cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Program in C for studying characteristic properties of two-body interactions in the framework of spectral distribution theory
Creators: name: Launey, K. D.
name: Sarbadhicary, S.
name: Dytrych, T.
name: Draayer, J. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a program in C that employs spectral distribution theory for studies of characteristic properties of a many-particle quantum-mechanical system and the underlying few-body interaction. In particular, the program focuses on two-body nuclear interactions given in a JT-coupled harmonic oscillator basis and calculates correlation coefficients, a measure of similarity of any two interactions, as well as Hilbert-Schmidt norms specifying interaction strengths. An important feature of the program is its ability to identify the monopole part (centroid) of a 2-body interaction, as well as its 'density-dependent' one-body and two-body part, thereby providing key information on the evolution of shell gaps and binding energies for larger nuclear systems. As additional features, we provide statistical measures for 'density-dependent' interactions, as well as a mechanism to express an interaction in terms of two other interactions. This, in turn, allows one to identify, e.g., established features of the nuclear interaction (such as pairing correlations) within a general Hamiltonian. The program handles the radial degeneracy for 'density-dependent' one-body interactions and together with an efficient linked list data structure, facilitates studies of nuclear interactions in large model spaces that go beyond valence-shell applications.
description: 22 pages, 3 figures
A Theory of Self-Enforcing Indefinite Agreements
Creators: name: Scott, Robert E.
Publisher: name: Columbia University
Year: 2003
Subjects: subject: Damages
subject: Investments
subject: Economics
subject: Promise (Law)
subject: Compensation (Law)
subject: Breach of contract
subject: Reciprocity (Commerce)
subject: Contracts
subject: Law
subject: FOS: Law

description: One of the core principles of contract law is the requirement of definiteness. Conventional wisdom holds, however, that the indefiniteness doctrine is largely ignored by courts. In this Article, Professor Scott examines the contemporary case law on indefinite contracts and his review yields three striking findings. First, there is a surprisingly high volume of litigation. Second, the indefiniteness doctrine lives on in the common law of contracts. Third, a large number of the indefiniteness cases involve contracts that are "deliberately" incomplete-that is, parties have declined to condition performance on available, verifiable measures that could be specified in the contract at relatively low cost. These findings raise a fundamental question: Why do parties write deliberately incomplete agreements in the shadow of a robust indefiniteness doctrine? One answer is that these agreements may be self-enforcing. But most of the recently litigated cases involve contracts that do not appear to be self-enforcing in the traditional sense. A second answer is indicated by recent work in experimental economics, which suggests that roughly half the population behave as if reciprocity were an important motivation, while the other half react as if motivated entirely by self-interest. This evidence of a taste for "reciprocal fairness" in nearly half the population, argues Professor Scott, may expand the domain of self-enforcing contracts beyond what is conventionally understood. It may also support a theory that predicts that deliberately incomplete contracts that rely on self-enforcement through reciprocal fairness between strangers are more efficient than the alternative of more complete, legally enforceable agreements.
Foolscap notebooks (01)
Creators: name: Higgins, Aidan, 1927-2015
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Fiction
valueUri: http://id.worldcat.org/fast/1423787
subject: Authorship
valueUri: http://id.worldcat.org/fast/822442
subject: English literature--Irish authors
valueUri: http://id.worldcat.org/fast/912074
subject: Authors, Irish
valueUri: http://id.worldcat.org/fast/822116
subject: English literature
valueUri: http://id.worldcat.org/fast/911989
subject: Literature
valueUri: http://id.worldcat.org/fast/999953
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Modernism (Literature)
valueUri: http://id.worldcat.org/fast/1024455
subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172

description: First of two foolscap sized notebooks/journals containing handwritten notes and drawings by Aidan Higgins for his novel "Langrishe, Go Down" (1966). I) pp. 1-52 "Notebook kept in Johannesburg, covering drafts of "Asylum"." (Sept. 21 - Nov. 22, 1958) II) pp. 1-55 and then unnumbered "Dublin notebook. Notes for Langrishe, Go Down ." (Nov. 14, 1960)
Theory of pump-probe photoemission in graphene: Ultrafast tuning of Floquet bands and local pseudospin textures
Creators: name: Sentef, M. A.
name: Claassen, M.
name: Kemper, A. F.
name: Moritz, B.
name: Oka, T.
name: Freericks, J. K.
name: Devereaux, T. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The control of physical properties of solids with short laser pulses is an intriguing prospect of ultrafast materials science. Continuous-wave high-frequency laser driving with circular polarization was predicted to induce a light-matter coupled new state possessing a quasi-static band structure with an energy gap and a quantum Hall effect, coined "Floquet topological insulator". Whereas the envisioned Floquet topological insulator requires well separated Floquet bands and therefore high-frequency pumping, a natural follow-up question regards the creation of Floquet-like states in graphene with realistic pump laser pulses. Here we predict that with short low-frequency laser pulses attainable in pump-probe experiments, states with local spectral gaps at the Dirac points and novel pseudospin textures can be achieved in graphene using circular light polarization. We demonstrate that time- and angle-resolved photoemission spectroscopy can track these states by measuring sizeable energy gaps and quasi-Floquet energy bands that form on femtosecond time scales. By analyzing Floquet energy level crossings and snapshots of pseudospin textures near the Dirac points, we identify transitions to new states with optically induced nontrivial changes of sublattice mixing that can lead to Berry curvature corrections of electrical transport and magnetization.
description: 7 pages, 4 figures plus Supplementary Material
Covariant Photon Quantization in the SME
Creators: name: Colladay, Don
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Gupta Bleuler quantization procedure is applied to the SME photon sector. A direct application of the method to the massless case fails due to an unavoidable incompleteness in the polarization states. A mass term can be included into the photon lagrangian to rescue the quantization procedure and maintain covariance.
description: Presented at the Sixth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 17-21, 2013
Felis nigripes Burchell 1824
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora
Felidae
Felis
Felis nigripes

description: Felis nigripes Burchell, 1824. Travels in Interior of Southern Africa, vol. 2: 592. TYPE LOCALITY: South Africa, Cape Prov., Bechuanaland, near Kuruman. DISTRIBUTION: South Africa; S. Namibia; Botswana. PROTECTED STATUS: CITES - Appendix I and U.S. ESA - Endangered. ISIS NUMBER: 5301412007001019001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Carnivora, pp. 244-289 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 280, DOI: 10.5281/zenodo.7352980
Functional characterization of macrophage receptors for in vitro phagocytosis of unopsonized Pseudomonas aeruginosa
Creators: name: Speert, David P.
name: Wright, Samuel D.
name: Silverstein, Samuel C.
name: Mah, Bernadette
Publisher: name: Columbia University
Year: 1988
Subjects: subject: Macrophages
subject: Mannose
subject: Pseudomonas aeruginosa
subject: Cytology
subject: Microbiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: The phagocytic receptor for unopsonized Pseudomonas aeruginosa was characterized functionally using human monocyte-derived macrophages. Freshly isolated human peripheral blood monocytes were unable to ingest unopsonized P. aeruginosa; ingestion did not occur until the cells had been in culture for 2 d and it became maximal after 4 d. Macrophages plated on coverslips derivatized with anti-BSA IgG or with human gamma-globulin lost the capacity to phagocytose unopsonized P. aeruginosa, unopsonized zymosan, and EIgG but bound C3bi-coated erythrocytes normally. Each of the four human IgG subclasses and Fc fragments of anti-BSA IgG inhibited phagocytosis of both unopsonized P. aeruginosa and EIgG. Phagocytosis of P. aeruginosa and zymosan was markedly impaired and EIgG minimally inhibited if macrophages were plated on coverslips derivatized with mannan or when mannan was added to the phagocytosis buffer. Phagocytosis of P. aeruginosa and zymosan, and binding of EC3bi was dependent on the presence of divalent cations, but phagocytosis of EIgG was not. The macrophage phagocytic receptor for unopsonized P. aeruginosa was inactivated by proteolytic enzymes. Phagocytosis of P. aeruginosa was inhibited by D-mannose, L-fucose, and alpha methyl mannoside, but not by L-mannose, D-fucose, or D-glucose. The same sugars inhibited phagocytosis of unopsonized zymosan. We conclude that phagocytosis of unopsonized P. aeruginosa by human monocyte-derived macrophages is facilitated by mannose receptors.
Ishimoto_Pkhd1KO_kidney_confocal_images
Creators: name: Menezes, Luis
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 329999
subject: Other biomedical and clinical sciences not elsewhere classified

description: Supplementary file including original confocal images, CellProfiler pipeline used to analyze them and output with segmented images used for measuring tubes and cells. Additional information can be found in the corresponding manuscript: Supplementary analysis of snRNAseq data in the manuscript: Novel ARPKD mouse model with near complete deletion of Polycystic Kidney and Hepatic Disease 1 (Pkhd1) genomic locus has multiple phenotypes but no renal cysts Authors: Yu Ishimoto1,5, Luis F Menezes1,5,6, Fang Zhou1, Teruhiko Yoshida1, Taishi Komori2, Jiahe Qiu1, Marian F Young2, Huiyan Lu3, Svetlana Potapova3, Patricia Outeda4, Terry Watnick4, Gregory G Germino1, 6. Affiliations: 1 Kidney Disease Branch; National Institute of Diabetes and Digestive and Kidney Disease (NIDDK), National Institutes of Health (NIH), Bethesda, Maryland, USA 2 Molecular Biology of Bones and Teeth Section, Department of Health and Human Services (DHHS), National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, Maryland, USA 3 Mouse Transgenic Core Facility, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health (NIH), Bethesda, MD, USA 4 University of Maryland School of Medicine, Division of Nephrology, Baltimore, Maryland, USA. 5 These authors contributed equally to the study. 6 Co-Corresponding authors.
Productivity and Engagement in an Aging America: The Role of Volunteerism
Creators: name: Carr, Dawn C.
name: Fried, Linda P.
name: Rowe, John Wallis
Publisher: name: Columbia University
Year: 2015
Subjects: Older volunteers
Aging--Health aspects
Voluntarism

description: Volunteering in late life is associated with health benefits such as reduced risk of hypertension, improved self-related health and well-being, delayed physical disability, enhanced cognition, and lower mortality. Although the mechanisms of these correlations are not clear, increases in physical activity, cognitive engagement, and social interactions likely play contributing roles. Volunteers are typically thought to represent a select group, often possessing higher levels of education and income, good health, and strong social networks. However, group evidence indicates that there are many members of groups of lower socioeconomic status (SES), including elderly adults, who serve their communities on a regular basis and in high-priority programs. We propose that the impact of volunteering in an aging population be recognized and invested into, and that effective programs harness social capital of older adults to address critical societal needs and also improve the well-being of older adults. While members of low-SES groups are less likely to volunteer, they exhibit disproportionately great benefits. The Experience Corps represents a model of an effective volunteerism program, in which elders work with young schoolchildren. Existing federal initiatives, in cluding the Foster Grandparent Program and Senior Companion Program – which target low-income elders – have had low participation with long waiting lists. Given the proven benefits and relatively low proportion of older persons who volunteer, enhancement of elder volunteerism presents a significant opportunity for health promotion and deserves consideration as a national public health priority.
2-Deoxyglucose selectively inhibits Fc and complement receptor-mediated phagocytosis in mouse peritoneal macrophages II...
Creators: name: Michl, Josef
name: Ohlbaum, Diane J.
name: Silverstein, Samuel C.
Publisher: name: Columbia University
Year: 1976
Subjects: subject: Macrophages
subject: Enzyme inhibitors
subject: Adenosine triphosphate--Synthesis
subject: Phagocytosis
subject: Cytology
subject: Microbiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Macrophages incubated in 2-deoxy-D-glucose (2-dG)-containing medium showed a marked decrease in cellular ATP content, and were unable to ingest IgG- and complement-coated erythrocytes via the corresponding membrane receptors for these ligands. However, the inhibitory effects of 2-dG on Fc- and C3 receptor-mediated phagocytosis were not a consequence of lowered macrophage ATP levels since addition of glucose or mannose to the culture medium restored the capacity of the macrophages to ingest IgG- and C3-coated particles without increasing ATP levels. These results indicate that Fc- and C3 receptor-mediated phagocytosis (opsonin dependent) differs qualitatively from the ingestion of latex and zymosan particles (opsonin independent); they suggest that the same regulatory molecules govern the responses of phagocytic cells to signals initiated by both the Fc and C3 receptors. The possibility that these molecules are regulated by glycosylation is discussed.
Trauer- und Todten-Gerüste, worauf erblasset ruhet, Der Allerdurchlauchtigst großmächtigst und unüberwindlichste Römische Kayser Carolus der VII. ...; [1745]
Creators: name: Steißlinger, Johann Andreas
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2009

description: In Fraktur
Low-Complexity Polynomial Channel Estimation in Large-Scale MIMO with Arbitrary Statistics
Creators: name: Shariati, Nafiseh
name: Björnson, Emil
name: Bengtsson, Mats
name: Debbah, Mérouane
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper considers pilot-based channel estimation in large-scale multiple-input multiple-output (MIMO) communication systems, also known as massive MIMO, where there are hundreds of antennas at one side of the link. Motivated by the fact that computational complexity is one of the main challenges in such systems, a set of low-complexity Bayesian channel estimators, coined Polynomial ExpAnsion CHannel (PEACH) estimators, are introduced for arbitrary channel and interference statistics. While the conventional minimum mean square error (MMSE) estimator has cubic complexity in the dimension of the covariance matrices, due to an inversion operation, our proposed estimators significantly reduce this to square complexity by approximating the inverse by a L-degree matrix polynomial. The coefficients of the polynomial are optimized to minimize the mean square error (MSE) of the estimate. We show numerically that near-optimal MSEs are achieved with low polynomial degrees. We also derive the exact computational complexity of the proposed estimators, in terms of the floating-point operations (FLOPs), by which we prove that the proposed estimators outperform the conventional estimators in large-scale MIMO systems of practical dimensions while providing a reasonable MSEs. Moreover, we show that L needs not scale with the system dimensions to maintain a certain normalized MSE. By analyzing different interference scenarios, we observe that the relative MSE loss of using the low-complexity PEACH estimators is smaller in realistic scenarios with pilot contamination. On the other hand, PEACH estimators are not well suited for noise-limited scenarios with high pilot power; therefore, we also introduce the low-complexity diagonalized estimator that performs well in this regime. Finally, we ...
description: Published at IEEE Journal of Selected Topics in Signal Processing - Special Issue on Signal Processing for Large-Scale MIMO Communications, 16 pages, 14 figures
A Comprehensive Study of Gamma-Ray Burst Optical Emission: III. Brightness Distributions and Luminosity Functions of Optical Afterglows
Creators: name: Wang, Xiang-Gao
name: Liang, En-Wei
name: Li, Liang
name: Lu, Rui-Jing
name: Wei, Jian-Yan
name: Zhang, Bing
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We continue our systematic statistical study on optical afterglow data of gamma-ray bursts (GRBs). We present the apparent magnitude distributions of early optical afterglows at different epochs (t= 10^2 s, t = 10^3 s, and 1 hour) for the optical lightcurves of a sample of 93 GRBs (the global sample), and for sub-samples with an afterglow onset bump or a shallow decay segment. For the onset sample and shallow decay sample we also present the brightness distribution at the peak time t_{p} and break time t_{b}, respectively. All the distributions can be fit with Gaussian functions. We further perform Monte Carlo simulations to infer the luminosity function of GRB optical emission at the rest-frame time 10^3 seconds, t_{p}, and t_{b}, respectively. Our results show that a single power-law luminosity function is adequate to model the data, with indices -1.40+/-0.10, -1.06+/- 0.16, and -1.54\+/- 0.22, respectively. Based on the derived rest-frame 10^3 s luminosity function, we generate the intrinsic distribution of the R-band apparent magnitude M_{R} at the observed time 10^{3} seconds post trigger, which peaks at M_{R}=22.5 mag. The fraction of GRBs whose R-band magnitude is fainter than 22 mag, and 25 mag and at the observer time 10^3 seconds are ~63% and ~25%, respectively. The detection probabilities of the optical afterglows with ground-based robotic telescopes and UVOT onboard {Swift} are roughly consistent with that inferred from this intrinsic M_{R} distribution, indicating that the variations of the dark GRB fraction among the samples with different telescopes may be due to the observational selection effect, although the existence of an intrinsically dark GRB population cannot be ruled out.
description: 30 pages, 8 figures, ApJ in press
Hyla Horstockii Schlegel 1837
Creators: name: Miracle, Eulàlia Gassó
name: Van, Lars W.
name: Ostende, Den Hoek
name: Arntzen, Jan Willem
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hylidae
Hyla

description: Hyla Horstockii Schlegel, 1837
 Schlegel, 1837 -1844. Abbild. Neuer Unvollst. Amph., 1: 24. Current name: Hyperolius horstockii (Schlegel, 1837)
Lectotype: RMNH 1775, 1 spec. Loc.: “Vorgebirge der guten Hoffnung” [Cape of Good Hope, South Africa]. Leg.: H.B. van Horstok.
Paralectotypes: RMNH 10770, 2 spec. Loc.: “Vorgebirge der guten Hoffnung” [Cape of Good Hope, South Africa]. Leg.: H.B. van Horstok.
 Remarks. The lectotype was designated by Poynton (1963: 332). Though the publication date on the first page of Schlegel’s Abbildungen is 1837-1844, the work was issued in parts. See Stejneger’s Herpetology of Japan (1907: 540) for the publication dates.
description: Published as part of Miracle, Eulàlia Gassó, Van, Lars W., Ostende, Den Hoek & Arntzen, Jan Willem, 2007, Type specimens of amphibians in the National Museum of Natural History, Leiden, The Netherlands, pp. 25-68 in Zootaxa 1482 on pages 43-44, DOI: 10.5281/zenodo.176896
Antiferromagnetic to ferromagnetic phase transition as a transition to partial ordered spins. Application to $La_{1-x}Ca_xMnO_3$ in the doping range $x\geq 0.50$
Creators: name: Karchev, N.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetic state is a partial ordered state if only part of the electrons in the system give contribution to the magnetic order.
 We study Heisenberg model of two sublattice spin system, on the body-centered cubic lattice, with antiferromagnetic nearest neighbors exchange of sublattice A and B spins
 and two different ferromagnetic exchange constants for sublattice A ($J^A$) and B ($J^B$) spins. When $J^A>J^B$ the system undergoes transition from
 paramagnetism to ferromagnetism at Curie temperature $T_C$. Only the sublattice A spins give contribution to the magnetization of the system.
 Upon cooling, the system possesses ferromagnetism to antiferromagnetism transition at Néel temperature $T_N < T_C$.
 Below $T_N $ sublattice A and B electrons give contribution to the magnetization. The transition is a partial ordered transition.
 There is thermodynamic evidence for this transition in the magnetic specific heat of the system. As a function of temperature there are two maxima. At high temperature $T_C$ it is $λ$-type. At lower temperature $T_N$ it characterizes the transition from ferromagnetism to antiferromagnetism.
 As an example of ferromagnetism to antiferromagnetism partial ordered transition we consider the material $La_{1-x}Ca_xMnO_3$ in the doping range $x\geq 0.50$.
 Our calculations reproduce
 the experimental magnetization-temperature curve.
description: 30 pages, 10 figures
Geometry and linearly polarized cavity photon effects on the charge and spin currents of spin-orbit interacting electrons in a quantum ring
Creators: name: Arnold, Thorsten
name: Tang, Chi-Shung
name: Manolescu, Andrei
name: Gudmundsson, Vidar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the persistent spin current inside a quantum ring as a function of the strength of the Rashba or Dresselhaus spin-orbit interaction. We provide analytical results for the spin current of a one-dimensional (1D) ring of non-interacting electrons for comparison. Furthermore, we calculate the time evolution in the transient regime of a two-dimensional (2D) quantum ring connected to electrically biased semi-infinite leads using a time-convolutionless non-Markovian generalized master equation. In the latter case, the electrons are correlated via the Coulomb interaction and the ring can be embedded in a photon cavity with a single mode of linearly polarized photon field. The electron-electron and electron-photon interactions are described by exact numerical diagonalization. The photon field can be polarized perpendicular or parallel to the charge transport. We find a pronounced charge current dip associated with many-electron level crossings at the Aharonov-Casher phase $ΔΦ=π$, which can be disguised by linearly polarized light. Qualitative agreement is found for the spin currents of the 1D and 2D ring. Quantatively, however, the spin currents are weaker in the more realistic 2D ring, especially for weak spin-orbit interaction, but can be considerably enhanced with the aid of a linearly polarized electromagnetic field. Specific spin current symmetries relating the Dresselhaus spin-orbit interaction case to the Rashba one are found to hold for the 2D ring in the photon cavity.
Felis pardalis Linnaeus 1758
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora
Felidae
Felis
Felis pardalis

description: Felis pardalis Linnaeus, 1758. Syst. Nat., 10th ed., 1:42. TYPE LOCALITY: Mexico, Veracruz, Hernandez. DISTRIBUTION: E. Brazil, Paraguay, N. Argentina, and Peru, north to C. Arizona and Texas (U.S.A.). Arkansas (CPG). COMMENT: Leopardus is considered a valid genus by CPG. Type locality fixed by Thomas, 1911, Proc. Zool. Soc. Lond., 1911: 136. PROTECTED STATUS: CITES - Appendix II as Felidae. U.S. ESA - Endangered as F. pardalis. CITES - Appendix I as F. p. mearnsi subspecies only. CITES - Appendix I as F. p. mitis subspecies only. ISIS NUMBER: 5301412007001020000.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Carnivora, pp. 244-289 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 280, DOI: 10.5281/zenodo.7352980
Asymptotic dynamics of reflecting spiral waves
Creators: name: Langham, Jacob
name: Biktasheva, Irina
name: Barkley, Dwight
Publisher: name: arXiv
Year: 2014
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Resonantly forced spiral waves in excitable media drift in straight-line paths, their rotation centers behaving as point-like objects moving along trajectories with a constant velocity. Interaction with medium boundaries alters this velocity and may often result in a reflection of the drift trajectory. Such reflections have diverse characteristics and are known to be highly nonspecular in general. In this context we apply the theory of response functions, which via numerically computable integrals, reduces the reaction-diffusion equations governing the whole excitable medium to the dynamics of just the rotation center and rotation phase of a spiral wave. Spiral reflection trajectories are computed by this method for both small- and large-core spiral waves in the Barkley model. Such calculations provide insight into the process of reflection as well as explanations for differences in trajectories across parameters, including the effects of incidence angle and forcing amplitude. Qualitative aspects of these results are preserved far beyond the asymptotic limit of weak boundary effects and slow resonant drift.
description: 14 pages, 13 figures
2-Deoxyglucose selectively inhibits Fc and complement receptor-mediated phagocytosis in mouse peritoneal macrophages. I. Description of the inhibitory effect
Creators: name: Michl, Josef
name: Ohlbaum, Diane J.
name: Silverstein, Samuel C.
Publisher: name: Columbia University
Year: 1976
Subjects: subject: Macrophages
subject: Enzyme inhibitors
subject: Phagocytosis
subject: Cytology
subject: Microbiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Incubation of normal or thioglycollate-elicited mouse peritoneal macrophages with 2-deoxy-D-glucose (2-dG) inhibits the capacity of these macrophages to phagocytize IgG- or complement-coated particles via their Fc and C3 receptors. 2-dG has no inhibitory effect on the capacity of these macrophages to phagocytize latex or zymosan particles, which are ingested in the absence of specific opsonins, and it does not inhibit binding of IgG- or C3-coated particles to their respective receptors on the macrophage's plasma membrane. 2-dG exerts its inhibitory effect on the macrophage and not on the opsonized particle. The inhibition is independent of particle size, occurs within 15-30 min of addition of this glucose analogue to the medium at 37 degrees C, cannot be overcome by supra-agglutinating amounts of opsonizing antibody, and is completely reversible by substitution of 5.5 mM glucose for 50 mM 2-dG in the medium. Addition of equimolar amounts of glucose or mannose, but not of fructose, galactose, fucose, or glucosamine, to medium containing 50 mM 2-dG results in substantial reversal of the inhibitory effect of 2-dG on Fc and C3 receptor mediated phagocytosis.
The Zeldovich approximation
Creators: name: White, Martin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This year marks the 100th anniversary of the birth of Yakov Zel'dovich. Amongst his many legacies is the Zel'dovich approximation for the growth of large-scale structure, which remains one of the most successful and insightful analytic models of structure formation. We use the Zel'dovich approximation to compute the two-point function of the matter and biased tracers, and compare to the results of N-body simulations and other Lagrangian perturbation theories. We show that Lagrangian perturbation theories converge well and that the Zel'dovich approximation provides a good fit to the N-body results except for the quadrupole moment of the halo correlation function. We extend the calculation of halo bias to 3rd order and also consider non-local biasing schemes, none of which remove the discrepancy. We argue that a part of the discrepancy owes to an incorrect prediction of inter-halo velocity correlations. We use the Zel'dovich approximation to compute the ingredients of the Gaussian streaming model and show that this hybrid method provides a good fit to clustering of halos in redshift space down to scales of tens of Mpc.
description: 11 pages, 7 figures. Minor modifications to match version accepted by MNRAS. Erratum added to shear equations in Appendix, no conclusions changed
Sausage Mode Propagation in a Thick Magnetic Flux Tube
Creators: name: Pardi, Anabele-Linda
name: Ballai, Istvan
name: Marcu, Alexandru
name: Orza, Beniamin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The aim of this paper is to model the propagation of slow magnetohydrodynamic (MHD) sausage waves in a thick expanding magnetic flux tube in the context of the quiescent (VAL C) solar atmosphere. The propagation of these waves is found to be described by the Klein-Gordon equation. Using the governing MHD equations and the VAL C atmosphere model we study the variation of the cut-off frequency along and across the magnetic tube guiding the waves. Due to the radial variation of the cut-off frequency the flux tubes act as low frequency filters for waves.
Felis planiceps Vigors and Horsfield 1827
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Carnivora
Felidae
Felis
Felis planiceps

description: Felis planiceps Vigors and Horsfield, 1827. Zool. J., 3:449. TYPE LOCALITY: Indonesia, Sumatra. DISTRIBUTION: Peninsular Thailand; Malaya; Sumatra; Borneo. PROTECTED STATUS: CITES - Appendix I and U.S. ESA - Endangered. ISIS NUMBER: 5301412007001022001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Carnivora, pp. 244-289 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 280, DOI: 10.5281/zenodo.7352980
Studies on the mechanism of phagocytosis. I. Requirements for circumferential attachment of particle-bound ligands to specific receptors on the macrophage plasma membrane
Creators: name: Griffin Jr., Frank M.
name: Griffin, Johanna A.
name: Leider, Judith E.
name: Silverstein, Samuel C.
Publisher: name: Columbia University
Year: 1975
Subjects: subject: Cell receptors
subject: Receptor-ligand complexes
subject: Macrophages
subject: Phagocytosis
subject: Cytology
subject: Microbiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: These experiments were designed to evaluate the role of macrophage plasma membrane receptors for the third component of complement (C) and for the Fc portion of IgG in the ingestion phase of phagocytosis. Sheep erythrocyte (E) were coated with anti-E IgG [E(IgG)]; these E(IgG) were then attached to cultivated monolayers of mouse peritoneal macrophages under conditions which reversibly inhibit ingestion of E(IgG). The E(IgG)-macrophage complexes were further incubated under similar conditions with an antimacrophage IgG fraction which blocks Fc receptor-mediated ingestion but has no effect upon ingestion mediated by other phagocytic receptors. When these cultures were subsequently incubated under conditions optimal for particle ingestion, phagocytosis of the IgG-coated erythrocytes did not occur; the erythrocytes remained bound to the Fc receptors of the macrophage plasma membrane. To determine whether ligands must cover the entire surface of an attached particle to permit ingestion of that particle, C-coated E [E(IgM)C] were bound to the C receptors of thioglycollate-induced (activated) macrophages at 4 degrees C. E(IgM)C-macrophage complexes were then trypsinized at 4 degrees C, a procedure which resulted in cleavage of erythrocyte-bound C3b molecules to a form of C3 not recognized by the macrophage receptors for C3b. Under the conditions used, trypsin did not affect the attachment of E(IgM)C to the macrophage surface or the macrophage receptors for C3b. When these trypsin treated E(IgM)C-macrophage complexes were incubated at 37 degrees C, the bound E(IgM)C were not ingested; the erythrocytes remained attached to the macrophage plasma membrane via the macrophage's C receptors. These results indicate that attachment of a particle to specific receptors on the macrophage plasma membrane is not sufficient to trigger ingestion of that particle. Rather, ingestion requires the sequential, circumferential interaction of particle-bound ligands with specific plasma membrane receptors not involved in the initial attachment process.
title: Strategic Effect of Degree of Operating Leverage on Value Premium of Lodging Firms
Creators: name: Pawar, Akshaya
name: Gholap, Raju
name: Sheel, Atul
Publisher: name: University of Massachusetts Amherst
Year: 2019

description: The potential association between a firm’s strategic use of its degree of operating leverage (DOL) and its value premium has been a subject of considerable interest and debate among researchers in the past (Carlson, Fisher, & Giammarino, 2004; Garcia-Feijoo & Jorgensen, 2010). Existent finance literature also discusses the trade-off between DOL and degree of financial leverage (DFL) (Dugan & Shriver, 1992; Mandelker & Rhee, 1984). While most researchers focus on cross-sectional research in this area, Huffman (1989) further documented variation in the DOL and DFL across industries. The lodging sector of the hospitality industry is unique in many ways (Lee and Jang, 2007; Madan, 2007; Singal, 2015). This paper evaluates the impact of DOL on the value premium of lodging firms, the trade-off between DOL and DFL in these firms, and how this important lever can be used by manage- ment to make strategic business decisions.
Smoothed Low Rank and Sparse Matrix Recovery by Iteratively Reweighted Least Squares Minimization
Creators: name: Lu, Canyi
name: Lin, Zhouchen
name: Yan, Shuicheng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This work presents a general framework for solving the low rank and/or sparse matrix minimization problems, which may involve multiple non-smooth terms. The Iteratively Reweighted Least Squares (IRLS) method is a fast solver, which smooths the objective function and minimizes it by alternately updating the variables and their weights. However, the traditional IRLS can only solve a sparse only or low rank only minimization problem with squared loss or an affine constraint. This work generalizes IRLS to solve joint/mixed low rank and sparse minimization problems, which are essential formulations for many tasks. As a concrete example, we solve the Schatten-$p$ norm and $\ell_{2,q}$-norm regularized Low-Rank Representation (LRR) problem by IRLS, and theoretically prove that the derived solution is a stationary point (globally optimal if $p,q\geq1$). Our convergence proof of IRLS is more general than previous one which depends on the special properties of the Schatten-$p$ norm and $\ell_{2,q}$-norm. Extensive experiments on both synthetic and real data sets demonstrate that our IRLS is much more efficient.
description: IEEE Transactions on Image Processing 2015
Studies on the mechanism of phagocytosis. II. The interaction of macrophages with anti-immunoglobulin IgG-coated bone marrow-derived lymphocytes
Creators: name: Griffin Jr., Frank M.
name: Griffin, Johanna A.
name: Silverstein, Samuel C.
Publisher: name: Columbia University
Year: 1976
Subjects: subject: Phagocytosis
subject: Anti-immunoglobulin autoantibodies
subject: Lymphocytes
subject: Cytology
subject: Microbiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: We have examined the effect of the distribution of anti-immunoglobulin IgG molecules on the surface of bone marrow-derived lymphocytes upon the interaction of these cells with macrophages. Lymphocytes which were diffusely coated with antibodies to surface immunoglogulin were ingested by macrophages. Lymphocytes which had the same number of anti-immunoglobulin IgG molecules redistributed to one pole of the surface bound to the macrophages' Fc receptors but were not ingested. These results confirm our previous hypothesis that ingestion of an immunologically coated particle requires the sequential, circumferential binding of specific receptors on the plasma membrane of a phagocytic cell to immunologic ligands distributed over the entire particle surface. Macrophages which had bound capped lymphocytes by the macrophages' Fc receptors removed the immune complex caps from the lymphocyte surface without destroying the lymphocytes. These lymphocytes remained attached to the macrophage surface. The finding that macrophages can phagocytize immune complexes from the surface of a cell without destroying the cell to which these complexes are attached may be important in understanding the effects of antigens and antibodies on cells participating in a humoral immune response, in identifying the mechanisms by which chronic viral infections are established, and in defining the roles of blocking antibodies in tumor immunity.
title: Dynamics of Learning Orientation, Innovativeness, and Financial Performance of the Hotel Industry
Creators: name: Nair, Girish K.
Publisher: name: University of Massachusetts Amherst
Year: 2019

description: This paper investigates the moderating influence of firm innovativeness between learning orienta- tion and financial performance in the context of the hotel industry in Qatar. Quantitative research was the approach using Structural Equation Modeling with Partial Least Square Technique. A questionnaire-based survey was undertaken with 165 financial managers of different hotels in Qatar. The findings show that commitment to learning has significant influence on product innovation; shared vision has significant influence on process innovation; intra-organization knowledge shar- ing has influence on product, process, and business system innovation; and open-mindedness to learning has influence on business system innovation. Furthermore, firm innovativeness was also found to have an independent positive effect on financial performance. These findings have led to the development of the implications to the strategic and financial managers of the hotel industry to improve their financial performance.
An 8 hour characteristic time-scale in submillimetre light curves of Sagittarius A*
Creators: name: Dexter, Jason
name: Kelly, Brandon
name: Bower, Geoffrey C.
name: Marrone, Daniel P.
name: Stone, Jordan
name: Plambeck, Richard
name: Doeleman, Sheperd S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We compile and analyse long term (~10 year) submillimetre (1.3, 0.87, 0.43 mm, submm) wavelength light curves of the Galactic centre black hole, Sagittarius A*. The 0.87 and 0.43 mm data are taken from the literature, while the majority of the 1.3 mm light curve is from previously unpublished SMA and CARMA data. We use Monte Carlo simulations to show that on minute to few hour time-scales the variability is consistent with a red noise process with a 230 GHz power spectrum slope of 2.3+0.8-0.6 at 95% confidence. The light curve is de-correlated (white noise) on very long (month to year) times. In order to identify the transition time between red and white noise, we model the light curves as a stochastic damped random walk process. The models allow a quantitative estimate of this physical characteristic time-scale of 8-4+3 hours at 230 GHz at 95% confidence, with consistent results at 345 and 690 GHz. This corresponds to ~10 orbital times or ~1 inflow (viscous) time at R = 3 Rs, a typical radius producing the 230 GHz emission as measured by very long baseline interferometry and found in theoretical accretion flow and jet models. This time-scale is significantly shorter (longer) than those measured at radio (near-infrared, NIR) wavelengths, and is marginally inconsistent with the same variability mechanism operating in the submm and NIR for the expected t ~ R^3/2 scaling. It is crudely consistent with the analogous time-scale inferred in studies of quasar optical light curves after accounting for the difference in emission radius. We find evidence that the submm variability persists at least down to the ISCO, if not the event horizon. These results can be compared quantitatively with similar analyses at different wavebands to test for connections between the variability mechanisms, and with light curves from theoretical models of accreting black holes.
description: 12 pages, 9 figures, submitted to MNRAS 6/2013
Exploring Engagement and Perceived Learning Outcomes in an Immersive Flipped Learning Context
Creators: name: Alizadeh, Mehrasa
Publisher: name: arXiv
Year: 2024
Subjects: subject: Physics Education (physics.ed-ph)
subject: Computers and Society (cs.CY)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The flipped classroom model has been widely acknowledged as a practical pedagogical approach to enhancing student engagement and learning. However, it faces challenges such as improving student interaction with learning content and peers, particularly in Japanese universities where digital technologies are not always fully utilized. To address these challenges and identify potential solutions, a case study was conducted in which an online flipped course on academic skills was developed and implemented in an immersive virtual environment. The primary objective during this initial phase was not to establish a causal relationship between the use of immersive flipped learning and students' engagement and perceived learning outcomes. Instead, this initiative aimed to explore the benefits and challenges of the immersive flipped learning approach in relation to students' online engagement and their perceived learning outcomes. Following a mixed-methods research approach, quantitative and qualitative data were collected through a survey (N=50) and students' reflective reports (N=80). The study revealed high levels of student engagement and perceived learning outcomes, although it also identified areas needing improvement, particularly in supporting student interactions in the target language. Despite the exploratory nature of this study, the findings suggest that a well-designed flipped learning approach, set in an engaging immersive environment, can significantly enhance student engagement, thereby supporting the learning process. When creating an immersive flipped learning course, educators should incorporate best practices from the literature on both flipped learning and immersive learning design to ensure optimal learning outcomes. The findings of this study can serve as a valuable resource for educators seeking to design engaging and effective remote learning experiences.
description: 14 pages
title: Managerial Efficiency in the Food and Beverage Industry in Taiwan
Creators: name: Hu, Jin-Li
name: Chiu, Chia-Ning
name: Chu, Hou-Tang
Publisher: name: University of Massachusetts Amherst
Year: 2019

description: This study evaluates the managerial efficiency of food and beverage companies by employing the output-oriented data envelopment analysis (DEA) approach. Consequently, the input and output variables of ten Taiwanese listed food and beverage companies were collected from 2011 to 2014. Then the Mann-Whitney U test was used to examine the difference in efficiency between restaurant companies and beverage and dessert companies. The major findings are as follows: (1) An inverse relationship exists between the scale and managerial efficiencies of the food and beverage industry. (2) The Mann-Whitney U test shows that the beverage and dessert companies are statistically more efficient. The results not only offer different managerial insights into the food and beverage industry’s operating efficiency but also determine which factors have a significant and direct impact on these restaurants’ or beverage and dessert shops’ success or failure, which is the considerable contribution of this study for the service industry.
Universality of random graphs for graphs of maximum degree two
Creators: name: Kim, Jeong Han
name: Lee, Sang June
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C80, 05C60

description: For a family $\mathcal{F}$ of graphs, a graph $G$ is called \emph{$\mathcal{F}$-universal} if $G$ contains every graph in $\mathcal{F}$ as a subgraph. Let $\mathcal{F}_n(d)$ be the family of all graphs on $n$ vertices with maximum degree at most $d$. Dellamonica, Kohayakawa, Rödl and Ruciński showed that, for $d\geq 3$, the random graph $G(n,p)$ is $\mathcal{F}_n(d)$-universal with high probability provided $p\geq C\big(\frac{\log n}{n}\big)^{1/d}$ for a sufficiently large constant $C=C(d)$. In this paper we prove the missing part of the result, that is, the random graph $G(n,p)$ is $\mathcal{F}_n(2)$-universal with high probability provided $p\geq C\big(\frac{\log n}{n}\big)^{1/2}$ for a sufficiently large constant $C$.
description: 13 pages, 1 figure