cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Forbidden Landscape from Holography
Creators: name: Nakayama, Yu
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a class of field configurations that are forbidden in the quantum gravity because of inconsistency in the dual field theory from holography. Scale invariant but non-conformal field theories are impossible in (1+1) dimension, and so should be the corresponding gravity dual. In particular, the "spontaneous Lorentz symmetry breaking" models and the "ghost condensation" models, which are well-studied in phenomenology literatures, are forbidden in any consistent quantum theories of gravity in (1+2) dimension since they predict such inconsistent field configurations.
description: 4pages, v2: some improvements, reference added
Fermion localization on asymmetric two-field thick branes
Creators: name: Zhao, Zhen-Hua
name: Liu, Yu-Xiao
name: Li, Hai-Tao
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we investigate the localization of fermions on asymmetric thick branes generated by two scalars $ϕ$ and $χ$. In order to trap fermions on the asymmetric branes with kink-like warp factors, the couplings with the background scalars $η\barΨF(χ,ϕ)Ψ$ are introduced, where $F(χ,ϕ)$ is a function of $ϕ$ and $χ$. We find that the coupling $η\barΨχϕΨ$ do not support the localization of 4-dimensional fermions on the branes. While, for the case $η\barΨχΨ+η'\barΨϕΨ$, which is the kink-fermion coupling corresponding to one-scalar-generated brane scenarios, the zero mode of left-handed fermions could be trapped on the branes under some conditions.
description: v2: 11 pages, 4 figures, accepted by CQG
Identification of key environmental drivers influencing macroalgal communities in high Arctic fjords
Creators: name: Beck, Milan
Publisher: name: Zenodo
Year: 2022
Subjects: Svalbard, littoral, glacial, macroalgae, kelp

description: In the inner part of Billefjord, Svalbard, UNIS has three littoral sampling stations, included one close to the glacier front, one with freshwater input without glacier, and one with little input from glacier and freshwater, more affected by Atlantic water. The three stations were measures throughout the summer 2021, mainly for spatial differences, using an autonomous surface vehicle (USV), enabling safe remote control and sampling. The sampling regime included e.g. CTD, turbidity, PAR measurements and split beam echosounder. The observational data were validated with remote drop cameras and baited video rigs. Billefjord had large spatial differences in physical-chemical traits due to the inputs from glaciers and freshwater, including the effects on the formation of seasonal sea ice, making the site suitable as a model system for abiotic drivers during climate changes. The establishment of macroalgae will be one of the drivers for changes in benthic and fish communities. The study showed that the macroalgae established relatively early after retreat of the glaciers, and that increased turbidity close to glaciers had relatively little effect on the establishment.The study showed large spatial differences in plant coverage of kelp, with the lowest distribution of macroalgae in the habitat affected by freshwater input. The kelp communities had a depth distribution down to 30 m, and while the Atlantic water station showed a decreased with depth, the freshwater and glacier station increased with depth. Master thesis at The University Centre in Svalbard (supervisor Børge Damsgård), and University of Bremen (supervisor Kai Bischof)
Correlations between vibrational entropy and dynamics in super-cooled liquids
Creators: name: Wyart, Matthieu
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A relation between vibrational entropy and particles mean square displacement is derived in super-cooled liquids, assuming that the main effect of temperature changes is to rescale the vibrational spectrum. Deviations from this relation, in particular due to the presence of a Boson Peak whose shape and frequency changes with temperature, are estimated. Using observations of the short-time dynamics in liquids of various fragility, it is argued that (i) if the crystal entropy is significantly smaller than the liquid entropy at $T_g$, the extrapolation of the vibrational entropy leads to the correlation $T_K\approx T_0$, where $T_K$ is the Kauzmann temperature and $T_0$ is the temperature extracted from the Vogel-Fulcher fit of the viscosity. (ii) The jump in specific heat associated with vibrational entropy is very small for strong liquids, and increases with fragility. The analysis suggests that these correlations stem from the stiffening of the Boson Peak under cooling, underlying the importance of this phenomenon on the dynamical arrest.
description: Eqs.2 and 7 corrected, results unchanged
A constraint-based approach for identifying the urban–rural fringe of polycentric cities using multi-sourced data
Creators: name: Yang, Jing
name: Dong, Jingwen
name: Sun, Yizhong
name: Zhu, Jie
name: Huang, Yi
name: Yang, Sheng
Publisher: name: Taylor & Francis
Year: 2021
Subjects: Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Mathematical Sciences not elsewhere classified
Cancer
Science Policy

description: Studies on urban–rural fringes, which represent regions facing various urbanization problems caused by rapid expansion, have steadily increased in recent years. However, problems persist in the quantitative delimitation of such regions. Based on the characteristics of abrupt urbanization-level changes in urban–rural fringe areas, we propose a constraint-based method in this study to detect the urban–rural fringes of cities with a spatial polycentric structure of ‘Main center–Subcenter’ based on data from multiple sources. We used the proposed approach to delimitate the fringe areas of Jiangyin and Zhangjiagang and identify their urban main center and subcenter pre-defined by their city master plans, towns, and rural hinterlands. Comparison of the identified results of different single urbanization indices, a single detection center, kernel density estimation, and a single constraint revealed that the patch density and Shannon’s diversity index of the proposed method were higher in urban–rural fringes and smaller in city centers and rural hinterlands. This suggests that the landscape of urban–rural fringes delimitated by the proposed method is more fragmented, diverse, and complicated, thereby performing better. This study is significant for future urban spatial analysis, planning, and management.
Vacuum Ultraviolet Time-Resolved Photoelectron Spectroscopy Using Velocity Map Imaging
Creators: name: Hemsworth, Michael
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: Velocity map imaging
Photoelectron spectroscopy
Tunable vacuum ultraviolet source
Molecular dynamics
Carbonyl sulfide
OCS
VMI
3D VMI
PEPICO

description: This thesis covers two separate but related projects. The first project covers the design and simulation of a new angle-resolved photoelectron-photoion coincidence (PEPICO) spectrometer. The spectrometer utilizes velocity map imaging (VMI) to measure the photoelectron kinetic energy and angular distributions in coincidence or covariance with the photoion mass spectrum using a Wiley-McLaren time-of-flight mass spectrometer. The instrument was also designed for 3D VMI, a technique that measures the full three dimensional photoelectron velocity distribution. Simulations were performed to measure the spectrometer performance with respect to photoelectron kinetic energy resolution, mass resolution and photoelectron time spread resolution, the latter being important for 3D VMI. The second project covers a time-resolved velocity map imaging photoelectron spectroscopy study of nonadiabatic excited state dynamics in carbonyl sulfide (OCS). An ultrafast tunable vacuum ultraviolet light source was tuned to two different vibrational states of the singlet sigma plus excited state. A direct measurement of the excited state lifetimes was made. The photoelectron kinetic energy and angular distributions were used to determine three different ionization mechanisms: we found evidence for direct ionization, superexcited OCS* molecular autoionization and superexcited photofragment S* autoionization. In the future, definitive evidence of our assignments could be made with a coincidence measurement, thus the results from this experiment will be used as a benchmark for the new spectrometer described above.
Recent $ν$s from IceCube
Creators: name: Klein, Spencer R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: IceCube is a 1 km$^3$ neutrino detector now being built at the South Pole. Its 4800 optical modules will detect Cherenkov radiation from charged particles produced in neutrino interactions. IceCube will search for neutrinos of astrophysical origin, with energies from 100 GeV up to $10^{19}$ eV. It will be able to separate $ν_e$, $ν_μ$ and $ν_τ$. In addition to detecting astrophysical neutrinos, IceCube will also search for neutrinos from WIMP annihilation in the Sun and the Earth, look for low-energy (10 MeV) neutrinos from supernovae, and search for a host of exotic signatures. With the associated IceTop surface air shower array, it will study cosmic-ray air showers. IceCube construction is now 50% complete. After presenting preliminary results from the partial detector, I will discuss IceCube's future plans.
description: Invited talk presented at Neutrino 2008; 7 pages
Controlling intrinsic-shear alignment in three-point weak lensing statistics
Creators: name: Shi, X.
name: Joachimi, B.
name: Schneider, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Three-point weak lensing statistics provide cosmic information complementary to that of two-point statistics. However, both statistics suffer from intrinsic-shear alignment, which is one of their limiting systematics. The nulling technique is a model-independent method developed to eliminate intrinsic-shear alignment at the two-point level. In this paper we demonstrate that the nulling technique can also be naturally generalized to the three-point level, controlling the corresponding GGI systematics. We show that under the assumption of exact redshift information the intrinsic-shear alignment contamination can be completely eliminated. To show how well the nulling technique performs on data with limited redshift information, we apply the nulling technique to three-point weak lensing statistics from a fictitious survey analogous to a typical future deep imaging survey, in which the three-point intrinsic-shear alignment systematics is generated from a power-law toy model. Using 10 redshift bins, the nulling technique leads to a factor of 10 suppression of the GGI/GGG ratio, and reduces the bias on cosmological parameters to less than the original statistical error. More detailed redshift information allowing for finer redshift bins leads to better reduction of bias. The information loss during the nulling procedure doubles the statistical error on cosmological parameters. A comparison of the nulling technique with an unconditioned compression of the data suggests that part of the information loss can be retained by considering higher-order nulling weights during the nulling procedure. A combined analysis of two- and three-point statistics confirms that the information contained in them is of comparable size and is complementary to each other, both before and after nulling.
description: 15 pages, 9 figures; minor changes made, two figures added. Matches the published version
Tableau-based decision procedure for full coalitional multiagent temporal-epistemic logic of linear time
Creators: name: Goranko, Valentin
name: Shkatov, Dmitry
Publisher: name: arXiv
Year: 2009
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences
subject: F.4.1; I.2.4; I.2.11
subject: F.4.1, I.2.4, I.2.11

description: We develop a tableau-based decision procedure for the full coalitional multiagent temporal-epistemic logic of linear time CMATEL(CD+LT). It extends LTL with operators of common and distributed knowledge for all coalitions of agents. The tableau procedure runs in exponential time, matching the lower bound obtained by Halpern and Vardi for a fragment of our logic, thus providing a complexity-optimal decision procedure for CMATEL(CD+LT).
description: Proceedings of 8th International Conference on Autonomous Agents and Multiagent Systems (AAMAS 09)
The Nekobune Difference Conjecture: A New Perspective on k-Tuple Primes
Creators: name: ねこ, おふ
Publisher: name: Zenodo
Year: 2025

description: [Please forgive me!!!!!!]

I made a fatal mistake in Pattern 2 sum!!!!!!

Donot download until this warning message disappears and is replaced by the correction message!!!

Meow ฅ ˳ ͡ ɷ ˳ ͡ ฅ" (This is for Twitter. If you want the real name version I can give it to you on Twitter (@asphalttaiya).

NOTE (Correction)  In the initial analysis of Pattern 1 ({0,6,8,14,18}), the following errors were identified:  - **Sum of Δp_k**: 88,770 (previously miscalculated as 91,930)  - **Average **: 5,918.0 - **Error rate vs theory**: 5.31% (was 1.94%)  

The conclusions remain qualitatively unchanged, but readers should refer to these corrected values.  A full revised version will follow.
The Nekobune Difference Conjecture: A New Perspective on k-Tuple Primes
Creators: name: ねこ, おふ
Publisher: name: Zenodo
Year: 2025

description: *All mistakes have been fixed

Meow ฅ ˳ ͡ ɷ ˳ ͡ ฅ" (This is for Twitter. If you want the real name version I can give it to you on Twitter (@asphalttaiya).

NOTE (Correction)  In the initial analysis of Pattern 1 ({0,6,8,14,18}), the following errors were identified:  - **Sum of Δp_k**: 88,770 (previously miscalculated as 91,930)  - **Average **: 5,918.0 - **Error rate vs theory**: 5.31% (was 1.94%)  

The conclusions remain qualitatively unchanged, but readers should refer to these corrected values.  A full revised version will follow.
Semantic generalization in French-English bilinguals
Creators: name: Lamothe, Pauline Louise Marie
Publisher: name: University of British Columbia
Year: 2011

description: In attempting to illustrate between-language semantic transfer French-English bilinguals were trained under a conditioning paradigm basically analogous to that used in unilingual semantic generalization studies. The major difference lay in the testing phase. That is, testing for conditioned responses (CRs) to the translations of the stimuli replaced testing for CRs to synonyms of the stimuli. Eight two-syllable nouns in both French and English were presented, with half the stimuli in each of the two languages paired with shock. Following the conditioning procedure shock was withheld and the translation of each of the stimuli was presented. Measures of Galvanic Skin Responses (GSRs) and digital and cephalic vasomotor activity were recorded during both training and testing. The results clearly indicated greater occurrence of GSRs to the translation of the words paired with shock than to the translation of the neutral words. There was no significant difference in the occurrence of digital vasomotor activity; however, cephalic readings suggested significant constriction to the translation of the stimuli which had been paired with shock. The occurrence of CRs to the translation of verbal stimuli suggests a form of mediated transfer from one language to another.
title: Saison 1 (2021-2022) - Mondes d'après
Publisher: name: Maison des Sciences de l’Homme de Clermont-Ferrand
Year: 2022

description: La première saison (2021-2022) des podcasts proposés par la MSH de Clermont-Ferrand s’intitule « Mondes d’après ».
Wave propagation in elastic bars coupled by viscoelstic element
Creators: name: Kapoor, Arun Kumar
Publisher: name: University of British Columbia
Year: 2011

description: The split Hopkinson pressure bar has been used to study the acoustic isolation that can be achieved by inserting a compliant element into the sound path in an elastic system, and to study the dynamic response of the material comprising the compliant element. The specimens were inserted between two steel transducer bars. The incident stress pulse, of about 100 microsecond duration, was produced by striking the free end of one of the transducer bars by a round-headed striker bar. The incident pulse in the first bar and the transmitted pulse in the second bar were sensed by strain gages and displayed on an oscilloscope. The comparison of computed Fourier transforms (within the acoustic frequency range) of both the incident and transmitted pulses showed that in general a greater reduction in transmission of vibration across a specimen is achieved: i) by increasing the length of the specimen; ii) by using a material with a higher attenuation constant or higher viscous damping; iii) by increasing the impedance mismatch between the specimen and the steel transducer bars. Also, it was found that isolation is greater at high frequencies than at low frequencies.
Total variation bound for Kac's random walk
Creators: name: Jiang, Yunjiang
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We show that the classical Kac's random walk on $(n-1)$-sphere $S^{n-1}$ starting from the point mass at $e_1$ mixes in $\mathcal{O}(n^5(\log n)^3)$ steps in total variation distance. The main argument uses a truncation of the running density after a burn-in period, followed by $\mathcal{L}^2$ convergence using the spectral gap information derived by other authors. This improves upon a previous bound by Diaconis and Saloff-Coste of order $\mathcal {O}(n^{2n})$.
description: Published in at http://dx.doi.org/10.1214/11-AAP810 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Local resilience and Hamiltonicity Maker-Breaker games in random-regular graphs
Creators: name: Ben-Shimon, Sonny
name: Krivelevich, Michael
name: Sudakov, Benny
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: For an increasing monotone graph property $\mP$ the \emph{local resilience} of a graph $G$ with respect to $\mP$ is the minimal $r$ for which there exists of a subgraph $H\subseteq G$ with all degrees at most $r$ such that the removal of the edges of $H$ from $G$ creates a graph that does not possesses $\mP$. This notion, which was implicitly studied for some ad-hoc properties, was recently treated in a more systematic way in a paper by Sudakov and Vu. Most research conducted with respect to this distance notion focused on the Binomial random graph model $\GNP$ and some families of pseudo-random graphs with respect to several graph properties such as containing a perfect matching and being Hamiltonian, to name a few. In this paper we continue to explore the local resilience notion, but turn our attention to random and pseudo-random \emph{regular} graphs of constant degree. We investigate the local resilience of the typical random $d$-regular graph with respect to edge and vertex connectivity, containing a perfect matching, and being Hamiltonian. In particular we prove that for every positive $ε$ and large enough values of $d$ with high probability the local resilience of the random $d$-regular graph, $\GND$, with respect to being Hamiltonian is at least $(1-ε)d/6$. We also prove that for the Binomial random graph model $\GNP$, for every positive $ε>0$ and large enough values of $K$, if $p>\frac{K\ln n}{n}$ then with high probability the local resilience of $\GNP$ with respect to being Hamiltonian is at least $(1-ε)np/6$. Finally, we apply similar techniques to Positional Games and prove that if $d$ is large enough then with high probability a typical random $d$-regular graph $G$ is such that in the unbiased Maker-Breaker game played on the edges of $G$, Maker has a winning strategy to create a Hamilton cycle.
description: 34 pages. 1 figure
Action minimizing properties and distances on the group of Hamiltonian diffeomorphisms
Creators: name: Sorrentino, Alfonso
name: Viterbo, Claude
Publisher: name: arXiv
Year: 2010
Subjects: subject: Symplectic Geometry (math.SG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this article we prove that for a smooth fiberwise convex Hamiltonian, the asymptotic Hofer distance from the identity gives a strict upper bound to the value at 0 of Mather's $β$ function, thus providing a negative answer to a question asked by K. Siburg in \cite{Siburg1998}. However, we show that equality holds if one considers the asymptotic distance defined in \cite{Viterbo1992}.
description: 21pp, accepted for publication in Geometry & Topology
Holography from Conformal Field Theory
Creators: name: Heemskerk, Idse
name: Penedones, Joao
name: Polchinski, Joseph
name: Sully, James
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The locality of bulk physics at distances below the AdS length is one of the remarkable aspects of AdS/CFT duality, and one of the least tested. It requires that the AdS radius be large compared to the Planck length and the string length. In the CFT this implies a large-N expansion and a gap in the spectum of anomalous dimensions. We conjecture that the implication also runs in the other direction, so that any CFT with a planar expansion and a large gap has a local bulk dual. For an abstract CFT we formulate the consistency conditions, most notably crossing symmetry, and show that the conjecture is true in a broad range of CFT's, to first nontrivial order in 1/N^2: any CFT with a gap and a planar expansion is generated via the AdS/CFT dictionary from a local bulk interaction. We establish this result by a counting argument on each side, and also investigate various properties of some explicit solutions.
description: 49 pages. Minor corrections. Figure and references added
Development of a research watershed system and a streamflow prediction model
Creators: name: Kennedy, Gary Franklin
Publisher: name: University of British Columbia
Year: 2011

description: Two independent hydrologic research projects, the development of (1) a research watershed system and (2) a streamflow prediction model, were carried out. The first project was primarily a field instrumentation task involving both design and implementation of a system of research watersheds. Two small (50 acre) research watersheds which may become either representative or experimental in nature were initiated within the University of British Columbia Research Forest. A larger research watershed system was described which could include the Alouette River Watershed. This system of watersheds when subjected to more rigorous experimental procedures should yield valuable, management and conservation design criteria for Pacific Coast forested regions. The second project was primarily analytic in nature, employing the use of multiple regression and a digital computer. A computer program was developed which models the snowmelt streamflow of large watersheds in a manner which makes short term prediction of the streamflow possible. The prediction variables were temperature recorded at a single centrally located station, time and streamflow recorded at the outlet from the watershed. The model predicted flood flow one to five days in advance of measured streamflow for the Fraser River Watershed (78,000 square miles in area) during the spring runoff period of 1955 and 1964. This model required calibration at the beginning of each spring runoff period.
Galaxies probing galaxies: cool halo gas from a z = 0.47 post-starburst galaxy
Creators: name: Rubin, Kate H. R.
name: Prochaska, J. Xavier
name: Koo, David C.
name: Phillips, Andrew C.
name: Weiner, Benjamin J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the cool gas around a galaxy at z = 0.4729 using Keck/LRIS spectroscopy of a bright (B = 21.7) background galaxy at z = 0.6942 at a transverse distance of 16.5/h_70 kpc. The background galaxy spectrum reveals strong FeII, MgII, MgI, and CaII absorption at the redshift of the foreground galaxy, with a MgII 2796 rest equivalent width of 3.93 +/- 0.08 Angstroms, indicative of a velocity width exceeding 400 km/s. Because the background galaxy is large (> 4/h_70 kpc), the high covering fraction of the absorbing gas suggests that it arises in a spatially extended complex of cool clouds with large velocity dispersion. Spectroscopy of the massive (log M_*/M_sun = 11.15 +/- 0.08) host galaxy reveals that it experienced a burst of star formation about 1 Gyr ago and that it harbors a weak AGN. We discuss the possible origins of the cool gas in its halo, including multiphase cooling of hot halo gas, cold inflow, tidal interactions, and galactic winds. We conclude the absorbing gas was most likely ejected or tidally stripped from the interstellar medium of the host galaxy or its progenitors during the past starburst event. Adopting the latter interpretation, these results place one of only a few constraints on the radial extent of cool gas driven or stripped from a galaxy in the distant Universe. Future studies with integral field unit spectroscopy of spatially extended background galaxies will provide multiple sightlines through foreground absorbers and permit analysis of the morphology and kinematics of the gas surrounding galaxies with a diverse set of properties and environments.
description: Submitted to ApJ. 13 pages, 5 figures, Figure 1 reduced in resolution. Uses emulateapj format
Additional file 5: of Genome-wide characterization and phylogenetic analysis of GSK gene family in three species of cotton: evidence for a role of some GSKs in fiber development and responses to stress
Creators: name: Wang, Lingling
name: Yang, Zhaoen
name: Zhang, Bin
name: Yu, Daoqian
name: Liu, Ji
name: Gong, Qian
name: Qanmber, Ghulam
name: Li, Yi
name: Lu, Lili
name: Lin, Yongjun
name: Yang, Zuoren
name: Li, Fuguang
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology

description: Figure S3. Motif logos of 16 conserved motifs found in cotton GSK proteins. (PDF 817 kb)
Multiconfigurational time-dependent Hartree-Fock calculations for photoionization of one-dimensional Helium
Creators: name: Hochstuhl, D.
name: Bauch, S.
name: Bonitz, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The multiconfigurational time-dependent Hartree-Fock equations are discussed and solved for a one-dimensional model of the Helium atom. Results for the ground state energy and two-particle density as well as the absorption spectrum are presented and compared to direct solutions of the time-dependent Schroedinger equation.
description: 10 pages, 3 figures, 1 table
Construction du coeur compact d'un arbre réel par substitution d'arbre
Creators: name: Jullian, Yann
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B10 (Primary), 20E08, 20F65 (Secondary)

description: This article introduces tree substitutions as a tool to give explicit geometric representations of the dynamical systems generated by a particular set of automorphisms of the free group.
description: 38 pages, 19 figures. To appear in 'Annales de l'Institut Fourier'. Typos corrected, references added, and some paragraphs have been extended
The design and synthesis of novel antimalarials
Creators: name: Barrows, Robert Dennis
Publisher: name: No Publisher Supplied
Year: 2020

description: This dissertation describes the progress made in the development of compounds with in vitro potency against the Plasmodium falciparum parasite. Plasmodium is a genus of single-celled parasites that causes malaria after infection of a human host. Three scaffolds will be discussed. Each shows indications of operating through a mechanism of action orthogonal to that of currently available therapeutics.Chapter 1 details the growing need for new antimalarials as new resistant strains of Plasmodium emerge. The features of an ideal antimalarial are also mentioned.Chapter 2 introduces the first scaffold, tetrahydroisoquinolines or (THIQs). This series of compounds was developed by the Knapp group in collaboration with St. Jude Research Hospital and has produced a lead candidate known as SJ733. The synthesis of these compounds involves an amidation at a racemizable carboxylic acid. A stereoselective amidation reaction is described that preferentially produces a higher energy cis product. Evidence of a ketene intermediate is presented in the form of IR evidence and the characterization of ketene dimers.Chapter 3 presents 2-thio thienopyrimidines (TTPs) as a new antimalarial scaffold that has shown efficacy against the parasite. Despite many promising features, these structures contain a diaryl thioether believed to be metabolically labile and the source of poor in vivo stability. A computational study is described that attempts to define an electronic and geometric mimic to a diaryl thioether. A synthetic effort is then presented that aims to create a TTP analogue featuring a thioether isostere.Chapter 4 describes the scaffold manipulation and initial structure-activity relationship (SAR) studies of our final series, the tetrahydrobenzonapthyridines (TBNs). These compounds initially showed promising activity against the Plasmodium parasite in the double-digit nanomolar range. However, these numbers could not be reproduced in subsequent studies. This was initially hypothesized to be due to the poor solubility of the compounds. An effort was then launched to increase the drug-likeness of the series by making strategic alterations to the scaffold. A general divergent synthesis for TBNs is described as well as several unique syntheses for chemically interesting analogues. Over seventy compounds were synthesized, and a preliminary SAR was developed. The TBN pyrrolinone, an oxidized form of the TBN that features a unique aminal substructure, was discovered. This product, formed from exposure to oxygen, shows potency against P. falciparum in the single-digit nanomolar range. The purposeful synthesis of these compounds is detailed as well as their EC50 against the parasite.Chapter 5 details attempts to improve the Mitsunobu reaction by the development of imidazolyl phosphines. These compounds show enhanced solubility over traditional Mitsunobu reagents. Discussion includes attempts to optimize phosphine structure to improve yield, as well as synthetic plans for other phosphines.
Additional file 7: of Genome-wide characterization and phylogenetic analysis of GSK gene family in three species of cotton: evidence for a role of some GSKs in fiber development and responses to stress
Creators: name: Wang, Lingling
name: Yang, Zhaoen
name: Zhang, Bin
name: Yu, Daoqian
name: Liu, Ji
name: Gong, Qian
name: Qanmber, Ghulam
name: Li, Yi
name: Lu, Lili
name: Lin, Yongjun
name: Yang, Zuoren
name: Li, Fuguang
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology

description: Figure S4. Cis-regulatory elements predicted in the promoter regions of cotton GSK genes. (PDF 173 kb)
Palynology of middle and late tertiary sediments from the central interior of British Columbia, Canada
Creators: name: Piel, Kenneth Martin
Publisher: name: University of British Columbia
Year: 2011

description: Sediments of Mid - to Late Tertiary age from the Fraser River and its tributaries near Quesnel and Prince George in central British Columbia have been investigated for plant microfossils. Three rock units have been studied. The Oligocene rock unit consists of interbedded clay, sand, gravel and lignite, and is exposed along the Fraser River at Alexandria Ferry and at the mouth of Narcosli Creek. This unit is dated by titanothere teeth. The probable Miocene rock unit also consists of interbedded clay, silt, sand, gravel and lignite, and is exposed below Moose Heights, near Quesnel. This unit is dated on the basis of pollen and leaves. The Mio-Pliocene rock unit is diatomite and diatomaceous clays, exposed at the Big Bend of the Fraser River, across from Moose Heights, and along the Nechako River. It appears to underlie radiometrically dated rocks. Palynological studies have revealed a sub-tropical to warm temperate Oligocene flora which includes Quercus, Alnus, Carya, Liquidambar, Ulmus, Juglans, Pterocarya, Taxodium, Glyptostrobus, Engelhardtia, Prosopis, Metasequoia, Osmunda, Psilotum, Ephedra and ? Dorstenia. The probable Miocene assemblage contains Juglans, Taxodium, Glyptostrobus, Metasequoia and Alnus, with larger numbers of Liquidambar, Pterocarya, Ulmus, Castanea, Carya and Quercus than in the Oligocene flora. The Mio-Pliocene paleoflora is distinguished by a predominance of cool temperate taxa, e.g. Pinus, Abies, Picea and Cedrus. From pollen evidence a sub-tropical to warm temperate climate is suggested for the Early Oligocene, with the warm, humid climate probably due in large part to the influence of a warm polar sea. The pollen and leaves from the probable Miocene sediments suggest a more temperate climate with less rainfall, due probably to the cooling during the Tertiary. Pollen recovered from the Mio-Pliocene unit indicates a cool temperate climate and establishment of a predominantly coniferous forest. This is the first Oligocene pollen assemblage studied in the Pacific Northwest and the probable Miocene, and Mio-Pliocene assemblages supplement those of other workers in the area. This thesis also provides information on past climatic history of British Columbia and the Pacific Northwest.
Plasmodium falciparum K76T pfcrt gene mutations and parasite population structure, Haiti, 2006–2009
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: CQR
CQS
Haiti
Hispaniola
Jeremie
K76T pfcrt
Les Cayes
Plasmodium falciparum
chloroquine
gene mutation
haplotype
malaria
parasites
vector-borne infections
vectorborne
DNA Barcoding, Taxonomic
Geography
History, 21st Century
Humans
Malaria, Falciparum
Membrane Transport Proteins
Mutation
Phylogeography
Protozoan Proteins
Sequence Analysis, DNA

description: © 2016, Centers for Disease Control and Prevention (CDC). All rights reserved. Hispaniola is the only Caribbean island to which Plasmodium falciparum malaria remains endemic. Resistance to the antimalarial drug chloroquine has rarely been reported in Haiti, which is located on Hispaniola, but the K76T pfcrt (P. falciparum chloroquine resistance transporter) gene mutation that confers chloroquine resistance has been detected intermittently. We analyzed 901 patient samples collected during 2006–2009 and found 2 samples showed possible mixed parasite infections of genetically chloroquine-resistant and -sensitive parasites. Direct sequencing of the pfcrt resistance locus and single-nucleotide polymorphism barcoding did not definitively identify a resistant population, suggesting that sustained propagation of chloroquine-resistant parasites was not occurring in Haiti during the study period. Comparison of parasites from Haiti with those from Colombia, Panama, and Venezuela reveals a geographically distinct population with highly related parasites. Our findings indicate low genetic diversity in the parasite population and low levels of chloroquine resistance in Haiti, raising the possibility that reported cases may be of exogenous origin.
Exact entanglement entropy of the XYZ model and its sine-Gordon limit
Creators: name: Ercolessi, Elisa
name: Evangelisti, Stefano
name: Ravanini, Francesco
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We obtain the exact expression for the Von Neumann entropy for an infinite bipartition of the XYZ model, by connecting its reduced density matrix to the corner transfer matrix of the eight vertex model. Then we consider the anisotropic scaling limit of the XYZ chain that yields the 1+1 dimensional sine-Gordon model. We present the formula for the entanglement entropy of the latter, which has the structure of a dominant logarithmic term plus a constant, in agreement with what is generally expected for a massive quantum field theory.
description: 13 pages, 1 figure - v2: typos corrected - v3: some references and comments of sine-Gordon result added - v4: typos corrected
Juvenile Justice-Translational Research on Interventions for Adolescents in the Legal System (JJ-TRIALS): A cluster randomized trial targeting system-wide improvement in substance use services
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: Adolescent
Cluster randomized trial
Data-driven decision-making
Evidence-based practice implementation
Interagency collaboration
Justice-involved youth
Juvenile justice
Substance use
System change
Treatment services
Cluster Analysis
Criminal Law
Health Plan Implementation
Humans
Juvenile Delinquency
Substance-Related Disorders
Translational Medical Research
United States

description: © 2016 Knight et al. Background: The purpose of this paper is to describe the Juvenile Justice-Translational Research on Interventions for Adolescents in the Legal System (JJ-TRIALS) study, a cooperative implementation science initiative involving the National Institute on Drug Abuse, six research centers, a coordinating center, and Juvenile Justice Partners representing seven US states. While the pooling of resources across centers enables a robust implementation study design involving 36 juvenile justice agencies and their behavioral health partner agencies, co-producing a study protocol that has potential to advance implementation science, meets the needs of all constituencies (funding agency, researchers, partners, study sites), and can be implemented with fidelity across the cooperative can be challenging. This paper describes (a) the study background and rationale, including the juvenile justice context and best practices for substance use disorders, (b) the selection and use of an implementation science framework to guide study design and inform selection of implementation components, and (c) the specific study design elements, including research questions, implementation interventions, measurement, and analytic plan. Methods/design: The JJ-TRIALS primary study uses a head-to-head cluster randomized trial with a phased rollout to evaluate the differential effectiveness of two conditions (Core and Enhanced) in 36 sites located in seven states. A Core strategy for promoting change is compared to an Enhanced strategy that incorporates all core strategies plus active facilitation. Target outcomes include improvements in evidence-based screening, assessment, and linkage to substance use treatment. Discussion: Contributions to implementation science are discussed as well as challenges associated with designing and deploying a complex, collaborative project. Trial registration:NCT02672150.
Steady-state and dynamic gene expression programs in Saccharomyces cerevisiae in response to variation in environmental nitrogen
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: Ammonia
Gene Expression Regulation, Fungal
Gene-Environment Interaction
Nitrogen
RNA, Messenger
Regulon
Saccharomyces cerevisiae
Saccharomyces cerevisiae Proteins
Transcriptome

description: © 2016 Billmann, Horn, et al. Cell growth rate is regulated in response to the abundance and molecular form of essential nutrients. In Saccharomyces cerevisiae (budding yeast), the molecular form of environmental nitrogen is a major determinant of cell growth rate, supporting growth rates that vary at least threefold. Transcriptional control of nitrogen use is mediated in large part by nitrogen catabolite repression (NCR), which results in the repression of specific transcripts in the presence of a preferred nitrogen source that supports a fast growth rate, such as glutamine, that are otherwise expressed in the presence of a nonpreferred nitrogen source, such as proline, which supports a slower growth rate. Differential expression of the NCR regulon and additional nitrogen-responsive genes results in >500 transcripts that are differentially expressed in cells growing in the presence of different nitrogen sources in batch cultures. Here we find that in growth rate-controlled cultures using nitrogen-limited chemostats, gene expression programs are strikingly similar regardless of nitrogen source. NCR expression is derepressed in all nitrogen-limiting chemostat conditions regardless of nitrogen source, and in these conditions, only 34 transcripts exhibit nitrogen source-specific differential gene expression. Addition of either the preferred nitrogen source, glutamine, or the nonpreferred nitrogen source, proline, to cells growing in nitrogen-limited chemostats results in rapid, dose-dependent repression of the NCR regulon. Using a novel means of computational normalization to compare global gene expression programs in steady-state and dynamic conditions, we find evidence that the addition of nitrogen to nitrogen-limited cells results in the transient overproduction of transcripts required for protein translation. Simultaneously, we find that that accelerated mRNA degradation underlies the rapid clearing of a subset of transcripts, which is most pronounced for the highly expressed NCR-regulated permease genes GAP1, MEP2, DAL5, PUT4, and DIP5. Our results reveal novel aspects of nitrogen-regulated gene expression and highlight the need for a quantitative approach to study how the cell coordinates protein translation and nitrogen assimilation to optimize cell growth in different environments.
First measurement of the helicity asymmetry E in η photoproduction on the proton
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: Eta photoproduction
Polarization observable
Helicity asymmetry

description: © 2016 Results are presented for the first measurement of the double-polarization helicity asymmetry E for the η photoproduction reaction γp→ηp. Data were obtained using the FROzen Spin Target (FROST) with the CLAS spectrometer in Hall B at Jefferson Lab, covering a range of center-of-mass energy W from threshold to 2.15 GeV and a large range in center-of-mass polar angle. As an initial application of these data, the results have been incorporated into the Jülich–Bonn model to examine the case for the existence of a narrow N⁎ resonance between 1.66 and 1.70 GeV. The addition of these data to the world database results in marked changes in the predictions for the E observable from that model. Further comparison with several theoretical approaches indicates these data will significantly enhance our understanding of nucleon resonances.
A Spin-Orbital Singlet and Quantum Critical Point on the Diamond Lattice: FeSc2S4
Creators: name: Chen, Gang
name: Balents, Leon
name: Schnyder, Andreas P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a theory of spin and orbital physics in the A-site spinel compound FeSc2S4, which experimentally exhibits a broad "spin-orbital liquid" regime. A spin-orbital Hamiltonian is derived from a combination of microscopic consideration and symmetry analysis. We demonstrate a keen competition between spin-orbit interactions, which favor formation of a local "Spin-Orbital Singlet" (SOS), and exchange, which favors magnetic and orbital ordering. Separating the SOS from the ordered state is a quantum critical point (QCP). We argue that FeSc2S4 is close to this QCP on the SOS side. The full phase diagram of the model includes a commensurate-incommensurate transition within the ordered phase. A variety of comparison to and suggestion for experiments are discussed.
description: 4+ pages, 2 figures, minor corrections
Natural symmetric tensor norms
Creators: name: Carando, Daniel
name: Galicer, Daniel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46M05, 46H05, 47A80

description: In the spirit of the work of Grothendieck, we introduce and study natural symmetric n-fold tensor norms. We prove that there are exactly six natural symmetric tensor norms for $n\ge 3$, a noteworthy difference with the 2-fold case in which there are four. We also describe the polynomial ideals associated to these natural symmetric tensor norms. Using a symmetric version of a result of Carne, we establish which natural symmetric tensor norms preserve Banach algebras.
description: 22 pages
Structured feature selection using coordinate descent optimization
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: Structured feature selection
Block coordinate gradient descent
Gene expression
Microarray analysis
Prior knowledge

description: © 2016 Ghalwash et al. Background: Existing feature selection methods typically do not consider prior knowledge in the form of structural relationships among features. In this study, the features are structured based on prior knowledge into groups. The problem addressed in this article is how to select one representative feature from each group such that the selected features are jointly discriminating the classes. The problem is formulated as a binary constrained optimization and the combinatorial optimization is relaxed as a convex-concave problem, which is then transformed into a sequence of convex optimization problems so that the problem can be solved by any standard optimization algorithm. Moreover, a block coordinate gradient descent optimization algorithm is proposed for high dimensional feature selection, which in our experiments was four times faster than using a standard optimization algorithm. Results: In order to test the effectiveness of the proposed formulation, we used microarray analysis as a case study, where genes with similar expressions or similar molecular functions were grouped together. In particular, the proposed block coordinate gradient descent feature selection method is evaluated on five benchmark microarray gene expression datasets and evidence is provided that the proposed method gives more accurate results than the state-of-the-art gene selection methods. Out of 25 experiments, the proposed method achieved the highest average AUC in 13 experiments while the other methods achieved higher average AUC in no more than 6 experiments. Conclusion: A method is developed to select a feature from each group. When the features are grouped based on similarity in gene expression, we showed that the proposed algorithm is more accurate than state-of-the-art gene selection methods that are particularly developed to select highly discriminative and less redundant genes. In addition, the proposed method can exploit any grouping structure among features, while alternative methods are restricted to using similarity based grouping.