cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the extraction of electromagnetic properties of the Delta(1232) excitation from pion photoproduction
Creators: name: Wilbois, Th.
name: Wilhelm, P.
name: Arenhoevel, H.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Several methods for the treatment of pion photoproduction in the region of the Delta(1232) resonance are discussed, in particular the effective Lagrangian approach and the speed plot analysis are compared to a dynamical treatment. As a main topic, we discuss the extraction of the genuine resonance parts of the magnetic dipole and electric quadrupole multipoles of the electromagnetic excitation of the resonance. To this end, we try to relate the various values for the ratio R_{EM} of the E2 to M1 multipole excitation strengths for the Delta(1232) resonance as extracted by the different methods to corresponding ratios of a dynamical model. Moreover, it is confirmed that all methods for extracting resonance properties suffer from an unitary ambiguity which is due to some phenomenological contributions entering the models.
description: 22 pages revtex including 7 postscript figures
Remote Biofeedback Sharing, Opportunities and Challenges
Creators: name: Frey, Jérémy
name: Cauchard, Jessica
Publisher: name: arXiv
Year: 2018
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Biofeedback is commonly used to regulate one's state, for example to manage stress. The underlying idea is that by perceiving a feedback about their physiological activity, a user can act upon it. In this paper we describe through two recent projects how biofeedback could be leveraged to share one's state at distance. Such extension of biofeedback could answer to the need of belonging, further widening the applications of the technology in terms of well-being.
description: WellComp - UbiComp/ISWC'18 Adjunct, Oct 2018, Singapore, Singapore. http://ubicomp.org/ubicomp2018/
Heavy Quasiparticles in the Anderson Lattice Model
Creators: name: Tsutsui, K.
name: Ohta, Y.
name: Eder, R.
name: Maekawa, S.
name: Dagotto, E.
name: Riera, J.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: An exact-diagonalization technique on small clusters is used to study the dynamics of the one-dimensional symmetric Anderson lattice model. Our calculated excitation spectra reproduce key features expected for an infinite Kondo lattice such as nearly localized low-energy spin excitations and extended regions of `heavy-quasiparticle' bands. We show that, in contrast to the hybridization picture, low-energy spin excitations of the nearly-localized $f$-electron system play a key role in the formation of an almost dispersionless low-energy band of heavy quasiparticles.
description: RevTex. Figures available upon request. To appear in PRL
Additional file 1: of Prognostic significance of sealed-off perforation in colon cancer: a prospective cohort study
Creators: name: Kil-Yong Lee
name: Park, Ji
name: Inho Song
name: Lee, Ki-Young
name: Sangsik Cho
name: Yoon-Hye Kwon
name: Kim, Min
name: Seung-Bum Ryoo
name: Seung-Yong Jeong
name: Park, Kyu
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Pharmacology
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Cancer

description: Table S1 Clinicopathologic characteristics after propensity score matching. Table S2 Risk factors associated with cancer progression after propensity score matching. Table S3 Risk factors for overall survival after propensity score matching. (DOCX 21 kb)
Pheidole scapulata
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole scapulata

description: Pheidole scapulata Santschi
Pheidole scapulata Santschi 1923d: 63.
Types Naturhist. Mus. Basel.
Etymology L scapula, pertaining to the shoulder, allusion unknown.
Diagnosis Closest to monstrosa and reclusi, distinguished from these and other members of the distorta group as follows. Major: entire dorsum of head to the level of the posterior clypeal border of the clypeus completely and densely rugoreticulate; upper fourth of side of head longitudinally carinulate; all but anterior strip of premesonotal dorsum, and all of dorsa of petiolar and postpetiolar nodes rugoreticulate.
Minor: humerus in oblique-dorsal view right-angulate; head heavily sculptured, with extensive rugoreticulum mesad and posterior to eyes; mesonotal dorsum rugoreticulate.
Measurements (mm) Major (Tucuman, Argentina)): HW 1.62, HL 1.98, SL 0.74, EL 0.24, PW 1.06.
Lectotype minor: HW 0.80, HL 0.78, SL 0.62, EL 0.16, PW 0.52.
Color Major: medium reddish brown (possibly a callow) to dark brown.
Minor: concolorous medium brown except for gaster, which is dark brown.
Range Cordoba, Salta, and Tucuman in Argentina; and Santa Cruz in Bolivia.
Biology Unknown.
Figure Upper: major (associated with minor compared with lectotype minor), Tucuman, Argentina. Lower: lectotype, minor, Alta Gracia, Cordoba, Argentina. Scale bars = 1 mm.
description: Published as part of Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA :Harvard University Press on page 257
Gamifying the Escape from the Engineering Method Prison - An Innovative Board Game to Teach the Essence Theory to Future Project Managers and Software Engineers
Creators: name: Kemell, Kai-Kristian
name: Risku, Juhani
name: Evensen, Arthur
name: Abrahamsson, Pekka
name: Dahl, Aleksander Madsen
name: Grytten, Lars Henrik
name: Jedryszek, Agata
name: Rostrup, Petter
name: Nguyen-Duc, Anh
Publisher: name: arXiv
Year: 2018
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Software Engineering is an engineering discipline but lacks a solid theoretical foundation. One effort in remedying this situation has been the SEMAT Essence specification. Essence consists of a language for modeling Software Engineering (SE) practices and methods and a kernel containing what its authors describe as being elements that are present in every software development project. In practice, it is a method agnostic project management tool for SE Projects. Using the language of the specification, Essence can be used to model any software development method or practice. Thus, the specification can potentially be applied to any software development context, making it a powerful tool. However, due to the manual work and the learning process involved in modeling practices with Essence, its initial adoption can be tasking for development teams. Due to the importance of project management in SE projects, new project management tools such as Essence are valuable, and facilitating their adoption is consequently important. To tackle this issue in the case of Essence, we present a game-based approach to teaching the use Essence. In this paper, we gamify the learning process by means of an innovative board game. The game is empirically validated in a study involving students from the IT faculty of University of Jyväskylä (n=61). Based on the results, we report the effectiveness of the game-based approach to teaching both Essence and SE project work.
description: This is the author's version of the work. The copyright holder's version can be found at https://dx.doi.org/10.1109/ICE.2018.8436340, 2018 IEEE International Conference on Engineering, Technology and Innovation (ICE/ITMC), Stuttgart, 2018
Double Asymptotic Scaling in Drell-Yan Processes
Creators: name: Basu, Rahul
name: Gupta, Sourendu
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Double scaling may be observed in the Drell-Yan process at the Tevatron and in the ALICE detector at the Large Hadron Collider in a window of masses. In the double scaling limit of the cross section, the higher order QCD corrections are quite large, and are driven by the rise in gluon densities in the double scaling regime. The naive parton model cannot be valid even at asymptotic energies in the region of phase space where double scaling holds.
description: latex, 7 pages, 3 figures (included), one extra figure and a few explanatory remarks added. This is the published version
SO(10) GUT and Quark-Lepton Mass Matrices
Creators: name: Matsuda, K.
name: Nishiura, H.
name: Fukuyama, T.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The phenomenological model that all quark and lepton mass matrices have the same zero texture, namely their (1,1), (1,3) and (3,1) components are zeros, is discussed in the context of SO(10) Grand Unified Theories (GUTs). The mass matrices of type I for quarks are consistent with the experimental data in the quark sector. For the lepton sector, consistent fitting to the data of neutrino oscillation experiments force us to use the mass matrix for the charged leptons which is slightly deviated from type I. Given quark masses and charged lepton masses, the model includes 19 free parameters, whereas the SO(10) GUTs gives 16 constrained equations. Changing the remaining three parameters freely, we can fit all the entries of the CKM quark mixing matrix and the MNS lepton mixing matrix, and three neutrino masses consistently with the present experimental data.
description: 32pp, REV TeX, 12 EPS Figures
Covering n-Permutations with (n+1)-Permutations
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013

description: Let $S_n$ be the set of all permutations on $[n]:=\{1,2,\ldots,n\}$. We denote by $\kappa_n$ the smallest cardinality of a subset ${\cal A}$ of $S_{n+1}$ that "covers" $S_n$, in the sense that each $\pi\in S_n$ may be found as an order-isomorphic subsequence of some $\pi'$ in ${\cal A}$. What are general upper bounds on $\kappa_n$? If we randomly select $\nu_n$ elements of $S_{n+1}$, when does the probability that they cover $S_n$ transition from 0 to 1? Can we provide a fine-magnification analysis that provides the "probability of coverage" when $\nu_n$ is around the level given by the phase transition? In this paper we answer these questions and raise others.
Analysis of Pion Photoproduction over the Delta Resonance Region
Creators: name: Arndt, R. A.
name: Strakovsky, I. I.
name: Workman, R. L.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A number of recent multipole analyses from Mainz, RPI, BNL and Virginia Tech (VPI) have focused on the first resonance region. One goal common to these studies was an improved set of Delta(1232) photo-decay amplitudes. There has been considerable debate over the differing results found for A(1/2), A(3/2) and the E2/M1 ratio. We show that a much more consistent set of values is possible if differences in the database are considered.
description: 5 pages of text. Invited talk at the 7th Int. Symposium on Meson-Nucleon Physics and the Structure of the Nucleon
The Green Paradox of U.S. Biofuel Subsidies: Impact on Greenhouse Gas Emissions
Creators: name: Brown, Stephen P. A.
name: Allaire, Maura
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: This paper presents the first comprehensive estimates of the impact of U.S. biofuel subsidies on greenhouse gas emissions. Although U.S. support for biofuels is large and growing, the associated impact on greenhouse gas emissions remains unclear. The effect of biofuel subsidies on emissions is determined by the relative magnitudes of countervailing substitution and price effects. Regulators typically ignore the price effect of biofuel policies, and therefore do not fully account for market and climate impacts. We develop an economic simulation model of U.S. energy markets to estimate the impact of biofuel subsidies on greenhouse gas emissions from 2005 through 2009. The model represents end-use consumption of oil, natural gas, coal and electricity in four sectors. We find that the subsidies for ethanol increased greenhouse gas emissions, while those for biodiesel have an ambiguous effect. Thus, ethanol subsidies create a green paradox. Although ethanol has lower lifecycle greenhouse gas emissions than gasoline, the subsidies lower the market price of blended fuel, which increases overall fuel consumption and increase total greenhouse gas emissions. These findings question the suitability of using ethanol subsidies to achieve climate goals and highlight the importance of accounting for the price effect of biofuel policies.
Analysis of ε'/εin the 1/N_c Expansion
Creators: name: Hambye, T.
name: Koehler, G. O.
name: Paschos, E. A.
name: Soldan, P. H.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new analysis of the ratio ε'/εwhich measures the direct CP violation in K\toππdecays. We use the 1/N_c expansion within the framework of the effective chiral lagrangian for pseudoscalar mesons. The 1/N_c corrections to the hadronic matrix elements of all operators are calculated at leading order in the chiral expansion. Numerically, doing a simple scanning of the input parameters we find 1.5 \cdot 10^{-4}\leq ε'/ε\leq 31.6\cdot 10^{-4}. We also investigate, in the chiral limit, the 1/N_c corrections to the operator Q_6 at next-to-leading order in the chiral expansion. We find large positive corrections which can further enhance ε'/εand bring the standard model prediction close to the measured value for central values of the parameters. Our result indicates that a ΔI=1/2 enhancement may be operative for Q_6 similar to the one of Q_1 and Q_2 which dominate the CP conserving amplitude.
description: 49 pages, 10 figures. Minor changes in wording, references corrected. To appear in Nuclear Physics B
Bi-layer Heisenberg model studied by the Schwinger-boson Gutzwiller-projection method
Creators: name: Miyazaki, T.
name: Nakamura, I.
name: Yoshioka, D.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: A two-dimensional bi-layer, square lattice Heisenberg model with different intraplane($J_{\parallel}$) and interplane($J_{\perp}$) couplings is investigated. The model is first solved in the Schwinger boson mean-field approximation. %It is shown that order-disorder transition occurs as the interplane Coupling %is increased. The critical ratio is $J_{\perp/\p=4.48J$ Then the solution is Gutzwiller projected to satisfy the local constraint that there should be only one boson at each site. For these wave functions, we perform variational Monte Carlo simulation up to $24 \times 24 \times 2$ sites. It is shown that the Néel order is destroyed as the interplane coupling is increased. The obtained critical value, $J_{\perp}/J_{\parallel}=3.51$, is smaller than that by the mean-field theory. Excitation spectrum is calculated by a single mode approximation. It is shown that energy gap develops once the Néel order is destroyed.
description: 19 pages(including figure captions) RevTex3.0, 10 figures, available upon request
Mouse embryos in culture: models for understanding diabetes-induced embryopathies and gene function.
Creators: name: Sadler, T W
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1997

description: Both the metabolic studies on diabetes and the genetic studies using antisense oligodeoxynucleotides clearly demonstrate the importance and usefulness of rodent whole embryo culture. Without this technique, these studies would be impossible and, consequently, our knowledge of both normal and abnormal development would not be as advanced as it is today. The culture system fills a unique niche in studies in the fields of developmental biology and teratology and these sciences would have been less well served without Dr. New's contribution.
Estimating the nuclear level density with the Monte Carlo shell model
Creators: name: Ormand, W. E.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A method for making realistic estimates of the density of levels in even-even nuclei is presented making use of the Monte Carlo shell model (MCSM). The procedure follows three basic steps: (1) computation of the thermal energy with the MCSM, (2) evaluation of the partition function by integrating the thermal energy, and (3) evaluating the level density by performing the inverse Laplace transform of the partition function using Maximum Entropy reconstruction techniques. It is found that results obtained with schematic interactions, which do not have a sign problem in the MCSM, compare well with realistic shell-model interactions provided an important isospin dependence is accounted for.
description: 14 pages, 3 postscript figures. Latex with RevTex. Submitted as a rapid communication to Phys. Rev. C
The CNS midline cells and spitz class genes are required for proper patterning of Drosophila ventral neuroectoderm
Creators: name: Crews, STEPHEN T
name: Lee, CM
name: Yu, DS
name: Kim, SH
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999

description: The Drosophila embryonic central nervous system (CNS) develops from sets of neuroblasts (NBs) which segregate from the ventral neuroectoderm during early embryogenesis. It is not well established how each individual NB in the neuroectoderm acquires its characteristic identity along the dorsal-ventral axis. Since it is known that CNS midline cells and spitz class genes (pointed, rhomboid, single-minded, spitz and Star) are required for the proper patterning of ventral CNS and epidermis originated from the ventral neuroectoderm, this study was carried out to determine the functional roles of the CNS midline cells and spitz class genes in the fate determination of ventral NBs and formation of mature neurons and their axon pathways. Several molecular markers for the identified NBs, neurons, and axon pathways were employed to examine marker gene expression profile, cell lineage and axon pathway formation in the spitz class mutants. This analysis showed that the CNS midline cells specified by single-minded gene as well as spitz class genes are required for identity determination of a subset of ventral NBs and for formation of mature neurons and their axon pathways. This study suggests that the CNS midline cells and spitz class genes are necessary for proper patterning of the ventral neuroectoderm along the dorsal-ventral axis.
Calculation of the Electron Self Energy for Low Nuclear Charge
Creators: name: Jentschura, U. D.
name: Mohr, P. J.
name: Soff, G.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a nonperturbative numerical evaluation of the one-photon electron self energy for hydrogenlike ions with low nuclear charge numbers Z=1 to 5. Our calculation for the 1S state has a numerical uncertainty of 0.8 Hz for hydrogen and 13 Hz for singly-ionized helium. Resummation and convergence acceleration techniques that reduce the computer time by about three orders of magnitude were employed in the calculation. The numerical results are compared to results based on known terms in the expansion of the self energy in powers of (Z alpha).
description: 10 pages, RevTeX, 2 figures
Pheidole aberrans Mayr
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole aberrans

description: Pheidole aberrans Mayr
Pheidole aberrans Mayr 1868b: 172. Syn.: Pheidole aberrans var. diversiceps Santschi 1916e: 374, n. syn.; Pheidole (Elasmopheidole) aberrans var. fartilia Forel 1913m: 233, n. syn.; Pheidole aberrans var. mutica Emery 1906c: 142, n. syn. Raised to species level in this monograph: minensis, obscurifrons, weiseri.
Types Naturhist. Mus. Wien.
etymology L aberrans, wandering, astray, with possible reference to unusual major head.
Diagnosis A member of the aberrans group, closest to cavifrons, longior, and obnixa, distinguished as follows.
Major: frontal lobes seen from above bilaterally symmetrical, coming to a point an Eye Length from the anterior clypeal border; all of dorsal surface of head carinulate, except for a broad space posterior to the demarcating occipital carina; all pre-carina carinulae turn away (laterad) as they approach the carina; pronotum in dorsal-oblique view very high above smaller but well-developed mesonotal convexity, and semicircular in outline; hypostoma 2-toothed; propodeal spines well developed.
Minor: promesonotal dorsum covered with semicircular carinulae; posterior dorsal surface of head smooth or partially carinulate; propodeal spines well developed.
Measurements (mm) Major (Tucuman): HW 1.40, HL 1.64, SL 0.56, EL 0.14, PW 0.86. Minor (Tucuman): HW 0.68, HL 0.70, SL 0.46, EL 0.10, PW 0.44.
color Major: light reddish brown except for clypeus and edges of frontal lobes, which are plain medium brown.
Range Recorded by Kempf (1972b) from Buenos Aires and San Luis provinces of Argentina north to Goias and Pernambuco states in central Brazil. It has also been collected near Cuzco in Peru, and near Cochabamba, Bolivia (MCZ).
biology Bruch (1916) describes typical nests of aberrans in San Luis Province, Argentina, as excavated in open ground, comprising a single conspicuous hole, surrounded by a ring of excavated soil, and leading to a succession of flat-bottomed chambers about 5 cm across and up to 2 cm high, which are connected by vertical galleries. Trager (unpublished specimen data) has collected aberrans in cactus scrub, overgrazed pasture, a residential backyard, and on roadsides.
figure Upper: major. Lower: minor. ARGENTINA: Tucuman (N. Kusnezov). (Type locality: Buenos Aires, Argentina; P. de Strobel). Scale bars = 1 mm.
description: Published as part of Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA :Harvard University Press on page 131
Additional file 1: of Quantification of liver iron overload disease with laser ablation inductively coupled plasma mass spectrometry
Creators: name: Kim, Philipp
name: Weiskirchen, Sabine
name: Uerlings, Ricarda
name: Kueppers, Astrid
name: Stellmacher, Florian
name: AndrĂŠ Viveiros
name: Zoller, Heinz
name: Weiskirchen, Ralf
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified

description: Table S1. Operating parameters of LA-ICP-MS imaging of human liver samples. (DOC 45â kb)
Spontaneous Breaking of Flavor Symmetry and Naturalness of Nearly Degenerate Neutrino Masses and Bi-maximal Mixing
Creators: name: Wu, Yue-Liang
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The gauge model with $SO(3)_{F}$ flavor symmetry and three Higgs triplets is studied. We show how the intriguing nearly degenerate neutrino mass and bi-maximal mixing scenario comes out naturally after spontaneous breaking of the symmetry. The hierarchy between the neutrino mass-squared differences, which is needed for reconciling both solar and atmospheric neutrino data, is naturally resulted from an approximate permutation symmetry. The model can also lead to interesting phenomena on lepton-flavor violations via the $SO(3)_{F}$ gauge interactions.
description: 13 pages, latex, no figures, the version appearing in SCIENCE IN CHINA (Series A), Vol.35 No.9 (2000)
PhaseStain: Digital staining of label-free quantitative phase microscopy images using deep learning
Creators: name: Rivenson, Yair
name: Liu, Tairan
name: Wei, Zhensong
name: Zhang, Yibo
name: Ozcan, Aydogan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Medical Physics (physics.med-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: I.2; I.2.1; I.2.6; I.2.10; I.3; I.3.3; I.4.3; I.4.4; I.4.9; J.3
subject: 68T01, 68T05, 68U10, 62M45, 78M32, 92C50, 92C55, 94A08

description: Using a deep neural network, we demonstrate a digital staining technique, which we term PhaseStain, to transform quantitative phase images (QPI) of labelfree tissue sections into images that are equivalent to brightfield microscopy images of the same samples that are histochemically stained. Through pairs of image data (QPI and the corresponding brightfield images, acquired after staining) we train a generative adversarial network (GAN) and demonstrate the effectiveness of this virtual staining approach using sections of human skin, kidney and liver tissue, matching the brightfield microscopy images of the same samples stained with Hematoxylin and Eosin, Jones' stain, and Masson's trichrome stain, respectively. This digital staining framework might further strengthen various uses of labelfree QPI techniques in pathology applications and biomedical research in general, by eliminating the need for chemical staining, reducing sample preparation related costs and saving time. Our results provide a powerful example of some of the unique opportunities created by data driven image transformations enabled by deep learning.
Energy Dependence of Breakup Cross Sections of Halo Nucleus 8B and Effective Interactions
Creators: name: Bertulani, C. A.
name: Lotti, P.
name: Sagawa, H.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the energy dependence of the cross sections for nucleon removal of 8B projectiles. It is shown that the Glauber model calculations with nucleon-nucleon t-matrix reproduce well the energy dependence of the breakup cross sections of 8B. A DWBA model for the breakup cross section is also proposed and results are compared with those of the Glauber model. We show that to obtain an agreement between the DWBA calculations, the Glauber formalism, and the experimental data, it is necessary to modify the energy behavior of the effective interaction. In particular, the breakup potential has a quite different energy dependence than the strong absorption potential.
description: 13 pages, 4 figures
Influence of load cycling on marginal microleakage with two self-etching and two one-bottle dentin adhesive systems in dentin
Creators: name: Ritter, André Vicente
name: Mitsui, Fabio Hiroyuki Ogata
name: Cardoso, Paulo Eduardo Capel
name: Bedran-de-Castro, Ana Karina Barbieri
name: Pimenta, Luiz André Freire
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003

description: PURPOSE: To evaluate the influence of occlusal load cycling on cervical microleakage of proximal slot restorations located in dentin, using two self-etching and two one-bottle dentin adhesive systems.

MATERIALS AND METHODS: 240 proximal slot cavities were prepared in 120 bovine teeth and divided into two groups, one with load cycling and one without. The groups were then subdivided into four subgroups according to the adhesive system used (Experimental EXL 547 Self-etching 3M, Clearfil SE Bond, Single Bond, and Optibond Solo Plus) and restored following the manufacturers' instructions. The teeth were then submitted to mechanical load cycling with a force of 80 N and a frequency of 5 Hz, simultaneously over both restorations of each tooth, for a total of 50,000 cycles per specimen. All specimens were subsequently immersed in a 2% methylene blue solution (pH 7.0), and sectioned to examine the extent of dye penetration under a stereomicroscope (40X).

RESULTS: There was no statistically significant difference (p = 0.00002) between the loaded and unloaded teeth. However, a statistically significant difference was observed between the adhesive systems used. The experimental self-etching EXL 547 presented the lowest mean microleakage, but was only statistically significantly different from the Single Bond loaded and unloaded groups and the Clearfil SE Bond unloaded group.

CONCLUSION: The application of 50,000 loading cycles did not affect the microleakage of the two self-etching and the two one-bottle adhesive systems evaluated. In vitro mechanical load cycling is an important factor to consider when evaluating the performance of adhesive systems under simulated masticatory conditions.
Effect of thermal and mechanical load cycling on nanoleakage of Class II restorations.
Creators: name: Bedran-de-Castro, AKB
name: Thompson, JY
name: Pereira, PNR
name: Pimenta, LAF
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004

description: PURPOSE: To evaluate the effect of thermal and mechanical cycling on the degree and pattern of nanoleakage on cervical margins of Class II restorations.

MATERIALS AND METHODS: Forty box-type Class II cavities were prepared on bovine incisors. The cavities were restored with Single Bond and Z-250 composite resin (3M-ESPE) according to manufacturer's instructions. The teeth were randomly assigned to 4 groups: G1, control; G2, thermal cycling (2000 cycles, 5 to 55 degrees C); G3, mechanical load cycling (100,000 cycles, 50 N); G4, thermal and mechanical load cycling group (2000 cycles 5 to 5 degrees C/100,000 cycles, 50 N). The specimens were then sealed leaving a 1 mm window around the cervical margin interface. Samples were immersed in a 50% w/v ammoniacal silver nitrate solution for 24 h, and exposed to a photodeveloping solution for 8 h. Specimens were sectioned longitudinally, embedded in epoxy resin, polished and mounted on stubs, gold sputter coated, and examined under SEM using backscattered electron mode. Silver particle penetration length was measured directly on the SEM monitor and calculated as the percentage of the total length of cut dentin surface that was penetrated by silver nitrate. The data were analyzed with ANOVA and Fisher's PLSD test (p < 0.05).

RESULTS: The degree of nanoleakage significantly increased when thermal and mechanical cycling was performed on the same specimens, as compared to the other groups (p < 0.05). No differences were observed between the control, thermal cycling, and mechanical cycling groups. No difference in nanoleakage pattern was observed between the groups.

CONCLUSION: Thermal and mechanical cycling combined adversely affected nanoleakage values. Simulation of the oral condition might be crucial to better evaluate and understand the performance of adhesive materials.
Impact of clumping on core-collapse supernova radiation
Creators: name: Dessart, Luc
name: Hillier, D. John
name: Wilk, Kevin D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: There is both observational and theoretical evidence that the ejecta of core-collapse supernovae (SNe) are structured. Rather than being smooth and homogeneous, the material is made of over-dense and under-dense regions of distinct composition. Here, we explore the effect of clumping on the SN radiation during the photospheric phase using 1-D non-local thermodynamic equilibrium radiative transfer and an ejecta model arising from a blue-supergiant explosion (yielding a Type II-peculiar SN). Neglecting chemical segregation, we adopt a velocity-dependent volume-filling factor approach that assumes that the clumps are small but does not change the column density along any sightline. We find that clumping boosts the recombination rate in the photospheric layers, leading to a faster recession of the photosphere, an increase in bolometric luminosity, and a reddening of the SN colors through enhanced blanketing. The SN bolometric light curve peaks earlier and transitions faster to the nebular phase. On the rise to maximum, the strongest luminosity contrast between our clumped and smooth models is obtained at the epoch when the photosphere has receded to ejecta layers where the clumping factor is only 0.5 -- this clumping factor may be larger in Nature. Clumping is seen to have a similar influence in a Type II-Plateau SN model. As we neglect both porosity and chemical segregation our models underestimate the true impact of clumping. These results warrant further study of the influence of clumping on the observables of other SN types during the photospheric phase.
description: Accepted for publication in A&A on 7 Aug. 2018
Searching the Footprint of WIMPZILLAs
Creators: name: Ziaeepour, Houri
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We constrain mass, lifetime and contribution of a very slowly decaying Ultra Heavy Dark Matter (UHDM) by simulating the cosmological evolution of its remnants. Most of interactions which participate in energy dissipation are included in the numerical solution of the Boltzmann equation. Cross-sections are calculated either analytically or by using PYTHIA Monte Carlo program. This paper describes in detail our simulation. To show the importance of the distribution of matter in constraining WIMPZILLA characteristics, we consider two extreme cases: a homogeneous universe, and a local halo with uniform distribution. We show that in a homogeneous universe, the decay of UHDM with a mass \sim 10^15 GeV and a lifetime \sim a few times τ_0 the age of the Universe, can not explain the flux of observed Ultra High Energy Cosmic Rays (UHECRs). This shows the importance of nearby sources, notably galactic halo. In a uniform clump with an over-density of \sim 200 extended to 100 kpc or more, the lifetime must be \sim 10 - 100 τ_0 or the contribution in the DM must be proportionally smaller. We also compare our calculation with observed gamma-rays at E \sim 10^11 eV by EGRET and CASA-MIA limit at E \sim 10^15 eV. They are compatible with a UHDM with relatively short lifetime.
description: 27 pages, 9 figures. New results with better energy resolution close to GZK cutoff. Text slightly modified
The effect of light-curing source and mode on microtensile bond strength to bovine dentin
Creators: name: Ambrosano, Glaucia Maria Bovi
name: Amaral, Cristiane Mariote
name: Pimenta, Luiz André Freire
name: Swift, EJ
name: Peris, Alessandra Rezende
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: PURPOSE: The purpose of this study was to evaluate the effects of different light-curing techniques on the microtensile bond strength of hybrid and packable resin composite to dentin. The null hypotheses were that different light-curing techniques do not affect the adhesion of resin composites to tooth structure and that different resin composites do not have a similar bond to dentin.

MATERIALS AND METHODS: One hundred four box-shaped buccal preparations were made and dentin/enamel adhesive was applied according to the manufacturer's instructions (Single Bond 3M ESPE). A hybrid resin composite (Filtek Z250, A2, 3M ESPE) or a packable resin composite (Solitaire 2, A2, Heraeus Kulzer) were inserted in bulk and polymerized using one of these techniques (n = 13): (a) Soft-start (SS) using a halogen lamp (QTH); (b) LED low intensity; (c) Plasma arc (PAC) curing for 6 s for packable resin composite and 3 s for the hybrid resin composite; (d) Conventional (C) QTH curing for 40 s. Afterwards, specimens were thermocycled 1,000 times between 5 degrees C and 55 degrees C in tap water, and were sectioned into beams with a rectangular cross-sectional area of approximately 1 mm2. Microtensile bond strength testing was performed using a universal testing machine at a crosshead speed of 0.5 mm/min.

RESULTS: Bond strength means +/- (SD) in MPa were: Filtek Z250: SSQTH = 17.9 (5.4); LED = 17.9 (6.4); PAC = 16.8 (6.8); CQTH = 16.1 (4.6). Solitaire 2: SSQTH = 12.4 (6.4); LED = 15.5 (4.3); PAC = 16.2 (4.4); CQTH = 13.8 (5.7). The data were structured in a split-plot design and analyzed by a two-way ANOVA and Tukey's tests (alpha = 0.05).

CONCLUSION: The light-curing method did not significantly affect bond strengths. However, the bond strengths of the packable resin composite were significantly lower than those of the hybrid resin composite for all polymerization techniques, suggesting that the restorative material itself might be a more critical factor in adhesion than the curing method.
Pheidole cavifrons Emery
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole cavifrons

description: Pheidole cavifrons Emery
Pheidole cavifrons Emery 1906c: 144. Syn.: Pheidole arciruga Forel 1908h: 381, n. syn. Types Mus. Civ. Stor. Nat. Genova.
Etymology l cavifrons, hollow front, evidently referring to the deep antennal scrobes.
Diagnosis Closest to longior, somewhat less similar to aberrans and obnixa, distinguished as follows.
Major: head markedly elongate (Head Length/Head Width 1.39); concolorous yellow; hypostoma toothless; dorsal posterior half of head flat; frontal lobes in full-face view with lobose anterior margins; carinulae originating on frontal lobes end far short of midpoint between eyes and occiput; mesonotal convexity in side view reduced; propodeal spines strongly developed; promesonotum smooth and shiny.
Minor: pronotal dorsum covered by semicircular carinulae.
Measurements (mm) Lectotype major: HW 0.76, HL 1.06, SL 0.34, EL 0.06, PW 0.54. Minor: HW 0.46, HL 0.52, SL 0.34, EL 0.04, PW 0.32. color Major: concolorous medium yellow. Minor: concolorous pale yellow.
Range Recorded from Buenos Aires, Argentina; Uruguay; and Rio Grande do Sul and Parana, Brazil. biology The type colony of synonymous " arciruga " was collected from a termite mound in Rio Grande do Sul.
figure Upper: lectotype, major (La Sierra, Uruguay). Lower: minor (" arciruga " syntype, Rio Grande do Sul, Brazil, compared with cavifrons paralectotype). Scale bars = 1 mm.
description: Published as part of Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA :Harvard University Press on page 132
Biochemical homology between rat dorsal prostate and coagulating gland. Purification of a major androgen-Induced protein
Creators: name: French, F S
name: Wilson, E M
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1980

description: The anatomically distinct organs, rat dorsal prostate and coagulating gland, were found to display remarkable homology in protein composition, including two major androgen-dependent secretory proteins, referred to as dorsal proteins I and II. Dorsal protein I has been purified and found to be a dimer composed of two identical subunits with sedimentation coefficient 4.6 S, Stokes radium 32 A, and Mr = 71,000 (62,000 by sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis). This dimer (6.8 S, 46 A, Mr = 150,000) dissociates at high ionic strength and can be partially reconstituted by removal of salt. Dorsal protein I is a basic protein (pI 9) with high lysine content and binds to phosphocellulose but not to DEAE-Sepharose. Schiff's staining shows that it contains carbohydrate. Quantitative rocket immunoelectrophoresis using a rabbit antiserum indicates dorsal protein I is produced only in dorsal prostate and coagulating gland. The protein constitutes approximately 25% of total cytosol protein in both organs, yet makes up on 5% of coagulating gland luminal fluid and ejaculated seminal fluid. It was not detected in the rat dorsal prostate tumor (Dunning R3327H). Dorsal protein II is a larger protein (Mr = 80,000 by SDS gel electrophoresis) with higher carbohydrate content. Under nondenaturing conditions, it has a Stokes radius of > 200 A, corresponding to Mr of > 300,000. Dorsal protein II represents a smaller proportion of total cytosol protein than does dorsal protein I, yet is the predominant protein of coagulating gland fluid. The proteins will be useful probes for studies on androgen regulation of specific gene expression and prostatic secretory mechanisms.
Warped disks during type II outbursts in Be/X-ray binaries: evidence from optical polarimetry
Creators: name: Reig, P.
name: Blinov, D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Current models that explain giant (type II) X-ray outbursts in Be/X-ray binaries (BeXB), are based on the idea of highly distorted disks. They are believed to occur when a misaligned and warped disk becomes eccentric, allowing the neutron star to capture a large amount of material. The BeXB 4U 0115+63 underwent two major outbursts in 2015 and 2017. Our aim is to investigate whether the structural changes in the disk expected during type II outbursts can be detected through optical polarimetry. We present the first optical polarimetric observations and new optical spectra of the BeXB 4U 0115+63 covering the period 2013-2017. We study in detail the shape of the H$α$ line profile and the polarization parameters before, during, and after the occurrence of a type II X-ray outburst. We find significant changes in polarization degree and polarization angle and highly distorted line profiles during the 2017 X-ray outburst. The degree of polarization decreased by $\sim$ 1%, while the polarization angle, which is supposed to be related with the disk orientation, first increased by $\sim 10^{\circ}$ in about two months and then decreased by a similar amount and on a similar timescale once the X-ray activity ceased.We interpret the polarimetric and spectroscopic variability as evidence for the presence of a warped disk.
Absence of zero field muon spin relaxation induced by superconductivity in the B phase of UPt$_3$
Creators: name: de Réotier, P. Dalmas
name: Huxley, A.
name: Yaouanc, A.
name: Flouquet, J.
name: Bonville, P.
name: Imbert, P.
name: Pari, P.
name: Gubbens, P. C. M.
name: Mulders, A. M.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We present muon spin relaxation measurements performed on crystals of the heavy fermion superconductor UPt$_3$. In zero applied field, contrary to a previous report, we do not observe an increase of the internal magnetic field in the lower superconducting phase (the B phase). Our result gives an experimental upper bound of the magnetic field that could be associated with the superconducting state.
description: 4 pages, REVTeX 3.0, 2 PostScript figures
Production of Light Fermion-Antifermion Pairs in gamma gamma Collisions
Creators: name: Denner, A.
name: Dittmaier, S.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The $O(α)$ corrections to $γγ--> f \bar f$ in the Standard Model are calculated for arbitrary, light fermions $f$. The relevant analytical results are listed in a form that is appropriate for practical applications, and numerical results for integrated cross sections are discussed. The corresponding QED corrections are generally of the order of some per mille for arbitrary energies. The weak corrections to $γγ--> e^-e^+$ are negligible below the electroweak scale, reach the per-cent level at a few hundred GeV and grow to about -10% at 2TeV. The weak corrections to $u \bar u$ and $d \bar d$ production have a shape similar to the one for $e^-e^+$, but they are larger by factors $\sim 1.4$ and $\sim 3$, respectively.
description: 19 pages, latex, 7 postscript figures
Bi-Directional Cooperative NOMA without Full CSIT
Creators: name: Choi, Minseok
name: Han, Dong-Jun
name: Moon, Jaekyun
Publisher: name: arXiv
Year: 2018
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we propose bi-directional cooperative non-orthogonal multiple access (NOMA). Compared to conventional NOMA, the main contributions of bi-directional cooperative NOMA can be explained in two directions: 1) The proposed NOMA system is still efficient when the channel gains of scheduled users are almost the same. 2) The proposed NOMA system operates well without accurate channel state information (CSI) at the base station (BS). In a two-user scenario, the closed-form ergodic capacity of bi-directional cooperative NOMA is derived and it is proven to be better than those of other techniques. Based on the ergodic capacity, the algorithms to find optimal power allocations maximizing user fairness and sum-rate are presented. Outage probability is also derived, and we show that bi-directional cooperative NOMA achieves a power gain over uni-directional cooperative NOMA and a diversity gain over non-cooperative NOMA and orthogonal multiple access (OMA). We finally extend the bi-directional cooperative NOMA to a multi-user model. The analysis of ergodic capacity and outage probability in two-user scenario is numerically verified. Also, simulation results show that bi-directional cooperative NOMA provdes better data rates than the existing NOMA schemes as well as OMA in multi-user scenario.
description: 30 pages, 11 figures, submitted to IEEE Transactions on Wireless Communications
Pheidole fracticeps Wilson, 2003, new species
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole fracticeps

description: Pheidole fracticeps new species
Types Mus. Comp. Zool. Harvard.
Etymology L fracticeps, broken head, from the appearance of the major occiput.
Diagnosis A member of the aberrans group closest to the Argentine species lilloi, differing from it and other species in the group by the following set of traits.
Major: very small; yellow; hypostoma 4-toothed; in side view, occiput juts out like a brow, with the principal transverse carina (in profile) giving it a sharp edge, and the profile of the head below it dipping away as a strong concavity; in full-face view, occiput bearing the principal demarcating transverse carina plus several others that cross as irregular lines; eye elliptical, placed forward to a little more than an Eye Length from the anterior genal border.
Minor: dorsal surface of head and most of mesosoma and waist foveolate, with a near absence of carinulae overall. Measurements (mm) Holotype major: HW 0.68, HL 0.86, SL 0.30, EL 0.10, PW 0.40. Paratype minor: HW 0.38, HL 0.44 (approximately), SL 0.34, EL 0.06, PW 0.24. Color Major: concolorous medium yellow. Minor: concolorous yellow.
Range Known from the type locality (Trinidad); Yasuni Research Station, Puerto Tiputini, Yasuni National Park, Ecuador; two series from Brazil; and Reserva Mbaracayu, Dept. Canindeyu, Paraguay.
biology Probably a rainforest species. The South American specimens were taken variously from leaf litter and soil.
Figure Upper: holotype, major. Lower: paratype, minor (head partly crushed). TRINIDAD: Maracas Valley (N. A. Weber, May 1936). Scale bars = 1 mm.
description: Published as part of Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA :Harvard University Press on page 133