cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A rigidity theorem for quaternionic Kaehler structures
Creators: name: Hattori, Kota
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C26

description: We study the moduli space of quaternionic Kaehler structures on a compact manifold of dimension 4n (n>2) from a point of view of Riemannian geometry, not twistor theory. Then we obtain a rigidity theorem for quaternionic Kaehler structures of nonzero scalar curvature by observing the moduli space.
description: 26pages
title: The Space Plug-and-Play Architecture Services Manager and Its Relevance in Diverse Plug-and-Play Software Systems
Creators: name: Holdaway, Brandon
Publisher: name: Utah State University
Year: 2014

description: The Space Plug-and-Play Archichecture System Manager (SSM) is a system of Space Plug-and-Play Architecture (SPA) hardware, software components, and services for rapid integration of satellite systems. It was originally designed to help decrease the amount of time and money required to integrate payloads onto a satellite. The features of the SSM make it useful in non-satellite systems. In this report, I demonstrate diverse uses of the SSM in a multi-use payload manage- ment and underwater vehicle software solution which was designed and implemented using the SSM. Further I give a detailed explanation of the successes and failures of the software when used in a robotics application. Finally, I conclude with recommended additions to the SSM that would help solve the deciencies found in the underwater vehicle software.
Non-perturbative tests for the Asymptotic Freedom in the $\mathcal{PT}% $-symmetric $(-ϕ^{4})_{3+1}$ theory
Creators: name: Shalaby, Abouzeid
name: Al-Thoyaib, Suleiman S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the literature, the asymptotic freedom property of the $(-ϕ^{4})$ theory is always concluded from real-line calculations while the theory is known to be a non-real-line one. In this article, we test the existence of the asymptotic freedom in the $(-ϕ^{4})_{3+1}$ theory using mean field approach. In this approach and contrary to the original Hamiltonian, the obtained effective Hamiltonian is rather a real-line one. Accordingly, this work resembles the first reasonable analysis for the existence of the asymptotic freedom property in the $\mathcal{PT}$-symmetric $(-ϕ^{4})$ theory. In this respect, we calculated three different amplitudes of different positive dimensions (in mass units) and find that all of them goes to very small values at high energy scales (small coupling) in agreement with the spirit of the asymptotic freedom property of the theory. To test the validity of our calculations, we obtained the asymptotic behavior of the vacuum condensate in terms of the coupling, analytically, and found that the controlling factor $Λ$ has the value $\frac{(4 π)^{2}}{6}= 26. 319$ compared to the result $Λ=26.3209$ from the literature which was obtained via numerical predictions. We assert that the non-blow up of the massive quantities at high energy scales predicted in this work strongly suggests the possibility of the solution of the famous hierarchy puzzle in a standard model with $\mathcal{PT}$-symmetric Higgs mechanism.
description: 18 pages, 3 figures. In this version we obtained the asymptotic behaviour of the condensate, analytically, and corrected some formulas
Bare and Induced Lorentz and CPT Invariance Violations in QED
Creators: name: Alfaro, J.
name: Andrianov, A. A.
name: Cambiaso, M.
name: Giacconi, P.
name: Soldati, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider QED in a constant axial vector background (Æther). Further Lorentz invariance violations (LIV) might occur owing to radiative corrections. The phenomenology of this model is studied, clarifying issues related to the various regularizations employed, with a particular emphasis on the induced photon mass. To this concern, it is shown that in the presence of LIV dimensional regularization may produce a radiatively induced finite photon mass. The possible physical role of the large momentum cutoff is elucidated and the finite temperature radiative corrections are evaluated. Finally, various experimental bounds on the parameters of the model are discussed.
description: latex, 29 pages
title: The Optimal Release of Sterile Males in Pest Management
Creators: name: Ramirez, Sergio
Publisher: name: Utah State University
Year: 2014

description: With an application of the sterile insect technique, it is our goal to know the optimal rate of production of sterile males in order to control an insect pest invasion and protect crops. Starting with a fundametal relationship between costs of production and feeding rates, we construct an objective functional. We then use the relationships between the dierent stages of female reproduction to build the state equations. Once, we have dened the optimal control problem, we use the simulated annealing algorithm to determine the amount of sterile males to be released at each discrete time event. Multiple calculations are made with dierent release schedules.
CFT adapted gauge invariant formulation of massive arbitrary spin fields in AdS
Creators: name: Metsaev, R. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using Poincare parametrization of AdS space, we study massive totally symmetric arbitrary spin fields in AdS space of dimension greater than or equal to four. CFT adapted gauge invariant formulation for such fields is developed. Gauge symmetries are realized by using Stueckelberg formulation of massive fields. We demonstrate that the mass parameter, curvature and radial coordinate contributions to the gauge transformation and Lagrangian of the AdS massive fields can be expressed in terms of ladder operators. Three representations for the Lagrangian are discussed. Realization of the global AdS symmetries in the conformal algebra basis is obtained. Modified de Donder gauge leading to simple gauge fixed Lagrangian is found. The modified de Donder gauge leads to decoupled equations of motion which can easily be solved in terms of the Bessel function. New simple representation for gauge invariant Lagrangian of massive (A)dS field in arbitrary coordinates is obtained. Light-cone gauge Lagrangian of massive AdS field is also presented.
description: 14 pages, LaTeX-2e. v3: Typo corrected in 2nd line below Eq.(4.34)
The Symmetry of the Boron Buckyball and a Related Boron Nanotube
Creators: name: Szwacki, N. Gonzalez
name: Tymczak, C. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the symmetry of the boron buckyball and a related boron nanotube. Using large-scale ab-initio calculations up to second-order Møller Plesset perturbation theory, we have determined unambiguously the equilibrium geometry/symmetry of two structurally related boron clusters: the B80 fullerene and the finite-length (5,0) boron nanotube. The B80 cluster was found to have the same symmetry, Ih, as the C60 molecule since its 20 additional boron atoms are located exactly at the centers of the 20 hexagons. Additionally, we also show that the (5,0) boron nanotube does not suffer from atomic buckling and its symmetry is D5d instead of C5v as has been described by previous calculations. Therefore, we predict that all the boron nanotubes rolled from the α-sheet will be free from structural distortions, which has a significant impact on their electronic properties.
description: 4 pages, 3 figures
Adenosine and Vascular Homeostasis
Creators: name: Simard, Trevor
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: adenosine
dipyridamole
in-stent restenosis
optical coherence tomography
neointima
smooth muscle cells

description: Despite advancements in percutaneous coronary intervention, stents are still limited by a 2% annual rate of in-stent restenosis (ISR) related to neointimal (NI) tissue proliferation. Efforts to prevent ISR formation remain the focus of ongoing work. Adenosine (ADO) is a purine nucleoside with integral roles in vascular homeostasis, though it has limited clinical application. ADO signals primarily via four receptors with ADO receptor-A2B (ADOR-A2B) considered to play an integral role in vascular healing. Dipyridamole (DP) is a commercially approved therapy known to improve vascular events and modulate adenosine biology. Our objectives with this study included (i) assessing whether ADO could serve as a biomarker of cardiac events; (ii) determine if DP could mitigate NI formation in a pre-clinical stent model; and, (iii) quantify the mechanisms of DP-related vasculoprotection, specifically related to ADOR-A2B. We assessed the analytic and biologic variability of circulating ADO levels in humans and demonstrated that circulating ADO was not predictive of cardiac events at one year following invasive coronary angiography. We then assessed whether modulation of adenosine biology with DP had therapeutic efficacy in a pre-clinical model. Utilizing meta-analysis, we confirmed the sustained effects of DP on vascular patency rates in both pre-clinical and clinical studies. We refined a pre-clinical rabbit model of stent implantation with assessment of stent healing by intravascular optical coherence tomography – with excellent translation to clinical observations. We then assessed DP in a pre-clinical model, demonstrating reduction in ISR and improved stent healing with DP compared to control. Last, we sought to elucidate the mechanisms behind the observed DP effects, specifically related to ADOR-A2B. In vivo, DP therapy demonstrated reduced NI smooth muscle cell (SMC) content. In vitro assessment of DP demonstrated dose-dependent inhibition of SMC proliferation and migration with alteration of SMC phenotypic switching, while selective modulation of ADOR-A2B and ADOR-A2B knockdown support an ADOR-A2B-mediated component to the observed DP effects. Adenosine biology is integral to vascular homeostasis. In humans, circulating adenosine levels in humans are not predictive of one year cardiovascular events. However, DP may improve vascular healing post stent implantation and warrants clinical evaluation for stent healing. The observed DP benefits may, in part, stem from ADOR-A2B modulation. ADOR-A2B is a viable target for assessment of small molecule modulation as a novel therapeutic target to improve vascular outcomes.
Jack deformations of Plancherel measures and traceless Gaussian random matrices
Creators: name: Matsumoto, Sho
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60C05; 05E10

description: We study random partitions $λ=(λ_1,λ_2,...,λ_d)$ of $n$ whose length is not bigger than a fixed number $d$. Suppose a random partition $λ$ is distributed according to the Jack measure, which is a deformation of the Plancherel measure with a positive parameter $α>0$. We prove that for all $α>0$, in the limit as $n \to \infty$, the joint distribution of scaled $λ_1,..., λ_d$ converges to the joint distribution of some random variables from a traceless Gaussian $β$-ensemble with $β=2/α$. We also give a short proof of Regev's asymptotic theorem for the sum of $β$-powers of $f^λ$, the number of standard tableaux of shape $λ$.
description: 18 pages
Circular edge-colorings of cubic graphs with girth six
Creators: name: Král', D.
name: Mácajová, E.
name: Mazák, J.
name: Sereni, J. -S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: We show that the circular chromatic index of a (sub)cubic graph with girth at least six is at most 7/2.
description: 13 pages, 6 figures
title: Evaluation of the Long Term Effectiveness of the Nutrition Component of the Fit Kids of Arizona Program
Creators: name: Dastrup, Megann
Publisher: name: Utah State University
Year: 2014

description: The Fit Kids of Arizona program was created in 2009 to combat the childhood obesity epidemic in Northern Arizona. Fit Kids has been providing health education to overweight children and their families for the past five years. Research to validate the programs efforts has been lacking. This study aimed to evaluate the long-term effectiveness of the nutrition component of the Fit Kids of Arizona program. The study also aimed to analyze the changes in BMI percentile after program participation and to obtain program satisfaction comments from past participants. Through the research process it was realized that the data collection and storage methods currently used by Fit Kids are inconsistent and do currently not help facilitate research. The research project evolved to include a protocol on what Fit Kids of Arizona can do to collect and store patient data in a manner that facilitates future research and program sustainability.
Roberge-Weiss phase transition and its endpoint
Creators: name: Kouno, Hiroaki
name: Sakai, Yuji
name: Kashiwa, Kouji
name: Yahiro, Masanobu
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Roberge-Weiss (RW) phase transition in the imaginary chemical potential region is analyzed by the Polyakov-loop extended Nambu--Jona-Lasinio (PNJL) model. In the RW phase transition, the charge-conjugation symmetry is spontaneously broken, while the extended Z3 symmetry (the RW periodicity) is preserved. The RW transition is of second order at the endpoint. At the zero chemical potential, a crossover deconfinement transition appears as a remnant of the second-order RW phase transition at the endpoint, while the charge-conjugation symmetry is always preserved.
description: 24 pages, 19 figures. Journal version. Some sentences have been revised and added. Fig. 9 has been revised. (New panels have been added.)
Induced fermionic current densities by magnetic flux in higher dimensional cosmic string spacetime
Creators: name: de Mello, E. R. Bezerra
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we analyse the vacuum fluctuations of quantum fermionic current densities, $$, induced by a magnetic flux running along the core of the conical space produced by the presence of cosmic string, in a $(1+d)-$dimensional bulk, for $2\leq d\leq 5$. In order to develop this investigation we construct an expression for the fermionic propagator, which can be applied for those different dimensions of the spacetime. Two specific analysis for the induced current densities are presented: $(i)$ for massless fields in three and four dimensions, and $(ii)$ for massive fields in all dimensions considered. In the latter specific values for the parameters which codify the presence of the cosmic string and the fractional part of the ratio of the magnetic flux by the quantum one are considered. Although being a very special situation and somewhat unnatural, the corresponding analysis of induced fermionic current densities under this circumstance may shed light on the qualitative behavior of these quantities in a more general situation.
description: 26 pages, 2 figure. Paper accepted for publication in Classical and Quantum Gravity
title: Bitácora. AN EXPLORATION BETWEEN TWO WORLDS>100 ILLUSTRATED CREATURES
Creators: name: Rueda, Mateo
Publisher: name: Utah State University
Year: 2014

description: Bitácora is the spanish word for log or a journal that is related to the observations explorers would make about their journeys. We observe this world around us and measure it, we write and draw about it. Modern science has taught us how insignificant we are in the universe, how abstract reality itself can be. We can only continue to wonder and keep exploring through this unsettling but delightful paradigm known as existence itself.
title: Alice's Adventure Through Second Language Acquisition: An Educator's Perspective
Creators: name: Lee, Jessica Pryor
Publisher: name: Utah State University
Year: 2014

description: The author employs narrative writing to illustrate annotated bibliographies, classroom observations, research and research proposals, and self-reflections for second language learning. Elementary, secondary, adult, and college-level teachings are addressed. The author focuses on communicative language teaching, brain-based teaching, and dual language immersion with content based instruction. She addresses the importance of writing, authentic materials, task-based activities, communication, and the recognition of heritage learners. The main character is Alice and she travels through Argentina and Chile. Footnotes are used to keep the narrative style of the portfolio coherent. While the storyline is fictitious, all information included is based on the author’s research and actual classroom observations.
title: An Investigation in the Use of Memorizing as a Learning Method When Teaching Measurement in a Technology Education Classroom
Creators: name: Porter, Joseph R.
Publisher: name: Utah State University
Year: 2014

description: The Utah State Office of Education (USOE) has indicated in the objectives for many courses that students need to be able to identify measurements on a conventional ruler including 1/2, 1/4, 1/8, and 1/16-inch increments (Utah State Office of Education Career and Technology Education Division, 2012, p. 2). This objective is present in Career and Technical Education (CTE) Introduction, a required class for all Utah seventh graders, and is repeated in most of the CTE Technology and Engineering courses offered in the state. In conference with many other technology teachers, it has been observed that although they have taught this curriculum for years, they continue to observe that the student’s level of retention is low. They always have to reteach the measurement lesson in each of the successive technology education classes the student’s take. Some students have taken many courses that contain this instruction and yet they still seem to struggle to be proficient in meeting this objective. In an effort to align curriculum between the high schools and junior high schools in the Alpine School District in Utah, vertical alignment meetings were held. In the area of CTE Technology and Engineering, and Skilled and Technical Sciences, it was determined that one of the skills students entering high school lack is the ability to measure accurately. These students are being taught year after year and they are not retaining the knowledge.
title: The Shale Boon and the Effects on Energy Markets: A Look Into Natural Gas and Crude Oil Futures and Spot Prices and their Relation to Economic Growth
Creators: name: Backstrom, Jesse
Publisher: name: Utah State University
Year: 2014

description: A key political concern for the United States (US) since World War II has been its dependence on foreign energy. These concerns have arisen from a volatile nature of crude oil prices and the country’s preexisting beliefs of peak oil in the early 1970s, resulting in unpredictable energy markets. Highlighted have been episodes of rising oil prices leading to recessions, higher inflation rates, and economic stagnation (Brown and Yucel, 2013). Changing this story are recent gains in both crude oil and natural gas production, helping to vault the country to at least temporary energy stardom. In fact, 2014 statistics from the US Energy Information Administration (EIA) showed that domestic total technically recoverable shale gas resources are at 665 trillion cubic feet. The EIA also showed that in the year 2000 natural gas from shale formations provided only 1% of US natural gas production; by 2010 it was over 20% and the EIA predicts that by 2035, 46% of the natural gas supply will come from shale gas.
title: Increasing Teacher Instructional Behaviors While Engaged in Direct Instruction Through the Use of Videotaping
Creators: name: Olson, Linda
Publisher: name: Utah State University
Year: 2014

description: First year special education teachers enter an extremely complex and challenging profession. Even those who come from strong university preparation programs need substantial coaching to become effective in the many responsibilities of a special education teacher. Among the crucial targets of this kind of coaching program are basic, essential, effective teaching skills. This creative project took place within the context of a broad mentoring program developed by the author. It focused on evaluating one component of that program: video-supported coaching on essential effective teaching skills. The teaching skills here were: (a) providing frequent opportunities for student responses (OTRs), (b) error correction and (c) positive interactions with students (a two part teaching skill that includes both: ratio positive: negative interactions and praise rate). The specific target-behavior chosen for each teacher was based on: first, the strength of their OTRs; second, positive interaction which entails rate/ratio of praises; and finally, the accuracy of their error correction abilities, in that order. This information was acquired from the observational baseline data. The order of teacher behavior acquisition was chosen according to research from Archer and Hughes (2011) and Sprick (2009) who believe that high OTRs can assist in getting higher rates of praise simply because OTRs provide a vehicle on which praise can be attached resulting in the enhancement of both areas simultaneously. Using this criteria three of the teachers' target area were OTRs and the other two teachers focused on "praise". Error Correction tends to be the most difficult of the three behaviors to master and although data was collected during baseline phase it did not continue after baseline as all teachers were focusing on the first two behaviors, as per the order of emphasis previously mentioned. This project evaluate5 the effects of video-supported coaching on these targeted teaching behaviors.
title: She Was Our Mother: Manifest Destiny and Misconceptions in New Mexico, 1845-48
Creators: name: Palmer, Greg Merrill
Publisher: name: Utah State University
Year: 2014

description: The story of how New Mexico became part of the United States is well known, along with many of the different legends. In an effort to shine new light onto this historical stage I took many of the same documents that other scholars have used and studied them from a colonial viewpoint. New Mexico appeared to be further along in its nationalism and economic development than other areas of the continent before the United States took an interest in it, but the American movement west can, and should, be read as an early United States colonial expansion. This new reading deserves its own narrative, which is provided here.
In order to undertake this new reading I have examined some key issues including the misconceptions that many Americans held towards New Mexico and its people, the economic relations between Americans, New Mexicans, and Native Americans, and the importance of Manifest Destiny in the push westward. None of these are new subjects, but a colonial reading of the documents provides a new perspective that will demonstrate how different the United States’ advance into New Mexico was from other westward movements.
title: Individual Gains: A Personal History of Learning, Writing, and Teaching
Creators: name: Whipple, Nate
Publisher: name: Utah State University
Year: 2014

description: This essay began as an attempt to understand my students. When I chose to write about the students in my writing classes, I was immersed in research for my thesis. The topic of my thesis at the time was higher education and reform in the United States. In general, voices from my research asserted, students in higher education are increasingly apathetic, lazy, negligent, and as a result are underachieving at a higher rate than ever before.
title: The Good News in Short Interest: Ekkehart Boehmer, Zsuzsa R. Huszar, Bradford D. Jordan 2009 Revisited
Creators: name: Julander, Jarom Von
Publisher: name: Utah State University
Year: 2014

description: There are a few ways to examine excess market returns in financial literature. One common model used was the Capital Asset Pricing Model or the CAPM. In more recent years some researchers use the Fama French 3 Factor model (FF3F). Using this FF3F model researchers and investors alike have been searching for those excess returns, or the returns above what the market achieves, because everyone would like to “beat the market” as they say. In Boehmer, Huszar, and Jordan’s 2009 paper “The Good News in Short Interest”, the authors believe that they have found a way to get significant excess returns above the market using a simple strategy. When they back tested their strategy against historical markets their results were both statistically and economically significant.
title: Reliability Analysis For Shear In Lightweight Reinforced Concrete Bridges Using Shear Beam Database
Creators: name: Jensen, Danile F.
Publisher: name: Utah State University
Year: 2014

description: The objective of this report is to analyze and calibrate the reliability indices for shear in reinforced concrete bridge girders. Existing statistical models are based on limited experimental data from only a few research tests. These existing models show that our current procedures for analysis are about 10-15% less conservative for lightweight concrete compared to an analysis for normal weight concrete. Accurate load models are used to find shear and moment envelopes of loads applied to bridges. Analysis is based on different span lengths, span number and girder dimensions. Design calculations are performed using design values and loads calculated from load models. Different strength of concrete are also used to compare the reliabilities of various parameters. Results show that when using a professional factor of 1.0 and variability of 0.0 and a resistance factor of 0.8 can be applied to the AASHTO design equation for shear in reinforced concrete. After sorting approximately 100 previous lightweight beam tests a better understanding of lightweight concrete girders is known.
title: Soil Moisture and Temperature Conditions Related to Cheatgrass Establishment Failure
Creators: name: Ducas, Lauren
Publisher: name: Utah State University
Year: 2014

description: Cheatgrass, a widespread invasive plant, has taken over many rangelands in the Intermountain West. Restoration efforts have not met with much success. Early in cheatgrass’ growth period, if air temperatures fall too low and soils too dry, growth may be disrupted to the point of death of the cheatgrass plants. In this case, cheatgrass stands may revert to bare ground, providing opportunities for other invasive plants to establish, or possible restoration of native perennials. We conducted a computer modeling and observational field study to determine if air temperature and soil moisture conditions below its tolerance are associated with failure of cheatgrass stands. We found that a combination of dry soil conditions in the cheatgrass rooting zone in fall 2007 and cool spring temperature in spring 2008 provided at least a partial explanation for the reversion of cheatgrass to bare ground in spring 2008. Available soil moisture and nutrient resources left unused by cheatgrass failure represent an opportunity for restoration or exploitation by additional invasive species. Conditions leading to invasion of cheatgrass by other invasive species may represent the best conditions for restoration to native perennial vegetation.
title: Did Market Quality Change After the Introduction of Leveraged ETF's
Creators: name: Shashi, Prem
Publisher: name: Utah State University
Year: 2014

description: Leveraged and Inverse Leveraged ETFs were introduced in the summer of 2006 and have been becoming popular ever since. They became extremely popular during the nancial crisis of 2008 and that made them the obvious scapegoat taking the blame for the increase in volatility during that period. This paper examines how the S & P 500 market quality dened in terms of liquidity, volatility and eciency was aected after the introduction of 2x and 3x leveraged and inverse leveraged ETFs. I nd that after the introduction of the 2x leveraged and inverse leveraged ETFs, the market volatility decreased while the market liquidity and eciency improved. After the introduction of the 3x leveraged and inverse leveraged ETFs, the market quality as a whole improved.
Neutrinos versus Quarks, MNS versus CKM
Creators: name: Chen, Mu-Chun
name: Mahanthappa, K. T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review recent developments in models of fermion masses and mixing for both quark and lepton sectors. Emphases are given to models based on finite group family symmetries. In particular, we describe one recent model based on SU(5) combined with a family symmetry based on the double tetrahedral group, T'. In this model, a near tri-bimaximal MNS matrix and a realistic CKM matrix are simultaneously generated; the MNS matrix gets slightly modified by virtue of having the Georgi-Jarlskog relations. Due to the presence of complex Clebsch-Gordon coefficients in T', CP violation in this model is entirely geometrical in origin.
description: 10 pages, Plenary talk given by M.-C. Chen at the 6th International Conference on Flavor Physics and CP Violation (FPCP 2009), Lake Placid, NY, May 27 - June 1, 2009
Greedy energy points with external fields
Creators: name: García, A. López
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 31C15, 31B99 (Primary), 52A40, 78A30 (Secondary)

description: In this paper we introduce several extremal sequences of points on locally compact metric spaces and study their asymptotic properties. These sequences are defined through a greedy algorithm by minimizing a certain energy functional whose expression involves an external field. Some results are also obtained in the context of Euclidian spaces $\mathbb{R}^{p}$, $p\geq 2$. As a particular example, given a closed set $A\subset\mathbb{R}^{p}$, a lower semicontinuous function $f:\mathbb{R}^p\to(-\infty,+\infty]$ and an integer $m\geq 2$, we investigate (under suitable conditions on $A$ and $f$) sequences $\{a_{i}\}_{1}^{\infty}\subset A$ that are constructed inductively by selecting the first $m$ points $a_{1},...,a_{m}$ so that the functional \[ \sum_{1\leq i
description: Section with numerical experiments added, typos corrected, minor modifications in the text, new reference added. The space X is assumed to be metric (instead of Hausdorff) to ensure that the space of positive measures supported on a compact subset of X, endowed with the weak-star topology, satisfies the first axiom of countability, 22 pages
Additional file 1 of Understanding parental self-medication with antibiotics among parents of different nationalities: a cross-sectional study
Creators: name: Zhou, Zhongliang
name: Zhao, Dantong
name: Zhang, Huarui
name: Shen, Chi
name: Cao, Dan
name: Liu, Guanping
name: Zhu, Liang
name: Fang, Yu
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1: Questionnaire of parental self-medication with antibiotics among parents of different nationalities (English Version).
Mass Estimation of Planck Galaxy Clusters using Deep Learning
Creators: name: de Andres, Daniel
name: Cui, Weiguang
name: Ruppin, Florian
name: De Petris, Marco
name: Yepes, Gustavo
name: Lahouli, Ichraf
name: Aversano, Gianmarco
name: Dupuis, Romain
name: Jarraya, Mahmoud
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Clusters of galaxies mass can be inferred by indirect observations, see X-ray band, Sunyaev-Zeldovich (SZ) effect signal or optical. Unfortunately, all of them are affected by some bias. Alternatively, we provide an independent estimation of the cluster masses from the Planck PLSZ2 catalog of galaxy clusters using a machine-learning method. We train a Convolutional Neural Network (CNN) model with the mock SZ observations from The Three Hundred(the300) hydrodynamic simulations to infer the cluster masses from the real maps of the Planck clusters. The advantage of the CNN is that no assumption on a priory symmetry in the cluster's gas distribution or no additional hypothesis about the cluster physical state are made. We compare the cluster masses from the CNN model with those derived by Planck and conclude that the presence of a mass bias is compatible with the simulation results.
description: To appear in the Proceedings of the International Conference entitled "mm Universe @NIKA2", Rome(Italy), June 2021, EPJ Web of conferences
Magic ratio of window width to grating period for Van der Waals potential measurements using material gratings
Creators: name: Lonij, Vincent P. A.
name: Holmgren, William F.
name: Cronin, Alexander D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report improved precision measurements of the Van der Waals potential strength ($C_3$) for Na atoms and a silicon-nitride (SiN$_x$) surface. We studied diffraction from nano-fabricated gratings with a particular "magic" open-fraction that allows us to determine $C_3$ without the need for separate measurements of the width of the grating openings. Therefore, finding the magic open-fraction improves the precision of $C_3$ measurements. The same effect is demonstrated for a grating with an arbitrary open-fraction by rotating it to a particular "magic" angle, yielding $C_3=3.42\pm 0.19 \textrm{eV} \mathring{\textrm{A}}^3$ for Na and a SiN$_x$ surface. This precision is sufficient to detect a change in $C_3$ due to a thin metal coating on the grating surface. We discuss the contribution to $C_3$ of core electrons and edge effects.
Imaginary-time formulation of steady-state nonequilibrium in quantum dot models
Creators: name: Han, J. E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We examine the recently proposed imaginary-time formulation for strongly correlated steady-state nonequilibrium for its range of validity and discuss significant improvements in the analytic continuation of the Matsubara voltage as well as the fermionic Matsubara frequency. The discretization error in the conventional Hirsch-Fye algorithm has been compensated in the Fourier transformation with reliable small frequency behavior of self-energy. Here we give detailed discussions for generalized spectral representation ansatz by including high order vertex corrections and its numerical analytic continuation procedures. The differential conductance calculations agree accurately with existing data from other nonequilibrium transport theories. It is verified that, at finite source-drain voltage, the Kondo resonance is destroyed at bias comparable to the Kondo temperature. Calculated coefficients in the scaling relation of the zero bias anomaly fall within the range of experimental estimates.
description: 16 pages, 10 figures, Comparison to other theories added
Perturbative instabilities in Horava gravity
Creators: name: Bogdanos, C.
name: Saridakis, Emmanuel N.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the scalar and tensor perturbations in Horava gravity, with and without detailed balance, around a flat background. Once both types of perturbations are taken into account, it is revealed that the theory is plagued by ghost-like scalar instabilities in the range of parameters which would render it power-counting renormalizable, that cannot be overcome by simple tricks such as analytic continuation. Implementing a consistent flow between the UV and IR limits seems thus more challenging than initially presumed, regardless of whether the theory approaches General Relativity at low energies or not. Even in the phenomenologically viable parameter space, the tensor sector leads to additional potential problems, such as fine-tunings and super-luminal propagation.
description: 21 pages, version published at Class. Quant. Grav
title: Intususcepción intestinal en el adulto ¡Échale invaginación, busca la cabeza!
Creators: name: Villalba Gutiérrez, Alvaro
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Metastases
subject: Motility
subject: Neoplasia
subject: Education
subject: CT
subject: Colon
subject: Small bowel
subject: Abdomen

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Aportar claves radiológicas útiles para la identificación de patología intestinal subyacente que actúe como “cabeza” de invaginación intestinal cuando se valora esta entidad mediante tomografía computerizada...
title: Neumonía lipoidea exógena en pacientes laringuectomizados. Hallazgos en imagen.
Creators: name: García Latorre, Raquel
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Thorax
subject: CT
subject: PET-CT
subject: MR

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
El objetivo de este póster es revisar los hallazgos en imagen (TC,
PET/TC,
RM) más frecuentes de la neumonía lipoidea exógena (NLE) a propósito de 4 casos de pacientes laringuectomizados y portadores de traqueostomía,
de nuestro...
title: TC multidetector (TCMD) en la valoración de las complicaciones de la ablación de venas pulmonares.
Creators: name: Gallego Beuth, Julio
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Obstruction / Occlusion
subject: Dissection
subject: Diagnostic procedure
subject: CT-Angiography
subject: CT
subject: Cardiac

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Comprender y describir la anatomía de las venas pulmonares por TCMD. Revisión de la patología de las venas pulmonares a través de la descripción y el análisis de múltiples casos recogidos en nuestro servicio. Mostrar la utilidad de la TCMD en...
Stationary Phase and the Theory of Measurement -- 1/N expansion --
Creators: name: Fukuda, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The measuring process is studied, where a macroscopic number N of particles in the detector interact with the object. The macrovariable accompanies the stationary phase in the path-integral form, which is in one-to-one correspondence with the eigen-value of the object operator O to be measured. When N goes to infinity, the fluctuation of the object between different eigenvalues of O is suppressed, frozen to one the same state while the detector is on. A model is studied which produces the ideal result when N is infinite, and the correction terms are calculated in powers of 1/N. It is identical to the expansion including the fluctuation of the object successively.
description: 14 pages
Stock volatility as an anomalous diffusion process
Creators: name: R. V., Arevalo
name: J. Alberto, Conejero
name: Oscar, Garibo-i-Orts
name: A., Peris
Publisher: name: Zenodo
Year: 2025

description: # Anomalous diffusion stocks

In financial markets, understanding asset volatility—whether historical or implied—is essential for investors. This paper presents a new approach for estimating the volatility of stocks or similar assets using principles of anomalous diffusion, applied through Recurrent Neural Networks (RNNs). We employ an innovative RNN architecture, combining convolutional layers with bidirectional LSTMs, in a model known as UPV-MAT (developed by Universitat Politècnica de València - Matemática Aplicada), which was initially created for the AnDi-challenge. The model calculates the diffusion exponent as a measure of volatility and classifies market movements into five distinct diffusion types: ATTM (Annealed Transit Time Model), CTRW (Continuous Time Random Walk), FBM (Fractional Brownian Motion), LW (Levy Walk), and SBM (Scaled Brownian Motion). Our findings suggest that the diffusion exponent derived from anomalous diffusion processes, as determined by the UPV-MAT model, provides a valuable tool for analyzing stock market volatility. This approach sheds light on whether a stock is experiencing sub-diffusion, super-diffusion, or normal diffusion, offering a more comprehensive view of market dynamics than traditional volatility metrics.
Solenoidal versus compressive turbulence forcing
Creators: name: Federrath, C.
name: Duval, J.
name: Klessen, R. S.
name: Schmidt, W.
name: Mac Low, M. -M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyze the statistics and star formation rate obtained in high-resolution numerical experiments of forced supersonic turbulence, and compare with observations. We concentrate on a systematic comparison of solenoidal (divergence-free) and compressive (curl-free) forcing, which are two limiting cases of turbulence driving. Our results show that for the same RMS Mach number, compressive forcing produces a three times larger standard deviation of the density probability distribution. When self-gravity is included in the models, the star formation rate is more than one order of magnitude higher for compressive forcing than for solenoidal forcing.
description: 1 page, to appear in the proceedings of the IAU General Assembly Joint Discussion 14 "FIR2009: The ISM of Galaxies in the Far-Infrared and Sub-Millimetre", ed. M. Cunningham
Stock volatility as an anomalous diffusion process
Creators: name: Ruben, Vicente Arevalo
name: Alberto, Conejero
name: Alfred, Peris
Publisher: name: Zenodo
Year: 2024

description: # Anomalous diffusion stocks

In financial markets, asset volatility—whether historical or implied—is crucial for investors. This article introduces a novel methodology for estimating stock or similar asset volatility, based on the principles of anomalous diffusion and employing Recurrent Neural Networks (RNNs). Specifically, it utilizes a combination of convolutional and bidirectional LSTM architecture within an RNN, named UPV-MAT (Universi-tat Polit ́ecnica de Valencia - Matem ́atica Aplicada), initially developed for the AnDi-challenge. This model estimates the diffusion exponent as a measure of volatility and categorizes market movements into one of four models: ATTM (Annealed Transit Time Model), CTRW (Continuous Time Random Walk), FBM (Fractional Brownian Motion), LW (Levy Walk), and SBM (Scaled Brownian Motion). We conclude that the exponent derived from anomalous diffusion processes, as determined by the UPV- MAT model, offers valuable insights into stock market volatility. It provides a novel perspective on market dynamics by elucidating whether a stock undergoes sub-diffusion, super-diffusion, or normal diffusion, thereby surpassing conventional volatility metrics.
Acceleration and clustering of cosmic dust in a gravoturbulent gas -- I. Numerical simulation of the nearly Jeans-unstable case
Creators: name: Mattsson, Lars
name: Hedvall, Robert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the dynamics of interstellar dust particles in moderately high resolution ($512^3$ grid points) simulations of forced compressible transonic turbulence including self-gravity of the gas. Turbulence is induced by stochastic compressive forcing which is delta-correlated in time. By considering the nearly Jeans-unstable case, where the scaling of the simulation is such that a statistical steady state without any irreversible collapses is obtained, we obtain a randomly varying potential, acting as a second stochastic forcing. We show that, in this setting, low-inertia grains follow the gas flow and cluster in much the same way as in a case of statistical steady-state turbulence without self-gravity. Large, high-inertia grains, however, are accelerated to much higher mean velocities in the presence of self-gravity. Grains of intermediate size also show an increased degree of clustering. We conclude that self-gravity effects can play an important role for aggregation/coagulation of dust even in a turbulent system which is not Jeans-unstable. In particular, the collision rate of large grains in the interstellar medium can be much higher than predicted by previous work.
description: 17 pages, 11 figures, accepted for publication MNRAS. Reference list corrected
Analytic Torsion of Z_2-graded Elliptic Complexes
Creators: name: Mathai, Varghese
name: Wu, Siye
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 58J52, Secondary 58J10, 35K08, 57R56

description: We define analytic torsion of Z_2-graded elliptic complexes as an element in the graded determinant line of the cohomology of the complex, generalizing most of the variants of Ray-Singer analytic torsion in the literature. It applies to a myriad of new examples, including flat superconnection complexes, twisted analytic and twisted holomorphic torsions, etc. The definition uses pseudo-differential operators and residue traces. We also study properties of analytic torsion for Z_2-graded elliptic complexes, including the behavior under variation of the metric. For compact odd dimensional manifolds, the analytic torsion is independent of the metric, whereas for even dimensional manifolds, a relative version of the analytic torsion is independent of the metric. Finally, the relation to topological field theories is studied.
description: 14 pages, typos corrected and other minor changes made in the revised version
Stock volatility as an anomalous diffusion process
Creators: name: Ruben, Vicente Arevalo
name: Alberto, Conejero
name: Alfred, Peris
Publisher: name: Zenodo
Year: 2024

description: # Anomalous diffusion stocks

In financial markets, understanding asset volatility—whether historical or implied—is essential for investors. This paper presents a new approach for estimating the volatility of stocks or similar assets using principles of anomalous diffusion, applied through Recurrent Neural Networks (RNNs). We employ an innovative RNN architecture, combining convolutional layers with bidirectional LSTMs, in a model known as UPV-MAT (developed by Universitat Politècnica de València - Matemática Aplicada), which was initially created for the AnDi-challenge. The model calculates the diffusion exponent as a measure of volatility and classifies market movements into five distinct diffusion types: ATTM (Annealed Transit Time Model), CTRW (Continuous Time Random Walk), FBM (Fractional Brownian Motion), LW (Levy Walk), and SBM (Scaled Brownian Motion). Our findings suggest that the diffusion exponent derived from anomalous diffusion processes, as determined by the UPV-MAT model, provides a valuable tool for analyzing stock market volatility. This approach sheds light on whether a stock is experiencing sub-diffusion, super-diffusion, or normal diffusion, offering a more comprehensive view of market dynamics than traditional volatility metrics.