Publications (116)
Wall and Chamber Structure for finite-dimensional Algebras
Thomas Brüstle, David Smith, Hipolito Treffinger
We use -tilting theory to give a description of the wall and chamber structure of a finite dimensional algebra. We also study -generic paths in the wall and chamb…
A numerical implementation of the unified Fokas transform for evolution problems on a finite interval
Emine Kesici, Beatrice Pelloni, Tristan Pryer +1
We present the numerical solution of two-point boundary value problems for a third order linear PDE, representing a linear evolution in one space dimension. The difficulty of this…
Economic Impacts of Climate Change in the United States: Integrating and Harmonizing Evidence from Recent Studies
Elizabeth Kopits, Daniel Kraynak, Bryan Parthum +5
This paper synthesizes evidence on climate change impacts specific to U.S. populations. We develop an apples-to-apples comparison of econometric studies that empirically estimate t…
Energy Storage Sharing in Smart Grid: A Modified Auction Based Approach
Wayes Tushar, Bo Chai, Chau Yuen +4
This paper studies the solution of joint energy storage (ES) ownership sharing between multiple shared facility controllers (SFCs) and those dwelling in a residential community. Th…
Computational Microwave Imaging Using 3D Printed Conductive Polymer Frequency-Diverse Metasurface Antennas
Okan Yurduseven, Patrick Flowers, Shengrong Ye +5
A frequency-diverse computational imaging system synthesized using three-dimensional (3D) printed frequency-diverse metasurface antennas is demonstrated. The 3D fabrication of the…
Citations as Queries: Source Attribution Using Language Models as Rerankers
Ryan Muther, David Smith
This paper explores new methods for locating the sources used to write a text, by fine-tuning a variety of language models to rerank candidate sources. After retrieving candidates…
The Cost of Privacy in Asynchronous Differentially-Private Machine Learning
Farhad Farokhi, Nan Wu, David Smith +1
We consider training machine learning models using Training data located on multiple private and geographically-scattered servers with different privacy settings. Due to the distri…
Cosmological Constraints on Theories with Large Extra Dimensions
Lawrence J. Hall, David Smith
In theories with large extra dimensions, constraints from cosmology lead to non-trivial lower bounds on the fundamental scale M_F, corresponding to upper bounds on the radii of the…
Robustness to Model Uncertainties Drives More Rapid CO2 Emissions Reductions
Lisa Rennels, Frank Errickson, David Smith +3
Evaluating the economic impacts of climate policies is important for designing a response to climate change. One typical approach to assessing mitigation policy options uses integr…
Distributed Data Compression in Sensor Clusters: A Maximum Independent Flow Approach
Ni Ding, Parastoo Sadeghi, David Smith +1
Let a cluster (network) of sensors be connected by the communication links, each link having a capacity upper bound. Each sensor observes a discrete random variable in private and…
Learn to Unlearn: A Survey on Machine Unlearning
Youyang Qu, Xin Yuan, Ming Ding +3
Machine Learning (ML) models have been shown to potentially leak sensitive information, thus raising privacy concerns in ML-driven applications. This inspired recent research on re…
Developments in Performance and Portability for MadGraph5_aMC@NLO
Andrea Valassi, Taylor Childers, Laurence Field +6
Event generators simulate particle interactions using Monte Carlo techniques, providing the primary connection between experiment and theory in experimental high energy physics. Th…
Adaptive Clipping for Privacy-Preserving Few-Shot Learning: Enhancing Generalization with Limited Data
Kanishka Ranaweera, Dinh C. Nguyen, Pubudu N. Pathirana +4
In the era of data-driven machine-learning applications, privacy concerns and the scarcity of labeled data have become paramount challenges. These challenges are particularly prono…
Switch-based Hybrid Beamforming for Massive MIMO Communications in mmWave Bands
Hamed Nosrati, Elias Aboutanios, Xiangrong Wang +1
Switch-based hybrid network is a promising implementation for beamforming in large-scale millimetre wave (mmWave) antenna arrays. By fully exploiting the sparse nature of the mmWav…
Peer-to-Peer Trading in Electricity Networks: An Overview
Wayes Tushar, Tapan K. Saha, Chau Yuen +2
Peer-to-peer trading is a next-generation energy management technique that economically benefits proactive consumers (prosumers) transacting their energy as goods and services. At…
Stability conditions, -tilting Theory and Maximal Green Sequences
Thomas Brüstle, David Smith, Hipolito Treffinger
Extending the notion of maximal green sequences to an abelian category, we characterize the stability functions, as defined by Rudakov, that induce a maximal green sequence in an a…
Towards a Theory of Flavor from Orbifold GUTs
Lawrence Hall, John March-Russell, Takemichi Okui +1
We show that the recently constructed 5-dimensional supersymmetric orbifold GUT models allow an appealing explanation of the observed hierarchical structure…
WhoSaidIt: Human-LLM Collaborative Annotation for Text-Based Multilingual Speaker-Attribute Classification
Lingyu Gao, Will Monroe, David Smith +2
Annotating speaker attributes from text is inherently ambiguous, particularly in multilingual settings where demographic and social cues are implicit and culturally variable. We pr…
Federated Learning with Differential Privacy: An Utility-Enhanced Approach
Kanishka Ranaweera, Dinh C. Nguyen, Pubudu N. Pathirana +4
Federated learning has emerged as an attractive approach to protect data privacy by eliminating the need for sharing clients' data while reducing communication costs compared with…
Towards Blockchain-Assisted Privacy-Aware Data Sharing For Edge Intelligence: A Smart Healthcare Perspective
Youyang Qu, Lichuan Ma, Wenjie Ye +4
The popularization of intelligent healthcare devices and big data analytics significantly boosts the development of smart healthcare networks (SHNs). To enhance the precision of di…
GUT Breaking on the Brane
Yasunori Nomura, David Smith, Neal Weiner
We present a five-dimensional supersymmetric SU(5) theory in which the gauge symmetry is broken maximally (i.e. at the 5D Planck scale M_*) on the same 4D brane where chiral matter…
Price discrimination for energy trading in smart grid: A game theoretic approach
Wayes Tushar, Chau Yuen, David Smith +1
Pricing schemes are an important smart grid feature to affect typical energy usage behavior of energy users (EUs). However, most existing schemes use the assumption that a buyer pa…
LookUP: Vision-Only Real-Time Precise Underground Localisation for Autonomous Mining Vehicles
Fan Zeng, Adam Jacobson, David Smith +3
A key capability for autonomous underground mining vehicles is real-time accurate localisation. While significant progress has been made, currently deployed systems have several li…
Friezes, Strings and Cluster Variables
Ibrahim Assem, Grégoire Dupont, Ralf Schiffler +1
To any walk in a quiver, we associate a Laurent polynomial. When the walk is the string of a string module over a 2-Calabi-Yau tilted algebra, we prove that this Laurent polynomial…
Filtering subcategories of modules of an artinian algebra
François Huard, Marcelo Lanzilotta, David Smith
Let be an artinian algebra, and let be a subcategory of mod that is closed under extensions. When is closed under kernels of epimorphisms (or clo…
Skew group algebras of piecewise hereditary algebras are piecewise hereditary
Julie Dionne, Marcelo Lanzilotta, David Smith
We show that the main results of Happel-Rickard-Schofield (1988) and Happel-Reiten-Smalo (1996) on piecewise hereditary algebras are coherent with the notion of group action on an…
Engineering Social Optimality via Utility Shaping in Non-Cooperative Games under Incomplete Information and Imperfect Monitoring
David Smith, Jie Dong, Yizhou Yang
In this paper, we study decentralized decision-making where agents optimize private objectives under incomplete information and imperfect public monitoring, in a non-cooperative se…
Planning under Continuous Time and Resource Uncertainty: A Challenge for AI
John Bresina, Richard Dearden, Nicolas Meuleau +3
We outline a class of problems, typical of Mars rover operations, that are problematic for current methods of planning under uncertainty. The existing methods fail because they suf…
Localized Fermions and Anomaly Inflow via Deconstruction
Witold Skiba, David Smith
We study fermion localization in gauge theory space. We consider four dimensional product gauge groups in which light chiral fermions transform under different gauge factors of the…
Why Couldn't You do that? Explaining Unsolvability of Classical Planning Problems in the Presence of Plan Advice
Sarath Sreedharan, Siddharth Srivastava, David Smith +1
Explainable planning is widely accepted as a prerequisite for autonomous agents to successfully work with humans. While there has been a lot of research on generating explanations…
Optimal Limited Contingency Planning
Nicolas Meuleau, David Smith
For a given problem, the optimal Markov policy can be considerred as a conditional or contingent plan containing a (potentially large) number of branches. Unfortunately, there are…
Frises
Ibrahim Assem, Christophe Reutenauer, David Smith
Each acyclic graph, and more generally, each acyclic orientation of the graph associated to a Cartan matrix, allows to define a so-called frise; this is a collection of sequences o…
Flavor at the TeV Scale with Extra Dimensions
Nima Arkani-Hamed, Lawrence Hall, David Smith +1
Theories where the Standard Model fields reside on a 3-brane, with a low fundamental cut-off and extra dimensions, provide alternative solutions to the gauge hierarchy problem. How…
Human sperm cells swimming in micro-channels
Petr Denissenko, Vasily Kantsler, David Smith +1
The migratory abilities of motile human spermatozoa in vivo are essential for natural fertility, but it remains a mystery what properties distinguish the tens of cells which find a…
The Dynamics of Human and AI-Generated Language: How Semantics Fluctuates across Different Timescales
Han-Jen Chang, Yasir Ãatal, Angelika Wolman +5
Spoken language, whether produced by humans or large language models (LLM), unfolds over time with varying semantic content. However, we still lack simple, interpretable time-serie…
Exponentially Small Supersymmetry Breaking from Extra Dimensions
Nima Arkani-Hamed, Lawrence Hall, David Smith +1
The supersymmetric ``shining'' of free massive chiral superfields in extra dimensions from a distant source brane can trigger exponentially small supersymmetry breaking on our bran…
Cost Minimization of Charging Stations with Photovoltaics: An Approach with EV Classification
Wayes Tushar, Chau Yuen, Shisheng Huang +2
This paper proposes a novel electric vehicle (EV) classification scheme for a photovoltaic (PV) powered EV charging station (CS) that reduces the effect of intermittency of electri…
The Application of Non-Cooperative Stackelberg Game Theory in Behavioral Science: Social Optimality with any Number of Players
Jie Dong, Nicole Sawyer, David Smith
Here we present a ground-breaking new postulate for game theory. The first part of this postulate contains the axiomatic observation that all games are created by a designer, wheth…
Locating the LCROSS Impact Craters
William Marshall, Mark Shirley, Zachary Moratto +9
The Lunar CRater Observations and Sensing Satellite (LCROSS) mission impacted a spent Centaur rocket stage into a permanently shadowed region near the lunar south pole. The Sheperd…
Finite Radiative Electroweak Symmetry Breaking from the Bulk
Nima Arkani-Hamed, Lawrence Hall, Yasunori Nomura +2
A new physical origin for electroweak symmetry breaking is proposed, involving compact spatial dimensions of scale 1/R \approx 1 TeV. The higher dimensional theory is supersymmetri…
Infinite friezes and triangulations of the strip
David Smith
The infinite friezes of positive integers were introduced by Tschabold as a variation of the classical Conway-Coxeter frieze patterns. These infinite friezes were further shown be…
A Mathematical Foundation for the Numberlink Game
Andrea Arauza Rivera, Matt McClinton, David Smith
Numberlink is a puzzle game in which players are given a grid with nodes marked with a natural number, , and asked to create connections with neighboring nodes. Connections…
U-BeAS: A Stackelberg Game for Device-to-Device Communications
Nicole Sawyer, David Smith
User-behavior-aware communications will be a key feature of future generation cellular networks, so user experience is enhanced with greater benefit to users. In this paper, a user…
Multi-Objective Optimization for Privacy-Utility Balance in Differentially Private Federated Learning
Kanishka Ranaweera, David Smith, Pubudu N. Pathirana +3
Federated learning (FL) enables collaborative model training across distributed clients without sharing raw data, making it a promising approach for privacy-preserving machine lear…
Small Neutrino Masses from Supersymmetry Breaking
Nima Arkani-Hamed, Lawrence Hall, Hitoshi Murayama +2
An alternative to the conventional see-saw mechanism is proposed to explain the origin of small neutrino masses in supersymmetric theories. The masses and couplings of the right-ha…
Prioritizing Consumers in Smart Grid: A Game Theoretic Approach
Wayes Tushar, Jian A. Zhang, David Smith +2
This paper proposes an energy management technique for a consumer-to-grid system in smart grid. The benefit to consumers is made the primary concern to encourage consumers to parti…
Opportunistic Relaying in Wireless Body Area Networks: Coexistence Performance
Jie Dong, David Smith
In this paper, a cooperative two-hop communication scheme, together with opportunistic relaying (OR), is applied within a mobile wireless body area network (WBAN). Its effectivenes…
Realistic Differentially-Private Transmission Power Flow Data Release
David Smith, Frederik Geth, Elliott Vercoe +5
For the modeling, design and planning of future energy transmission networks, it is vital for stakeholders to access faithful and useful power flow data, while provably maintaining…
Radio emissions from double RHESSI TGFs
Andrew Mezentsev, Nikolai Ãstgaard, Thomas Gjesteland +5
A detailed analysis of Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) terrestrial gamma ray flashes (TGFs) is performed in association with World Wide Lightning Loca…
Imitative Trust versus Indirect Reciprocity
Serguei Saavedra, David Smith, Felix Reed-Tsochas
This paper has been withdrawn by the authors.
Report on the First HIPstIR Workshop on the Future of Information Retrieval
Laura Dietz, Bhaskar Mitra, Jeremy Pickens +21
The vision of HIPstIR is that early stage information retrieval (IR) researchers get together to develop a future for non-mainstream ideas and research agendas in IR. The first ite…
Lifted Region-Based Belief Propagation
David Smith, Parag Singla, Vibhav Gogate
Due to the intractable nature of exact lifted inference, research has recently focused on the discovery of accurate and efficient approximate inference algorithms in Statistical Re…
ShipwreckFinder: A QGIS Tool for Shipwreck Detection in Multibeam Sonar Data
Anja Sheppard, Tyler Smithline, Andrew Scheffer +5
In this paper, we introduce ShipwreckFinder, an open-source QGIS plugin that detects shipwrecks from multibeam sonar data. Shipwrecks are an important historical marker of maritime…
Relativistically smeared X-ray reprocessed components in the GINGA spectra of GS 2023+338
Piotr Zycki, Chris Done, David Smith
We present results of spectral analysis of Ginga data obtained during the decline phase after the 1989 outburst of GS 2023+338 (V404 Cyg). Our analysis includes detailed modelling…
Management of Renewable Energy for A Shared Facility Controller in Smart Grid
Wayes Tushar, Jian Andrew Zhang, Chau Yuen +2
This paper proposes an energy management scheme to maximize the use of solar energy in the smart grid. In this context, a shared facility controller (SFC) with a number of solar ph…
X-ray and soft gamma-ray spectra of Broad-Line Radio Galaxies
Przemyslaw R. Wozniak, Andrzej A. Zdziarski, David Smith +2
We study X-ray and soft gamma-ray spectral properties of BLRGs using data from Ginga, ASCA, OSSE and EXOSAT. The X-ray spectra are well fitted by an intrinsic power-law continuum w…
Flat-face approximations of invisibility cloaks with planar metamaterial layers
Oliver Paul, Yaroslav Urzhumov, Christoffer Elsen +2
Transformation optics (TO) is a powerful tool for the design of artiffcial materials with unprecedented optical properties. Here, we propose the approximation of TO structures of a…
A chiral aperiodic monotile
David Smith, Joseph Samuel Myers, Craig S. Kaplan +1
The recently discovered "hat" aperiodic monotile mixes unreflected and reflected tiles in every tiling it admits, leaving open the question of whether a single shape can tile aperi…
Seeing the Fruit for the Leaves: Robotically Mapping Apple Fruitlets in a Commercial Orchard
Ans Qureshi, David Smith, Trevor Gee +12
Aotearoa New Zealand has a strong and growing apple industry but struggles to access workers to complete skilled, seasonal tasks such as thinning. To ensure effective thinning and…
Look how they have grown: Non-destructive Leaf Detection and Size Estimation of Tomato Plants for 3D Growth Monitoring
Yuning Xing, Dexter Pham, Henry Williams +5
Smart farming is a growing field as technology advances. Plant characteristics are crucial indicators for monitoring plant growth. Research has been done to estimate characteristic…
Model Elicitation through Direct Questioning
Sachin Grover, David Smith, Subbarao Kambhampati
The future will be replete with scenarios where humans are robots will be working together in complex environments. Teammates interact, and the robot's interaction has to be about…
Inelastic Dark Matter
David Smith, Neal Weiner
Many observations suggest that much of the matter of the universe is non-baryonic. Recently, the DAMA NaI dark matter direct detection experiment reported an annual modulation in t…
Tradeoffs in Resampling and Filtering for Imbalanced Classification
Ryan Muther, David Smith
Imbalanced classification problems are extremely common in natural language processing and are solved using a variety of resampling and filtering techniques, which often involve ma…
Pre-Editorial Normalization for Automatically Transcribed Medieval Manuscripts in Old French and Latin
Thibault Clérice, Rachel Bawden, Anthony Glaise +2
Recent advances in Automatic Text Recognition (ATR) have improved access to historical archives, yet a methodological divide persists between palaeographic transcriptions and norma…
The Value of Collaboration in Convex Machine Learning with Differential Privacy
Nan Wu, Farhad Farokhi, David Smith +1
In this paper, we apply machine learning to distributed private data owned by multiple data owners, entities with access to non-overlapping training datasets. We use noisy, differe…
FPGA-Accelerated Real-Time Diagnostics at DIII-D Using the SLAC Neural Network Library for ML Inference
Abhilasha Dave, Semin Joung, SangKyeun Kim +11
In this work, we demonstrate the deployment of a hardware-accelerated machine learning (ML) inference system integrated into a real-time processing at the DIII-D tokamak fusion rea…
Wavelength-Dependent Evolution of Full-Field Transfer Matrices in Photonic Lanterns
Caleb Dobias, Miguel Römer, Swati Bhargava +10
A fiber-based photonic lantern can couple an array of single-mode optical fibers to the guided modes of a multimode fiber, with the mapping between the single-mode fibers and guide…
A saturation-absorption rubidium magnetometer with multilevel optical Bloch-equation modeling for intermediate-to-high fields
Mayand Dangi, Prateek Rajan Gupta, Joseph Kasti +5
We present SASHMAG (Saturated Absorption Spectroscopy High-field MAGnetometer), an atomic sensor designed for precision magnetic-field measurements in the intermediate-to-high fiel…
Polarizability Extraction for Waveguide-Fed Metasurfaces
Laura Pulido-Mancera, Patrick T. Bowen, Nathan Kundtz +2
We consider the design and modeling of metasurfaces that couple energy from guided waves to propagating wavefronts. This is a first step towards a comprehensive, multiscale modelin…
Towards Explainable AI Planning as a Service
Michael Cashmore, Anna Collins, Benjamin Krarup +3
Explainable AI is an important area of research within which Explainable Planning is an emerging topic. In this paper, we argue that Explainable Planning can be designed as a servi…
On tilting modules over cluster-tilted algebras
David Smith
In this paper, we show that the tilting modules over a cluster-tilted algebra lift to tilting objects in the associated cluster category . As a first application…
The Advanced Compton Telescope Mission
Steven E. Boggs, James Kurfess, James Ryan +30
The Advanced Compton Telescope (ACT), the next major step in gamma-ray astronomy, will probe the fires where chemical elements are formed by enabling high-resolution spectroscopy o…
From 5G to 6G: A Survey on Security, Privacy, and Standardization Pathways
Mengmeng Yang, Youyang Qu, Thilina Ranbaduge +12
The vision for 6G aims to enhance network capabilities with faster data rates, near-zero latency, and higher capacity, supporting more connected devices and seamless experiences wi…
Decentralized Privacy Preservation for Critical Connections in Graphs
Conggai Li, Wei Ni, Ming Ding +5
Many real-world interconnections among entities can be characterized as graphs. Collecting local graph information with balanced privacy and data utility has garnered notable inter…
Neutrino Masses at v^{3/2}
Nima Arkani-Hamed, Lawrence Hall, Hitoshi Murayama +2
Theories in which neutrino masses are generated by a conventional see-saw mechanism generically yield masses which are O(v^2) in units where M_{Pl}=1, which is naively too small to…
Linear Dispersive Shocks
David Smith, Thomas Trogdon, Vishal Vasan
We present a linear dispersive partial differential equation which manifests a number of qualitative features of dispersive shocks, typically thought to occur only in nonlinear mod…
Private Graph Data Release: A Survey
Yang Li, Michael Purcell, Thierry Rakotoarivelo +3
The application of graph analytics to various domains has yielded tremendous societal and economical benefits in recent years. However, the increasingly widespread adoption of grap…
Seeing the Fruit for the Leaves: Towards Automated Apple Fruitlet Thinning
Ans Qureshi, Neville Loh, Young Min Kwon +10
Following a global trend, the lack of reliable access to skilled labour is causing critical issues for the effective management of apple orchards. One of the primary challenges is…
(Co)Homology theories for oriented algebras
Juan Carlos Bustamante, Julie Dionne, David Smith
We study three different (co)homology theories for a family of pullbacks of algebras that we call oriented. We obtain a Mayer Vietoris long exact sequence of Hochschild and cyclic…
Lunar polar craters -- icy, rough or just sloping?
Vincent R. Eke, Sarah A. Bartram, David A. Lane +2
Circular Polarisation Ratio (CPR) mosaics from Mini-SAR on Chandrayaan-1 and Mini-RF on LRO are used to study craters near to the lunar north pole. The look direction of the detect…
Leading Order Textures for Lepton Mass Matrices
Lawrence J. Hall, David Smith
In theories with three light neutrinos, certain simplicity assumptions allow the construction of a complete list of leading order lepton mass matrices. These matrices are consisten…
Yinsen: A low power density HTS tokamak fusion reactor for marine and off-grid applications
Justin Cohen, Jason Kaufmann, Maxim Umansky +4
Yinsen is a high-temperature-superconducting (HTS) tokamak reactor concept for off-grid applications such as maritime propulsion, remote power, and industrial energy. Rather than p…
Scattered Light Models of Protostellar Envelopes: Multiple Outflow Cavities and Misaligned Circumstellar Disks
Kenneth Wood, David Smith, Barbara Whitney +4
Ground based imaging, imaging polarimetry, and recent Hubble Space Telescope WFPC2 and NICMOS images of protostars have revealed very complex scattered light patterns that cannot b…
Speeding up Madgraph5 aMC@NLO through CPU vectorization and GPU offloading: towards a first alpha release
Andrea Valassi, Taylor Childers, Laurence Field +9
The matrix element (ME) calculation in any Monte Carlo physics event generator is an ideal fit for implementing data parallelism with lockstep processing on GPUs and vector CPUs. F…
Privacy at a Price: Exploring its Dual Impact on AI Fairness
Mengmeng Yang, Ming Ding, Youyang Qu +3
The worldwide adoption of machine learning (ML) and deep learning models, particularly in critical sectors, such as healthcare and finance, presents substantial challenges in maint…
Designing Environments Conducive to Interpretable Robot Behavior
Anagha Kulkarni, Sarath Sreedharan, Sarah Keren +3
Designing robots capable of generating interpretable behavior is a prerequisite for achieving effective human-robot collaboration. This means that the robots need to be capable of…
Memory Metamaterials
Tom Driscoll, Hyun-Tak Kim, Byung-Gyu Chae +7
The resonant elements that grant metamaterials their unique properties have the fundamental limitation of restricting their useable frequency bandwidth. The development of frequenc…
TokEye: Fast Signal Extraction for Fluctuating Time Series via Offline Self-Supervised Learning From Fusion Diagnostics to Bioacoustics
Nathaniel Chen, Kouroche Bouchiat, Peter Steiner +6
Next-generation fusion facilities like ITER face a "data deluge," generating petabytes of multi-diagnostic signals daily that challenge manual analysis. We present a "signals-first…
Simultaneous Parameter Estimation and Variable Selection via the LN-CASS Prior
William Thomson, Sara Jabbari, Angela Taylor +2
We introduce a Bayesian prior distribution, the Logit-Normal continuous analogue of the spike-and-slab (LN-CASS), which enables flexible parameter estimation and variable/model sel…
The art of coarse Stokes: Richardson extrapolation improves the accuracy and efficiency of the method of regularized stokeslets
Meurig Gallagher, David Smith
The method of regularised stokeslets is widely used in microscale biological fluid dynamics due to its ease of implementation, natural treatment of complex moving geometries, and r…
Little Higgses from an Antisymmetric Condensate
Ian Low, Witold Skiba, David Smith
We construct an SU(6)/Sp(6) non-linear sigma model in which the Higgses arise as pseudo-Goldstone bosons. There are two Higgs doublets whose masses have no one-loop quadratic sensi…
Multi-stage Antenna Selection for Adaptive Beamforming in MIMO Arrays
Hamed Nosrati, Elias Aboutanios, David Smith
Increasing the number of transmit and receive elements in multiple-input-multiple-output (MIMO) antenna arrays imposes a substantial increase in hardware and computational costs. W…
Solving the Hierarchy Problem with Exponentially Large Dimensions
Nima Arkani-Hamed, Lawrence Hall, David Smith +1
In theories with (sets of) two large extra dimensions and supersymmetry in the bulk, the presence of non-supersymmetric brane defects naturally induces a logarithmic potential for…
STROBE-X: X-ray Timing and Spectroscopy on Dynamical Timescales from Microseconds to Years
Paul S. Ray, Zaven Arzoumanian, David Ballantyne +155
We present the Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays (STROBE-X), a probe-class mission concept selected for study by NASA. It combines huge collectin…
FPGA-Accelerated Real-Time Beam Emission Spectroscopy Diagnostics at DIII-D Using the SLAC Neural Network Library for ML Inference
Abhilasha Dave, James Russell, Mudit Mishra +9
Achieving reliable real-time control of tokamak plasmas is essential for sustaining high-performance operation in next-generation fusion reactors. A major challenge is the accurate…
Representation theory of partial relation extensions
Ibrahim Assem, Juan Carlos Bustamante, Julie Dionne +2
Let C be a finite dimensional algebra of global dimension at most two. A partial relation extension is any trivial extension of C by a direct summand of its relation C-C-bimodule.…
Coexistence and Interference Mitigation for Wireless Body Area Networks: Improvements using On-Body Opportunistic Relaying
Jie Dong, David Smith
Coexistence, and hence interference mitigation, across multiple wireless body area networks (WBANs) is an important problem as WBANs become more pervasive. Here, two-hop relay-assi…
Evolution of the accretion flow in Nova Muscae 1991
Piotr Zycki, Chris Done, David Smith
We identify the X-Ray reflected component in the Ginga spectra of Nova Muscae 1991, a Black Hole transient system used as the prototype for the recent model of Esin, McClintock & N…
Robust Wireless Body Area Networks Coexistence: A Game Theoretic Approach to Time-Division MAC
Yizhou Yang, David Smith
The enabling of wireless body area networks (WBANs) coexistence by radio interference mitigation is very important due to a rapid growth in potential users, and a lack of a central…
Mutation of cluster-tilting objects and potentials
Aslak Bakke Buan, Osamu Iyama, Idun Reiten +1
We prove that mutation of cluster-tilting objects in triangulated 2-Calabi-Yau categories is closely connected with mutation of quivers with potentials. This gives a close connecti…