Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 79 for “"Telegraphy"”.
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Indians on the Line: Everyday Histories of Race, Class and Empire in the Telegraph Service, 1920-1950
The historiography of telegraphy has predominantly examined state-level institutional narratives while understating the technology's impact on colonised populations. This thesis joins nascent scholarship on colonised subjects' interactions with telegraphy in India and Persia, addressing significant …
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The United States, Radio Architecture, and Global Space, 1933--1951
… radio communications network that succeeded telegraphy and telephony and preceded satellites. Rather than concentrating on the hardware of this network, it focuses on the genealogy of conditions for the less tangible but arguably more significant system of communications circuits and radio …
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The history and social significance of motion pictures in South Africa, 1895-1940
… fifty years. The more widespread use of telegraphy, the expansion of the telephone service, the increased application of electricity and the invention of the motor car, the sudden appearance and phenomenal development of the cinema, and finally the invention and speedy public utilisation …
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Managing a sea of information : shipboard command and control in the United States Navy, 1899-1945
… first conducted experiments with wireless telegraphy, through World War II, the conflict which witnessed the birth of the modern shipboard information processing facility. It argues that early-to-mid twentieth century naval officers' development and employment of increasingly sophisticated …
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Telecommunications and underdevelopment: a policy analysis of the historical role of Cable and Wireless in the Caribbean
… to rationalize the innovation of wireless telegraphy with the more established cable network interests. Political de-colonization and the growth in the influence of the large colonial Dominions led to a fracturing of the symbiotic relationship between the private telegraph interests and the …
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Bowu and the Natural World in the Formation of Modern China
… general uses of novel technologies of electric telegraphy. Chapter Three presents a different approach to *bowu* taking place around the same period. The renowned British medical missionary Benjamin Hobson (1816-1873), whose Chinese works introducing Western medical knowledge had been widely …
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Communication with the Other World in Romantic Poetry
… for conversation and precedes the advent of telegraphy and Spiritualism, proves a uniquely fascinating moment of transition in conceptualisations of communication, and poetry most suited to its exploration as a particularly important and problematic communicative medium of the time. …
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Impacts of higher-order dispersion coefficients and dispersion fluctuations on one-pump fiber optical parametric amplifier
Four-wave mixing (FWM) is a nonlinear effect in optical fiber which is useful for fiber optical parametric amplifiers (FOPA). The performance of FOPA i.e. parametric gain, amplification bandwidth, and saturation power are reliant on the efficiency of the FWM process. The random dispersion …
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Modeling and performance evaluation of free space optical link for ground-to-train communications
There is an increased demand for high-speed train (HSR) services. Consequently, onboard high-speed internet access needs increased as passengers travel to and from work. This sudden surge in demand introduced new challenges in delivering a seamless internet connection on-board fast-moving trains. …
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New methods of partial transmit sequence for reducing the high peak-to-average-power ratio with low complexity in the ofdm and f-ofdm systems
The orthogonal frequency division multiplexing system (OFDM) is one of the most important components for the multicarrier waveform design in the wireless communication standards. Consequently, the OFDM system has been adopted by many high-speed wireless standards. However, the high peak-to-average- …
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Joint routing protocol and image compression algorithm for prolonging node lifetime in wireless sensor network
Wireless sensor network (WSN) are among the emerging modern technologies, with a vast range of application in different areas. However, the current WSNs technology faces a key challenge in terms of node lifetime and network connectivity due to limited power resource of the node. The conventional …
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Modulation techniques for GPR system radargram
Ground Penetrating Radar (GPR) system ability to detect embedded object underground is dependent on the ultra-wideband antenna use. Based on this antenna type, the fractional bandwidth used by the GPR system is usually greater or equal to 1. On the other hand, the GPR system using fractional …
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Development of wideband phased array antenna
Wideband communication system covering the range from 4 to 8 GHz requires compact antenna to provide desirable characteristic over whole operating band. This project consists of two designs; first design is presented with optimum geometry of an ultra wideband circular patch antenna. To achieve an …
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Enchancing RFID data quality and reliability using approximate filtering techniques
Radio Frequency Identification (RFID) is an emerging auto-identification technology that uses radio waves to identify and track physical objects without the line of sight. While delivering significant improvements in various aspects, such as, stock management and inventory accuracy, there are …
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An improved negative selection algorithm based on the hybridization of cuckoo search and differential evolution for anomaly detection
The biological immune system (BIS) is characterized by networks of cells, tissues, and organs communicating and working in synchronization. It also has the ability to learn, recognize, and remember, thus providing the solid foundation for the development of Artificial Immune System (AIS). Since the …
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An intrusion detection system for DDoS flooding attacks on IPv6 networks using deep learning techniques
The news about distributed denial of service (DDoS) attacks is rapidly increased around the world. Many services of companies and/or governments are victims of the attack. The main purpose of DDoS attacks is to overload the service for a long time, rather than to steal money or data from the …
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Substrate integrated waveguide microwave antenna and filter design using H-fractal unit cell
Currently, the fifth generation (5G) technology has been assigned for microwave. There are several challenges in developing antennas and filters for 5G devices that need to be addressed such as low efficiency and large size at the lower proposed 5G frequency band (1 GHz -6 GHz). Hence, a compact …
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Pattern reconfigurable metamaterial antenna for 5G base station network
Reconfiguration of an antenna’s radiation pattern in a predefined direction is very important for enhancing the performance of communication systems in terms of the quality of service, system security, avoiding interference, and economizing power. Metamaterials, on the other hand, are commonly used …
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Cloud Computing based Learning Management System (CC-LMS) implementation model in Malaysia Higher Education Institutions
In the education arena, cloud computing is more apparent in technology to ensure the availability and sharing of resources through virtualization. Despite its attractiveness and benefits, the Higher Education Institution (HEIs) are still hesitant to implement cloud computing services due to …
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Multi slot amplitude coding technique for high speed optical fiber communication system
The rapid progress of the high speed optical communications system is driven by the exponential growth of users demand on information and services. The trend towards high speed and high capacity transmission system are multiplexing technique such as electrical time division multiplexing (ETDM) and …
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