cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Some chiroptical effects on the photophysics and photochemistry of tris(bipyridine)ruthenium(II) ions in solution
Creators: name: Sparks, Robert Henry
Publisher: name: University of British Columbia
Year: 2010

description: The photoracemization of Ru(bipy)₃⁺⁺ in aqueous solution was studied. Quenching studies show the involvement of the (CT)³ Ru(bipy)₃⁺⁺ in the mechanism of racemization and the low quantum yield (2.9 x 10⁻⁴) shows that this state is asymmetric. Quenching studies show no increase of racemization rate for Ru(I) or (III) species. The temperature dependence gives evidence for a dissociative racemization mechanism. Quenching with Co(acac)₃ shows chiroselective electron transfer as measured by the resulting photochemistry.
Excitations of the One Dimensional Bose-Einstein Condensates in a Random Potential
Creators: name: Gurarie, V.
name: Refael, G.
name: Chalker, J. T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We examine bosons hopping on a one-dimensional lattice in the presence of a random potential at zero temperature. Bogoliubov excitations of the Bose-Einstein condensate formed under such conditions are localized, with the localization length diverging at low frequency as $\ell(ω)\sim 1/ω^α$. We show that the well known result $α=2$ applies only for sufficiently weak random potential. As the random potential is increased beyond a certain strength, $α$ starts decreasing. At a critical strength of the potential, when the system of bosons is at the transition from a superfluid to an insulator, $α=1$. This result is relevant for understanding the behavior of the atomic Bose-Einstein condensates in the presence of random potential, and of the disordered Josephson junction arrays.
Bilayer twisting as a mean to isolate connected flat bands in a Kagome lattice through Wigner crystallization
Creators: name: Wu, Jing
name: Xie, Yuee
name: Chen, Mingxing
name: Yuan, Jiaren
name: Yan, Xiaohong
name: Zhang, Shengbai
name: Chen, Yuanping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The physics of flat band is novel and rich but difficult to access. In this regard, recently twisting of bilayer van der Waals (vdW)-bounded two-dimensional (2D) materials has attracted much attention, because the reduction of Brillouin zone will eventually lead to a diminishing kinetic energy. Alternatively, one may start with a 2D Kagome lattice, which already possesses flat bands at the Fermi level, but unfortunately these bands connect quadratically to other (dispersive) bands, leading to undesirable effects. Here, we propose, by first-principles calculation and tight-binding modeling, that the same bilayer twisting approach can be used to isolate the Kagome flat bands. As the starting kinetic energy is already vanishingly small, the interlayer vdW potential is always sufficiently large irrespective of the twisting angle. As such the electronic states in the (connected) flat bands become unstable against a spontaneous Wigner crystallization, which is expected to have interesting interplays with other flat-band phenomena such as novel superconductivity and anomalous quantum Hall effect.
Zernike Basis to Cartesian Transformations
Creators: name: Mathar, Richard J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The radial polynomials of the 2D (circular) and 3D (spherical) Zernike functions are tabulated as powers of the radial distance. The reciprocal tabulation of powers of the radial distance in series of radial polynomials is also given, based on projections that take advantage of the orthogonality of the polynomials over the unit interval. They may play a role in the expansion of products of the polynomials into sums, which is demonstrated by some examples. Multiplication of the polynomials by the angular bases (azimuth, polar angle) defines the Zernike functions, for which we derive and tabulate transformations to and from the Cartesian coordinate system centered at the middle of the circle or sphere.
description: 31 pages. RevTex4
MPEC 2025-G40 : 2025 FZ21
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 FZ21

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Fluctuation-Driven Vortex Fractionalization in Topologically Ordered Superfluids of Cold Atoms
Creators: name: Song, Jun Liang
name: Zhou, Fei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have studied spin structures of fluctuation-driven fractionalized vortices and topological spin order in 2D nematic superfluids of cold sodium atoms. Our Monte Carlo simulations suggest a softened pi-spin disclination structure in a half-quantum vortex when spin correlations are short ranged; in addition, calculations indicate that a unique non-local topological spin order emerges simultaneously as cold atoms become a superfluid below a critical temperature. We have also estimated fluctuation-dependent critical frequencies for half-quantum vortex nucleation in rotating optical traps and discussed probing these excitations in experiments.
description: 5 pages, 2 figures; revised version accepted by Europhysics Letters
Slices of the Kerr ergosurface
Creators: name: Jacobson, Ted
name: Soong, Yee-Ann
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The intrinsic geometry of the Kerr ergosurface on constant Boyer-Lindquist (BL), Kerr, and Doran time slices is characterized. Unlike the BL slice, which had been previously studied, the other slices (i) do not have conical singularities at the poles (except the Doran slice in the extremal limit), (ii) have finite polar circumference in the extremal limit, and (iii) for sufficiently large spin parameter fail to be isometrically embeddable as a surface of revolution above some latitude. The Doran slice develops an embeddable polar cap for spin parameters greater than about 0.96.
description: 13 pages, 6 figures; v.2: minor editing for clarification, references added, typos fixed, version published in Classical and Quantum Gravity
BUILDING CAPACITY AND CAPABILITY WITH A HOSPITAL QUALITY IMPROVEMENT TRAINING PROGRAM
Creators: name: Sarff, Laura
Publisher: name: Zenodo
Year: 2018

description: Medical errors are the third leading cause of death in the US. To address medical errors and improve processes and outcomes, hospital staff needs training in quality improvement (QI) methodology. This study evaluated the Quality Academy Program (QAP), a 6-month QI training program at one 600-bed acute care tertiary safety net hospital. A quasi-experimental pretest posttest design with qualitative content analysis asked five research questions about three Waves of QAP participants (n = 63) using selfreported surveys. These questions asked whether evidence-based elements exist and if they were incorporated in the QAP. Additional questions asked if the QAP could build capacity in the organization and capability in hospital staff to improve patient outcomes. Thirty-nine evidence-based elements were identified in the literature. Paired samples ttests revealed significantly improved proficiency (p < .001). Qualitative content analysis identified positive themes from participants in the QAP. All Waves reported post Academy confidence of “somewhat” to “very confident,” demonstrating emerging capability. No significant differences were identified between Waves using KruskalWallis rank sum tests (p = . 443). Chi-square analysis was significant (p = .014 and p = .001) for participation in QI training post Academy, demonstrating developing organizational capacity. QAP participants completed 63 projects, where 16 demonstrated improved patient outcomes at the end of the training. There remains a lack of QI expertise in the practice setting, despite implementation of the QSEN initiative and the iv Institute of Medicine call to action. Organizations can develop QI training programs to meet this educational need, resulting in improved patient outcomes and reduced harm.
Dissipation and Extra Light in Galactic Nuclei: III. 'Core' Ellipticals and 'Missing' Light
Creators: name: Hopkins, Philip F.
name: Lauer, Tod R.
name: Cox, Thomas J.
name: Hernquist, Lars
name: Kormendy, John
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate how 'extra' central light in the surface brightness profiles of cusp ellipticals relates to the profiles of ellipticals with cores. Cusp elliptical envelopes are formed by violent relaxation in mergers acting on stars in progenitor disks, while their centers are structured by dissipational starbursts. Core ellipticals are formed by subsequent merging of (now gas-poor) cusp ellipticals, with the fossil starburst components combining to preserve a compact component in the remnant (although the 'transition' is smoothed). Comparing hydrodynamical simulations and observed profiles, we show how to observationally isolate the relic starburst components in core ellipticals. We demonstrate that these survive re-mergers and reliably trace the dissipation in the initial gas-rich merger(s). The typical degree of dissipation is a strong function of stellar mass, tracing observed disk gas fractions. We find a correlation between dissipation and effective radius: systems with more dissipation are more compact. The survival of this component and scattering of stars into the envelope naturally explain high-Sersic index profiles characteristic of massive core ellipticals. This is also closely related to the kinematics and isophotal shapes: only systems with matched starburst components from their profile fits also reproduce the observed kinematics of boxy/core ellipticals. We show that it is critical to adopt physically motivated profiles when attempting to quantify how much mass has been 'scoured' or scattered out of the inner regions by binary black holes. Estimates of scoured mass ignoring multi-component structure can be strongly biased, potentially explaining observed systems with large inferred core masses in apparent conflict with core-scouring models.
description: 48 pages, 37 figures, accepted to ApJ (revised to match accepted version; added comparison of kinematics and isophotal shapes)
Discovery in IC10 of the farthest known symbiotic star
Creators: name: Goncalves, Denise R.
name: Magrini, Laura
name: Munari, Ulisse
name: Corradi, Romano L. M.
name: Costa, Roberto D. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of the first known symbiotic star in IC10, a starburst galaxy belonging to the Local Group, at a distance of ~750kpc. The symbiotic star was identified during a survey of emission-line objects. It shines at V = 24.62+-0.04, V - R_C = 2.77+-0.05 and R_C - I_C = 2.39+-0.02 and suffers from E(B-V) = 0.85+-0.05 reddening. The spectrum of the cool component well matches that of solar neighborhood M8III giants. The observed emission lines belong to Balmer series, [SII], [NII] and [OIII]. They suggest a low electronic density, negligible optical depth effects and 35,000K < T_eff < 90,000K for the ionizing source. The spectrum of the new symbiotic star in IC10 is an almost perfect copy of that of Hen 2-147, a well known Galactic symbiotic star and Mira.
description: 5 pages including 3 figures. MNRAS Letters accepted. Also available at http://pessoais.ov.ufrj.br/denise/
Fast Power Series Solution of Large 3-D Electrodynamic Integral Equation for PEC Scatterers
Creators: name: Negi, Yoginder Kumar
name: Balakrishnan, N.
name: Rao, Sadasiva M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper presents a new fast power series solution method to solve the Hierarchal Method of Moment(MoM) matrix for a large complex,perfectly electric conducting (PEC) 3D structures. The proposed power series solution converges in just two iterations which is faster than the conventional fast solver-based iterative solution. The method is purely algebraic in nature and, as such applicable to existing conventional methods. The method uses regular fast solver Hierarchal Matrix (H-Matrix) and can also be applied to Multilevel Fast Multipole Method Algorithm(MLFMA). In the proposed method, we use the scaling of the symmetric near-field matrix to develop a diagonally dominant overall matrix to enable a power series solution. Left and right block scaling coefficients are required for scaling near-field blocks to diagonal blocks using Schur's complement method. However,only the right-hand scaling coefficients are computed for symmetric near-field matrix leading to saving of computation time and memory. Due to symmetric property, the left side-block scaling coefficients are just the transpose of the right-scaling blocks. Next, the near-field blocks are replaced by scaled near-field diagonal blocks. Now the scaled near-field blocks in combination with far-field and scaling coefficients are subjected to power series solution terminating after only two terms. As all the operations are performed on the near-field blocks, the complexity of scaling coefficient computation is retained as O(N). The power series solution only involves the matrix-vector product of the far-field, scaling coefficients blocks, and inverse of scaled near-field blocks. Hence, the solution cost remains O(NlogN). Several numerical results are presented to validate the efficiency and robustness of the proposed numerical method.
Special points of the Brownian net
Creators: name: Schertzer, Emmanuel
name: Sun, Rongfeng
name: Swart, Jan M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 82C21;60K35; 60D05

description: The Brownian net, which has recently been introduced by Sun and Swart [SS08], and independently by Newman, Ravishankar and Schertzer [NRS08], generalizes the Brownian web by allowing branching. In this paper, we study the structure of the Brownian net in more detail. In particular, we give an almost sure classification of each point in $R^2$ according to the configuration of the Brownian net paths entering and leaving the point. Along the way, we establish various other structural properties of the Brownian net.
description: In this revision the main improvements are in the presentation. Parts of the introduction have been rewritten and extended and some figures have been added. We also added an overview of global notation. 55 pages, 7 figures
The CARMENES search for exoplanets around M dwarfs. Stellar atmospheric parameters of target stars with SteParSyn
Creators: name: Marfil, Emilio
name: Tabernero, Hugo M.
name: Montes, David
name: Caballero, Jose A.
name: Lazaro, Francisco J.
name: Hernandez, Jonay I. Gonzalez
name: Nagel, Evangelos
name: Passegger, Vera M.
name: Schweitzer, Andreas
name: Ribas, Ignasi
name: Reiners, Ansgar
name: Quirrenbach, Andreas
name: Amado, Pedro J.
name: Cifuentes, Carlos
name: Cortes-Contreras, Miriam
name: Dreizler, Stefan
name: Duque-Arribas, Christian
name: Galadi-Enriquez, David
name: Henning, Thomas
name: Jeffers, Sandra V.
name: Kaminski, Adrian
name: Kurster, Martin
name: Lafarga, Marina
name: Lopez-Gallifa, Alvaro
name: Morales, Juan Carlos
name: Shan, Yutong
name: Zechmeister, Mathias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We determined effective temperatures, surface gravities, and metallicities for a sample of 343 M dwarfs observed with CARMENES, the double-channel, high-resolution spectrograph installed at the 3.5 m telescope at Calar Alto Observatory. We employed SteParSyn, a Bayesian spectral synthesis implementation particularly designed to infer the stellar atmospheric parameters of late-type stars following a Markov chain Monte Carlo approach. We made use of the BT-Settl model atmospheres and the radiative transfer code turbospectrum to compute a grid of synthetic spectra around 75 magnetically insensitive Fe I and Ti I lines plus the TiO $γ$ and $ε$ bands. To avoid any potential degeneracy in the parameter space, we imposed Bayesian priors on Teff and log g based on the comprehensive, multi-band photometric data available for the sample. We find that this methodology is suitable down to M7.0 V, where refractory metals such as Ti are expected to condense in the stellar photospheres. The derived $T_{\rm eff}$, $\log{g}$, and [Fe/H] range from 3000 to 4200 K, 4.5 to 5.3 dex, and -0.7 to 0.2 dex, respectively. Although our $T_{\rm eff}$ scale is in good agreement with the literature, we report large discrepancies in the [Fe/H] scales, which might arise from the different methodologies and sets of lines considered. However, our [Fe/H] is in agreement with the metallicity distribution of FGK-type stars in the solar neighbourhood and correlates well with the kinematic membership of the targets in the Galactic populations. Lastly, excellent agreement in $T_{\rm eff}$ is found for M dwarfs with interferometric angular diameter measurements, as well as in the [Fe/H] between the components in the wide physical FGK+M and M+M systems included in our sample.
description: 42 pages, 32 figures. Accepted for publication in A&A
FEATURES OF THE CLINICAL COURSE OF VISCEROPTOSIS IN COMBINATION WITH CHRONIC COLOSTASIS
Creators: name: Khusanov, S.M.
name: Botirov, A.K.
name: Mamajonova, D.M.
name: Botirov, J.A.
Publisher: name: Zenodo
Year: 2025

description: Visceroptosis has several synonyms (enteroptosis, splanchnoptosis, Glenard syndrome; from Greek σπλάγχνα – internal organs and πτῶσις – prolapse) [2;4]. According to various researchers, visceroptosis is complicated by chronic colostasis in 30-40% of cases and is one of the common diseases among the working-age population [3]. The prevalence rate is unknown, as the disease presents clinical symptoms in only 10-20% of cases [1].
Additional file 11 of Prostaglandin EP2 receptor antagonist ameliorates neuroinflammation in a two-hit mouse model of Alzheimer’s disease
Creators: name: Banik, Avijit
name: Amaradhi, Radhika
name: Lee, Daniel
name: Sau, Michael
name: Wang, Wenyi
name: Dingledine, Raymond
name: Ganesh, Thota
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 11. Table S1. Consumption rate of TG11-77 for mice in cohort 1 and cohort 2. The consumption rate was measured based on the weekly average body weight (g) and volume consumed (ml/day). The final drug concentration was measured based on 92.5% compound recovery of the actual dose from drinking water after 7 days at room temperature. Formula used for daily drug (free base) consumption (mg/kg/day) = ((solution consumed*0.5*1000)/body weight) *0.847). Factor 0.847 was obtained from the ratio of molecular weight between HCl salt and free base of the drug (400/472). We have also looked at consumption rates separately in males and females. Male mice consumed more drinking water than females but it was proportional to their body weights and no differences were found between sexes.
Relic density in SO(10) SUSY GUT models
Creators: name: Huitu, Katri
name: Laamanen, Jari
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Non-universal boundary conditions in grand unified theories can lead to non-universal gaugino masses at the unification scale. In R-parity preserving theories the lightest supersymmetric particle is a natural candidate for the dark matter. In this talk the composition of the lightest neutralino is studied, when nonuniversal gaugino masses come from representations of SO(10). In these cases, the thermal relic density compatible with WMAP observations is found.
description: Three pages, one figure. Latex with AIP-class. The present article has been submitted for publication in the AIP Conference Proceedings of SUSY08, June 16-21, 2008 Seoul, Korea. After it is published, it will be found at http://proceedings.aip.org/proceedings
Squash root microbiome transplants and metagenomic inspection for in situ arid adaptations
Creators: name: Hernández-Álvarez, Cristóbal
name: García-Oliva, Felipe
name: Cruz-Ortega, Rocío
name: Romero, Miguel F.
name: Barajas, Hugo R.
name: Piñero, Daniel
name: Alcaraz, Luis D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Genomics (q-bio.GN)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Arid zones contain a diverse set of microbes capable of survival under dry conditions, some of which can form relationships with plants under drought stress conditions to improve plant health. We studied squash (Cucurbita pepo L.) root microbiome under historically arid and humid sites, both in situ and performing a common garden experiment. Plants were grown in soils from sites with different drought levels, using in situ collected soils as the microbial source. We described and analyzed bacterial diversity by 16S rRNA gene sequencing (N=48) from the soil, rhizosphere, and endosphere. Proteobacteria were the most abundant phylum present in humid and arid samples, while Actinobacteriota abundance was higher in arid ones. The Beta-diversity analyses showed split microbiomes between arid and humid microbiomes, and aridity and soil pH levels could explain it. These differences between humid and arid microbiomes were maintained in the common garden experiment, showing that it is possible to transplant in situ diversity to the greenhouse. We detected a total of 1009 bacterial genera; 199 exclusively associated with roots under arid conditions. With shotgun metagenomic sequencing of rhizospheres (N=6), we identified 2969 protein families in the squash core metagenome and found an increased number of exclusively protein families from arid (924) than humid samples (158). We found arid conditions enriched genes involved in protein degradation and folding, oxidative stress, compatible solute synthesis, and ion pumps associated with osmotic regulation. Plant phenotyping allowed us to correlate bacterial communities with plant growth. Our study revealed that it is possible to evaluate microbiome diversity ex-situ and identify critical species and genes involved in plant-microbe interactions in historically arid locations.
description: published in Science of The Total Environment (2021)
VIRTUAL OLAMDAGI O'ZBEK ISMLARINING LEKSIK VA SEMANTIK TABIATI
Creators: name: Mustafayev, Sh.B.
Publisher: name: Zenodo
Year: 2025

description: The transition between the 20th and 21st centuries marked the rapid integration of computer technologies, shaping new communication processes. Virtual onomastics, the use of personal names in virtual interactions, reveals distinct linguistic features. This paper examines the structure, thematic categories, and linguistic characteristics of nicknames used in Uzbek virtual communication. Anthropomorphic, mixed, appellative, and alphanumeric patterns are identified, highlighting tendencies toward anonymity and individuality. The analysis of virtual communication sheds light on the interplay between the Uzbek language and international linguistic practices.
Lifetimes of tidally limited star clusters with different radii
Creators: name: Gieles, M.
name: Baumgardt, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the escape rate, dN/dt, from clusters with different radii in a tidal field using analytical predictions and direct N-body simulations. We find that dN/dt depends on the ratio R=r_h/r_j, where r_h is the half-mass radius and r_j the radius of the zero-velocity surface. For R>0.05, the "tidal regime", there is almost no dependence of dN/dt on R. To first order this is because the fraction of escapers per relaxation time, t_rh, scales approximately as R^1.5, which cancels out the r_h^1.5 term in t_rh. For R<0.05, the "isolated regime", dN/dt scales as R^-1.5. Clusters that start with their initial R, Ri, in the tidal regime dissolve completely in this regime and their t_dis is insensitive to the initial r_h. We predicts that clusters that start with Ri<0.05 always expand to the tidal regime before final dissolution. Their t_dis has a shallower dependence on Ri than what would be expected when t_dis is a constant times t_rh. For realistic values of Ri, the lifetime varies by less than a factor of 1.5 due to changes in Ri. This implies that the "survival" diagram for globular clusters should allow for more small clusters to survive. We note that with our result it is impossible to explain the universal peaked mass function of globular cluster systems by dynamical evolution from a power-law initial mass function, since the peak will be at lower masses in the outer parts of galaxies. Our results finally show that in the tidal regime t_dis scales as N^0.65/w, with w the angular frequency of the cluster in the host galaxy. [ABRIDGED]
DESEMPENHO DA CULTURA DA ALFACE EM SUBSTRATOS ALTERNATIVOS
Creators: name: Fernanda Fernandes DE SOUSA
name: Geovânia Pimenta LEÃO
name: Ronaldo Pereira LIMA
Publisher: name: Zenodo
Year: 2024
Subjects: Cultura de alface
Substratos
Lactuca sativa L

description: RESUMO

A alface (Lactuca sativa L.), da família Asteraceae de origem asiática, é uma hortaliça com grande potencial nutritivo e economics. Ela cresce em forma de roseta ao redor do caule, com diferentes tipos de alface lisas e crespas, que podem formar ou não "cabeça" com coloração em diferentes tons de verde ou roxo. Por ser rica em minerais e saudável na alimentação humana, a alface é uma das hortaliças folhosas mais consumidas, por isso a produção de mudas de qualidade é crucial para o cultivo da hortaliça. O solo é responsável pelo crescimento e desenvolvimento das plantas, fornecendo os nutrientes necessários para sua produção. No entanto, uma prática crescente na produção de alface é a produção em bandejas de substrato, que seria o cultivo sem solo. O cultivo em substratos tem muitas vantagens, como o manejo hídrico adequado, evitando o excesso de umidade nas raízes. Ao escolher um substrato, deve-se levar em conta a capacidade dele de armazenar água e, além disso, manter o nível de oxigênio adequado, para favorecer a atividade fisiológica da raiz e evitar a proliferação de doenças radiculares e podridões fúngicas e bacterianas. No entanto, cada cultura tem uma necessidade nutricional diferente e o substrato ideal deve ser baseado nelas.
Tetraphenylporphyrin dimers and their derivatives
Creators: name: Zingoni, Jesmael P.
Publisher: name: University of British Columbia
Year: 2010

description: Tetraphenylporphine (TPP) and its para-methyl derivative have been synthesized by direct reaction of pyrrole with the corresponding aldehyde. The synthesis of two unsymmetrically substituted tetraarylporphyrins is reported. The compounds prepared are' 5-(4-hydroxypheny1) -10,15,20-tritolyIporphyrin and 5-(4-hydroxypheny1)-10, 15,20-triphenyIporphyrin. The sy thesis of covalently linked porphyrin dimers, joined via ether linkages, is described. High yields of the tetraaryIporphyrin dimers were obtained by the reaction of the bi-functional1,6-ditosyloxyhexane with phenolic porphyrins such as 5-(4-hydroxypheny1)-10,15,20-tritoly1-porphyrin. The dimeric porphyrins were then chromatographically separated from the unreacted monomericLporphyrins. The reduction of the porphyrins(monomers and dimers) has been carried out using the standard diimide precursor, p-toluenesulfonylhydrazine. We have been able to demonstrate that the most efficient chlorin preparation involves the diimide reduction of a tetraaryIporphyrin to the corresponding bacteriochlorin, followed by the addition of the "high potential quinone" DDQ, to dehydro-genate the bacteriochlorin. A detailed study of the absorption spectra of these chlorins and bacteriochlorins was undertaken. Zinc metallo-derivatives of the porphyrins, chlorins and bacteriochlorins were prepared by the reaction of the free bases with zinc acetate in dry pyridine. An attempt was made to synthesize tetra-meso-[p, p ' - ( 3, 3 '-phenoxypropoxypheny1)]-strati-bis porphyrin (Compound XX), a novel cyclophane system composed of two opposed, co-axial porphyrin rings, rigidly held together by peripheral ether linkages. The synthesis was attempted by construction of a second porphyrin ring on top of a pre-existing one, by way of the condensation of four pyrroles with a tetraaldehyde, derivative of tetraphenyl-porphyrin, under high dilution conditions. The last reaction step was unsuccessful. The structures and purity of the intermediate compounds leading to the strati-bis-porphyrin were established by mass spectroscopy and proton n.m.r. spectroscopy.
The dependence of the fraction of radio luminous quasars on redshift and its theoretical implications
Creators: name: Rusinek-Abarca, Katarzyna
name: Sikora, Marek
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: While radio emission in quasars can be contributed to by a variety of processes (involving star forming regions, accretion disk coronas and winds, and jets), the powering of the radio loudest quasars must involve very strong jets, presumably launched by the Blandford-Znajek mechanism incorporating the magnetically arrested disk (MAD) scenario. We focus on the latter and investigate the dependence of their fraction on redshift. We also examine the dependence of the radio-loud fraction (RLF) on BH mass ($M_{\rm BH}$) and Eddington ratio ($λ_{\rm Edd}$) while excluding the redshift bias by narrowing its range. In both these investigations we remove the bias associated with: (1) the diversity of source selection by constructing two well-defined, homogeneous samples of quasars (first within $0.7 \leq z < 1.9$, second within $0.5 \leq z < 0.7$); (2) a strong drop in the RLF of quasars at smaller BH masses by choosing those with BH masses larger than $10^{8.5} M_{\odot}$. We confirm some previous results showing the increase in the fraction of radio-loud quasars with cosmic time and that this trend can be even steeper if we account for the bias introduced by the dependence of the RLF on BH mass whereas the bias introduced by the dependence of the RLF on Eddington ratio is shown to be negligible. Assuming that quasar activities are triggered by galaxy mergers we argue that such an increase can result from the slower drop with cosmic time of mixed mergers than of wet mergers.
description: 15 pages, 4 figures. Accepted for publication in ApJ
Triple-frequency meteor radar full wave scattering Measurements and comparison to theory
Creators: name: Stober, G.
name: Brown, P.
name: Campbell-Brown, M.
name: Weryk, R. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. Radar scattering from meteor trails depends on several poorly constrained quantities, such as electron line density, q, initial trail radius, r0, and ambipolar diffusion coefficient, D. Aims. The goal is to apply a numerical model of full wave backscatter to triple frequency echo measurements to validate theory and constrain estimates of electron radial distribution, initial trail radius, and the ambipolar diffusion coefficient. Methods. A selection of 50 transversely polarized and 50 parallel polarized echoes with complete trajectory information were identified from simultaneous tri-frequency echoes recorded by the Canadian Meteor Orbit Radar (CMOR). The amplitude-time profile of each echo was fit to our model using three different choices for the radial electron distribution assuming a Gaussian, parabolicexponential, and 1-by-r2 electron line density model. The observations were manually fit by varying, q, r0, and D per model until all three synthetic echo-amplitude profiles at each frequency matched observation. Results. The Gaussian radial electron distribution was the most successful at fitting echo power profiles, followed by the 1-by-r2. We were unable to fit any echoes using a profile where electron density varied from the trail axis as an exponential-parabolic distribution. While fewer than 5% of all examined echoes had self-consistent fits, the estimates of r0 and D as a function of height obtained were broadly similar to earlier studies, though with considerable scatter. Most meteor echoes are found to not be described well by the idealized full wave scattering model.
title: Frontmatter, Table of Contents, Preface, Conference Organization
Creators: name: Schmidt-Schauss, Manfred
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2011
Subjects: subject: Frontmatter
subject: Table of Contents
subject: Preface
subject: Conference Organization

description: Frontmatter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 10, 22nd International Conference on Rewriting Techniques and Applications (RTA'11), pages i-xvi
Oddness from Rigidness
Creators: name: Forste, Stefan
name: Zavala, Ivonne
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revisit the problem of constructing type IIA orientifolds on T^6/(Z2 x Z2) which admit (non)-factorisable lattices. More concretely, we consider a (Z2 x Z2') orientifold with torsion, where D6-branes wrap rigid 3-cycles. We derive the model building rules and consistency conditions in the case where the compactification lattice is non-factorisable. We show that in this class of configurations, (semi) realistic models with an odd number of families can be easily constructed, in contrast to compactifications where the D6-branes wrap non-rigid cycles. We also show that an odd number of families can be obtained in the factorisable case, without the need of tilted tori. We illustrate the discussion by presenting three family Pati-Salam models with no chiral exotics in both factorisable and non-factorisable toroidal compactifications.
description: 20 pages
Immortalization of primary marmoset skin fibroblasts by CRISPR-Cas9-mediated gene targeting
Creators: name: Jeong, Yeon-Ju
name: Cho, Jeongin
name: Kwak, Jina
name: Sung, Young Hoon
name: Kang, Byeong-Cheol
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: 60506 Virology

description: Immortalized cell lines can be used for diverse in vitro experiments, providing invaluable data before conducting in vivo studies Callithrix jacchus, the common marmoset, is a non-human primate model utilized for studying various human diseases. However, only a few immortalized marmoset cell lines are currently available. In the present study, we reveal that CRISPR-Cas9-mediated targeting of the p53 gene or CDKN2A locus is an effective means for immortalizing primary marmoset skin fibroblasts. In addition to frameshift mutations that result in premature stop codons, in-frame mutations potentially destroying the DNA-binding motif of p53 are frequently detected in immortalized cells. Like Cdkn2a-deficient mouse cells, CDKN2A-deficient marmoset cells express wild-type p53 proteins normally respond to genotoxic stresses, including adriamycin and etoposide. Taken together, these findings indicate that Cas9- mediated gene targeting of the p53 gene or CDKN2A locus is an effective tool for establishing immortalized marmoset cell lines with defined genetic alterations.
LRRK2 decreases microglial actin dynamics by filamentous actin depolymerization and Rac1 inhibition
Creators: name: Kim, Beomsue
name: Suh, Young Ho
name: Joe, Eunhye
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: An active actin dynamic is a crucial feature of brain microglia. Here we report that LRRK2, a primary familial Parkinson’s disease-associated gene, negatively regulates microglia’s actin dynamics. LRRK2 depolymerized filamentous actin (F-actin) by directly binding to it or inhibiting microglia’s Rac-PAK signaling. LRRK2 knockdown resulted in a reduced ruffle and enhanced lamellipodia formation of ADP-activated microglia, altering the microglia’s physiological activity to vigorous migration toward damaged cells. These results suggest that LRRK2 is a negative regulator for the controlled actin dynamics in microglia.
Proofs, Circuits, and Communication
Creators: name: de Rezende, Susanna F.
name: Göös, Mika
name: Robere, Robert
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: We survey lower-bound results in complexity theory that have been obtained via newfound interconnections between propositional proof complexity, boolean circuit complexity, and query/communication complexity. We advocate for the theory of total search problems (TFNP) as a unifying language for these connections and discuss how this perspective suggests a whole programme for further research.
On geometric complexity of earthquake focal zone and fault system: A statistical study
Creators: name: Kagan, Yan Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geophysics (physics.geo-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We discuss various methods used to investigate the geometric complexity of earthquakes and earthquake faults, based both on a point-source representation and the study of interrelations between earthquake focal mechanisms. We briefly review the seismic moment tensor formalism and discuss in some detail the representation of double-couple (DC) earthquake sources by normalized quaternions. Non-DC earthquake sources like the CLVD focal mechanism are also considered. We obtain the characterization of the earthquake complex source caused by summation of disoriented DC sources. We show that commonly defined geometrical fault barriers correspond to the sources without any CLVD component. We analyze the CMT global earthquake catalog to examine whether the focal mechanism distribution suggests that the CLVD component is likely to be zero in tectonic earthquakes. Although some indications support this conjecture, we need more extensive and significantly more accurate data to answer this question fully.
description: 53 pages text, 12 figures
Permutations with Kazhdan-Lusztig polynomial P_{id,w}(q) = 1 + q^h
Creators: name: Woo, Alexander
name: Billey, Sara
name: Weed, Jonathan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14M15, 05E15, 20F55

description: Using resolutions of singularities introduced by Cortez and a method for calculating Kazhdan-Lusztig polynomials due to Polo, we prove the conjecture of Billey and Braden characterizing permutations w with Kazhdan-Lusztig polynomial P_{id,w}(q)=1+q^h for some h.
description: 30 pages, 8 figures. Main body is by Woo, appendix by Billey and Weed
TEMURIY SHOHRUH MIRZONING MISR DAVLATI BILAN XALQARO ELCHILIK ALOQALARI
Creators: name: Turdimirzayev, Jahongir
Publisher: name: Zenodo
Year: 2025

description: Sohibqiron vafot etgandan so‘ng farzand va nabiralar o‘rtasida toj-u taxt uchun kurash avj oladi va yakunda Shohruh mirzo hukmdorlikni qo‘lga olib poytaxni Samarqand shahridan Hirot shahriga ko‘chiradi. Shu vaqtdan boshlab Hirot shahrining poytaxt sifatida nufuzi yanada ortadi. Ma’lumki Temuriylar davlati dunyoning eng qudratli saltanatlaridan biri edi. Shu sababdan ko‘plab mamlakat hukmdorlari bu sulala bilan yaxshi aloqa va savdo-elchilik munosabitda bo‘lishga intilgan. Jumladan Temuriylar davlatiga Mo‘g‘iliston, Tibet, Xitoy, Hindiston, Arabiston, Misr, Kichik Osiyo, Kavkaz, Boltiqbo‘yi, Ural o‘lkalaridan savdo karvonlari va elchilar kelgan . Sohibqiron davrida ham Xitoydan bir-necha marta elchilar kelgan va bu uning vorisi Shohruh mirzo davrida ham davom etadi.
Moduli Stabilization and Supersymmetry Breaking in Deflected Mirage Mediation
Creators: name: Everett, Lisa L.
name: Kim, Ian-Woo
name: Ouyang, Peter
name: Zurek, Kathryn M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a model of supersymmetry breaking in which the contributions from gravity/modulus, anomaly, and gauge mediation are all comparable. We term this scenario "deflected mirage mediation," which is a generalization of the KKLT-motivated mirage mediation scenario to include gauge mediated contributions. These contributions deflect the gaugino mass unification scale and alter the pattern of soft parameters at low energies. In some cases, this results in a gluino LSP and light stops; in other regions of parameter space, the LSP can be a well-tempered neutralino. We demonstrate explicitly that competitive gauge-mediated terms can naturally appear within phenomenological models based on the KKLT setup by addressing the stabilization of the gauge singlet field which is responsible for the masses of the messenger fields. For viable stabilization mechanisms, the relation between the gauge and anomaly contributions is identical in most cases to that of deflected anomaly mediation, despite the presence of the Kahler modulus. Turning to TeV scale phenomenology, we analyze the renormalization group evolution of the supersymmetry breaking terms and the resulting low energy mass spectra. The approach sets the stage for studies of such mixed scenarios of supersymmetry breaking at the LHC.
description: 33 pages, 8 figures. Published version in Journal of High Energy Physics
Propagation of Exchange Bias in CoFe/FeMn/CoFe Trilayers
Creators: name: Nam, D. N. H.
name: Chen, W.
name: West, K. G.
name: Kirkwood, D. M.
name: Lu, J.
name: Wolf, S. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: CoFe/FeMn, FeMn/CoFe bilayers and CoFe/FeMn/CoFe trilayers were grown in magnetic field and at room temperature. The exchange bias field $H_{eb}$ depends strongly on the order of depositions and is much higher at CoFe/FeMn than at FeMn/CoFe interfaces. By combining the two bilayer structures into symmetric CoFe/FeMn($t_\mathrm{FeMn}$)/CoFe trilayers, $H_{eb}^t$ and $H_{eb}^b$ of the top and bottom CoFe layers, respectively, are both enhanced. Reducing $t_\mathrm{FeMn}$ of the trilayers also results in enhancements of both $H_{eb}^b$ and $H_{eb}^t$. These results evidence the propagation of exchange bias between the two CoFe/FeMn and FeMn/CoFe interfaces mediated by the FeMn antiferromagnetic order.
The chemistry of group 6 and 7 transition metal organometallic nitrosyl complexes
Creators: name: Kolthamer, Brian William Stirling
Publisher: name: University of British Columbia
Year: 2010

description: Nitrosyl chloride exhibits a number of different reaction modes in its reactions with monomeric and dimeric neutral carbonyl complexes of transition metals. From its reaction with [CpCr(CO)₃]₂ under controlled conditions, the organometallic compounds CpCr (CO)₂(NO) , CpCr(NO)₂Cl, [CpCrCl2]2, and [CpCr (NO) Cl₂]₂ can be obtained. In contrast.,, the analogous [CpM(CO)₃] ₂ (M — Mo or W) compounds react with C1N0 to produce CpM(CO)3Cl and CpM(NO)₂Cl in comparable yields. The (arene)M(CO)₃ (M = Mo or W) compounds form the polymeric [M(NO)2Cl2]n species via labile M (CO)₂(NO) 2Cl₂ intermediates under identical experimental conditions. Possible pathways leading to the formation of all products are presented. Trithiazyl trichloride, N₃S₃Cl₃, introduces the thionitrosyl group onto a metal centre during the reaction. Na[CpCr (CO)₃] + (1/3) N₃S₃3Cl₃ • CpCr (CO)₂(NS) An x-ray crystallographic analysis of this complex shows that the thionitrosyl group coordinates essentially linearly to the chromium via the nitrogen atom. A second product formed in this reaction, Cp₂Cr₂ (CO)₄S, possesses a novel Cr-S-Cr linkage which is linear, short, and chemically inert The cations, [(RC₅H₄)Mn(CO)₂(NO)] + (R = H or Me) react with I in acetone at room temperature to produce (RC₅H₄)Mn(CO)₂(NO)I. These species have very labile CO ligand which are readily displaced by Lewis bases to produce (RC₅H₄) - Mn(L) (NO)I [R = H, L = PPh₃ or P(OPh)₃; R = Me, L = PPh3, P(OPh)₃, or P(C₆H₁₁:L)₃]. The reactions of Br-, Cl⁻, and NO₂⁻ with [(RC₅H₄)Mn(CO)2(NO)]⁺ produce the unusual bimetallic compounds (RC₅H₄)₂Mn₂ (NO) ₃X (R == H or Me; X = Cl, Br, or N₂) The compound [CpCr(NO)2]2 abstracts all of the chlorine ligands from SnCl₄, MCl₂ (M = Hg, Sn, or Pb), CpFe-(CO)₂Cl, and Mn(CO)₅Cl in. refluxing thf to form CpCr(NO)₂Cl. The other products are the metals (M), [CpFe(CO)₂]₂, and Mn₂(CO)₁₀, respectively. The chromium dimer also abstracts halogen from vic-dihaloalkanes to produce the corresponding alkenes in good yields.