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A new sink should be in simple shapes for reasonable manufacturing process. On the other hand, the heat sink tends to be complicated shape for high cooling performance. Recently, 3D printer is able to process complicated shapes. However, manufacturing cost by 3D printing method is expensive. Thus it is important to verify and improve fluid flow and thermal conductivity at the design stage of the heat...
The uniform phase planes of the radiated beam in the E- and H-planes are located at different distances from the lens horn aperture due to its asymmetric TE11 mode aperture distribution. A new method by attaching a simple dielectric slab on the lens surface is proposed for matching the distances. The both uniform phase planes are formed 55 mm away from an antenna aperture with the dielectric slab...
Slots are cut into the arms of an Archimedean spiral antenna in order to generate a stop band. The center frequency of the stop band is determined by the slot resonance, which occurs when the slot length is close to one-quarter wavelength. It is found that the gain drastically drops at the center frequency of the stop band. It is also found that the radiation characteristics outside the stop band...
An autonomous robot system for power distribution line maintenance work is developed. At the maintenance work level, one of the most repeated tasks is tightening a nut. The nut tightening task is carried over using a remote joystick under damping control, and the procedure for automatically tightening nut is considered and a feasibility study is conducted using an experimental robot system. If the...
In this research, we propose a novel segmentation method for image of cultured cell at a confluent state, obtained by phase-contrast microscope, based on the orientation. First, we assign to each pixel in the image the direction of an eigenvector corresponding to a smaller eigenvalue of the 2 by 2 Hessian matrix with respect to brightness. Next, we define the orientation at a certain pixel as the...
This paper presents a methodology for automatic construction of image operators using a linear genetic programming approach, for binary, gray level and color image processing, where the processing solution for a particular application is expressed in terms of the basic morphological operators, dilation and erosion, in conjunction with convolution and logical operators. Genetic Programming (GP), based...
Excellence in manufacturing systems has been recognized as one of the main factors behind the success of industrial companies. New technologies for manufacturing processes play a significant role in this process. Achieving the potential of technological innovations in production, however, requires a wide range of management, as well as engineering issues related to the system. Material handling is...
Excellence in manufacturing systems has been recognized as one of the main factors behind the success of industrial companies or production companies. New technology for manufacturing processes plays a significant role in this process. Achieving the potential of technological innovations in production, however, requires a wide range of management, as well as engineering issues related to the system...
Mathematical morphology supplies powerful tools for low level image analysis, with applications in many areas. In this paper, the development of a novel reconfigurable hardware using a genetic algorithm and a pipeline architecture is proposed for the task of shape recognition in binary images. For the recognition process, a large sized convex structuring element representing the object shape to be...
Scheduling of machines and AGVs in Flexible Manufacturing Systems involves modeling and searching methodology in a wide solution space. In this work the search for scheduling occurs by genetic algorithm and simple AGV dispatching rules. Modeling occurs in Timed Petri nets in time of fitness evaluation, considering the input buffers of machines, AGVs, and flags also control the use of these buffers,...
This paper aims to use an extension of Petri nets, Fuzzy Coloured Petri nets to model a manufacturing system and to solve conflicts that occur when processes are competing for the same resources. System resources, part routing and buffers are modeled in Coloured Petri Nets and a fuzzy rule-based system is modeled using Fuzzy Petri Nets. Conflicts may occur at the load station, input and output buffers...
This paper proposes an Ant Colony optimization approach for production scheduling problem in a flexible manufacturing system. The problem is treated on two perspectives, based on the modeling and the search method. The problem modeling is characterized by a high-level problem description, using the production routes as a way to represent the states of the solution space. About the collaboration concept...
Even if a cellular manufacturing system is robot assisted with assembly support, the main operator is human. A system designer cannot therefore ignore the mental strain experienced by the operator as a result of improper assembly support. In this paper, authors analyzed operators' mental strain induced by physical and informational support in an advanced cellular manufacturing system with human-robot...
To improve productivity of assembly in cell production, human robot collaboration is introduced. In the collaboration, robot manipulator supports human operators by handing over an assembly part in the assembly process. However, when the human operator works coexisitently with the moving robot in close distance, it might induce high stress to the operator. This paper studies on strain measurement...
Sickle cell anemia (SCA) is a genetic disease which is characterized by painful episodes of vascular occlusions. In the present study, we investigated a potential contribution of the autonomic nervous system (ANS) in initiating such episodes. We observed prominent decreases in microvascular perfusion in response to spontaneous sighs, which may increase the likelihood of red blood cell polymerization...
DLNA devices, by definition, do not support remote connectivity. Even if attached to a LAN that is connected to the Internet, they can generally not be used to consume streamed or downloadable media. By providing a gateway in a mobile phone that exposes a 'remote Digital Media Server' on the LAN, content from different online sources can be made available on locally connected media renderers. Adding...
In this paper, we present a hand rehabilitation system for patients suffering from paralysis or contracture. It consist of two components: a hand rehabilitation machine, which moves human finger joints using motors, and a data glove, which enables controlling the movement of the finger joints attached to the rehabilitation machine. The machine is based on the arm structure type of hand rehabilitation...
Human-centered characteristic of cell production systems may meet the diversified production and quantity requirements. However, there are two problems: firstly, assembly efficiency depends on operator's individual skill; secondly, it may need high concentration of an operator to cause mental strain to them. Information support provides a solution to improve operator's operation performance and to...
Since cell production system meets the frequent change of products, it has excluded automatic assembly systems. However, its benefits mainly depend on the operators' ability. As wage level of the operators stays high and availability of expertise turns difficult in Japan, a new assembly system has been developed since 2006 so as to combine both the competitiveness of human workers and automatic machinery...
The challenge of this work is to study the design and development of human-robot collaboration (HRC) in cellular manufacturing. Based on the concept of human collaborative design, four main design factors are being identified and developed in an active HRC prototype production cell for cable harness assembly. Human collaborative design aims to optimize the system design for the advantage of collaboration...
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