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Rahmat Ullah

Publications and source records attributed to Rahmat Ullah.

4 recordsLinked to original sources

Agentic Fog: A Policy-driven Framework for Distributed Intelligence in Fog Computing

Fog and edge computing require adaptive control schemes that can handle partial observability, severe latency requirements, and dynamically changing workloads. Recent research on Agentic AI (AAI) increasingly integrates reasoning systems powered by Large Language Models; however, these tools are not applicable to infrastructure-level systems due to their high computational cost, stochastic nature, and poor formal analyzability. In this paper, a generic model, Agentic Fog (AF), is presented, in which fog nodes are represented as policy-driven autonomous agents that communicate via p2p interactions based on shared memory and localized coordination. The suggested architecture decomposes a system's goals into abstract policy guidance and formalizes decentralized fog coordination as an exact potential game. The framework is guaranteed to converge and remain stable under asynchronous updates, bounded-rational best-response dynamics, and node failures. Simulations demonstrate that the AF system achieves lower average latency and adapts more efficiently to varying demand than greedy heuristics and integer linear programming under dynamic conditions. The sensitivity analysis also demonstrates the capability to perform optimally under different memory and coordination conditions.

cs.DC

Amplification and Excitation of Surface Plasmon Polaritons via Four-Wave Mixing Process

We suggest a scheme for the excitation and amplification of surface plasmon polaritons (SPPs) along the interface between metal and semiconductor quantum well (SQW), employing a four-wave mixing (FWM) process. The SQW consists of four-level asymmetric double quantum wells that exhibit quantum interference effects, which leads to the coupler-free excitation of SPPs. In our proposed system, the inherent losses of SPPs are compensated by introducing gain through the FWM process. This results in a significant enhancement in the propagation length and large penetration depth of SPPs. We further analyze the effect of gain on the long-range and short-range SPPs and observe that the propagation distance and lifetime of both types of SPPs are enhanced.

quant-ph

Entrepreneurial Higher Education Education, Knowledge and Wealth Creation

This book presents detailed discussion on the role of higher education in terms of serving basic knowledge creation, teaching, and doing applied research for commercialization. The book presents an historical account on how this challenge was addressed earlier in education history, the cases of successful academic commercialization, the marriage between basic and applied science and how universities develop economies of the regions and countries. This book also discusses cultural and social challenges in research commercialization and pathways to break the status quo.

econ.GN

Precision spatial measurement of the hot rubidium atom in the three-dimension

The interaction of hot atoms with laser fields experiences a Doppler shift which can severely affect the precise spatial measurement of an atom. We suggest an experimentally realizable scheme to address this issue in three-dimension position measurement of a single atom in vapors of rubidium atoms. Three-level lambda type atom-field configuration is considered where a moving atom interacts with three orthogonal standing-wave laser fields and spatial information of the atom in 3D space is obtained via upper-level population using a weak probe laser field. The atom moves with a velocity along the probe laser field and due to the Doppler broadening the precision in the spatial information deteriorates significantly. It is reported that via a microwave field the precision in the position measurement of the single atom can be obtained in the hot rubidium atom overcoming the limitation posed by the Doppler shift.

physics.atom-ph