610 research outputs found
A Modular Testbed for Hardware Reconfigurable Radio at the 2.4 GHz ISM Band
No full textA modular testbed for use in developing software defined radio is documented in this paper. The testbed is focused on the 2.4 GHz ISM band but may be used at other frequencies. An RF transceiver with variable transmit/receive frequencies and bandwidths is provided.
It provides the capability to support many modulation schemes and standards such as GSM, UMTS< IEEE 802.11b and parts of the IEEE802.16 standards. It performs the RF functions of the radio, with the other PHY and MAC layer functions such as equalisation and error-coding being performed by a host computer. It communicates with the host computer system through a USB2 interface allowing data rates of up-to 60Mbytes a second. An API is used for communications with the host computer system allowing for modulation/demodulation and coding/decoding in software on the host system and reconfiguration of the radio syste
Performance requirements for analog-to-digital converters in wideband reconfigurable radios
No full textWith the current trend towards software defined radio, several dandidate architectures for the analog receiver front-end have been presented. A common proposal for software defined reconfigurable radio is to develop a wideband ADC and utilise this for capturing a large segment of the spectrum. This would enable the subsequent signal processing operations of channel selection and data extraction to be carried out by a digital processor. This would allow the radio to be reconfigured by simply changing the software.
In analysis of these systems, powerful neighbouring signals, or blockers, are considered but it has been conveniently assumed that suitable dynamic range will be available at the ADC. THis is an acceptable assumption in narrowband systems where automatic gain control and analogue channel select filters can be used, but is not appropriate for a wideband system. In this paper we present an analysis based on bit-error-rates (BER) which shows the effect of blockers in a wideband architecture on the performance of the communication link and on the dynamic range requirements of the ADC.
We consider, as a representative example of a real world situation, the use of a wideband receiver on a Rayleigh fading channel. In any analysis of wideband receivers, the behaviour of the channel must also be included as the performance of the communication link is a combination of noise sources from both the channel and the electronics. The effect of high power interferers and blockers on the quantisation noise from the ADC will be mathematically modelled and the BER rates for the communication system will be presented. Given these results, it is possible to determine the minimum required resolution and dynamic range for an ADC in a wideband system given the spectral environment at the frequencies of interest
Modelling and Design of High-Order Phase Locked Loops
No full textIn this paper a new stable high order Digital Phase Lock Loop (DPLL) design technique is proposed. This technique uses linear theory to design the DPLL. The stability of the DPLL is guaranteed by placing a restriction on the system gain. This stability boundary is found by transforming the system transfer function to the Z-domain and plotting the root locus of the LPLL for values of gain where all the system poles lie inside the unit circle. The max value of gain where all the poles lie inside the unit circle is the stability boundary. It is shown that the stability boundary of the LPLL is comparable to the stability boundary of the
DPLL. Finally where the above Bessel filter system produces slow lock, gear shifting of the DPLL components is considered. This allows the DPLL to start off with a wide loop bandwidth and switch to the narrow bandwidth once the system has locked
Grandchildren of the revolution : sexuality, nation and Frank Ronan
No full textMestrado em Estudos InglesesEsta tese propõe-se a investigar expressões do discurso gay irlandês
contemporâneo na obra do autor irlandês Frank Ronan. O tratamento literário
de temas como a influência da Igreja Católica, a importância da célula familiar
irlandesa, ou a manifestação de posições políticas relacionadas com
nacionalismo e colonialismo nas suas obras será analisado, com vista a
examinar como estes e outros factores moldam a maneira como o discurso
homossexual é construído na república da Irlanda e no trabalho de Frank
Ronan em particular. Também será dada atenção a estereótipos nacionais e o
seu efeito na escrita de Frank Ronan.
ABSTRACT: This dissertation proposes an investigation of expressions of the contemporary
Irish gay discourse in the fiction of Irish author Frank Ronan. The literary
treatment of themes such as the influence of the Catholic Church, the
importance of the Irish family cell, or the manifestation of political views,
concerning nationalism and colonialism in the novels will be analysed, in order
to study how these and other factors shape the way that homosexual discourse
is constructed in the Republic of Ireland and in the work of Frank Ronan in
particular. Attention will also be given to Irish national stereotypes, and their
effect on Ronan’s writing
Children and Disasters: A tribute to Professor Kevin Ronan
No full text(c) The Author/sIn 1997, Professor Kevin Ronan published a paper in the first ever edition of the Australasian Journal of Disaster and Trauma Studies, titled “The Effects of a “Benign” Disaster: Symptoms of Post-traumatic Stress in Children Following a Series of Volcanic Eruptions”. Over the next 23 years, Kevin and his many colleagues pursued aspects of children and disasters to both improve practice and advance scholarship in this area. In March 2020 we were saddened by the untimely passing of Kevin. As a tribute to Professor Ronan this special issue of the Australasian Journal of Disaster and Trauma Studies brings together accounts of current research and practice initiatives inspired by, building upon, and directly influenced by Professor Ronan’s work
Privilege and Property. Essays on the History of Copyright
No full textCopyright law is the site of significant contemporary controversy. In recent years copyright history has transformed as a subject from being one of interest to a few books historians to the focus of sustained historical investigation attracting the attention of scholars from across the humanities. This book comprises a collection of essays on copyright history by leading experts drawn from a range of countries and disciplinary perspectives.
Covering the period from 1450 to 1900, these essays engage with a number of related themes. The first considers the general movement, from the sixteenth century onwards, from privilege to property-based conceptions of copyright protection. The second addresses the relationship between the protection provided for literary and print materials and that provided for other forms of cultural production. The third concerns the significance and relevance of these various histories in shaping and informing contemporary policy and academic practice.
Essays include:
0. The History of Copyright History, by Kretschmer, Deazley & Bently;
1. From Gunpowder to Print: The Common Origins of Copyright and Patent, by Joanna Kostylo;
2. A Mongrel of early modern copyright: Scotland in European Persepctive, by Alastair Mann;
3. The Public Sphere and the Emergence of Copyright: Areopagitica, the Stationers’ Company, and the Statute of Anne, by Mark Rose;
4. Early American Printing Privileges: the Ambivalent Origins of Authors’ Copyright in America, by Oren Bracha;
5. Author and Work in the French Print Privileges System: Some Milestones, by Laurent Pfister;
6. A Venetian Experiment on Perpetual Copyright, by Maurizio Borghi;
7. Les formalités son mortes, vive les formalities! Copyright formalities in nineteenth century Europe, by Stef van Gompel;
8. The Berlin Publisher Friedrich Nicolai and the reprinting sections of the Prussian Statute Book of 1794, by Friedemann Kawohl;
9. Nineteenth Century Controversies relating to the protection of Artistic Property in France, by Frédéric Rideau;
10. Maps, Views and Ornament. Visualising Property in Art and Law: The Case of pre-modern France, by Katie Scott;
11. Breaking the Mould? The Radical Nature of the Fine Art Copyright Bill 1862, by Ronan Deazley;
12. ‘Neither bolt nor chain, iron safe nor private watchman, can prevent the theft of words’: The birth of the performing right in Britain, by Isabella Alexander;
13. The Return of the Commons: Copyright History as a Common Source, by Karl-Nikolaus Peifer;
14. The Significance of Copyright History for the Publishing History and Historians, by John Feather;
15. Metaphors of Intellectual Property, by William St Clair.
The volume is a companion to the digital archive Primary Sources on Copyright (1450-1900), funded by the UK Arts and Humanities Research Council (AHRC): www.copyrighthistory.or
Progress and Distress on the Stratford Estate in Clare during the Eighteen Forties
No full textIn the late 1980s and early 1990s, the author acquired about 30,000 letters written mainly in the 1840s. These pertained to estates throughout Ireland managed by James Robert Stewart and Joseph Kincaid, hereafter denoted SK. Until the letters - called the SK correspondence in what follows - became the author’s property, they had not seen light of day since the 1840s. Addressed mainly to the SK office in Dublin, they were written mainly by landlords, tenants, the partners in SK, local agents, etc. After about 200 years in operation as a land agency, the firm in which members of the Stewart family were the principal partners - Messrs J. R. Stewart & Son(s) from the mid-1880s onwards -- ceased business in the mid-1980s. Since 1994 the author has been researching the SK correspondence of the 1840s. It gives many new insights into economic and social conditions in Ireland during the decade of the great famine, and into the operation of Ireland’s most important land agency during those years. It is intended ultimately to publish details on several of the estates managed by SK in book form. The proposed title is Landlords, Tenants, Famine: Business of an Irish Land Agency in the 1840s, a draft of which has now been completed. A majority of the letters in the larger study from which the present article is drawn are on themes some of which one might expect - rents, distraint (seizure of assets in lieu of rent) ; ‘voluntary’ surrender of land in return for ‘compensation’ upon peacefully quitting; formal ejectment (a matter of last resort on estates managed by SK); landlord-assisted emigration (on a scale much more extensive than most historians of Ireland in the 1840s appear to believe); petitions from tenants; complaints by tenants, both about other tenants and local agents; major works of improvement (on almost all of the estates managed by SK); applications by SK, on behalf of proprietors, for government loans to finance improvements; recommendations of agricultural advisers hired by SK, ete. Thus, most of the SK correspondence is about aspects of estate management. It seems, in the 1840s, that the only estate in Clare managed by SK was that of the elderly Col. Stratford. Although the files on the relatively small Stratford estate are much less extensive than those on some of the estates investigated in detail in the draft of Landlords, Tenants, Famine, they do refer to most of the core aspects of estate management mentioned above. But in the case of the Clare estate, the material on some of those themes is extremely thin.
Sonar bat for visually impaired people
No full textVisually impaired people have many difficulties when traveling because it is impossible for them to detect obstacles that stand in their way.
Bats instead of using the sight to detect these obstacles use a method based on ultrasounds, as their sense of hearing is much more developed than that of sight.
The aim of the project is to design and build a device based on the method used by the bats to detect obstacles and transmit this information to people with vision problems to improve their skills.
The method involves sending ultrasonic waves and analyzing the echoes produced when these waves collide with an obstacle. The sent signals are pulses and the information needed is the time elapsed from we send a pulse to receive the echo produced. The speed of sound is fixed within the same environment, so measuring the time it takes the wave to make the return trip, we can easily know the distance where the object is located.
To build the device we have to design the necessary circuits, fabricate printed circuit boards and mount the components. We also have to design a program that would work within the digital part, which will be responsible for performing distance calculations and generate the signals with the information for the user.
The circuits are the emitter and the receiver. The transmitter circuit is responsible for generating the signals that we will use. We use an ultrasonic transmitter which operates at 40 kHz so the sent pulses have to be modulated with this frequency. For this we generate a 40 kHz wave with an astable multivibrator formed by NAND gates and a train of pulses with a timer. The signal is the product of these two signals.
The circuit of the receiver is a signal conditioner which transforms the signals received by the ultrasonic receiver in square pulses. The received signals have a 40 kHz carrier, low voltage and very different shapes. In the signal conditioner we will amplify the voltage to appropriate levels, eliminate the component of 40 kHz and make the shape of the pulses square to use them digitally.
To simplify the design and manufacturing process in the digital part of the device we will use the Arduino platform. The pulses sent and received echoes enter through input pins with suitable voltage levels.
In the Arduino, our program will poll these two signals storing the time when a pulse occurs. These time values are analyzed and used to generate an audible signal with the user information. This information is stored in the frequency of the signal, so that the generated signal frequency varies depending on the distance at which the objects are.
RESUMEN
Las personas con discapacidad visual tienen muchas dificultades a la hora de desplazarse ya que les es imposible poder detectar los obstáculos que se interpongan en su camino.
Los murciélagos en vez de usar la vista para detectar estos obstáculos utilizan un método basado en ultrasonidos, ya que su sentido del oído está mucho más desarrollado que el de la vista.
El objetivo del proyecto es diseñar y construir un dispositivo basado en el método usado por los murciélagos para detectar obstáculos y que pueda ser usado por las personas con problemas en la vista para mejorar sus capacidades.
El método utilizado consiste en enviar ondas de ultrasonidos y analizar el eco producido cuando estas ondas chocan con algún obstáculo. Las señales enviadas tendrán forma de pulsos y la información necesaria es el tiempo transcurrido entre que enviamos un pulso y recibimos el eco producido. La velocidad del sonido es fija dentro de un mismo entorno, por lo que midiendo el tiempo que tarda la onda en hacer el viaje de ida y vuelta podemos fácilmente conocer la distancia a la que se encuentra el objeto.
Para construir el dispositivo tendremos que diseñar los circuitos necesarios, fabricar las placas de circuito impreso y montar los componentes. También deberemos diseñar el programa que funcionara dentro de la parte digital, que será el encargado de realizar los cálculos de la distancia y de generar las señales con la información para el usuario.
Los circuitos diseñados corresponden uno al emisor y otro al receptor. El circuito emisor es el encargado de generar las señales que vamos a emitir. Vamos a usar un emisor de ultrasonidos que funciona a 40 kHz por lo que los pulsos que enviemos van a tener que estar modulados con esta frecuencia. Para ello generamos una onda de 40 kHz mediante un multivibrador aestable formado por puertas NAND y un tren de pulsos con un timer. La señal enviada es el producto de estas dos señales.
El circuito de la parte del receptor es un acondicionador de señal que transforma las señales recibidas por el receptor de ultrasonidos en pulsos cuadrados. Las señales recibidas tienen una portadora de 40 kHz para poder usarlas con el receptor de ultrasonidos, bajo voltaje y formas muy diversas. En el acondicionador de señal amplificaremos el voltaje a niveles adecuados además de eliminar la componente de 40 kHz y conseguir pulsos cuadrados que podamos usar de forma digital.
Para simplificar el proceso de diseño y fabricación en la parte digital del dispositivo usaremos la plataforma Arduino. Las señales correspondientes el envío de los pulsos y a la recepción de los ecos entraran por pines de entrada después de haber adaptado los niveles de voltaje.
En el Arduino, nuestro programa sondeara estas dos señales almacenando el tiempo en el que se produce un pulso. Estos valores de tiempo se analizan y se usan para generar una señal audible con la información para el usuario. Esta información ira almacenada en la frecuencia de la señal, por lo que la señal generada variará su frecuencia en función de la distancia a la que se encuentren los objetos
A Study on the Fashion Design of Ronan Bouroullec’s Felt-pen Drawing by Applying the Formality : Focusing on cutting tape embroidery
No full text패션은 다양한 분야와의 접목을 통해 표현 영역을 점차 확대하고 있으며, 특히 미술은 중요한 영감의 원천이 되어왔다. 드로잉은 작가의 생각을 구체화하는 발상의 과정인 동시에 직관을 드러내는 창조 행위의 시작으로서, 선으로 그리는 스케치의 의미를 넘어 작가의 개성이 담긴 하나의 작품으로써 평가되기도 한다. 하지만 기존의 패션디자인 연구에서는 드로잉을 접목한 사례가 많지 않다.
이에 본 연구는 로낭 부훌렉 드로잉 작품 중 펠트펜 드로잉에 나타나는 조형성을 응용한 패션디자인에 관하여 연구하였다. 로낭 부훌렉은 유기적인 현대 디자인의 새로운 방향을 모색한 작가로, 그의 드로잉 작업은 독자적인 예술적 가치를 지닌 작품으로 평가받고 있다. 본 연구에서는 이러한 로낭 부훌렉 펠트펜 드로잉의 부드럽고 유기적인 선의 흐름, 반복과 겹침에 의한 시각적 질감을 촉각적 질감으로 표현하기 위해 컷 테이프 자수 기법을 디자인에 접목하였다.
본 연구의 목적은 로낭 부훌렉 펠트펜 드로잉을 컷 테이프 자수 기법을 중심으로 패션디자인에 응용함으로써, 패션의 모티프로서 드로잉의 가치를 재발견하고 패션디자인의 표현영역을 확대하는 데에 있다.
본 연구의 내용 및 방법은 다음과 같다. 이론적 배경에서는 로낭 부훌렉의 작품세계와 펠트펜 드로잉에 관하여 살펴보고, 로낭 부훌렉 펠트펜 드로잉의 조형적 특성을 분석한다. 또한 표현 기법으로써 선택한 테이프 자수 기법의 정의와 종류, 이를 응용한 패션디자인 사례를 분석한다. 분석한 이론적 배경을 토대로 로낭 부훌렉 펠트펜 드로잉의 조형성을 응용한 실물 작품 5벌을 제작한다.
본 연구를 통해 도출된 결론은 다음과 같다.
첫째, 작품의 모티프로서 로낭 부훌렉의 펠트펜 드로잉은 곡선과 직선의 혼합과굵기의 다양한 변화, 반복된 선의 방향성으로 인해 자유롭고 유기적인 선의 흐름을 표현하기에 적합하였다.
둘째, 로낭 부훌렉 드로잉을 테이프 자수 기법으로 표현한 결과, 테이프의 반복과 겹침에 의해 요철감과 결을 형성함으로써 드로잉에 나타난 시각적 질감을 촉각적 질감으로 전환하기에 효과적이었다. 또한 바이어스 컷 테이프의 중첩에 의한 연속면은 밀도 변화에 따라 섬세한 드로잉의 결의 이미지와 볼륨감을 표현하기에 적합하였다.
셋째, 작품의 소재에 있어서 투시성이 있는 반투명의 오간자는 로낭 부훌렉의 펠트펜 드로잉에 나타난 투명감과 중첩의 효과를 부각하기에 적합하였다.
넷째, 로낭 부훌렉의 펠트펜 드로잉에 나타난 주된 색조인 ‘light clear&apos;를 작품에 적용한 결과, 로낭 부훌렉 드로잉에서 나타나는 부드럽고 맑은 이미지를 보다 강조할 수 있었다.
본 연구는 로낭 부훌렉의 펠트펜 드로잉 작품에 나타나는 조형적 특성을 테이프 자수 기법을 통해 패션디자인에 응용하고자 하였다. 이를 통해 패션의 모티프로서 드로잉 작품이 유기적인 선의 흐름을 창출할 수 있음을 확인할 수 있었으며, 컷 테이프 자수 기법이 시각적 질감을 촉각적 질감으로 전환하기에 효과적인 기법임을 확인할 수 있었다. 본 연구를 통해 드로잉을 접목한 다양한 시도가 보다 확대되길 기대한다.
;Fashion has gradually expanded its expressiveness through its interlinking with various fields, and art in particular has been an important source of inspiration. Drawing is the beginning of an act of creativity that embodies the author&apos;s ideas and also reveals his intuition, and is considered to be a work of the writer&apos;s individuality beyond the meaning of a line sketch. However, not many existing fashion design studies have incorporated drawing.
In this study, we studied fashion design that applied the formative properties of felt-pen drawing among Ronan Bouroullec drawing works. Ronan Bouroullec is an author who has sought a new direction in organic modern design, and his drawing work is regarded as a work of independent artistic value. In this study, a cut tape embroidery technique was incorporated into the design to express the smooth and organic flow of lines in these Ronan Bouroullec felt-tongued visual texture by repetition and overlap as tactile
The purpose of this study is to rediscover the value of drawing as a fashion motif and expand the area of expression in fashion design by applying Ronan Bouroullec felt-pen drawing to fashion design with a focus on cut tape embroidery technique.
The content and methods of this study are as follows. In the theoretical background, we examine the work world of Ronan Bouroullec and the felt-pen drawing, and analyze the modeling characteristics of Ronan Bouroullec felt-pen drawing. It also analyzes the definition and type of tape embroidery technique selected as an expression technique, and the fashion design case in which it is applied. Based on the theoretical background analyzed, five real-life works that apply the formative nature of Ronan Bouroullec felt-pen drawing will be produced.
The conclusions drawn from this study are as follows:
First, the felt-pen drawing of Ronan Bouroullec as the motif of the work was suitable to express the flow of free and organic lines due to the mixture of curves and straight lines, various changes in thickness, and the direction of repeated lines.
Second, as a result of expressing Ronan Bouroullec drawing with tape embroidery technique, it was effective to convert the visual texture shown in drawing into tactile texture by forming bumps and cones by repetition and overlap of tape. In particular, continuous surfaces by bias cut tapes were suitable for expressing resolution images and volumetric feelings of fine drawing with varying density.
Third, the translucent Oganza, which were visible in the subject matter of the work, was suitable to highlight the effect of transparency and overlay shown in the felt-pen drawing of Ronan Bouroullec.
Fourth, as a result of applying light clear, the primary shade of color in the felt-pen drawing of Ronan Bouroullec, to the work, the soft and clear image of Ronan Bouroullec was more emphasized.
This study intended to apply the plastic characteristics of Ronan Bouroullec&apos;s felt-pen drawing work to fashion design through tape embroidery techniques. This confirmed that drawing work as a motif of fashion can create an organic stream of lines, and that cutting tape embroidery technique is an effective technique for converting visual texture into tactile texture. It is hoped that the various attempts to graft drawing will be further expanded through this study.Ⅰ. 서론 1
A. 연구의 목적 1
B. 연구 방법과 내용 2
Ⅱ. 이론적 배경 3
A. 로낭 부훌렉의 드로잉에 관한 고찰 3
1. 로낭 부훌렉의 작품세계와 펠트펜 드로잉 3
2. 로낭 부훌렉 펠트펜 드로잉의 조형적 특성 17
B. 테이프 자수에 관한 고찰 26
1. 테이프 자수 기법의 종류 27
2. 컷 테이프 자수 기법을 활용한 패션디자인 사례 32
Ⅲ. 작품 제작 및 해설 37
A. 작품 제작 의도 및 방법 37
B. 작품 및 해설 41
Ⅳ. 결론 83
참고문헌 85
ABSTRACT 8
Material culture in rural Ireland
No full textThe objective of this thesis is to explore theatrical space and the cultural relationship of materials as they are experienced by people in rural Ireland. The method involved the investigation of five handball alleys in Co.Mayo, the identification of materials and the location of the sources of those materials. The results found that one of these handball alleys was part of an urban arrangement of theatrical spaces. The alley was no longer in use, in a state of disrepair and the materiality experience was lost due to the ivy covering the walls. I propose for this project a reuse of the site as a theatre with poetry with an associated playwright hostel, using this to explore a nomenological approach to design through the relationship of old and new materials with reference to past and present culture.TOC: Introduction / Primer projects in Shannon and Hamburg / Chapter One - Theatrical Space / -Theatre in everyday life / -Three Theatre Experiences / Chapter Two - Material / -Physicality of materials / -Sense of Place / Chapter Three - Investigation / -Learning From Alleys / -Advanced Construction / Conclusion - Final Presentation / Bibliograph
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