On-line arithmetic for detection in digital communication receivers

2002 ◽  
Author(s):  
S. Rajagopal ◽  
J.R. Cavallaro
Keyword(s):  
Digital Communication ◽  
On Line

scholarly journals Semiótica de la Marca como herramienta para innovar en pymes de Colombia / Branding Semiotics, tips to Innovate in SMEs in Colombia

2016 ◽  
Vol 5 (1) ◽  
pp. 119-129
Author(s):  
Mireya Barón Pulido ◽  
Gabriel Lotero Echeverri
Keyword(s):  
Qualitative Research ◽  
Mass Media ◽  
Organizational Communication ◽  
Digital Communication ◽  
Business Owners ◽  
Quantitative Phase ◽  
Communicative Strategies ◽  
Research Findings ◽  
On Line ◽  
The Relationship

ABSTRACTThe mass media and multitasking (Piscitelli, 2009) society requires from the manager to consider the relationship and impact of what his brand communicates. The design of online communicative strategies and their link to consultancy models (Pfefferman, 2011) – where the manager himself becomes the entrepreneur of his own organization — becomes the strength of the branding communication of the organization (Capriotti, P., 2009). The paper exposes the research findings obtained from the study done with small and medium enterprisess (SMEs) in Medellin and Bogotá (Colombia). This qualitative research examines the organizations capabilities toward the appropriation of opportunities on behalf of digital communication. Finally it makes a consultancy proposal addressed to pymes entrepreneurs from the perspective which considers the “Enterprise as a sign and as a semiosis”. It is claimed that if something is not communicated it will not generate any reminder at the level of the client. The results research -which compiles Medellin and Bogotá data- are published upon two products: A book to the organizational communication field, and a multimedia guide to business owners. It is a qualitative studio but with a quantitative phase, applying survey forms.RESUMENLa sociedad mediática y “multitasking” (Piscitelli, 2009) demanda al empresario tener en cuenta la relación e impacto de lo que comunica su marca en el entorno. El diseño de estrategias comunicativas on line, y su vinculación a modelos de consultoría (Pfefferman, N., 2011) se convierte en fortalezas en la comunicación de la marca de la organización (Capriotti, P, 2009). En el texto se exponen los resultados de una investigación con pequeñas y medianas empresas (pymes) de Medellín y Bogotá (Colombia), realizada como un estudio cualitativo, que se propone indagar por las capacidades de las organizaciones para la apropiación de las oportunidades que representa la comunicación digital. Finalmente, se plantea una propuesta de consultoría a los empresarios de pymes, desde el enfoque que reconoce a la “Empresa como signo y semiosis”, es decir, lo que no se comunica no genera recordación en el cliente.

scholarly journals Muddy Rules for Cyberspace

2016 ◽  
Author(s):  
Dan Burk
Keyword(s):  
Intellectual Property ◽  
Transaction Costs ◽  
Strategic Behavior ◽  
Digital Communication ◽  
The Internet ◽  
Efficient Allocation ◽  
Self Help ◽  
Recent Scholarship ◽  
On Line ◽  
Number Of Parties

Digital communication media such as the Internet pose difficult challenges for traditional forms of intellectual property protection. Much recent scholarship and considerable governmental attention has been focused on adapting and expanding copyright to encompass digital works of authorship. These efforts have been justified on the grounds that clear property rights are necessary to allow efficient allocation of intellectual property between private parties. However, these rationales ignore the literature regarding the efficiency of unclear or "muddy" property entitlements. Where transaction costs of private bargaining are high, "muddy" rules will tend to force parties into informal bargaining transactions. Transaction costs on the Internet may tend to be high because of the number of parties involved, the difficulty of locating the parties, increased opportunity for strategic behavior, and the transborder nature of the medium. Thus, informal transactions or "self-help" may be the most efficient means for provision of digital works. In such a case, "muddy" or unclear rules should perhaps be favored for on-line entitlements.

scholarly journals Digital Communication: Convenience or necessity of modern tourism?

2021 ◽  
Vol 18 (3) ◽  
pp. 35-52
Author(s):  
Tatjana Cvetkovski ◽  
Violeta Cvetkovska-Tomanović
Keyword(s):  
Digital Technology ◽  
Digital Communication ◽  
Economic Sectors ◽  
Steady Growth ◽  
Generation Z ◽  
Corona Virus ◽  
Tourism Sector ◽  
Modern Business ◽  
On Line ◽  
New Generation

The paper deals with the role of digital communication in the tourism sector. The aim is to determine whether the use of digital communications is only an available opportunity or a necessity imposed by a new generation of travelers (the so-called Millennials and Generation Z) and new circumstances coused by the coronavirus pandemic. Communication and today digital communication are an important aspect of our lives. People use the Internet to do business, socialize, inform, share their impressions, to shop. The way people travel is changing as well. They look for information about touristic destination and products online, assess impressions of those who have already visited destinations or happenings and stayed in specific accommodation. Then they book transportation and accommodation on-line via websites and platforms. The tourism sector is information intensive and this is why digital communication is important for this sector. Some quickly got used to the new reality and began to use all the opportunities provided by the new digital technology, while some found it harder to accept. Until the beginning of 2020. tourism become one of the fastest-growing economic sectors in the world, and steady growth would certainly continue but corona virus pandemic happened and everything has stopped. The corona virus pandemic has set new requirements for the tourism sector and is already dictating new ways of doing business. Through various statistical and other data used in the paper, we will see that at the beginning the usage of digital technology and digital communication in the tourism sector was something that existed as a possibility but today this is a necessity of modern business.

Web-Based Remote Learning of Communication Systems: A Successful Experience

2003 ◽  
Vol 40 (3) ◽  
pp. 169-174 ◽  
Author(s):  
Antonio J. López Martín
Keyword(s):  
Communication Systems ◽  
Engineering Students ◽  
Communication Theory ◽  
Digital Communication ◽  
Web Based ◽  
Additional Information ◽  
Interactive Tools ◽  
On Line ◽  
Digital Communication Systems

A web-based on-line framework has been created to augment an undergraduate course in communication theory aimed at Spanish telecommunication engineering students. Its aim is to enrich the students' understanding on basic topics such as analogue and digital communication systems, information theory, random signals and noise, as well as to provide remote support, additional information and interactive tools. As an ultimate goal, it tries to contribute to a redefinition of the role of the student as the principal actor of his or her own learning.

The on-line use of histogram data for high-speed correction and alignment of electron microscope images

1984 ◽  
Vol 42 ◽  
pp. 556-557
Author(s):  
William Krakow
Keyword(s):  
Power Spectrum ◽  
High Speed ◽  
Direct Memory Access ◽  
Digital Television ◽  
Contrast Transfer Function ◽  
The Past ◽  
High Resolution Tem ◽  
On Line ◽  
Correction Of Astigmatism ◽  
The Fourier Transform

In the past few years on-line digital television frame store devices coupled to computers have been employed to attempt to measure the microscope parameters of defocus and astigmatism. The ultimate goal of such tasks is to fully adjust the operating parameters of the microscope and obtain an optimum image for viewing in terms of its information content. The initial approach to this problem, for high resolution TEM imaging, was to obtain the power spectrum from the Fourier transform of an image, find the contrast transfer function oscillation maxima, and subsequently correct the image. This technique requires a fast computer, a direct memory access device and even an array processor to accomplish these tasks on limited size arrays in a few seconds per image. It is not clear that the power spectrum could be used for more than defocus correction since the correction of astigmatism is a formidable problem of pattern recognition.

Image registration with a computer driven S.T.E.M.

1978 ◽  
Vol 36 (1) ◽  
pp. 98-99
Author(s):  
A.M.H. Schepman ◽  
J.A.P. van der Voort ◽  
J.E. Mellema
Keyword(s):  
Spot Size ◽  
Scanning Transmission Electron Microscope ◽  
Small Computer ◽  
Structural Studies ◽  
Area Of Interest ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Specimen Area ◽  
On Line ◽  
Minimum Distances

A Scanning Transmission Electron Microscope (STEM) was coupled to a small computer. The system (see Fig. 1) has been built using a Philips EM400, equipped with a scanning attachment and a DEC PDP11/34 computer with 34K memory. The gun (Fig. 2) consists of a continuously renewed tip of radius 0.2 to 0.4 μm of a tungsten wire heated just below its melting point by a focussed laser beam (1). On-line operation procedures were developped aiming at the reduction of the amount of radiation of the specimen area of interest, while selecting the various imaging parameters and upon registration of the information content. Whereas the theoretical limiting spot size is 0.75 nm (2), routine resolution checks showed minimum distances in the order 1.2 to 1.5 nm between corresponding intensity maxima in successive scans. This value is sufficient for structural studies of regular biological material to test the performance of STEM over high resolution CTEM.

Design and calibration of an IVEM for general 3-dimensional imaging of non-diffracting materials

1992 ◽  
Vol 50 (2) ◽  
pp. 1040-1041
Author(s):  
Neil Rowlands ◽  
Jeff Price ◽  
Michael Kersker ◽  
Seichi Suzuki ◽  
Steve Young ◽  
...  
Keyword(s):  
3D Imaging ◽  
Tomographic Reconstruction ◽  
Three Dimensional ◽  
3 Dimensional ◽  
3D Microstructure ◽  
Image Translation ◽  
Digital Correlation ◽  
On Line ◽  
Mechanical Stage ◽  
Projection Angle

Three-dimensional (3D) microstructure visualization on the electron microscope requires that the sample be tilted to different positions to collect a series of projections. This tilting should be performed rapidly for on-line stereo viewing and precisely for off-line tomographic reconstruction. Usually a projection series is collected using mechanical stage tilt alone. The stereo pairs must be viewed off-line and the 60 to 120 tomographic projections must be aligned with fiduciary markers or digital correlation methods. The delay in viewing stereo pairs and the alignment problems in tomographic reconstruction could be eliminated or improved by tilting the beam if such tilt could be accomplished without image translation.A microscope capable of beam tilt with simultaneous image shift to eliminate tilt-induced translation has been investigated for 3D imaging of thick (1 μm) biologic specimens. By tilting the beam above and through the specimen and bringing it back below the specimen, a brightfield image with a projection angle corresponding to the beam tilt angle can be recorded (Fig. 1a).

Software pattern recognition applied to nanodiffraction patterns from a STEM instrument

1986 ◽  
Vol 44 ◽  
pp. 694-695
Author(s):  
G.Y. Fan ◽  
J.M. Cowley
Keyword(s):  
Image Processing ◽  
Pattern Recognition ◽  
Computer Software ◽  
Processing System ◽  
Light Level ◽  
Host Computer ◽  
Low Light ◽  
Image Processing System ◽  
Recent Developments ◽  
On Line

In recent developments, the ASU HB5 has been modified so that the timing, positioning, and scanning of the finely focused electron probe can be entirely controlled by a host computer. This made the asynchronized handshake possible between the HB5 STEM and the image processing system which consists of host computer (PDP 11/34), DeAnza image processor (IP 5000) which is interfaced with a low-light level TV camera, array processor (AP 400) and various peripheral devices. This greatly facilitates the pattern recognition technique initiated by Monosmith and Cowley. Software called NANHB5 is under development which, instead of employing a set of photo-diodes to detect strong spots on a TV screen, uses various software techniques including on-line fast Fourier transform (FFT) to recognize patterns of greater complexity, taking advantage of the sophistication of our image processing system and the flexibility of computer software.

Thickness Measurement in the AEM by Macintosh-Based Analysis of Two-Beam Convergent Beam Patterns

1990 ◽  
Vol 48 (2) ◽  
pp. 504-505
Author(s):  
John F. Mansfield ◽  
Douglas C. Crawford
Keyword(s):  
Electron Microscope ◽  
Video Camera ◽  
Thickness Measurement ◽  
Specimen Thickness ◽  
Crystalline Materials ◽  
Beam Dynamic ◽  
Line Measurement ◽  
On Line ◽  
Image Position ◽  
Convergent Beam

A method has been developed that allows on-line measurement of the thickness of crystalline materials in the analytical electron microscope. Two-beam convergent beam electron diffraction (CBED) patterns are digitized from a JEOL 2000FX electron microscope into an Apple Macintosh II microcomputer via a Gatan #673 CCD Video Camera and an Imaging Systems Technology Video 1000 frame-capture board. It is necessary to know the lattice parameters of the sample since measurements are made of the spacing of the diffraction discs in order to calibrate the pattern. The sample thickness is calculated from measurements of the spacings of the fringes that are seen in the diffraction discs. This technique was pioneered by Kelly et al, who used the two-beam dynamic theory of MacGillavry relate the deviation parameter (Si) of the ith fringe from the exact Bragg condition to the specimen thickness (t) with the equation:Where ξg, is the extinction distance for that reflection and ni is an integer.

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