This paper is the latest in a short series on the origins, processes and effects of performativity in the public sector. Performativity, it is argued, is a new mode of state regulation which makes it possible to govern in an 'advanced... more
This paper investigates the capital structure choices that firms make in their initial year of operation, using restricted-access data from the Kauffman Firm Survey. Contrary to many accounts of startup activity, the firms in our data... more
A strategy for adaptive control and energetic optimization of aerobic fermentors was implemented, with both air flow and agitation speed as manipulated variables. This strategy is separable in its components: control, optimization,... more
CNC machining nowadays makes more use of "Mechatronics" increasingly. Combining numerical control with mechanic, electric, and data processing systems can lead to new methods of production. In recent years, the development of CNC has made... more
STEP-NC (formalized as ISO 14649 and ISO 10303 AP238) is a new interface (or language) standard for the CAD -CAM -CNC chain, currently under establishment by ISO TC184 SC1 and SC4. Upon completion, it will replace ISO 6983, so called M &... more
An octree-based (numerical control) NC simulation (Oct-OAC) system developed for end milling has two major applications: (1) NC verification and (2) optimization of the cutting parameters, viz., spindle speed, N (s −1 ), and feed rate, f... more
In the domain of manufacturing, computer numerically controllers (CNC) technology is a major contributor to the production capacity of the enterprises. The advances in CNC technology coupled with enhancements in computing systems have... more
JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and... more
This paper describes an integrating hardware and software ensemble for the development of microcontroller-based computer numerical control system. The discuss is focused on design and implementation of the communication between the PC and... more
Among the most important characteristics of furniture on the market is the value aggregated provided by its design. In the particular case of wood furniture an important characteristic is the finish being the decorative reliefs a well... more
Conventional grinding of silicon substrates results in poor surface quality unless they are machined in ductile mode on expensive ultra-precision machine tools. However, precision grinding can be used to generate massive ductile surfaces... more
This review compiles personal and indoor microenvironment particulate matter (PM) monitoring needs from recently set research objectives, most importantly the NRC published ''Research Priorities for Airborne Particulate Matter (1998)''.... more
This work focuses on developing an application based on the information contained in the numerical control (NC) kernel for surface roughness monitoring of the part in process. A human-machine interface (HMI) was developed in order to... more
Conventional programming of Numerically Controlled machine tools is normally based on ISO 6983. In conventional CNC machining, a part is designed using a CAD system, and that is read into a CAM system. The standard assumes information... more
In this study, we have investigated the effects of different insert radii of cutting tools, different depths of cut and, different feed rates on the surface quality of the workpieces depending on various processing parameters. Properly,... more
A novel concept to cognitive automation of robotic assembly processes is introduced. An experimental assembly cell with two robots was designed to verify and validate the concept. The cell's numerical control-termed a cognitive control... more
Stepping motors are widely used in robotics and in the numerical control of machine tools where they have to perform high-precision positioning operations. However, the variations of the mechanical configuration of the drive, which are... more
A novel approach to cognitive automation of assembly processes is introduced. An experimental assembly cell with two robots has been designed to proof the concept. The cell’s numerical control – termed a cognitive control unit (CCU) – is... more
T his paper presents a new programming approach based on a proposed hardware and control architecture for the reconfigurable manufacturing tool machine. A new CAM is described based on virtual machining algorithm that optimizes feedrate... more
El presente artículo propone una metodología para el diseño y la fabricación de implantes craneales a partir de imágenes DICOM y tecnologías CAD/CAM/CNC. Esta metodología parte de las Tomografías Axiales Computarizadas (TAC) de la cabeza... more
Three-dimensional models are being increasingly used as prototypes in various areas of manufacturing, research and education. They are especially useful in the evaluation of elements typical of mechanical design, but are also important in... more
CNC feature-based programming with STEP-NC standard extends the collaborative model of manufacturing data exchange all along the numerical data chain. This paper considers the mutations related to this approach from the manufacturing... more
Design of a stable controller and observer for web tension regulation in an accumulator, in web processing lines, is considered in this paper. A simplified average dynamic model that includes accumulator carriage dynamics, average web... more
Numerical control milling (NCM) at high speed is the most used machining process in the manufacture of molds because it offers high productivity and workpiece surface quality. The aim of this work is to establish a methodology to evaluate... more
This paper documents part of a research program which has been under way at the CIM Centre at Swinburne University of Technology since 1989. The purpose of the research program was to develop an open-architecture machine tool control... more
Over the years, machine tool evolution has allowed faster equipment, using new configurations, to manufacture parts that were almost impossible to machine in the past. Despite this tremendous evolution in machine and control technologies,... more
This paper deals with a system called TPMS (Task Planning for Manufacturing Systems). The main aim of this system is to automatically generate programs or sets of commands for robots, AGV's, numerical control machines, etc, without... more
Statistic based predictive modelling is often used for structures which are especially difficult to control and model. The modelling of hydraulic systems is challenging as they lose their stability due to the nonlinear parameters such as... more
The problem of tandem production lines composed of multiple unreliable workstations producing a single part type with holding (inventory and storage space) and shortage costs is considered. Given the numerous control mechanisms introduced... more
The Sequenced Convex Subtraction (SCS) algorithm is a hardware based multi-pass image-space algorithm for general purpose Constructive Solid Geometry (CSG) Rendering. Convex objects combined by volu- metric intersection, difference and... more
This paper presents the problem definition of the benchmark structural control problem for the seismically excited highway bridge. The benchmark problem is based on the newly constructed 91/5 highway overcrossing in southern California.... more
In the domain of manufacturing, computer numerically controllers (CNC) technology is a major contributor to the production capacity of the enterprises. The advances in CNC technology coupled with enhancements in computing systems have... more
The theory and algorithm of the homogeneous transformation matrix (HTM) method are applied in establishing the kinematic error model of five-axis machining tool with two-axis turntable. Based on this model, a new method for the kinematic... more
We investigate in this paper a numerical method to control the temperature of an induction heating process through electric current parameters such as frequency and current voltage imposed to the terminals of the inductor. We seek a... more
To maintain the maximum achievable efficiency for the photovoltaic (PV) systems, it is crucial to achieve the maximum power point tracking (MPPT) operation for realistic illumination conditions. This paper presents the application of the... more
Stepping motors are widely used in robotics and in the numerical control of machine tools where they have to perform high-precision positioning operations. However, the variations of the mechanical configuration of the drive, which are... more
To accomplish timing recoverylsynthesis in highspeed communication systems, a 24-b numerically controlled oscillator (NCO) IC using a circuit design technique called true single-phase clock (TSPC) pipelined CMOS has been fabricated in a... more
This paper presents the problem definition of the benchmark structural control problem for the seismically excited highway bridge. The benchmark problem is based on the newly constructed 91/5 highway over-crossing in Southern California.... more
This paper presents the problem definition of the benchmark structural control problem for the seismically excited highway bridge. The benchmark problem is based on the newly constructed 91/5 highway over-crossing in southern California.... more
We investigate in this paper a numerical method to control the temperature of an induction heating process through electric current parameters such as frequency and current voltage imposed to the terminals of the inductor. We seek a... more
The overall goal of this research effort has been the development of a software system which automates tasks related to monitoring and controlling electrical power distribution in spacecraft electrical power systems. The resulting... more
Tension control of an aluminum strip in a strip processing line is the focus of this paper. A continuous strip processing line is truly a large-scale complex interconnected dynamic system with numerous control zones to transport the strip... more
Today's High-Speed Machining (HSM) machine tool combines productivity and part quality. The difficulty inherent in HSM operations lies in understanding the impact of machine tool behaviour on machining time and part quality. Analysis of... more
Today's High-Speed Machining (HSM) machine tool combines productivity and part quality. The difficulty inherent in HSM operations lies in understanding the impact of machine tool behaviour on machining time and part quality. Analysis of... more