cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
AEGIS: Enhancement of Dust-enshrouded Star Formation in Close Galaxy Pairs and Merging Galaxies up to z ~ 1
Creators: name: Lin, Lihwai
name: Koo, David C.
name: Weiner, Benjamin J.
name: Chiueh, Tzihong
name: Coil, Alison L.
name: Lotz, Jennifer
name: Conselice, Christopher J.
name: Willner, S. P.
name: Smith, H. A.
name: Guhathakurta, Puragra
name: Huang, J. -S.
name: Floc'h, Emeric Le
name: Noeske, Kai G.
name: Willmer, Christopher N. A.
name: Cooper, Michael C.
name: Phillips, Andrew C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using data from the DEEP2 Galaxy Redshift Survey and HST/ACS imaging in the Extended Groth Strip, we select nearly 100 interacting galaxy systems including kinematic close pairs and morphologically identified merging galaxies. Spitzer MIPS 24 micron fluxes of these systems reflect the current dusty star formation activity, and at a fixed stellar mass (M_{*}) the median infrared luminosity (L_{IR}) among merging galaxies and close pairs of blue galaxies is twice (1.9 +/- 0.4) that of control pairs drawn from isolated blue galaxies. Enhancement declines with galaxy separation, being strongest in close pairs and mergers and weaker in wide pairs compared to the control sample. At z ~ 0.9, 7.1% +/- 4.3% of massive interacting galaxies (M_{*} > 2*10^{10} M_{solar}) are found to be ULIRGs, compared to 2.6% +/- 0.7% in the control sample. The large spread of IR luminosity to stellar mass ratio among interacting galaxies suggests that this enhancement may depend on the merger stage as well as other as yet unidentified factors (e.g., galaxy structure, mass ratio, orbital characteristics, presence of AGN or bar). The contribution of interacting systems to the total IR luminosity density is moderate (<= 36 %).
description: 12 pages, 2 figures, 1 table, minor changes to match the proof version, accepted for publication in the ApJL AEGIS Special Issue
The influence of Dissolved Organic Matter on Phytoplankton
Creators: name: Goncalves Morais, Lucas
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 310304
subject: Freshwater ecology
classificationCode: 310701
subject: Bacteriology

description: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Agriculture, Biomedicine and Environment, La Trobe University, Victoria, Australia.
MOESM12 of A lil3 chlp double mutant with exclusive accumulation of geranylgeranyl chlorophyll displays a lethal phenotype in rice
Creators: name: Li, Chunmei
name: Liu, Xin
name: Pan, Jihong
name: Guo, Jia
name: Wang, Qian
name: Chen, Congping
name: Li, Na
name: Zhang, Kuan
name: Yang, Bin
name: Sun, Changhui
name: Deng, Xiaojian
name: Wang, Pingrong
Publisher: name: figshare
Year: 2019
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Developmental Biology
subject: Marine Biology
subject: Plant Biology

description: Additional file 12: Figure S8. Total Chl contents in 502ys and its wild-type (WT) grown under low light (LL) or high light (HL) at constant temperature (23 °C or 30 °C), in mg g fresh weight− 1. Data are shown as mean ± SD. Error bars represent standard deviations of three independent biological replicates. Asterisks indicate statistically significant differences compared with the wild-type at P < 0.01. (PDF 560 kb)
Maternal wellbeing and posttraumatic growth following preterm birth
Creators: name: Newton-Bennett, II
Publisher: name: University of Tasmania
Year: 2024

description: Preterm birth (<37 weeks of gestation) impacts approximately 11.1% of births worldwide, each year (World Health Organization, 2018). Despite extensive research on psychopathology after preterm birth, there is limited research adopting a strengths-based framework evaluating adaptive outcomes. This cross-sectional study aimed to investigate wellbeing and posttraumatic growth in birthing parents of children aged 0 ‚ÄövÑv¨ 9 years, and identify risk and protective factors associated with outcomes. Participants were recruited and completed the study questionnaire online including the Psychological Wellbeing Scale (Ryff & Keyes, 1995) and Posttraumatic Growth Inventory (Tedeschi & Calhoun, 1996). The final sample included 866 birthing parents (n=861 female gender) of children born preterm in infancy-toddlerhood (n=308), early (n=259), and middle childhood (n=299). Results indicated a positive association (p<.001) between wellbeing and posttraumatic growth, and differences in outcomes by child age groups. Caregivers of children in early childhood reported lower wellbeing and posttraumatic growth than those in infancy-toddlerhood and middle childhood. Differential child and sociodemographic risk factors for wellbeing and posttraumatic growth were identified. Findings provide insight into age-related differences in cognitive and affective processes, and risk factors that can be targeted in the development of postnatal care following preterm birth.
Dirichlet and Neumann Problems for String Equation, Poncelet Problem and Pell-Abel Equation
Creators: name: Burskii, Vladimir P.
name: Zhedanov, Alexei S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider conditions for uniqueness of the solution of the Dirichlet or the Neumann problem for 2-dimensional wave equation inside of bi-quadratic algebraic curve. We show that the solution is non-trivial if and only if corresponding Poncelet problem for two conics associated with the curve has periodic trajectory and if and only if corresponding Pell-Abel equation has a solution.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Critical properties of the prethermal Floquet Time Crystal
Creators: name: Natsheh, Muath
name: Gambassi, Andrea
name: Mitra, Aditi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The critical properties characterizing the formation of the Floquet time crystal in the prethermal phase are investigated analytically in the periodically driven $O(N)$ model. In particular, we focus on the critical line separating the trivial phase with period synchronized dynamics and absence of long-range spatial order from the non-trivial phase where long-range spatial order is accompanied by period-doubling dynamics. In the vicinity of the critical line, with a combination of dimensional expansion and exact solution for $N\to\infty$, we determine the exponent $ν$ that characterizes the divergence of the spatial correlation length of the equal-time correlation functions, the exponent $β$ characterizing the growth of the amplitude of the order-parameter, as well as the initial-slip exponent $θ$ of the aging dynamics when a quench is performed from deep in the trivial phase to the critical line. The exponents $ν, β, θ$ are found to be identical to those in the absence of the drive. In addition, the functional form of the aging is found to depend on whether the system is probed at times that are small or large compared to the drive period. The spatial structure of the two-point correlation functions, obtained as a linear response to a perturbing potential in the vicinity of the critical line, is found to show algebraic decays that are longer ranged than in the absence of a drive, and besides being period-doubled, are also found to oscillate in space at the wave-vector $ω/(2 v)$, $v$ being the velocity of the quasiparticles, and $ω$ being the drive frequency.
Extended care nurses’ knowledge about sudden onset confusion in the elderly
Creators: name: Amdam, J. Lori
Publisher: name: University of British Columbia
Year: 2008

description: The sudden onset of confusion in an elderly client requires accurate and expeditious nursing assessment. If the cause of the confusion is identified and treated, irreversible deterioration of the client's mental functioning may be prevented. Studies have suggested that nurses lack adequate assessment skills and knowledge about the causes of sudden onset confusion. This descriptive study was designed to measure the knowledge possessed by registered nurses working in British Columbia Extended Care units about the causes of sudden onset confusion in the elderly. Relationships between knowledge scores and specific characteristics of the subjects (age, type of preparatory and additional nursing education, and length of experience in long term care nursing) were also examined. A random sample of 130 British Columbia registered nurses working in Extended Care Units was generated by the Registered Nurses Association of British Columbia(R.N.A.B.C.) data bank. A questionnaire which tested knowledge about causes of confusion and a demographic form were mailed to each subject. Sixty eight percent completed questionnaires were returned for a response rate of 52%. Of those, 62 were fully completed and appropriate for inclusion in data analysis. Sixty six percent of the respondents returned a coupon indicating their desire to receive a summary of the research study when it was completed. The nurses' test scores were analyzed to determine their knowledge about confusion and correlations between test scores and demographic characteristics were explored. The highest score possible on the confusion questionnaire was 15. Test results of subjects ranged from a high of 15 to a low of 5, with the mean being12.6 (M = 12.6, SD = 2.3). Although the majority of nurses scored higher than the mean, some subjects obtained scores of less than 50%. Knowledge scores were seemingly unaffected by demographic characteristics. For example, no relationship was found between the subjects' knowledge about confusion and their age, education, or length of experience in long term care nursing. Based on the findings of this study, implications for nursing practice, education, and administration are proposed. Recommendations for further research are also made.
Floating tunable coupler for scalable quantum computing architectures
Creators: name: Sete, Eyob A.
name: Chen, Angela Q.
name: Manenti, Riccardo
name: Kulshreshtha, Shobhan
name: Poletto, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a floating tunable coupler that does not rely on direct qubit-qubit coupling capacitances to achieve the zero-coupling condition. We show that the polarity of the qubit-coupler couplings can be engineered to offset the otherwise constant qubit-qubit coupling and attain the zero-coupling condition when the coupler frequency is above or below the qubit frequencies. We experimentally demonstrate these two operating regimes of the tunable coupler by implementing symmetric and asymmetric configurations of the coupler's superconducting pads with respect to the qubits. Such a floating tunable coupler provides flexibility in designing large-scale quantum processors while reducing the always-on residual couplings.
description: 12 pages, and 7 figures; published version
Odin observations of the Galactic centre in the 118-GHz band. Upper limit to the O2 abundance
Creators: name: Sandqvist, Aa.
name: Larsson, B.
name: Hjalmarson, Å.
name: Bergman, P.
name: Bernath, P.
name: Frisk, U.
name: Olberg, M.
name: Pagani, L.
name: Ziurys, L. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Odin satellite has been used to search for the 118.75-GHz line of molecular oxygen (O2)in the Galactic centre. Odin observations were performed towards the Sgr A* circumnuclear disk (CND), and the Sgr A +20 km/s and +50 km/s molecular clouds using the position-switching mode. Supplementary ground-based observations were carried out in the 2-mm band using the ARO Kitt Peak 12-m telescope to examine suspected SiC features. A strong emission line was found at 118.27 GHz, attributable to the J=13-12 HC3N line. Upper limits are presented for the 118.75-GHz O2 (1,1-1,0) ground transition line and for the 118.11-GHz 3Pi2, J=3-2 ground state SiC line at the Galactic centre. Upper limits are also presented for the 487-GHz O2 line in the Sgr A +50 km/s cloud and for the 157-GHz, J=4-3, SiC line in the Sgr A +20 and +50 km/s clouds, as well as the CND. The CH3OH line complex at 157.2 - 157.3 GHz has been detected in the +20 and +50 km/s clouds but not towards Sgr A*/CND. A 3-sigma upper limit for the fractional abundance ratio of [O2]/[H2] is found to be X(O2) < 1.2 x 10exp(-7) towards the Sgr A molecular belt region.
description: Accepted for publication in A&A. 6 journal pages, 5 figures
Graph state representation of the toric code
Creators: name: Liao, Pengcheng
name: Feder, David L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Given their potential for fault-tolerant operations, topological quantum states are currently the focus of intense activity. Of particular interest are topological quantum error correction codes, such as the surface and planar stabilizer codes that are equivalent to the celebrated toric code. While every stabilizer state maps to a graph state under local Clifford operations, the graphs associated with topological stabilizer codes remain unknown. We show that the toric code graph is composed of only two kinds of subgraphs: star graphs (which encode Greenberger-Horne-Zeilinger states) and half graphs. The topological order is identified with the existence of multiple star graphs, which reveals a connection between the repetition and toric codes. The graph structure readily yields a log-depth quantum circuit for state preparation, assuming geometrically non-local gates, which can be reduced to a constant depth including ancillae and measurements at the cost of increasing the circuit width. The results provide a new graph-theoretic framework for the investigation of topological order and the development of novel topological error correction codes.
description: 18 pages, 8 figures. One section about encoding arbitrary state into toric code is added
Canadian copyright legislation and archival material
Creators: name: Andrews, Christina Ruth
Publisher: name: University of British Columbia
Year: 2008

description: This thesis analyses the nature and common law history of copyright, highlights the problematic aspects of the current Canadian legislation with respect to archival material, proposes revisions to the law which would take into account the special nature of this material, and provides some suggestions to archivists who have to deal with the copyright dilemmas encountered in the daily, routine administration of an archival institution. Copyright legislation has traditionally grouped archival and library material under one section on special exemptions, notwithstanding the fact that archival material has characteristics which dictate a treatment fundamentally different from that of library material. Therefore, this thesis focuses on copyright as it relates specifically to archival material in order to present recommendations for its adequate treatment under the copyright law. This is not a legal paper, and does not presume to give an exhaustive legal study of all of the ramifications of copyright legislation. It is intended as a review of those copyright issues which are of special interest to archivists. Because Canada derives its common law tradition from Great Britain and is often influenced by American legislation, the earlier British legislation and more recent copyright legislation in the United States and Great Britain are studied and compared to the present Canadian legislation. Because legal trends generally first appear in court decisions before they become codified in statute, decisions found in recent case law, as well as their discussion in current legal literature are examined. The official recommendations which have been made to the Canadian government for the revision of copyright law are also analyzed. It is concluded that the Canadian statute must be revised to reflect the unique nature of archival material. Archival documents are not created for sale, distribution, display, or publication. They are the instruments of transactions, natural by-products of practical activities, means to purposes; they lack the autonomy of final products, and are non-commercial by nature. This thesis recommends that a separate piece of copyright legislation for archival material be introduced to deal effectively with these unique characteristics.
Multi-tracer intensity mapping: Cross-correlations, Line noise & Decorrelation
Creators: name: Schaan, Emmanuel
name: White, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Line intensity mapping (LIM) is a rapidly emerging technique for constraining cosmology and galaxy formation using multi-frequency, low angular resolution maps. Many LIM applications crucially rely on cross-correlations of two line intensity maps, or of intensity maps with galaxy surveys or galaxy/CMB lensing. We present a consistent halo model to predict all these cross-correlations and enable joint analyses, in 3D redshift-space and for 2D projected maps. We extend the conditional luminosity function formalism to the multi-line case, to consistently account for correlated scatter between multiple galaxy line luminosities. This allows us to model the scale-dependent decorrelation between two line intensity maps, a key input for foreground rejection and for approaches that estimate auto-spectra from cross-spectra. This also enables LIM cross-correlations to reveal astrophysical properties of the interstellar medium inacessible with LIM auto-spectra. We expose the different sources of luminosity scatter or "line noise" in LIM, and clarify their effects on the 1-halo and galaxy shot noise terms. In particular, we show that the effective number density of halos can in some cases exceed that of galaxies, counterintuitively. Using observational and simulation input, we implement this halo model for the H$α$, [Oiii], Lyman-$α$, CO and [Cii] lines. We encourage observers and simulators to measure galaxy luminosity correlation coefficients for pairs of lines whenever possible. Our code is publicly available at https://github.com/EmmanuelSchaan/HaloGen/tree/LIM . In a companion paper, we use this halo model formalism and code to highlight the degeneracies between cosmology and astrophysics in LIM, and to compare the LIM observables to galaxy detection for a number of surveys.
description: Accepted in JCAP on 05/03/2021. Code publicly available at https://github.com/EmmanuelSchaan/HaloGen/tree/LIM
The Energy-dependent X-ray Timing Characteristics of the Narrow Line Seyfert 1 Mkn 766
Creators: name: Markowitz, A.
name: Papadakis, I. E.
name: Arevalo, P.
name: Turner, T. J.
name: Miller, L.
name: Reeves, J. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the energy-dependent power spectral density (PSD) and cross-spectral properties of Mkn 766, obtained from combining data obtained during an XMM-Newton observation spanning six revolutions in 2005 with data obtained from an XMM-Newton long-look in 2001. The PSD shapes and rms-flux relations are found to be consistent between the 2001 and 2005 observations, suggesting the 2005 observation is simply a low-flux extension of the 2001 observation and permitting us to combine the two data sets. The resulting PSD has the highest temporal frequency resolution for any AGN PSD measured to date. Applying a broken power-law model yields break frequencies which increase in temporal frequency with photon energy. Obtaining a good fit when assuming energy-independent break frequencies requires the presence of a Lorentzian at 4.6+/-0.4 * 10^-4 Hz whose strength increases with photon energy, a behavior seen in black hole X-ray binaries. The cross-spectral properties are measured; temporal frequency-dependent soft-to-hard time lags are detected in this object for the first time. Cross-spectral results are consistent with those for other accreting black hole systems. The results are discussed in the context of several variability models, including those based on inwardly-propagating viscosity variations in the accretion disk.
description: Accepted for publication in The Astrophysical Journal. 18 pages, 9 figures. Uses emulateapj5.sty
Astrophysics & Cosmology from Line Intensity Mapping vs Galaxy Surveys
Creators: name: Schaan, Emmanuel
name: White, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Line intensity mapping (LIM) proposes to efficiently observe distant faint galaxies and map the matter density field at high redshift. Building upon the formalism in the companion paper, we first highlight the degeneracies between cosmology and astrophysics in LIM. We discuss what can be constrained from measurements of the mean intensity and redshift-space power spectra. With a sufficient spectral resolution, the large-scale redshift-space distortions of the 2-halo term can be measured, helping to break the degeneracy between bias and mean intensity. With a higher spectral resolution, measuring the small-scale redshift-space distortions disentangles the 1-halo and shot noise terms. Cross-correlations with external galaxy catalogs or lensing surveys further break degeneracies. We derive requirements for experiments similar to SPHEREx, HETDEX, CDIM, COMAP and CONCERTO. We then revisit the question of the optimality of the LIM observables, compared to galaxy detection, for astrophysics and cosmology. We use a matched filter to compute the luminosity detection threshold for individual sources. We show that LIM contains information about galaxies too faint to detect, in the high-noise or high-confusion regimes. We quantify the sparsity and clustering bias of the detected sources and compare them to LIM, showing in which cases LIM is a better tracer of the matter density. We extend previous work by answering these questions as a function of Fourier scale, including for the first time the effect of cosmic variance, pixel-to-pixel correlations, luminosity-dependent clustering bias and redshift-space distortions.
description: Accepted in JCAP on 05/03/2021. Code publicly available at https://github.com/EmmanuelSchaan/HaloGen/tree/LIM
Phase Transition in Liquid Drop Fragmentation
Creators: name: Moukarzel, Cristian F.
name: Fernandez-Sabido, Silvia F.
name: Ruiz-Suarez, J. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A liquid droplet is fragmented by a sudden pressurized-gas blow, and the resulting droplets, adhered to the window of a flatbed scanner, are counted and sized by computerized means. The use of a scanner plus image recognition software enables us to automatically count and size up to tens of thousands of tiny droplets with a smallest detectable volume of approximately 0.02 nl. Upon varying the gas pressure, a critical value is found where the size-distribution becomes a pure power-law, a fact that is indicative of a phase transition. Away from this transition, the resulting size distributions are well described by Fisher's model at coexistence. It is found that the sign of the surface correction term changes sign, and the apparent power-law exponent tau has a steep minimum, at criticality, as previously reported in Nuclear Multifragmentation studies [1,2]. We argue that the observed transition is not percolative, and introduce the concept of dominance in order to characterize it. The dominance probability is found to go to zero sharply at the transition. Simple arguments suggest that the correlation length exponent is nu=1/2. The sizes of the largest and average fragments, on the other hand, do not go to zero but behave in a way that appears to be consistent with recent predictions of Ashurst and Holian [3,4].
description: 10 pages, 11 figures. LaTeX (revtex4) with psfig/epsfig
The feeding ecology of larval and pelagic juvenile redfish (Sebastes SPP.) on Flemish Cap (47 N, 45 W)
Creators: name: Anderson, John T.
Publisher: name: University of British Columbia
Year: 2008

description: The copepod Calanus finmarchicus dominated the biomass of all invertebrate zooplankton species sampled on Flemish Cap during 1977-1983 as sampled by both coarse (0.333 mm and 0.505 mm) and fine (0.165 mm) mesh samples. Oithona similis and Oithoma atlamtica were numerically dominant in fine mesh samples. Significant differences were observed in the rate of C. fimmarchicus development and absolute abundance among the years sampled on Flemish Cap. Copepod eggs and nauplii were preferred prey of redfish larvae whereas Oithona spp. copepodites were not selected by larvae. The preferred prey of juveniles included Oithona copepodites, in addition to eggs and nauplii. This shift at metamorphosis -was a function of changing prey availability associated with the seasonal succession of zooplankton. Significant differences in diet between 1979 and 1980 compared to 1981 resulted from differences in prey availability which appeared to be due to differences in the seasonal development of C. finmarchicus. When copepod development started earlier and was faster, the diet of redfish was predominantly Oithona spp. Under those conditions, the redfish had lower amounts of food per stomach, lower relative condition and delayed age of metamorphosis at larger sizes. Higher feeding and growth rates occurred in 1980 in association with lower water temperatures and prey concentrations, compared to 1981. Differences in feeding and growth rates between years were related to a shift in available prey, where development of C. finmarchicus occurred earlier in 1981 and the zooplankton were dominated in May by Oithona spp. nauplii and copepodites. It appears that an earlier occurrence and subsequent decline in the abundance of C. finmarchicus eggs and nauplii was detrimental to the feeding and growth of redfish larvae in 1981. Higher growth and survival rates occurred in 1980 compared to 1981. Similar mean lengths of the population measured in August (Day 215) in 1980 and 1981, compared to different growth rates measured each year, indicates that only larger redfish survived in 1981. It is concluded that variations in physical circulation during this study, 1979—81, would not explain differences in annual variations of abundances. Comparison of relative redfish abundances at different ages demonstrated recruitment at age 5 was determined during the larval stage for the years 1979-81.
Phonon Hall viscosity from phonon-spinon interactions
Creators: name: Zhang, Yunchao
name: Teng, Yanting
name: Samajdar, Rhine
name: Sachdev, Subir
name: Scheurer, Mathias S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by experimental observations, Samajdar et al. [Nature Physics 15, 1290 (2019)] have proposed that the insulating Neel state in the parent compounds of the cuprates is proximate to a quantum phase transition to a state in which Neel order coexists with semion topological order. We study the manner in which proximity to this transition can make the phonons chiral, by inducing a significant phonon Hall viscosity. We describe the spinon-phonon coupling in a lattice spinon model coupled to a strain field, and also using a general continuum theory constrained only by symmetry. We find a nonanalytic Hall viscosity across the transition, with a divergent second derivative at zero temperature.
description: 21 pages, 7 figures
General thoughts to the Kaon pair production in the threshold region
Creators: name: Oelert, W.
name: Adam, H. -H.
name: Budzanowski, A.
name: Czerwinski, E.
name: Czyzykiewicz, R.
name: Gil, D.
name: Grzonka, D.
name: Janusz, M.
name: Jarczyk, L.
name: Kamys, B.
name: Khoukaz, A.
name: Klaja, P.
name: Moskal, P.
name: Piskor-Ignatowicz, C.
name: Przerwa, J.
name: Rozek, T.
name: Santo, R.
name: Sefzick, T.
name: Siemaszko, M.
name: Smyrski, J.
name: Taschner, A.
name: Winter, P.
name: Wolke, M.
name: Wustner, P.
name: Zipper, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Simple--minded thoughts about the cross sections for the reactions pp-->ppK+K- and pp-->ppK0K0 are presented, which certainly do not account for the complex coupled channel problem but rather provide some ideas into the mutual reaction dynamics.
description: Talk given at 9th International Workshop on Meson Production, Properties and Interaction, Cracow, Poland, 9-13 June 2006. 3 pages, 2 figures
TAFSIR ILMI BORASIDA YOZILGAN ASARLAR
Creators: name: Oxunjanov, Abdulhay
Publisher: name: Zenodo
Year: 2024

description: Rasululloh sollallohu alayhi vasallam davrlari tafsir uslubi muayyan oyatga u zot sollallohu alayhi vasallamning aytgan ma’nolari va sahoblarning Rasululloh sollallohu alayhi vasallamning so’zlarini eslab qolib, boshqa tobe’in va sahobalarga rivoyat qilishlari bilan bo’lgan. Hijratning birinchi va ikkinchi asrlarida oyatlarning tafsirlari rivoyatlar asosida og’izdan-og’izga o’tib kelgan. Shu asosda muhaddislar o’zlarini hadis to’plamlari kitoblariga turli mavzudagi hadislarni to’plash asnosida alohida “Tafsir kitobi” sarlavhasi ostida Nabiy sollallohu alayhi vasallam va sahoblardan qilingan rivoyatlarni jamlashgan.
Effects of government programmes on sustainable agriculture in the Peace River region of British Columbia : a linear programming analysis
Creators: name: Addo, Majid Kwabena
Publisher: name: University of British Columbia
Year: 2008

description: Land is an essential resource for most types of agricultural production. Its continued productivity forms a significant part of the deliberations about sustainable agriculture. While discussing sustainable agriculture, this thesis focuses on government agricultural programmes that have influenced agricultural land use in the Peace River region of British Columbia. The general aim is to point out the relevant programmes that impede sustainability of agriculture. We assume that farmers are continually making decisions about the optimal allocation of land so as to maximise present value of net farm incomes. A linear programme (LP) is one of the techniques of mathematical programming that can be used to maximise farm incomes. It is this technique that we employed to analyze effects of government agricultural programmes on land use as it pertains to crop and forage production in the Peace River region, where for ages are assumed to be a derived demand for livestock production.Cultivation practices of summerfallow and continuous cropping are examined. Parametric linear programming (PLP) is subsequently used to analyze other optimal land use scenarios by varying the LP's objective function coefficients. As well, other cases including the elimination or halving of government subsidies are also simulated and discussed. Furthermore, an attempt was made to simulate two other scenarios that deal with the removal of grains and summerfallow from lower quality land. The region's soilerosion problem was also simulated. It was found, among other things, that four government agricultural programmes--Western Grain Stabilization Act, Special Canadian Grain Programme, Crop Insurance and Chemical Rebates--encouraged cultivation of marginal lands, which are more susceptible to erosion. For example, some 26% (comprising wheat and summerfallow) of the total farm acreage occurred on classes 4and 5 land. Consequently, these programmes, as presently constituted, adversely impact on Peace River region's sustainable agriculture. Cultivation of grains on only good quality lands resulted in a significant reduction of summerfallow and more intensive cropping, which will lead to less soil degradation in the region. This alternative programme also was observed to increase a farmer's income by about 4%, which can add a total of over $259,000 to the region's economy. As well, it can increase pasture to feed more than 15,600 beef cows, which will be a boon to the livestock industry in the region.
The evolution of the bi-modal colour distribution of galaxies in SDSS groups
Creators: name: Martinez, Hector J.
name: O'Mill, Ana L.
name: Lambas, Diego G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyse $u-r$ colour distributions for several samples of galaxies in groups drawn from the Fourth Data Release of the Sloan Digital Sky Survey. For all luminosity ranges and environments considered the colour distributions are well described by the sum of two Gaussian functions. We find that the fraction of galaxies in the red sequence is an increasing function of group virial mass. We also study the evolution of the galaxy colour distributions at low redshift, $z\le0.18$ in the field and in groups for galaxies brighter than $M_r-5\log(h)=-20$, finding significant evidence of recent evolution in the population of galaxies in groups. The fraction of red galaxies monotonically increases with decreasing redshift, this effect implies a much stronger evolution of galaxies in groups than in the field.
description: 7 pages, 6 figures, submited to MNRAS after minor revision
CME Magnetic Structure and IMF Preconditioning Affecting SEP Transport
Creators: name: Palmerio, Erika
name: Kilpua, Emilia K. J.
name: Witasse, Olivier
name: Barnes, David
name: Sánchez-Cano, Beatriz
name: Weiss, Andreas J.
name: Nieves-Chinchilla, Teresa
name: Möstl, Christian
name: Jian, Lan K.
name: Mierla, Marilena
name: Zhukov, Andrei N.
name: Guo, Jingnan
name: Rodriguez, Luciano
name: Lowrance, Patrick J.
name: Isavnin, Alexey
name: Turc, Lucile
name: Futaana, Yoshifumi
name: Holmström, Mats
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Coronal mass ejections (CMEs) and solar energetic particles (SEPs) are two phenomena that can cause severe space weather effects throughout the heliosphere. The evolution of CMEs, especially in terms of their magnetic structure, and the configuration of the interplanetary magnetic field (IMF) that influences the transport of SEPs are currently areas of active research. These two aspects are not necessarily independent of each other, especially during solar maximum when multiple eruptive events can occur close in time. Accordingly, we present the analysis of a CME that erupted on 2012 May 11 (SOL2012-05-11) and an SEP event following an eruption that took place on 2012 May 17 (SOL2012-05-17). After observing the May 11 CME using remote-sensing data from three viewpoints, we evaluate its propagation through interplanetary space using several models. Then, we analyse in-situ measurements from five predicted impact locations (Venus, Earth, the Spitzer Space Telescope, the Mars Science Laboratory en route to Mars, and Mars) in order to search for CME signatures. We find that all in-situ locations detect signatures of an SEP event, which we trace back to the May 17 eruption. These findings suggest that the May 11 CME provided a direct magnetic connectivity for the efficient transport of SEPs. We discuss the space weather implications of CME evolution, regarding in particular its magnetic structure, and CME-driven IMF preconditioning that facilitates SEP transport. Finally, this work remarks the importance of using data from multiple spacecraft, even those that do not include space weather research as their primary objective.
description: 50 pages, 14 figures, 2 tables, accepted for publication in Space Weather
Three-body interactions with cold polar molecules
Creators: name: Büchler, H. P.
name: Micheli, A.
name: Zoller, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that polar molecules driven by microwave fields give naturally rise to strong three-body interactions, while the two-particle interaction can be independently controlled and even switched off. The derivation of these effective interaction potentials is based on a microscopic understanding of the underlying molecular physics, and follows from a well controlled and systematic expansion into many-body interaction terms. For molecules trapped in an optical lattice, we show that these interaction potentials give rise to Hubbard models with strong nearest-neighbor two-body and three-body interaction. As an illustration, we study the one-dimensional Bose-Hubbard model with dominant three-body interaction and derive its phase diagram.
description: 8 pages, 4 figures
Higgs Triplets and Limits from Precision Measurements
Creators: name: Chen, Mu-Chun
name: Dawson, Sally
name: Krupovnickas, Tadas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this letter, we present our results on a global fit to precision electroweak data in a Higgs triplet model. In models with a triplet Higgs boson, a consistent renormalization scheme differs from that of the Standard Model and the global fit shows that a light Higgs boson with mass of 100-200 GeV is preferred. Triplet Higgs bosons arise in many extensions of the Standard Model, including the left-right model and the Little Higgs models. Our result demonstrates the importance of the scalar loops when there is a large mass splitting between the heavy scalars. It also indicates the significance of the global fit.
description: 7 pages, 8 figures; v2: version to be published in Phys. Rev. D
Diffusion or bounce back in relativistic heavy-ion collisions?
Creators: name: Wolschin, Georg
name: Biyajima, Minoru
name: Mizoguchi, Takuya
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The time evolution of pseudorapidity distributions of produced charged hadrons in d+Au collisions at sqrt(s_NN) = 200 GeV is investigated. Results of a nonequilibrium-statistical Relativistic Diffusion Model with three sources are compared with a macroscopic "bounce back" model that does not allow for statistical equilibration at large times, but instead leads to motion reversal. When compared to the data, the results of the diffusion approach are more precise, thus emphasizing that the system is observed to be on its way to thermal equilibrium.
description: 8 pages, 2 figures
Mode-wise Tensor Decompositions: Multi-dimensional Generalizations of CUR Decompositions
Creators: name: Cai, HanQin
name: Hamm, Keaton
name: Huang, Longxiu
name: Needell, Deanna
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Low rank tensor approximation is a fundamental tool in modern machine learning and data science. In this paper, we study the characterization, perturbation analysis, and an efficient sampling strategy for two primary tensor CUR approximations, namely Chidori and Fiber CUR. We characterize exact tensor CUR decompositions for low multilinear rank tensors. We also present theoretical error bounds of the tensor CUR approximations when (adversarial or Gaussian) noise appears. Moreover, we show that low cost uniform sampling is sufficient for tensor CUR approximations if the tensor has an incoherent structure. Empirical performance evaluations, with both synthetic and real-world datasets, establish the speed advantage of the tensor CUR approximations over other state-of-the-art low multilinear rank tensor approximations.
The MUSE Extremely Deep Field: the Cosmic Web in Emission at High Redshift
Creators: name: Bacon, Roland
name: Mary, David
name: Garel, Thibault
name: Blaizot, Jeremy
name: Maseda, Michael
name: Schaye, Joop
name: Wisotzki, Lutz
name: Conseil, Simon
name: Brinchmann, Jarle
name: Leclercq, Floriane
name: Abril-Melgarejo, Valentina
name: Boogaard, Leindert
name: Bouché, Nicolas
name: Contini, Thierry
name: Feltre, Anna
name: Guiderdoni, Bruno
name: Herenz, Christian
name: Kollatschny, Wolfram
name: Kusakabe, Haruka
name: Matthee, Jorryt
name: Michel-Dansac, Léo
name: Nanayakkara, Themiya
name: Richard, Johan
name: Roth, Martin
name: Schmidt, Kasper B.
name: Steinmetz, Matthias
name: Tresse, Laurence
name: Urrutia, Tanya
name: Verhamme, Anne
name: Weilbacher, Peter M.
name: Zabl, Johannes
name: Zoutendijk, Sebastiaan L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the discovery of diffuse extended Ly-alpha emission from redshift 3.1 to 4.5, tracing cosmic web filaments on scales of 2.5-4 comoving Mpc. These structures have been observed in overdensities of Ly-alpha emitters in the MUSE Extremely Deep Field, a 140 hour deep MUSE observation located in the Hubble Ultra Deep Field. Among the 22 overdense regions identified, 5 are likely to harbor very extended Ly-alpha emission at high significance with an average surface brightness of $\mathrm{5 \times 10^{-20} erg s^{-1} cm^{-2} arcsec^{-2}}$. Remarkably, 70% of the total Ly-alpha luminosity from these filaments comes from beyond the circumgalactic medium of any identified Ly-alpha emitters. Fluorescent Ly-alpha emission powered by the cosmic UV background can only account for less than 34% of this emission at z$\approx$3 and for not more than 10% at higher redshift. We find that the bulk of this diffuse emission can be reproduced by the unresolved Ly-alpha emission of a large population of ultra low luminosity Ly-alpha emitters ($\mathrm{<10^{40} erg s^{-1}}$), provided that the faint end of the Ly-alpha luminosity function is steep ($α\lessapprox -1.8$), it extends down to luminosities lower than $\mathrm{10^{38} - 10^{37} erg s^{-1}}$ and the clustering of these Ly-alpha emitters is significant (filling factor $< 1/6$). If these Ly-alpha emitters are powered by star formation, then this implies their luminosity function needs to extend down to star formation rates $\mathrm{< 10^{-4} M_\odot yr^{-1}}$. These observations provide the first detection of the cosmic web in Ly-alpha emission in typical filamentary environments and the first observational clue for the existence of a large population of ultra low luminosity Ly-alpha emitters at high redshift.
description: 28 pages, 19 figures
Ελληνικές Ευρωεκλογές 2014: Το Πολιτικό Μάρκετινγκ των Πολιτικών Κομμάτων και Σχηματισμών
Creators: name: Λιάκου, Ευγενία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ελληνικές Ευρωεκλογές 2014
Πολιτικό Μάρκετινγκ
Προεκλογική Εκστρατεία
Greek European elections 2014
Political Marketing
Electoral Campaign

description: Η παρούσα μελέτη αποτελεί μια προσπάθεια χαρτογράφησης και αποτύπωσης των μεθόδων και των εργαλείων πολιτικού μάρκετινγκ που χρησιμοποίησαν τα κόμματα και οι πολιτικοί σχηματισμοί που εξέλεξαν ευρωβουλευτές στις ελληνικές Ευρωεκλογές του 2014. Η έρευνα καταδεικνύει την προσπάθεια των κομμάτων να επικοινωνήσουν με τους ψηφοφόρους, έτσι ώστε να μεταφέρουν τα επιλεγμένα πολιτικά μηνύματα που σχεδιάστηκαν σύμφωνα με τις στρατηγικές που είχαν χαράξει επιδιώκοντας να αποκομίσουν το μεγαλύτερο δυνατό όφελος που θα αποτυπώνονταν στα εκλογικά αποτελέσματα. Σε μια δύσκολη πολιτική αρένα που διαμορφώθηκε κατά τη διάρκεια της οικονομικής κρίσης και μετά τις συνέπειες από την επιβολή των μνημονίων ο εκλογικός ανταγωνισμός διεξήχθη κατά βάσει με εθνικά διακυβεύματα. Κάποια από τα κόμματα αξιοποίησαν μεθόδους και εργαλεία πολιτικού μάρκετινγκ για την προώθηση της προεκλογικής τους εκστρατείας ενώ κάποια άλλα είτε επέλεξαν είτε εξαναγκάστηκαν να στηριχθούν στην πολιτική και οργανωτική εμπειρία του παρελθόντος. Η έρευνα αποτυπώνει επίσης την ανάπτυξη της χρήσης του διαδικτύου και των social media από τα κόμματα έναντι των παραδοσιακών μέσων προβολής και επικοινωνίας
description: This study constitutes an attempt to map and capture the political marketing methods and tools that used by the parties and political groups that elected members of the European Parliament at the 2014 European Parliament election in Greece. This research indicates the effort of the parties to communicate with the voters, so that they impart the selected political messages designed in accordance with the strategies they had set out, seeking to derive the highest possible benefit that would be reflected at the election results. The electoral competition carried out with national issues, in a difficult political arena which had been formulated during the economic crisis and following the consequences of imposing the memorandums. Some of the parties used political marketing methods and tools to promote their electoral campaigns, while others either chose or were forced to rely on political and organizational past experience. This research also reflects the growth of the internet and social media use by the parties, in comparison to the traditional coverage and communication media
Uniqueness of de Sitter space
Creators: name: Galloway, Gregory J.
name: Solis, Didier A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: All inextendible null geodesics in four dimensional de Sitter space dS^4 are complete and globally achronal. This achronality is related to the fact that all observer horizons in dS^4 are eternal, i.e. extend from future infinity scri^+ all the way back to past infinity scri^-. We show that the property of having a null line (inextendible achronal null geodesic) that extends from scri^- to scri^+ characterizes dS^4 among all globally hyperbolic and asymptotically de Sitter spacetimes satisfying the vacuum Einstein equations with positive cosmological constant. This result is then further extended to allow for a class of matter models that includes perfect fluids.
description: 22 pages, 2 figures