Henry Hexmoor | Southern Illinois University at Carbondale (original) (raw)

Papers by Henry Hexmoor

ArXiv, 2019

The paper provides an understanding of social capital in organizations that are open membership m... more The paper provides an understanding of social capital in organizations that are open membership multi-agent systems with an emphasis in our formulation on the dynamic network of social interaction that, in part, elucidate evolving structures and impromptu topologies of networks. This paper, therefore, models an open source project as an organizational network. It provides definitions of social capital for this organizational network and formulation of the mechanism to optimize the social capital for achieving its goal that is optimized productivity. A case study of an open source Apache-Hadoop project is considered and empirically evaluated. An analysis of how social capital can be created within this type of organizations and driven to a measurement for its value is provided. Finally, a verification on whether the social capital of the organizational network is proportional towards optimizing their productivity is considered.

2012 Fourth International Conference on Intelligent Networking and Collaborative Systems, 2012

in this fast growing world, rapid alterations in technologies result in having a huge influence o... more in this fast growing world, rapid alterations in technologies result in having a huge influence on humans' standard of living, increase global opportunities and globalize shareholders' activities. Executives all over the world are expected to utilize the right technology in order to gain the high level of success for their organizations. These executives require sustainable knowledge, techniques and tools that will allow them to continue to advance and remain ahead of the competition in the business environment. In this paper, we consider the techniques that will give a clear analysis of how social capital can be created within virtual teams or organizations and what value is created with the help of social capital. It will help organizations to examine the type of value they already created with social capital and its reflection in the future.

Cooperative adaptive cruise control (CACC) is a nascent technology that purports to improve many ... more Cooperative adaptive cruise control (CACC) is a nascent technology that purports to improve many facets of long haul traffic and road usage. Drivers may deploy CACC when traffic is steady and predicable. At other times, traditional driving is preferred. This paper reports on a simulation of CACC and explores the best times to deploy it. Platooning is among chief applications of CACC. Keywords—CACC, platoon, leader selection

The Florida AI Research Society, 2004

A methodology for surveillance of multiple targets through a distributed mobile sensor network is... more A methodology for surveillance of multiple targets through a distributed mobile sensor network is proposed in this paper. We examine coordination among sensors that monitor a rectangular surveillance zone that is crisscrossed by targets. After a target is detected, monitoring sensors either remain stationary or begin following their targets. The decision to remain stationary or to track a target is based on a complex priority ascription to the target and the coordination mechanism between the sensors. The priorities are computed with a fuzzy inference scheme. Coordination between sensors considers the geometry of the future target path and the number of expected observations a sensor is likely to make on the target. Simulation results validate the efficacy of the proposed methodology.

Proceedings of the AAAI Conference on Artificial Intelligence

In a dynamic network organization, member agents usually interact to coordinate their actions and... more In a dynamic network organization, member agents usually interact to coordinate their actions and to cooperate towards a common goal with which they have no previous experience. These relations allow them to produce a cohesive group to build and maintain their network. This paper will outline the effect of social capital on a network structure inside a network organization.

2016 International Conference on Collaboration Technologies and Systems (CTS)

Cyber-physical systems (CPS) are algorithmically controlled mechanisms involving networked device... more Cyber-physical systems (CPS) are algorithmically controlled mechanisms involving networked devices [1]. Whereas physical components of CPS (e.g., robots sand devices) are tangible, embodied, and occupy physical space, cyber components are largely disembodied, intangible, and location-independent. As such, internet of things (IoT) are a subset of CPS. In sharp contrast to the passive view for entities of things as objects, agent inhabitants of IoT are active and may take action proactively. In this perspective, things are enlivened with agent overlays that take advantage of smart sensors and provide intended decision making capacities for things. Numerous suggestions posit that things in physical proximity form social ties creating collaboration networks. Minimally, things provide profiles that include goods and services relevant to other things. We are focusing on interactions among people and things that lead to creation of trust, delegation, role arbitration, and thus collaboration. Nodes may perceive a level of social capital as experience prior and expected future beneficial interactions. Much needs to be developed to exploit the spectrum of sociality. We have used crowd evacuation as an illustrating case study and an exemplar for other scenarios.

Learning takes place when the system makes changes to its in-ternal structure so as to improve so... more Learning takes place when the system makes changes to its in-ternal structure so as to improve some metric on its long-term future performance, as measured by a xed standard [3]. Let us take \learning " to mean, roughly, the improvement of a system's behavior by making it more appropriate for the environ-ment in which it is embedded [2]. 1

A framework and analysis for a distributed sensor network based surveillance system is presented ... more A framework and analysis for a distributed sensor network based surveillance system is presented here. In a previous effort [1] we have presented methodologies for coordination and decision-making amongst sensors for tracking targets while in [2] we presented the results of endowing the sensor network with autonomy. Sensors monitor targets that crisscross a rectangular surveillance zone. When a sensor pursuits a target it leaves areas unguarded through which other targets can get past undetected. In this paper we presents a methodology that computes the tracking time for a sensor that guarantee detection of a required fraction of the targets expected to crisscross its home area to an arbitrary probabilistic threshold. The home area of the sensor is the area guarded by it when it is stationed at its home position, its default position when it is not in pursuit of a target. Simulations are presented that corroborate with the probabilistic model developed and hence vindicate its correc...

Accurately assessing team performance is required by team directors in order to improve the likel... more Accurately assessing team performance is required by team directors in order to improve the likelihood of achieving team goals. Unfortunately, there are no generally accepted and broadly useful methods for assessing team performance. This paper takes preliminary steps towards developing general criteria for such an assessment by suggesting how team performance of agents can be measured. These measurements can be used to assess the need to improve team effectiveness. The measurements might be obtained either by evaluations internal to a team (subjective) or by external means (objective).

Entropy, 2020

Due to the complexity of an open multi-agent system, agents’ interactions are instantiated sponta... more Due to the complexity of an open multi-agent system, agents’ interactions are instantiated spontaneously, resulting in beneficent collaborations with one another for mutual actions that are beyond one’s current capabilities. Repeated patterns of interactions shape a feature of their organizational structure when those agents self-organize themselves for a long-term objective. This paper, therefore, aims to provide an understanding of social capital in organizations that are open membership multi-agent systems with an emphasis in our formulation on the dynamic network of social interactions that, in part, elucidate evolving structures and impromptu topologies of networks. We model an open source project as an organizational network and provide definitions and formulations to correlate the proposed mechanism of social capital with the achievement of an organizational charter, for example, optimized productivity. To empirically evaluate our model, we conducted a case study of an open s...

This paper examines the major issues and modes of interactions between a small number of agents, ... more This paper examines the major issues and modes of interactions between a small number of agents, outlines the extension of these concepts to inter-groups, and points to promising directions of research that are useful in modeling dynamic organizations of agents.

In this paper we discuss autonomy and agents with abilities for changing their level of autonomy.... more In this paper we discuss autonomy and agents with abilities for changing their level of autonomy. We suggest enriching agents with introspective abilities so their choice of behavior can correspond with their current level of autonomy.

We are exploring teaming in complex and dynamic environments that requires reasoning about roles ... more We are exploring teaming in complex and dynamic environments that requires reasoning about roles and social influences. Towards that end we describe our implemented testbed and experiments that empirically show effects of such reasoning in a team setting.

When situation assessment is performed individually by cooperative, friendly agents working towar... more When situation assessment is performed individually by cooperative, friendly agents working toward a commonly held goal, optimal strategies for sharing information are needed. The best strategies are often domain dependant with respect to constraints imposed by the domain itself. Appropriate strategies for information sharing can be selected by looking at the overall performance of a strategy based on a set of predefined metrics measuring qualities such as information consistency across the agents, information completeness among the agents, and timeliness of information availability to each agent. We have developed a prototype system, SAM-ISS, within a Theater Missile Defense scenario that we have used to investigate the utility of a set of metrics for determining the quality of three different information sharing strategies (ISS).

This paper presents a simple model of trust and autonomy and explores the role of power as social... more This paper presents a simple model of trust and autonomy and explores the role of power as social influence on trust and autonomy. We present a quantitative measure we term power homogeneity that quantifies profiles of power assignment in a group. Experimental results illustrate changes in trust and autonomy with groups at different power homogeneity. We also show that our model of autonomy predicts commitment levels.

2013 Federated Conference on Computer Science and Information Systems, 2013

This paper presents an approach for controlling collision avoidance among a group of moving multi... more This paper presents an approach for controlling collision avoidance among a group of moving multi-agents such that they are not able to communicate with each other and hence, cannot share information. The basics and key features of our collision control algorithm are discussed to include practical examinations. Our approach is based on multi-agent systems and help moving agents to pursue their goals using collision free routes. In terms of validating our solution, we plan to apply into a configuration set of agents located in our experimental space. We also explain our solution algorithm that we have developed, along with the examination that we subjected it to, as well as sketching some of the most important challenges that remain to be addresses in our future researches.

IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA '04. 2004, 2004

A strategy for collision avoidance between several moving robots that are not in possession of ea... more A strategy for collision avoidance between several moving robots that are not in possession of each other's plans is presented here. A robot's awareness of other robots is limited to the knowledge of their current states represented by their present and impending velocities and their motion direction. A robot is aware of the presence of other robots when they fall within its field of vision. Collision avoidance is attempted at three levels namely at individual, cooperative and propagation levels through velocity control. At individual level it suffices that one of the robots involved in a forthcoming collision modifies its velocity. The cooperative level is characterized by the requirement that all the robots involved in collision modify their velocities in a synchronized fashion. In the third level robots not involved in a collision are entailed to participate by altering their velocities in a manner that resolves collision conflicts between the robots involved. The third level is termed as the propagation level since the collision conflict is propagated to robots not a part of the conflict and their assistance sought in avoiding conflicts. The strategy is implemented in a distributed fashion across all robots in the system. Simulation results are presented to authenticate the efficacy of the proposed method.

IEMC '03 Proceedings. Managing Technologically Driven Organizations: The Human Side of Innovation and Change (IEEE Cat. No.03CH37502)

We have implemented a test-bed with agents who collaborate and communicate, potentially with dece... more We have implemented a test-bed with agents who collaborate and communicate, potentially with deceptive information. Agents range from benevolent to selfish. They also have differing trustworthiness levels. Deception handling can vary from agents with mood swings about being deceived, to agents who react minimally to being deceived. We show the effects of different trustworthiness values in different scenarios on group performance. Our agents are designed in BDI paradigm and implement a possible-world semantics.

2007 International Conference on Integration of Knowledge Intensive Multi-Agent Systems, 2007