Top PDF USE OF A SYSTEM DESIGN ULTRAACUSTIC WELDING

USE  OF A  SYSTEM  DESIGN  ULTRAACUSTIC WELDING

USE OF A SYSTEM DESIGN ULTRAACUSTIC WELDING

Ultraacustic system is the most important part of an equipment or ultrasonic activation as ultrasonic energy transfer and increase in focus on the processing and activation. Ultraacustic system consists of an active element - transducer - one that converts electrical oscillations in ultrasonic and passive elements - Ultrasonic energy concentrator - who lead concentrate and focus ultrasonic energy on the focus of processing. .. Ultraacustic system is calculated and designs so that to work in the resonance regime. [11],[12],[13].
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J. Braz. Chem. Soc.  vol.21 número12

J. Braz. Chem. Soc. vol.21 número12

The use of a basic simplex design method allowed the easy and fast optimization of an automated online preconcentration system for manganese determination in river water and vegetal leaves. The automation of the procedure diminished the errors associated with the operation of manual valves normally used in these kinds of systems and increased the FAAS performance, presenting analytical characteristics that allow manganese determination at low concentration levels. The developed system is simple, rapid, easy to use, selective, and with adequate sensitivity. The manganese contents found in the analyzed matrices are at an acceptable level, suggesting that these foods are adequate for human consumption. The developed method is presented as a good alternative for the routine determination of manganese in vegetal leaves and river waters samples.
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Design And Implementation Of Smart Living Room Wireless Control For Safety Purpose

Design And Implementation Of Smart Living Room Wireless Control For Safety Purpose

Microcontroller based living room control system using Bluetooth technology will provide effective and modernized living standard.Bluetooth is a wireless technology standard for exchanging data over short distances (using short wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). Living room control system from mobile is one of the most popular forms of wireless control technology. Researchers around the world are continuously improving our life by creating innovative applications of computing for our daily activities. Today, mobile phones come out of work place and are effectively used to communicate and to make our life easier and better than ever. In this living room control system, they are used to control the living room appliances via Bluetooth technology. Being inspired by the widespread use of wireless communication technology, we are proposing a concept of Smart Living Room System that will make our home convenient and smart. In this research,the door of the living room opens and closes by using keypad lock system. It is controlled by arduino controller and the status of the door is displayed on serial LCD. The control of light bulbs, fan speed, dim light and window angle based on wireless Bluetooth technology and microcontrollerare implemented. Users of the living room can interact with the devices by wireless mobile interface via Bluetooth. This system also requires a specialized android apk to control the living room appliances from mobile. Implementation of Smart Living Room system has several advantages. Door security system was built with a keypad that was controlled by arduino. To open the door, user must enter the correct password and if the wrong password was entered, the door will be still locked. It can save the home from entering thieves and strangers.Old and disable persons can manage the living room without using too much effort. As fan speed can be adjusted, users can maintain the room temperature as the desire. User can also vary the lighting of the room by using dim light. There isalso a window system that can be opened and closed between 0 and 180 degree as user desire.Furthermore, four light bulbs are also presented and user can switch on and offthem. All the appliances in the living room can be controlled without using too much energy. It can be controlled easily by mobile from any place of the room. While user can’t go to open or close the
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Architecture design of a virtualized embedded system

Architecture design of a virtualized embedded system

Paravirtualization: Paravirtualization is based on a hypervisor layer, which manages the interface completely with the material, and on which you can install different operating systems. Paravirtualizationoffers to an operating system a generic special system, which therefore requires special interfaces integrated guest systems in the form of drivers. Paravirtualization is a virtualization technique of lower level than the insulation. It shares with it the need to use a modified OS. More specifically, paravirtualization is no longer only the host OS to be changed but also the OS required to run on virtual environments. The heart of paravirtualization hypervisor is running close to the hardware, and provides an interface that allows multiple hosts to concurrently access to resources. Each virtual machine must be modified to use this interface to access the hardware. Unlike the isolation of several different families OS can run on a single physical server. It is possible to run Linux, NetWare, Solaris (and others) simultaneously on the same machine. Each OS will have access to their own storage devices, its own memory, her or its own network interfaces or its own processors; each virtualized hardware resource is shared with other environments. The need of small changes to the guest operating system does not support closed systems, especially Microsoft Windows.
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Design and implementation of a reliable unmanned aerial system design

Design and implementation of a reliable unmanned aerial system design

As we can see in Figure 51, the flight mode was changed from stabilize to loiter, as identified in the white rectangles since it detected an object and the message was sent. After that implementation we decided to check how long it will take for the obstacle detection module to instruct the flight controller to change to loiter mode. Since we use only three sensors and having an object appear at the start of a detection cycle it will take 150ms (small delay of 50ms that was implemented between each sensor in order to get better accuracy) to go throw the three sensors to see if there is an object. After that, if an object is detected, a message is sent to the APM in order to change the flight mode. Once in the APM it will take approximately 1000ms for it to change its flight mode as we can see in Figure 52 and in Table 10 which show the flight mode changing from stabilize to loiter.
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Mat. Res.  vol.12 número3

Mat. Res. vol.12 número3

models for the measured responses such as weld-metal composition, mechanical properties, microstructure and element transfer charac- teristics of the flux. However, they did not use the models to perform optimization on the responses. To be able to perform optimization on the responses, the XVERTD methodology should be coupled with mathematical programming optimization techniques. Usually, the aim of optimization in welding flux design is to minimize, maximize or hit the target of a response(s). With such models the formulation of welding flux can now be based on quantitative footing and advance the state-of-the-art of welding flux technology. With the integration of MP optimization techniques with XVERTD, the limitations of experimental optimization can be addressed, particularly, the random character of welding flux can be eliminated and optimality guaranteed. Also, it will be possible to ascertain the feasibility or otherwise of achieving the required operational characteristics and weld-metal performance level with the flux ingredients early before much effort is expended on experiments. Reduction in costs of labour, materials and energy associated with extensive experimental weld production and testing coupled with reduction in lead-time for the new flux are also benefits of such MP optimization models.
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Design of mechatronic system for handling bedridden people

Design of mechatronic system for handling bedridden people

mechanical patient lifts as decreased musculoskeletal symptoms and injuries among health care workers [34]. Such solutions are beneficial for all since the patient enjoys an aid to mobility, the caregiver strain and effort is reduced and the entity that manages the care (be it private or public) as healthier and more productive workers and satisfied “clients”. The technological advances of recent years have provided us with new tools to improve on what already has already been done as well as created new solutions to better care for all of us. The term Assistive Technology can refer to several concepts, products and services that independently or combined provide assistance with a task that without those means would require additional effort or would not be possible [35], [36]. Ambient assisted living (AAL) is a gerontechnology that emerges from Assistive Technology with the goal of caring for an individual with some sort of limitation or impairment in his own environment. AAL aims to enhance quality of life through the development of an ecosystem of products and services. It does so by providing an interaction platform that connects the impaired person to several devices and services that combined provide care. Being always mindful that said interaction must take in account the limitations of the individuals for which the care is intended. Several AAL programs have sprouted in recent years and has given birth to a whole movement of research opportunities, large-scale EU projects, (public-private partnerships) with the intent of bringing to market tangible solutions as soon as possible. Some examples of these are the “AALIANCE - The European Ambient Assisted Living Innovation Alliance”, the “Active and Assisted Living programme” and the “aal4all” initiatives. To better understand the scope of AAL it is best to provide a description of an example scenario. One of these examples may comprise a product and/or service that can monitor biomedical data of the individual and alert you to any spot situation or even notify the authorities in case of emergencies. AAL not only makes the monitoring of individual is possible but also can also monitor their surroundings alerting him or caregivers of any event out of the ordinary. Through the use of data acquisition devices, the intervenient can be made aware of events such as devices left turned on, fires or a case of home invasion. The system can also responded automatically to these events such as turning of the device, applying fire countermeasures in the case of a fire or calling the police in the case of home invasion. In addition, when applying healthcare and health prevention technology to AAL, solution such telepresence and telemedicine can improve the quality of healthcare that we provide to the elderly [37].
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DESIGN AND DEVELOPMENT OF AUTO DEPTH CONTROL OF REMOTELY OPERATED VEHICLE USING THRUSTER SYSTEM

DESIGN AND DEVELOPMENT OF AUTO DEPTH CONTROL OF REMOTELY OPERATED VEHICLE USING THRUSTER SYSTEM

The pressure sensor measures the pressure, typically of gases or liquids, and usually acts as a transducer which generates a signal as a function of the pressure imposed. There are several types of analogue pressure sensor: piezoresistive strain gauge, capacitive, electromagnetic, piezoelectric, optical and potentiometric. For underwater use, the piezoresistive strain gauge and capacitive pressure sensor are both widely used for the auto depth control system due to their design for measuring the differential pressure. However, based on the advantages and disadvantages considered, this paper utilizes a piezoresistive strain gauge. Even though it has a high initial offset compared to the capacitive pressure sensor, it has high sensitivity and good linearity at constant temperature [14]. There are two types of piezoresistive strain gauge pressure sensor: MPX4250GP and MPX5700GP. Comparisons in terms of sensitivity between the sensors are made and Figure 4(a) shows the circuit diagram of the pressure sensors, and Figure 4(b) the actual pressure sensor.
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Investigation of Applications of SA in the Design of Dynamic Cellular Manufacturing Systems

Investigation of Applications of SA in the Design of Dynamic Cellular Manufacturing Systems

Abstract- Manufacturing industries are under intense pressure from the increasingly competitive global marketplace. Shorter product lifecycle, time to market and diverse customer needs have challenged manufacturers to improve the efficiency and productivity of their production activities. Manufacturing systems should be able to adjust or respond quickly to adopt necessary changes in product design and product demand without major investment. Traditional manufacturing systems are not capable of satisfying such requirements. Although a cellular manufacturing system (CMS) provides great benefits, the design of CMS is complex for real life problems. The design of such a kind of manufacturing system under dynamic production environment, with variety and demand varying between each planning horizon, requires pervasive use of a Meta- heuristics such as Genetic Algorithm (GA), Simulated Annealing algorithm (SA), and Tabu Search (TS). The dynamic cell formation (CF) problem (involving the formation of a mathematical model depicting the variable product mix and demand across the planning horizons) is known to be one of the NP-hard combinational problems. Although some optimization algorithms can find the optimal solution for small- and medium-sized problems, they have a disadvantage in that the memory and computational time requirements are extremely high, and increase exponentially, as the problem size increases. In such situations, meta-heuristics are used for exploring and exploiting the search space to obtain good solutions. In contrast to other stochastic searches, SAs in particular have the following unique features: it does not get trapped in local minimum. Allow uphill moves controlled by parameter called temperature. Final result not dependent on initial state.These features often makes them a preferable choice over traditional heuristics. The objective of this paper is to review how the SA has been applied so far for the Design of Cellular Manufacturing System application. In this paper we present a comprehensive review of the works that applied SA for CMS deign and suggest some directions for future research.
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On the use of haptic tablets for UGV teleoperation in unstructured environments: system design and evaluation

On the use of haptic tablets for UGV teleoperation in unstructured environments: system design and evaluation

JOSÉ LUÍS SILVA received the Eng. degree in informatics and systems engineering from the Uni- versity of Minho, Braga, Portugal, in 2007, and the Ph.D. degree in computer science from the Por- tuguese MAP-i Consortium (University of Minho, University of Aveiro and University of Porto), in 2012. From 2012 to 2013, he performed a Post- doctoral with the University of Toulouse (France) in collaboration with Airbus. From 2013 to 2016, he was an Invited Assistant Professor with the Exact Sciences and Engineering Department, Madeira University, Portu- gal. Since 2016, he has been an Assistant Professor with the Department of Information Science and Technology, Instituto Universitário de Lisboa (ISCTE-IUL), Lisbon, Portugal. His work has been published at venues such as IJHCS, ENTCS, ACM EICS, INTERACT. His main research inter- ests include software engineering, human–computer interaction, ubiquitous computing, and virtual environments. He is a member of both LARSyS Laboratory and ISTAR-IUL Research Center. Dr. Silva is an observer of the IFIP TC 13 - Working Group 13.2. His awards and honors include a FCT Doctoral Degree Grant (Portuguese Government), ISCTE-IUL Scientific Award, Best Iberian Ph.D. thesis in Systems and Information Technologies from AISTI and Ph.D. Award from Fraunhofer Portugal Challenge.
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Design and Simulation of a Banking Network System

Design and Simulation of a Banking Network System

ABSTRACT: The general aim of this project is to simulate a banking system which is secure and easy to use. Previously the system was manual, not secure, also working slowly. This proposed system overcomes the lacking of the existing manual system. All branches of the Bank situated at District level provide the Banking services to customers and had to send report to the central branch manually, which sometimes creates problem to get, up-to-date information rapidly. But now through this system whenever any transaction will be taking place it will store in the central database and authorized person can get necessary information or report when they get into the system from any branches through Wide Area Network (WAN).To implement our project we have used OSI model. This system is using Packet Tracer 5.3 for network simulation, Wamp Server, PHP Mysql, for Banking Web application Security. After implementation of all functions, the system is tested in different stages and it was successful for its purpose.
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The Use of Design for Six Sigma (DFSS) Methodology in Product Design

The Use of Design for Six Sigma (DFSS) Methodology in Product Design

In Design stage, the ventilation holes were added to the Back Cover of the WIWI 1.8 product. The question now is “What is the suitable size for the ventilation holes?” In Six Sigma there is a method in determining the optimize value of certain parameters given the factors contributing to the wanted output. The tool or method is called Design of Experiments (DOE). DOE is method for planning, conducting & analysing a test where the input factors involved are changed in order to observe the changes in the output of the system. One of the most known experimental designs is the Factorial Experiments.
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J. Braz. Soc. Mech. Sci. & Eng.  vol.28 número1

J. Braz. Soc. Mech. Sci. & Eng. vol.28 número1

To measure the actual Tool Center Point (TCP) trajectory of ro- botic manipulators, a robust and highly precise Neural Network based computer vision system has been developed. It is based on real-time pattern recognition of image sequences obtained by the 'eye-in-hand' CCD-Camera (Bauchspiess, Wagner & Benker, 1997). Because the pattern is simple and well defined, a very high subpixel precision can be obtained, which gives precise and fast measure- ments despite the use of a low resolution camera. The first results were obtained using laser printed trajectories. Currently, this tech- nique is beeing implemented for welding seam tracking of an ABB IRB2000 robot. Projected structured light techniques are being employed.
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Using the line of balance for production system design

Using the line of balance for production system design

One of the main problems regarding the use of larger teams to carry out the tasks was the division of money among the team members. According to the project manager, the more productive workers could complain about the equal division of money among the team members. The production supervisor suggested that this kind of problem rarely happens when the work is carried out in pairs of workers instead of larger teams. The company managers also pointed out that the division of work in small batches among team members was a problem; even though this would allow workers to carry out work packages simultaneously. According to the managers, there could be space conflicts and loss of productivity due to differences in the productivity of team members. These differences could also result in disaggregation of teams because some workers could work faster than others and ask for the next part of a work package in a different area of the building.
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J. Braz. Soc. Mech. Sci. & Eng.  vol.30 número4

J. Braz. Soc. Mech. Sci. & Eng. vol.30 número4

The traditional approach of welding flux formulation is expensive because of the long lead-time, consumption of considerable amount of costly materials, high energy consumption and labour requirement. The long lead-time is due to the lengthy trial and error experiments while the high energy requirement is due to the need for extensive experimental weld production and testing. With the traditional welding flux development approach, information on the main and interaction effects of the flux ingredients on the weld-metal properties and operational characteristics of the welding flux are not readily identified and quantified. Many investigators tried to understand the role of each flux ingredients on the weld-metal properties and operational characteristics of the process by varying only the individual flux ingredient in a given flux system (Farias et al., 2002; Du Plessis et al. 2007). Kanjilal et al., (2004) observed that this approach by its very nature failed to take into account the simultaneous variation of the flux ingredients as well as their interaction effects. The significant interactions effect of flux ingredients has been reported previously (Lau et al., 1986 and Kanjilal et al., 2004). Assessment of flux ingredient interaction has been recognised as increasingly important in welding flux design where it may be necessary to determine the combined synergetic and antagonistic effects of many flux ingredients (Kanjilal et al., 2004, 2006, 2007)
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Design of Object-based Information System Prototype

Design of Object-based Information System Prototype

The term of micro-content was first mentioned in a 1998 article of usability adviser Nielsen (1998). He referred to micro-content as small groups of words that can be skimmed by a person to get a clear idea of the content of a Web page. He included article headlines, page titles, subject lines and e-mail headings. Such phrases also may be taken out of content and displayed on a directory, search result page, bookmark list, etc. Another meaning of micro-content was defined by Anil Dash in 2002: “Today, micro-content is being used as a more general term indicating content that conveys one primary idea or concept, is accessible through a single definitive URL or perma-link, and is appropriately written and formatted for presentation in email clients, web browsers, or on handheld devices as needed. A day’s weather forecast, the arrival and departure times for an airplane flight, an abstract from a long publication, or a single instant message can all be examples of micro-content”. In summary, we can understand micro-content as a short content that delivers important idea or concept from the definition of Jakob Nielsen and Anil Dash.
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Soldag. insp.  vol.18 número1

Soldag. insp. vol.18 número1

Some prospective studies are devoted to evaluation of quality characteristics by energetic parameters of the welding process. This approach is believed to be the most applicable in case of mass production because these parameters are easy to measure without additional equipment and human resources. The analysis results are used mainly for three purposes: to predict the quality characteristics of the welded joint (possible defects, mechanical properties and geometry), to deine the disturbances occuring during the process and for continuous process monitoring. Such analysis if often performed by means of intellectual systems which allow to remove the human from the procedure of control and thus to reduce the subjectivity of its results and the process cost. At the present time such monitoring systems are used for arc welding and resistance spot welding [3, 4].
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Design And Construction Of 300W Audio Power Amplifier For Classroom

Design And Construction Of 300W Audio Power Amplifier For Classroom

Abstract: This paper describes the design and construction of 300W audio power amplifier for classroom. In the construction of this amplifier, microphone preamplifier, tone preamplifier, equalizer, line amplifier, output power amplifier and sound level indicator are included. The output power amplifier is designed as O.C.L system and constructed by using Class B among many types of amplifier classes. There are two types in O.C.L system _ quasi system and complementary system. Between them, the complementary system is used in the construction of 300W audio power amplifier. The Multisim software is utilized for the construction of audio power amplifier.
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Chosen aspects of thermo-mechanical phenomena in resin bonded sands by use of Hot Distortion tests

Chosen aspects of thermo-mechanical phenomena in resin bonded sands by use of Hot Distortion tests

Two thcrmic sources (clcctric and gascous) to sarnplc hcating was testcd and analyscd. I t was intmduced the cxtended measurement and recording of choscn parameters. i.e, va[r]

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Organizational design redefined by design thinking. Case studies in the hotel industry

Organizational design redefined by design thinking. Case studies in the hotel industry

These were some of the questions in the origin of holacracy: “How can we live and work together in a more full, more embracing, more powerful way? We weren’t looking for another incremental improvement or new techniques within existing models and structures; we sought an entirely new tier of organization and shared meaning, one which rewrote the most basic rules of human engagement. Although we had no idea what the answer to our question actually was, we already had the most important ingredient in finding out – we had the question” (Robertson, 2007). What distinguishes us from holacracy is that using classical design or design thinking, we start from a semi-emptiness (almost a blank sheet) so that with creativity and based on classical design techniques we may create an organizational design that is unique, thus creating a wider range of types of organizational designs. So our question was, how can we create organizational designs adapted to the needs of the users, the ethics and the context of the organization using design thinking and organizational theories? However it is important to say that sociocracy and holacracy don't give us solutions for organizations that don’t want a shared management spirit or a more hybrid organizational design, while design thinking does. Holacracy and sociocracy only gave us arguments and additional practical cases and processes for organizations that were open for shared management and governance, or to develop the technique of organizing with autonomous circles in the organization. In holacracy practitioners start from a quite democratic base and it is very efficient with regard to providing answers so that the decision making processes with a democratic base may be not only faster, but also be based upon consensus.
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