401 research outputs found
Floating Point Square Root under HUB Format
Unit-Biased (HUB) is an emerging format based on
shifting the representation line of the binary numbers by half
unit in the last place. The HUB format is specially relevant
for computers where rounding to nearest is required because
it is performed simply by truncation. From a hardware point
of view, the circuits implementing this representation save both
area and time since rounding does not involve any carry propagation.
Designs to perform the four basic operations have been
proposed under HUB format recently. Nevertheless, the square
root operation has not been confronted yet. In this paper we
present an architecture to carry out the square root operation
under HUB format for floating point numbers. The results of
this work keep supporting the fact that the HUB representation
involves simpler hardware than its conventional counterpart for
computers requiring round-to-nearest mode.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec
Reproducible SUmmation under HUB Format
Version diferente del paper presentado en el congresoFloating point reproducibility is a property
claimed by programmers and end users. Half-Unit-Biased
(HUB) is a new representation format in which the round
to nearest is carried out by truncation, preventing any carry
propagation and saving time and area. In this paper we study
the reproducible summation of HUB numbers by using a errorfree
vector transformation technique, providing both a specific
architecture and the usage of combined HUB/Standard floating
point adders to achieve a reproducible resultUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech
Unbiased Rounding for HUB Floating-point Addition
Copyright (c) 2018 IEEE doi:10.1109/TC.2018.2807429Half-Unit-Biased (HUB) is an emerging format
based on shifting the represented numbers by half Unit in the
Last Place. This format simplifies two’s complement and roundto-
nearest operations by preventing any carry propagation. This
saves power consumption, time and area. Taking into account
that the IEEE floating-point standard uses an unbiased rounding
as the default mode, this feature is also desirable for HUB
approaches. In this paper, we study the unbiased rounding for
HUB floating-point addition in both as standalone operation and
within FMA. We show two different alternatives to eliminate the
bias when rounding the sum results, either partially or totally.
We also present an error analysis and the implementation results
of the proposed architectures to help the designers to decide what
their best option are.TIN2013-42253-P, TIN2016-80920-R, JA2012P12-TIC-169
Development of compressor end seals stator interstage seals, and stator pivot seals in air breathing propulsion systems Semiannual report no. 1, 29 Jun. - 31 Dec. 1965
Seal concepts evaluation for compressor end seals, stator interchange seals, and stator pivot seals in air breathing propulsion syste
COSSAP simulation model of DS-CDMA indoor microwave ATM LAN
This thesis presents an original work in the area of designing and implementing a simulation testbed for modelling a high speed spread spectrum Asynchronous Transfer Mode (ATM) Local Area Network (LAN). The spread spectrum technique used in this LAN model is Direct Sequence Code Division Multiple Access (DS-CDMA). The simulation model includes at least a physical layer of such a LAN, embedded into the COSSAP1 simulation environment, and has been fully tested. All the newly developed building blocks are comprised of standard blocks from the COSSAP libraries or compatible user-built primitive blocks (only where it is absolutely necessary), and are flexible enough to allow the modification of simulation or model parameters; such as the number of signal channels, modulation method used, different spreading code sequences and so on. All these changes can be made with minimal effort. Another significant contribution made in this thesis is the extended research into evaluating the Bit Error Rate (BER) performance of different spread spectrum COMA coding schemes for an indoor microwave A1M LAN [8]. Different spread spectrum CDMA coding schemes are compared for their transmission error rate in Additive White Gaussian Noise (AWGN) channel with varying transmitted signal power and at different channel Signal to Noise Ratio (SNR) levels. Since a wireless microwave channel is very prone to transmission errors, a major contribution of the simulation testbed developed in this thesis is its use in the finding of an optimal physical layer transmission scheme with the best Bit Error Rate (BER) performance in an indoor environment
Transformative influence of Afro-Brazilian syncopation on European compound melodies in Brazilian Choro music melorhythmical re-organization of interleaved melodic structures in progressive Afro-Brazilian music from the late-19th century
During the second half of the 19th century, Rio de Janeiro’s public life became the setting for spontaneous gatherings by a varied assortment of amateur musicians. After attracting professional musicians from Rio’s popular entertainment circuit, these meetings evolved into creative musical hubs during which songs of the day were instrumentally re-styled. Commonly known as ‘Choro’ or ‘Chorinho’ (Port. ‘cry’), these music practices were infused with melodic elements from classical chamber music as well as stylistic influence from popular dance music. One significant development was the introduction of compound melodies, single-note structures that elicit the impression of being multi-melodic. Influenced by Afro-Brazilian accompanists, compound melodies became infused with syncopated phrasing elements and evolved into one of Choro’s most emblematic traits. This thesis focuses on factors and processes that created Choro’s syncopated compound melodies, identifying and explaining their organizational transformation during Choro’s stylistic hybridization processes
A manifesto for the creative economy
The UK\u27s creative economy is one of its great national strengths, historically deeply rooted and accounting for around one-tenth of the whole economy. It provides jobs for 2.5 million people – more than in financial services, advanced manufacturing or construction – and in recent years, this creative workforce has grown four times faster than the workforce as a whole. But behind this success lies much disruption and business uncertainty, associated with digital technologies. Previously profitable business models have been swept away, young companies from outside the UK have dominated new internet markets, and some UK creative businesses have struggled to compete. UK policymakers too have failed to keep pace with developments in North America and parts of Asia. But it is not too late to refresh tired policies. This manifesto sets out our 10-point plan to bolster one of the UK\u27s fastest growing sectors
NASTRAN: Users' experiences
The proceedings of a conference on NASA Structural Analysis (NASTRAN) to analyze the experiences of users of the program are presented. The subjects discussed include the following: (1) statics and buckling, (2) vibrations and dynamics, (3) substructing, (4) new capability, (5) user's experience, and (6) system experience. Specific applications of NASTRAN to spacecraft, aircraft, nuclear power plants, and materials tests are reported
Supporting research and advanced development - Space programs summary, volume 3
Research project reports on advanced systems analysis and engineering, telecommunication, solid propellants, guidance and control, and data system
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