Dissertations / Theses on the topic 'Iris code'

In recent years, computing power and biometric sensors have not only become more powerful, but also more affordable to the general public. In turn, there has been great interest in developing and deploying biometric personal ID systems. Unlike the conventional security systems that often require people to provide artificial identification for verification, i.e. password or algorithmic generated keys, biometric security systems use an individual's biometric measurements, including fingerprint, face, hand geometry, and iris. It is believed that these measurements are unique to the individual, making them much more reliable and less likely to be stolen, lost, forgotten, or forged. Among these biometric measurements, the iris is regarded as one of the most reliable and accurate security approaches because it is an internal organ protected by the body's own biological mechanisms. It is easy to access, and almost impossible to modify without the risk of damaging the iris. Although there have been significant advancements in developing iris-based identification processes during recent years, there remains significant room for improvement. This dissertation presents a novel approach to the iris localization and code matching. It uses a fixed diameter method and a parabolic curve fitting approach for locating the iris and eyelids as well as a k-d tree for iris matching. The iris recognition rate is improved by accurately locating the eyelids and eliminating the signal noise in an eye image. Furthermore, the overall system performance is increased significantly by using a partial iris image and taking the advantage of the k-d binary tree. We present the research results of four processing stages of iris recognition: localization, normalization, feature extraction, and code matching. The localization process is based on histogram analysis, morphological process, Canny edge detection, and parabolic curve fitting. The normalization process adopts Daugman's rubber-sheet approach and converts the iris image from Cartesian coordinators to polar coordinates. In the feature extraction process, the feature vectors are created and quantized using 1-D Log-Gabor wavelet. Finally, the iris code matching process is conducted using a k-dimensional binary tree and Hamming distance.

ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV
A field programmable gate array (FPGA) is used to decode Inter-Range Instrumentation Group (IRIG) time code for a PC-based Time-Space-Position Information (TSPI) acquisition. The FPGA architecture can latch time via an external event trigger or a programmable periodic internal event. By syncing time with an external IRIG Group Type B (IRIG-B) signal and using an 8 megahertz (MHz) internal clock, captured time has 125 nanosecond (ns) precision. A Range Instrumentation Control System (RICS) application utilizing the FPGA design to capture IRIG time is presented and test results show matching time accuracy when compared to commercial IRIG time capture hardware components.

Extract: [...]Intriguing as they undoubtedly are, the early sixteenth-century lists of books in the Earl of Kildare’s library may well have inadvertently helped to lull scholars into visualising a rather idealised picture of language balance in multilingual late medieval Ireland. The lists reflect a society in which the four languages, Irish, English, Latin and French, vied as scholarly media and where the outcome in the Earl’s library was a four-way photo-finish. The number of volumes in each of the languages was recorded as follows: Latin, 34; French, 35; English, 22; Irish, 20 (Mac Niocaill 1992: 312-314). But of course the multilingual contact situation in Ireland had always been quite dynamic, both at vernacular and at scholarly levels, following the Anglo-Norman invasion of 1169. Although French continued to be employed in official documents into the second half of the 15th century, it had already ceded its vernacular role to English in the towns of the colonists prior to the drawing up of the Statutes of Kilkenny in 1366. These Statutes, composed in Norman-French, the primary language of English law at the time, provide an earlier snapshot of the language situation within the areas under English jurisdiction, as they sought to compel the colonists to desist from adopting Irish as a community vernacular. Ironically, no mention is made of Norman-French in the Statutes themselves. It is clear that what was at issue was a contest for supremacy between Irish and English as the principal vernacular among the colonists.[...]

International Telemetering Conference Proceedings / October 30-November 02, 1989 / Town & Country Hotel & Convention Center, San Diego, California
Computer based data acquisition and signal processing systems have evolved from computers developed for more generic applications. As a result of less technical origins, current computer systems have Real Time Clocks (RTC's) that are relatively inaccurate and which can not be automatically synchronized to external time standards. The imbedded bus level time code processor modules described in this article in conjunction with Universal Time Coordinate (UTC) standard time receivers and standard InterRange Instrumentation Group time code signals provide a substitute source of time data, a source that overcomes the limitations of conventional Real Time Clock devices. To illustrate system synchronization with the use of bus level time code processors, a hypothetical multi-location, multi-processor data acquisition system is described which uses: 1> Global Positioning Satellite receivers to acquire UTC time, 2> InterRange Instrumentation Group (IRIG) time code as the local time distribution technique, and 3> bus level time code modules to extract time data from the IRIG time code. Each of these three elements (receivers, time code signal, bus level module) has various selection possibilities with an associated impact on system time accuracy. It is shown that, with selection care, 1 microsecond absolute time accuracy for each processor can be obtained and 1 millisecond accuracy is routinely available.

This study sets out to analyse the pervasive and profound impact of European integration on national patterns of policy making within the core executive. As a comparative study of the UK and Ireland it explores how national EU policy is coordinated and projected, and explains how and why this process has changed over the past decade. The study aims to shape the nature and direction of research in this dynamic field in two key respects. First, it makes an innovative contribution to the concept and analysis of Europeanisation within the core executive, delineating between five distinctive modes through which change may be induced. It does so by rejecting conventional 'top down' accounts of domestic change in favour of a 'bottom up' research design that allows us to attribute relative causation to European integration. Second, the study adds considerable value to existing empirical accounts of domestic change by employing a distinctive strategic-relational network framework in order to map the changing face of policy making within the UK and Irish EU policy networks, and to evaluate and explain the impact of adaptation over time and its potential implications for policy outcomes. This provides a far more dynamic picture of domestic adaptation.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
A presente pesquisa aborda a discussão sobre a religiosidade cristã no cárcere, enquanto possibilidade de discurso norteador de condutas individuais e coletivas. A presença de religiosos de confissões cristãs nas instituições penais demonstra a importância desse segmento na dinâmica social da prisão e evidencia de maneira clara as diferenças entre o comportamento dos detentos não religiosos e os que professam a religiosidade cristã, sobretudo evangélica. Nesse sentido, a pesquisa, realizada na Penitenciária Professor Ariosvaldo de Campos Pires, em Juiz de Fora, trata das especificidades das condutas adotadas pelos detentos convertidos à religiosidade evangélica, sua influência na dinâmica social do cárcere e no cotidiano das relações que ali se desenvolvem. Para tanto, utilizo dois conceitos principais: o de “proceder” – que designa um complexo número de regras criadas por e seguidas ou não pelos detentos – conforme elaboração de Marques (2009) - e o de “conversão religiosa”, utilizado no sentido de mudança de visão de mundo do fiel. Constatei que, a partir da conversão, o detento passaria por uma reforma moral subjetiva que se reflete em sua interação com o coletivo e, assim, daria seguimento aos preceitos e valores cristãos em forma de uma conduta moralmente aceitável, resultando o “proceder evangélico”, ou seja, espécie de código de condutas seguido por presos religiosos. Os detentos que aderem a tal “proceder” sofrem intensa vigilância (tanto por parte dos próprios detentos, como pelos funcionários em geral) como forma de teste de sua fé, de modo que não podem cometer nenhuma contravenção, o que nos leva à compreensão de que há certa noção de moralidade religiosa que norteia tanto quem vigia quanto quem é vigiado. Assim, o “proceder” religioso consistiria numa prática ou conduta que se orienta pela moralidade – palavra – cristã. A pesquisa foi realizada na Penitenciária Professor Ariosvaldo de Campos Pires, Juiz de Fora.
The present research deals with the discussion about Christian religiosity in prison, as a possibility of guiding discourse of individual and collective conduct. The presence of religious of Christian confessions in penal institutions demonstrates the importance of this segment in the social dynamics of prison and clearly evidences the differences between the behavior of non-religious detainees and those who profess Christian religiosity, especially evangelical. In this sense, the research, carried out at Professor Ariovasdo de Campos Pires Penitentiary, in Juiz de Fora, deals with the specificities of the conduct adopted by detainees converted to evangelical religiosity, its influence on the social dynamics of the prison and the daily life of the relationships that are developed there. For this purpose, I use two main concepts: that of "proceeding" - which designates a complex number of rules created by and followed or not by detainees - as elaborated by Marques (2009) - and that of "religious conversion", used in the sense of worldview change of the faithful. I observed that, from the conversion, the detainee would go through a subjective moral reform that reflects in his interaction with the collective and, thus, would follow up Christian precepts and values in form of a morally acceptable conduct, resulting in "evangelical conduct", in other words, a kind of code of conduct followed by religious prisoners. Detainees who adhere to such "proceeding" are subjected to intense vigilance (both by detainees themselves and by officials in general) as a way of testing their faith, so that they cannot commit any contravention, which leads us to a comprehension that there is a certain notion of religious morality that guides both those who watch and those who are watched. Thus, religious "proceeding" would consist of a practice or conduct that is oriented by morality – Christian word. The research was carried out at Professor Ariosvaldo de Campos Pires Penitentiary, Juiz de Fora.

ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada
The Western Aeronautical Test Range (WATR) staff at the NASA Dryden Flight Research Center is developing a translation software called Chapter 10 Tools in response to challenges posed by post-flight processing data files originating from various on-board digital recorders that follow the Range Commanders Council Inter-Range Instrumentation Group (IRIG) 106 Chapter 10 Digital Recording Standard but use differing interpretations of the Standard. The software will read the date files regardless of the vendor implementation of the source recorder, displaying data, identifying and correcting errors, and producing a data file that can be successfully processed post-flight.

International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California
Due to the vast amount of data required to be collected for design/performance analysis of operational and development systems, there has evolved a real requirement for a high-speed, large capacity, data collection/record system in a small Flight/Ruggedized package. This need is realized by several user communities and factors which include the evolution of small operational vehicles (airborne, land and UAV’s), the desire of weapons manufacturers/integrators to be independent from the vehicle during vehicle integration, and a general need for a field/airborne, reliable portable data collection system for intelligence gathering, operational performance verification and on-board data processing. In the Air Defence community, the need for a ruggedized record system was highlighted after Desert Storm, in which the operational performance of the Patriot Missile was questioned and data collection was not performed to support the performance. The Aydin Vector Division in conjunction with the prime contractor, has come up with a solution to this problem which utilizes a commercially available helical scan 8mm data storage unit. This solution provides a highly reliable record system, ruggedized for airborne and field environments and a low price in comparison with the more traditional approaches currently offered. This paper will describe the design implementation of this small ruggedized, flight worthy Data collection system deemed the ATD-800. It will also discuss the performance and limitations of implementing such a system, as well as provide several applications and solutions to different operational environments to be encountered. Additionally, the paper will conclude with several product enhancements which may benefit the flight test, operational and intelligence communities in the future.

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada
Today’s telemetry systems can reduce spectrum demand and maintain secure voice by encoding analog voice into digital data using; Continuously Variable Slope Delta Modulation ( CVSD ) format and imbedding it into a telemetry stream. The model CSC-0390 DvD system is an excellent choice in decoding digital voice, designed with flexibility, efficiency, and simplicity in mind. Flexibility in design brings forth a capability of operating on a wide variety of telemetry systems and data formats without any specialized interfaces. The utilization of 74HC series circuit technology makes this DvD system efficient in design, low cost, and lower power consumption. In addition the front panel display and control function is also is an example of Simplicity in design and operation.

International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California
Although PCM/TDM framed data is one of the most prevalent formats handled by flight test ranges, it is often required to acquire and process other types. Examples of such non-standard data types are radar position information and meteorological data from both ground based and radiosonde systems. To facilitate the process and management of such non-standard data types, a micro-processor based system was developed to acquire and transform them into a standard PCM/TDM data frame. This obviated the expense of developing additional special software and hardware to handle such non-standard data types.

碩士
國立暨南國際大學
電機工程學系
91
Abstract In traditional symmetric key cryptosystems, there exist some problems such as cryptographic key generation, management of enormous number of cryptographic keys and authentication of clients’ identity. Although asymmetric key cryptosystems can solve those problems, it is a serious drawback that they cannot encrypt and decrypt data fast. The iris codes are very different since the iris features of human eyes exhibit the high degree of uniqueness. By replacing the traditional DES Iterate table rule with a new iris-code, called iris-cipherkey, constructed from an iris code, the modified DES system, called the Iris Data Encrypted System ﹝IDES﹞, can provide fast encryption and decryption and is more complex than the traditional DES system. Also, by integrating an iris recognition system, the IDES system provides a securer client authentication. In addition, the IDES system is easy to manage the cryptographic keys because the iris feature code for each person is unique. By using the iris code-based cipherkey, the IDES cryptographic system can produce a more complex and securer cryptographic key to increase the security of encrypted techniques.

碩士
國立中正大學
電機工程研究所
102
With the network safety becomes more attention, the PIN (Personal Identification Number) recognition usually losses because the negligence or error to accept. In addition, there are several terrorist attacks in the recent years, so that the personal identification recognition becomes more important. Therefore , discarding the annoying password and establishing the uniqueness of identity, return to the “biometric identification system” which based on the human characteristics have been a new trend. The iris recognition technology is one of the biometric identification methods which is the most accurate, but it is limited to the hardware, cost and system resources. In our thesis, we try to apply some methods of image processing to the database, which is provided by CASIA. We use the most undisturbed block of iris in the image which have the most obviously of iris features to do our recognition. The matching rate of the CASIA database could be 96.5%. However, most of iris recognition algorithms are implemented based on sequential operations running on central processing units (CPUs). As result, in our thesis we propose a fast and efficient design for iris recognition and implemented in integration circuit in order to improve the iris recognition performance.

Iris recognition constitutes one of the most powerful method for the iden- tification and authentication of people today. This thesis aims to describe the algorithms used in a sophisticated and mathematically correct way, while re- maining comprehensible. The description of these algorithms is not the only objective of this thesis; the reason they were chosen and potential improvements or substitutions are also discussed. The background of iris recognition, its use in cryptosystems, and the application of error-correcting codes are investigated as well.

Iris recognition constitutes one of the most powerful method for the iden- tification and authentication of people today. This thesis aims to describe the algorithms used by a mathematical apparatus. The description of these algo- rithms is not the only objective of this thesis; the reason they were chosen and potential improvements or substitutions are also discussed. The background of iris recognition, its use in cryptosystems, and the application of error-correcting codes are investigated as well. The second version of the thesis eliminates errata and a quantum of inaccu- racies discovered in the first version, especially in the ROI Definition, the Hough Transform and the Feature Extraction sections. Besides that, it also contains se- veral new propositions. Last, but not least, it shows a potential implementation of the algorithms described by appending pseudocodes to the relevant sections. 1

This dissertation examines the intersection of English Renaissance drama and conduct literature. Current scholarship on this intersection usually interprets plays as illustrations of cultural behavioral norms who find their model and justification in courtly norms. In this dissertation, I argue that plays present behavioral norms that emerge from this nascent profession and that were thus influenced by this profession and the concerns of the people who worked in it, rather than by the court. To do so, I examine three behavioral norms that were important to courtiers, specifically Disguise, Moderation and Wit through the work of the English Renaissance theater's most celebrated professional, William Shakespeare. Shakespeare's plays evince a theatrical code of conduct that, rather than being an illustration of courtly norms, was sometimes in direct contrast to them and sometimes formed an alternate or lateral code. This code shows a distrust of disguise, a lack of interest in moderation and a belief in the need to eschew wit in favor of a happy ending. The modern theater has retained many of these essential behavioral norms, including the value of community above the self, the need for sympathy and compassion, and the willingness to risk.

Thesis (M.M.)--University of Wisconsin--Madison, 1998.
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Translation initiation in the hepatitis C virus (HCV) occurs through a cap- independent mechanism that involves an internal ribosome entry site (IRES) capable of interaction with and utilization of the eukaryotic translational machinery. We focused on the structural configuration of the different HCV-IRES domains and the impact of IRES primary sequence variations on secondary structure conservation and function. For this purpose we introduced into our laboratory, methods such as denaturing gradient and temperature gradient gel electrophoresis for screening the degree of heterogeneity and total amount of HCV-IRES variability accumulated in HCV infected patients over a period of time. The selected samples showed variable migration pattern of the HCV-IRES (from all the patients) visualized in DGGE and TGGE, were sequenced and evaluated for translation efficiency using flow cytometry. In some cases, we discovered that multiple mutations, even those scattered across different domains of HCV-IRES, led to restoration of the HCV-IRES translational activity, although the individual occurrences of these mutations were found to be deleterious. We propose that such observation may be attributed to probable long- range inter- and/or intra-domain functional interactions. We established a large-scale HCV-IRES...