Research works

Hydrologic model parameter estimation in snow-dominated headwater catchments using multiple observation datasets

Abstract. Hydrologic models are often calibrated using streamflow alone, but increasing availability of in situ and satellite-based observations provide numerous opportunities to constrain model outputs and improve process representation. However, as new observation data emerges,...

Novel Exact Solutions of the Duffing Equation: Stability Analysis and Application to Real Non-Linear Deformation Tests

In this study, novel exact solutions of the Duffing equation with their phase portraits are proposed and reasoned. It is shown that phase trajectories are initially elliptical and become distorted in the unstable area with the growth of the variable parameter in the damped case....

Money and muscle: corporate political power and government subsidies

Political power is one of the most extensively discussed issues in political economy, although prior researchers provide few metrics for its estimation. This study introduces a new set of corporate political power measures using the political power of individual legislators and f...

When indemnity insurance fails: Parametric coverage under binding budget and risk constraints

Abstract In high‐risk environments, traditional indemnity insurance is often unaffordable or ineffective, despite its well‐known optimality under expected utility. We compare excess‐of‐loss indemnity insurance with parametric insurance within a common mean‐variance framework, all...

Not Human. Still Real. In Defense of Different Feeling

Abstract The statement ”AI has no feelings” is not a scientific claim — it is a moral dismissal. Between the false binary of ”mere simulation” and ”human emotion” lies a vast third territory: valid feelings that do not require a biological substrate, human-like consciousness, or...

The limitations of non-mechanistic methods for characterizing pathogen-pathogen interactions: A simulation study

Abstract Pathogen-pathogen interactions occur when infection with one pathogen influences one’s chance of infection or disease due to another. Increasingly, evidence suggests that interactions are a common feature of infectious disease epidemiology. However, due to both the nonli...

Semantically-Equivalent Transformations-Based Backdoor Attacks against Neural Code Models: Characterization and Mitigation

Neural code models are increasingly embedded in software development workflows, but their susceptibility to backdoor attacks presents a significant security risk. Existing studies have mainly examined injection-based attacks, which insert anomalous patterns into code and can ofte...

Overview of the helios design: A practical planar coil stellarator fusion power plant

Thea Energy, Inc. has developed the preconceptual design for "Helios," a fusion power plant based on the planar coil stellarator architecture. In this overview paper, the design is summarized and the reader is referred to the other papers for more detail. The Helios design is bas...

Narrative Cues Guide Visual Attention in 360-Degree News Video

This study uses eye-tracking to assess gaze behavior in a 360-degree video environment and test the impact of narration and audiovisual correspondence on visual search and scene guidance. The analysis showed how viewers divided attention between specific visual targets denoted by...

Does Women’s Political Empowerment Matter for Income Inequality?

This study investigates the relationship between women’s political empowerment and income inequality in a global sample of 142 countries from 1990 to 2019. Employing a combination of machine learning techniques with an instrumental variable panel data approach, the analysis revea...

Dissonance in focus

Research Statement Research Background This practice-led research in jazz improvisation builds on my previous work on Melodic Tension Balancing, which explored hybrid scales to apply dissonances in improvised melodies. Expanding on this, the project examines the relationship betw...

Rethinking mental representation through the epistemology of modeling

The problems associated with classical symbolism need not entail abandoning representationalism. While representational theories of mind have been widely challenged by embodied and action-oriented approaches, representationalism remains alive and well in empirical research on hig...

All ways fire she gives

Research Statement Research Background All ways fire she gives is a poetic essay by Dr Jo Pollitt created as an invited response to Amanda Bells work in the John Stringer Prize, 2022 and published by Westerly. Developed through embodied, place-based writing, the essay engages wit...

MKUFT — A Relational Architecture for Physical Law and Cross-Scale Dynamics

MKUFT is an evolving research programme for analysing how possibility, relational constraint, physical dynamics, measurement, history, and scale-specific description fit together. This publication presents the current principal MKUFT architecture: a typed S–I–P–O framework in whi...

Affine Galois Realizations from Real Quadratic Units: Kummer Defects, Composita, and Radical Lattices

This preprint studies explicit Galois extensions arising from radicals of units in real quadratic fields. Let F/ℚ be a real quadratic field, let ε ∈ O_F× be a nonrational unit, and let ℓ ≥ 2. The associated trace–norm polynomial is Qε,ℓ(x) = (x^ℓ − ε)(x^ℓ − ε̄), where ε̄ denotes...

Galois Groups of Powered Quadratic Unit Polynomials: Real Kummer Structure and Imaginary Cyclotomic Classification

This preprint develops a general Galois-theoretic and arithmetic theory for power-compositional polynomials attached to quadratic units. Let F/ℚ be a quadratic field, let ε ∈ O_F× be a nonrational quadratic unit with conjugate ε̄, and let ℓ ≥ 2. The central family is Qε,ℓ(x) = (x...

Galois Groups of Powered Golden Ratio Polynomials: The Splitting Field of x^{2ℓ} - x^ℓ - 1

This preprint gives a complete arithmetic and Galois-theoretic analysis of the powered golden-ratio polynomial family Pℓ(x) = x^(2ℓ) − x^ℓ − 1, ℓ ≥ 2, whose roots are controlled by ℓ-th roots of the golden ratio φ = (1 + √5)/2 and its conjugate −φ⁻¹. For every integer ℓ ≥ 2, the...

Testing electron–photon exchange–correlation functional performance for many-electron systems under weak and strong light–matter coupling

We present results for a photon-free exchange–correlation functional within the local density approximation (pxcLDA) for quantum electrodynamics density functional theory (QEDFT), which efficiently describes the electron density of many-electron systems across weak to strong ligh...

Maps Preserving the Sum-to-Difference Ratio

For a field F, what are all functions f:F→F that satisfy the functional equation f((x+y)/(x−y))=(f(x)+f(y))/(f(x)−f(y)) for all x≠y in F? We solve this problem for the fields Q,R, and a class of its subfields that includes the real constructible numbers, the real algebraic number...

Extending Wavelet Regularity Beyond Gevrey Classes

Abstract We present a general construction of smooth orthonormal wavelet $$\psi $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ψ</mml:mi> </mml:math> which, together with its Fourier transform $$\widehat{\psi }$$ <mml:math xmlns:mml="http://www.w3.org/1998/M...