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2009 ASEE Annual Conference and Exposition

作者： Bannatyne, Mark Baldwin, Dan Marshall, Kevin Computer Graphics Technology Purdue School of Engineering IUPUI United States Department of Design and Communication Technology Computer Graphics Technology IUPUI United States

Students of today are immersed in the culture of mobile technology and the laptop has become a center of connectivity to their world around them, and its use a fundamental means of social and academic success. This wide-use of mobile technology among students has presented a favorable opportunity to employ a laptop program into the undergraduate curriculum. Until recently, the notion of a mandatory laptop program has been limited due to the high price of hardware and software packages. Laptops have long been considered a preferred portable workstation solution, but the cost was prohibitive, especially to students. Due to advances in manufacturing, technology and competition among vendors the financial burden of purchasing and maintaining a laptop has dramatically decreased. Therefore, after years of discussion, the opportunity to implement a laptop program is now viable. This paper will discuss the model used by the authors to create a laptop initiative for all undergraduate students in the department of design and Communication Technology at Indiana University - Purdue University Indianapolis. This paper will focus upon the marketing plan and implementation of the first mandatory laptop endeavor of the School of Engineering Technology. Discussion will include the benefits and rewards of such a program to the institution and student, the planning and assessment of the initiative. © American Society for Engineering Education, 2009.

关键词： Students

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A fast-lock synchronous multi-phase clock generator based on a time-to-digital converter

A fast-lock synchronous multi-phase clock generator based on...

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2009 IEEE International Symposium on Circuits and Systems, ISCAS 2009

作者： Shin, Dongsuk Koo, Jabeom Yun, Won-Joo Young, Jung Choi Kim, Chulwoo Graphics Memory Design Team Hynix Semiconductor Icheon Korea Republic of Department of Electronics and Computer Engineering Korea University Seoul Korea Republic of

ISBN: (纸本)9781424438280

An all-digital fast-lock synchronous multi-phase clock generator is presented. By using a time-to-digital converter for fast-lock operation and delay measurement, the proposed multi-phase clock generator generates four-phase clocks and synchronizes the reference clock with the output clock within 45 cycles. Furthermore, the clock generator uses a fine binary scheme and de-skewing circuit for fine delay measurement and compensation. The proposed clock generator was designed in a 0.18um CMOS technology. It operates over a wide frequency range from 400MHz to 1.22GHz and consumes 34mW at 1.22GHz. ©2009 IEEE.

关键词： Locks (fasteners)

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Modeling buildings for mobile robots

Modeling buildings for mobile robots

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2009 ASCE International Workshop on Computing in Civil Engineering

作者： Borkowski, A. Grabska, E. Palacz, W. Department of Intelligent Systems Institute of Fundamental Technological Research Polish Academy of Sciences 21 Swietokrzyska Str. PL-00-049 Warsaw Poland Department of Computer Design and Graphics Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University 4 Reymonta Str. PL-30-059 Krakow Poland

ISBN: (纸本)9780784410523

In the near future mobile robots accomplishing such tasks as delivery of goods, assistance for handicapped people and surveillance will become increasingly available. The aim of this paper is to show the disparity that exists at present in modeling buildings for the purposes of two domains: Architecture, Engineering & Construction (AEC) and Mobile Robotics (MR). Digital product and process models developed in the AEC-domain give the user a comprehensive insight into the components and functions of the building but they neglect the needs of mobile robot operating autonomously inside the building. On the other hand, researchers in the MR-domain seem to be unaware of the results achieved in the AEC area. During the last decades the main effort in MR was devoted to the autonomous navigation. This resulted in efficient and robust procedures of acquiring floor maps from sensor readings. Further progress requires the robot to understand semantics of the surrounding world. Based on our previous research in the graph-oriented support of the AEC-design, we propose a digital model of the building that will enable the robot to recognize the functionality of particular spaces, to transform CAD-based floor plans into graphs reflecting topology and function of the building, to plan the execution of tasks posed by the human operator and to navigate inside the building. © 2009 ASCE.

关键词： Mobile robots

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A fast-lock synchronous multi-phase clock generator based on a time-to-digital converter

A fast-lock synchronous multi-phase clock generator based on...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Dongsuk Shin Jabeom Koo Won-Joo Yun Young Jung Choi Chulwoo Kim Graphics Memory Design Team Hynix Semiconductor Company Limited Icheon South Korea Department of Electronics and Computer Engineering Korea University Seoul South Korea

ISBN: (纸本)9781424438273

An all-digital fast-lock synchronous multi-phase clock generator is presented. By using a time-to-digital converter for fast-lock operation and delay measurement, the proposed multi-phase clock generator generates four-phase clocks and synchronizes the reference clock with the output clock within 45 cycles. Furthermore, the clock generator uses a fine binary scheme and de-skewing circuit for fine delay measurement and compensation. The proposed clock generator was designed in a 0.18 mum CMOS technology. It operates over a wide frequency range from 400 MHz to 1.22 GHz and consumes 34 mW at 1.22 GHz.

关键词： Clocks Synchronous generators Frequency synchronization Circuits Sampling methods Delay lines Equations CMOS technology Pulse generation Detectors

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The future of television graphics

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computer graphics (ACM) 2008年第2期42卷

作者： Edsall, Samuel Department of Broadcasting Western Illinois University Mass Communication and Computer Graphics Design United States

It is an exciting time to be in television. The advances in digital television, computers, and all the peripherals related to them open the creative gate for television graphic designers. Television is undergoing some... 详细信息

关键词： Digital television

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A 0.17–1.4GHz low-jitter all digital DLL with TDC-based DCC using pulse width detection scheme

A 0.17–1.4GHz low-jitter all digital DLL with TDC-based DCC...

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European Conference on Solid-State Circuits (ESSCIRC)

作者： Dongsuk Shin Won-Joo Yun Hyun-Woo Lee Young-Jung Choi Suki Kim Chulwoo Kim Department of Electronics and Computer Engineering Korea University Seoul South Korea Graphics Memory Design Team Hynix Semiconductor Inc. Icheon South Korea

A wide-range low-jitter digital DLL using 0.18 um single-poly four-metal CMOS technology is proposed that uses an open-loop time-to-digital converter (TDC)-based DCC circuit with 10 cycles of maximum locking time by virtue of pulse width detection scheme. In addition, the DLL uses a semi dual delay line to remove the boundary switching problem and to optimize its area and power consumption. Thus, the proposed DLL operates over a frequency range from 170 MHz to 1.4 GHz. The peak-to-peak jitter is 13.8 ps at 1.4 GHz and the power consumption is reduced to 27 mW.

关键词： Space vector pulse width modulation Delay lines Energy consumption Jitter Frequency Pulse circuits Open loop systems Pulse width modulation converters CMOS technology Logic

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Teaching beyond sustainable awareness: Graduating leed-accredited professionals

Teaching beyond sustainable awareness: Graduating leed-accre...

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114th Annual ASEE Conference and Exposition, 2007

作者： Kilmer, Rosemary Kilmer, Lisa Purdue University United States Department of Visual and Performing Arts Council of Interior Design Accreditation Department of Computer Graphics Technology Interior Design Program Purdue University United States

No abstract available

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Offset approximation algorithm for subdivision surfaces

Offset approximation algorithm for subdivision surfaces

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SNPD 2007: 8th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing

作者： Junqing, Yang Min, Zhou Xiaohong, An Lining, Zhang Department of Computer Engineering Xi'an Aerotechnical College Xi'an 710077 China College of Science Northwestern Polytechnical University Xi'an 710072 China Department of Software Engineering and Graphics Processing Department of Theory of Spline and Geometric Design Department of Theory of Subdivision and Geometric Design

ISBN: (纸本)0769529097

Based on Catmull-Clark Subdivision scheme, a valid algorithm of offset approximation for Subdivision Surface is proposed. It can overcome the defect that previous approaches treat offset surface only as parametric surface, functional surface and algebraic surface. In this paper, by making the limit positions corresponding to new control vertices of offset surface are at their exact offset positions, we convert offset approximation problem into solving linear equation system. We also present a method for error control of offset approximation, meanwhile, how to compute maximum offset distance without self-intersection is discussed. The examples in the paper demonstrate explicitness and efficiency of our method. © 2007 IEEE.

关键词： Surface analysis

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Geometric design of developable Bezier and B-spline parametric surfaces

Geometric design of developable Bezier and B-spline parametr...

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SNPD 2007: 8th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing

作者： Junqing, Yang Min, Zhou Quanyi, Lv Hongchan, Zheng Department of Computer Engineering Xi'an Aerotechnical College Xi'an 710077 China College of Science Northwestern Polytechnical University Xi'an 710072 China Department of Software Engineering and Graphics Processing Department of Theory of Spline and Geometric Design Department of Mathematics and Computation Department of Theory of Subdivision and Geometric Design

ISBN: (纸本)0769529097

Using the concept of duality between points and planes in 3D projective space, an explicit and efficient method of computer-aided design for developable surfaces based on Bezier and B-spline basis functions is proposed. By the result that a developable surface is the envelope of a single-parameter family of planes, we give the parametric equation of a Bezier and B-spline developable surface, and discuss respectively properties of Bezier and B-spline representations. Meanwhile, we also present a simplified geometric-construction for developable surfaces, that is, G2 Beta restraint condition algorithm for G2 continuity between two developable surfaces. It is shown that the geometric construction technique that exists for curves also can be generalized to the design of developable surfaces. © 2007 IEEE.

关键词： Computational geometry

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Idea development and communication through storyboards

Idea development and communication through storyboards

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113th Annual ASEE Conference and Exposition, 2006

作者： Birchman, Judy Sadowski, Mary Purdue University United States Department of Computer Graphics Technology Purdue University United States Graphics Department Engineering Design Graphics Division Undergraduate Programs

Story board creation can be an alternative way of teaching visual problem solving. Expressing a concept or idea showing action, or thinking a problem through from start to finish can be done through storyboards. The very name 'storyboard' implies the ability to tell a story or communicate an idea. The story can be abstract or concrete, however, it requires the student to think through the process and figure out how to present the idea. It can be serious or it can be fun, however, storyboarding asks a student to present an idea in an interesting and carefully crafted manner. This can be done with a pencil or on the computer;however, the tool is not the emphasis. The focus is on the process of developing an idea and communicating it visually. © American Society for Engineering Education, 2006.

关键词： Engineering education

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