Garai, T, Mukhopadhyay, Samrat, Ghose, D
Approximate closed-form solutions of the non-linear relative equations of motion of an interceptor pursuing a target under the realistic true proportional navigation (RTPN) guidance law are derived...
Formation of ripple pattern on silicon surface by grazing incidence ion beam sputtering (2009)
Off-normal low energy ion beam sputtering of solid surfaces often leads to morphological instabilities resulting in the spontaneous formation of ripple structures in nanometer length scales. In the...
Collision avoidance between UAV clusters using swarm intelligence techniques (2009)
In this article, several basic swarming laws for Unmanned Aerial Vehicles (UAVs) are developed for both two-dimensional (2D) plane and three-dimensional (3D) space. Effects of these basic laws on the...
Growth and melting of silicon supported silver nanocluster films (2009)
Bhattacharyya, S R, Datta, D, Shyjumon, I, Smirnov, B M, Chini, T K, Ghose, D, ...
Thin films of silver nanoclusters deposited on Si substrates are studied using scanning electron microscopy along with energy dispersive x-ray spectrometry. The nanoclusters are produced by dc...
We present theoretical foundations for a variation of the multi-agent rendezvous problem involving design of local control strategies that enable agent swarms, with hard-limited sensing ranges, to...
Study of low energy Si$_5^-$ and Cs$^-$ implantation induced amorphization effects in Si(100) (2008)
Lenka, H. P., Joseph, B., Kuiri, P. K., Sahu, G., Mishra, P., Ghose, D., ...
The damage growth and surface modifications in Si(100), induced by 25 keV Si$_5^-$ cluster ions, as a function of fluence, $\phi$, has been studied using atomic force microscopy (AFM) and channeling...
Control of Agent Swarms using Generalized Centroidal Cyclic Pursuit Laws (2008)
One of the major tasks in swarm intelligence is to design decentralized but homogenoeus strategies to enable controlling the behaviour of swarms of agents. It has been shown in the literature that...
Generalization of nonlinear cyclic pursuit (2007)
In this paper, some generalizations of the problem of formation of a group of autonomous mobile agents under nonlinear cyclic pursuit is studied. Cyclic pursuit is a simple distributed control law,...
Control of Multiagent Systems Using Linear Cyclic Pursuit With Heterogenous Controller Gains (2007)
In this paper, behavior of a group of autonomous mobile agents under cyclic pursuit is studied. Cyclic pursuit is a simple distributed control law, in which the agent i pursues agent i+1 mod n. The...
Control of Multiagent Systems Using Linear Cyclic Pursuit With Heterogenous Controller Gains (2007)
In this paper, behavior of a group of autonomous mobile agents under cyclic pursuit is studied. Cyclic pursuit is a simple distributed control law, in which the agent i pursues agent i+1 mod n. The...
Kaipa, KN, Puttappa, A, Hegde, GM, Bidargaddi, SV, Ghose, D
This paper presents a novel glowworm metaphor based distributed algorithm that enables a minimalist mobile robot swarm to effectively split into subgroups, exhibit simultaneous taxis towards, and...
Kaipa, KN, Puttappa, A, Hegde, GM, Bidargaddi, SV, Ghose, D
This paper presents a novel glowworm metaphor based distributed algorithm that enables a minimalist mobile robot swarm to effectively split into subgroups, exhibit simultaneous taxis towards, and...
Computing BLAS Level-2 Operations on Workstation Clusters Using the Divisible Load Paradigm (2005)
The problem of executing large BLAS (basic linear algebra subprograms) Level-2 operations, such as matrix-vector products, in a network-based distributed computing environment composed of a...
Conservation implications of wild animal biomass extractions in Northeast India (2005)
We investigated the patterns of wild meat extraction and consumption by indigenous communities in Northeast India. Our respondents hunted at least 134 species of wild animals over the previous year...
Multiple UAV Search using Agent Based Negotiation Scheme (2005)
In this paper, we present an agent based negotiation scheme for multiple UAVs performing search operation on an unknown region. The UAVs are subjected to limited sensor range and can communicate with...
Generalization of the Cyclic Pursuit Problem (2005)
In this paper, some generalizations of the problem of formation of a group of autonomous mobile agents under cyclic pursuit is studied. Cyclic pursuit is a simple distributed control law, in which...
Evaluation of algorithms for efficient partitioning and scheduling of data bursts (2005)
Jutty, AK, Ghawghawe, SN, Ghose, D, Mani, V
We evaluate four scheduling algorithms for satellite communications that use the Time Division Multiple Access methodology. All the algorithms considered are based on the open-shop model. The...
Conservation implications of wild animal biomass extractions in Northeast India (2005)
Repercusiones en la conservación debidas a las extracciones de biomasa animal salvaje en el nordeste de la India.¿ Investigamos los patrones de extracción y consumo de carne de caza por parte de...
Computing BLAS Level-2 Operations on Workstation Clusters Using the Divisible Load Paradigm (2005)
The problem of executing large BLAS (basic linear algebra subprograms) Level-2 operations, such as matrix-vector products, in a network-based distributed computing environment composed of a...
Ascent Phase Trajectory Optimization for a Hypersonic Vehicle Using Nonlinear Programming (2005)
Prasanna, HM, Ghose, D, Bhat, MS, Bhattacharyya, C, Umakant, J
In this paper we present a nonlinear programming solution to one of the most challenging problems in trajectory optimization. Unlike most aerospace trajectory optimization problems the ascent phase...
Multiple UAV Search using Agent Based Negotiation Scheme (2005)
In this paper, we present an agent based negotiation scheme for multiple UAVs performing search operation on an unknown region. The UAVs are subjected to limited sensor range and can communicate with...
Generalization of the Cyclic Pursuit Problem (2005)
In this paper, some generalizations of the problem of formation of a group of autonomous mobile agents under cyclic pursuit is studied. Cyclic pursuit is a simple distributed control law, in which...
Evaluation of algorithms for efficient partitioning and scheduling of data bursts (2005)
Jutty, AK, Ghawghawe, SN, Ghose, D, Mani, V
We evaluate four scheduling algorithms for satellite communications that use the Time Division Multiple Access methodology. All the algorithms considered are based on the open-shop model. The...
Ascent Phase Trajectory Optimization for a Hypersonic Vehicle Using Nonlinear Programming (2005)
Prasanna, HM, Ghose, D, Bhat, MS, Bhattacharyya, C, Umakant, J
In this paper we present a nonlinear programming solution to one of the most challenging problems in trajectory optimization. Unlike most aerospace trajectory optimization problems the ascent phase...
Generalization of the Cyclic Pursuit Problem ABSTRACT (2005)
A. Sinha, D. Ghose, A. Sinha, D. Ghose
In this report, some generalizations of the problem of formation of a group of autonomous mobile agents under cyclic pursuit is studied. Cyclic pursuit is a simple distributed control law, in which...
Distributed Computation with Communication Delays: Asymptotic Performance Analysis (2004)
This paper analyzes the effect of communication delay on the optimal distribution of processing loads in distributed computing networks. The processing load is assumed to satisfy the property of...
Search Using Multiple UAVs with Flight Time Constraints (2004)
We consider a large scale system consisting of multiple unmanned aerial vehicles (UAVs) performing a search and surveillance task, based on the uncertainty map of an unknown region. The search...
Search Using Multiple UAVs with Flight Time Constraints (2004)
We consider a large scale system consisting of multiple unmanned aerial vehicles (UAVs) performing a search and surveillance task, based on the uncertainty map of an unknown region. The search...
Multiple Agent Search of an Unknown Environment Using Game Theoretical Models (2004)
This paper addresses the problem of obtaining optimal strategies for searching an unknown environment given in the form of an uncertainty map. Several strategies, in the form of variable length...
Distributed Computation with Communication Delays: Asymptotic Performance Analysis (2004)
This paper analyzes the effect of communication delay on the optimal distribution of processing loads in distributed computing networks. The processing load is assumed to satisfy the property of...
Multiple Agent Search of an Unknown Environment Using Game Theoretical Models (2004)
This paper addresses the problem of obtaining optimal strategies for searching an unknown environment given in the form of an uncertainty map. Several strategies, in the form of variable length...
Ion beam sputtering induced ripple formation in thin metal films (2003)
We have observed the formation of ripples in a number of thin metal films, e.g. Au, Pt, Ag, Cu and Co under Ar^{+} ion beam sputtering at grazing incidence. The structures are found to be quite...
Optimal Uncertainty Reduction Search using the k-Shortest Path Algorithm (2003)
We propose a search algorithm for uninhabited autonomous aerial vehicles (UAAVs) performing a search and surveillance task, based on the uncertainty map of an unknown region. The search algorithm is...
Optimal Uncertainty Reduction Search using the k-Shortest Path Algorithm (2003)
We propose a search algorithm for uninhabited autonomous aerial vehicles (UAAVs) performing a search and surveillance task, based on the uncertainty map of an unknown region. The search algorithm is...
Low energy Ar$^{+}$ ion beam induced kinetic roughening of thin Pt films on a Si substrate (2002)
A 30 nm Pt thin film evaporated onto a Si wafer was sputtered by 8 keV Ar$^{+}$ ions at various ion doses. The evolution of the modified sputtered films was monitored by atomic force microscopy...
The phenomenon of potential sputtering of ultra-thin Pt films due to impact of 20 keV highly charged $Ar^{q+}$ (q = 3 - 8) ions has been investigated. The results show enhanced erosion of the Pt film...
Radar-Assisted Collision Avoidance/Guidance Strategy for Planar Flight (2001)
We propose a radar-assisted collision avoidance/guidance strategy (RACAGS) for flight vehicles on low-altitude missions. The task of obstacle avoidance and guidance are integrated in a single...
Radar-Assisted Collision Avoidance/Guidance Strategy for Planar Flight (2001)
We propose a radar-assisted collision avoidance/guidance strategy (RACAGS) for flight vehicles on low-altitude missions. The task of obstacle avoidance and guidance are integrated in a single...
ELISA: An Estimated Load Information Scheduling Algorithm for Distributed Computing Systems (1999)
In this paper, we present a decentralized dynamic load scheduling/balancing algorithm called ELISA (Estimated Load Information Scheduling Algorithm) for general purpose distributed computing systems....
Probabilistic load scheduling with priorities in distributed computing systems (1998)
In this paper a distributed computing system/network in which two type of loads (or jobs) namely local loads and global loads arrive is considered. The local loads originate at the individual...
Probabilistic load scheduling with priorities in distributed computing systems (1998)
In this paper a distributed computing system/network in which two type of loads (or jobs) namely local loads and global loads arrive is considered. The local loads originate at the individual...
Analysis of the drop-out rule in probabilistic load sharing in distributed computing systems (1997)
It is known that the optimal solution to a probabilistic load-sharing problem in a distributed computing system may require that some of the slower processors in the system are not assigned any...
Availability maximization in machine-repair systems using an optimal load sharing approach (1997)
This paper considers a machine-repair system with more than one repair facility. In this scenario, a failed machine can be sent for repair to any one of the repair facilities. Hence, this gives rise...
Analysis of the drop-out rule in probabilistic load sharing in distributed computing systems (1997)
It is known that the optimal solution to a probabilistic load-sharing problem in a distributed computing system may require that some of the slower processors in the system are not assigned any...
Pure Proportional Navigation Against Time-Varying Target Maneuvers (1996)
Capturability of the pure proportional navigation (PPN) guidance law against a target executing bounded piecewise continuous time-varying manoeuvres is investigated. A qualitative analysis is carried...
Pure Proportional Navigation Against Time-Varying Target Maneuvers (1996)
Capturability of the pure proportional navigation (PPN) guidance law against a target executing bounded piecewise continuous time-varying manoeuvres is investigated. A qualitative analysis is carried...
Vbharadwaj, V, Ghose, D, Mani, V
In this paper, we present an improved load distribution strategy, for arbitrarily divisible processing loads, to minimize the processing time in a distributed linear network of communicating...
Multi-installment load distribution strategy in linear networks with communication delays (1995)
Bharadwaj, V, Ghose, D, Mani, V
In this paper the multi-installment load distribution strategy is applied to a linear network of processors without front-ends. The communication links in the network are assumed to have non-zero...
Bharadwaj, V, Ghose, D, Mani, V
The problem of obtaining optimal processing time in a distributed computing system consisting of (N+1) processors and N communication links, arranged in a single-level tree architecture, is...
On the Generalization of True Proportional Navigation (1994)
A simple framework to define generalized true proportional navigation (GTPN) guidance laws is presented. It is shown that this framework subsumes many of the generalizations presented in the earlier...
Distributed Computation in Linear Networks: Closed-form Solutions (1994)
A linear network of communicating processors is analyzed. The processors in the network may or may not be equipped with front-end processors. The processing load originates either at the boundary or...
Bharadwaj, V, Ghose, D, Mani, V
The problem of obtaining optimal processing time in a distributed computing system consisting of (N+1) processors and N communication links, arranged in a single-level tree architecture, is...
On the Generalization of True Proportional Navigation (1994)
A simple framework to define generalized true proportional navigation (GTPN) guidance laws is presented. It is shown that this framework subsumes many of the generalizations presented in the earlier...
Distributed Computation in Linear Networks: Closed-form Solutions (1994)
A linear network of communicating processors is analyzed. The processors in the network may or may not be equipped with front-end processors. The processing load originates either at the boundary or...
Multi-installment load distribution strategy in linear networks with communication delays (1994)
Bharadwaj, V, Ghose, D, Mani, V
In this paper the multi-installment load distribution strategy is applied to a linear network of processors without front-ends. The communication links in the network are assumed to have non-zero...
Capture Region For a Realistic TPN Guidance Law (1993)
This work obtains the capture region for a realistic true proportional navigation (RTPN) guidance law against a nonmaneuvering target where the assumption of constant closing velocity used in the...
Capture Region For a Realistic TPN Guidance Law (1993)
This work obtains the capture region for a realistic true proportional navigation (RTPN) guidance law against a nonmaneuvering target where the assumption of constant closing velocity used in the...
In this paper, a scalar game is derived from a zero-sum Multicriteria matrix game, and it is proved that the solution of the new game with strictly positive secularization is a necessary and...
Qualitative Analysis of Secured Outcome Regions for Two-Target Games (1991)
Qualitative (game of kind) outcomes of two-target games are analyzed in this paper, under both the zero-sum and nonzero-sum preference ordering of outcomes by the players. The outcome regions of each...
Qualitative Analysis of Secured Outcome Regions for Two-Target Games (1991)
Qualitative (game of kind) outcomes of two-target games are analyzed in this paper, under both the zero-sum and nonzero-sum preference ordering of outcomes by the players. The outcome regions of each...
In this paper, a scalar game is derived from a zero-sum Multicriteria matrix game, and it is proved that the solution of the new game with strictly positive secularization is a necessary and...
A Spread Acceleration Guidance Scheme for Command Guided Surface-To-Air Missiles (1989)
A new guidance law for command guided surface-to-air missiles is presented. It attempts to reduce the integral control effort while at the same time takes into account the maneuvers of the target. A...
A Spread Acceleration Guidance Scheme for Command Guided Surface-To-Air Missiles (1989)
A new guidance law for command guided surface-to-air missiles is presented. It attempts to reduce the integral control effort while at the same time takes into account the maneuvers of the target. A...
Formulation and analysis of combat problems as zero-sum bicriterion differential games (1988)
In this paper, we present a formulation and analysis of a combat game between two players as a zero-sum bicriterion differential game. Each player''s twin objectives of terminating the game on his...
Formulation and analysis of combat problems as zero-sum bicriterion differential games (1988)
In this paper, we present a formulation and analysis of a combat game between two players as a zero-sum bicriterion differential game. Each player''s twin objectives of terminating the game on his...