cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ADVANCED SENSING STRUCTURES FOR ELECTROMAGNETIC SECURITY AND BIO-SYSTEM
Creators: name: Seo, Donghyun
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Electrical circuits and systems

description: With the increased use of the internet, artificial intelligence, IoT, and wearable devices, it has become significantly critical to ensure security and confidentiality of information, particularly within these resource-constrained edge devices. The increased attentions to security and confidentially of information led to the development of computationally-secure cryptographic algorithms. At the same time, low-power sensing devices have emerged as highly promising tools for a wide range of technological applications such as diagnostics, physiological monitoring, and healthcare systems. The desire for seamless and continuous monitoring in sensing applications necessitates these devices to be compact in size and exhibit low power consumption, making them suitable for wearable or portable use with batterypowered operation. Keeping this objective in focus, I will structure this dissertation into the subsequent chapters. The first part (Chapter 2) will cover a theoretical analysis of the proposed Co-planar capacitivE Asymmetry SEnsing (CEASE) technique utilizing four on-die top-layer metal plates. Also, it will present the comparison with other sensing methods which are capacitive parallel and inductive sensing technique in terms of detection range through electromagnetic simulation. The second part (Chapters 3) of this this dissertation will involve explore of the concept of capacitive sensing in an IC layout and co-optimizing both the ground plane capacitance and the sensing capacitance to maximize sensitivity. It will present design of the post-processing circuits and systems with ultra-low power for sensing attacks and to prove the efficacy through the post-layout simulation results. Additionally, integration with digital SCA protection and AES-256 crypto core and checking the efficacy of the proposed method using the integrated detection and countermeasure system in post-layout simulations. Next in Chapter 4, we will show the lowest-power and the energy/conversion step time-based RDC for low frequency applications. It will presents the ways to enhance the energy-resolution trade-offs in time-based RDC, improving the rms jitter/phase noise with help of speed-up latches, to achieve higher bit-resolution. Furthermore, the power/performance trade-off in experiment through 3 different design variations optimized towards lowest energy baseline, higher resolution, and process portability tapeout and IC measurements is presented. Finally, in Chapter 5, we will show a novel proposed switchable dual-mode device that combines a high-frequency antenna and a Human Body Communication (HBC) coupler in a single device. The integration of these two modes addresses the limitations of HBC, such as restricted data transmission, and overcomes the drawbacks of signal absorption in the 24GHz frequency band by the human body.
The Environmental Protection Agency and National Institute of Environmental Health Sciences Libraries Internship Program: Its History and an Analysis of Former Interns' Careers
Creators: name: Westmoreland, Laura A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009
Subjects: Library schools--Practice work
National Institutes of Environmental Health Sciences
Librarian--Careers
Surveys--Internship programs
United States. Environmental Protection Agency--Library

description: This study describes the history of the Environmental Protection Agency and National Institute of Environmental Health Sciences Libraries Internship Program contracted through the University of North Carolina's School of Information and Library Science. It also explores former interns' current careers and their perceptions of how the internship affected their careers. Historical information about the internship program was gathered through a review of historical literature and interviews with individuals who played key roles in the internship program over the years. Information regarding former interns' careers and perceptions of the internship program was gathered through a web-based survey. The findings of this study are useful in documenting the history of a program that has played a major role in the School of Information and Library Science at the University of North Carolina at Chapel Hill. Results of the web-based survey indicate that the majority of interns felt very positively about their experiences as interns. More than two-thirds of respondents believed the internship program had either a strong impact or very strong impact on their careers.
Convolution, aggregation and attention based deep neural networks for accelerating simulations in mechanics
Creators: name: Deshpande, Saurabh
name: Sosa, Raúl I.
name: Bordas, Stéphane P. A.
name: Lengiewicz, Jakub
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Deep learning surrogate models are being increasingly used in accelerating scientific simulations as a replacement for costly conventional numerical techniques. However, their use remains a significant challenge when dealing with real-world complex examples. In this work, we demonstrate three types of neural network architectures for efficient learning of highly non-linear deformations of solid bodies. The first two architectures are based on the recently proposed CNN U-NET and MAgNET (graph U-NET) frameworks which have shown promising performance for learning on mesh-based data. The third architecture is Perceiver IO, a very recent architecture that belongs to the family of attention-based neural networks--a class that has revolutionised diverse engineering fields and is still unexplored in computational mechanics. We study and compare the performance of all three networks on two benchmark examples, and show their capabilities to accurately predict the non-linear mechanical responses of soft bodies.
A Content Analysis Study of the Equivalency of Publishers' Easy Reader Leveling Systems
Creators: name: Pierce, Hannah D.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012
Subjects: Readers--Primary--Evaluation
Children's literature--Publishing--United States
Children--Books & reading

description: This study examines the book and text features and language and literary features of easy  reader books. Leveled easy readers published by HarperCollins, Random House, and  Simon & Schuster were analyzed. The results reveal trends in the difficulty of sixteen  book characteristics. The coding scores derived from content analysis were used to  compare the leveling systems employed by the publishers. The study culminated in the  creation of an equivalency chart that can be used to quickly compare the difficulty of  easy readers on each level assigned by HarperCollins, Random House, and Simon &  Schuster. Children's librarians, school media specialists, and parents may use the  equivalency tool developed during this study to assist them in selecting books for  beginning readers.
Additional file 2 of Hsa_circ_0000520 suppresses vasculogenic mimicry formation and metastasis in bladder cancer through Lin28a/PTEN/PI3K signaling
Creators: name: Zhang, Chunyu
name: Hu, Jiao
name: Liu, Zhi
name: Deng, Hao
name: Xiao, Jiatong
name: Yi, Zhenglin
name: He, Yunbo
name: Xiao, Zicheng
name: Huang, Jinliang
name: Liang, Haisu
name: Fan, Benyi
name: Wang, Zhihua
name: Chen, Jinbo
name: Zu, Xiongbing
Publisher: name: figshare
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Statistics
subject: FOS: Mathematics

description: Supplementary Material 2. Figure 2. Verification of the interaction between UBE2V1 and UBC13.co-IP analysis confirms the binding of UBE2V1 to UBC13.co-IP analysis validates the binding of UBC13 to UBE2V1
Extended Delta-map: a map-based foreground removal method for CMB polarization observations
Creators: name: Minami, Yuto
name: Ichiki, Kiyotomo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In order to extract information about inflationary gravitational waves using $B$-mode patterns of cosmic microwave polarization anisotropy, we need to remove the foreground radiation from the Milky Way. In our previous delta-map method for foreground removal, the number of observation bands was limited to the number of parameters of the assumed foreground model, and therefore it was difficult to improve the sensitivity by increasing the number of observation bands. Here, we extend the previous method so that it can be adapted to an arbitrary number of observation bands. Using parametric likelihood and realistic foreground and CMB simulations, we show that our method can increase the sensitivity to the tensor-to-scalar ratio $r$ without inducing any significant bias.
description: 24 pages, 9 figures, 2 tables, matches version published in PTEP
Algebraic Dirac induction for nonholomorphic discrete series of SU(2, 1)
Creators: name: Prlić, Ana
Publisher: name: arXiv
Year: 2015
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: In a joint paper P. Pandžić and D. Renard proved that holomorphic and antiholomorphic discrete series representations can be constructed via algebraic Dirac induction. The group $SU(2,1)$, except for those two types, also has a third type of discrete series representations that are neither holomorphic nor antiholomorphic. In this paper we show that nonholomorphic discrete series representations of the group $SU(2,1)$ can also be constructed using algebraic Dirac induction.
description: 21 pages, references added, minor changes
Adapting corporate culture to accommodate knowledge management
Creators: name: Kellerman, Jennifer A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999
Subjects: Administration--Aims and objetives
Information transfer
Knowledge management

description: The utilization of intellectual assets has emerged as a vital strategic tool for companies to remain competitive in today's global, information-centered economy.  Knowledge management is one method corporations are adopting to improve the distribution and use of information.  Implementing knowledge management into an organization often requires changes to the organization's corporate culture, as traditional corporate structures can hinder the flow of information.  Knowledge management is a versatile tool which can be adapted to an organization's goals and objectives.  No one approach, therefore, is the "right" one.  This research describes the findings of interviews with knowledge workers at three organizations.  The knowledge workers discuss the strategies used in each organization to create an environment conducive to knowledge management and ways to encourage employees to participate in knowledge sharing.
Misspecification in Inverse Reinforcement Learning
Creators: name: Skalse, Joar
name: Abate, Alessandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The aim of Inverse Reinforcement Learning (IRL) is to infer a reward function $R$ from a policy $π$. To do this, we need a model of how $π$ relates to $R$. In the current literature, the most common models are optimality, Boltzmann rationality, and causal entropy maximisation. One of the primary motivations behind IRL is to infer human preferences from human behaviour. However, the true relationship between human preferences and human behaviour is much more complex than any of the models currently used in IRL. This means that they are misspecified, which raises the worry that they might lead to unsound inferences if applied to real-world data. In this paper, we provide a mathematical analysis of how robust different IRL models are to misspecification, and answer precisely how the demonstrator policy may differ from each of the standard models before that model leads to faulty inferences about the reward function $R$. We also introduce a framework for reasoning about misspecification in IRL, together with formal tools that can be used to easily derive the misspecification robustness of new IRL models.
A comparative study of $2d$ Ising model at different boundary conditions using Cellular Automata
Creators: name: Mohammed, Jahangir
name: Mahapatra, Swapna
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using Cellular Automata, we simulate spin systems corresponding to $2d$ Ising model with various kinds of boundary conditions (bcs). The appearance of spontaneous magnetization in the absence of magnetic field is studied with a $64\times64$ square lattice with five different bcs, i.e., periodic, adiabatic, reflexive, fixed ($+1$ or $-1$) bcs with three initial conditions (all spins up, all spins down and random orientation of spins). In the context of $2d$ Ising model, we have calculated the magnetisation, energy, specific heat, susceptibility and entropy with each of the bcs and observed that the phase transition occurs around $T_c$ = 2.269 as obtained by Onsager. We compare the behaviour of magnetisation vs temperature for different types of bcs by calculating the number of points close to the line of zero magnetisation after $T>T_c$ at various lattice sizes. We observe that the periodic, adiabatic and reflexive bcs give closer approximation to the value of $T_c$ than fixed +1 and fixed -1 bcs with all three initial conditions for lattice size less than $70\times70$. However, for lattice size between $70\times70$ and $100\times100$, fixed +1 bc and fixed -1 bc give closer approximation to the $T_c$ with initial conditions all spin down configuration and all spin up configuration respectively.
description: 16 pages, 21 figures
A Natural Language Processing Approach to Analyzing Consultation Visits for Treatment Decision Making for Localized Prostate Cancer
Creators: name: Liu, Yumeng
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018
Subjects: Decision aid
Topic analysis
Natural language processing

description: This quantitative study investigates the information seeking and giving behaviors of doctors, prostate cancer patients and their family members during consultation visits. The dataset was a transcript of audio-recordings of real-time treatment consultations collected from 171 consultation visits in a clinical trial. For text analysis purposes, a question mark in a transcript sentence was used to signal the information seeking behavior while a period was used to signal information giving behavior. Two counting methods were adopted to investigate the effect of a decision aid intervention that was created to facilitate the prostate cancer patient consultation. Data process, cleaning and analysis were performed by Python, which shows the decision aid intervention promoted the patient’s information seeking and giving behavior during the consultations. Topic analysis of specific target population showed different communication styles from Caucasian and African America population. What’s more, the results contribute to the decision aid for patients and training on communications in the clinical visits.
Missing dark matter in dwarf galaxies?
Creators: name: Oman, Kyle A.
name: Navarro, Julio F.
name: Sales, Laura V.
name: Fattahi, Azadeh
name: Frenk, Carlos S.
name: Sawala, Till
name: Schaller, Matthieu
name: White, Simon D. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use cosmological hydrodynamical simulations of the APOSTLE project along with high-quality rotation curve observations to examine the fraction of baryons in ΛCDM haloes that collect into galaxies. This 'galaxy formation efficiency' correlates strongly and with little scatter with halo mass, dropping steadily towards dwarf galaxies. The baryonic mass of a galaxy may thus be used to place a lower limit on total halo mass and, consequently, on its asymptotic maximum circular velocity. A number of observed dwarfs seem to violate this constraint, having baryonic masses up to ten times higher than expected from their rotation speeds, or, alternatively, rotating at only half the speed expected for their mass. Taking the data at face value, either these systems have formed galaxies with extraordinary efficiency - highly unlikely given their shallow potential wells - or their dark matter content is much lower than expected from ΛCDM haloes. This 'missing dark matter' is reminiscent of the inner mass deficit of galaxies with slowly-rising rotation curves, but cannot be explained away by star formation-induced 'cores' in the dark mass profile, since the anomalous deficit applies to regions larger than the luminous galaxies themselves. We argue that explaining the structure of these galaxies would require either substantial modification of the standard Lambda cold dark matter paradigm or else significant revision to the uncertainties in their inferred mass profiles, which should be much larger than reported. Systematic errors in inclination may provide a simple resolution to what would otherwise be a rather intractable problem for the current paradigm.
description: 15 pages, 5 figures, 2 tables, MNRAS accepted version
Resolved near-UV hydrogen emission lines at 40-Myr super-Jovian protoplanet Delorme 1 (AB)b: Indications of magnetospheric accretion
Creators: name: Ringqvist, Simon C.
name: Viswanath, Gayathri
name: Aoyama, Yuhiko
name: Janson, Markus
name: Marleau, Gabriel-Dominique
name: Brandeker, Alexis
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have followed up on our observations of the ~ 40-Myr, and still accreting, PMC Delorme 1 (AB)b. We used high-resolution spectroscopy to characterise the accretion process further by accessing the wealth of emission lines in the near-UV. With VLT/UVES, we obtained R ~ 50000 spectroscopy at 330--452 nm. After separating the emission of the companion from that of the M5 low-mass binary, we performed a detailed emission-line analysis, which included planetary accretion shock modelling. We reaffirm ongoing accretion in Delorme 1 (AB)b and report the first detections in a (super-Jovian) protoplanet of resolved hydrogen line emission in the near-UV (H-gamma, H-delta, H-epsilon, H8 and H9). We tentatively detect H11, H12, He I and Ca II H/K. The analysis strongly favours a planetary accretion shock with a line-luminosity-based accretion rate dMp/dt = 2e-8 MJ/yr. The lines are asymmetric and well described by sums of narrow and broad components with different velocity shifts. Overall line shapes are best explained by a pre-shock velocity v0 = 170+-30 km/s, implying a planetary mass Mp = 13+-5 MJ, and number densities n0 ~ 1e13/cc or n0 ~ 1e11/cc. The higher density implies a small line-emitting area of ~ 1% relative to the planetary surface. This favours magnetospheric accretion, a case potentially strengthened by the presence of blueshifted emission in the asymmetrical profiles.High-resolution spectroscopy offers the opportunity to resolve line profiles, crucial for studying the accretion process in depth. The super-Jovian protoplanet Delorme 1 (AB)b is still accreting at ~ 40 Myr. Thus, Delorme 1 belongs to the growing family of Peter Pan disc systems with protoplanetary and/or circumplanetary disc(s) far beyond the typically assumed disc lifetimes. Further observations of this benchmark companion, and its presumed disc(s), will help answer key questions about the accretion geometry in PMCs.
description: Published in A&A 669, L12, 11 pages, abbreviated abstract
Current State of Media Services in Academic Libraries: Five Case Studies
Creators: name: Durland, William
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2003
Subjects: Film libraries and collections
Media centers Evaluations
Audiovisual library service
College and university libraries Audiovisual materials
Audiovisual materials

description: This paper reports the results of five case studies of media service centers in academic libraries. Five academic libraries with media services were chosen for observation. An attempt was made to determine whether or not media services were providing the kinds of service expected of them by the community. Backed by a review of the literature observations were made to determine whether or not any trends or commons themes were discernable in all the centers. Three aspects were deemed important for media centers--facilities, web sites, and services provided- and each of the five centers was judged on how effectively these criteria were met. While all five media centers provide the basic requirements service remains uneven making it difficult to discern a singular or dominant approach to service. A positive not is those centers that are well funded provide ample resources.
Generalized Drude Scattering rate from the memory function formalism: an independent verification of the Sharapov-Carbotte result
Creators: name: Bhalla, Pankaj
name: Singh, Navinder
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: An explicit perturbative computation of the Mori's memory function was performed by Götze and Wölfle (GW) to calculate Generalized Drude scattering (GDS) rate for the case of electron-impurity and electron-phonon scattering in metals by assuming constant electronic density of states at the Fermi energy. In the present investigation, we go beyond this assumption and extend the GW formalism to the case in which there is a gap around the Fermi surface in electron density of states. The resulting GDS is compared with a recent one by Sharapov and Carbotte (SC) obtained through a different route. We find good agreement between the two at finite frequencies. However, we find discrepancies in the dc scattering rate. These are due to a crucial assumption made in SC namely $ω>> \vert Σ(ε+ω) - Σ^{*}(ε)\vert$. No such high frequency assumption is made in the memory function based technique.
description: 8 pages, 6 figures, manuscript accepted in EPJB
Path separation of dissipation-corrected targeted molecular dynamics simulations of protein-ligand unbinding
Creators: name: Wolf, Steffen
name: Post, Matthias
name: Stock, Gerhard
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Protein-ligand (un)binding simulations are a recent focus of biased molecular dynamics simulations. Such binding and unbinding can occur via different pathways in and out of a binding site. We here present a theoretical framework how to compute kinetics along separate paths and to combine the path-specific rates into global binding and unbinding rates for comparison with experiment. Using dissipation-corrected targeted molecular dynamics in combination with temperature-boosted Langevin equation simulations [Nat. Commun. \textbf{11}, 2918 (2020)] applied to a two-dimensional model and the trypsin-benzamidine complex as test systems, we assess the robustness of the procedure and discuss aspects of its practical applicability to predict multisecond kinetics of complex biomolecular systems.
description: This preprint is the unedited version of a manuscript that has been published in J. Chen. Phys. and can be downloaded for private use only. Copyright with AIP and and the authors
A Researcher's Guide to Ten North Carolina Fiction Writers
Creators: name: Henderson, Heidi
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2000
Subjects: North Carolina--Bio-bibliography
American Fiction--20th Century--Bio-bibliography
North Carolina--biography
Authors, American--20th Century--Bio-bibliography

description: This researcher's guide is an annotated bibliography covering works written about ten contemporary North Carolina fiction writers. The writers are David Drake, Julie Edelson, Ann Underwood Grant, William H. Hooks, Kay Hooper, Margaret Maron, John P. McAfee, Patsy O'Leary, Elizabeth Squire, and Julie Andreson Tetel. The guide provides citations to book reviews, criticism, biographical information, and websites about each author.  The preface includes details about the process of writing such a reference work, as well as a description of the tools one can use to find contemporary authors. The preface also explains the reasoning behind selective annotations.
Algebraic Structures and Stochastic Differential Equations driven by Levy processes
Creators: name: Curry, Charles
name: Ebrahimi-Fard, Kurusch
name: Malham, Simon J. A.
name: Wiese, Anke
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H10, 60H35

description: We construct an efficient integrator for stochastic differential systems driven by Levy processes. An efficient integrator is a strong approximation that is more accurate than the corresponding stochastic Taylor approximation, to all orders and independent of the governing vector fields. This holds provided the driving processes possess moments of all orders and the vector fields are sufficiently smooth. Moreover the efficient integrator in question is optimal within a broad class of perturbations for half-integer global root mean-square orders of convergence. We obtain these results using the quasi-shuffle algebra of multiple iterated integrals of independent Levy processes.
description: 41 pages, 11 figures
Understanding Geographic, Temporal, and Multi-Dimensional Trends Using Visualization in Health Care
Creators: name: Ibeanusi, Nnenna
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Health Informatics
Visual analytics
Information visualization

description: This study sought to determine whether utilizing visualization in health care would allow a wider audience of health professionals to understand geographic, temporal, and multidimensional trends in health data. A visual analytics tool was developed in Tableau that allowed users to dynamically and interactively interact with the tool in order to understand the impact of ACA Medicaid expansion. Data from the County Health Rankings & Roadmap was used (Rankings Data). The tool was made available to 5 participants who all had a connection to health care. An evaluation of the tool was conducted to determine if a visual analytics approach was useful in understanding geographic, temporal, and multidimensional trends and communicating health analytics information through the form of a use case. This study concluded that visualization was in fact an effective means through which to help a variety of users to understand geographic, temporal, and multidimensional trends.
A localized reduced basis approach for unfitted domain methods on parameterized geometries
Creators: name: Chasapi, Margarita
name: Antolin, Pablo
name: Buffa, Annalisa
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This work introduces a reduced order modeling (ROM) framework for the solution of parameterized second-order linear elliptic partial differential equations formulated on unfitted geometries. The goal is to construct efficient projection-based ROMs, which rely on techniques such as the reduced basis method and discrete empirical interpolation. The presence of geometrical parameters in unfitted domain discretizations entails challenges for the application of standard ROMs. Therefore, in this work we propose a methodology based on i) extension of snapshots on the background mesh and ii) localization strategies to decrease the number of reduced basis functions. The method we obtain is computationally efficient and accurate, while it is agnostic with respect to the underlying discretization choice. We test the applicability of the proposed framework with numerical experiments on two model problems, namely the Poisson and linear elasticity problems. In particular, we study several benchmarks formulated on two-dimensional, trimmed domains discretized with splines and we observe a significant reduction of the online computational cost compared to standard ROMs for the same level of accuracy. Moreover, we show the applicability of our methodology to a three-dimensional geometry of a linear elastic problem.
description: 35 pages, 19 figures, 5 tables. Preprint accepted in Computer Methods in Applied Mechanics and Engineering
Which Hashtag to use? Building a Hashtag recommender system and understanding the textual features surrounding Hashtags
Creators: name: Avula, Sandeep
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Information retrieval--Social aspects
Information retrieval
Information retrieval--Evaluation

description: Hashtags are community-based tags on twitter that are used to annotate tweets and make them findable. To make a user's participation on the social platform more relevant, recommending a hashtag would help a user participate better. This study is an attempt to build a recommender system for hashtag recommendation, and to further study the textual features around hashtags, which assist in their retrieval. The suggested system performs better for tweets with longer text; those with a URL, with multiple hashtags and those that have user mentions.
Push-the-Boundary: Boundary-aware Feature Propagation for Semantic Segmentation of 3D Point Clouds
Creators: name: Du, Shenglan
name: Ibrahimli, Nail
name: Stoter, Jantien
name: Kooij, Julian
name: Nan, Liangliang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Feedforward fully convolutional neural networks currently dominate in semantic segmentation of 3D point clouds. Despite their great success, they suffer from the loss of local information at low-level layers, posing significant challenges to accurate scene segmentation and precise object boundary delineation. Prior works either address this issue by post-processing or jointly learn object boundaries to implicitly improve feature encoding of the networks. These approaches often require additional modules which are difficult to integrate into the original architecture. To improve the segmentation near object boundaries, we propose a boundary-aware feature propagation mechanism. This mechanism is achieved by exploiting a multi-task learning framework that aims to explicitly guide the boundaries to their original locations. With one shared encoder, our network outputs (i) boundary localization, (ii) prediction of directions pointing to the object's interior, and (iii) semantic segmentation, in three parallel streams. The predicted boundaries and directions are fused to propagate the learned features to refine the segmentation. We conduct extensive experiments on the S3DIS and SensatUrban datasets against various baseline methods, demonstrating that our proposed approach yields consistent improvements by reducing boundary errors. Our code is available at https://github.com/shenglandu/PushBoundary.
description: 3DV2022
Estimation of low energy neutron flux ($E_n\leq15$ MeV) in India-based Neutrino Observatory cavern using Monte Carlo techniques
Creators: name: Dokania, N.
name: Singh, V.
name: Mathimalar, S.
name: Garai, A.
name: Nanal, V.
name: Pillay, R. G.
name: Bhushan, K. G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The neutron flux at low energy ($E_n\leq15$ MeV) resulting from the radioactivity of the rock in the underground cavern of the India-based Neutrino Observatory is estimated using Geant4-based Monte Carlo simulations. The neutron production rate due to the spontaneous fission of $^{235, 238}$U, $^{232}$Th and ($α, n$) interactions in the rock is determined employing the actual rock composition. It is been shown that the total flux is equivalent to a finite size cylindrical rock ($D=L=140$ cm) element. The energy integrated neutron flux thus obtained at the centre of the underground tunnel is 2.76 (0.47) $\times 10^{-6}\rm~n ~cm^{-2}~s^{-1}$. The estimated neutron flux is of the same order ($\sim10^{-6}\rm~n ~cm^{-2}~s^{-1}$)~as measured in other underground laboratories.
description: 12 pages, 9 figures, minor corrections from v1
Approximately stealth black hole in higher-order scalar-tensor theories
Creators: name: De Felice, Antonio
name: Mukohyama, Shinji
name: Takahashi, Kazufumi
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate a generic quadratic higher-order scalar-tensor theory with a scordatura term, which is expected to provide a consistent perturbative description of stealth solutions with a timelike scalar field profile. In the DHOST subclass, exactly stealth solutions are known to yield perturbations infinitely strongly coupled and thus cannot be trusted. Beyond DHOST theories with the scordatura term, such as in ghost condensation and U-DHOST, we show that stealth configurations cannot be realized as exact solutions but those theories instead admit approximately stealth solutions where the deviation from the exactly stealth configuration is controlled by the mass scale $M$ of derivative expansion. The approximately stealth solution is time-dependent, which can be interpreted as the black hole mass growth due to the accretion of the scalar field. From observed astrophysical black holes, we put an upper bound on $M$ as $\hat{c}_{\rm D1}^{1/2} M\lesssim 2\times 10^{11}$ GeV, where $\hat{c}_{\rm D1}$ is a dimensionless parameter of order unity that characterizes the scordatura term. As far as $M$ is sufficiently below the upper bound, the accretion is slow and the approximately stealth solutions can be considered as stealth at astrophysical scales for all practical purposes while perturbations are weakly coupled all the way up to the cutoff $M$ and the apparent ghost is as heavy as or heavier than $M$.
description: 10 pages
A Study of the Availability of Health Information for Teens on North Carolina Public Library Websites
Creators: name: Torp, Kaitlin N.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011
Subjects: Young adults' library services--Aims and objectives
Health--Internet resources
Public libraries--North Carolina

description: A large portion of teens not only get their health information from the internet but make health related decisions based on that information. Many teens are encumbered in their internet searches by filters on their school computers and monitoring parents in their homes. The public library provides an internet access point for teens free of filtering and monitoring. The public library has a history of providing health information to patrons, and many public libraries have extended that service to providing health information on the library webpages. This study sought to discover how much health information was provided specifically for teens on public library websites in North Carolina (a state with a high teen pregnancy rate and a high rate of teen HIV/AIDS diagnoses). The study showed that only 14.3% of public library websites provided health information specifically for teens, which is not enough.
Additional file 5 of Identification of HDAC10 as a candidate oncogene in clear cell renal carcinoma that facilitates tumor proliferation and metastasis
Creators: name: Yang, Luojia
name: Wei, Qin
name: Chen, Xinran
name: Yang, Yang
name: Huang, Qingbo
name: Wang, Baojun
name: Ma, Xin
Publisher: name: figshare
Year: 2024
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Supplementary Material 5
Fast and accurate predictions of covalent bonds in chemical space
Creators: name: Chang, K. Y. Samuel
name: Fias, Stijn
name: Ramakrishnan, Raghunathan
name: von Lilienfeld, O. Anatole
Publisher: name: arXiv
Year: 2015
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We assess the predictive accuracy of perturbation theory based estimates of changes in covalent bonding due to linear alchemical interpolations among molecules. We have investigated $σ$ bonding to hydrogen, as well as $σ$ and $π$ bonding between main-group elements, occurring in small sets of iso-valence-electronic molecular species with elements drawn from second to fourth rows in the $p$-block of the periodic table. Numerical evidence suggests that first order estimates of covalent bonding potentials can achieve chemical accuracy if (i) the alchemical interpolation is vertical (fixed geometry), (ii) involves molecules containing elements in the third and fourth row of the periodic table, and (iii) a reference geometry is optimized. In this case, changes in the bonding potential become near-linear in coupling parameter, resulting in analytical predictions with very high accuracy ($\sim$1 kcal/mol). Second order estimates deteriorate the prediction. If initial and final molecules differ not only in composition but also in geometry, all estimates become substantially worse, with second order being slightly more accurate than first order. The independent particle approximation to the second order perturbation performs poorly when compared to the coupled perturbed or finite difference approach. Taylor series expansions up to fourth order of the potential energy curve of highly symmetric systems indicate a finite radius of convergence, as illustrated for the alchemical stretching of H$_2^+$. Numerical results are presented for covalent bonds to hydrogen in 12 molecules with 8 valence electrons; (ii) main-group single bonds in 9 molecules with 14 valence electrons; (iii) main-group double bonds in 9 molecules with 12 valence electrons; (iv) main-group triple bonds in 9 molecules with 10 valence electrons; (v) H$_2^+$ single bond with 1 electron.
IndIGO and LIGO-India: Scope and Plans for Gravitational Wave Research and Precision Metrology in India
Creators: name: Unnikrishnan, C. S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Initiatives by the IndIGO (Indian Initiative in Gravitational Wave Observations) Consortium during the past three years have materialized into concrete plans and project opportunities for instrumentation and research based on advanced interferometer detectors . With the LIGO-India opportunity, this initiative has a taken a promising path towards significant participation in gravitational wave (GW) astronomy and research, and in developing and nurturing precision fabrication and measurement technologies in India. The proposed LIGO-India detector will foster integrated development of frontier GW research in India and will provide opportunity for substantial contributions to global GW research and astronomy. Widespread interest and enthusiasm about these developments in premier research and educational institutions in India lead to the expectation that there will be a grand surge of activity in precision metrology, instrumentation, data handling and computation etc. in the context of LIGO-India. I discuss the scope of such research in the backdrop of the IndIGO action plan and the LIGO-India project.
description: 23 pages, 7 figures, Fifth ASTROD Symposium, Raman Research Institute, Bangalore, July 2012. LIGO document P1200166
Systematic study of one-loop realizations of $d=7$ long-range $0νββ$ decay operators
Creators: name: Chen, Ping-Tao
name: Ding, Gui-Jun
name: Yao, Chang-Yuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the systematical one-loop decomposition of the dimension-7 long-range $0νββ$ decay operators. We find that there are 3 genuine one-loop topologies and 8 diagrams. The procedure to determine the SM quantum number assignments for both internal and external fields is presented. The Majorana neutrino mass in long-range $0νββ$ models is discussed. We also present a one-loop $0νββ$ decay model which produces Majorana neutrino mass at three-loop level. The phenomenological predictions for light neutrino mass and $0νββ$ decay half-life time including both mass mechanism and long-range contribution are studied.
description: 42 pages, 19 figures
Intricacies of Cosmological bounce in polynomial metric $f(R)$ gravity for flat FLRW spacetime
Creators: name: Bhattacharya, Kaushik
name: Chakrabarty, Saikat
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we present the techniques for computing cosmological bounces in polynomial $f(R)$ theories, whose order is more than two, for spatially flat FLRW spacetime. In these cases the conformally connected Einstein frame shows up multiple scalar potentials predicting various possibilities of cosmological evolution in the Jordan frame where the $f(R)$ theory lives. We present a reasonable way in which one can associate the various possible potentials in the Einstein frame, for cubic $f(R)$ gravity, to the cosmological development in the Jordan frame. The issue concerning the energy conditions in $f(R)$ theories is presented. We also point out the very important relationships between the conformal transformations connecting the Jordan frame and the Einstein frame and the various instabilities of $f(R)$ theory. All the calculations are done for cubic $f(R)$ gravity but we hope the results are sufficiently general for higher order polynomial gravity.
description: 28 pages, latex file, 6 figures. The new file has minor changes. The present manuscript is accepted for publication in JCAP
Spam Detection on Twitter: A Comparison between Content-based and Graph-based Features
Creators: name: Zhao, Wanchun
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Graph-based
Content-based
Spam detection

description: The popularity of social media has triggered the development of spammers, which produces useless information and costs normal user more time in information seeking process. In this paper, Twitter is studied as an example of spam detection in social media. Using Twitter APIs, content-based and graph-based features were extracted from datasets and analyzed with users' level of spam. Combining two kinds of features with J48, NaïveBayes and SVM classifiers, content-based features with J48 have the best performance in evaluation.
Topological order in interacting semimetals
Creators: name: Yi, Jinmin
name: Ying, Xuzhe
name: Gioia, Lei
name: Burkov, A. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It has recently been demonstrated that it is possible to open a gap in a magnetic Weyl semimetal, while preserving the chiral anomaly along with the charge conservation and translational symmetries, which all protect the gapless nodes in a weakly interacting semimetal. The resulting state was shown to be a nontrivial generalization of a nonabelian fractional quantum Hall liquid to three dimensions. Here we point out that a second fractional quantum Hall state exists in this case. This state has exactly the same electrical and thermal Hall responses as the first, but a distinct (fracton) topological order. Moreover, the existence of this second fractional quantum Hall state necessarily implies a gapless phase, which has identical topological response to a noninteracting Weyl semimetal, but is distinct from it. This may be viewed as a generalization (in a weaker form) of the known duality between a noninteracting two-dimensional Dirac fermion and QED$_3$ to $3+1$ dimensions. In addition we discuss a $(3+1)$-dimensional topologically ordered state, obtained by gapping a nodal line semimetal without breaking symmetries.
description: 10 pages, 1 figure, published version
Staircase diagrams and enumeration of smooth Schubert varieties
Creators: name: Richmond, Edward
name: Slofstra, William
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14M15, 14N15, 05A15, 20F55, 22E40

description: We enumerate smooth and rationally smooth Schubert varieties in the classical finite types A, B, C, and D, extending Haiman's enumeration for type A. To do this enumeration, we introduce a notion of staircase diagrams on a graph. These combinatorial structures are collections of steps of irregular size, forming interconnected staircases over the given graph. Over a Dynkin-Coxeter graph, the set of "nearly-maximally labelled" staircase diagrams is in bijection with the set of Schubert varieties with a complete Billey-Postnikov (BP) decomposition. We can then use an earlier result of the authors showing that all finite-type rationally smooth Schubert varieties have a complete BP decomposition to finish the enumeration.
description: 42 pages, 3 tables
On the unusual Stokes shift in the smallest PPE dendrimer building block: Role of the vibronic symmetry on the band origin?
Creators: name: Galiana, Joachim
name: Lasorne, Benjamin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: 1,3-bis(phenylethynyl)benzene is the primary chromophore of light-harvesting polyphenylene ethynylene (PPE) dendrimers. It is experimentally known to share the same absorption spectrum as its pair of diphenylacetylene (aka. tolane) meta-substituted branches, yet exhibits an unusual Stokes shift of about 2000 cm$^{-1}$ with respect to its band origin (corresponding to the loss of one vibrational quantum within the antisymmetric acetylenic stretching) in its emission spectrum. We suggest in the present work the unusual but plausible involvement of molecular symmetry selection rules in a situation where the Born-Oppenheimer approximation is far to be valid. Our hypothesis is comforted with quantum dynamics (MCTDH) simulations of absorption and emission UV-visible spectra based on quantum chemistry (TD-DFT) data and a diabatic vibronic coupling Hamiltonian model.
description: 15 pages of manuscript, 15 pages of supplementary information