cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Model weights for DINOv2 ViT-S and ViT-g finetuned on histopathological data
Creators: name: Roth, Benedikt
name: Koch, Valentin
name: Wagner, Sophia J.
name: Schnabel, Julia
name: Marr, Carsten
name: Peng, Tingying
Publisher: name: Zenodo
Year: 2024
Subjects: deep learning
histopathology
DINOv2

description: These are the weights produced by finetuning the pretrained models DINOv2 ViT-S and ViT-g using histopathological data. The code can be found here: beneroth13/dinov2: PyTorch code and models for the DINOv2 self-supervised learning method, own data set and own adapted training. (github.com)

For the finetuning, the publicly available datasets TCGA and NCT-CRC-100K were used. The pipeline was slightly adapted from the original DINOv2 Github. More details can be found in our Github Repository.

The weights can be used to continue training or reproduce results.
การเสริมสร้างความมั่นคงและประเมินคุณภาพการให้บริกาของไอสานบ๊อกด็อทเอฟ
Creators: name: ประดิษฐ์ วงศ์สกุล
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: วีโอไอพี, คุณภาพการให้บริการของวีโอไอพี, RTP Sniffing, SIP Flooding, ฟรีสวิตช์

description: 4, 34, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Eigenvalue estimates for Dirac operator with the generalized APS boundary condition
Creators: name: Chen, Daguang
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C27;34L15

description: Under two boundary conditions, the generalized Atiyah-Patodi-Singer boundary condition and the modified generalized -Atiyah-Patodi-Singer boundary condition, we get the lower bounds for the eigenvalues of the fundamental Dirac operator on compact spin manifolds with nonempty boundary.
description: 12pages
Neural Representations in Hybrid Recommender Systems: Prediction versus Regularization
Creators: name: Raziperchikolaei, Ramin
name: Li, Tianyu
name: Chung, Young-joo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Autoencoder-based hybrid recommender systems have become popular recently because of their ability to learn user and item representations by reconstructing various information sources, including users' feedback on items (e.g., ratings) and side information of users and items (e.g., users' occupation and items' title). However, existing systems still use representations learned by matrix factorization (MF) to predict the rating, while using representations learned by neural networks as the regularizer. In this paper, we define the neural representation for prediction (NRP) framework and apply it to the autoencoder-based recommendation systems. We theoretically analyze how our objective function is related to the previous MF and autoencoder-based methods and explain what it means to use neural representations as the regularizer. We also apply the NRP framework to a direct neural network structure which predicts the ratings without reconstructing the user and item information. We conduct extensive experiments on two MovieLens datasets and two real-world e-commerce datasets. The results confirm that neural representations are better for prediction than regularization and show that the NRP framework, combined with the direct neural network structure, outperforms the state-of-the-art methods in the prediction task, with less training time and memory.
title: Experiment Development and Validation of a Granular Jamming Robotic Gripper
Creators: name: Dowd, Jacob
Publisher: name: University of Nevada, Las Vegas
publisherIdentifier: https://ror.org/0406gha72
publisherIdentifierScheme: ROR
Year: 2024

description: A granular jamming gripper (GJG) is widely known as a Universal Gripper because of the wide range of objects that it can grasp and the simplicity of control, design, and manufacturing. Despite multitude of research improving the GJG, here, we focus on the base version of the GJG and attempt to glean the range of objects that it may reliably grasp. Despite the limited range of objects, which were a sphere, rectangular prism, and cylinder, we gleaned geometric properties as it relates to successful and unsuccessful grasping. This was based on the two types of testing: push and pull testing that measured the grasp ability, and grasp strength, respectively. The experiment results were surprising because we used the load cell in different orientations, but we attained the expected results as if the load cell was in the same orientation. These experiments attempt to validate and build upon current research by economically developing and testing the apparatus and gripper. From these experiments, we validated that the gripper grasp ability depends on the gripper diameter, and the contact angle with the object via introducing a “pressure” parameter that is the force by the surface area contact. Since a cartesian machine was used, we can nearly guarantee the depth into the object and therefore calculate the surface area contact using the 3D model.
Further Results on Lyapunov Functions for Slowly Time-Varying Systems
Creators: name: Mazenc, Frederic
name: Malisoff, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 93D30

description: We provide general methods for explicitly constructing strict Lyapunov functions for fully nonlinear slowly time-varying systems. Our results apply to cases where the given dynamics and corresponding frozen dynamics are not necessarily exponentially stable. This complements our previous Lyapunov function constructions for rapidly time-varying dynamics. We also explicitly construct input-to-state stable Lyapunov functions for slowly time-varying control systems. We illustrate our findings by constructing explicit Lyapunov functions for a pendulum model, an example from identification theory, and a perturbed friction model.
description: Accepted for publication in Mathematics of Control, Signals, and Systems (MCSS) on November 20, 2006
Reinscribing colonialism: the Royal Commission on Indian Affairs in Nlha’pamux and Stl’atl’imx Territory, 1914
Creators: name: Schuurman, Nadine Cato
Publisher: name: University of British Columbia
Year: 2009

description: In 1912 a joint federal-provincial Royal Commission on Indian Affairs for the province of British Columbia was appointed. Intended "to settle all differences between the Governments of the Dominon and the Province respecting Indian land and Indian Affairs in the Province," the Commission travelled through British Columbia for three years interviewing thousands of native people. Its primary mandate was to settle the Indian land question. The Royal Commission also sought to measure the acculturation of native people to European society. As a representative of the state, it adjudicated issues related to railway construction and native fishing and hunting rights as well as land claims. While the Commission represented a political program for Indians,' first nation people were nevertheless persistent in advancing their own claims. Native responses to many aspects of colonialism were expressed through their testimony. Frequent objections to the reserve system, loss of fishing and hunting privileges as well objections to railway construction were woven through native testimony. First nations also beseeched the state to recognize 'Aboriginal Title' to the land. Receptivity to problems presented by witnesses was, however, mediated by an enormous gulf of power which separated native people from the Commission. This thesis examines those relations of power as they were articulated through native testimony to the Royal Commission on Indian Affairs in 1914 in the southern interior of British Columbia.
Rimozione del biofilm dalla superficie implantare attraverso l'utilizzo di diversi strumenti: studio clinico multicentrico con follow-up a 6 mesi.
Creators: name: Matarasso, Roberta
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Obiettivo:
 L'obiettivo di questo studio è stato quello di confrontare l'efficacia di diversi strumenti atti alla rimozione del biofilm dalla superficie di impianti supportanti corone protesiche.
Materiali e metodi:
Lo studio è stato disegnato come uno studio clinico  comparativo che include pazienti provenienti
da tre diversi centri quali Milano, Napoli, e Buenos Aires, affetti da mucosite perimplantare.
Gli impianti che hanno fatto parte dello studio sono stati inseriti in 4 gruppi e trattati
rispettivamente con strumenti quali scaler ultrasonici con punta di plastica, curettes in titanio, air-
flow e polvere di glicina, coppeta in plastica e pasta abrasiva . mPI è stato registrato al baseline,
immediatamente dopo la terapia, a 1,3,6 mesi.
 mBI, PD, and REC sono stati registrati al baseline, 1, 3, and 6 mesi. Tutti i parametri sono stati
registrati su sei siti per impianto .
Kruskal–Wallis and Mann–Whitney test sono stati utilizzati per l'analisi statistica atta a
 confrontare i diversi gruppi.
Un modello generalizzato lineare per le misure "repeated" è stato scelto per la comparazione tra i
gruppi.
Il confronto all'interno dello stesso Gruppo è stato effettuato con "repeated measure"
E' stato utilizzato l'ANOVA test per valutare le differenze dei valori al baseline e ai diversi momenti
 di follow-up (richiami).
Risultati:
 Un totale di 89 pazienti (39 maschi e 50 femmine) sono stati arruolati in questo studio, per un
totale di 141 impianti disponibili per lo studio.
55 impianti sono stati selezionati dall' Università di Buenos Aires, 32 da quella di Milano e 54
dall' Università di Napoli. Non ci sono state differenze statisticamente significative tra i 4 gruppi
per quanto riguarda lo stato di riduzione dell'infiammazione della mucosa perimplantare.
Conclusioni:
 La terapia non chirurgica ha mostrato una effettiva riduzione della mucosite
perimplantare. Gli scaler sonici con punte in plastica e le coppette di gomma con pasta abrasiva
hanno mostrato maggiore efficacia rispetto alle curettes in titanio e l air flow con polvere di
glicina.
First order radiative corrections to Bhabha scattering in $d$ dimensions
Creators: name: Fleischer, J.
name: Gluza, J.
name: Lorca, A.
name: Riemann, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The luminosity measurement at the projected International Linear $e^+e^-$ Collider ILC is planned to be performed with forward Bhabha scattering with an accuracy of the order of $10^{-4}$. A theoretical prediction of the differential cross-section has to include one-loop weak corrections, with leading higher order terms, and the complete two-loop QED corrections. Here, we present the weak part and the virtual one-loop photonic corrections. For the photonic corrections, the expansions in $ε= (4-d)/2$ are derived with inclusion of the terms of order $ε$ in order to match the two-loop accuracy. For the photonic box master integral in $d$ dimensions we compare several different methods of evaluation.
description: 35 pages, 3 figures, 2 tables, uses feynmp.sty, references updated
Anisotropic equations with indefinite potential and competing nonlinearities
Creators: name: Papageorgiou, Nikolaos S.
name: Rădulescu, Vicenţiu D.
name: Repovš, Dušan D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J10, 35J70

description: We consider a nonlinear Dirichlet problem driven by a variable exponent $p$-Laplacian plus an indefinite potential term. The reaction has the competing effects of a parametric concave (sublinear) term and of a convex (superlinear) perturbation (an anisotropic concave-convex problem). We prove a bifurcation-type theorem describing the changes in the set of positive solutions as the positive parameter $λ$ varies. Also, we prove the existence of minimal positive solutions.
An algorithm for onset detection of linguistic segments in continuous electroencephalogram signals
Creators: name: Hernández-Del-Toro, Tonatiuh
name: Reyes-García, Carlos A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: A Brain Computer Interface based on imagined words can decode the word a subject is thinking on through brain signals to control an external device. In order to build a fully asynchronous Brain Computer Interface based on imagined words in electroencephalogram signals as source, we need to solve the problem of detecting the onset of the imagined words. Although there has been some research in this field, the problem has not been fully solved. In this paper we present an approach to solve this problem by using values from statistics, information theory and chaos theory as features to correctly identify the onset of imagined words in a continuous signal. On detecting the onsets of imagined words, the highest True Positive Rate achieved by our approach was obtained using features based on the generalized Hurst exponent, this True Positive Rate was 0.69 and 0.77 with a timing error tolerance region of 3 and 4 seconds respectively.
Centering the margins: what can be learned from listening to the voices of lesbians over 55?
Creators: name: Gallagher, Karen A.
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to centre the voices of older lesbians about their lived experience. Within the discourse of gerontology, the existence of older lesbians is invisible. Older lesbian existence is also marginalized within the lesbian community. Institutionalized heterosexism, homophobia, sexism and ageism, counter to the Social Work Code of Ethics, serve to enforce that invisibility and marginalization in the dominant Canadian culture. In order to provide some information on this marginalized group, four lesbians over the age of 55 were interviewed individually by a lesbian researcher. An exploratory, emancipatory, feminist qualitative research methodology elicited an informationrich discourse. The four women's stories were organized into their individual stories, and were translated into eleven themes, as follows: (1) heterosexism and homophobia, (2) ageism, (3) financial concerns, (4) housing and senior-serving institutions, (5) health problems, (6) vulnerability to crime and abuse, (7) isolation, (8) sexuality, (9) grief and loss, (10) organized religion, and (11) feelings about the lesbian community. The women in this study spoke eloquently about the issues that affect them and other older lesbians. The lived experience of the participants challenges social work's policies, practices, education and research to become inclusive of older lesbians.
Semi-supervised dictionary learning with graph regularization and active points
Creators: name: Tran, Khanh-Hung
name: Ngole-Mboula, Fred-Maurice
name: Starck, Jean-Luc
name: Prost, Vincent
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Supervised Dictionary Learning has gained much interest in the recent decade and has shown significant performance improvements in image classification. However, in general, supervised learning needs a large number of labelled samples per class to achieve an acceptable result. In order to deal with databases which have just a few labelled samples per class, semi-supervised learning, which also exploits unlabelled samples in training phase is used. Indeed, unlabelled samples can help to regularize the learning model, yielding an improvement of classification accuracy. In this paper, we propose a new semi-supervised dictionary learning method based on two pillars: on one hand, we enforce manifold structure preservation from the original data into sparse code space using Locally Linear Embedding, which can be considered a regularization of sparse code; on the other hand, we train a semi-supervised classifier in sparse code space. We show that our approach provides an improvement over state-of-the-art semi-supervised dictionary learning methods.
Heavy Higgs Resonances for the Neutralino Relic Density in the Higgs Decoupling Limit of the CP--noninvariant Minimal Supersymmetric Standard Model
Creators: name: Choi, S. Y.
name: Kim, Y. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The lightest neutralino is a compelling candidate to account for cold dark matter in the universe in supersymmetric theories with $R$--parity. In the CP-invariant theory, the neutralino relic density can be found in accord with recent WMAP data if neutralino annihilation in the early universe occurs via the s-channel $A$ funnel. In contrast, in the CP-noninvariant theory two heavy neutral Higgs bosons can contribute to the Higgs funnel mechanism significantly due to a CP-violating {\it complex} mixing between two heavy states, in particular, when they are almost degenerate. With a simple analytic and numerical analysis, we demonstrate that the CP-violating Higgs mixing can modify the profile of the neutralino relic density {\it considerably} in the heavy Higgs funnel with the neutralino mass close to half of the heavy Higgs masses.
description: 10 pages, 2 figures
Differential Galois obstructions for integrability of homogeneous Newton equations
Creators: name: Przybylska, Maria
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: n this paper we formulate necessary conditions for the integrability in the Jacobi sense of Newton equations $\ddot \vq=-\vF(\vq)$, where $\vq\in\C^n$ and all components of $\vF$ are polynomial and homogeneous of the same degree $l$. These conditions are derived from an analysis of the differential Galois group of the variational equations along special particular solutions of the Newton equations. We show that, taking all admissible particular solutions, we restrict considerably the set of Newton's equations satisfying the necessary conditions for the integrability. Moreover, we apply the obtained conditions for a detailed analysis of the Newton equations with two degrees of freedom (i.e., $n=2$). We demonstrate the strength of the obtained results analyzing general cases with $°F_i =l< 4$. For $l=3$ we found an integrable case when the Newton equations have two polynomial first integrals and both of them are of degree four in the momenta $p_1=\dot q_1$, and $p_2=\dot q_2$. Moreover, for an arbitrary $k$, we found a family of Newton equations depending on one parameter $λ$. For an arbitrary value of $λ$ one quadratic in the momenta first integral exist. We distinguish infinitely many values of $λ$ for which the system is integrable or superintegrable with additional polynomial first integrals which seemingly can be of an arbitrarily high degree with respect to the momenta.
description: submitted to Journal of Mathematical Physics
Bathymetric digital elevation model generation from L-band and X-band synthetic aperture radar images in the Gulf of Naples, Italy: innovative techniques and experimental results
Creators: name: Boccia, Valentina
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: The present Ph.D. Thesis investigates remote sensing bathymetric techniques in coastal area based on the use of Synthetic Aperture Radar (SAR) data. Since SAR signal is not able to pass sea surface and to reach sea bottom, indirect processes with sea floor morphology sensed through the effects it may have on sea surface are investigated.
The conventional bathymetric techniques are briefly analyzed and the main advantages related to the use of remote sensing SAR-based bathymetric techniques highlighted. Proper sea surface modeling is performed and its interaction with SAR is investigated. Two different bathymetric techniques are proposed: the Wave-Based Approach (WBA) and the Current-Based Approach (CBA). Several theories for proper modeling of the involved phenomena and of their retrieval from SAR images are presented and the most promising are identified. An error budget analysis is performed and potential performance, specifications and requirements of the considered bathymetric approaches are described.
With specific reference to the area of the Gulf of Naples, Italy, the Wave-Based Approach is selected because of current velocity being too slow or too irregular both in time and in intensity for proper application of the Current-Based Approach. Therefore, a WBA algorithm for sea surface spectrum retrieval from SAR data is proposed.
The proposed WBA algorithm is applied on both L-band ALOS PALSAR images and X-band COSMO-SkyMed SAR images covering the area of the Gulf of Naples, Italy. The experimental results and the achieved improvements with respect to the approaches found in the available literature are presented. Digital Elevation Models (DEMs) of seabed are obtained and a correlation analysis with the retrieved water depth values from the official nautical charts provided by the Italian Navy Hydrographic Institute is performed.
A catalog of broad morphology of Pan-STARRS galaxies based on deep learning
Creators: name: Goddard, Hunter
name: Shamir, Lior
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Autonomous digital sky surveys such as Pan-STARRS have the ability to image a very large number of galactic and extra-galactic objects, and the large and complex nature of the image data reinforces the use of automation. Here we describe the design and implementation of a data analysis process for automatic broad morphology annotation of galaxies, and applied it to the data of Pan-STARRS DR1. The process is based on filters followed by a two-step convolutional neural network (CNN) classification. Training samples are generated by using an augmented and balanced set of manually classified galaxies. Results are evaluated for accuracy by comparison to the annotation of Pan-STARRS included in a previous broad morphology catalog of SDSS galaxies. Our analysis shows that a CNN combined with several filters is an effective approach for annotating the galaxies and removing unclean images. The catalog contains morphology labels for 1,662,190 galaxies with ~95% accuracy. The accuracy can be further improved by selecting labels above certain confidence thresholds. The catalog is publicly available.
description: ApJS, accepted
Thermodynamics of a Heavy Ion-Irradiated Superconductor: the Zero-Field Transition
Creators: name: van der Beek, C. J.
name: Klein, Thierry
name: Brusetti, René
name: Marcenat, Christophe
name: Wallin, Mats
name: Teitel, S.
name: Weber, Hans
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Specific heat measurements show that the introduction of amorphous columnar defects considerably affects the transition from the normal to the superconducting state in zero magnetic field. Experimental results are compared to numerical simulations of the 3D XY model for both the pure system and the system containing random columnar disorder. The numerics reproduce the salient features of experiment, showing in particular that the specific heat peak changes from cusp-like to smoothly rounded when columnar defects are added. By considering the specific heat critical exponent alpha, we argue that such behavior is consistent with recent numerical work [Vestergren et al., PRB 70, 054508 (2004)] showing that the introduction of columnar defects changes the universality class of the transition.
description: 4 pages, 2 figures
Low-lying single-particle structure of 17C and the N = 14 sub-shell closure
Creators: name: Pereira-López, X.
name: Fernández-Domínguez, B.
name: Delaunay, F.
name: Achouri, N. L.
name: Orr, N. A.
name: Catford, W. N.
name: Assié, M.
name: Bailey, S.
name: Bastin, B.
name: Blumenfeld, Y.
name: Borcea, R.
name: Caamaño, M.
name: Caceres, L.
name: Clément, E.
name: Corsi, A.
name: Curtis, N.
name: Deshayes, Q.
name: Farget, F.
name: Fisichella, M.
name: de France, G.
name: Franchoo, S.
name: Freer, M.
name: Gibelin, J.
name: Gillibert, A.
name: Grinyer, G. F.
name: Hammache, F.
name: Kamalou, O.
name: Knapton, A.
name: Kokalova, T.
name: Lapoux, V.
name: Lay, J. A.
name: Crom, B. Le
name: Leblond, S.
name: Lois-Fuentes, J.
name: Marqués, F. M.
name: Matta, A.
name: Morfouace, P.
name: Moro, A. M.
name: Otsuka, T.
name: Pancin, J.
name: Perrot, L.
name: Piot, J.
name: Pollacco, E.
name: Ramos, D.
name: Rodríguez-Tajes, C.
name: Roger, T.
name: Rotaru, F.
name: Sénoville, M.
name: de Séréville, N.
name: Smith, R.
name: Sorlin, O.
name: Stanoiu, M.
name: Stefan, I.
name: Stodel, C.
name: Suzuki, D.
name: Suzuki, T.
name: Thomas, J. C.
name: Timofeyuk, N.
name: Vandebrouck, M.
name: Walshe, J.
name: Wheldon, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The first investigation of the single-particle structure of the bound states of 17C, via the d(16C, p) transfer reaction, has been undertaken. The measured angular distributions confirm the spin-parity assignments of 1/2+ and 5/2+ for the excited states located at 217 and 335 keV, respectively. The spectroscopic factors deduced for these states exhibit a marked single-particle character, in agreement with shell model and particle-core model calculations, and combined with their near degeneracy in energy provide clear evidence for the absence of the N = 14 sub-shell closure. The very small spectroscopic factor found for the 3/2+ ground state is consistent with theoretical predictions and indicates that the ν1d3/2 strength is carried by unbound states. With a dominant l = 0 valence neutron configuration and a very low separation energy, the 1/2+ excited state is a one-neutron halo candidate.
description: 7 pages, 5 figures, Accepted for publication in Physics Letters B
title: Investigating Controls on Temporal and Spatial Variation of Dissolved Uranium at Springs in Horn Creek Drainage, Grand Canyon National Park, Arizona, USA
Creators: name: Davidson, Collin
Publisher: name: University of Nevada, Las Vegas
publisherIdentifier: https://ror.org/0406gha72
publisherIdentifierScheme: ROR
Year: 2024

description: Groundwater is a critical resource in the Grand Canyon, providing water to local communities, millions of annual visitors, and ecosystems. One major concern for this critical resource is the potential for uranium contamination in conjunction with uranium mining efforts. Upper Horn Bedrock Spring (UHB) in the Horn Creek drainage of the Grand Canyon sits below the oldest uranium mine in the region, Orphan Lode mine. UHB spring contains the highest concentration of dissolved uranium in the region, eclipsing the Maximum Contaminant Level (MCL) set by the USEPA by an order of magnitude on average. This research and recent collaboration with the U. S. Geological Survey (USGS) provide further insight into the hydrogeochemical evolution of the groundwater within the drainage, with an emphasis on trying to understand the temporal and spatial variation of dissolved uranium within groundwater sampled in Horn Creek drainage. This thesis specifically investigates two environmental phenomena surrounding dissolved uranium in the drainage using stable isotopes, multivariate statistical analysis, inverse modeling in PHREEQC, and bivariate analysis. The first phenomenon is the relatively rapid change in dissolved uranium concentration as flow moves downgradient from Upper Horn Bedrock spring to Upper Horn Alluvium spring. Approximately 200 m apart, there is roughly an order of magnitude decrease in dissolved uranium between the two springs. Inverse modeling suggests that water-rock interactions could explain the observed change in uranium concentration if the mineral pyrite is present in trace concentrations along the flow path. Inverse modeling and multivariate analysis also suggest that mixing between UHB and a second spring, East Horn Creek – Battleship, could explain the observed change in chemistry. However, stable isotopes collected in 2013 do not support EHC-BS as a mixing partner. The second phenomenon investigated is the variable concentration of dissolved uranium at UHB over time. Twenty-two samples have measured the concentration of dissolved uranium at Upper Horn Bedrock spring across nearly two decades, with concentrations ranging from 151 ppb to 509 ppb. Results indicate that although there is no trend in dissolved uranium over time, there is a relationship between recent precipitation and dissolved uranium. Bivariate analysis comparing recent precipitation (up to 120 days prior to sample collection) and dissolved uranium indicates that wetter periods 9 to 10 weeks prior to sampling correspond to the lowest concentrations of dissolved uranium recorded since 2003. Drier conditions 9 to 10 weeks prior to sampling correspond to higher concentrations of dissolved uranium, however significant variation is present among these higher concentrations.
Beyond mean-field dynamics of small Bose-Hubbard systems based on the number-conserving phase space approach
Creators: name: Trimborn, F.
name: Witthaut, D.
name: Korsch, H. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The number-conserving quantum phase space description of the Bose-Hubbard model is discussed for the illustrative case of two and three modes, as well as the generalization of the two-mode case to an open quantum system. The phase-space description based on generalized SU(M) coherent states yields a Liouvillian flow in the macroscopic limit, which can be efficiently simulated using Monte Carlo methods even for large systems. We show that this description clearly goes beyond the common mean-field limit. In particular it resolves well-known problems where the common mean-field approach fails, like the description of dynamical instabilities and chaotic dynamics. Moreover, it provides a valuable tool for a semi-classical approximation of many interesting quantities, which depend on higher moments of the quantum state and are therefore not accessible within the common approach. As a prominent example, we analyse the depletion and heating of the condensate. A comparison to methods ignoring the fixed particle number shows that in this case artificial number fluctuations lead to ambiguities and large deviations even for quite simple examples.
description: Significantly enhanced and revised version (20 pages, 20 figures)
Beamforming Optimization for MIMO Wireless Power Transfer with Nonlinear Energy Harvesting: RF Combining versus DC Combining
Creators: name: Shen, Shanpu
name: Clerckx, Bruno
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we study the multiple-input and multiple-output (MIMO) wireless power transfer (WPT) system so as to enhance the output DC power of the rectennas. To that end, we revisit the rectenna nonlinearity considering multiple receive antennas. Two combining schemes for multiple rectennas at the receiver, DC and RF combinings, are modeled and analyzed. For DC combining, we optimize the transmit beamforming, adaptive to the channel state information (CSI), so as to maximize the total output DC power. For RF combining, we compute a closed-form solution of the optimal transmit and receive beamforming. In addition, we propose a practical RF combining circuit using RF phase shifter and RF power combiner and also optimize the analog receive beamforming adaptive to CSI. We also analytically derive the scaling laws of the output DC power as a function of the number of transmit and receive antennas. Those scaling laws confirm the benefits of using multiple antennas at the transmitter or receiver. They also highlight that RF combining significantly outperforms DC combining since it leverages the rectenna nonlinearity more efficiently. Two types of performance evaluations, based on the nonlinear rectenna model and based on realistic and accurate rectenna circuit simulations, are provided. The evaluations demonstrate that the output DC power can be linearly increased by using multiple rectennas at the receiver and that the relative gain of RF combining versus DC combining in terms of the output DC power level is very significant, of the order of 240% in a one-transmit antenna ten-receive antenna setup.
description: 14 pages,9 figures
Study of a Multivariate Technique for the Search of Single Top-Quark Production with sqrt(s) = 8 TeV in the CMS Experiment at CERN
Creators: name: Dogangun, Oktay
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: This work is presenting a study for the search of the single top-quark production in the CMS Experiment at CERN focusing on the s-channel process and muon decay mode as the final state topology, using a multivariate technique based on the Boosted Decision Trees (BDT) algorithm. The study is based on the collision data collected at 8 TeV in the CMS detector with a luminosity of 19.3 fb^(-1).

The multivariate technique is utilized with an optimization procedure for understanding what are the appropriate variables to use for separation of the signal and background events. The BDT output is obtained by optimizing the choice of the input variables by iterating in a feedback loop globally sensitive to the correlation coefficients of the variables. Then, the optimized BDT discriminant is compared with the analysis which was performed without any optimization on the choice of inputs.

It has been investigated that the BDT output does not reveal any significant change in the separating power as the most globally correlated variables are removed, iteratively. Therefore, reducing the variable list in this way can be advantageous since it advances our understanding for the physical meaning of the output classifier. This study is a first consideration for the optimization of the BDT analyses in the single top-quark production and in the next step, this results will be used to fit the data accounting the systematic uncertainties and extract the cross-section for the BDT discriminant obtained so far.
title: The Effect of Dual Source Premotor Cortex Transcranial Direct Current Stimulation on Muscle Fatigue in Hand Muscles
Creators: name: Contini, Valentino
Publisher: name: University of Nevada, Las Vegas
publisherIdentifier: https://ror.org/0406gha72
publisherIdentifierScheme: ROR
Year: 2024

description: Single source transcranial direct current stimulation (tDCS) has been shown to increase the time to task failure (TTF) fatiguing contractions when applied to the dorsolateral prefrontal cortex (DLPFC) and to the primary motor cortex (M1). The primary purpose was to determine whether dual source tDCS delivered bilaterally over the premotor cortices (pmc-tDCS) could increase the TTF of a fatiguing contraction performed by hand muscles. A double-blind, randomized, SHAM-controlled, crossover design was used for this study with each participant performing two experimental sessions held on separate days a week apart. The only difference between the two sessions was the type of stimulation (pmc-tDCS or SHAM; counterbalanced) applied concurrent with the fatiguing contraction. In each experiment, the fatiguing contraction was performed by gripping a manipulandum with the index finger and thumb. This was accomplished by using a precision grip and matching an isometric target equal to 15% of the maximum voluntary contraction (MVC) for as long as possible until task failure. The main findings were: 1) both the TTF and the percentage decline in MVC force did not significantly differ between the pmc-tDCS and SHAM conditions; 2) the rates of increase in electromyographic (EMG) activity, force error, and standard deviation (SD) of force were not significantly different between the pre-tDCS and SHAM conditions; and 3) transfer of motor skill under fatigue was similar between the two stimulation conditions. Collectively, these results suggest that pmc-tDCS does not decrease the rate of muscle fatigue during a sustained isometric contraction of the muscles of the hand.
MOIRCS Deep Survey. II. Clustering Properties of K-band Selected Galaxies in GOODS-North Region
Creators: name: Ichikawa, Takashi
name: Suzuki, Ryuji
name: Tokoku, Chihiro
name: Katsuno-Uchimoto, Yuka
name: Konishi, Masahiro
name: Yoshikawa, Tomohiro
name: Kajisawa, Masaru
name: Ouchi, Masami
name: Hamana, Takashi
name: Akiyama, Masayuki
name: Nishimura, Tetsuo
name: Omata, Koji
name: Tanaka, Ichi
name: Yamada, Toru
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first measurement of clustering properties of low mass galaxies with a stellar mass down to M_*~10^9 Msun at 11.3 show a large bias of b~7.2+-1.3 on scales up to θ~100" or 3.1 comoving Mpc, while blue galaxies with 0.5~10^{10} Msun, we estimate a correlation length and bias to be r_0~4.5 h^{-1} Mpc and b=1.9-3.5, which are much larger than those of low mass (M_*~10^9-10^{10} Msun) galaxies. The comparison of our measurements with analytic CDM models constrains the properties of hosting dark halos, and indicates that the low mass galaxies would be progenitors of galaxies with a typical luminosity of L
description: 15 pages, 11 figures, submitted to PASJ
A compact green Ti:Sapphire astro-comb with 43-GHz repetition frequency
Creators: name: Chae, Eunmi
name: Kambe, Eiji
name: Motohara, Kentaro
name: Izumiura, Hideyuki
name: Doi, Mamoru
name: Yoshioka, Kosuke
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A compact green astro-comb with 43-GHz repetition rate is developed based on a Ti:Sapphire optical frequency comb (OFC) and a mode-selecting cavity. The OFC's large repetition rate of 1.6 GHz eases the requirements for the mode-selecting cavity. Unnecessary frequency-modes of the OFC are suppressed down to $5 \times 10^{-4}$ at 535 nm - 550 nm using a single mode-selecting cavity with 70-MHz linewidth. The radial velocity precision $σ\sim 1.4$ m/s is achieved at the High Dispersion Echelle Spectrosraph for the Okayama 188-cm telescope of the National Astronomical Observatory of Japan using our astro-comb. With further improvements of the mode-selecting cavity and removal of fiber modal noises, our system will provide a simple, compact, and precise astro-comb setup in visible wavelength region.
description: 10 pages, 7 figures
La relazione di sostituibilità tra servizi di telecomunicazione fissa e mobile e l'impatto sulla regolamentazione del servizio universale
Creators: name: Ferrara, Elia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: L'industria delle comunicazioni elettroniche rappresenta attualmente un formidabile fattore di crescita economica in tutto il mondo. Sul piano storico e dell'assetto concorrenziale del mercato, le caratteristiche economiche fondamentali del settore, unitamente a considerazioni di natura più eminentemente politica, hanno tradizionalmente giustificato un intervento estremamente pervasivo del regolatore pubblico: in Europa, per esempio, fino a pochi anni fa, il mercato era dominato da un'unica impresa monopolista di proprietà statale.
Tuttavia, negli ultimi anni, la regolamentazione del settore ha subito profonde innovazioni e l'assetto competitivo del mercato è stato completamento rimodellato e nuovi operatori sono diventati protagonisti, conquistando importanti posizioni. Il mercato ha inoltre conosciuto il grande sviluppo delle tecnologie di comunicazioni veicolate su rete mobile. In un tale scenario, sempre in piena evoluzione, il lavoro presenta un'analisi delle relazioni di sostituibilità tra servizi di rete fissa e di rete mobile, attraverso lo studio dei dati relativi alla domanda in 92 paesi, rappresentativi di tutti i continenti, osservati durante gli anni 1995-2009. Tale analisi conclude per l'esistenza di una robusta relazione di sostituibilità, soprattutto con riferimento ai paesi più ricchi, che sembra essere cresciuta nel tempo, in funzione della massiccia diffusione delle reti di comunicazione mobile. La presenza di sostituibilità fisso-mobile consente di trarre indicazioni per affrontare in maniera innovativa taluni aspetti primari della regolamentazione delle telecomunicazioni, quali l'approccio seguito per la scelta dei soggetti fornitori degli obblighi di servizio universale e il relativo meccanismo di finanziamento.
Constraints on coupling constant between dark energy and dark matter
Creators: name: Jamil, Mubasher
name: Rashid, Muneer Ahmad
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have investigated constraints on the coupling between dark matter and the interacting Chaplygin gas. Our results indicate that the coupling constant $c$ between these two entities can take arbitrary values, which can be either positive or negative, thus giving arbitrary freedom to the inter-conversion between Chaplygin gas and dark matter. Thus our results indicate that the restriction $0
description: 16 Pages, 3 figures
Logics for Multi-Agent Systems Verification
Creators: name: Perelli, Giuseppe
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Nel Capitolo 1 si introduce la logica SL e se ne richiamano i principali risultati di complessità. In particolare, si ricorda che il problema del model-checking è NonElementary-Hard, mentre la soddisfacibilità è indecidibile.
Nel Capitolo 2, prendendo a spunto il divario computazionale tra SL e la logica ATL*, per cui model-checking e soddisfacibilità sono 2ExpTime-Complete, si cerca di stabilire quali siano le caratteristiche sintattiche che rendono la prima fortemente intrattabile. Si introducono dapprima alcuni frammenti sintattici di SL, rispettivamente chiamati Nested-Goal Strategy Logic SL[NG], Boolean-Goal Strategy Logic SL[BG] e One-Goal Strategy Logic SL[1G], ordinati per inclusione dal più grande al più piccolo. Successivamente, si analizza una proprietà modellare, chiamata behavioral, che risulta centrale per l'applicazione di procedure risolutive computazionalmente più convenienti. In particolare, si dimostra che SL[1G] possiede tale proprietà. Tramite la behavioral property, si dimostra che il model-checking e la soddisfacibilità di SL[1G] è 2ExpTime-Complete. Inoltre, si mostra che il model-checking per SL[NG] è già NonElementary-Complete, mentre la soddisfacibilità per SL[BG] è già indecidibile.
Nel Capitolo 3, si applicano alcuni risultati ottenuti al problema della Sintesi Razionale, mostrando che questa ha complessità 2ExpTime-Complete sia nel caso cooperativo, introdotto da Fisman, Kupferman e Loding nel 2010, sia nel caso non-cooperativo, introdotto da Kupferman, Perelli e Vardi nel 2014. Il problema della sintesi è studiato anche nel caso quantitativo, in cui i goal degli agenti sono specificati mediante la logica Objective LTL (OLTL). Anche in questo caso, tramite una riduzione dal caso qualitativo, si è provato che la complessità del problema è 2ExpTime-Complete.
Nel Capitolo 4, si introducono i Pushdown-Concurrent Game Systems (PGS) per la rappresentazione finita di modelli ricorsivi. Per questi modelli è stato studiato il problema del model checking con specifiche in ATL*, mostrando una soluzione in 3ExpTime e un lower-bound in 2ExpSpace.
The Two-dimensional XMM-Newton Group Survey: z<0.012 groups
Creators: name: Finoguenov, Alexis
name: Davis, David S.
name: Zimer, Marc
name: Mulchaey, John S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of the 2-dimensional XMM-Newton Group Survey (2dXGS), an archival study of nearby galaxy groups. In this paper we consider eleven nearby systems (z<0.012) in Mulchaey et al. (2003), which span a broad range in X-ray luminosity from 10^40 to 10^43 ergs/s. We measure the iron abundance and temperature distribution in these systems and derive pressure and entropy maps. We find statistically significant evidence for structure in the entropy and pressure of the gas component of seven groups on the 10-20% level. The XMM-Newton data for the three groups with best statistics also suggest patchy metalicity distributions within the central 20--50 kpc of the brightest group galaxy, probed with 2-10 kpc resolution. This provides insights into the processes associated with thermalization of the stellar mass loss. Analysis of the global properties of the groups reveals a subclass of X-ray faint groups, which are characterized by both higher entropy and lower pressure. We suggest that the merger history of the central elliptical is responsible for both the source and the observed thermodynamical properties of the hot gas of the X-ray faint groups.
description: 18 pages, ApJ, 646, 143, 2006
title: The Influence of Bilateral Dual Source Transcranial Direct Current Stimulation on the Progression of Muscle Fatigue
Creators: name: Clinton, Eliza
Publisher: name: University of Nevada, Las Vegas
publisherIdentifier: https://ror.org/0406gha72
publisherIdentifierScheme: ROR
Year: 2024

description: Transcranial direct current stimulation (tDCS) applied unilaterally to the primary motor cortex (M1) can significantly prolong the time to task failure (TTF) of a fatiguing contraction. The primary purpose of the study was to examine the influence of bilateral dual source tDCS (dstDCS) applied over the left and right M1s (ds-tDCS) on the TTF of a precision grip task. This was accomplished through the utilization of a double-blind, randomized, SHAM-controlled, within-subjects design. Fourteen participants completed two experiments (ds-tDCS and SHAM stimulation conditions) with a seven-day washout period between sessions. Each experiment involved the performance of a sustained isometric fatiguing contraction using a precision grip (index finger and thumb) of the right hand while either ds-tDCS or SHAM stimulation was applied to the left and right M1 by two separate stimulation devices. Participants were directed to match a target force equivalent to 15% of the maximum voluntary contraction (MVC) force for as long as possible (TTF). The main findings were that both the TTF and the percentage decline in MVC force were not significantly different between the ds-tDCS and SHAM stimulation conditions. In addition, the force error, standard deviation (SD) of force, and EMG activity was not significantly different between the ds-tDCS and SHAM stimulation conditions. These findings suggest that ds-tDCS does not reduce the rate of progression of muscle fatigue in a sustained submaximal isometric contraction of hand muscles.