Model based control strategies for a class of nonlinear mechanical sub-systems

This paper presents a comparison between various control strategies for a class of mechanical actuators common in heavy-duty industry. Typical actuator components are hydraulic or pneumatic elements with static non-linearities, which are commonly referred to as Hammerstein systems. Such static non-linearities may vary in time as a function of the load and hence classical inverse-model based control strategies may deliver sub-optimal performance. This paper investigates the ability of advanced model based control strategies to satisfy a tolerance interval for position error values, overshoot and settling time specifications. Due to the presence of static non-linearity requiring changing direction of movement, control effort is also evaluated in terms of zero crossing frequency (up-down or left-right movement). Simulation and experimental data from a lab setup suggest that sliding mode control is able to improve global performance parameters

Data Processing and Information Management in the City of Omaha, Nebraska: Analysis and Recommendations

The city of Omaha has an extensive and complex data processing system. It is so large, in fact, that no single person inside or out of city government is fully knowledgeable about it. The system as it exists today cannot be described as an information management system as it is neither coordinated nor comprehensive. It consists instead of numerous components that have come together over time without the benefit of an overall plan or clear policy direction. The system is rarely viewed from a citywide perspective or from the perspective of providing information required by management for operational and planning purposes. Rather, it is viewed from the perspective of individual departments or divisions as a component of city operations that collects something called data and produces something called reports

Application of automatic vehicle location in law enforcement: An introductory planning guide

A set of planning guidelines for the application of automatic vehicle location (AVL) to law enforcement is presented. Some essential characteristics and applications of AVL are outlined; systems in the operational or planning phases are discussed. Requirements analysis, system concept design, implementation planning, and performance and cost modeling are described and demonstrated with numerous examples. A detailed description of a typical law enforcement AVL system, and a list of vendor sources are given in appendixes

Rhode Island Report on the Judiciary 1985

This is the eleventh annual report produced by the Administrative Office of State Courts, and it shows that the courts have continued to make improvements in several areas. Accomplishments for 1985 include the continued effort to meet speedy trial guidelines, major improvements to court buildings, and the work of study committees to resolve particular problems affecting the judicial system

A flexible mathematical model for the planning and designing of a sporting fixture by considering the assignment of referees

Indexación: Scopus.This paper deals with the problems faced with the designing and planning of a sporting fixture considering correct referee assignments. A non-linear binary program model is proposed to solve the problems, which aims to minimize the sums of the differences that exist between the requirements of each match and the quality of the referee assigned achieving the design of the most adequate referee for each match. The efficiency of the proposed model is proved using some real data obtained from various fixtures for sports such as soccer, volleyball, and basketball. The mathematical model is solved by using CPLEX 12.7.0., which allows the automatic linearization of the problems. The results obtained demonstrate the efficiency of the proposed methodology for tackling problems, as well as its extension to other sporting disciplines, which require a similar type of planning. Similarly, given the robust nature of the proposed model, it is possible to implement other objective functions in accordance with the requirements of each league. © 2019 by the authors; licensee Growing Science, Canada.http://growingscience.com/beta/ijiec/2960-a-flexible-mathematical-model-for-the-planning-and-designing-of-a-sporting-fixture-by-considering-the-assignment-of-referees.htm

Rhode Island Report on the Judiciary 1979

This report describes progress and programs in all the state courts. Its articles briefly mention some of the efforts and achievements of our judges and court employees to better serve the people of Rhode Island and the interests of Justice

Personas in Uniform: Police Officers as Users of Information Technology

This paper discusses information technology in the contemporary policing context and presents a research approach that aims to capture and describe a multifaceted account of police work. There is a need to further analyze the constitution of the uniformed user and the use environment in this domain. Data from extensive ethnographic fieldwork are analyzed. Personas and scenarios are used in this paper to illustrate the properties and conditions of police work. Evidence from the study suggests that personas and scenarios can make the daily work visible and support the emergent design of information systems in the dialogue between designers and users. The paper concludes that personas and their scenarios provide a richer description of the specifics of a context and a design space. A scenario is used to show characteristic properties and the emergence of work practice in relation to the design of information systems

Multi-community command and control systems in law enforcement: An introductory planning guide

A set of planning guidelines for multi-community command and control systems in law enforcement is presented. Essential characteristics and applications of these systems are outlined. Requirements analysis, system concept design, implementation planning, and performance and cost modeling are described and demonstrated with numerous examples. Program management techniques and joint powers agreements for multicommunity programs are discussed in detail. A description of a typical multi-community computer-aided dispatch system is appended

Internet of Things-aided Smart Grid: Technologies, Architectures, Applications, Prototypes, and Future Research Directions

Traditional power grids are being transformed into Smart Grids (SGs) to address the issues in existing power system due to uni-directional information flow, energy wastage, growing energy demand, reliability and security. SGs offer bi-directional energy flow between service providers and consumers, involving power generation, transmission, distribution and utilization systems. SGs employ various devices for the monitoring, analysis and control of the grid, deployed at power plants, distribution centers and in consumers' premises in a very large number. Hence, an SG requires connectivity, automation and the tracking of such devices. This is achieved with the help of Internet of Things (IoT). IoT helps SG systems to support various network functions throughout the generation, transmission, distribution and consumption of energy by incorporating IoT devices (such as sensors, actuators and smart meters), as well as by providing the connectivity, automation and tracking for such devices. In this paper, we provide a comprehensive survey on IoT-aided SG systems, which includes the existing architectures, applications and prototypes of IoT-aided SG systems. This survey also highlights the open issues, challenges and future research directions for IoT-aided SG systems

Aerospace management techniques: Commercial and governmental applications

A guidebook for managers and administrators is presented as a source of useful information on new management methods in business, industry, and government. The major topics discussed include: actual and potential applications of aerospace management techniques to commercial and governmental organizations; aerospace management techniques and their use within the aerospace sector; and the aerospace sector's application of innovative management techniques