Molecular switch architecture determines response properties of signaling pathways

KR Ghusinga, RD Jones, AM Jones… - Proceedings of the …, 2021 - National Acad Sciences
Many intracellular signaling pathways are composed of molecular switches, proteins that
transition between two states—on and off. Typically, signaling is initiated when an external …

[HTML][HTML] Characterizing the role of autaptic feedback in enhancing precision of neuronal firing times

Z Vahdat, O Gambrell, A Singh - bioRxiv, 2023 - ncbi.nlm.nih.gov
In a chemical synapse, information flow occurs via the release of neurotransmitters from a
presynaptic neuron that triggers an Action potential (AP) in the postsynaptic neuron. At its …

Moment analysis of linear time-varying dynamical systems with renewal transitions

M Soltani, A Singh - SIAM Journal on Control and Optimization, 2019 - SIAM
Stochastic dynamics of several systems can be modeled via piecewise-deterministic time
evolution of the state, interspersed by random discrete events. Within this general class of …

Feedback and feedforward regulation of interneuronal communication

O Gambrell, Z Vahdat, A Singh - bioRxiv, 2024 - biorxiv.org
We formulate a mechanistic model capturing the dynamics of neurotransmitter release in a
chemical synapse. The proposed modeling framework captures key aspects such as the …

Using fluctuation statistics to infer random forces impinging on a nanosensor

M Soltani, A Singh - 2022 IEEE Conference on Control …, 2022 - ieeexplore.ieee.org
Cantilever-based nanosensors are increasingly being used as gas and chemical sensors.
We mechanistically model an important source of stochasticity arising in these systems-the …

Analysis of dynamical systems with discrete noise injection events

Z Vahdat, A Singh - 2023 - osf.io
The canonical approach to modeling stochasticity considers a dynamical system driven by
Gaussian white noise. Here, we propose an alternative hybrid formulation, in which …

Controller design and stability analysis for singularly perturbed hybrid systems with multi-rate sampling

Y He, D Zhu, Y Liu, X Zhang - 2024 36th Chinese Control and …, 2024 - ieeexplore.ieee.org
This paper investigates the stabilization problem of singularly perturbed hybrid systems with
multi-rate sampling. Firstly, we establish a hybrid model to describe a class of singularly …

Autonomous system safety: Towards targeted and scalable approaches for validation and behaviour analysis

PB Du - 2023 - ideals.illinois.edu
Autonomous systems are rapidly making their way into the physical domain, where they
have to interact with human users in unstructured and safety-critical scenarios. The …

Noise analysis in biochemical complex formation from stochastically produced components

Z Xu, KR Ghusinga, A Singh - 2020 American Control …, 2020 - ieeexplore.ieee.org
Macromolecular complexes have important roles in cellular functions. These complexes are
formed via multi-merization of either a single component (homomers) or multiple …

Estimating stationary characteristic functions of stochastic systems via semidefinite programming

KR Ghusinga, A Lamperski… - 2018 European Control …, 2018 - ieeexplore.ieee.org
This paper proposes a methodology to estimate characteristic functions of stochastic
differential equations that are defined over polynomials. For such systems, the time evolution …