1,721,180 research outputs found
Cloning and expression of aminoglycoside phosphotransferase gene (APH) from a butirosin producing strain of Bacillus circulans
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:DX178845 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Common Fixed Point Theorems of Integral Type Contraction on Metric Spaces and Its Applications To System of Functional Equations
No full textERHAN, INCI M./0000-0001-6042-3695; Sarwar, Muhammad/0000-0003-3904-8442In this article, using the common (CLR) property, common fixed point results for two pairs of weakly compatible mappings satisfying contractive condition of integral type on metric spaces are established. Furthermore, the existence and uniqueness of common solution for system of functional equations arising in dynamic programming are discussed as an application of a common fixed point theorem presented in this paper
Amidoxime porous polymers for CO2 capture
No full textCO2 capture from fossil fuel based electricity generation remains costly since new power plants with monoethanol amine (MEA) as the scrubbing agent are under construction. Amidoximes are known to mimic MEA, and porous polymers with amidoximes could offer a sustainable solution to carbon capture. Here we report the first amidoxime porous polymers (APPs) where aromatic polyamides (aramids) having amidoxime pendant groups were synthesized through low temperature condensation of 4,4'-oxydianiline (ODA) and p-phenylene diamine (p-PDA) with a new type of nitrile-bearing aromatic diacid chloride. The nitrile pendant groups of the polyamides were converted to an amidoxime functionality by a rapid hydroxylamine addition (APP-1 and APP-2). The CO2 adsorption capacities of these polyamides were measured at low pressure (1 bar) and two different temperatures (273 and 298 K) and high pressure (up to 225 bar - the highest measuring pressure to date) at 318 K. The low pressure CO2 uptake of APP-1 was found to be 0.32 mmol g(-1) compared with APP-2 (0.07 mmol g(-1)) at 273 K, whereas at high pressure they showed a substantial increase in CO2 adsorption capacity exhibiting 24.69 and 11.67 mmol g(-1) for APP-1 and APP-2 respectively. Both aramids were found to be solution processable, enabling membrane applications
Vehicle-assisted bridge damage assessment using deep learning
No full textThis thesis introduces innovative methodologies for vehicle-assisted bridge health monitoring, aiming to improve maintenance procedures of ageing infrastructure, a critical concern for transport network owners. By taking advantage of advancements in sensing technology and the increasing interconnectivity between vehicles and infrastructure, these methodologies focus on developing an automated bridge assessment method that efficiently evaluates the current condition of bridge structures. This approach enables more accurate and timely maintenance decisions.
The primary objective of this thesis is to create an automated bridge assessment framework for existing bridges by harnessing the synergy between sensors installed on structures and signals transmitted by passing vehicles. By gathering comprehensive information from various sources, including vehicles and the bridge itself, and fusing this data using deep learning techniques, the framework efficiently evaluates the current condition of bridge structures, facilitating more precise and prompt maintenance decisions.
The thesis comprises several studies investigating deep learning techniques, such as deep autoencoders (DAE) and probabilistic temporal autoencoders (PTAE), for extracting features and capturing temporal relationships in the data. This enables accurate identification and quantification of potential damage in bridge structures.
The first study (Paper IA IB) examines an indirect bridge monitoring system using vertical acceleration responses from a fleet of vehicles passing over a healthy bridge. This study’s findings reveal that the error in signal reconstruction from the trained DAE is sensitive to damage, considering the distribution of results from multiple separate vehicle-crossing events. The proposed method proves effective in detecting damage under operational conditions and demonstrates potential as a new tool for cost-effective bridge health monitoring.
The second study introduces a methodology for assessing bridge conditions using a PTAE and multi-sensor data from a fixed sensing framework, collected during train crossings. The study’s results indicate that the proposed method can detect damage with a limited number of sensors, making it a valuable approach to enhance bridge safety. An Exponentially Weighted Moving Average (EWMA) filter and a control chartbased threshold mechanism are applied to further refine the damage assessment process, distinguishing between healthy and progressively deteriorating damage cases.
The third study proposes a Probabilistic Deep Neural Network framework for damage assessment, combining vehicle and bridge responses to extract damage-sensitive features for classifying different damage states. The findings of this study demonstrate that incorporating multiple sensor information reduces uncertainties in damage detection and localisation. The results also suggest that the proposed method is robust in handling measurement noise and varying environmental conditions.
In conclusion, this thesis advances knowledge in the field of structural assessment through structural health monitoring by providing insights and improvements in techniques and methodologies. By taking advantage of the combined strengths of sensors mounted on structures and signals transmitted by moving vehicles, the developed methodologies provide reliable and precise damage evaluation capabilities. These valuable insights enhance bridge safety, improve resource allocation, and contribute to the overall performance of transport networks. Ultimately, this approach leads to more sustainable and resilient infrastructure, better equipped to handle modern society’s growing demands
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Life Cycle and Development of Diptera
Full text linkDiptera, or true flies, are of considerable economic importance, as these flies have a valuable role as scavengers, parasitoids and predators of other insects, pollinators, food for predators, bio-indicators of water quality, and tools for scientific research. In nine chapters, this book examines various aspects of flies of the order Diptera as well as some types of mosquitos and midges. Topics covered include taxonomy, phylogeny, life cycle, feeding habits, population control strategies, and more. A unique chapter on forensic entomology is particularly interesting. Beautifully illustrated and expertly researched, this volume will appeal to entomologists, biologists, and naturalists
Life Cycle and Development of Diptera
No full textDiptera, or true flies, are of considerable economic importance, as these flies have a valuable role as scavengers, parasitoids and predators of other insects, pollinators, food for predators, bio-indicators of water quality, and tools for scientific research. In nine chapters, this book examines various aspects of flies of the order Diptera as well as some types of mosquitos and midges. Topics covered include taxonomy, phylogeny, life cycle, feeding habits, population control strategies, and more. A unique chapter on forensic entomology is particularly interesting. Beautifully illustrated and expertly researched, this volume will appeal to entomologists, biologists, and naturalists
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