All Saints' College

About: All Saints' College is a based out in . It is known for research contribution in the topics: Crystal structure & Single crystal. The organization has 77 authors who have published 90 publications receiving 1182 citations.

BER and SER Based Performance Analysis of BPSK and QPSK Modulation Schemes with OFDM in Rayleigh Fading Channel

Abstract: BER is a key property of the digital communication system Various types of modulation methods are used in the digital information transmission system BER can be demarcated as the number of received bits of a data stream over a communication channel that can be affected due to noise, interference and distortion or bit synchronization errors OFDM can be seen as either a modulation technique or a multiplexing technique One of the main reasons to use OFDM is to increase the robustness against frequency selective fading or narrowband interference In a single carrier system, a single fade or interferer can cause the entire link to fail, but in a multicarrier system, only a small percentage of the subcarriers will be affected The BPSK digital modulation technique for OFDM system over AWGN and Rayleigh fading channels From comparison we can observe that the OFDM- BPSK modulation has no any specific advantage over a conventional BPSK modulation scheme in AWGN channel but OFDM-BPSK modulation in AWGN channel has great advantage over OFDM-BPSK modulation in Rayleigh fading channel The performance of BER of BPSK over AWGN and Rayleigh channel is compared Simulation of BPSK signals is carried with both AWGN and Rayleigh channel The work provides link level performance analysis of non-line of sight QPSK-OFDM data transmission over Rayleigh fading channels Two scenarios have been considered in this thesis Firstly, the performance of BPSK-OFDM and QPSK-OFDM over the AWGN and Rayleigh channel was obtained Keywords: OFDM,QPSK,BPSK,AWGN,RAYLEIGH CHANNEL

“let nature be your teacher”: tegetmeier's distinctive ornithological studies

Abstract: ONE OF THE GIVENS OF NATURAL history is that it is the observation of wild nature. However, that way of stating the case establishes a boundary between nature and culture, wild and domestic, whereas humans, as Douglas Sackman observes, have shaped what they call nature “into forms that [are] valuable to themselves or others” (171). This shaping of nature is particularly true of William Bernard Tegetmeier's (1816–1912) lavishly illustrated The Poultry Book (1873). A new edition of a work that had sold for one shilling per part in fifteen monthly parts through 1866 to 1867, it carried thirty chromolithograph color plates and ran to three hundred and ninety-two pages. Texts like The Poultry Book belonged to the wider circulation of ideas between the discourses of art, literature, and science that led eventually both to the protection of birds in the wild (Kean 113–15) and to their increasingly scientific management in agriculture.

The ascetic tradition and the English College at Valladolid

Abstract: The history of English Roman Catholicism from the end of the sixteenth century right through to the nineteenth has as one of its main features the rivalries between seculars and regulars, especially between the seculars and the Jesuits. As this dispute primarily, but not exclusively, concerns the clergy it is most clearly seen in the history of those colleges which provided clergy for the English mission. The early history of the English College in Rome is not only the story of English and Welsh rivalry, but of frequent objections to the Jesuit administration and accusations by the seculars of the enticement of students to join the Society. Similar cases are to be found in the history of Saint Alban’s College Valladolid, but in this college there is an added dimension. Not only did the seculars complain about the Jesuits but the Jesuits complained of students being enticed away to the Benedictines. Later, a certain amount of bitterness arose out of the establishment of a college directed by the seculars in Lisbon. The Jesuits considered that they should have been placed in charge. What is more, there were even quarrels among the catholics detained in Wisbech castle. The ‘stirs’ there bore a remarkable resemblance to those at the college in Rome. As Aveling remarks about English Roman Catholicism ‘Historians have been defeated by its immense complexities of ecclesiastical intrigue and embarrassed by its sheer ferocity’. The quarrels not only provoke a feeling of distaste in the modern mind — why couldn’t these people resolve their differences and get on with their spiritual mission? They also instil puzzlement – are these disputes to be explained solely as political intrigue and in-fighting within the Catholic party? If so, how could such a cause appear attractive or plausible? How could such a house divided against itself, stand? I want to suggest that there is an element often overlooked which, although not explaining fully these intrigues and dissensions, nevertheless might help us to understand better what was going on. This can be called the positive attraction of the ascetic ideal. Bossy has stated in reference to the history of the English Catholic community ‘martyrology pointed this subject historiographically speaking up a cul-de-sac’. I want to suggest that cul-de-sac or no, the consideration of martyrdom and of life as a preparation for martyrdom is a path that can lead to a vantage point from which one can view this clerical back biting and contentiousness in a clearer light. Evenett in his Birbeck Lectures in 1951 pleaded for a better integration of the history of spirituality into ecclesiastical history and in particular devoted some space to a consideration of the origins of the Catholic revival in Spain. He pointed out the overlap of those who abandoned the world with those who remained in it, reforming its practice. Speaking of the Carthusians of the sixteenth century he said ‘A larger interest and practical usefulness in the external affairs of the Church were manifest by them at this period than we are accustomed to associate with modern Parkminster or Miraflores’. Following these lines let us turn to certain aspects of Spanish spirituality and its relationship to England.

Characterization of log periodic planar dipole array antenna

Abstract: This paper proposes a analysis approach for characterizing the broadband Log Periodic Planar Dipole Array (LPPDA) antenna useful for C-band applications. A simplest geometry of the edge fed Log Periodic Planar Dipole Array is designed and developed. Parameters like length, width of the elements, and spacing between elements are the varied using defined scale factor (τ) and a spacing factor (σ), keeping others constant and their impact was noted down. A parametric analysis is performed. using CST software. A transmission line equivalent circuit of the proposed LPPDA is constructed. Log periodicity behaviour of the proposed antenna is checked by plotting input impedance with respect to logarithm of frequency. An antenna is fabricated and measured in laboratory.