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.
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Showing 1 to 20 of 1367 for “"Backbone"”.
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RNA Backbone Rotamers and Chiropraxis
RNA backbone is biologically important with many roles in reactions and interactions, but has historically been a challenge in structural determination. It has many atoms and torsions to place, and often there is less data on it than one might wish. This problem leads to both random and systematic …
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Wide area optical backbone networks
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Double linked backbone ring interconnected network
… is to add a secondary transmission link to the backbone ring of a network to form a double linked backbone ring network. Simulation results show that the most influential element contributing to the degradation of performance is congestion at the bridges in a network. The processing speed of …
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Functional and mechanistic elucidation of peptide backbone thioamidation
… best known to catalyze the ATP-dependent peptide backbone activation and subsequent formation of azoline heterocycles. It has been proposed that YcaO enzymes can also install lactamidines and thioamides onto peptides through similar mechanisms. These modifications are found in a class of natural …
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Modelling protein backbone loops using the Monte Carlo method
… main aim of my work was to study and include backbone moves<br/>for proteins, such as the Concerted Rotation with Angle (CRA) and the<br/>gaussian bias in the ProtoMS package. The CRA was then applied to several<br/>systems of biological interest to compute relative binding free energies …
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Security in Packet-Switched Land Mobile Radio Backbone Networks
… from circuit-switched to packet-switched backbone networks to handle their future communication needs. Due to the unique demands of packet-switched backbone networks for LMR, it may not be wise to carry over the previously implemented security methods used with circuit-switch systems or to …
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Topologies for satellite constellations in a cross-linked space backbone network
… can be formed from satellites serving as both backbone and user-access nodes connected via high-speed cross-links. Such a space backbone network should support spacecraft-to-ground and spacecraft-to-spacecraft links for users of various altitudes (LEO, MEO, GEO and HEO). One main consideration …
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Biophysical mechanisms of intrinsic protein disorder: lessons from a protein backbone model
… To investigate these phenomena, we use a protein backbone model (i.e. oligoglycine) that has been experimentally and computationally shown to exhibit IDR characteristics. Our results suggest that the chain length dependent collapse and aggregation of oligoglycine are due to intra-peptide …
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The Impact Of The National ICT Backbone In Telecommunication Industry In Tanzania
… into the impact of the National ICT broadband backbone in Tanzania which was launched in July 23rd, 2009. The National ICT broadband backbone has been managed and operated by Tanzania Telecommunications Company Limited since its launch up to now. The research will look on the types of contracts …
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Comparativa de modelos backbone en la identificación de especies de aves peruanas
… a través de la identificación del modelo backbone (DenseNet121, Restnet152, GoogleVit y SwinTransformer). Para ello, se desarrolló un dataset que comprende 5.420 imágenes de 20 especies de aves peruanas, incluyendo aquellas clasificadas como en peligro de extinción, vulnerables y otras …
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Aging Changes Cell Mechanics and Dynamics with a Backbone of Cytoplasmic Crowding
Aging is a biological process that is correlated with life-altering and terminal diseases, and while the population of the elderly increases every year, the mechanism behind aging and its physical changes is not fully understood. Many aging studies traditionally focus on molecular-level changes, …
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Mobile backbone architecture for wireless ad-hoc networks : algorithms and performance analysis
… the more capable nodes can serve as Mobile Backbone Nodes and provide a backbone over which end-to-end communication can take place. The main design problem considered in this thesis is that of how to (i) Construct such Mobile Backbone Networks so as to optimize a network performance metric, …
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Structure and Stratigraphy of a Complex Anticlinal Feature, Backbone Anticline, Arkoma Basin, Arkansas
… associated with Ouachita orogenic event. The Backbone anticline in the northern Arkoma Basin is a prominent product of this convergence, and represents the first major component of this study. The structure is asymmetric with beds on the southern limb dipping steeply to the south. It is also …
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Effect of Backbone Structure on Membrane Properties for Poly(arylene ether) Random and Multiblock Copolymers
… can undergo a myriad of modifications including backbone structure variability, sulfonation, and crosslinking. In this dissertation, structure-property relationships are considered for poly(arylene ether)s with regard to membrane applications for proton exchange and gas separation membranes. All …
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Existing regulatory circuitries govern backbone and acquired host association factors in the human pathogen Vibrio parahaemolyticus
… V. parahaemolyticus GacA regulon contained both backbone and horizontally acquired elements that were activated or repressed in a highly selective fashion. Temperature was an important cue in virulence gene activation as determined through phenotypic and transcriptional assays and acted with GacA …
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Characterization of the Burkholderia mallei ∆tonB Mutant and its Potential as a Backbone Attenuated Strain for Vaccine Development
… ∆tonB mutant demonstrates great potential as backbone attenuated strain for vaccine development against both glanders and melioidosis.
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Process-structure-property relationships of resorbable desamino tyrosine derived polymers : effect of backbone chemistry and assembly on drug delivery
… of the properties of the material by changing backbone or pendent chain structure. L-tyrosine derived polyarylate is one of the class of these materials. This study investigates the behavior of the tyrosine derived polyarylates under in vitro conditions. The change of structure caused by …
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'Sustainability as a Design Tool' A Sustainable Biology and Chemistry Teaching Laboratory for Georgetown University in Washington D.C. 'Inform[ation]al Backbone'
Like much of the world, the United States is currently experiencing intense growth, especially in and around its cities. Unfortunately, this growth is often at odds with the natural environment. In order to reduce the demand of foreign energy resources designing with "green" or ecologically …
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The synthesis and in vitro evaluation of siRNAs modified at the backbone with a novel triazole-based internucleotide linkage and abasic alkyl-chain linkages of varying length
… by the native structure of duplex RNA′s charged backbone. This study therefore focused on synthesizing novel and neutrally-charged triazole-linked nucleoside dimer analogs which were incorporated throughout siRNA duplexes using DMTphosphoramidite chemistry, in order to attenuate the negative …
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