cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Seeding Osteoblasts onto Osteocytes: An In Vitro 3D Study
Creators: name: Green, Judith
name: Guo, X Edward
Publisher: name: Columbia Undergraduate Science Journal
Year: 2006

description: Understanding the mechanisms by which bone cells communicate is vital in exploring diseases characterized by bone degeneration, namely, osteoporosis. Cell seeding has been used in two dimensional (2D) cell cultures to study how bone cells interact with one another, specifically, to prove the existence of gap junctions between osteocytes and osteoblasts. However, the natural three dimensional (3D) state of bone tissue requires examining it in 3D. Accordingly, the cell seeding procedure was tested on trabecular bone core explants to ascertain whether it is useful in 3D studies as well. When the dye concentrations taken from past 2D experiments were used, Day 1 showed many osteoblasts, but by Day 2 the cells were not visible. The dye concentrations were then doubled to determine if the osteoblasts were still seeded onto the bone cores and viable but not visible, or if they had actually died. With these dye concentrations, the stained osteoblasts were still visible on the second day after seeding, indicating that the cells were seeded and living. According to these results, it is evident that with minor modifications of the 2D procedure, it is possible to seed osteoblasts onto osteocytes in 3D, making this a credible test for the presence of gap junctions in 3D bone tissue.
description: Columbia Undergraduate Science Journal, Vol 1 (2006): Spring 2006
Integrable Boundary Conditions and W-Extended Fusion in the Logarithmic Minimal Models LM(1,p)
Creators: name: Pearce, Paul A.
name: Rasmussen, Jorgen
name: Ruelle, Philippe
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the logarithmic minimal models LM(1,p) as `rational' logarithmic conformal field theories with extended W symmetry. To make contact with the extended picture starting from the lattice, we identify 4p-2 boundary conditions as specific limits of integrable boundary conditions of the underlying Yang-Baxter integrable lattice models. Specifically, we identify 2p integrable boundary conditions to match the 2p known irreducible W-representations. These 2p extended representations naturally decompose into infinite sums of the irreducible Virasoro representations (r,s). A further 2p-2 reducible yet indecomposable W-representations of rank 2 are generated by fusion and these decompose as infinite sums of indecomposable rank-2 Virasoro representations. The fusion rules in the extended picture are deduced from the known fusion rules for the Virasoro representations of LM(1,p) and are found to be in agreement with previous works. The closure of the fusion algebra on a finite number of representations in the extended picture is remarkable confirmation of the consistency of the lattice approach.
description: 15 pages
Additional file 1 of Anatomy and histomorphology of the flexor digitorum profundus enthesis: functional implications for tissue engineering and surgery
Creators: name: Mortimer, Jeremy W.
name: Alsaykhan, Hamad
name: Vadibeler, Subashan
name: Rust, Philippa A.
name: Paxton, Jennifer Z.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology

description: Additional file 1 Fig. S1 FDP Footprint Image Analysis. a) Lower half of stained DP with unstained FDP footprint. Dotted line shows mapped FDP footprint perimeter, full line shows consequent bounding box, processed to create the binary mask footprint image within its bounding box [(b) and (c)]. Footprint surface area is quantified from the area inside the footprint perimeter. b) General footprint measurements. Base width (BW) is the widest measurement (i.e. width of bounding box), and apex width (AW) is the highest point at which the sloping sides turn horizontally towards the midline. Height is calculated as the mean of height at mid-width of the bounding box (H1) and maximum height (H2, i.e. height of bounding box). c) 4 internal angles (apex left, AL; apex right, AR; base left, BL; base right, BR) are calculated as a mean of 2 trapezoids (subscripts 1 and 2). The base of the trapezoids are defined by the perpendicular at the highest point of left or right bounding box intersection (subscript 1, dotted line) or at the lowest point of the footprint (subscript 2, broken line). Apices are positioned the same for both trapezoids. Table S1. Internal Angles (o) of FDP Footprint Trapezoid. Results are presented as Mean (± standard error). Table S2. Angle (o) of Inserting Fibres at Enthesis Distance Measurement Points. Table S3. Angle (o) of Approaching Fibres at Enthesis Distance Measurement Points. Results are presented as Mean (± standard error).
Review of David Levin. 2007. Unsettling Opera: Staging Mozart, Verdi, Wagner, and Zemlinsky. Chicago and London: University of Chicago Press
Creators: name: Casadei, Delia
Publisher: name: Current Musicology
Year: 2009

description: David Levin’s Unsettling Opera: Staging Mozart, Verdi, Wagner, and Zemlinsky is an ambitious book, and one that opens with an unusual insight: namely, that the onstage performance practice of opera in the last twenty years is a field ripe for academic discourse, one that promises to uncover new perspectives on the restricted repertoire of historical musicology. Levin suggests that operatic productions in Europe and the United States have amply paid homage to academic concerns about the production of meaning and other post-modern enthusiasms. Yet academia has not returned the favor, instead preferring studies of historical performance practice that largely ignore contemporary productions. Of course, it is by no means the case that no one cares about these new productions. Levin spends a good part of his preface quoting the Financial Times’s and the New York Times’s dismissals of two provocative productions of Don Carlos and Die Entfuhrung aus dem Serail. Indeed, Levin may even have taken his cue for this book from the sheer volume of critical bile elicited by the work of directors such as Hans Neuenfels or Peter Sellars; he knows full well that a reception marked by anger and rash dismissal is the signpost to an interesting field of inquiry.
description: Current Musicology, No 88 (2009): Current Musicology
Additional file 11 of Genomic adaptations of Campylobacter jejuni to long-term human colonization
Creators: name: Bloomfield, Samuel J.
name: Midwinter, Anne C.
name: Biggs, Patrick J.
name: French, Nigel P.
name: Marshall, Jonathan C.
name: Hayman, David T. S.
name: Carter, Philip E.
name: Mather, Alison E.
name: Fayaz, Ahmed
name: Thornley, Craig
name: Kelly, David J.
name: Benschop, Jackie
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 11. Long-term patients’ gene variation function analysis.
Hyperplane Arrangements and the Bernstein-Gelfand-Gelfand Correspondence
Creators: name: Pradhan, Neeraj B
Publisher: name: Columbia Undergraduate Science Journal
Year: 2006

description: The Chen ranks conjecture has stimulated work that involves ideas from the theory of hyperplane arrangements and homological algebra, namely the Bernstein-Gelfand-Gelfand (BGG) correspondence. The conjecture is an attempt to give a combinatorial formula for the Chen ranks invariants of a hyperplane arrangement. In 2005, Schenck and Suciu proved half of the conjecture. First, we motivate the necessary definitions and explain the connections between the field of hyperplane arrangements and the field of homological algebra with the goal of explaining the Chen ranks conjecture to the reader. The reader is not assumed to have any background in hyperplane arrangements, but some familiarity with homological algebra. SINGULAR routines were used to drastically simplify the calculations for the Chen invariant of an arbitrary hyperplane arrangement. Apart from the Chen invariant, our routine can calculate two other invariants associated to an arrangement with a high degree of efficiency. Thus, it has proven itself to be a very useful tool in studying arrangements. The difficulty with proving the conjecture is that the formulae involved are extremely complicated and difficult to compute by hand. To overcome this, we tried to verify the conjecture through the examination of examples. So far in all the examples we have examined, we have not found any contradictions; rather, we are very optimistic about the validity of the conjecture.
description: Columbia Undergraduate Science Journal, Vol 1 (2006): Spring 2006
Komar integral and Smarr formula for axion-dilaton black holes versus S duality
Creators: name: Mitsios, Dimitrios
name: Ortín, Tomás
name: Pereñíguez, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct the Komar integral for axion-dilaton gravity using Wald's formalism and momentum maps and we use it to derive a Smarr relation for stationary axion-dilaton black holes. While the Wald-Noether 2-form charge is not invariant under SL(2,R) electric-magnetic duality transformations because Wald's formalism does not account for magnetic charges and potentials, the Komar integral constructed with it turns out to be invariant and, in more general theories, it will be fully symplectic invariant. We check the Smarr formula obtained with the most general family of static axion-dilaton black holes.
description: LaTeX file, 19 pages, no figures
Suzaku observation of the metallicity distribution in the intracluster medium of the Fornax cluster
Creators: name: Matsushita, Kyoko
name: Fukazawa, Yasushi
name: Hughes, John P.
name: Kitaguchi, Takao
name: Makishima, Kazuo
name: Nakazawa, Kazuhiro
name: Ohashi, Takaya
name: Ota, Naomi
name: Tamura, Takayuki
name: Tozuka, Miyako
name: Tsuru, Takeshi Go
name: Urata, Yuji
name: Yamasaki, Noriko Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The metallicity distribution in the Fornax cluster was studied with the XIS instrument onboard the Suzaku satellite. K-shell lines of O and Mg were resolved clearly, and the abundances of O, Mg, Si, S and Fe were measured with good accuracy. The region within a 4' radius of NGC 1399 shows approximately solar abundances of Fe, Si and S, while the O/Fe and Mg/Fe abundance ratios are about 0.4--0.5 and 0.7 in solar units. In the outer region spanning radii between 6' and 23', the Fe and Si abundances drop to 0.4--0.5 solar and show no significant gradient within this region. The abundance ratios, O/Fe and Mg/Fe, are consistent with those in the central region. We also measured the Fe abundance around NGC 1404 to be approximately solar, and the O, Ne and Mg abundances to be 0.5--0.7 times the Fe level. The significant relative enhancement of Fe within 130 kpc of NGC 1399 and in NGC 1404 indicates an origin in SN Ia, in contrast to the species O, Ne, and Mg which reflect the stellar metallicity. The mass-to-light ratios for O and Fe within 130 kpc of NGC 1399 are over an order of magnitude lower than those in rich clusters, reflecting the metal enrichment history of this poor cluster.
description: 13 pages, accepted to PASJ
Question-order Effects in the Domains of Language and Marriage
Creators: name: Lindemann, Patricia
name: Johnson, Peta-Kaye
Publisher: name: Columbia Undergraduate Science Journal
Year: 2006

description: The effect of question-order on respondents’ choices is well-studied and well established, but these effects are not always present and are sometimes contradictory. The question of whether prior involvement in an issue alters the question-order effect also exists. We examined the effect of question-order, or context, on the stated values of participants by exploiting the saliency effect through the use of framing questions. Although our results showed some influence of question order, we encountered a ceiling effect. Our ceiling may have been caused by the same factor observed by Rimal and Real (2005): high-involvement mitigates question-order effect. Nevertheless, for those interested in educational campaigns, studying how context influences an individual’s values and preferences is a subject worthy of further pursuit.
description: Columbia Undergraduate Science Journal, Vol 1 (2006): Spring 2006
Toward a more stringent test of gravity with redshift space power spectrum: simultaneous probe of growth and amplitude of large-scale structure
Creators: name: Song, Yong-Seon
name: Zheng, Yi
name: Taruya, Atsushi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Redshift-space distortions (RSD) offers an exciting opportunity to test the gravity on cosmological scales. In the presence of galaxy bias, however, the RSD measurement at large scales, where the linear theory prediction is safely applied, is known to exhibit a degeneracy between the parameters of structure growth f and fluctuation amplitude sigma8, and one can only constrain the parameters in the form of fsigma8. In order to disentangle this degeneracy, in this paper, we go beyond the linear theory, and consider the model of RSD applicable to a weakly nonlinear regime. Based on the Fisher matrix analysis, we show explicitly that the degeneracy of the parameter fsigma8 can be broken, and sigma8 is separately estimated in the presence of galaxy bias. Performing further the Markov chain Monte Carlo analysis, we verify that our model correctly reproduces the fiducial values of fsigma8 and sigma8, with the statistical errors consistent with those estimated from the Fisher matrix analysis. We show that upcoming galaxy survey of the stage-IV class can unambiguously determine sigma8 at the precision down to 10% at higher redshifts even if we restrict the accessible scales to k<0.16h/Mpc
description: 12 pages, 9 figures
Additional file 10 of Genomic adaptations of Campylobacter jejuni to long-term human colonization
Creators: name: Bloomfield, Samuel J.
name: Midwinter, Anne C.
name: Biggs, Patrick J.
name: French, Nigel P.
name: Marshall, Jonathan C.
name: Hayman, David T. S.
name: Carter, Philip E.
name: Mather, Alison E.
name: Fayaz, Ahmed
name: Thornley, Craig
name: Kelly, David J.
name: Benschop, Jackie
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 10. Long-term patients’ pangenome function analysis.
Perspectives on spintronic diodes
Creators: name: Finocchio, Giovanni
name: Tomasello, Riccardo
name: Fang, Bin
name: Giordano, Anna
name: Puliafito, Vito
name: Carpentieri, Mario
name: Zeng, Zhongming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spintronic diodes are emerging as disruptive candidates for impacting several technological applications ranging from the Internet of Things to Artificial Intelligence. In this letter, an overview of the recent achievements on spintronic diodes is briefly presented, underling the major breakthroughs that have led these devices to have the largest sensitivity measured up to date for a diode. For each class of spintronic diodes (passive, active, resonant, non-resonant), we indicate the remaining developments to improve the performances as well as the future directions. We also dedicate the last part of this perspective to new ideas for developing spintronic diodes in multiphysics systems by combining 2-dimensional materials and antiferromagnets.
Solving Elgar’s Enigma
Creators: name: Santa, Charles Richard
name: Santa, Matthew
Publisher: name: Current Musicology
Year: 2010

description: On June 19, 1899, Elgar’s opus 36, Variations on a Theme, was introduced to the public for the first time. It was accompanied by an unusual program note: “It is true that I have sketched for their amusement and mine, the idiosyncrasies of fourteen of my friends, not necessarily musicians; but this is a personal matter, and need not have been mentioned publicly. The Variations should stand simply as a “piece” of music. The Enigma I will not explain-its “dark saying” must be left unguessed, and I warn you that the connexion between the Variations and the Theme is often of the slightest texture; further, through and over the whole set [of variations 1 another and larger theme “goes” but is not played … So the principal Theme never appears, even as in some late dramas-e.g., Maeterlinck’s “L’Intruse” and “Les sept Princesses” -the chief character is never on the stage. (Burley and Carruthers 1972:119)” After this premier Elgar give hints about the piece’s “Enigma;’ but he never gave the solution outright and took the secret to his grave. Since that time scholars, music lovers, and cryptologists have been trying to solve the Enigma. Because the solution has not been discovered in spite of over 108 years of searching, many people have assumed that it would never be found. In fact, some have speculated that there is no solution, and that the promise of an Enigma was Elgar’s rather shrewd way of garnering publicity for the piece. Others have even argued that the larger Enigma was a joke or a hoax; that Elgar never had any Enigma but instead tricked people to search in vain (Rushton 1999:64). Elgar refused to validate any solution offered during his lifetime, and therefore no solution can ever be proven beyond the shadow of a doubt. However, the composer offered a series of hints that provide a rubric for evaluating the plausibility of various solutions.
description: Current Musicology, No 89 (2010): Current Musicology
Study of an intermediate age open cluster IC 1434 using ground-based imaging and Gaia DR2 astrometry
Creators: name: Hendy, Y. H. M.
name: Bisht, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a detailed photometric and kinematical analysis of poorly studied open cluster IC 1434 using CCD VRI, APASS, and Gaia DR2 database for the first time. BY determining the membership probability of stars, we identified the 238 most probable members with a probability higher than 60% by using proper motion and parallax data as taken from the Gaia DR2 catalog. The mean proper motion of the cluster is obtained as emu_x= - 3.89 +/- 0.19 and emu_y= - 3.34 +/- 0.19 mas/yr in both the directions of right ascension and declination. The radial distribution of member stars provides cluster extent as 7.6 arcmin. We have estimated the interstellar reddening (E(B-V)) as 0.34 mag using the transformation equations from literature. We obtained the values of cluster age and distance are 631 +/- 73 Myr and 3.2 +/- 0.1 Kpc.
description: 18 pages, 12 figures, 2 tables, accepted for publication in Revista Mexicana de Astronomia y Astrofisica
Music Smashed to Pieces: The Destructive Logic of Berlioz’s Roméo au tombeau
Creators: name: Rodgers, Stephen
Publisher: name: Current Musicology
Year: 2010

description: Berlioz’s Romeo au tombeau des Capulets, the sixth movement of his symphony Romeo et Juliette, is arguably his most controversial programmatic work and one of the most baffling pieces of program music in the repertoire. When the symphony premiered in 1839, Berlioz’s instrumental setting of the tomb scene from Shakespeare’s play (with David Garrick’s ending, in which Juliet wakes before Romeo dies) was criticized for being incoherent because it had no conventional formal scheme, used avant-garde musical language, and boasted drastic shifts in style and mood. It was also criticized for being too literal because of its blatant musical depictions of dramatic acts, including Romeo’s drink from the vial of poison and Juliet’s suicidal stab. Jules Maurel called the piece a “mistake” and argued that one would need “a stage, scenery, tombs, theatrical half-light, and people speaking and acting” to understand it (Maurel 1839).Modern listeners have been kinder than Berlioz’s contemporaries. Scholars today tend to agree that Romeo au tombeau is not a “mistake” but a meaningful, if difficult, work that deserves to be taken seriously, but there is no consensus about how to make sense of it.
description: Current Musicology, No 89 (2010): Current Musicology
Evolution in the iron abundance of the ICM
Creators: name: Balestra, I.
name: Tozzi, P.
name: Ettori, S.
name: Rosati, P.
name: Borgani, S.
name: Mainieri, V.
name: Norman, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a Chandra analysis of the X-ray spectra of 56 clusters of galaxies at $z>0.3$, which cover a temperature range of $3> kT > 15$ keV. Our analysis is aimed at measuring the iron abundance in the ICM out to the highest redshift probed to date. We find that the emission-weighted iron abundance measured within $(0.15-0.3) R_{vir}$ in clusters below 5 keV is, on average, a factor of $\sim2$ higher than in hotter clusters, following $Z(T)\simeq 0.88 T^{-0.47} Z_\odot$, which confirms the trend seen in local samples. We made use of combined spectral analysis performed over five redshift bins at $0.3> z > 1.3$ to estimate the average emission weighted iron abundance. We find a constant average iron abundance $Z_{Fe}\simeq 0.25 Z_\odot$ as a function of redshift, but only for clusters at $z>0.5$. The emission-weighted iron abundance is significantly higher ($Z_{Fe}\simeq0.4 Z_\odot$) in the redshift range $z\simeq0.3-0.5$, approaching the value measured locally in the inner $0.15 R_{vir}$ radii for a mix of cool-core and non cool-core clusters in the redshift range $0.1
description: 4 pages, 4 figures, to appear in the Proceedings of "The Extreme Universe in the Suzaku Era", Dicember 2006, Kyoto (Japan)
Coverage Analysis for UAV-Assisted Cellular Networks in Rural Areas
Creators: name: Matracia, Maurilio
name: Kishk, Mustafa A.
name: Alouini, Mohamed-Slim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: Despite coverage enhancement in rural areas is one of the main requirements in next generations of wireless networks (i.e., 5G and 6G), the low expected profit prevents telecommunication providers from investing in such sparsely populated areas. Hence, it is required to design and deploy cost efficient alternatives for extending the cellular infrastructure to these regions. A concrete mathematical model that characterizes and clearly captures the aforementioned problem might be a key-enabler for studying the efficiency of any potential solution. Unfortunately, the commonly used mathematical tools that model large scale wireless networks are not designed to capture the unfairness, in terms of cellular coverage, suffered by exurban and rural areas. In big cities, in fact, cellular deployment is essentially capacity driven and thus cellular base station densities are maximum in the town centers and decline when getting far from them. In this paper, a new stochastic geometry-based model is implemented in order to show the coverage spatial variation among urban, suburban, and exurban settlements. Indeed, by implementing inhomogeneous Poisson point processes (PPPs) it is possible to study the performance metrics in a realistic scenario where terrestrial base stations (TBSs) are clustered around the urban center while outer aerial base stations (ABSs) are uniformly distributed outside an urban exclusion zone. Based on this, our simulation results can quantify the improvement, in terms of coverage probability, that even a surprisingly low density of ABSs can bring to peripheral regions depending on the extension of the exclusion zone, enabling us to draw insightful considerations.
Benutzerfreundliche Daten für die Altertumswissenschaften!?
Creators: name: Bruhn, Kai-Christian
Publisher: name: Zenodo
Year: 2019
Subjects: Linked Data
Linked Open Data
LOD
Frictionless Data
Digestible Data

description: Vortrag gehalten auf dem VDB-Fortbildung für Fachreferenten der Altertumswissenschaften in
 Heidelberg am 13.03.2019
Additional file 1 of Co‑cultivation of the anaerobic fungus Caecomyces churrovis with Methanobacterium bryantii enhances transcription of carbohydrate binding modules, dockerins, and pyruvate formate lyases on specific substrates
Creators: name: Brown, Jennifer L.
name: Swift, Candice L.
name: Mondo, Stephen J.
name: Seppala, Susanna
name: Salamov, Asaf
name: Singan, Vasanth
name: Henrissat, Bernard
name: Drula, Elodie
name: Henske, John K.
name: Lee, Samantha
name: LaButti, Kurt
name: He, Guifen
name: Yan, Mi
name: Barry, Kerrie
name: Grigoriev, Igor V.
name: O’Malley, Michelle A.
Publisher: name: figshare
Year: 2021
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Additional file 1. Additional tables and figures.
Abundance analysis of 5 early-type stars in the young open cluster IC2391
Creators: name: Stuetz, Ch.
name: Bagnulo, S.
name: Jehin, E.
name: Ledoux, C.
name: Cabanac, R.
name: Melo, C.
name: Smoker, J. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is unclear whether chemically peculiar stars of the upper main sequence represent a class completely distinct from normal A-type stars, or whether there exists a continuous transition from the normal to the most peculiar late F- to early B-type stars. A systematic abundance analysis of open cluster early-type stars would help to relate the observed differences of the chemical abundances of the photospheres to other stellar characteristics, without being concerned by possible different original chemical composition. Furthermore, if a continuous transition region from the very peculiar to the so called normal A-F stars exists, it should be possible to detect objects with mild peculiarities. As a first step of a larger project, an abundance analysis of 5 F-A type stars in the young cluster IC2391 was performed using high resolution spectra obtained with the UVES instrument of the ESO VLT. Our targets seem to follow a general abundance pattern: close to solar abundance of the light elements and iron peak elements, heavy elements are slightly overabundant with respect to the sun, similar to what was found in previous studies of normal field A-type stars of the galactic plane. We detected a weakly chemically peculiar star, HD74044. Its element pattern contains characteristics of CP1 as well as CP2 stars, enhanced abundances of iron peak elements and also higher abundances of Sc, Y, Ba and Ce. We did not detect a magnetic field in this star (detection limit was 2kG). We also studied the star SHJM2, proposed as a pre-main sequence object in previous works. Using spectroscopy we found a high surface gravity, which suggests that the star is very close to the ZAMS.
description: 7 pages + online material
Dynamics and control of a flexible tethered system with offset
Creators: name: Pidgeon, Robert W.
Publisher: name: University of British Columbia
Year: 2010

description: A mathematical model of a platform based flexible tethered satellite system in an arbitrary orbit, undergoing planar motion, is obtained using the Lagrangian procedure. The governing equations of motion account for the platform and tether pitch, longtitu-dinal tether oscillations, offset of the tether attachment point as well as deployment and retrieval of the tether. A numerical parametric study of the highly nonlinear, nonautonomous and coupled equations of motion gives considerable insight into the system dynamics useful in its design. Of particular interest are the interactions involving orbital eccentricity, system librations, tether flexibility and offset, retrieval maneuvers and initial disturbances. Results show that the offset strongly couples tether and platform dynamics, and the resulting responses show high frequency modulations corresponding to the longtitudinal tether oscillations. The system was found to be unstable during retrieval. The Linear Quadratic Regulator based offset control strategy, in conjunction with the platform mounted momentum gyros, is proposed to alleviate the situation. Results show that a strategy involving independent parallel control of low and high frequency responses can damp rather severe disturbances in a fraction of an orbit.
Security testing using JUnit and Perl scripts
Creators: name: Harty, Julian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In this paper, I describe a recent practical experience where JUnit was used for testing security bugs in addition to functional bugs. Perl scripts were also used during the exploration phase. The application being tested was mature, but insecure.
description: 3 pages
Dynamics of dwarf-spheroidals and the dark matter halo of the Galaxy
Creators: name: Cowsik, R.
name: Ratnam, Charu
name: Bhattacharjee, Pijushpani
name: Majumdar, Subhabrata
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Based on the observed paucity of the dwarf spheroidal (dSph) satellites of the Milky Way at small Galactocentric distances, we put forward the hypothesis that subsequent to the formation of the Milky Way and its satellites, those dSphs that had orbits with small perigalacticons were tidally disrupted, leaving behind a population that now has a relatively larger value of its average perigalacticon to apogalacticon ratio and consequently a larger value of its r.m.s. transverse to radial velocities ratio compared to their values at the time of formation of the dSphs. We analyze the implications of this hypothesis for the phase space distribution of the dSphs and that of the dark matter (DM) halo of the Galaxy within the context of a self-consistent model in which the functional form of the phase space distribution of DM particles follows the King model i.e. the `lowered isothermal' distribution and the potential of the Galaxy is determined self-consistently by including the gravitational cross-coupling between visible matter and DM particles. This analysis, coupled with virial arguments, yields an estimate of $\gsim$ 270 km/s for the circular velocity of any test object at galactocentric distances of $\sim$ 100 kpc, the typical distances of the dSphs. The corresponding self-consistent values of the relevant DM halo model parameters, namely, the local (i.e., the solar neighbourhood) values of the DM density and velocity dispersion in the King model and its truncation radius, are estimated to be $\sim$ 0.3 GeV/cm^3, >350 km/s and $\gsim$ 150 kpc, respectively. Similar self-consistent studies with other possible forms of the DM distribution function will be useful in assessing the robustness of our estimates of the Galaxy's DM halo parameters.
description: 38 pages latex, includes 16 ps figs, uses elsart.cls, To appear in New Astronomy
Bertinho: Galician BERT Representations
Creators: name: Vilares, David
name: Garcia, Marcos
name: Gómez-Rodríguez, Carlos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This paper presents a monolingual BERT model for Galician. We follow the recent trend that shows that it is feasible to build robust monolingual BERT models even for relatively low-resource languages, while performing better than the well-known official multilingual BERT (mBERT). More particularly, we release two monolingual Galician BERT models, built using 6 and 12 transformer layers, respectively; trained with limited resources (~45 million tokens on a single GPU of 24GB). We then provide an exhaustive evaluation on a number of tasks such as POS-tagging, dependency parsing and named entity recognition. For this purpose, all these tasks are cast in a pure sequence labeling setup in order to run BERT without the need to include any additional layers on top of it (we only use an output classification layer to map the contextualized representations into the predicted label). The experiments show that our models, especially the 12-layer one, outperform the results of mBERT in most tasks.
description: Accepted in the journal Procesamiento del Lenguaje Natural
Capillary Filling of Anodized Alumina Nanopore Arrays
Creators: name: Alvine, K. J.
name: Shpyrko, O. G.
name: Pershan, P. S.
name: Shin, K.
name: Russell, T. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The filling behavior of a room temperature solvent, perfluoromethylcyclohexane, in approximately 20 nm nanoporous alumina membranes was investigated in situ with small angle x-ray scattering. Adsorption in the pores was controlled reversibly by varying the chemical potential between the sample and a liquid reservoir via a thermal offset, $Δ$T. The system exhibited a pronounced hysteretic capillary filling transition as liquid was condensed into the nanopores. These results are compared with Kelvin-Cohan theory, with a modified Derjaguin approximation, as well as with predictions by Cole and Saam.
description: 4 pages, 3 figures, pre-proofs
Non-adiabatic Arbitary Geometric Gates in 2-qubit NMR Model
Creators: name: Tong, Yu
name: Tao, Ruibao
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a 2-qubit nuclear spin system for realizing an arbitrary geometric quantum phase gate by means of non-adiabatic operation. A single magnetic pulse with multi harmonic frequencies is applied to manipulate the quantum states of 2-qubit instantly. Using resonant transition approximation, the time dependent Hamiltonian of two nuclear spins can be solved analytically. The time evolution of the wave function is obtained without adiabatic approximation. The parameters of magnetic pulse, such as the frequency, amplitude, phase of each harmonic part as well as the time duration of the pulse, are determined for achieving an arbitrary non-adiabatic geometric phase gate. The derivation of non-adiabatic geometric controlled phase gates and A-A phase are also addressed.
description: 7 pages, 1 figure
Experimental Validation of Linear and Nonlinear MPC on an Articulated Unmanned Ground Vehicle
Creators: name: Kayacan, Erkan
name: Saeys, Wouter
name: Ramon, Herman
name: Belta, Calin
name: Peschel, Joshua M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper focuses on the trajectory tracking control problem for an articulated unmanned ground vehicle. We propose and compare two approaches in terms of performance and computational complexity. The first uses a nonlinear mathematical model derived from first principles and combines a nonlinear model predictive controller (NMPC) with a nonlinear moving horizon estimator (NMHE) to produce a control strategy. The second is based on an input-state linearization (ISL) of the original model followed by linear model predictive control (LMPC). A fast real-time iteration scheme is proposed, implemented for the NMHE-NMPC framework and benchmarked against the ISL-LMPC framework, which is a traditional and cheap method. The experimental results for a time-based trajectory show that the NMHE-NMPC framework with the proposed real-time iteration scheme gives better trajectory tracking performance than the ISL-LMPC framework and the required computation time is feasible for real-time applications. Moreover, the ISL-LMPC produces results of a quality comparable to the NMHE-NMPC framework at a significantly reduced computational cost.
title: Variational Inference for Dirichlet Process Mixtures and Application to Gaussian Estimation
Creators: name: Lipovec, Thomas
Publisher: name: TU Wien
Year: 2023
Subjects: subject: Bayesian inference
subject: Bayesian estimation
subject: Bayesian model
subject: Bayesian nonparametrics
subject: Dirichlet process
subject: Dirichlet process mixture
subject: mixture model
subject: clustering
subject: variational inference
subject: variational Bayes
subject: statistical signal processing
subject: Gaussian mixture
subject: probabilistic machine learning
subject: exponential family

description: Bayesian nonparametric models have emerged as a flexible tool for learning patterns and structures in complex data. A well-known Bayesian nonparametric model is the Dirichlet process mixture (DPM) model. The DPM model extends the Bayesian mixture model with a finite number of mixture components to a Bayesian mixture model with a countably infinite number of mixture components while permitting the use of efficient Bayesian inference methods. Thereby, it becomes possible to cluster data and estimate unknown parameters without specifying the number of clusters and unknown parameters a priori. Practical Bayesian inference methods for DPM models include Markov chain Monte Carlo (MCMC) and variational inference (VI) methods. In this thesis, we focus on the VI methodology and provide a detailed derivation of the coordinate ascent variational inference (CAVI) algorithm for DPM models. Subsequently, we apply the CAVI algorithm to a Gaussian estimation problem that involves noisy observations of object features modeled by a DPM with Gaussian mixture components. We present simulation results that compare the improvement of the estimation accuracy of the object features due to clustering achieved by our CAVI algorithm and by a previously proposed MCMC algorithm. Our simulation results demonstrate to which extent we have to sacrifice estimation accuracy when opting for the less accurate but more efficient CAVI algorithm as opposed to the MCMC algorithm.
Obscured and unobscured AGN populations in a hard-X-ray selected sample of the XMDS survey
Creators: name: Tajer, M.
name: Polletta, M.
name: Chiappetti, L.
name: Maraschi, L.
name: Trinchieri, G.
name: Maccagni, D.
name: Andreon, S.
name: Garcet, O.
name: Surdej, J.
name: Pierre, M.
name: Fevre, O. Le
name: Franceschini, A.
name: Lonsdale, C. J.
name: Surace, J. A.
name: Shupe, D. L.
name: Fang, F.
name: Robinson, M. Rowan -
name: Smith, H. E.
name: Tresse, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Our goal is to probe the populations of obscured and unobscured AGN investigating their optical-IR and X-ray properties as a function of X-ray flux, luminosity and redshift within a hard X-ray selected sample of 136 X-ray sources in the XMM Medium Deep Survey (XMDS) with wide multiwavelength coverage. The XMDS area is covered with optical photometry from the VVDS and CFHTLS surveys and infrared Spitzer data. Based on the X-ray luminosity and X-ray to optical ratio, 132 sources are likely AGN, of which 122 have unambiguous optical - IR identification. The observed optical and IR spectral energy distributions of sources are fitted with AGN/galaxy templates in order to classify them and compute photometric redshifts. 70% of the AGN are fitted by a type 2 AGN or a star forming galaxy template and are grouped together in a single class of ``optically obscured'' AGN. They have ``red'' optical colors and generally show significant X-ray absorption from X-ray spectra or hardness ratios (N$_H > 10^{22}$ cm$^{-2}$). Sources with SEDs typical of type 1 AGN have ``blue'' optical colors and exhibit X-ray absorption in about 30% of cases. We performed a stacking analysis for obscured and type 1 AGN. The stacked X-ray spectrum of obscured AGN is flatter than that of type 1 AGN and has an average spectral slope of Gamma = 1.6. The subsample of objects fitted by a galaxy template has an even harder stacked spectrum, with Gamma = 1.2 - 1.3. The obscured fraction is larger at lower fluxes, lower redshifts and lower luminosities. X-ray absorption is less common than ``optical'' obscuration and its incidence is nearly constant with redshift and luminosity. This implies that X-ray absorption is not necessarily related to optical obscuration.
description: 33 pages, 21 figures, accepted for publication in A&A
Doğu Akdeniz Bölgesinde Mısır ve Pamuk Üretiminde İnsan ve Makina İş Gücü Gereksinimlerinin Belirlenmesi.pdf
Creators: name: Bilgili, Mehmet Emin
name: KUZU, Hamza
name: AYBEK, Ali
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 300210
subject: Sustainable agricultural development

description: Nowadays, studies are carried out to reduce many aspects of production input costs in order to provide security of supply and demand in agricultural production and a suitable purchasing environment for the final consumer. In this study, the values of human and machine labor in the unit area of corn and cotton production were determined for the Eastern Mediterranean Region. Human and machine labor values used in corn production; for tillage and planting as İİG (human labor requirement) 12.2 h/ha, MİG (machine labor requirement) 10.9 h/ha, for maintenance works as İİG 74.2 h/ha, MİG 4.3 h/ha, for harvesting and threshing works as İİG 3.9 h/ha, MİG 2.9 h/ha, in the cotton production process, the processes and the values of İİG and MİG were determined as 12.3 h/ha, 11.2 h/ha 292.4 h/ha, 9.1 h/ha and 366.7 h/ha, 3.7 h/ha, respectively.
On the independent points in the sky for the search of periodic gravitational wave
Creators: name: Sahay, S. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the independent points in the sky require to search the periodic gravitational wave, assuming the noise power spectral density to be flat. We have made an analysis with different initial azimuth of the Earth for a week data set. The analysis shows significant difference in the independent points in the sky for the search. We numerically obtain an approximate relation to make trade-off between computational cost and sensitivities. We also discuss the feasibility of the coherent search in small frequency band in reference to advanced LIGO.
description: 10 Pages, 2 figures
Influence of sound on empirical brain networks
Creators: name: Sawicki, Jakub
name: Schöll, Eckehard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We analyze the influence of an external sound source in a network of FitzHugh-Nagumo oscillators with empirical structural connectivity measured in healthy human subjects. We report synchronization patterns, induced by the frequency of the sound source. We show that the level of synchrony can be enhanced by choosing the frequency of the sound source and its amplitude as control parameters for synchronization patterns. We discuss a minimum model elucidating the modalities of the influence of music on the human brain.
description: 6 Figures
Sexual Decision-making of Immigrant East Indians: Risky or Not?
Creators: name: Urry, Kelley D
name: Doshi, Neeti V
name: Yoskowitz, Nicole A
Publisher: name: Columbia Undergraduate Science Journal
Year: 2006

description: Reports of growing HIV/AIDS infection rates in India have brought increasing attention to the concept of sexuality in South Asian culture. There is a lack of awareness of the risks of sexual behavior due to the stigma associated with sexuality. As immigrants in the United States, young South Asians face cultural shock when it comes to sexuality and sexual behavior. Consequently, a tension exists between the belief systems of the country of origin and the individual’s belief system, influenced by American culture. The objective of this study is to understand the socio-cultural influences on individual decision-making regarding the sexual activity of a South Asian (specifically, Indian) immigrant population, using theories and methods from cognitive science. Twenty first- and second-generation, heterosexual, male and female Indians living in New York City were interviewed regarding their sexual activity. Results show that 55% of participants engaged in sexual activity, of which 22% were first-generation and 82% were second-generation. This pattern suggests a trend in sexual behavior that follows a well known “U-shaped” curve. The bottom of the curve represents the low risk behavior of first generation immigrants in their transition to an unfamiliar culture, where there is a high level of uncertainty and desire to maintain their original value system. Subsequent generations become assimilated to the new culture, and thus are more likely to adopt the sexual practices of this new culture. The transmission of beliefs from first to second generation is crucial with regard to decision-making governing (safe) sexual behavior for subsequent generations.
description: Columbia Undergraduate Science Journal, Vol 1 (2006): Spring 2006
Probabilistic bearing capacity of a strip footing resting on a spatially varying soil slope considering nonstationary characteristics
Creators: name: Sharma, Priyanka
name: Pain, Anindya
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Mathematical Sciences not elsewhere classified
subject: Mental Health

description: The slope has an adverse effect on the ultimate bearing capacity of shallow foundations. Due to inherent variability in soil properties and geometric factors of slopes, designing a foundation on slopes is a perplexing and challenging task. The spatial variation in the soil’s shear strength property is commonly ignored by the designers to avoid complexity in design. Shear strength property in real scenarios increases along the depth and simultaneously it poses spatial variability. This kind of randomness is modelled using a non-stationary random field. The proposed study aims to evaluate the probabilistic bearing capacity of strip footing on spatially varying slopes. The probabilistic bearing capacity factor is analyzed for different influential factors like geometry and footing placements, correlation distances and coefficient of variation of soil properties. Slopes exhibiting nonstationary characteristics contribute to remarkable differences in the bearing capacity of footing as compared to the stationary condition. The study highlights that the geometry factors, footing placements, soil spatial variability and most importantly the increasing trend of soil strength play a critical role in the bearing capacity and risk of failure of a footing. High variations in the failure probability can be observed even after considering safety factors.