cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Experimental investigation of cavitation induced air release
Creators: name: Kowalski, Karoline
name: Pollak, Stefan
name: Hussong, Jeanette
Publisher: name: EDP Sciences
Year: 2017

description: Variations in cross-sectional areas may lead to pressure drops below a critical value, such that cavitation and air release are provoked in hydraulic systems. Due to a relatively slow dissolution of gas bubbles, the performance of hydraulic systems will be affected on long time scales by the gas phase. Therefore predictions of air production rates are desirable to describe the system characteristics. Existing investigations on generic geometries such as micro-orifice flows show an outgassing process due to hydrodynamic cavitation which takes place on time scales far shorter than diffusion processes. The aim of the present investigation is to find a correlation between global, hydrodynamic flow characteristics and cavitation induced undissolved gas fractions generated behind generic flow constrictions such as an orifice or venturi tube. Experimental investigations are realised in a cavitation channel that enables an independent adjustment of the pressure level upstream and downstream of the orifice. Released air fractions are determined by means of shadowgraphy imaging. First results indicate that an increased cavitation activity leads to a rapid increase in undissolved gas volume only in the choking regime. The frequency distribution of generated gas bubble size seems to depend only indirectly on the cavitation intensity driven by an increase of downstream coalescence events due to a more densely populated bubbly flow.
Visuelle Materialien zu Penčo Slavejkov
Creators: name: Schmidt, Henrike
Publisher: name: Humboldt-Universität zu Berlin
Year: 2019
Subjects: subject: 491 Ostindoeuropäische und keltische Sprachen

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Comment on `Mathematical structure of the three-dimensional (3D) Ising model'
Creators: name: Perk, Jacques H. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The review paper by Zhang Zhi-Dong contains many errors and is based on several earlier works that are equally wrong.
description: 12 pages. To be published as Chin. Phys. B Vol. 22, No. 8 (2013) 087101
The Local News Data Hub: Championing data journalism and equity, one story at a time
Creators: name: Penrose, Carly
name: Schnurr, Breanna
name: Lindgren, April
name: Manuel, Kevin
name: Blanchett, Nicole
Publisher: name: Zenodo
Year: 2023

description: The Local News Data Hub at Toronto Metropolitan University supports local journalism at a time when many newsrooms lack the capacity to produce data-informed stories. Once the editorial team identifies data sets that can be used to generate stories for multiple places, student reporters produce a story template that is customized with relevant data for different communities. This allows us to supply newsrooms with free data-driven stories, support/collaborate with journalists/newsrooms working on data projects, and employ/train student journalists. Data Hub stories, which are distributed by The Canadian Press wire service and published on Hub’s website, have used scientific projections for stories on the local impact of climate change and analyzed internet speed-tests to investigate internet service quality in rural areas. In each case, more than 20 news organizations published one or more stories.

 Our current projects focus on (i) income inequality in Canada and (ii) the country’s aging communities.

 i) Using data from the Statistics Canada 2021 Census, we looked at income inequality using the Gini coefficient for after-tax income across Canada. The stories highlight the cities/towns in census metropolitan areas that have the greatest income inequality and investigate its consequences.

 ii) Using Statistics Canada data, we identified 100 census subdivisions with a population greater than 10,000 where at least 25% of the population is 65 or older. Our stories focus on the dozen or so places with high proportions of older people - places such as Parksville, B.C. (45%), Cape Breton, N.S (26%) and Elliot Lake, Ont. (41%) - and ask how prepared they are for the gray tide washing over them.

 The Data Hub combines data with reporting on human experience to produce stories that point to inequities and advance social justice while also supporting local newsrooms.
Formal Method for the Retrospective Specification of the Functionality of Existing Software Systems
Creators: name: Halmay, Edit
Publisher: name: London South Bank University
Year: 1989

description: The dissertation proposes an unusual but reasonable alternative for the interpretation of programs. Pursuant to this the text of a program denotes a finite set of disjoint relations called the ‘functionality of that program. The relations so associated with the program perfectly represent the different ways in which the program can participate in the realization of the functional specification of the incorporating software system. The accurate definition of the functionality of a program amounts to the functional specification which the program complies with in reality. The pursuance of this subject resulted in a new formal semantics called functional semantics for programming languages. The work on a functional semantics adopted those techniques which have been applied in the formalization of programming language semantics. Yet the functional approach differs qualitatively from the classical ones Since it involves a necessary concern for the pragmatics of the target language. As demonstrated in the dissertation, the operational part of the text of a program is ambiguous in view of the functionality of that program since the externally observable behaviour of two programs of identical operational part may differ considerably. The formal treatment of ambiguity has required a necessary departure from the classical semantic ideas. Within the functional approach, the declaration part of the text of a program has a peculiar significance. The declarations are interpreted as giving positive indication of a situation which is set up by the other programs of the incorporating software system. The meaning of the operational part of the program is resolved in this situation, and it is identical with the functionality of the complete program. The program-functionalities are expressed formally in a constructive sublanguage of classical first order logic in the form of a finite set of inductive definitions. Given that the applied sublanguage of first order logic is universal in view of computability, the meaning function of functional semantics translates, indeed, a program into a_ functionally equivalent logic program The work has a number of practical implications. These include the reasoning about the inherent structure of a sequence of program statements or the maximal parallel implementation of a program. The techniques resulted from the work seem to have some significance beyond programming languages.
MgB2 nonlinear properties investigated under localized high rf magnetic field excitation-report 2
Creators: name: Tai, Tamin
name: Ghamsari, B. G.
name: Tan, T.
name: Zhuang, C. G.
name: Xi, X. X.
name: Anlage, Steven M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences
subject: http://link.aps.org/doi/10.1103/PhysRevSTAB.15.122002

description: The high transition temperature and low surface resistance of MgB2 attracts interest in its potential application in superconducting radio frequency accelerating cavities. However, compared to traditional Nb cavities, the viability of MgB2 at high rf fields is still open to question. Our approach is to study the nonlinear electrodynamics of the material under localized rf magnetic fields. Because of the presence of the small superconducting gap in the $π$ band, the nonlinear response of MgB2 at low temperature is potentially complicated compared to a single-gap s-wave superconductor such as Nb. Understanding the mechanisms of nonlinearity coming from the two-band structure of MgB2, as well as extrinsic sources of nonlinearity, is an urgent requirement. A localized and strong rf magnetic field, created by a magnetic write head, is integrated into our nonlinear-Meissner-effect scanning microwave microscope [Tamin Tai, X. X. Xi, C. G. Zhuang, D. I. Mircea, and S. M. Anlage, IEEE Trans. Appl. Supercond. 21, 2615 (2011)]. MgB2 films with thickness 50 nm, fabricated by a hybrid physical-chemical vapor deposition technique on dielectric substrates, are measured at a fixed location and show a strongly temperature-dependent third harmonic response. We propose that several possible mechanisms are responsible for this nonlinear response.
description: 8 pages, 10 figures. arXiv admin note: text overlap with arXiv:1202.4950
Period-luminosity relations in evolved red giants explained by solar-like oscillations
Creators: name: Mosser, B.
name: Dziembowski, W. A.
name: Belkacem, K.
name: Goupil, M. J.
name: Michel, E.
name: Samadi, R.
name: Soszynski, I.
name: Vrard, M.
name: Elsworth, E.
name: Hekker, S.
name: Mathur, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Solar-like oscillations in red giants have been investigated with CoRoT and Kepler, while pulsations in more evolved M giants have been studied with ground-based microlensing surveys. After 3.1 years of observation with Kepler, it is now possible to make a link between these different observations of semi-regular variables. We aim to identify period-luminosity sequences in evolved red giants identified as semi-regular variables. Then, we investigate the consequences of the comparison of ground-based and space-borne observations. We have first measured global oscillation parameters of evolved red giants observed with Kepler with the envelope autocorrelation function method. We then used an extended form of the universal red giant oscillation pattern, extrapolated to very low frequency, to fully identify their oscillations. From the link between red giant oscillations observed by Kepler and period-luminosity sequences, we have identified these relations in evolved red giants as radial and non-radial solar-like oscillations. We were able to expand scaling relations at very low frequency. This helped us to identify the different sequences of period-luminosity relations, and allowed us to propose a calibration of the K magnitude with the observed frequency large separation. Interpreting period-luminosity relations in red giants in terms of solar-like oscillations allows us to investigate, with a firm physical basis, the time series obtained from ground-based microlensing surveys. This can be done with an analytical expression that describes the low-frequency oscillation spectra. The different behavior of oscillations at low frequency, with frequency separations scaling only approximately with the square root of the mean stellar density, can be used to address precisely the physics of the semi-regular variables.
description: Accepted in A&A
Handling of research data when writing a PhD dissertation. Hildesheim University Library.
Creators: name: Strauch, Annette
Publisher: name: Zenodo
Year: 2020
Subjects: eScience
RDM
Research Data Management
Handling of Data
Research Data Management for graduates
Libraries
University Libraries

description: Once collected in the context of the doctoral thesis, data are processed and reused, and here new tasks arise in the context of research data management (RDM).
 The doctoral students are responsible for their own data and the management of data.
 The University Library of Hildesheim supports the doctoral students in all areas of RDM as well as other members of the university.
The complex singularity of a Stokes wave
Creators: name: Dyachenko, S. A.
name: Lushnikov, P. M.
name: Korotkevich, A. O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Two-dimensional potential flow of the ideal incompressible fluid with free surface and infinite depth can be described by a conformal map of the fluid domain into the complex lower half-plane. Stokes wave is the fully nonlinear gravity wave propagating with the constant velocity. The increase of the scaled wave height $H/λ$ from the linear limit $H/λ=0$ to the critical value $H_{max}/λ$ marks the transition from the limit of almost linear wave to a strongly nonlinear limiting Stokes wave. Here $H$ is the wave height and $λ$ is the wavelength. We simulated fully nonlinear Euler equations, reformulated in terms of conformal variables, to find Stokes waves for different wave heights. Analyzing spectra of these solutions we found in conformal variables, at each Stokes wave height, the distance $v_c$ from the lowest singularity in the upper half-plane to the real line which corresponds to the fluid free surface. We also identified that this singularity is the square-root branch point. The limiting Stokes wave emerges as the singularity reaches the fluid surface. From the analysis of data for $v_c\to 0$ we suggest a new power law scaling $v_c\propto (H_{max}-H)^{3/2}$ as well as new estimate $H_{max}/λ\simeq 0.1410633$.
description: (5 pages, 4 figures, submitted to JETP Letters)
The Nature of the Controversy over Time-Symmetric Quantum Counterfactuals
Creators: name: Kastner, Ruth E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: It is proposed that the recent controversy over "time-symmetric quantum counterfactuals" (TSQCs), based on the Aharonov-Bergmann-Lebowitz Rule for measurements of pre- and post-selected systems, can be clarified by taking TSQCs to be counterfactuals with a specific type of compound antecedent. In that case, inconsistency proofs such as that of Sharp and Shanks (1993) are not applicable, and the main issue becomes not whether such statements are true, but whether they are nontrivial. The latter question is addressed and answered in the negative. Thus it is concluded that TSQCs, understood as counterfactuals with a compound antecedent, are true but only trivially so, and provide no new contingent information about specific quantum systems (except in special cases already identified in the literature).
description: 2003 paper relevant to recent claims concerning pre- and post-selected systems that appear to be based on a generally invalid counterfactual usage of the ABL Rule. The rule does not in general apply to measurements not actually made on a given system between pre- and post-selection. Thus the rule cannot be used to support claims such as a given system having mutually exclusive properties A and B
title: Combined Differential Interferometry and Long-range μPIV measurements of a temperature driven boundary layer flow
Creators: name: Kordel, S.
name: Nowak, T.
name: Skoda, R.
name: Hussong, Jeanette
Publisher: name: IOP Publishing
Year: 2016

description: In the present study Differential Interferometry and Long-range μPIV are successfully combined for a benchmark experiment of an accelerating temperature driven boundary layer flow. Spatial resolutions of 405 pm for the interference and 101 pm for the μPIV measurements could be achieved. The results of the combined measurements are compared with results of numerical simulations. Temperature and velocity profiles are compared with theoretical values and a relation between Nusselt number and Grashof number could be worked out.
Towards Agri-KITTI: a 4D Dataset for Phenotyping and Simultaneous Localization and Mapping in Agricultural Applications
Creators: name: Polvara, Riccardo
name: Molina, Sergi
name: Tsiolis, Konstantinos
name: Papadimitriou, Alexios
name: Mariolis, Ioannis
name: Giakoumis, Dimitrios
name: Tzovaras, Dimitrios
name: Cielniak, Grzegorz
name: Hanheide, Marc
Publisher: name: Zenodo
Year: 2022

description: Work focused on deploying an autonomous robot in a vineyard at specific time intervals and to record sensor data: - Long-term robust deployment of the robot in the wild navigating on a toplofical map. - Building Agri-KITTI, a long-term database of robot sensor data spanning across various seasons. - Adopting the database as benchmark for SLAM algorithms in agricultural environments.
Photoexcitation of graphene with twisted light
Creators: name: Farías, M. B.
name: Quinteiro, G. F.
name: Tamborenea, P. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study theoretically the interaction of twisted light with graphene. The light-matter interaction matrix elements between the tight-binding states of electrons in graphene are determined near the Dirac points. We examine the dynamics of the photoexcitation process by posing the equations of motion of the density matrix and working up to second order in the field. The time evolution of the angular momentum of the photoexcited electrons and their associated photocurrents are examined in order to elucidate the mechanisms of angular momentum transfer. We find that the transfer of spin and orbital angular momentum from light to the electrons is more akin here to the case of intraband than of interband transitions in semiconductors, due to the fact that the two relevant energy bands of graphene originate from the same atomic orbitals.
description: 18 pages, 4 figures
Generating Classes of 3D Virtual Mandibles for AR-Based Medical Simulation
Creators: name: Hippalgaonkar, Neha R.
name: Sider, Alexa D.
name: Hamza-Lup, Felix G.
name: Santhanam, Anand P.
name: Jaganathan, Bala
name: Imielinska, Celina Z.
name: Rolland, Jannick P.
Publisher: name: Columbia University
Year: 2008
Subjects: subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Biomedical engineering
subject: Diagnostic imaging

description: Simulation and modeling represent promising tools for several application domains from engineering to forensic science and medicine. Advances in 3D imaging technology convey paradigms such as Augmented and Mixed Reality (AR/MR) inside promising simulation tools for the training industry. Motivated by the requirement for superimposing anatomically correct 3D models on a Human Patient Simulator (HPS) and visualizing them in an AR environment, the purpose of this research effort is to derive method for scaling a source human mandible to a target human mandible. Results show that, given a distance between two same landmarks on two different mandibles, a relative scaling factor may be computed. Using this scaling factor, results show that a 3D virtual mandible model can be made morphometrically equivalent to a real target-specific mandible within a 1.30 millimeter average error bound. The virtual mandible may be further used as a reference target for registering other anatomical ! models, such as the lungs, on the HPS. Such registration will be made possible by physical constraints among the mandible and the spinal column in the horizontal normal rest position.
Cohomological obstructions in locally variational field theories
Creators: name: Francaviglia, M.
name: Palese, M.
name: Winterroth, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 58A20, 58E30, 46M18

description: We study cohomological obstructions to the existence of global conserved quantities. In particular, we show that, if a given local variational problem is supposed to admit global solutions, certain cohomology classes cannot appear as obstructions. Vice versa, we obtain a new type of cohomological obstruction to the existence of global solutions for a variational problem.
description: 9 pages, presented at the XXI Int. Conf. on Integrable Systems and Quantum Symmetries, ISQS-21, Prague, June 12-16 2013
A Comparison of Wearable Heart Rate Sensors for HRV Biofeedback in the Wild: An Ethnographic Study
Creators: name: Umair, Muhammad
name: Chalabianloo, Niaz
name: Sas, Corina
name: Ersoy, Cem
Publisher: name: Zenodo
Year: 2020

description: Biofeedback has been consistently used to manage stress and anxiety in clinical and non-clinical settings. Existing research on the use of biosignals to provide sensory feedback has been mostly limited to laboratory settings. In this study, we performed an autoethnographic study to analyze the heart rate variability (HRV) data recorded by two wearable biosignal monitors, the Polar H10 heart rate monitor chest strap and Empatica E4 wristband. Data acquisition was conducted during the daily activities of two researchers in real-life settings. Data recorded during the activities and the effects of movement artifacts of each subject were compared qualitatively against each other for HRV stress management
TRE's sound great – but how do they REALLY work?
Creators: name: Sanderson, John
name: Scott, James
Publisher: name: Zenodo
Year: 2023

description: Remote access via Trusted Research Environments, to highly detailed, and closely controlled data in a ‘data lab’, is a booming industry. On a seemingly weekly basis, in the UK alone, there seem to be new TREs emerging and recent years have seen a plethora of reviews looking to set standards for the safe use of the most sensitive data. Principles are being defined, frameworks outlined, recommendations made.

 Since 2011 the Secure Data Access Professionals group (SDAP - https://securedatagroup.org/) has been bringing together the hard working practitioners who can give an insight into the workings ‘under the hood’ and how the 5-safes are operationalised in reality.

 In this presentation we’ll share practical experiences and worked examples of service delivery, with stories from people who do the job on the ground. From the nuts and bolts of managing researchers through the project lifecycle; through recruiting and developing new staff and managing broader service development; to looking forward at the emerging challenges and how to keep TRE provision current and responsive for the next generation of researchers, we’ll cover all the practicalities of running a Trusted Research Environment.

 If you’re already running, or thinking of setting up, a TRE we’ll provide insight on how to deal with the most common day-to-day challenges, sharing the practices we’ve developed collectively across the SDAP network over the last decade. We’ll also introduce some of the valuable resources produced by the network, including the SDAP SDC Handbook and the SDAP competency framework.
Advanced Signal Processing Techniqes to Study Normal and Epileptic EEG
Creators: name: Dash, Debadatta
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: EEG monitoring has an important milestone provide valuable information of those candidates who suffer from epilepsy.In this paper human normal and epileptic Electroencephalogram signals are analyzed with popular and efficient signal processing techniques like Fourier and Wavelet transform. The delta, theta, alpha, beta and gamma sub bands of EEG are obtained and studied for detection of seizure and epilepsy. The extracted feature is then applied to ANN for classification of the EEG signals.
ELECTRONIC WASTE MANAGEMENT AND RECYCLING - POSSIBILITIES IN OMAN
Creators: name: AL-Badi, Fatema Saif Sultan
name: Aaisha Salim Saif Al-Jahwari
name: Aaisha Salim Abdullah Al-Khawaldi
name: Dr. C. Prasanna Ranjith
Publisher: name: Zenodo
Year: 2022

description: Technical development over years left a lot of electronic waste (mobile phones, computers, laptops, etc.), which has become one of the biggest problems faced by Oman as well as other countries in world. The research aims to analyze the impact of the accumulation or disposal of electronic waste in unsafe ways on humans and the environment around them. Also analyze what are the reason behind rapid increase in amount of this type of waste. The study also proposes to find safe alternative solutions to manage and get rid of e-wastes with minimal effects by recycling it and allocating a place to collect and buy electronic wastes at affordable cost from people and then, sell it to specialized factories to manage and recycle e-waste outside the country.
Twist Accumulation and Topology Structure of a Solar Magnetic Flux Rope
Creators: name: Guo, Y.
name: Ding, M. D.
name: Cheng, X.
name: Zhao, J.
name: Pariat, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: To study the build up of a magnetic flux rope before a major flare and coronal mass ejection (CME), we compute the magnetic helicity injection, twist accumulation, and the topology structure of the three dimensional magnetic field, which is derived by the nonlinear force-free field model. The Extreme-ultraviolet Imaging Telescope on board the Solar and Heliospheric Observatory observed a series of confined flares without any CME before a major flare with a CME at 23:02 UT on 2005 January 15 in active region NOAA 10720. We derive the vector velocity at eight time points from 18:27 UT to 22:20 UT with the differential affine velocity estimator for vector magnetic fields, which were observed by the Digital Vector Magnetograph at Big Bear Solar Observatory. The injected magnetic helicity is computed with the vector magnetic and velocity fields. The helicity injection rate was (-16.47 \pm 3.52) \times 10^{40} Mx^2/hr. We find that only about 1.8% of the injected magnetic helicity became finally the internal helicity of the magnetic flux rope, whose twist increasing rate was -0.18 \pm 0.08 Turns/hr. The quasi-separatrix layers (QSLs) of the three dimensional magnetic field are computed by evaluating the squashing degree, Q. We find that the flux rope was wrapped by QSLs with large Q values, where the magnetic reconnection induced by the continuously injected magnetic helicity further produced the confined flares. We suggest that the flux rope was built up and heated by the magnetic reconnection in the QSLs.
description: 32 pages, 9 figures, accepted for publication in ApJ
Bipartite concurrence and localized coherence
Creators: name: Yu, Chang-shui
name: Song, He-shan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on a proposed coherence measure, we show that the local coherence of a bipartite quantum pure state (coherence of its reduced density matrix) is exactly the same as the minimal average co- herence with all potential pure-state realizations under consideration. In particular, it is shown that bipartite concurrence of pure states just captures the maximal difference between local coherence and the average coherence of one subsystem induced by local operations on the other subsystem with the assistance of classical communications, which provides an alternative operational meaning for bipartite concurrence of pure states. The relation between concurrence and the proposed coherence measure can also be extended to bipartite mixed states.
description: 6 pages, 0 figures
UAV-assisted topological mapping for AGV navigation in vineyards
Creators: name: Molina, Sergi
name: Cielniak, Grzegorz
name: Hanheide, Marc
Publisher: name: Zenodo
Year: 2022

description: Topological maps have proven to be an effective representation to be used for outdoor robot navigation. These typically consist of a set of nodes that represent physical locations of the environment and a set of edges representing the robot’s ability to move between these locations. They allow planning to be more efficient and to easily define different robot navigation behaviours depending on the location. In the literature, the topological maps are sometimes manually created in an 2d occupancy map previously built by a robot, but this is not very practical or scalable when it has to be done in a 50ha vineyard with hundreds of rows. Other works focus on the vine rows classification using mainly Color Vegetation indices, however this assumes there is a green canopy which is not always the case depending on the time of the year. Focusing only on the rows also leaves other non-traversable structures such as fences, buildings and poles unmapped. To overcome the aforementioned limitations, we propose a pipeline to use UAV imagery as an input to create a topological map of the vineyard where an AGV has to be deployed.
Structure-Function Relationships in the Human Visual System Using DTI, fMRI and Visual Field Testing: Pre- and Post-Operative Assessments in Patients with Anterior Visual Pathway Compression
Creators: name: Rosiene, J.
name: Liu, Xin
name: D'Ambrosio, Anthony Louis
name: Hirsch, Joy
name: Bruce, Jeffrey N.
name: Ferrera, J.
name: Imielinska, Celina Z.
Publisher: name: Columbia University
Year: 2006
Subjects: subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Diagnostic imaging
subject: Neurosciences
subject: FOS: Clinical medicine

description: The recently developed magnetic resonance technique of diffusion tensor imaging (DTI), is used clinically to trace the structure of white fiber tracts in the human brain. This novel imaging technique that derives microstructural and physiological features of tissues has many potential immediate practical applications. The focus of this paper is to improve our understanding of the relationships between brain structure and function, using pre- and post-operative assessment in patients with anterior visual pathway compression.
Could Jean-Dominique Cassini see the famous division in Saturn's rings?
Creators: name: Lozi, Julien
name: Reess, Jean-Michel
name: Semery, Alain
name: Lhomé, Emilie
name: Jacquinod, Sophie
name: Combes, Michel
name: Bernardi, Pernelle
name: Andretta, Rémi
name: Motisi, Maxime
name: Bobis, Laurence
name: Kaftan, Emilie
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Nowadays, astronomers want to observe gaps in exozodiacal disks to confirm the presence of exoplanets, or even make actual images of these companions. Four hundred and fifty years ago, Jean-Dominique Cassini did a similar study on a closer object: Saturn. After joining the newly created Observatoire de Paris in 1671, he discovered 4 of Saturn's satellites (Iapetus, Rhea, Tethys and Dione), and also the gap in its rings. He made these discoveries observing through the best optics at the time, made in Italy by famous opticians like Giuseppe Campani or Eustachio Divini. But was he really able to observe this black line in Saturn's rings? That is what a team of optical scientists from Observatoire de Paris - LESIA with the help of Onera and Institut d'Optique tried to find out, analyzing the lenses used by Cassini, and still preserved in the collection of the observatory. The main difficulty was that even if the lenses have diameters between 84 and 239 mm, the focal lengths are between 6 and 50 m, more than the focal lengths of the primary mirrors of future ELTs. The analysis shows that the lenses have an exceptionally good quality, with a wavefront error of approximately 50 nm rms and 200 nm peak-to-valley, leading to Strehl ratios higher than 0.8. Taking into account the chromaticity of the glass, the wavefront quality and atmospheric turbulence, reconstructions of his observations tend to show that he was actually able to see the division named after him.
description: 11 pages, 14 figures, proceedings of the SPIE conference Optics+Photonics, San Diego 2013
Awareness of Socially Responsible Investment In Rural Investors with Special Reference to Puthur Grama Panchayath, Kerala
Creators: name: Antony, Anjani
Publisher: name: Zenodo
Year: 2022
Subjects: Socially responsible investment, Socially responsible investing products, Price of SR products

description: Abstract Investment has become the crucial element of human life to secure their future for financially independent, even though we say that nowadays people follows consumerism more than savings and investment. There are many ways to invest your money. Here I’m studying that whether rural people are aware about socially responsible investment? Everyone can do investment if they have money. But this study focus the awareness level of rural people regarding the investment which are socially responsible. Financial industry is a consumer leaded area nowadays. Plenty of investment opportunities are available from different sources. Nowadays its become a trend to select the products which are eco-friendly, organics, Green products, etc, Every products has a competitors which are also a socially concerned product along with its basic nature. This trend has also effected financial products also. That’s why I have selected this topic for my study.
Automatic Correction of the 3D Orientation of the Brain Imagery
Creators: name: Liu, Xin
name: Imielinska, Celina Z.
name: Connolly Jr., E. Sander
name: D'Ambrosio, Anthony
Publisher: name: Columbia University
Year: 2006
Subjects: Diagnostic imaging
Brain--Imaging
Image processing--Digital techniques

description: Classification of human brain pathologies can be guided by the estimation of the departure of 3D internal structures from the normal bilateral symmetry. However symmetry based analysis can 't be precisely carried out when the 3D brain orientation is misaligned, a common occurrence in clinical practice. In this paper, a technique to automatically identify the symmetry plane and correct the 3D orientation of volumetric brain images in a cost effective way is developed. The algorithm seeks the best sampling strategies to realign 3D volumetric representation of the brain within scanner coordinate system. The inertia matrix is computed on the sampled brain, and the principle axes are derived from the eigen vectors of the inertia matrix. The technique is demonstrated on MR and CT brain images and the detected symmetry plane that is orthogonal to the principle vectors is provided. A spatial affine transform is applied to rotate the 3D brain images and align them within the coordinate system of the scanner. The corrected brain volume is re-sliced such that each planar image represents the brain at the same axial level.
Nonprofit revenue diversification and organizational performance
Creators: name: Lin, Weiwei
Publisher: name: No Publisher Supplied
Year: 2010

description: Examining nonprofit revenue diversification is important not only in understanding nonprofit financial management dynamics but also in informing nonprofitfinancial sustainability. This study draws on nonprofit financial management theories to propose three research questions, and develops and empirically tests an integrated model that investigates how contextual factors – organizational structure and capacity,managerial experience, fund development effort and investment, and operating environment – affect nonprofit revenue diversification and financial sustainability. Questionnaires were administered to executive directors of 1,115 New Jersey human services and community improvement organizations. Using data from 501 responding organizations, this study found certain organizational and environmentalcharacteristics have a significant influence on nonprofit revenue diversification. As expected, some capacity, management, investment and environment measures have a positive impact on funding variety, but fewer measures have a positive effect on revenue balance. Multiple regression analyses reveal that most of the hypotheses regarding predictors of financial sustainability are not confirmed which suggests that the research model does not include other factors that significantly impact nonprofit financial sustainability. Major findings of the study include: (a) organizational structure and capacity, such as employee size, years of operation, board involvement, and internal development,are positively related to nonprofit revenue diversification, particularly funding variety; (b) managerial factors, including management’s attitude toward revenue diversification, management’s influence on fund development strategies, and recent operational cutbacks, have significant impact on funding variety, but less so on revenue balance; (c) using designated fund development staff and developing good relationship with outside stakeholders enhance revenue diversification; and (d) revenue diversification does nothelp organizations maintain financially sustainable. Although these findings are only suggestive, this study is a significant step forward in the development of a theory of nonprofit financial performance including the analysis of revenue diversification which will lead to a better understanding of a number of topics that have been understudied and thus not well understood.
Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence
Creators: name: Mininni, Pablo
name: Dmitruk, Pablo
name: Odier, Philippe
name: Pinton, Jean-François
name: Plihon, Nicolas
name: Verhille, Gautier
name: Volk, Romain
name: Bourgoin, Mickael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We analyze time series stemming from experiments and direct numerical simulations of hydrodynamic and magnetohydrodynamic turbulence. Simulations are done in periodic boxes, but with a volumetric forcing chosen to mimic the geometry of the flow in the experiments, the von Kármán swirling flow between two counter-rotating impellers. Parameters in the simulations are chosen to (within computational limitations) allow comparisons between the experiments and the numerical results. Conducting fluids are considered in all cases. Two different configurations are considered: a case with a weak externally imposed magnetic field, and a case with self-sustained magnetic fields. Evidence of long-term memory and $1/f$ noise is observed in experiments and simulations, in the case with weak magnetic field associated with the hydrodynamic behavior of the shear layer in the von Kármán flow, and in the dynamo case associated with slow magnetohydrodynamic behavior of the large scale magnetic field.
description: 10 pages, 9 figures
title: Analysis of the cavitating flow induced by an ultrasonic horn – Experimental investigation on the influence of actuation phase, amplitude and geometrical boundary conditions
Creators: name: Müller, Saskia
name: Fischper, Maurice
name: Mottyll, Stephan
name: Skoda, Romuald
name: Hussong, Jeanette
Publisher: name: EDP Sciences
Year: 2014

description: Till today, factors influencing the formation and collapse of densely distributed, interacting cavitation bubbles are only qualitatively understood. The aim of the present study is to investigate experimentally the influence of selected boundary conditions on the number and size distribution of cavitation bubbles created by an ultrasonic horn (sonotrode). Cavitation bubble clouds below the sonotrode were recorded by means of phase-locked shadowgraphy imaging. The time integrated number of cavitation bubbles was found to decrease exponentially with growing bubble radius. The number of bubbles was increased with growing actuation amplitude and gap width between the sonotrode tip and an opposing solid wall. Furthermore, it could be shown that the number of cavitation bubbles depends on the actuation phase. Future investigations will focus on establishing a statistical relation between the number and size distribution of cavitation bubbles in the near wall region and the resulting cavitation erosion on solid surfaces.
Classification of Ordered Type Soliton Metric Lie Algebras by a Computational Approach
Creators: name: Kadioglu, Hulya
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: Primary: 53C25, Secondary: 53C30, 22E25, 22F30

description: In this study, we classify some soliton nilpotent Lie algebras and possible candidates in dimension 8 and 9 up to isomorphy. We focus on 1 < 2 < ::: < n type of derivations where n is the dimension of the Lie algebras. We present algorithms to generate possible algebra structures.
description: 14 pages
Collection and Evaluation of a Long-Term 4D Agri-Robotic Dataset
Creators: name: Polvara, Riccardo
name: Molina, Sergi
name: Hroob, Ibrahim
name: Cielniak, Grzegorz
name: Hanheide, Marc
Publisher: name: Zenodo
Year: 2022

description: Long-term autonomy is one of the most demanded capabilities looked into a robot. The possibility to perform the same task over and over on a long temporal horizon, offering a high standard of reproducibility and robustness, is appealing. Long-term autonomy can play a crucial role in the adoption of robotics systems for precision agriculture, for example in assisting humans in monitoring and harvesting crops in a large orchard. With this scope in mind, we report an ongoing effort in the long-term deployment of an autonomous mobile robot in a vineyard for data collection across multiple months. The main aim is to collect data from the same area at different points in time so to be able to analyse the impact of the environmental changes in the mapping and localisation tasks. In this work, we present a map-based localisation study taking 4 data sessions. We identify expected failures when the pre-built map visually differs from the environment’s current appearance and we anticipate LTS-Net, a solution pointed at extracting stable temporal features for improving long-term 4D localisation results.
Thermal and Non-thermal X-Rays from the Galactic Supernova Remnant G348.5+0.1
Creators: name: Yamauchi, Shigeo
name: Minami, Sari
name: Ota, Naomi
name: Koyama, Katsuji
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on Suzaku results of the two distinct regions in the Galactic supernova remnant G348.5+0.1: extended thermal X-rays ("soft diffuse") at the northeast region and non-thermal X-rays (CXOU J171419.8-383023) at the northwest region. The X-ray spectrum of the soft diffuse is fitted with neither an ionization equilibrium nor a non-equilibrium (ionizing) plasma model, leaving saw-teeth residuals in the 1.5-3 keV energy band. The residual structures can be produced when free electrons are recombined to the K-shells of highly ionized Mg and Si ions. In fact, the X-ray spectrum is nicely fitted with a recombination-dominant plasma model. We propose a scenario that the plasma in nearly full ionized state at high temperature quickly changed to a recombining phase due to selective cooling of electrons to a lower temperature of ~0.5 keV. The spectrum of CXOU J171419.8-383023 is well explained by a simple power-law model with a photon index of 1.9, nearly equal to the typical value of pulsar wind nebulae. Since the distance is estimated to be the same as that of the soft diffuse, we infer that both the soft diffuse and CXOU J171419.8-383023 are associated with the same object, SNR G348.5+0.1.
description: Accepted for publication in PASJ
Data lifecycle and (meta)data checklist
Creators: name: Widyastuti, Anna
Publisher: name: Zenodo
Year: 2020
Subjects: FAIR, DMP, Data lifecycle, metadata, checklist

description: Data are being recognized as a first-class research object. Therefore, secondary use of data is becoming a natural part of the research process. Research data can only be reusable if they are accompanied by appropriate data and metadata documentation, ensuring the accuracy, completeness, and usefulness of the research object. A data management plan (DMP) is the best way to plan and manage research data throughout the data lifecycle. The different stages within the data lifecycle comprise the specific descriptions of data and metadata. The (meta)data checklist provides basic guidelines one could follow to make research data findable, accessible, interoperable, and reusable (FAIR) both for human and machine readability.
THE IMPORTANCE OF SPOKEN GRAMMAR IN THE ENGLISH LANGUAGE CLASSROOM
Creators: name: Abduhakimova, Gulnoza
Publisher: name: Zenodo
Year: 2023

description: Developing grammar in spontaneous and prepared speaking process may seem to be challenging in a language classroom. The main obstacle for the language acquirer is the difference between the grammatical features of unplanned conversation and standard written English.  The present article outlines specific features of spoken language and shows the importance of teaching grammar for communicative classes where grammar is usually underrated.
Universal chiral conductivities for low temperature holographic superfluids
Creators: name: Amado, Irene
name: Lisker, Nir
name: Yarom, Amos
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We argue that the chiral conductivities of generic s-wave holographic superfluids, whose broken U(1) symmetry is anomalous, exhibit universal behavior at low temperatures. The universal behavior we argue for is independent of the details of the bulk action and on the emergent geometry deep in the bulk interior at low temperatures. Our results are contrasted against general expectations based on an analysis of the entropy current in superfluids.
description: 14 pages, 2 figures
Staff augmentation for a leading utility provider
Creators: name: Globaldev
Publisher: name: Zenodo
Year: 2023

description: Staff augmentation for a leading utility providerBudget Thuis and Globaldev Group have been working together for almost ten years. When we started, the request was to use our extensive talent database to recruit and interview an additional team member to strengthen the client's existing team. We've been steadily striving to expand the current team since 2014, and we now have 35+ team members. Budget Thuis initially entered the Dutch energy market as an economical provider of gas and electricity.However, they revolutionized the Dutch market, with their "Everything under one roof" concept, demonstrating that combining multiple services could be both cost-effective and beneficial for consumers. At present, the company offers three service package types: Budget All-in-1 (internet, TV, and calling), Budget Energy (electricity and gas), and Budget Mobile (SIM). The user gets an extra monthly savings when they bundle these packages. The company's effective use of technological advancements, in collaboration with our services at Globaldev, is also evident by the reliability and speed of their services.Globaldev not only assisted Budget Thuis in assembling a global development team, but we also had experience managing a group that was distributed all over the world. In order to solve the issues and make sure their staff is effective, engaged, and productive, we included HR best practices. Along with forming a team, we were responsible for establishing inter-team communication and enhancing leadership abilities so that team leads could encourage, motivate, and direct others. Currently, there are four different nationalities in the Budget Thuis development team. They are a committed team focused on streaming operations through Budget Thuis digital projects, despite being transnational and multilingual. Learn more about this case study.