cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Field Reconstruction in Sensor Networks with Coverage Holes and Packet Losses
Creators: name: Nordio, Alessandro
name: Chiasserini, Carla-Fabiana
Publisher: name: arXiv
Year: 2010
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Environmental monitoring is often performed through a wireless sensor network, whose nodes are randomly deployed over the geographical region of interest. Sensors sample a physical phenomenon (the so-called field) and send their measurements to a {\em sink} node, which is in charge of reconstructing the field from such irregular samples. In this work, we focus on scenarios of practical interest where the sensor deployment is unfeasible in certain areas of the geographical region, e.g., due to terrain asperities, and the delivery of sensor measurements to the sink may fail due to fading or to transmission collisions among sensors simultaneously accessing the wireless medium. Under these conditions, we carry out an asymptotic analysis and evaluate the quality of the estimation of a d-dimensional field when the sink uses linear filtering as a reconstruction technique. Specifically, given the matrix representing the sampling system, V, we derive both the moments and an expression of the limiting spectral distribution of VV*, as the size of V goes to infinity and its aspect ratio has a finite limit bounded away from zero. By using such asymptotic results, we approximate the mean square error on the estimated field through the eta-transform of VV*, and derive the sensor network performance under the conditions described above.
Magnetoelastic nonlinear metamaterials
Creators: name: Lapine, Mikhail
name: Shadrivov, Ilya V.
name: Powell, David A.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We introduce the concept of magnetoelastic metamaterials with electromagnetic properties depending on elastic deformation. We predict a strong nonlinear and bistable response of such metamaterials caused by their structural reshaping in response to the applied electromagnetic field. In addition, we demonstrate experimentally the feasibility of the predicted effect.
description: 4 pages, 5 figures
Doroneuria baumanni Stark & Gaufin 1974
Creators: name: Stark, Bill P.
name: Green, Stephen
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Doroneuria
Doroneuria baumanni

description: Doroneuria baumanni Stark & Gaufin (Figs. 9-12) Doroneuria baumanni Stark & Gaufin, 1974:88. Holotype ♂ (United States National Museum), Burney Falls State Park, Shasta Co., California Material examined. California: Siskiyou Co., Big Springs, Mt. Shasta City Park, 7 July 1979, B. Stark, K.W. Stewart, 1♀ (BPS). Oregon: Benton Co., Kiser Creek, Hwy 39, 1 June 2000, B. Stark, I. Sivec, M. Zúñiga, 3♂, 1♀ (BPS). Multnomah Co., Wahkeena Falls, 25 June 1985, B. Stark, 24♂, 4♀ (BPS). Washington: Pierce Co., Carbon River, 16 August 1999, B.C. Kondratieff, 1♂, 3♀ (BPS). Egg. Outline oval with short, narrow collar (Fig. 9). Egg length ca. 500 μm, equatorial width ca. 400 μm, collar length ca. 20 μm, width ca. 50 μm. Chorionic surface coarsely punctate with shallow pits over middle half of egg (Figs 10, 12.); punctate zone ca. 260 μm wide; area around collar and a narrow opercular ring around lid lack pits; some pits on lid form obscure follicle cell impression walls. Micropylar row located on lid (Fig. 11); orifices raised, canals not clearly visible on surface.
description: Published as part of Stark, Bill P. & Green, Stephen, 2011, Eggs Of Western Nearctic Acroneuriinae (Plecoptera: Perlidae), pp. 157-166 in Illiesia 7 (17) on page 160, DOI: 10.5281/zenodo.4760209
Bound state energies and phase shifts of a non-commutative well
Creators: name: Thom, J. D.
name: Scholtz, F. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Non-commutative quantum mechanics can be viewed as a quantum system represented in the space of Hilbert-Schmidt operators acting on non-commutative configuration space. Within this framework an unambiguous definition can be given for the non-commutative well. Using this approach we compute the bound state energies, phase shifts and scattering cross sections of the non- commutative well. As expected the results are very close to the commutative results when the well is large or the non-commutative parameter is small. However, the convergence is not uniform and phase shifts at certain energies exhibit a much stronger then expected dependence on the non-commutative parameter even at small values.
description: 12 pages, 8 figures
Chandra observations of Cygnus OB2
Creators: name: Wright, Nicholas J.
name: Drake, Jeremy J.
name: Drew, Janet E.
name: Vink, Jorick S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Cygnus OB2 is the nearest example of a massive star forming region, containing over 50 O-type stars and hundreds of B-type stars. We have analyzed two Chandra pointings in Cyg OB2, detecting ~1700 X-ray sources, of which ~1450 are thought to be members of the association. Optical and near-IR photometry has been obtained for ~90% of these sources from recent deep Galactic plane surveys. We have performed isochrone fits to the near-IR color-magnitude diagram, deriving ages of 3.5(+0.75,-1.0) and 5.25(+1.5,-1.0) Myrs for sources in the two fields, both with considerable spreads around the pre-MS isochrones. The presence of a second population in the region, somewhat older than the present-day O-type stars, has been suggested by other authors and fits with the ages derived here. The fraction of sources with inner circumstellar disks (as traced by the K-band excess) is found to be very low, but appropriate for a population of age ~5 Myrs. We measure the stellar mass functions and find a power-law slope of Gamma = -1.09 +/- 0.13, in good agreement with the global mean value estimated by Kroupa. A steepening of the mass function at high masses is observed and we suggest this is due to the presence of the previous generation of stars that have lost their most massive members. Finally, combining our mass function and an estimate of the radial density profile of the association suggests a total mass of Cyg OB2 of ~30,000 Msun, similar to that of many of our Galaxy's most massive star forming regions.
description: 6 pages, 4 figures, conference proceedings for JENAM 2010: Star Clusters in the Era of Large Surveys, Editors: A.Moitinho and J. Alves
FACILITATING SENTENCE PROCESSING IN APHASIA: EVIDENCE FROM SELF-PACED READING
Creators: name: Man, Grace Hoi-Yan
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 420110
subject: Speech pathology

description: It is well known that persons with aphasia (PWA) demonstrate deficits in sentence processing. Specifically, many show difficulties with syntactic re-analysis, or the ability to revise one’s interpretation of a sentence due to a temporary ambiguity. Emerging evidence suggests that structural priming, individuals’ tendency to unconsciously re-use a previously encountered structure, can facilitate production and comprehension of different sentence structures in PWA. However, there are inconsistencies within the literature regarding the robustness of priming across different sentence structures and tasks, and the existing findings are limited to off-line measures which do not capture real-time sentence processing. Furthermore, a range of individual variability has been shown in magnitudes of priming effects.This current project addressed these critical gaps by investigating the effects of structural priming on comprehension of sentences with reduced relative (RR) clauses. Study 1 examined whether PWA show immediate structural priming and longer-term cumulative priming in a computerized self-paced reading paradigm. In this study, participants read RR target sentences that were preceded by prime sentences with either an RR or a main clause (MC) interpretation. Study 2 examined if and how individuals’ cognitive (memory) skills account for individual variability shown in structural priming. Participants completed a Serial Reaction Time task as a measure of implicit memory, and the Verbal Paired Associates I task as a measure of explicit memory. Eighteen healthy adults (HA) and 18 PWA participated in both studies.In Study 1, PWA demonstrated robust and timely immediate structural priming effect, providing novel evidence that structural priming can be captured in real-time using self-paced reading, and that priming can help ameliorate syntactic re-analysis deficits in PWA. However, these online changes were not reflected in the behavioral measures, highlighting the sensitivity of self-paced reading in detecting the dissociation between automatic, real-time processing and overt behavioral responses. Cumulative priming as traditionally defined was also not significant for either group, although participants became faster at reading RR target sentences as the session progressed. Study 2’s findings suggest that implicit memory may be an important cognitive skill to promote sentence processing, whereas having strong explicit memory may not be facilitative of the learning process.
Doroneuria theodora
Creators: name: Stark, Bill P.
name: Green, Stephen
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Doroneuria
Doroneuria theodora

description: Doroneuria theodora (Needham & Claassen) (Figs. 13-16) Acroneuria (Doroneuria) theodora Needham & Claassen, 1922:254. Holotype ♀ (Cornell University), Yellowstone National Park, Wyoming Material examined. Montana: Gallatin Co., Hyalite Creek, above Window Rock, 20 August 2004, B. Stark, I. Sivec, 1♀ (BPS). Wyoming: Johnson Co., Middle Fork Clear Creek, 17 August 2004, B. Stark, I. Sivec, 2♂, 2♀ (BPS). Park Co., Lake Creek, Hwy 296, 18 August 2004, B. Stark, I. Sivec, 3♂, 3♀ (BPS). Egg. Outline oval with short, narrow collar (Fig. 13). Egg length ca. 530 μm, equatorial width ca. 400 μm, collar length ca. 30 μm, width ca. 60 μm. Chorionic surface coarsely punctate in a band ca. 325 μm wide, extending from near collar (Figs. 14, 16) to smooth opercular band surrounding lid. Lid with obscure, irregularly shaped follicle cell impressions, but punctations absent (Fig.). Micropylar row located on lid; orifices raised, canals obscure (Fig. 15). Comments. Eggs of Doroneuria are large, oval, and have small collars. The chorionic surface has a broad median zone of shallow pits, a narrow smooth opercular band and micropyles located on the lid near the anterior pole (Figs. 9, 13). The eggs of the two species are quite similar, but differ subtly among specimens examined in two respects. The punctate zone for D. theodora eggs extends nearer the collar and is, therefore, considerably broader in that species than in D. baumanni (Figs. 10, 14). In addition, the lid of D. theodora eggs lacks punctations, whereas in D. baumanni this area has obscure punctations which outline the irregular margins of follicle cell impressions (Fig. 12).
description: Published as part of Stark, Bill P. & Green, Stephen, 2011, Eggs Of Western Nearctic Acroneuriinae (Plecoptera: Perlidae), pp. 157-166 in Illiesia 7 (17) on page 161, DOI: 10.5281/zenodo.4760209
Phenomenological model of multiphoto-production of charged pion pairs on the proton
Creators: name: Dadi, Anis
name: Müller, Carsten
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The production of charged pion pairs via multiphoton absorption from an intense X-ray laser wave colliding with an ultrarelativistic proton beam is studied. Our calculations include the contributions from both the electromagnetic and hadronic interactions where the latter are described approximately by a phenomenological Yukawa potential. Order-of-magnitude estimates for $π^+π^-$ production on the proton by two- and three-photon absorption from the high-frequency laser field are obtained and compared with the corresponding rates for $μ^+μ^-$ pair creation.
description: 6 pages, 3 figures
Condition monitoring platform for proactive and reactive operation and maintenance (O&M) with enhanced data analytic functionalities, Presentation, 11thPVPMC 2018, China
Creators: name: Livera, Andreas
name: Theristis, Marios
name: Makrides, George
name: Sutterlueti, Juergen
name: Georghiou, E. George
Publisher: name: Zenodo
Year: 2018

description: A key factor important for the future photovoltaic (PV) uptake and the PV value chain is to reduce the Levelized Cost of Electricity (LCoE). This can be achieved by increasing lifetime performance and reducing operating costs through robust condition monitoring offering quality control, safeguarding guarantees and cost-effective operation and maintenance (O&M). Specifically, since monitoring systems can assist to reduce the LCoE of PV, specific novel features based on advanced data analytics need to be included, such as data quality routines (DQRs) providing data sanity and integrity, system health state monitors offering real time operating state information, failure diagnosis through data analysis and other added value services such as performance loss quantification and degradation rate (DR) estimation
CSNK1A1/CK1α suppresses autoimmunity by restraining the CGAS-STING1 signaling
Creators: name: Pan, Mingyu
name: Hu, Tongyu
name: Lyu, Jiao
name: Yin, Yue
name: Sun, Jing
name: Wang, Quanyi
name: Xu, Lingxiao
name: Hu, Haiyang
name: Wang, Chen
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Mental Health

description: STING1 (stimulator of interferon response cGAMP interactor 1) is the quintessential protein in the CGAS-STING1 signaling pathway, crucial for the induction of type I IFN (interferon) production and eliciting innate immunity. Nevertheless, the overactivation or sustained activation of STING1 has been closely associated with the onset of autoimmune disorders. Notably, the majority of these disorders manifest as an upregulated expression of type I interferons and IFN-stimulated genes (ISGs). Hence, strict regulation of STING1 activity is paramount to preserve immune homeostasis. Here, we reported that CSNK1A1/CK1α, a serine/threonine protein kinase, was essential to prevent the overactivation of STING1-mediated type I IFN signaling through autophagic degradation of STING1. Mechanistically, CSNK1A1 interacted with STING1 upon the CGAS-STING1 pathway activation and promoted STING1 autophagic degradation by enhancing the phosphorylation of SQSTM1/p62 at serine 351 (serine 349 in human), which was critical for SQSTM1-mediated STING1 autophagic degradation. Consistently, SSTC3, a selective CSNK1A1 agonist, significantly attenuated the response of the CGAS-STING1 signaling by promoting STING1 autophagic degradation. Importantly, pharmacological activation of CSNK1A1 using SSTC3 markedly repressed the systemic autoinflammatory responses in the trex1-/- mouse autoimmune disease model and effectively suppressed the production of IFNs and ISGs in the PBMCs of SLE patients. Taken together, our study reveals a novel regulatory role of CSNK1A1 in the autophagic degradation of STING1 to maintain immune homeostasis. Manipulating CSNK1A1 through SSTC3 might be a potential therapeutic strategy for alleviating STING1-mediated aberrant type I IFNs in autoimmune diseases. Abbreviations: BMDMs: bone marrow-derived macrophages; cGAMP: cyclic GMP-AMP; CGAS: cyclic GMP-AMP synthase; HTDNA: herring testes DNA; IFIT1: interferon induced protein with tetratricopeptide repeats 1; IFNA4: interferon alpha 4; IFNB: interferon beta; IRF3: interferon regulatory factor 3; ISD: interferon stimulatory DNA; ISGs: IFN-stimulated genes; MEFs: mouse embryonic fibroblasts; PBMCs: peripheral blood mononuclear cells; RSAD2: radical S-adenosyl methionine domain containing 2; SLE: systemic lupus erythematosus; STING1: stimulator of interferon response cGAMP interactor 1; TBK1: TANK binding kinase 1.
Accretion processes in magnetically and tidally perturbed Schwarzschild black holes
Creators: name: Kovács, Zoltán
name: Gergely, László Árpád
name: Vasúth, Mátyás
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the accretion process in the region of the Preston-Poisson space-time describing a Schwarzschild black hole perturbed by asymptotically uniform magnetic field and axisymmetric tidal structures. We find that the accretion disk shrinks and the marginally stable orbit shifts towards the black hole with the perturbation. The radiation intensity of the accretion disk increases, while the radius where radiation is maximal remains unchanged. The spectrum is blue-shifted. Finally, the conversion efficiency of accreting mass into radiation is decreased by both the magnetic and the tidal perturbations.
description: to be published in Phys. Rev. D, 13 pages, 7 figures, 1 table
Hesperoperla hoguei Baumann & Stark 1980
Creators: name: Stark, Bill P.
name: Green, Stephen
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Hesperoperla
Hesperoperla hoguei

description: Hesperoperla hoguei Baumann & Stark (Figs. 17-20) Hesperoperla hoguei Baumann & Stark, 1980:63. Holotype ♂ (Natural History Museum, Los Angeles County), Gibson Creek, Mendocino Co., California Material examined. California: Plumas Co., Domingo Springs, 8 miles NW Chester, Old Red Bluff Road, 21 September 2007, J. Sandberg, 2♂, 5♀ (BPS). Sierra Co., Big Spring, Hwy 49, 2 miles N Bassetts, 3 July 2010, P.A. Opler, 1♀ (CSU). Egg. Outline oval with short, wide collar (Fig. 17); collar base encircled by prominent raised ridge, sides of egg body adjacent to ridge with a series of vertical struts. Egg length ca. 400 μm, equatorial width ca. 360 μm, collar length ca. 50 μm, median width ca. 75 μm. Sides of collar with several prominent longitudinal ridges (Fig. 19); collar rim flanged and irregularly incised (Figs. 18, 20). Anchor biscuit shaped with moderately long pedicel; surface covered with mushroom bodies. Chorionic surface covered with shallow, hexagonal follicle cell impressions. Micropylar row subequatorial.
description: Published as part of Stark, Bill P. & Green, Stephen, 2011, Eggs Of Western Nearctic Acroneuriinae (Plecoptera: Perlidae), pp. 157-166 in Illiesia 7 (17) on page 162, DOI: 10.5281/zenodo.4760209
Topological properties of superconducting junctions
Creators: name: Pikulin, D. I.
name: Nazarov, Yuli V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by recent developments in the field of one-dimensional topological superconductors, we investigate the topological properties of s-matrix of generic superconducting junctions where dimension should not play any role. We argue that for a finite junction the s-matrix is always topologically trivial. We resolve an apparent contradiction with the previous results by taking into account the low-energy resonant poles of s-matrix. Thus no common topological transition occur in a finite junction. We reveal a transition of a different kind that concerns the configuration of the resonant poles.
Reduced, tame and exotic fusion systems
Creators: name: Andersen, Kasper K. S.
name: Oliver, Bob
name: Ventura, Joana
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Topology (math.AT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 55R35 (Primary) 55R40 (Secondary) 20D20

description: We define here two new classes of saturated fusion systems, reduced fusion systems and tame fusion systems. These are motivated by our attempts to better understand and search for exotic fusion systems: fusion systems which are not the fusion systems of any finite group. Our main theorems say that every saturated fusion system reduces to a reduced fusion system which is tame only if the original one is realizable, and that every reduced fusion system which is not tame is the reduction of some exotic (nonrealizable) fusion system.
Ionic partition and transport in multi-ionic channels: A Molecular Dynamics Simulation study of the OmpF bacterial porin
Creators: name: Faraudo, Jordi
name: Calero, Carles
name: Aguilella-Arzo, Marcel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We performed all-atom molecular dynamics simulations studying the partition of ions and the ionic current through the bacterial porin OmpF and two selected mutants. The study is motivated by new interesting experimental findings concerning their selectivity and conductance behaviour at neutral pH. The mutations considered here are designed to study the effect of removal of negative charges present in the constriction zone of the wild type OmpF channel (which contains on one side a cluster with three positive residues and on the other side two negatively charged residues). Our results show that these mutations induce an exclusion of cations from the constriction zone of the channel, substantially reducing the flow of cations. In fact, the partition of ions inside the mutant channels is strongly inhomogeneous, with regions containing excess of cations and regions containing excess of anions. Interestingly, the overall number of cations inside the channel is larger than the number of anions in the two mutants, as in the OmpF wild type channel. We found that the differences in ionic charge inside these channels are justified by the differences in electric charge between the wild type OmpF and the mutants, following an electroneutral balance.
Genome characterization and population genetic structure of white pine blister rust, Cronartium ribicola
Creators: name: Pu, Ting
Publisher: name: University of British Columbia
Year: 2014

description: Rust fungi cause some of the most severe pine diseases. Cronartium ribicola (J. C. Fisch.), the causal agent of white pine blister rust, was introduced accidentally to North America from Europe in the late 1800s. Since then, it has devastated a large number of native, commercially valuable white pines, and is threatening alpine ecosystem stability by endangering high elevation white pines. In order to better understand the global epidemiology of this pathogen, we conducted a genome scan of a global collection of C. ribicola using Genotyping-by-Sequencing (GBS) to: 1) ascertain the origin and the routes of introduction of C. ribicola, and 2) uncover cryptic population structure of C. ribicola in western North America, in relation to different pine hosts, climates and landscapes. More than eight thousand single nucleotide polymorphism markers were genotyped on 192 samples of C. ribicola from three continents. The highest genetic and nucleotidic diversity were observed in Siberian samples, supporting the hypothesis that central Russia is the center of origin of C. ribicola. Diversity was reduced in all other populations and was lowest in western North America. Genetic and nucleotidic diversity were two to five times lower in western than in eastern North America. This result supports the observation of multiple introductions of the pathogen in eastern North America and contrasts with the single reported introduction in western North America. However, western populations had a larger number of rare alleles. This could represent the signature of population expansion following a bottleneck or a selective sweep. A cryptic Coast/Interior split was detected within the western cluster, most likely maintained by the scarcity of white pines in central British Columbia acting like a barrier to gene flow. Finally, western individuals with a high level of eastern admixture were discovered in two populations east of the Continental Divide. This could indicate that the eastern-western barrier to gene flow is leaky. Such information is of significance to white pine resistance breeding programs and to the monitoring of this disease.
Exploration of a modified density dependence in the Skyrme functional
Creators: name: Erler, J.
name: Klüpfel, P.
name: Reinhard, P. -G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A variant of the basic Skyrme-Hartree-Fock (SHF) functional is considered dealing with a new form of density dependence. It employs only integer powers and thus will allow a more sound basis for projection schemes (particle number, angular momentum). We optimize the new functional with exactly the same adjustment strategy as used in an earlier study with a standard Skyrme functional. This allows direct comparisons of the performance of the new functional relative to the standard one. We discuss various observables: bulk properties of finite nuclei, nuclear matter, giant resonances, super-heavy elements, and energy systematics. The new functional performs at least as well as the standard one, but offers a wider range of applicability (e.g. for projection) and more flexibility in the regime of high densities.
The Highly Dynamic Behavior of the Innermost Dust and Gas in the Transition Disk Variable LRLL 31
Creators: name: Flaherty, Kevin
name: Muzerolle, James
name: Rieke, George
name: Gutermuth, Robert
name: Balog, Zoltan
name: Herbst, William
name: Megeath, S. T.
name: Kun, Maria
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We describe extensive synoptic multi-wavelength observations of the transition disk LRLL 31 in the young cluster IC 348. We combined four epochs of IRS spectra, nine epochs of MIPS photometry, seven epochs of cold-mission IRAC photometry and 36 epochs of warm mission IRAC photometry along with multi-epoch near-infrared spectra, optical spectra and polarimetry to explore the nature of the rapid variability of this object. We find that the inner disk, as traced by the 2-5micron excess stays at the dust sublimation radius while the strength of the excess changes by a factor of 8 on weekly timescales, and the 3.6 and 4.5micron photometry shows a drop of 0.35 magnitudes in one week followed by a slow 0.5 magnitude increase over the next three weeks. The accretion rate, as measured by PaBeta and BrGamma emission lines, varies by a factor of five with evidence for a correlation between the accretion rate and the infrared excess. While the gas and dust in the inner disk are fluctuating the central star stays relatively static. Our observations allow us to put constraints on the physical mechanism responsible for the variability. The variabile accretion, and wind, are unlikely to be causes of the variability, but both are effects of the same physical process that disturbs the disk. The lack of periodicity in our infrared monitoring indicates that it is unlikely that there is a companion within ~0.4 AU that is perturbing the disk. The most likely explanation is either a companion beyond ~0.4 AU or a dynamic interface between the stellar magnetic field and the disk leading to a variable scale height and/or warping of the inner disk.
description: Accepted to ApJ. 10 pages of text, plus 11 tables and 13 figures at the end
Phanoperla nana Zwick 1982
Creators: name: Mason, Denise
name: Stark, Bill P.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Phanoperla
Phanoperla nana

description: Phanoperla nana Zwick (Figs. 7-12) Phanoperla nana Zwick 1982a:100. Holotype ♂ (Naturhistorisches Museum, Wien), Peradeniya, [Central Province, Kandy District], Ceylon [Sri Lanka] Material examined. SRI LANKA: Matale District, Kibissa, 0.5 miles W Sigiriya Jungle, 28 June-4 July 1978, K. V. Krombein, P.B. Karunaratne, T. Wijesinhe, V. Kulasekare, 1♀ (USNM). Ratnapura District, Uggalkaltota, 23-26 June 1978, K. V. Krombein, P.B. Karunaratne, T. Wijesinhe, L. Jayawickrema, N. Karanaratne, 3♂, 8♀ (USNM). Egg. Outline oval with broadly rounded anterior pole (Fig. 7). Length ca. 318-330 μm, equatorial width ca. 230-240 μm. Collar ca. 18-22 μm long and ca. 55-63 μm wide, margin slightly flanged and irregularly incised, sides covered with two rows of irregular meshes (Figs. 9, 11). Globular anchor subtended by a ring of grape-like clusters of small globular bodies and supported on a long, slender pedicel (Fig. 11). Chorion with shallow, obscure pits over entire surface (Figs. 9-10); follicle cell impressions enclose pits in the chorionic zone adjacent to the collar (Fig. 8), but are not evident over most of surface. Micropyles with slanted, almost circular orifices, without elongate sperm guides (Fig. 12); micropylar row subequatorial. Comments. The anchor on the eggs of these specimens is consistent with that of P. nana (compare Fig. 11 with Fig. 8e in Zwick 1982a) and the female is small, has widely separated ocelli, and the subgenital plate is undeveloped. Zwick’s (1982a) comment on the P. nana egg chorion indicates the surface is “…very finely and densely punctate…” and in the egg image presented (Fig. 8e) there are no follicle cell impressions shown or mentioned in the description. Our figures show a small zone of follicle cell impressions surrounding the collar (Figs. 8-9), and a surface that is covered throughout with obscure pits. Consequently, these specimens might represent an undescribed sibling species in the P. nana -group, but because the aedeagus of males associated with the females at the Uggalkaltota site are consistent with the descriptions of P. nana provided by Zwick (1982a), we accept these females as the probable females of P. nana.
description: Published as part of Mason, Denise & Stark, Bill P., 2015, Notes On The Genus Phanoperla Banks From Sri Lanka And India (Plecoptera: Perlidae), pp. 29-40 in Illiesia 11 (4) on page 32, DOI: 10.5281/zenodo.4760908
description: {"references": ["Zwick, P. 1982 a. A revision of the Oriental stonefly genus Phanoperla (Plecoptera: Perlidae). Systematic Entomology, 7: 87 - 126."]}
Happiness is assortative in online social networks
Creators: name: Bollen, Johan
name: Goncalves, Bruno
name: Ruan, Guangchen
name: Mao, Huina
Publisher: name: arXiv
Year: 2011
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computation and Language (cs.CL)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Social networks tend to disproportionally favor connections between individuals with either similar or dissimilar characteristics. This propensity, referred to as assortative mixing or homophily, is expressed as the correlation between attribute values of nearest neighbour vertices in a graph. Recent results indicate that beyond demographic features such as age, sex and race, even psychological states such as "loneliness" can be assortative in a social network. In spite of the increasing societal importance of online social networks it is unknown whether assortative mixing of psychological states takes place in situations where social ties are mediated solely by online networking services in the absence of physical contact. Here, we show that general happiness or Subjective Well-Being (SWB) of Twitter users, as measured from a 6 month record of their individual tweets, is indeed assortative across the Twitter social network. To our knowledge this is the first result that shows assortative mixing in online networks at the level of SWB. Our results imply that online social networks may be equally subject to the social mechanisms that cause assortative mixing in real social networks and that such assortative mixing takes place at the level of SWB. Given the increasing prevalence of online social networks, their propensity to connect users with similar levels of SWB may be an important instrument in better understanding how both positive and negative sentiments spread through online social ties. Future research may focus on how event-specific mood states can propagate and influence user behavior in "real life".
description: 17 pages, 9 figures
Symplectic birational transformations of the plane
Creators: name: Blanc, Jérémy
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 14E07, 53D99

description: We study the group of symplectic birational transformations of the plane. It is proved that this group is generated by $\mathrm{SL}(2,\mathbb{Z})$, the torus and a special map of order $5$, as it was conjectured by A. Usnich. Then we consider a special subgroup $H$, of finite type, defined over any field which admits a surjective morphism to the Thompson group of piecewise linear automorphisms of $\mathbb{Z}^2$. We prove that the presentation for this group conjectured by Usnich is correct.
description: 14 pages
Poisson Yang-Baxter maps with binomial Lax matrices
Creators: name: Kouloukas, Theodoros E.
name: Papageorgiou, Vassilios G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A construction of multidimensional parametric Yang-Baxter maps is presented. The corresponding Lax matrices are the symplectic leaves of first degree matrix polynomials equipped with the Sklyanin bracket. These maps are symplectic with respect to the reduced symplectic structure on these leaves and provide examples of integrable mappings. An interesting family of quadrirational symplectic YB maps on $\mathbb{C}^4 \times \mathbb{C}^4$ with $3\times 3$ Lax matrices is also presented.
description: 22 pages, 3 figures
Measurements of black carbon properties during cloud, biomass burning, and free tropospheric conditions at a marine boundary layer site and high elevation mountain site
Creators: name: Schroder, Jason C.
Publisher: name: University of British Columbia
Year: 2014

description: Black carbon is a subset of the total atmospheric aerosol population that is formed in the incomplete combustion of fossil fuels, biofuels, and biomass. This research focused on the properties of black carbon particles measured in the boundary layer and free troposphere, as well as the activation of black carbon particles by cloud droplets. The primary motivation for this research is to increase our understanding of the properties of black carbon under these different atmospheric conditions. A single particle soot photometer was used to study properties of black carbon particles incorporated into cloud droplets at two field locations: 1) a marine boundary layer site, and 2) a high elevation mountain site. At both sites, a size dependence on the fraction of black carbon incorporated into cloud droplets was observed; and for small (<100 nm) diameters, black carbon was efficiently incorporated into droplets. In addition, at the marine boundary layer site, thick coatings were observed on the small diameter black carbon particles that were incorporated into the droplets, which was consistent with theory. The single particle soot photometer was also used at a high elevation mountain site to investigate properties of black carbon from biomass burning and black carbon within the free troposphere. The average mass concentration of black carbon was found to be significantly higher (approximately 9x) during periods of biomass burning than within the free troposphere, yet had similar mass median diameters. Coating thicknesses of black carbon containing particles during the two subsets of data were also investigated. Average coating thicknesses for black carbon core diameters between 140 to 160 nm was 55 nm when sampling in the free troposphere, but approximately 32 nm when sampling air masses influenced by biomass burning. The results presented in this dissertation increase our understanding of the properties of black carbon particles and how they vary as a function of location and type of air mass sampled. This information can be used to further constrain computer models that are used to predict how black carbon can affect climate.
A Chandra ACIS Study of the Young Star Cluster Trumpler 15 in Carina and Correlation with Near-infrared Sources
Creators: name: Wang, Junfeng
name: Feigelson, Eric D.
name: Townsley, Leisa K.
name: Broos, Patrick S.
name: Getman, Konstantin V.
name: Wolk, Scott J.
name: Preibisch, Thomas
name: Stassun, Keivan G.
name: Moffat, Anthony F. J.
name: Garmire, Gordon
name: King, Robert R.
name: McCaughrean, Mark J.
name: Zinnecker, Hans
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using the highest-resolution X-ray observation of the Trumpler 15 star cluster taken by the Chandra X-ray Observatory, we estimate the total size of its stellar population by comparing the X-ray luminosity function of the detected sources to a calibrator cluster, and identify for the first time a significant fraction (~14%) of its individual members. The highest-resolution near-IR observation of Trumpler 15 (taken by the HAWK-I instrument on the VLT) was found to detect most of our X-ray selected sample of cluster members, with a K-excess disk frequency of 3.8+-0.7%. The near-IR data, X-ray luminosity function, and published spectral types of the brightest members support a cluster age estimate (5-10 Myr) that is older than those for the nearby Trumpler 14 and Trumpler 16 clusters, and suggest that high-mass members may have already exploded as supernovae. The morphology of the inner ~0.7 pc core of the cluster is found to be spherical. However, the outer regions (beyond 2 pc) are elongated, forming an `envelope' of stars that, in projection, appears to connect Trumpler 15 to Trumpler 14; this morphology supports the view that these clusters are physically associated. Clear evidence of mass segregation is seen. This study appears in a Special Issue of the ApJS devoted to the Chandra Carina Complex Project (CCCP), a 1.42 square degree Chandra X-ray survey of the Great Nebula in Carina.
description: Accepted for the ApJS Special Issue on the Chandra Carina Complex Project (CCCP), scheduled for publication in May 2011. All 16 CCCP Special Issue papers are available at http://cochise.astro.psu.edu/Carina_public/special_issue.html through 2011 at least. 30 pages; 8 figures; 3 tables
The Critical Crossover at the n-Hexane - Water Interface
Creators: name: Tikhonov, Aleksey M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: According to estimates of the parameters of the critical crossover in monolayers of long-chain alcohol molecules adsorbed at the n-hexane - water interface, all systems in which this phenomenon is observed are characterized by the same value of the critical exponent $ν$ \approx 1.8.
description: 5 pages, 2 pictures, 1 table
A SAURON study of dwarf elliptical galaxies in the Virgo Cluster: kinematics and stellar populations
Creators: name: Ryś, Agnieszka
name: Falcón-Barroso, Jesús
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Dwarf elliptical galaxies (dEs) are the most common galaxy type in nearby galaxy clusters; even so, many of their basic properties have yet to be quantified. Here we present the results of our study of 4 Virgo dwarf ellipticals obtained with the SAURON integral field unit on the William Herschel Telescope (La Palma, Spain). While traditional long-slit observations are likely to miss more complicated kinematic features, with SAURON we are able to study both kinematics and stellar populations in two dimensions, obtaining a much more detailed view of the mass distribution and star formation histories. What is visible even in such a small sample is that dEs are not a uniform group, not only morphologically, but also as far as their kinematic and stellar population properties are concerned. We find the presence of substructures, varying degrees of flattening and of rotation, as well as differences in age and metallicity gradients. We confirm that two of our galaxies are significantly flattened, yet non-rotating objects, which makes them likely triaxial systems. The comparison between the dwarf and the giant groups shows that dEs could be a low-mass extension of Es in the sense that they do seem to follow the same trends with mass. However, dEs as progenitors of Es seem less likely as we have seen that dEs have much lower abundance ratios.
description: 8 pages, 6 figures; to appear in the proceedings of the JENAM 2010 Symposium on Dwarf Galaxies (Lisbon, September 9-10, 2010); minor edits and references added
Manifest SO(N) invariance and S-matrices of three-dimensional N=2,4,8 SYM
Creators: name: Agarwal, Abhishek
name: Young, Donovan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An on-shell formalism for the computation of S-matrices of SYM theories in three spacetime dimensions is presented. The framework is a generalization of the spinor-helicity formalism in four dimensions. The formalism is applied to establish the manifest SO(N) covariance of the on-shell superalgebra relevant to N =2,4 and 8 SYM theories in d=3. The results are then used to argue for the SO(N) invariance of the S-matrices of these theories: a claim which is proved explicitly for the four-particle scattering amplitudes. Recursion relations relating tree amplitudes of three-dimensional SYM theories are shown to follow from their four-dimensional counterparts. The results for the four-particle amplitudes are verified by tree-level perturbative computations and a unitarity based construction of the integrand corresponding to the leading perturbative correction is also presented for the N=8 theory. For N=8 SYM, the manifest SO(8) symmetry is used to develop a map between the color-ordered amplitudes of the SYM and superconformal Chern-Simons theories, providing a direct connection between on-shell observables of D2 and M2-brane theories.
description: 28 pages
Emergence of universal scaling in financial markets from mean-field dynamics
Creators: name: Vikram, S. V.
name: Sinha, Sitabhra
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: Collective phenomena with universal properties have been observed in many complex systems with a large number of components. Here we present a microscopic model of the emergence of scaling behavior in such systems, where the interaction dynamics between individual components is mediated by a global variable making the mean-field description exact. Using the example of financial markets, we show that asset price can be such a global variable with the critical role of coordinating the actions of agents who are otherwise independent. The resulting model accurately reproduces empirical properties such as the universal scaling of the price fluctuation and volume distributions, long-range correlations in volatility and multiscaling.
description: 5 pages, 3 figures
ADVANCEMENTS IN MEDICAL IMAGE CLASSIFICATION THROUGH FINE-TUNING NATURAL DOMAIN FOUNDATION MODELS
Creators: Mobina Mansoori
Sajjad Shahabodini
Farnoush Bayatmakou
Jamshid Abouei
Konstantinos N. Plataniotis
and Arash Mohammadi
Publisher: name: IEEE Signal Processing Society
Year: 2025

description: Using massive datasets, foundation models are large-scale, pre-trained models that perform a wide range of tasks. These models have shown consistently improved results with the introduction of new methods. It is crucial to analyze how these trends impact the medical field and determine if these advancements can influence the medical domain. This study investigates the application of re- cent state-of-the-art foundation models—DINOv2, MAE, VMamba, CoCa, SAM 2, and AIMv2—for medical image classification. We explore their effectiveness on datasets including CBIS-DDSM for mammography, ISIC2019 for skin lesions, APTOS2019 for diabetic retinopathy, and CHEXPERT for chest radiographs. By fine-tuning these models and evaluating their configurations, we aim to understand the potential of these advancements in medical image classification. The results indicate that these advanced models significantly enhance classification outcomes, demonstrating robust performance despite limited labeled data. Based on our results, AIMv2, the DINOv2 and SAM2 models outperformed others, demonstrating that progress in natural domain training has positively impacted the medical domain and improved classification outcomes.
Excitation of inertial modes in a closed grid turbulence experiment under rotation
Creators: name: Lamriben, Cyril
name: Cortet, Pierre-Philippe
name: Moisy, Frédéric
name: Maas, Leo R. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report an experimental study of the decay of grid-generated turbulence in a confined geometry submitted to a global rotation. Turbulence is generated by rapidly towing a grid in a parallelepipedic water tank. The velocity fields of a large number of independent decays are measured in a vertical plane parallel to the rotation axis using a corotating Particle Image Velocimetry system. We first show that, when a "simple" grid is used, a significant amount of the kinetic energy (typically 50%) is stored in a reproducible flow composed of resonant inertial modes. The spatial structure of those inertial modes, extracted by band-pass filtering, is found compatible with the numerical results of Maas [Fluid Dyn. Res. 33, 373 (2003)]. The possible coupling between these modes and turbulence suggests that turbulence cannot be considered as freely decaying in this configuration. Finally, we demonstrate that these inertial modes may be significantly reduced (down to 15% of the total energy) by adding a set of inner tanks attached to the grid. This suggests that it is possible to produce an effectively freely decaying rotating turbulence in a confined geometry.