16 setae; gasteral dorsum infuscate brown with sides from base to apex silvery white and a narrow dark brown cross-band on tergum I to V extending to silvery sides, a dark spot on each of silvery sides; legs whitish to pale yellow, with dark brown complete or incomplete bands, tarsi five-segmented.
 Material examined. Korea. GG: 476 Dongtanjiseong-ro, Yeongtong-gu, Suwon-si, 4 females, ex. P. cockerelli on T. cuspidata, 11-vii-2014 (S.J. Suh). CN: 260 Unkyo-ri, Dupo-myeon, Asan-si, 2 males, ex. P. cockerelli on T. cuspidata, 3-vii-2016 (S.J. Suh). JJ: 72 Sumokwon-gil, Jeju-si, 1 female, ex. P. cockerelli on T. cuspidata, 1-xi-2017 (S.J. Suh).
 Remarks. This species is a hyperparasitoid.
description: Published as part of Suh, Soo-Jung, 2018, Parasitoids (Hymenoptera: Chalcidoidea) reared from Pseudaulacaspis cockerelli (Cooley) (Hemiptera: Coccoidea) in the Republic of Korea, pp. 1-6 in Insecta Mundi 612 on page 3, DOI: 10.5281/zenodo.3697168
Solution of a model of SAW's with multiple monomers per site on the Husimi lattice
Creators: name: Oliveira, T. J.
name: Stilck, J. F.
name: Serra, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We solve a model of self-avoiding walks which allows for a site to be visited up to two times by the walk on the Husimi lattice. This model is inspired in the Domb-Joyce model and was proposed to describe the collapse transition of polymers with one-site interactions only. We consider the version in which immediate self-reversals of the walk are forbidden (RF model). The phase diagram we obtain for the grand-canonical version of the model is similar to the one found in the solution of the Bethe lattice, with two distinct polymerized phases, a tricritical point and a critical endpoint.
description: 16 pages, including 6 figures
A sealed ceramic GEM-based neutron detector
Creators: name: Zhou, Jianjin
name: Zhou, Jianrong
name: Zhou, Xiaojuan
name: Zhu, Lin
name: Wei, Yangdong
name: Xu, Hong
name: Wu, Huiyin
name: Wei, Kang
name: Yang, Jianqing
name: Yang, Guian
name: Xie, Yuguang
name: Zhang, Yi
name: Wang, Xiaohu
name: Ding, Baowei
name: Hu, Bitao
name: Sun, Zhijia
name: Chen, Yuanbo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The GEM-based neutron detector has flourished in the past decade. However almost all the GEM-based neutron detectors work in the flow-gas mode, and the long-term performances of the detectors may be unstable due to the dynamic changes of atmospheric pressure and ambient temperature. In this paper, a sealed ceramic GEM-based neutron detector was developed at China Spallation Neutron Source (CSNS) and its sensitive area was 100 mm * 100 mm. The characterizations of the detector were presented and discussed, which included the plateau curve, the neutron beam profile, the neutron wavelength spectrum, the spatial resolution (FWHM: 2.77 mm), the two-dimensional (2D) imaging ability, the neutron detection efficiency and the counting rate instability (Relative Standard Deviation (RSD): 0.7%). The results show that the detector has good performances in sealed mode, and it can be used for the measurement of the direct neutron beam at CSNS.
Response of western larch and douglas-fir to infection by Armillaria ostoyae
Creators: name: Robinson, Richard Myles
Publisher: name: University of British Columbia
Year: 2009

description: Host response to Armillaria ostoyae infection in western larch and Douglas-fir was studied at the macroscopic, microscopic and biochemical level. Examination of lesions resulting from natural infection and inoculation on the roots of 6-85 year old trees showed the events leading to lesion formation on both species of trees was essentially the same. Resinosis and necrophylactic periderm (NP) formation in the roots of trees less than about 10-years-old does not appear to be capable of halting the advance of the fungus. In trees older than about 15 years the infection may become confined, by NP formation, to a lesion in the bark, or by compartmentalization, to woody tissues present at the time of infection. In 18-year-old western larch, NP's with multiple bands of phellem may form around lesions. In many cases these NP's were associated with confined infection. In Douglas-fir trees this response appears to occur between 25 and 35 years of age. Microscopic investigation of wound repair and natural infections on the roots of 10-11- and 25-27-year-old trees, using cryofixation and histology, revealed that the sequence of events and the time involved in wound repair and phellogen renewal was very similar for both species. However, none of the NP's in the infected samples from 11- or 25-year-old Douglas-fir trees were successful in preventing the advance of A. ostoyae. In infected samples collected from the roots of 10- and 27-year-old western larch trees, 68% and 45% respectively had formed NP's which the fungus had not breached. NP's in normal healthy tissues had bands of thin walled phellem (Pe) 1-4 cells wide. NP's formed in response to wounding had bands of Pe 10-15 cells wide and NP's formed in response to infection had bands of Pe up to 25 cells wide. In the roots of both western larch and Douglas-fir, total protein concentrations in infected and browned bark tissues were significantly lower than levels in adjacent, healthy and wounded bark tissues sampled in spring, summer, autumn and winter. Separation of proteins using SDS-PAGE revealed qualitative and quantitative differences in protein profiles between healthy, adjacent and infected root bark samples from both western larch and Douglas-fir trees. In western larch, most of the observed changes may have been associated with physiological changes associated with seasonal variation. However, a 29.3 kDa protein, found in large quantities in the adjacent bark tissues from infected roots of both 11- and 25-year-old Douglas-fir trees, was found to have significant (P=0.013) homology with a chitinase associated with anti-fungal activity in herbaceous plants.
An X-ray bright ERO hosting a type 2 QSO
Creators: name: Severgnini, P.
name: Caccianiga, A.
name: Braito, V.
name: Della Ceca, R.
name: Maccacaro, T.
name: Akiyama, M.
name: Carrera, F. J.
name: Ceballos, M. T.
name: Page, M. J.
name: Saracco, P.
name: Watson, M. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the XMM-Newton and the optical-VLT spectra along with the optical and the near-infrared photometric data of one of the brightest X-ray (F(2-10 keV)~1e-13 erg/s cm^2) extremely red objects (R-K>=5) discovered so far. The source, XBSJ0216-0435, belongs to the XMM-Newton Bright Serendipitous Survey and it has extreme X-ray-to-optical (~220) and X-ray-to-near-infrared (~60) flux ratios. Thanks to its brightness, the X-ray statistics are good enough for an accurate spectral analysis by which the presence of an X-ray obscured (NH>1e22 cm^-2) QSO (L(2-10 keV)=4e45 erg/s) is determined. A statistically significant (~99%) excess around 2 keV in the observed-frame suggests the presence of an emission line. By assuming that this feature corresponds to the iron Kalpha line at 6.4 keV, a first estimate of the redshift of the source is derived (z_x~2). The presence of a high redshift QSO2 has been finally confirmed through dedicated VLT optical spectroscopic observations (z_o=1.985+/-0.002). This result yields to an optical validation of a new X-ray Line Emitting Object (XLEO) for which the redshift has been firstly derived from the X-ray data. XBSJ0216-0435 can be considered one of the few examples of X-ray obscured QSO2 at high redshift for which a detailed X-ray and optical spectral analysis has been possible. The spectral energy distribution from radio to X-rays is also presented. Finally from the near-infrared data the luminosity and the stellar mass of the host galaxy has been estimated finding a new example of the coexistence at high-z between massive galaxies and powerful QSOs.
description: Accepted for publication on A&A; 7 pages, 6 figures
MPEC 2024-A34 : DAILY ORBIT UPDATE (2024 January 4)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

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.
Letter from Frank Hewer to [James] Goldie, July 13, 1910
Creators: name: Hewer, Frank Algernon
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to James Goldie from Frank Hewer, dated July 13, 1910. The letter pertains to financial issues between the two, and includes an attached "Description of Farm" by A. Peet, which describes Rainbow Ranche in detail.
Acción por el clima: Iniciativas para hacer frente a la crisis climática
Creators: name: Alonso-Epelde, Eva
name: Rodríguez-Zúñiga, Alejandro
Publisher: name: Observatorio de la Transición Energética y la Acción Climática (OTEA)
Year: 2021

description: Dar respuesta a la actual crisis climática exige el compromiso y la acción conjunta y coordinada de los gobiernos de todos los países, del sector privado y de la sociedad civil, de modo que se adopten compromisos climáticos ambiciosos y estilos de vida más sostenibles.
title: Okra :
title: Principes directeurs pour la conduite de l’examen de la distinction, de l’homogénéité et de la stabilité.
titleType: Subtitle
Creators: name: International Union For The Protection Of New Varieties Of Plants,
Publisher: name: International Union for the Protection of New Varieties of Plants,
Year: 0
Subjects: Group identity.
New Varieties of Plants
Okra

description: Ces principes directeurs (“principes directeurs d’examen”) visent à approfondir les principes énoncés dans l’introduction générale (document TG/1/3) et dans les documents TGP qui s’y rapportent afin de donner des indications concrètes détaillées pour l’harmonisation de l’examen de la distinction, de l’homogénéité et de la stabilité (DHS) et, en particulier, à identifier des caractères convenant à l’examen DHS et à la production de descriptions variétales harmonisées.
AmpA: A Link Between Actin Polymerization and Cell Migration, Cell Adhesion, and Endocytosis
Creators: name: Noratel, Elizabeth Ford
Publisher: name: Maryland Shared Open Access Repository
Year: 2012
Subjects: Actin
AmpA
Dictyostelium
endocytosis
Migration

description: The ampA gene encodes a secreted protein that modulates cell adhesion, actin polymerization, endocytosis, and cell migration.  AmpA is secreted into the supernatant during development, and remains cell associated during growth.  AmpA loss in growing cells results in an increase in cell adhesion, and a reduction in F actin.   Over expression of AmpA reduces adhesion and increases F actin.  As a result of these changes in the cytoskeleton and in adhesion, I have shown AmpA influences cell migration.   AmpA knockout cells are defective in migration on top of agar compared to wild type. AmpA over expressing cells migrate better than wild type on top of agar.  This defect in the knockout can be rescued by placing the cells in a 3D environment where they migrate under agar.  Knockout cells migrate better than wild type under these conditions and over expressing cells migrate about the same as wild type. In order to visualize actin dynamics in live cells, wild type, AmpA KO and AmpA over-expressing strains were created containing an actin binding domain fused to GFP. In stationary cells, over expressers make more actin rich endosomal cups, which form repeatedly in the same area of the membrane, leading to an increased rate of endocytosis.   Knockout cells have significantly reduced F-actin, but make relatively normal endosomal cups. In order to determine how AmpA affects these processes, localization analyses were performed. Immuno-fluorescence analysis using AmpA tagged to the Tap tag and to mRFP show that AmpA is localized in possible vesicles throughout the cell and also show some localization with calnexin, an ER marker, at discrete sites surrounding the nucleus.  These sites co-localize with p25, a marker for an endosomal recycling compartment.   AmpA can also be found at the cell periphery under certain staining conditions.   Some vesicles should be secretory vesicles, but results indicate that AmpA on the surface is endocytosed back into the cells. This indicates that AmpA is likely bound to the membrane through an interaction with its receptor where it could possibly regulate cell adhesion and actin polymerization.  It is actively endocytosed and proceeds through the membrane recycling pathway.
Development of Technology for Orienting Apples for automated on-line inspection
Creators: name: Narayanan, Priya
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: Engineering, Mechanical (0548)

description: Inspection using machine vision offers the potential for improved food safety and quality. However, effectiveness of fruit inspection has been limited by the difficulty of appropriately orienting fruit for imaging. Commercial orientation systems have had limited impact due to mechanical complexity, cost, error, or some combination thereof. Preliminary tests demonstrated that apples could be oriented by rolling them down a track consisting of two parallel rails. After traversing a short distance, the apples generally moved to an orientation where the stem/calyx axis was perpendicular to the direction of travel and parallel to the plane of the track. The ultimate goal of the current research is to develop a technology using the observed orientation phenomena that could be used in a commercial system for orienting apples. Three different approaches are taken. First, a stability analysis is performed to determine whether this orientation phenomenon can be explained in terms of the inertial characteristics of axially symmetric objects. Rotation of a free body around an axis of axial symmetry is found to be stable, while rotation around an axis perpendicular to this symmetric axis is not. Furthermore, comparisons of action values for two different mathematical models of apples indicate that inertial characteristics can be used to orient apples. Second, experiments are performed to empirically test the orientation phenomena. Apples are rolled down two test tracks each consisting of two parallel wooden rails with three initial orientations of the stem/calyx axis: perpendicular, parallel, or at 45° to the rails. Apples started in a perpendicular position are de facto oriented. Apples started at 45° almost instantly become oriented. For the parallel condition, orientation is delayed and is successful in only about half of trials. Potential methods to improve the performance for the parallel loading condition are discussed. Third, a dynamic model of the orientation process using rigid body dynamics is developed. This model is created using a multi-body dynamic modeling software and takes into account inertial properties of the fruit and nature of contact (friction stiffness). An investigation of the orientation phenomena is first performed using a simulated dynamic model of a rolling ball with a non-uniform mass distribution. The simulations showed that the ball always has the tendency to re-orient itself such that it rotated about the maximum moment of inertia. Experiments are performed and tentative argument is presented toward explaining the behavior. Overall, this research demonstrates that an orientation system based on use of an inclined track potentially is commercially viable.
Isotropic compact stars in 4D Einstein-Gauss-Bonnet gravity
Creators: name: Hansraj, Sudan
name: Banerjee, Ayan
name: Moodly, Lushen
name: Jasim, M. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently it has been proposed that the Gauss-Bonnet coupling parameter of Lovelock gravity may suitably be rescaled in order to admit physically viable models of celestial phenomena such that higher curvature effects are active in standard four dimensions as opposed to the usual higher dimensions. We investigate the consequences of this modification in the context of stellar modelling. The evolution of perfect fluid distributions is governed by the pressure isotropy condition and through stipulation of one of the metric potentials complete models emerge from solutions of the master differential equation. New classes of exact solution with this approach have been reported. One particular model is analysed in detail and shown to comport with elementary physical requirements demanded of realistic compact stars suggesting that the modified theory is not inconsistent with observations.
description: 19 pages, 9 figures, accepted for publication in Class.Quant.Grav
title: Brillouin-LIDAR: Eine empirische Relation zur simultanen Bestimmung von Temperatur- und Salzprofilen
Creators: name: Koestel, Daniel
Publisher: name: UNSPECIFIED
Year: 2024

description: Mit mehr als 70 % bedecken die Ozeane einen bedeutenden Teil der Oberfläche unseres Planeten. Ihre enorme thermische Masse macht sie zu einem wesentlichen Antrieb des globalen Klimas, wobei die größte thermische Kopplung an die Atmosphäre durch Wasser in der obersten Ozeanschicht, der Durchmischungszone, geschieht. Messinstrumente zur Bestimmung ihrer tiefenaufgelösten Temperatur erstrecken sich bisher auf kontaktbasierte Verfahren, die eine lokale Untersuchung akuter Wetterphänomene nicht einschließen. Ein kontaktloses Messverfahren zur Untersuchung der Temperatur in dieser Wasserschicht zur Ergänzung bisheriger Systeme ist daher erstrebenswert.

Ein solches Messsystem kann durch ein Brillouin-LIDAR realisiert werden, das von Laserlicht in Wasser erzeugte spontane Brillouin-Streuung als Temperaturindikator nutzt. Dazu wird die von der Temperatur abhängige Frequenzverschiebung des Rückstreusignals gemessen. Die Strahlquelle stellt dazu intensive Laserpulse von 10 ns Pulsdauer bei einer Wellenlänge von 543,3 nm bereit, die auf das Rubidium-Kantenfilter-basierte Detektorsystem (ESFADOF) angepasst ist. In seiner finalen Version soll ein solches System kompakt, robust und leicht genug sein, um von einem Helikopter aus verwendet werden zu können.

In der vorliegenden Arbeit wurden daher Schritte unternommen, um die Empfindlichkeit des vorhandenen Systems gegenüber äußeren Einflüssen weiter zu minimieren. Es wurde dazu eine vollständige Verspleißung der Strahlquelle voran getrieben, was ein Verspleißen von Doppelkernfasern beinhaltet. Zudem wurde die Empfangsoptik von Grund auf neu entwickelt, um ein möglichst effizientes Aufsammeln des Streusignals aus der gesamten Wassersäule zu gewährleisten.

Die Temperaturbestimmung ist durch ein Brillouin-LIDAR momentan nur unter Kenntnis des Salzgehaltes möglich, weshalb in einem letzten Schritt die spektrale Breite der Brillouin-Streuung in Abhängigkeit der Temperatur und des Salzgehaltes als zusätzlicher Parameter erprobt wurde. Aus den Daten wurde ein empirisches Polynom gewonnen, das für die Zukunft eine simultane Bestimmung von Temperatur und Salzgehalt ermöglicht.
Stable symmetries of plane sextics
Creators: name: Degtyarev, Alex
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H45; 14H30

description: We classify projective symmetries of irreducible plane sextics with simple singularities which are stable under equivariant deformations. We also outline a connection between order~2 stable symmetries and maximal trigonal curves.
Development of an FEA-Based Whole-Body Human Thermal Model for Evaluating Blood Cooling/Warming Techniques
Creators: name: Schappeler, Thomas Evan
Publisher: name: Maryland Shared Open Access Repository
Year: 2009
Subjects: blood
heat transfer
Pennes
perfusion
whole body model

description: Whole- body thermal models can be useful to predict physiological and  thermal responses to clinical treatments and environmental changes. Existing  models extensively simplify body geometry and incompletely or inaccurately  represent the thermal interaction between blood and tissue, producing results of  minimal value. Additionally, existing models often require custom- written  computer code and extensive computational resources, which limit their use. The  present work develops a new whole- body thermal model using a commercially  available FEA software to accurately assess thermal interaction between  vasculature, body tissue, environment, and thermal treatment. This model  proposes a more accurate body geometry, including an internal region  representing vital organs. Body blood is represented as a lumped system, for  which an energy balance equation is developed. This energy balance is coupled  with the energy flow in body tissue, which is modeled by the Pennes bioheat  equation.  The developed model is tested in a case study which evaluates the  effectiveness of inducing hypothermia via intravenous infusion of a mixture of  50% ice/ 50% saline at a rate of 450 ml/ hr. The blood energy balance is  temporally discretized, and simulation is performed in a time- step fashion. Body  temperature distribution and blood temperature are reported at each time step.  Results indicate that body temperature reduction of 0.58° C is obtained in the first  hour of the treatment, and approximately 2.3 hrs are required to achieve a 1.0° C  body temperature decrease. Results can be extrapolated for lengthy treatments.  Agreement with clinical studies suggests potential for the model to be used in  simulating other dynamic thermal processes.
Optimization of Quantum-dot Qubit Fabrication via Machine Learning
Creators: name: Mei, Antonio B.
name: Milosavljevic, Ivan
name: Simpson, Amanda L.
name: Smetanka, Valerie A.
name: Feeney, Colin P.
name: Seguin, Shay M.
name: Ha, Sieu D.
name: Ha, Wonill
name: Reed, Matthew D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Precise nanofabrication represents a critical challenge to developing semiconductor quantum-dot qubits for practical quantum computation. Here, we design and train a convolutional neural network to interpret in-line scanning electron micrographs and quantify qualitative features affecting device functionality. The high-throughput strategy is exemplified by optimizing a model lithographic process within a five-dimensional design space and by demonstrating a new approach to address lithographic proximity effects. The present results emphasize the benefits of machine learning for developing robust processes, shortening development cycles, and enforcing quality control during qubit fabrication.
Does drought advance the onset of autumn leaf senescence in temperature deciduous forest trees: data and R scripts
Creators: name: Mariën, Bertold
name: Dox, Inge
name: J De Boeck, Hans
name: Willems, Patrick
name: Leys, Sebastien
name: Papadimitriou, Dimitri
name: Campioli, Matteo
Publisher: name: Zenodo
Year: 2021
Subjects: Leaf senescence, Breakpoints, Generalized additive models, Drought, Heat stress, Rainfall deficit, Belgium, Fagus sylvatica, Betula pendula, Quercus robur

description: These R scripts and datasets (CSV-files) were used to write the article 'Does drought advance the onset of autumn leaf senescence in temperate deciduous forests' published in the journal Biogeosciences (see https://doi.org/10.5194/bg-2020-337). Please cite the corresponding article from Mariën, B., Dox, I., De Boeck, H., Willems, P., Leys, S., Papadimitriou, D. and Campioli, M. 'Does heat stress and increased atmospheric aridity advance the onset of autumn leaf senescence in temperate deciduous forests' appropriately when using the R scripts or datasets (see https://doi.org/10.5194/bg-2020-337). The R scripts GAM_Nsite, GAM_Betula, GAM_Fagus and GAM_Quercus were used to run the generalized additive models (models 1 – 4) corresponding to the chlorophyll content index and canopy greenness, and to plot their respective smoothers and line plots (Fig. 4 – 7). The corresponding CSV-files are named CCI_Nsite_saplings, Coloration_Nsite_saplings, CCI_Leaf_Fall_mature_trees and Coloration_Leaf_Fall_mature_trees, respectively. The R script Meteo_plot returns the code required to plot the meteorological data from the CSV-files Meteo_Daily_averages_2017_2020 and Brasschaat_SWC (Fig. 2). The R script Plots_Nsite returns the code for plotting the relative humidity, temperature, soil water content and vapor pressure deficit in the glasshouses in Antwerp (Fig. 1). The corresponding CSV-files are named RH_Nsite_2018, Temp_Nsite_2018, SWC_Nsite_2018 and VPD_Nsite_2018, respectively. Plotting the breakpoint data and analyzing the results from the linear mixed models (model 5 – 6) was done using the R script Graphs_and_analyses_breakpoints and the CSV-files named Breakpoints_saplings, Breakpoints_mature_trees_CCI and Breakpoints_mature_trees_Col, respectively.
Multi-wavelength properties of the high-energy bright Seyfert 1 galaxy IGR J18027-1455
Creators: name: Combi, J. A.
name: Ribo, M.
name: Marti, J.
name: Chaty, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A new sample of hard X-ray sources in the Galactic Plane is being revealed by the regular observations performed by the INTEGRAL satellite. The full characterization of these sources is mandatory to understand the hard X-ray sky. Here we report new multifrequency radio, infrared and optical observations of the source IGR J18027-1455, as well as a multi-wavelength study from radio to hard X-rays. The radio counterpart of IGR J18027-1455 is not resolved at any observing frequency. The radio flux density is well fitted by a simple power law with a spectral index alpha=-0.75+/-0.02. This value is typical of optically thin non-thermal synchrotron emission originated in a jet. The NIR and optical spectra show redshifted emission lines with z=0.034, and a broad Halpha line profile with FWHM ~3400 km/s. This suggests an Active Galactic Nucleus (AGN) of type 1 as the optical counterpart of IGR J18027-1455. We confirm the Seyfert 1 nature of the source, which is intrinsically bright at high energies both in absolute terms and when scaled to a normalized 6 cm luminosity. Finally, comparing its X-ray luminosity with isotropic indicators, we find that the source is Compton thin and AGN dominated. This indicates that INTEGRAL might have just seen the tip of the iceberg, and several tens of such sources should be unveiled during the course of its lifetime.
description: 6 pages, 6 figures. Accepted for publication in A&A. Minor changes according to referee report
Relativistic blue- and red-shifted absorption lines in AGNs
Creators: name: Cappi, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Current, accumulating evidence for (mildly) relativistic blue- and red-shifted absorption lines in AGNs is reviewed. XMM-Newton and Chandra sensitive X-ray observations are starting to probe not only the kinematics (velocity) but also the dynamics (accelerations) of highly ionized gas flowing in-and-out from, likely, a few gravitational radii from the black hole. It is thus emphasized that X-ray absorption-line spectroscopy provides new potential to map the accretion flows near black holes, to probe the launching regions of relativistic jets/outflows, and to quantify the cosmological feedback of AGNs. Prospects to tackle these issues with future high energy missions are briefly addressed.
description: 8 pages and 9 figures, to appear in Astronomical Notes (Astron. Nachr.), issue number 2006/10
Random motion theory of an optical vortex in nonlinear birefringent media
Creators: name: Tsuchida, Satoshi
name: Kuratsuji, Hiroshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A theoretical study is presented for the random aspect of an optical vortex inherent in the nonlinear birefringent Kerr effect, which is called the optical spin vortex. We start with the two-component nonlinear Schrödinger equation. The vortex is inherent in the spin texture caused by an anisotropy of the dielectric tensor, for which the role of spin is played by the Stokes vector (or pseudospin). The evolutional equation is derived for the vortex center coordinate using the effective Lagrangian of the pseudospin field. This is converted to the Langevin equation in the presence of the fluctuation together with the dissipation. The corresponding Fokker-Planck equation is derived and analytically solved for a particular form of the birefringence inspired from the Faraday effect. The main consequence is that the relaxation distance for the distribution function is expressed by the universal constant in the Faraday effect and the size of optical vortex. The result would provide a possible clue for future experimental study in polarization optics from a stochastic aspect.
description: 11 pages, 2 figures
Ciência Aberta e Inteligência Artificial: Desafios Éticos e Transparência em Modelos Generativos
Creators: name: Rockembach, Moises
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão Pecha Kucha II, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
de Sitter special relativity
Creators: name: Aldrovandi, R.
name: Almeida, J. P. Beltran
name: Pereira, J. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A special relativity based on the de Sitter group is introduced, which is the theory that might hold up in the presence of a non-vanishing cosmological constant. Like ordinary special relativity, it retains the quotient character of spacetime, and a notion of homogeneity. As a consequence, the underlying spacetime will be a de Sitter spacetime, whose associated kinematics will differ from that of ordinary special relativity. The corresponding modified notions of energy and momentum are obtained, and the exact relationship between them, which is invariant under a re-scaling of the involved quantities, explicitly exhibited. Since the de Sitter group can be considered a particular deformation of the Poincaré group, this theory turns out to be a specific kind of deformed (or doubly) special relativity. Some experimental consequences, as well as the causal structure of spacetime--modified by the presence of the de Sitter horizon--are briefly discussed.
description: V2: Some presentation changes; a new section introduced, with a discussion about possible phenomenological consequences; new references added; version to be published in Classical and Quantum Gravity
Variational principle and energy-momentum tensor for relativistic Electrodynamics of point charges
Creators: name: Lechner, K.
name: Marchetti, P. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give a new representation as tempered distribution for the energy-momentum tensor of a system of charged point-particles, which is free from divergent self-interactions, manifestly Lorentz-invariant and symmetric, and conserved. We present a covariant action for this system, that gives rise to the known Lorentz-Dirac equations for the particles and entails, via Noether theorem, this energy-momentum tensor. Our action is obtained from the standard action for classical Electrodynamics, by means of a new Lorentz-invariant regularization procedure, followed by a renormalization. The method introduced here extends naturally to charged p-branes and arbitrary dimensions.
description: 36 pages, no figures, refs. and comments added
DEVELOPMENT AND ANALYSIS OF A VARIABLE ELECTROMOTIVE FORCE GENERATOR FOR USE IN WIND TURBINE APPLICATIONS
Creators: name: Kendrick, Phillip
Publisher: name: Maryland Shared Open Access Repository
Year: 2012

description: The development of a Variable Electromotive Force Generator (VEMFG) is explored from design conception to physical testing.  The concept revolves around a deconstructed generator, where the stator is allowed to move over the fixed location rotor.  This design allows for a relatively large generator to perform similarly to a small generator when input power is low.  This results in a decrease in the effective minimum speed, as well as an elevation of the maximum operating speed that results in power generation.  This stretching of the operating envelope allows for greater efficiency of a wind turbine, by increasing the effective range of power generating wind speeds. A brief theoretical review of the new generator concept, followed by mechanical design, and finally experimental concept validation will illustrate the advantages of VEMFG.  These experimental results will demonstrate the decrease of the so called cut-in speed, as well as the elevation of the cut-out speed.  Also to be discussed, is an Infinitely Variable Speed Converter (IVSC) and it's application and design implications when used in conjunction with a VEMFG. Finally, a design review will discuss issues of durability, scalability, maintenance, and future applications.  In addition, future areas of research interest will be presented and reviewed.
A new lineage nomenclature to aid genomic surveillance of dengue virus: Genome Detective Dengue Virus Typing Tool
Creators: name: Cleemput, Sara
name: Hill, Verity
name: Deforche, Koen
name: Dumon, Wim
name: Grubaugh, Nathan
Publisher: name: Zenodo
Year: 2024

description: VIRTIGATION Poster presentation during the International Virus Bioinformatics Meeting 2024 in Leuven, Belgium.

The H2020 project VIRTIGATION - Emerging viral diseases in tomatoes and cucurbits: Implementation of mitigation strategies for durable disease management - has received funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 101000570.
title: Nessuno
title: Nessuno
titleType: AlternativeTitle
Creators: name: Μαυροφρύδη, Αλεξάνδρα
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Ταινία μικρού μήκους

description: Η παρούσα πτυχιακή εργασία αναφέρεται στην ταινία μικρού μήκους «Nessuno». Η εργασία περιλαμβάνει δύο μέρη, τη συγγραφή ως επαναπροσδιορισμός της ταυτότητας και τη διαδικασία: από τη θεωρία στην πράξη. Αρχικά, παραθέτω την εισαγωγή και το πρώτο κείμενο που σύγγραψα, το οποίο ήταν η αφορμή για τη δημιουργία του έργου. Στο πρώτο κεφάλαιο προσεγγίζω το έργο από μια φιλοσοφική και ψυχολογική σκοπιά, αναφέροντας διάσημους φιλοσόφους, ψυχολόγους, καλλιτέχνες και ερευνητές. Στο δεύτερο κεφάλαιο περιγράφεται η φάση της παραγωγής και παρατίθενται το σενάριο, το storyboard και το découpage. Η πτυχιακή εργασία ολοκληρώνεται με το τρίτο κεφάλαιο, το οποίο συνιστά τον απόηχο της προσωπικής μου εμπειρίας.
Design, Characterization, Control, and Optimization of a 'Super String' Deployable Truss Structure
Creators: name: Buckler, Matthew Stephen
Publisher: name: Maryland Shared Open Access Repository
Year: 2009

description: Compartment size is often a limiting factor when transporting objects into space leading to multivariable design limits striving for both minimum volume and minimum weight systems and structures. As such, components of systems are often folded or packaged so their stowed volume is significantly reduced. These components are later assembled or deployed once orbit is reached. A novel `Super String' structural concept comprised of carbon fiber longerons and battens connected by hinges that are first free to rotate and subsequently locked to form a rigid structure is presented. Once deployed this structure has a high stiffness-to-mass ratio, because of its sparse box-type construction. A detailed study of a scale technology demonstrator, including design, manufacture of truss deployment machine, motion control with LabVIEW and testing will be presented. Performance of the Super String truss compared to currently used deployable truss systems shows that it has potential applications in kilometer-sized solar sails. Optimization of the Super String is achieved through exploration of material enhancements to improve structural effciency. Improvement of fiber-reinforced composite properties is explored in the form of functionalizing ber surface with Carbon Nanotubes (CNTs). Processing methods, however, are a current limiting factor and have been shown to degrade fiber surfaces and properties. A Shape Memory Polymer (SMP) is considered as a potential means of improving bending stiffness of the structure.
Creation and confirmation of Hopfions in magnetic multilayer systems
Creators: name: Kent, N.
name: Reynolds, N.
name: Raftrey, D.
name: Campbell, I. T. G.
name: Virasawmy, S.
name: Dhuey, S.
name: Chopdekar, R. V.
name: Hierro-Rodriguez, A.
name: Sorrentino, A.
name: Pereiro, E.
name: Ferrer, S.
name: Hellman, F.
name: Sutcliffe, P.
name: Fischer, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological solitons have been studied for decades in classical field theories, and have started recently to impact condensed matter physics. Among those solitons, magnetic skyrmions are two-dimensional particle-like objects with a continuous winding of the magnetization, and magnetic Hopfions are three-dimensional topological solitons that can be formed from a closed loop of a twisted skyrmion string. Whereas intense research is underway with magnetic skyrmions towards a fundamental understanding and potential applications in advanced storage and logic devices, the experimental creation and confirmation of magnetic Hopfions has been elusive so far. Theoretical models suggest that Hopfions can be stabilized in frustrated or chiral magnetic systems, and that target skymions can be transformed into Hopfions by adapting their perpendicular magnetic anisotropy. Here, we present experimental evidence of magnetic Hopfions that were created in magnetic Ir/Co/Pt multilayers shaped into nanoscale disks, which are known to host target skyrmions. The three-dimensional spin texture, which distinguishes magnetic Hopfions from target skyrmions was confirmed by combining two advanced element-specific magnetic X-ray microscopy techniques with about 20-30nm lateral resolution, using X-ray magnetic circular dichroism effect as magnetic contrast mechanism in surface-sensitive X-ray photoemission electron microscopy and bulk-sensitive soft x-ray transmission microscopy. We anticipate that these results will stimulate further investigations of Hopfions with different topologies and their potential application in three-dimensional spintronics devices.
description: 18 pages, 3 figures
Design of a Wing Mechanism for a Perching MAV
Creators: name: Devaud, Dominic Nathaniel
Publisher: name: Maryland Shared Open Access Repository
Year: 2011
Subjects: configurable
kinematics
MAV
mechanism
perching
wing

description: A perching MAV utilizes a mechanism that can change its wings' position with respect to its body in order to reduce its velocity to near-zero for precision landings. This thesis examines current perching technology and applies knowledge from previous work in order to develop two conceptual mechanisms for control of the wings of a perching MAV. The first concept is designed and fabricated as a tool for learning how to apply a perching mechanism to a physical vehicle. The second concept builds on the first and attempts to make the mechanism strong enough to sustain the loads a perching MAV encounters while still being light enough for the vehicle to carry. Kinematic and physical testing are performed on both concepts. The final prototype is installed in an existing flight vehicle. It functions kinematically correct, weighs less than the payload capacity of the aircraft, and can theoretically sustain flight loads, but actuator failures inhibit its ability to fly.
Rezension: "Weihnachtsfilme lesen – Familienordnungen, Geschlechternormen und Liebeskonzepte im Genre" von Andrea Geier, Irina Gradinari und Irmtraud Hnilica (Hg.)
Creators: name: Burger, Michael
Publisher: name: Medienimpulse
Year: 2023

description: Die Herausgeberinnen Andrea Geier, Irina Gradinari und Irmtraud Hnilica hinterfragen in ihrem Sammelband die politischen, ökonomischen und genderrelevanten Aspekte des Weihnachtsfilms. Dabei werden nicht nur die Implikationen der einzelnen Filme in Hinblick auf Race, Class und Gender analysiert, sondern auch das subversive Potential aufgezeigt, wie Weihnachtsfilme die damit verbundenen heteronormativen Vorstellungen in Zweifel ziehen.
description: Medienimpulse, Bd. 61 Nr. 3 (2023): Medialität in der Transition zwischen Elementarbereich und Primarstufe
ENGINEERING PERIPLASMIC BINDING PROTEINS TO DEVELOP POTENTIAL SENSORS TO MEASURE GLUCOSE, GLUTAMINE AND LACTATE
Creators: name: Sriram, Archana
Publisher: name: Maryland Shared Open Access Repository
Year: 2010
Subjects: binding proteins
bioreactors
glucose
glutamine
monitoring

description: Considerable insight has been gained on Periplasmic Binding proteins from E.coli as novel candidates to develop sensors for metabolites like glucose, glutamine and lactate. However, these proteins are still used as assays and for them to become sensors and used repeatedly, require immobilization. Additionally, there is not much information on the application of the sensors in combination with innovative sampling technologies. The first part of the research deals with constructing C- terminal Poly histag Glucose/Galactose binding protein and C-terminal Poly histag lactate binding protein and evaluating their sensing properties. Histag serve the purpose of purification and immobilization of these proteins. Secondly, the application of the Glutamine binding protein form E.coli as a potential sensor to measure glutamine in Mammalian cell cultures in High throughput bioreactors has been shown. Sampling has been done by microdialysis which is a fast and reliable technique. These histagged proteins along with microdialysis demonstrate immense potential to develop continuous monitoring metabolite sensors which have applications in bioprocessing and diagnostics.
A Multiscale Study of Polycyclic Aromatic Hydrocarbon Properties in Galaxies
Creators: name: Galliano, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the present contribution, I summarize a systematic study of ISO and Spitzer mid-IR spectra of Galactic regions and star forming galaxies. This study quantifies the relative variations of the main aromatic features inside spatially resolved objects as well as among the integrated spectra of 50 objects. Our analysis implies that the properties of the PAHs are remarkably universal throughout our sample and at different spatial scales. In addition, the relative variations of the band ratios, as large as one order of magnitude, are mainly controled by the fraction of ionized PAHs. In particular, I show that we can rule out both the modification of the PAH size distribution and the mid-IR extinction, as an explanation of these variations. High values of the I(6.2)/I(11.3) ratio are found to be associated with the far-UV illuminated surface of PDRs, at the scale of an interstellar cloud, and associated with star formation activity, at the scale of a galaxy. Using a few well-studied Galactic regions, we provide an empirical relation between the I(6.2)/I(11.3) ratio and the ionization/recombination ratio G0/ne. Finally, I show that these trends are consistent with the detailed modeling of the PAH emission within photodissociation regions, taking into account the radiative transfer, the stochastic heating and the charge exchange between gas and dust.
description: 14 pages, 16 color figures
1kW 1mJ 8-channel ultrafast fiber laser
Creators: name: Müller, Michael
name: Kienel, Marco
name: Klenke, Arno
name: Gottschall, Thomas
name: Shestaev, Evgeny
name: Plötner, Marco
name: Limpert, Jens
name: Tünnermann, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An ultrafast fiber chirped-pulse amplifier comprising 8 coherently combined amplifier channels is presented. The laser delivers 1 kW average power at 1 mJ pulse energy and 260 fs pulse duration. Excellent beam quality and low noise performance are confirmed. The laser has proven suitable for demanding scientific applications. Further power scaling is possible right away using even more amplifier channels
Rezension: "1923. Der Kampf um die Republik" von Ralf Georg Reuth
Creators: name: Haberich, Max
Publisher: name: Medienimpulse
Year: 2023

description: Reuth führt die Leserinnen und Leser Monat für Monat durch das für die junge Weimarer Republik so kritische Jahr 1923. Er trägt dabei nicht nur der zur Genüge bekannten Bedrohung von rechts, sondern gerade auch der in der Forschung vernachlässigten Bedrohung durch den Kommunismus, wie er in Thüringen und Sachsen regierte, Rechnung. Darüber hinaus macht er deutlich, welche große Herausforderung die Besetzung des Ruhrgebiets für die ohnehin stark geschwächte deutsche Wirtschaft darstellte. Indem die Regierung Gustav Stresemanns diese Krisen bewältigte, sicherte sie das Überleben der ersten deutschen Demokratie.
description: Medienimpulse, Bd. 61 Nr. 3 (2023): Medialität in der Transition zwischen Elementarbereich und Primarstufe
Rezension: "Zeitreisen in Zelluloid. Das Motiv der Zeitreise im Film" von Jörg Helbig und Andreas Rauscher (Hg.)
Creators: name: Burger, Michael
Publisher: name: Medienimpulse
Year: 2023

description: Jörg Helbig und Andreas Rauscher vereinen in ihrem Sammelband vielfältige Zugänge zum Motiv der Zeitreise im Film: neben klassisch narratologischen Herangehensweisen werden auch filmisch-mediale sowie identitätsphilosophische Fragen erörtert. Der Band besticht zudem mit Querverweisen auf Literatur, Game Studies und Geschlechterforschung und bettet die Zeitreise dadurch in einen umfassenderen Kontext ein.
description: Medienimpulse, Bd. 61 Nr. 3 (2023): Medialität in der Transition zwischen Elementarbereich und Primarstufe