cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structural integrity of the deposit-substrate interface of Wire + Arc Additively Manufactured steel components
Creators: name: Motte, Robin
name: De Waele, Wim
Publisher: name: Zenodo
Year: 2022

description: Remanufacturing of damaged parts can contribute to a more sustainable economy by reducing energy and materials consumption. For the dimensional restoration and structural repair of steel components, Wire + Arc Additive Manufacturing (WAAM) can be applied. Due to the high cyclical heat input during the WAAM process, a gradient in microstructure and mechanical properties will arise at the deposit-substrate interface. Methodologies are under development to investigate this heterogeneity in mechanical properties through sub-size quasi-static tensile tests and Compact Tension (CT) fatigue testing with extensive instrumentation. During tensile testing of specimens extracted parallel to the deposit-substrate interface, a periodic deformation pattern is observed in the strain field obtained through Digital Image Correlation (DIC). Surface height measurements of the failed specimens show that this pattern is related to the waviness of the interface due to the deposition of adjacent weld beads. CT specimens have been extracted with notches at different locations relative to the interface in order to investigate the fatigue crack growth rate, as well as possible crack path deviation.
Non-empirical Study of Superconductivity in Alkali-doped Fullerides Based on Density Functional Theory for Superconductors
Creators: name: Akashi, Ryosuke
name: Arita, Ryotaro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We apply the density functional theory for superconductors (SCDFT) based on the local-density approximation (LDA) to alkali-doped fullerides A3C60 with the face-centered cubic structure. We evaluate the superconducting transition temperature (Tc) from first principles considering energy dependence of electron-phonon coupling, the mass renormalization, and the retardation effect. The calculated Tc=7.5, 9.0 and 15.7 K for A=K, Rb, Cs are approximately 60 % smaller than the experimentally observed values. Our results strongly suggest necessity to go beyond the framework of the Migdal-Eliashberg theory based on the LDA.
description: 5 pages, 4 figures
title: ÐÑÐ½Ð¾Ð²Ñ Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ ÑÐµÑ Ð½Ð¸ÐºÐ¸. ÐÐµÑÐ¾Ð´Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¸ Ð¿Ð¾ ÐºÑÑÑÐ¾Ð²Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
title: Fundamentals of computing. Methodological guidelines for course paper
Creators: name: ÐÐ½ÑÐ¾Ð½Ð¾Ð², ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
name: ÐÐ°Ð¼ÑÑÐ¾Ð²Ð°, ÐÐ»ÑÐ³Ð°
name: Ð¢Ð°ÑÐ°ÑÐ¾Ð², ÐÐ»ÐµÐ³
name: Ð¤Ð¸Ð»Ð¸Ð¿Ð¿Ð¾Ð², ÐÐ»ÐµÐºÑÐµÐ¹
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: ÐÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ ÑÐµÑ Ð½Ð¸ÐºÐ°

description: Ð¡Ð¾Ð¾ÑÐ²ÐµÑÑÑÐ²ÑÐµÑ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾Ð¼Ñ ÑÑÐ°Ð½Ð´Ð°ÑÑÑ Ð¡Ð£ÐÐ¡ Ð¿Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ 09.03.01 Â«ÐÐ½ÑÐ¾ÑÐ¼Ð°ÑÐ¸ÐºÐ° Ð¸ Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ ÑÐµÑÐ½Ð¸ÐºÐ°Â». ÐÐ¾ÑÐ²ÑÑÐµÐ½Ð¾ Ð¾ÑÐ½Ð¾Ð²Ð°Ð¼ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð´Ð²Ð¾Ð¸ÑÐ½ÑÑ ÑÐ¸ÑÐµÐ» Ð² Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ ÑÐµÑÐ½Ð¸ÐºÐµ Ð¸ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿Ð°Ð¼ ÑÐ°Ð±Ð¾ÑÑ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÑ Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½ÑÑ ÑÐ·Ð»Ð¾Ð². Ð Ð¿Ð¾ÑÐ¾Ð±Ð¸Ð¸ ÑÐ¸ÑÑÐµÐ¼Ð½Ð¾ Ð¸Ð·Ð»Ð°Ð³Ð°ÑÑÑÑ Ð±Ð°Ð·Ð¾Ð²ÑÐµ Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾Ð´ÑÐ¾Ð´Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÑÐ¼Ð¼Ð°ÑÐ¾ÑÐ¾Ð², ÐºÐ¾Ð¼Ð¿Ð°ÑÐ°ÑÐ¾ÑÐ¾Ð² Ð¸ ÑÐ¼Ð½Ð¾Ð¶Ð¸ÑÐµÐ»ÐµÐ¹. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ðµ ÑÐ°Ð·Ð´ÐµÐ»Ð¾Ð² ÑÐ°Ð±Ð¾ÑÑ Ð² ÑÑÐµÐ´Ðµ Quartus Prime Ð´Ð°ÐµÑ Ð½Ð°Ð²ÑÐºÐ¸ Ð¿Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ñ Ð°ÑÐ¸ÑÐ¼ÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¸ Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ñ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ ÑÐµÑÐ½Ð¸ÐºÐ¸. ÐÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ¾Ð², Ð°ÑÐ¿Ð¸ÑÐ°Ð½ÑÐ¾Ð² Ð¸ ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ¾Ð², Ð·Ð°Ð½Ð¸Ð¼Ð°ÑÑÐ¸ÑÑÑ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¾Ð¹ ÑÐ¸ÑÑÐ¾Ð²Ð¾Ð¹ Ð°Ð¿Ð¿Ð°ÑÐ°ÑÑÑÑ.
description: The training manual corresponds to the self-imposed educational standard in the major 09.03.01 âComputer Science and Engineeringâ. It is dedicated to the fundamentals of binary numbers representation in computing and principles of operation of basic computational nodes. The manual describes the basic practical approaches to implementing adders, comparators, and multipliers in a systematic way. Completing the sections in the Quartus Prime environment provides the skills of building arithmetic and logical devices of computing technology. It is intended for Bachelorâs program students, postgraduate students, and specialists involved in the development of digital hardware.
Remote Homology Detection in Proteins Using Graphical Models
Creators: name: Daniels, Noah M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Given the amino acid sequence of a protein, researchers often infer its structure and function by finding homologous, or evolutionarily-related, proteins of known structure and function. Since structure is typically more conserved than sequence over long evolutionary distances, recognizing remote protein homologs from their sequence poses a challenge. We first consider all proteins of known three-dimensional structure, and explore how they cluster according to different levels of homology. An automatic computational method reasonably approximates a human-curated hierarchical organization of proteins according to their degree of homology. Next, we return to homology prediction, based only on the one-dimensional amino acid sequence of a protein. Menke, Berger, and Cowen proposed a Markov random field model to predict remote homology for beta-structural proteins, but their formulation was computationally intractable on many beta-strand topologies. We show two different approaches to approximate this random field, both of which make it computationally tractable, for the first time, on all protein folds. One method simplifies the random field itself, while the other retains the full random field, but approximates the solution through stochastic search. Both methods achieve improvements over the state of the art in remote homology detection for beta-structural protein folds.
description: Doctoral dissertation
The Generalized DMPK equation revisited: A systematic derivation
Creators: name: Douglas, Andrew
name: Markos, Peter
name: Muttalib, K. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Generalized Dorokov-Mello-Pereyra-Kumar (DMPK) equation has recently been used to obtain a family of very broad and highly asymmetric conductance distributions for three dimensional disordered conductors. However, there are two major criticisms of the derivation of the Generalized DMPK equation: (1) certain eigenvector correlations were neglected based on qualitative arguments that can not be valid for all disorder, and (2) the repulsion between two closely spaced eigenvalues were not rigorously governed by symmetry considerations. In this work we show that it is possible to address both criticisms by including the eigenvalue and eigenvector correlations in a systematic and controlled way. It turns out that the added correlations determine the evolution of the Jacobian, without affecting the evaluation of the conductance distributions. They also guarantee the symmetry requirements. In addition, we obtain an exact relationship between the eigenvectors and the Lyapunov exponents leading to a sum rule for the latter at all disorder.
Interacting spin-droplets and magnetic properties of a low-density two-dimensional electron gas
Creators: name: Stadnik, Yevgeny V.
name: Sushkov, Oleg P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We argue that the magnetic susceptibility data, Refs. 1-3, for the low-density two-dimensional (2D) silicon-based electron gas indicate that magnetically active electrons are localised in spin-droplets. The droplets exist in both the insulating and metallic phases, and interact ferromagnetically, forming an effective 2D Heisenberg ferromagnet. Comparing the data with known analytical and numerical results for a 2D Heisenberg ferromagnet, we determine that JS^2 \approx 0.6K, where S is the spin of the droplet and J is the ferromagnetic exchange constant between droplets. We further argue that most likely S=1 with four electrons occupying each droplet on average. We discuss the dependence of the magnetic susceptibility and the specific heat on the external magnetic field, which follows from the model, and hence we suggest further experimental tests of the model.
Auswirkungen des Einsatzes von Social Networking Technologien auf Unternehmen: Eine multiperspektivische Betrachtung
Creators: name: Jacob, Axel
Publisher: name: Universität Osnabrück
Year: 2022
Subjects: subject: Social Media
subject: Gamification
subject: Innovationsadoption
subject: Nachhaltige Mode
subject: 330 - Wirtschaft
subject: 004 - Informatik

description: Gegenstand der kumulativen Dissertation ist eine Untersuchung zu den Auswirkungen des Einsatzes von Technologien wie Social Media und Gamification, die in dieser Arbeit unter dem Begriff Social Network Technologies (SNT) zusammengefasst werden, auf die anwendenden Unternehmen. Hierzu werden innerhalb einer multiperspektivischen Betrachtung unter der Verwendung von etablierten Forschungsmethoden zuerst Forschungsbedarfe im Hinblick auf den Einsatz von SNT in Unternehmen ermittelt. Im weiteren Verlauf werden das Adoptionsverhalten von (Kleinst-)Unternehmen, konkrete Einsatzmöglichkeiten in spezifischen Kontexten und die Konsequenzen des Einsatzes von SNT auf die sozialen Strukturen der Mikro- und Makroebene der Unternehmen sowie den Prozess der Innovationsadoption untersucht. Weiterhin werden Implikationen zur Gestaltung von SNT zum Einsatz in Unternehmen dargelegt.
The importance of nonlinear fluid response in joint density-functional theory studies of battery systems
Creators: name: Gunceler, Deniz
name: Letchworth-Weaver, Kendra
name: Sundararaman, Ravishankar
name: Schwarz, Kathleen A
name: Arias, T A
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Delivering the full benefits of first principles calculations to battery materials demands the development of accurate and computationally-efficient electronic structure methods that incorporate the effects of the electrolyte environment and electrode potential. Realistic electrochemical interfaces containing polar surfaces are beyond the regime of validity of existing continuum solvation theories developed for molecules, due to the presence of significantly stronger electric fields. We present an ab initio theory of the nonlinear dielectric and ionic response of solvent environments within the framework of joint density-functional theory, with precisely the same optimizable parameters as conventional polarizable continuum models. We demonstrate that the resulting nonlinear theory agrees with the standard linear models for organic molecules and metallic surfaces under typical operating conditions. However, we find that the saturation effects in the rotational response of polar solvent molecules, inherent to our nonlinear theory, are crucial for a qualitatively correct description of the ionic surfaces typical of the solid electrolyte interface.
description: 20 pages, 7 figures
Conformal infinity in Robinson-Trautman spacetimes with cosmological constant
Creators: name: Svitek, Otakar
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 83C20, 83C30, 83C40

description: In past, the future asymptotic behavior (with respect to initial data on null hypersurface) of Robinson-Trautman spacetime was examined and its past horizon characterized. Therefore, only the investigation of conformal infinity is missing from the picture. We would like to present some initial results concerning conformal infinity when negative cosmological constant is present motivated by the AdS/CFT correspondence.
description: 4 pages, 2 figures, for ERE2011 Proceedings
Approach to Equilibrium of a Body Colliding Specularly and Diffusely with a Sea of Particles
Creators: name: Chen, Xuwen
name: Strauss, Walter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider a rigid body acted upon by two forces, a constant force and the collective force of interaction with a continuum of particles. We assume that some of the particles that collide with the body reflect elastically (specularly), while others reflect probabilistically with some probablility distribution K. We find that the rate of approach of the body to equilibrium is O(t^{-3-p}) in three dimensions where p can take any value from 0 to 2, depending on K.
Student wellness in online Social Work higher education: Technology-enhanced activities, programs, and services
Creators: name: Marquart, Matthea S.
name: Nair, Murali Dharan
Publisher: name: Columbia University
Year: 2018
Subjects: Well-being
Web-based instruction
Distance education students
Classroom environment
Social work education
Education, Higher

description: Our evolving society at present includes technology-enhanced online education, workplaces, and human service providers. In this online environment, students, coworkers, and clients who do not see each other in person may be at risk of feeling a loss of community or a loss of support around holistic wellness. Schools working in the field of online higher education, including online social work education programs, have created diverse approaches to supporting online student wellness. These approaches may also be helpful for human service providers with virtual clients, organizations with remote employees, or consultants who lead virtual trainings.
Online student wellness: Examples of technology-enhanced activities, programs, and services that can promote wellness
Creators: name: Marquart, Matthea S.
Publisher: name: Columbia University
Year: 2018
Subjects: Well-being
Web-based instruction
Distance education students
Social work education
Classroom environment--Social aspects

description: Online students may be at risk of feeling a loss of community or a loss of support around holistic wellness, but there are options for online programs to address this by offering technology-enhanced activities, programs, and services. This poster will describe the wellness needs of online students and examples of wellness-related programs from online higher educational institutions. Members of the field of online social work education in particular have the potential to create supports for online student wellness.
Demonstration of AEP boosting by wind farm control at a commercial wind farm
Creators: name: Schreiber, Johannes
name: Coimbra, David
name: Bottasso, Carlo L.
Publisher: name: Zenodo
Year: 2023
Subjects: wind farm control
wake steering
wind energy

description: Energiekontor AG is a pioneering developer and operator of wind parks with technical innovation as one of its core values. ventodyne GmbH is a young dynamic company specialized in boosting the productivity of wind parks by wind farm control (WFC). Energiekontor and ventodyne have teamed up to bring WFC to the Withernwick wind farm, an onshore park with 13 closely-spaced wind turbines. In this document we report on the results of a six-month test campaign, where two of the Withernwick turbines were equipped with a wake-steering park controller. Toggling the park controller on and off provides clear and quantitative evidence of the effectiveness of this solution. The results also confirm the accuracy with which ventodyne estimated the gain in annual energy production (AEP) prior to field deployment.
ANTARES, a scanning photoemission microscopy beamline at SOLEIL
Creators: name: Avila, Jose
name: Razado, Ivy
name: Lorcy, Stehane
name: Lagarde, Bruno
name: Giorgetta, Jean-Luc
name: Polack, François
name: Asensio, Maria C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: As one of the latest beamline built at the SOLEIL synchrotron source, ANTARES beamline offers a spectroscopic non-destructive nano-probe to study advanced materials. This innovative scanning photoemission microscopy combines linear and angle sweeps to perform precise electronic band structure determination by Nano Angle Resolved Photoelectron Spectroscopy (nanoARPES) and chemical imaging by core level detection. The beamline integrates effectively insertion devices and a high transmission beamline optics. This photon source has been combined with an advanced microscope, which has precise sample handling abilities. Moreover, it is fully compatible with a high resolution R4000 Scienta hemispherical analyzer and a set of Fresnel Zone Plates (FZP) able to focalize the beam spot up to a few tenths of nanometers, depending on the spatial resolution of the selected FZP. We present here the main conceptual design of the beamline and endstation, together with some of the firsts commissioning results.
BOSHLANG'ICH SINFLARDA TABIIY FANLARDAN SINFDAN TASHQARI ISHLARNI TASHKIL ETISHDA VIRTUAL VOSITALARDAN FOYDALANISH
Creators: name: G'aniyeva, Gulhayo
Publisher: name: Zenodo
Year: 2023

description: Bugungi kunda dunyo miqyosida tabiiy fanlarni multimedia vositalari asosida o'qitishni takomillashtirish, xalqaro baholash dasturlari darsda o'quvchilarni tabiiy-ilmiy savodxonligini oshirish sohasida keng ko'lamli islohotlarni amalga oshirishga bo'lgan ehtiyoj yanada kuchaymoqda. BMTning ta'lim, fan va madaniyat masalalari bo'yicha "Ma'rifiy, ma'naviy va madaniy mazmundagi materiallarni olib kirish" to'g'risidagi bitimida dunyo miqyosida ta'lim oluvchilarni o'qitish sifatiga nisbatan keng sharoitlar yaratish, ta'lim jarayoniga zamonaviy innovatsion texnologiyalarni joriy etish bo'yicha ilmiy-tadqiqot ishlari olib borish alohida ahamiyatga ega. Bu borada samaradorlikka erishish hamda multimedia vositalarining rolini va ta'sirini oshirish, mavjud muammolarni konseptual o'rganish va tahlil qilish mavzuning dolzarbligini belgilaydi.
Nonparametric Forecasts of the CMB Angular Power Spectra for the Planck Mission
Creators: name: Aghamousa, Amir
name: Arjunwadkar, Mihir
name: Souradeep, Tarun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Planck mission, designed for making measurements of the cosmic microwave background (CMB) radiation with unprecedented accuracy and angular resolution, is expected to release its first data set in the near future. For the first time in the CMB history, extensive measurements of the CMB polarization will be made available for the entire sky. Such precise and rich data are expected to contain a great wealth of information about the Universe. The information in the CMB data is conveniently represented in terms of angular power spectra for temperature and polarization. A proper estimation of these CMB power spectra from data is the first step in making inferences about the Universe and, in particular, cosmological parameters that govern the Universe. In this paper, we provide forecasts for the $TT$, $EE$, and $TE$ angular power spectra for the Planck mission. Our forecasts are made using synthetic data based on the best-fit $Λ$CDM model while conforming to the characteristics and parameters of the Planck mission. We have analysed such synthetic data sets using a nonparametric function estimation formalism that is otherwise asymptotically model-independent. Indeed, the power spectra estimated from such synthetic data turn out to be sufficiently close to the corresponding $Λ$CDM spectra. Our analysis further indicates that the three angular power spectra are determined sufficiently well for $2 \le l \lesssim l_{max}$, where $l_{max} = 2500 {($TT$),} 1377 {($EE$), and} 1727 {($TE$)}$ respectively. A signature of reionization is evident in the $EE$ and $TE$ power spectra in the form of a bump at low $l$s ...
Bringing Real Life Into VR Using Videos
Creators: name: Artois, Julie
name: Lambert, Peter
Publisher: name: Zenodo
Year: 2022

description: The multimedia industry is constantly pushing to deliver more and more immersive experiences. Instead of watching a flat screen (e.g. to watch movies, to stream, to teleconference, etc.), technologies like Virtual Reality (VR) allow a user to move around in a virtual world with six degrees-of-freedom. I present a pipeline that captures real-world environments using cameras, reconstructs the scene in 3D, and allows a viewer to walk through the reconstruction in using VR. To achieve real-time rendering in VR (90 frames per second), several trade-offs need to be made between computational performance and visual quality. During the demo, the users will be able to explore multiple environments in VR created through the pipeline. Through these user experiments, the quality of experience of the system at different trade-offs can be measured.
Determination of structure tilting in magnetized plasmas - Time delay estimation in two dimensions
Creators: name: Guszejnov, Dávid
name: Bencze, Attila
name: Zoletnik, Sándor
name: Andreas-Krämer-Flecken
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Time delay estimation (TDE) is a well-known technique to investigate poloidal flows in fusion plasmas. The present work is an extension of the earlier works of A. Bencze and S. Zoletnik 2005 and B. Tál et al. 2011. From the prospective of the comparison of theory and experiment it seem to be important to estimate the statistical properties of the TDE based on solid mathematical groundings. This paper provides analytic derivation of the variance of the TDE using a two-dimensional model for coherent turbulent structures in the plasma edge and also gives an explicit method for determination of the tilt angle of structures. As a demonstration this method is then applied to the results of a quasi-2D Beam Emission Spectroscopy (BES) measurement performed at the TEXTOR tokamak.
description: 8 pages, 10 figures
Fatigue Strength Degradation of Structural Steel in Sea Environment Due to Pitting Corrosion
Creators: name: Elahi, Seyed Ahmad
name: Sofiani, Farid Mehri
name: Chaudhuri, Somsubhro
name: De Waele, WIm
Publisher: name: Zenodo
Year: 2022

description: Steel support structures of offshore wind turbines (jackets and monopiles) undergo both fatigue and corrosion damage, impacting their lifetime. Due to the time‐variant uncertainties associated with environmental and mechanical loads, having reliable models that allow prediction of the degradation due to corrosion and fatigue is necessary to accurately assess the structural integrity and to support decision-making. This work investigates how pitting corrosion, caused by being exposed to the marine environment, affects the fatigue strength of structural steel. A short crack model is used to estimate the minimum required applied load amplitude which causes a growing crack emanating from the bottom of a semi-elliptical pit. The modeling results show the fatigue strength degradation as a function of the exposure time to the corrosive environment. As exposure time increases, it is observed that degradation happens more quickly in the early years followed by a convergence of the fatigue strength to a minimum value. ALso, a parametric study is done to see the effect of the pit size and sharpness of the degradation of the fatigue strength. It illustrates that for a specific pit sharpness by increasing the pit size the fatgiue strength decreases sharply at first and then tends to converge to a specific value which depends on the sharpness of the pit.
Optimizing Cost, Delay, Packet Loss and Network Load in AODV Routing Protocol
Creators: name: Lanjewar, Ashutosh
name: Gupta, Neelesh
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: AODV is Ad-hoc On-Demand Distance Vector.A mobile ad-hoc network is a self-configuring network of mobile devices connected by wireless. MANET does not have any fixed infrastructure. The device in a MANET is free to move in any direction and will form the connection as per the requirement of the network. Due to changing topology maintenance of factors like Packet loss, End to End Delay, Number of hops, delivery ratio and controlling the network load is of great challenge. This paper mainly concentrates on reducing the factors such as cost, End-to-End Delay, Network Load and Packet loss in AODV routing protocol. The NS-2 is used for the simulation purpose.
description: 6 Pages, 7 Figures, Paper is registered with IJCSIS Journal Vol. 11, No. 4, April 2013
Planning interactive online events to engage employees, clients, donors, and community members: Lessons from an award-winning online event series
Creators: name: Cox Awanohara, Mary-Lea
name: Dachos, Natasha
name: Marquart, Matthea S.
Publisher: name: Columbia University
Year: 2018
Subjects: Social work education
Web-based instruction
Social marketing
Special events--Management

description: Online events can engage employees and community members, boost the impact of programs and services, and drive content marketing efforts that support client and donor recruitment and retention. However, webinar quality can vary widely, with many webinars losing audience members quickly due to lack of engagement, particularly because holding the events online means that attendees have a wide variety of built-in competitors for their attention, such as email, social media, work, and entertainment. Thus, disruptive leaders interested in achieving the benefits of online events while avoiding the pitfalls may need to jolt the status quo in order to revamp their organizations’ existing online events or launch innovative new events that meet their goals. This poster shares some tools and strategies that can help with this process. The poster draws on Columbia University School of Social Work’s experience creating an award-winning series of online events. Our online events are highly interactive and create community amongst the hundreds of audience members. In the audience, prospective students ask questions and receive answers from alumni and admissions officers; current students around the country chat with each other and with their instructors; alumni from around the world network around specific issues. Speakers have included current students, faculty, and alumni. The range of event topics have highlighted the School’s expertise and included topics such as “Challenges Facing Psychotherapists in the New Political Climate,” “Veterans and Homelessness,” and “How Legalizing Marijuana Affects Adolescents.” This poster shares the planning process driving our successful online events, the technology and strategies used to engage participants, and how we’ve addressed challenges that have come up during the live events.
Interferometer-controlled soft X-ray scanning photoemission microscope at SOLEIL
Creators: name: Avila, José
name: Razado-Colambo, Ivy
name: Lorcy, Stephane
name: Giorgetta, Jean-Luc
name: Polack, François
name: Asensio, María C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: ANTARES beamline (BL), a new soft X-ray scanning photoemission microscope located at the SOLEIL synchrotron storage ring has been recently designed, built and commissioned. The implemented interferometer control allows the accurate measurement of the transverse position of the Fresnel zone plate (FZP) relative to the sample. An effective sample position feedback has been achieved during experiments in static mode, with a fixed FZP position required to perform nano Angle-Resolved Photoelectron Spectroscopy (Nano-ARPES) measurements. Likewise, long-term stability has been attained for the FZP position relative to the sample during the translation of the FZP when performing typical X-ray absorption experiments around the absorption edges of light elements. Moreover, a fully automatic feedback digital control of the interferometric system provides extremely low orthogonal distortion of the recorded two-dimensional images. The microscope is diffraction limited with the resolution set to several tens of nanometers by the quality of the zone plates. Details on the design of the interferometric system and a brief description of the first commissioning results are presented here.
Nonlinear Schrodinger solitons in massive Yang-Mills theory and partial localization of Dirac matter
Creators: name: Maintas, X. N.
name: Tsagkarakis, C. E.
name: Diakonos, F. K.
name: Frantzeskakis, D. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the classical dynamics of the massive SU(2) Yang-Mills field in the framework of multiple scale perturbation theory. We show analytically that there exists a subset of solutions having the form of a kink soliton, modulated by a plane wave, in a linear subspace transverse to the direction of free propagation. Subsequently, we explore how these solutions affect the dynamics of a Dirac field possessing an SU(2) charge. We find that this class of Yang-Mills configurations, when regarded as an external field, leads to the localization of the fermion along a line in the transverse space. Our analysis reveals a mechanism for trapping SU(2) charged fermions in the presence of an external Yang-Mills field indicating the non-abelian analogue of Landau localization in electrodynamics.
description: 10 pages, 4 figures
Galathea guttata Osawa 2004
Creators: name: Dong, Chao
name: Li, Xinzheng
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Galatheidae
Galathea
Galathea guttata

description: Galathea guttata Osawa, 2004
(Fig. 6)
 Galathea sp. B. — Kato & Okuno 2001: 88, unnumbered fig.
 Galathea guttata Osawa, 2004: 93, fig. 3A, B (type locality: Ryukyu Islands and Izu Islands). — Baba et al. 2008: 69.
 Material examined. South China Sea. MBM069823, 1 male (5.4 mm), St. 6224, 17.75°N, 109°E, CN N219B-177, 54 m, coarse mud, sand and shell, AT, 16 May 1960. Hainan Island: MBM 150114, 1 ovigerous female (4.9 mm), Xincun Harbor, CN 92C-271, 1– 3 m, DC, living coral, 26–27 Mar.1992; MBM 150287, 1 male (4.1 mm), 2 ovigerous females (4.0, 4.3 mm), Yalong Bay, Yezhu Island, 7 m, from living Pocillopora sp., 22 Mar.1992; MBM 150288, 1 male (5.4 mm), Yalong Bay, Yezhu Island, 8 m, dead coral, 27 Mar.1992; MBM 150307, 1 female (3.3 mm), CN 90C–665, Yalong Bay, Yezhu Island, 6–11 m, DC, 25 Nov.1990.
 Distribution. Previously known from Izu Islands, Ryukyu Islands; 2– 40 m. Now also known from South China Sea; 1– 54 m.
 Remarks. The specimens agree well with Osawa’s (2004) descripton and illustrations. This is the first record for the species from the Chinese waters.
description: Published as part of Dong, Chao & Li, Xinzheng, 2010, Reports of Galathea Fabricius, 1793 (Crustacea: Decapoda: Anomura: Galatheidae) from Chinese waters, with descriptions of two new species, pp. 1-28 in Zootaxa 2687 on pages 11-12, DOI: 10.5281/zenodo.199458
Can P2P Networks be Super-Scalable?
Creators: name: Baccelli, François
name: Mathieu, Fabien
name: Norros, Ilkka
name: Varloot, Rémi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We propose a new model for peer-to-peer networking which takes the network bottlenecks into account beyond the access. This model can cope with key features of P2P networking like degree or locality constraints together with the fact that distant peers often have a smaller rate than nearby peers. Using a network model based on rate functions, we give a closed form expression of peers download performance in the system's fluid limit, as well as approximations for the other cases. Our results show the existence of realistic settings for which the average download time is a decreasing function of the load, a phenomenon that we call super-scalability.
description: arXiv admin note: substantial text overlap with arXiv:1108.4129
An Ultraviolet Investigation of Activity on Exoplanet Host Stars
Creators: name: Shkolnik, Evgenya L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the far-UV (FUV) and near-UV (NUV) photometry from the NASA Galaxy Evolution Explorer (GALEX), we searched for evidence of increased stellar activity due to tidal and/or magnetic star-planet interactions (SPI) in the 272 of known FGK planetary hosts observed by GALEX. With the increased sensitivity of GALEX, we are able probe systems with lower activity levels and at larger distances than what has been done to date with X-ray satellites. We compared samples of stars with close-in planets (a < 0.1 AU) to those with far-out planets (a > 0.5 AU) and looked for correlations of excess activity with other system parameters. This statistical investigation found no clear correlations with a, M_p, nor M_p/a, in contrast to some X-ray and Ca II studies. However, there is tentative evidence (at a level of 1.8-σ) that stars with RV-detected close-in planets are more FUV-active than stars with far-out planets, in agreement with several published X-ray and Ca II results. The case is strengthened to a level of significance of 2.3-σ when transit-detected close-in planets are included. This is most likely because the RV-selected sample of stars is significantly less active than the field population of comparable stars, while the transit-selected sample is similarly active. Given the factor of 2-3 scatter in fractional FUV luminosity for a given stellar effective temperature, it is necessary to conduct a time-resolved study of the planet hosts in order to better characterize their UV variability and generate a firmer statistical result.
description: 31 pages. Accepted to ApJ
Galathea inconspicua Henderson 1885
Creators: name: Dong, Chao
name: Li, Xinzheng
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Galatheidae
Galathea
Galathea inconspicua

description: Galathea inconspicua Henderson, 1885
(Fig. 7)
 Galathea inconspicua Henderson, 1885: 408 (type locality: off Banda Island, 659 m); 1888: 122, pl. 12, fig. 2. — Baba 1994: 4, fig. 2; 2005: 244. — Baba et al. 2008: 69.
 Material examined. South China Sea. MBM069806, 2 females (3.0, 2.8 mm), CN K31B; MBM069807, 1 male (4.3 mm), 2 ovigerous females (4.7, 4.8 mm), St. 6145, 18°15'N, 111°E, CN K172B- 11, 158 m, mealy and sandy mud, BT, 14 Jul.1959; MBM069810, 2 males (4.3, 4.7 mm), 4 ovigerous females (4.5–5.8 mm), St. 6080, 19°N, 113°E, CN K67B- 51, 220 m, fine sand, AT, 11 Jul.1959.
 Distribution. Previouely known from Banda Island, Central Queensland; 296– 659 m. Now also known from South China Sea; 158– 220 m.
 Remarks. The specimens agree with the previous descriptions of the species. The present specimens have more numerous transverse ridges on the carapace than the sample from the Central Queensland reported by Baba (1994). This is the first record for the species from Chinese waters.
description: Published as part of Dong, Chao & Li, Xinzheng, 2010, Reports of Galathea Fabricius, 1793 (Crustacea: Decapoda: Anomura: Galatheidae) from Chinese waters, with descriptions of two new species, pp. 1-28 in Zootaxa 2687 on pages 12-13, DOI: 10.5281/zenodo.199458
On the manifold of closed hypersurfaces in R^n
Creators: name: Pruess, Jan
name: Simonett, Gieri
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Several results from differential geometry of hypersurfaces in R^n are derived to form a tool box for the direct mapping method. The latter technique has been widely employed to solve problems with moving interfaces, and to study the asymptotics of the induced semiflows.
description: 21 pages. To appear
Optimization of Spinel Absorber Coatings for CSP Particle Receivers
Creators: name: M. Farchado
name: R. Tordesillas
name: G. San Vicente
name: N. Germán
name: A. Morales
Publisher: name: Zenodo
Year: 2022
Subjects: CSP, particles, thermal storage, Brayton power cycle

description: In order to improve the current commercial plants of concentrating solar power system (CSP), new system designs are being explored within the framework of COMPASsCO2 project to reach high temperatures. Solid particles are potential candidates to be used as receiver in CSP plants to increase their operating temperature (in order of 1000 °C) and efficiency, while can be also used as thermal storage medium. So, the integration of CSP particle systems into a highly efficiency-CO2 Brayton power cycle for electricity production is pursued. Different kinds of particles developed by Saint-Gobain have been coated with new developed coatings in order to ensure good optical properties and study their high temperatures and abrasion resistance. Solar absorptance values as high as 0.98 are obtained by applying 4 layers of porous black copper, manganese and iron spinel, heated at 1000ºC. A system to study abrasion processes by particle-particle collisions was also presented.
Density distributions of outflow driven turbulence
Creators: name: Moraghan, Anthony
name: Kim, Jongsoo
name: Yoon, Suk-Jin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Protostellar jets and outflows are signatures of star formation and promising mechanisms for driving supersonic turbulence in molecular clouds. We quantify outflow-driven turbulence through three-dimensional numerical simulations using an isothermal version of the robust total variation diminishing code. We drive turbulence in real-space using a simplified spherical outflow model, analyse the data through density probability distribution functions (PDF), and investigate the Core Formation Rate per free-fall time (CFR_ff). The real-space turbulence driving method produces a negatively skewed density PDF possessing an enhanced tail on the low-density side. It deviates from the log-normal distributions typically obtained from Fourier-space turbulence driving at low densities, but can provide a good fit at high-densities, particularly in terms of mass weighted rather than volume weighted density PDF. Due to this fact, we suggest that the CFR_ff determined from a Fourier-driven turbulence model could be comparable to that of our particular real-space driving model, which has a ratio of solenoidal to compressional components from the resulting turbulence velocity fields of ~0.6.
description: 5 pages, 3 figures, accepted for publication in MNRASL
Integral field spectroscopy of HII regions in M33
Creators: name: López-Hernández, Jesús
name: Terlevich, Elena
name: Terlevich, Roberto
name: Rosa-González, Daniel
name: Díaz, Ángeles
name: Benito, Rubén García
name: Vílchez, José
name: Hägele, Guillermo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Integral field spectroscopy (IFS) is presented for star forming regions in M33. A central area of 300 x 500 pc^2 and the external HII region IC 132, at a galactocentric distance {\sim} 19arcmin (4.69 kpc) were observed with the Potsdam Multi Aperture Spectrophotometer (PMAS) instrument at the 3.5 m telescope of the Calar Alto Hispano- Alemán observatory (CAHA). The spectral coverage goes from 3600 A to 1μm to include from [OII]λ3727 A to the near infrared lines required for deriving sulphur electron temperature and abundance diagnostics. Local conditions within individual HII regions are presented in the form of emission line fluxes and physical conditions for each spatial resolution element (spaxel) and for segments with similar Hα surface brightness. A clear dichotomy is observed when comparing the central to outer disc HII regions. While the external HII region has higher electron temperature plus larger Hβ equivalent width, size and excitation, the central region has higher extinction and metal content. The dichotomy extends to the BPT diagnostic diagrams that show two orthogonal broad distributions of points. By comparing with pseudo-3D photoionization models we conclude that the bulk observed differences are probably related to a different ionization parameter and metallicity. Wolf-Rayet features are detected in IC 132, and resolved into two concentrations whose integrated spectra were used to estimate the characteristic number of WR stars. No WR features were detected in the central HII regions despite their higher metallicity.
description: 72 pages, 37 figures
Stability of Relative Equilibria in the Planar N-Vortex Problem
Creators: name: Roberts, Gareth E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 70F10, 70H14, 37J25, 37J45, 76B47

description: We study the linear and nonlinear stability of relative equilibria in the planar N-vortex problem, adapting the approach of Moeckel from the corresponding problem in celestial mechanics. After establishing some general theory, a topological approach is taken to show that for the case of positive circulations, a relative equilibrium is linearly stable if and only if it is a nondegenerate minimum of the Hamiltonian restricted to a level surface of the angular impulse (moment of inertia). Using a criterion of Dirichlet's, this implies that any linearly stable relative equilibrium with positive vorticities is also nonlinearly stable. Two symmetric families, the rhombus and the isosceles trapezoid, are analyzed in detail, with stable solutions found in each case.
description: 23 pages, 3 figures
Galathea pilosa De Man 1888
Creators: name: Dong, Chao
name: Li, Xinzheng
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Galatheidae
Galathea
Galathea pilosa

description: Galathea pilosa De Man, 1888
(Fig. 9)
 Galathea pilosa De Man, 1888: 460, pl.19, figs 4, 4a (type locality: Ambon). — Miyake & Baba 1966: 72, figs 11, 12. — Baba 1977: 245. — Kamezaki et al. 1988: 98, with color figure. — Baba et al. 2008: 75.
 Material examined. South China Sea. Nansha Islands: MBM 150210, 1 male (5.3 mm), Dongmenjiao, CN SSFJ 3-13, 1– 3 m, coral reef, 20 May 1990; MBM 150235, 1 female (3.9 mm), Da’aijiao, CN SSFJ 6-36, 1– 3 m, coral, 25 May 1990. Xisha Islands: MBM 150316, 1 ovigerous female (4.7 mm), Beijiao, coral reef, CN 58C-029, 23 Mar.1958.
 Distribution. Previously known from Amami-oshima, Okinawa, Taiwan, Obi Major, Christmas Island, Ambon; intertidal. Now also known from South China Sea; 1– 3 m.
 Remarks. The specimens agree with the previous descriptions of the species with the rostrum being uniquely truncate, as long as broad, and armed with four teeth on each side. In the holotype, the carapace bears six epigastric spines and lacks postcervical spines. In the specimens of Miyake & Baba (1966) two epigastric spines and two postcervical spines are present. In the specimens of Baba (1977), two to four epigastric spines and two postcervical spines are present. The carapaces of our specimens have six epigastric spines and two postcervical spines. This is the first record for the species from the Chinese waters.
description: Published as part of Dong, Chao & Li, Xinzheng, 2010, Reports of Galathea Fabricius, 1793 (Crustacea: Decapoda: Anomura: Galatheidae) from Chinese waters, with descriptions of two new species, pp. 1-28 in Zootaxa 2687 on page 16, DOI: 10.5281/zenodo.199458
Observable induced gravitational waves from an early matter phase
Creators: name: Alabidi, Laila
name: Kohri, Kazunori
name: Sasaki, Misao
name: Sendouda, Yuuiti
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Assuming that inflation is succeeded by a phase of matter domination, which corresponds to a low temperature of reheating $T_r<10^9\rm{GeV}$, we evaluate the spectra of gravitational waves induced in the post-inflationary universe. We work with models of hilltop-inflation with an enhanced primordial scalar spectrum on small scales, which can potentially lead to the formation of primordial black holes. We find that a lower reheat temperature leads to the production of gravitational waves with energy densities within the ranges of both space and earth based gravitational wave detectors.
description: 25 pages, 12 figures, v2 includes minor changes