cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Accumulation and distribution of some heavy metals in water, soil and rice fields along the Pradu and Phi Lok canals, Samut Songkhram province, Thailand
Creators: name: Roongrawee Kingsawat, Raywadee Roachanakanan
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากรศาสตร์
Year: 2011
Subjects: Heavy Metal,Organic and Conventional Paddy Field,Rice

description: 1, 9, Environment and Natural Resources Journal
Extracting more biologically relevant features from multiplexed imaging with a Multi-Encoder Variational AutoEncoder (ME-VAE)
Creators: name: Ternes, Luke
name: Dane, Mark
name: Labrie, Marilyne
name: Mills, Gordon
name: Gray, Joe
name: Heiser, Laura
name: Chang, Young Hwan
Publisher: name: F1000 Research Limited
Year: 2021

description: Emerging high-dimensional multiplexed imaging techniques enable measurements of expression and subcellular spatial distribution for tens of markers in single cells and facilitate our understanding of heterogeneous cell phenotypes. Encoding single cell representations as quantitative measurements is an essential part of image-based cell phenotyping; however, due to the lack of robust methods for extracting relevant features, defining suitable representations to capture the complex high-dimensional multiplexed imaging features remains a challenge. Variational Autoencoders1 (VAEs) can create relevant descriptors of images by encoding the features into a compressed latent space and outperform handcrafted features for differentiating data. Despite the VAE’s success on related tasks such as tissue feature extraction2, VAEs struggle at identifying biologically informative features in single cell imaging data due to the amount of uninformative technical variation, which the architectures are hypersensitive to. In order to extract biologically meaningful high-dimensional representations, we propose a multi-encoder VAE (ME-VAE) for single cell multiplexed image analysis, using transformed image pairs along parallel encoders as a self-supervised signal to extract transform-invariant features. Using parallel encoders and a shared latent space encourages mutual information between transformations and discourages unshared transformation specific information. We demonstrate that the ME-VAE improves the clusterability of known cell populations from different ligand-treated populations, removes undesired features from the latent space, and better extracts novel biologically relevant features. Our ME-VAE outperforms traditional image features3, standard VAEs, as well as the current state-of-the-art approaches such as Beta-VAEs4 and Invariant C-VAEs5, which were designed to make interpretable latent spaces with less noisy features. We also show how the ME-VAE can be used to interpret key cellular differences and guide the development of new feature representations, which result in improved performance compared to traditional imaging features. Finally, we apply ME-VAE to other multiplexed imaging modalities and demonstrate generalizability of the proposed approach.
Management della verità. Il valore della persona nella formazione, nelle organizzazioni e nel lavoro
Creators: name: Grisi, Cesare
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: M-PSI/06 Psicologia del lavoro e delle organizzazioni
SECS-P/12 Storia economica
SPS/09 Sociologia dei processi economici e del lavoro

description: "IL MANAGEMENT DELLA VERITA'" è uno studio sulla tematica del valore della persona nel contesto lavorativo, presa in considerazione da molteplici punti di vista. Ha un taglio multidisciplinare e sottopone il soggetto della trattazione a diverse chiavi di lettura, evitando gli stereotipi della specializzazione irrelata. Lo spunto che serve da abbrivio è di dare una spiegazione ad un fenomeno assai diffuso nel mondo del lavoro, nelle organizzazioni e nella formazione: il compulsivo ricorso al "valore della persona". La perplessità che deriva dall’uso di questo leitmotiv scaturisce, a fronte di una analisi documentata da uno studio bibliografico comparativo, dalla discrasia tra la proposizione di ideali verso cui i lavoratori sono orientati, e la mancata corrispondenza di azioni coerenti, spesso anzi rivolte a fini diametralmente opposti: la persona posta di fronte a questa incoerenza di fondo come reagisce? La gran parte della letteratura, della pratica formativa e del management mostrano infatti di non incidere sul cambiamento verso cui dicono di tendere: ciò significa che il pubblico a cui si rivolgono (lavoratori, formatori, studiosi, management, potremo dire: praticamente tutti!) non assume il frutto del loro lavoro. Nel saggio si mostrano esempi desunti dalla contemporaneità del mondo del lavoro in cui si mette in luce che la separazione tra fini ostentati e fini perseguiti si connette strettamente con le dinamiche del potere e del business: che ruolo hanno allora i teorici, i formatori, il management? Ovvero coloro che sono chiamati a far luce nell’ecosistema lavorativo? Cosa realmente c’è nel fondo dell’ostentazione del valore della persona? L'analisi proposta entra nelle trame di tre fattori cardine e li mette in connessione tra di loro: 1) la motivazione che spinge l'organizzazione a strutturare la sua missione e le sue azioni; 2) il fine ultimo che il singolo ricerca nel proprio lavoro; 3) l'ambito di azione della formazione, la quale ha un ruolo primario, sebbene abbia vincoli che sovente ne sfumano l'effetto. In questo saggio, scritto, mi pare, con mano letteraria, si affronta il tema quasi sempre evaso dagli addetti ai lavori e dagli ‘stakeholders’, perché cruciale e proprio per questo sconveniente e pericoloso: il ruolo degli interessi economici nella formazione e nel lavoro. Tematica del tutto contemporanea e di primaria importanza.
Sphere penetration by impact in a granular medium: A collisional process
Creators: name: Seguin, Antoine
name: Bertho, Yann
name: Gondret, Philippe
name: Crassous, Jerome
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The penetration by a gravity driven impact of a solid sphere into a granular medium is studied by two-dimensional simulations. The scaling laws observed experimentally for both the final penetration depth and the stopping time with the relevant physical parameters are here recovered numerically without the consideration of any solid friction. Collisional processes are thus found as essential in explaining the physics of the qualitatively observed phenomena whereas frictional processes can only be considered as secondary effects in the granular penetration by impact.
description: 6 pages, 7 figures
Measuring the Superfluid Fraction of an Ultracold Atomic Gas
Creators: name: Cooper, Nigel R.
name: Hadzibabic, Zoran
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We propose a method to measure the superfluid fraction of an atomic gas. The method involves the use of a vector potential generated by optical beams with non-zero angular momentum to simulate uniform rotation. The induced change in angular momentum of the atomic gas can be measured spectroscopically. This allows a direct determination of the superfluid fraction.
description: 4 pages, 2 figures
Abelian Fibrations, String Junctions, and Flux/Geometry Duality
Creators: name: Donagi, Ron
name: Gao, Peng
name: Schulz, Michael B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In previous work, it was argued that the type IIB T^6/Z_2 orientifold with a choice of flux preserving N=2 supersymmetry is dual to a class of purely geometric type IIA compactifications on abelian surface (T^4) fibered Calabi-Yau threefolds. We provide two explicit constructions of the resulting Calabi-Yau duals. The first is a monodromy based description, analogous to F-theory encoding of Calabi-Yau geometry via 7-branes and string junctions, except for T^4 rather than T^2 fibers. The second is an explicit algebro-geometric construction in which the T^4 fibers arise as the Jacobian tori of a family of genus-2 curves. This improved description of the duality map will be a useful tool to extend our understanding of warped compactifications. We sketch applications to related work to define warped Kaluza-Klein reduction in toroidal orientifolds, and to check the modified rules for D-brane instanton zero mode counting due to the presence of flux and other D-branes. The nontrivial fundamental groups of the Calabi-Yau manifolds constructed also have potential applications to heterotic model building.
description: 76 pages, 17 figures; uses amslatex, graphicx, xypic
The distributions of dissolved and suspended vanadium in Saanich Inlet, British Columbia
Creators: name: Moody, Willson Bridges
Publisher: name: University of British Columbia
Year: 2010

description: This study investigated the distribution of dissolved and suspended vanadium in Saanich Inlet, British Columbia, and the possible effects of scavenging by hydrous manganese and iron oxides. Water samples were collected from September 1973 to July 1974 and were tested for salinity, temperature, dissolved oxygen, dissolved and suspended vanadium, suspended manganese and suspended iron. A technique involving ion exchange to isolate vanadium followed by a catalytic colorimetric determination was developed and applied to the dissolved and suspended vanadium analyses. The data showed that, during the fall of 1973 and again in July 1974, there were positive correlations between the suspended vanadium and suspended manganese distributions, suggesting that vanadium was being scavenged by the manganese oxides during these periods. No such correlation was found between the suspended vanadium and suspended iron distributions. The anoxic deep waters generally contained less dissolved vanadium than the oxygenated waters above sill depth. This deficiency in the deep waters may have been due to co-precipitation with ferrous sulphides or adsorption by detrital silicate or organic particles.
A holistic approach to carbon-enhanced metal-poor stars
Creators: name: Masseron, T.
name: Johnson, J. A.
name: Plez, B.
name: Van Eck, S.
name: Primas, F.
name: Goriely, S.
name: Jorissen, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: By considering the various CEMP subclasses separately, we try to derive, from the specific signatures imprinted on the abundances, parameters (such as metallicity, mass, temperature, and neutron source) characterizing AGB nucleosynthesis from the specific signatures imprinted on the abundances, and separate them from the impact of thermohaline mixing, first dredge-up, and dilution associated with the mass transfer from the companion.To put CEMP stars in a broad context, we collect abundances for about 180 stars of various metallicities, luminosity classes, and abundance patterns, from our own sample and from literature. First, we show that there are CEMP stars which share the properties of CEMP-s stars and CEMP-no stars (which we call CEMP-low-s stars). We also show that there is a strong correlation between Ba and C abundances in the s-only CEMP stars. This strongly points at the operation of the 13C neutron source in low-mass AGB stars. For the CEMP-rs stars (seemingly enriched with elements from both the s- and r-processes), the correlation of the N abundances with abundances of heavy elements from the 2nd and 3rd s-process peaks bears instead the signature of the 22Ne neutron source. Adding the fact that CEMP-rs stars exhibit O and Mg enhancements, we conclude that extremely hot conditions prevailed during the thermal pulses of the contaminating AGB stars. Finally, we argue that most CEMP-no stars (with no overabundances for the neutron-capture elements) are likely the extremely metal-poor counterparts of CEMP neutron-capture-rich stars. We also show that the C enhancement in CEMP-no stars declines with metallicity at extremely low metallicity ([Fe/H]~< -3.2). This trend is not predicted by any of the current AGB models.
description: 27 pages, 24 figures, accepted for publication in A&A
STROBE checklist for Five-alpha reductase inhibitors and risk of prostate cancer among men with benign prostatic hyperplasia: A historical cohort study using primary care data
Creators: name: Thakrar, Dixa
Publisher: name: figshare
Year: 2023
Subjects: Epidemiology not elsewhere classified

description: STROBE checklist for Five-alpha reductase inhibitors and risk of prostate cancer among men with benign prostatic hyperplasia: A historical cohort study using primary care data
MAKTAB TA'LIMI TIZIMI BOSHQARUVIDA MARKETING XIZMATLARI FAOLIYATINING TAHLILI
Creators: name: Маманазарова, Наргиза
Publisher: name: Zenodo
Year: 2023

description: ushbu maqolada umumiy o‘rta ta’lim maktablari bilan o‘tkazilgan intervyu va so‘rovnoma zamonaviy ijtimoiy-iqtisodiy sharoitlarda maktabni rivojlantirish bilan bog’liq bo‘lgan boshqaruvdagi mavjud masalalar muhokama qilindi, maktab ta’limi tizimi boshqaruvida marketing xizmatlarini tashkil etish, rivojlantirish uchun ta'lim muassasa rahbarlarining bilim, ko‘nikma va malakalari tahlil qilindi.
FinRL: Deep Reinforcement Learning Framework to Automate Trading in Quantitative Finance
Creators: name: Liu, Xiao-Yang
name: Yang, Hongyang
name: Gao, Jiechao
name: Wang, Christina Dan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Machine Learning (cs.LG)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Deep reinforcement learning (DRL) has been envisioned to have a competitive edge in quantitative finance. However, there is a steep development curve for quantitative traders to obtain an agent that automatically positions to win in the market, namely \textit{to decide where to trade, at what price} and \textit{what quantity}, due to the error-prone programming and arduous debugging. In this paper, we present the first open-source framework \textit{FinRL} as a full pipeline to help quantitative traders overcome the steep learning curve. FinRL is featured with simplicity, applicability and extensibility under the key principles, \textit{full-stack framework, customization, reproducibility} and \textit{hands-on tutoring}. Embodied as a three-layer architecture with modular structures, FinRL implements fine-tuned state-of-the-art DRL algorithms and common reward functions, while alleviating the debugging workloads. Thus, we help users pipeline the strategy design at a high turnover rate. At multiple levels of time granularity, FinRL simulates various markets as training environments using historical data and live trading APIs. Being highly extensible, FinRL reserves a set of user-import interfaces and incorporates trading constraints such as market friction, market liquidity and investor's risk-aversion. Moreover, serving as practitioners' stepping stones, typical trading tasks are provided as step-by-step tutorials, e.g., stock trading, portfolio allocation, cryptocurrency trading, etc.
description: ACM International Conference on AI in Finance
สเปกโทรโฟโตเมตรีเชิงอนุพันธ์ในงานเภสัชวิเคราะห์Derivative spectrophotometry in pharmaceutical analysis
Creators: name: ลาวัลย์ ศรีพงษ์
Publisher: name: คณะเภสัชศาสตร์ ม.ศิลปากร /โรงพิมพ์ ม.ศิลปากร
Year: 2552
Subjects: สเปกโทรโฟโตเมตรี, สเปกโทรโฟโตเมตรีเชิงอนุพันธ์, งานเภสัชวิเคราะห์

description: 3( Jan-Dec), 2552, ไทยไภษัชยนิพนธ์
Unexpected impact of D waves in low-energy neutral pion photoproduction from the proton and the extraction of multipoles
Creators: name: Fernandez-Ramirez, C.
name: Bernstein, A. M.
name: Donnelly, T. W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Contributions of $D$ waves to physical observables for neutral pion photoproduction from the proton in the near-threshold region are studied and means to isolate them are proposed. Various approaches to describe the multipoles are employed --a phenomenological one, a unitary one, and heavy baryon chiral perturbation theory. The results of these approaches are compared and found to yield essentially the same answers. $D$ waves are seen to enter together with $S$ waves in a way that any means which attempt to obtain the $E_{0+}$ multipole accurately must rely on knowledge of $D$ waves and that consequently the latter cannot be dismissed in analyses of low-energy pion photoproduction. It is shown that $D$ waves have a significant impact on double-polarization observables that can be measured. This importance of $D$ waves is due to the soft nature of the $S$ wave and is a direct consequence of chiral symmetry and the Nambu--Goldstone nature of the pion. $F$-wave contributions are shown to be negligible in the near-threshold region.
description: 38 pages, 13 figures, 19 tables. Version to be published in Physical Review C
เภสัชกรรมปฐมภูมิ PRIMARY PHARMACEUTICAL SERVICE
Creators: name: ระพีพรรณ ฉลองสุข
name: สุรสิทธิ์ ล้อจิตรอำนวย
name: น้ำฝน ศรีบัณฑิต และ ภานุพัฒน์ พุ่มพฤกษ์
Publisher: name: คณะเภสัชศาสตร์ /โรงพิมพ์ ม.ศิลปากร
Year: 2013
Subjects: เภสัชกรรมปฐมภูมิ, งานเภสัชกรรมสังคม, งานบริการเภสัชสาธารณสุข,primary pharmaceutical service, social pharmaceutical service, pharmaceutical public health service

description: 2 (July-Dec 2013 ), 8, ไทยไภษัชยนิพนธ์ Thai Bulletin of   Pharmaceutical Science (TBPS)
On the nature of the single eclipse per 80d orbit of the H-rich luminous WN star WR22
Creators: name: Lenoir-Craig, Guillaume
name: Antokhin, Igor I.
name: Antokhina, Eleonora A.
name: St-Louis, Nicole
name: Moffat, Anthony F. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: WR22 = HD 92740 is a bright (V = 6.4 $mag$), intrinsically luminous, double-line WN7h + O9III-V binary exhibiting one sharp 8\% deep eclipse near periastron in its elliptical (e = 0.6) 80-day orbit, when the WR-star passes in front of the O star, with no secondary eclipse. We apply two models (L96, A13) to probe the optical space-based light curves from {\em BRITE-Constellation}, including three separate, complete eclipses, that show increased (o-c) scatter compared to the rest of the observations outside the eclipses, likely due to O-star light encountering WR wind-clumps. L96 is a simple atmospheric-eclipse model, often applied to close WR+O binaries, where the O-star is considered a point-source. A13 considers a finite-disk O-star and allows for atmospheric, photospheric and reflection components to the eclipse, permitting a better characterization of its shape through a more physically realistic description of the structures for both stars in WR22. Nevertheless, A13 is still susceptible to uncertainties in the luminosity of the O-star before unique values for the orbital inclination and WR mass-loss rate can be estimated. We present solutions for the two extremes of the O-star, O9V and O9III. As photometry alone cannot allow us to discriminate between these, we compared our results to the spectral models found in the literature and determined the correct solution to be O9V. Our best-fit A13 Model 1 gives $i = 83.5 \pm 0.4^{\circ}$, with $\dot M_{\rm WR} = (1.86 \pm 0.2) \times 10^{-5} \dot M_{\odot}/yr$. The flux ratio in the red {\em BRITE} band in this model is $F_{\rm O}/F_{\rm WR} = 0.064\pm 0.002$.
description: 15 pages, 11 figures
The "Logistical Machine" Reshaping Cultures and Landscapes: A Position Paper
Creators: name: IJMVSC
Publisher: name: Zenodo
Year: 2025

description: This position paper examines the role of the “logistical machine” as a driving force behind theacceleration of global flows and the homogenization of economies and cultures. Far from being merely anoptimization tool, the “logistical machine” enables the intensive exploitation of natural resources, theerosion of local knowledge, and the dominance of multinational corporations over territories and ways oflife. A critical assessment of global supply chains reveals how they concentrate economic power whiledismantling local alternatives. The author advocates for expanding traditional supply chain managementparadigms, which are often narrowly focused on performance and profitability while overlooking broadersystemic effects. Exploring alternatives such as short supply chains and localized governance models, thisposition paper opens new pathways for rethinking the “logistical machine” through the lenses of socialjustice and sustainability.
Cold atoms at unitarity and inverse square interaction
Creators: name: Bhaduri, R. K.
name: Murthy, M. V. N.
name: Srivastava, M. K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Consider two identical atoms in a spherical harmonic oscillator interacting with a zero-range interaction which is tuned to produce an s-wave zero-energy bound state. The quantum spectrum of the system is known to be exactly solvable. We note that the same partial wave quantum spectrum is obtained by the one-dimensional scale-invariant inverse square potential. Long known as the Calogero-Sutherland-Moser (CSM) model, it leads to Fractional Exclusion Statistics (FES) of Haldane and Wu. The statistical parameter is deduced from the analytically calculated second virial coefficient. When FES is applied to a Fermi gas at unitarity, it gives good agreement with experimental data without the use of any free parameter.
description: 11 pages, 3 figures, To appear in J. Phys. B. Atomic, Molecular and Optical Physics
MPEC 2024-S165 : 2024 SR4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SR4

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.
Blind Calibration of Air Quality Wireless Sensor Networks Using Deep Neural Networks
Creators: name: Veiga, Tiago
name: Ljunggren, Erling
name: Bach, Kerstin
name: Akselsen, Sigmund
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: I.6.4; I.6.5; I.6.3
subject: 68T07

description: Temporal drift of low-cost sensors is crucial for the applicability of wireless sensor networks (WSN) to measure highly local phenomenon such as air quality. The emergence of wireless sensor networks in locations without available reference data makes calibrating such networks without the aid of true values a key area of research. While deep learning (DL) has proved successful on numerous other tasks, it is under-researched in the context of blind WSN calibration, particularly in scenarios with networks that mix static and mobile sensors. In this paper we investigate the use of DL architectures for such scenarios, including the effects of weather in both drifting and sensor measurement. New models are proposed and compared against a baseline, based on a previous proposed model and extended to include mobile sensors and weather data. Also, a procedure for generating simulated air quality data is presented, including the emission, dispersion and measurement of the two most common particulate matter pollutants: PM 2.5 and PM 10 . Results show that our models reduce the calibration error with an order of magnitude compared to the baseline, showing that DL is a suitable method for WSN calibration and that these networks can be remotely calibrated with minimal cost for the deployer.
Dynamics and modulation of ring dark soliton in 2D Bose-Einstein condensates with tunable interaction
Creators: name: Hu, Xing-Hua
name: Zhang, Xiao-Fei
name: Zhao, Dun
name: Luo, Hong-Gang
name: Liu, W. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the dynamics and modulation of ring dark soliton in 2D Bose-Einstein condensates with tunable interaction both analytically and numerically. The analytic solutions of ring dark soliton are derived by using a new transformation method. For shallow ring dark soliton, it is stable when the ring is slightly distorted, while for large deformation of the ring, vortex pairs appear and they demonstrate novel dynamical behaviors: the vortex pairs will transform into dark lumplike solitons and revert to ring dark soliton periodically. Moreover, our results show that the dynamical evolution of the ring dark soliton can be dramatically affected by Feshbach resonance, and the lifetime of the ring dark soliton can be largely extended which offers a useful method for observing the ring dark soliton in future experiments.
description: 6 pages, 4 figures
Design of a Scalable 4G Portable Network Using Low Cost SDR And Raspberry Pi
Creators: name: Choudhury, Nupur
name: Kalita, Chinmoy
name: Sarma, Kandarpa Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Of late, Software Defined Radio (SDR) approach has become an effective means to design high data rate wireless systems for a range of applications. There are methods with which low cost SDR based 4th generation (4G) or long term evolution (LTE) systems can be designed. Using low cost Raspberry Pi systems, the SDR aided 4G systems can be designed for high data rate communication. The work is related to the design of a 4G wireless system using low cost SDR solutions and integrated to a programmable controller based on a Raspberry Pi. Experimental results show that the system is effective in a range of conditions.
Supplementary figure S1-S11 captions from LIM-HD transcription factors control axial patterning and specify distinct neuronal and intestinal cell identities in planarians
Creators: name: Molina, M. Dolores
name: Abduljabbar, Dema
name: Guixeras, Anna
name: Fraguas, Susanna
name: Cebrià, Francesc
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310404
subject: Evolution of developmental systems
classificationCode: 3105
subject: Genetics
subject: FOS: Biological sciences
classificationCode: 310803
subject: Plant cell and molecular biology
classificationCode: 310902
subject: Animal cell and molecular biology

description: Adult planarians can regenerate the gut, eyes and even a functional brain. Proper identity and patterning of the newly formed structures require signals that guide and commit their adult stem cells. During embryogenesis, LIM-Homeodomain (LIM-HD) transcription factors act in a combinatorial ‘LIM code’ to control cell fate determination and differentiation. However, our understanding about the role these genes play during regeneration and homeostasis is limited. Here, we report the full repertoire of LIM-HD genes in Schmidtea mediterranea. We found that lim homeobox genes (lhx) appear expressed in complementary patterns along the cephalic ganglia and digestive system of the planarian, with some of them being co-expressed in the same cell types. We have identified that Smed-islet1, -lhx1/5-1, -lhx2/9-3, -lhx6/8, -lmx1a/b-2 and -lmx1a/b-3 are essential to pattern and size the planarian brain as well as for correct regeneration of specific subpopulations of dopaminergic, serotonergic, GABAergic and cholinergic neurons, while Smed-lhx1/5.2 and -lhx2/9.2 are required for the proper expression of intestinal cell type markers, specifically the goblet subtype. LIM-HD are also involved in controlling axonal pathfinding (lhx6/8), axial patterning (islet1, lhx1/5-1, lmx1a/b-3), head/body proportions (islet2) and stem cell proliferation (lhx3/4, lhx2/9-3, lmx1a/b-2, lmx1a/b-3). Altogether, our results suggest that planarians might present a combinatorial LIM code that controls axial patterning, axonal growing and specify distinct neuronal and intestinal cell identities.
The Quasar SDSS J105041.35+345631.3: Black Hole Recoil or Extreme Double-Peaked Emitter?
Creators: name: Shields, G. A.
name: Rosario, D. J.
name: Smith, K. L.
name: Bonning, E. W.
name: Salviander, S.
name: Kalirai, J. S.
name: Strickler, R.
name: Ramirez-Ruiz, E.
name: Dutton, A. A.
name: Treu, T.
name: Marshall, P. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The quasar SDSS J105041.35+345631.3 (z = 0.272) has broad emission lines blueshifted by 3500 km/s relative to the narrow lines and the host galaxy. Such an object may be a candidate for a recoiling supermassive black hole, binary black hole, a superposition of two objects, or an unusual geometry for the broad emission-line region. The absence of narrow lines at the broad line redshift argues against superposition. New Keck spectra of J1050+3546 place tight constraints on the binary model. The combination of large velocity shift and symmetrical H-beta profile, as well as aspects of the narrow line spectrum, make J1050+3546 an interesting candidate for black hole recoil. Other aspects of the spectrum, however, suggest that the object is most likely an extreme case of a ``double-peaked emitter.'' We discuss possible observational tests to determine the true nature of this exceptional object.
description: 5 pages, 2 figures, LaTeX; substantial revisions
Fermi observations of TeV-selected AGN
Creators: name: Fegan, S. J.
name: Sanchez, D.
name: Collaboration, Fermi LAT
name: :
name: Abdo, A. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report on observations of TeV-selected AGN made during the first 5.5 months of observations with the Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope (Fermi). In total, 96 AGN were selected for study, each being either (i) a source detected at TeV energies (28 sources) or (ii) an object that has been studied with TeV instruments and for which an upper-limit has been reported (68 objects). The Fermi observations show clear detections of 38 of these TeV-selected objects, of which 21 are joint GeV-TeV sources and 29 were not in the third EGRET catalog. For each of the 38 Fermi-detected sources, spectra and light curves are presented. Most can be described with a power law of spectral index harder than 2.0, with a spectral break generally required to accommodate the TeV measurements. Based on an extrapolation of the Fermi spectrum, we identify sources, not previously detected at TeV energies, which are promising targets for TeV instruments. Evidence for systematic evolution of the $γ$-ray spectrum with redshift is presented and discussed in the context of interaction with the EBL.
description: 51 pages, 6 figures, accepted for The Astronomical Journal
1Gyr in the Life of the Globular Cluster NGC 6397
Creators: name: Heggie, Douglas C.
name: Giersz, Mirek
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: M4 and NGC 6397 are two very similar galactic globular clusters, which differ mainly in their surface brightness profile. M4 has a classic King-like profile, whereas NGC 6397 has a more concentrated profile, which is often interpreted as that of a post-core collapse cluster. Heggie & Giersz (2008), however, found that M4 is also a post-core collapse cluster, and Giersz & Heggie (2009) concluded that the main reason for the difference between the two surface brightness profiles is fluctuations. This conclusion was reached on the basis of Monte Carlo models, however, and in the present Letter we verify that similar fluctuations occur in N-body models. The models were initialised by generating initial conditions from the Monte Carlo model of NGC 6397 at the simulated age of 12Gyr, and one was followed for 1Gyr. The new models help to clarify the nature of the fluctuations, which have the nature of semi-regular oscillations with a time scale of order 10^8yr. They are influenced by the dynamical role which is played by primordial binaries in the evolution of the core.
description: 5 pages, 7 figures, to appear in MNRAS Letters
Probing the origin of 4FGL J0822.8-4207: cosmic ray illumination from the SNR Puppis A and the Herbig-Haro object HH219
Creators: name: Araya, Miguel
name: Gutiérrez, Luis
name: Kerby, Stephen
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: 4FGL J0822.8-4207 is a point source found in the 4FGL-DR2 catalog by the gamma-ray observatory Fermi-LAT and has no known association. We carry out X-ray observations of 4FGL J0822.8-4207 to help understand its nature. We explore two scenarios for the origin of 4FGL J0822.8-4207. In the first case we study the possibility that cosmic rays from the supernova remnant (SNR) Puppis A, seen nearby in the sky, reach the dense gas at the location of the source and produce the gamma-rays through inelastic proton-proton collisions. We apply a standard model for particle diffusion in the interstellar medium and derive the required physical parameters. We find that this scenario for the gamma rays is possible if the gas is located at a distance that is not higher than ~40 pc from Puppis A, unless the SNR is older than 7 kyr or the diffusion coefficient is higher than typical Galactic values, and relatively low-energy cosmic rays are currently escaping from the SNR. In the second scenario, we consider the protostellar jet HH219 as the origin of the GeV source and find the very interesting possibility that particles could be accelerated up to energies of at least several TeV in HH219. This would make this system the first known of its kind to produce gamma-ray emission extending up to hundreds of GeV without any apparent cutoff and an excellent laboratory to study the process of particle acceleration.
description: Accepted for publication in MNRAS. 10 pages, 3 figures. Comments welcome
Exploring smoking-gun signals of the Schwinger mechanism in QCD
Creators: name: Aguilar, A. C.
name: Ferreira, M. N.
name: Papavassiliou, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In QCD, the Schwinger mechanism endows the gluons with an effective mass through the dynamical formation of massless bound-state poles that are longitudinally coupled. The presence of these poles affects profoundly the infrared properties of the interaction vertices, inducing crucial modifications to their fundamental Ward identities. Within this general framework, we present a detailed derivation of the non-Abelian Ward identity obeyed by the pole-free part of the three-gluon vertex in the soft-gluon limit, and determine the smoking-gun displacement that the onset of the Schwinger mechanism produces to the standard result. Quite importantly, the quantity that describes this distinctive feature coincides formally with the bound-state wave function that controls the massless pole formation. Consequently, this signal may be computed in two independent ways: by solving an approximate version of the pertinent Bethe-Salpeter integral equation, or by appropriately combining the elements that enter in the aforementioned Ward identity. For the implementation of both methods we employ two- and three-point correlation functions obtained from recent lattice simulations, and a partial derivative of the ghost-gluon kernel, which is computed from the corresponding Schwinger-Dyson equation. Our analysis reveals an excellent coincidence between the results obtained through either method, providing a highly nontrivial self-consistency check for the entire approach. When compared to the null hypothesis, where the Schwinger mechanism is assumed to be inactive, the statistical significance of the resulting signal is estimated to be three standard deviations.
description: 44 pages, 12 figures
Solar Oscillations
Creators: name: Kosovichev, A. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In recent years solar oscillations have been studied in great detail, both observationally and theoretically; so, perhaps, the Sun currently is the best understood pulsating star. The observational studies include long, almost uninterrupted series of oscillation data from the SOHO spacecraft and ground-based networks, GONG and BiSON, and more recently, extremely high-resolution observations from the Hinode mission. These observational data cover the whole oscillation spectrum, and have been extensively used for helioseismology studies, providing frequencies and travel times for diagnostics of the internal stratification, differential rotation, zonal and meridional flows, subsurface convection and sunspots. Together with realistic numerical simulations they lead to better understanding of the excitation mechanism and interactions of the oscillations with turbulence and magnetic fields. However, many problems remain unsolved. In particular, the precision of the helioseismology measurements is still insufficient for detecting the dynamo zone and deep routes of sunspots. Our knowledge of the oscillation physics in strong magnetic field regions is inadequate for interpretation of MHD waves in sunspots and for sunspot seismology. A new significant progress in studying the solar oscillations is expected from the Solar Dynamics Observatory scheduled for launch in 2010.
description: 13 pages, 12 figures, Conf. Stellar Pulsation: Challenges for Theory and Observation, Santa Fe, May 31 - June 5, 2009
Properties of gravitoturbulent accretion disks
Creators: name: Rafikov, Roman R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We explore the properties of cold gravitoturbulent accretion disks - non-fragmenting disks hovering on the verge of gravitational instability - using a realistic prescription for the effective viscosity caused by gravitational torques. This prescription is based on a direct relationship between the angular momentum transport in a thin accretion disk and the disk cooling in a steady state. Assuming that opacity is dominated by dust we are able to self-consistently derive disk properties for a given $\dot M$ assuming marginal gravitational stability. We also allow external irradiation of the disk and account for a non-zero background viscosity which can be due to the MRI. Spatial transitions between different co-existing disk states (e.g. between irradiated and self-luminous or between gravitoturbulent and viscous) are described and the location of the boundary at which disk must fragment is determined in a variety of situations. We demonstrate in particular that at low enough $\dot M$ external irradiation stabilizes gravitoturbulent disk against fragmentation all the way to infinity thus providing means of steady mass transport to the central object. Implications of our results for the possibility of planet formation by gravitational instability in protoplanetary disks and star formation in the Galactic Center and for the problem of feeding supermassive black holes in galactic nuclei are discussed.
description: 12 pages, 3 figures, submitted to ApJ
Substructure depletion in the Milky Way halo by the disk
Creators: name: D'Onghia, Elena
name: Springel, Volker
name: Hernquist, Lars
name: Keres, Dusan
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We employ numerical simulations and simple analytical estimates to argue that dark matter substructures orbiting in the inner regions of the Galaxy can be efficiently destroyed by disk shocking, a dynamical process known to affect globular star clusters. We carry out a set of fiducial high-resolution collisionless simulations in which we adiabatically grow a disk, allowing us to examine the impact of the disk on the substructure abundance. We also track the orbits of dark matter satellites in the high-resolution Aquarius simulations and analytically estimate the cumulative halo and disk shocking effect. Our calculations indicate that the presence of a disk with only 10% of the total Milky Way mass can significantly alter the mass function of substructures in the inner parts of halos. This has important implications especially for the relatively small number of satellites seen within ~30 kpc of the Milky Way center, where disk shocking is expected to reduce the substructure abundance by a factor of ~2 at 10^9 M$_{\odot}$ and ~3 at 10^7 M$_{\odot}$. The most massive subhalos with 10^10 M$_{\odot}$ survive even in the presence of the disk. This suggests that there is no inner missing satellite problem, and calls into question whether these substructures can produce transient features in disks, like multi-armed spiral patterns. Also, the depletion of dark matter substructures through shocking on the baryonic structures of the disk and central bulge may aggravate the problem to fully account for the observed flux anomalies in gravitational lens systems, and significantly reduces the dark matter annihilation signal expected from nearby substructures in the inner halo.
description: 10 pages, 9 figures, minor corrections, accepted by ApJ
Neuronal synchrony during anaesthesia - A thalamocortical model
Creators: name: Sheeba, Jane H.
name: Stefanovska, Aneta
name: McClintock, Peter V. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: There is growing evidence in favour of the temporal-coding hypothesis that temporal correlation of neuronal discharges may serve to bind distributed neuronal activity into unique representations and, in particular, that $θ$ (3.5-7.5 Hz) and $δ$ ($0.5
description: 18 pages, 3 figures
Fast electron generation by Coulomb scattering on spatially correlated ions in a strong laser field
Creators: name: Bauch, S.
name: Bonitz, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Electrons colliding with spatially fixed ions in strong laser fields are investigated by solving the time-dependent Schrödinger equation. Considering first simple one-dimensional model systems, the mechanisms and energy spectra of fast electrons are analyzed, starting from collisions on a single ion. By using these electrons as projectiles for a second and third collision, the maximum possible energy obtained can be significantly increased. We then generalize the analysis to 2D systems where additional angular degrees of freedom lead to a drastic loss of efficiency. This problem can be overcome by introducing external confinements, which allow to focus the electrons and increase the intensity of high-energy electrons.
"Tu vida en dos maletas": Un análisis del proceso identitario de migrantes
Creators: name: Terán-Tinedo, Valeria
Publisher: name: Zenodo
Year: 2025

description: El presente póster resume un estudio que utiliza un enfoque narrativo para analizar el proceso identitario de dos mujeres migrantes. Concretamente, se centró en el simbolismo detrás de los objetos empacados en la maleta, se identificaron los obstáculos institucionales ligados a los estatus migratorios y los apoyos que facilitan el afrontamiento al proceso migratorio y, finalmente, se analizó la continuidad y discontinuidad de elementos del self presente en sus relatos. Los resultados muestran cómo los objetos seleccionados forman parte de la dinámica de la construcción identitaria. Asimismo, se observa que las redes de apoyo favorecen la continuidad del self, mientras que los obstáculos institucionales favorecen la discontinuidad. Finalmente, se pone de manifiesto la relevancia del estatus migratorio en la reconstrucción identitaria de las migrantes.
Chaotic dynamics of a suspended string in a gravitational background with magnetic field
Creators: name: Colangelo, Pietro
name: Giannuzzi, Floriana
name: Losacco, Nicola
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the effects of a magnetic field on the chaotic dynamics of a string with endpoints on the boundary of an asymptotically AdS$_5$ space with black hole. We study Poincaré sections and compute the Lyapunov exponents for the string perturbed from the static configuration, for two different orientations, with position of the endpoints on the boundary orthogonal and parallel to the magnetic field. We find that the magnetic field stabilizes the string dynamics, with the largest Lyapunov exponent remaining below the Maldacena-Shenker-Stanford bound.
description: 19 pages, 13 figures, 2 tables
Carbon stars in the large magellanic cloud
Creators: name: Crabtree, Dennis Richard
Publisher: name: University of British Columbia
Year: 2010

description: A catalogue of cool carbon stars in the Large Magellanic Cloud is presented along with photometric and spectroscopic observations of some of the members. Image tube spectra at a dispersion of 117 A/mm were obtained for seven of the stars in order to investigate some of the grosser features of the spectrum. In addition photometric observations on the VRI system of forty stars have been made. The spectra indicate that three of the carbon stars observed show enhancement of spectral features involving the ¹³C isotope. Using the photometric observations to place the stars in a theoretical Hertzsprung-Hussell diagram, it is concluded that (1) all forty stars are in the double-shell source phase of evolution and, (2) the helium shell flashes are responsible for the formation of the majority of cool N-type carbon stars.
Lorentz-violating effects on topological defects generated by two real scalar fields
Creators: name: Bazeia, D.
name: Ferreira, M. M.
name: Gomes, A. R.
name: Menezes, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The influence of a Lorentz-violation on soliton solutions generated by a system of two coupled scalar fields is investigated. Lorentz violation is induced by a fixed tensor coefficient that couples the two fields. The Bogomol'nyi method is applied and first-order differential equations are obtained whose solutions minimize energy and are also solutions of the equations of motion. The analysis of the solutions in phase space shows how the stability is modified with the Lorentz violation. It is shown explicitly that the solutions preserve linear stability despite the presence of Lorentz violation. Considering Lorentz violation as a small perturbation, an analytical method is employed to yield analytical solutions.
description: (9 pages, 11 figures)