cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Image2SSM: Reimagining Statistical Shape Models from Images with Radial Basis Functions
Creators: name: Xu, Hong
name: Elhabian, Shireen Y.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Statistical shape modeling (SSM) is an essential tool for analyzing variations in anatomical morphology. In a typical SSM pipeline, 3D anatomical images, gone through segmentation and rigid registration, are represented using lower-dimensional shape features, on which statistical analysis can be performed. Various methods for constructing compact shape representations have been proposed, but they involve laborious and costly steps. We propose Image2SSM, a novel deep-learning-based approach for SSM that leverages image-segmentation pairs to learn a radial-basis-function (RBF)-based representation of shapes directly from images. This RBF-based shape representation offers a rich self-supervised signal for the network to estimate a continuous, yet compact representation of the underlying surface that can adapt to complex geometries in a data-driven manner. Image2SSM can characterize populations of biological structures of interest by constructing statistical landmark-based shape models of ensembles of anatomical shapes while requiring minimal parameter tuning and no user assistance. Once trained, Image2SSM can be used to infer low-dimensional shape representations from new unsegmented images, paving the way toward scalable approaches for SSM, especially when dealing with large cohorts. Experiments on synthetic and real datasets show the efficacy of the proposed method compared to the state-of-art correspondence-based method for SSM.
Supplementary Material from Frequency-dependant shifts in song-preference may decrease fitness costs associated with reduced bird song complexity
Creators: name: Appleby, Daniel
name: Langmore, Naomi
name: Heinsohn, Robert
name: Crates, Ross
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310901
subject: Animal behaviour

description: Supplementary Material .docx
Baryon Acoustic Oscillations in the projected cross-correlation function between the eBOSS DR16 quasars and photometric galaxies from the DESI Legacy Imaging Surveys
Creators: name: Zarrouk, Pauline
name: Rezaie, Mehdi
name: Raichoor, Anand
name: Ross, Ashley J.
name: Alam, Shadab
name: Blum, Robert
name: Brookes, David
name: Chuang, Chia-Hsun
name: Cole, Shaun
name: Dawson, Kyle S.
name: Eisenstein, Daniel J.
name: Kehoe, Robert
name: Landriau, Martin
name: Moustakas, John
name: Myers, Adam D.
name: Norberg, Peder
name: Percival, Will J.
name: Prada, Francisco
name: Schubnell, Michael
name: Seo, Hee-Jong
name: Tarlé, Gregory
name: Zhao, Cheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We search for the Baryon Acoustic Oscillations in the projected cross-correlation function binned into transverse comoving radius between the SDSS-IV DR16 eBOSS quasars and a dense photometric sample of galaxies selected from the DESI Legacy Imaging Surveys. We estimate the density of the photometric sample of galaxies in this redshift range to be about 2900 deg$^{-2}$, which is deeper than the official DESI ELG selection, and the density of the spectroscopic sample is about 20 deg$^{-2}$. In order to mitigate the systematics related to the use of different imaging surveys close to the detection limit, we use a neural network approach that accounts for complex dependencies between the imaging attributes and the observed galaxy density. We find that we are limited by the depth of the imaging surveys which affects the density and purity of the photometric sample and its overlap in redshift with the quasar sample, which thus affects the performance of the method. When cross-correlating the photometric galaxies with quasars in $0.6 \leq z \leq 1.2$, the cross-correlation function can provide better constraints on the comoving angular distance, $D_{\rm M}$ (6\% precision) compared to the constraint on the spherically-averaged distance $D_{\rm V}$ (9\% precision) obtained from the auto-correlation. Although not yet competitive, this technique will benefit from the arrival of deeper photometric data from upcoming surveys which will enable it to go beyond the current limitations we have identified in this work.
description: 21 pages, 25 figures
On a Blaschke-Santaló-type inequality for $r$-ball bodies
Creators: name: Bezdek, Károly
Publisher: name: arXiv
Year: 2023
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Let ${\mathbb E}^d$ denote the $d$-dimensional Euclidean space. The $r$-ball body generated by a given set in ${\mathbb E}^d$ is the intersection of balls of radius $r$ centered at the points of the given set. The author [Discrete Optimization 44/1 (2022), Paper No. 100539] proved the following Blaschke-Santaló-type inequality for $r$-ball bodies: for all $0
description: 5 pages. arXiv admin note: text overlap with arXiv:1810.11886
การจัดกิจกรรมการเรียนรู้ วิชาการกำจัดขยะมูลฝอยและสิ่งปฏิกูล ด้วยรูปแบบการเรียนรู้ โดยใช้ปัญหาเป็นฐาน
Creators: name: อาภาพรรณ สัตยาวิบูล
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: กิจกรรมการเรียนรู้,การเรียนรู้โดยใช้ปัญหาเป็นฐาน

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
On a stochastic version of Prouse model in fluid dynamics
Creators: name: Ferrario, B.
name: Flandoli, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 76M35 (Primary), 76F55, 76D06, 76D03, 35Q35 (Secondary)

description: A stochastic version of a modified Navier-Stokes equation (introduced by Prouse) is considered in a 3-dimensional torus. We prove existence and uniqueness of martingale solutions. A different model with the non linearity given by a power 5 of the velocity is analyzed; for the structure function of this model, some insights towards an expression similar to that obtained by the Kolmogorov 1941 theory of turbulence are presented.
description: 31 pages
3D modeling of a Superconducting Dynamo-Type Flux Pump
Creators: name: Ghabeli, Asef
name: Pardo, Enric
name: Kapolka, Milan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: High temperature superconducting (HTS) dynamos are promising devices that can inject large DC currents into the winding of superconducting machines or magnets in a contactless way. Thanks to this, troublesome brushes in HTS machines or bulky currents leads with high thermal losses will be no longer required. The working mechanism of HTS dynamo has been controversial during the recent years and several explanations and models have been proposed to elucidate its performance. In this paper, we present the first three-dimensional (3D) model of an HTS flux pump, which has good agreement with experiments. This model can be beneficial to clarify the mechanism of the dynamo and pinpoint its unnoticed characteristics. Employing this model, we delved into the screening current and electric field distribution across the tape surface in several crucial time steps. This is important, since the overcritical screening current has been shown to be the reason for flux pumping. In addition, we analyzed the impact of both components of electric field and screening current on voltage generation, which was not possible in previous 2D modeling. We also explored the necessary distance of voltage tab at different airgaps for precise measurement of the voltage across the tape in the dynamo.
description: 20 pages; 9 figures; style and minor changes from v01
High-ability students’ conceptions of the fairness of cooperative learning practices
Creators: name: Mallett, Doris
Publisher: name: University of British Columbia
Year: 2009

description: This study was an investigation of high-ability students' conceptions of the fairness of common cooperative learning practices as compared to their average-ability peers. The sample consisted of sixty children in grades four, five, and seven (i.e., twenty-three subjects enrolled in a pull-out gifted/talented enrichment program and the remainder nonparticipants in the pull-out program). It was hypothesized that, overall, high-ability students would endorse as most fair common cooperative learning practices involving heterogeneous groupings over acceleration and enrichment cooperative learning practices. In addition, they would indicate a preference for a cooperative learning practice involving a controversial issue and select as more fair the cooperative learning practice allowing students to choose their own groups over the teacher assigning students to groups. In addition, i t was hypothesized that students' choices and justifications for those choices would reveal cognitive- developmental differences between the grades; however, there would not be significant differences between ability groups. Separate multivariate analyses of variance were conducted with 1) choice of fair practice and 2) issues raised when justifying choices as the dependent variables to determine if there were any main effects relating to grade or ability group, or any interactions of these effects. Main effects for grade were indicated for practices only. No effects were indicated for ability group nor were there any interactions between grade and group. A comparison of the group means revealed that, overall, high-ability students chose the mixed-ability cooperative learning practice involving a controversial issue over acceleration and enrichment cooperative learning practices. However, high-ability students at different grade levels ranked the five practices differently. Although no significant differences existed in choices between the students in both groups, there were differences in the order in which each group rated the fairness of the practices at each grade level. Issues discussed by students in both groups when justifying their choices of fair practices were generally in the equality and equity of work domains, followed by benefits of cooperative learning. Overall, there was evidence that offering high-ability students a controversial topic enhanced their desire to work in mixed-ability groupings within the regular classroom.
A class of Calogero type reductions of free motion on a simple Lie group
Creators: name: Feher, L.
name: Pusztai, B. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 37J35, 53D20, 17B80, 70G65

description: The reductions of the free geodesic motion on a non-compact simple Lie group G based on the $G_+ \times G_+$ symmetry given by left- and right multiplications for a maximal compact subgroup $G_+ \subset G$ are investigated. At generic values of the momentum map this leads to (new) spin Calogero type models. At some special values the `spin' degrees of freedom are absent and we obtain the standard $BC_n$ Sutherland model with three independent coupling constants from SU(n+1,n) and from SU(n,n). This generalization of the Olshanetsky-Perelomov derivation of the $BC_n$ model with two independent coupling constants from the geodesics on $G/G_+$ with G=SU(n+1,n) relies on fixing the right-handed momentum to a non-zero character of $G_+$. The reductions considered permit further generalizations and work at the quantized level, too, for non-compact as well as for compact G.
description: shortened to 13 pages in v2 on request of Lett. Math. Phys. and corrected some spelling errors
Skyrme-HFB Calculations in Coordinate Space for the Krypton Isotopes Up to the Two-Neutron Dripline
Creators: name: Oberacker, V. E.
name: Blazkiewicz, A.
name: Umar, A. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: For axially symmetric even-even nuclei, we solve the Hartree-Fock-Bogoliubov (HFB) equations on a 2-D grid in cylindrical coordinates. The Skyrme SLy4 interaction is used for the mean field and a zero-range interaction for the pairing field. After decoupling the HFB lattice equations, we obtain quasiparticle states with equivalent single-particle energies up to 100 MeV or more. We present results for the Krypton isotope chain up to the two-neutron dripline, including two-neutron separation energies, pairing gaps, and quadrupole deformations for the ground states and isomeric minima.
description: 11 pages, 3 figures; invited manuscript, special issue of Romanian Reports in Physics
การศึกษาคุณภาพน้ำและความหลากหลายชนิดของโปรโตซัวในแม่น้ำเจ้าพระยา จังหวัดนนทบุรี
Creators: name: ยุวรัตน์ ปรมีศนาภรณ์
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2553
Subjects: ความหลากหลายชนิด,คุณภาพน้ำ,โปรโตซัว,แม่น้ำเจ้าพระยา

description: 1, 3, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Cosmological parameters from Galaxy Clusters: an Introduction
Creators: name: Tozzi, Paolo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This lecture is an introduction to cosmological tests with clusters of galaxies. Here I do not intend to provide a complete review of the subject, but rather to describe the basic procedures to set up the fitting machinery to constrain cosmological parameters from clusters, and to show how to handle data with a critical insight. I will focus mainly on the properties of X-ray clusters of galaxies, showing their success as cosmological tools, to end up discussing the complex thermodynamics of the diffuse intracluster medium and its impact on the cosmological tests.
description: 32 pages, 16 figures, conference proceedings for the 3rd Aegean Summer School, Chios, 26 September - 1 October, 2005
Exposome Boot Camp Keynote: Environmental Cheminformatics to Identify Unknown Chemicals and their Effects
Creators: name: Schymanski, Emma
Publisher: name: Zenodo
Year: 2019
Subjects: Exposome
Environmental
Cheminformatics
HR-MS

description: Keynote lecture for the Exposome Boot Camp: https://www.mailman.columbia.edu/research/precision-prevention/exposome-boot-camp-measuring-exposures-omic-scale
Shape changes in the mirror nuclei $^{70}$Kr and $^{70}$Se
Creators: name: Wimmer, K.
name: Korten, W.
name: Doornenbal, P.
name: Arici, T.
name: Aguilera, P.
name: Algora, A.
name: Ando, T.
name: Baba, H.
name: Blank, B.
name: Boso, A.
name: Chen, S.
name: Corsi, A.
name: Davies, P.
name: de Angelis, G.
name: de France, G.
name: Delaroche, J. -P.
name: Doherty, D. T.
name: Gerl, J.
name: Gernhäuser, R.
name: Girod, M.
name: Jenkins, D.
name: Koyama, S.
name: Motobayashi, T.
name: Nagamine, S.
name: Niikura, M.
name: Obertelli, A.
name: Libert, J.
name: Lubos, D.
name: Rodríguez, T. R.
name: Rubio, B.
name: Sahin, E.
name: Saito, T. Y.
name: Sakurai, H.
name: Sinclair, L.
name: Steppenbeck, D.
name: Taniuchi, R.
name: Wadsworth, R.
name: Zielinska, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We studied the proton-rich $T_z=-1$ nucleus $^{70}$Kr through inelastic scattering at intermediate energies in order to extract the reduced transition probability, $B(E2;\;0^+ \rightarrow 2^+)$. Comparison with the other members of the $A=70$ isospin triplet, $^{70}$Br and $^{70}$Se, studied in the same experiment, shows a $3σ$ deviation from the expected linearity of the electromagnetic matrix elements as a function of $T_z$. At present, no established nuclear structure theory can describe this observed deviation quantitatively. This is the first violation of isospin symmetry at this level observed in the transition matrix elements. A heuristic approach may explain the anomaly by a shape change between the mirror nuclei $^{70}$Kr and $^{70}$Se contrary to the model predictions.
description: accepted PRL
Guiding Center Derivation of the Generalized Hasegawa-Mima Equation for Drift Wave Turbulence in Curved Magnetic Fields
Creators: name: Sato, Naoki
name: Yamada, Michio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Recently, a generalized Hasegawa-Mima (gHM) equation describing drift wave turbulence in curved magnetic fields has been derived in [N. Sato and M. Yamada, J. Plasma Phys. (2022), vol. 88, 905880319] for an ion-electron plasma modeled as a two-fluid system. In this work, we show that a mathematically equivalent GHM equation can be obtained within the kinetic framework of guiding center motion, and that the relevant drift wave turbulence ordering can be further relaxed, effectively generalizing the applicability of the equation to any magnetic field geometry and electron spatial density, in the sense that no ordering requirements involve spatial derivatives of the magnetic field or the electron spatial density.
description: 13 pages, 5 tables
Electrostatic attraction between cationic-anionic assemblies with surface compositional heterogeneities
Creators: name: Velichko, Y. S.
name: de la Cruz, M. Olvera
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Electrostatics plays a key role in biomolecular assembly. Oppositely charged biomolecules, for instance, can co-assembled into functional units, such as DNA and histone proteins into nucleosomes and actin-binding protein complexes into cytoskeleton components, at appropriate ionic conditions. These cationic-anionic co-assemblies often have surface charge heterogeneities that result from the delicate balance between electrostatics and packing constraints. Despite their importance, the precise role of surface charge heterogeneities in the organization of cationic-anionic co-assemblies is not well understood. We show here that co-assemblies with charge heterogeneities strongly interact through polarization of the domains. We find that this leads to symmetry breaking, which is important for functional capabilities, and structural changes, which is crucial in the organization of co-assemblies. We determine the range and strength of the attraction as a function of the competition between the steric and hydrophobic constraints and electrostatic interactions.
description: JCP June/2006
Ανάλυση, Βελτιστοποίηση και Εφαρμογές OFDM Συστημάτων Μονής Εσόδου και Μονής ή Πολλαπλών Εξόδων:
Creators: name: Γκουλεμές, Βασίλειος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ορθογωνική πολυπλεξία με διαίρεση συχνότητας
Ασύρματα δίκτυα
Διασυμβολική παρεμβολή
Orthogonal frequency division multiplexing
Wireless networks
Inter-symbol interference

description: Η ορθογωνική πολυπλεξία με διαίρεση συχνότητας (OFDM) είναι μια τεχνική η οποία επιτρέπει την μετάδοση δεδομένων με μεγάλους ρυθμούς και μικρή διασυμβολική παρεμβολή (ISI). Για τον λόγο αυτό η τεχνική είναι ευρέως χρησιμοποιούμενη σε σύγχρονα συστήματα επικοινωνιών αλλά και προβλέπεται να χρησιμοποιηθεί και σε μελλοντικά. Με την χρήση μιας μεθοδολογίας υπολογισμού του BER σαν συνάρτηση του SNR ενός συστήματος OFDM κατασκευάζεται ένας αλγόριθμος υπολογισμού που ελέγχεται με ορισμένες παραμέτρους. Οι παράμετροι είναι: η παραμένουσα απόκλιση συχνότητας φέρουσας, ο λόγος απόρριψης εικόνας IRR, ο συντελεστής αυτοσυσχέτισης, ο αριθμός των διαμορφωμένων υποφερουσών και το μήκος του FFT ενός συστήματος. Επιπλέον παράμετρο του συστήματος αποτελεί και το χρησιμοποιούμενο κανάλι, καθώς μπορεί να επιλεγεί αν θα είναι SISO ή SIMO. Με την χρήση του αλγορίθμου παράγονται αποτελέσματα τα οποία συνδέουν την μεταβολή της κάθε παραμέτρου με την αντίστοιχη μεταβολή της τιμής του BER για κάθε τιμή του SNR. Τα αποτελέσματα αυτά μπορούν να χρησιμοποιηθούν για βελτιστοποίηση συστημάτων OFDM.
description: The orthogonal frequency division multiplexing (OFDM) is a technique that allows data transmission in a very high rate and with low inter-symbol interference (ISI). For that reason this technique is widely used in modern communication systems and, also, is expected to be utilized in future applications. Using a methodology to compute the BER, of an OFDM system, versus the SNR it is possible to implement an algorithm that can be controlled by a number of various parameters. These parameters are: the residual carrier frequency offset, the image rejection ratio IRR, the autocorrelation coefficient, the number of the modulated subcarriers and the length of the FFT of the system. Also, another parameter can be the cannel over which the signal is transmitted. That can be chosen between two different types of channels, which are the SISO and SIMO channels. The results that can be produced with the use of the algorithm can connect the variation of a parameter with the corresponding variation to the value of the BER for a certain value of the SNR. These results can be used for the optimization of OFDM systems.
Hamiltonian Structure and Nonlinear Stability of Steady Solutions of the Generalized Hasegawa-Mima Equation for Drift Wave Turbulence in Curved Magnetic Fields
Creators: name: Sato, Naoki
name: Yamada, Michio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Generalized Hasegawa-Mima (GHM) equation, which generalizes the standard Hasegawa-Mima (HM) equation, is a nonlinear equation describing the evolution of drift wave turbulence in curved magnetic fields. The GHM equation can be obtained from a drift wave turbulence ordering that does not involve ordering conditions on spatial derivatives of the magnetic field or the plasma density, and it is therefore appropriate to describe the evolution of electrostatic turbulence in strongly inhomogeneous magnetized plasmas. In this work, we discuss the noncanonical Hamiltonian structure of the GHM equation, and obtain conditions for the nonlinear stability of steady solutions through the energy-Casimir stability criterion. These results are then applied to describe drift waves and infer the existence of stable toroidal zonal flows with radial shear in dipole magnetic fields.
description: 14 pages, 5 tables
E_7 and the tripartite entanglement of seven qubits
Creators: name: Duff, M. J.
name: Ferrara, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In quantum information theory, it is well known that the tripartite entanglement of three qubits is described by the group [SL(2,C)]^3 and that the entanglement measure is given by Cayley's hyperdeterminant. This has provided an analogy with certain N=2 supersymmetric black holes in string theory, whose entropy is also given by the hyperdeterminant. In this paper, we extend the analogy to N=8. We propose that a particular tripartite entanglement of seven qubits, encoded in the Fano plane, is described by the exceptional group E_7(C) and that the entanglement measure is given by Cartan's quartic E_7 invariant.
description: Minor improvements. 15 page latex
The search for inner polar disks with integral field spectroscopy: the case of NGC 2855 and NGC 7049
Creators: name: Coccato, L.
name: Corsini, E. M.
name: Pizzella, A.
name: Bertola, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The presence of non-circular and off-plane gas motions is frequently observed in the inner regions of disk galaxies. We have measured with integral-field spectroscopy the surface-brightness distribution and kinematics of the ionized gas in NGC 2855 and NGC 7049. These two early-type spiral galaxies were selected to possibly host a kinematically-decoupled gaseous component in orthogonal rotation with respect to the galaxy disk. We have modeled the ionized-gas kinematics and distribution of both galaxies assuming that the gaseous component is distributed either on two orthogonally-rotating disks or in a single and strongly warped disk. In both galaxies the velocity field and distribution of the inner gas are consistent with the presence of an inner polar disk. In NGC 2855 it correponds to the innermost and strongly warped portion of the main disk. In NGC 7049 it is a central and geometrically-decoupled disk, which is nested in the main disk.
description: Accepted for pubblication in A&A
The collision frequencies in the plasmas with the power-law q-distributions in nonextensive statistics
Creators: name: Wang, Yue
name: Du, Jiulin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We study the collision frequencies of particles in the weakly and highly ionized plasmas with the power-law q-distributions in nonextensive statistics. We derive the average collision frequencies of neutral-neutral particle, electron-neutral particle, ion-neutral particle, electron-electron, ion-ion and electron-ion, respectively, in the q-distributed plasmas. We show that the average collision frequencies depend strongly on the q-parameter in a complex form and thus their properties are significantly different from that in Maxwell-distributed plasmas. These new average collision frequencies are important for us to study accurately the transport property in the complex plasmas with non-Maxwell/power-law velocity distributions.
description: 19 pages,3 figures,45 references
Normalleşen Vital Değerler Pulmoner Emboli Olasılığını Azaltır mı?
Creators: name: Erkman Sanrı
Publisher: name: Zenodo
Year: 2017

description: Pulmoner Emboli (PTE) şüphesi ile acil serviste takip edilen hastaların pulmoner emboli tanısı almaları genellikle birkaç saat sürmektedir. Bu takip süreci içerisinde acil servis hekimleri sürekli hasta ile ilgili yeni bilgiler edinmektedir. Bu bilgiler bazen mevcut anamnezin üzerine eklenen yeni anamnez bilgisi, bazen takip sürecindeki fizik muayene değişiklikleri, bazen ise yine takip esnasındaki güncel vital değer bilgileridir. Bu bilgiler ışığında hastayı takip eden acil servis hekiminin, hastanın pulmoner emboli olması ile alakalı kanaati kuvvetlenmekte veya zayıflamaktadır. Nabız, solunum sayısı (SS), tansiyon (TA), oksijen satürasyonu (O2sat) ve şok indeksi (nbz/STA) gibi değerler, bu süreçte en sık kullanılan ve yazılı literatürde yerini bulabilmiş olan vital parametrelerdir1234. Birçok klinisyen (bazen farkında olmadan);pulmoner emboli tanısı alabilecek olan hastada, başlangıç pre-test olasılık değerlendirmesini vital değerlerle yapmaktadır. Çünkü eğer bu mevcut veriler klinisyenin ön tanıları arasına pulmoner emboliyi sokacak şüpheyi oluşturmazsa, bu hastalarda pulmoner emboli tanısı için gerekli tanı yöntemleri kullanılmayacak ve hastada pulmoner emboli tanısı (eğer var ise) gözden kaçacaktır
Quantum Monte Carlo scheme for frustrated Heisenberg antiferromagnets
Creators: name: Wojtkiewicz, Jacek
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: When one tries to simulate quantum spin systems by the Monte Carlo method, often the 'minus-sign problem' is encountered. In such a case, an application of probabilistic methods is not possible. In this paper the method has been proposed how to avoid the minus sign problem for certain class of frustrated Heisenberg models. The systems where this method is applicable are, for instance, the pyrochlore lattice and the $J_1-J_2$ Heisenberg model. The method works in singlet sector. It relies on expression of wave functions in dimer (pseudo)basis and writing down the Hamiltonian as a sum over plaquettes. In such a formulation, matrix elements of the exponent of Hamiltonian are positive.
description: 19 LaTeX pages, 6 figures, 1 table
Embedding Inequalities for Barron-type Spaces
Creators: name: Wu, Lei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 68T07

description: An important problem in machine learning theory is to understand the approximation and generalization properties of two-layer neural networks in high dimensions. To this end, researchers have introduced the Barron space $\mathcal{B}_s(Ω)$ and the spectral Barron space $\mathcal{F}_s(Ω)$, where the index $s\in [0,\infty)$ indicates the smoothness of functions within these spaces and $Ω\subset\mathbb{R}^d$ denotes the input domain. However, the precise relationship between the two types of Barron spaces remains unclear. In this paper, we establish a continuous embedding between them as implied by the following inequality: for any $δ\in (0,1), s\in \mathbb{N}^{+}$ and $f: Ω\mapsto\mathbb{R}$, it holds that \[ δ\|f\|_{\mathcal{F}_{s-δ}(Ω)}\lesssim_s \|f\|_{\mathcal{B}_s(Ω)}\lesssim_s \|f\|_{\mathcal{F}_{s+1}(Ω)}. \]
 Importantly, the constants do not depend on the input dimension $d$, suggesting that the embedding is effective in high dimensions. Moreover, we also show that the lower and upper bound are both tight.
description: 11 pages
การศึกษาจิตรกรรมฝาผนังพระอุโบสถวัดกลางวรวิหารจังหวัดสมุทรปราการ
Creators: name: เนื้ออ่อน ขรัวทองเขียว
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2552
Subjects: จิตรกรรมฝาผนัง,วัดกลางวรวิหาร,จังหวัดสมุทรปราการ

description: 2, 5, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
การประเมินผลโครงการกองทุนหมู่บ้านและชุมชนเมืองในจังหวัดเชียงใหม่
Creators: name: สิริรัฐ สุกันธา
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2552
Subjects: การประเมินโครงการ,กองทุนหมู่บ้านและชุมชนเมือง,เชียงใหม่

description: 2, 5, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Simulation studies of CZT Detectors as Gamma-Ray Calorimeter
Creators: name: Jung, I.
name: Krawczynski, H.
name: Komarov, S.
name: Sobotka, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe the results of detailed 3-D Monte Carlo simulations of a "CZT calorimeter" that can be used to detect photons in the keV to several MeV range. Several astrophysics applications require the detection of photons in the energy range of keV up to several MeV with good position and energy resolution. For certain applications Cadmium Zinc Telluride (CZT) detectors might be the detector option of choice. Up to now, CZT detectors have mainly been used in the energy range between a few keV to ~1 MeV, we describe the results of detailed 3-D Monte Carlo simulations of a "CZT calorimeter" that can be used to detect photons in the keV to several MeV range. The main objective of these studies is to evaluate the feasibility of CZT calorimeters, to study their performance and detect and understand performance limiting factors. Such a calorimeter consists of many layers of closely packed pixellated CZT detector units. Our simulations of single detector units reproduce experimental results, indicating that our simulations capture the main factors that limit the performance of a detector unit. Overall the conclusion of our simulation study is that between 1 cm and 1.5 cm thick detector units can be used to build a calorimeter with good performance over the energy range from ~20 keV to ~10 MeV.
description: Accepted for publication in Astroparticle Physics, 20 pages, 14 figures
SDSS-IV MaNGA: galaxy gas-phase metallicity gradients vary across the mass-size plane
Creators: name: Boardman, Nicholas F.
name: Zasowski, Gail
name: Newman, Jeffrey A.
name: Sanchez, Sebastian F.
name: Schaefer, Adam
name: Lian, Jianhui
name: Bizyaev, Dmitry
name: Drory, Niv
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Gas-phase abundances and abundance gradients provide much information on past stellar generations, and are powerful probes of how galaxies evolve. Gas abundance gradients in galaxies have been studied as functions of galaxies' mass and size individually, but have largely not been considered across the galaxy mass--size plane. Thus, we investigate gas-phase abundance gradients across this plane, using a sample of over 1000 galaxies selected from the MApping Nearby Galaxies at APO (MaNGA) spectroscopic survey. We find that gradients vary systematically such that above $10^{10}M_{\odot}$, smaller galaxies display flatter gradients than larger galaxies at a given stellar mass. This mass--size behaviour cannot be explained by instrumental effects, nor is it simply a reflection of known trends between gradients and morphology. We explore multiple possibilities for a physical origin for this pattern, though further work is needed to establish a firm physical interpretation.
description: 7 pages, 4 figures. Accepted by MNRAS
Orbital-selective Mott transitions in two-band Hubbard models
Creators: name: Blümer, N.
name: Knecht, C.
name: Pozgajcic, K.
name: van Dongen, P. G. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The anisotropic two-orbital Hubbard model is investigated at low temperatures using high-precision quantum Monte Carlo (QMC) simulations within dynamical mean-field theory (DMFT). We demonstrate that two distinct orbital-selective Mott transitions (OSMTs) occur for a bandwidth ratio of 2 even without spin-flip contributions to the Hund exchange, and we quantify numerical errors in earlier QMC data which had obscured the second transition. The limit of small inter-orbital coupling is introduced via a new generalized Hamiltonian and studied using QMC and Potthoff's self-energy functional method, yielding insight into the nature of the OSMTs and the non-Fermi-liquid OSM phase and opening the possibility for a new quantum-critical point.
description: 2 pages, 4 figures, presented at ICM2006 and accepted for JMMM
Mediating Ribosomal Competition by Splitting Pools
Creators: name: Miller, Jared
name: Al-Radhawi, M. Ali
name: Sontag, Eduardo D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Optimization and Control (math.OC)
subject: FOS: Biological sciences
subject: FOS: Mathematics

description: Synthetic biology constructs often rely upon the introduction of "circuit" genes into host cells, in order to express novel proteins and thus endow the host with a desired behavior. The expression of these new genes "consumes" existing resources in the cell, such as ATP, RNA polymerase, amino acids, and ribosomes. Ribosomal competition among strands of mRNA may be described by a system of nonlinear ODEs called the Ribosomal Flow Model (RFM). The competition for resources between host and circuit genes can be ameliorated by splitting the ribosome pool by use of orthogonal ribosomes, where the circuit genes are exclusively translated by mutated ribosomes. In this work, the RFM system is extended to include orthogonal ribosome competition. This Orthogonal Ribosomal Flow Model (ORFM) is proven to be stable through the use of Robust Lyapunov Functions. The optimization problem of maximizing the weighted protein translation rate by adjusting allocation of ribosomal species is formulated and implemented.
การศึกษาพฤติกรรมการใช้เทคโนโลยีสารสนเทศและการสื่อสารเพื่อการศึกษาของนักศึกษามหาวิทยาลัยราชภัฏสวนดุสิต
Creators: name: บุญญลักษณ์ ตำนานจิตร
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2552
Subjects: พฤติกรรมการใช้เทคโนโลยีสารสนเทศและการสื่อสาร,เทคโนโลยีสารสนเทศ

description: 2, 5, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
ผลกระทบจากการดำเนินงานตามแผนชุมชนพึ่งตนเองกรณีศึกษา : ชุมชนต้นแบบในแถบภาคกลาง
Creators: name: เขมภัทท์ เย็นเปี่ยม
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2552
Subjects: ผลกระทบการดำเนินงานตามแผนชุมชนพึ่งตนเอง,ชุมชนต้นแบบ

description: 3, 5, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Symmetry breaking and clustering in a vibrated granular gas with several macroscopically connected compartments
Creators: name: Brey, J. Javier
name: Garcia-Rojo, R.
name: Moreno, F.
name: Ruiz-Montero, M. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The spontaneous symmetry breaking in a vibro-fluidized low-density granular gas in three connected compartments is investigated. When the total number of particles in the system becomes large enough, particles distribute themselves unequally among the three compartments. Particles tend to concentrate in one of the compartments, the other two having the (relatively small) same average number of particles. A hydrodynamical model that accurately predicts the bifurcation diagram of the system is presented. The theory can be easily extended to the case of an arbitrary number of connected compartments.
ABC'den CAB'ye Geçişte Erken Entübasyon
Creators: name: Erkman Sanrı
Publisher: name: Zenodo
Year: 2017

description: Son yıllarda kardiyak arestli hastanın yönetimi algoritmasında güncel kılavuz yaklaşımlarında değişiklikler oldu. Uzun yıllar boyunca klinisyenler, kılavuz önerileri doğrultusunda, havayolunun dolaşıma göre daha öncelikli ve önemli olduğunu düşünmüş ve günlük pratiklerini bu doğrultuda şekillendirmişlerdi. Eskiden, acil serviste, kardiyak arestli bir hasta ile karşılaşıldığında erken entübasyon yapmaya çalışmak ve bu sırada daha önemli olan KPR ve defibrilasyondan ödün vermek birçok hekimin yaptığı bir hata idi. Bu, ABC (havayolu, solunum, dolaşım) olarak bilinen yaklaşımın artık CAB (dolaşım, havayolu, solunum) olarak kullanılmasının önerilmekte olduğu hepinizin malumu. ABC’nin CAB’ye dönüşünü, kardiyak arest yönetiminde dolaşımın daha fazla önem kazanması ve havayolunun eski önemini yitirmesi şeklinde yorumlamak da mümkün. Kılavuz önerileri sonucunda, kardiyak arestli hastalardaki CAB uygulaması artık birçok klinisyenin aşina olduğu ve deneyimlediği bir uygulama haline geldi. C ve A (dolaşım ve havayolu), etkili bir şekilde uygulandığında (yüksek kalitede KPR ve erken defibrillasyon), arest hastalarda, erken dönemde olumlu nörolojik sonuçların gözlendiği uygulamalar. Fizyolojik olarak da düşünecek olursak, etkin dolaşım sağlanması ile koroner ve serebral perfüzyon basıncının artacaktır. Yine etkin havayolu sağlanması ile iskemik dokunun oksijenizasyonu da mümlün olur. Bu nedenle birçok klinisyen göğüs basısı ile birlikte erken havayolu kontrolü için trakeal entübasyonyapmayı tercih etmektedir. Her ne kadar düz mantık gereği erken entübasyonun sağkalımı olumlu etkileyeceğini düşünsek de, hastane öncesi erken entübasyonun incelendiği bazı araştırmalarda, ki aralarında en önemlisi aşağıdaki slaytlarda önemli noktaları verilen Hasegawa ve ark. çalışmasıdır, nörolojik olarak kabül edilebilir sağkalımın erken entübasyon yapılması ile ters orantılı olduğu gösterilmişti.1
Thermodynamics of Warped Anti-de Sitter Black Holes under Scattering of Scalar Field
Creators: name: Gwak, Bogeun
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the thermodynamics and stability of the horizons in warped anti-de Sitter black holes of the new massive gravity under the scattering of a massive scalar field. Under scattering, conserved quantities can be transferred from the scalar field to the black hole, which change the state of the black hole. We determine that the changes in the black hole are well coincident with the laws of thermodynamics. In particular, the Hawking temperature of the black hole cannot be zero in the process as per the third law of thermodynamics. Furthermore, the black hole cannot be overspun beyond the extremal condition under the scattering of any mode of the scalar field.
description: 15 pages, 6 figures
The Taiji-TianQin-LISA network: Precisely measuring the Hubble constant using both bright and dark sirens
Creators: name: Jin, Shang-Jie
name: Zhang, Ye-Zhu
name: Song, Ji-Yu
name: Zhang, Jing-Fei
name: Zhang, Xin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the coming decades, the space-based gravitational-wave (GW) detectors such as Taiji, TianQin, and LISA are expected to form a network capable of detecting millihertz GWs emitted by the mergers of massive black hole binaries (MBHBs). In this work, we investigate the potential of GW standard sirens from the Taiji-TianQin-LISA network in constraining cosmological parameters. For the optimistic scenario in which electromagnetic (EM) counterparts can be detected, we predict the number of detectable bright sirens based on three different MBHB population models, i.e., pop III, Q3d, and Q3nod. Our results show that the Taiji-TianQin-LISA network alone could achieve a constraint precision of $0.9\%$ for the Hubble constant, meeting the standard of precision cosmology. Moreover, the Taiji-TianQin-LISA network could effectively break the cosmological parameter degeneracies generated by the CMB data, particularly in the dynamical dark energy models. When combined with the CMB data, the joint CMB+Taiji-TianQin-LISA data offer $σ(w)=0.036$ in the $w$CDM model, which is close to the latest constraint result obtained from the CMB+SN data. We also consider a conservative scenario in which EM counterparts are not available. Due to the precise sky localizations of MBHBs by the Taiji-TianQin-LISA network, the constraint precision of the Hubble constant is expected to reach $1.2\%$. In conclusion, the GW standard sirens from the Taiji-TianQin-LISA network will play a critical role in helping solve the Hubble tension and shedding light on the nature of dark energy.
description: 22 pages, 10 figures; published in Science China Physics Mechanics & Astronomy
Chaotic dynamics of resting ventilatory flow in humans assessed through noise titration
Creators: name: Wysocki, Marc
name: Fiamma, Marie-Noelle
name: Straus, Christian
name: Poon, Chi-Sang
name: Similowski, Thomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The mammalian ventilatory behavior exhibits nonlinear dynamics as reflected by certain nonlinearity or complexity indicators (e.g. correlation dimension, approximate entropy, Lyapunov exponents...) but this is not sufficient to determine its possible chaotic nature. To address this, we applied the noise titration technique, previously shown to discern and quantify chaos in short and noisy time series, to ventilatory flow recordings obtained in quietly breathing normal humans. Nine subjects (8 men and 1 woman, 24-42 yrs) were studied during 15-minute epochs of ventilatory steady-state (10.1 +/- 3.0 breaths/minute, tidal volume 0.63 +/- 0.2L). Noise titration applied to the unfiltered signals subsampled at 5 Hz detected nonlinearity in all cases (noise limit 20.2 +/- 12.5%). Noise limit values were weakly correlated to the correlation dimension and the largest Lyapunov exponent of the signals. This study shows that the noise titration approach evidences a chaotic dimension to the behavior of ventilatory flow over time in normal humans during tidal breathing.
description: 24 pages, 3 figures, presented at 27th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
การสื่อสารหลักเศรษฐกิจพอเพียงในรายการโทรทัศน์ "โฮมสวีทโฮม (Home Sweet Home)" ของสถานีโทรทัศน์ท้องถิ่นโฮมเคเบิ้ลทีวี จังหวัดอุดรธานี
Creators: name: วัชพร มานะจิตร
Publisher: name: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Year: 2552
Subjects: การสื่อสาร,เศรษฐกิจพอเพียง,รายการโทรทัศน์ "โฮมสวีทโฮม"

description: 3, 5, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Ψηφιακή Επεξεργασία Ακουστικού Σήματος Αναπνοής Αλόγων:
Creators: name: Ντριγκόγια, Παρασκευή Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ψηφιακή επεξεργασία σήματος
Βιοακουστική
Αλγόριθμος εντοπισμού τερματικών ορίων
Digital signal processing
Bioacoustics
End point detection algorithms

description: Το γενικότερο αντικείμενο το οποίο πραγματεύεται η παρούσα εργασία, αφορά την εφαρμογή αλγορίθμων και μεθοδολογιών στην κατάτμηση ηχητικών σημάτων σε ομοιογενείς περιοχές.Ειδικότερα, μελετά την εφαρμογή τεχνικών επεξεργασίας και ανάλυσης σήματος στο πεδίο των βιοακουστικών σημάτων. Είναι γεγονός πως το πεδίο της βιοακουστικής σε συνδυασμό με την εφαρμοσμένη επεξεργασία σήματος, έχει αρχίσει να αναπτύσσεται μόλις τα τελευταία χρόνια. Η αναγνώριση βιοακουστικών σημάτων και η ταυτοποίηση αυτών, μπορεί να βελτιωθεί κατά πολύ αν τα εν λόγω σήματα κατηγοριοποιηθούν σε ομοιογενείς περιοχές με στόχο την εξαγωγή επιμέρους χαρακτηριστικών που θα ωθήσουν προς αυτή την κατεύθυνση. Με σκοπό λοιπόν την κατάτμηση βιοακουστικών σημάτων από αναπνοές εξασκούμενων αλόγων, προτείνουμε τρεις μεθοδολογίες. Οι δύο από αυτές ,βασίζονται στον αλγόριθμο εντοπισμού τερματικών ορίων των Rabiner και Sambur ενώ η τρίτη σε πλήρη αντιπαράθεση αξιοποιεί τις Μηχανές Εδραίων Διανυσμάτων σε μια μη επιβλεπόμενη διαδικασία εκμάθησης. Τα παρουσιαζόμενα πειράματα, δείχνουν την απόδοση της κάθε μίας από τις τρεις προτεινόμενες μεθοδολογίες σε μια εποπτική αναπαράσταση των περιοχών που εντοπίζονται σε επιλεγμένα σήματα από τη βάση. Τέλος, γίνεται μια σύγκριση και αξιολόγηση των μεθόδων που προτείνονται παρουσιάζοντας τα θετικά και αρνητικά στοιχεία της κάθε μιας.
description: This thesis is devoted to the application of speech processing and analysis techniques in bio-acoustic signals recording horse respiration. More specifically, applied signal processing in bioacoustics is studied thoroughly in order to effectively group audio signal samples into separate homogeneous regions. Undoubtedly the combination of bioacoustics and applied signal processing has been active only for the past few years. Bio-acoustic signal recognition and identification can be significantly improved by applying audio segmentation techniques in order to extract features that will possess discriminating capabilities for high level tasks, such as to identify healthy from unhealthy horses by processing an audio signal recording the horse respiration. In the thesis, we are confined to the application of audio segmentation techniques to respiratory signals from exercising horses.We present three methodologies, two of which are based on the end-point detection algorithm proposed by Rabiner and Sambur. The third method applies a scanning window scheme based on Support Vector Machines training error rate for unsupervised audio segmentation. The experimental results demonstrate the performance of each of the proposed methodologies by visualizing the detected regions in selected signals from the database. The three proposed procedures are evaluated, compared, and contrasted, so as to suggest the best among all.