This paper proposes a new digital beamformer for uniform concentric circular array (UCCA) having nearly frequency invariant (FI) characteristics. The basic principle is to transform the received signals to the phase mode and remove the frequency dependency of the individual phase mode through the use of a digital beamforming network. The far field pattern of the array is determined by a set of ...

The USNO 8–inch astrograph has been equipped with a Kodak 1536x1024 pixel CCD since June 1995, operating in a 570–650 nm bandpass. With 3–minute exposures well exposed images are obtained in the magnitude range R ≈ 8.5 − 13.5. An astrometric precision of 10 to 15 mas for those stars is estimated from frame–to–frame comparisons. External comparisons reveal an accuracy of about 15 mas for those s...

The Zandra Rhodes Digital Study Collection project was a unique collaborative venture between staff and students at the University for the Creative Arts (UCA) and their Chancellor, the British fashion and textile designer Zandra Rhodes. Working within the designer’s private studio space, this initiative has developed the first digital record of her personal collection of garments and drawings, ...

Modeling the behavior of a system under development has proven to be a very effective way to ensure that it will be constructed correctly. However, building up this model is a difficult task that requires a significant time investment in and a high level of expertise. Consequently, incremental approaches that construct a system model from partial behavioral descriptions have been widely adopted...

This study presents efficient algorithms for performing multiply-by-3 (3N) and divide-by-3 (N/3) operations with the additions and subtractions, respectively. No multiplications and divisions are needed. Full adder (FA) and full subtractor (FS) can be implemented to realize the N3 and N/3 operations, respectively. For fast hardware implementation, this paper introduces two basic cells UCA and U...

This is the first of two chapters of a work in which we consider the unrestricted, minimal, and bounded representation problems for unit interval (UIG) and unit circular-arc (UCA) graphs. In the unrestricted version, a proper circular-arc (PCA) modelM is given and the goal is to obtain an equivalent UCA model U . In the bounded version,M is given together with some lower and upper bounds that t...

The study was conducted to explore the perception of geography teachers on use ICT in teaching before, during and beyond pandemic. carried out for secondary western region Bhutan. researcher employed pragmatism paradigm sequential explanatory design this study. quantitative data were collected through survey questionnaire from 84 focus group discussions with 12 teachers. analysed using Descript...

Purpose. The study is aimed to ascertain the possible ways of translation female identity in written form through gender mask.
 Materials and methods. survey based on: definitional analysis tendencies, contextual observation speech material fictional work, as well linguistic facts interpretation collation, statistical data manipulation.
 Results. hypothesis potential epitome author’s ...

With the continuous progress of Internet information technology and further strengthening popularity in China, evolving circumstance its cross-border e-commerce platforms is presently fully operating. In particular, B2C for import are developing rapidly. This article first provides a brief introduction to development status China's e-commerce. It then reviews synthesizes relevant literature abo...

In 1994, the Birmingham based lesbian health activism group LesBeWell began to produce a newsletter titled Dykenosis. Variously describing itself as ‘for women who have sex with women’, ‘health information for dykes’ and ‘the national bi-monthly about health’, offers window into how one activist imagined ill of had in 1990s. By analysing Dykenosis, this article illuminates identified attempted ...