cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The effect of MHD turbulence on massive protoplanetary disk fragmentation
Creators: name: Fromang, Sebastien
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Massive disk fragmentation has been suggested to be one of the mechanisms leading to the formation of giant planets. While it has been heavily studied in quiescent hydrodynamic disks, the effect of MHD turbulence arising from the magnetorotational instability (MRI) has never been investigated. This paper fills this gap and presents 3D numerical simulations of the evolution of locally isothermal, massive and magnetized disks. In the absence of magnetic fields, a laminar disk fragments and clumps are formed due to the effect of self--gravity. Although they disapear in less than a dynamical timescale in the simulations because of the limited numerical resolution, various diagnostics suggest that they should survive and form giant planets in real disks. When the disk is magnetized, it becomes turbulent at the same time as gravitational instabilities develop. At intermediate resolution, no fragmentation is observed in these turbulent models, while a large number of fragments appear in the equivalent hydrodynamical runs. This is because MHD turbulence reduces the strength of the gravitational instability. As the resolution is increased, the most unstable wavelengths of the MRI are better resolved and small scale angular momentum transport starts to play a role: fragments are found to form in massive and turbulent disks in that case. All of these results indicate that there is a complicated interaction between gravitational instabilities and MHD turbulence that influences disk fragmentation processes.
description: 8 pages, 8 figures, accepted for publication in Astronomy & Astrophysics
Inverse Prism based on Temporal Discontinuity and Spatial Dispersion
Creators: name: Akbarzadeh, Alireza
name: Chamanara, Nima
name: Caloz, Christophe
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We introduce the concept of the inverse prism as the dual of the conventional prism and deduce from this duality an implementation of it based on temporal discontinuity and spatial dispersion provided by anisotropy. Moreover, we show that this inverse prism exhibits the following three unique properties: chromatic refraction birefringence, ordinary-monochromatic and extraordinary- polychromatic temporal refraction, and linear-to-Lissajous polarization transformation.
Additional file 2: of Clinical trial registration and reporting: a survey of academic organizations in the United States
Creators: name: Mayo-Wilson, Evan
name: Heyward, James
name: Keyes, Anthony
name: Reynolds, Jesse
name: White, Sarah
name: Atri, Nidhi
name: G. Alexander
name: Omar, Audrey
name: Ford, Daniel
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy

description: Eligible accounts. (DOCX 452Â kb)
title: Lettre de Jacques Leibowitch à Paul Kelly (Hôpital Necker)
Creators: name: Leibowitch, Jacques
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Source: http://www.calames.abes.fr/pub/ms/Calames-20193111134190925
Two-way quantum communication channels
Creators: name: Childs, Andrew M.
name: Leung, Debbie W.
name: Lo, Hoi-Kwong
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider communication between two parties using a bipartite quantum operation, which constitutes the most general quantum mechanical model of two-party communication. We primarily focus on the simultaneous forward and backward communication of classical messages. For the case in which the two parties share unlimited prior entanglement, we give inner and outer bounds on the achievable rate region that generalize classical results due to Shannon. In particular, using a protocol of Bennett, Harrow, Leung, and Smolin, we give a one-shot expression in terms of the Holevo information for the entanglement-assisted one-way capacity of a two-way quantum channel. As applications, we rederive two known additivity results for one-way channel capacities: the entanglement-assisted capacity of a general one-way channel, and the unassisted capacity of an entanglement-breaking one-way channel.
description: 21 pages, 3 figures
TRAKTORLARNING ISHCHI VA YORDAMCHI JIHOZLARINI TAKOMILLASHTIRISH
Creators: name: Atadjanov Durdibay Samandarovich
Publisher: name: Zenodo
Year: 2024

description: Annotasiya. Ushbu maqolada traktorlarning ishchi va yordamchi jihozlarini, ayniqsa plug, kultivator, seyalka kabi asbob-uskunalarni rivojlantirish istiqbollari tahlil qilingan. So'nggi yillardagi ilmiy adabiyotlar tahliliga asoslanib, vertikal pluglar, kombinasiyalashgan kultivatorlar va pnevmatik seyalkalarning afzalliklari ko'rsatib berilgan. Zamonaviy jihozlar yordamida yer sifatliroq ishlanishi, unumdorlik oshishi va mehnat sarfi kamayishi ta'kidlangan.

Kalit so'zlar: traktor, plug, kultivator, seyalka, vertikal plug, kombinasiyalashgan kultivator, pnevmatik seyalka
Fano 3-folds in $\mathbb {P^2} \times \mathbb {P^2}$ format, Tom and Jerry
Creators: name: Brown, Gavin
name: Kasprzyk, Alexander
name: Qureshi, Muhammad Imran
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We study Q-factorial terminal Fano 3-folds whose equations are modelled on those of the Segre embedding of P^2 x P^2. These lie in codimension 4 in their total anticanonical embedding and have Picard rank 2. They fit into the current state of classification in three different ways. Some families arise as unprojections of degenerations of complete intersections, where the generic unprojection is a known prime Fano 3-fold in codimension 3; these are new, and an analysis of their Gorenstein projections reveals yet other new families. Others represent the "second Tom" unprojection families already known in codimension 4, and we show that every such family contains one of our models. Yet others have no easy Gorenstein projection analysis at all, so prove the existence of Fano components on their Hilbert scheme.
description: 20 pages, 2 tables. Reference added
Hidden variables in quantum mechanics: Generic models, set-theoretic forcing, and the emergence of probability
Creators: name: Van Wesep, Robert A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Logic (math.LO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The hidden-variables premise is shown to be equivalent to the existence of generic filters for algebras of commuting propositions and for certain more general propositional systems. The significance of this equivalence is interpreted in light of the theory of generic filters and boolean-valued models in set theory (the method of forcing). The apparent stochastic nature of quantum observation is derived for these hidden-variables models.
description: 67 pages. Corrected formulas for conditional and joint probabilities per comment of J. Malley
MOESM2 of The reporting of a Bacillus anthracis B-clade strain in South Africa after more than 20Â years
Creators: name: K. Lekota
name: A. Hassim
name: P. Rogers
name: E. Dekker
name: R. Last
name: L. Klerk-Lorist
name: H. Heerden
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Evolutionary Biology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2: Table S2. Genome alignment of the Bacillus anthracis KC2011 to the B. anthracis Ames ancestor reference.
Mitochondrial Pyruvate Metabolism Induces Pseudohypoxia and Mitophagy
Creators: name: Saragsyan, Ahot
Publisher: name: University of Utah
Year: 2019
Subjects: Molecular biology
Cellular biology
Biochemistry

description: Mitochondria play a central role in cellular energy metabolism, and they supply most cellular adenosine triphosphate (ATP). During production of ATP, mitochondria also produce reactive oxygen species that could be damaging to mitochondria and to other cellular compartments. To limit and control the production of excessive reactive oxygen production, mitochondria have developed several quality control mechanisms that ensure mitochondrial integrity. Degradation of mitochondria through autophagy is the last step in mitochondrial quality control. Although mitochondrial dysfunctions are described in many human diseases including neurological diseases, diabetes, and cancer, there is little known about whether mitophagy plays any role in the etiology of these diseases. Partly this could be explained by the fact that for a long time mitophagy has been considered a nonselective process. Now several lines of evidence suggest that mitophagy is a steady state process, and in metabolically active tissues, the half-life of mitochondria is as low as two days. Possibly another reason for the slow progress in mitophagy research has been the lack of easily applicable and sensitive methods for mitophagy detection, and most mitophagic research has been done in settings of extreme mitochondrial stress. For example, carbonyl cyanide m-chlorophenyl hydrazone (CCCP), an uncoupling agent of the mitochondrial proton gradient, has been extensively used. Although CCCP and other global mitochondrial stressors are excellent inducers of mitophagy, they affect the entire mitochondrial pool, and in most cases, do not recapitulate any given physiological or pathophysiological condition. Here we report a sensitive and highly quantifiable method for detection of mitophagy and autophagy in parallel that could be applied to physiological conditions of cells. This method relies on lysosomal delivery of mitochondrial targeted pH-sensitive Rosella biosensors and could reliably detect even very weak induction of mitophagy. Moreover, using this method we identified that pyruvate metabolism in mitochondria induces mitophagy. This mitophagy is mediated by pseudohypoxic induction of hypoxia inducible factor 1?. Interestingly, we discovered that even close to physiological levels of glucose can induce this pathway. Importantly, this process is completely blocked with pharmacological inhibitors of the mitochondrial pyruvate carrier. Thiazolidinediones, a class of insulin sensitizing medications, are known to inhibit the mitochondrial pyruvate carrier. Here, we show that thiazolidinediones are effective inhibitors of pyruvate induced pseudohypoxia. This observation is particularly interesting since thiazolidinediones are actively prescribed. Whether this phenomenon is clinically relevant remains to be studied.
The Steklov spectrum of cuboids
Creators: name: Girouard, Alexandre
name: Lagacé, Jean
name: Polterovich, Iosif
name: Savo, Alessandro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Spectral Theory (math.SP)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35P20

description: The paper is concerned with the Steklov eigenvalue problem on cuboids of arbitrary dimension. We prove a two-term asymptotic formula for the counting function of Steklov eigenvalues on cuboids in dimension d greater or equal to 3. Apart from the standard Weyl term, we calculate explicitly the second term in the asymptotics, capturing the contribution of the (d-2)-dimensional facets of a cuboid. Our approach is based on lattice counting techniques. While this strategy is similar to the one used for the Dirichlet Laplacian, the Steklov case carries additional complications. In particular, it is not clear how to establish directly the completeness of the system of Steklov eigenfunctions admitting separation of variables. We prove this result using a family of auxiliary Robin boundary value problems. Moreover, the correspondence between the Steklov eigenvalues and lattice points is not exact, and hence more delicate analysis is required to obtain spectral asymptotics. Some other related results are presented, such as an isoperimetric inequality for the first Steklov eigenvalue, a concentration property of high frequency Steklov eigenfunctions and applications to spectral determination of cuboids.
description: 31 pages, 3 figures
R scripts for 'Sustained bacterial N2O reduction at acidic pH'
Creators: name: He, Guang
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 310703
subject: Microbial ecology
classificationCode: 410501
subject: Environmental biogeochemistry

description: This folder contains R scripts required to produce figures present in manuscript 'Sustained bacterial N2O reduction at acidic pH'.
title: Extending ”PathoLearn” with an End-To-End Artificial Intelligence Platform
Creators: name: Neemann, Jannes
Publisher: name: Hochschule Hannover
Year: 2024
Subjects: subject: 610 Medizin, Gesundheit
subject: 004 Informatik

description: Pathologists need to identify abnormal changes in tissue. With the developing digitalization, the used tissue slides are stored digitally. This enables pathologists to annotate the region of interest with the support of software tools. PathoLearn is a web-based learning platform explicitly developed for the teacher-student scenario, where the goal is that students learn to identify potential abnormal changes. Artificial intelligence (AI) and machine learning (ML) have become very important in medicine. Many health sectors already utilize AI and ML. This will only increase in the future, also in the field of pathology. Therefore, it is important to teach students the fundamentals and concepts of AI and ML early in their studies. Additionally, creating and training AI generally requires knowledge of programming and technical details. This thesis evaluates how this boundary can be overcome by comparing existing end-to-end AI platforms and teaching tools for AI. It was shown that a visual programming editor offers a fitting abstraction for creating neural networks without programming. This was extended with real-time collaboration to enable students to work in groups. Additionally, an automatic training feature was implemented, removing the necessity to know technical details about training neural networks.
Phonon mediated conversion of exciton-polaritons Rabi oscillation into THz radiation
Creators: name: Rojan, Katharina
name: Leger, Yoan
name: Morigi, Giovanna
name: Richard, Maxime
name: Minguzzi, Anna
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Semiconductor microcavities in the strong-coupling regime exhibit an energy scale in the THz frequency range, which is fixed by the Rabi splitting between the upper and lower exciton-polariton states. While this range can be tuned by several orders of magnitude using different excitonic medium, the transition between both polaritonic states is dipole forbidden. In this work we show that in Cadmium Telluride microcavities, the Rabi-oscillation driven THz radiation is actually active without the need for any change in the microcavity design. This feature results from the unique resonance condition which is achieved between the Rabi splitting and the phonon-polariton states, and leads to a giant enhancement of the second order nonlinearity.
description: 6 pages, 2 figures
Einstein-de Sitter model re-examined for the newly discovered SNe Ia
Creators: name: Vishwakarma, R. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Consistency of Einstein-de Sitter model with the recently observed SNe Ia by the Hubble Space Telescope is examined. The model shows a reasonable fit to the observation, if one takes into account the extinction of SNe light by the intergalactic metallic dust ejected from the SNe explosions. Though the fit to the new data is worsened considerably compared with the earlier data, it can still be regarded acceptable. We should wait for more accurate observations at higher redshifts (as expected from the coming space missions such as SNAP and JWST) in order to rule out a model, which seems to explain all the other existing observations well (some even better than the favoured $Λ$CDM model), is consistent with beautiful theoretical ideas like inflation and cold dark matter, and is not as speculative as the models of dark energy.
description: 14 pages including 2 figures, to appear in the Mon. Not. Roy. Astron. Soc
Basnage, Henri, Traité des hipotéques, divisé en deux parties, Rouen, J.-B. Besongne fils ; Paris, A. Cailleau, 1724
Creators: name: Basnage de Beauval, Henri
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2019

description: Source: https://gallica.bnf.fr/ark:/12148/bpt6k9611851x
description: Relation: vignette : https://www.nakala.fr/data/11280/f7f302ec
Quantum-Information Theoretic Properties of Nuclei and Trapped Bose Gases
Creators: name: Moustakidis, Ch. C.
name: Chatzisavvas, K. Ch.
name: Panos, C. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Fermionic (atomic nuclei) and bosonic (correlated atoms in a trap) systems are studied from an information-theoretic point of view. Shannon and Onicescu information measures are calculated for the above systems comparing correlated and uncorrelated cases as functions of the strength of short range correlations. One-body and two-body density and momentum distributions are employed. Thus the effect of short-range correlations on the information content is evaluated. The magnitude of distinguishability of the correlated and uncorrelated densities is also discussed employing suitable measures of distance of states i.e. the well known Kullback-Leibler relative entropy and the recently proposed Jensen-Shannon divergence entropy. It is seen that the same information-theoretic properties hold for quantum many-body systems obeying different statistics (fermions and bosons).
description: 24 pages, 9 figures, 1 table
title: Student Affairs Professionals Supporting Students with Disabilities: A Grounded Theory Model
Creators: name: Kimball, Ezekiel
name: Vaccaro, Annemarie
name: Vargas, Nadia
Publisher: name: University of Massachusetts Amherst
Year: 2016
Subjects: subject: Disability and Equity in Education
subject: Higher Education
subject: Student Counseling and Personnel Services

description: For published version of this article, please visit: Kimball, E., Vaccaro, A., & Vargas, N. (2016). Student affairs professionals supporting students with disabilities: A grounded theory model. Journal of Student Affairs Research & Practice, 53(2), 175-189. doi: 10.1080/19496591.2016.1118697
description: In an action-based grounded theory project, the authors collected data from 31 student affairs professionals. During seven focus groups, practitioners described feeling unknowledgeable about disability law, accommodations, and diagnoses. However, they drew upon their core values and transferrable skills to support individual students. Participants wanted to move beyond "small wins" with individual students to campus-wide inclusion. To achieve this goal, they engaged in self-directed learning, collaboration, and proactive strategies. An emergent model is presented.
Fault-tolerant fermionic quantum computation based on color code
Creators: name: Li, Ying
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An important approach to the fault-tolerant quantum computation is protecting the logical information using the quantum error correction. Usually, the logical information is in the form of logical qubits, which are encoded in physical qubits using quantum error correction codes. Compared with the qubit quantum computation, the fermionic quantum computation has advantages in quantum simulations of fermionic systems, e.g. molecules. In this paper, we show that the fermionic quantum computation can be universal and fault-tolerant if we encode logical Majorana fermions in physical Majorana fermions. We take a color code as an example to demonstrate the universal set of fault-tolerant operations on logical Majorana fermions, and we numerically find that the fault-tolerance threshold is about 0.8%.
description: 13 pages, 6 figures and 1 table; Version 2: References are updated
Microtubule function during early development in Silvetia compressa
Creators: name: Peters, Nicholas Thomas
Publisher: name: University of Utah
Year: 2019
Subjects: Evolution and Development

description: Embryonic development is one of the most critical stages of the life cycle for most eukaryotic organisms. Extrinsic and intrinsic signals must be perceived and transduced to facilitate proper organization of a body plan. Cellular components must then be selectively segregated to different parts of the embryo and accompanying morphological changes must be precisely positioned. To aid the cell in orchestration of these dynamic events, the cytoskeleton performs many tasks, including structural support, organelle positioning, vesicle transport, and localization of polarity molecules. While microtubules have been extensively examined in vascular plants and animals, much less is known about their roles in the stramenopile lineage. In the brown alga Silvetia compressa, I examined the structural and functional roles of microtubules during early development. In contrast to previous reports, I found that microtubule arrays become asymmetrically oriented toward the apex of the rhizoid pole during polarization. These microtubule arrays organize the endoplasmic reticulum and target it toward the rhizoid pole. I also showed that the phospholipase D and phospholipase C signaling pathways are functional in brown algae and are needed for organization of the cytoskeleton Finally, I examined the microtubule-associated motor protein Kinesin-5 (Eg5) during spindle assembly and highlighted its functional similarities and differences with vascular plants and animals. This work has yielded insights into conserved and novel traits possessed solely by brown algae and has led to a significant revision of the model for early development.
Blind MultiChannel Identification and Equalization for Dereverberation and Noise Reduction based on Convolutive Transfer Function
Creators: name: Li, Xiaofei
name: Horaud, Radu
name: Gannot, Sharon
Publisher: name: arXiv
Year: 2017
Subjects: subject: Sound (cs.SD)
subject: FOS: Computer and information sciences

description: This paper addresses the problems of blind channel identification and multichannel equalization for speech dereverberation and noise reduction. The time-domain cross-relation method is not suitable for blind room impulse response identification, due to the near-common zeros of the long impulse responses. We extend the cross-relation method to the short-time Fourier transform (STFT) domain, in which the time-domain impulse responses are approximately represented by the convolutive transfer functions (CTFs) with much less coefficients. The CTFs suffer from the common zeros caused by the oversampled STFT. We propose to identify CTFs based on the STFT with the oversampled signals and the critical sampled CTFs, which is a good compromise between the frequency aliasing of the signals and the common zeros problem of CTFs. In addition, a normalization of the CTFs is proposed to remove the gain ambiguity across sub-bands. In the STFT domain, the identified CTFs is used for multichannel equalization, in which the sparsity of speech signals is exploited. We propose to perform inverse filtering by minimizing the $\ell_1$-norm of the source signal with the relaxed $\ell_2$-norm fitting error between the micophone signals and the convolution of the estimated source signal and the CTFs used as a constraint. This method is advantageous in that the noise can be reduced by relaxing the $\ell_2$-norm to a tolerance corresponding to the noise power, and the tolerance can be automatically set. The experiments confirm the efficiency of the proposed method even under conditions with high reverberation levels and intense noise.
description: 13 pages, 5 figures, 5 tables
Measurement of the D+ --> pi+ pi0 and D+ --> K+ pi0 Branching Fractions
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present measurements of the branching fractions for the Cabbibo suppressed decays D+ --> pi+ pi0 and D+ --> K+ pi0 based on a data sample corresponding to an integrated luminosity of 124.3 fb-1. The data were taken with the BABAR detector at the PEP-II B Factory operating on and near the Y(4S) resonance. We find BR(D+ --> pi+ pi0) = (1.22 +/- 0.10 +/- 0.08 +/- 0.08) * 10^(-3) and BR(D+ --> K+ pi0) = (2.46 +/- 0.46 +/- 0.24 +/- 0.16) * 10^(-4), where the first uncertainty is statistical, the second systematic and the last error is due to the uncertainties in the absolute branching fraction scale for D+ mesons. This represents the first observation of the doubly Cabibbo-suppressed D+ --> K+ pi0 decay mode and an improved measurement of the D+ --> K+ pi0 branching fraction.
description: 8 pages, 5 postscript figures
An Algorithmic Test for Diagonalizability of Finite-Dimensional PT-Invariant Systems
Creators: name: Weigert, Stefan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A non-Hermitean operator does not necessarily have a complete set of eigenstates, contrary to a Hermitean one. An algorithm is presented which allows one to decide whether the eigenstates of a given PT-invariant operator on a finite-dimensional space are complete or not. In other words, the algorithm checks whether a given PT-symmetric matrix is diagonalizable. The procedure neither requires to calculate any single eigenvalue nor any numerical approximation.
description: 13 pages, 1 figure
Additional file 1: of Clinical trial registration and reporting: a survey of academic organizations in the United States
Creators: name: Mayo-Wilson, Evan
name: Heyward, James
name: Keyes, Anthony
name: Reynolds, Jesse
name: White, Sarah
name: Atri, Nidhi
name: G. Alexander
name: Omar, Audrey
name: Ford, Daniel
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Survey instrument. (DOCX 500Â kb)
Alexandrov's theorem revisited
Creators: name: Delgadino, M. G.
name: Maggi, F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 49Q10, 49Q20, 53A10

description: We show that among sets of finite perimeter balls are the only volume-constrained critical points of the perimeter functional.
description: Version 2: Remarks on Wente's tori and volume-preserving mean curvature flows added. More detailed description of the main proof added. Theorem 2 in version 1 (Wulff shapes are the only local minimizers of anisotropic energies) has been moved to a separate preprint
Perimeter Series
Creators: name: METOD BLEJEC
Publisher: name: PSIAX: Estudos e Reflexões sobre Desenho e Imagem
Year: 2023

description: "Como é que caminhar se pode traduzir num desenho de forma significativa? Como é que as viagens em tempo real podem ser transcritas para meios bidimensionais de comunicação? Perimeter é uma série de passeios traçados bem como um conjunto de instruções sobre como executar desenhos em escala macro."
description: PSIAX: Estudos e Reflexões sobre Desenho e Imagem, Vol. 1 N.º #4- 2ª série (2020): Como o andar e o desenhar se cruzam
Microtubule Geometry and Thermal Modulation of Molecular Motors Tug-Of-War
Creators: name: Osunbayo, Olaolu Abiola
Publisher: name: University of Utah
Year: 2019
Subjects: subject: Biophysics
subject: Physiology
subject: FOS: Biological sciences

description: The majority of studies of intracellular transport have focused on cargos that move well over some distance. However, a significant percentage of intracellular cargos at any given time remain in a stalled or locally diffusive state. The goal of my graduate work was to study the processes that lead to localized non-motile or weakly motile cargos. In my first work (Chapter 2), I showed that cargos driven by a team of kinesins can spend a significant amount of time at microtubule (MT) intersections, especially when the intersecting MTs are counter-aligned. The work in Chapter 2 was done in two dimensions (2D) with MT attached to the surface of a coverslip. To enable more biologically faithful studies, I contributed to the development of a novel technique (Chapter 3) to manipulate MTs in three dimensions (3D). This work now enables the construction of MT structures in a controlled environment in a fully suspended geometry. The study in Chapter 4 was motivated by the need to understand cold block of MT-based transport seen in some mammalian neurons and how this is overcome in cold adapted organisms. I have explored the differences in how temperature affects the activity of biological motors and helped model how these differences modulate the tug-of-war between the two opposite directed motors. Lastly, it is critical in the study of nearly immotile cargos to distinguish when the cargo is not moving due to opposite-directed motor activity from when it is driven by a thermally-driven random process such as Brownian diffusion. I showed (Chapter 5) that in contrast to diffusion, tug-of-war follows Arrhenius kinetics which reflects motor activation energy. I used a bi-directional kinesin NCD N340K mutant, on a single MT in-vitro. I also showed that this system of tug-of-war displays complex behavior. In contrast to thermal diffusion, this tug-of-war is sub-diffusive at short time intervals and it only becomes effectively diffusive at longer time intervals. In addition, I showed that the tug-of-war leads to an unexpected skewed distribution of diffusion coefficients within experimental sample range and I have helped develop a theoretical understanding of how this could arise in my model system.
High-energetic Cosmic Antiprotons from Kaluza-Klein Dark Matter
Creators: name: Bringmann, Torsten
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The lightest Kaluza-Klein particle (LKP) in models with universal extra dimensions is an interesting dark matter candidate that has recently received great attention. Here, we investigate the antiproton flux from LKP annihilations in the galactic halo. In our analysis we include different halo density profiles and allow for part of the dark matter to be concentrated in 'clumps' rather than being distributed homogeneously. After re-analyzing the observational bounds on the allowed amount of clumpiness, we find that LKP annihilations may well give a significant contribution to the antiproton flux at energies higher than about 10 GeV, while for energies above around 500 GeV the conventional background is expected to dominate again. The shortly upcoming PAMELA satellite will already be able to measure part of this high-energy window, while planned experiments like AMS-02 will have access to the full energy range of interest.
description: 16 pages IOP latex style, 5 figures. Slightly updated to match the published version (including, in particular, an extended discussion on the positron peak at high energies)
Drawing Walking Fasai
Creators: name: CROFT, MICHAEL
Publisher: name: PSIAX: Estudos e Reflexões sobre Desenho e Imagem
Year: 2023

description: O artigo apresenta um exercício de desenho referente à substituição do autor do passeio com o seu cão, chamado Fasai, por um caderno de esboços e respectivos desenhos. Para esse fim, repete a rotina diária do Fasai em torno de uma vila local. A isto, o autor chama exercício de mapeamento, a partir do qual procura determinar a marcação do território do cão como pontos nodais em movimento. Para ajudar a gravar a caminhada e permitir que uma série de oito desenhos seja vista em processo, o autor usa uma câmara de ação diante de seus olhos para captura de vídeo e grava as suas observações ao microfone. Coletivamente, o exercício gera material para discussão e reflexão que se explora no presente artigo. A atividade é realizada duas vezes, resultando em duas camadas de trabalho de cada um dos desenhos, dois vídeos, cada um com cerca de sessenta minutos de duração e duas gravações de voz. As transcrições que foram escritas das gravações de voz e as seções são mostradas juntamente com as capturas de tela mais relevantes dos vídeos. Tais transcrições indicam, por um lado, o grau de disfuncionalidade da fala, e sugerem reciprocamente a flutuação do autor entre dois tipos diferentes de foco de concentração. O autor discute a eficácia do desenho enquanto caminha e os tipos de perguntas que essa atividade suscita por referência a uma idéia particular de imagem do filósofo Henri Bergson, à fenomenologia de Merleau-Ponty e a uma idéia do olhar em tomada de decisão subjetiva pelo psicanalista Jacques Lacan. Tais referências estão ligadas através dos fenómenos, do movimento e do tempo que são parte integrante da atividade de desenhar enquanto caminha. O motivo pessoal do autor para o trabalho, desenho e escrita em conjunto, é comemorar a recente morte de Fasai.
description: PSIAX: Estudos e Reflexões sobre Desenho e Imagem, Vol. 1 N.º #4- 2ª série (2020): Como o andar e o desenhar se cruzam
title: 01_0847
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Mitochondrial Pyruvate Metabolism in Cancer and Stem Cells of the Colon Epithelium
Creators: name: Olson, Kristofor Aksamit
Publisher: name: University of Utah
Year: 2019

description: The study of metabolism is fundamental to understanding the basis of disease. Subtle differences in metabolites, and shunting of molecules from one pathway to another can have profound effects on cellular physiology. In the case of cancer cells this metabolic balance is often severely disrupted. Many cancer cells rapidly consume glucose to produce pyruvate, but rather than entering the mitochondria for oxidation, it is reduced to lactate and excreted from the cell. This phenomenon is known as the "Warburg effect" and provides the cell ample biosynthetic precursors for proliferation, many of which are side-reactions of glycolysis. Similar to cancer cells, stem cells also place a heavy metabolic emphasis on glycolysis. During the process of differentiation, however, stem cells shift their metabolic profile towards oxidative phosphorylation and mitochondrial respiration. Unlike stem cells, many cancer cells are limited in their ability to adapt to a different, more oxidative metabolic regime. In both cancer cells and stem cells, the fate of pyruvate is tightly controlled. The mitochondrial pyruvate carrier (MPC), a heterodimeric protein complex, is required for pyruvate import into the mitochondria. The recent discovery of the genes encoding the MPC have provided a new lens to evaluate pyruvate metabolism in normal and disease physiology. Herein, the role of the MPC and its connection to the Warburg effect are described in the context of normal physiology, colon cancer, and resident colon stem cells.
Segre variety, conifold, Hopf fibration, and separable multi-qubit states
Creators: name: Heydari, Hoshang
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We establish relations between Segre variety, conifold, Hopf fibration, and separable sets of pure two-qubit states. Moreover, we investigate the geometry and topology of separable sets of pure multi-qubit states based on a complex multi-projective Segre variety and higher order Hopf fibration.
description: 9 pages
Additional file 5: of Bidirectional promoters exhibit characteristic chromatin modification signature associated with transcription elongation in both sense and antisense directions
Creators: name: Jangid, Rahul
name: Ashwin Kelkar
name: Vijaykumar Muley
name: Galande, Sanjeev
Publisher: name: figshare
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Biotechnology
subject: Evolutionary Biology
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Figure S5. H3K27ac distribution on bidirectional gene with different intergenic region in H1 ES cells. The figure shows enrichment of H3K27ac at the bidirectional genes pairs with intergenic distance up to 1000 bp. Intergenic distance is represented as the number of nucleosomes that could potentially be accommodated. Data are shown for the gene pairs which have intergenic region that could contain 2 to 6 nucleosomes assuming 170 bp length for wrapping around each octamer and inclusive of the 20 bp linker. Cumulative expression is calculated by summation of fold enrichment signal at every location in a 4 Kb window for each category and dividing by the highest value of signal in the respective category as described in ‘Methods’. (A) Cumulative enrichment of H3K27ac on bidirectional genes which are asymmetric with respect to their expression profiles. (B) Cumulative enrichment of H3K27ac on bidirectional genes which are symmetric with respect to their expression profiles. (PDF 1135 kb)
Walking on paper
Creators: name: VAN BIESEN, STEFAAN
Publisher: name: PSIAX: Estudos e Reflexões sobre Desenho e Imagem
Year: 2023

description: O desenho acaba por ser uma competência interessante com impacto indiscutível no trabalho e na investigação. Permitindo-nos perceber o mundo com mais precisão e de uma nova perspetiva, auxilia-nos no registo e memorização de fatos, assumindo-se para além do simples instrumento artístico como mediador que potencia o conhecimento. Desde 1990 que Stefaan Van Biesen faz caminhadas documentadas com desenhos. Uma prática que leva a instalações, maquetes, textos, vídeos e fotografias. O artista considera o ato de caminhar uma espécie de processo de pensamento subjetivo no tecido urbano e na paisagem. Numa primeira abordagem, o desenho parece ser mais considerado uma forma de arte do que uma ferramenta de aprendizagem, mas para cientistas e artistas, o desenho é um instrumento com um impacto indiscutível para o trabalho e a investigação. Para o artista há também evidências de que o talento para desenhar se baseia na precisão com que alguém percepciona o mundo e como isso ajuda a vê-lo melhor. Portanto, cultivar o talento para o desenho pode tornar-se um instrumento essencial para melhorar as habilidades de observação em campos do conhecimento onde o visual é importante. Stefaan van Biesen investiga o espaço humano, principalmente urbano, com seus muitos passeios amplamente documentados como uma experiência sensorial e filosófica, tratados com carácter científico e estético. Os desenhos são feitos durante as caminhadas ou posteriormente no atelier, como uma reflexão sobre o local que visitou durante essas caminhadas. Os desenhos variam desde esboços a versões mais elaboradas em que tenta relembrar o lugar, a localização, a vegetação e o trajeto. Stefaan van Biesen parte dos sentidos e do corpo como instrumentos de conhecimento, experiência e criatividade. Seu pensamento está de acordo com o nomadismo dos artistas renascentistas que viajaram por toda a Europa. Dürer é um exemplo notável disso. Essas viagens eram projetos de arte, nos quais correntes de pensamentos, desenhos e outros artefactos surgiam do encontro com outras pessoas e culturas. Essas viagens eram, por assim dizer, laboratórios de pensamento. Van Biesen mostra este laboratório. Anotações, artefactos e desenhos ilustram a sua caminhada. Muito do seu trabalho criativo é ativado em intercâmbios e colaborações com outros artistas, cientistas e especialistas de várias disciplinas. A sua obra está em diálogo direto com o meio e o caminhar e resulta da observação urbana e social.
description: PSIAX: Estudos e Reflexões sobre Desenho e Imagem, Vol. 1 N.º #4- 2ª série (2020): Como o andar e o desenhar se cruzam
Generation of Mesoscale Magnetic Fields and the Dynamics of Cosmic Ray Acceleration
Creators: name: Diamond, P. H.
name: Malkov, M. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The problem of the cosmic ray origin is discussed in connection with their acceleration in supernova remnant shocks. The diffusive shock acceleration mechanism is reviewed and its potential to accelerate particles to the maximum energy of (presumably) galactic cosmic rays ($10^{18}eV $) is considered. It is argued that to reach such energies, a strong magnetic field at scales larger than the particle gyroradius must be created as a result of the acceleration process, itself. One specific mechanism suggested here is based on the generation of Alfven wave at the gyroradius scale with a subsequent transfer to longer scales via interaction with strong acoustic turbulence in the shock precursor. The acoustic turbulence in turn, may be generated by Drury instability or by parametric instability of the Alfven waves.
description: 12 pages, 2 figures, invited talk, International Toki Conference on Plasma Physics and Controlled Nuclear Fusion
As Ações de Praga: desenhar, caminhar e o corpo que narra
Creators: name: ARAÚJO, FÁBIO
name: ALMEIDA, PAULO LUÍS
Publisher: name: PSIAX: Estudos e Reflexões sobre Desenho e Imagem
Year: 2023

description: Este artigo explora o gesto de caminhar como potenciador de uma performance de reconhecimento e confronto com a história e geografia de uma cidade. Investiga-se a caracterização deste gesto através do desenho, em particular no recurso ao storyboard como estratégia protocolar e documental de uma ação. O artigo é escrito na dupla perspetiva de um desenhador que caminha e de um investigador que observa e acompanha os resultados dessa ação. O gesto de caminhar é pensado como uma técnica do corpo, na aceção de Marcel Mauss, e gesto produtor de espaço e tempo, onde as narrativas performativas se formulam. O artigo explora a relação entre o gesto de caminhar e o conceito geográfico de Throwntogetherness de Doreen Massey, na caracterização da cidade como um lugar de convergências de trajetórias não relacionadas, e o desenho como estratégia de documentação dessas trajetórias.
description: PSIAX: Estudos e Reflexões sobre Desenho e Imagem, Vol. 1 N.º #4- 2ª série (2020): Como o andar e o desenhar se cruzam
Mixed measurements and the detection of phase synchronization in networks
Creators: name: Portes, Leonardo L.
name: Aguirre, Luis A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Multivariate singular spectrum analysis (M-SSA), with a varimax rotation of eigenvectors, was recently proposed to provide detailed information about phase synchronization in networks of nonlinear oscillators without any a priori need for phase estimation. The discriminatory power of M-SSA is often enhanced by using only the time series of the variable that provides the best observability of the node dynamics. In practice, however, diverse factors could prevent one to have access to this variable in some nodes and other variables should be used, resulting in a mixed set of variables. In the present work, the impact of this mixed measurement approach on the M-SSA is numerically investigated in networks of Rössler systems and cord oscillators. The results are threefold. First, a node measured by a poor variable, in terms of observability, becomes virtually invisible to the technique. Second, a side effect of using a poor variable is that the characterization of phase synchronization clustering of the {\it other}\, nodes is hindered by a small amount. This suggests that, given a network, synchronization analysis with M-SSA could be more reliable by not measuring those nodes that are accessible only through poor variables. Third, global phase synchronization could be detected even using only poor variables, given enough of them are measured. These insights could be useful in defining measurement strategies for both experimental design and real world applications for use with M-SSA.
description: 22 pages, 9 figures
Additional file 1: of Cliniciansâ attitude towards a placebo-controlled randomised clinical trial investigating the effect of neuraminidase inhibitors in adults hospitalised with influenza
Creators: name: Bradbury, Naomi
name: Nguyen-Van-Tam, Jonathan
name: Lim, Wei
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Pharmacology
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: 60506 Virology
subject: FOS: Biological sciences

description: Appendix â Survey Questions, Survey Questions, Survey questions sent to clinicians. (PDF 56Â kb)