cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Confirmation of general relativity on large scales from weak lensing and galaxy velocities
Creators: name: Reyes, Reinabelle
name: Mandelbaum, Rachel
name: Seljak, Uros
name: Baldauf, Tobias
name: Gunn, James E.
name: Lombriser, Lucas
name: Smith, Robert E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Although general relativity underlies modern cosmology, its applicability on cosmological length scales has yet to be stringently tested. Such a test has recently been proposed, using a quantity, EG, that combines measures of large-scale gravitational lensing, galaxy clustering and structure growth rate. The combination is insensitive to 'galaxy bias' (the difference between the clustering of visible galaxies and invisible dark matter) and is thus robust to the uncertainty in this parameter. Modified theories of gravity generally predict values of EG different from the general relativistic prediction because, in these theories, the 'gravitational slip' (the difference between the two potentials that describe perturbations in the gravitational metric) is non-zero, which leads to changes in the growth of structure and the strength of the gravitational lensing effect3. Here we report that EG = 0.39 +/- 0.06 on length scales of tens of megaparsecs, in agreement with the general relativistic prediction of EG $\approx$ 0.4. The measured value excludes a model within the tensor-vector-scalar gravity theory, which modifies both Newtonian and Einstein gravity. However, the relatively large uncertainty still permits models within f(R) theory, which is an extension of general relativity. A fivefold decrease in uncertainty is needed to rule out these models.
description: Submitted version; 13 pages, 2 figures. Accepted version and supplementary material are available at: http://www.nature.com/nature/journal/v464/n7286/full/nature08857.html.
Anacroneuria kariri Righi-Cavallaro & Lecci
Creators: name: Duarte, Tácio
name: Lecci, Lucas Silveira
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Anacroneuria
Anacroneuria kariri

description: Anacroneuria kariri Righi-Cavallaro & Lecci
 Anacroneuria kariri Righi-Cavallaro & Lecci in Righi-Cavallaro et al., 2013: 7 -8.
 Material examined. BR, BA: Andaraí, Igatu, Rio Água Boa, 12°53'33.7''S, 41°18'58.3''W, 664m, 11.iii.2011, light, ARC, PC & AZ, 1 male.
 Remarks. This species was described from Serra do Timbó/BA (municipality of Amargosa/BA). We add new records from Chapada Diamantina (municipality of Andaraí) also in BA.
description: Published as part of Duarte, Tácio & Lecci, Lucas Silveira, 2016, New species and records of Anacroneuria (Plecoptera: Perlidae) from the northeastern semi-arid region of Brazil in Zootaxa 4079 (2) on page 294, DOI: 10.11646/zootaxa.4079.2.10, http://zenodo.org/record/1050599
The structure of thin Lie algebras up to the second diamond
Creators: name: Avitabile, Marina
name: Jurman, Giuseppe
name: Mattarei, Sandro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B50

description: Thin Lie algebras are Lie algebras L, graded over the positive integers, with all homogeneous components of dimension at most two, and satisfying a more stringent but natural narrowness condition modeled on an analogous one for pro-p groups. The two-dimensional homogeneous components of L, which include that of degree one, are named diamonds. Infinite-dimensional thin Lie algebras with various diamond patterns have been produced, over fields of positive characteristic, as loop algebras of suitable finite-dimensional simple Lie algebras, of classical or of Cartan type depending on the location of the second diamond. The goal of this paper is a description of the initial structure of a thin Lie algebra, up to the second diamond. Specifically, if L_k is the second diamond of L, then the quotient L/L^k is a graded Lie algebras of maximal class. In characteristic not two, L/L^k is known to be metabelian, and hence uniquely determined up to isomorphism by its dimension k, which ranges in an explicitly known set of possible values. The quotient L/L^k need not be metabelian in characteristic two. We describe here all the possibilities for L/L^k up to isomorphism. In particular, we prove that k+1 equals a power of two.
description: 35 pages
The Production of English Fricatives by Native Mandarin Speakers
Creators: Zeng, Xiaozhen
Publisher: name: University of Alberta Library
Year: 2023

Learners of English may be influenced by the sounds of their mother tongue when speaking English. This study analyzes the acoustic features of English fricatives, such as the s sound in 'hiss', produced by native Mandarin speakers and native English speakers. This study also investigated how speaker groups differ and discussed the effects of individual variations on acquiring native-like pronunciation, and how their attitude toward second language acquisition factors may affect pronunciation. Analysis revealed native Mandarin speakers can learn and produce English fricatives effectively and are more variable in place of articulation compared to their native English-speaking peers. Participants who rated themselves as highly motivated are more likely to be less satisfied with their pronunciation but produced fricatives less differently than native English speakers.
Five More Massive Binaries in the Cygnus OB2 Association
Creators: name: Kiminki, Daniel. C.
name: Kobulnicky, Henry. A.
name: Gilbert, Ian
name: Bird, Sarah
name: Chunev, Georgi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the orbital solutions for four OB spectroscopic binaries, MT145, GSC 03161-00815, 2MASS J20294666+4105083, and Schulte 73, and the partial orbital solution to the B spectroscopic binary, MT372, as part of an ongoing study to determine the distribution of orbital parameters for massive binaries in the Cygnus OB2 Association. MT145 is a new, single-lined, moderately eccentric (e=0.291+/-0.009) spectroscopic binary with period of 25.140+/-0.008 days. GSC 03161-00815 is a slightly eccentric (e=0.10+/-0.01), eclipsing, interacting and double-lined spectroscopic binary with a period of 4.674+/-0.004 days. 2MASS J20294666+4105083 is a moderately eccentric (e=0.273+/-0.002) double-lined spectroscopic binary with a period of 2.884+/-0.001 days. Schulte 73 is a slightly eccentric (e=0.169+/-0.009), double-lined spectroscopic binary with a period of 17.28+/-0.03 days and the first "twin" in our survey with a mass ratio of q=0.99+/-0.02. MT372 is a single-lined, eclipsing system with a period of 2.228 days and low eccentricity (e~0). Of the now 18 known OB binaries in Cyg OB2, 14 have periods and mass ratios. Emerging evidence also shows that the distribution of log(P) is flat and consistent with Oepik's Law.
description: Accepted to Astronomical Journal
Anacroneuria terere Righi-Cavallaro & Lecci
Creators: name: Duarte, Tácio
name: Lecci, Lucas Silveira
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Anacroneuria
Anacroneuria terere

description: Anacroneuria terere Righi-Cavallaro & Lecci
 Anacroneuria terere Righi-Cavallaro & Lecci, 2010: 37, 40–41.
 Material examined. BR, BA: Curaçá, Recanto Campestre, Rio São Francisco, 08°59'56.7''S, 39°54'56.0''W, 357m, light pan trap, 04.v.2011, DF, 3 males; same data, except for: light pan trap, 06.v.2011, DF, 2 males, 2 females; same data, except for: light trap, 06.v.2011, DF, 1 male; BA, Barreiras, Rio de Janeiro, Cachoeira Acaba Vidas, 11°53'673''S, 45°36'096''W, 722m, 14.x.2008, ARC, RM & SM, 1 male.
 Remarks. Righi-Cavallaro & Lecci (2010) described the species from Chapadão do Sul (State of Mato Grosso do Sul). We present the first records of the species from Brazilian Northeast and State of Bahia (municipality of Curaçá/BA and Barreiras/BA).
description: Published as part of Duarte, Tácio & Lecci, Lucas Silveira, 2016, New species and records of Anacroneuria (Plecoptera: Perlidae) from the northeastern semi-arid region of Brazil in Zootaxa 4079 (2) on page 294, DOI: 10.11646/zootaxa.4079.2.10, http://zenodo.org/record/1050599
Distribution-free cumulative sum control charts using bootstrap-based control limits
Creators: name: Chatterjee, Snigdhansu
name: Qiu, Peihua
Publisher: name: arXiv
Year: 2009
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: This paper deals with phase II, univariate, statistical process control when a set of in-control data is available, and when both the in-control and out-of-control distributions of the process are unknown. Existing process control techniques typically require substantial knowledge about the in-control and out-of-control distributions of the process, which is often difficult to obtain in practice. We propose (a) using a sequence of control limits for the cumulative sum (CUSUM) control charts, where the control limits are determined by the conditional distribution of the CUSUM statistic given the last time it was zero, and (b) estimating the control limits by bootstrap. Traditionally, the CUSUM control chart uses a single control limit, which is obtained under the assumption that the in-control and out-of-control distributions of the process are Normal. When the normality assumption is not valid, which is often true in applications, the actual in-control average run length, defined to be the expected time duration before the control chart signals a process change, is quite different from the nominal in-control average run length. This limitation is mostly eliminated in the proposed procedure, which is distribution-free and robust against different choices of the in-control and out-of-control distributions.
description: Published in at http://dx.doi.org/10.1214/08-AOAS197 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Application and methodical strategy of HACCP in Meat Plant
Creators: name: Dr. Anil Kumar
Publisher: name: The Science world a Monthly e magazine
Year: 2023

description: Livestock production is an essential rural activity that gives farmers, rural poorer and weaker sectors of society, and others a means of livelihood and income. In India, the meat industry is significant because it not only produces flesh and its byproducts for human consumption but also helps millions of men and women from lower socioeconomic classes secure stable livelihoods through sustainable livestock development. A protocol for the Hazard Analysis Critical Control Point system should be included in any protocol for a modern technologically based food security mechanism. HACCP is widely recognized as the ideal method for ensuring the safety of our foods, including beef. Products made from meat and poultry are important contributors to foodborne disease. The incidence of foodborne disease may be significantly reduced as a result of improvements in the handling and preparation of meat and poultry products. A methodical strategy to accomplish this goal is offered by the hazard analysis critical control point (HACCP) idea. HACCP became crucial for producing local foods that came near to being completely guaranteed
Building back better from COVID-19: Knowledge, emergence and social contracts.
Creators: name: Pelling, Mark
name: Adams, Helen
name: Adamson, George
name: Barcena, Alejandro
name: Blackburn, Sophie
name: Borie, Maud
name: Donovan, Amy
name: Ogra, Anshu
name: Taylor, Faith
name: Yi, Lu
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Articles
COVID-19
disaster
build back better
emergence
science and technology studies
social contracts

description: COVID-19 recovery is an opportunity to enhance life chances by Building Back Better, an objective promoted by the UN and deployed politically at national level. To help understand emergent and intentional opportunities to Build Back Better, we propose a research agenda drawing from geographical thinking on social contracts, assemblage theory and the politics of knowledge. This points research towards the ways in which everyday and professional knowledge cocreation constrains vision and action. Whose knowledge is legitimate, how legitimacy is ascribed and the place of science, the media and government in these processes become sites for progressive Building Back Better.
description: ERC
Limits on Superconductivity-Related Magnetization in Sr$_2$RuO$_4$ and PrOs$_4$Sb$_{12}$ from Scanning SQUID Microscopy
Creators: name: Hicks, Clifford W.
name: Kirtley, John R.
name: Lippman, Thomas M.
name: Koshnick, Nicholas C.
name: Huber, Martin E.
name: Maeno, Yoshiteru
name: Yuhasz, William M.
name: Maple, M. Brian
name: Moler, Kathryn A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present scanning SQUID microscopy data on the superconductors Sr2RuO4 (Tc = 1.5 K) and PrOs$_4$Sb$_{12}$ (Tc = 1.8 K). In both of these materials, superconductivity-related time-reversal symmetry-breaking fields have been observed by muon spin rotation; our aim was to visualize the structure of these fields. However in neither Sr$_2$RuO$_4$ nor PrOs$_4$Sb$_{12}$ do we observe spontaneous superconductivity-related magnetization. In Sr$_2$RuO$_4$, many experimental results have been interpreted on the basis of a $px \pm ipy$ superconducting order parameter. This order parameter is expected to give spontaneous magnetic induction at sample edges and order parameter domain walls. Supposing large domains, our data restrict domain wall and edge fields to no more than ~0.1% and ~0.2% of the expected magnitude, respectively. Alternatively, if the magnetization is of the expected order, the typical domain size is limited to ~30 nm for random domains, or ~500 nm for periodic domains.
description: 8 pages, 7 figures. Submitted to Phys. Rev. B
Supplemental figures and tables "Development of a synbiotic that protects against ovariectomy induced trabecular bone loss," (E-00366-2021R1)
Creators: name: Sjogren, Klara
Publisher: name: figshare
Year: 2022
Subjects: subject: Diseases
subject: 111712 Health Promotion
subject: FOS: Health sciences
subject: 110107 Metabolic Medicine
subject: FOS: Clinical medicine
subject: 111103 Nutritional Physiology
subject: 111716 Preventive Medicine

description: Supplemental figures and tables for the article:
Development of a synbiotic that protects against ovariectomy induced trabecular bone loss
Lina Lawenius1, Karin L. Gustafsson1, Jianyao Wu1, Karin H. Nilsson1, Sofia Movérare-Skrtic1, Eric M. Schott2, Maria J. Soto-Girón2, Gerardo V. Toledo2, Klara Sjögren1*# and Claes Ohlsson1, 3# *Corresponding author #These authors jointly supervised this work.
1 Sahlgrenska Osteoporosis Centre, Centre for Bone and Arthritis Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden. 2 Solarea Bio, Cambridge, Massachusetts, USA. 3 Region Västra Götaland, Sahlgrenska University Hospital, Department of Drug Treatment, Gothenburg, Sweden
Multi-frequency control pulses for multi-level superconducting quantum circuits
Creators: name: Forney, Anne M.
name: Jackson, Steven R.
name: Strauch, Frederick W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Superconducting quantum circuits, such as the superconducting phase qubit, have multiple quantum states that can interfere with ideal qubit operation. The use of multiple frequency control pulses, resonant with the energy differences of the multi-state system, is theoretically explored. An analytical method to design such control pulses is developed, using a generalization of the Floquet method to multiple frequency controls. This method is applicable to optimizing the control of both superconducting qubits and qudits, and is found to be in excellent agreement with time-dependent numerical simulations.
description: 11 pages, 6 figures
Molecular Rings and the Thickness of Star-Forming Clouds
Creators: name: Beaumont, Christopher N.
name: Williams, Jonathan P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The winds and radiation from massive stars clear out large cavities in the interstellar medium. These bubbles, as they have been called, impact their surrounding molecular clouds and may influence the formation of stars therein. Here we present JCMT observations of the J=3-2 line of CO in 43 bubbles identified with Spitzer Space Telescope observations. These spectroscopic data reveal the three-dimensional structure of the bubbles. In particular, we show that the cold gas lies in a ring, not a sphere, around the bubbles indicating that the parent molecular clouds are flattened with a typical thickness of a few parsecs. We also mapped 7 bubbles in the J=4-3 line of HCO+ and find that the column densities inferred from the CO and HCO+ line intensities are below that necessary for "collect and collapse" models of induced star formation. We hypothesize that the flattened molecular clouds are not greatly compressed by expanding shock fronts, which may hinder the formation of new stars.
description: 10 pages, 8 figures, 4 tables. ApJ in press. An extended version of Figure 1 can be found at http://www.ifa.hawaii.edu/users/beaumont/bubbles/fig1_extended.pdf
Influence of rurality when accessing emergency healthcare during exacerbation of asthma: A scoping review
Creators: name: Sutton, Clare
name: Anderson, Judith
name: Stoneley, Alannah
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Public Health Education and Promotion
subject: Medical Education
subject: Environmental Public Health
subject: Public Health
subject: Medicine and Health Sciences

description: Asthma is one of the largest contributors of respiratory illness throughout Australia. 11% of the Australian population is affected by asthma with a large amount of those residing in rural and remote locations. With fewer asthma related deaths occurring in major cities it’s important to investigate the extent living in rural and remote areas affects the decision making of patients accessing emergency healthcare. The aim of this review is to highlight the difference in circumstances between metropolitan and rural and remote Australia in accessing emergency care during a moderate to severe asthma exacerbation.
Modeling Changes in Probability of Presence of Myotis lucifugus Due to White Nose Syndrome: An Introduction to Logistic Regression in R
Creators: name: Roseblock, Mary
Publisher: name: QUBES Educational Resources
Year: 2023

description: In this lesson, students will learn more about the wildlife disease known as white nose syndrome and how it affects certain bat species more than others. Students will learn about the important ecosystem services bats provide and why bat conservation is important to overall ecosystem health. To demonstrate the negative impacts of WNS on Myotis lucifugus, students will learn how to fit a logistic regression model in R and analyze how the probability of catching this species has decreased since the introduction of WNS in West Virginia. Students will evaluate the fit of the model using a diagnostic plot and the summary output, and they will learn how to interpret the coefficients. This lesson contains a short video introduction, student and instructor handouts, the curated data, and annotated student and instructor versions of the R code. The R-markdown and the lesson handout provide a step-by-step tutorial on how to do a logistic regression in R. The handouts are intended to compliment the original paper, and students will be prompted to answer questions about the paper itself and the R code.
Explicit demonstration of the equivalence between DFT+U and the Hartree-Fock limit of DFT+DMFT
Creators: name: Carta, Alberto
name: Timrov, Iurii
name: Mlkvik, Peter
name: Hampel, Alexander
name: Ederer, Claude
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Several methods have been developed to improve the predictions of density functional theory (DFT) in the case of strongly correlated electron systems. Out of these approaches, DFT+$U$, which corresponds to a static treatment of the local interaction, and DFT combined with dynamical mean field theory (DFT+DMFT), which considers local fluctuations, have both proven incredibly valuable in tackling the description of materials with strong local electron-electron interactions. While it is in principle known that the Hartree-Fock (HF) limit of the DFT+DMFT approach should recover DFT+$U$, demonstrating this equivalence in practice is challenging, due to the very different ways in which the two approaches are generally implemented. In this work, we introduce a way to perform DFT+$U$ calculations in Quantum ESPRESSO using Wannier functions as calculated by Wannier90, which allows us to use the same Hubbard projector functions both in DFT+$U$ and in DFT+DMFT. We benchmark these DFT+$U$ calculations against DFT+DMFT calculations where the DMFT impurity problem is solved within the HF approximation. Considering a number of prototypical materials including NiO, MnO, LaMnO$_3$, and LuNiO$_3$, we establish the sameness of the two approaches. Finally, we showcase the versatility of our approach by going beyond the commonly used atomic orbital-like projectors by performing DFT+$U$ calculations for VO$_2$ using a special set of bond-centered Wannier functions.
REDUCING THE ENERGY CONSUMPTION OF MATERIALS USED IN HEATING DEVICES
Creators: name: Khakimov Temurbek Bohodirjon ogli Andijan Institute of Mechanical Engineering
Publisher: name: Zenodo
Year: 2023

description: In this article, we will study about the rational and correct use of materials used in heating devices and foreign technologies for the proposed model.
Key words: Heat supply, power plant heat transfer. heat and electricity.
The right to food matters : implementing the constitutional right to food in Mexico and Bolivia
Creators: name: Castrejón Violante, Laura Patricia
Publisher: name: University of British Columbia
Year: 2024

description: Food systems are at the epicenter of our environmental, equity and health crises. One way for addressing these interconnected challenges is the implementation of the human right to food. This research explores practical implications of explicitly including the right to food within state constitutions—a concept widely discussed in academia at a theoretical level but less examined empirically. Drawing on 30 countries that have recognized this right in their constitutions, this dissertation focuses on the strongest candidates: Mexico and Bolivia. This research developed a novel joined-up analytical framework, a comparative case study approach, and predominantly employs qualitative methods to evaluate the impact of a constitutional right to food on national-level legislation, policies, and court decisions. The findings reveal that the constitutional inclusion of the right to food is an effective way to advance the right’s realization. In Mexico and Bolivia the constitutional inclusion has triggered governmental actions to implement and extend the right to food beyond general constitutional principles. In Mexico, seven laws and five public policies have been enacted, accompanied by five court decisions addressing the right to food. Similarly, Bolivia has had four laws, six public policies, and three court decisions. Notably, in both countries, the three branches of government have exhibited a comprehensive understanding of the right to food. Governmental efforts to implement the right to food have considered key aspects of the right, including accountability and remedy, accessibility and availability, equity, environmental sustainability, health, procedural rights, and business responsibilities. However, despite these positive developments, legal gaps and systemic implementation challenges persist, hindering the potential of the right to food as an effective solution. Crucial right to food topics such as food loss and waste, protection for certain vulnerable populations, and social protection remain unaddressed. Furthermore, both countries face significant implementation challenges, which could explain the substantial gap between right to food promises and actual delivery. These findings highlight the need for ongoing scrutiny of human rights including right to food implementation research.
A factorization theorem for classical group characters, with applications to plane partitions and rhombus tilings
Creators: name: Ciucu, Mihai
name: Krattenthaler, Christian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 05E15 (Primary); 05A15 05A17 05A19 05B45 11P81 20C15 20G05 52C20 (Secondary)

description: We prove that a Schur function of rectangular shape $(M^n)$ whose variables are specialized to $x_1,x_1^{-1},...,x_n,x_n^{-1}$ factorizes into a product of two odd orthogonal characters of rectangular shape, one of which is evaluated at $-x_1,...,-x_n$, if $M$ is even, while it factorizes into a product of a symplectic character and an even orthogonal character, both of rectangular shape, if $M$ is odd. It is furthermore shown that the first factorization implies a factorization theorem for rhombus tilings of a hexagon, which has an equivalent formulation in terms of plane partitions. A similar factorization theorem is proven for the sum of two Schur functions of respective rectangular shapes $(M^n)$ and $(M^{n-1})$.
description: 20 pages, AmS-TeX
Coordination of Tetracyanoquinodimethane-Derivatives with Tris(pentafluorophenyl)borane Provides Stronger p-Dopants with Enhanced Stability
Creators: name: Mansour, Ahmed E.
name: Warren, Ross
name: Lungwitz, Dominique
name: Forster, Michael
name: Scherf, Ullrich
name: Opitz, Andreas
name: Malischewski, Moritz
name: Koch, Norbert
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: organic semiconductor
subject: doping
subject: dopants
subject: thin films
subject: charge transport
subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten

description: Strong molecular dopants for organic semiconductors that are stable against diffusion are in demand, enhancing the performance of organic optoelectronic devices. The conventionally used p-dopants based on 7,7,8,8-tetracyanoquinodimethane (TCNQ) and its derivatives “FxTCN(N)Q”, such as 2,3,4,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) and 1,3,4,5,7,8-hexafluorotetracyano-naphthoquinodimethane (F6TCNNQ), feature limited oxidation strength, especially for modern polymer semiconductors with high ionization energy (IE). These small molecular dopants also exhibit pronounced diffusion in the polymer hosts. Here, we demonstrate a facile approach to increase the oxidation strength of FxTCN(N)Q by coordination with four tris(pentafluorophenyl)borane (BCF) molecules using a single-step solution mixing process, resulting in bulky dopant complexes “FxTCN(N)Q-4(BCF)”. Using a series of polymer semiconductors with IE up to 5.9 eV, we show by optical absorption spectroscopy of solutions and thin films that the efficiency of doping using FxTCN(N)Q-4(BCF) is significantly higher compared to that using FxTCN(N)Q or BCF alone. Electrical transport measurements with the prototypical poly(3-hexylthiophene-2,5-diyl) (P3HT) confirm the higher doping efficiency of F4TCNQ-4(BCF) compared to F4TCNQ. Additionally, the bulkier structure of F4TCNQ-4(BCF) is shown to result in higher stability against drift in P3HT under an applied electric field as compared to F4TCNQ. The simple approach of solution-mixing of readily accessible molecules thus offers access to enhanced molecular p-dopants for the community.
SN 2008S: an electron capture SN from a super-AGB progenitor?
Creators: name: Botticella, M. T.
name: Pastorello, A.
name: Smartt, S. J.
name: Meikle, W. P. S.
name: Benetti, S.
name: Kotak, R.
name: Cappellaro, E.
name: Crockett, R. M.
name: Mattila, S.
name: Sereno, M.
name: Patat, F.
name: Tsvetkov, D.
name: Van Loon, J. Th.
name: Abraham, D.
name: Agnoletto, I.
name: Arbour, R.
name: Benn, C.
name: Di Rico, G.
name: Elias-Rosa, N.
name: Gorshanov, D. L.
name: Harutyunyan, A.
name: Hunter, D.
name: Lorenzi, V.
name: Keenan, F. P.
name: Maguire, K.
name: Mendez, J.
name: Mobberley, M.
name: Navasardyan, H.
name: Ries, C.
name: Stanishev, V.
name: Taubenberger, S.
name: Trundle, C.
name: Turatto, M.
name: Volkov, I. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present comprehensive photometric and spectroscopic observations of the faint transient SN 2008S discovered in NGC 6946. SN 2008S exhibited slow photometric evolution and almost no spectral variability during the first nine months, implying a high density CS medium. The light curve is similar in shape to that of SN 1998S and SN 1979C, although significantly fainter at maximum light. Our quasi-bolometric lightcurve extends to 300 days and shows a tail phase decay rate consistent with that of ^{56}Co. We propose that this is evidence for an explosion and formation of ^{56}Ni (0.0015 +/- 0.0004 M_Sun). The large MIR flux detected shortly after explosion can be explained by a light echo from pre-exisiting dust. The late NIR flux excess is plausibly due to a combination of warm newly-formed ejecta dust together with shock-heated dust in the CS environment. We reassess the progenitor object detected previously in Spitzer archive images, supplementing this discussion with a model of the MIR spectral energy distribution. This supports the idea of a dusty, optically thick shell around SN 2008S with an inner radius of nearly 90AU and outer radius of 450AU, and an inferred heating source of 3000 K and luminosity of L ~ 10^{4.6} L_Sun. The combination of our monitoring data and the evidence from the progenitor analysis leads us to support the scenario of a weak electron capture supernova explosion in a super-AGB progenitor star (of initial mass 6-8 M_sun) embedded within a thick CS gaseous envelope. We suggest that all of main properties of the electron capture SN phenomenon are observed in SN 2008S and future observations may allow a definitive answer.
description: accepted for publication in MNRAS (2009 May 7)
Intrinsic transverse parton momenta in deeply inelastic reactions
Creators: name: Schweitzer, P.
name: Teckentrup, T.
name: Metz, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Intrinsic transverse parton momenta pT play an important role in the understanding of azimuthal/spin asymmetries in semi-inclusive deep-inelastic scattering (SIDIS) and the Drell-Yan process (DY). We review and update what is presently known about pT from these processes. In particular, we address the question to which extent data support the popular Gauss model for the pT-distributions. We find that the Gauss model works very well, and observe that the intrinsic transverse momenta in SIDIS and DY are compatible, which is a support for the factorization approach. As a byproduct we recover a simple but practical way of taking into account the energy dependence of pT-distributions.
description: 19 pages, 11 figures
Stellar Ages and Metallicities of Central and Satellite Galaxies: Implications for Galaxy Formation and Evolution
Creators: name: Pasquali, Anna
name: Gallazzi, Anna
name: Fontanot, Fabio
name: Bosch, Frank C. van den
name: De Lucia, Gabriella
name: Mo, H. J.
name: Yang, Xiaohu
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using a large SDSS galaxy group catalogue, we study how the stellar ages and metallicities of central and satellite galaxies depend on stellar mass and halo mass. We find that satellites are older and metal-richer than centrals of the same stellar mass. In addition, the slopes of the age-stellar mass and metallicity-stellar mass relations are found to become shallower in denser environments. This is due to the fact that the average age and metallicity of low mass satellite galaxies increase with the mass of the halo in which they reside. A comparison with the semi-analytical model of Wang et al. (2008) shows that it succesfully reproduces the fact that satellites are older than centrals of the same stellar mass and that the age difference increases with the halo mass of the satellite. This is a consequence of strangulation, which leaves the stellar populations of satellites to evolve passively, while the prolonged star formation activity of centrals keeps their average ages younger. The resulting age offset is larger in more massive environments because their satellites were accreted earlier. The model fails, however, in reproducing the halo mass dependence of the metallicities of low mass satellites, yields metallicity-stellar mass and age-stellar mass relations that are too shallow, and predicts that satellite galaxies have the same metallicities as centrals of the same stellar mass, in disagreement with the data. We argue that these discrepancies are likely to indicate the need to (i) modify the recipes of both supernova feedback and AGN feedback, (ii) use a more realistic description of strangulation, and (iii) include a proper treatment of the tidal stripping, heating and destruction of satellite galaxies. [Abridged]
description: 20 pages, 12 figures, submitted for publication in MNRAS
Resonance amplification of left-handed transmission at optical frequencies by stimulated emission of radiation in active metamaterials
Creators: name: Dong, Zheng-Gao
name: Liu, Hui
name: Li, Tao
name: Zhu, Zhi-Hong
name: Wang, Shu-Ming
name: Cao, Jing-Xiao
name: Zhu, Shi-Ning
name: Zhang, X.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We demonstrate that left-handed resonance transmission from metallic metamaterial, composed of periodically arranged double rings, can be extended to visible spectrum by introducing an active medium layer as the substrate. The severe ohmic loss inside metals at optical frequencies is compensated by stimulated emission of radiation in this active system. Due to the resonance amplification mechanism of recently proposed lasing spaser, the left-handed transmission band can be restored up to 610 nm wavelength, in dependence on the gain coefficient of the active layer. Additionally, threshold gains for different scaling levels of the double-ring unit are investigated to evaluate the gain requirement of left-handed transmission restoration at different frequency ranges.
description: 12 pages, 5 figures
Exact Pair Production Rate for a Smooth Potential Step
Creators: name: Chervyakov, A.
name: Kleinert, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the exact rate of pair production of oppositely charged scalar particles by a smooth potential proportional to tanh kz in three dimensions. As a check we recover from this the known results for an infinitely sharp step as well as for a uniform electric field.
description: Removed the labels and improved the paper
STUDYING THE RESISTANCE OF PHOTORESISTORS THROUGH LIGHT INTENSITY
Creators: name: Shamshiddinov Muhiddin Kadirjonovich Doctoral student of Andijan machine building institute
name: Alijanov Donyorbek Dilshodovich Associate Professor of Andijan machine building institute
name: Komilov Murodjon Doctoral student of Andijan State University
Publisher: name: Zenodo
Year: 2023

description: research paper provides an overview of the light sensitivity of photoresistors used in photosensors that detect the position of the sun in solar collectors, photovoltaic modules, and other devices.
 
Keywords:
 resistance, intensity, light, sun, photoresistor, photosensor, photovoltaic power stations
Spectral matrix methods for partitioning power grids: Applications to the Italian and Floridian high-voltage networks
Creators: name: Hamad, Ibrahim Abou
name: Israels, Brett
name: Rikvold, Per Arne
name: Poroseva, Svetlana V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Intentional islanding is used to limit cascading power failures by isolating highly connected "islands" with local generating capacity. To efficiently isolate an island, one should break as few power lines as possible. This is a graph partitioning problem, and here we give preliminary results on islanding of the Italian and Floridian high-voltage grids by spectral matrix methods.
description: 4 pages, 2 figures.
Robust Nonprehensile Object Transportation with Uncertain Inertial Parameters
Creators: name: Heins, Adam
name: Schoellig, Angela P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We consider the nonprehensile object transportation task known as the waiter's problem - in which a robot must move an object on a tray from one location to another - when the transported object has uncertain inertial parameters. In contrast to existing approaches that completely ignore uncertainty in the inertia matrix or which only consider small parameter errors, we are interested in pushing the limits of the amount of inertial parameter uncertainty that can be handled. We first show how constraints that are robust to inertial parameter uncertainty can be incorporated into an optimization-based motion planning framework to transport objects while moving quickly. Next, we develop necessary conditions for the inertial parameters to be realizable on a bounding shape based on moment relaxations, allowing us to verify whether a trajectory will violate the constraints for any realizable inertial parameters. Finally, we demonstrate our approach on a mobile manipulator in simulations and real hardware experiments: our proposed robust constraints consistently successfully transport a 56 cm tall object with substantial inertial parameter uncertainty in the real world, while the baseline approaches drop the object while transporting it.
description: 8 pages, 7 figures. Published in IEEE Robotics and Automation Letters
Numerical Simulation of Microplastics Transport in a Part of Fraser River and Detection of Accumulation Zones Based on Clustering Methods
Creators: name: Babajamaaty, Golnoosh
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: Microplastics
Hydrodynamic modeling
Particle tracking
Machine learning
Clustering

description: Microplastics are tiny particles that due to their small size, durability, and widespread usage have become a huge threat to the world and the environment. Aquatic environments like rivers and oceans have faced some irreparable problems such as the extinction of various marine species. Field sampling and numerical modeling are two methods that can help researchers have a better understanding of the situations to come up with the best solutions. Machine learning methods have drawn considerable attention in most engineering fields recently, which can be used in conjunction with field sampling and numerical simulation. In this study, by generating a fine mesh and using bathymetry, water level, and discharge data, a three-dimensional hydrodynamic modeling of the domain of study was conducted using TELEMAC 3D, which is a model that was used to simulate the behavior of the Fraser River in x, y, and z directions. The results were implemented to track the movements of microplastic particles in the lower part of the Fraser River. CaMPSim-3D, which is a three-dimensional Lagrangian particle tracking model was employed to track microplastic particles. This model, in addition to calculating the horizontal location of particles, computes their vertical movements too. The release locations of microplastic particles were chosen based on the locations of the wastewater treatment plants and combined sewer overflows and in the end, nine scenarios were conducted for this study. An unsupervised branch of machine learning is clustering which helps to cluster points by relying on their different properties. The OPTICS algorithm, which is a density-based clustering algorithm, was used to find the accumulation zones of microplastic particles in the lower part of the Fraser River. It should be mentioned that in all parts available measured data and information were used for validation. The results of the clustering algorithm indicated that there are eight accumulation zones in the study area and the breakwater in the upper branch of the Fraser River is an ideal place for microplastic particles to accumulate. A reasonable agreement was obtained between the model results and measured data.
A convex polynomial that is not sos-convex
Creators: name: Ahmadi, Amir Ali
name: Parrilo, Pablo A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: A multivariate polynomial $p(x)=p(x_1,...,x_n)$ is sos-convex if its Hessian $H(x)$ can be factored as $H(x)= M^T(x) M(x)$ with a possibly nonsquare polynomial matrix $M(x)$. It is easy to see that sos-convexity is a sufficient condition for convexity of $p(x)$. Moreover, the problem of deciding sos-convexity of a polynomial can be cast as the feasibility of a semidefinite program, which can be solved efficiently. Motivated by this computational tractability, it has been recently speculated whether sos-convexity is also a necessary condition for convexity of polynomials. In this paper, we give a negative answer to this question by presenting an explicit example of a trivariate homogeneous polynomial of degree eight that is convex but not sos-convex. Interestingly, our example is found with software using sum of squares programming techniques and the duality theory of semidefinite optimization. As a byproduct of our numerical procedure, we obtain a simple method for searching over a restricted family of nonnegative polynomials that are not sums of squares.
description: 15 pages
Giving Dad the Spotlight: Paternal Experiences of Raising a Child with Cerebral Palsy: How Does This Influence Fatherhood Trajectory and the Meaning of Fatherhood?
Creators: name: Seguin, Kelsey
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: subject: Cerebral Palsy
subject: Fatherhood
subject: Life Course
subject: Sociology
subject: FOS: Sociology
subject: Qualitative
subject: Critical Disability Studies
subject: Kinship Imaginaries

description: For approximately the last 45 years, researchers have examined a standardized pathway for an individual’s life course, involving leaving the parents’ home, building a stable career, getting married, having children, followed by retirement and death. Contrary to what was been previously discovered, the life course is no longer considered as linear as it was once thought to be. This statement has been further investigated and proven more specifically among families of children with special needs. This Master’s thesis reviews the perspective of 11 (eleven) fathers of children with cerebral palsy located in Canada and in the United States. Fathers voluntarily participated in a qualitative 90-minute qualitative structured interview, followed by the construction of a historical timeline of key events pertaining to their journey to becoming a father. Qualitative analyses consisted of a content analysis to investigate how fatherhood is constructed and the experiences of being a father to a child with cerebral palsy consist of. In essence, becoming a father to a child with cerebral palsy is an extremely emotional experience as complex and continuous feelings emerge in those transitioning into fatherhood.
Big Bang Nucleosynthesis with Independent Neutrino Distribution Functions
Creators: name: Smith, Christel J.
name: Fuller, George M.
name: Smith, Michael S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have performed new Big Bang Nucleosynthesis calculations which employ arbitrarily-specified, time-dependent neutrino and antineutrino distribution functions for each of up to four neutrino flavors. We self-consistently couple these distributions to the thermodynamics, the expansion rate and scale factor-time/temperature relationship, as well as to all relevant weak, electromagnetic, and strong nuclear reaction processes in the early universe. With this approach, we can treat any scenario in which neutrino or antineutrino spectral distortion might arise. These scenarios might include, for example, decaying particles, active-sterile neutrino oscillations, and active-active neutrino oscillations in the presence of significant lepton numbers. Our calculations allow lepton numbers and sterile neutrinos to be constrained with observationally-determined primordial helium and deuterium abundances. We have modified a standard BBN code to perform these calculations and have made it available to the community.
description: 9 pages, 5 figures
title: Applying the Wage-Common to Canadian Provinces
title: Étendre l’utilisation de la mesure salaires-comm aux provinces canadiennes
Creators: name: Lachaine, Jonathan
Publisher: name: Bank of Canada
Year: 2018

description: As at the national level, available sources of hourly wage data for Canadian provinces sometimes send conflicting signals about wage growth. This note has two objectives. First, we develop a common measure of provincial wages (the provincial wage-common) to better capture the underlying wage pressures, reflecting the overall trend across all data sources. Second, we focus on recent wage developments in Quebec, Ontario, Alberta and British Columbia and the relationship between wage growth in these provinces and some macroeconomic drivers. We conclude that a provincial wage-common provides, for the most part, superior estimates than each of the data sources taken individually because of their timeliness, lower volatility and good relationships with fundamentals. A key finding of our analysis is that the wage-common measures of provinces with a strong energy sector, such as Alberta, are more closely correlated with the national measure and are also more sensitive to oil price shocks than the wage-common measures of the other provinces.
description: Comme au niveau national, les sources de données disponibles sur les salaires horaires dans les provinces canadiennes envoient parfois des signaux contradictoires quant à leur croissance. La présente note comporte donc deux objectifs : d’abord, nous concevons une mesure commune des salaires provinciaux (salaires-comm), qui rend mieux compte des pressions sous-jacentes exercées sur les salaires et qui reflète la tendance pour l’ensemble des sources de données. Ensuite, nous examinons surtout l’évolution récente des salaires au Québec, en Ontario, en Alberta et en Colombie-Britanique et la relation entre la croissance des salaires de ces provinces et certains déterminants macroéconomiques. Nous arrivons à la conclusion que les mesures de salaires-comm par province sont, pour la plupart, des estimations plus efficaces que chacune des sources de données prise individuellement. Ceci vient du fait que ces nouvelles mesures sont disponibles plus rapidement, elles sont moins volatiles et bien corrélées avec les facteurs fondamentaux. Un résultat clé de l’analyse est que les salaires-comm des provinces où le secteur de l’énergie est fortement présent comme en Alberta sont plus étroitement corrélés avec la mesure nationale et sont aussi plus sensibles aux chocs du prix du pétrole que les autre provinces.