cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On 't Hooft's S-matrix Ansatz for quantum black holes
Creators: name: Arcioni, Giovanni
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The S-matrix Ansatz has been proposed by 't Hooft to overcome difficulties and apparent contradictions of standard quantum field theory close to the black hole horizon. In this paper we revisit and explore some of its aspects. We start by computing gravitational backreaction effects on the properties of the Hawking radiation and explain why a more powerful formalism is needed to encode them. We then use the map bulk-boundary fields to investigate the nature of exchange algebras satisfied by operators associated with ingoing and outgoing matter. We propose and comment on some analogies between the non covariant form of the S-matrix amplitude and liquid droplet physics to end up with similarities with string theory amplitudes via an electrostatic analogy. We finally recall the difficulties that one encounters when trying to incorporate non linear gravity effects in 't Hooft's S-matrix and observe how the inclusion of higher order derivatives might help in the black hole microstate counting.
description: 22 Pages. Latex File
A collaborative approach to preserving at-risk open access journals
Creators: name: Mitchell, Dominic
Publisher: name: Zenodo
Year: 2021
Subjects: DOAJ
CLOCKSS
Keepers Registry
PKP
Internet Archive
archiving
digital preservation

description: In the September 2020 preprint “Open is not forever”, (Laakso et al.) discuss the high number of Open Access journals that disappear from the web. It is a known problem in the digital preservation world that long-tail journals are especially at-risk of disappearing. Five leading parties are now collaborating to address this problem: the Directory of Open Access Journals (DOAJ), CLOCKSS, Internet Archive, the Public Knowledge Project Preservation Network (PKP PN), and International ISSN / Keepers Registry. Building from the existing DOAJ infrastructure, we are establishing a central hub where preservation agencies can harvest consistent metadata, and access full-text. Each of the preservation partners offers somewhat different solutions for publishers to preserve their content. The project will offer free and low-cost options for preservation and access. In the first phase, the target is diamond OA journals (those with no author processing charges), because these are the journals that are least likely to participate in a preservation service and hence are most at-risk of disappearing. The project is currently coordinating technical designs, service development, infrastructure, and sustainability planning.
Optimización en procesos para Linx Colombia
Creators: name: Beltrán Preciado, Daniela Alejandra
name: Gómez Guevara, Johanna Marcela
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Organización - Estructura
subject: Innovación tecnológica - Administración
subject: Mercadeo - Estudios de caso
subject: Centralización de clientes
subject: Optimización de procesos
subject: Ampliación de portafolio
subject: Aprovechamiento de redes sociales

description: La optimización de procesos en Linx Colombia tuvo como objetivo diagnosticar integralmente la empresa para identificar fortalezas y oportunidades, y así formular propuestas de mejora. Se analizo su historia, operaciones, gestión de clientes y presencia en redes sociales, complementando con herramientas como análisis PESTEL, DOFA, matriz competitiva y encuestas de satisfacción. El estudio reveló que Linx posee una sólida calidad en sus productos y una buena presencia en Instagram, lo que ha permitido un crecimiento sostenido. Las encuestas mostraron un alto nivel de satisfacción general, aunque se identificaron áreas de mejora, como la ampliación de la gama de colores. Se formularon recomendaciones basadas en estos hallazgos, incluyendo la implementación de un CRM para centralizar clientes, la expansión del catálogo de esmaltes semipermanentes y mejoras en el catálogo digital. Además, se sugiere un mejor uso de herramientas de redes sociales como Linktree en Instagram, con el objetivo de mejorar la eficiencia operativa y aumentar la competitividad de Linx en el mercado.
description: The process optimization at Linx Colombia aimed to comprehensively diagnose the company to identify strengths and opportunities, thereby formulating improvement proposals. The analysis covered its history, operations, customer management, and social media presence, and was complemented by tools such as PESTEL analysis, SWOT analysis, competitive matrix, and satisfaction surveys. The study revealed that Linx has solid product quality and a strong presence on Instagram, which has enabled sustained growth. The surveys indicated a high level of overall satisfaction, although areas for improvement were identified, such as expanding the range of colors. Recommendations based on these findings were formulated, including the implementation of a CRM to centralize customer management, the expansion of the semi-permanent nail polish catalog, and improvements in the digital catalog. Additionally, better use of social media tools like Linktree on Instagram is suggested to improve operational efficiency and increase Linx’s competitiveness in the market.
Nonlinear twistoptics at symmetry-broken interfaces
Creators: name: Yao, Kaiyuan
name: Finney, Nathan R.
name: Zhang, Jin
name: Moore, Samuel L.
name: Xian, Lede
name: Tancogne-Dejean, Nicolas
name: Liu, Fang
name: Ardelean, Jenny
name: Xu, Xinyi
name: Halbertal, Dorri
name: Watanabe, K.
name: Taniguchi, T.
name: Ochoa, Hector
name: Asenjo-Garcia, Ana
name: Zhu, Xiaoyang
name: Basov, D. N.
name: Rubio, Angel
name: Dean, Cory R.
name: Hone, James
name: Schuck, P. James
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Broken symmetries induce strong nonlinear optical responses in materials and at interfaces. Twist angle can give complete control over the presence or lack of inversion symmetry at a crystal interface, and is thus an appealing knob for tuning nonlinear optical systems. In contrast to conventional nonlinear crystals with rigid lattices, the weak interlayer coupling in van der Waals (vdW) heterostructures allows for arbitrary selection of twist angle, making nanomechanical manipulation of fundamental interfacial symmetry possible within a single device. Here we report highly tunable second harmonic generation (SHG) from nanomechanically rotatable stacks of bulk hexagonal boron nitride (BN) crystals, and introduce the term twistoptics to describe studies of optical properties in dynamically twistable vdW systems. We observe SHG intensity modulated by a factor of more than 50, polarization patterns determined by moiré interface symmetry, and enhanced conversion efficiency for bulk crystals by stacking multiple pieces of BN joined by symmetry-broken interfaces. Our study provides a foundation for compact twistoptics architectures aimed at efficient, scalable, and tunable frequency-conversion, and demonstrates SHG as a robust probe of buried vdW interfaces.
description: 23 Pages, 17 Figures
Die heutige Lage des Diatessaronproblems
Creators: name: Plooij, Daniel
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 23 Nr. 2 (1927): Oriens christianus, Band 23, Heft 2
Adiabatic Quantum Linear Regression
Creators: name: Date, Prasanna
name: Potok, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: I.2.6
subject: 62J05

description: A major challenge in machine learning is the computational expense of training these models. Model training can be viewed as a form of optimization used to fit a machine learning model to a set of data, which can take up significant amount of time on classical computers. Adiabatic quantum computers have been shown to excel at solving optimization problems, and therefore, we believe, present a promising alternative to improve machine learning training times. In this paper, we present an adiabatic quantum computing approach for training a linear regression model. In order to do this, we formulate the regression problem as a quadratic unconstrained binary optimization (QUBO) problem. We analyze our quantum approach theoretically, test it on the D-Wave 2000Q adiabatic quantum computer and compare its performance to a classical approach that uses the Scikit-learn library in Python. Our analysis shows that the quantum approach attains up to 2.8x speedup over the classical approach on larger datasets, and performs at par with the classical approach on the regression error metric.
Equivalence between vortices, twists and chiral gauge fields in Kitaev's honeycomb lattice model
Creators: name: Horner, Matthew D.
name: Farjami, Ashk
name: Pachos, Jiannis K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We demonstrate that $\mathbb{Z}_2$ gauge transformations and lattice deformations in Kitaev's honeycomb lattice model can have the same description in the continuum limit of the model in terms of chiral gauge fields. The chiral gauge fields are coupled to the Majorana fermions that satisfy the Dirac dispersion relation in the non-Abelian sector of the model. For particular values, the effective chiral gauge field becomes equivalent to the $\mathbb{Z}_2$ gauge field, enabling us to associate effective fluxes to lattice deformations. Motivated by this equivalence, we consider Majorana-bounding $π$ vortices and Majorana-bounding lattice twists and demonstrate that they are adiabatically connected to each other. This equivalence opens the possibility for novel encoding of Majorana-bounding defects that might be easier to realise in experiments.
description: 17 pages, 11 figures
Plan estratégico de marketing digital para un emprendimiento en el sector de juguetes en Bogotá
Creators: name: Melgarejo, Nicolás Marcelo
name: Castellanos Castillo, Daniel Andres
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Innovación tecnológica - Administración
subject: Organización - Estructura
subject: Mercadeo - Estudios de caso
subject: Marketing digital
subject: MIPYMES
subject: Estrategias de publicidad
subject: Gestión de datos del cliente
subject: Segmentación y personalización

description: Este trabajo presenta un plan estratégico de marketing digital para el Grupo K&C S.A.S, una MIPYME en Bogotá dedicada a la comercialización de juguetes. El objetivo es optimizar la adquisición y fidelización de clientes mediante la implementación de estrategias de marketing digital eficaces. A través de un análisis detallado de los activos digitales de la empresa y la identificación de áreas de mejora, se desarrollaron propuestas centradas en la gestión de datos del cliente, la estrategia de publicidad y marketing, la retención y conversión de clientes, y la segmentación y personalización. El plan incluye la implementación de un sistema CRM en Notion para mejorar la administración de datos, la creación de campañas publicitarias personalizadas, y el uso de metodologías ágiles como Scrum para la ejecución del plan. Las recomendaciones buscan no solo resolver los problemas actuales de la empresa, sino también proporcionar una base sólida para su crecimiento futuro en el competitivo mercado de juguetes en Bogotá.
description: This work presents a strategic digital marketing plan for Grupo K&C S.A.S, a small and medium-sized enterprise (SME) in Bogotá dedicated to the commercialization of toys. The objective is to optimize customer acquisition and retention through the implementation of effective digital marketing strategies. Through a detailed analysis of the company's digital assets and the identification of areas for improvement, proposals were developed focusing on customer data management, advertising and marketing strategy, customer retention and conversion, and segmentation and personalization. The plan includes the implementation of a CRM system in Notion to improve data management, the creation of personalized advertising campaigns, and the use of agile methodologies such as Scrum for the execution of the plan. The recommendations aim not only to address the company's current problems but also to provide a solid foundation for its future growth in the competitive toy market in Bogotá.
Additional file 2 of Evolving geographic diversity in SARS-CoV2 and in silico analysis of replicating enzyme 3CLpro targeting repurposed drug candidates
Creators: name: Chitranshi, Nitin
name: Gupta, Vivek K.
name: Rashi Rajput
name: Godinez, Angela
name: Kanishka Pushpitha
name: Shen, Ting
name: Mirzaei, Mehdi
name: Yuyi You
name: Devaraj Basavarajappa
name: Gupta, Veer
name: Graham, Stuart L.
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2: Table S2. SARS-CoV and SARS-CoV-2 sequence alignment of 3CLPro shares around 95% similarity.
Myotis muricola
Creators: name: Huang, Joe Chun-Chia
name: Jazdzyk, Elly Lestari
name: Nusalawo, Meyner
name: Maryanto, Ibnu
name: Maharadatunkamsi
name: Wiantoro, Sigit
name: Kingston, Tigga
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis
Myotis muricola

description: Myotis muricola (Gray, 1846)
Nepalese whiskered myotis
 New records
Lampung Province: Kuyung Arang Village, Pemerihan Village, Sukabanjar Village, Sukaraja Forest, Sumber Rejo Village.
 New material
Two bats were collected as voucher specimens. Lampung Province: Sumber Rejo Village, 1♂ 1♀ (MZB 34968, 34969).
 Previous records from Sumatra
 Lampung Province: Kalianda (van Strien, 1996); Jambi Province: Jambi (Wiantoro et al., 2012).
 Remarks
 This was the most common Myotis species in our study area. It is a small brown bat with wing membrane attached at the base of the toes. Most individuals were captured with mist nets and harp traps between 50 to 600 m a.s.l. in coffee plantations. A few individuals were captured in the understory in the Sukaraja Forest and one individual was trapped around two meters above the Way Pemerihan River.
description: Published as part of Huang, Joe Chun-Chia, Jazdzyk, Elly Lestari, Nusalawo, Meyner, Maryanto, Ibnu, Maharadatunkamsi, Wiantoro, Sigit & Kingston, Tigga, 2014, A recent bat survey reveals Bukit Barisan Selatan Landscape as a chiropteran diversity hotspot in Sumatra, pp. 413-449 in Acta Chiropterologica 16 (2) on page 435, DOI: 10.3161/150811014X687369, http://zenodo.org/record/3943617
Minimal polynomials and annihilators of generalized Verma modules of the scalar type
Creators: name: Oda, Hiroshi
name: Oshima, Toshio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 22E47; 16S30

description: Let g be a complex reductive Lie algebra and U(g) the universal enveloping algebra of g. Associated to a faithful irreducible finite dimensional representation of g, a square matrix F with entries in U(g) naturally arises and if we consider the entries of F are elements in End(M) of a given U(g)-module M, the minimal polynomial of F is defined as the usual one for an associative algebra over the complex field. Suppose M is a generalized Verma module induced from a character of a parabolic subalgebra of g. In this paper a polynomial q(x) with the parameter of the character is constructed, which equals the minimal polynomial for the generic parameter. Then the two-sided ideal of U(g) generated by the entries of q(F) is studied. We give a sufficient condition for the parameter such that the ideal describes the difference of two left ideals related to M and the corresponding Verma module. The result has many applications. For example we can explicitly give a generator system of the annihilator of M for the generic parameter. This paper also deals with many concrete examples.
description: 57 pages. v2: Accepted for publication in J. Lie Theory. Some details are changed to increase accessibility
Dark Matter and Dark Energy from a single scalar field and CMB data
Creators: name: Mainini, Roberto
name: Colombo, Loris P. L.
name: Bonometto, Silvio A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Axions are likely to be the Dark Matter (DM) that cosmological data require. They arise in the Peccei Quinn solution of the strong CP problem. In a previous work we showed that their model has a simple and natural generalization which yields also Dark Energy (DE), in fair proportions, without tuning any parameter: DM and DE arise from a single scalar field and are weakly coupled in the present era. In this paper we extend the analysis of this dual-axion cosmology and fit it to WMAP data, by using a Markov chain technique. We find that LCDM, dynamical DE with a SUGRA potential, DE with a SUGRA potential and a constant DE-DM coupling, as well as the dual-axion model with a SUGRA potential, fit data with a similar accuracy. The best-fit parameters are however fairly different, although consistency is mostly recovered at the 2-sigma level. A peculiarity of the dual-axion model with SUGRA potential is to cause more stringent constraints on most parameters and to favor high values of the Hubble parameter.
description: 34 pages, 15 figures, replaced with accepted version
Formation energy puzzle in intermetallic alloys: Random phase approximation fails to predict accurate formation energies
Creators: name: Nepal, Niraj K.
name: Adhikari, Santosh
name: Neupane, Bimal
name: Ruzsinszky, Adrienn
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We performed density functional calculations to estimate the formation energies of intermetallic alloys. We used two semilocal approximations, the generalized gradient approximation (GGA) by Perdew-Burke-Ernzerhof (PBE) and the strongly constrained and appropriately normed (SCAN) meta-GGA. In addition, we utilized two nonlocal DFT functionals, the hybrid HSE06, and the state-of-the-art random phase approximation (RPA). The nonlocal functionals such as HSE06 and RPA yield accurate formation energies of binary alloys with completely-filled d-band metals, where semilocal functionals underperform. The accuracy at the nonlocal functionals is greatly reduced when a partially-filled d-band metal is present in an alloy, while PBE-GGA outperforms in these cases. We show that the accurate prediction of formation energies by any DFT method depends on its ability to predict the accurate electronic properties, e.g., valence d-band contribution to the density of states (DOS). The SCAN meta-GGA often corrects the PBE-DOS, however, it does not provide accurate formation energies compared to PBE. This is assumed to be due to the lack of proper error cancellation that should be expected due to the similar bulk nature of both alloys and their constituents, which may improve with the modification of meta-GGA ingredients. RPA yields too negative formation energies of alloys with partially-filled d-band metals. RPA results can be corrected by restoring the exchange-correlation kernel, thereby improving the short-range electron-electron correlation in metallic densities.
Additional file 1 of Complex I reductions in the nucleus basalis of Meynert in Lewy body dementia: the role of Lewy bodies
Creators: name: Hatton, Christopher
name: Reeve, Amy
name: Lax, Nichola Zoe
name: Blain, Alasdair
name: Ng, Yi Shiau
name: El-Agnaf, Omar
name: Attems, Johannes
name: John-Paul Taylor
name: Turnbull, Doug
name: Erskine, Daniel
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology

description: Additional file 1: Supplementary Figure 1. ChAT expression is elevated in iLBD and porin is increased in iLBD and LBD. Supplementary Figure 2. Merged images of respiratory chain subunits demonstrate co-localisation of mitochondrial markers within ChAT-immunoreactive neurons. Supplementary Figure 3. Complex I and IV expression relative to porin in individual LBD cases are demonstrated relative to control and iLBD cases. Supplementary Figure 4. Data across individual LBD cases demonstrated highly variable patterns of deficiency across cases. Supplementary Figure 5. Scatterplot demonstrating the relationship between total number of ChAT+ neurons per case and percentage of cells with Complex I expression <1 standard deviation between the control group mean. Supplementary Figure 6. When NDUFB8 relative to porin was plotted across individual cells per LBD case we observed a general trend of cells with no α-synuclein having lower levels compared to cells with Lewy bodies. Supplementary Figure 7. Lewy body bearing neurons had higher levels of NDUFB8 relative to porin when the area occupied by the Lewy body was removed from the analysis. Supplementary Figure 8. Correlational analyses of percentage area occupied by α-synuclein and respiratory chain deficiencies. Supplementary Figure 9. Correlational analysis of cell count and percentage of cells bearing Lewy bodies.
Time-Dependent Density Functional Theory with Ultrasoft Pseudopotential: Real-Time Electron Propagation across Molecular Junction
Creators: name: Qian, Xiaofeng
name: Li, Ju
name: Lin, Xi
name: Yip, Sidney
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A practical computational scheme based on time-dependent density functional theory (TDDFT) and ultrasoft pseudopotential (USPP) is developed to study electron dynamics in real time. A modified Crank-Nicolson time-stepping algorithm is adopted, under planewave basis. The scheme is validated by calculating the optical absorption spectra for sodium dimer and benzene molecule. As an application of this USPP-TDDFT formalism, we compute the time evolution of a test electron packet at the Fermi energy of the left metallic lead crossing a benzene-(1,4)-dithiolate junction. A transmission probability of 5-7%, corresponding to a conductance of 4.0-5.6muS, is obtained. These results are consistent with complex band structure estimates, and Green's function calculation results at small bias voltages.
Myotis Kaup 1829
Creators: name: Huang, Joe Chun-Chia
name: Jazdzyk, Elly Lestari
name: Nusalawo, Meyner
name: Maryanto, Ibnu
name: Maharadatunkamsi
name: Wiantoro, Sigit
name: Kingston, Tigga
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis

description: Myotis sp. 1
 New records
Lampung Province: Kuyung Arang Village, Sukabanjar Village, Sumber Rejo Village.
 New material
Three individuals were collected as voucher specimens. Lampung Province: Sumber Rejo Village, 2♂♂ (MZB 34970, 34990), Sukabanjar Village, 1♀ (MZB 35045).
 Remarks
 This is a small Myotis species (FA = 31.4–34.7 mm) with the wing membrane attached at the base of the toes. The fur is dark brown to black on the upperparts and grayish brown on the underparts. Some individuals have slightly shiny-tipped fur on the upperparts. The skull is generally flat and the second upper premolar is intruded from the toothrow. In comparison to all known Myotis species of the Sunda Shelf, it is similar to Myotis ater in its cranial and dental characters, but differs in the range of forearm length (FA is 34.0–39.0 mm in M. ater — Kingston et al., 2006). The body size and dental characters are similar to M. siligorensis (Yasuma et al., 2003; Kingston et al., 2006) but cranial characters differ (SW, unpublished data). Neither M. ater nor Myotis siligorensis have been recorded on the Sumatran main island although there is a record of M. ater from an offshore island in West Sumatra (Simmons, 2005). Further comparison and molecular analyses are necessary to clarify the taxonomic status of this species. In the study area, it was distinguished from other Myotis species, except M. muricola, by its smaller forearm length. It is indistinguishable from M. muricola externally, but can be differentiated by the tooth arrangement: the second upper premolar (P 3) is in line with the toothrow in M. muricola and displaced inwards such that the adjacent premolars are in contact or nearly so in Myotis sp. 1 (Corbet and Hill, 1992). Individuals were caught with both harp traps and mist nets at ground level in coffee plantations, and sometimes trapped with M. muricola.
description: Published as part of Huang, Joe Chun-Chia, Jazdzyk, Elly Lestari, Nusalawo, Meyner, Maryanto, Ibnu, Maharadatunkamsi, Wiantoro, Sigit & Kingston, Tigga, 2014, A recent bat survey reveals Bukit Barisan Selatan Landscape as a chiropteran diversity hotspot in Sumatra, pp. 413-449 in Acta Chiropterologica 16 (2) on page 435, DOI: 10.3161/150811014X687369, http://zenodo.org/record/3943617
Rotating fermions inside a spherical boundary
Creators: name: Zhang, Zheng
name: Shi, Chao
name: Luo, Xiaofeng
name: Zong, Hong-Shi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply the cannonical quantization procedure to the Dirac field inside a spherical boundary with rotating coordinates. The rotating quantum states with two kinds of boundary conditions, namely, spectral and MIT boundary conditions, are defined. To avoid faster-than-light, we require the speed on the surface to be less than the speed of light. For this situation, the definition of vacuum is unique and identical with the Minkowski vacuum. Finally, we calculate the thermal expectation value of the fermion condensate in a thermal equilibrium rotating fermion field and find it depends on the boundary condition.
Viscoelastic multiscaling in immersed networks
Creators: name: de Araujo, J. L. B.
name: de Sousa, J. S.
name: Ferreira, W. P.
name: Oliveira, C. L. N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Rheological responses are the most relevant features to describe soft matter. So far, such constitutive relations are still not well understood in terms of small scale properties, although this knowledge would help the design of synthetic and bio-materials. Here, we investigate, computational and analytically, how mesoscopic-scale interactions influence the macroscopic behavior of viscoelastic materials. We design a coarse-grained approach where the local elastic and viscous contributions can be controlled. Applying molecular dynamics simulations, we mimic real indentation assays. When elastic forces are dominant, our model reproduces the hertzian behavior. However, when friction increases, it restores the Standard Linear Solid model. We show how the response parameters depend on the microscopic elastic and viscous contributions. Moreover, our findings also suggest that the relaxation times, obtained in relaxation and oscillatory experiments, obey a universal behavior in viscoelastic materials.
title: Europäische Kulturpolitik in Krisenregionen
title: Die Chancen der Kultur
titleType: Subtitle
Creators: name: Mader, Katrin
name: Institut Für Auslandsbeziehungen
Publisher: name: Institut für Auslandsbeziehungen
Year: 2012
Subjects: subject: 10505 International Relations, International Politics, Foreign Affairs, Development Policy
subject: 10507 Peace and Conflict Research, International Conflicts, Security Policy

description: Wo politische Konflikte trennen, kann Kultur einen Raum schaffen für Begegnung, Dialog und Verständigung. Von der Organisation eines Puppentheaters in Afghanistan bis zur Förderung junger Aktivisten in Ägypten – die Mitglieder des Netzwerks Europäischer Kulturinstitute (EUNIC) arbeiten verstärkt in Post-Konflikt-Regionen und Transformationsländern. Dort geht es darum, Kultur- und Bildungsprogramme zu erschließen und zu unterstützen, deren Arbeit zur Stabilisierung des Friedens und zur Konfliktlösung führt sowie die Zivilgesellschaft stärkt.
description: ifa-Edition Kultur und Außenpolitik
Superconductivity and Density Wave in the Quasi-One-Dimensional Systems: Renormalization Group Study
Creators: name: Fuseya, Y.
name: Suzumura, Y.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The anisotropic superconductivity and the density wave have been investigated by applying the Kadanoff-Wilson renormalization group technique to the quasi-one-dimensional system with finite-range interactions. It is found that a temperature (T) dependence of response functions is proportional to exp(1/T) in a wide region of temperature even within the one-loop approximation. Transition temperatures are calculated to obtain the phase diagram of the quasi-one-dimensional system, which is compared with that of the pure-one-dimensional system. Next-nearest neighbor interactions (V_2) induce large charge fluctuations, which suppress the d_{x^2 -y^2}-wave singlet superconducting (dSS) state and enhance the f-wave triplet superconducting (fTS) state. From this effect, the transition temperature of fTS becomes comparable to that of dSS for large V_2, so that field-induced f-wave triplet pairing could be possible. These features are discussed to comprehend the experiments on the (TMTSF)_2PF_6 salt.
description: 8 pages, 4 figures, submitted to J. Phys. Soc. Jpn
Igualdad sindical de los trabajadores remotos en la legislación laboral colombiana
Creators: name: Padilla García, Juan Manuel
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Derecho laboral - Estudios de caso
subject: Sindicatos - Legislación
subject: Derechos civiles - Aspectos jurídicos
subject: Sindicalización digital
subject: Trabajo remoto
subject: Derechos laborales
subject: Negociación colectiva
subject: Igualdad laboral

description: La tesis explora la acción sindical de los trabajadores remotos en el contexto de la digitalización y el trabajo a distancia, destacando los desafíos y las oportunidades que presentan estas modalidades laborales. Analiza cómo la Ley 2121 de 2021 en Colombia establece una igualdad nominal de derechos sindicales entre trabajadores remotos y presenciales, pero identifica que la falta de interacción física y la infraestructura digital limitada impiden un ejercicio efectivo de estos derechos para los trabajadores remotos. La investigación propone un modelo de representación sindical digital y autónomo, adaptado a la naturaleza específica del trabajo remoto, que incluya herramientas tecnológicas para la organización y la negociación colectiva. Se destaca la necesidad de reformas legislativas y estructurales para facilitar un sindicalismo digital efectivo, asegurando que los trabajadores remotos puedan ejercer sus derechos en igualdad de condiciones con sus contrapartes presenciales. Además, se aborda la creación de espacios virtuales seguros y la importancia de actualizar las políticas sindicales para reflejar la realidad del trabajo digital. La tesis concluye que, aunque la digitalización presenta retos significativos, también ofrece oportunidades para innovar en las prácticas sindicales y garantizar la protección de los derechos laborales en el entorno digital.
description: The thesis explores the union action of remote workers in the context of digitalization and remote work, highlighting the challenges and opportunities presented by these labor modalities. It analyzes how Law 2121 of 2021 in Colombia establishes a nominal equality of union rights between remote and on-site workers but identifies that the lack of physical interaction and limited digital infrastructure impede the effective exercise of these rights for remote workers. The research proposes a model of digital and autonomous union representation, tailored to the specific nature of remote work, which includes technological tools for organization and collective bargaining. The need for legislative and structural reforms is emphasized to facilitate effective digital unionism, ensuring that remote workers can exercise their rights on equal terms with their on-site counterparts. Furthermore, the creation of secure virtual spaces is addressed, along with the importance of updating union policies to reflect the reality of digital work. The thesis concludes that, although digitalization presents significant challenges, it also offers opportunities to innovate in union practices and guarantee the protection of labor rights in the digital environment.
How Homophily Affects Learning and Diffusion in Networks
Creators: name: Golub, Benjamin
name: Jackson, Matthew O.
name: Golub, Benjamin
name: Jackson, Matthew O.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Institutional and Behavioral Economics
subject: Networks
subject: Learning
subject: Diffusion
subject: Homophily
subject: Friendships
subject: Social Networks
subject: Random Graphs
subject: Mixing Time
subject: Convergence
subject: Speed of Learning
subject: Speed of Convergence

description: We examine how three different communication processes operating through social networks are affected by homophily - the tendency of individuals to associate with others similar to themselves. Homophily has no effect if messages are broadcast or sent via shortest paths; only connection density matters. In contrast, homophily substantially slows learning based on repeated averaging of neighbors' information and Markovian diffusion processes such as the Google random surfer model. Indeed, the latter processes are strongly affected by homophily but completely independent of connection density, provided this density exceeds a low threshold. We obtain these results by establishing new results on the spectra of large random graphs and relating the spectra to homophily. We conclude by checking the theoretical predictions using observed high school friendship networks from the Adolescent Health dataset.
Additional file 1 of Dietary fish oil supplement induces age-specific contractile and proteomic responses in muscles of male rats
Creators: name: Russ, David W.
name: Dimova, Kalina
name: Morris, Emily
name: Pacheco, Marguerite
name: Garvey, Sean M.
name: Scordilis, Stylianos P.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: 69999 Biological Sciences not elsewhere classified
subject: Computational Biology

description: Additional file 1. We have attached a cleaner version of the supplementary file, with landscape orientation.
Ineficacia de las declaraciones de retención en la fuente. Un análisis comparativo frente a los cambios normativos de los años 2011 al 2023 y su relación con la debida gestión de cobro por parte de la DIAN seccional Villavicencio
Creators: name: Saldarriaga Ramirez, Sergio Alejandro
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Procedimiento tributario - Legislación
subject: Cobro de cuentas - Aspectos jurídicos
subject: Retención en la fuente - Colombia
subject: Retenciones ineficaces
subject: Eficiencia
subject: Exceso de Ritual Manifiesto
subject: Prescripción

description: Analizar la evolución que ha tenido la figura de la ineficacia desde su origen, las dificultades que se presentaron en sus primeras versiones en los procesos de cobro coactivo, las distintas soluciones que presentó el legislador, Finalmente el trabajo pretende demostrar desde el punto de vista práctico como ha sido la relación de esta figura con la gestión de cobro coactivo por parte de la DIAN, concretamente en la secciona! de Villavicencio.
description: Analyze the evolution that the figure of inefficiency has had since its origin, the difficulties that arose in its first versions in the coercive collection processes, the different solutions presented by the legislator. Finally, the work aims to demonstrate from a practica! point of view What has been the relationship of this figure with the management of coercive collection by the DIAN, specifically in the Villavicencio section.
Probing Massive Scalar/Vector Fields with Binary Pulsars
Creators: name: Seymour, Brian C.
name: Yagi, Kent
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Precision tests of general relativity can be conducted by observing binary pulsars. Theories with massive fields exist to explain a variety of phenomena from dark energy to the strong CP problem. Existing pulsar binaries, such as the white dwarf-pulsar binary J1738+0333, have been used to place stringent bounds on the scalar dipole emission, and radio telescopes may detect a pulsar orbiting a black hole in the future. In this paper, we study the ability of pulsar binaries to probe theories involving massive scalar and vector fields through the measurement of the orbital decay rate. With a generic framework, we describe corrections to orbital decay rate due to (a) modification of GR quadrupolar radiation and (b) dipolar radiation of a massive field. We then consider three concrete examples: (i) massive Brans-Dicke theory, (ii) general relativity with axions, and (iii) general relativity with bound dark matter and a dark force. Finally, we apply direct observations of J1738 and simulations of a black hole-pulsar binary to bound theory parameters such as field's mass and coupling constant. We find new constraints on bound dark matter interactions with PSR J1738, and a black hole-pulsar discovery would likely improve these further. Such bounds are complementary to future gravitational-wave bounds. Regarding other theories, we find similar constraints to previous pulsar measurements for massive Brans-Dicke theory and axions. These results show that new pulsar binaries will continue to allow for more stringent tests of gravity.
description: minor edits, 12 pages, 3 figures
Kirsch, J. P.: Der stadtrömische christliche Festkalender im Altertum
Creators: name: Baumstark, Anton
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 23 Nr. 1 (1927): Oriens christianus, Band 23, Heft 1
Team Formation in a Network
Creators: name: Kinateder, Markus
name: Kinateder, Markus
Publisher: name: Unknown
Year: 2009
Subjects: subject: Institutional and Behavioral Economics
subject: Dynamic Competitive Group Formation
subject: Imperfect Information

description: Two project leaders (or entrepreneurs) in a network, which captures social relations, recruit players in a strategic, competitive and time-limited process. Each team has an optimal size depending on the project’s quality. This is a random variable with a commonly known distribution. Only the corresponding project leader observes its realization. Any decision is only observed by the involved agents. The set of pure strategy Sequential Equilibria is characterized by giving an algorithm that selects one equilibrium at a time. An agent’s expected payoff is related to his position in the network, though no centrality measure in the literature captures this relation. A social planner frequently would achieve a higher welfare.
The prospects for finding brown dwarfs in eclipsing binary systems and measuring brown dwarf properties
Creators: name: Pinfield, D. J.
name: Jones, H. R. A.
name: Steele, I. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a simulation to investigate the prospects of measuring mass, age, radius, metallicity and luminosity data for brown dwarfs in fully eclipsing binary systems around late K and early M dwarfs identified by ultra-wide-field transit surveys. These surveys will monitor approximately a million K and M dwarfs at a level sufficient to detect transits of low luminosity companions. We look at the current observational evidence for such systems, and suggest that about 1% of late K and early-mid M dwarfs could have a very close BD companion. With this assumption, and using the SuperWASP transit survey as an example, our simulation predicts that 400 brown dwarfs in fully eclipsing binary systems could be discovered. All of these eclipsing binaries could yield accurate brown dwarf mass and radius measurements. By inferring the brown dwarf effective temperature distribution, assuming a uniform age spread and an alpha=0.5 companion brown dwarf mass function, the simulation estimates that brown dwarf brightness could also be measurable (at the 10% level) for about 60 of these binary systems from the secondary eclipse. Irradiation of the brown dwarfs will be below the 10% level for about 70% of these systems, meaning that the measured brown dwarf brightnesses should generally be the same as those of free-floating counterparts. The predicted age distribution of the primaries is dominated by young systems, and about 20 binaries could be younger than 1Gyr. We suggest that many of these young binary systems will be members of ``kinematic moving groups'', allowing their ages to be accurately constrained.
description: 55 pages, 9 figures, to be published in PASP
Dark Higgs Dark Matter
Creators: name: Mondino, Cristina
name: Pospelov, Maxim
name: Ruderman, Joshua T.
name: Slone, Oren
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A new $U(1)$ dark gauge group coupled to the Standard Model (SM) via the kinetic mixing portal provides a natural dark matter candidate in the form of the Higgs field, $h_d$, responsible for generating the mass of the dark photon, $γ_d$. We show that the condition $m_{h_d}\leq m_{γ_d}$, together with smallness of the kinetic mixing parameter, $ε$, and/or dark gauge coupling, $g_d$, leads the dark Higgs to be sufficiently metastable to constitute dark matter. We analyze the Universe's thermal history and show that both freeze-in, ${\rm SM}\to \{γ_d, h_d\}$, and freeze-out, $ \{γ_d, h_d\} \to {\rm SM}$, processes can lead to viable dark Higgs dark matter with a sub-GeV mass and a kinetic mixing parameter in the range $10^{-13}\lesssimε\lesssim10^{-6}$. Observable signals in astrophysics and cosmology include modifications to primordial elemental abundances, altered energetics of supernovae explosions, dark Higgs decays in the late Universe, and dark matter self-interactions.
description: 5 pages, 3 appendices, 7 figures
Optimization of Liposome-mediated transfection in sf9 insect cells and analysis of intergration pattern and copy number in stably transformed cell lines
Creators: name: Kwon, Eun-Joo Gina
Publisher: name: University of British Columbia
Year: 2009

description: With increasing application of DNA transfer technology in human gene therapy and heterologous protein production, various methods of introducing DNA into ex vivo or in vivo cells have been developed in a wide variety of cells. Recently, growing interest has focused on insect cells for production of heterologous proteins. Insect expression systems have been recognized as an easy and rapid system for production of a large quantity of recombinant or therapeutic proteins. Liposome-mediated transfection is an effective non-viral delivery method. However, optimization is essential to achieve maximal production of the heterologous proteins. The goal of this project is to optimize the transgene expression in Sf9 insect cells using lipofection. Transfection variables involved in the efficiency of transgene uptake by cells were examined for optimization. The type of cationic liposomes and the liposome to DNA ratios were the most significant determinants of efficient DNA uptake. The transient expression of the B-galactosidase reporter gene could be improved by 7.8 fold by optimization. Southern blot analyses revealed that the integrated plasmids were predominantly arranged into head-to-tail concatemers in all the stably transformed cell lines except for one. The concatemeric integration was speculated to occur by extrachromosomal homologous recombination between plasmid DNAs and a subsequent illegitimate recombination into the chromosomal DNA by a double-strand break repair pathway. Up to a 27-fold difference in the integrated copy number was observed among 19 stably transformed cell lines by quantitative southern blot analyses. The reporter gene expression in stably transformed cells could be correlated with the integrated copy number in general. In addition to the copy number, the positional effect of the integration loci is likely to play a role in controlling the expression level. A large amount of DNA uptake reflected on the high transient expression is necessary, but not sufficient for high expression in stable cells. However, there appeared to be higher probability of obtaining high-producer cell lines with high transient expression. Therefore, the use of a lipofection protocol, producing high transient expression, is advantageous in producing high producer stable cell lines.
Cooperation through Imitation and Exclusion in Networks
Creators: name: Fosco, Constanza
name: Mengel, Friederike
name: Fosco, Constanza
name: Mengel, Friederike
Publisher: name: Unknown
Year: 2009
Subjects: subject: Institutional and Behavioral Economics
subject: Game Theory
subject: Cooperation
subject: Imitation Learning
subject: Network Formation

description: We develop a simple model to study the coevolution of interaction structures and action choices in Prisoners’ Dilemma games. Agents are boundedly rational and choose both actions and interaction partners via payoff-based imitation. The dynamics of imitation and exclusion yields polymorphic outcomes under a wide range of parameters. Depending on the parameters of the model two scenarios can arise. Either there is “full separation” of defectors and cooperators, i.e. they are found in two different, disconnected components. Or there is “marginalization” of defectors, i.e. connected networks emerge with a center of cooperators and a periphery of defectors. Simulations confirm our analytical results and show that the share of cooperators increases with the speed at which the network evolves, increases with the radius of interaction and decreases with the radius of information of agents.