cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An evla and carma study of dusty disks and torii with large grains in dying stars
Creators: name: Sahai, R.
name: Claussen, M. J.
name: Schnee, S.
name: Morris, M. R.
name: Contreras, C. Sánchez
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the results of a pilot multiwavelength survey in the radio continuum (X, Ka and Q bands, i.e., from 3.6 cm to 7 mm) carried out with the EVLA in order to confirm the presence of very large dust grains in dusty disks and torii around the central stars in a small sample of post-AGB objects, as inferred from millimeter and sub-millimeter observations. Supporting mm-wave observations were also obtained with CARMA towards three of our sources. Our EVLA survey has resulted in a robust detection of our most prominent submm emission source, the pre-planetary nebula IRAS 22036+5306, in all three bands, and the disk-prominent post-AGB object, RV Tau, in one band. The observed fluxes are consistent with optically-thin free-free emission, and since they are insignificant compared to their submm/mm fluxes, we conclude that the latter must come from substantial masses of cool, large (mm-sized) grains. We find that the power-law emissivity in the cm-to-submm range for the large grains in IRAS22036 is nu^{beta}, with beta=1-1.3. Furthermore, the value of beta in the 3 to 0.85 mm range for the three disk-prominent post-AGB sources (beta < or = 0.4) is significantly lower than that of IRAS22036, suggesting that the grains in post-AGB objects with circumbinary disks are likely larger than those in the dusty waists of pre-planetary nebulae.
description: accepted for special Astrophysical Journal (Letters) EVKA issue
Chen-Ruan cohomology of some moduli spaces, II
Creators: name: Biswas, Indranil
name: Poddar, Mainak
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 14D20, 14F05

description: Let X be a compact connected Riemann surface of genus at least two. Let r be a prime number and ξa holomorphic line bundle on it such that r is not a divisor of degree(ξ). Let {\mathcal M}_ξ(r) denote the moduli space of stable vector bundles over X of rank r and determinant ξ. By Γwe will denote the group of line bundles L over X such that $L^{\otimes r}$ is trivial. This group Γacts on {\mathcal M}_ξ(r). We compute the Chen-Ruan cohomology of the corresponding orbifold.
description: International Journal of Mathematics (Vol. 21)
Extremal extensions of entanglement witnesses: Unearthing new bound entangled states
Creators: name: Sengupta, R.
name: Arvind
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we discuss extremal extensions of entanglement witnesses based on Choi's map. The constructions are based on a generalization of the Choi map due to Osaka, from which we construct entanglement witnesses. These extremal extensions are powerful in terms of their capacity to detect entanglement of positive under partial transpose (PPT) entangled states and lead to unearthing of entanglement of new PPT states. We also use the Cholesky-like decomposition to construct entangled states which are revealed by these extremal entanglement witnesses.
description: 8 pages 6 figures revtex4-1
Development of Pb-MnO₂ composite anodes for electrowinning application : electrochemical and corrosion evaluations
Creators: name: Mohammadi, Maysam
Publisher: name: University of British Columbia
Year: 2016

description: Electrowinning is the last step of the extraction of zinc in which aqueous zinc ions are electrodeposited to produce highly pure zinc metal. This process operates in highly acidic solutions and at high current densities. Conventional lead-based anodes used in the zinc electrowinning are associated with high corrosion rates and oxygen evolution overpotential in the electrowinning process. These result in some problems such as Pb contaminating the zinc cathode, shortened anode lifetime, and high energy consumption in the process. Lead-based composite anodes have been introduced to address these issues by using electroactive oxide particles dispersed in the Pb anode. Manganese ions, which typically exist in the zinc electrowinning electrolyte, can influence the anode performance, depending on their concentration and the anode material. The main aim of this work was to develop a new composite anode using MnO₂ particles in a Pb matrix to improve the anode performance in the zinc electrowinning operating conditions in Mn-free and Mn-containing electrolytes. A combination of electrochemical and analytical methods was used to understand the oxidation, electrocatalytic activity, and corrosion performance of the Pb-MnO₂ composite anodes compared to the conventional PbAg anode. Potentiometric titration was utilized to measure the oxidation rate of manganese ions. The anodic corrosion layers and the MnO₂ deposited layers were characterized by Scanning Electron Microscopy and X-Ray Diffraction. A new electrochemical method was also developed for an on-site investigation of the deposited MnO₂ layer on the anodes. The Pb-MnO₂ composite anodes showed higher catalytic activity and better corrosion resistance than the PbAg anode under the zinc electrowinning operating conditions. The Pb–MnO₂ anode can decrease the energy consumption in the electrowinning process in the Mn-free electrolyte by up to 5%. The composite particles were not effective in decreasing the anode potential in the Mn-containing electrolyte. The MnO₂ particles catalyzed Mn(III) disproportionation, contributing to the deposition of a uniform, adherent, and protective MnO₂ layer. Formation of this layer decreased the lead dissolution and manganese consumption rates. The Pb-MnO₂ composite anode can be put into service without any pre-treatment since it quickly develops a stable MnO₂ layer and generates very low MnO₂ mud.
A Non-potential Model for the Sun's Open Magnetic Flux
Creators: name: Yeates, A. R.
name: Mackay, D. H.
name: van Ballegooijen, A. A.
name: Constable, J. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Measurements of the interplanetary magnetic field (IMF) over several solar cycles do not agree with computed values of open magnetic flux from potential field extrapolations. The discrepancy becomes greater around solar maximum in each cycle, when the IMF can be twice as strong as predicted by the potential field model. Here we demonstrate that this discrepancy may be resolved by allowing for electric currents in the low corona (below 2.5 solar radii). We present a quasi-static numerical model of the large-scale coronal magnetic evolution, which systematically produces these currents through flux emergence and shearing by surface motions. The open flux is increased by 75%-85% at solar maximum, but only 25% at solar minimum, bringing it in line with estimates from IMF measurements. The additional open flux in the non-potential model arises through inflation of the magnetic field by electric currents, with super-imposed fluctuations due to coronal mass ejections. The latter are modelled by the self-consistent ejection of twisted magnetic flux ropes.
description: 10 pages, 8 figures, accepted for publication in J. Geophys. Res. A
Additional file 1 of Plasma metabolomic profiles of dementia: a prospective study of 110,655 participants in the UK Biobank
Creators: name: Zhang, Xinyu
name: Hu, Wenyi
name: Wang, Yueye
name: Wang, Wei
name: Liao, Huan
name: Zhang, Xiayin
name: Kiburg, Katerina V.
name: Shang, Xianwen
name: Bulloch, Gabriella
name: Huang, Yu
name: Zhang, Xueli
name: Tang, Shulin
name: Hu, Yijun
name: Yu, Honghua
name: Yang, Xiaohong
name: He, Mingguang
name: Zhu, Zhuoting
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Mental Health
subject: Plant Biology

description: Additional file 1: Table S1. Baseline characteristics of study participants stratified by discovery or replication dataset. Table S2. β coefficient of adjusted HR (95% CI) and P values of Incident Dementia for All 249 Metabolites in Cox Proportional Hazards Model. Table S3. Coefficients of selected 24 metabolites in elastic net regularized logistic regression model after 10-fold cross validation, their coefficients in e-net regression model in training dataset, and their VIFs in testing dataset.
"An Object That's Not An Object": A Conversation On Literature And Belonging With Madeleine Thien
Creators: name: Thien, Madeleine
name: Oberzaucher, Helena
Publisher: name: Zenodo
Year: 2023
Subjects: canadian studies
canadian literature
asian-canadian literature
canadian women's literature
family history
Chinese history
novels about China
Madeleine Thien
migration

description: In July 2023, Canadian author Madeleine Thien joined the program of the first European Summer School in Canadian Studies (ESSCS), co-organized by the Centres for Canadian Studies at the Universities of Vienna and Innsbruck. In a reading and an author’s talk with Helena Oberzaucher, she talked about reading, writing, and literature and read from her acclaimed novel Do Not Say We Have Nothing.
Ceriagrion erubescens Selys.
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Ceriagrion
Ceriagrion erubescens

description: 51. Ceriagrion erubescens Selys. - Eastcoast Gvt.: Deli. Soekaranda? (Kruger). Westcoast Res.: Mt. Ophir distr. and Padangsche Bovenlanden (Ris). S. Lampoeng Res.: Telokbetoeng. Oosthaven. Drescher leg.
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Kruger. L. Die Odonaten von Sumatra. I ~ III. Stett. ent. Zeitg. 59 - 63. 1898 - 1902.", "Ris. F. Odonaten von Sumatra, gesammelt von Edward Jacobson. Zool. Meded. Leiden. 10. 1927."]}
Understanding the welfare of rats living in standard versus semi-naturalistic laboratory environments
Creators: name: Makowska, Inez Joanna
Publisher: name: University of British Columbia
Year: 2016

description: Rats are one of the most commonly used animals in research. Differences in rat housing lead to differences in brain, behaviour, physiology and health. These differences can also affect rat welfare and the validity of data obtained from these animals. Few studies have assessed the consequences of housing rats in standard laboratory cages compared to more complex, naturalistic environments; fewer still have assessed these consequences in females, or after more than a few weeks of differential housing. The aim of my thesis was to assess the sustained welfare consequences of housing female rats in standard versus semi-naturalistic laboratory conditions. The psychological well-being of animals is central to the concept of animal welfare, so Chapter 2 provides a review of the scientific methods of assessing affective states in animals, how these methods have been applied to rats, and what the results can tell us about rats’ experience of various emotional states. Chapter 3 investigated rats’ propensity to engage in behaviours that are not possible in standard laboratory cages: burrowing, climbing and standing upright. Results indicated that burrowing and standing upright may be especially important to rats. Chapter 4 assessed the sustained affective consequences of standard versus semi-naturalistic housing using an anticipatory behaviour test. Results indicated that standard-housed rats were experiencing poorer welfare than the semi-naturalistic-housed rats. These studies were not designed to test differences in health between the two housing conditions, but given the very limited amount of research on the long-term health effects of differential housing in rats, Chapter 5 documented differences in body weight and development of naturally-occurring tumours. Standard-housed rats were much heavier than semi-naturalistic-housed rats, but there were no differences in the rate of tumour development. Collectively, these results indicate that, compared to the semi-naturalistic housing assessed in this thesis, standard laboratory housing for rats compromises rat welfare by 1) preventing the performance of important natural behaviours; 2) leading to negative affective states; and 3) leading to overweight animals predisposed to developing other health issues. Implications for rat welfare and the quality of the science obtained from standard-housed rats are discussed, and recommendations are provided.
Silicon carbide: A replacement of Silicon from semiconductor industry
Creators: name: Rishabh
name: Shivam
Publisher: name: Zenodo
Year: 2020
Subjects: Silicon Carbide wafer, SiC, semiconductor, semiconductor device manufacturing

description: Discovered in 1891, Silicon carbide (SiC) is known for its extreme hardness and High-temperature resistance, and is used majorly since then as an abrasive, in cutting tools, bearings and in high temperature applications like crucibles for melting metals etc. Recently, demand of single crystal SiC wafers is gaining momentum in electronic chip manufacturing in semiconductor industries. Single crystal SiC is an electrical insulator and is optically transparent in pure form. Dopant like Nitrogen or Aluminum are added to tailor its electronic properties making it semiconducting. Addition of dopant also changes the color from transparent to green or blue transparent depending on the level of dopant impurities added. Also electrical conductivity can be controlled by varying doping concentration. SiC wafers have certain properties far superior than its counterpart Silicon wafer, making it strong contender for replacing Silicon wafer from semiconductor industry. Recently, Tesla has been using SiC based semiconducting chips in its electric vehicles. So in this article we will discuss what are the properties of SiC wafer which makes them better option for electronic chip manufacturing.
Threshold expansion of massive coloured particle cross sections
Creators: name: Beneke, M.
name: Falgari, P.
name: Klein, S.
name: Schwinn, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Pair production of massive coloured particles in hadron collisions is accompanied by potentially large radiative corrections related to the suppression of soft gluon emission and enhanced Coulomb exchange near the production threshold. We recently developed a framework to sum both series of corrections for the partonic cross section using soft-collinear and non-relativistic effective theory. If it can be argued that the resummed cross section approximates the complete result over a significant kinematic range, an improvement of the hadronic cross section results, even when the production is not kinematically constrained to the threshold. This is discussed here for the case of top quark production.
description: 5 pages, to appear in: Proceedings of the 10th DESY Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory 2010, W\"orlitz, Germany, 25-30 Apr 2010
The Ledge
Creators: name: (:Null)
Publisher: name: Nelson, B.C. : R.T. Lowery
Year: 2016

description: The Nakusp Ledge was published in Nakusp, in the Central Kootenay region of southeastern British Columbia, from October 1893 to December 1894. The paper was subsequently published as the Ledge both in New Denver, from December 1894 to December 1904, and in Fernie, from January to August 1905. The Ledge was published by Robert Thornton Lowery, a prolific newspaper publisher, editor, and printer who was also widely acclaimed for his skill as a writer. After moving to Fernie, the paper continued to be published under variant titles, including the Fernie Ledger and the District Ledger, from August 1905 to August 1919.
Ceriagrion praetermissum Lieftinck.
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Ceriagrion
Ceriagrion praetermissum

description: 52. Ceriagrion praetermissum Lieftinck. - S. Lampoeng Res.: Mt. Tanggamoes. Gisting. 600 m. June 23. 1914. Toxopeus leg.. and Kotaagoeng. sea-level. Dec. 26. 1934. common. Author leg. (Lieftinck).
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Lieftinck. M. A. Dragonflies (Odonata) from Northeast Sumatra. Misc. Zool. Sum. 34. 1929."]}
Can we detect Hot or Cold spots in the CMB with Minkowski Functionals?
Creators: name: Lim, Eugene A.
name: Simon, Dennis
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we investigate the utility of Minkowski Functionals as a probe of cold/hot disk-like structures in the CMB. In order to construct an accurate estimator, we resolve a long-standing issue with the use of Minkowski Functionals as probes of the CMB sky -- namely that of systematic differences ("residuals") when numerical and analytical MF are compared. We show that such residuals are in fact by-products of binning, and not caused by pixelation or masking as originally thought. We then derive a map-independent estimator that encodes the effects of binning, applicable to beyond our present work. Using this residual-free estimator, we show that small disk-like effects (as claimed by Vielva et al.) can be detected only when a large sample of such maps are averaged over. In other words, our estimator is noise-dominated for small disk sizes at WMAP resolution. To confirm our suspicion, we apply our estimator to the WMAP7 data to obtain a null result.
description: 15 pages, 13 figures
Ceriagrion
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy

description: 53. Ceriagrion ? melanurum Selys. - Eastcoast Gvt.: Mt. Sinaboeng (Kruger). Laidlaw has suggested that this specimen might rather belong to his pendleburyi.
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Kruger. L. Die Odonaten von Sumatra. I ~ III. Stett. ent. Zeitg. 59 - 63. 1898 - 1902."]}
Convergence to type I distribution of the extremes of sequences defined by random difference equation
Creators: name: Hitczenko, Pawel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 60G70, Secondary 60F05

description: We study the extremes of a sequence of random variables $(R_n)$ defined by the recurrence $R_n=M_nR_{n-1}+q$, $n\ge1$, where $R_0$ is arbitrary, $(M_n)$ are iid copies of a non--degenerate random variable $M$, $0\le M\le1$, and $q>0$ is a constant. We show that under mild and natural conditions on $M$ the suitably normalized extremes of $(R_n)$ converge in distribution to a double exponential random variable. This partially complements a result of de Haan, Resnick, Rootzén, and de Vries who considered extremes of the sequence $(R_n)$ under the assumption that $¶(M>1)>0$.
description: to appear in Stochastic Processes and their Applications
Kepler observations of a roAp star: delta Scuti and gamma Doradus pulsations in Ap stars
Creators: name: Balona, Luis
name: Cunha, Margarida
name: Kurtz, Don
name: Brandao, Isa Maria
name: Gruberbauer, Michael
name: Saio, Hideyuki
name: Ostensen, Roy
name: Elkin, Vladimir
name: Borucki, William
name: Christensen-Dalsgaard, Joergen
name: Kjeldsen, Hans
name: Koch, David
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Observations of the A5p star KIC 8677585 obtained during the Kepler 10-d commissioning run with 1-min time resolution show that it is a roAp star with several frequencies with periods near 10 min. In addition, a low frequency at 3.142 cycles/day is also clearly present. Multiperiodic gamma Doradus and delta Scuti pulsations, never before seen in any Ap star, are present in Kepler observations of at least three other Ap stars. Since gamma Doradus pulsations are seen in Ap stars, it is likely that the low-frequency in KIC 8677585 is also a gamma Doradus pulsation. The simultaneous presence of both gamma Doradus and roAp pulsations and the unexpected detection of delta Scuti and gamma Doradus pulsations in Ap stars present new opportunities and challenges for the interpretation of these stars.
description: 9 pages and 5 figures
Water vapour at high redshift: Arecibo monitoring of the megamaser in MG J0414+0534
Creators: name: Castangia, P.
name: Impellizzeri, C. M. V.
name: McKean, J. P.
name: Henkel, C.
name: Brunthaler, A.
name: Roy, A. L.
name: Wucknitz, O.
name: Ott, J.
name: Momjian, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The study of water masers at cosmological distances would allow us to investigate the parsec-scale environment around powerful radio sources, to probe the physical conditions of the molecular gas in the inner parsecs of quasars, and to estimate their nuclear engine masses in the early universe. To derive this information, the nature of the maser source, jet or disk-maser, needs to be assessed through a detailed investigation of the observational characteristics of the line emission. We monitored the maser line in the lensed quasar MGJ0414+0534 at z = 2.64 with the 300-m Arecibo telescope for ~15 months to detect possible additional maser components and to measure a potential velocity drift of the lines. In addition, we follow the maser and continuum emissions to reveal significant variations in their flux density and to determine correlation or time-lag, if any, between them. The main maser line profile is complex and can be resolved into a number of broad features with line widths of 30-160 km/s. A new maser component was tentatively detected in October 2008 that is redshifted by 470 km/s w.r.t the systemic velocity of the quasar. The line width of the main maser feature increased by a factor of two between the Effelsberg and EVLA observations reported by Impellizzeri et al. (2008) and the first epoch of the Arecibo monitoring campaign. After correcting for the lens magnification, we find that the total H2O isotropic luminosity of the maser in MGJ0414+0534 is now ~30,000 Lsun, making this source the most luminous ever discovered.[Abridged]
description: 8 pages, 6 figures, accepted for publication in A&A
Teinobasis euglena Lieftinck
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Teinobasis
Teinobasis euglena

description: 54. Teinobasis euglena Lieftinck (= combusta Krug.. nec Selys). - Eastcoast Gvt.: Deli. Soekaranda (Kruger). S. Lampoeng Res.: Telokbetoeng. Oosthaven. sea-level (Lieftinck).
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Selys Longchamps. E. d e. Odonates de Sumatra, etc. Ann. Mus. civ. Genova, 27, 1889.", "Kruger. L. Die Odonaten von Sumatra. I ~ III. Stett. ent. Zeitg. 59 - 63. 1898 - 1902.", "Lieftinck. M. A. Dragonflies (Odonata) from Northeast Sumatra. Misc. Zool. Sum. 34. 1929."]}
New Developments in Quantum Algorithms
Creators: name: Ambainis, Andris
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In this survey, we describe two recent developments in quantum algorithms. The first new development is a quantum algorithm for evaluating a Boolean formula consisting of AND and OR gates of size N in time O(\sqrt{N}). This provides quantum speedups for any problem that can be expressed via Boolean formulas. This result can be also extended to span problems, a generalization of Boolean formulas. This provides an optimal quantum algorithm for any Boolean function in the black-box query model. The second new development is a quantum algorithm for solving systems of linear equations. In contrast with traditional algorithms that run in time O(N^{2.37...}) where N is the size of the system, the quantum algorithm runs in time O(\log^c N). It outputs a quantum state describing the solution of the system.
description: 11 pages, 1 figure, to appear as an invited survey talk at MFCS'2010
Teinobasis ruficollis Selys
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Teinobasis
Teinobasis ruficollis

description: 55. Teinobasis ruficollis (Selys). - Westcoast Res.: Mt. Ophir distr. (Ris). Riouw Res.: Doerian I. (Riouw Archip.). 1 ♂. June 1923. Dammerman leg.
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Ris. F. Odonaten von Sumatra, gesammelt von Edward Jacobson. Zool. Meded. Leiden. 10. 1927."]}
The complexity of understanding human milk components and infant brain development
Creators: name: Moukarzel, Sara
Publisher: name: University of British Columbia
Year: 2016

description: Understanding which and how human milk components contribute to infant brain development is complicated in part by their large diversity, complex arrangement in the milk matrix and potential interaction in metabolism. This research addressed the importance of studying the composition of minor milk lipids and of exploring their relationship with non-lipid milk components in infant brain development. More specifically, the milk fat globule membrane (MFGM), a complex tri-layer of cholesterol, glycoproteins, and polar lipids including ethanolamine plasmalogens (Pls-PE), naturally emulsifies milk triacylglycerols but is not currently added to infant milk substitutes. Clinical evidence suggests MFGM plays a role in cognitive function. Whether MFGM directly affects the developing brain is unclear. Due to analytical challenges, little is known about the fatty acid composition of human MFGM lipids, particularly Pls-PE. Pls-PE may be enriched in long-chain polyunsaturated fatty acids (LC-PUFA) such as docosahexaenoic acid (DHA), an important neural lipid during development. Additionally, milk contains different forms of water-soluble choline (WSC) compounds (free choline, glycerophosphocholine, phosphocholine) for which distinct biological roles are unknown, although choline as a molecule per se is an important structural component of the brain and a precursor of the neurotransmitter acetylcholine. After developing an analytical method for separation and recovery of milk Pls-PE, the first study demonstrated both human and cow milk Pls-PE are enriched in LC-PUFA including DHA compared to other phospholipids. Milk Pls-PE DHA does not seem to vary with maternal DHA intake. Using artificially-reared infant rats, the second study showed that developmental brain phospholipids and metabolites differ between rats fed formula with or without MFGM, with a closer phospholipid composition to mother-reared rats in rats fed MFGM. By analyzing human preterm and term milk samples for WSC composition using mass spectrometry in the third study, we confirmed previous findings of the wide variability in WSC total content and composition in human milk and reported no significant association between individual WSC compounds. These studies provide new knowledge that milk contains novel components potentially relevant to the brain, and, while the mechanisms for improved cognition remain unclear, MFGM affects neonatal brain phospholipid composition.
Decomposition of spinor groups by the involution σ' in exceptional Lie groups
Creators: name: Miyashita, Toshikazu
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 22E10, 22E15

description: The compact exceptional Lie groups F4, E6, E7 and E8 have spinor groups as a subgroup as follows: E8 \supset Ss(16) \supset Spin(15) \supset Spin(14) \supset Spin(13), E7 \supset Spin(12) \supset Spin(11), E6 \supset Spin(10), F4 \supset Spin(9) \supset Spin(8) \supset Spin(7) \supset \cdot \cdot \cdot \supset Spin(1) \ni 1. We know the involution σ' induced an element σ' \in Spin(8) \subset F4 \subset E6 \subset E7 \subset E8. Now, in this paper, we determine the group structures of (Spin(n))σ' which are the fixed subgroups by the involution σ'.
description: 24pages
Simulation of inelastic electron tunneling spectroscopy of single molecules with functionalized tips
Creators: name: Garcia-Lekue, Aran
name: Sanchez-Portal, Daniel
name: Arnau, Andres
name: Frederiksen, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The role of the tip in inelastic electron tunneling spectroscopy (IETS) performed with scanning tunneling microscopes (STM) is theoretically addressed via first-principles simulations of vibrational spectra of single carbon monoxide (CO) molecules adsorbed on Cu(111). We show how chemically functionalized STM tips modify the IETS intensity corresponding to adsorbate modes on the sample side. The underlying propensity rules are explained using symmetry considerations for both the vibrational modes and the molecular orbitals of the tip and sample. This suggests that single-molecule IETS can be optimized by selecting the appropriate tip orbital symmetry.
description: 11 pages, 6 figures
The persistent cosmic web and its filamentary structure II: Illustrations
Creators: name: Sousbie, Thierry
name: Pichon, Christophe
name: Kawahara, Hajime
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Mathematical Physics (math-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The recently introduced discrete persistent structure extractor (DisPerSE, Soubie 2010, paper I) is implemented on realistic 3D cosmological simulations and observed redshift catalogues (SDSS); it is found that DisPerSE traces equally well the observed filaments, walls, and voids in both cases. In either setting, filaments are shown to connect onto halos, outskirt walls, which circumvent voids. Indeed this algorithm operates directly on the particles without assuming anything about the distribution, and yields a natural (topologically motivated) self-consistent criterion for selecting the significance level of the identified structures. It is shown that this extraction is possible even for very sparsely sampled point processes, as a function of the persistence ratio. Hence astrophysicists should be in a position to trace and measure precisely the filaments, walls and voids from such samples and assess the confidence of the post-processed sets as a function of this threshold, which can be expressed relative to the expected amplitude of shot noise. In a cosmic framework, this criterion is comparable to friend of friend for the identifications of peaks, while it also identifies the connected filaments and walls, and quantitatively recovers the full set of topological invariants (Betti numbers) {\sl directly from the particles} as a function of the persistence threshold. This criterion is found to be sufficient even if one particle out of two is noise, when the persistence ratio is set to 3-sigma or more. The algorithm is also implemented on the SDSS catalogue and used to locat interesting configurations of the filamentary structure. In this context we carried the identification of an ``optically faint'' cluster at the intersection of filaments through the recent observation of its X-ray counterpart by SUZAKU. The corresponding filament catalogue will be made available online.
description: A higher resolution version is available at http://www.iap.fr/users/sousbie together with complementary material (movie and data). Submitted to MNRAS
Archibasis melanocyana Selys
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Archibasis
Archibasis melanocyana

description: 56. Archibasis melanocyana (Selys). - Westcoast Res.: Mt. Ophir distt.. (Ris).
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Ris. F. Odonaten von Sumatra, gesammelt von Edward Jacobson. Zool. Meded. Leiden. 10. 1927."]}
Bifurcation diagrams on iso-energetic levels of the Kowalevski-Yehia gyrostat
Creators: name: Kharlamov, M. P.
name: Kharlamova, I. I.
name: Shvedov, E. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Dynamical Systems (math.DS)
subject: Symplectic Geometry (math.SG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 70E17, 70G40

description: We consider the problem of motion of the heavy gyrostat in the case of Kowalevski-Yehia. To classify the bifurcation diagrams on iso-energetic levels we establish the existence of motion conditions in terms of parameters on the bifurcation surfaces. Obtaining these conditions in the form of explicit inequalities we build the separating set in the "energy-gyrostatic momentum" plane. Thus the electronic atlas of iso-energetic diagrams is created.
description: LaTex, 11 pages
El problema de las construcciones privadas parasitarias y abusivas: su regulación y represión en el Bajo Imperio Romano
Creators: name: Malavé Osuna, Maria Belen
Publisher: name: Studi Urbinati - Serie A
Year: 2014

description: Nella legislazione relativa all’edilizia pubblica, la serie delle norme presenta un crescendo continuo nell’epoca tardo imperiale. Gli interessi di ordine pubblico si fanno sentire nella vita delle città: la regola che vieta la costruzione di edifici privati congiunti ai pubblici è ripetuta nelle costituzioni imperiali. Ecco alcuni testi: C.Th.15,1,25; 15,1,46; 15,1,4; 15,1,38; 15,1,47; C.8,11,6; C.8,11,20.Il regolamento della distanza può essere suggerito dall’interesse estetico e dalla sicurezza pubblica, per evitare gli incendi: C.Th. 15,1,4 prescrive la distanza di cento piedi dai magazzini pubblici e C.Th. 15,1,46 prescrive la distanza di quindici piedi dagli edifici pubblici: non mancarono tentativi per rimettere in vigore l’ambitus. Ai contravventori è comminata la demolizione degli edifici fabbricati sul confine e in un caso speciale una multa (C.8,11,20). Alcune norme prescrivevano l’intervallo fra gli edifici nella città di Costantinopoli ma Ammiano Marcellino parla di Roma, essendo ispirate a ragioni di interesse pubblico contro il fuoco, ma l’interesse estetico fece introdurre alcune gravi limitazioni (C.Th.15,1,25).
description: Studi Urbinati - Serie A, Vol 58, N° 1 (2007)
La politica del colonialismo italiano nei limiti dello Statuto albertino: dalla sua nascita fino alla prima guerra mondiale (dal 1848 al 1914)
Creators: name: Marinelli, Barbara Sabrina Deborah
Publisher: name: Studi Urbinati - Serie A
Year: 2014

description: Argomento centrale, rilevante sia dal profilo storico che giuridico, nel presente studio è quello del colonialismo italiano. In particolare, lo stesso viene affrontato alla luce non solo del singolare contesto storico della madrepatria e delle singole colonie, ivi trattate; ma nei limiti dello stesso testo normativo di riferimento, lo Statuto albertino.Il profilo della legittimità è giuridicamente considerato; esula da valutazioni politologiche del periodo.
description: Studi Urbinati - Serie A, Vol 58, N° 1 (2007)
Blowing of polysilicon fuses
Creators: name: Lee, W. T.
name: Fowler, A. C.
name: Power, O.
name: Healy, S.
name: Browne, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Polysilicon fuses are one time programmable memory elements which allow the calibration of integrated circuits at wafer and package level. We present a zero dimensional lumped parameter model of the programming of fuses made from a combination of tungsten silicide and polycrystalline silicon. The components of the model are an electrical model, a thermal model and a flow model. The electrical model describes the temperature and geometry dependent resistance of the fuse. The thermal model describes the heating and melting of the fuse and its surroundings. The flow model describes the disconnection of the fuse by electromigration driven flow of silica. The model generates quantitatively accurate results and reproduces trends with applied voltage and fuse size.
description: 3 pages, 4 figures, 1 table
Amphicnemis ecomuta Selys
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Amphicnemis
Amphicnemis ecomuta

description: ** 57. Amphicnemis ecomuta (Selys).- Eastcoast Gvt.: Deli. Soekaranda (Kruger). Westcoast Res.: Fort de Kock (Selys).
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Ris. F. Odonaten von Sumatra, gesammelt von Edward Jacobson. Zool. Meded. Leiden. 10. 1927.", "Kruger. L. Die Odonaten von Sumatra. I ~ III. Stett. ent. Zeitg. 59 - 63. 1898 - 1902.", "Selys Longchamps. E. d e. Odonates de Sumatra, etc. Ann. Mus. civ. Genova, 27, 1889."]}
Microfluidic-based fabrication of microgels for tissue engineering
Creators: name: Samanipour, Roya
Publisher: name: University of British Columbia
Year: 2016

description: This thesis presents the experimental and computational study of hydrogel microgels using flow-focusing devices. The microfluidic devices were fabricated to generate microgels from two immiscible phases of fluids. Conventional replica molding and photolithography methods were used to fabricate a rectangular channel microfluidic device. Using the flow-focusing microfluidic devices, effects of various parameters on hydrogel pre-polymer droplet generation were investigated experimentally and computationally. First, three-dimensional (3D) computational simulations were conducted to study the physics of hydrogel pre-polymer droplet formation mechanism in three different regimes: squeezing, dripping, and jetting regime. Subsequently, effects of viscous, inertia and surface tension force on the gelatin methacrylate (GelMA) pre-polymer droplet generation and droplet size were studied through experiments. Finally, based on computational and experimental results, the uniformly controlled size of GelMA microgels was created. All experimental data were summarized by a capillary number of the dispersed and the continuous phases to characterize the different regimes of GelMA pre-polymer droplet generation and to predict the transition of dripping to a jetting regime for GelMA pre-polymer in the flow-focusing device. Also, two types of cells, MCF-7 breast cancer cells, and 3T3 fibroblasts, were mixed in a 5 wt% GelMA pre-polymer solution used as dispersed phase. The uniform cell-laden GelMA microgels were fabricated and the cell viability was over 80%. In addition, a new method to create the polydimethylsiloxane (PDMS) circular channel was developed using a rapid and cheap 3D printing process. Due to the resolution limitation of 3D printing, the channels were elliptical, and subsequent liquid PDMS injection process was adopted to form fully circular channels.
title: Mechanical impulse enhancement in a microsystem based on nanoporous silicon combustion
Creators: name: Lazarouk, S.K.
name: Dolbik, A.V.
name: Labunov, V.A.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2019
Subjects: combustion
explosion
mechanical pulse
microthruster
multichip structure
nanoporous silicon

description: Nanostructured porous silicon impregnated by solid state oxidizer has been studied in order to provide the mechanical impulse for jet-propulsion microsystems. The system with jet-propulsion motion on a silicon chip has been tested for impulse measurements. The silicon chip has been fastened on a carrying platform through an elastic spacer. The elastic spacer promotes the combustion and prevents from explosion of porous silicon fast oxidation. It is shown that such a microsystem gains the impulse up to 200-220 mN·s. doi: 10.18720/MPM.4112019_2
The Role of Wind Waves in Dynamics of the Air-Sea Interface
Creators: name: Polnikov, Vladislav G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: G.3
subject: 76F55

description: Wind waves are considered as an intermediate small-scale dynamic process at the air-sea interface,which modulates radically middle-scale dynamic processes of the boundary layers in water and air. It is shown that with the aim of a quantitative description of the impact said, one can use the numerical wind wave models which are added with the blocks of the dynamic atmosphere boundary layer (DABL) and the dynamic water upper layer (DWUL). A mathematical formalization for the problem of energy and momentum transfer from the wind to the upper ocean is given on the basis of the well known mathematical representations for mechanisms of a wind wave spectrum evolution. The problem is solved quantitatively by means of introducing special system parameters: the relative rate of the wave energy input, IRE, and the relative rate of the wave energy dissipation, DRE. For two simple wave-origin situations, the certain estimations for values of IRE and DRE are found, and the examples of calculating an impact of a wind sea on the characteristics of both the boundary layer of atmosphere and the water upper layer are given. The results obtained permit to state that the models of wind waves of the new (fifth) generation, which are added with the blocks of the DABL and the DWUL, could be an essential chain of the general model describing the ocean-atmosphere circulation.
description: 11 pages, 4 figures, 1 table
Pericnemis stictica Selys.
Creators: name: Lieftinck, M. A.
Publisher: name: Zenodo
Year: 1935
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Pericnemis
Pericnemis stictica

description: 59. Pericnemis stictica Selys. - Eastcoast Gvt.: Deli. Soekaranda. 1 ♀ (Kruger). Benkoelen Res.,: Redjang. Soebanajam. 1 ♀ (Ris). S. Lampoeng Res.: Mt. Tanggamoes. Gisting. 500 m. 1 ♀ Sept. 26. 1933. Toxopeus leg. - Abd. 49. hw. 37 mm. One of the smallest specimens which I have seen. I possess some ♀ ♀ from Mt. Slamat and Mt. Raoeng. in Java. which are of the same size or even smaller; in this respect the species is a very variable insect. Differs from Javan females only in that the pterostigma is brown surrounded by a broad yellow border. instead of being entirely yellow. In the structure of its prothorax the present ♀ is identical with Javan ones.
description: Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875
description: {"references": ["Kruger. L. Die Odonaten von Sumatra. I ~ III. Stett. ent. Zeitg. 59 - 63. 1898 - 1902.", "Ris. F. Odonaten von Sumatra, gesammelt von Edward Jacobson. Zool. Meded. Leiden. 10. 1927."]}
The persistent cosmic web and its filamentary structure I: Theory and implementation
Creators: name: Sousbie, Thierry
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Mathematical Physics (math-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present DisPerSE, a novel approach to the coherent multi-scale identification of all types of astrophysical structures, and in particular the filaments, in the large scale distribution of matter in the Universe. This method and corresponding piece of software allows a genuinely scale free and parameter free identification of the voids, walls, filaments, clusters and their configuration within the cosmic web, directly from the discrete distribution of particles in N-body simulations or galaxies in sparse observational catalogues. To achieve that goal, the method works directly over the Delaunay tessellation of the discrete sample and uses the DTFE density computed at each tracer particle; no further sampling, smoothing or processing of the density field is required. The idea is based on recent advances in distinct sub-domains of computational topology, which allows a rigorous application of topological principles to astrophysical data sets, taking into account uncertainties and Poisson noise. Practically, the user can define a given persistence level in terms of robustness with respect to noise (defined as a "number of sigmas") and the algorithm returns the structures with the corresponding significance as sets of critical points, lines, surfaces and volumes corresponding to the clusters, filaments, walls and voids; filaments, connected at cluster nodes, crawling along the edges of walls bounding the voids. The method is also interesting as it allows for a robust quantification of the topological properties of a discrete distribution in terms of Betti numbers or Euler characteristics, without having to resort to smoothing or having to define a particular scale. In this paper, we introduce the necessary mathematical background and describe the method and implementation, while we address the application to 3D simulated and observed data sets to the companion paper.
description: A higher resolution version is available at http://www.iap.fr/users/sousbie together with complementary material. Submitted to MNRAS