Articles

02/01/2007-- 02/01/2007

Multiparticle production in the Glasma at NLO and plasma instabilities

We discuss the relation between multi-particle production in the Glasma at next-to-leading order and the physics of plasma instabilities.
Raju Venugopalan
08/10/1998-- 08/10/1998

Introduction to light cone field theory and high energy scattering

In this set of four lectures, we provide an elementary introduction to light cone field theory and some of its applications in high energy scattering.
Raju Venugopalan
04/05/2008-- 04/05/2008

Time Travel and the Reality of Spontaneity

Contrary to the informed consensus, time travel implies spontaneity (as distinct from chance) so that time travel can only be of the second kind.
C. K. Raju
02/13/2012-- 02/13/2012

High Voltage Generation for Physics Lab

A power efficient way to generate low power high voltage is given. The article describes various aspects of functioning and derives quantitative relations between different parameters and high voltage generated. Use of voltage multiplier (Cockcroft-Walton multiplier) network can provide further boost in the high voltage(~1000V).
Raju Baddi
12/27/2016-- 12/27/2016

The initial state and hard probes: a brief review

We provide a brief review of some of the recent developments in our understanding of the initial state in ultra-relativistic heavy-ion collisions.
Raju Venugopalan
09/09/2023-- 09/09/2023

Characterizations of strictly convex spaces and proximal uniform normal structure

We provide a few characterizations of a strictly convex Banach space. Using this we improve the main theorem of [Digar, Abhik; Kosuru, G. Sankara Raju; Cyclic uniform Lipschitzian mappings and proximal uniform normal structure. Ann. Funct. Anal. 13 (2022)].
Abhik Digar G. Sankara Raju Kosuru
04/23/2023-- 04/23/2023

Interplay of viscosity and wettability controls fluid displacement in porous media

Direct numerical simulations are used to elucidate the interplay of wettability and fluid viscosities on immiscible fluid displacements in a heterogeneous porous medium.We classify the flow regimes based using qualitative and quantitative analysis into viscous fingering (low $M$), compact displacement (high $M$), and an intermediate transition regime ($M \approx 1$). We use stability analysis to obtain theoretical phase boundaries between these regimes, which agree well with our analyses. At the macroscopic (sample) scale, we find that wettability strongly controls the threshold $M$ (at which the regimes change). At the pore scale, wettability alters the dominant pore-filling mechanism. At very small $M$ (viscous fingering regime), smaller pore spaces are preferentially invaded during imbibition, with flow of films of invading fluid along the pore walls. In contrast, during drainage, bursts result in filling of pores irrespective of their size. As $M$ increases, the effect of wettability decreases as cooperative filling becomes the dominant mechanism regardless of wettability. This suggest that for imbibition at a given contact angle, decreasing $M$ is associated with change in effective wetting from neutral-wet (cooperative filling) to strong-wet (film flow).
Saideep Pavuluri Ran Holtzman Luqman Kazeem Malyah Mohammed Thomas Daniel Seers Harris Sajjad Rabbani
02/15/2025-- 02/15/2025

Hybrid Brain-Machine Interface: Integrating EEG and EMG for Reduced Physical Demand

We present a hybrid brain-machine interface (BMI) that integrates steady-state visually evoked potential (SSVEP)-based EEG and facial EMG to improve multimodal control and mitigate fatigue in assistive applications. Traditional BMIs relying solely on EEG or EMG suffer from inherent limitations; EEG-based control requires sustained visual focus, leading to cognitive fatigue, while EMG-based control induces muscular fatigue over time. Our system dynamically alternates between EEG and EMG inputs, using EEG to detect SSVEP signals at 9.75 Hz and 14.25 Hz and EMG from cheek and neck muscles to optimize control based on task demands. In a virtual turtle navigation task, the hybrid system achieved task completion times comparable to an EMG-only approach, while 90% of users reported reduced or equal physical demand. These findings demonstrate that multimodal BMI systems can enhance usability, reduce strain, and improve long-term adherence in assistive technologies.
Daniel Wang Katie Hong Zachary Sayyah Malcolm Krolick Emma Steinberg Rohan Venkatdas Sidharth Pavuluri Yipeng Wang Zihan Huang
08/25/2009-- 11/29/2006

P is not equal to NP

This submission has been withdrawn at the request of the author.
Raju Renjit. G
08/25/2009-- 02/21/2007

Ulam's Conjecture is True for Connected Graphs

This submission has been withdrawn at the request of the author.
Raju Renjit. G


with thanks to arxiv.org/