cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hummingbirds use banking to achieve faster turns and asymmetrical wingstrokes to achieve tighter turns
Creators: name: Read, Tyson J Gavin
Publisher: name: University of British Columbia
Year: 2015

description: Flying animals are hypothesized to direct the lateral force necessary to execute turns through two methods. The first is force vectoring, which is accomplished by banking the wing stroke plane and body in concert. Through this method, centripetal force is provided by the lateral component of aerodynamic force that is directed into a turn. An alternative hypothesis is that they generate lateral force through asymmetries in wingbeat kinematics between the left and right wings without varying body position. Examples of asymmetrical kinematics could include differences in angle of attack, stroke plane angle, or stroke amplitude. We studied turning hummingbirds as they tracked a revolving feeder to distinguish between these mechanisms. Comparing hovering and turning flight revealed that hummingbirds bank their stroke plane and body into turns and maintain the position of the stroke plane relative to their bodies, supporting a force vectoring mechanism. However, several wingbeat asymmetries were observed during turning, such as the outer wing tip path being higher and flatter, and the inner wing tip path being lower and more scooped than in hovering. Because the centripetal force necessary to complete a turn is determined by translational velocity and turn radius, we created four balanced turning treatments where these aspects of a turn were varied with a revolving feeder to determine how wing and body kinematics change in order to compensate for these challenges. We found that three asymmetric wingbeat kinematic variables were associated with changes in turn radius and two body kinematic variables related to force vectoring were associated with changes in translational velocity. There were no kinematics influenced by both radius and velocity. This suggests wingbeat asymmetries compensate for changes in turning radius and force vectoring is used to compensate for changes in velocity. Thus, rather than force vectoring and wingbeat asymmetries being mutually exclusive, our results indicate that the two mechanisms are used simultaneously and independently to meet different aerodynamic challenges.
Dataset on nicotine-free, nontransgenic tobacco (Nicotiana tabacum l.) edited by CRISPR-Cas9
Creators: name: Schachtsiek, Julia
name: Stehle, Felix
Publisher: name: TU Dortmund
Year: 2019
Subjects: subject: CRISPR-Cas9
subject: Nicotine-free
subject: Gene editing
subject: Nontransgenic
subject: Nicotiana tabacum
subject: Non-addictive
subject: 660

description: This dataset in brief is related to the research letter entitled "Nicotine-free, nontransgenic tobacco (Nicotiana tabacuml.) edited by CRISPR-Cas9" [1]. Cured tobacco products with a significantly reduced nicotine content helps people to overcome their nicotine addiction. Here we summarize additional data and method descriptions of the generation process of a nicotine-free, nontransgenic tobacco plant. This included the cloning, transformation and regeneration of transgenic tobacco plants, followed by the analysis of the nicotine content and genomic modifications caused by CRISPR-Cas9 mediated gene editing. Subsequently, nicotine-free plants were screened for loss of T-DNA cassette, i.e. nontransgenity. Finally, a metabolic footprint was recorded by 1H NMR analysis.
description: Data in Brief;26. 104395
Catalytic low-temperature dehydration of fructose to 5-hydroxymethylfurfural using acidic deep eutectic solvents and polyoxometalate catalysts
Creators: name: Körner, Sam
name: Albert, Jakob
name: Held, Christoph
Publisher: name: TU Dortmund
Year: 2019
Subjects: subject: Biomass dehydration
subject: Carboxylic acid
subject: Alkyl ammonium
subject: HMF
subject: Reaction equilibrium
subject: 660

description: HMF synthesis typically requires high temperature and is carried out in aqueous solutions. In this work, the low-temperature dehydration of fructose to HMF in different deep eutectic solvents (DES) was investigated. We found a very active and selective reaction system consisting of the DES tetraethyl ammonium chloride as hydrogen bond acceptor (HBA) and levulinic acid as hydrogen bond donor (HBD) in a molar ratio of 1:2 leading to a maximum HMF yield of 68% after 120 h at 323 K. The DES still contained a low amount of water at the initial reaction, and water was also produced during the reaction. Considering the DES properties, neither the molar ratio in the DES nor the reaction temperature had a significant influence on the overall performance of the reaction system. However, the nature of the HBA as well as the acidity of the HBD play an important role for the maximum achievable HMF yield. This was validated by measured yields in a DES with different combinations of HBD (levulinic acid and lactic acid) and HBA (choline chloride and tetra-n-alkyl ammonium chlorides). Moreover, addition of vanadium containing catalysts, especially the polyoxometalate HPA-5 (H8PV5Mo7O40) leads to drastically increased reaction kinetics. Using HPA-5 and the DES tetraethyl ammonium chloride—levulinic acid we could reach a maximum HMF yield of 57% after only 5 h reaction time without decreasing the very high product selectivity.
description: Frontiers in chemistry;
PLUG LEMEXLARIGA TERMIK ISHLOV BERISH TEXNOLOGIYASI
Creators: name: Qodirov, Nazirjon
name: Narzullayev, Diyorbek
Publisher: name: Zenodo
Year: 2023

description: Detallarga termik ishlov berib ish resursini oshirishning qator usullari mavjud bo'lib, bu usullar ichida induksion tok bilan yuza toblash alohida o'rin tutadi. Bu usulning muhim xususiyatlari sifatida termik ishlov berilayotgan detalni butun yuzasi bo'yicha, uning alohida qismi yoki asosiy yuklanishni qabul qiluvchi sohalarni toblash mumkinligi, termik ishlov berish vaqtining qisqaligi, detallarni  1 – 5 mm gacha toblash mumkinligi kabilarni keltirish mumkin.
Mechanical and microstructural characterization of arc-welded inconel 625 alloy
Creators: name: Kotzem, Daniel
name: Awd, Mustafa
name: Walther, Frank
name: Beermann, Lucas
Publisher: name: TU Dortmund
Year: 2019
Subjects: subject: Additive manufacturing
subject: Arc welding
subject: Mechanical behavior
subject: High-temperature alloy
subject: 660
subject: Rapid Prototyping
subject: Lichtbogenschweißen
subject: Mechanische Eigenschaft
subject: Hochwarmfeste Legierung

description: The objective of this work was to verify a relatively new fusion-based additive manufacturing (AM) process to produce a high-temperature aerospace material. The nickel-based superalloy Inconel 625 (IN625) was manufactured by an arc-based AM technique. Regarding microstructure, typical columnar-oriented dendritic structure along the building direction was present, and epitaxial growth was visible. The mechanical behavior was characterized by a combination of quasi-static tensile and compression tests, whereas IN625 showed high yield and ultimate tensile strength with a maximum fracture strain of almost 68%. Even quasi-static compression tests at room and elevated temperatures (650 °C) showed that compression strength only slightly decreased with increasing temperature, demonstrating the good high-temperature properties of IN625 and opening new possibilities for the implementation of arc-based IN625 in future industrial applications.
description: Materials;Jg. 12, Heft: 22 | S. 3690-1-3690-10
Simulations and experimental investigations on the acoustic characterisation of centrifugal pumps of different specific speed
Creators: name: Lehr, Christian
name: Linkamp, Andreas
name: Aurich, Daniel
name: Brümmer, Andreas
Publisher: name: TU Dortmund
Year: 2019
Subjects: Centrifugal pump
Pressure pulsation
Acoustic transmission
Scattering parameters
One-dimensional model

description: Subject of discussion are simulations and experimental investigations on the acoustic characterization of three single stage centrifugal pumps of different specific speed. In operation, these pump-types generate pressure pulsation at blade passing frequency, primarily due to rotor-volute-interaction. In order to determine the acoustic excitation it is necessary to know about the pumps’ acoustic transmission parameters. In this paper, a one-dimensional numerical model for transient time-domain simulation is presented, which takes into account the pump geometry as well as the volutes’ structural behaviour by means of the local effective speed of sound. Numerical results for the transmission characteristics of the three different pumps are shown in terms of scattering matrices and evaluated against parameters calculated from measurement results. The experimental analyses are carried out using dynamic pressure sensors in both the suction and the discharge pipe. Assuming solely plane wave propagation, the complex acoustic field on each side is evaluated independently. The so called “two source” method is then used to determine the transmission parameters of the pumps in standstill for a range of frequencies experimentally. Subsequently, the acoustic excitation at varying rotational speed is evaluated by means of measurements at the pumps in operation and presented as monopole and dipole source types for cavitation-free conditions.
description: International journal of turbomachinery, propulsion and power;Vol. 4, (3), 16
Piezoelectric rotator for studying quantum effects in semiconductor nanostructures at high magnetic fields and low temperatures
Creators: name: Yeoh, L. A.
name: Srinivasan, A.
name: Martin, T. P.
name: Klochan, O.
name: Micolich, A. P.
name: Hamilton, A. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report the design and development of a piezoelectric sample rotation system, and its integration into an Oxford Instruments Kelvinox 100 dilution refrigerator, for orientation-dependent studies of quantum transport in semiconductor nanodevices at millikelvin temperatures in magnetic fields up to 10T. Our apparatus allows for continuous in situ rotation of a device through >100deg in two possible configurations. The first enables rotation of the field within the plane of the device, and the second allows the field to be rotated from in-plane to perpendicular to the device plane. An integrated angle sensor coupled with a closed-loop feedback system allows the device orientation to be known to within +/-0.03deg whilst maintaining the sample temperature below 100mK.
description: 8 pages, 5 figures
INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part I: Image Reconstruction
Creators: name: Krivonos, R.
name: Revnivtsev, M.
name: Tsygankov, S.
name: Sazonov, S.
name: Vikhlinin, A.
name: Pavlinsky, M.
name: Churazov, E.
name: Sunyaev, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper is the first in a series devoted to the hard X-ray whole sky survey performed by the INTEGRAL observatory over seven years. Here we present an improved method for image reconstruction with the IBIS coded mask telescope. The main improvements are related to the suppression of systematic effects which strongly limit sensitivity in the region of the Galactic Plane (GP), especially in the crowded field of the Galactic Center (GC). We extended the IBIS/ISGRI background model to take into account the Galactic Ridge X-ray Emission (GRXE). To suppress residual systematic artifacts on a reconstructed sky image we applied nonparametric sky image filtering based on wavelet decomposition. The implemented modifications of the sky reconstruction method decrease the systematic noise in the ~20 Ms deep field of GC by ~44%, and practically remove it from the high-latitude sky images. New observational data sets, along with an improved reconstruction algorithm, allow us to conduct the hard X-ray survey with the best currently available minimal sensitivity 3.7E-12 erg/s/cm2 ~0.26 mCrab in the 17-60 keV band at a 5 sigma detection level. The survey covers 90% of the sky down to the flux limit of 6.2E-11 erg/s/cm2 (~4.32 mCrab) and 10% of the sky area down to the flux limit of 8.6E-12 erg/s/cm2 (~0.60 mCrab).
description: 14 pages, 14 figures, accepted for publication in Astronomy and Astrophysics
title: Perceptions of teamwork in inclusive classrooms
title: Questionnaire for teachers in inclusive classrooms
titleType: AlternativeTitle
Creators: name: Gebhardt, Markus
name: Schwab, Susanne
Publisher: name: TU Dortmund
Year: 2019
Subjects: subject: Inclusive Schools
subject: School Development
subject: Questionnaire
subject: Rating Scale
subject: Inclusive Education
subject: Teamwork
subject: 370
subject: Inklusive Schule
subject: Fragebogen
subject: Schulentwicklung |
subject: Schätzskala |

description: Questionnaire for teachers in inclusive classrooms.
Spitzer spectral line mapping of protostellar outflows: III - H_2 emission in L1448, BHR71, and NGC2071
Creators: name: Giannini, T.
name: Nisini, B.
name: Neufeld, D.
name: Yuan, Y.
name: Antoniucci, S.
name: Gusdorf, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Spitzer-IRS maps of H_2 pure rotational lines from S(0) to S(7) in 3 outflows from Class 0 sources - L1448, BHR71, and NGC2071 - are presented. These lines are used, in conjunction with available rovibrational, near-IR H_2 lines, to probe the physical conditions of the warm gas between hundreds and thousands of Kelvin. We have constructed maps of the molecular hydrogen column density, ortho-to-para ratio and volume density, together with the index beta of the power law describing the distribution of gas temperature. In all three outflows, the present ortho-to-para ratio significantly deviates from the high temperature equilibrium of 3, being on average between 2.0 and 2.3. These low values, that reflect the young age of these flows, are found also in regions of relatively high temperature (~ 1000 K), likely indicating that shocks are occurring in a time shorter than that needed for a complete para to ortho conversion. Density maps indicate upper limits close to LTE conditions, i.e. between 10^6-10^7 cm^-3; moreover we demonstrate, based on the detections of HD emission spots (R(3) and R(4) lines), that a density stratification does exist, with the low density components (10^4-10^5 cm^-3) associated with the coldest gas. The beta index is found in all flows to be above 3.8: this value is consistent with predictions of multiple C-type bow shocks with a range of velocities, some of which insufficient to achieve the temperature at which H_2 partially dissociates. The contribution of H_2 to the total cooling is quantitatively similar to that of other abundant molecules emitting in the far-infrared, such as water and CO; moreover, the luminosity radiated away is comparable with the estimated kinetic energy of the swept-out outflow: this supports the scenario in which the shock from which H_2 is emitted is also capable of accelerating the molecular outflow driven at the shock working surface.
description: 36 pages, 13 figures, to appear in ApJ
Water–soluble choline compounds in human milk : their variation and impact of storage and diet.
Creators: name: Soberanes Garcia, Lynda S.
Publisher: name: University of British Columbia
Year: 2015

description: Choline is an essential nutrient with potentially important roles for infant neurodevelopment. During infancy, choline is usually provided by milk, where is present mostly as water-soluble cholines (WSC). However, published data suggest wide variability in the WSC content with unknown cause, but maternal diet has been suggested as an explanation. It is also unclear if variability results from methodological approach or stability in expressed milk. The objective was to determine the milk WSC content and composition, to determine if variability is present and results from storage, or from expressing WSC/ml, as well as to determine WSC variability within and across women and the potential role of maternal diet. Two studies were conducted: 1) Milk expression and storage on WSC (n=6). Complete milk expressions were analyzed immediately and after different storage conditions. 2) Milk WSC intra and inter-individual variability within one day (n=20), with collection of dietary data. WSC was analyzed using LC-MS/MS and kilocalorie content with a Human Milk Analyzer. ANOVA was used to determine changes in milk WSC following different storage. Correlation analysis was used to explore associations between WSC/ml or kcal, and between maternal diet and milk WSC. Concentration of milk WSC remained similar over short term storage, and only changed when milk was stored for 6 months at -80 °C. Glycerophosphocholine was the most stable WSC;, milk phosphocholine decreased 30% and free choline increased 53 % after 4 hours of storage at room temperature. WSC content and distribution of free choline, phosphocholine and glycerophosphocholine showed wide inter-individual variability, with some women showing high variability at different times in one day. Maternal choline intake was not related to the concentration of milk water-soluble cholines. Only 20% of participants consumed the Adequate Intake=550 mg/d, with eggs as the major food source of choline in the maternal diet. In summary, individual WSC compounds are not stable in expressed milk. The milk WSC content and composition is highly variable across and within women and sampling from one point might not represent infants’ intake. This is the first study addressing the storage and maternal diet as causes for the milk WSC variability.
Small Vertex Cover makes Petri Net Coverability and Boundedness Easier
Creators: name: Praveen, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences
subject: F.2.2; F.4.1
subject: 68R10

description: The coverability and boundedness problems for Petri nets are known to be Expspace-complete. Given a Petri net, we associate a graph with it. With the vertex cover number k of this graph and the maximum arc weight W as parameters, we show that coverability and boundedness are in ParaPspace. This means that these problems can be solved in space O(ef(k,W)poly(n)), where ef(k,W) is some exponential function and poly(n) is some polynomial in the size of the input. We then extend the ParaPspace result to model checking a logic that can express some generalizations of coverability and boundedness.
description: Full version of the paper appearing in IPEC 2010
The SU(2) Black Hole entropy revisited
Creators: name: Engle, Jonathan
name: Noui, Karim
name: Perez, Alejandro
name: Pranzetti, Daniele
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the state-counting problem that arises in the SU(2) black hole entropy calculation in loop quantum gravity. More precisely, we compute the leading term and the logarithmic correction of both the spherically symmetric and the distorted SU(2) black holes. Contrary to what has been done in previous works, we have to take into account "quantum corrections" in our framework in the sense that the level k of the Chern-Simons theory which describes the black hole is finite and not sent to infinity. Therefore, the new results presented here allow for the computation of the entropy in models where the quantum group corrections are important.
description: 31 pages, 8 figures
Probing Quantum Geometry at LHC
Creators: name: Dvali, Gia
name: Gomez, Cesar
name: Mukhanov, Slava
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an evidence, that the volumes of compactified spaces as well as the areas of black hole horizons must be quantized in Planck units. This quantization has phenomenological consequences, most dramatic being for micro black holes in the theories with TeV scale gravity that can be produced at LHC. We predict that black holes come in form of a discrete tower with well defined spacing. Instead of thermal evaporation, they decay through the sequence of spontaneous particle emissions, with each transition reducing the horizon area by strictly integer number of Planck units. Quantization of the horizons can be a crucial missing link by which the notion of the minimal length in gravity eliminates physical singularities. In case when the remnants of the black holes with the minimal possible area and mass of order few TeV are stable, they might be good candidates for the cold dark matter in the Universe.
description: 14 pages, Latex
Probabilistic studies on the shear strength of slender steel fiber reinforced concrete structures
Creators: name: Olalusi, Oladimeji B.
name: Spyridis, Panagiotis
Publisher: name: TU Dortmund
Year: 2020
Subjects: subject: Steel fiber reinforced concrete beam
subject: Shear capacity
subject: Structural design
subject: Model uncertainty
subject: Partial safety factors
subject: Structural reliability
subject: 690

description: Shear failure is a brittle and undesirable mode of failure in reinforced concrete structures. Many of the existing shear design equations for steel fiber reinforced concrete (SFRC) beams include significant uncertainty due to the failure in accurately predicting the true shear capacity. Given these, adequate quantification and description of model uncertainties considering the systematic variation in the model prediction and measured shear capacity is crucial for reliability-based investigation. Reliability analysis must account for model uncertainties in order to predict the probability of failure under prescribed limit states. This study focuses on the quantification and description of model uncertainty related to the current shear resistance predictive models for SFRC beams without shear reinforcement. The German (DAfStB) model displayed the lowest bias and dispersion, whereas the fib Model 2010 and the Bernat et al., model displayed the highest bias and dispersion. The inconsistencies observed in the resistance model uncertainties at the variation of shear span to effective depth ratio are a major cause for concern, and differentiation with respect to this parameter is advised. Finally, in line with the EN 1990 semi-probabilistic approach for reliability-based design, the global partial safety factors related to model uncertainties in the shear resistance prediction of SFRC beams are proposed.
description: Applied Sciences;Vol. 10. 2020, 19, 6955
Highly Tunable Hybrid Quantum Dots with Charge Detection
Creators: name: Rössler, C.
name: Küng, B.
name: Dröscher, S.
name: Choi, T.
name: Ihn, T.
name: Ensslin, K.
name: Beck, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In order to employ solid state quantum dots as qubits, both a high degree of control over the confinement potential as well as sensitive charge detection are essential. We demonstrate that by combining local anodic oxidation with local Schottky-gates, these criteria are nicely fulfilled in the resulting hybrid device. To this end, a quantum dot with adjacent charge detector is defined. After tuning the quantum dot to contain only a single electron, we are able to observe the charge detector signal of the quantum dot state for a wide range of tunnel couplings.
title: Effect of the Electric Field Vector Change on the Efficacy of Nanosecond Pulse Trains in 2D and 3D Cell Models
Creators: name: Kim, Vitalii
name: Semenov, Iurii
name: Karpov, Nikolas
name: Pakhomov, Andrei G.
Publisher: name: Old Dominion University Libraries
Year: 2023

description: A phenomenon of bipolar cancellation stands for the suppression of bioeffects of nanosecond electric pulses (nsEP) when the electric field polarity is reversed. In contrast, the bioeffects of unipolar nsEP can be increased at sub-MHz frequency (summation effect). To explore cell responses at all other angles of electric field vector change, we employed an isosceles triangle and a pyramid electrode configurations for 2D and 3D cell models, respectively. In both cases, the electrode at the apex was always connected to the ground, while the other two electrodes were energized in alternation. This way, the electric field lines from either active electrode converged on the apex electrode, merging into a single long pulse. In other words, the electric field direction between the electrodes at the base of the triangle (pyramid) changed by 180°, but this angle gradually decreased to 0° closer to the apex electrode.

Experiments with ablation of BPAE cell monolayers by 0.833 kHz 600-ns pulses showed maximum bipolar cancellation (13-fold vs a unipolar pulse) at 180° vector change. At angles less than 90°-120°, cancellation was replaced by summation, i.e., the effects became stronger (3-fold at 22°). The cancellation of nsEP effects near the base electrodes and the summation of them close to the apex electrode led to focal (one electrode) cell electroporation. Similarly, experiments with 3D cell model (potato tissues) and the pyramid electrode configuration qualitatively showed the ablated area near the apex electrode only.

Additionally, we employed this technique to evoke electroporation and excitation (measured by Ca2+ mobilization) in smooth muscle cell monolayers. The cell response was observed near the apex electrode while avoiding it at two base electrodes, despite the stronger electric field there.

Lastly, strobe imaging revealed a nanosecond kinetics of membrane potential change in single CHO-K1 cells upon sub-MHz nsEP train stimulation. The temporal summation of membrane polarization occurred near the apex electrode, in contrast to area between the base electrodes.

These findings can be essential for multielectrode treatments including focal cancer ablation and brain stimulation.
Orbifold homeomorphism finiteness based on geometric constraints
Creators: name: Proctor, Emily
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C23, 53C20, 58J53

description: We show that any collection of n-dimensional orbifolds with sectional curvature and volume uniformly bounded below, diameter bounded above, and with only isolated singular points contains orbifolds of only finitely many orbifold homeomorphism types. This is a generalization to the orbifold category of a similar result for manifolds proven by Grove, Petersen, and Wu. It follows that any Laplace isospectral collection of orbifolds with sectional curvature uniformly bounded below and having only isolated singular points also contains only finitely many orbifold homeomorphism types. The main steps of the argument are to show that any sequence from the collection has subsequence that converges to an orbifold, and then to show that the homeomorphism between the underlying spaces of the limit orbifold and an orbifold from the subsequence that is guaranteed by Perelman's stability theorem must preserve orbifold structure.
description: To appear in Ann. Glob. Anal. Geom
The Search for signals of technological activities in the galaxy
Creators: name: Lemarchand, Guillermo A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In this article an analysis of the fundamentals used to search for extraterrestrial artificial signals in the galaxy, which have been developing for more than five decades, is presented. It is shown that the key factor for the success of these research projects is given by the technological civilizations lifetimes. Assuming the Principle of Mediocrity, estimations are made to determine the minimum number of civilizations that may co-exist in the galaxy and the probability of detecting a signal from them.
description: In Spanish, 30 pages, 8 figures, 3 tables, UNESCO, ICTP, TWAS, Second Iberoamerican School on Astrobiology, Montevideo, September 2009
Amtliche Mitteilungen der Universität Dortmund Nr. 07/78
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1978
Subjects: subject: 080

description: Änderung der Benutzungsordnung der im zentralen Bibliotheksgebäude der Universität untergebrachten Bibliothekseinrichtungen der Universität Dortmund, der Pädagogischen Hochschule Ruhr und der Fachhochschule Dortmund
description: Berichtigung der AM Nr. 6/78 vom 21.4. 1978, hier: Änderung der Promotionsordnung für die Abteilung Elektrotechnik der Universität Dortmund
description: Verlängerung der Genehmigungsfrist der vorläufigen Diplomprüfungsordnung der Abt. Bauwesen
description: Verlängerung der Genehmigungsfrist der vorläufigen Diplom-Prüfungsordnung für die Diplomprüfung im Fach Informatik
description: Amtliche Mitteilungen der Universität Dortmund ; 7, 1978
Correspondence between Jordan-Einstein frames and Palatini-metric formalisms
Creators: name: Capozziello, Salvatore
name: Darabi, Farhad
name: Vernieri, Daniele
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the conformal symmetry between Jordan and Einstein frames considering their relations with the metric and Palatini formalisms for modified gravity. Appropriate conformal transformations are taken into account leading to the evident connection between the gravitational actions in the two mentioned frames and the Hilbert-Einstein action with a cosmological constant. We show that the apparent differences between Palatini and metric formalisms strictly depend on the representation while the number of degrees of freedom is preserved. This means that the dynamical content of both formalism is identical.
description: 6 pages, to appear in Mod. Phys. Lett. A
Realization of Center Symmetry in Two Adjoint Flavor Large-N Yang-Mills
Creators: name: Catterall, Simon
name: Galvez, Richard
name: Unsal, Mithat
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We report on the results of numerical simulations of $SU(N)$ lattice Yang Mills with two flavors of (light) Wilson fermion in the adjoint representation. We analytically and numerically address the question of center symmetry realization on lattices with $Γ$ sites in each direction in the large-$N$ limit. We show, by a weak coupling calculation that, for massless fermions, center symmetry realization is independent of $Γ$, and is unbroken. Then, we extend our result by conducting simulations at non zero mass and finite gauge coupling. Our results indicate that center symmetry is intact for a range of fermion mass in the vicinity of the critical line on lattices of volume $2^4$. This observation makes it possible to compute infinite volume physical observables using small volume simulations in the limit $N\to\infty$, with possible applications to the determination of the conformal window in gauge theories with adjoint fermions.
description: 15 pages, 9 figures
The world as a garden : a philosophical analysis of natural capital in economics
Creators: name: DesRoches, Christopher Tyler
Publisher: name: University of British Columbia
Year: 2015

description: This dissertation undertakes a philosophical analysis of “natural capital” and argues that this concept has prompted economists to view Nature in a radically novel manner. Formerly, economists referred to Nature and natural products as a collection of inert materials to be drawn upon in isolation and then rearranged by human agents to produce commodities. More recently, nature is depicted as a collection of active, modifiable, and economically valuable processes, often construed as ecosystems that produce marketable goods and services gratis. Nature is depicted as consisting of various unproduced mechanisms or “natural machines” that are first discovered and then channeled so as to serve human ends. In short, nature as an ideal is a kind of garden that is characterized by natural objects purposefully arranged by intentional human agents. This dissertation first lays out working definitions of the key terms, such as capital and Nature, and then traces the historical roots of natural capital in the writings of eminent classical political economists, such as Adam Smith, John Stuart Mill, and Karl Marx. I then examine the question of substitutes for “critical natural capital”, and argue that the preservation paradox is warranted: no one can restore or preserve a part of Nature without turning it into an artifact. Following the recent work of Debra Satz and Michael Sandel, I finish my dissertation by situating the question of natural capital in the broader context of whether some goods should not be for sale, particularly those I define as Basic Ecological Goods.
A Fossil Bulge Globular Cluster revealed by VLT Multi-Conjugate Adaptive Optics
Creators: name: Ortolani, Sergio
name: Barbuy, Beatriz
name: Momany, Yazan
name: Saviane, Ivo
name: Bica, Eduardo
name: Jilkova, Lucie
name: Salerno, Gustavo Malta
name: Jungwiert, Bruno
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The globular cluster HP1 is projected on the bulge, very close to the Galactic center. The Multi-Conjugate Adaptive Optics (MCAO) Demonstrator (MAD) at the Very Large Telescope (VLT) allowed to acquire high resolution deep images that, combined with first epoch New Technology Telescope (NTT) data, enabled to derive accurate proper motions. The cluster and bulge field stellar contents were disentangled by means of this process, and produced unprecedented definition in the color-magnitude diagrams for this cluster. The metallicity of [Fe/H] ~ -1.0 from previous spectroscopic analysis is confirmed, which together with an extended blue horizontal branch, imply an age older than the halo average. Orbit reconstruction results suggest that HP1 is spatially confined within the bulge.
MEGACEPHALA (GRAMMOGNATHA) EUPHRATICA QO'NG'IZINING JANUBIY OROL BO'YI HUDUDIDAGI TARQALISHI (COLEOPTERA: CICINDELIDAE).
Creators: name: Madireymov, Sh.R.
Publisher: name: Zenodo
Year: 2025

description: Megacephala euphratica qo‘ng‘izi  Misr, Yaqin Sharq va Markaziy Osiyodagi tarqalishi tahlil qilinib, uning pastki turlari bo‘yicha mahalliy uchrashuv joylari keltirilgan. M. e. euphratica uchun yangi uchrashuv joylari quyidagilardir: Turkiya (Egey sohilida Izmir-Selçuk hududi, O‘rta yer dengizi sohilida Göksu, Seyhan/Ceyhan va Asi daryolari deltalarida), Suriya (Dayr az Zor), Saudiya Arabistoni (Riyod va Burayda ichki hududlari). M. e. armeniaca uchun yangi uchrashuv joyi Qozog‘iston (Aydarko‘l) va Qoraqalpog'iston(Xo'jayli) .
Asian Panethnicity in North America: How Pan-Asian Grocery Stores and Food Blogs Build Pan-Asian Culture
Creators: Nicole Aubin
Publisher: name: University of Alberta Library
Year: 2022

Living in highly globalized societies, it is becoming popular for individuals to form

relationships and affinities with external sources of culture that are not from their own biological

ethnicity, which troubles traditional definitions of identity. The concept of panethnicity, where

various distinct ethnicities coalesce under a broader ethnic grouping based on common

experiences, shared interests, and/or political factors, becomes increasingly relevant to

discussions of identity and culture. This essay examines how Asian panethnicity in North

America is negotiated and reflected through Asian food culture. Specifically, it explores how

physical and digital sites of Asian panethnicity grounded in food, namely Asian grocery stores

and Asian food social media blogging, promote a distinct panethnic Asian culture and identity in

North America. Through analysis of these spaces and the people behind them, combined with a

literary analysis of the autobiography Crying in H Mart by Michelle Zauner, this essay also

explores how Asian Americans and Asian Canadians engage and identify with panethnic Asian

culture.
Bruno Touschek: particle physicist and father of the electron-positron collider
Creators: name: Bonolis, Luisa
name: Pancheri, Giulia
Publisher: name: arXiv
Year: 2011
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: This article gives a brief outline of the life and works of the Austrian physicist Bruno Touschek, who conceived, proposed and, 50 years ago, brought to completion the construction of AdA, the first electron-positron storage ring. The events which led to the approval of the AdA pro ject and the Franco-Italian collaboration which con- firmed the feasibility of electron-positron storage rings will be recalled. We shall illustrate Bruno Touschek's formation both as a theoretical physicist and as an expert in particle accelerators during the period be- tween the time he had to leave the Vienna Staat Gymnasium in 1938, because of his Jewish origin from the maternal side, until he arrived in Italy in the early 1950s and, in 1960, proposed to build AdA, in Frascati. The events which led to Touschek's collaboration with Rolf Wideroe in the construction of the first European betatron will be de- scribed. The article will make use of a number of unpublished as well as previously unknown documents, which include an early correspon- dence with Arnold Sommerfeld and Bruno Touschek's letters to his family in Vienna from Italy, Germany and Great Britain. The impact of Touschek's work on students and collaborators from University of Rome will be illustrated through his work on QED infrared radiative corrections to high energy e+e- experiments and the book Meccanica Statistica.
description: To be published in EPJH
Biases in, and corrections to, KSB shear measurements
Creators: name: Viola, M.
name: Melchior, P.
name: Bartelmann, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyse the KSB method to estimate gravitational shear from surface-brightness moments of small and noisy galaxy images. We identify three potentially problematic assumptions. These are: (1) While gravitational shear must be estimated from averaged galaxy images, KSB derives a shear estimate from each individual image and then takes the average. Since the two operations do not commute, KSB gives biased results. (2) KSB implicitly assumes that galaxy ellipticities are small, while weak gravitational lensing assures only that the change in ellipticity due to the shear is small. (3) KSB does not invert the convolution with the point-spread function, but gives an approximate PSF correction which - even for a circular PSF - holds only in the limit of circular sources. The effects of assumptions (2) and (3) partially counter-act in a way dependent on the width of the weight function and of the PSF. We quantitatively demonstrate the biases due to all assumptions, extend the KSB approach consistently to third order in the shear and ellipticity and show that this extension lowers the biases substantially. The issue of proper PSF deconvolution will be addressed in a forthcoming paper.
description: 12 pages, 10 figures, MNRAS submitted
Detection of optical coronal emission from 10^6 K gas in the core of the Centaurus cluster
Creators: name: Canning, R. E. A.
name: Fabian, A. C.
name: Johnstone, R. M.
name: Sanders, J. S.
name: Crawford, C. S.
name: Hatch, N. A.
name: Ferland, G. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a detection (3.5x10^37 \pm 5.6x10^36 ergps) of the optical coronal emission line [Fe X]6374 and upper limits of four other coronal lines using high resolution VIMOS spectra centred on NGC 4696, the brightest cluster galaxy in the Centaurus cluster. Emission from these lines is indicative of gas at temperatures between 1 and 5 million K so traces the interstellar gas in NGC 4696. The rate of cooling derived from the upper limits is consistent with the cooling rate from X-ray observations (~10 solar masses per year) however we detect twice the luminosity expected for [Fe X]6374 emission, at 1 million K, our lowest temperature probe. We suggest this emission is due to the gas being heated rather than cooling out of the intracluster medium. We detect no coronal lines from [Ca XV], which are expected from the 5 million K gas seen near the centre in X-rays with Chandra. Calcium is however likely to be depleted from the gas phase onto dust grains in the central regions of NGC 4696.
description: 11 pages, 13 figures, 2 tables, accepted for publication in MNRAS
Additional file 1 of Low red/far-red ratio as a signal promotes carbon assimilation of soybean seedlings by increasing the photosynthetic capacity
Creators: name: Yang, Feng
name: Liu, Qinlin
name: Cheng, Yajiao
name: Feng, Lingyang
name: Wu, Xiaoling
name: Fan, Yuanfang
name: Raza, Muhammad Ali
name: Wang, Xiaochun
name: Yong, Taiwen
name: Liu, Weiguo
name: Liu, Jiang
name: Du, Junbo
name: Shu, Kai
name: Yang, Wenyu
Publisher: name: figshare
Year: 2020
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Light response curves of net photosynthetic rate (A), light saturation point (B), and quantum yield of PSII (C) of soybean leaves under different treatments. N, N + Fr, L + Fr, and L denote normal light (normal PAR and normal R/Fr ratio), normal light plus far-red light (normal PAR and low R/Fr ratio), low light plus far-red light (low PAR and low R/Fr ratio), and low light (low PAR and normal R/Fr ratio), respectively. Pmax and LSP represent the maximum photosynthetic rate and the light saturation point. Data are expressed as the means ± SD of triplicates. Means followed by different letters are significantly different at P = 0.05.
A brief social history of astrobiology in Ibero-america
Creators: name: Lemarchand, Guillermo A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Popular Physics (physics.pop-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The work is divided into three sections: the first one describes the historical evolution of the main arguments presented about the plurality of inhabited worlds, from the presocratics to the birth of modern science. The second section analyzes the race to define the search for life beyond Earth as a scientific activity under a specific name. Finally, the third part presents a brief description of the social history of science that allowed the early development of astrobiology in Iberoamerica.
description: In Spanish, 30 pages, 15 figures, UNESCO, ICTP, TWAS, Second Iberoamerican School on Astrobiology, September 2009, Montevideo, Uruguay
Stochastic Processes, Slaves and Supersymmetry
Creators: name: Drummond, I. T.
name: Horgan, R. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We extend the work of Tanase-Nicola and Kurchan on the structure of diffusion processes and the associated supersymmetry algebra by examining the responses of a simple statistical system to external disturbances of various kinds. We consider both the stochastic differential equations (SDEs) for the process and the associated diffusion equation. The influence of the disturbances can be understood by augmenting the original SDE with an equation for {\it slave variables}. The evolution of the slave variables describes the behaviour of line elements carried along in the stochastic flow. These line elements together with the associated surface and volume elements constructed from them provide the basis of the supersymmetry properties of the theory. For ease of visualisation, and in order to emphasise a helpful electromagnetic analogy, we work in three dimensions. The results are all generalisable to higher dimensions and can be specialised to one and two dimensions. The electromagnetic analogy is a useful starting point for calculating asymptotic results at low temperature that can be compared with direct numerical evaluations. We also examine the problems that arise in a direct numerical simulation of the stochastic equation together with the slave equations. We pay special attention to the dependence of the slave variable statistics on temperature. We identify in specific models the critical temperature below which the slave variable distribution ceases to have a variance and consider the effect on estimates of susceptibilities.
description: Latex source, 43 pages, 5 figures and 4 tables
The ACS LCID project IV: detection of the RGB bump in isolated galaxies of the Local Group
Creators: name: Monelli, M.
name: Cassisi, S.
name: Bernard, E. J.
name: Hidalgo, S. L
name: Aparicio, A.
name: Gallart, C.
name: Skillman, E. D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the detection and analysis of the red giant branch luminosity function bump in a sample of isolated dwarf galaxies in the Local Group. We have designed a new analysis approach comparing the observed color-magnitude diagrams with theoretical best-fit color-magnitude diagrams derived from precise estimates of the star formation histories of each galaxy. This analysis is based on studying the difference between the V-magnitude of the RGB bump and the horizontal branch at the level of the RR Lyrae instability strip (Delta_vhbb) and we discuss here a technique for reliably measuring this quantity in complex stellar systems. By using this approach, we find that the difference between the observed and predicted values of Delta_vhbb is +0.13 +/- 0.14 mag. This is smaller, by about a factor of two, than the well-known discrepancy between theory and observation at low metallicity commonly derived for Galactic globular clusters. This result is confirmed by a comparison between the adopted theoretical framework and empirical estimates of the Delta_vhbb parameter for both a large database of Galactic globular clusters and for four other dSph galaxies for which this estimate is available in the literature. We also investigate the strength of the red giant branch bump feature (R_bump), and find very good agreement between the observed and theoretically predicted R_bump values. This agreement supports the reliability of the evolutionary lifetimes predicted by theoretical models of the evolution of low-mass stars.
description: Accepted for publication on ApJ