WorldWideScience

Sample records for hidden digit designs

  1. On the Extraction of Spread-Spectrum Hidden Data in Digital Media

    Science.gov (United States)

    2012-06-01

    hiding, information hiding, spread-spectrum embedding, steganalysis, steganography , watermarking. I. INTRODUCTION Digital data embedding in digital...tampering, hidden low-probability-to- detect identification for confidential data validation, etc.) and steganography whose purpose is to establish covert...M. J. Medley, “Optimal signature design for spread-spectrum steganography ,” IEEE Trans. Image Proc., vol. 16, pp. 391-405, Feb. 2007. [6] M. Gkizeli

  2. Hidden realities inside PBL design processes

    DEFF Research Database (Denmark)

    Pihl, Ole Verner

    2015-01-01

    Design Process, but is a group-based architecture and design education better than that which is individually based? How does PBL affect space, form, and creative processes? Hans Kiib, professor and one of the founders of the Department of Architecture and Design in Aalborg, describes his intentions...... within the group work, as it is closer related to the actual PBL process”. Is the Integrated Design Process (Knudstrup 2004) and is Colb (1975) still current and valid? Can we still use these methodologies when we must create “learning for an unknown future,” as Ronald Barnett (2004) claims that we...... investigates the creative processes of the collective and the individual and clarifies some of the hidden realities behind the PBL-based creative processes, both through an inquiry with the students and a more methodological and theoretical approach. The paper also explores how to integrate artistic...

  3. Improved digital thermometer design.

    Science.gov (United States)

    Swift, C S

    1981-01-01

    A simple digital thermometer design using a self-contained 3 1/2 digit LCD meter module is presented. The Celsius-reading (Centigrade) thermometer is powered by a single 9-V battery, has very low power drain, and uses an inexpensive NPN silicon transistor for the temperature sensor. A short bibliography on temperature measurement instrumentation is included.

  4. Digital Art and Design

    Directory of Open Access Journals (Sweden)

    Khaldoun A. A. BESOUL

    2006-07-01

    Full Text Available The desire to create unique things and give free rain to one's imagination served as a powerful impetus to the development of digital art and design software. The commoner was the use of computers the wider variety of professional software was developed. Nowadays the creators and computer designers are receiving more and more new and advanced programs that allow their ideas becoming virtual reality. This research paper looks at the history of the development of graphic editors from the simplest to the most modern and advanced. This brief survey includes the history of different graphic editors’ creation, their features and abilities. This paper highlights the two basic branches of graphic editors – these that are in free use and commercial graphic editors design software. The researcher selected the most powerful and influential graphic editors design software brands like Paint.NET and GIMP among free software and commercial Adobe Photoshop. This paper also dwells upon the way digital art transferred from the exclusively professional business into the hobby for ordinary users. This research paper bears implications for those who are interested in features and potentiality of most popular graphic editors design software.

  5. Hidden realities inside PBL design processes

    DEFF Research Database (Denmark)

    Pihl, Ole Verner

    2015-01-01

    Design Process, but is a group-based architecture and design education better than that which is individually based? How does PBL affect space, form, and creative processes? Hans Kiib, professor and one of the founders of the Department of Architecture and Design in Aalborg, describes his intentions...... within the group work, as it is closer related to the actual PBL process”. Is the Integrated Design Process (Knudstrup 2004) and is Colb (1975) still current and valid? Can we still use these methodologies when we must create “learning for an unknown future,” as Ronald Barnett (2004) claims that we...... are passing from a complex world into one based on super complexity? Could Gaston Bachelard (1958), who writes in his book The Poetic of Space "that poets and artists are born phenomenologists," help architecture and design students in their journey to find his/her own professional expression? This paper...

  6. Digital design and computer architecture

    CERN Document Server

    Harris, David

    2010-01-01

    Digital Design and Computer Architecture is designed for courses that combine digital logic design with computer organization/architecture or that teach these subjects as a two-course sequence. Digital Design and Computer Architecture begins with a modern approach by rigorously covering the fundamentals of digital logic design and then introducing Hardware Description Languages (HDLs). Featuring examples of the two most widely-used HDLs, VHDL and Verilog, the first half of the text prepares the reader for what follows in the second: the design of a MIPS Processor. By the end of D

  7. Hidden realities inside PBL design processes

    DEFF Research Database (Denmark)

    Pihl, Ole Verner

    2015-01-01

    for the education as being intuition, reflection, artistic progression and critical interpretation (Kiib 2004). “As the reflection and critical interpretation are well integrated within the education, mostly parts of the exam evaluation, it seems like the artistic progression and intuition are somewhat drowning...... are passing from a complex world into one based on super complexity? Could Gaston Bachelard (1958), who writes in his book The Poetic of Space "that poets and artists are born phenomenologists," help architecture and design students in their journey to find his/her own professional expression? This paper...

  8. Design and Implementation of Domain based Semantic Hidden Web Crawler

    OpenAIRE

    Manvi; Bhatia, Komal Kumar; Dixit, Ashutosh

    2015-01-01

    Web is a wide term which mainly consists of surface web and hidden web. One can easily access the surface web using traditional web crawlers, but they are not able to crawl the hidden portion of the web. These traditional crawlers retrieve contents from web pages, which are linked by hyperlinks ignoring the information hidden behind form pages, which cannot be extracted using simple hyperlink structure. Thus, they ignore large amount of data hidden behind search forms. This paper emphasizes o...

  9. Topography of hidden objects using THz digital holography with multi-beam interferences.

    Science.gov (United States)

    Valzania, Lorenzo; Zolliker, Peter; Hack, Erwin

    2017-05-15

    We present a method for the separation of the signal scattered from an object hidden behind a THz-transparent sample in the framework of THz digital holography in reflection. It combines three images of different interference patterns to retrieve the amplitude and phase distribution of the object beam. Comparison of simulated with experimental images obtained from a metallic resolution target behind a Teflon plate demonstrates that the interference patterns can be described in the simple form of three-beam interference. Holographic reconstructions after the application of the method show a considerable improvement compared to standard reconstructions exclusively based on Fourier transform phase retrieval.

  10. Digital Animation Character Creation Design

    Institute of Scientific and Technical Information of China (English)

    潘锋

    2014-01-01

    The purpose of this article is to discuss the proper method for Chinese digital animation character design on the foundation of certain cultural elements. The method used in this study is known as comparative analysis of Disney and Japanese animation styles in action, appearance, facial expression and voice design. These dynamic factors are the best carrier of the animation spirit and native culture, so it is important to take the dynamic factors into account when producing the digital animation, and it will be an excellent starting point to innovate Chinese digital animation.

  11. Digital system design with VHDL

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Jin Gu; Lee, Da Young; Song, Je Chel

    2000-09-15

    This book is comprised of eleven chapters, which are review of basic logic design including combinational logic circuit, KARNAUGH MAPS, Hazard of combinational circuit, Melay order circuit design and synchronous design, introduction of VHDL like VHDL module of Multiplexer and VHDL Function, design with PLD for program, circuit design for arithmetical operation, digital design using SM chart, PGA and CPLD design, Floating-point calculation, extra issues on VHDL, VHDL module for memory and bus,design for hardware test and a testing and examples for design such as UART design and M68HC05 micro controller.

  12. Design in the digital textbook

    DEFF Research Database (Denmark)

    Ebbesen, Toke Riis

    reorganization of the publishing company, web based user interfaces, and ultimately the branding, that market these new digital objects, are building powerful discourses around the product. Thus it is suggested that the design process of the iBog-case can be understood in a model of database-based publishing......Building on a preliminary case study of the Danish educational publisher, Systime A/S, and its flagship product, the web based ‘iBog’ {Systime 2014}, this paper explores how digital textbooks can be understood as design. The shaping of digital books is seen as intertwined in a wider circuit...... with multiple levels. In the final analysis, the iBog is much more than a product and a technology. It is a brand that goes beyond what can be studied by looking at the digital textbook as a singular artefact....

  13. Optimization Design for Digital Binoculars

    Institute of Scientific and Technical Information of China (English)

    CEN Jun-bo; CHEN Wei-min; LI Hui; HUANG Shang-lian

    2005-01-01

    In order to develop competitive and high performance/cost ratio of digital binoculars, design scheme should be optimized in term of technical capacity, economic benefit, product performance, risk management, etc. The common optimization method is limited in qualitative analysis, and the parameter optimization method is limited in obtaining optimal parameter only from technical side. Each method has its limitation. Based on the analysis of digital binoculars parameters, optional design schemes are laid down.Analytic hierarchy process combined the qualitative analysis with the quantitative analysis together. The design schemes are optimized, and result is worked out.

  14. May Stakeholders be Involved in Design Without Informed Consent? The Case of Hidden Design.

    Science.gov (United States)

    Pols, A J K

    2017-06-01

    Stakeholder involvement in design is desirable from both a practical and an ethical point of view. It is difficult to do well, however, and some problems recur again and again, both of a practical nature, e.g. stakeholders acting strategically rather than openly, and of an ethical nature, e.g. power imbalances unduly affecting the outcome of the process. Hidden Design has been proposed as a method to deal with the practical problems of stakeholder involvement. It aims to do so by taking the observation of stakeholder actions, rather than the outcomes of a deliberative process, as its input. Furthermore, it hides from stakeholders the fact that a design process is taking place so that they will not behave differently than they otherwise would. Both aspects of Hidden Design have raised ethical worries. In this paper I make an ethical analysis of what it means for a design process to leave participants uninformed or deceived rather than acquiring their informed consent beforehand, and to use observation of actions rather than deliberation as input for design, using Hidden Design as a case study. This analysis is based on two sets of normative guidelines: the ethical guidelines for psychological research involving deception or uninformed participants from two professional psychological organisations, and Habermasian norms for a fair and just (deliberative) process. It supports the conclusion that stakeholder involvement in design organised in this way can be ethically acceptable, though under a number of conditions and constraints.

  15. ARSITEKTUR DVD (Digital Virtual Design

    Directory of Open Access Journals (Sweden)

    Danny Santoso Mintorogo

    2000-01-01

    Full Text Available Soon after the millennium year of 2000 and toward 21th century, the ways of architecture design will be a great change from traditional hand design and drawings to super computer digital virtual design models with tremendous of high-end architectural 3D software domains. Virtual Technology will be a plus to architectural design stage to obtain several "scheme" and observe with real - time feedback of the quality (height, light, furniture, shape, and environment as well as the sequential of the space, site context or massing studies. Abstract in Bahasa Indonesia : Strategi dalam desain arsitektur pada abad 22 atau setelah tahun milinium 2000 ini akan banyak didominasi dengan perangkap teknologi canggih yang tentunya akan mengandalkan pada perangkap keras (komputer dan perangkap lunak (software untuk tujuan desain arsitektur secara digital. Teknologi "Virtual" akan dimanfaatkan untuk bidang arsitektur dalam mengoptimasikan disain arsitektur secara digital maya, untuk mengobservasi/mengkaji kwalitas ruang, model suatu ruang/massa secara maya dalam phase perancangan arsitektur. Kata kunci: arsitektur, desain, digital, maya.

  16. Interface design for digital courses

    NARCIS (Netherlands)

    Tabbers, Huib; Kester, Liesbeth; Hummel, Hans; Nadolski, Rob

    2005-01-01

    This text should be referred to as: Tabbers, H., Kester, L., Hummel, H. G. K., & Nadolski, R. J. (2003). Interface design for digital courses. In W. Jochems, J. van Merriënboer, & R. Koper (Eds). Integrated e-learning: implications for pedagogy, technology & organisation (pp. 100-111). London: Routl

  17. Interface design for digital courses

    NARCIS (Netherlands)

    Tabbers, Huib; Kester, Liesbeth; Hummel, Hans; Nadolski, Rob

    2005-01-01

    This text should be referred to as: Tabbers, H., Kester, L., Hummel, H. G. K., & Nadolski, R. J. (2003). Interface design for digital courses. In W. Jochems, J. van Merriënboer, & R. Koper (Eds). Integrated e-learning: implications for pedagogy, technology & organisation (pp. 100-111). London: Routl

  18. FORTRAN IV Digital Filter Design Programs. Digital Systems Education Project.

    Science.gov (United States)

    Reuss, E.; And Others

    The goals of the Digital Systems Education Project (DISE) include the development and distribution of educational/instructional materials in the digital systems area. Toward that end, this document contains three reports: (1) A FORTRAN IV Design Program for Low-Pass Butterworth and Chebychev Digital Filters; (2) A FORTRAN IV Design Program for…

  19. Digital Jacquard Fabric Design in Colorful Mode

    Institute of Scientific and Technical Information of China (English)

    周赳

    2004-01-01

    Digital image design is one of advanced technique in textile design. The investigation into digital Jacquard textile design in the colorful mode is one form of research in digital Jacquard fabric design, which aimed at expanding past and present jacquard design and production methods towards innovative ends. In this paper, the design principles and design methods for unconventional digital Jacquard fabric design in colorful mode have been analyzed based on the new technologies and computer applied color theory. The results of this study will enhance further research in the area of digital textile.

  20. A novel design of hidden web crawler using ontology

    OpenAIRE

    Manvi; Bhatia, Komal Kumar; Dixit, Ashutosh

    2015-01-01

    Deep Web is content hidden behind HTML forms. Since it represents a large portion of the structured, unstructured and dynamic data on the Web, accessing Deep-Web content has been a long challenge for the database community. This paper describes a crawler for accessing Deep-Web using Ontologies. Performance evaluation of the proposed work showed that this new approach has promising results.

  1. Digital Games, Design, and Learning

    Science.gov (United States)

    Clark, Douglas B.; Tanner-Smith, Emily E.; Killingsworth, Stephen S.

    2016-01-01

    In this meta-analysis, we systematically reviewed research on digital games and learning for K–16 students. We synthesized comparisons of game versus nongame conditions (i.e., media comparisons) and comparisons of augmented games versus standard game designs (i.e., value-added comparisons). We used random-effects meta-regression models with robust variance estimates to summarize overall effects and explore potential moderator effects. Results from media comparisons indicated that digital games significantly enhanced student learning relative to nongame conditions (g¯ = 0.33, 95% confidence interval [0.19, 0.48], k = 57, n = 209). Results from value-added comparisons indicated significant learning benefits associated with augmented game designs (g¯ = 0.34, 95% confidence interval [0.17, 0.51], k = 20, n = 40). Moderator analyses demonstrated that effects varied across various game mechanics characteristics, visual and narrative characteristics, and research quality characteristics. Taken together, the results highlight the affordances of games for learning as well as the key role of design beyond medium. PMID:26937054

  2. Digital computer structure and design

    CERN Document Server

    Townsend, R

    2014-01-01

    Digital Computer Structure and Design, Second Edition discusses switching theory, counters, sequential circuits, number representation, and arithmetic functions The book also describes computer memories, the processor, data flow system of the processor, the processor control system, and the input-output system. Switching theory, which is purely a mathematical concept, centers on the properties of interconnected networks of ""gates."" The theory deals with binary functions of 1 and 0 which can change instantaneously from one to the other without intermediate values. The binary number system is

  3. Design Thinking for Digital Fabrication in Education

    DEFF Research Database (Denmark)

    Smith, Rachel Charlotte; Iversen, Ole Sejer; Hjorth, Mikkel

    2015-01-01

    In this paper, we argue that digital fabrication in education may benefit from design thinking, to foster a more profound understanding of digital fabrication processes among students. Two related studies of digital fabrication in education are presented in the paper. In an observational study we...... found that students (eleven to fifteen) lacked an understanding of the complexity of the digital fabrication process impeding on the potentials of digital fabrication in education. In a second explorative research through design study, we investigated how a focus on design thinking affected the students......’ performance in digital fabrication processes. Our findings indicate that design thinking can provide students with a general understanding of the creative and complex process through which artifacts and futures emerge in processes of digital fabrication....

  4. Sketching in digital clay: Digital sculpture for costume design visualization

    OpenAIRE

    Armstrong, Barry; Unver, Ertu; Taylor, Andrew

    2012-01-01

    Background\\ud ‘Costume Illustration in the Digital Age: Creating a Costume Technical Sheet’\\ud (Bradley, 2009) explores the benefits of using 2D digital character templates and drawing software to improve the visual quality and accurate communication of costume designs. This practice-based research expands upon Bradley’s work through the creation of 3D digital costume templates for use within 3D digital sculpture software.\\ud  \\ud Method: \\ud Problems are identified within existing costume vi...

  5. Construction safety and digital design: a review

    OpenAIRE

    Zhou, Wei; Whyte, Jennifer; Sacks, Rafael

    2012-01-01

    As digital technologies become widely used in designing buildings and infrastructure, questions arise about\\ud their impacts on construction safety. This review explores relationships between construction safety and\\ud digital design practices with the aim of fostering and directing further research. It surveys state-of-the-art\\ud research on databases, virtual reality, geographic information systems, 4D CAD, building information\\ud modeling and sensing technologies, finding various digital t...

  6. Digital hydraulic valving system. [design and development

    Science.gov (United States)

    1973-01-01

    The design and development are reported of a digital hydraulic valving system that would accept direct digital inputs. Topics include: summary of contractual accomplishments, design and function description, valve parameters and calculations, conclusions, and recommendations. The electrical control circuit operating procedure is outlined in an appendix.

  7. Designing meaningful intergenerational digital games

    NARCIS (Netherlands)

    Loos, Eugène|info:eu-repo/dai/nl/078758475

    2014-01-01

    This paper will focus on intergenerational digital games between grandparents and their grandchildren, which could enhance not only their physical and social well-being but also social bonding between them. This is a topic which has been neglected in digital game research. Therefore, after having

  8. Designing meaningful intergenerational digital games

    NARCIS (Netherlands)

    Loos, Eugène

    2014-01-01

    This paper will focus on intergenerational digital games between grandparents and their grandchildren, which could enhance not only their physical and social well-being but also social bonding between them. This is a topic which has been neglected in digital game research. Therefore, after having di

  9. Satisfactory Optimization Design of IIR Digital Filters

    Institute of Scientific and Technical Information of China (English)

    Jin Weidong; Zhang Gexiang; Zhao Duo

    2005-01-01

    A new method called satisfactory optimization method is proposed to design IIR (Infinite Impulse Response) digital filters, and the satisfactory optimization model is presented. The detailed algorithm of designing IIR digital filters using satisfactory optimization method is described. By using quantum genetic algorithm characterized by rapid convergence and good global search capability, the satisfying solutions are achieved in the experiment of designing lowpass and bandpass IIR digital filters. Experimental results show that the performances of IIR filters designed by the introduced method are better than those by traditional methods.

  10. Designers' cognition in traditional versus digital media during conceptual design

    OpenAIRE

    Bilda, Zafer

    2001-01-01

    Cataloged from PDF version of article. Designers depend on representations to externalize their design thoughts. External representations are usually in the form of sketches (referred to as traditional media) in architectural design during the conceptual design. There are also attempts to integrate the use of digital representations into the conceptual design in order to construct a digital design medium. This thesis aims at gaining an insight on designers’ cognitive process...

  11. Design and Testing of Digital Microfluidic Biochips

    CERN Document Server

    Zhao, Yang

    2013-01-01

    This book provides a comprehensive methodology for automated design, test and diagnosis, and use of robust, low-cost, and manufacturable digital microfluidic systems. It focuses on the development of a comprehensive CAD optimization framework for digital microfluidic biochips that unifies different design problems. With the increase in system complexity and integration levels, biochip designers can utilize the design methods described in this book to evaluate different design alternatives, and carry out design-space exploration to obtain the best design point. Describes practical design automation tools that address different design problems (e.g., synthesis, droplet routing, control-pin mapping, testing and diagnosis, and error recovery) in a unified manner; Applies test pattern generation and error-recovery techniques for digital microfluidics-based biochips; Uses real bioassays as evaluation examples, e.g., multiplexed in vitro human physiological fluids diagnostics, PCR, protein crystallization.  

  12. Digital Production and Students as Learning Designers

    DEFF Research Database (Denmark)

    Sørensen, Birgitte Holm; Levinsen, Karin

    2014-01-01

    Today’s digitalization allows users to interact, collaborate, communicate and create user-generated content. The technology is intuitive and easy to use even for young children, and new learning opportunities emerge. Particularly, students’ production as a learning form benefits from digitalization...... as the new opportunities enable young students to integrate their playing competencies and skills into the formal school learning. This paper presents and discusses a theory regarding students’ digital production from a learning and design-for-learning perspective, which is generated based on the project...... and agency, and in the study, we have examined and found that students are capable of operating as learning designers....

  13. Digital Design of Virtual Prototype based on Multidisciplinary Design Optimization

    Institute of Scientific and Technical Information of China (English)

    WU Baogui; HUANG Hongzhong; TAO Ye

    2006-01-01

    In order to obtain digital design of complex mechanical product as optimal as possible in an efficient way, multidiscipline integrated design method is proposed, which integrates multidisciplinary design optimization (MDO) into digital design process to design virtual prototype (VP) efficiently. Through combining MDO and multi-body system dynamics, MDO integration platform, which takes VP as the core, is constructed. Then automated MDO design of VP is realized and changes of mechanical design project can be expressed intuitively during MDO design process. The proposed approach is also demonstrated by using integrated analyzing flow of vehicle engineering design. The result shows that the method not only can feasibly realize the MDO of VP, but also can solve the optimization problem of vehicle multi-body system dynamic performance. It can be adopted to the digital design of other complex system.

  14. Digital Modeling and Shaping of Design Practices

    DEFF Research Database (Denmark)

    Reijonen, Satu

    This paper focuses on the role of digital modeling in shaping coordinative practices between architects and energy engineers in construction design. The paper presents a case study of the use of an energy performance calculation programme, a numeric digital modeling tool, that not only enables......, 2010), and the socio-material constructivist studies of technology (Akrich 1992, Akrich et al. 2000, Latour 1991). The programme influences the coordinative practices in following ways: it shapes the modus of interaction between energy engineers and architects and enforces particular jurisdictional...... of this study suggest that generative potential of digital modeling tools such as the calculation programme resides in their ability to restrictively define the possible roles in, focus of and sequence of working. In addition, digital modeling provides a separate medium with the help of which the design object...

  15. Digital Hardware Design Teaching: An Alternative Approach

    Science.gov (United States)

    Benkrid, Khaled; Clayton, Thomas

    2012-01-01

    This article presents the design and implementation of a complete review of undergraduate digital hardware design teaching in the School of Engineering at the University of Edinburgh. Four guiding principles have been used in this exercise: learning-outcome driven teaching, deep learning, affordability, and flexibility. This has identified…

  16. Digital Hardware Design Teaching: An Alternative Approach

    Science.gov (United States)

    Benkrid, Khaled; Clayton, Thomas

    2012-01-01

    This article presents the design and implementation of a complete review of undergraduate digital hardware design teaching in the School of Engineering at the University of Edinburgh. Four guiding principles have been used in this exercise: learning-outcome driven teaching, deep learning, affordability, and flexibility. This has identified…

  17. Principles of modern digital design

    CERN Document Server

    Lala, Parag K

    2007-01-01

    A major objective of this book is to fill the gap between traditional logic design principles and logic design/optimization techniques used in practice. Over the last two decades several techniques for computer-aided design and optimization of logic circuits have been developed. However, underlying theories of these techniques are inadequately covered or not covered at all in undergraduate text books. This book covers not only the ""classical"" material found in current text books but also selected materials that modern logic designers need to be familiar with.

  18. Design of Digital Hybrid Chaotic Sequence Generator

    Institute of Scientific and Technical Information of China (English)

    RAO Nini; ZENG Dong

    2004-01-01

    The feasibility of the hybrid chaotic sequences as the spreading codes in code divided multiple access(CDMA) system is analyzed.The design and realization of the digital hybrid chaotic sequence generator by very high speed integrated circuit hardware description language(VHDL) are described.A valid hazard canceledl method is presented.Computer simulations show that the stable digital sequence waveforms can be produced.The correlations of the digital hybrid chaotic sequences are compared with those of m-sequences.The results show that the correlations of the digital hybrid chaotic sequences are almost as good as those of m-sequences.The works in this paper explored a road for the practical applications of chaos.

  19. Design and Implementation of Wave Digital Filters

    Directory of Open Access Journals (Sweden)

    V. Davidek

    2001-09-01

    Full Text Available One of possibilities of the Wave Digital Filters (WDF design isusing the classical LC-filters theory. The aim of this paper is todemonstrate the design of WDF from the LC filter and the implementationof WDF on the fixed-point digital signal processor. The theory of wavedigital filter has been developed by using the classical scatteringparameter theory. The theory of ladder filters is well-known, and soour present problem can thus be reduced to a problem how to replace theL and C elements of the filters by adaptors and delay elements, addersand multipliers.

  20. Revealing of steganograms with data, which are hidden in transformation domain of digital images

    Directory of Open Access Journals (Sweden)

    D. O. Progonov

    2014-06-01

    Full Text Available Introduction. The paper is devoted to analysis the correlation and fractal properties of bright¬ness fluctuation the steganograms. The case of multistage embedding the modified stegodata in transformation domain of digital images is considered. Data hiding in transformation domain of digital images. The Gunjal method of message hiding in digital images is investigated. The method is based on usage of Arnold transform for mangling the stegodata. Embedding of modified message is carried out by applying of two-dimensional discrete wavelet transform and block two-dimensional discrete cosine transform. Multifractal detrended fluctuation analysis of digital images. The correlation and fractal characteristics of the digital images noise components are consider. It is shown the advanta¬ges of multifractal detrended fluctuation analysis over classic detrended fluctuation analysis – the representation of signal fluctuation as set of monofractal aggregates with corresponding generalized Hurst exponents. Conclusion. Data hiding in transformation domain of digital images leads to smoothing of spectrum the generalized Hurst exponents and narrowing the multifractal spectrum of fluctuations. It is established that ascertained disclosure features do not depend on degree of container filling.

  1. Interface design for digital courses

    NARCIS (Netherlands)

    Tabbers, H.; Kester, L.; Hummel, H.; Nadolski, R.; Jochems, W.; Merriënboer, J.; Koper, R.

    2003-01-01

    An important question in web-based education is how to deal with the design of the interface. What will the actual screen look like? Two main issues that are especially relevant for educational purposes are discussed, both from a Human-Computer Interaction and an Educational Psychology perspective.

  2. Digital Gaming and Sustainable Design

    Directory of Open Access Journals (Sweden)

    Shahin Vassigh

    2012-10-01

    Full Text Available The American building industry is one of the major consumers of energy. Buildings use 39% of thetotal energy consumed in the United States, significantly impacting national energy demand andcontributing to global warming. The vast majority of architectural practice in US leads to construction of buildings with a little concern to sustainability leading to environmental degradation. Although the bulk of architecture practice continues to produce unsustainable buildings, there is growing stream of exemplary models of sustainable design. Examining the success of suchpractices leads into two a two-folded finding; first that achieving sustainable design is closelylinked to “integrated Design”1 - a type of practice in which various disciplines involved in building design work together to achieve efficiency and other synergetic benefits. Second is that theadvances in computing and simulation algorithms are paving the way to achieve “integrateddesign”. These technologies are enabling the designers to collaborate, visualize, foresee, andmodify building performance with relatively high accuracy. They are increasing used to analyze complex systems to achieve streamlined structures, reduce dependence on mechanical systems, produce more effective construction processes, and reduce waste.If such practices were to become widespread, the architectural education needs to be restructured.The traditional American architectural curriculum that is based on a schism between“design” and “technology” is inherently in conflict with the principal of integration. Though largescalereform of architectural curricula is a complex, ongoing, and difficult debate; producing teaching tools that can simulate integrated design can impact and promote an understanding of sustainable practice in architecture. The proposed paper will present the progress of a multi-disciplinary team of faculty who arecollectively working on the completion, implementation and evaluation

  3. Design of digital systems and devices

    CERN Document Server

    Adamski, Marian; Wegrzyn, Marek

    2011-01-01

    This book includes a variety of design and test methods targeted on different digital devices, as well as different logic elements. The authors of the book represent such countries as Israel, Poland, Russia, and Ukraine. The book is divided by three main parts, including thirteen different Chapters.

  4. Designing and Managing Your Digital Library.

    Science.gov (United States)

    Guenther, Kim

    2000-01-01

    Discusses digital libraries and Web site design issues. Highlights include accessibility issues, including standards, markup languages like HTML and XML, and metadata; building virtual communities; the use of Web portals for customized delivery of information; quality assurance tools, including data mining; and determining user needs, including…

  5. Between Assessments, Digital Technologies and Big Data: The Growing Influence of "Hidden" Data Mediators in Education

    Science.gov (United States)

    Hartong, Sigrid

    2016-01-01

    The past few decades have witnessed a global enforcement of "governance by data" in education policy, including a significant increase of assessments and quantified evaluation. Within this context, this article focuses particularly on the intensifying evolvement of new (digital) information technologies and "mediated"…

  6. Multimedia foundations core concepts for digital design

    CERN Document Server

    Costello, Vic; Youngblood, Susan

    2012-01-01

    Understand the core concepts and skills of multimedia production and digital storytelling using text, graphics, photographs, sound, motion, and video. Then, put it all together using the skills that you have developed for effective project planning, collaboration, visual communication, and graphic design. Presented in full color with hundreds of vibrant illustrations, Multimedia Foundations trains you in the principles and skill sets common to all forms of digital media production, enabling you to create successful, engaging content, no matter what tools you are using. Companion website

  7. An Investigation of Digital Payment Platform Designs

    DEFF Research Database (Denmark)

    Kazan, Erol; Damsgaard, Jan

    2014-01-01

    platforms that combines platform, technology and business design aspects. The framework is applied to conduct a comparative case study of digital payment platforms. Four types of market actors are considered: banks, mobile network operators, merchants, and startups, which are incumbents and disrupters....... By hosting third-party services, payment instruments are evolving from single-purpose to multi-functional ones. Our research extends existing payment literature from the MSP perspective to emphasize certain digital payment platform components, which impact strategies and complementary products....

  8. Principle and Method for Structural Design of Digital Woven Fabric

    Institute of Scientific and Technical Information of China (English)

    ZHOU Jiu; NG Frankie

    2006-01-01

    Digital woven textiles are one of the latest research areas of digital textiles. The key of research on design of digital woven fabrics lies in structural design. Nowadays, the application of digital design technology has fundamentally changed the concept of structural design of woven fabric,giving rise to design methods and effects that were deemed impossible before. A study has been carried out to analyze the nature of woven structures and the methods of structural design. This paper proposes an innovative principle and method of structural design under digital design concept, on which the design of digital gamut weaves and establishment of weave-database were presented to meet the requirement of balanced interlacement. It is envisaged that the results of this study will enhance future research in creation of digital woven fabrics, with particular emphasis on digital jacquard fabrics. Meanwhile, this study is also laid the foundation for the intelligent design of woven textile.

  9. Digital Production and Students as Learning Designers

    Directory of Open Access Journals (Sweden)

    Birgitte Holm Sørensen

    2014-12-01

    Full Text Available Today’s digitalization allows users to interact, collaborate, communicate and create user-generated content. The technology is intuitive and easy to use even for young children, and new learning opportunities emerge. Particularly, students’ production as a learning form benefits from digitalization as the new opportunities enable young students to integrate their playing competencies and skills into the formal school learning. This paper presents and discusses a theory regarding students’ digital production from a learning and design-for-learning perspective, which is generated based on the project Netbook 1:1 (2009–2012, where information and communication technology (ICT was readily accessible for each child at school and at home in grades 1–3 at two Danish public schools. The paper presents a Four Levels Design for Learning Model, which can be used for both design for learning and analyses of learning processes. The discussion is supported by empirical examples from the project, which explored emerging relations amongst ICT, production and subject matter-specific practice (Danish, mathematics and interdisciplinary activities. We understand design for learning as related to both process and agency, and in the study, we have examined and found that students are capable of operating as learning designers.

  10. Special design topics in digital wideband receivers

    CERN Document Server

    Tsui, James B Y

    2009-01-01

    Offering engineers a thorough examination of special, more advanced aspects of digital wideband receiver design, this practical book builds on fundamental resources on the topic, helping you gain a more comprehensive understanding of the subject. This in-depth volume presents a detailed look at a complete receiver design, including the encoder. Moreover, it discusses the detection of exotic signals and provides authoritative guidance on designing receivers used in electronic warfare. From frequency modulation and biphase shifting keys, to parameter encoders in electronic warfare receivers and

  11. The Moab Design for Digital Object Versioning

    Directory of Open Access Journals (Sweden)

    Richard Anderson

    2013-07-01

    Full Text Available The Stanford Digital Repository has adopted the "Moab" design for versioned archiving of digital objects--a locally developed approach that optimizes data transfer, storage, and replication while providing efficient single file retrieval or full object reconstruction for any version of an object. This paper includes a review of various versioning strategies including forward-delta, reverse-delta and content-addressable mechanisms, the pro's and cons of each, and highlights the relative advantages of the Moab design. In our approach, the fixity information of a file manifestation is used as its primary identifier and the filename is treated as metadata. Storage and retrieval of an object's files is faciliated by mapping between a virtual version inventory and the physical location via a file signature catalog.

  12. The Urban Design Hiddening in Life%隐于生活的城市设计

    Institute of Scientific and Technical Information of China (English)

    贺鹏

    2013-01-01

    Urban design focused on the areas of urban space, but the general design always focus on shaping the large public space and ignore the smal space hidden in life which is closely related to our daily lives. Hardly imagine, the casual moment in city wil be the best space in our life.%城市设计的内容集中在城市空间范畴,然而一般的设计都着重对大型公共空间进行塑造,而隐藏于生活之中和我们日常生活密切相关的小空间却总是被忽略。殊不知,城市中那些不经意的瞬间却会是我们生活中最美好的空间。

  13. Integrated Digital Design Tool for Form Finding

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning

    2009-01-01

    The present paper outlines the idea of a conceptual design tool which can be used in the early conceptual design phase. The tool is based on a parametric approach using Generative Components with embedded structural analysis. Each of these components uses the geometry, material properties and fixed...... point characteristics to calculate the dimensions and subsequent feasibility of any architectural design. The proposed conceptual design tool provides the possibility for the architect to work with both the aesthetic as well as the structural aspects of architecture without jumping from aesthetics...... to structural digital design tools and back, but to work with both simultaneously and real time. The engineering level of knowledge is incorporated at a conceptual thinking level, i.e. qualitative information is used in stead of using quantitative information. An example with a static determinate roof structure...

  14. Transceiver and system design for digital communications

    CERN Document Server

    Bullock, Scott

    2009-01-01

    Now in a 3rd edition, this successful book provides an intuitive approach to transceiver design, allowing a broad spectrum of readers to understand the topics clearly. It covers a wide range of data link communication design techniques, including link budgets, dynamic range and system analysis of receivers and transmitters used in data link communications, digital modulation and demodulation techniques of phase-shift keyed and frequency hopped spread spectrum systems using phase diagrams, multipath, gain control, an intuitive approach to probability, jamming reduction method using various adap

  15. The Challenges of Designing Digital Services for Multiple Mobile Platforms

    DEFF Research Database (Denmark)

    Ghazawneh, Ahmad

    2016-01-01

    to tap into and join the digital ecosystem. However, while there is an emerging literature on designing digital services, little empirical evidence exists about challenges faced by third-party developers while designing digital services, and in particular for multiple mobile platforms. Drawing......The value of digital services is increasingly recognized by owners of digital platforms. These services have central role in building and sustaining the business of the digital platform. In order to sustain the design of digital services, owners of digital platforms encourage third-party developers...... on a multiple case study of three mobile application development firms from Sweden, Denmark and Norway, we synthesize the digital service design taxonomy to understand the challenges faced by third-party developers. Our study identifies a set of challenges in four different levels: user level, platform level...

  16. Digital media and the beginning designer.

    Science.gov (United States)

    Goldman, Glenn

    2012-01-01

    Use and creation of computer graphics can be effectively taught to beginning design students in the context of discipline-specific design projects. In particular, a case study of the pedagogy implemented by the New Jersey Institute of Technology's College of Architecture + Design provides examples of how teachers harness the students' desire to create and provide educational opportunities for undergraduates to learn about the use of digital media in the processes and products of design. Employing a carefully constructed sequence, students are exposed to (and use) computer applications for raster imaging, vector drawing, 3D modeling and rendering, and eventually building information modeling and time-based sequential representation all while producing original work through analysis and synthesis.

  17. Digital design (Verilog) an embedded systems approach using Verilog

    CERN Document Server

    Ashenden, Peter J

    2007-01-01

    Digital Design: An Embedded Systems Approach Using Verilog provides a foundation in digital design for students in computer engineering, electrical engineering and computer science courses. It takes an up-to-date and modern approach of presenting digital logic design as an activity in a larger systems design context. Rather than focus on aspects of digital design that have little relevance in a realistic design context, this book concentrates on modern and evolving knowledge and design skills. Hardware description language (HDL)-based design and verification is emphasized--Veril

  18. Digital design (VHDL) an embedded systems approach using VHDL

    CERN Document Server

    Ashenden, Peter J

    2007-01-01

    Digital Design: An Embedded Systems Approach Using VHDL provides a foundation in digital design for students in computer engineering, electrical engineering and computer science courses. It takes an up-to-date and modern approach of presenting digital logic design as an activity in a larger systems design context. Rather than focus on aspects of digital design that have little relevance in a realistic design context, this book concentrates on modern and evolving knowledge and design skills. Hardware description language (HDL)-based design and verification is emphasized--VHDL exa

  19. The Study of Tactical Missile's Airframe Digital Optimization Design

    Institute of Scientific and Technical Information of China (English)

    LUO Zhiqing; QIAN Airong; LI Xuefeng; GAO Lin; LEI Jian

    2006-01-01

    Digital design and optimal are very important in modern design. The traditional design methods and procedure are not fit for the modern missile weapons research and development. Digital design methods and optimal ideas were employed to deal with this problem. The disadvantages of the traditional missile's airframe design procedure and the advantages of the digital design methods were discussed. A new concept of design process reengineering (DPR) was put forward. An integrated missile airframe digital design platform and the digital design procedure, which integrated the optimization ideas and methods, were developed. Case study showed that the design platform and the design procedure could improve the efficiency and quality of missile's airframe design, and get the more reasonable and optimal results.

  20. Energy-aware design of digital systems

    Energy Technology Data Exchange (ETDEWEB)

    Gruian, F.

    2000-02-01

    Power and energy consumption are important issues in many digital applications, for reasons such as packaging cost and battery life-span. With the development of portable computing and communication, an increasing number of research groups are addressing power and energy related issues at various stages during the design process. Most of the work done in this area focuses on lower abstraction levels, such as gate or transistor level. Ideally, a power and energy-efficient design flow should consider the power and energy issues at every stage in the design process. Therefore, power and energy aware methods, applicable early in the design process are required. In this trend, the thesis presents two high-level design methods addressing power and energy consumption minimization. The first of the two approaches we describe, targets power consumption minimization during behavioral synthesis. This is carried out by minimizing the switching activity, while taking the correlations between signals into account. The second approach performs energy consumption minimization during system-level design, by choosing the most energy-efficient schedule and configuration of resources. Both methods make use of the constraint programming paradigm to model the problems in an elegant manner. The experimental results presented in this thesis show the impact of addressing the power and energy related issues early in the design process.

  1. The Design and Application of the Digital Backpack

    Science.gov (United States)

    Basham, James D.; Meyer, Helen; Perry, Ernest

    2010-01-01

    In this study, we introduce the digital backpack as a means for creating a rich learning experience for students of multiple ages. Development, design, and refinement of the digital backpack are grounded in the theoretical framework of Universal Design for Learning using a Design-Based Research (DBR) model. This article presents the design and…

  2. Automatic design of digital synthetic gene circuits.

    Directory of Open Access Journals (Sweden)

    Mario A Marchisio

    2011-02-01

    Full Text Available De novo computational design of synthetic gene circuits that achieve well-defined target functions is a hard task. Existing, brute-force approaches run optimization algorithms on the structure and on the kinetic parameter values of the network. However, more direct rational methods for automatic circuit design are lacking. Focusing on digital synthetic gene circuits, we developed a methodology and a corresponding tool for in silico automatic design. For a given truth table that specifies a circuit's input-output relations, our algorithm generates and ranks several possible circuit schemes without the need for any optimization. Logic behavior is reproduced by the action of regulatory factors and chemicals on the promoters and on the ribosome binding sites of biological Boolean gates. Simulations of circuits with up to four inputs show a faithful and unequivocal truth table representation, even under parametric perturbations and stochastic noise. A comparison with already implemented circuits, in addition, reveals the potential for simpler designs with the same function. Therefore, we expect the method to help both in devising new circuits and in simplifying existing solutions.

  3. Automatic design of digital synthetic gene circuits.

    Science.gov (United States)

    Marchisio, Mario A; Stelling, Jörg

    2011-02-01

    De novo computational design of synthetic gene circuits that achieve well-defined target functions is a hard task. Existing, brute-force approaches run optimization algorithms on the structure and on the kinetic parameter values of the network. However, more direct rational methods for automatic circuit design are lacking. Focusing on digital synthetic gene circuits, we developed a methodology and a corresponding tool for in silico automatic design. For a given truth table that specifies a circuit's input-output relations, our algorithm generates and ranks several possible circuit schemes without the need for any optimization. Logic behavior is reproduced by the action of regulatory factors and chemicals on the promoters and on the ribosome binding sites of biological Boolean gates. Simulations of circuits with up to four inputs show a faithful and unequivocal truth table representation, even under parametric perturbations and stochastic noise. A comparison with already implemented circuits, in addition, reveals the potential for simpler designs with the same function. Therefore, we expect the method to help both in devising new circuits and in simplifying existing solutions.

  4. Pre-Service Teachers Designing and Constructing "Good Digital Games"

    Science.gov (United States)

    Artym, Corbett; Carbonaro, Mike; Boechler, Patricia

    2016-01-01

    There is a growing interest in the application of digital games to enhance learning across many educational levels. This paper investigates pre-service teachers' ability to operationalize the learning principles that are considered part of a good digital game (Gee, 2007) by designing digital games in Scratch. Forty pre-service teachers, enrolled…

  5. Sketchtube; integrating digital media in the education of design skills

    NARCIS (Netherlands)

    Mulder-Nijkamp, Maaike; Eggink, Wouter

    2013-01-01

    In this paper we discuss the application of new opportunities and chances of digital learning in design education by means of the implementation of a digital sketching forum into a sketching course. The so called ‘blended learning’ method combines face to face education and a digital forum called Sk

  6. Digital libraries philosophies, technical design considerations, and example scenarios

    CERN Document Server

    Stern, David

    1999-01-01

    An unparalleled overview of current design considerations for your digital library! Digital Libraries: Philosophies, Technical Design Considerations, and Example Scenarios is a balanced overview of public services, collection development, administration, and systems support, for digital libraries, with advice on adopting the latest technologies that appear on the scene. As a professional in the library and information science field, you will benefit from this special issue that serves as an overview of selected directions, trends, possibilities, limitations, enhancements, design principals, an

  7. Practical design of digital circuits basic logic to microprocessors

    CERN Document Server

    Kampel, Ian

    1983-01-01

    Practical Design of Digital Circuits: Basic Logic to Microprocessors demonstrates the practical aspects of digital circuit design. The intention is to give the reader sufficient confidence to embark upon his own design projects utilizing digital integrated circuits as soon as possible. The book is organized into three parts. Part 1 teaches the basic principles of practical design, and introduces the designer to his """"tools"""" - or rather, the range of devices that can be called upon. Part 2 shows the designer how to put these together into viable designs. It includes two detailed descriptio

  8. Design guidelines for SAR digital receiver/exciter boards.

    Energy Technology Data Exchange (ETDEWEB)

    Dudley, Peter A.

    2009-08-01

    High resolution radar systems generally require combining fast analog to digital converters and digital to analog converters with very high performance digital signal processing logic. These mixed analog and digital printed circuit boards present special challenges with respect to electromagnetic interference. This document first describes the mechanisms of interference on such boards then follows up with a discussion of prevention techniques and finally provides a checklist for designers to help avoid common mistakes.

  9. Design of Digital Control System for Cement Raw Material Preparation

    Institute of Scientific and Technical Information of China (English)

    ZHOU Ying; LI Hongsheng

    2006-01-01

    This paper describes the design of cement raw material prepared digital control system by PROFIBUS. It uses the digital technology to implement the digital control system for raw material prepared of the cement factory. This system improves the communication between the industrial system and locale instrument devices. It applies digital communication to replace the 4-20 mA or 24VDC signal between locale lever device and controller.

  10. Design of a multispectral digital colposcope

    Science.gov (United States)

    MacKinnon, N. B.; Cardeno, M.; Au, S.; MacAulay, C. E.; Pikkula, B. M.; Serachitopol, D.; Follen, M.; Park, S. Y.; Richards-Kortum, R.

    2007-02-01

    Measurement quality assurance plans for optical devices should be a mandatory part of grant funding submissions and should explicitly affect scoring during review. These should include calibration strategy, standards selection strategy, performance verification plan, performance validation plan and thorough preclinical performance validation. A multispectral digital colposcope (MDC) has been designed to collect image data from patients as part of an NIH sponsored clinical trial, based on a technology assessment model. Calibration strategy, standards selection and performance verification methods are presented that may be used as a template for smaller groups or more limited studies. With the MDC, red green and blue fluorescence images are captured under ultraviolet light excitation and red and green images are captured under blue light excitation. Red, green and blue reflectance images are captured under broadband white light illumination from a metal halide lamp in three modes - ordinary reflectance, and with polarized illumination in combination with parallel and cross-polarized filtered imaging. The highly automated system was designed to collect images of the cervix prior to and following the application of acetic acid. Three systems have been built and will be operated in clinics in Vancouver, Canada, Houston, Texas and other locations in the developed and developing world including Nigeria. The system is designed with a comprehensive set of calibration and performance verification standards, based on our experience with large scale multi-center spectroscopy clinical trials and measurements are made frequently prior to and following patient measurements. Automated performance verification procedures are being designed based on measurements made during pilot studies to facilitate larger clinical trials.

  11. Design Principles of Next-Generation Digital Gaming for Education.

    Science.gov (United States)

    Squire, Kurt; Jenkins, Henry; Holland, Walter; Miller, Heather; O'Driscoll, Alice; Tan, Katie Philip; Todd, Katie.

    2003-01-01

    Discusses the rapid growth of digital games, describes research at MIT that is exploring the potential of digital games for supporting learning, and offers hypotheses about the design of next-generation educational video and computer games. Highlights include simulations and games; and design principles, including context and using information to…

  12. 民航主题Hidden-Web爬虫的设计与实现%DESIGN AND IMPLEMENTATION OF CIVIL AVIATION-ORIENTED HIDDEN-WEB CRAWLER

    Institute of Scientific and Technical Information of China (English)

    张校慧; 徐彬; 陈国强; 陈珊

    2008-01-01

    分析了现今搜索引擎技术在民航主题Hidden-Web获取方面的缺陷,以此为鉴设计并实现了一个民航主题Hidden-Web爬虫.此爬虫使用主题分类等相关技术发现并抓取民航主题Hidden-Web所对应的前台Form,生成相应的Form库,然后利用启发式规则对Form库中的Form进行填写并搜集含有匹配结果的页面集.实验证明此爬虫的性能令人满意且对其它Hidden-Web的应用研究具有借鉴意义.

  13. Design of Digital Imaging System for Optimization of Control Parameters

    Institute of Scientific and Technical Information of China (English)

    SONG Yong; HAO Qun; YANG Guang; SUN Hong-wei

    2007-01-01

    The design of experimental system of digital imaging system for control parameter is discussed in detail. Signal processing of digital CCD imaging system is first analyzed. Then the real time control of CCD driver and digital processing circuit and man-machine interaction are achieved by the design of digital CCD imaging module and control module. Experimental results indicate that the image quality of CCD experimental system makes a good response to the change of control parameters. The system gives an important base for improving image quality and the applicability of micro imaging system in complex environment.

  14. Patient engagement and the design of digital health

    Science.gov (United States)

    Birnbaum, Faith; Lewis, Dana M.; Rosen, Rochelle; Ranney, Megan L.

    2015-01-01

    Digital health is an area of growing interest for physicians, patients, and technology companies alike. It promises the ability to engage patients in their care, before, during, and after an emergency department visit. Current efforts to create, study, and disseminate digital health have been limited by lack of user engagement. In this commentary, we outline the imperative for engaging end-users in each phase of digital health design, as well as a few techniques to facilitate better digital health design and implementation. PMID:25997375

  15. Innovative Principle and Method for Digital Jacquard Fabric Designing

    Institute of Scientific and Technical Information of China (English)

    ZHOU Jiu; NG Fran-kie; SZETO Y C; HUI C L

    2007-01-01

    Digital jacquard fabric has its design concept and method directly borrowed from computer images and color modes, which enabled creation of jacquard fabric design that is far beyond what freehand patterns can express. In this paper, the principles of digital jacquard fabric design were classified into two parts: colorless mode and colorful mode, and an innovative layered combination design method has been suggested contenting with this new design concept, by which digital jacquard fabric can be designed from colorless single-layer structure to colorful compound structure. As a result, designed colorless and colorful jacquard fabrics are capable of expressing picturesque and photo-realistic effects with a mega level color number on face of fabric. It is envisaged that the results of the study are of tremendous benefit to the creation of new jacquard fabric ith an inimitable digital effect and this creation pose no problem in mass production.

  16. Enzyme-Free Scalable DNA Digital Design Techniques: A Review.

    Science.gov (United States)

    Konampurath George, Aby; Singh, Harpreet

    2016-12-02

    With the recent developments in DNA nanotechnology, DNA has been used as the basic building block for the design of nanostructures, autonomous molecular motors, various devices, and circuits. DNA is considered as a possible candidate for replacing silicon for designing digital circuits in a near future, especially in implantable medical devices, because of its parallelism, computational powers, small size, light weight, and compatibility with bio-signals. The research in DNA digital design is in early stages of development, and electrical and computer engineers are not much attracted towards this field. In this paper, we give a brief review of the existing enzyme-free scalable DNA digital design techniques which are recently developed. With the developments in DNA circuits, it would be possible to design synthetic molecular systems, therapeutic molecular devices, and other molecular scale devices and instruments. The ultimate aim will be to build complex digital designs using DNA strands which may even be placed inside a human body.

  17. Intervention on digital printers: a graphic design method

    OpenAIRE

    Türkmen, Doruk; Turkmen, Doruk

    2014-01-01

    Print culture has become a mere representation of computer data. With practical solutions digital printing has brought, appreciation of printed matter and visual aesthetics lost their emphasis. While those practical solutions are useful, a lot of opportunities the digital printing could have offered were being missed out. This distant relationship between printed material and graphic design will be investigated in this thesis. In this experiment, opportunities that digital printing offers wil...

  18. Intervention on digital printers: a graphic design method

    OpenAIRE

    Türkmen, Doruk; Turkmen, Doruk

    2014-01-01

    Print culture has become a mere representation of computer data. With practical solutions digital printing has brought, appreciation of printed matter and visual aesthetics lost their emphasis. While those practical solutions are useful, a lot of opportunities the digital printing could have offered were being missed out. This distant relationship between printed material and graphic design will be investigated in this thesis. In this experiment, opportunities that digital printing offers wil...

  19. Research study on IPS digital controller design

    Science.gov (United States)

    Kuo, B. C.; Folkerts, C.

    1976-01-01

    The performance is investigated of the simplified continuous-data model of the Instrument Pointing System (IPS). Although the ultimate objective is to study the digital model of the system, knowledge on the performance of the continuous-data model is important in the sense that the characteristics of the digital system should approach those of the continuous-data system as the sampling period approaches zero.

  20. Designing a simple dynamic Digital Signage Network

    OpenAIRE

    Hagen, Andreas Ødegård

    2006-01-01

    Digital Signage Networks (DSN) is a continious emerging digital advertisment medium. Display devices, typically large format plasma or LCD screens, are used to provide rich multimedia advertisments in shops, buses, at airports and other public premises. Such networks have turned out to gain significant cost-effective advantages over traditional printed signage by eliminating the need for manual distribution. Animated graphics, audio and video effects makes a DSN highly suitable to attract the...

  1. Designing digital health information in a health literacy context

    NARCIS (Netherlands)

    Meppelink, C.S.

    2016-01-01

    Digital health information is widely available, but not everyone fully benefits due to limited health literacy. Until now, little was known about how health literacy influences information processing and how design features of digital health information can be used to create optimal health messages

  2. The multiplicity of the digital textbook as design object

    DEFF Research Database (Denmark)

    Riis Ebbesen, Toke

    2015-01-01

    Building on a preliminary case study of the Danish educational publisher Systime A/S and its flagship product, the web-based ‘iBog’/‘iBook’, this article explores how digital textbooks can be understood as design. The shaping of digital books is seen as being intertwined in a wider circuit of des...

  3. Designing digital health information in a health literacy context

    NARCIS (Netherlands)

    Meppelink, C.S.

    2016-01-01

    Digital health information is widely available, but not everyone fully benefits due to limited health literacy. Until now, little was known about how health literacy influences information processing and how design features of digital health information can be used to create optimal health messages

  4. Design theory of digital circuits at switch level

    Institute of Scientific and Technical Information of China (English)

    吴训威; F.Prosser

    1996-01-01

    By analysing problems in the traditional design theory of digital circuits it is proposed that both switching variable and signal variable should be adopted for describing the switching state of internal elements and signal in digital circuits respectively.Based on the above viewpoint the switch-signal theory is established.According to the working principle in CMOS circuits,the related design technique at switch level is developed.By using the practical design examples it is shown that the circuits designed at switch level have simpler structures than their counterparts designed at the traditional gate level since the switch transistors are used as construction units in designs.

  5. 75 FR 80853 - Designing a Digital Future: Federally Funded Research and Development in Networking and...

    Science.gov (United States)

    2010-12-23

    ... Designing a Digital Future: Federally Funded Research and Development in Networking and Information... ``Designing a Digital Future: Federally Funded Research and Development in Networking and Information... report entitled ``Designing a Digital Future: Federally Funded Research and Development in Networking and...

  6. Design of a novel digital phantom for EIT system calibration.

    Science.gov (United States)

    Li, Nan; Wang, Wei; Xu, Hui

    2011-01-01

    This paper presented the design method of a novel digital phantom for electrical impedance tomography system calibration. By current sensing, voltage generating circuitry and digital processing algorithms implemented in FPGA, the digital phantom can simulate different impedances of tissues. The hardware of the digital phantom mainly consists of current sensing section, voltage generating section, electrodes switching section and a FPGA. Concerning software, the CORDIC algorithm is implemented in the FPGA to realize direct digital synthesis (DDS) technique and related algorithms. Simulation results show that the suggested system exhibits sufficient accuracy in the frequency range 10 Hz to 2 MHz. With the advantages offered by digital techniques, our approach has the potential of speed, accuracy and flexibility of the EIT system calibration process.

  7. Physiologic aspects of designing hidden information systems based on visible optical radiation

    Directory of Open Access Journals (Sweden)

    Brailovskii V. V.

    2015-02-01

    Full Text Available The paper presents the methodology and experimental results of the study of human eye sensitivity in central and peripheral vision field to the visible light pulses. The experimental results show that transmission systems based on visible rays can work in hidden mode. Conditions providing hidden transmission differ significantly for day and night light levels. At low light levels (at night the non-perceptive nature of the pulsed light which is applied in the information transfer process should be used. In this case an optical transmitter is perceived as «usual» illuminant. In daylight, light pulse can be invisible at certain values of duration and frequency of the light pulses for central and peripheral vision. For example, light pulses with the duration of 5•10–6 s in the range from 20 to 200 Hz are «invisible».

  8. Digital integrated circuit design using Verilog and SystemVerilog

    CERN Document Server

    Mehler, Ronald W

    2014-01-01

    For those with a basic understanding of digital design, this book teaches the essential skills to design digital integrated circuits using Verilog and the relevant extensions of SystemVerilog. In addition to covering the syntax of Verilog and SystemVerilog, the author provides an appreciation of design challenges and solutions for producing working circuits. The book covers not only the syntax and limitations of HDL coding, but deals extensively with design problems such as partitioning and synchronization, helping you to produce designs that are not only logically correct, but will actually

  9. Semantics for Digital Engineering Archives Supporting Engineering Design Education

    OpenAIRE

    Regli, William C.; Drexel University; Kopena, Joseph B.; Drexel University; Grauer, Michael; Drexel University; Simpson, Timothy W.; Penn State University; Stone, Robert B.; Oregon State University; Lewis, Kemper; University at Buffalo - SUNY; Bohm, Matt R.; Oregon State University; Wilkie, David; Drexel University; Piecyk, Martin; Drexel University; Osecki, Jordan; Drexel University

    2010-01-01

    This article introduces the challenge of digital preservation in the area of engineering design and manufacturing and presents a methodology to apply knowledge representation and semantic techniques to develop Digital Engineering Archives. This work is part of an ongoing, multiuniversity, effort to create cyber infrastructure-based engineering repositories for undergraduates (CIBER-U) to support engineering design education. The technical approach is to use knowledge representation techniques...

  10. Foundations of Digital Methods : Query Design

    NARCIS (Netherlands)

    Rogers, R.; Schäfer, M.T.; van Es, K.

    2017-01-01

    Broadly speaking digital methods may be considered the deployment of online tools and data for the purposes of social and medium research. More speci cally, they derive from online methods, or methods of the medium, which are reimagined and repurposed for research. The methods to be repurposed are

  11. Designing Digital Game-Based Learning Environments

    Science.gov (United States)

    An, Yun-Jo; Bonk, Curtis J.

    2009-01-01

    With the emergence of the Web 2.0 and other technologies for learning, there are a variety of special places that did not exist previously in which to pursue learning. Not just a few dozen more but millions more. Many of these are not the physical learning spaces one might envision but entirely virtual or digital ones. As an example, the area of…

  12. Digital sonar design in underwater acoustics principles and applications

    CERN Document Server

    Li, Qihu

    2012-01-01

    "Digital Sonar Design in Underwater Acoustics Principles and Applications" provides comprehensive and up-to-date coverage of research on sonar design, including the basic theory and techniques of digital signal processing, basic concept of information theory, ocean acoustics, underwater acoustic signal propagation theory, and underwater signal processing theory. This book discusses the general design procedure and approaches to implementation, the design method, system simulation theory and techniques, sonar tests in the laboratory, lake and sea, and practical validation criteria and methods for digital sonar design. It is intended for researchers in the fields of underwater signal processing and sonar design, and also for navy officers and ocean explorers. Qihu Li is a professor at the Institute of Acoustics, Chinese Academy of Sciences, and an academician of the Chinese Academy of Sciences.

  13. On the Integration of Digital Design and Analysis Tools

    DEFF Research Database (Denmark)

    Klitgaard, Jens; Kirkegaard, Poul Henning

    The aim of this research is to look into integrated digital design and analysis tools in order to find out if it is suited for use by architects and designers or only by specialists and technicians - and if not, then to look at what can be done to make them more available to architects...... and designers....

  14. On the Integration of Digital Design and Analysis Tools

    DEFF Research Database (Denmark)

    Klitgaard, Jens; Kirkegaard, Poul Henning; Mullins, Michael

    2006-01-01

    the two types of tools. The paper therefore looks at integration of the two types in a prototype for a tool which allows aesthetics evaluation, and at the same time gives the architect instant technical feedback on ideas already in the initial sketching phase. The aim of the research is to look...... possible approaches for working with digital tectonics by means of acoustics: The architects, the architect-engineer or hybrid practitioner and finally a prototype for a possible digital tectonic tool. For the third approach in the case study a prototype digital tectonic tool is tested on the design......The digital design tools used by architects and engineers today are very useful with respect to their specific fields of aesthetical or technical evaluation. It is not yet possible to fully use the potential of the computer in the design process, as there is no well functioning interplay between...

  15. All-Digital ADC Design in 65 nm CMOS Technology

    OpenAIRE

    Pathapati, Srinivasa Rao

    2014-01-01

    The design of analog and complex mixed-signal circuits in a deep submicron CMOS process technology is a big challenge. This makes it desirable to shift data converter design towards the digital domain. The advantage of using a fully digital ADC design rather than a traditional analog ADC design is that the circuit is defined by an HDL description and automatically synthesized by tools. It offers low power consumption, low silicon area and a fully optimized gate-level circuit that reduces the ...

  16. The Design and Implementation of Parallel Digital Library Management System

    Directory of Open Access Journals (Sweden)

    Yang Yan

    2005-01-01

    Full Text Available As the number of documents in digital library grows, it becomes increasingly difficult to store, manage the large amount of documents and finding requested relevant documents by users. Parallel Digital Library management System (PDLS is used for this purpose. PDLS is a general tool for building and managing digital libraries of all kinds of documents to meet user needs. It implements system management and query processing in parallel. The functions of PDLS include data collection, format standardization, information extraction, automatic classification, data loading, data maintenance, query processing, external data entering, personalized recommendation etc. This study introduces the design and implementation of PDLS.

  17. Becoming a Digital Designer A Guide to Careers in Web, Video, Broadcast, Game and Animation Design

    CERN Document Server

    Heller, Steven

    2011-01-01

    From the author of the bestselling Becoming a Graphic Designer and the editor of Adobe Think Tank comes this clear overview of the field of digital design This complete guide to the evolving digital design disciplines opens the door to today's most sought-after job opportunities in Web, video, broadcast, game, and animation design. Featuring over 45 interviews with leading digital designers and more than 225 illustrations, the book covers everything from education and training, design specialties, and work settings to preparing an effective portfolio and finding a job. This is an ideal startin

  18. Integrated Digital Design Tool for Form Finding

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning

    2009-01-01

    Building design on one hand requires significant thought about structural, functional and cost-demands, while on the other hand it sometimes also has to fulfil the aesthetic demands from the architect or designer.......Building design on one hand requires significant thought about structural, functional and cost-demands, while on the other hand it sometimes also has to fulfil the aesthetic demands from the architect or designer....

  19. Protection implementation and design process of GOOSE based digital substation

    Energy Technology Data Exchange (ETDEWEB)

    Wang, S.; Wu, D.; Li, J.; Zhao, X. [Nari-relays, Jiangning, Nanjing, (China)

    2009-07-01

    IEC 61850 is a standard for the design of electrical substation automation. Generic object oriented substation events (GOOSE) is a control model mechanism in which any format of data is grouped into a data set and transmitted within a time period of 4 milliseconds. IEC 61850 and GOOSE opens the door for a lot of technical advantages in substation protection and control applications. This presentation discussed the protection implementation and design process of a GOOSE-based digital substation. Nari-Relays Electric Company's efforts related to IEC 61850 were first presented. GOOSE in protection and control application were then presented. A network structure of a digital substation was also illustrated. It was concluded that Nari-Relays' solution of digital substation design casted a light on the GOOSE-based substation design and that Nari-Relays' IEC 61850 products provide significant benefits to users. tabs., figs.

  20. Designing for Dialogue and Digitality in Higher and Continuing Education

    DEFF Research Database (Denmark)

    Sorensen, Elsebeth Korsgaard; Kjærgaard, Thomas

    2016-01-01

    design may be fruitful in highlighting and promoting the establishment and maintenance of a collaborative digital dialogue that is conducive to deep learning in digital CoPs unfolding in VLEs. Consequently, we suggest development of hybrid designs that synthesise the dialogical advantages of online......This study investigates and contrasts three scenarios of further education; presence lessons and two types of blended learning. It addresses the conceptual challenge of creating learning designs for online learning communities of practice (COPs) with a focus on 'collaborative digital dialogue......) and reflection. As a basis for exploring, identifying, assessing and discussing pertinent elements in pedagogic design of online learning in COPs, we apply as the analytical optic a framework of Critical Realism (CR). In exploring the notion ‘nexus of cognition' (NOC) and the emergence of an ‘open source...

  1. Design method for a digitally trimmable MOS transistor structure

    DEFF Research Database (Denmark)

    Ning, Feng; Bruun, Erik

    1996-01-01

    , a systematic design method for a digitally trimmable MOS transistor structure is proposed. Using the proposed method, we have designed a digitally trimmable MOS transistor structure and prototype devices were fabricated in a 2.4 micron n-well CMOS technology. Through measurements on these devices, the design...... method has been experimentally confirmed. The trimmable MOS transistor structure has been applied to a high precision current mirror to reduce mismatch in the current mirror. With the trimmable transistor structure, the mismatch can be reduced by more than one order of magnitude....

  2. Normalized Design of Multi-channel LIF Digital Receiver

    Institute of Scientific and Technical Information of China (English)

    方航锋; 郁发兴; 汪海航

    2004-01-01

    A design method for parallel processing application on multi-channel low-intermediate-frequency(LIF) digital receiver was presented. It is based on the DSP sub-array with a simple topology and operation timing to evaluate and determine the processing capability and then construct the parallel processing array for multi-channel signals according to the restriction of operation timing. Using this method, the design of multi-channel digital receiver may be simplified. Finally, a design example was used to show how to apply this method.

  3. Foundations of digital signal processing theory, algorithms and hardware design

    CERN Document Server

    Gaydecki, Patrick

    2005-01-01

    An excellent introductory text, this book covers the basic theoretical, algorithmic and real-time aspects of digital signal processing (DSP). Detailed information is provided on off-line, real-time and DSP programming and the reader is effortlessly guided through advanced topics such as DSP hardware design, FIR and IIR filter design and difference equation manipulation.

  4. Alexandria Digital Library: User Evaluation Studies and System Design.

    Science.gov (United States)

    Hill, Linda L.; Carver, Larry; Larsgaard, Mary; Dolin, Ron; Smith, Terence R.; Frew, James; Rae, Mary-Anna

    2000-01-01

    Describes the Alexandria Digital Library, a geolibrary that focuses on geographical locations. Topics include the evolution of the system and interface design; design goals; user communities, including earth scientists, information specialists, and educators; user evaluation methodologies and findings; and future possibilities. (LRW)

  5. Digital-Visual-Sensory-Design Anthropology: Ethnography, Imagination and Intervention

    Science.gov (United States)

    Pink, Sarah

    2014-01-01

    In this article I outline how a digital-visual-sensory approach to anthropological ethnography might participate in the making of relationship between design and anthropology. While design anthropology is itself coming of age, the potential of its relationship with applied visual anthropology methodology and theory has not been considered in the…

  6. Digital-Visual-Sensory-Design Anthropology: Ethnography, Imagination and Intervention

    Science.gov (United States)

    Pink, Sarah

    2014-01-01

    In this article I outline how a digital-visual-sensory approach to anthropological ethnography might participate in the making of relationship between design and anthropology. While design anthropology is itself coming of age, the potential of its relationship with applied visual anthropology methodology and theory has not been considered in the…

  7. Design Patterns for Digital Item Types in Higher Education

    Science.gov (United States)

    Draaijer, S.; Hartog, R. J. M.

    2007-01-01

    A set of design patterns for digital item types has been developed in response to challenges identified in various projects by teachers in higher education. The goal of the projects in question was to design and develop formative and summative tests, and to develop interactive learning material in the form of quizzes. The subject domains involved…

  8. Design Guidelines for Digital Learning Material for Food Chemistry Education.

    Science.gov (United States)

    Diederen, Julia; Gruppen, Harry; Voragen, Alphons G. J.; Hartog, Rob; Mulder, Martin; Biemans, Harm

    This paper describes the first stage of a 4-year research project on the design, development and use of Web-based digital learning material for food chemistry education. The paper discusses design guidelines, based on principles that were selected from theories on learning and instruction, and illustrates in detail how these guidelines were used…

  9. Digital design and verilog HDL fundamentals

    CERN Document Server

    Cavanagh, Joseph

    2011-01-01

    Comprehensive and self contained, this tutorial covers the design of a plethora of combinational and sequential logic circuits using conventional logic design and Verilog HDL. Number systems and number representations are presented along with various binary codes. Several advanced topics are covered, including functional decomposition and iterative networks. A variety of examples are provided for combinational and sequential logic, computer arithmetic, and advanced topics such as Hamming code error correction. Constructs supported by Verilog are described in detail. All designs are continued to completion. Each chapter includes numerous design issues of varying complexity to be resolved by the reader.

  10. InDesign CC digital classroom

    CERN Document Server

    Smith, Christopher

    2013-01-01

    Learn the newest version of Adobe's premiere page design software-InDesign CC- with this complete package Written by a team of expert instructors, this complete book-and-DVD package teaches even the most inexperienced beginner how to design eye-popping layouts for brochures, magazines, e-books, and flyers. Step-by-step instructions in the full-color book are enhanced by video tutorials on the companion DVD. Thirteen self-paced lessons let you learn Adobe InDesign CC (Creative Cloud) at your own speed; it's like having your own personal tutor teaching you the hottest new version of this leadi

  11. Design and Development of New Digital Thermostat

    Institute of Scientific and Technical Information of China (English)

    DAI Xun-jiang; CHAO Qin

    2008-01-01

    The designed thermostat is based on the microcontroller featuring intelligence, programmable, environmental protection and power saving. The thermostat design is mainly composed of hardware and software design, the hardware includes the power supply circuit, temperature measurement circuit, humidity measurement circuit and backlight circuit; while the software design includes temperature measurement and compensation algorithm, moreover software flowchart is given as well. Finally the power supply circuit is simulated by the software of Pspice and the creative power stealing mode is verified by the simulation results. A target board is stuffed by hand with Pb-free electronic components and used to test hardware and debug software. Since the Pb-free components were used, power stealing mode is designed in hardware and temperature compensation algorithm is accomplished in software, and the thermostat is outstanding with its features of "green" and "power saving".

  12. Designing Digital Preservation Solutions: A Risk Management-Based Approach

    Directory of Open Access Journals (Sweden)

    José Barateiro

    2010-07-01

    Full Text Available Digital preservation aims to keep digital objects accessible over long periods of time, ensuring the authenticity and integrity of these digital objects. In such complex environments, Risk Management is a key factor in assuring the normal behaviour of systems over time. Currently, the digital preservation arena commonly uses Risk Management concepts to assess repositories. In this paper, we intend to go further and propose a perspective where Risk Management can be used not only to assess existing solutions, but also to conceive digital preservation environments. Thus, we propose a Risk Management-based approach to design and assess digital preservation environments, including:• the definition of context and identification of strategic objectives to determine specific requirements and characterize which consequences are acceptable within the identified context;• the identification, analysis and evaluation of threats and vulnerabilities that may affect the normal behaviour of a specific business or the achievement of the goals and conformance to the requirements identified in the context characterization; and, • definition of actions to deal with the risks associated with the identified threats and vulnerabilities.We generalize and survey the main requirements, threats, vulnerabilities and techniques that can be applied in the scope of digital preservation.

  13. 1st international conference on digital enterprise design and management

    CERN Document Server

    Krob, Daniel; Rowe, Frantz

    2013-01-01

    This book contains all refereed papers that were accepted to the first edition of the « Digital Enterprise Design & Management » (DED&M 2013) international conference that took place in Paris (France) from February 12 to February 13, 2013. (Website: http://www.dedm2013.dedm.fr/) These proceedings cover the most recent trends in the emerging field of Digital Enterprise, both from an academic and a professional perspective. A special focus is put on digital uses, digital strategies, digital infrastructures and digital governance from an Enterprise Architecture point of view. The DED&M 2013 conference is organized under the guidance of the CESAMES non profit organization (http://www.cesames.net/). and benefits from the support of the "Innovation and Regulation of Digital Services" Chair (Orange, Ecole Polytechnique and Telecom ParisTech) and of the "Complex Systems Engineering" Chair (Dassault Aviation - DCNS - DGA - Thales - Ecole Polytechnique - ENSTA ParisTech – Telecom ParisTech).

  14. Analog Design for Digital Deployment of a Serious Leadership Game

    Science.gov (United States)

    Maxwell, Nicholas; Lang, Tristan; Herman, Jeffrey L.; Phares, Richard

    2012-01-01

    This paper presents the design, development, and user testing of a leadership development simulation. The authors share lessons learned from using a design process for a board game to allow for quick and inexpensive revision cycles during the development of a serious leadership development game. The goal of this leadership simulation is to accelerate the development of leadership capacity in high-potential mid-level managers (GS-15 level) in a federal government agency. Simulation design included a mixed-method needs analysis, using both quantitative and qualitative approaches to determine organizational leadership needs. Eight design iterations were conducted, including three user testing phases. Three re-design iterations followed initial development, enabling game testing as part of comprehensive instructional events. Subsequent design, development and testing processes targeted digital application to a computer- and tablet-based environment. Recommendations include pros and cons of development and learner testing of an initial analog simulation prior to full digital simulation development.

  15. A digital patient for computer-aided prosthesis design

    OpenAIRE

    Colombo, Giorgio; Facoetti, Giancarlo; Rizzi, Caterina

    2013-01-01

    This article concerns the design of lower limb prosthesis, both below and above knee. It describes a new computer-based design framework and a digital model of the patient around which the prosthesis is designed and tested in a completely virtual environment. The virtual model of the patient is the backbone of the whole system, and it is based on a biomechanical general-purpose model customized with the patient's characteristics (e.g. anthropometric measures). The software platform adopts com...

  16. Design of All Digital Flight Program Training Desktop Application System

    Directory of Open Access Journals (Sweden)

    Li Yu

    2017-01-01

    Full Text Available All digital flight program training desktop application system operating conditions are simple. Can make the aircraft aircrew learning theory and operation training closely. Improve the training efficiency and effectiveness. This paper studies the application field and design requirements of flight program training system. Based on the WINDOWS operating system desktop application, the design idea and system architecture of the all digital flight program training system are put forward. Flight characteristics, key airborne systems and aircraft cockpit are simulated. Finally, By comparing flight training simulator and the specific script program training system, The characteristics and advantages of the training system are analyzed in this paper.

  17. Universal optimality of digital nets and lattice designs

    Institute of Scientific and Technical Information of China (English)

    HICKERNELL; Fred; J

    2009-01-01

    This article considers universal optimality of digital nets and lattice designs in a regression model. Based on the equivalence theorem for matrix means and majorization theory,the necessary and sufficient conditions for lattice designs being φp-and universally optimal in trigonometric function and Chebyshev polynomial regression models are obtained. It is shown that digital nets are universally optimal for both complete and incomplete Walsh function regression models under some specified conditions,and are also universally optimal for complete Haar wavelet regression models but may not for incomplete Haar wavelet regression models.

  18. Universal optimality of digital nets and lattice designs

    Institute of Scientific and Technical Information of China (English)

    AI MingYao; HICKERNELL Fred J

    2009-01-01

    This article considers universal optimality of digital nets and lattice designs in a regression model. Based on the equivalence theorem for matrix means and majorization theory, the necessary and sufficient conditions for lattice designs being φ_p- and universally optimal in trigonometric function and Chebyshev polynomial regression models are obtained. It is shown that digital nets are universally optimal for both complete and incomplete Walsh function regression models under some specified conditions, and are also universally optimal for complete Haar wavelet regression models but may not for incomplete Haar wavelet regression models.

  19. Travellers: Design Collaboration and Digital Media

    Institute of Scientific and Technical Information of China (English)

    J. Bahoric; P. Nicholas; G. Ormston

    2008-01-01

    This paper examines the use of 3D electronic medium as a tool for procuring detailed design in-formation for the Sandridge Bridge Travellers project. The Sandridge Bridge Travellers project required the production of 10 7.5 m of tall x 5 - 12 m of wide figures under very tight programme and budget constraints.This was achieved through a synthesis of art and engineering, whereby structure and sculpture become one and the same. Traditional procurement routes would have entailed the production and interpretation of draw-ings and design details at all discipline interfaces before fabrication; an approach that was unfeasible given the constraints. Instead, The Travellers project saw a single electronic file pass backwards and forwards from client to architect, engineer, and fabricator, with information from the initial artistic concept work phases through to analysis, design, member scheduling and fabrication all integrated and facilitated by a single electronic medium. Key to the delivery was the use of 3D modeling and scripting programs that enabled the efficient use and development of design information through all stages of the design process. This enabled total integration of all trades requiring a collaborative approach where each party maintained joint ownership of the 3D design information from inception to conception.

  20. Development and applications of an interactive digital filter design program.

    Science.gov (United States)

    Woo, H W; Kim, Y M; Tompkins, W J

    1985-10-01

    We have implemented an interactive digital filter design program in the HP 1000 computer at the Department of Electrical Engineering of the University of Washington. This program allows users to design different types of filters interactively with both amplitude and phase responses displayed on graphic devices. The performance of each designed filter can be evaluated conveniently before the best one is chosen and implemented for any particular application. This program can design recursive filters, e.g. Butterworth, Chebyshev and elliptic, or nonrecursive filters with one out of six different windows, i.e. rectangular, triangular, Hann, Hamming, Blackman and Kaiser. The main outputs from this program are coefficients of a transfer function of an analog filter, a digital filter, or both. Therefore, the design of both analog and digital filters is facilitated by using this program. The program is very simple to use and does not require background in analog or digital filter principles in order to run it. The program is written in standard FORTRAN and is about 30 kbytes in size excluding the graphics display routines. Since it uses standard FORTRAN, it can be easily transported to minicomputer and microcomputer systems that have a FORTRAN compiler and minimal graphics capabilities. This program is available for distribution to interested institutions and laboratories.

  1. 2nd International Conference on Digital Enterprise Design and Management

    CERN Document Server

    Krob, Daniel; Lonjon, Antoine; Panetto, Hervé

    2014-01-01

    This book contains all refereed papers that were accepted to the second edition of the « Digital Enterprise Design & Management » (DED&M 2014) international conference that took place in Paris (France) from February 4 to February 5, 2014 . These proceedings cover the most recent trends in the emerging field of Digital Enterprise, both from an academic and a professional perspective. A special focus is put on digital uses, digital strategies, digital infrastructures and digital governance from an Enterprise Architecture point of view. The DED&M 2014 conference is organized under the guidance of the Center of Excellence on Systems Architecture, Management, Economy and Strategy  and benefits from the supports of both the Orange – Ecole Polytechnique – Télécom ParisTech “Innovation and Regulation” Chair and the Dassault Aviation – DCNS – DGA – Thales – Ecole Polytechnique – ENSTA ParisTech – Télécom ParisTech  “Complex Systems Engineering” Chair.  .

  2. Design of Digital Adder Using Reversible Logic

    Directory of Open Access Journals (Sweden)

    Gowthami P

    2016-02-01

    Full Text Available Reversible logic circuits have promising applications in Quantum computing, Low power VLSI design, Nanotechnology, optical computing, DNA computing and Quantum dot cellular automata. In spite of them another main prominent application of reversible logic is Quantum computers where the quantum devices are essential which are ideally operated at ultra high speed with less power dissipation must be built from reversible logic components. This makes the reversible logic as a one of the most promising research areas in the past few decades. In VLSI design the delay is the one of the major issue along with area and power. This paper presents the implementation of Ripple Carry Adder (RCA circuits using reversible logic gates are discussed.

  3. Progress in multirate digital control system design

    Science.gov (United States)

    Berg, Martin C.; Mason, Gregory S.

    1991-01-01

    A new methodology for multirate sampled-data control design based on a new generalized control law structure, two new parameter-optimization-based control law synthesis methods, and a new singular-value-based robustness analysis method are described. The control law structure can represent multirate sampled-data control laws of arbitrary structure and dynamic order, with arbitrarily prescribed sampling rates for all sensors and update rates for all processor states and actuators. The two control law synthesis methods employ numerical optimization to determine values for the control law parameters. The robustness analysis method is based on the multivariable Nyquist criterion applied to the loop transfer function for the sampling period equal to the period of repetition of the system's complete sampling/update schedule. The complete methodology is demonstrated by application to the design of a combination yaw damper and modal suppression system for a commercial aircraft.

  4. The design of multirate digital control systems

    Science.gov (United States)

    Berg, M. C.

    1986-01-01

    The successive loop closures synthesis method is the only method for multirate (MR) synthesis in common use. A new method for MR synthesis is introduced which requires a gradient-search solution to a constrained optimization problem. Some advantages of this method are that the control laws for all control loops are synthesized simultaneously, taking full advantage of all cross-coupling effects, and that simple, low-order compensator structures are easily accomodated. The algorithm and associated computer program for solving the constrained optimization problem are described. The successive loop closures , optimal control, and constrained optimization synthesis methods are applied to two example design problems. A series of compensator pairs are synthesized for each example problem. The succesive loop closure, optimal control, and constrained optimization synthesis methods are compared, in the context of the two design problems.

  5. Transceiver and system design for digital communications

    CERN Document Server

    Bullock, Scott R

    2014-01-01

    This is the fourth edition of this successful professional reference book on transceiver design, the device that both sends and receives signals, and its place within the wireless communication system. It gives engineers and others a good intuitive understanding of wireless systems and spread spectrum. New topics covered include cognitive radio, systems, networks, and commercial communications. In addition, many items have been extensively updated to improve the flow of the book and enhance comprehension.

  6. Design and performance analysis of digital acoustic underwater telemetry system

    Science.gov (United States)

    Catipovic, J. A.; Baggeroer, A. B.; Vonderheydt, K.; Koelsch, D. E.

    1985-11-01

    The work discusses the design and performance characteristics of a Digital Acoustic Telemetry System (DATS) which incorporates the current state-of-the-art technology and is capable of reliable data transmission at rates useful to a wide range of ocean exploration and development gear.

  7. Usability Studies and User-Centered Design in Digital Libraries

    Science.gov (United States)

    Comeaux, David J.

    2008-01-01

    Digital libraries continue to flourish. At the same time, the principles of user-centered design and the practice of usability testing have been growing in popularity, spreading their influence into the library sphere. This article explores the confluence of these two trends by surveying the current literature on usability studies of digital…

  8. Designing Digital Problem Based Learning Tasks that Motivate Students

    Science.gov (United States)

    van Loon, Anne-Marieke; Ros, Anje; Martens, Rob

    2013-01-01

    This study examines whether teachers are able to apply the principles of autonomy support and structure support in designing digital problem based learning (PBL) tasks. We examine whether these tasks are more autonomy- and structure-supportive and whether primary and secondary school students experience greater autonomy, competence, and motivation…

  9. A flight test facility design for examining digital information transfer

    Science.gov (United States)

    Knox, Charles E.

    1990-01-01

    Information is given in viewgraph form on a flight test facility design for examining digital information transfer. Information is given on aircraft/ground exchange, data link research activities, data link display format, a data link flight test, and the flight test setup.

  10. Usability Studies and User-Centered Design in Digital Libraries

    Science.gov (United States)

    Comeaux, David J.

    2008-01-01

    Digital libraries continue to flourish. At the same time, the principles of user-centered design and the practice of usability testing have been growing in popularity, spreading their influence into the library sphere. This article explores the confluence of these two trends by surveying the current literature on usability studies of digital…

  11. Designing Digital Problem Based Learning Tasks that Motivate Students

    Science.gov (United States)

    van Loon, Anne-Marieke; Ros, Anje; Martens, Rob

    2013-01-01

    This study examines whether teachers are able to apply the principles of autonomy support and structure support in designing digital problem based learning (PBL) tasks. We examine whether these tasks are more autonomy- and structure-supportive and whether primary and secondary school students experience greater autonomy, competence, and motivation…

  12. Designing for Dialogue and Digitality in Higher and Continuing Education

    DEFF Research Database (Denmark)

    Sorensen, Elsebeth Korsgaard; Kjærgaard, Thomas

    2016-01-01

    This study investigates and contrasts three scenarios of further education; presence lessons and two types of blended learning. It addresses the conceptual challenge of creating learning designs for online learning communities of practice (COPs) with a focus on 'collaborative digital dialogue...

  13. A Learning Design for Student-Generated Digital Storytelling

    Science.gov (United States)

    Kearney, Matthew

    2011-01-01

    The literature on digital video in education emphasises the use of pre-fabricated, instructional-style video assets. Learning designs for supporting the use of these expert-generated video products have been developed. However, there has been a paucity of pedagogical frameworks for facilitating specific genres of learner-generated video projects.…

  14. A Learning Design for Student-Generated Digital Storytelling

    Science.gov (United States)

    Kearney, Matthew

    2011-01-01

    The literature on digital video in education emphasises the use of pre-fabricated, instructional-style video assets. Learning designs for supporting the use of these expert-generated video products have been developed. However, there has been a paucity of pedagogical frameworks for facilitating specific genres of learner-generated video projects.…

  15. Chip-Level Design for Digital Microfluidic Biochips

    Directory of Open Access Journals (Sweden)

    Shang Tsung Yu

    2014-11-01

    Full Text Available Recently, electrowetting-on-dielectric (EWOD chips have become the most popular actuator for droplet-based digital microfluidic biochips (DMFBs due to its high throughput, automatic control, and low cost. As the complexity of biochemical assays increases, powerful computer-aided-design (CAD tools are needed. This paper provides an overview of DMFBs and describes some important issues and problems in the chip-level design of DMFBs.

  16. Multivariable robust digital controller design by convex optimization

    OpenAIRE

    2004-01-01

    The dissertation is essentially concerned with methods of robust digital multivariable and monovariable controller design. For controller desing, a linear discrete-time model of plant to be controlled is used. The controller robustness is treated by sensitivity frequency analysis(sensitivity is transfer function/matrix of closed loop). Correspondingly to H∞ design, the singular values of frequency responses are used for the analysis.The work is divided into five parts. The first part concerns...

  17. The Photoshop Smile Design technique (part 1): digital dental photography.

    Science.gov (United States)

    McLaren, Edward A; Garber, David A; Figueira, Johan

    2013-01-01

    The proliferation of digital photography and imaging devices is enhancing clinicians' ability to visually document patients' intraoral conditions. By understanding the elements of esthetics and learning how to incorporate technology applications into clinical dentistry, clinicians can predictably plan smile design and communicate anticipated results to patients and ceramists alike. This article discusses camera, lens, and flash selection and setup, and how to execute specific types of images using the Adobe Photoshop Smile Design (PSD) technique.

  18. Algorithm for Design of Digital Notch Filter Using Simulation

    Directory of Open Access Journals (Sweden)

    Amit Verma

    2013-08-01

    Full Text Available A smooth waveform is generated of low frequency signal can be achieved through the Digital Notch Filter. Noise can be easily eliminated from a speech signal by using a Notch filter. In this paper the design of notch filter using MATLAB has been designed and implemented. The performance and characteristics of the filter has been shown in the waveform in the conclusion part of the paper.

  19. Comparison of Designer's Design Thinking Modes in Digital and Traditional Sketches

    Science.gov (United States)

    Wu, Jun-Chieh; Chen, Cheng-Chi; Chen, Hsin-Chia

    2012-01-01

    The internal design thinking behaviour of designers in the concept development has been an important issue of cognitive psychology. In this study, the design thinking process designers have in applying digital media and traditional paper in the early concept development stage was explored. Special focus was made on the structure and procedure of…

  20. Design of an agricultural economic statistical digitalized system

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    To improve the efficiency of the management of large farms, a digitalized system of economic statistics is designed based on the Internet platform of the digitalized agricultural integrated system of Friendship Farm, the largest farm in the world. The system can also realize data storage by using the access databank technology. A dynamic website system, based on ASP technology, is used to implement the on-line inquiry of the statistical index of the agricultural economy and the diagrams of the index every y...

  1. Design of the digitizing beam position limit detector.

    Energy Technology Data Exchange (ETDEWEB)

    Merl, R.

    1998-05-27

    The Digitizing Beam Position Limit Detector (DBPLD) is designed to identify and react to beam missteering conditions in the Advanced Photon Source (APS) storage ring. The high power of the insertion devices requires these missteering conditions to result in a beam abort in less than 2 milliseconds. Commercially available beam position monitors provide a voltage proportional to beam position immediately upstream and downstream of insertion devices. The DBPLD is a custom VME board that digitizes these voltages and interrupts the heartbeat of the APS machine protection system when the beam position exceeds its trip limits.

  2. Digital system design and application with VHDL and FPGA

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Gang; Jo, Yun Seok

    2002-09-15

    Contents of this book are digital system design modeling using VHDL like VHDL basics, writing VHDL for synthesis and VHDL environments, combinational logic design such as 4bit full adder and parallel combinational BCD multiplier sequential logic design, including Johnson counter, stop-watch, Dice game, traffic light controller, elevator controller and alarm clock, complex applications design like dynamic input/output circuit, PS/2 keyboard, LCD, VGA and UART. It also has a supplement about free license for ModelSim and Guide for 3100 X board user.

  3. Tunable photonic filters: a digital signal processing design approach.

    Science.gov (United States)

    Binh, Le Nguyen

    2009-05-20

    Digital signal processing techniques are used for synthesizing tunable optical filters with variable bandwidth and centered reference frequency including the tunability of the low-pass, high-pass, bandpass, and bandstop optical filters. Potential applications of such filters are discussed, and the design techniques and properties of recursive digital filters are outlined. The basic filter structures, namely, the first-order all-pole optical filter (FOAPOF) and the first-order all-zero optical filter (FOAZOF), are described, and finally the design process of tunable optical filters and the designs of the second-order Butterworth low-pass, high-pass, bandpass, and bandstop tunable optical filters are presented. Indeed, we identify that the all-zero and all-pole networks are equivalent with well known principles of optics of interference and resonance, respectively. It is thus very straightforward to implement tunable optical filters, which is a unique feature.

  4. A New Design Methodology for Composing Complex Digital Systems

    Directory of Open Access Journals (Sweden)

    S.L. Chu

    2013-04-01

    Full Text Available Continuous growth in the use of multimedia applications on portable devices makes the mobile computer systems have an increasing complexity. The functionalities of the used SOC chips and silicon intelligent properties in these portable devices are become complicated and hard to design. Traditional digital circuit designs adopt register transfer level with timing control methodologies, which focus on the datapath composition, timing control of registers, and the functions of combinational circuits. However, the huge amount of control and synchronous signals of the above components are difficult to design and debug. The timing costs of design and verification are increased dramatically. This paper proposed a new design methodology of digital system, called data-oriented methodology, to deal with the above problems, by using Bluespec SystemVerilog HDL and the corresponding tools. Instead of conventional timing-control mechanism, the data-oriented methodology adopts simple handshaking protocol, blocking transferring, and explicitly register/FIFO declaration for communicating between adjacent modules. The designs of FDCT/IDCT and pipelined MIPS-like CPU are adopted to compare the design costs of conventional timing-control and data-oriented methodologies. The chip performance and FPGA proven of these two designs are discussed

  5. A New Design Methodology for Composing Complex Digital Systems

    Directory of Open Access Journals (Sweden)

    S. L. Chu

    2013-03-01

    Full Text Available Continuous growth in the use of multimedia applications on portable devices makes the mobile computer systemshave an increasing complexity. The functionalities of the used SOC chips and silicon intelligent properties in theseportable devices are become complicated and hard to design. Traditional digital circuit designs adopt register transferlevel with timing control methodologies, which focus on the datapath composition, timing control of registers, and thefunctions of combinational circuits. However, the huge amount of control and synchronous signals of the abovecomponents are difficult to design and debug. The timing costs of design and verification are increased dramatically.This paper proposed a new design methodology of digital system, called data-oriented methodology, to deal with theabove problems, by using Bluespec SystemVerilog HDL and the corresponding tools. Instead of conventional timingcontrolmechanism, the data-oriented methodology adopts simple handshaking protocol, blocking transferring, andexplicitly register/FIFO declaration for communicating between adjacent modules. The designs of FDCT/IDCT andpipelined MIPS-like CPU are adopted to compare the design costs of conventional timing-control and data-orientedmethodologies. The chip performance and FPGA proven of these two designs are discussed

  6. 潜藏于现代设计中的未来主义%Futurism Hidden in Modern Design

    Institute of Scientific and Technical Information of China (English)

    吕秋琼

    2014-01-01

    未来主义艺术思潮衰落于20世纪20年代,加上两次世界大战导致艺术家大批量丧生,它受到重创。然而,未来主义所倡导的理念和元素,至今仍出现在生活的各领域中,这些身影并非历史的遗迹,而是未来主义被引用及进化的结果。%Futurism as a movement in art began to decline from the 1920s .Many artists of futurism were killed in two world wars ,and now futurism has basically disappeared .However ,some elements advocated by futurism are still an important part of Western culture .They qui-etly have hidden in the design of modern life .These are not the relic of history ,but the results of the design elements that was referenced and continuously evolving .

  7. The Hidden Dangers in during the Utilization of Digital Resources and Countermeasures%数字资源利用期间的安全隐患与对策

    Institute of Scientific and Technical Information of China (English)

    金蕊

    2014-01-01

    The digitalization is a main trend of library’s reform, and digital technology aided processing library’s internal resources can reduce the difficulty of the manual operation process, and improve comprehensively the utilization of digital resources. At the same time, the hidden danger in computer network itself leads to the existence of different safety risks in digital resources utilization, increasing the control difficulty of new library construction. This paper analyzes the structural features of digital library, sums up the hidden dangers existing in the utilization of digital materials, and puts forward some effective countermeasures for constructing the safe utilization mechanism for digital resources.%数字化是图书馆改革的主要趋势,利用数字技术辅助图书馆内部资源处理,可以降低人工操作流程的难度,全面提升数字资源的利用率。同时,计算机网络自身存在的安全隐患,导致了数字资源利用存在着不同的安全风险,增加了新型图书馆建设的操控难度。分析了数字图书馆的结构特点,总结了数字资料利用中存在的隐患,提出了构建数字资源安全利用机制的有效对策。

  8. In search of design principles for developing digital learning & performance support for a student design task

    NARCIS (Netherlands)

    Bollen, Lars; Van der Meij, Hans; Leemkuil, Henny; McKenney, Susan

    2016-01-01

    A digital learning and performance support environment for university student design tasks was developed. This paper describes on the design rationale, process, and the usage results to arrive at a core set of design principles for the construction of such an environment. We present a collection of

  9. In search of design principles for developing digital learning & performance support for a student design task

    NARCIS (Netherlands)

    Bollen, Lars; Meij, van der Hans; Leemkuil, Henny; McKenney, Susan

    2015-01-01

    A digital learning and performance support environment for university student design tasks was developed. This paper describes on the design rationale, process, and the usage results to arrive at a core set of design principles for the construction of such an environment. We present a collection of

  10. In search of design principles for developing digital learning & performance support for a student design task

    NARCIS (Netherlands)

    Bollen, Lars; Van der Meij, Hans; Leemkuil, Henny; McKenney, Susan

    2016-01-01

    A digital learning and performance support environment for university student design tasks was developed. This paper describes on the design rationale, process, and the usage results to arrive at a core set of design principles for the construction of such an environment. We present a collection of

  11. In search of design principles for developing digital learning & performance support for a student design task

    NARCIS (Netherlands)

    Bollen, Lars; van der Meij, Hans; Leemkuil, Hendrik H.; McKenney-Jensh, Susan E.

    2015-01-01

    A digital learning and performance support environment for university student design tasks was developed. This paper describes on the design rationale, process, and the usage results to arrive at a core set of design principles for the construction of such an environment. We present a collection of

  12. Computer-aided design of digital radio devices with frequency representation of information

    OpenAIRE

    Kychak, Vasyl; Kychak, Volodymyr

    2012-01-01

    This paper presents a system of automated design of digital radio devices with frequency representation of information, which can significantly simplify the design process of digital devices with large number of input signals.

  13. Digital logic design using verilog coding and RTL synthesis

    CERN Document Server

    Taraate, Vaibbhav

    2016-01-01

    This book is designed to serve as a hands-on professional reference with additional utility as a textbook for upper undergraduate and some graduate courses in digital logic design. This book is organized in such a way that that it can describe a number of RTL design scenarios, from simple to complex. The book constructs the logic design story from the fundamentals of logic design to advanced RTL design concepts. Keeping in view the importance of miniaturization today, the book gives practical information on the issues with ASIC RTL design and how to overcome these concerns. It clearly explains how to write an efficient RTL code and how to improve design performance. The book also describes advanced RTL design concepts such as low-power design, multiple clock-domain design, and SOC-based design. The practical orientation of the book makes it ideal for training programs for practicing design engineers and for short-term vocational programs. The contents of the book will also make it a useful read for students a...

  14. Designing Estimator/Predictor Digital Phase-Locked Loops

    Science.gov (United States)

    Statman, J. I.; Hurd, W. J.

    1988-01-01

    Signal delays in equipment compensated automatically. New approach to design of digital phase-locked loop (DPLL) incorporates concepts from estimation theory and involves decomposition of closed-loop transfer function into estimator and predictor. Estimator provides recursive estimates of phase, frequency, and higher order derivatives of phase with respect to time, while predictor compensates for delay, called "transport lag," caused by PLL equipment and by DPLL computations.

  15. Design of a digital adaptive control system for reentry vehicles.

    Science.gov (United States)

    Picon-Jimenez, J. L.; Montgomery, R. C.; Grigsby, L. L.

    1972-01-01

    The flying qualities of atmospheric reentry vehicles experience considerable variations due to the wide changes in flight conditions characteristic of reentry trajectories. A digital adaptive control system has been designed to modify the vehicle's dynamic characteristics and to provide desired flying qualities for all flight conditions. This adaptive control system consists of a finite-memory identifier which determines the vehicle's unknown parameters, and a gain computer which calculates feedback gains to satisfy flying quality requirements.

  16. Beyond consensus: statistical free energies reveal hidden interactions in the design of a TPR motif.

    Science.gov (United States)

    Magliery, Thomas J; Regan, Lynne

    2004-10-22

    Consensus design methods have been used successfully to engineer proteins with a particular fold, and moreover to engineer thermostable exemplars of particular folds. Here, we consider how a statistical free energy approach can expand upon current methods of phylogenetic design. As an example, we have analyzed the tetratricopeptide repeat (TPR) motif, using multiple sequence alignment to identify the significance of each position in the TPR. The results provide information above and beyond that revealed by consensus design alone, especially at poorly conserved positions. A particularly striking finding is that certain residues, which TPR-peptide co-crystal structures show are in direct contact with the ligand, display a marked hypervariability. This suggests a novel means of identifying ligand-binding sites, and also implies that TPRs generally function as ligand-binding domains. Using perturbation analysis (or statistical coupling analysis), we examined site-site interactions within the TPR motif. Correlated occurrences of amino acid residues at poorly conserved positions explain how TPRs achieve their near-neutral surface charge distributions, and why a TPR designed from straight consensus has an unusually high net charge. Networks of interacting sites revealed that TPRs fall into two unrecognized families with distinct sets of interactions related to the identity of position 7 (Leu or Lys/Arg). Statistical free energy analysis provides a more complete description of "What makes a TPR a TPR?" than consensus alone, and it suggests general approaches to extend and improve the phylogenetic design of proteins.

  17. Design and implementation of digital airborne multispectral camera system

    Science.gov (United States)

    Lin, Zhaorong; Zhang, Xuguo; Wang, Li; Pan, Deai

    2012-10-01

    The multispectral imaging equipment is a kind of new generation remote sensor, which can obtain the target image and the spectra information simultaneously. A digital airborne multispectral camera system using discrete filter method had been designed and implemented for unmanned aerial vehicle (UAV) and manned aircraft platforms. The digital airborne multispectral camera system has the advantages of larger frame, higher resolution, panchromatic and multispectral imaging. It also has great potential applications in the fields of environmental and agricultural monitoring and target detection and discrimination. In order to enhance the measurement precision and accuracy of position and orientation, Inertial Measurement Unit (IMU) is integrated in the digital airborne multispectral camera. Meanwhile, the Temperature Control Unit (TCU) guarantees that the camera can operate in the normal state in different altitudes to avoid the window fogging and frosting which will degrade the imaging quality greatly. Finally, Flying experiments were conducted to demonstrate the functionality and performance of the digital airborne multispectral camera. The resolution capability, positioning accuracy and classification and recognition ability were validated.

  18. An Analytic Creativity Assessment Scale for Digital Game Story Design: Construct Validity, Internal Consistency and Interrater Reliability

    Science.gov (United States)

    Chuang, Tsung-Yen; Huang, Yun-Hsuan

    2015-01-01

    Mobile technology has rapidly made digital games a popular entertainment to this digital generation, and thus digital game design received considerable attention in both the game industry and design education. Digital game design involves diverse dimensions in which digital game story design (DGSD) particularly attracts our interest, as the…

  19. Beautiful Architecture Leading Thinkers Reveal The Hidden Beauty In Software Design

    CERN Document Server

    Spinellis, Diomidis

    2009-01-01

    What are the ingredients of robust, elegant, flexible, and maintainable software architecture? Beautiful Architecture answers this question through a collection of intriguing essays from more than a dozen of today's leading software designers and architects. In each essay, contributors present a notable software architecture, and analyze what makes it innovative and ideal for its purpose.

  20. Finding hidden treasure: a 28-year case study for optimizing experimental designs

    Science.gov (United States)

    Field-based agronomic and genetic research is a decision-based process. Many decisions are required to design, conduct, analyze, and complete any field experiment. While these decisions are critical to the success of any research program, their importance is magnified for research on perennial crops...

  1. Modern digital flight control system design for VTOL aircraft

    Science.gov (United States)

    Broussard, J. R.; Berry, P. W.; Stengel, R. F.

    1979-01-01

    Methods for and results from the design and evaluation of a digital flight control system (DFCS) for a CH-47B helicopter are presented. The DFCS employed proportional-integral control logic to provide rapid, precise response to automatic or manual guidance commands while following conventional or spiral-descent approach paths. It contained altitude- and velocity-command modes, and it adapted to varying flight conditions through gain scheduling. Extensive use was made of linear systems analysis techniques. The DFCS was designed, using linear-optimal estimation and control theory, and the effects of gain scheduling are assessed by examination of closed-loop eigenvalues and time responses.

  2. Design of BPS digital frontend for software defined radio receiver

    Institute of Scientific and Technical Information of China (English)

    王洪梅; KIM Jae-hyung; 王法广; LEE Sang-hyuk; 王雪松

    2015-01-01

    In radio receivers, complete implementation of the software defined radio (SDR) concept is mainly limited by frontend. Based on bandpass sampling (BPS) theory, a flexible digital frontend (DFE) platform for SDR receiver is designed. In order to increase the processing speed, Gigabit Ethernet was applied in the platform at speed of 5×108 bit/s. By appropriate design of interpolant according to the position of input RF signals, multi-band receiving can be realized in the platform with suppression more than 35 dB without changing hardware.

  3. Optimal Multiobjective Design of Digital Filters Using Taguchi Optimization Technique

    Science.gov (United States)

    Ouadi, Abderrahmane; Bentarzi, Hamid; Recioui, Abdelmadjid

    2014-01-01

    The multiobjective design of digital filters using the powerful Taguchi optimization technique is considered in this paper. This relatively new optimization tool has been recently introduced to the field of engineering and is based on orthogonal arrays. It is characterized by its robustness, immunity to local optima trapping, relative fast convergence and ease of implementation. The objectives of filter design include matching some desired frequency response while having minimum linear phase; hence, reducing the time response. The results demonstrate that the proposed problem solving approach blended with the use of the Taguchi optimization technique produced filters that fulfill the desired characteristics and are of practical use.

  4. Hidden loss

    DEFF Research Database (Denmark)

    Kieffer-Kristensen, Rikke; Johansen, Karen Lise Gaardsvig

    2013-01-01

    to participate. RESULTS: All children were affected by their parents' ABI and the altered family situation. The children's expressions led the authors to identify six themes, including fear of losing the parent, distress and estrangement, chores and responsibilities, hidden loss, coping and support. The main...... the ill parent. These findings contribute to a deeper understanding of the traumatic process of parental ABI that some children experience and emphasize the importance of family-centred interventions that include the children....

  5. Design and Usability of Digital Libraries: Case Studies in the Asia Pacific

    Science.gov (United States)

    Theng, Yin-Leng, Ed.; Foo, Schubert, Ed.

    2005-01-01

    This book showcases some of the best digital library practices from organizations in the Asia Pacific. Particular emphasis has been placed on the design, use and usability of digital libraries. Not only are digital libraries examined, but related technologies, the management of knowledge in digital libraries, and the associated usability and…

  6. Design and Usability of Digital Libraries: Case Studies in the Asia Pacific

    Science.gov (United States)

    Theng, Yin-Leng, Ed.; Foo, Schubert, Ed.

    2005-01-01

    This book showcases some of the best digital library practices from organizations in the Asia Pacific. Particular emphasis has been placed on the design, use and usability of digital libraries. Not only are digital libraries examined, but related technologies, the management of knowledge in digital libraries, and the associated usability and…

  7. Optical notch filter design based on digital signal processing

    Institute of Scientific and Technical Information of China (English)

    GUO Sen; ZHANG Juan; LI Xue

    2011-01-01

    Based on digital signal processing theory, a novel method of designing optical notch filter is proposed for Mach-Zehnder interferometer with cascaded optical fiber rings coupled structure. The method is simple and effective, and it can be used to implement the designing of the optical notch filter which has arbitrary number of notch points in one free spectrum range (FSR). A design example of notch filter based on cascaded single-fiber-rings is given. On this basis, an improved cascaded double-fiber-rings structure is presented to eliminate the effect of phase shift caused by the single-fiber-ring structure. This new structure can improve the stability and applicability of system. The change of output intensity spectrum is finally investigated for each design parameter and the tuning characteristics of the notch filter are also discussed.

  8. Preliminary design and implementation of the baseline digital baseband architecture for advanced deep space transponders

    Science.gov (United States)

    Nguyen, T. M.; Yeh, H.-G.

    1993-01-01

    The baseline design and implementation of the digital baseband architecture for advanced deep space transponders is investigated and identified. Trade studies on the selection of the number of bits for the analog-to-digital converter (ADC) and optimum sampling schemes are presented. In addition, the proposed optimum sampling scheme is analyzed in detail. Descriptions of possible implementations for the digital baseband (or digital front end) and digital phase-locked loop (DPLL) for carrier tracking are also described.

  9. Reconfigurable signal processor designs for advanced digital array radar systems

    Science.gov (United States)

    Suarez, Hernan; Zhang, Yan (Rockee); Yu, Xining

    2017-05-01

    The new challenges originated from Digital Array Radar (DAR) demands a new generation of reconfigurable backend processor in the system. The new FPGA devices can support much higher speed, more bandwidth and processing capabilities for the need of digital Line Replaceable Unit (LRU). This study focuses on using the latest Altera and Xilinx devices in an adaptive beamforming processor. The field reprogrammable RF devices from Analog Devices are used as analog front end transceivers. Different from other existing Software-Defined Radio transceivers on the market, this processor is designed for distributed adaptive beamforming in a networked environment. The following aspects of the novel radar processor will be presented: (1) A new system-on-chip architecture based on Altera's devices and adaptive processing module, especially for the adaptive beamforming and pulse compression, will be introduced, (2) Successful implementation of generation 2 serial RapidIO data links on FPGA, which supports VITA-49 radio packet format for large distributed DAR processing. (3) Demonstration of the feasibility and capabilities of the processor in a Micro-TCA based, SRIO switching backplane to support multichannel beamforming in real-time. (4) Application of this processor in ongoing radar system development projects, including OU's dual-polarized digital array radar, the planned new cylindrical array radars, and future airborne radars.

  10. Managing Hidden Costs of Offshoring

    DEFF Research Database (Denmark)

    Larsen, Marcus M.; Pedersen, Torben

    2014-01-01

    This chapter investigates the concept of the ‘hidden costs’ of offshoring, i.e. unexpected offshoring costs exceeding the initially expected costs. Due to the highly undefined nature of these costs, we position our analysis towards the strategic responses of firms’ realisation of hidden costs....... In this regard, we argue that a major response to the hidden costs of offshoring is the identification and utilisation of strategic mechanisms in the organisational design to eventually achieving system integration in a globally dispersed and disaggregated organisation. This is heavily moderated by a learning...

  11. An Integration Framework for Digital Progressive Die Design and Manufacturing

    Institute of Scientific and Technical Information of China (English)

    WANG Guoxian; ZHANG Wenzu; A. Y. C. Nee

    2006-01-01

    This paper reports an effort to develop an intelligent integration framework for digital progressive die design and manufacturing. Both data- and process-centric integration functions are provided by the framework as if a special ight-weight PDM/PLM (Product Data Management/Product Lifecycle Management) and WM (Workflow Management) system is embedded in the integrated engineering environment. A flexible integration approach based on the CAD (Computer-Aided Design) framework tenet is employed to rapidly build up the system while the intrinsic characteristics of the process are comprehensively taken into account. Introduction of this integration framework would greatly improve the dynamic performance of the overall progressive die design and manufacturing process.

  12. Design and Implementation of a Cueing Wideband Digital EW Receiver

    Institute of Scientific and Technical Information of China (English)

    ZHU Jun; TANG Bin; WU Wei; JIANG Zong-ming; ZHANG Chang-ju; YIN Mao-wei; DEN Ming-yi; DU Dong-ping

    2006-01-01

    A cueing wideband digital Electronic Warfare (EW) receiver is presented. The proposed receiver, which is to measure the instantaneous frequency and bandwidth of the intercept short-duration pulse radar signals that cue and match the corresponding ones, meets the requirements of good sensitivity and dynamic range for EW and can save hardware resources greatly as well. In addition, real-time signal processing, which is the main bottleneck for covering a wide instantaneous frequency band for EW receiver, is better solved in the proposed design structure. The highly efficient implementation and good parameter estimation algorithms are proposed as well. Theoretical analysis and experimental results show that this structure is feasible.

  13. Ceramic Prototypes – Design, Computation, and Digital Fabrication

    Directory of Open Access Journals (Sweden)

    M. Bechthold

    2016-12-01

    Full Text Available Research in ceramic material systems at Harvard University has introduced a range of novel applications which combine digital manufacturing technologies and robotics with imaginative design and engineering methods. Prototypes showcase the new performative qualities of ceramics and the integration of this material in today’s construction culture. Work ranges from daylight control systems to structural applications and a robotic tile placement system. Emphasis is on integrating novel technologies with tried and true manufacturing methods. The paper describes two distinct studies – one on 3D print-ing of ceramics, the other on structural use of large format thin tiles.

  14. The users centered design of a new digital fluorometer

    Energy Technology Data Exchange (ETDEWEB)

    Farias, Marcos S.; Santos, Isaac J.A.L. dos; Grecco, Claudio H.S.; Pedrosa, Paulo S.; Colthurst, Carlos M.; Szabo, Andre P. [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil)], e-mail: msantana@ien.gov.br, e-mail: luquetti@ien.gov.br, e-mail: grecco@ien.gov.br, e-mail: pedrosa@ien.gov.br, e-mail: mcdonald@ien.gov.br, e-mail: szabo@ien.gov.br

    2009-07-01

    The fluorometer is the equipment used in chemical analysis laboratories, research institutes and nuclear fuel cycle companies. This equipment measures an unknown amount of uranium in ores, rivers, etc. The fluorometer functioning is based on the uranium fluorescence when submitted to the ultraviolet radiation incidence. The fluorescence is measured by an electronic optic system with optics filters, photomultiplier tube, and a current amplifier. The user centered design involves the user in the product development in all phases of the design process. Users are not simply consulted at the beginning of the design process and evaluated the system at the end; they are treated as partners throughout the design process. The user centered design emphasizes the needs and abilities of the users and improves the usability of the equipment. The activity centered design emphasizes the development of the equipment with a deep understanding of the users activities and of the current work practices of the users. The aim of this paper is to present a methodological framework that contributes to the design and evaluation of a new digital fluorometer towards an approach related to the users and their activities. This methodological framework includes users-based testing, interviews, questionnaires, human factors standards and guidelines, the users activity analysis and users satisfaction questionnaire. (author)

  15. The users centered design of a new digital fluorometer

    Energy Technology Data Exchange (ETDEWEB)

    Farias, Marcos S.; Santos, Isaac J.A.L. dos; Gomes, Luciene B.C.; Colthurst, Carlos M.; Szabo, Andre P.; Souza, Alvaro S.F. [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil)], E-mail: msantana@ien.gov.br, E-mail: luquetti@ien.gov.br, E-mail: luciene@ien.gov.br, E-mail: mcdonald@ien.gov.br, E-mail: szabo@ien.gov.br, E-mail: alvaro@ien.gov.br

    2007-07-01

    The fluorometer is an equipment used in chemical analysis laboratories, research institutes and nuclear fuel cycle companies. This equipment measures an unknown amount of uranium in ores, rivers, etc. The fluorometer functioning is based on the uranium fluorescence when submitted to the ultraviolet radiation incidence. The fluorescence is measured by an electronic optic system with optics filters, photomultiplier tube, and a current amplifier. The user centered design involves the user in the product development in all phases of the design process. Users are not simply consulted at the beginning of the design process and evaluated the system at the end; they are treated as partners throughout the design process. The user centered design emphasizes the needs and abilities of the users and improves the usability of the equipment. The activity centered design emphasizes the development of the equipment with a deep understanding of the users activities and of the current work practices of the users. The aim of this paper is to present a methodological framework that contributes to the design and evaluation of a new digital fluorometer towards an approach related to the users and their activities. This methodological framework includes users-based testing, interviews, questionnaires, human factors standards and guidelines, the users activity analysis and users satisfaction questionnaire. (author)

  16. Design of recursive variable digital filters with theoretically guaranteed stability

    Science.gov (United States)

    Deng, Tian-Bo

    2016-12-01

    Stability is one of the most concerned issues in designing a recursive variable digital filter (VDF). This is because the coefficients of a recursive VDF constantly vary in the tuning process, and updating the coefficients may incur instability. Thus, an appropriate measure needs to be taken for ensuring its stability. This paper presents a new coefficient transformation (CT) method for transforming the coefficients of a recursive transfer-function denominator into a set of new coefficients. From the viewpoint of conventional constant-coefficient filter (constant filter) design, the new coefficients can take arbitrary values without incurring instability. For designing a stable VDF, we apply this CT to the variable case and approximate each transformed coefficient as a distinct polynomial in the tuning parameter. Thus, we can change the filter coefficients by changing the value of the tuning parameter, and thus tune the magnitude response. Thanks to the proposed CT, updating the filter coefficients will never incur instability. This is the core part of the CT-based design approach. In this paper, we utilise a weighting function to ignore the transition-band errors and thus enhance the design accuracy of important frequency bands (passband and stopband). Moreover, the polynomials use different degrees so as to reduce the VDF complexity. Two design examples (lowpass VDF and bandpass VDF) are provided for verifying the design accuracy and checking the stability.

  17. CMOS Low Power Cell Library for Digital Design

    Directory of Open Access Journals (Sweden)

    Kanika Kaur

    2013-06-01

    Full Text Available Historically, VLSI designers have focused on increasing the speed and reducing the area of digital systems. However, the evolution of portable systems and advanced Deep Sub-Micron fabrication technologies have brought power dissipation as another critical design factor. Low power design reduces cooling cost and increases reliability especially for high density systems. Moreover, it reduces the weight and size of portable devices. The power dissipation in CMOS circuits consists of static and dynamic components. Since dynamic power is proportional to V2 dd and static power is proportional to Vdd, lowering the supply voltage and device dimensions, the transistor threshold voltage also has to be scaled down to achieve the required performance. In case of static power, the power is consumed during the steady state condition i.e when there are no input/output transitions. Static power has two sources: DC power and Leakage power. Consecutively to facilitate voltage scaling without disturbing the performance, threshold voltage has to be minimized. Furthermore it leads to better noise margins and helps to avoid the hot carrier effects in short channel devices. In this paper we have been proposed the new CMOS library for the complex digital design using scaling the supply voltage and device dimensions and also suggest the methods to control the leakage current to obtain the minimum power dissipation at optimum value of supply voltage and transistor threshold. In this paper CMOS Cell library has been implemented using TSMC (0.18um and TSMC (90nm technology using HEP2 tool of IC designing from Mentor Graphics for various analysis and simulations.

  18. Research and design on DMD digital photolithography system

    Science.gov (United States)

    Rao, Yufang; Gao, Yiqing; Luo, Ningning; He, Shuai

    2010-10-01

    As the critical dimension of chip shrinking the semiconductor industry has developed fully from deep sub-micron to the nano-dimension. In particular, entering the nano-dimension, lithography mask technology, among a variety of lithography method, has become a key technology which can be applied to determine their prospect. However, the proportions which mask cost accounted for in the costs of the entire lithography are rising. The increasing price of mask cost caused intense competition among global mask manufacturers. How to reduce mask cost and utilizing maskless lithography technology, the hot topic in lithography industry, have become an important subject for a lithography engineer to study. Based on ultraviolet light source and the digital gray-scale mask exposure technology, a new method of photolithography is proposed. First of all, we determine the overall program of DMD digital photolithography system, analyse and design each part of the system. On the whole, DMD digital photolithography system consists of upper-computer system, control system and optical system. Upper-computer system is the centre of control and administration. The whole system is supervised by host computer and subsystem is controlled by MCU respectively. Each MCU exchanges information and data through computer interface. Control system is composed of several subsystems such as master-slave computer interface, step motor drive, limit switch, DMD drive, solenoid valve drive subsystem. Illumination system, digital micro-mirror device (DMD) and projection objective made up optical system. Emitted from light source, light beam goes through illumination system and then illuminate mask (DMD). At the same time, DMD drive is performed and mask image is shaped. Then, the image is copied to light-sensitive photoresist by projection objective, which is coated on the substrate. Secondly, investigating key technologies such as the software design of upper-computer and control system, we set up

  19. Design of Low Noise 16-bit CMOS Digitally Controlled Oscillator

    Directory of Open Access Journals (Sweden)

    Nitin Kumar

    2012-02-01

    Full Text Available In this paper, a new differential delay cell is proposed and 16-bit Digital Controlled Oscillator (DCO based on proposed delay cell is designed. The 16-bit DCO consist of 4-stages differential delay cell in ring structure and a digital control scheme has been used to improved noise characteristics. The structure of the DCO utilizes dual delay path techniques to achieve high oscillation frequency and awide tuning range. The DCO circuit has been simulated in SPICE with 0.5μm technology operating with supply voltage of 5V. DCO achieved a controllable frequency range of [1.7324-4.8649] GHz with a tuningrange of 3.1325GHz (≈64%. The measured output noise is -161.2dB/Hz and the total harmonic distortion have been found 75.4865dB with 6666H control word. The phase noise in proposed DCO design is -179.4dB/Hz at a frequency of 1.7324GHz.

  20. The engineering design integration (EDIN) system. [digital computer program complex

    Science.gov (United States)

    Glatt, C. R.; Hirsch, G. N.; Alford, G. E.; Colquitt, W. N.; Reiners, S. J.

    1974-01-01

    A digital computer program complex for the evaluation of aerospace vehicle preliminary designs is described. The system consists of a Univac 1100 series computer and peripherals using the Exec 8 operating system, a set of demand access terminals of the alphanumeric and graphics types, and a library of independent computer programs. Modification of the partial run streams, data base maintenance and construction, and control of program sequencing are provided by a data manipulation program called the DLG processor. The executive control of library program execution is performed by the Univac Exec 8 operating system through a user established run stream. A combination of demand and batch operations is employed in the evaluation of preliminary designs. Applications accomplished with the EDIN system are described.

  1. Cost Analysis of Different Digital Fir Filter Design Methods

    Directory of Open Access Journals (Sweden)

    Amninder Singh,

    2014-05-01

    Full Text Available FIR digital filters are widely used in the communication world. The implementation cost of filter circuit is counted by the number of multipliers & adders used, that decides the chip area. In this paper, design techniques of low pass FIR filter using the different windows are presented. The simulation is done in MATLAB. It is shown that filter designed using Hamming and Blackman windows are better than rest of the windows used. Out of two, Hamming window is better as its transition width is narrow, 0.019 than Blackman, 0.034. Further the performance analysis of Kaiser Window, Equiripple and Minimum phase filters was obtained, for same 0.04 transition width. There is a disparity in implementation cost & area. The minimum phase filter can be implemented with lesser number of filter coefficients with tolerable pass-band, stop-band ripples specifications.

  2. Design of two-dimensional digital filters using neural networks

    Institute of Scientific and Technical Information of China (English)

    Wang Xiaohua; He Yigang

    2005-01-01

    A new approach for the design of two-dimensional (2-D) linear phase FIR digital filters based on a new neural networks algorithm (NNA) is provided. A compact expression for the transfer function of a 2-D linear phase FIR filter is derived based on its frequency response characteristic, and the NNA, based on minimizing the square-error in the frequency-domain, is established according to the compact expression. To illustrate the stability of the NNA, the convergence theorem is presented and proved. Design examples are also given, and the results show that the ripple is considerably small in passband and stopband, and the NNA-based method is of powerful stability and requires quite little amount of computations.

  3. The Hidden Costs of Offshoring

    DEFF Research Database (Denmark)

    Møller Larsen, Marcus; Manning, Stephan; Pedersen, Torben

    2011-01-01

    This study seeks to explain hidden costs of offshoring, i.e. unexpected costs resulting from the relocation of business tasks and activities outside the home country. We develop a model that highlights the role of complexity, design orientation and experience in explaining hidden costs of offshor...... of our study is to suggest how hidden costs of offshoring can be mitigated through an explicit orientation towards improving organizational processes and structures as well as experience with offshoring.......This study seeks to explain hidden costs of offshoring, i.e. unexpected costs resulting from the relocation of business tasks and activities outside the home country. We develop a model that highlights the role of complexity, design orientation and experience in explaining hidden costs...... of offshoring. Specifically, we propose that hidden costs can be explained by the combination of increasing structural, operational and social complexity of offshoring activities. In addition, we suggest that firm orientation towards organizational design as part of an offshoring strategy and offshoring...

  4. ASIC Design and Implementation for Digital Pulse Compression Chip

    Institute of Scientific and Technical Information of China (English)

    高俊峰; 韩月秋; 王巍

    2004-01-01

    A novel ASIC design of changeable-point digital pulse compression (DPC) chip is presented. System hardware resource is reduced to one third of the traditional design method through operations sharing hardware, i.e. let FFT, complex multiplication and IFFT be fulfilled with the same hardware structure. Block-floating-point scaling is used to enhance the dynamic range and computation accuracy. This design applies parallel pipeline structure and the radix-4 butterfly operation to improve the processing speed. In addition, a triple-memory-space(TMS) configuration is used that allows input, computation and output operations to be overlapped, so that the dual-butterfly unit is never left in an idle state waiting for I/O operation. The whole design is implemented with only one chip of XC2V500-5 FPGA. It can implement 1 024-point DPC within 91.6 μs.The output data is converted to floating-point formation to achieve seamless interface with TMS320C6701. The validity of the design is verified by simulation and measurement results.

  5. Collaboration Between Art Teacher Students and Communication and Digital Media Students Promoting Subject Specific Didactics in Digital Visual Learning Design

    DEFF Research Database (Denmark)

    Buhl, Mie; Skov, Kirsten

    at achieving the necessary competences to teach visual arts in school. This, however, challenges both student teachers as well as their lecturers in how to use digital media for doing artwork that goes beyond the well-known re-mediations (image processing or editing programs) of traditional media like painting......This paper presents research perspective on how the collaboration between communication designers and teacher trainers in visual arts facilitates the development of new forms of digital visual learning. Our discussion is based on an empirical project of developing a digital visual learning design....... Student art teachers and teacher trainers took part in the design process performed by communication students. The project took its point of the departure in the act of Danish teacher education where student teachers must be educated in the practical use of digital visual media for art practices aiming...

  6. A Metadata Registry for the Semantic Web; Meta-Design of a Community Digital Library; Levels of Service for Digital Repositories; Indigenous Cultural and Intellectual Property Rights: A Digital Library Context.

    Science.gov (United States)

    Heery, Rachel; Wagner, Harry; Wright, Michael; Marlino, Mary; Sumner, Tamara; LeFurgy, William G.; Sullivan, Robert

    2002-01-01

    These four articles discuss the role of metadata registries for the Semantic Web; the development of a community digital library called the Digital Library for Earth System Education using meta-design; digital preservation and levels of service for digital repositories; and digitizing cultural materials and indigenous cultural and intellectual…

  7. Digitally controlled oscillator design with a variable capacitance XOR gate

    Institute of Scientific and Technical Information of China (English)

    Manoj Kumar; Sandeep K. Arya; Sujata Pandey

    2011-01-01

    A digitally controlled oscillator (DCO) using a three-transistor XOR gate as the variable load has been presented.A delay cell using an inverter and a three-transistor XOR gate as the variable capacitance is also proposed.Three-,five- and seven-stage DCO circuits have been designed using the proposed delay cell.The output frequency is controlled digitally with bits applied to the delay cells.The three-bit DCO shows output frequency and power consumption variation in the range of 3.2486-4.0267 GHz and 0.6121-0.3901 mW,respectively,with a change in the control word 1 1 1-000.The five-bit DCO achieves frequency and power of 1.8553-2.3506 GHz and 1.0202-0.6501 mW,respectively,with a change in the control word 11111-00000.Moreover,the seven-bit DCO shows a frequency and power consumption variation of 1.3239-1.6817 GHz and 1.4282-0.9102 m W,respectively,with a varying control word 1111111-0000000.The power consumption and output frequency of the proposed circuits have been compared with earlier reported circuits and the present approaches show significant improvements.

  8. A digital patient for computer-aided prosthesis design.

    Science.gov (United States)

    Colombo, Giorgio; Facoetti, Giancarlo; Rizzi, Caterina

    2013-04-06

    This article concerns the design of lower limb prosthesis, both below and above knee. It describes a new computer-based design framework and a digital model of the patient around which the prosthesis is designed and tested in a completely virtual environment. The virtual model of the patient is the backbone of the whole system, and it is based on a biomechanical general-purpose model customized with the patient's characteristics (e.g. anthropometric measures). The software platform adopts computer-aided and knowledge-guided approaches with the goal of replacing the current development process, mainly hand made, with a virtual one. It provides the prosthetics with a set of tools to design, configure and test the prosthesis and comprehends two main environments: the prosthesis modelling laboratory and the virtual testing laboratory. The first permits the three-dimensional model of the prosthesis to be configured and generated, while the second allows the prosthetics to virtually set up the artificial leg and simulate the patient's postures and movements, validating its functionality and configuration. General architecture and modelling/simulation tools for the platform are described as well as main aspects and results of the experimentation.

  9. Design and evaluation of digital learning material for academic education in human nutrition

    NARCIS (Netherlands)

    Busstra, M.C.

    2008-01-01

    E-learning and digital learning materials are becoming more and more popular. Therefore we investigated the value of digital learning material for academic education in Human Nutrition. Five digital modules were developed focusing on for example design, analysis and interpretation of nutrigenomics

  10. Low-Power Low-Noise CMOS Imager Design: in Micro-Digital Sun Sensor Application

    NARCIS (Netherlands)

    Xie, N.

    2012-01-01

    A digital sun sensor is superior to an analog sun sensor in aspects of resolution, albedo immunity, and integration. The proposed Micro-Digital Sun Sensor (µDSS) is an autonomous digital sun sensor which is implemented by means of a CMOS image sensor, which is named APS+. The µDSS is designed speci

  11. Hybrid Placemaking in the Library: Designing Digital Technology to Enhance Users' On-Site Experience

    Science.gov (United States)

    Bilandzic, Mark; Johnson, Daniel

    2013-01-01

    This paper presents research findings and design strategies that illustrate how digital technology can be applied as a tool for "hybrid" placemaking in ways that would not be possible in purely digital or physical spaces. Digital technology has revolutionised the way people learn and gather new information. This trend has challenged the…

  12. Design and evaluation of digital learning material for academic education in human nutrition

    NARCIS (Netherlands)

    Busstra, M.C.

    2008-01-01

    E-learning and digital learning materials are becoming more and more popular. Therefore we investigated the value of digital learning material for academic education in Human Nutrition. Five digital modules were developed focusing on for example design, analysis and interpretation of nutrigenomics r

  13. Learning via Game Design: From Digital to Card Games and Back Again

    Science.gov (United States)

    Marchetti, Emanuela; Valente, Andrea

    2015-01-01

    In this paper we consider the problem of making design of digital games accessible to primary school children and their teachers, and we argue for the need of digital games that are easy to alter by young learners. We know from previous research projects that digital games do not enable children to express their creativity at full, in contrast…

  14. Hidden attractors in a chaotic system with an exponential nonlinear term

    Science.gov (United States)

    Pham, V.-T.; Vaidyanathan, S.; Volos, C. K.; Jafari, S.

    2015-07-01

    Studying systems with hidden attractors is new attractive research direction because of its practical and threoretical importance. A novel system with an exponential nonlinear term, which can exhibit hidden attractors, is proposed in this work. Although new system possesses no equilibrium points, it displays rich dynamical behaviors, like chaos. By calculating Lyapunov exponents and bifurcation diagram, the dynamical behaviors of such system are discovered. Moreover, two important features of a chaotic system, the possibility of synchronization and the feasibility of the theoretical model, are also presented by introducing an adaptive synchronization scheme and designing a digital hardware platform-based emulator.

  15. Designing Social Media for Informal Learning and Knowledge Maturing in the Digital Workplace

    Science.gov (United States)

    Ravenscroft, A.; Schmidt, A.; Cook, J.; Bradley, C.

    2012-01-01

    This paper presents an original approach to designing social media that support informal learning in the digital workplace. It adapts design-based research to take into account the embeddedness of interactions within digitally mediated work-based contexts. The approach is demonstrated through the design, implementation, and evaluation of software…

  16. Refining "Teacher Design Capacity": Mathematics Teachers' Interactions with Digital Curriculum Resources

    Science.gov (United States)

    Pepin, B.; Gueudet, G.; Trouche, L.

    2017-01-01

    The goal of this conceptual paper is to develop enhanced understandings of mathematics teacher design and design capacity when interacting with digital curriculum resources. We argue that digital resources in particular offer incentives and increasing opportunities for mathematics teachers' design, both individually and in collectives. Indeed they…

  17. Design and Implementation of a Digital Angular Rate Sensor

    Directory of Open Access Journals (Sweden)

    Zhen Peng

    2010-10-01

    Full Text Available With the aim of detecting the attitude of a rotating carrier, the paper presents a novel, digital angular rate sensor. The sensor consists of micro-sensing elements (gyroscope and accelerometer, signal processing circuit and micro-processor (DSP2812. The sensor has the feature of detecting three angular rates of a rotating carrier at the same time. The key techniques of the sensor, including sensing construction, sensing principles, and signal processing circuit design are presented. The test results show that the sensor can sense rolling, pitch and yaw angular rate at the same time and the measurement error of yaw (or pitch angular rate and rolling rate of the rotating carrier is less than 0.5%.

  18. Design and implementation of a digital angular rate sensor.

    Science.gov (United States)

    Wu, Li-Feng; Peng, Zhen; Zhang, Fu-Xue

    2010-01-01

    With the aim of detecting the attitude of a rotating carrier, the paper presents a novel, digital angular rate sensor. The sensor consists of micro-sensing elements (gyroscope and accelerometer), signal processing circuit and micro-processor (DSP2812). The sensor has the feature of detecting three angular rates of a rotating carrier at the same time. The key techniques of the sensor, including sensing construction, sensing principles, and signal processing circuit design are presented. The test results show that the sensor can sense rolling, pitch and yaw angular rate at the same time and the measurement error of yaw (or pitch) angular rate and rolling rate of the rotating carrier is less than 0.5%.

  19. Design, Construction and Commissioning of the Digital Hadron Calorimeter - DHCAL

    CERN Document Server

    Adams, C; Bilki, B.; Butler, J.; Corriveau, F.; Cundiff, T.; Drake, G.; Francis, K.; Furst, B.; Guarino, V.; Haberichter, B.; Hazen, E.; Hoff, J.; Holm, S.; Kreps, A.; DeLurgio, P.; Matijas, Z.; Monte, L.Dal; Mucia, N.; Norbeck, E.; Northacker, D.; Onel, Y.; Pollack, B.; Repond, J.; Schlereth, J.; Skrzecz, F.; Smith, J.R.; Trojand, D.; Underwood, D.; Velasco, M.; Walendziak, J.; Wood, K.; Wu, S.; Xia, L.; Zhang, Q.; Zhao, A.

    2016-01-01

    A novel hadron calorimeter is being developed for future lepton colliding beam detectors. The calorimeter is optimized for the application of Particle Flow Algorithms (PFAs) to the measurement of hadronic jets and features a very finely segmented readout with 1 x 1 cm2 cells. The active media of the calorimeter are Resistive Plate Chambers (RPCs) with a digital, i.e. one-bit, readout. To first order the energy of incident particles in this calorimeter is reconstructed as being proportional to the number of pads with a signal over a given threshold. A large-scale prototype calorimeter with approximately 500,000 readout channels has been built and underwent extensive testing in the Fermilab and CERN test beams. This paper reports on the design, construction, and commissioning of this prototype calorimeter.

  20. Design and implementation of a remotely managed digital signage solution

    OpenAIRE

    Regmi, Amrit

    2015-01-01

    Industries and businesses are moving to digital signage from the traditional printed signage as a tool for advertisement and broadcasting information to clients, potential customers, and the public. The availability of affordable flat screen digital displays has enabled the businesses to replace printed signage with digital signage. As a result, digital signage is expected play an important role in delivering information to the public as it can be customized to display timely information to a...

  1. Using the Saliency-Based Model to Design a Digital Archaeological Game to Motivate Players' Intention to Visit the Digital Archives of Taiwan's Natural Science Museum

    Science.gov (United States)

    Hong, Jon-Chao; Hwang, Ming-Yueh; Chen, Yu-Ju; Lin, Pei-Hsin; Huang, Yao-Tien; Cheng, Hao-Yueh; Lee, Chih-Chin

    2013-01-01

    Museums in Taiwan have developed various digital archives, but few people have visited these digital archives. Therefore, this study designed a digital archaeology game for high school students to play. Based on the concept of "learning for playing" (i.e., players who want to win will study more), the digital archaeology game contest aims at…

  2. Using the Saliency-Based Model to Design a Digital Archaeological Game to Motivate Players' Intention to Visit the Digital Archives of Taiwan's Natural Science Museum

    Science.gov (United States)

    Hong, Jon-Chao; Hwang, Ming-Yueh; Chen, Yu-Ju; Lin, Pei-Hsin; Huang, Yao-Tien; Cheng, Hao-Yueh; Lee, Chih-Chin

    2013-01-01

    Museums in Taiwan have developed various digital archives, but few people have visited these digital archives. Therefore, this study designed a digital archaeology game for high school students to play. Based on the concept of "learning for playing" (i.e., players who want to win will study more), the digital archaeology game contest…

  3. The Design of A Digital Family Multi-Service System Based on Triple-Play Technology

    Directory of Open Access Journals (Sweden)

    Yong Liu

    2013-04-01

    Full Text Available Under the background of three-net fusion, this study introduces a design of digital home multi-service system and elaborates from the perspective of digital TV broadcasting operation platform, interactive TV operation platform, home gateway and digital TV home multi-service terminals. This design is aimed to promote the two-way transformation of cable digital Television and the construction of operation platform. This will effectively help to accelerate the development of digital home service and broadcast television technology in Wujin.

  4. Designing for Learning: Multiplayer Digital Game Learning Environments

    Science.gov (United States)

    Kim, Chung On

    2010-01-01

    Many people in general think that digital game environment has potential as a learning environment. However, empirical research in digital game environment and education is a still relative young field, so to create a digital learning environment where students are actively engaged in the learning process is a great challenge. In part, it has been…

  5. Designing the vertigo experience: vertigo as a design resource for digital bodily play

    OpenAIRE

    Byrne, Richard; Marshall, Joe; Mueller, Florian ‘Floyd’

    2016-01-01

    Vertigo can be described as an attempt to momentarily destroy the stability of perception and inflict a kind of voluptuous panic upon an otherwise lucid mind. Vertigo has, however, not been generally considered as a design resource and we believe it to be under-explored in the area of digital bodily play. To investigate how vertigo could be considered as a design resource in this context, we conducted a review of relevant literature and held a design workshop with nine students to explore the...

  6. Managing Hidden Costs of Offshoring

    DEFF Research Database (Denmark)

    Larsen, Marcus M.; Pedersen, Torben

    2014-01-01

    This chapter investigates the concept of the ‘hidden costs’ of offshoring, i.e. unexpected offshoring costs exceeding the initially expected costs. Due to the highly undefined nature of these costs, we position our analysis towards the strategic responses of firms’ realisation of hidden costs. In......-by-doing process, where hidden costs motivate firms and their employees to search for new and better knowledge on how to successfully manage the organisation. We illustrate this thesis based on the case of the LEGO Group.......This chapter investigates the concept of the ‘hidden costs’ of offshoring, i.e. unexpected offshoring costs exceeding the initially expected costs. Due to the highly undefined nature of these costs, we position our analysis towards the strategic responses of firms’ realisation of hidden costs....... In this regard, we argue that a major response to the hidden costs of offshoring is the identification and utilisation of strategic mechanisms in the organisational design to eventually achieving system integration in a globally dispersed and disaggregated organisation. This is heavily moderated by a learning...

  7. Digital Sketch Modelling: Integrating Digital Sketching as a Transition between Sketching and CAD in Industrial Design Education

    Science.gov (United States)

    Ranscombe, Charlie; Bissett-Johnson, Katherine

    2017-01-01

    Literature on the use of design tools in educational settings notes an uneasy relationship between student use of traditional hand sketching and digital modelling tools (CAD) during the industrial design process. This is often manifested in the transition from sketching to CAD and exacerbated by a preference of current students to use CAD. In this…

  8. The Digital Cultural Atlas Project: Design Research and Cultural Narratives. An Experiential Approach for Design Education.

    OpenAIRE

    Shumack, Kaye

    2009-01-01

    This paper outlines an approach developed for teaching research methods in a graphic design program, working in an interdisciplinary context with cultural researchers. Initially, the Digital Cultural Atlas (DCA) is introduced, as a 'work-in-progress' web site, which locates a diversity of geographic and place-based cultural resources across Greater Western Sydney. The initial information architecture consists of ‘bird’s eye view’ cartographic maps and cultural project resources. Through a te...

  9. Hidden realities inside PBL design processes: Is consensus design an impossible clash of interest between the individual and the collective, and is architecture its first victim?

    Directory of Open Access Journals (Sweden)

    Ole Pihl

    2015-06-01

    Full Text Available How do architecture students experience the contradictions between the individual and the group at the Department of Architecture and Design of Aalborg University? The Problem-Based Learning model has been extensively applied to the department’s degree programs in coherence with the Integrated Design Process, but is a group-based architecture and design education better than that which is individually based? How does PBL affect space, form, and creative processes? Hans Kiib, professor and one of the founders of the Department of Architecture and Design in Aalborg, describes his intentions for the education as being intuition, reflection, artistic progression and critical interpretation (Kiib 2004. “As the reflection and critical interpretation are well integrated within the education, mostly parts of the exam evaluation, it seems like the artistic progression and intuition are somewhat drowning within the group work, as it is closer related to the actual PBL process”. Is the Integrated Design Process (Knudstrup 2004 and is Colb (1975 still current and valid? Can we still use these methodologies when we must create “learning for an unknown future,” as Ronald Barnett (2004 claims that we are passing from a complex world into one based on super complexity? Could Gaston Bachelard (1958, who writes in his book The Poetic of Space "that poets and artists are born phenomenologists," help architecture and design students in their journey to find his/her own professional expression? This paper investigates the creative processes of the collective and the individual and clarifies some of the hidden realities behind the PBL-based creative processes, both through an inquiry with the students and a more methodological and theoretical approach. The paper also explores how to integrate artistic progression and intuition within group work by investigating a group of concrete project cases from the Department of Architecture and Design based upon the

  10. Design of Conceptual Model in Digital Map Database

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The components of map information are analyzed theoretically in this paper,and the map information includes mainly the spatial information,attributive information and temporal characteristics information.Then the digital map entity is defined according to construction characteristics of the map information.Finally,on the basis of the analyses of the construction characteristics of digital map entity and present conceptual model of digital map database,an Abstracted conceptual model of digital map database is presented.And the Normal Form theory of relational database is discussed particularly.

  11. Design Centering and Yield Optimisation of MMIC’s with Off-Chip Digital Controllers

    OpenAIRE

    Centurelli, F.; Luzzi, R; Scotti, G.; Tommasino, P.; Trifiletti, A.

    2002-01-01

    In this paper, a new methodology to perform yield-oriented design of MMIC’s in III-V technologies is proposed. A digital control of MMIC bias, based on process parameters estimation by on-chip auxiliary circuits, allows yield enhancement. The design centering approach and a distance-dependent correlated statistical model of HEMT devices are used to design the external controller. The design of a MMIC for optical digital systems has highlighted significant yield improvement with respect to pre...

  12. HIDDEN WEB EXTRACTOR DYNAMIC WAY TO UNCOVER THE DEEP WEB

    OpenAIRE

    DR. ANURADHA; BABITA AHUJA

    2012-01-01

    In this era of digital tsunami of information on the web, everyone is completely dependent on the WWW for information retrieval. This has posed a challenging problem in extracting relevant data. Traditional web crawlers focus only on the surface web while the deep web keeps expanding behind the scene. The web databases are hidden behind the query interfaces. In this paper, we propose a Hidden Web Extractor (HWE) that can automatically discover and download data from the Hidden Web databases. ...

  13. SDLDS--System for Digital Logic Design and Simulation

    Science.gov (United States)

    Stanisavljevic, Z.; Pavlovic, V.; Nikolic, B.; Djordjevic, J.

    2013-01-01

    This paper presents the basic features of a software system developed to support the teaching of digital logic, as well as the experience of using it in the Digital Logic course taught at the School of Electrical Engineering, University of Belgrade, Serbia. The system has been used for several years, both by students for self-learning and…

  14. Designing Digital Resources to Effectively Scaffold Teachers' Learning

    Science.gov (United States)

    Callahan, Cory

    2014-01-01

    This article synthesizes findings from an on-going line of inquiry investigating the potential of educatively scaffolded digital resources to help teachers understand and implement a complex model of history instruction, problem-based historical inquiry. The digital resources developed for this inquiry provided teachers with wise-practice…

  15. SDLDS--System for Digital Logic Design and Simulation

    Science.gov (United States)

    Stanisavljevic, Z.; Pavlovic, V.; Nikolic, B.; Djordjevic, J.

    2013-01-01

    This paper presents the basic features of a software system developed to support the teaching of digital logic, as well as the experience of using it in the Digital Logic course taught at the School of Electrical Engineering, University of Belgrade, Serbia. The system has been used for several years, both by students for self-learning and…

  16. Digital health increasing the impact with personalized design

    NARCIS (Netherlands)

    Empelen, P. van; Otten, W.; Molema, H.; Keijsers, J.; Mooij, R.

    2016-01-01

    Digital health is considered the ‘holy grail’ of effective and sustainable health(care). It uses the latest technology, apps and data to support and improve health. Digital health tools can benefit both patients and healthy individuals, with support and advice. But healthcare professionals,

  17. Reading by Design: Two Case Studies of Digital Reading Practices

    Science.gov (United States)

    Rowsell, Jennifer; Burke, Anne

    2009-01-01

    The digital reading practices of two middle school students in US and Canadian contexts are examined. Using a multimodal discourse framework, the authors contemplate what digital reading practice is and distinctive practices of reading texts online compared with printed, school-based literacy practices. By focusing on two different genres of…

  18. Rethinking the Purposes and Processes for Designing Digital Portfolios

    Science.gov (United States)

    Hicks, Troy; Russo, Anne; Autrey, Tara; Gardner, Rebecca; Kabodian, Aram; Edington, Cathy

    2007-01-01

    As digital portfolios become more prevalent in teacher education, the purposes and processes for creating them have become contested. Originally meant to be critical and reflective spaces for learning about multimedia and conceived as contributing to professional growth, research shows that digital portfolios are now increasingly being used to…

  19. Preliminary Design Study for a National Digital Seismograph Network

    Science.gov (United States)

    Peterson, Jon; Hutt, Charles R.

    1981-01-01

    Introduction Recently, the National Research Council published a report by the Panel on National, Regional, and Local Seismograph Networks of the Committee on Seismology in which the principal recommendation was for the establishment of a national digital seismograph network (NDSN). The Panel Report (Bolt, 1980) addresses both the need and the scientific requirements for the new national network. The purpose of this study has been to translate the scientific requirements into an instrumentation concept for the NSDS. There are literally hundreds, perhaps thousands, of seismographs in operation within the United States. Each serves an important purpose, but most have limited objectives in time, in region, or in the types of data that are being recorded. The concept of a national network, funded and operated by the Federal Government, is based on broader objectives that include continuity of time, uniform coverage, standardization of data format and instruments, and widespread use of the data for a variety of research purposes. A national digital seismograph network will be an important data resource for many years to come; hence, its design is likely to be of interest to most seismologists. Seismologists have traditionally been involved in the development and field operation of seismic systems and thus have been familiar with both the potential value and the limitations of the data. However, in recent years of increasing technological sophistication, the development of data sstems has fallen more to system engineers, and this trend is likely to continue. One danger in this is that the engineers may misinterpret scientific objectives or subordinate them to purely technological considerations. Another risk is that the data users may misuse or misinterpret the data because they are not aware of the limitations of the data system. Perhaps the most important purpose of a design study such as this is to stimulate a dialogue between system engineers and potential data users

  20. Design of a 3D-IC multi-resolution digital pixel sensor

    Science.gov (United States)

    Brochard, N.; Nebhen, J.; Dubois, J.; Ginhac, D.

    2016-04-01

    This paper presents a digital pixel sensor (DPS) integrating a sigma-delta analog-to-digital converter (ADC) at pixel level. The digital pixel includes a photodiode, a delta-sigma modulation and a digital decimation filter. It features adaptive dynamic range and multiple resolutions (up to 10-bit) with a high linearity. A specific row decoder and column decoder are also designed to permit to read a specific pixel chosen in the matrix and its neighborhood of 4 x 4. Finally, a complete design with the CMOS 130 nm 3D-IC FaStack Tezzaron technology is also described, revealing a high fill-factor of about 80%.

  1. Using digital electronic design flow to create a Genetic Design Automation tool.

    Science.gov (United States)

    Gendrault, Y; Madec, M; Wlotzko, V; Andraud, M; Lallement, C; Haiech, J

    2012-01-01

    Synthetic bio-systems become increasingly more complex and their development is lengthy and expensive. In the same way, in microelectronics, the design process of very complex circuits has benefited from many years of experience. It is now partly automated through Electronic Design Automation tools. Both areas present analogies that can be used to create a Genetic Design Automation tool inspired from EDA tools used in digital electronics. This tool would allow moving away from a totally manual design of bio-systems to assisted conception. This ambitious project is presented in this paper, with a deep focus on the tool that automatically generates models of bio-systems directly usable in electronic simulators.

  2. Based on the Network Technology of Digital Campus Design and Analysis

    Directory of Open Access Journals (Sweden)

    Guo Hongbin

    2016-09-01

    Full Text Available In recent years, in order to meet the trend of popularization of higher education, expanding the scale of Chinese colleges and universities, and lead to university campuses scattered teaching resources, and information to be slow, poor accuracy and efficiency of the office problems have emerged. The construction of digital campus is not only working for the university scientific research, management provides a fast and convenient information service, and realize the education space and time, teaching contents, means and forms of further opening, largely improves the ability of teaching and scientific research ability and management level. This article through to the digital campus in the process of planning and design requirements, puts forward the conception and design of the construction of the digital campus network, then the digital campus network topology, design of core network, IP address assignment has carried on the discussion a rough. For the design of the digital campus construction provides a draft plan.

  3. Digitization

    DEFF Research Database (Denmark)

    Finnemann, Niels Ole

    2014-01-01

    Processes of digitization have for years represented a major trend in the developments of modern society but have only recently been related to processes of mediatization. The purpose of this article is to look into the relation between the concepts of mediatization and digitization and to clarify...... what a concept of digital media might add to the understanding of processes of mediatization and what the concept of mediatization might add to the understanding of digital media. It is argued that digital media open an array of new trajectories in human communication, trajectories which were...... not anticipated in previous conceptualizations of media and mediatization. If digital media are to be included, the concept of mediatization has to be revised and new parameters are to be built into the concept of media. At the same time it is argued that the concept of mediatization still provides a variety...

  4. Optical design of cipher block chaining (CBC) encryption mode by using digital holography

    Science.gov (United States)

    Gil, Sang Keun; Jeon, Seok Hee; Jung, Jong Rae; Kim, Nam

    2016-03-01

    We propose an optical design of cipher block chaining (CBC) encryption by using digital holographic technique, which has higher security than the conventional electronic method because of the analog-type randomized cipher text with 2-D array. In this paper, an optical design of CBC encryption mode is implemented by 2-step quadrature phase-shifting digital holographic encryption technique using orthogonal polarization. A block of plain text is encrypted with the encryption key by applying 2-step phase-shifting digital holography, and it is changed into cipher text blocks which are digital holograms. These ciphered digital holograms with the encrypted information are Fourier transform holograms and are recorded on CCDs with 256 gray levels quantized intensities. The decryption is computed by these encrypted digital holograms of cipher texts, the same encryption key and the previous cipher text. Results of computer simulations are presented to verify that the proposed method shows the feasibility in the high secure CBC encryption system.

  5. The Hidden Costs of Offshoring

    DEFF Research Database (Denmark)

    Møller Larsen, Marcus; Manning, Stephan; Pedersen, Torben

    2011-01-01

    experience moderate the relationship between complexity and hidden costs negatively i.e. reduces the cost generating impact of complexity. We develop three hypotheses and test them on comprehensive data from the Offshoring Research Network (ORN). In general, we find support for our hypotheses. A key result...... of offshoring. Specifically, we propose that hidden costs can be explained by the combination of increasing structural, operational and social complexity of offshoring activities. In addition, we suggest that firm orientation towards organizational design as part of an offshoring strategy and offshoring...

  6. Device and Circuit Design Challenges in the Digital Subthreshold Region for Ultralow-Power Applications

    Directory of Open Access Journals (Sweden)

    Ramesh Vaddi

    2009-01-01

    Full Text Available In recent years, subthreshold operation has gained a lot of attention due to ultra low-power consumption in applications requiring low to medium performance. It has also been shown that by optimizing the device structure, power consumption of digital subthreshold logic can be further minimized while improving its performance. Therefore, subthreshold circuit design is very promising for future ultra low-energy sensor applications as well as high-performance parallel processing. This paper deals with various device and circuit design challenges associated with the state of the art in optimal digital subthreshold circuit design and reviews device design methodologies and circuit topologies for optimal digital subthreshold operation. This paper identifies the suitable candidates for subthreshold operation at device and circuit levels for optimal subthreshold circuit design and provides an effective roadmap for digital designers interested to work with ultra low-power applications.

  7. Research and development of a digital design system for hull structures

    Science.gov (United States)

    Zhan, Yi-Ting; Ji, Zhuo-Shang; Liu, Yin-Dong

    2007-06-01

    Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was developed. Basic software systems for modeling, modifying, and assembly simulation were developed. The system has good compatibility, and models created by it can be saved in different 3-D file formats, and 2D engineering drawings can be output directly. The model can be modified dynamically, overcoming the necessity of repeated modifications during hull structural design. Through operations such as model construction, intervention inspection, and collision detection, problems can be identified and modified during the hull structural design stage. Technologies for centralized control of the system, database management, and 3-D digital design are integrated into this digital model in the preliminary design stage of shipbuilding.

  8. Research and development of a digital design system for hull structures

    Institute of Scientific and Technical Information of China (English)

    ZHAN Yi-ting; JI Zhuo-shang; LIU Yin-dong

    2007-01-01

    Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was developed. Basic software systems for modeling, modifying, and assembly simulation were developed. The system has good compatibility, and models created by it can be saved indifferent 3-D file formats, and 2D engineering drawings can be output directly. The model can be modified dynamically, overcoming the necessity of repeated modifications during hull structural design.Through operations such as model construction, intervention inspection, and collision detection,problems can be identified and modified during the hull structural design stage. Technologies for centralized control of the system, database management, and 3-D digital design are integrated into this digital model in the preliminary design stage of shipbuilding.

  9. Design Dimensions Enabling Divergent Behaviour across Physical, Digital, and Social Library Interfaces

    Science.gov (United States)

    Björneborn, Lennart

    What design dimensions across physical, digital, and social library interfaces may enable and trigger users to find more information resources than planned or known in advance? The paper outlines a conceptual framework with libraries as integrative interfaces across physical, digital, and social affordances and users that mix convergent (goal-directed) and divergent (exploratory) information behaviour. Ten design dimensions that enable and trigger divergent behaviour are outlined. Implications for persuasive design are discussed.

  10. Design of High-Speed Adders for Efficient Digital Design Blocks

    OpenAIRE

    Deepa Yagain; Vijaya Krishna A; Akansha Baliga

    2012-01-01

    The core of every microprocessor and digital signal processor is its data path. The heart of data-path and addressing units in turn are arithmetic units which include adders. Parallel-prefix adders offer a highly efficient solution to the binary addition problem and are well suited for VLSI implementations. This paper involves the design and comparison of high-speed, parallel-prefix adders such as Kogge-Stone, Brent-Kung, Sklansky, and Kogge-Stone Ling adders. It is found that Kogge-Stone Lin...

  11. Data Reshaped: Literalism in the Age of Digital Design and Architectural Fabrication

    Directory of Open Access Journals (Sweden)

    Eran Neuman

    2014-11-01

    Full Text Available This essay examines the recent shift in the perception of literalism in architecture as a result of the advent of digital media and the emergence of digital design processes. Whereas pre-digital literalism in art and architecture focused on the object and on space respectively, digital literalism is based on data transliteration and the design processes themselves. Referring to theoretical discourses that frame literal expressions as non-representational, non-metaphorical and non-analogical utterances, the essay delves into the ways in which data-based expressions become literal. The ability to digitally transliterate data and have it articulated in several (virtual or physical media enables the creation of multiple expressions of the same data that are literal with respect to each other. The essay outlines these transformations and argues that they reflect significant changes in architectural design processes and their literalisation.

  12. A REVIEW OF HUMAN-SYSTEM INTERFACE DESIGN ISSUES OBSERVED DURING ANALOG-TO-DIGITAL AND DIGITAL-TO-DIGITAL MIGRATIONS IN U.S. NUCLEAR POWER PLANTS

    Energy Technology Data Exchange (ETDEWEB)

    Kovesdi, C.; Joe, J.

    2017-05-01

    The United States (U.S.) Department of Energy (DOE) Light Water Reactor Sustainability (LWRS) program is developing a scientific basis through targeted research and development (R&D) to support the U.S. nuclear power plant (NPP) fleet in extending their existing licensing period and ensuring their long-term reliability, productivity, safety, and security. Over the last several years, human factors engineering (HFE) professionals at the Idaho National Laboratory (INL) have supported the LWRS Advanced Instrumentation, Information, and Control (II&C) System Technologies pathway across several U.S. commercial NPPs in analog-to-digital migrations (i.e., turbine control systems) and digital-to-digital migrations (i.e., Safety Parameter Display System). These efforts have included in-depth human factors evaluation of proposed human-system interface (HSI) design concepts against established U.S. Nuclear Regulatory Commission (NRC) design guidelines from NUREG-0700, Rev 2 to inform subsequent HSI design prior to transitioning into Verification and Validation. This paper discusses some of the overarching design issues observed from these past HFE evaluations. In addition, this work presents some observed challenges such as common tradeoffs utilities are likely to face when introducing new HSI technologies into NPP hybrid control rooms. The primary purpose of this work is to distill these observed design issues into general HSI design guidance that industry can use in early stages of HSI design.

  13. The Design of Digital Servo-Position Control System Based on LM629

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    <正>The paper is concerned with the digital design of the system of servo-position control for medium-low power DC motor.The paper will be focused on the digitization design of the system.Principle of PWM will be given first in this paper.According to the theory of PWM rules and the knowledge of computer control technology,the paper will design the digital servo-position system that has a good characteristic of stability and dynamic response.

  14. Analysis and design of digital output interface devices for gas turbine electronic controls

    Science.gov (United States)

    Newirth, D. M.; Koenig, E. W.

    1976-01-01

    A trade study was performed on twenty-one digital output interface schemes for gas turbine electronic controls to select the most promising scheme based on criteria of reliability, performance, cost, and sampling requirements. The most promising scheme, a digital effector with optical feedback of the fuel metering valve position, was designed.

  15. Applying the Digital Doorway design research model in facilitating skills transfer in rural communities

    CSIR Research Space (South Africa)

    Herselman, ME

    2010-11-01

    Full Text Available The purpose of this article is to indicate how skills can be transferred through the application of the Digital Doorway (DD) design research model. Skills transfer takes place between the initiators of Digital Doorway (CSIR Meraka Institute) project...

  16. Ambidexterity of design management in different approaches to digital design : review of organizational attitudes in the East and the West in new product development process

    OpenAIRE

    Hwangbo, Hyunwook; Cooper, Rachel; Tsekleves, Emmanuel

    2015-01-01

    Currently, there is growing interest in shaping a digital ecosystem that embraces holistic design approaches. In the digital realm, organizational approaches to managing design are required to shift to ‘designing’ towards holistic digital design, rather than ‘design’ for a completed output. Within this context, this paper reviews how organizational cultures can impact the development of holistic product design in competitive digital landscapes. This is done by investigating different organiza...

  17. Rethinking Design Process: Using 3D Digital Models as an Interface in Collaborative Session

    Science.gov (United States)

    Ding, Suining

    2008-01-01

    This paper describes a pilot study for an alternative design process by integrating a designer-user collaborative session with digital models. The collaborative session took place in a 3D AutoCAD class for a real world project. The 3D models served as an interface for designer-user collaboration during the design process. Students not only learned…

  18. Formal Learning Sequences and Progression in the Studio: A Framework for Digital Design Education

    Science.gov (United States)

    Wärnestål, Pontus

    2016-01-01

    This paper examines how to leverage the design studio learning environment throughout long-term Digital Design education in order to support students to progress from tactical, well-defined, device-centric routine design, to confidently design sustainable solutions for strategic, complex, problems for a wide range of devices and platforms in the…

  19. Design of Digital Learning Material on Social-Psychological Theories for Nutrition Behavior Research

    Science.gov (United States)

    Busstra, Maria C.; De Graaf, Cees; Hartog, Rob

    2007-01-01

    This article describes the design, implementation and evaluation of digital learning material on the social--psychological Theory of Planned Behavior (TPB) and its use in nutrition behavior research. The design is based on guidelines derived from theories on instructional design. The major component of the design challenge is to implement three…

  20. Rethinking Design Process: Using 3D Digital Models as an Interface in Collaborative Session

    Science.gov (United States)

    Ding, Suining

    2008-01-01

    This paper describes a pilot study for an alternative design process by integrating a designer-user collaborative session with digital models. The collaborative session took place in a 3D AutoCAD class for a real world project. The 3D models served as an interface for designer-user collaboration during the design process. Students not only learned…

  1. System design for a million channel digital spectrum analyzer /MCSA/. [of bandpass filtering in SETI receivers

    Science.gov (United States)

    Peterson, A.; Narasimha, M.; Narayan, S.

    1980-01-01

    The system design of a wideband (8 MHz) million-channel digital spectrum analyzer for use with a SETI receiver is presented. The analyzer makes use of a digital bandpass filter bank for transforming the wideband input signal into a specified number (120) of uniform narrowband output channels by the use of a Fourier transform digital processor combined with a prototype digital weighting network (finite impulse response filter). The output is then processed separately by 120 microprocessor-based discrete Fourier transform computers, each producing 8190 output channels of approximately 8 Hz bandwidth by the use of an 8190-point prime factor algorithm.

  2. Design of Absorbing Wave Maker based on Digital Filters

    DEFF Research Database (Denmark)

    Christensen, Morten; Frigaard, Peter

    An absorbing wave maker operated by means of on-line signals from digital FIR filters is presented. Surface elevations are measured in two positions in front of the wave maker. The reflected wave train is seperated by the sum of the incident and reflected wave trains by means of digital filtering...... and subsequent superposition of the measured surface elevations. The motion of the wave paddle required to absorb reflected waves is determined and added to the original wave paddle control signal. Irregular wave tests involving test structures with different degrees of reflection show that excellent absorption...

  3. The (digital) natives are restless: designing and implementing an interactive digital media assignment.

    Science.gov (United States)

    Voge, Catherine; Hirvela, Kari; Jarzemsky, Paula

    2012-01-01

    To create an opportunity for students to connect with the Quality and Safety Education for Nurses competencies and demonstrate learning via knowledge transference, the authors piloted a digital media assignment. Students worked in small groups to create an unfolding patient care scenario with embedded decision points, using presentation software. The authors discuss the assignment and its outcomes.

  4. Realizing the increased potential of an open-system high-definition digital projector design

    Science.gov (United States)

    Daniels, Reginald

    1999-05-01

    Modern video projectors are becoming more compact and capable. Various display technologies are very competitive and are delivering higher performance and more compact projectors to market at an ever quickening pace. However the end users are often left with the daunting task of integrating the 'off the self projectors' into a previously existing system. As the projectors become more digitally enhanced, there will be a series of designs, and the digital projector technology matures. The design solutions will be restricted by the state of the art at the time of manufacturing. In order to allow the most growth and performance for a given price, many design decisions will be made and revisited over a period of years or decades. A modular open digital system design concept is indeed a major challenge of the future high definition digital displays for al applications.

  5. Analog and Digital Circuit Design in 65 nm CMOS: End of the Road?

    CERN Document Server

    Gielen, Georges; Christie, Phillip; Draxelmayr, Dieter; Janssens, Edmond; Maex, Karen; Vucurevich, Ted

    2011-01-01

    This special session adresses the problems that designers face when implementing analog and digital circuits in nanometer technologies. An introductory embedded tutorial will give an overview of the design problems at hand : the leakage power and process variability and their implications for digital circuits and memories, and the reducing supply voltages, the design productivity and signal integrity problems for embedded analog blocks. Next, a panel of experts from both industrial semiconductor houses and design companies, EDA vendors and research institutes will present and discuss with the audience their opinions on whether the design road ends at marker "65nm" or not.

  6. Extending connections between land and people digitally: designing with rural Herero communities in Namibia

    CSIR Research Space (South Africa)

    Bidwell, NJ

    2012-06-01

    Full Text Available -1 Heritage and Social Media: Understanding Heritage in Participatory Culture June 2012/Chapter 11 Extending connections between land and people digitally: designing with rural Herero communities in Namibia Bidwell NJ1 and Winschiers-Theophilus H2 1...CSIR. Meraka Institute. PO Box 395, Pretoria, 0001, South Africa 2Dean of the School of Information Technology at the Polytechnic of Namibia ABSTRACT Dilemmas arise in designing digital systems that enable rural dwellers to create, store...

  7. What Learners "Know" through Digital Media Production: Learning by Design

    Science.gov (United States)

    Mills, Kathy A.

    2010-01-01

    The power to influence others in ever expanding social networks in the new knowledge economy is tied to capabilities with digital media production that require increased technological knowledge. This article draws on research in primary classrooms to examine the repertoires of cross-disciplinary knowledge that literacy learners need to produce…

  8. Mobile Computing in Digital Ecosystems: Design Issues and Challenges

    CERN Document Server

    D'Angelo, Gabriele; Ghini, Vittorio; Panzieri, Fabio

    2011-01-01

    In this paper we argue that the set of wireless, mobile devices (e.g., portable telephones, tablet PCs, GPS navigators, media players) commonly used by human users enables the construction of what we term a digital ecosystem, i.e., an ecosystem constructed out of so-called digital organisms (see below), that can foster the development of novel distributed services. In this context, a human user equipped with his/her own mobile devices, can be though of as a digital organism (DO), a subsystem characterized by a set of peculiar features and resources it can offer to the rest of the ecosystem for use from its peer DOs. The internal organization of the DO must address issues of management of its own resources, including power consumption. Inside the DO and among DOs, peer-to-peer interaction mechanisms can be conveniently deployed to favor resource sharing and data dissemination. Throughout this paper, we show that most of the solutions and technologies needed to construct a digital ecosystem are already availabl...

  9. Prototype Environmental Digital Data for Materiel Design, Testing, and Evaluation

    Science.gov (United States)

    1990-10-01

    Dornbusch 1987). These factors were set in map format, digitized, and gridded at a 30-m resolu- tion using standard WES software. 13. Soil types. Soil... Dornbusch , William K. 1987. "Development of Terrain Products," STC Report 2224, Science and Technology Corporation, Hampton, VA. Hutto, Thomas D., and

  10. Towards A Framework of Digital Payment Platform Design

    DEFF Research Database (Denmark)

    Kazan, Erol; Damsgaard, Jan

    This paper focuses on the triumph march of mobile phones that currently are annexing music players, navigation devices, and cameras as separate physical objects. The next target is set on payment. Through synthesizing available literature, we construct a framework for studying digital payment pla...

  11. Design of digital learning material for bioprocess-engineering-education

    NARCIS (Netherlands)

    Schaaf, van der H.

    2007-01-01

    With the advance of computers and the internet, new types of learning material can be developed: web-based digital learning material. Because many complex learning objectives in the food- and bioprocess technology domain are difficult to achieve in a traditional learning environment, a project was s

  12. Design of digital learning material for bioprocess-engineering-education

    NARCIS (Netherlands)

    Schaaf, van der H.

    2007-01-01

    With the advance of computers and the internet, new types of learning material can be developed: web-based digital learning material. Because many complex learning objectives in the food- and bioprocess technology domain are difficult to achieve in a traditional learning environment, a project was s

  13. Design and development of digital seismic amplifier recorder

    Energy Technology Data Exchange (ETDEWEB)

    Samsidar, Siti Alaa; Afuar, Waldy; Handayani, Gunawan, E-mail: gunawanhandayani@gmail.com [Department of Physics, ITB (Indonesia)

    2015-04-16

    A digital seismic recording is a recording technique of seismic data in digital systems. This method is more convenient because it is more accurate than other methods of seismic recorders. To improve the quality of the results of seismic measurements, the signal needs to be amplified to obtain better subsurface images. The purpose of this study is to improve the accuracy of measurement by amplifying the input signal. We use seismic sensors/geophones with a frequency of 4.5 Hz. The signal is amplified by means of 12 units of non-inverting amplifier. The non-inverting amplifier using IC 741 with the resistor values 1KΩ and 1MΩ. The amplification results were 1,000 times. The results of signal amplification converted into digital by using the Analog Digital Converter (ADC). Quantitative analysis in this study was performed using the software Lab VIEW 8.6. The Lab VIEW 8.6 program was used to control the ADC. The results of qualitative analysis showed that the seismic conditioning can produce a large output, so that the data obtained is better than conventional data. This application can be used for geophysical methods that have low input voltage such as microtremor application.

  14. Design and development of digital seismic amplifier recorder

    Science.gov (United States)

    Samsidar, Siti Alaa; Afuar, Waldy; Handayani, Gunawan

    2015-04-01

    A digital seismic recording is a recording technique of seismic data in digital systems. This method is more convenient because it is more accurate than other methods of seismic recorders. To improve the quality of the results of seismic measurements, the signal needs to be amplified to obtain better subsurface images. The purpose of this study is to improve the accuracy of measurement by amplifying the input signal. We use seismic sensors/geophones with a frequency of 4.5 Hz. The signal is amplified by means of 12 units of non-inverting amplifier. The non-inverting amplifier using IC 741 with the resistor values 1KΩ and 1MΩ. The amplification results were 1,000 times. The results of signal amplification converted into digital by using the Analog Digital Converter (ADC). Quantitative analysis in this study was performed using the software Lab VIEW 8.6. The Lab VIEW 8.6 program was used to control the ADC. The results of qualitative analysis showed that the seismic conditioning can produce a large output, so that the data obtained is better than conventional data. This application can be used for geophysical methods that have low input voltage such as microtremor application.

  15. Design of digital learning material for bioprocess-engineering-education

    NARCIS (Netherlands)

    Schaaf, van der H.

    2007-01-01

    With the advance of computers and the internet, new types of learning material can be developed: web-based digital learning material. Because many complex learning objectives in the food- and bioprocess technology domain are difficult to achieve in a traditional learning environment, a project was

  16. What Learners "Know" through Digital Media Production: Learning by Design

    Science.gov (United States)

    Mills, Kathy A.

    2010-01-01

    The power to influence others in ever expanding social networks in the new knowledge economy is tied to capabilities with digital media production that require increased technological knowledge. This article draws on research in primary classrooms to examine the repertoires of cross-disciplinary knowledge that literacy learners need to produce…

  17. Connecting to Community: Best Practices for Designing a Digital Branch

    Science.gov (United States)

    Bird, Nora J.; Pampaloni, Andrea M.

    2014-01-01

    In this article the authors provide an overview of the concept of a digital branch library and the manner in which it can be used to enhance academic library community engagement. As the front door to the branch, the library's Website is key to going beyond service provision toward sustaining relationships with faculty, students, staff, and…

  18. AN ITERATIVE ALGORITHM FOR OPTIMAL DESIGN OF NON-FREQUENCY-SELECTIVE FIR DIGITAL FILTERS

    Institute of Scientific and Technical Information of China (English)

    Duan Miyi; Sun Chunlai; Liu Xin; Tian Xinguang

    2008-01-01

    This paper proposes a novel iterative algorithm for optimal design of non-frequency-se-lective Finite Impulse Response (FIR) digital filters based on the windowing method. Different from the traditional optimization concept of adjusting the window or the filter order in the windowing design of an FIR digital filter,the key idea of the algorithm is minimizing the approximation error by succes-sively modifying the design result through an iterative procedure under the condition of a fixed window length. In the iterative procedure,the known deviation of the designed frequency response in each iteration from the ideal frequency response is used as a reference for the next iteration. Because the approximation error can be specified variably,the algorithm is applicable for the design of FIR digital filters with different technical requirements in the frequency domain. A design example is employed to illustrate the efficiency of the algorithm.

  19. A Web-Based Visualization and Animation Platform for Digital Logic Design

    Science.gov (United States)

    Shoufan, Abdulhadi; Lu, Zheng; Huss, Sorin A.

    2015-01-01

    This paper presents a web-based education platform for the visualization and animation of the digital logic design process. This includes the design of combinatorial circuits using logic gates, multiplexers, decoders, and look-up-tables as well as the design of finite state machines. Various configurations of finite state machines can be selected…

  20. Developing digital technologies for university mathematics by applying participatory design methods

    DEFF Research Database (Denmark)

    Triantafyllou, Eva; Timcenko, Olga

    2013-01-01

    This paper presents our research efforts to develop digital technologies for undergraduate university mathematics. We employ participatory design methods in order to involve teachers and students in the design of such technologies. The results of the first round of our design are included...

  1. Managing Increasing Complexity in Undergraduate Digital Media Design Education: The Impact and Benefits of Multidisciplinary Collaboration

    Science.gov (United States)

    Fleischmann, Katja; Daniel, Ryan

    2013-01-01

    Increasing complexity is one of the most pertinent issues when discussing the role and future of design, designers and their education. The evolving nature of digital media technology has resulted in a profession in a state of flux with increasingly complex communication and design problems. The ability to collaborate and interact with other…

  2. Establishment of a Digital Knowledge Conversion Architecture Design Learning with High User Acceptance

    Science.gov (United States)

    Wu, Yun-Wu; Weng, Apollo; Weng, Kuo-Hua

    2017-01-01

    The purpose of this study is to design a knowledge conversion and management digital learning system for architecture design learning, helping students to share, extract, use and create their design knowledge through web-based interactive activities based on socialization, internalization, combination and externalization process in addition to…

  3. Educating the Reflective Educator: Design Processes and Digital Fabrication for the Classroom

    DEFF Research Database (Denmark)

    Hjorth, Mikkel; Smith, Rachel Charlotte; Iversen, Ole Sejer;

    2016-01-01

    Design thinking and digital technologies are increasingly introduced in education to develop children’s design literacy. This shift demands a change in teachers’ mindsets, capabilities and approaches to design and technology as well as new teaching practices. This paper reports on a research...

  4. Application of multirate digital filter banks to wideband all-digital phase-locked loops design

    Science.gov (United States)

    Sadr, Ramin; Shah, Biren; Hinedi, Sami

    1993-01-01

    A new class of architecture for all-digital phase-locked loops (DPLL's) is presented in this article. These architectures, referred to as parallel DPLL (PDPLL), employ multirate digital filter banks (DFB's) to track signals with a lower processing rate than the Nyquist rate, without reducing the input (Nyquist) bandwidth. The PDPLL basically trades complexity for hardware-processing speed by introducing parallel processing in the receiver. It is demonstrated here that the DPLL performance is identical to that of a PDPLL for both steady-state and transient behavior. A test signal with a time-varying Doppler characteristic is used to compare the performance of both the DPLL and the PDPLL.

  5. Hidden History: A Mobile Application for Discovering Surrounding Landscapes

    OpenAIRE

    2016-01-01

    This thesis work describes the design, development and evaluation of a mobile application called Hidden History. This application lets users discover and explore three types of landscapes (Historic, Scenic and Cultural) using three different modes of discovery (Route, Explore and Tour). Before designing Hidden History, the feature set of other applications that help users explore surrounding landscapes were identified and analyzed. Hidden History was then designed to implement the best fea...

  6. Monobit Digital Receivers for QPSK: Design, Analysis and Performance

    CERN Document Server

    Wang, Zhiyong; Zhang, Wenyi; Wei, Guo

    2012-01-01

    Future communication system requires large bandwidth to achieve high data rate up to multigigabit/ sec, which makes analog-to-digital (ADC) become a key bottleneck for the implementation of digital receivers due to its high complexity and large power consumption. Therefore, monobit receivers for BPSK have been proposed to address this problem. In this work, QPSK modulation is considered for higher data rate. First, the optimal receiver based on monobit ADC with Nyquist sampling is derived, and its corresponding performance in the form of deflection ratio is calculated. Then a suboptimal but more practical monobit receiver is obtained, along with iterative demodulation and small sample removal. The effect of the imbalances between the In-phase (I) and Quadrature-phase (Q) branches, including the amplitude and phase imbalances, is carefully investigated too. To combat the performance loss caused by IQ imbalances, monobit receivers based on double training sequences are proposed. Numerical simulations show that ...

  7. NSTX-U Digital Coil Protection System Software Detailed Design

    Energy Technology Data Exchange (ETDEWEB)

    None

    2014-06-01

    The National Spherical Torus Experiment (NSTX) currently uses a collection of analog signal processing solutions for coil protection. Part of the NSTX Upgrade (NSTX-U) entails replacing these analog systems with a software solution running on a conventional computing platform. The new Digital Coil Protection System (DCPS) will replace the old systems entirely, while also providing an extensible framework that allows adding new functionality as desired.

  8. Digital coherent transceiver for optical communications: from design to implementation

    OpenAIRE

    Anzuola Valencia, Esdras

    2012-01-01

    Establishing the basis of optical coherent transmission and detection which exploit digital signal processing (DSP) to optimize the performance of optical communication systems. [ANGLÈS] In this project we analyze the theoretical models of optical coherent communication systems as well as the front-end arquitectures used to implement them. Key concepts as balanced photo detection and quantum limit are explained and studied. Complex modulation schemes maximize spectral efficiency and power ...

  9. Research on Digital Models for Product Design and Manufacture

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    CAD/CAM integrate technology has been drawn to much a ttention and becomes one of the focus of the international academic and commerci al research, Through efforts nearly 10 years, remarkable progress has been made in the 3-dimension feature parametric modeling. UG, SOLIDWORK and MDT apply the se technology with respective features. However, no distinct development has bee n made in the digital models from geometric feature to manufacture feature. Prod uct information expression and the basic model frame ...

  10. Design of Low Pass Digital FIR Filter Using Cuckoo Search Algorithm

    OpenAIRE

    Taranjit Singh; Harvinder Singh Josan

    2014-01-01

    This paper presents a novel approach of designing linear phase FIR low pass filter using cuckoo Search Algorithm (CSA). FIR filter design is a multi-modal optimization problem. The conventional optimization techniques are not efficient for digital filter design. An iterative method is introduced to find the best solution of FIR filter design problem.Flat passband and high stopband attenuation are the major characteristics required in FIR filter design. To achieve these charact...

  11. Wireless receiver architectures and design antennas, RF, synthesizers, mixed signal, and digital signal processing

    CERN Document Server

    Rouphael, Tony J

    2014-01-01

    Wireless Receiver Architectures and Design presents the various designs and architectures of wireless receivers in the context of modern multi-mode and multi-standard devices. This one-stop reference and guide to designing low-cost low-power multi-mode, multi-standard receivers treats analog and digital signal processing simultaneously, with equal detail given to the chosen architecture and modulating waveform. It provides a complete understanding of the receiver's analog front end and the digital backend, and how each affects the other. The book explains the design process in great detail, s

  12. Design and realization of digital audio equalizer based on MCU and FPAA

    Institute of Scientific and Technical Information of China (English)

    Zhou Ping; Liu Zhuo; Xia Liang

    2008-01-01

    In analog audio equalizer, the filters are constructed by op-amplifiers and discrete components. Being influenced by its discrete capabilities, audio equalizer has many disadvantages. Meanwhile, pure digital audio equalizer has got better performance and stability, but its cost and price are too high. So digital audio equalizer only has its application in upscale domain. A new design method for audio equalizer is proposed, which attempts to design and realize a high precision and high SNR (signal noise ratio) digital audio equalizer system based on field programmable analog array (FPAA) and micro-controller unit. This design confirms that design speed and performance will be greatly enhanced when FPAA technology is applied to analog design domain.

  13. Collective interaction by design collective controllers for social navigation on digital photos

    DEFF Research Database (Denmark)

    Petersen, Marianne Graves; Krogh, Peter; Mortensen, Morten Boye;

    2010-01-01

    This paper seeks to attract attention to the possibilities for designing for collaborative control and social negotiation in everyday interaction design. This work is starts out from the interaction model of collective interaction, which is a model depicting strong social connection between people...... interacting on a shared digital material with a shared goal. We adopt a research through design approach where we develop an exemplar collective interaction prototype for collective exploration of digital photos in the home and we evaluate the prototype in use. The exemplar prototype and experiences from...... trial use serves to refine the collective interaction model and identify qualities and shortcommings of collective interaction applications. In this way we wish to point to a design space, which can lead to new interaction techniques and -designs supporting shared social experiences around digital...

  14. ShearLab: A Rational Design of a Digital Parabolic Scaling Algorithm

    CERN Document Server

    Kutyniok, Gitta; Zhuang, Xiaosheng

    2011-01-01

    Multivariate problems are typically governed by anisotropic features such as edges in images. A common bracket of most of the various directional representation systems which have been proposed to deliver sparse approximations of such features is the utilization of parabolic scaling. One prominent example is the shearlet system. Our objective in this paper is three-fold: We firstly develop a digital shearlet theory which is rationally designed in the sense that it is the digitization of the existing shearlet theory for continuous data. This implicates that shearlet theory provides a unified treatment of both the continuum and digital realm. Secondly, we analyze the utilization of pseudo-polar grids and the pseudo-polar Fourier transform for digital implementations of parabolic scaling algorithms. We derive an isometric pseudo-polar Fourier transform by careful weighting of the pseudo-polar grid, allowing exploitation of its adjoint for the inverse transform. This leads to a digital implementation of the shear...

  15. Data Collection for Mental Health Studies Through Digital Platforms: Requirements and Design of a Prototype.

    Science.gov (United States)

    Aledavood, Talayeh; Triana Hoyos, Ana Maria; Alakörkkö, Tuomas; Kaski, Kimmo; Saramäki, Jari; Isometsä, Erkki; Darst, Richard K

    2017-06-09

    Mental and behavioral disorders are the main cause of disability worldwide. However, their diagnosis is challenging due to a lack of reliable biomarkers; current detection is based on structured clinical interviews which can be biased by the patient's recall ability, affective state, changing in temporal frames, etc. While digital platforms have been introduced as a possible solution to this complex problem, there is little evidence on the extent of usability and usefulness of these platforms. Therefore, more studies where digital data is collected in larger scales are needed to collect scientific evidence on the capacities of these platforms. Most of the existing platforms for digital psychiatry studies are designed as monolithic systems for a certain type of study; publications from these studies focus on their results, rather than the design features of the data collection platform. Inevitably, more tools and platforms will emerge in the near future to fulfill the need for digital data collection for psychiatry. Currently little knowledge is available from existing digital platforms for future data collection platforms to build upon. The objective of this work was to identify the most important features for designing a digital platform for data collection for mental health studies, and to demonstrate a prototype platform that we built based on these design features. We worked closely in a multidisciplinary collaboration with psychiatrists, software developers, and data scientists and identified the key features which could guarantee short-term and long-term stability and usefulness of the platform from the designing stage to data collection and analysis of collected data. The key design features that we identified were flexibility of access control, flexibility of data sources, and first-order privacy protection. We also designed the prototype platform Non-Intrusive Individual Monitoring Architecture (Niima), where we implemented these key design features. We

  16. Integrated source and channel encoded digital communications system design study

    Science.gov (United States)

    Huth, G. K.

    1974-01-01

    Studies on the digital communication system for the direct communication links from ground to space shuttle and the links involving the Tracking and Data Relay Satellite (TDRS). Three main tasks were performed:(1) Channel encoding/decoding parameter optimization for forward and reverse TDRS links,(2)integration of command encoding/decoding and channel encoding/decoding; and (3) modulation coding interface study. The general communication environment is presented to provide the necessary background for the tasks and to provide an understanding of the implications of the results of the studies.

  17. Design and Optimization of Fast Switching Valves for Large Scale Digital Hydraulic Motors

    DEFF Research Database (Denmark)

    Roemer, Daniel Beck

    of seat valves suitable for large scale digital hydraulic motors and detailed analysis methods for the pressure chambers of such machines. In addition, modeling methods of seat valves within this field have been developed, and a design method utilizing these models including optimization of subdomains has......The present thesis is on the design, analysis and optimization of fast switching valves for digital hydraulic motors with high power ratings. The need for such high power motors origins in the potential use of hydrostatic transmissions in wind turbine drive trains, as digital hydraulic machines...... have been shown to improve the overall efficiency and efficient operation range compared to traditional hydraulic machines. Digital hydraulic motors uses electronically controlled independent seat valves connected to the pressure chambers, which must be fast acting and exhibit low pressure losses...

  18. A Framework for Interactive Work Design based on Digital Work Analysis and Simulation

    CERN Document Server

    Ma, Liang; Fu, Huanzhang; Guo, Yang; Chablat, Damien; Bennis, Fouad; 10.1002/hfm.20178

    2010-01-01

    Due to the flexibility and adaptability of human, manual handling work is still very important in industry, especially for assembly and maintenance work. Well-designed work operation can improve work efficiency and quality; enhance safety, and lower cost. Most traditional methods for work system analysis need physical mock-up and are time consuming. Digital mockup (DMU) and digital human modeling (DHM) techniques have been developed to assist ergonomic design and evaluation for a specific worker population (e.g. 95 percentile); however, the operation adaptability and adjustability for a specific individual are not considered enough. In this study, a new framework based on motion tracking technique and digital human simulation technique is proposed for motion-time analysis of manual operations. A motion tracking system is used to track a worker's operation while he/she is conducting a manual handling work. The motion data is transferred to a simulation computer for real time digital human simulation. The data ...

  19. A Simple Instrument Designed to Provide Consistent Digital Facial Images in Dermatology

    OpenAIRE

    Balakrishnan Nirmal; Pai, Sathish B.; Handattu Sripathi

    2013-01-01

    Photography has proven to be a valuable tool in the field of dermatology. The major reason for poor photographs is the inability to produce comparable images in the subsequent follow ups. Combining digital photography with image processing software analysis brings consistency in tracking serial images. Digital photographs were taken with the aid of an instrument which we designed in our workshop to ensure that photographs were taken with identical patient positioning, camera angles and distan...

  20. New approach to the design of digital algorithms for electric power measurements

    Energy Technology Data Exchange (ETDEWEB)

    Kezunovic, M. (Texas A and M Univ., TX (US)); Perunicic, B. (Univ. of Sarajevo (YU))

    1991-04-01

    This paper introduces a new approach to the design of digital algorithms for electric power measurements. Digital algorithms for electric power measurements are represented as 2D digital FIR filters applied on voltage and current samples. Based on this approach, a new technique for algorithm design is developed. As the main advantage, the technique provides a convenient way to design new algorithms for measuring the electric power components according to various definitions in both sinusoidal and non-sinusoidal conditions. Several new algorithms are derived by using the proposed design technique. The existing algorithms for power measurements are also derived by using the new approach. The algorithm performance is tested using actual signal recordings.

  1. Teachers’ Pedagogic Design of Digital Interactive Whiteboard Materials in the UK Secondary School

    Directory of Open Access Journals (Sweden)

    Carey Jewitt

    2008-03-01

    Full Text Available Teachers have always made texts for use in the classroom. The wide spread introduction of Interactive whiteboard (IWB technology into UK classrooms, and the screen more generally, makes the multimodal resources of color, image, dynamic movement, and sound newly available for pedagogic design in newly connectable ways. These facilities present teachers with new questions about how to design and use teaching materials, new possibilites and constraints. This presentation will examine teachers' design of digital multimodal resources for IWBs and the influence of prevalent policy discourses of interactivity, multimodality and fast pace influence on teacher’s digital materials for the IWB.

  2. Public design of digital commons in urban places: a case study

    DEFF Research Database (Denmark)

    Teli, Maurizio; Bordin, Silvia; Menendez Blanco, Maria

    2016-01-01

    This paper can be framed within the growing interest in the public dimension of technology design: it proposes a framework for the public design of urban technologies by elaborating on the concepts of digital commons, matters of concerns and engagement. The framework is discussed through the case...... study of a mobility application developed within a wider project of digital commons design. We contrast a Smart City approach and a urban computing one, and we argue that the latter is more fruitful in the long run, since it entails elements for the establishment of forms of recursive engagement...

  3. Design and Implementation of Digital Linear Control Systems on Reconfigurable Hardware

    Directory of Open Access Journals (Sweden)

    Marcus Bednara

    2003-05-01

    Full Text Available The implementation of large linear control systems requires a high amount of digital signal processing. Here, we show that reconfigurable hardware allows the design of fast yet flexible control systems. After discussing the basic concepts for the design and implementation of digital controllers for mechatronic systems, a new general and automated design flow starting from a system of differential equations to application-specific hardware implementation is presented. The advances of reconfigurable hardware as a target technology for linear controllers is discussed. In a case study, we compare the new hardware approach for implementing linear controllers with a software implementation.

  4. Partially Hidden Markov Models

    DEFF Research Database (Denmark)

    Forchhammer, Søren Otto; Rissanen, Jorma

    1996-01-01

    Partially Hidden Markov Models (PHMM) are introduced. They differ from the ordinary HMM's in that both the transition probabilities of the hidden states and the output probabilities are conditioned on past observations. As an illustration they are applied to black and white image compression wher...

  5. Adobe InDesign CS6 digital classroom

    CERN Document Server

    Smith, Christopher

    2012-01-01

    Expert book-and-video package helps you conquer Adobe InDesign CS6 Whether you want to create sophisticated page layouts for print or electronic books or produce dazzling brochures and other publications, chances are Adobe InDesign is the design and page layout tool you'll call upon. Now you can enhance your creativity and discover all the ways to use Adobe InDesign with this book-and-DVD training package. Thirteen self-paced lessons teach you how to design, produce, and develop streamlined workflows for page layout. Each lesson is accompanied by a video tutorial that clearly demonstrates

  6. Literary and Historical 3D Digital Game-Based Learning: Design Guidelines

    Science.gov (United States)

    Neville, David O.; Shelton, Brett E.

    2010-01-01

    As 3D digital game-based learning (3D-DGBL) for the teaching of literature and history gradually gains acceptance, important questions will need to be asked regarding its method of design, development, and deployment. This article offers a synthesis of contemporary pedagogical, instructional design, new media, and literary-historical theories to…

  7. Digital Learning Resources in Higher Education: Designing for Large-scale Use

    NARCIS (Netherlands)

    Hartog, R.J.M.; Beulens, A.J.M.; Tramper, H.

    2012-01-01

    In a series of faculty-based projects on design, realization, implementation, use and evaluation of digital learning resources for higher education, many design requirements emerged and were evaluated. This paper focuses on those requirements that are related with large-scale use. It is argued that

  8. The HIGHLEAD program: locating and designing highlead harvest units by using digital terrain models.

    Science.gov (United States)

    R.H. Twito; S.E. Reutebuch; R.J. McGaughey

    1988-01-01

    PLANS, a software package for integrated timber-harvest planning, uses digital terrain models to provide the topographic data needed to fit harvest and transportation designs to specific terrain. HIGHLEAD, an integral program in the PLANS package, is used to design the timber-harvest units to be yarded by highlead systems. It solves for the yarding limits of direct...

  9. Reformation Design of Training. A Handbook with a Behavioral Digital Approach.

    Science.gov (United States)

    Hamdan, Mohamed Ziad

    This handbook, which presents a design-based approach to training, leads training professionals through a process for developing employee training programs based on a behavioral digital approach. (The design approach is a scientific methodology built on three principles: the systematization, behaviorism, and quantification of training.) The…

  10. Literary and Historical 3D Digital Game-Based Learning: Design Guidelines

    Science.gov (United States)

    Neville, David O.; Shelton, Brett E.

    2010-01-01

    As 3D digital game-based learning (3D-DGBL) for the teaching of literature and history gradually gains acceptance, important questions will need to be asked regarding its method of design, development, and deployment. This article offers a synthesis of contemporary pedagogical, instructional design, new media, and literary-historical theories to…

  11. Design of minimum multiplier fractional order differentiator based on lattice wave digital filter.

    Science.gov (United States)

    Barsainya, Richa; Rawat, Tarun Kumar; Kumar, Manjeet

    2017-01-01

    In this paper, a novel design of fractional order differentiator (FOD) based on lattice wave digital filter (LWDF) is proposed which requires minimum number of multiplier for its structural realization. Firstly, the FOD design problem is formulated as an optimization problem using the transfer function of lattice wave digital filter. Then, three optimization algorithms, namely, genetic algorithm (GA), particle swarm optimization (PSO) and cuckoo search algorithm (CSA) are applied to determine the optimal LWDF coefficients. The realization of FOD using LWD structure increases the design accuracy, as only N number of coefficients are to be optimized for Nth order FOD. Finally, two design examples of 3rd and 5th order lattice wave digital fractional order differentiator (LWDFOD) are demonstrated to justify the design accuracy. The performance analysis of the proposed design is carried out based on magnitude response, absolute magnitude error (dB), root mean square (RMS) magnitude error, arithmetic complexity, convergence profile and computation time. Simulation results are attained to show the comparison of the proposed LWDFOD with the published works and it is observed that an improvement of 29% is obtained in the proposed design. The proposed LWDFOD approximates the ideal FOD and surpasses the existing ones reasonably well in mid and high frequency range, thereby making the proposed LWDFOD a promising technique for the design of digital FODs. Copyright © 2016 ISA. Published by Elsevier Ltd. All rights reserved.

  12. Design of Digital IIR Filter with Conflicting Objectives Using Hybrid Gravitational Search Algorithm

    Directory of Open Access Journals (Sweden)

    D. S. Sidhu

    2015-01-01

    Full Text Available In the recent years, the digital IIR filter design as a single objective optimization problem using evolutionary algorithms has gained much attention. In this paper, the digital IIR filter design is treated as a multiobjective problem by minimizing the magnitude response error, linear phase response error and optimal order simultaneously along with meeting the stability criterion. Hybrid gravitational search algorithm (HGSA has been applied to design the digital IIR filter. GSA technique is hybridized with binary successive approximation (BSA based evolutionary search method for exploring the search space locally. The relative performance of GSA and hybrid GSA has been evaluated by applying these techniques to standard mathematical test functions. The above proposed hybrid search techniques have been applied effectively to solve the multiparameter and multiobjective optimization problem of low-pass (LP, high-pass (HP, band-pass (BP, and band-stop (BS digital IIR filter design. The obtained results reveal that the proposed technique performs better than other algorithms applied by other researchers for the design of digital IIR filter with conflicting objectives.

  13. Design of Semi-Adaptive 190-200 KHz Digital Band Pass Filters for SAR Applications

    Directory of Open Access Journals (Sweden)

    P Yadav

    2013-04-01

    Full Text Available Technologies have advanced rapidly in the field of digital signal processing due to advances made in high speed, low cost digital integrated chips. These technologies have further stimulated ever increasing use of signal representation in digital form for purposes of transmission, measurement, control and storage. Design of digital filters especially adaptive or semi adaptive is the necessity of the hour for SAR applications. The aim of this research work is to design and performance evaluation of 380-400 KHz Bartlett, Blackman and Chebyshev digital semi adaptive filters. For this work XILINX and MATLAB softwares were used for the design. As pert of practical research work these designs were translated using FPGA hardware SPARTAN-3E kit. These were optimized, analyzed, compared and evaluated keeping the sampling frequency at 5 MHz for 64 order. Both these filters designed using software and hardware were tested by passing a sinusoidal test signal of 381 KHz along with noise and the filtered output signals are presented.

  14. Optimal design study of high order FIR digital filters based on neural network algorithm

    Institute of Scientific and Technical Information of China (English)

    王小华; 何怡刚

    2004-01-01

    An optimal design approach of high order FIR digital filter is developed based on the algorithm of neural networks with cosine basis function . The main idea is to minimize the sum of the square errors between the amplitude response of the desired FIR filter and that of the designed by training the weights of neural networks, then obtains the impulse response of FIR digital filter . The convergence theorem of the neural networks algorithm is presented and proved,and the optimal design method is introduced by designing four kinds of FIR digital filters , i.e., low-pass, high-pass,bandpass , and band-stop FIR digital filter. The results of the amplitude responses show that attenuation in stop-bands is more than 60 dB with no ripple and pulse existing in pass-bands, and cutoff frequency of passband and stop-band is easily controlled precisely . The presented optimal design approach of high order FIR digital filter is significantly effective.

  15. Research on methods of designing and building digital seabed database

    Institute of Scientific and Technical Information of China (English)

    Su Tianyun; Liu Baohua; Zhai Shikui; Liang Ruicai; Zheng Yanpeng; Fu Qiang

    2007-01-01

    With a review of the recent development in digitalization and application of seabed data , this paper systematically proposed methods for integrating seabed data by analyzing its feature based on ORACLE database management system and advanced techniques of spatial data management. We did research on storage structure of seabed data, distributed- integrated database system, standardized spatial database and seabed metadata management system in order to effectively manage and use these seabed information in practical application . Finally , we applied the methods researched and proposed in this paper to build the Bohai Sea engineering geology database that stores engineering geology data and other seabed information from the Bohai Sea area . As a result , the Bohai Sea engineering geology database can effectively integrate huge amount of distributed and complicated seabed data to meet the practical requisition of Bohai Sea engineering geology environment exploration and exploitation.

  16. Context dependent digital shape editing in product design

    NARCIS (Netherlands)

    Dumitrescu, R.

    2007-01-01

    The present CAID systems insufficiently support designers with effective and intuitive tools for shape modelling. Designers' efficiency significantly decreases when shape alterations are performed. The research described in this thesis deals with the development of a methodology to support more effe

  17. Designed and Accidental Humor in the Smart Digital Wild

    NARCIS (Netherlands)

    Nijholt, Anton; Ruiz Miyares, L.

    2017-01-01

    Humor can be designed and canned, for example as it appears in videogames, sitcoms or amusement parks. We often have humor professionals that have responsibility for this inclusion of humor. Humor can be designed for a particular occasion, for example in an April prank. However, in real life we ofte

  18. Design and development of a digital farmer field school. Experiences with a digital learning environment for cocoa production and certification in Sierra Leone

    NARCIS (Netherlands)

    Witteveen, Loes; Lie, Rico; Goris, Margriet; Ingram, Verina

    2017-01-01

    This article reports on the design and development of the Digital Farmer Field School (DFFS). The DFFS offers a tablet-based digital learning environment for farmers and extension agents for knowledge sharing and knowledge co-creation. It provides an alternative to conventional agricultural exten

  19. Hybrid Placemaking in the Library: Designing Digital Technology to Enhance Users' On-Site Experience

    Science.gov (United States)

    Bilandzic, Mark; Johnson, Daniel

    2013-01-01

    This paper presents research findings and design strategies that illustrate how digital technology can be applied as a tool for "hybrid" placemaking in ways that would not be possible in purely digital or physical spaces. Digital technology has revolutionised the way people learn and gather new information. This trend has challenged the…

  20. Digital Control Analysis and Design of a Field-Sensed Magnetic Suspension System

    Directory of Open Access Journals (Sweden)

    Jen-Hsing Li

    2015-03-01

    Full Text Available Magnetic suspension systems are mechatronic systems and crucial in several engineering applications, such as the levitation of high-speed trains, frictionless bearings, and wind tunnels. Magnetic suspension systems are nonlinear and unstable systems; therefore, they are suitable educational benchmarks for testing various modeling and control methods. This paper presents the digital modeling and control of magnetic suspension systems. First, the magnetic suspension system is stabilized using a digital proportional-derivative controller. Subsequently, the digital model is identified using recursive algorithms. Finally, a digital mixed linear quadratic regulator (LQR/H∞ control is adopted to stabilize the magnetic suspension system robustly. Simulation examples and a real-world example are provided to demonstrate the practicality of the study results. In this study, a digital magnetic suspension system model was developed and reviewed. In addition, equivalent state and output feedback controls for magnetic suspension systems were developed. Using this method, the controller design for magnetic suspension systems was simplified, which is the novel contribution of this study. In addition, this paper proposes a complete digital controller design procedure for magnetic suspension systems.

  1. Digital control analysis and design of a field-sensed magnetic suspension system.

    Science.gov (United States)

    Li, Jen-Hsing; Chiou, Juing-Shian

    2015-03-13

    Magnetic suspension systems are mechatronic systems and crucial in several engineering applications, such as the levitation of high-speed trains, frictionless bearings, and wind tunnels. Magnetic suspension systems are nonlinear and unstable systems; therefore, they are suitable educational benchmarks for testing various modeling and control methods. This paper presents the digital modeling and control of magnetic suspension systems. First, the magnetic suspension system is stabilized using a digital proportional-derivative controller. Subsequently, the digital model is identified using recursive algorithms. Finally, a digital mixed linear quadratic regulator (LQR)/H∞ control is adopted to stabilize the magnetic suspension system robustly. Simulation examples and a real-world example are provided to demonstrate the practicality of the study results. In this study, a digital magnetic suspension system model was developed and reviewed. In addition, equivalent state and output feedback controls for magnetic suspension systems were developed. Using this method, the controller design for magnetic suspension systems was simplified, which is the novel contribution of this study. In addition, this paper proposes a complete digital controller design procedure for magnetic suspension systems.

  2. Design, implementation and analysis of fully digital 1-D controllable multiscroll chaos

    KAUST Repository

    Mansingka, Abhinav S.

    2011-12-01

    This paper introduces the fully digital implementation of a 1-D multiscroll chaos generator based on a staircase nonlinearity in the 3rd-order jerk system using the Euler approximation. For the first time, digital design is exploited to provide real-time controllability of (i) number of scrolls, (ii) position in 1-D space, (iii) Euler step size and (iv) system parameter. The effect of variations in these fields on the maximum Lyapunov exponent (MLE) is analyzed. The system is implemented using Verilog HDL and synthesized on an Xilinx Virtex 4 FPGA, exhibiting area utilization less than 3.5% and high performance with experimentally verified throughput up to 3.33 Gbits/s. This fully digital system enables applications in modulation schemes and chaos-based cryptosystems without analog to digital conversion. © 2011 IEEE.

  3. Digital Picture Production and Picture aesthetic Competency in It-didactic Design

    DEFF Research Database (Denmark)

    Rasmussen, Helle

    In my presentation at the InSEA Conference 2015 I want to introduce my ongoing Ph.D. project with the title ‘Digital Picture Production and Picture aesthetic Competency in It-didactic Design’. The objective of the project is to provide a basis for upgrading and renewal of lessons in the school...... subject Visual Arts – and crosswise of subjects in school. The overall research question has been: How can IT-didactic designs support lessons in production of complex meaning in digital pictures and increase the development of pupil’s picture aesthetic competences? By using the expression ‘complex...... potential in digital picture productions will tend to be distinctly complex, such as also Mie Buhl has pointed with reference to Paul Duncum. (Buhl 2005, Duncum 2014). To handle production of such distinctly complex meaning in digital pictures seems to be a didactic challenge in school. It also seems like...

  4. Digital geometry processing applied in customized medical implant design.

    Science.gov (United States)

    Xiao-Feng, Zhu; Cheng-Tao, Wang

    2005-01-01

    Standard medical implants are used in most implantation cases, but in some special cases, only those implants conforming to individual patient's skeletal morphology can serve the purpose. This paper proposes a new approach to design and fabricate customized exact-fit medical implants. With a real surgical case as the example, technical design details are presented; and two algorithms are given respectively for segmentation based on object features and triangular mesh defragmentation.

  5. Information Architecture the Design of Digital Information Spaces

    CERN Document Server

    Ding, Wei

    2009-01-01

    Information Architecture is about organizing and simplifying information, designing and integrating information spaces/systems, and creating ways for people to find and interact with information content. Its goal is to help people understand and manage information and make right decisions accordingly. In the ever-changing social, organizational and technological contexts, Information Architects not only design individual information spaces (e.g., individual websites, software applications, and mobile devices), but also tackle strategic aggregation and integration of multiple information spaces

  6. Digital flight control software design requirements. [for space shuttle orbiter

    Science.gov (United States)

    1973-01-01

    The objective of the integrated digital flight control system is to provide rotational and translational control of the space shuttle orbiter in all phases of flight: from launch ascent through orbit to entry and touchdown, and during powered horizontal flights. The program provides a versatile control system structure while maintaining uniform communications with other programs, sensors, and control effects by using an executive routine/function subroutine format. The program reads all external variables at a single point, copies them into its dedicated storage, and then calls the required subroutines in the proper sequence. As a result, the flight control program is largely independent of other programs in the GN and C computer complex and is equally insensitive to the characteristics of the processor configuration. The integrated structure of the control system and the DFCS executive routine which embodies that structure are described. The specific estimation and control algorithms used in the various mission phases are shown. Attitude maneuver routines that interface with the DFCS are also described.

  7. HIDDEN WEB EXTRACTOR DYNAMIC WAY TO UNCOVER THE DEEP WEB

    Directory of Open Access Journals (Sweden)

    DR. ANURADHA

    2012-06-01

    Full Text Available In this era of digital tsunami of information on the web, everyone is completely dependent on the WWW for information retrieval. This has posed a challenging problem in extracting relevant data. Traditional web crawlers focus only on the surface web while the deep web keeps expanding behind the scene. The web databases are hidden behind the query interfaces. In this paper, we propose a Hidden Web Extractor (HWE that can automatically discover and download data from the Hidden Web databases. Since the only “entry point” to a Hidden Web site is a query interface, the main challenge that a Hidden WebExtractor has to face is how to automatically generate meaningful queries for the unlimited number of website pages.

  8. [Digital smile design and anterior monolithic restorations chair side fabrication with Cerec Cad/Cam system].

    Science.gov (United States)

    Perez-Davidi, M

    2015-10-01

    Digital dentistry and digital smile design are both components of modern dentistry. The combination of the two enables the dentist to simulate the desired outcome, share the mock up with the patient and coordinate his or her expectations with the probable esthetic outcome. In this article a case is presented of anterior restorations performed to improve the smile and esthetics of the patient, combining the digital smile design (by Christian Coachman) and the Avatar Digital smile aide of the Cerec SW4 (sirona Germany) software for designing and the MCxI inlab milling unit for the fabrication. The patients picture was imported into the software and the model of the teeth was super imposed into the 3d picture of the face enabling positioning the incisal edge and midline in the desired place and sharing the virtual demo with the patient. All this procedure was performed after the patient had a mockup session in the mouth done according to the wax up procedure. The mockup can be scanned in the mouth and added as a protocol to the patient's digital models, to be used later in the biogeneric copy option. Using this option the software uses the outline of the mockup as guide lins for the final restoration computerized proposal. It is still an aide tool to be improved and simplified but definitely it is the present and future of chair side prosthodontics.

  9. Digital Natives and Digital Media in the College Classroom: Assignment Design and Impacts on Student Learning

    Science.gov (United States)

    Watson, Joseph A.; Pecchioni, Loretta L.

    2011-01-01

    The use of multimodal learning techniques is becoming more widespread, however, the pedagogical discourse surrounding its implementation into classroom and course design is complicated as these technologies are either demonized or viewed as the panacea for curriculum ills. Educators are faced with unique challenges when investigating how to…

  10. A Design Study Investigating Augmented Reality and Photograph Annotation in a Digitalized Grossing Workstation.

    Science.gov (United States)

    Chow, Joyce A; Törnros, Martin E; Waltersson, Marie; Richard, Helen; Kusoffsky, Madeleine; Lundström, Claes F; Kurti, Arianit

    2017-01-01

    Within digital pathology, digitalization of the grossing procedure has been relatively underexplored in comparison to digitalization of pathology slides. Our investigation focuses on the interaction design of an augmented reality gross pathology workstation and refining the interface so that information and visualizations are easily recorded and displayed in a thoughtful view. The work in this project occurred in two phases: the first phase focused on implementation of an augmented reality grossing workstation prototype while the second phase focused on the implementation of an incremental prototype in parallel with a deeper design study. Our research institute focused on an experimental and "designerly" approach to create a digital gross pathology prototype as opposed to focusing on developing a system for immediate clinical deployment. Evaluation has not been limited to user tests and interviews, but rather key insights were uncovered through design methods such as "rapid ethnography" and "conversation with materials". We developed an augmented reality enhanced digital grossing station prototype to assist pathology technicians in capturing data during examination. The prototype uses a magnetically tracked scalpel to annotate planned cuts and dimensions onto photographs taken of the work surface. This article focuses on the use of qualitative design methods to evaluate and refine the prototype. Our aims were to build on the strengths of the prototype's technology, improve the ergonomics of the digital/physical workstation by considering numerous alternative design directions, and to consider the effects of digitalization on personnel and the pathology diagnostics information flow from a wider perspective. A proposed interface design allows the pathology technician to place images in relation to its orientation, annotate directly on the image, and create linked information. The augmented reality magnetically tracked scalpel reduces tool switching though limitations

  11. Integrated source and channel encoded digital communication system design study

    Science.gov (United States)

    Alem, W. K.; Huth, G. K.; Simon, M. K.

    1978-01-01

    The particular Ku-band carrier, PN despreading, and symbol synchronization strategies, which were selected for implementation in the Ku-band transponder aboard the orbiter, were assessed and evaluated from a systems performance viewpoint, verifying that system specifications were met. A study was performed of the design and implementation of tracking techniques which are suitable for incorporation into the Orbiter Ku-band communication system. Emphasis was placed on maximizing tracking accuracy and communication system flexibility while minimizing cost, weight, and system complexity of Orbiter and ground systems hardware. The payload communication study assessed the design and performance of the forward link and return link bent-pipe relay modes for attached and detached payloads. As part of this study, a design for a forward link bent-pipe was proposed which employs a residual carrier but which is tracked by the existing Costas loop.

  12. Digital design and communication tools for sustainable development

    Energy Technology Data Exchange (ETDEWEB)

    Totten, M.

    1995-12-31

    Within the computer and communications industry there is a strong sentiment that the speed and power of mainframe computers will be available at personal computer sizes and prices in the next few years. Coinciding with this is the expectation that large data/information/knowledge resource pools will be available online for download. This paper summarizes what is available now and what is coming in the future in computer technologies. Then the author talks the opportunities in `green` building design for energy efficiency and conservation and the type of design tools which will be coming in the future.

  13. Design of Digital Synthesis Filters for Hybrid Filter Bank A/D Converters Using Semidefinite Programming

    Directory of Open Access Journals (Sweden)

    Wei Wang

    2014-05-01

    Full Text Available Hybrid filter bank (HFB analog-to-digital systems permit wideband, high frequency conversion. This paper presents mixed norm optimal design of digital synthesis filters of a HFB. The mixed norm is a convex combination of the 2-norm and the Chebyshev norm with a weighting parameter. Robust HFB design method based on worst-case ellipsoidal uncertainty in analog filters errors is also proposed. Both the problems can be solved using semidefinite programming. The proposed mixed norm method allows designers to select the best suitable filters among a family of synthesis filters for specific applications, and the robust design method is more insensitive to analog filters errors than the nominal minimax design

  14. The Integration of Interior Architecture Education with Digital Design Approaches

    Science.gov (United States)

    Yazicioglu, Deniz Ayse

    2011-01-01

    It is inevitable that as a result of progress in technology and the changes in the ways with which design is conceived, interior architecture schools should be updated according to these requirements and that new educational processes should be tried out. It is for this reason that the scope and aim of this study have been determined as being the…

  15. Learning Design Research: Advancing Pedagogies in the Digital Age

    Science.gov (United States)

    Dobozy, Eva

    2013-01-01

    Learning design research (LDR) is establishing itself as a separate and specialised field of educational research. Worldwide, technology-mediated learning experiences in higher and further education are on the increase. LDR investigates their success in providing effective outcomes-based and personalised learning experiences. This paper reports on…

  16. Design considerations for a digital audio Class D output stage with emphasis on hearing aid application

    DEFF Research Database (Denmark)

    Pracný, Peter

    that the switching frequency of the Class D power amplifier – the main power consumer in the back end - is minimized. • In the multistage interpolation filter the first stage is implemented as a half-band IIR filter consisting of two parallel all-pass cells. A novel approach that does not require any rigorous...... numerical techniques is proposed to quantize the filter coefficients. Together with the simple all-pass cells the resulting filter has very low hardware / power demands compared to the state-of-the-art. • The switching frequency of the Class D power amplifier is reduced at the cost of the increase...... of the maximum clock frequency in the digital part of the back end. This approach moves the burden from the Class D power amplifier to the digital part, which easily scales with the IC technologies of today - optimized for digital design. • Judging by the figure-of-merit five design iterations are performed...

  17. Digital Microrobotics based on bistable modules : Design of a non-redundant digital micropositioning robot.

    OpenAIRE

    Chalvet, Vincent; Zarycki, Artur; Haddab, Yassine; Lutz, Philippe

    2011-01-01

    International audience; High precision manipulation becomes a recurrent need in micro or nanoscale. Microrobots based on active material were designed to perform micromanipulation tasks in various environments such as microrobotic stations or electronic microscopes (SEM, TEM). These active materials are used to generate proportional actuation, but show some drawbacks we want to avoid (non linearity, integration of sensors, . . . ). In this paper we propose a new type of microrobot, called dig...

  18. Entanglement without hidden nonlocality

    Science.gov (United States)

    Hirsch, Flavien; Túlio Quintino, Marco; Bowles, Joseph; Vértesi, Tamás; Brunner, Nicolas

    2016-11-01

    We consider Bell tests in which the distant observers can perform local filtering before testing a Bell inequality. Notably, in this setup, certain entangled states admitting a local hidden variable model in the standard Bell scenario can nevertheless violate a Bell inequality after filtering, displaying so-called hidden nonlocality. Here we ask whether all entangled states can violate a Bell inequality after well-chosen local filtering. We answer this question in the negative by showing that there exist entangled states without hidden nonlocality. Specifically, we prove that some two-qubit Werner states still admit a local hidden variable model after any possible local filtering on a single copy of the state.

  19. Applying the problem-based learning approach in teaching digital integrated circuit design

    OpenAIRE

    Lei, CU

    2010-01-01

    The problem-based learning (PBL) method has been applied to curriculum development in some areas of electrical engineering. The overall result has been a positive learning experience for students. However, PBL has not, as yet, been used in the area of digital integrated circuit (IC) design. IC design is in a revolutionary phase at present. It could even be said that IC design is at the beginning of a new epoch. Design is moving toward nano-size. Thus, design techniques are advancing so rap...

  20. Design Architecture and Initial Results from an FPGA Based Digital Receiver for Multistatic Meteor Measurements

    Science.gov (United States)

    Palo, Scott; Vaudrin, Cody

    Defined by a minimal RF front-end followed by an analog-to-digital converter (ADC) and con-trolled by a reconfigurable logic device (FPGA), the digital receiver will replace conventional heterodyning analog receivers currently in use by the COBRA meteor radar. A basic hardware overview touches on the major digital receiver components, theory of operation and data han-dling strategies. We address concerns within the community regarding the implementation of digital receivers in small-scale scientific radars, and outline the numerous benefits with a focus on reconfigurability. From a remote sensing viewpoint, having complete visibility into a band of the EM spectrum allows an experiment designer to focus on parameter estimation rather than hardware limitations. Finally, we show some basic multistatic receiver configurations enabled through GPS time synchronization. Currently, the digital receiver is configured to facilitate range and radial velocity determination of meteors in the MLT region for use with the COBRA meteor radar. Initial measurements from data acquired at Platteville, Colorado and Tierra Del Fuego in Argentina will be presented. We show an improvement in detection rates compared to conventional analog systems. Scientific justification for a digital receiver is clearly made by the presentation of RTI plots created using data acquired from the receiver. These plots reveal an interesting phenomenon concerning vacillating power structures in a select number of meteor trails.

  1. Modular implementation of a digital hardware design automation system

    Science.gov (United States)

    Masud, M.

    An automation system based on AHPL (A Hardware Programming Language) was developed. The project may be divided into three distinct phases: (1) Upgrading of AHPL to make it more universally applicable; (2) Implementation of a compiler for the language; and (3) illustration of how the compiler may be used to support several phases of design activities. Several new features were added to AHPL. These include: application-dependent parameters, mutliple clocks, asynchronous results, functional registers and primitive functions. The new language, called Universal AHPL, has been defined rigorously. The compiler design is modular. The parsing is done by an automatic parser generated from the SLR(1)BNF grammar of the language. The compiler produces two data bases from the AHPL description of a circuit. The first one is a tabular representation of the circuit, and the second one is a detailed interconnection linked list. The two data bases provide a means to interface the compiler to application-dependent CAD systems.

  2. Design of Tree Structure in Context Clustering Process of Hidden Markov Model-Based Thai Speech Synthesis

    Directory of Open Access Journals (Sweden)

    Suphattharachai Chomphan

    2012-01-01

    Full Text Available Problem statement: In HMM-based Thai speech synthesis, the tone degradation due to the imbalance of training data of all tones. Some distortion of syllable duration is obviously noticeable when the system is trained with a small amount of data. These problems cause the decrement in naturalness and intelligibility of the synthesized speech. Approach: This study proposes an approach to improve the correctness of tone of the synthesized speech which is generated by an HMM-based Thai speech synthesis system. In the tree-based context clustering process, tone groups and tone types are used to design four different structures of decision tree including a single binary tree structure, a simple tone-separated tree structure, a constancy-based-tone-separated tree structure and a trend-based-tone-separated tree structure. Results: A subjective evaluation of tone correctness is conducted by using tone perception of eight Thai listeners. The simple tone-separated tree structure gives the highest level of tone correctness, while the single binary tree structure gives the lowest level of tone correctness. The additional contextual tone information which is applied to all structures of the decision tree achieves a significant improvement of tone correctness. Finally, the evaluation of syllable duration distortion among the four structures shows that the constancy-based-tone-separated and the trend-based-tone-separated tree structures can alleviate the distortions that appear when using the simple tone-separated tree structure. Conclusion: The appropriate structure of tree in context clustering process with the additional contextual tone information can improve the correctness of tones, while the constancy-based-tone-separated and the trend-based-tone-separated tree structures can alleviate the syllable duration distortions.

  3. Formal Learning Sequences and Progression in the Studio: A Framework for Digital Design Education

    Directory of Open Access Journals (Sweden)

    Pontus Wärnestål

    2016-02-01

    Full Text Available This paper examines how to leverage the design studio learning environment throughout long-term Digital Design education in order to support students to progress from tactical, well-defined, device-centric routine design, to confidently design sustainable solutions for strategic, complex, problems for a wide range of devices and platforms in the digital space. We present a framework derived from literature on design, creativity, and theories on learning that: (a implements a theory of formal learning sequences as a user-centered design process in the studio; and (b describes design challenge progressions in the design studio environment modeled in seven dimensions. The framework can be used as a tool for designing, evaluating, and communicating course progressions within – and between series of – design studio courses. This approach is evaluated by implementing a formal learning sequence framework in a series of design studio courses that progress in an undergraduate design-oriented Informatics program. Reflections from students, teachers, and external clients indicate high student motivation and learning goal achievement, high teacher satisfaction and skill development, and high satisfaction among external clients.

  4. Constraining solar hidden photons using HPGe detector

    Energy Technology Data Exchange (ETDEWEB)

    Horvat, R.; Kekez, D., E-mail: Dalibor.Kekez@irb.hr; Krčmar, M.; Krečak, Z.; Ljubičić, A.

    2013-04-25

    In this Letter we report on the results of our search for photons from a U(1) gauge factor in the hidden sector of the full theory. With our experimental setup we observe the single spectrum in a HPGe detector arising as a result of the photoelectric-like absorption of hidden photons emitted from the Sun on germanium atoms inside the detector. The main ingredient of the theory used in our analysis, a severely constrained kinetic mixing from the two U(1) gauge factors and massive hidden photons, entails both photon into hidden state oscillations and a minuscule coupling of hidden photons to visible matter, of which the latter our experimental setup has been designed to observe. On a theoretical side, full account was taken of the effects of refraction and damping of photons while propagating in Sun's interior as well as in the detector. We exclude hidden photons with kinetic couplings χ>(2.2×10{sup −13}–3×10{sup −7}) in the mass region 0.2 eV≲m{sub γ{sup ′}}≲30 keV. Our constraints on the mixing parameter χ in the mass region from 20 eV up to 15 keV prove even slightly better then those obtained recently by using data from the CAST experiment, albeit still somewhat weaker than those obtained from solar and HB stars lifetime arguments.

  5. A modern course on digital design at the University of Twente

    NARCIS (Netherlands)

    Beusekamp, M.F.

    1992-01-01

    At the University of Twente, the Netherlands a modern course on basic digital design has been developed. This course, which is based on a text book in English (K. J. Breeding, 1992), is supported by a sophisticated computer-assisted learning program and life-like practical work with extensive use of

  6. Safety and security aspects in design of digital safety I and C in nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Ding, Yongjian [University of Applied Sciences Magdeburg-Stendal, Magdeburg (Germany). Inst. of Electrical Engineering; Waedt, Karl [Areva GmbH, Erlangen (Germany). PEAS-G

    2016-05-15

    The paper describes a safety objective oriented systematic design approach of digital (computerized) safety I and C in modern nuclear power plants which considers the plant safety requirements as well as cybersecurity needs. The defence in depth philosophy is applied by using different defence lines in the I and C architecture and protection zones in the plant IT environment.

  7. Creative Design of Digital Cognitive Games: Application of Cognitive Toys and Isomorphism

    Science.gov (United States)

    Sedig, Kamran; Haworth, Robert

    2012-01-01

    Digital cognitive games (DCGs) are games whose primary purpose is to mediate (i.e., support, develop, and enhance) cognitive activities such as problem solving, decision making, planning, and critical reasoning. As these games increase in popularity and usage, more attention should be paid to their design. Currently, there is a lack of design…

  8. [Principles of design of neural-network analog-to-digital converters of bioelectric signals].

    Science.gov (United States)

    Loktiukhin, V N; Chelebaev, S V

    2007-01-01

    A design principle and a procedure for synthesis of neural-network analog-to-digital converters of bioelectric signals are suggested. An example of implementation of an FPGA-based neural-network converter for classification of bioparameters is presented.

  9. Young Children's Learning of Novel Digital Interfaces: How Technology Experience, Age, and Design Come into Play

    Science.gov (United States)

    Gilutz, Shuli

    2009-01-01

    This study looks at the relationship between age, technology experience, and design factors in determining young children's comprehension of novel digital interfaces. In Experiment 1, 35 preschoolers played three games that varied in complexity and familiarity. Parental questionnaires were used to assess children's previous technology experience.…

  10. Design Principles for "Thriving in Our Digital World": A High School Computer Science Course

    Science.gov (United States)

    Veletsianos, George; Beth, Bradley; Lin, Calvin; Russell, Gregory

    2016-01-01

    "Thriving in Our Digital World" is a technology-enhanced dual enrollment course introducing high school students to computer science through project- and problem-based learning. This article describes the evolution of the course and five lessons learned during the design, development, implementation, and iteration of the course from its…

  11. The design and implementation of an infrastructure for multimedia digital libraries

    NARCIS (Netherlands)

    Vries, de A.P.; Eberman, B.; Kovalcin, D.E.

    1998-01-01

    We develop an infrastructure for managing, indexing and serving multimedia content in digital libraries. This infrastructure follows the model of the Web, and thereby is distributed in nature. We discuss the design of the Librarian, the component that manages meta data about the content. The managem

  12. The Participatory Design of a (Today and) Future Digital Entomology Lab

    Science.gov (United States)

    Hai-Jew, Shalin

    2011-01-01

    This article showcases a virtual interactive participatory design activity for building a digital entomology lab. Conceptualized as a virtual complement to a general entomology course at Kansas State University, the lab would allow learners to explore morphological aspects of insects--their various forms and functions--in order to understand…

  13. On design-oriented research and digital learning materials in higher education

    NARCIS (Netherlands)

    Hartog, R.J.M.

    2012-01-01

    The context of the research described in this thesis is formed by a number of research projects that were aimed at the design, development, implementation, use and evaluation of innovative digital learning materials. Most of these projects were carried out mainly within Wageningen University. In

  14. Design Principles for "Thriving in Our Digital World": A High School Computer Science Course

    Science.gov (United States)

    Veletsianos, George; Beth, Bradley; Lin, Calvin; Russell, Gregory

    2016-01-01

    "Thriving in Our Digital World" is a technology-enhanced dual enrollment course introducing high school students to computer science through project- and problem-based learning. This article describes the evolution of the course and five lessons learned during the design, development, implementation, and iteration of the course from its…

  15. The Participatory Design of a (Today and) Future Digital Entomology Lab

    Science.gov (United States)

    Hai-Jew, Shalin

    2011-01-01

    This article showcases a virtual interactive participatory design activity for building a digital entomology lab. Conceptualized as a virtual complement to a general entomology course at Kansas State University, the lab would allow learners to explore morphological aspects of insects--their various forms and functions--in order to understand…

  16. Design Guidelines for the Development of Digital Nutrigenomics Learning Material for Heterogeneous Target Groups

    Science.gov (United States)

    Busstra, Maria C.; Hartog, Rob; Kersten, Sander; Muller, Michael

    2007-01-01

    Nutritional genomics, or nutrigenomics, can be considered as the combination of molecular nutrition and genomics. Students who attend courses in nutrigenomics differ with respect to their prior knowledge. This study describes digital nutrigenomics learning material suitable for students from various backgrounds and provides design guidelines for…

  17. Low Power Digital Clock Design Using LVCMOS Input/Output Standards on 45nm FPGA

    DEFF Research Database (Denmark)

    Pandey, Sujeet; Mehta, Rishabh; Kalia, Kartik

    2016-01-01

    How wonderful it would be if every device we use is energy efficient. This is an approach to design an efficient digital clock that consumes low amount of power. This is done by varying frequency to different levels and checking corresponding amount of energy consumed. Low Voltage Complementary...

  18. Digital Games, Design, and Learning: A Systematic Review and Meta-Analysis

    Science.gov (United States)

    Clark, Douglas B.; Tanner-Smith, Emily E.; Killingsworth, Stephen S.

    2016-01-01

    In this meta-analysis, we systematically reviewed research on digital games and learning for K-16 students. We synthesized comparisons of game versus nongame conditions (i.e., media comparisons) and comparisons of augmented games versus standard game designs (i.e., value-added comparisons). We used random-effects meta-regression models with robust…

  19. On design-oriented research and digital learning materials in higher education

    NARCIS (Netherlands)

    Hartog, R.J.M.

    2012-01-01

    The context of the research described in this thesis is formed by a number of research projects that were aimed at the design, development, implementation, use and evaluation of innovative digital learning materials. Most of these projects were carried out mainly within Wageningen University. In thi

  20. On design-oriented research and digital learning materials in higher education

    NARCIS (Netherlands)

    Hartog, R.J.M.

    2012-01-01

    The context of the research described in this thesis is formed by a number of research projects that were aimed at the design, development, implementation, use and evaluation of innovative digital learning materials. Most of these projects were carried out mainly within Wageningen University. In thi

  1. Coping with different roles in intensive care nursing : design implications for digital support

    NARCIS (Netherlands)

    Melles, Marijke; Freudenthal, Adinda; Bouwman, Addie; Snijders, Chris; de Ridder, Huib

    2010-01-01

    Objectives The aim of this study is to arrive at design implications for the digital support of intensive care nurses, with a focus on supporting them in their roles as practitioners, as scholars and in their human response to their work. Methods Seventeen nurses from six different Dutch hospitals w

  2. Co-Designing Digital Technologies for Cultural Heritage Preservation with Indigenous Communities in Namibia

    DEFF Research Database (Denmark)

    Rodil, Kasper

    The thesis is the result of a particular approach to co-designing digital systems with OvaHerero Elders in Namibia. These systems are intended to both preserve Intangible Cultural Heritage (ICH) and become dissemination tools for OvaHerero youths. To handle this challenge, I adopted a Participatory...

  3. Behavioral study and design of a digital interpolator filter for wireless reconfigurable transmitters

    Science.gov (United States)

    Ferragina, V.; Frassone, A.; Ghittori, N.; Malcovati, P.; Vigna, A.

    2005-06-01

    The behavioral analysis and the design in a 0.13 μm CMOS technology of a digital interpolator filter for wireless applications are presented. The proposed block is designed to be embedded in the baseband part of a reconfigurable transmitter (WLAN 802.11a, UMTS) to operate as a sampling frequency boost between the digital signal processor (DSP) and the digital-to-analog converter (DAC). In recent trends the DAC of such transmitters usually operates at high conversion frequencies (to allow a relaxed implementation of the following analog reconstruction filter), while the DSP output flows at low frequencies (typically Nyquist rate). Thus a block able to increase the digital data rate, like the one proposed, is needed before the DAC. For example, in the WLAN case, an interpolation factor of 4 has been used, allowing the digital data frequency to raise from 20 MHz to 80 MHz. Using a time-domain model of the TX chain, a behavioral analysis has been performed to determine the impact of the filter performance on the quality of the signal at the antenna. This study has led to the evaluation of the z-domain filter transfer function, together with the specifications concerning a finite precision implementation. A VHDL description has allowed an automatic synthesis of the circuit in a 0.13 μm CMOS technology (with a supply voltage of 1.2 V). Post-synthesis simulations have confirmed the effectiveness of the proposed study.

  4. Noise-shaping all-digital phase-locked loops modeling, simulation, analysis and design

    CERN Document Server

    Brandonisio, Francesco

    2014-01-01

    This book presents a novel approach to the analysis and design of all-digital phase-locked loops (ADPLLs), technology widely used in wireless communication devices. The authors provide an overview of ADPLL architectures, time-to-digital converters (TDCs) and noise shaping. Realistic examples illustrate how to analyze and simulate phase noise in the presence of sigma-delta modulation and time-to-digital conversion. Readers will gain a deep understanding of ADPLLs and the central role played by noise-shaping. A range of ADPLL and TDC architectures are presented in unified manner. Analytical and simulation tools are discussed in detail. Matlab code is included that can be reused to design, simulate and analyze the ADPLL architectures that are presented in the book.   • Discusses in detail a wide range of all-digital phase-locked loops architectures; • Presents a unified framework in which to model time-to-digital converters for ADPLLs; • Explains a procedure to predict and simulate phase noise in oscil...

  5. A digital neuron-type processor and its VLSI design

    Science.gov (United States)

    Akel, H.; Habib, Mahmoud K.

    1989-05-01

    A set of neuron-type circuits elements based on logic gate circuits with multiinput multifan output capability is described. Three types of elements are introduced, one called the cell body with its dendritic inputs and synaptic junction, another representing the axon base, and the axon circuit. These three elements are cascaded to form a neuron-type processing element. The circuit performs input temporal and spatial summation as well as thresholding. The entire neuron circuit is simulated and a design is given using VSLI techniques.

  6. User centered design of a digital procedure guidance component for nuclear power plant operation

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Paulo V.R. de; Santos, Isaac L. dos; Oliveira, Mauro V. de; Grecco, Claudio H.S.; Mol, Antonio C. [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil)]. E-mails: paulov@ien.gov.br; luquetti@ien.gov.br; mvitor@ien.gov.br; grecco@ien.gov.br; mol@ien.gov.br

    2007-07-01

    The use of nuclear power plants to produce electric energy is a safety-critical process where ultimate operational decisions still relies with the control room operators. Thus it is important to provide the best possible decision support through effective supervisory control interfaces. A user centered design approach, based on cognitive task analysis methods, was used to observe the operators training on the nuclear power plant simulator of the Human System Interface Laboratory (LABIHS). We noted deficiencies in the integration between the computerized interfaces and the hardcopy (paper) procedures. An new prototype of digital procedures - the digital procedure component guidance (PCG) - was designed in PowerPoint as an alternative to the current hardcopy procedure manuals. The design improves upon the graphical layout of system information and provides better integration of procedures, automation, and alarm systems. The design was validated by expert opinion and a scenario-based comparison. Future implementation and testing of the redesign is suggested for further validation. (author)

  7. Design of an ultra-low-power digital processor for passive UHF RFID tags

    Institute of Scientific and Technical Information of China (English)

    Shi Wanggen; Zhuang Yiqi; Li Xiaoming; Wang Xianghua; Jin Zhao; Wang Dan

    2009-01-01

    A new architecture of digital processors for passive UHF radio-frequency identification tags is proposed.This architecture is based on ISO/IEC 18000-6C and targeted at ultra-low power consumption.By applying methods like system-level power management,global clock gating and low voltage implementation,the total power of the design is reduced to a few microwatts.In addition,an innovative way for the design of a true RNG is presented,which contributes to both low power and secure data transaction.The digital processor is verified by an integrated FPGA platform and implemented by the Synopsys design kit for ASIC flows.The design fits different CMOS technologies and has been taped out using the 2P4M 0.35μm process of Chartered Semiconductor.

  8. Designing a Deeply Digital Science Curriculum: Supporting Teacher Learning and Implementation with Organizing Technologies

    Science.gov (United States)

    Leary, Heather; Severance, Samuel; Penuel, William R.; Quigley, David; Sumner, Tamara; Devaul, Holly

    2016-02-01

    This paper examines the impacts of technology (e.g., Chromebooks, Google Drive) on teacher learning and student activity in the development and implementation of a deeply digital high school biology unit. Using design-based implementation research, teachers co-designed with researchers and curriculum specialists a student-centered unit aligned to the Next Generation Science Standards (NGSS) that utilizes classroom technology. Qualitative and quantitative data were collected to understand the barriers that inhibit the implementation of a digital curriculum as well as the extent that teachers engage in the design process and begin to make shifts in their practice. We found that through the co-design process teachers began to shift their knowledge of NGSS, technology implementation, and adapted to tensions and barriers inherent in the process.

  9. Miniature objective lens for array digital pathology: design improvement based on clinical evaluation

    Science.gov (United States)

    McCall, Brian; Pierce, Mark; Graviss, Edward A.; Richards-Kortum, Rebecca R.; Tkaczyk, Tomasz S.

    2016-03-01

    A miniature objective designed for digital detection of Mycobacterium tuberculosis (MTB) was evaluated for diagnostic accuracy. The objective was designed for array microscopy, but fabricated and evaluated at this stage of development as a single objective. The counts and diagnoses of patient samples were directly compared for digital detection and standard microscopy. The results were found to be correlated and highly concordant. The evaluation of this lens by direct comparison to standard fluorescence sputum smear microscopy presented unique challenges and led to some new insights in the role played by the system parameters of the microscope. The design parameters and how they were developed are reviewed in light of these results. New system parameters are proposed with the goal of easing the challenges of evaluating the miniature objective and maintaining the optical performance that produced the agreeable results presented without over-optimizing. A new design is presented that meets and exceeds these criteria.

  10. Digital tablets and applications in preschool – Preschoolers’ creative transformation of didactic design

    Directory of Open Access Journals (Sweden)

    Susanne Kjällander

    2014-12-01

    Full Text Available Little is known about preschoolers and their engagement with digital tablets. This article addresses this gap by drawing on findings from two research projects. The aim is to illustrate how children make meaning, transform and play while engaging with various applications comprised by the materiality of the digital tablets. Empirical video material has been multimodally transcribed and empirical examples are framed by a design theoretical perspective. Findings capture diverse experiences illustrating how preschoolers creatively manipulate and playfully transform didactic designs. The results illustrate how children´s self-initiated play with application’s design shifts the balance of authority that typically exists between adults and children, and the article concludes in a suggestion of how the notion of play can be understood with a design theoretical perspective.

  11. B-graph sampling to estimate the size of a hidden population

    NARCIS (Netherlands)

    Spreen, M.; Bogaerts, S.

    2015-01-01

    Link-tracing designs are often used to estimate the size of hidden populations by utilizing the relational links between their members. A major problem in studies of hidden populations is the lack of a convenient sampling frame. The most frequently applied design in studies of hidden populations is

  12. Computer Algorithms for the Design and Implementation of Linear Phase Finite Impulse Response Digital Filters

    Science.gov (United States)

    1981-07-01

    1p^^i-J\\\\^3^\\\\^. TECHNICAL LIBRARY AD^y^.q ijg. TECHNICAL REPORT ARBRL-TR-02346 COMPUTER ALGORITHMS FOR THE DESIGN AND IMPLEMENTATION OF LINEAR...INSTRUCTIONS BEFORE COMPLETI?>G FORM 1. REPORT NUMBER TECHNICAL REPORT ARBRL-TR-n2.^46 i. GOVT ACCESSION NO. *. TITLE fand Sijfam;»; COMPUTER ... ALGORITHMS FOR THE DESIGN AND IMPLEMENTATION OF LINEAR PHASE FINPTE IMPULSE RESPONSE DIGITAL FILTERS 7. AUTHORf*; James N. Walbert 9

  13. Design And Construction Of Digital Multi-Meter Using PIC Microcontroller

    OpenAIRE

    Khawn Nue; Dr. KyawSoe Lwin; Hla Myo Tun

    2015-01-01

    Abstract This thesis describes the design and construction of digital multi-meter using PIC microcontroller. In this system a typical multi-meter may include features such as the ability to measure ACDC voltage DC current resistance temperature diodes frequency and connectivity. This design uses of the PIC microcontroller voltage rectifiers voltage divide potentiometer LCD and other instruments to complete the measure. When we used what we have learned of microprocessors and adjust the progra...

  14. Uncertainty Reduction Via Parameter Design of A Fast Digital Integrator for Magnetic Field Measurement

    CERN Document Server

    Arpaia, P; Lucariello, G; Spiezia, G

    2007-01-01

    At European Centre of Nuclear Research (CERN), within the new Large Hadron Collider (LHC) project, measurements of magnetic flux with uncertainty of 10 ppm at a few of decades of Hz for several minutes are required. With this aim, a new Fast Digital Integrator (FDI) has been developed in cooperation with University of Sannio, Italy [1]. This paper deals with the final design tuning for achieving target uncertainty by means of experimental statistical parameter design.

  15. Interface Design Of Digital Platform For Bio Signal Processing

    Institute of Scientific and Technical Information of China (English)

    Jongsik; Park; Moonsu; Jang; Seongoo; Lee

    2010-01-01

    <正>Bio-sensor arrays for multi-channel recording have been developed recently and signal processing platforms for those signals have been studied actively.But it’s thereal situation which these technologies are generally developed and studied respectively.So the interface design between recording array and signal processing platform is also an important issue to make bio-sensor signal processing system.In this paper,we proposed interface which has unique protocols to control sensor array and operate platform.There are two types of protocols in the interface.One is between sensor array and MCU in platform and the other is between MCU and board for wireless communication.Basically,each protocol has two kinds of modes(single,frame)and it can be extended if needed.

  16. Design of a New Chaos Circuit and Its Encryption to Digital Information

    Institute of Scientific and Technical Information of China (English)

    WANG Hong; PENG Jian-hua; ZHOU Zhen-gou

    2004-01-01

    A new hyperchaos circuit system with simple structure is designed in this paper. It can be implemented with changeable dimensions 3, 5, 7, 9, etc, therefore it can afford different security grades for applications. The dynamic characters of the 7th order circuit have been analyzed as an example. Using the hyperchaos time sequence produced by this circuit as key sequence, the encryption and decryption to digital signals of text and image files have been realized, and the real-time ability has been increased with encrypting digital signals per byte.

  17. Design and Implementation of Digital Filter Bank to Reduce Noise and Reconstruct the Input Signals

    Directory of Open Access Journals (Sweden)

    Kawser Ahammed

    2015-04-01

    Full Text Available The main theme of this paper is to reduce noise from the noisy composite signal and reconstruct the input signals from the composite signal by designing FIR digital filter bank. In this work, three sinusoidal signals of different frequencies and amplitudes are combined to get composite signal and a low frequency noise signal is added with the composite signal to get noisy composite signal. Finally noisy composite signal is filtered by using FIR digital filter bank to reduce noise and reconstruct the input signals.

  18. A Design and Research on Protection of Architectural Heritage Based on Digital Technology

    Directory of Open Access Journals (Sweden)

    Hou Shuang Qing

    2016-01-01

    Full Text Available In the era of digital information, how to reasonably use new-tech and idea for the architectural heritage protection remains urgent. In terms of digital protection, 3D laser scanning technology can perfectly remedy the manual measurement limitation thus correctly obtaining the relevant data. Via analysis, we find that the architectural heritage bears in itself the parameterized characteristic. As Building Information Modeling (BIM can help realize the parametric design, we proposed a feasible Architectural Heritage Information Model with the BIM “family” connecting architectural heritage and BIM. Finally, the parameter-induced graphic driving is achieved based on the relation between the two.

  19. Hardware synthesis from DDL description. [simulating a digital system for computerized design of large scale integrated circuits

    Science.gov (United States)

    Shiva, S. G.; Shah, A. M.

    1980-01-01

    The details of digital systems can be conveniently input into the design automation system by means of hardware description language (HDL). The computer aided design and test (CADAT) system at NASA MSFC is used for the LSI design. The digital design language (DDL) was selected as HDL for the CADAT System. DDL translator output can be used for the hardware implementation of the digital design. Problems of selecting the standard cells from the CADAT standard cell library to realize the logic implied by the DDL description of the system are addressed.

  20. Design of a digital ride quality augmentation system for a commuter aircraft

    Science.gov (United States)

    Hammond, T. A.; Downing, D. R.; Amin, S. P.; Paduano, J.

    1984-01-01

    Commuter aircraft with low wing loading that operate at low altitudes are particularly susceptible to unwanted accelerations caused by atmospheric gusts. This paper describes the design and analysis of a longitudinal digital Ride Quality Augmentation System (RQAS). The RQAS designs were conducted for a Cessna 402B aircraft using the flaps and the elevator as the control surfaces. The designs are generated using linear quadratic Gaussian theory and analyzed in both the time and frequency domains. Nominal designs are presented at five flight conditions that cover a total mission. Trade-off studies are conducted to investigate the effect of sample time, computational delay time, servo bandwidth and control power.

  1. Digital mock-up design of the remote steerable ITER ECRH launching system

    Energy Technology Data Exchange (ETDEWEB)

    Ronden, D.M.S. [FOM Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands)]. E-mail: ronden@rijnh.nl; Bruschi, A. [Instituto di Fisica del Plasma, Association EURATOM-ENEA-CNR, via Cozzi 53, 20125 Milan (Italy); Danilov, I. [Forschungszentrum Karlsruhe, Association EURATOM-FZK, D-76021 Karlsruhe (Germany); Elzendoorn, B.S.Q. [FOM Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands); Graswinckel, M.F. [FOM Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands); Heidinger, R. [Forschungszentrum Karlsruhe, Association EURATOM-FZK, D-76021 Karlsruhe (Germany); Ramponi, G. [Instituto di Fisica del Plasma, Association EURATOM-ENEA-CNR, via Cozzi 53, 20125 Milan (Italy); Verhoeven, A.G.A. [FOM Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands)

    2005-11-15

    A 3D model is of vital interest to the entire development process of the remote steering (RS) electron cyclotron resonance heating (ECRH) top launcher. The aim is to have a digital model that continuously incorporates the latest developments of the overall design. This paper will present the results of the effort put in creating this 3D model and will discuss details about parameterized computer aided design (CAD), which enables the designer to integrate newly acquired insights on a much shorter timescale. Also, the detailed design of the steerable mirror mechanism will be presented.

  2. Hardware/software co-design and optimization for cyberphysical integration in digital microfluidic biochips

    CERN Document Server

    Luo, Yan; Ho, Tsung-Yi

    2015-01-01

    This book describes a comprehensive framework for hardware/software co-design, optimization, and use of robust, low-cost, and cyberphysical digital microfluidic systems. Readers with a background in electronic design automation will find this book to be a valuable reference for leveraging conventional VLSI CAD techniques for emerging technologies, e.g., biochips or bioMEMS. Readers from the circuit/system design community will benefit from methods presented to extend design and testing techniques from microelectronics to mixed-technology microsystems. For readers from the microfluidics domain,

  3. Digital VLSI systems design a design manual for implementation of projects on FPGAs and ASICs using Verilog

    CERN Document Server

    Ramachandran, S

    2007-01-01

    Digital VLSI Systems Design is written for an advanced level course using Verilog and is meant for undergraduates, graduates and research scholars of Electrical, Electronics, Embedded Systems, Computer Engineering and interdisciplinary departments such as Bio Medical, Mechanical, Information Technology, Physics, etc. It serves as a reference design manual for practicing engineers and researchers as well. Diligent freelance readers and consultants may also start using this book with ease. The book presents new material and theory as well as synthesis of recent work with complete Project Designs

  4. Verilog Based Design and Simulation of MAC and PHY Layers for Zigbee Digital Transmitter

    Directory of Open Access Journals (Sweden)

    Pasala Raja Prakasha Rao

    2014-12-01

    Full Text Available The past several years have witnessed a rapid development in the wireless network area. So far wireless networking has been focused on high-speed and long range applications. Zigbee technology was developed for a Wireless Personal Area Networks (WPAN, aimed at control and military applications with low data rate and low power consumption. Zigbee is a standard defines the set of communication protocols for low-data-rate short-range wireless networking. Zigbee-based wireless devices operate in 868 MHz, 915 MHz, and 2.4 GHz frequency bands. The maximum data rate is 250K bits per second. Zigbee is mainly for battery-powered applications where low data rate, low cost, and long battery life are main requirements. This paper explores Verilog design for various blocks in Zigbee Transmitter architecture for an acknowledgement frame. The word digital has made a dramatic impact on our society. Developments of digital solutions have been possible due to good digital system design and modeling techniques. Further developments have been made and introduced VLSI in order to reduce size of the architecture, to improve speed of operation, improvements in predictability of the circuit behavior. Digital Zigbee Transmitter comprises of Cyclic Redundancy Check, Bit-to-Symbol block, Symbol-to-chip block, Modulator and Pulse shaping block. The work here is to show how we can design Zigbee transmitter with its specifications by using Verilog with less number of slices and Look up tables (LUTs.

  5. Design and Implementation of Digital Chebyshev Type II Filter using XSG for Noise Reduction in ECG Signal

    Directory of Open Access Journals (Sweden)

    Kaustubh Gaikwad

    2016-06-01

    Full Text Available ASIC Chips and Digital Signal Processors are generally used for implementing digital filters. Now days the advanced technologies lead to use of field programmable Gate Array (FPGA for the implementation of Digital Filters.The present paper deals with Design and Implementation of Digital IIR Chebyshev type II filter using Xilinx System Generator. The Quantization and Overflow are main crucial parameters while designing the filter on FPGA and that need to be consider for getting the stability of the filter. As compare to the conventional DSP the speed of the system is increased by implementation on FPGA. Digital Chebyshev type II filter is initially designed analytically for the desired Specifications and simulated using Simulink in Matlab environment. This paper also proposes the method to implement Digital IIR Chebyshev type II Filter by using XSG platform. The filter has shown good performance for noise removal in ECG

  6. Design of FIR digital filters for pulse shaping and channel equalization using time-domain optimization

    Science.gov (United States)

    Houts, R. C.; Vaughn, G. L.

    1974-01-01

    Three algorithms are developed for designing finite impulse response digital filters to be used for pulse shaping and channel equalization. The first is the Minimax algorithm which uses linear programming to design a frequency-sampling filter with a pulse shape that approximates the specification in a minimax sense. Design examples are included which accurately approximate a specified impulse response with a maximum error of 0.03 using only six resonators. The second algorithm is an extension of the Minimax algorithm to design preset equalizers for channels with known impulse responses. Both transversal and frequency-sampling equalizer structures are designed to produce a minimax approximation of a specified channel output waveform. Examples of these designs are compared as to the accuracy of the approximation, the resultant intersymbol interference (ISI), and the required transmitted energy. While the transversal designs are slightly more accurate, the frequency-sampling designs using six resonators have smaller ISI and energy values.

  7. Digital image steganography algorithm based on genetic algorithm and high hidden capacity%基于遗传算法和高隐藏容量的数字图像隐写算法

    Institute of Scientific and Technical Information of China (English)

    谭志伟; 孙新领; 杨观赐

    2016-01-01

    In order to obtain bigger steganography capacity and higher steganography security level,a digital image safety steganography algorithm based on genetic algorithm and high hidden capacity is proposed. The steganography is modeled as a search problem. The genetic algorithm is used to find out the optimal direction and starting point in the host image to hide the enciphered data,and make the steganography image obtain the maximal peak signal⁃to⁃noise ratio(PSNR),whose fitting func⁃tion is PSNR. Firstly,the host image,confidential image and chromosome should be prepared,after that the bit plane and bit direction genes are used to convert the host pixel sequence into bit sequence. And then,the confidential pixel bits are embed⁃ded into the corresponding pixel bits. Finally,the fitting function is used to determine the iteration times. The PSNR and struc⁃tural similarity index measure (SSIM) are used to assess the steganography result. Compared with other steganography algo⁃rithms,the proposed algorithm can significantly improve the steganography quality and safety. Its PSNR and SSIM are higher than those of other algorithms. In addition,its hidden capacity is big enough,which can reach up to 49.5%.%为了获得更大的隐写容量和更高的隐写安全级别,提出一种基于遗传算法和高隐藏容量的数字图像安全隐写算法。将隐写术作为一个搜索问题进行建模,遗传算法的目的是在宿主图像中找到最优的方向和最优的起始点用于隐藏加密数据,使得隐写图像获取最大的峰值信噪比,其拟合函数为峰值信噪比。首先准备宿主图像,机密图像和染色体,利用比特位面和比特方向基因将宿主像素序列转化为比特位序列;然后将机密像素位嵌入到相应的比特像素位;最后利用拟合函数决定迭代结束次数。运用峰值信噪比(PSNR)和结构相似性度量(SSIM)评估隐写结果,与其他隐写算法相比,该

  8. Fractional Order Digital Differentiator Design Based on Power Function and Least squares

    Science.gov (United States)

    Kumar, Manjeet; Rawat, Tarun Kumar

    2016-10-01

    In this article, we propose the use of power function and least squares method for designing of a fractional order digital differentiator. The input signal is transformed into a power function by using Taylor series expansion, and its fractional derivative is computed using the Grunwald-Letnikov (G-L) definition. Next, the fractional order digital differentiator is modelled as a finite impulse response (FIR) system that yields fractional order derivative of the G-L type for a power function. The FIR system coefficients are obtained by using the least squares method. Two examples are used to demonstrate that the fractional derivative of the digital signals is computed by using the proposed technique. The results of the third and fourth examples reveal that the proposed technique gives superior performance in comparison with the existing techniques.

  9. Penyisipan Media Teks dan Citra Menggunakan Teknik Steganografi pada Media Pembawa Citra Digital

    Directory of Open Access Journals (Sweden)

    Alim Muadzani

    2016-08-01

    Full Text Available Information has now become an  important comodity in human life, with the rapid development of communications technology has enable people to communicate and exchange information more easily. Internet is very popular and used by billions users worldwide, the information passing through the internet is very large, and some certain people trying to get this information for profit. The information need to be secured to prevent the others to get the information that send through the internet, steganography can be used to  hide the information before sending it and the receiver can recover the hidden data. Digital steganography using computer can use a variety of digital file, digital image file is one of them. With the infomation being hidden inside the image-carrier, the others will not aware about the hidden information. Application created using C# programming leanguage and the steganoraphy method using Least Significant Bit Insertion (LSBI. Microsoft Visual Studio used as Integrated Development Environtment (IDE to code and design the user interface. Software develpment model using Extreme Programming, and the testing using black box method. Application designed to hide text or image inside an image-carrier and the hidden text or image can be recovered. The result of this research are an application that can hide text or image into  image-carrier, and the hidden text or image can be recovered. Based on the testing application can run as expected and fulfill all the requirements.

  10. Human Factors Guidance for Control Room and Digital Human-System Interface Design and Modification, Guidelines for Planning, Specification, Design, Licensing, Implementation, Training, Operation and Maintenance

    Energy Technology Data Exchange (ETDEWEB)

    R. Fink, D. Hill, J. O' Hara

    2004-11-30

    Nuclear plant operators face a significant challenge designing and modifying control rooms. This report provides guidance on planning, designing, implementing and operating modernized control rooms and digital human-system interfaces.

  11. An Open-Source Tool Set Enabling Analog-Digital-Software Co-Design

    Directory of Open Access Journals (Sweden)

    Michelle Collins

    2016-02-01

    Full Text Available This paper presents an analog-digital hardware-software co-design environment for simulating and programming reconfigurable systems. The tool simulates, designs, as well as enables experimental measurements after compiling to configurable systems in the same integrated design tool framework. High level software in Scilab/Xcos (open-source programs similar to MATLAB/Simulink that converts the high-level block description by the user to blif format (sci2blif, which acts as an input to the modified VPR tool, including the code v p r 2 s w c s , encoding the specific platform through specific architecture files, resulting in a targetable switch list on the resulting configurable analog–digital system. The resulting tool uses an analog and mixed-signal library of components, enabling users and future researchers access to the basic analog operations/computations that are possible.

  12. Design of reconfigurable low-complexity digital hearing aid using Farrow structure based variable bandwidth filters

    Directory of Open Access Journals (Sweden)

    Nisha Haridas

    2016-04-01

    Full Text Available A low complexity digital hearing aid is designed using a set of subband filters, for various audiograms. It is important for the device to be made of simple hardware, so that the device becomes less bulky. Hence, a low complexity design of reconfigurable filter is proposed in this paper. The tunable filter structure is designed using Farrow based variable bandwidth filter. The coefficients of the filter are expressed in canonic signed digit format. The performance can be enhanced using optimization algorithm. Here, we have explored the strength of hybrid evolutionary algorithms and compared their various combinations to select a proper coefficient representation for the Farrow based filter, which results in low complexity implementation.

  13. Recent advances in the analysis, design and optimization of Digital Delta-Sigma Modulators

    Science.gov (United States)

    Kennedy, Michael Peter

    Digital Delta-Sigma Modulators (DDSMs) are almost univerally used in integrated circuits for wireless communications and digital audio, particularly in fractional-N frequency synthesizers and oversampled digital-to-analog converters (DACs). A DDSM is a nonlinear dynamical system which reduces the wordlength of an oversampled digital signal without significantly degrading the SNR in the signal band. DDSMs can exhibit a number of behaviors that are characteristic of nonlinear dynamical systems such as oscillation, coexisting steady-state solutions, sensitivity to initial conditions, and sensitivity to the input. This paper explains the root cause of deterministic spurious and idle tones in DDSMs—short periodic cycles—and describes strategies to eliminate them. The use of a DDSM simplifies the design of analog circuitry in a mixed-signal system. By reducing the bus width in a prescribed way, a DDSM can also permit more efficient downstream digital signal processing—in terms of power and speed—with negligible degradation in performance.

  14. System For The Digitization, Display And Archiving Of Radiographs: Design And Early Experience

    Science.gov (United States)

    Jennings, R. J.; Bruce, M. C.

    1985-06-01

    In this paper we describe a system for the digitization, display, and storage of radiographic images. The system was set up to support a project to assess the clinical impact of matrix size on teleradiology, defined for our purposes as the electronic recording and transmission of radiographs. The system consists of two separate facilities, one for image digitizing and the other for image display, interpretation, and archiving. The image digitizing laboratory uses a solid state scanner interfaced to a dedicated, general-purpose minicomputer. The display facility consists of a general-purpose, multi-user minicomputer with large main memory and disk capacity and a 1280 by 1024 display subsystem with three separate image memories. The two facilities communicate via magnetic tape. This paper documents the characterization of the image data base used for the project, the design and operational features of the two facilities, technical problems encountered in the digitizing and display of radiographs, and some logistical and managerial considerations involved in generating and maintaining a large digital image archive. Since many of the functions of the system we have set up are common to picture archiving and communication systems, we have, where possible, compared the performance of the system we have developed with the requirements that would have to be satisfied by a system intended for clinical use. We leave for future reports the discussion of the conduct of the image reading experiments and the results of those experiments.

  15. Analysis and design of the system of a total digital Si-gyroscope

    Science.gov (United States)

    Huang, Fuxiang; Liang, Yin

    2017-03-01

    In order to get a thorough understanding of the total digital silicon micro-gyroscope, a novel system-level model with details of both the sense and circuit is presented in this paper. Unlike the traditional structures of the digital part of the digital gyroscope, a structure with programmable delay units (PDUs) instead of DPLLs gives a brief and robust character of the whole system. And the PDUs coordinating with the FIR filter could lead to a removal of the IF filters of the sigma-delta DAC for feedback, which saves a lot of consumption. Two MASH sigma-delta ADCs are designed to convert the output of the charge-voltage converters to digital signals, which also bring a better stability. The ADCs achieve an SNR of 102.5 dB with a 10 kHz bandwidth. The stabilization of the closed drive mode has also been analyzed including how the noise caused by the quantization of the digital circuit is affecting the stabilization of both the amplitude and frequency of the driving signals. In the end, a final result of simulation of the gyroscope shows the correctness and accuracy of the whole model of the gyroscope.

  16. Hidden circuits and argumentation

    Science.gov (United States)

    Leinonen, Risto; Kesonen, Mikko H. P.; Hirvonen, Pekka E.

    2016-11-01

    Despite the relevance of DC circuits in everyday life and schools, they have been shown to cause numerous learning difficulties at various school levels. In the course of this article, we present a flexible method for teaching DC circuits at lower secondary level. The method is labelled as hidden circuits, and the essential idea underlying hidden circuits is in hiding the actual wiring of DC circuits, but to make their behaviour evident for pupils. Pupils are expected to find out the wiring of the circuit which should enhance their learning of DC circuits. We present two possible ways to utilise hidden circuits in a classroom. First, they can be used to test and enhance pupils’ conceptual understanding when pupils are expected to find out which one of the offered circuit diagram options corresponds to the actual circuit shown. This method aims to get pupils to evaluate the circuits holistically rather than locally, and as a part of that aim this method highlights any learning difficulties of pupils. Second, hidden circuits can be used to enhance pupils’ argumentation skills with the aid of argumentation sheet that illustrates the main elements of an argument. Based on the findings from our co-operating teachers and our own experiences, hidden circuits offer a flexible and motivating way to supplement teaching of DC circuits.

  17. Hidden Realities inside PBL Design Processes: Is Consensus Design an Impossible Clash of Interest between the Individual and the Collective, and Is Architecture Its First Victim?

    Science.gov (United States)

    Pihl, Ole

    2015-01-01

    How do architecture students experience the contradictions between the individual and the group at the Department of Architecture and Design of Aalborg University? The Problem-Based Learning model has been extensively applied to the department's degree programs in coherence with the Integrated Design Process, but is a group-based architecture and…

  18. A Radio for Hidden-Photon Dark Matter Detection

    CERN Document Server

    Chaudhuri, Saptarshi; Irwin, Kent; Mardon, Jeremy; Rajendran, Surjeet; Zhao, Yue

    2014-01-01

    We propose a resonant electromagnetic detector to search for hidden-photon dark matter over an extensive range of masses. Hidden-photon dark matter can be described as a weakly coupled "hidden electric field," oscillating at a frequency fixed by the mass, and able to penetrate any shielding. At low frequencies (compared to the inverse size of the shielding), we find that observable effect of the hidden photon inside any shielding is a real, oscillating magnetic field. We outline experimental setups designed to search for hidden-photon dark matter, using a tunable, resonant LC circuit designed to couple to this magnetic field. Our "straw man" setups take into consideration resonator design, readout architecture and noise estimates. At high frequencies,there is an upper limit to the useful size of a single resonator set by $1/\

  19. How Hidden Can Be Even More Hidden?

    CERN Document Server

    Fraczek, Wojciech; Szczypiorski, Krzysztof

    2011-01-01

    The paper presents Deep Hiding Techniques (DHTs) that define general techniques that can be applied to every network steganography method to improve its undetectability and make steganogram extraction harder to perform. We define five groups of techniques that can make steganogram less susceptible to detection and extraction. For each of the presented group, examples of the usage are provided based on existing network steganography methods. To authors' best knowledge presented approach is the first attempt in the state of the art to systematically describe general solutions that can make steganographic communication more hidden and steganogram extraction harder to perform.

  20. Design of Low Pass Digital FIR Filter Using Cuckoo Search Algorithm

    Directory of Open Access Journals (Sweden)

    Taranjit Singh

    2014-08-01

    Full Text Available This paper presents a novel approach of designing linear phase FIR low pass filter using cuckoo Search Algorithm (CSA. FIR filter design is a multi-modal optimization problem. The conventional optimization techniques are not efficient for digital filter design. An iterative method is introduced to find the best solution of FIR filter design problem.Flat passband and high stopband attenuation are the major characteristics required in FIR filter design. To achieve these characteristics, a Cuckoo Search algorithm (CSA is proposed in this paper. CSA have been used here for the design of linear phase finite impulse response (FIR filters. Results are presented in this paper that seems to be promising tool for FIR filter design

  1. DISEÑO Y MANIPULACIÓN DE MODELOS OCULTOS DE MARKOV, UTILIZANDO HERRAMIENTAS HTK: UNA TUTORÍA DESIGN AND MANIPULATION OF HIDDEN MARKOV MODELS USING HTK TOOLS: A TUTORIAL

    Directory of Open Access Journals (Sweden)

    Roberto Carrillo Aguilar

    2007-04-01

    Full Text Available Este trabajo da a conocer el sistema de desarrollo de software para el diseño y manipulación de modelos ocultos de Markov, denominado HTK. Actualmente, la técnica de modelos ocultos de Markov es la herramienta más efectiva para implementar sistemas reconocedores del habla. HTK está orientado principalmente a ese aspecto. Su arquitectura es robusta y autosuficiente. Permite: la entrada lógica y natural desde un micrófono, dispone de módulos para la conversión A/D, preprocesado y parametrización de la información, posee herramientas para definir y manipular modelos ocultos de Markov, tiene librerías para entrenamiento y manipulación de los modelos ocultos de Markov ya definidos, considera funciones para definir la gramática, y además: Una serie de herramientas adicionales permiten lograr el objetivo final de obtener una hipotética transcripción del habla (conversión voz - texto.This paper presents HTK, a software development platform for the design and management of Hidden Markov Models. Nowadays, the Hidden Markov Models technique is the more effective one to implement voice recognition systems. HTK is mainly oriented to this application. Its architecture is robust and self-sufficient. It allows a natural input from a microphone, it has modules for A/D conversion, it allows pre-processing and parameterization of information, it possesses tools to define and manage the Hidden Markov Models, libraries for training and use the already defined Hidden Markov Models. It has functions to define the grammar and it has additional tools to reach the final objective, to obtain an hypothetical transcription of the talking (voice to text translation.

  2. Search for Hidden Particles

    CERN Multimedia

    The SHiP Experiment is a new general-purpose fixed target facility at the SPS to search for hidden particles as predicted by a very large number of recently elaborated models of Hidden Sectors which are capable of accommodating dark matter, neutrino oscillations, and the origin of the full baryon asymmetry in the Universe. Specifically, the experiment is aimed at searching for very weakly interacting long lived particles including Heavy Neutral Leptons - right-handed partners of the active neutrinos; light supersymmetric particles - sgoldstinos, etc.; scalar, axion and vector portals to the hidden sector. The high intensity of the SPS and in particular the large production of charm mesons with the 400 GeV beam allow accessing a wide variety of light long-lived exotic particles of such models and of SUSY. Moreover, the facility is ideally suited to study the interactions of tau neutrinos.

  3. Investigation of Classification and Design Requirements for Digital Software for Advanced Research Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Park, Gee Young; Jung, H. S.; Ryu, J. S.; Park, C

    2005-06-15

    As the digital technology is being developed drastically, it is being applied to various industrial instrumentation and control (I and C) fields. In the nuclear power plants, I and C systems are also being installed by digital systems replacing their corresponding analog systems installed previously. There had been I and C systems constructed by analog technology especially for the reactor protection system in the research reactor HANARO. Parallel to the pace of the current trend for digital technology, it is desirable that all I and C systems including the safety critical and non-safety systems in an advanced research reactor is to be installed based on the computer based system. There are many attractable features in using digital systems against existing analog systems in that the digital system has a superior performance for a function and it is more flexible than the analog system. And any fruit gained from the newly developed digital technology can be easily incorporated into the existing digital system and hence, the performance improvement of a computer based system can be implemented conveniently and promptly. Moreover, the capability of high integrity in electronic circuits reduces the electronic components needed to construct the processing device and makes the electronic board simple, and this fact reveals that the hardware failure itself are unlikely to occur in the electronic device other than some electric problems. Balanced the fact mentioned above are the roles and related issues of the software loaded on the digital integrated hardware. Some defects in the course of software development might induce a severe damage on the computer system and plant systems and therefore it is obvious that comprehensive and deep considerations are to be placed on the development of the software in the design of I and C system for use in an advanced research reactor. The work investigates the domestic and international standards on the classifications of digital

  4. A Comparative Study of Ultra-Low Voltage Digital Circuit Design

    Directory of Open Access Journals (Sweden)

    Aaron Arthurs

    2012-07-01

    Full Text Available Ultra-low voltage digital circuit design is an active research area, especially for portable applications such as wearable electronics, intelligent remote sensors, implantable medical devices, and energy-harvesting systems. Due to their application scenarios and circuit components, two major goals for these systems are minimizing energy consumption and improving compatibility with low-voltage power supplies and analog components. The most effective solution to achieve these goals is to reduce the supply voltage, which,however, raises the issue of operability. At ultra-low supply voltages, the integrity of digital signals degrades dramatically due to the indifference between active and leakage currents. In addition, the system timing becomes more unpredictable as the impact of process and supply voltage variations being more significant at lower voltages. This paper presents a comparative study among three techniques for designing digital circuits operating at ultra-low voltages, i.e., Schmitt-triggered gate structure, delayinsensitive asynchronous logic, and Fully-Depleted Silicon-on-Insulator technology. Results show that despite the tradeoffs, all eight combinations of these techniques are viable for designing ultra-low voltage circuits. For a given application, the optimum circuit design can be selected from these combinations based on the lowest voltage, the dynamic range, the power budget, the performance requirement, and the available semiconductor process node.

  5. Design of efficient circularly symmetric two-dimensional variable digital FIR filters.

    Science.gov (United States)

    Bindima, Thayyil; Elias, Elizabeth

    2016-05-01

    Circularly symmetric two-dimensional (2D) finite impulse response (FIR) filters find extensive use in image and medical applications, especially for isotropic filtering. Moreover, the design and implementation of 2D digital filters with variable fractional delay and variable magnitude responses without redesigning the filter has become a crucial topic of interest due to its significance in low-cost applications. Recently the design using fixed word length coefficients has gained importance due to the replacement of multipliers by shifters and adders, which reduces the hardware complexity. Among the various approaches to 2D design, transforming a one-dimensional (1D) filter to 2D by transformation, is reported to be an efficient technique. In this paper, 1D variable digital filters (VDFs) with tunable cut-off frequencies are designed using Farrow structure based interpolation approach, and the sub-filter coefficients in the Farrow structure are made multiplier-less using canonic signed digit (CSD) representation. The resulting performance degradation in the filters is overcome by using artificial bee colony (ABC) optimization. Finally, the optimized 1D VDFs are mapped to 2D using generalized McClellan transformation resulting in low complexity, circularly symmetric 2D VDFs with real-time tunability.

  6. A Comparative Study of Ultra-Low Voltage Digital Circuit Design

    Directory of Open Access Journals (Sweden)

    Aaron Arthurs,

    2012-06-01

    Full Text Available Ultra-low voltage digital circuit design is an active research area, especially for portable applications such as wearable electronics, intelligent remote sensors, implantable medical devices, and energy-harvesting systems. Due to their application scenarios and circuit components, two major goals for these systems are minimizing energy consumption and improving compatibility with low-voltage power supplies and analog components. The most effective solution to achieve these goals is to reduce the supply voltage, which,however, raises the issue of operability. At ultra-low supply voltages, the integrity of digital signals degrades dramatically due to the indifference between active and leakage currents. In addition, the system timing becomes more unpredictable as the impact of process and supply voltage variations being more significant at lower voltages. This paper presents a comparative study among three techniques for designing digital circuits operating at ultra-low voltages, i.e., Schmitt-triggered gate structure, delay insensitive asynchronous logic, and Fully-Depleted Silicon-on-Insulator technology. Results show that despite the trade offs, all eight combinations of these techniques are viable for designing ultra-low voltage circuits. For a given application, the optimum circuit design can be selected from these combinations based on the lowest voltage, the dynamic range, the power budget, the performance requirement, and the available semiconductor process node.

  7. Using a bespoke situated digital kiosk to encourage user participation in healthcare environment design.

    Science.gov (United States)

    Mackrill, J; Marshall, P; Payne, S R; Dimitrokali, E; Cain, R

    2017-03-01

    Involving users through participation in healthcare service and environment design is growing. Existing approaches and toolkits for practitioners and researchers are often paper based involving workshops and other more traditional design approaches such as paper prototyping. The advent of digital technology provides the opportunity to explore new platforms for user participation. This paper presents results from three studies that used a bespoke situated user participation digital kiosk, engaging 33 users in investigating healthcare environment design. The studies, from primary and secondary care settings, allowed participant feedback on each environment and proved a novel, engaging "21st century" way to participate in the appraisal of the design process. The results point toward this as an exciting and growing area of research in developing not just a new method of user participation but also the technology that supports it. Limitations were noted in terms of data validity and engagement with the device. To guide the development of user participation using similar situated digital devices, key lessons and reflections are presented. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  8. Digital IIR filters design using differential evolution algorithm with a controllable probabilistic population size.

    Science.gov (United States)

    Zhu, Wu; Fang, Jian-an; Tang, Yang; Zhang, Wenbing; Du, Wei

    2012-01-01

    Design of a digital infinite-impulse-response (IIR) filter is the process of synthesizing and implementing a recursive filter network so that a set of prescribed excitations results a set of desired responses. However, the error surface of IIR filters is usually non-linear and multi-modal. In order to find the global minimum indeed, an improved differential evolution (DE) is proposed for digital IIR filter design in this paper. The suggested algorithm is a kind of DE variants with a controllable probabilistic (CPDE) population size. It considers the convergence speed and the computational cost simultaneously by nonperiodic partial increasing or declining individuals according to fitness diversities. In addition, we discuss as well some important aspects for IIR filter design, such as the cost function value, the influence of (noise) perturbations, the convergence rate and successful percentage, the parameter measurement, etc. As to the simulation result, it shows that the presented algorithm is viable and comparable. Compared with six existing State-of-the-Art algorithms-based digital IIR filter design methods obtained by numerical experiments, CPDE is relatively more promising and competitive.

  9. A new greedy search method for the design of digital IIR filter

    Directory of Open Access Journals (Sweden)

    Ranjit Kaur

    2015-07-01

    Full Text Available A new greedy search method is applied in this paper to design the optimal digital infinite impulse response (IIR filter. The greedy search method is based on binary successive approximation (BSA and evolutionary search (ES. The suggested greedy search method optimizes the magnitude response and the phase response simultaneously and also finds the lowest order of the filter. The order of the filter is controlled by a control gene whose value is also optimized along with the filter coefficients to obtain optimum order of designed IIR filter. The stability constraints of IIR filter are taken care of during the design procedure. To determine the trade-off relationship between conflicting objectives in the non-inferior domain, the weighting method is exploited. The proposed approach is effectively applied to solve the multiobjective optimization problems of designing the digital low-pass (LP, high-pass (HP, bandpass (BP, and bandstop (BS filters. It has been demonstrated that this technique not only fulfills all types of filter performance requirements, but also the lowest order of the filter can be found. The computational experiments show that the proposed approach gives better digital IIR filters than the existing evolutionary algorithm (EA based methods.

  10. Novel Design of Recursive Differentiator Based on Lattice Wave Digital Filter

    Directory of Open Access Journals (Sweden)

    R. Barsainya

    2017-04-01

    Full Text Available In this paper, a novel design of third and fifth order differentiator based on lattice wave digital filter (LWDF, established on optimizing L_1-error approximation function using cuckoo search algorithm (CSA is proposed. We present a novel realization of minimum multiplier differentiator using LWD structure leading to requirement of optimizing only N coefficients for Nth order differentiator. The gamma coefficients of lattice wave digital differentiator (LWDD are computed by minimizing the L_1-norm fitness function leading to a flat response. The superiority of the proposed LWDD is evident by comparing it with other differentiators mentioned in the literature. The magnitude response of the designed LWDD is found to be of high accuracy with flat response in a wide frequency range. The simulation and statistical results validates that the designed minimum multiplier LWDD circumvents the existing one in terms of minimum absolute magnitude error, mean relative error (dB and efficient structural realization, thereby making the proposed LWDD a promising approach to digital differentiator design.

  11. Solar Hidden Photon Search

    CERN Document Server

    Schwarz, Matthias; Redondo, Javier; Ringwald, Andreas; Wiedemann, Guenter

    2011-01-01

    The Solar Hidden Photon Search (SHIPS) is a joint astroparticle project of the Hamburger Sternwarte and DESY. The main target is to detect the solar emission of a new species of particles, so called Hidden Photons (HPs). Due to kinetic mixing, photons and HPs can convert into each other as they propagate. A small number of solar HPs - originating from photon to HP oscillations in the interior of the Sun - can be converted into photons in a long vacuum pipe pointing to the Sun - the SHIPS helioscope.

  12. Solar Hidden Photon Search

    Energy Technology Data Exchange (ETDEWEB)

    Schwarz, Matthias; Wiedemann, Guenter [Hamburg Univ. (Germany). Sternwarte; Lindner, Axel; Ringwald, Andreas [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Redondo, Javier [Max-Planck-Institut fuer Physik und Astrophysik, Muenchen (Germany)

    2011-11-15

    The Solar Hidden Photon Search (SHIPS) is a joint astroparticle project of the Hamburger Sternwarte and DESY. The main target is to detect the solar emission of a new species of particles, so called Hidden Photons (HPs). Due to kinetic mixing, photons and HPs can convert into each other as they propagate. A small number of solar HPs - originating from photon to HP oscillations in the interior of the Sun - can be converted into photons in a long vacuum pipe pointing to the Sun - the SHIPS helioscope. (orig.)

  13. Knowledge-reuse-oriented Product Modeling and Knowledge Management in Digital Design

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jinsong

    2006-01-01

    Mostly product design knowledge and experience exists in design handbook or expert's brain. During design process, designer has to refer to many handbooks and design materials, and design solution is hard to be reused. In order to deal with these deficiencies in digital design, this paper focuses on knowledge-reuse-oriented product modeling and knowledge management. Design knowledge is used to guide design process, and it is embedded into product model along with design process. Through analyzing design process, mechanical product knowledge is classified into four basic types that include calculation formula, design rule, engineering check and parameter spectrum etc. In order to manage and encapsulate design knowledge the concept of knowledge component(KCOM) is proposed. Design knowledge base can be organized as a hierarchy tree of KCOM. Knowledge reuse in KCOM level is the reuse of whole object in knowledge base, and knowledge reuse in item level is the reuse of basic knowledge type. Finally knowledge reuse approaches between knowledge base and CAD system is presented.

  14. Design of Multi-Valued Quaternary Based Analog-to-Digital Converter

    Directory of Open Access Journals (Sweden)

    A. H.M.Z. Alam

    2009-01-01

    Full Text Available Problem statement: The design of multi-valued quaternary based Analog-to-Digital Converter (ADC circuit was presented. The ADC generates multi-valued logic outputs rather than the conventional binary output system to overall reduction in circuit complexity and size. Approach: Design was implemented using pipeline ADC architecture and was simulated using model parameters based on standard 0.13 µm CMOS process. Results: Performance analysis of the design showed desirable performance parameters in terms of response, low power consumption, and a sampling rate of 10 MHz at a supply voltage of 1.3V was achieved. Conclusion/Recommendations: The ADC design was suitable for the needs of mixed-signal integrated circuit design and can be implemented as a conversion circuit for systems based on multiple-valued logic design.

  15. Learning and Motivational Processes When Students Design Curriculum-Based Digital Learning Games

    DEFF Research Database (Denmark)

    Weitze, Charlotte Lærke

    2015-01-01

    -design process with teachers and students. The learning approach was founded in problem-based learning (PBL) and constructionist pedagogical methodology, building on the thesis that there is a strong connection between designing and learning. The belief is that activities that involve making, building......This design-based research (DBR) project has developed an overall gamified learning design (big Game) to facilitate the learning process for adult students by inviting them to be their own learning designers through designing digital learning games (small games) in cross-disciplinary subject......, or programming provide a rich context for learning, since the construction of artefacts, in this case learning games, enables reflection and new ways of thinking. The students learned from reflection and interaction with the tools alone as well as in collaboration with peers. After analysing the students...

  16. Hyper-chaotic LÜ System Simulation Design of Digital Circuit Based on DSP Builder

    Directory of Open Access Journals (Sweden)

    Zhang Xiaohong

    2013-05-01

    Full Text Available In order to overcome sensitive defects of components deviations and environment defects in analog circuit design, a novel four-dimensional hyperchaotic systems is constructed based on LÜ system. Basic nonlinear dynamics characteristics are analyzed to the new system. By optimizing the design of sampling frequency selection, gain adjustments, parameter configuration etc., the hyperchaotic circuit runs stably while the signal amplitude is reasonably controlled. Curves of the digital chaotic sequence show smooth without jagged shape. The circuit can be applied to other digital realization of chaotic systems with commonality and expandability. Its experimental results fully consistent with phase space structures of the continuous chaotic system, which shows the development of chaotic systems based on FPGA is feasible and practical.

  17. Digital decoupling controller design for multiple time-delay continuous-time transfer function matrices

    Science.gov (United States)

    Xie, L. B.; Wu, C. Y.; Shieh, L. S.; Tsai, J. S. H.

    2015-03-01

    This paper presents an extended adjoint decoupling method to conduct the digital decoupling controller design for the continuous-time transfer function matrices with multiple (integer/fractional) time delays in both the denominator and the numerator matrix. First, based on the sampled unit-step response data of the afore-mentioned multiple time-delay system, the conventional balanced model-reduction method is utilised to construct an approximated discrete-time model of the original (known/unknown) multiple time-delay continuous-time transfer function matrix. Then, a digital decoupling controller is designed by utilising the extended adjoint decoupling method together with the conventional discrete-time root-locus method. An illustrative example is given to demonstrate the effectiveness of the proposed method.

  18. FPGA based sigma –Delta analogue to digital converter design

    Directory of Open Access Journals (Sweden)

    P. A. Uchagaonkar

    2012-03-01

    Full Text Available This paper reports design and development of modified Sigma- Delta ADC realized in FPGA paradigm. The wide gain of this ADC makes it a potential candidate in data converter applications in wide ranging domains such as communication systems, instrumentation, precision measurement devices and manyothers wherein the high resolution precision converter is essential. The proposed architecture encompasses of mixed mode design in which few of the analog and up to 90% digital blocks have been realized on a single platform. The digital building blocks have been tested and implemented in Xilinx ISE with the help of MATLAB system generator tool and instantiated on Spartan 3e FPGA. System performance has been ascertained using the hardware co-simulation and further post verified on the Xilinx analyzer tool.

  19. The design, fabrication, and test of a new VLSI hybrid analog-digital neural processing element

    Science.gov (United States)

    Deyong, Mark R.; Findley, Randall L.; Fields, Chris

    1992-01-01

    A hybrid analog-digital neural processing element with the time-dependent behavior of biological neurons has been developed. The hybrid processing element is designed for VLSI implementation and offers the best attributes of both analog and digital computation. Custom VLSI layout reduces the layout area of the processing element, which in turn increases the expected network density. The hybrid processing element operates at the nanosecond time scale, which enables it to produce real-time solutions to complex spatiotemporal problems found in high-speed signal processing applications. VLSI prototype chips have been designed, fabricated, and tested with encouraging results. Systems utilizing the time-dependent behavior of the hybrid processing element have been simulated and are currently in the fabrication process. Future applications are also discussed.

  20. The design, fabrication, and test of a new VLSI hybrid analog-digital neural processing element

    Science.gov (United States)

    Deyong, Mark R.; Findley, Randall L.; Fields, Chris

    1992-01-01

    A hybrid analog-digital neural processing element with the time-dependent behavior of biological neurons has been developed. The hybrid processing element is designed for VLSI implementation and offers the best attributes of both analog and digital computation. Custom VLSI layout reduces the layout area of the processing element, which in turn increases the expected network density. The hybrid processing element operates at the nanosecond time scale, which enables it to produce real-time solutions to complex spatiotemporal problems found in high-speed signal processing applications. VLSI prototype chips have been designed, fabricated, and tested with encouraging results. Systems utilizing the time-dependent behavior of the hybrid processing element have been simulated and are currently in the fabrication process. Future applications are also discussed.

  1. Uncovering the Hidden Web, Part II: Resources for Your Classroom. ERIC Digest.

    Science.gov (United States)

    Mardis, Marcia

    Too often, search engines don't see and directories can overlook clearinghouses, digital libraries, full-text databases, and learning objects. In contrast, the hidden Web is rich with these high quality and cutting-edge learning materials. By integrating resources from the hidden Web into the classroom, educators extend their instruction in new…

  2. Digital design and experimental validation of high-performance real-time OFDM systems

    OpenAIRE

    Font Bach, Josep Oriol

    2013-01-01

    The goal of this Ph.D. dissertation is to address a number of challenges encountered in the digital baseband design of modern and future wireless communication systems. The fast and continuous evolution of wireless communications has been driven by the ambitious goal of providing ubiquitous services that could guarantee high throughput, reliability of the communication link and satisfy the increasing demand for efficient re-utilization of the heavily populated wireless spectrum. To cope with ...

  3. DIDET: Digital Libraries for Distributed, Innovative Design Education and Teamwork. Final Project Report

    OpenAIRE

    Breslin, Caroline; Grierson, Hilary

    2008-01-01

    The central goal of the DIDET Project was to enhance student learning opportunities by enabling them to partake in global, team based design engineering projects, in which they directly experience different cultural contexts and access a variety of digital information sources via a range of appropriate technology. To achieve this overall project goal, the project delivered on the following objectives: 1. Teach engineering information retrieval, manipulation, and archiving skills to student...

  4. In bits, bytes and stone:Making sense of digital afterlife, remembrance and heritage designs

    OpenAIRE

    Sabra, Jakob Borrits; Andersen, Hans Jørgen

    2015-01-01

    The digital spheres of Information and Communication Technologies (ICT) and Social Network Services (SNS) are influencing 21st. century death. Today the dying and the bereaved attend mourning and remembrance both online and offline. Combined, the cemeteries, web memorials and social network sites constitute parts of an intricately weaved and interrelated network of practices dealing with death, mourning, memorialization and remembrance. Design pioneering company IDEO'S recent failed attempt t...

  5. Design of Spanish digital press in the context of technological convergence. Visual identity of cyber journalism

    Directory of Open Access Journals (Sweden)

    Dra. Mª Ángeles Cabrera González

    2009-01-01

    Full Text Available Abstract: This article tries to define the visual characteristics of Spanish digital newspapers within the digital convergence via an intensive cross-sectional study. For this purpose, the design of the main digital newspapers (El Mundo, El País, Abc, La Vanguardia and La Razón has simultaneously been observed. A heuristic method has been used based on empirical and comparative observation of different cases extracted from quantitative and qualitative data gathering sheets. The variables of the comparative analysis are identified after diachronic and exploratory monitoring of the case of elmundo.es. The final results describe the status of the issue, the main characteristics of digital design, the design features specific to cyber media, the common and particular practices followed by the analyzed media, and the tendencies in the way journalistic messages are visually treated in Internet, such as: colour typography, increase of pictures and multimedia, participation resources and design homogenization.Resumen: Este artículo pretende definir las características visuales de los ciberperiódicos españoles en el contexto de la convergencia digital mediante un estudio transversal e intensivo. Para ello, se observa sincrónicamente el diseño de los principales periódicos digitales (El Mundo, El País, Abc, La Vanguardia y La Razón El método empleado es el análisis heurístico basado en la observación empírica y comparada mediante el estudio de casos a partir de una ficha de recogida de datos cuantitativos y cualitativos. Las variables del análisis comparado se identifican en un seguimiento diacrónico de carácter exploratorio sobre el caso de elmundo.es. Los resultados finales obtenidos describen el estado de la cuestión, las principales características del diseño digital, los rasgos de diseño específicos de los cibermedios, las prácticas comunes y particulares empleadas por los medios analizados, y las tendencias en el tratamiento

  6. Towards the application of interaction design to digital TV content development.

    Science.gov (United States)

    Fialho, Francisco A P; Santos, Paloma Maria; Braga, Marcus de Melo; Thaler, Anelise

    2012-01-01

    Television can be considered one of the main means of mass entertainment. It occupies an important place in people's lives, influencing behavior and creating and/or enforcing consumer's habits and needs. With the advent of Digital Television, a series of new features tend to further impact upon society in many different ways. The main agent of this change is interactivity, which is the leverage that will transform the traditional viewer's role. Interactivity turns the viewer into a user, a partner who receives the content, but also produces, participates and collaborates during the viewing process. This paper aims to discuss the importance of applying interaction design in the development of projects related to digital television. The main factors that may contribute to improve the interaction design in applications for digital TV were identified drawing on a descriptive and qualitative method of investigation. The results showed that the interface design for this new media should not only be aesthetically appealing, but should also focus on usability (i.e. user's wishes and needs). Additionally, the creation of these interfaces requires the investigation of some characteristics and limitations of device interaction, considering the choice of colors, saturation levels and brightness, avoiding graphic symbols and prioritizing the navigation through the numerical buttons of the remote control.

  7. Digital Television Broadcast System Design%数字电视播出系统设计

    Institute of Scientific and Technical Information of China (English)

    黄俊伟

    2014-01-01

    随着我国互联网的影响范围日益扩大,国内有线数字电视取得长足发展,但同样也面临着前所未有的机遇和挑战。对数字电视播出系统设计思路、硬盘部分设计和分控视音频系统的设计进行了探讨,以提高工作效率,推动数字电视的快速发展。%With the impact of widening the scope of the Internet in China, the domestic digital cable TV made considerable progress, but it also faces unprecedented opportunities and challenges. Digital television broadcast system design ideas, design of the hard part of the design and control video and audio systems were discussed in order to improve efficiency, promote the rapid development of digital TV.

  8. Hidden Markov Models for Human Genes

    DEFF Research Database (Denmark)

    Baldi, Pierre; Brunak, Søren; Chauvin, Yves

    1997-01-01

    We analyse the sequential structure of human genomic DNA by hidden Markov models. We apply models of widely different design: conventional left-right constructs and models with a built-in periodic architecture. The models are trained on segments of DNA sequences extracted such that they cover...

  9. Applying Human Factors Evaluation and Design Guidance to a Nuclear Power Plant Digital Control System

    Energy Technology Data Exchange (ETDEWEB)

    Thomas Ulrich; Ronald Boring; William Phoenix; Emily Dehority; Tim Whiting; Jonathan Morrell; Rhett Backstrom

    2012-08-01

    The United States (U.S.) nuclear industry, like similar process control industries, has moved toward upgrading its control rooms. The upgraded control rooms typically feature digital control system (DCS) displays embedded in the panels. These displays gather information from the system and represent that information on a single display surface. In this manner, the DCS combines many previously separate analog indicators and controls into a single digital display, whereby the operators can toggle between multiple windows to monitor and control different aspects of the plant. The design of the DCS depends on the function of the system it monitors, but revolves around presenting the information most germane to an operator at any point in time. DCSs require a carefully designed human system interface. This report centers on redesigning existing DCS displays for an example chemical volume control system (CVCS) at a U.S. nuclear power plant. The crucial nature of the CVCS, which controls coolant levels and boration in the primary system, requires a thorough human factors evaluation of its supporting DCS. The initial digital controls being developed for the DCSs tend to directly mimic the former analog controls. There are, however, unique operator interactions with a digital vs. analog interface, and the differences have not always been carefully factored in the translation of an analog interface to a replacement DCS. To ensure safety, efficiency, and usability of the emerging DCSs, a human factors usability evaluation was conducted on a CVCS DCS currently being used and refined at an existing U.S. nuclear power plant. Subject matter experts from process control engineering, software development, and human factors evaluated the DCS displays to document potential usability issues and propose design recommendations. The evaluation yielded 167 potential usability issues with the DCS. These issues should not be considered operator performance problems but rather opportunities

  10. Task based design of a digital work environment (DWE for an academic community

    Directory of Open Access Journals (Sweden)

    Narayanan Meyyappan

    2002-01-01

    Full Text Available Task based design is considered one of the effective ways of designing functional software. It is generally accepted that tasks play an important role in system and user interface design. Identifying the user's tasks enables the designer to construct user interfaces reflecting the tasks' properties, including efficient usage patterns, easy-to-use interaction sequences, and powerful assistance features. In this paper, we present a prototype of a Digital Work Environment (DWE to support a task-oriented design to information access in a typical community of academic users. The resources in DWE are organized according to specific tasks performed by the research students and staff in the Division of Information Studies of Nanyang Technological University, Singapore. The tasks and resources were elicited based on the needs of faculty and students through interviews and focus groups. Examples of these tasks include preparation of a new course outline, setting of examination papers, preparation of reading lists and assignments, conducting literature reviews and writing dissertations. This paper discusses the problems of digital library users in an academic environment, highlights task oriented projects and focuses on the task of preparing and writing a Master dissertation. It highlights the importance of task based design in assisting and helping students and instructors from the time of selecting the research project to the time of submitting the final bound copies of the dissertation.

  11. Patient innovation: an analysis of patients' designs of digital technology support for everyday living with diabetes.

    Science.gov (United States)

    Kanstrup, Anne Marie; Bertelsen, Pernille; Nohr, Christian

    2015-01-01

    The aim of this paper is to identify characteristics of patients' contributions to innovation in health information technology (HIT). The paper outlines a theoretical definition of patient innovation and presents an analysis of four digital prototypes and 22 low-fidelity mock-ups designed by people affected by the chronic illness diabetes mellitus. Seventeen families (a total of 60 people) with one or more diabetic family members participated in design activities in a four-year research project focused on the design of digital support for everyday living with diabetes. Our analysis documented the originality of the analysed patient designs and identified three characteristics of patients' designs: socio-technical networks, objects with associated personal meanings and technology supporting the expression of identity. The paper concludes that patient innovation is defined by what is perceived as new by patients and/or others within the social system of adaptation. The analysed patient designs are original (as distinct from replications of or improvements on known products), and their characteristics are innovative contributions to the social system of everyday living with diabetes (i.e. they are perceived as new to the patients in the research study). The results of the analysis contribute to the credentials of patients as key actors in HIT innovation and call for participatory approaches in health informatics.

  12. The Digital Story: Designing Professional Development in Technology Integration for Teachers

    Directory of Open Access Journals (Sweden)

    Berta Hayes Capo

    2013-06-01

    Full Text Available A series of three professional development lessons were produced to teach high school teachers how to create their own content specific digital stories for use in their classroom instruction. A systems design method was employed to design the original lesson and also to design the final three lessons. The teachers were local high school teachers of one South Florida high school. The design approach for the lessons was grounded in activity theory. According to a description of activity theory by Jonassen, Tessmer, and Hannum (1999 the subjects use tools to transform objects in order to reach a learning outcome. School leadership and representative teachers expressed a need for technology integration in classroom instruction. Important shortcomings of the original lesson design were that adult learning theory was overlooked. Additionally, the main goal of the lesson was sacrificed to accommodate time constraints, and some of the images provided to complete the lesson contained the wrong aspect ratio. Adults require “self-direction” (Knowles, 1998, and the original lesson design afforded the participating adults little control over the construction process of their digital story. These shortcomings resulted in a need for a redesign of the lesson into three lessons. Furthermore, the final product became a series of three print-based lessons, to be distributed via compact disc to teachers for the upcoming school year.

  13. The Effectiveness of Teaching Methods Used in Graphic Design Pedagogy in Both Analogue and Digital Education Systems

    Science.gov (United States)

    Alhajri, Salman

    2016-01-01

    Purpose: this paper investigates the effectiveness of teaching methods used in graphic design pedagogy in both analogue and digital education systems. Methodology and approach: the paper is based on theoretical study using a qualitative, case study approach. Comparison between the digital teaching methods and traditional teaching methods was…

  14. Design, Implementation, and Lessons Learned from a Digital Storytelling Project in an Undergraduate Health Promotion Theory Course

    Science.gov (United States)

    Rimando, Marylen; Smalley, K. Bryant; Warren, Jacob C.

    2015-01-01

    This article describes the design, implementation and lessons learned from a digital storytelling project in a health promotion theory course. From 2011-2012, 195 health promotion majors completed a digital storytelling project at a Midwestern university. The instructor observed students' understanding of theories and models. This article adds to…

  15. Design Method for Fast Switching Seat Valves for Digital Displacement Machines

    DEFF Research Database (Denmark)

    Roemer, Daniel Beck; Johansen, Per; Pedersen, Henrik C.;

    2014-01-01

    Digital Displacement (DD) machines are upcoming technology where the displacement of each pressure chamber is controlled electronically by use of two fast switching seat valves. The effective displacement and operation type (pumping/motoring) may be controlled by manipulating the seat valves...... operation, where switching times must be performed within a few milliseconds. These valve requirements make a simulation based design approach essential, where mechanical strength, thermal dissipation, fluid dynamics and electro-magnetic dynamics must be taken into account. In this paper a complete design...... of the valves. A coupled optimization is finally conducted to optimize the electro-magnetic actuator, leading to a valve design based on the chosen valve topology. The design method is applied to an example DD machine and the resulting valve design fulfilling the requirements is presented....

  16. Learning and Motivational Processes When Students Design Curriculum‐Based Digital Learning Games

    DEFF Research Database (Denmark)

    Weitze, Charlotte Lærke

    2016-01-01

    design process with teachers and students. The learning approach was founded in problem‐based learning (PBL) and constructionist pedagogical methodology, building on the thesis that there is a strong connection between designing and learning. The belief is that activities that involve making, building......This design‐based research (DBR) project has developed an overall gamified learning design (big Game) to facilitate the learning process for adult students by inviting them to be their own learning designers through designing digital learning games (small games) in cross‐disciplinary subject......, or programming provide a rich context for learning, since the construction of artefacts, in this case learning games, enables reflection and new ways of thinking. The students learned from reflection and interaction with the tools alone as well as in collaboration with peers. After analysing the students...

  17. Functional design standard of on-line digital core protection and monitoring systems for SMART

    Energy Technology Data Exchange (ETDEWEB)

    In, Wang Kee; Kim, Keung Koo; Zee, Sung Qunn [Korea Atomic Energy Research Institute, Taejon (Korea)

    1999-12-01

    The general requirements for the system I/O and the functional design were developed based on the conceptual design of SCOPS and SCOMS for SMART. The reactor trip functions were preliminarily determined to define the design basis events of SCOPS. The sensor requirements for SCOPS and SCOMS were also established. The sensor requirements for SCOPS and SCOMS were also established. The detailed functional design of the SMART digital core protection and monitoring systems will be performed based on the functional design standard in this report. The results of this study will also be useful to determine the reactor trip functions as well as the system and sensor requirements. 3 refs., 2 figs., 5 tabs. (Author)

  18. Design Method for Fast Switching Seat Valves for Digital Displacement Machines

    DEFF Research Database (Denmark)

    Roemer, Daniel Beck; Johansen, Per; Pedersen, Henrik C.

    2014-01-01

    Digital Displacement (DD) machines are upcoming technology where the displacement of each pressure chamber is controlled electronically by use of two fast switching seat valves. The effective displacement and operation type (pumping/motoring) may be controlled by manipulating the seat valves...... operation, where switching times must be performed within a few milliseconds. These valve requirements make a simulation based design approach essential, where mechanical strength, thermal dissipation, fluid dynamics and electro-magnetic dynamics must be taken into account. In this paper a complete design...... of the valves. A coupled optimization is finally conducted to optimize the electro-magnetic actuator, leading to a valve design based on the chosen valve topology. The design method is applied to an example DD machine and the resulting valve design fulfilling the requirements is presented....

  19. Preliminary design of an advanced programmable digital filter network for large passive acoustic ASW systems. [Parallel processor

    Energy Technology Data Exchange (ETDEWEB)

    McWilliams, T.; Widdoes, Jr., L. C.; Wood, L.

    1976-09-30

    The design of an extremely high performance programmable digital filter of novel architecture, the LLL Programmable Digital Filter, is described. The digital filter is a high-performance multiprocessor having general purpose applicability and high programmability; it is extremely cost effective either in a uniprocessor or a multiprocessor configuration. The architecture and instruction set of the individual processor was optimized with regard to the multiple processor configuration. The optimal structure of a parallel processing system was determined for addressing the specific Navy application centering on the advanced digital filtering of passive acoustic ASW data of the type obtained from the SOSUS net. 148 figures. (RWR)

  20. Design of a digital ride quality augmentation system for commuter aircraft

    Science.gov (United States)

    Hammond, T. A.; Amin, S. P.; Paduano, J. D.; Downing, D. R.

    1984-01-01

    Commuter aircraft typically have low wing loadings, and fly at low altitudes, and so they are susceptible to undesirable accelerations caused by random atmospheric turbulence. Larger commercial aircraft typically have higher wing loadings and fly at altitudes where the turbulence level is lower, and so they provide smoother rides. This project was initiated based on the goal of making the ride of the commuter aircraft as smooth as the ride experienced on the major commercial airliners. The objectives of this project were to design a digital, longitudinal mode ride quality augmentation system (RQAS) for a commuter aircraft, and to investigate the effect of selected parameters on those designs.

  1. Digital controller design: Analysis of the annular suspension pointing system. [analog controllers with feedback

    Science.gov (United States)

    Kuo, B. C.

    1978-01-01

    The analog controllers of the annular suspension pointing system are designed for control of the chi, phi sub 1, and phi sub 2 bandwidth dynamics through decoupling and pole placement. Since it is virtually impossible to find an equivalent bandwidth of the overall system and establish a general eigenvalue requirement for the system, the subsystem dynamics are decoupled through state feedback and the poles are placed simultaneously to realize the desired bandwidths for the three system components. Decoupling and pole placement are also used to design the closed-loop digital system through approximation.

  2. Digital VLSI design with Verilog a textbook from Silicon Valley Technical Institute

    CERN Document Server

    Williams, John

    2008-01-01

    This unique textbook is structured as a step-by-step course of study along the lines of a VLSI IC design project. In a nominal schedule of 12 weeks, two days and about 10 hours per week, the entire verilog language is presented, from the basics to everything necessary for synthesis of an entire 70,000 transistor, full-duplex serializer - deserializer, including synthesizable PLLs. Digital VLSI Design With Verilog is all an engineer needs for in-depth understanding of the verilog language: Syntax, synthesis semantics, simulation, and test. Complete solutions for the 27 labs are provided on the

  3. The Art of Hardware Architecture Design Methods and Techniques for Digital Circuits

    CERN Document Server

    Arora, Mohit

    2012-01-01

    This book highlights the complex issues, tasks and skills that must be mastered by an IP designer, in order to design an optimized and robust digital circuit to solve a problem. The techniques and methodologies described can serve as a bridge between specifications that are known to the designer and RTL code that is final outcome, reducing significantly the time it takes to convert initial ideas and concepts into right-first-time silicon.� Coverage focuses on real problems rather than theoretical concepts, with an emphasis on design techniques across various aspects of chip-design.�� Describes techniques to help IP designers get it right the first time, creating designs optimized in terms of power, area and performance; Focuses on practical aspects of chip design and minimizes theory; Covers chip design in a consistent way, starting with basics and gradually developing advanced concepts, such as electromagnetic compatibility (EMC) design techniques and low-power design techniques such as dynamic voltage...

  4. Design of Intelligent Digital Pressure Gauge%智能数字压力表设计

    Institute of Scientific and Technical Information of China (English)

    薛利凯; 王玉滨

    2011-01-01

    This paper describes the design of intelligent digital pressure gauge, change the design uses a piezoresistive pressure sensor, generally divided into pressure module and the host part of the design. The former specifically includes the collection pressure signal, temperature compensation of the processing, power management, the central control module parts of the design, the most important of which is the power management circuitry and stress-modules and digital communications between computer design,%本文主要介绍了智能数字压力表的设计,改设计采用压阻式压力传感器,总体上分为压力模块和主机部分的设计。前者具体说包括压力信号的采集、温度补偿的处理、电源管理、中央控制模块几部分的设计,后者中最重要的则是电源管理电路和与压力模块及微机问的数字通讯的设计。

  5. Design concepts for a nuclear digital instrumentation and control system platform

    Energy Technology Data Exchange (ETDEWEB)

    Ou, T. C.; Chen, C. K.; Chen, P. J.; Shyu, S. S.; Lee, C. L. [Institute of Nuclear Energy Research, Atomic Energy Council, No. 1000 Wenhua Rd., Jiaan Village, Longtan Township, Taoyuan County 32546 Taiwan (China); Hsieh, S. F., E-mail: tcou@iner.gov.t [Electronics Group, Formosa Plastics Co., 100 Sue-Guan Road, Jen-Wu Hsiang, Kaohsiung County, Taiwan (China)

    2010-10-15

    The objective of this paper is to present the development results of the nuclear instrumentation and control system in Taiwan. As the Taiwan nuclear power plants age, the need to consider upgrading of both their safety and non-safety-related instrumentation and control systems becomes more urgent. Meanwhile, the digital instrumentation and control system that is based on current fast evolving electronic and information technologies are difficult to maintain effectively. Therefore, Institute of Nuclear Energy Research was made a decision to promote the Taiwan Nuclear Instrumentation and Control System project to collaborate with domestic electronic industry to establish self-reliant capabilities on the design, manufacturing, and application of nuclear instrumentation and control systems with newer technology. In the case of safety-related applications like nuclear instrumentation and control, safety-oriented quality control is required. In order to establish a generic qualified digital platform, the world-wide licensing experience should be considered in the licensing process. This paper describes the qualification and certification tools by IEC 61508 for design and development of safety related equipment and explains the basis for many decisions made while performing the digital upgrade. (Author)

  6. Design and Implementation of an Embedded Digital Throwing System Based on MEMS Multiaxial Accelerometer

    Directory of Open Access Journals (Sweden)

    Zhen GAO

    2010-04-01

    Full Text Available This paper presents a novel embedded digital throwing system for synchronously sensing the throwing force of shot-put athletes in real time. The three axes integrated accelerometer, as a crucial device in the force sensing system, can acquire the kinetics data along three orthogonal directions with reasonably high accuracy. The digital shot with almost the same size and weight as the standard shot for open female has been designed, fabricated and implemented. The mechanical structure, signal processing system, and human-machine interface are illuminated in detail. In this manner, the force sensing system serves as a powerful tool for coaches and sports scientists to make scientific researches on professional throwing techniques. It also provides an intuitive and reliable guidance for the throwing athletes to improve their skills.

  7. A Digital-Based Optimal AVR Design of Synchronous Generator Exciter Using LQR Technique

    Directory of Open Access Journals (Sweden)

    Ibraheem Kasim Ibraheem

    2011-01-01

    Full Text Available In this paper a new structure for the AVR of the power system exciter is proposed and designed using digital-based LQR. With two weighting matrices R and Q, this method produces an optimal regulator that is used to generate the feedback control law. These matrices are called state and control weighting matrices and are used to balance between the relative importance of the input and the states in the cost function that is being optimized. A sample power system composed of single machine connected to an infinite- bus bar (SMIB with both a conventional and a proposed Digital AVR (DAVR is simulated. Evaluation results show that the DAVR damps well the oscillations of the terminal voltage and presents a faster response than that of the conventional AVR.

  8. Design and Implementation of Digital Notice Board Using Power Line Communication

    Directory of Open Access Journals (Sweden)

    R.Pudumai Nayagi

    2013-04-01

    Full Text Available Power line communication is one of the emergent technologies used in a cost effective and high speed communications of digital and voice data. It has been used successfully in many real time applications. The paper proposes one such application for automating an educational institution by replacing manual notice boards or circulars by digital notice boards. With a centralized database, frequent updating is easily possible. The system uses existing power lines to send the data to a specific node or to broadcast to various power line nodes. The address is assigned to each receiver and it response based on their appropriate commands. The information to be displayed is received from the main server and at reception each node checks the password and displays it. The design consists of a PC, PLC modem,controller kit and an LCD. The proposed model with a wired communication is better than the wireless communication system.

  9. On-glass automotive diversity antenna and LNA design for S-band satellite digital radio

    Science.gov (United States)

    Yeğin, Korkut

    2015-11-01

    Selection combining diversity system with antennas mounted on windshield and backlite of a vehicle is proposed for satellite digital audio radio applications. Standalone exterior mount antennas on metallic vehicles perform well for satellite digital audio radio applications, but for composite body vehicles or interior mount antennas, antenna performance becomes a real issue. Proposed on-glass two-antenna diversity is one solution for such applications. The antenna correlation is calculated using the S-parameters of the antennas and found to be very low due to many wavelengths separation between the antennas. Design of low noise amplifier, which has sub 1 dB noise figure and good P1dB due to strong cellular signals, is also detailed. A diversity receiver is described and ride tests are performed to assess the performance of the diversity system in real-time, under weak satellite signal environment which is regarded as the most challenging reception condition.

  10. Design of Stable Circularly Symmetric Two-Dimensional GIC Digital Filters Using PLSI Polynomials

    Directory of Open Access Journals (Sweden)

    K. Ramar

    2007-01-01

    Full Text Available A method for designing stable circularly symmetric two-dimensional digital filters is presented. Two-dimensional discrete transfer functions of the rotated filters are obtained from stable one-dimensional analog-filter transfer functions by performing rotation and then applying the double bilinear transformation. The resulting filters which may be unstable due to the presence of nonessential singularities of the second kind are stabilized by using planar least-square inverse polynomials. The stabilized rotated filters are then realized by using the concept of generalized immittance converter. The proposed method is simple and straight forward and it yields stable digital filter structures possessing many salient features such as low noise, low sensitivity, regularity, and modularity which are attractive for VLSI implementation.

  11. The design and characterization of a digital optical breast cancer imaging system.

    Science.gov (United States)

    Flexman, Molly L; Li, Yang; Bur, Andres M; Fong, Christopher J; Masciotti, James M; Al Abdi, Rabah; Barbour, Randall L; Hielscher, Andreas H

    2008-01-01

    Optical imaging has the potential to play a major role in breast cancer screening and diagnosis due to its ability to image cancer characteristics such as angiogenesis and hypoxia. A promising approach to evaluate and quantify these characteristics is to perform dynamic imaging studies in which one monitors the hemodynamic response to an external stimulus, such as a valsalva maneuver. It has been shown that the response to such stimuli shows MARKED differences between cancerous and healthy tissues. The fast imaging rates and large dynamic range of digital devices makes them ideal for this type of imaging studies. Here we present a digital optical tomography system designed specifically for dynamic breast imaging. The instrument uses laser diodes at 4 different near-infrared wavelengths with 32 sources and 128 silicon photodiode detectors.

  12. Bridging the Gap between Actors and Digital tools in a Knotworking Design Process

    DEFF Research Database (Denmark)

    Rasmussen, Mai; Gade, Anne Nørkjær; Jensen, Rasmus Lund

    The high level of complexity in today’s building design requires a high level of inter-disciplinary collaboration, which historically is an uncommon working method in the building industry. To support the inter-disciplinary collaboration, new digital tools such as Building Information Models (BIM......) and Virtual Reality (VR) have been developed to be implemented in various phases of the building project. The implementation of BIM is expected to support the designers and improve the collaboration among multiple actors, but the social aspects related to the use of BIM in the design process needs further...... of a new building at Aalborg University in Denmark. Two design workshops of one day each were held with two weeks in between aiming to furnish 5000 square meters. 20 actors were gathered for the workshop where BIM was used as a real-time 3D visualization tool, in the form of an interactive screen where...

  13. A 8 bits Pipeline Analog to Digital Converter Design for High Speed Camera Application

    CERN Document Server

    Prasetyo, Eri; Ginhac, Nurul Huda Dominique; Paindavoine, Michel

    2008-01-01

    - This paper describes a pipeline analog-to-digital converter is implemented for high speed camera. In the pipeline ADC design, prime factor is designing operational amplifier with high gain so ADC have been high speed. The other advantage of pipeline is simple on concept, easy to implement in layout and have flexibility to increase speed. We made design and simulation using Mentor Graphics Software with 0.6 \\mu m CMOS technology with a total power dissipation of 75.47 mW. Circuit techniques used include a precise comparator, operational amplifier and clock management. A switched capacitor is used to sample and multiplying at each stage. Simulation a worst case DNL and INL of 0.75 LSB. The design operates at 5 V dc. The ADC achieves a SNDR of 44.86 dB. keywords: pipeline, switched capacitor, clock management

  14. Design of an interactive digital nutritional education package for elderly people.

    Science.gov (United States)

    Ali, Nazlena Mohamad; Shahar, Suzana; Kee, You Lee; Norizan, Azir Rezha; Noah, Shahrul Azman Mohd

    2012-12-01

    Designing a system for the elderly is crucial, as aging is associated with physiological changes that may impair perception, cognition and other social aspects; therefore, many aspects need consideration, especially in interface design. This study was conducted to develop a digital nutritional education package (WE Sihat) by following appropriate guidelines for elderly people to achieve better design interface and interaction. Touch-screen technology was used as a platform for user interaction. The nutritional content was based on previous nutrition studies and a lifestyle education package on healthy aging, which contains four modules. The questionnaires were distributed to 31 Malay subjects aged 60-76 years old, containing an evaluation about the overall content, graphics, design layout, colour, font size, audio/video, user-perceived satisfaction and acceptance levels. The findings showed positive feedback and acceptance. Most subjects agreed that the digital nutritional education package can increase their nutritional knowledge for a healthy lifestyle and is easy to use. The touch-screen technology was also well accepted by elderly people and can be used as a kiosk for disseminating nutrition education for healthy aging.

  15. Assessing Digital Student Productions, a Design-Based Research Study on the Development of a Criteria-Based Assessment Tool for Students’ Digital Multimodal Productions

    DEFF Research Database (Denmark)

    Hoffmeyer, Mikkeline; Jensen, Jesper Juellund; Olsen, Marie Veisegaard

    2016-01-01

    productions is often vague or lacking. Therefore, the research project aims at developing a tool to support assessment of student’s digital multimodal productions through a design-based research method. This paper presents a proposal for issues to be considered through a prototyping phase, based on interviews...

  16. Hidden neural networks

    DEFF Research Database (Denmark)

    Krogh, Anders Stærmose; Riis, Søren Kamaric

    1999-01-01

    A general framework for hybrids of hidden Markov models (HMMs) and neural networks (NNs) called hidden neural networks (HNNs) is described. The article begins by reviewing standard HMMs and estimation by conditional maximum likelihood, which is used by the HNN. In the HNN, the usual HMM probability...... parameters are replaced by the outputs of state-specific neural networks. As opposed to many other hybrids, the HNN is normalized globally and therefore has a valid probabilistic interpretation. All parameters in the HNN are estimated simultaneously according to the discriminative conditional maximum...... likelihood criterion. The HNN can be viewed as an undirected probabilistic independence network (a graphical model), where the neural networks provide a compact representation of the clique functions. An evaluation of the HNN on the task of recognizing broad phoneme classes in the TIMIT database shows clear...

  17. Coupling of Hidden Sector

    CERN Document Server

    Królikowski, Wojciech

    2016-01-01

    A hypothetic Hidden Sector of the Universe, consisting of sterile fermions ("sterinos") and sterile mediating bosons ("sterons") of mass dimension 1 (not 2!) - the last described by an antisymmetric tensor field - requires to exist also a scalar isovector and scalar isoscalar in order to be able to construct electroweak invariant coupling (before spontaneously breaking its symmetry). The introduced scalar isoscalar might be a resonant source for the diphoton excess of 750 GeV, suggested recently by experiment.

  18. Designing the future of talking therapy: Using digital health to improve outcomes in psychosis

    Directory of Open Access Journals (Sweden)

    Amy Hardy

    2016-01-01

    We initiated the first UK collaboration of healthcare design researchers, digital health experts and clinician academics to develop a digital design solution to improve therapy outcomes in psychosis. Our user-centred inclusive design approach was informed by the Design Council’s (2005 double diamond method consisting of discover, define, develop and deliver phases (see Figure One. As an inclusive design project, stakeholders (service users, clinicians and researchers were involved from the outset, with interviews iteratively conducted to generate and validate hypotheses regarding possible design solutions. In the 'discover' phase our research included literature review, observing therapy sessions, system mapping of the contexts in which therapy was delivered, together with research into behaviour change models and new technologies. Workshops were held at the 'define' phase to synthesise the research insights, from which the area for achieving maximum impact on outcomes and the aim of the eventual design brief were defined. The insights highlighted the need to improve the efficiency of the in-session process, for service users to feel more supported outside of sessions, and to improve the enjoyment of the therapy experience, whilst reducing information processing demands. We therefore aimed to explore the potential for mobile technologies to support the delivery of the therapy. In the 'develop' phase, during collaborative ideation workshops, we generated over 60 concepts. Working closely with service users and clinicians, we gradually distilled them and developed three concepts: bubbles, where thoughts are visualised as bubbles that can be influenced by our actions; journey, where therapy is a journey with incremental progress, challenges and achievements; and interaction, which focuses

  19. Designing, Prototyping and Evaluating Digital Mindfulness Applications: A Case Study of Mindful Breathing for Stress Reduction

    Science.gov (United States)

    Hedman, Anders; Feng, Shuo; Li, Haibo; Osika, Walter

    2017-01-01

    Background During the past decade, there has been a rapid increase of interactive apps designed for health and well-being. Yet, little research has been published on developing frameworks for design and evaluation of digital mindfulness facilitating technologies. Moreover, many existing digital mindfulness applications are purely software based. There is room for further exploration and assessment of designs that make more use of physical qualities of artifacts. Objective The study aimed to develop and test a new physical digital mindfulness prototype designed for stress reduction. Methods In this case study, we designed, developed, and evaluated HU, a physical digital mindfulness prototype designed for stress reduction. In the first phase, we used vapor and light to support mindful breathing and invited 25 participants through snowball sampling to test HU. In the second phase, we added sonification. We deployed a package of probes such as photos, diaries, and cards to collect data from users who explored HU in their homes. Thereafter, we evaluated our installation using both self-assessed stress levels and heart rate (HR) and heart rate variability (HRV) measures in a pilot study, in order to measure stress resilience effects. After the experiment, we performed a semistructured interview to reflect on HU and investigate the design of digital mindfulness apps for stress reduction. Results The results of the first phase showed that 22 of 25 participants (88%) claimed vapor and light could be effective ways of promoting mindful breathing. Vapor could potentially support mindful breathing better than light (especially for mindfulness beginners). In addition, a majority of the participants mentioned sound as an alternative medium. In the second phase, we found that participants thought that HU could work well for stress reduction. We compared the effect of silent HU (using light and vapor without sound) and sonified HU on 5 participants. Subjective stress levels were

  20. A Digital Interface for the Part Designers and the Fixture Designers for a Reconfigurable Assembly System

    Directory of Open Access Journals (Sweden)

    Vishwa V. Kumar

    2013-01-01

    Full Text Available This paper presents a web-based framework for interfacing product designers and fixture designers to fetch the benefits of early supplier involvement (ESI to a reconfigurable assembly system (RAS. The interfacing of the two members requires four steps, namely, collaboration chain, fixture supplier selection, knowledge share, and accommodation of service facilities so as to produce multiple products on a single assembly line. The interfacing not only provokes concurrency in the activities of product and fixture designer but also enables the assembly systems to tackle the spatial and generational variety. Among the four stages of interfacing, two steps are characterized by optimization issues, one from the product customer side and the other from the fixture designer side. To impart promptness in the optimization and hence the interaction, computationally economic tools are also presented in the paper for both of the supplier selection and fixture design optimization.

  1. DESIGN OF A DIGITAL SIGNATURE SCHEME BASED ON FACTORING AND DISCRETE LOGARITHMS

    Institute of Scientific and Technical Information of China (English)

    杨利英; 覃征; 胡广伍; 王志敏

    2004-01-01

    Objective Focusing on the security problem of authentication and confidentiality in the context of computer networks, a digital signature scheme was proposed based on the public key cryptosystem. Methods Firstly, the course of digital signature based on the public key cryptosystem was given. Then, RSA and ELGamal schemes were described respectively. They were the basis of the proposed scheme. Generalized ELGamal type signature schemes were listed. After comparing with each other, one scheme, whose Signature equation was (m+r)x=j+s modΦ(p) , was adopted in the designing. Results Based on two well-known cryptographic assumptions, the factorization and the discrete logarithms, a digital signature scheme was presented. It must be required that s' was not equal to p'q' in the signing procedure, because attackers could forge the signatures with high probabilities if the discrete logarithms modulo a large prime were solvable. The variable public key "e" is used instead of the invariable parameter "3" in Harns signature scheme to enhance the security. One generalized ELGamal type scheme made the proposed scheme escape one multiplicative inverse operation in the signing procedure and one modular exponentiation in the verification procedure. Conclusion The presented scheme obtains the security that Harn's scheme was originally claimed. It is secure if the factorization and the discrete logarithms are simultaneously unsolvable.

  2. New Design for Rapid Prototyping of Digital Master Casts for Multiple Dental Implant Restorations

    Science.gov (United States)

    Romero, Luis; Jiménez, Mariano; Espinosa, María del Mar; Domínguez, Manuel

    2015-01-01

    Aim This study proposes the replacement of all the physical devices used in the manufacturing of conventional prostheses through the use of digital tools, such as 3D scanners, CAD design software, 3D implants files, rapid prototyping machines or reverse engineering software, in order to develop laboratory work models from which to finish coatings for dental prostheses. Different types of dental prosthetic structures are used, which were adjusted by a non-rotatory threaded fixing system. Method From a digital process, the relative positions of dental implants, soft tissue and adjacent teeth of edentulous or partially edentulous patients has been captured, and a maser working model which accurately replicates data relating to the patients oral cavity has been through treatment of three-dimensional digital data. Results Compared with the conventional master cast, the results show a significant cost savings in attachments, as well as an increase in the quality of reproduction and accuracy of the master cast, with the consequent reduction in the number of patient consultation visits. The combination of software and hardware three-dimensional tools allows the optimization of the planning of dental implant-supported rehabilitations protocol, improving the predictability of clinical treatments and the production cost savings of master casts for restorations upon implants. PMID:26696528

  3. Digital utopias and real cities—computer-generated images in re-design of public space

    Directory of Open Access Journals (Sweden)

    Marianna Michałowska

    2015-12-01

    Full Text Available Virtual environments are seen nowadays as extensions of our physical activities in the city. Are people, however, aware what the digitally mediated cities they live in are? The starting point of my paper is a question of how computer-generated images (CGIs influence human perception of real space. I am interested in the conflict between a vision and reality, which occurs when an architectural project materialises in a public space and is subsequently rejected by the inhabitants. To explain this conflict, I will use the notion of digital utopias and compare CGIs with the great tradition of “paper” architecture. I will analyse two case studies from a medium-sized Polish city—Poznań. The first case is a redevelopment of the Main Railway Station; the second is a re-design of a local square in Poznań. The analysis focuses on the ambiguity of CGIs used to advertise new investments. The Station in the phase of digital visualisation was appreciated by the Poznań inhabitants but when the project was finally realised, strong criticism of its users followed. The second one provoked public protests already in the phase of visualisation. In conclusion, I state that the concept of agonistic public spaces should be expanded and its virtual dimension should be taken into consideration as well. When dealing with hyper-realistic CGIs, we experience a certain utopia. Confronted with their material execution, we often experience dystopian disillusion which stirs us into action.

  4. Design and Construction of Massive Digital Orthophoto Map Database in China

    Science.gov (United States)

    Yang, Mei; Liu, Jianjun; Zhang, Yuanjie; Li, Xuemei

    2016-06-01

    Digital orthophoto maps have great advantages of high precision, plentiful information, fine intuition and visualization and convenient acquisition, as one of the most important part of national spatial data infrastructure (NSDI), and a type of required data resources in geo-spatial industry.Within last few years, large volume of high-resolution remotely sensed images have become available, obtained by various remotely sensed platforms. The acquired remotely sensed images continuously increasing by exponential order have brought a series of problems about storage, management, distribution and applications of massive image data. The objectives of the following research is to investigate how to design and construct national digital orthophoto map database which is mainly constituted by domestic remotely sensed images. In this paper, according to technical characteristics of national fundamental geo-information image database, we analyzed and then put forward the demands and functions of multi-source and massive database of digital orthophoto maps, and constructed an example of DOM database primarily on the basis of domestic remoted images such as ZY-3 and TH-1.

  5. Access to digital library databases in higher education: design problems and infrastructural gaps.

    Science.gov (United States)

    Oswal, Sushil K

    2014-01-01

    After defining accessibility and usability, the author offers a broad survey of the research studies on digital content databases which have thus far primarily depended on data drawn from studies conducted by sighted researchers with non-disabled users employing screen readers and low vision devices. This article aims at producing a detailed description of the difficulties confronted by blind screen reader users with online library databases which now hold most of the academic, peer-reviewed journal and periodical content essential for research and teaching in higher education. The approach taken here is borrowed from descriptive ethnography which allows the author to create a complete picture of the accessibility and usability problems faced by an experienced academic user of digital library databases and screen readers. The author provides a detailed analysis of the different aspects of accessibility issues in digital databases under several headers with a special focus on full-text PDF files. The author emphasizes that long-term studies with actual, blind screen reader users employing both qualitative and computerized research tools can yield meaningful data for the designers and developers to improve these databases to a level that they begin to provide an equal access to the blind.

  6. Characterization of Fundamental Logics for the Sub-Threshold Digital Design

    Institute of Scientific and Technical Information of China (English)

    Yan-Ming He; Ya-Juan He; Yang-Ming Li; Shao-Wei Zhen; Ping Luo

    2013-01-01

    Digital circuits operating in the sub-threshold regime consume the least energy. The strict energy constraints are desired in the applications which work at the lowest possible supply voltage. On the other hand, the conventional design flow utilizes the technology library provided by the foundry with a fixed voltage boundary, which causes problems when the supply scales down to the sub-threshold regime. In this paper, we present a design methodology to characterize the existing cell library with Liberty NCX to facilitate the standard design flow. It is demonstrated in 0.13μm complementary metal-oxide-semiconductor (CMOS) technology with the supply voltage of 300 mV.

  7. Hidden variables and hidden time in quantum theory

    OpenAIRE

    Kurakin, Pavel V.

    2005-01-01

    Bell's theorem proves only that hidden variables evolving in true physical time can't exist; still the theorem's meaning is usually interpreted intolerably wide. The concept of hidden time (and, in general, hidden space-time) is introduced. Such concept provides a whole new class of physical theories, fully compatible with current knowledge, but giving new tremendous possibilities. Those theories do not violate Bell's theorem.

  8. Characterization and Design of Digital Pointing Subsystem for Optical Communication Demonstrator

    Science.gov (United States)

    Racho, C.; Portillo, A.

    1998-01-01

    The Optical Communications Demonstrator (OCD) is a laboratory-based lasercom demonstration terminal designed to validate several key technologies, including beacon acquisition, high bandwidth tracking, precision bearn pointing, and point-ahead compensation functions. It has been under active development over the past few years. The instrument uses a CCD array detector for both spatial acquisition and high-bandwidth tracking, and a fiber coupled laser transmitter. The array detector tracking concept provides wide field-of-view acquisition and permits effective platform jitter compensation and point-ahead control using only one steering mirror. This paper describes the detailed design and characterization of the digital control loop system which includes the Fast Steering Mirror (FSM), the CCD image tracker, and the associated electronics. The objective is to improve the overall system performance using laboratory measured data. The. design of the digital control loop is based on a linear time invariant open loop model. The closed loop performance is predicted using the theoretical model. With the digital filter programmed into the OCD control software, data is collected to verify the predictions. This paper presents the results of the, system modeling and performance analysis. It has been shown that measurement data closely matches theoretical predictions. An important part of the laser communication experiment is the ability of FSM to track the laser beacon within the. required tolerances. The pointing must be maintained to an accuracy that is much smaller than the transmit signal beamwidth. For an earth orbit distance, the system must be able to track the receiving station to within a few microradians. The failure. to do so will result in a severely degraded system performance.

  9. Design of two digital radiation tolerant integrated circuits for high energy physics experiments data readout

    CERN Document Server

    Bonacini, Sandro

    2003-01-01

    High Energy Physics research (HEP) involves the design of readout electron- ics for its experiments, which generate a high radiation ¯eld in the detectors. The several integrated circuits placed in the future Large Hadron Collider (LHC) experiments' environment have to resist the radiation and carry out their normal operation. In this thesis I will describe in detail what, during my 10-months partic- ipation in the digital section of the Microelectronics group at CERN, I had the possibility to work on: - The design of a radiation-tolerant data readout digital integrated cir- cuit in a 0.25 ¹m CMOS technology, called \\the Kchip", for the CMS preshower front-end system. This will be described in Chapter 3. - The design of a radiation-tolerant SRAM integrated circuit in a 0.13 ¹m CMOS technology, for technology radiation testing purposes and fu- ture applications in the HEP ¯eld. The SRAM will be described in Chapter 4. All the work has carried out under the supervision and with the help of Dr. Kostas Klouki...

  10. A SystemC-Based Design Methodology for Digital Signal Processing Systems

    Directory of Open Access Journals (Sweden)

    Christian Haubelt

    2007-03-01

    Full Text Available Digital signal processing algorithms are of big importance in many embedded systems. Due to complexity reasons and due to the restrictions imposed on the implementations, new design methodologies are needed. In this paper, we present a SystemC-based solution supporting automatic design space exploration, automatic performance evaluation, as well as automatic system generation for mixed hardware/software solutions mapped onto FPGA-based platforms. Our proposed hardware/software codesign approach is based on a SystemC-based library called SysteMoC that permits the expression of different models of computation well known in the domain of digital signal processing. It combines the advantages of executability and analyzability of many important models of computation that can be expressed in SysteMoC. We will use the example of an MPEG-4 decoder throughout this paper to introduce our novel methodology. Results from a five-dimensional design space exploration and from automatically mapping parts of the MPEG-4 decoder onto a Xilinx FPGA platform will demonstrate the effectiveness of our approach.

  11. [Design of portable 12-lead digital ECG with low power consumption].

    Science.gov (United States)

    Sheng, Chuanguang; Yang, Cuiwei; Wu, Xiaomei; Wang, Yuanyuan; Qin, Yajie

    2013-11-01

    The design of portable and low power consumption 12-lead ECG is based on the digital signal processor TMS320C5515 and the analog front end ADS1298. The ADS1298 collects the ECG signals and deliver them to TMS320C5515. The preprocessed ECG signals are displayed real-time on a LCD and can be stored without compression for a long time. The ECG signals can also be sent to an up computer by a USB connector so that ECG data can be analyzed offline. The system has small volume, high precision and low power consumption.

  12. Design of an Advertisement Scenario for Electric Vehicles Using Digital Multimedia Broadcasting

    Science.gov (United States)

    Lee, Junghoon; Kim, Hye-Jin; Shin, In-Hye; Cho, Jason; Lee, Sang Joon; Kwak, Ho-Young

    This paper designs an integrative advertisement system based on digital multimedia broadcasting for the electric vehicles, which need a lot of driving information for battery efficiency and charge planning. The advertiser interface interacts with the advertisement processing system to pay the fee and have the contents endorsed. The advertisement contents are registered, monitored, encoded, and finally delivered to vehicles according to the contract via the broadcasting center. Here, this paper defines a new frame format on the data service stream and is in the process of developing and verifying the encoder and decoder modules. Our system is expected to provide the fundamentals for the development of diverse electric vehicle services.

  13. Digital Smile Design Meets the Dento-Facial Analyzer: Optimizing Esthetics While Preserving Tooth Structure.

    Science.gov (United States)

    Tak On, Tse; Kois, John C

    2016-01-01

    This case of an adult male patient with missing maxillary lateral incisors who was unhappy with his smile focuses on implementation of the digital smile design (DSD) concept. Combined with the use of a dento-facial analyzer, DSD, which employs a series of extraoral photographs, allowed the clinician to preoperatively plan different approaches to the treatment and visualize the outcome of each one, as well as to effectively communicate critical tooth position references to the laboratory technician and the patient. The additive approach used in this case minimized tooth preparation while creating an esthetic smile.

  14. Accelerating Digital Mental Health Research From Early Design and Creation to Successful Implementation and Sustainment.

    Science.gov (United States)

    Mohr, David C; Lyon, Aaron R; Lattie, Emily G; Reddy, Madhu; Schueller, Stephen M

    2017-05-10

    Mental health problems are common and pose a tremendous societal burden in terms of cost, morbidity, quality of life, and mortality. The great majority of people experience barriers that prevent access to treatment, aggravated by a lack of mental health specialists. Digital mental health is potentially useful in meeting the treatment needs of large numbers of people. A growing number of efficacy trials have shown strong outcomes for digital mental health treatments. Yet despite their positive findings, there are very few examples of successful implementations and many failures. Although the research-to-practice gap is not unique to digital mental health, the inclusion of technology poses unique challenges. We outline some of the reasons for this gap and propose a collection of methods that can result in sustainable digital mental health interventions. These methods draw from human-computer interaction and implementation science and are integrated into an Accelerated Creation-to-Sustainment (ACTS) model. The ACTS model uses an iterative process that includes 2 basic functions (design and evaluate) across 3 general phases (Create, Trial, and Sustain). The ultimate goal in using the ACTS model is to produce a functioning technology-enabled service (TES) that is sustainable in a real-world treatment setting. We emphasize the importance of the service component because evidence from both research and practice has suggested that human touch is a critical ingredient in the most efficacious and used digital mental health treatments. The Create phase results in at least a minimally viable TES and an implementation blueprint. The Trial phase requires evaluation of both effectiveness and implementation while allowing optimization and continuous quality improvement of the TES and implementation plan. Finally, the Sustainment phase involves the withdrawal of research or donor support, while leaving a functioning, continuously improving TES in place. The ACTS model is a step

  15. Computer Aided Design in Digital Human Modeling for Human Computer Interaction in Ergonomic Assessment: A Review

    Directory of Open Access Journals (Sweden)

    Suman Mukhopadhyay , Sanjib Kumar Das and Tania Chakraborty

    2012-12-01

    Full Text Available Research in Human-Computer Interaction (HCI hasbeen enormously successful in the area of computeraidedergonomics or human-centric designs. Perfectfit for people has always been a target for productdesign. Designers traditionally used anthropometricdimensions for 3D product design which created a lotof fitting problems when dealing with thecomplexities of the human body shapes. Computeraided design (CAD, also known as Computer aideddesign and drafting (CADD is the computertechnology used for the design processing and designdocumentation. CAD has now been used extensivelyin many applications such as automotive,shipbuilding, aerospace industries, architectural andindustrial designs, prosthetics, computer animationfor special effects in movies, advertising andtechnical manuals. As a technology, digital humanmodeling (DHM has rapidly emerged as atechnology that creates, manipulates and controlhuman representations and human-machine systemsscenes on computers for interactive ergonomic designproblem solving. DHM promises to profoundlychange how products or systems are designed, howergonomics analysis is performed, how disorders andimpairments are assessed and how therapies andsurgeries are conducted. The imperative andemerging need for the DHM appears to be consistentwith the fact that the past decade has witnessedsignificant growth in both the software systemsoffering DHM capabilities as well as the corporateadapting the technology.The authors shall dwell atlength and deliberate on how research in DHM hasfinally brought about an enhanced HCI, in thecontext of computer-aided ergonomics or humancentricdesign and discuss about future trends in thiscontext.

  16. Modelling proteins' hidden conformations to predict antibiotic resistance

    Science.gov (United States)

    Hart, Kathryn M.; Ho, Chris M. W.; Dutta, Supratik; Gross, Michael L.; Bowman, Gregory R.

    2016-10-01

    TEM β-lactamase confers bacteria with resistance to many antibiotics and rapidly evolves activity against new drugs. However, functional changes are not easily explained by differences in crystal structures. We employ Markov state models to identify hidden conformations and explore their role in determining TEM's specificity. We integrate these models with existing drug-design tools to create a new technique, called Boltzmann docking, which better predicts TEM specificity by accounting for conformational heterogeneity. Using our MSMs, we identify hidden states whose populations correlate with activity against cefotaxime. To experimentally detect our predicted hidden states, we use rapid mass spectrometric footprinting and confirm our models' prediction that increased cefotaxime activity correlates with reduced Ω-loop flexibility. Finally, we design novel variants to stabilize the hidden cefotaximase states, and find their populations predict activity against cefotaxime in vitro and in vivo. Therefore, we expect this framework to have numerous applications in drug and protein design.

  17. Evaluating a digital ship design tool prototype: Designers' perceptions of novel ergonomics software.

    Science.gov (United States)

    Mallam, Steven C; Lundh, Monica; MacKinnon, Scott N

    2017-03-01

    Computer-aided solutions are essential for naval architects to manage and optimize technical complexities when developing a ship's design. Although there are an array of software solutions aimed to optimize the human element in design, practical ergonomics methodologies and technological solutions have struggled to gain widespread application in ship design processes. This paper explores how a new ergonomics technology is perceived by naval architecture students using a mixed-methods framework. Thirteen Naval Architecture and Ocean Engineering Masters students participated in the study. Overall, results found participants perceived the software and its embedded ergonomics tools to benefit their design work, increasing their empathy and ability to understand the work environment and work demands end-users face. However, participant's questioned if ergonomics could be practically and efficiently implemented under real-world project constraints. This revealed underlying social biases and a fundamental lack of understanding in engineering postgraduate students regarding applied ergonomics in naval architecture. Copyright © 2016 Elsevier Ltd. All rights reserved.

  18. Re-Purposing of Content and Digital Delivery Convergence: Implications for Interface Design.

    Science.gov (United States)

    Milekic, Slavko

    With the introduction of the digital medium, an abundance of content previously obtainable through other media became available in digital form. Digital delivery implied the necessity for some kind of content modification dictated by the specific characteristics of the digital medium. The situation is further complicated by the convergence of…

  19. Design and Evaluation of Digital Assignments on Research Experiments within Food Chemistry

    Science.gov (United States)

    Diederen, Julia; Gruppen, Harry; Hartog, Rob; Voragen, Alphons G. J.

    2006-10-01

    Laboratory classes are regarded as an important learning activity, but they also have shortcomings: laboratory classes are often an inefficient learning activity for students and often do not sufficiently support students in developing research specific cognitive skills. It is hypothesized that some of such skills can be achieved more effectively with digital assignments than with laboratory classes. Therefore, three digital assignments have been designed, developed and evaluated. The assignments have three goals: (1) providing a situation in which students can practice research specific cognitive skills and (2) offering a research method which students can also use in a real laboratory situation and (3) providing the possibility to come across a number of common pitfalls. The assignments are described in detail. Results of a first evaluation of the use of the assignments indicate that the students consider the assignments challenging and valuable. The examination results demonstrate that students are quite capable of making a research design. Although students indicate to have learned a useful research method, students do not apply the method in the laboratory classes.

  20. Design of a Digital-Based, Multicomponent Nutrition Guidance System for Prevention of Early Childhood Obesity

    Science.gov (United States)

    Black, Maureen M.; Saavedra, Jose M.

    2016-01-01

    Interventions targeting parenting focused modifiable factors to prevent obesity and promote healthy growth in the first 1000 days of life are needed. Scale-up of interventions to global populations is necessary to reverse trends in weight status among infants and toddlers, and large scale dissemination will require understanding of effective strategies. Utilizing nutrition education theories, this paper describes the design of a digital-based nutrition guidance system targeted to first-time mothers to prevent obesity during the first two years. The multicomponent system consists of scientifically substantiated content, tools, and telephone-based professional support delivered in an anticipatory and sequential manner via the internet, email, and text messages, focusing on educational modules addressing the modifiable factors associated with childhood obesity. Digital delivery formats leverage consumer media trends and provide the opportunity for scale-up, unavailable to previous interventions reliant on resource heavy clinic and home-based counseling. Designed initially for use in the United States, this system's core features are applicable to all contexts and constitute an approach fostering healthy growth, not just obesity prevention. The multicomponent features, combined with a global concern for optimal growth and positive trends in mobile internet use, represent this system's future potential to affect change in nutrition practice in developing countries. PMID:27635257

  1. Design of a Digital-Based, Multicomponent Nutrition Guidance System for Prevention of Early Childhood Obesity

    Directory of Open Access Journals (Sweden)

    Keriann H. Uesugi

    2016-01-01

    Full Text Available Interventions targeting parenting focused modifiable factors to prevent obesity and promote healthy growth in the first 1000 days of life are needed. Scale-up of interventions to global populations is necessary to reverse trends in weight status among infants and toddlers, and large scale dissemination will require understanding of effective strategies. Utilizing nutrition education theories, this paper describes the design of a digital-based nutrition guidance system targeted to first-time mothers to prevent obesity during the first two years. The multicomponent system consists of scientifically substantiated content, tools, and telephone-based professional support delivered in an anticipatory and sequential manner via the internet, email, and text messages, focusing on educational modules addressing the modifiable factors associated with childhood obesity. Digital delivery formats leverage consumer media trends and provide the opportunity for scale-up, unavailable to previous interventions reliant on resource heavy clinic and home-based counseling. Designed initially for use in the United States, this system’s core features are applicable to all contexts and constitute an approach fostering healthy growth, not just obesity prevention. The multicomponent features, combined with a global concern for optimal growth and positive trends in mobile internet use, represent this system’s future potential to affect change in nutrition practice in developing countries.

  2. Clinical Digital Libraries Project: design approach and exploratory assessment of timely use in clinical environments*

    Science.gov (United States)

    MacCall, Steven L.

    2006-01-01

    Objective: The paper describes and evaluates the use of Clinical Digital Libraries Project (CDLP) digital library collections in terms of their facilitation of timely clinical information seeking. Design: A convenience sample of CDLP Web server log activity over a twelve-month period (7/2002 to 6/2003) was analyzed for evidence of timely information seeking after users were referred to digital library clinical topic pages from Web search engines. Sample searches were limited to those originating from medical schools (26% North American and 19% non-North American) and from hospitals or clinics (51% North American and 4% non-North American). Measurement: Timeliness was determined based on a calculation of the difference between the timestamps of the first and last Web server log “hit” during each search in the sample. The calculated differences were mapped into one of three ranges: less than one minute, one to three minutes, and three to five minutes. Results: Of the 864 searches analyzed, 48% were less than 1 minute, 41% were 1 to 3 minutes, and 11% were 3 to 5 minutes. These results were further analyzed by environment (medical schools versus hospitals or clinics) and by geographic location (North America versus non-North American). Searches reflected a consistent pattern of less than 1 minute in these environments. Though the results were not consistent on a month-by-month basis over the entire time period, data for 8 of 12 months showed that searches shorter than 1 minute predominated and data for 1 month showed an equal number of less than 1 minute and 1 to 3 minute searches. Conclusions: The CDLP digital library collections provided timely access to high-quality Web clinical resources when used for information seeking in medical education and hospital or clinic environments from North American and non–North American locations and consistently provided access to the sought information within the documented two-minute standard. The limitations of the use of

  3. A new approach for design of organic electrochromic devices with inter-digitated electrode structure

    Energy Technology Data Exchange (ETDEWEB)

    Bar, Galit; Strum, Galit; Gvishi, Raz [Electro-optics Division, Soreq NRC, Yavne 81800 (Israel); Larina, Nina; Lokshin, Vladimir; Khodorkovsky, Vladimir [Interdisciplinary Center of Nanoscience CINaM (CNRS UPR 3118), 13288 Marseille Cedex 9 (France); Grinis, Larissa; Zaban, Arie [Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900 (Israel); Kiryuschev, Irina [Irus Optomechanics LTD (Israel)

    2009-12-15

    We present a new approach for design of organic electrochromic devices (ECD) with inter-digitated electrode (IDE) structure and three-electrode dynamic operation. The advantages of the IDE design include the ability to produce fast and homogenous color change over large areas. In addition, it enables fabrication of multi-color devices. Our method involves photolithographic etching of ITO followed by electrophoretic deposition (EPD) and mechanical compression of porous titania to produce finely patterned electrodes with high surface area. The titania layer is chemically modified by new stable and reversible electrochromic viologen derivatives involving phenylphosphonic acid anchoring moiety. The new device demonstrates reversible and strong color change from colorless to deep blue and yellow. (author)

  4. ASIC design of a digital fuzzy system on chip for medical diagnostic applications.

    Science.gov (United States)

    Roy Chowdhury, Shubhajit; Roy, Aniruddha; Saha, Hiranmay

    2011-04-01

    The paper presents the ASIC design of a digital fuzzy logic circuit for medical diagnostic applications. The system on chip under consideration uses fuzzifier, memory and defuzzifier for fuzzifying the patient data, storing the membership function values and defuzzifying the membership function values to get the output decision. The proposed circuit uses triangular trapezoidal membership functions for fuzzification patients' data. For minimizing the transistor count, the proposed circuit uses 3T XOR gates and 8T adders for its design. The entire work has been carried out using TSMC 0.35 µm CMOS process. Post layout TSPICE simulation of the whole circuit indicates a delay of 31.27 ns and the average power dissipation of the system on chip is 123.49 mW which indicates a less delay and less power dissipation than the comparable embedded systems reported earlier.

  5. Design of 6-Bit Flash Analog to Digital Converter Using Variable Switching Voltage CMOS Comparator

    Directory of Open Access Journals (Sweden)

    Gulrej Ahmed

    2014-04-01

    Full Text Available This paper presents the design of 6-bit flash analog to digital Converter (ADC using the new variable switching voltage (VSV comparator. In general, Flash ADCs attain the highest conversion speed at the cost of high power consumption. By using the new VSV comparator, the designed 6-bit Flash ADC exhibits significant improvement in terms of power and speed of previously reported Flash ADCs. The simulation result shows that the converter consumes peak power 2.1 mW from a 1.2 V supply and achieves the speed of 1 GHz in a 65nm standard CMOS process. The measurement of maximum differential and integral nonlinearities (DNL and INL of the Flash ADC are 0.3 LSB and 0.6 LSB respectively.

  6. Application of digital computer APU modeling techniques to control system design.

    Science.gov (United States)

    Bailey, D. A.; Burriss, W. L.

    1973-01-01

    Study of the required controls for a H2-O2 auxiliary power unit (APU) technology program for the Space Shuttle. A steady-state system digital computer program was prepared and used to optimize initial system design. Analytical models of each system component were included. The program was used to solve a nineteen-dimensional problem, and then time-dependent differential equations were added to the computer program to simulate transient APU system and control. Some system parameters were considered quasi-steady-state, and others were treated as differential variables. The dynamic control analysis proceeded from initial ideal control modeling (which considered one control function and assumed the others to be ideal), stepwise through the system (adding control functions), until all of the control functions and their interactions were considered. In this way, the adequacy of the final control design over the required wide range of APU operating conditions was established.

  7. DIRECT DIGITAL DESIGN AND SIMULATION OF MESHING IN WORM-GEAR DRIVE

    Institute of Scientific and Technical Information of China (English)

    XU Wujiao; QIN Datong; SHI Wankai

    2006-01-01

    A direct digital design method (DDDM) of worm-gear drive is proposed. It is directly based on the simulation of manufacturing process and completely different from the conventional modeling method. The loaded tooth contact analysis (LTCA) method is analyzed, in which the advanced surface to surface searching technique is included. The influence of misalignment errors and contact deformations on contact zone and transmission error (TE) is discussed. Combined modification approach on worm tooth surface is presented. By means of DDDM and LTCA, it is very convenient to verify the effect of worm-gear drive's modification approach. The analysis results show that,the modification in profile direction reduces the sensitivity of worm-gear drive to misalignment errors and the modification in longitudinal direction decreases the TE. Thus the optimization design of worm-gear drive can be achieved prior to the actual manufacturing process.

  8. Design of Microcantilever-Based Biosensor with Digital Feedback Control Circuit

    Directory of Open Access Journals (Sweden)

    Jayu P. Kalambe

    2012-01-01

    Full Text Available This paper present the design of cantilever-based biosensors with new readout, which hold promises as fast and cheap “point of care” device as well as interesting research tools. The fabrication process and related issues of the cantilever based bio-sensor are discussed. Coventorware simulation is carried out to analyze the device behavior. A fully integrated control circuit has been designed to solve manufacturing challenge which will take care of positioning of the cantilever instead of creating nanometer gap between the electrodes. The control circuit will solve the manufacturing challenge faced by the readout methods where it is essential to maintain precise gap between the electrodes. The circuit can take care of variation obtained due to fabrication process and maintain the precise gap between the electrodes by electrostatic actuation. The control circuit consist of analog and digital modules. The reliability issues of the sensor are also discussed.

  9. An example of a digital synthesis approach to DSP design: The AGS transverse damper

    Energy Technology Data Exchange (ETDEWEB)

    Brown, K.A.; Smith, G.; Wong, V.

    1997-07-01

    Using Verilog HDL and Synopsys, the digital signal processing of the AGS Transverse Damper was designed and fitted to an Altera Flex l0k FPGA. Using a control point specification style in the high level description greatly simplified the design by placing the burden of specifying the controller on the digital synthesizer. The basic design and low level simulation are presented as well as the design methodology. The purpose of the AGS Transverse Damper is to control instabilities and injection errors that may arise in high intensity proton beams being accelerated in the AGS. The system block diagram for the DSP is shown in Figure 1. The inputs to the system come from a normalization unit. This normalization unit takes two signals as input, a sum of beam position signal plates, and a difference from the plates. The output of the normalization unit is the difference divided by the sum. This Quotient is sent to the first ALU (as Qin[11..0]). Taking differences between position measurements the system acts as a notch filter. The Second ALU computes a running sum of the output of the first ALU. This then acts to remove any offsets in the Quotient (and thus this part acts as a high pass filter - removing any baseline components to the signal). The depth of the first FIFO (between adder and subtract units) basically determines the low pass behaviour. The multiplier serves the purpose of overall loop gain for the system (the complete system is a real-time feedback system). The FIFO on the output is used to provide the correct amount of delay for the system.

  10. Design and realization of a high-speed 12-bit pipelined analog-digital converter IP block

    OpenAIRE

    Toprak, Zeynep

    2001-01-01

    This thesis presents the design, verification, system integration and the physical realization of a monolithic high-speed analog-digital converter (ADC) with 12-bit accuracy. The architecture of the ADC has been realized as a pipelined structure consisting of four pipeline stages, each of which is capable of processing the incoming analog signal with 4-bit accuracy. A bit-overlapping technique has been employed for digital error correction between the pipeline stages so that the influence of ...

  11. Is participatory design associated with the effectiveness of serious digital games for healthy lifestyle promotion? A meta-analysis

    Science.gov (United States)

    Serious digital games can be effective at changing healthy lifestyles, but large differences in their effectiveness exist. The extent of user involvement in game design may contribute to game effectiveness by creating a better fit with user preferences. Participatory design (PD), which represents ac...

  12. Rethinking Instructional Technology to Improve Pedagogy for Digital Literacy: A Design Case in a Graduate Early Childhood Education Course

    Science.gov (United States)

    Langub, Lee Woodham; Lokey-Vega, Anissa

    2017-01-01

    Digital literacy is an important aspect to consider within teacher education as a way to address twenty-first century learner needs, particularly in early childhood contexts where developmental concerns should be paramount in making instructional design decisions. This article is a design case of a graduate level early childhood education…

  13. Decorative design of ceramic tiles adapted to inkjet printing employing digital image processing; Diseno decorativo de pavimentos ceramicos adaptado a inyeccion de tinta mediante tratamiento digital de imagen

    Energy Technology Data Exchange (ETDEWEB)

    Defez, B.; Santiago-Praderas, V.; Lluna, E.; Peris-Fajarnes, G.; Dunai, E.

    2013-09-01

    The ceramic tile sector is a very competitive industry. The designer's proficiency to offer new models of the decorated surface, adapted to the production means, plays a very important role in the competitiveness. In the present work, we analyze the evolution of the design process in the ceramic sector, as much as the changes experimented in parallel by the printing equipment. Afterwards, we present a new concept of ceramic design, based on digital image processing. This technique allows the generation of homogeneous and non-repetitive designs for large surfaces, especially thought for inkjet printing. With the programmed algorithms we have compiled a prototype software for the assistance of the ceramic design. This tool allows creating continuous designs for large surfaces saving developing time. (Author)

  14. Using HPGe detector for a solar hidden-photons search

    CERN Document Server

    Horvat, R; Krcmar, M; Krecak, Z; Ljubicic, A

    2012-01-01

    In this paper we report on the results of our search for photons from a U(1) gauge factor in the hidden sector of the full theory, by observing the single spectrum in a HPGe detector arising as a result of the photoelectric-like absorption of hidden photons emitted from the Sun on germanium atoms inside the detector. The main ingredient of the theory used in our analysis, a severely constrained kinetic mixing from the two U(1) gauge factors and massive hidden photons, leads to both photon into hidden states oscillations and to a minuscule coupling of hidden photons to visible matter, of which the latter our experimental setup has been designed to observe. On a theoretical side, full account was taken of the effects of refraction and damping of photons while propagating in the Sun's interior. We exclude hidden photons with kinetic couplings chi > (1.5x10^{-6}-2.6x10^{-11}) for the mass region 1.7x10^{-4} eV < m_\\gamma' < 3.4 eV. Our constraints on the mixing parameter chi at sub-eV hidden-photon masses p...

  15. Development of next generation digital flat panel catheterization system: design principles and validation methodology

    Science.gov (United States)

    Belanger, B.; Betraoui, F.; Dhawale, P.; Gopinath, P.; Tegzes, Pal; Vagvolgyi, B.

    2006-03-01

    The design principles that drove the development of a new cardiovascular x-ray digital flat panel (DFP) detector system are presented, followed by assessments of imaging and dose performance achieved relative to other state of the art FPD systems. The new system (GE Innova 2100 IQ TM) incorporates a new detector with substantially improved DQE at fluoroscopic (73%@1μR) and record (79%@114uR) doses, an x-ray tube with higher continuous fluoro power (3.2kW), a collimator with a wide range of copper spectral filtration (up to 0.9mm), and an improved automatic x-ray exposure management system. The performance of this new system was compared to that of the previous generation GE product (Innova 2000) and to state-of-the art cardiac digital x-ray flat panel systems from two other major manufacturers. Performance was assessed with the industry standard Cardiac X-ray NEMA/SCA and I phantom, and a new moving coronary artery stent (MCAS) phantom, designed to simulate cardiac clinical imaging conditions, composed of an anthropomorphic chest section with stents moving in a manner simulating normal coronary arteries. The NEMA/SCA&I phantom results showed the Innova 2100 IQ to exceed or equal the Innova 2000 in all of the performance categories, while operating at 28% lower dose on average, and to exceed the other DFP systems in most of the performance categories. The MCAS phantom tests showed the Innova 2100 IQ to be significantly better (p Innova 2000, and significantly better than the other DFP systems in most cases at comparable or lower doses, thereby verifying excellent performance against design goals.

  16. Design and characterization of a digital image acquisition system for whole-specimen breast histopathology

    Energy Technology Data Exchange (ETDEWEB)

    Clarke, Gina M [Imaging Research Program, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, M4N 3M5 (Canada); Peressotti, Chris [Imaging Research Program, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, M4N 3M5 (Canada); Mawdsley, Gordon E [Imaging Research Program, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, M4N 3M5 (Canada); Yaffe, Martin J [Imaging Research Program, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, M4N 3M5 (Canada)

    2006-10-21

    We have developed a digital histopathology imaging system capable of producing a three-dimensional (3D) representation of histopathology from an entire lumpectomy specimen. The system has the potential to improve the accuracy of surgical margin assessment in the treatment of breast cancer by providing finer sampling and 3D visualization. A scanning light microscope was modified to allow digital photomicrography of a stack of large (up to 120 x 170 mm{sup 2}) histology slides cut serially through the entire specimen. The images are registered and displayed in 2D and 3D. The design of the system, which reduces or eliminates the appearance of 'tiling' and 'seam' artefacts inherent in the scanning method, is described and its resolution, contrast/noise and coverage properties are characterized through measurements of the modulation transfer function (MTF), depth of field (DOF) and signal difference to noise ratio (SDNR). The imaging task requires a lateral resolution of 5 {mu}m, an SDNR of 5 between relevant features, 'tiling artefact' at a level below the detectability threshold of the eye, and 'seam artefact' of less than 5-10 {mu}m. The tests demonstrate that the system is largely adequate for the imaging task, although further optimizations are required to reduce the degradation of coverage incurred by seam artefact.

  17. Design and characterization of a digital image acquisition system for whole-specimen breast histopathology

    Science.gov (United States)

    Clarke, Gina M.; Peressotti, Chris; Mawdsley, Gordon E.; Yaffe, Martin J.

    2006-10-01

    We have developed a digital histopathology imaging system capable of producing a three-dimensional (3D) representation of histopathology from an entire lumpectomy specimen. The system has the potential to improve the accuracy of surgical margin assessment in the treatment of breast cancer by providing finer sampling and 3D visualization. A scanning light microscope was modified to allow digital photomicrography of a stack of large (up to 120 × 170 mm2) histology slides cut serially through the entire specimen. The images are registered and displayed in 2D and 3D. The design of the system, which reduces or eliminates the appearance of 'tiling' and 'seam' artefacts inherent in the scanning method, is described and its resolution, contrast/noise and coverage properties are characterized through measurements of the modulation transfer function (MTF), depth of field (DOF) and signal difference to noise ratio (SDNR). The imaging task requires a lateral resolution of 5 µm, an SDNR of 5 between relevant features, 'tiling artefact' at a level below the detectability threshold of the eye, and 'seam artefact' of less than 5-10 µm. The tests demonstrate that the system is largely adequate for the imaging task, although further optimizations are required to reduce the degradation of coverage incurred by seam artefact.

  18. Design and implementation of digital television over ethernet PON transmission system

    Science.gov (United States)

    Lu, Xi; Liu, Deming; Mao, Minjing; Wang, Jinjuan

    2005-11-01

    There are two primary methods of transmitting signal of digital television to the home in China. The first one is HFC mode, which is widely used. The other is IPTV mode, which is emerging. In this paper, the scheme of digital television over Ethernet PON is proposed. There are several differences from this system to IPTV and Video over LAN: the real-time transmission of equal-bandwidth based on statistical multiplexing, channel switching based on multicast and IP CA system, etc.. And these are also the key techniques used in this system. The architecture of DTV over EPON system, the function of every component, the framing process and the multiplexing of Ethernet frame are described. The implementation procedure of the system is shown. The mechanism of channel switching using multicast technique is designed and realized. We also present the method of using static VLAN and IGMP snooping mechanism to implement statistical multiplexing on Ethernet layer, and put forward the concept of IP Conditional Access System and define it. An experimental system of DTV over EPON is set up and the experimental result is significant.

  19. Design and feasibility studies of a stationary digital breast tomosynthesis system

    Energy Technology Data Exchange (ETDEWEB)

    Yang, G., E-mail: yangg@email.unc.edu [Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Qian, X. [Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Phan, T. [Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Sprenger, F. [XinRay Systems LLC, Research Triangle Park, NC 27709 (United States); Sultana, S.; Calderon-Colon, X. [Curriculum in Applied Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Kearse, B.; Spronk, D. [XinRay Systems LLC, Research Triangle Park, NC 27709 (United States); Lu, J. [Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Curriculum in Applied Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Zhou, O., E-mail: zhou@physics.unc.edu [Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Curriculum in Applied Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States); Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (United States)

    2011-08-21

    Studies have shown that digital breast tomosynthesis (DBT) can improve breast cancer diagnosis by reconstructing 3D images. However, DBT scanners based on rotation gantry prolong the imaging time and reduce spatial resolution due to motion comparing with the regular two-view mammography. To obtain three dimension reconstruction images and maintain the high image quality of conventional mammography, we proposed a prototype stationary digital breast tomosynthesis system (s-DBT). The proposed s-DBT system acquires projection images without mechanical movement. The core component of the s-DBT system is a specially designed spatially distributed multi-beam X-ray tube based on the carbon nanotube field emission X-ray technology. The multi-beam X-ray source array enables collection of all projection images from different viewing angles without mechanical motion. Preliminary results show the s-DBT system can achieve a scan time comparable with the regular two-view mammography, and improve the spatial resolution comparing with rotating gantry DBT.

  20. Design And Implementation of Low Area/Power Elliptic Curve Digital Signature Hardware Core

    Directory of Open Access Journals (Sweden)

    Anissa Sghaier

    2017-06-01

    Full Text Available The Elliptic Curve Digital Signature Algorithm(ECDSA is the analog to the Digital Signature Algorithm(DSA. Based on the elliptic curve, which uses a small key compared to the others public-key algorithms, ECDSA is the most suitable scheme for environments where processor power and storage are limited. This paper focuses on the hardware implementation of the ECDSA over elliptic curveswith the 163-bit key length recommended by the NIST (National Institute of Standards and Technology. It offers two services: signature generation and signature verification. The proposed processor integrates an ECC IP, a Secure Hash Standard 2 IP (SHA-2 Ip and Random Number Generator IP (RNG IP. Thus, all IPs will be optimized, and different types of RNG will be implemented in order to choose the most appropriate one. A co-simulation was done to verify the ECDSA processor using MATLAB Software. All modules were implemented on a Xilinx Virtex 5 ML 50 FPGA platform; they require respectively 9670 slices, 2530 slices and 18,504 slices. FPGA implementations represent generally the first step for obtaining faster ASIC implementations. Further, the proposed design was also implemented on an ASIC CMOS 45-nm technology; it requires a 0.257 mm2 area cell achieving a maximum frequency of 532 MHz and consumes 63.444 (mW. Furthermore, in this paper, we analyze the security of our proposed ECDSA processor against the no correctness check for input points and restart attacks.

  1. Digital hand atlas for web-based bone age assessment: system design and implementation

    Science.gov (United States)

    Cao, Fei; Huang, H. K.; Pietka, Ewa; Gilsanz, Vicente

    2000-04-01

    A frequently used assessment method of skeletal age is atlas matching by a radiological examination of a hand image against a small set of Greulich-Pyle patterns of normal standards. The method however can lead to significant deviation in age assessment, due to a variety of observers with different levels of training. The Greulich-Pyle atlas based on middle upper class white populations in the 1950s, is also not fully applicable for children of today, especially regarding the standard development in other racial groups. In this paper, we present our system design and initial implementation of a digital hand atlas and computer-aided diagnostic (CAD) system for Web-based bone age assessment. The digital atlas will remove the disadvantages of the currently out-of-date one and allow the bone age assessment to be computerized and done conveniently via Web. The system consists of a hand atlas database, a CAD module and a Java-based Web user interface. The atlas database is based on a large set of clinically normal hand images of diverse ethnic groups. The Java-based Web user interface allows users to interact with the hand image database form browsers. Users can use a Web browser to push a clinical hand image to the CAD server for a bone age assessment. Quantitative features on the examined image, which reflect the skeletal maturity, is then extracted and compared with patterns from the atlas database to assess the bone age.

  2. Design of DSP-based high-power digital solar array simulator

    Science.gov (United States)

    Zhang, Yang; Liu, Zhilong; Tong, Weichao; Feng, Jian; Ji, Yibo

    2013-12-01

    To satisfy rigid performance specifications, a feedback control was presented for zoom optical lens plants. With the increasing of global energy consumption, research of the photovoltaic(PV) systems get more and more attention. Research of the digital high-power solar array simulator provides technical support for high-power grid-connected PV systems research.This paper introduces a design scheme of the high-power digital solar array simulator based on TMS320F28335. A DC-DC full-bridge topology was used in the system's main circuit. The switching frequency of IGBT is 25kHz.Maximum output voltage is 900V. Maximum output current is 20A. Simulator can be pre-stored solar panel IV curves.The curve is composed of 128 discrete points .When the system was running, the main circuit voltage and current values was feedback to the DSP by the voltage and current sensors in real-time. Through incremental PI,DSP control the simulator in the closed-loop control system. Experimental data show that Simulator output voltage and current follow a preset solar panels IV curve. In connection with the formation of high-power inverter, the system becomes gridconnected PV system. The inverter can find the simulator's maximum power point and the output power can be stabilized at the maximum power point (MPP).

  3. The Design of Application-Specific Heuristics for the Usability Evaluation of the Digital Doorway

    Directory of Open Access Journals (Sweden)

    Funmi Adebesin

    2012-06-01

    Full Text Available The Digital Doorway (DD is a joint initiative between the South African Department of Science and Technology (DST and the Meraka Institute of the Council for Scientific and Industrial Research (CSIR. The DD is a non-standard computer system deployed amongst underprivileged communities in South Africa with the objective to promote computer literacy. Since its inception, there has been no usability or accessibility evaluation of the software installed on the DD, mainly due to lack of usability engineering or interaction design expertise within the development team. The goal of the research presented in this paper was to design a solution to this problem by developing a suitable instrument that could guide DD application developers in the design and development of more usable DD software and interfaces. Design research was used as a research methodology. We first investigated the applicability of the standard usability and accessibility evaluation methods for evaluating the software installed on the DD. During the first cycle of design research, we established that a heuristic-like evaluation method would be an appropriate method for evaluating the usability and direct accessibility support provided by the DD. During a second cycle of design research, embedded in the first, we also developed a set of multi-category heuristics as the ‘instrument’ that could guide the developers during design of applications as well as in the first-level (formative evaluation thereof. To verify the heuristics, we conducted a usability evaluation of the DD and triangulated the results with a direct field observation at a natural environment of DD use, together with user-administered questionnaires.

  4. Analysis of key technologies and development of integrated digital processing system for cast blasting design

    Institute of Scientific and Technical Information of China (English)

    丁小华; 李克民; 肖双双; 狐为民

    2015-01-01

    Casting blast can greatly reduce the stripping cost and improve the production capacity of opencast coal mines. Key technologies including high bench blasting, inclined hole, millisecond blasting, pre-splitting blasting and casting blast parameters determination which have influence on the effect of casting blast have been researched with the combination of the ballistic theory and experience in mines. The integrated digital processing system of casting blast was developed in order to simplify the design process of casting blast, improve working efficiency and veracity of design result and comprehensively adopt the software programming method and the theory of casting blast. This system has achieved five functions, namely, the 3D visualization graphics management, the intelligent management of geological information, the intelligent design of casting blast, the analysis and prediction of the blasting effect and the automatic output of the design results. Long-term application in opencast coal mines has shown that research results can not only reduce the specific explosive consumption and improve the blasting effect, but also have high value of popularization and application.

  5. Path programmable logic: A structured design method for digital and/or mixed analog integrated circuits

    Science.gov (United States)

    Taylor, B.

    1990-01-01

    The design of Integrated Circuits has evolved past the black art practiced by a few semiconductor companies to a world wide community of users. This was basically accomplished by the development of computer aided design tools which were made available to this community. As the tools matured into different components of the design task they were accepted into the community at large. However, the next step in this evolution is being ignored by the large tool vendors hindering the continuation of this process. With system level definition and simulation through the logic specification well understood, why is the physical generation so blatantly ignored. This portion of the development is still treated as an isolated task with information being passed from the designer to the layout function. Some form of result given back but it severely lacks full definition of what has transpired. The level of integration in I.C.'s for tomorrow, whether through new processes or applications will require higher speeds, increased transistor density, and non-digital performance which can only be achieved through attention to the physical implementation.

  6. Design and Verification of a Digital Controller for a 2-Piece Hemispherical Resonator Gyroscope

    Directory of Open Access Journals (Sweden)

    Jungshin Lee

    2016-04-01

    Full Text Available A Hemispherical Resonator Gyro (HRG is the Coriolis Vibratory Gyro (CVG that measures rotation angle or angular velocity using Coriolis force acting the vibrating mass. A HRG can be used as a rate gyro or integrating gyro without structural modification by simply changing the control scheme. In this paper, differential control algorithms are designed for a 2-piece HRG. To design a precision controller, the electromechanical modelling and signal processing must be pre-performed accurately. Therefore, the equations of motion for the HRG resonator with switched harmonic excitations are derived with the Duhamel Integral method. Electromechanical modeling of the resonator, electric module and charge amplifier is performed by considering the mode shape of a thin hemispherical shell. Further, signal processing and control algorithms are designed. The multi-flexing scheme of sensing, driving cycles and x, y-axis switching cycles is appropriate for high precision and low maneuverability systems. The differential control scheme is easily capable of rejecting the common mode errors of x, y-axis signals and changing the rate integrating mode on basis of these studies. In the rate gyro mode the controller is composed of Phase-Locked Loop (PLL, amplitude, quadrature and rate control loop. All controllers are designed on basis of a digital PI controller. The signal processing and control algorithms are verified through Matlab/Simulink simulations. Finally, a FPGA and DSP board with these algorithms is verified through experiments.

  7. Design and Verification of a Digital Controller for a 2-Piece Hemispherical Resonator Gyroscope.

    Science.gov (United States)

    Lee, Jungshin; Yun, Sung Wook; Rhim, Jaewook

    2016-04-20

    A Hemispherical Resonator Gyro (HRG) is the Coriolis Vibratory Gyro (CVG) that measures rotation angle or angular velocity using Coriolis force acting the vibrating mass. A HRG can be used as a rate gyro or integrating gyro without structural modification by simply changing the control scheme. In this paper, differential control algorithms are designed for a 2-piece HRG. To design a precision controller, the electromechanical modelling and signal processing must be pre-performed accurately. Therefore, the equations of motion for the HRG resonator with switched harmonic excitations are derived with the Duhamel Integral method. Electromechanical modeling of the resonator, electric module and charge amplifier is performed by considering the mode shape of a thin hemispherical shell. Further, signal processing and control algorithms are designed. The multi-flexing scheme of sensing, driving cycles and x, y-axis switching cycles is appropriate for high precision and low maneuverability systems. The differential control scheme is easily capable of rejecting the common mode errors of x, y-axis signals and changing the rate integrating mode on basis of these studies. In the rate gyro mode the controller is composed of Phase-Locked Loop (PLL), amplitude, quadrature and rate control loop. All controllers are designed on basis of a digital PI controller. The signal processing and control algorithms are verified through Matlab/Simulink simulations. Finally, a FPGA and DSP board with these algorithms is verified through experiments.

  8. The Use of the Digital Smile Design Concept as an Auxiliary Tool in Aesthetic Rehabilitation: A Case Report.

    Science.gov (United States)

    Zanardi, Piero Rocha; Laia Rocha Zanardi, Raquel; Chaib Stegun, Roberto; Sesma, Newton; Costa, Bru-No; Cruz Laganá, Dalva

    2016-01-01

    The digital smile design is a practical diagnosis method that can assist the clinician to visualize and measure dentogingival discrepancies. This clinical report aims to present the associated steps, from the diagnosis of the alterations diagnosis through to the final aesthetic result. A 37-years-old female patient presented as her main complaint the tooth form and colour discrepancies. Applying the digital smile design principle, the necessary measures for a harmonic smile correction could be accurately determined. The initial diagnosis led to a wax up of the master cast that was duplicated in acrylic resin directly in the mouth. This temporary restoration guided the periodontal surgery and the final pressed ceramic crown restoration. We conclude that the digital smile design concept seems to be a useful tool to achieve a satisfactory aesthetic result.

  9. Digital hand atlas and web-based bone age assessment: system design and implementation.

    Science.gov (United States)

    Cao, F; Huang, H K; Pietka, E; Gilsanz, V

    2000-01-01

    Bone age assessment is a procedure frequently performed in pediatric patients to evaluate their growth disorder. A simple method commonly used in bone age assessment is atlas matching by a radiological examination of a left-hand radiograph against a small reference set of Greulich-Pyle atlas patterns of normal standards. The method however can lead to significant deviation in age assessment, due to a variety of observers with different levels of training. The Greulich-Pyle atlas developed in the 1950s based on middle upper class white populations, is also not fully applicable for children of today, especially regarding the standard development in other racial groups. In this paper, we present our system design and initial implementation of a digital hand atlas and computer-aided diagnostic (CAD) system for Web-based bone age assessment. The CAD system is built on top of existing picture archiving and communication system (PACS), as well as recent advances in Internet technology. It consists of a hand atlas database, a CAD module and a Java-based Web user interface. The digital atlas is based on a large new set of clinically normal hand images of diverse ethnic groups. A relational image database system is used to organize hand images, their extracted quantitative features and patient data. The digital atlas removes the disadvantages of the currently out-of-date Greulich-Pyle atlas and allows the bone age assessment to be computerized. The Java-based Web user interface allows users to interact with the hand image database from browsers. Users can use a Web browser to push a clinical hand image to the CAD server for a bone age assessment. Quantitative features on the examined image, which reflect the skeletal maturity, are then extracted and compared with patterns from the atlas database to assess the bone age. The digital atlas method based on open system Internet technology provides an alternative to supplement or replace the traditional one for a quantitative

  10. Design and performance of a custom ASIC digitizer for wire chamber readout in 65 nm CMOS technology

    Science.gov (United States)

    Lee, M. J.; Brown, D. N.; Chang, J. K.; Ding, D.; Gnani, D.; Grace, C. R.; Jones, J. A.; Kolomensky, Y. G.; von der Lippe, H.; Mcvittie, P. J.; Stettler, M. W.; Walder, J.-P.

    2015-06-01

    We present the design and performance of a prototype ASIC digitizer for integrated wire chamber readout, implemented in 65 nm commercial CMOS technology. Each channel of the 4-channel prototype is composed of two 16-bit Time-to-Digital Converters (TDCs), one 8-bit Analog-to-Digital Converter (ADC), a front-end preamplifier and shaper, plus digital and analog buffers that support a variety of digitization chains. The prototype has a multiplexed digital backend that executes a state machine, distributes control and timing signals, and buffers data for serial output. Laboratory bench tests measure the absolute TDC resolution between 74 ps and 480 ps, growing with the absolute delay, and a relative time resolution of 19 ps. Resolution outliers due to cross-talk between clock signals and supply or reference voltages are seen. After calibration, the ADC displays good linearity and noise performance, with an effective number of bits of 6.9. Under normal operating conditions the circuit consumes 32 mW per channel. Potential design improvements to address the resolution drift and tails are discussed.

  11. 3D Digital Design of Cranes' Structures Based on Hybrid Software Architecture

    Institute of Scientific and Technical Information of China (English)

    WANG Chonghua; LI Hua

    2006-01-01

    3D digital design for cranes' structures based on hybrid software architecture of Client/Server and Browser/Server is introduced in this paper. Based on Pro/ENGINEER platform, 3D parametric model family is built to allow generation of feasible configurations of cranes' structures in Client/Server framework. Taking use of Visual C++, the second exploiting software kit provided by Pro/ENGINEER and ANSYS GUI/APDL modeling patterns, an integration method of 3D CAD and CAE is achieved, which includes regeneration of 3D parametric model, synchronous updating and analysis of FEA model. As in Browser/Server framework, the 3D CAD models of parts, components and the whole structure could also be displayed in the customer's browser in VRML format.

  12. Fundamental Approach in Digital Circuit Design for 1-MHz Frequency PWM Gate Drive Application

    Directory of Open Access Journals (Sweden)

    Nor Zaihar Yahaya

    2011-01-01

    Full Text Available This paper discusses the design of a digital programmable logic circuit to produce a 5 V - output square wave pulses for four high power MOSFET switches using a fixed PWM circuit. It will be applied to drive the synchronous rectifier buck converter(SRBC circuit. The PWM signals with multiple fixed time delay of 15 ns, 232 ns, 284 ns and 955 ns are generated. The steps taken to analyze each propagation time delay of each logic gate used and its combination are carefully studied. A multiplexer is added at the output of the logic circuit to select and produce the desired output pulses of 20% duty ratio. The logic outputs are compared with the analog pulses and results match each other within 1% in difference.

  13. Design, data, and theory regarding a digital hand inclinometer: a portable device for studying slant perception.

    Science.gov (United States)

    Li, Zhi; Durgin, Frank H

    2011-06-01

    Palm boards are often used as a nonverbal measure in human slant perception studies. It was recently found that palm boards are biased and relatively insensitive measures, and that an unrestricted hand gesture provides a more sensitive response (Durgin, Hajnal, Li, Tonge, & Stigliani, Acta Psychologica, 134, 182-197, 2010a). In this article, we describe an original design for a portable lightweight digital device for measuring hand orientation. This device is microcontroller-based and uses a micro inclinometer chip as its inclination sensor. The parts are fairly inexpensive. This device, used to measure hand orientation, provides a sensitive nonverbal method for studying slant perception, which can be used in both indoor and outdoor environments. We present data comparing the use of a free hand to palm-board and verbal measures for surfaces within reach and explain how to interpret free-hand measures for outdoor hills.

  14. The design, build and test of a digital analyzer for mixed radiation fields

    Energy Technology Data Exchange (ETDEWEB)

    Joyce, M. J.; Aspinall, M. D.; Georgopoulos, K. [Department of Engineering, Lancaster University, Lancaster, Lancashire LA1 4YR (United Kingdom); Cave, F. D.; Jarrah, Z. [Hybrid Instruments Ltd., Priory Close, St. Mary' s Gate, Lancaster, Lancashire LA1 4WA (United Kingdom)

    2009-07-01

    The design, build and test of a digital analyzer for mixed radiation fields is described. This instrument has been developed to provide portable, real-time discrimination of hard mixed fields comprising both neutrons and {gamma} rays with energies typically above 0.5 MeV. The instrument in its standard form comprises a sensor head and a system unit, and affords the flexibility to provide processed data in the form of the traditional scatter-plot representation separating neutron and {gamma}-ray components, or the full, sampled pulse data itself. The instrument has been tested with an americium-beryllium source in three different shielding arrangements to replicate the case in which there are only neutrons, only {gamma} rays and where both neutrons and {gamma}-rays are present. The instrument is observed to return consistent results. (authors)

  15. Design, Construction and Testing of the Digital Hadron Calorimeter (DHCAL) Electronics

    CERN Document Server

    Adams, C; Bilki, B; Butler, J; Corriveau, F; Cundiff, T; Drake, G; Francis, K; Guarino, V; Haberichter, B; Hazen, E; Hoff, J; Holm, S; Kreps, A; DeLurgio, P; Monte, L Dal; Mucia, N; Norbeck, E; Northacker, D; Onel, Y; Pollack, B; Repond, J; Schlereth, J; Smith, J R; Trojand, D; Underwood, D; Velasco, M; Walendziak, J; Wood, K; Wu, S; Xia, L; Zhang, Q; Zhao, A

    2016-01-01

    A novel hadron calorimeter is being developed for future lepton colliding beam detectors. The calorimeter is optimized for the application of Particle Flow Algorithms (PFAs) to the measurement of hadronic jets and features a very finely segmented readout with 1 x 1 cm2 cells. The active media of the calorimeter are Resistive Plate Chambers (RPCs) with a digital, i.e. one-bit, readout. To first order the energy of incident particles in this calorimeter is reconstructed as being proportional to the number of pads with a signal over a given threshold. A large-scale prototype calorimeter with approximately 500,000 readout channels has been built and underwent extensive testing in the Fermilab and CERN test beams. This paper reports on the design, construction, and commissioning of the electronic readout system of this prototype calorimeter. The system is based on the DCAL front-end chip and a VME-based back-end.

  16. Design criteria for a multiple input land use system. [digital image processing techniques

    Science.gov (United States)

    Billingsley, F. C.; Bryant, N. A.

    1975-01-01

    A design is presented that proposes the use of digital image processing techniques to interface existing geocoded data sets and information management systems with thematic maps and remote sensed imagery. The basic premise is that geocoded data sets can be referenced to a raster scan that is equivalent to a grid cell data set, and that images taken of thematic maps or from remote sensing platforms can be converted to a raster scan. A major advantage of the raster format is that x, y coordinates are implicitly recognized by their position in the scan, and z values can be treated as Boolean layers in a three-dimensional data space. Such a system permits the rapid incorporation of data sets, rapid comparison of data sets, and adaptation to variable scales by resampling the raster scans.

  17. Development of basic technology for instrumentation and control - Development of digital automatic supervisory limitation system and its design= validation

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Jung In; Chung, Sung Wook; Koh, Won Seok [Kyungwon University, Sungman (Korea, Republic of); Suh, Duk Young; Cheon, Sei Young [Kyunghee University, Seoul (Korea, Republic of); Lee, Sang Kyung; Kim, Sung Hun [Seoul National University, Seoul (Korea, Republic of)

    1995-07-01

    A major objective of the project is to develop a digital automatic supervisory limitation system and validate its design for the next generation= nuclear power plant. The limitation system assures that the plant does not exceed the operating limits by regulation the plant operations through on-line monitoring the operating margins of the critical parameters. A new conceptual model of power maneuverability has been proposed for the design of the limitation system and for its validation. Also, the limitation system monitors overall operation processes throughout a nuclear power plant by implementing hierarchical communication networks. Based on the conceptual design in software of the 1 st year results, the detailed design of the limitation system has been performed during the 2 nd year with constructing a prototype digital system. The system consists of the software module for plant simulation and the hardware module for implementation of limitation system and the associated interfaces in hardware. The limitation algorithm were implemented into the microprocessor and the interfaces were realized through the I/O modules. Also, these modules are incorporated into the communication networks. The products of the project could be directly applicable to the following nuclear unit adopting the limitation system, providing the bumpless transition to the commercial design phase. And the prototype evaluation scheme will be very useful for the succeeding studies related to the digital nuclear I and C fields, such as fault-tolerance design methods, software verification and validation and response time execution of digital systems. 69 refs., 3 tabs., 44 figs. (author)

  18. Development of basic technology for instrumentation and control - Development of digital automatic supervisory limitation system and its design= validation

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Jung In; Chung, Sung Wook; Koh, Won Seok [Kyungwon University, Sungman (Korea, Republic of); Suh, Duk Young; Cheon, Sei Young [Kyunghee University, Seoul (Korea, Republic of); Lee, Sang Kyung; Kim, Sung Hun [Seoul National University, Seoul (Korea, Republic of)

    1995-07-01

    A major objective of the project is to develop a digital automatic supervisory limitation system and validate its design for the next generation= nuclear power plant. The limitation system assures that the plant does not exceed the operating limits by regulation the plant operations through on-line monitoring the operating margins of the critical parameters. A new conceptual model of power maneuverability has been proposed for the design of the limitation system and for its validation. Also, the limitation system monitors overall operation processes throughout a nuclear power plant by implementing hierarchical communication networks. Based on the conceptual design in software of the 1 st year results, the detailed design of the limitation system has been performed during the 2 nd year with constructing a prototype digital system. The system consists of the software module for plant simulation and the hardware module for implementation of limitation system and the associated interfaces in hardware. The limitation algorithm were implemented into the microprocessor and the interfaces were realized through the I/O modules. Also, these modules are incorporated into the communication networks. The products of the project could be directly applicable to the following nuclear unit adopting the limitation system, providing the bumpless transition to the commercial design phase. And the prototype evaluation scheme will be very useful for the succeeding studies related to the digital nuclear I and C fields, such as fault-tolerance design methods, software verification and validation and response time execution of digital systems. 69 refs., 3 tabs., 44 figs. (author)

  19. Design and Research on Sigma-Delta Digital-to-Analog Converters for Audio Power Amplifiers

    OpenAIRE

    Puidokas, Vytenis

    2011-01-01

    The dissertation investigates the issues of analyzing a digital Sigma-Delta digital-to-analog converter (DAC) for audio power amplifiers. The main objects of research include a digital Sigma-Delta audio power DAC, improvement of its structure and an experimental research. The primary purpose of the dissertation is to suggest methods for improvement the structure of digital Sigma-Delta audio power DAC interpolator and the converter analysis. Disertacijoje nagrinėjami Sigma-Delta skaitmenini...

  20. Design and implementation of interface units for high speed fiber optics local area networks and broadband integrated services digital networks

    Science.gov (United States)

    Tobagi, Fouad A.; Dalgic, Ismail; Pang, Joseph

    1990-01-01

    The design and implementation of interface units for high speed Fiber Optic Local Area Networks and Broadband Integrated Services Digital Networks are discussed. During the last years, a number of network adapters that are designed to support high speed communications have emerged. This approach to the design of a high speed network interface unit was to implement package processing functions in hardware, using VLSI technology. The VLSI hardware implementation of a buffer management unit, which is required in such architectures, is described.