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 119 for “"System complexity"”.
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Effects of system complexity on protein aggregation in neurodegeneration
… thesis I will follow a bottom-up (biophysics to systems biology) approach in dealing with the influence of systemic complexity in protein aggregation across different components of cellular homoeostasis, in particular lipid membranes and the proteostasis network. In the first chapter of the …
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A Canonical Experiment on System Complexity Metric and Its Impact on Engineering Management
Systems are constantly increasing complexity. Being able to quantify the system complexity and how it relates to human effort and cognition can bring numerous benefits for product development and project management. In this thesis, 25 people were part of an experiment using the travel salesperson …
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A system complexity approach for the integration of product development and production system design
Complexity is generally believed to be one of the main causes of present difficulties in plant design and control. The complexity of a manufacturing system cannot be viewed without considering the products produced in the system. Lack of understanding in this relationship may lead to difficulties …
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Application of Functional Safety Standards to the Electrification of a Vehicle Powertrain
… electronic control units to automotive vehicles, system complexity has increased. With this change in complexity, new standards have been created to ensure safety at the system level for these vehicles. Furthermore, vehicles have become increasingly complex with the push for electrification of …
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QUANTITATIVE SAFETY ASSESSMENT OF AIR TRAFFIC CONTROL SYSTEMS THROUGH SYSTEM CONTROL CAPACITY
… of developmental changes in safety critical systems like the Air Traffic Control (ATC) systems. Effectiveness of the assessments is particularly desirable today in the safe implementations of revolutionary ATC overhauls like NextGen and SESAR. QSA of ATC systems are however challenged by …
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Low-power discrete Fourier transform and soft-decision Viterbi decoder for OFDM receivers
… with an enhanced performance by relieving the system complexity and performance degradation imposed by a quantization process. With an overwhelming demand for more reliable communication systems, the complexity required for modern communication systems has been increased accordingly. A …
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Transmit antenna selection in fading wireless communication systems
… with multiple-input multiple-output (MIMO) systems, we propose the use of the transmit antenna selection technique. In transmit antenna selection, the best performing antenna(s) is selected from all the available transmit antennas for transmission. Transmit antenna selection reduces the …
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Electromagnetic Steering of Sodium-Seeded Rocket Thrust Plumes: Design & Analysis
… vehicles or satellites where minimizing overall system complexity is benefited by eliminating otherwise separate attitude control systems.
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Rewriting-based symbolic methods for distributed system verification
As computer system complexity increases, new methods and logics are needed to scale up to the complexity of practical systems without sacrificing logical precision and ease of specification. To that end, the goal of this research project is to develop rewriting-based symbolic analysis methods that …
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Enabling automatic generation of accurate kinetic models for complicated chemical systems
… modelers to study even more complex chemical systems. As one can expect, the system complexity significantly increases modeling cost in both reaction mechanism construction and simulation. Over the years we have seen formulation of various lumping strategies.
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Database partitioning strategies for social network data
… avoiding decreased write performance or reduced system throughput when compared to the default hash partitioning approach. The strategies presented were evaluated using synthetic workloads of my own design as well as real workloads provided by Twitter, and show promising improvements in latency …
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Closed loop supply chain waste reduction through predictive modelling and process analysis
… levels, shipping costs, on-time delivery, and system complexity. Although the majority of shipments are successfully activated in the customer's home, a non-trivial percentage results in unused returns or inventory shrinkage. These undesirable results represent a significant amount of wasted …
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Design and Test of an Automotive Clutch Actuation
This thesis builds on the analysis of a automatic system for automotive automatic clutches. In this field of study there are some constraint to take into account and through them it is possible to find the best technological solution. The system under consideration is characterized as …
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Spatial dynamics of microbial populations driven by social interactions and horizontal gene transfer
The functions of the microbial ecosystems are closely related to the spatial structures formed by microbial communities. Yet, it is not well understood what determines, controls and regulates the spatial dynamics of microbial populations. In this study, we use synthetic microbial consortia as our …
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Design and control of an high maneuverability remotely operated vehicle with multi-degree of freedom thrusters
… of added mass and gyroscopic effects. This system is compared against a traditional fixed-thruster system in terms of cost, size, weight, and high/low speed performance. Preliminary results indicate that the actuated system can provide an improved thrust-to-mass metric at the expense of …
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Does root complexity affect the response of maize (Zea mays spp. mays) to abiotic stresses?
… water acquisition, it is obvious that the root system of the maize plant is essential. Given the importance of the root system in plant performance, it is intuitive that differences in root characteristics would impact the performance of maize under water and nutrient limited conditions. Despite …
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Fully Integrated Data and Power Transfer Systems with Galvanic Isolation
… the design of galvanically isolated integrated systems as a part of a research project at the RF ADC by exploiting STMicroelectronics technology platforms providing on chip galvanic isolation. This technology was previously addressed to the implementation of isolated data transfer and it is …
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Internal resistance variances in lithium-ion batteries and implications in manufacturing
… monitored in order to reduce battery management system complexity.
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Automating the construction of a complier heuristics using machine learning
… resource constraints. Compiler writers deal with system complexity by dividing the problem into multiple phases and devising approximate heuristics for each phase. However, to achieve satisfactory performance, developers are forced to manually tweak their heuristics with trial-and-error …
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Modelling, control and monitoring of high redundancy actuation
… improvements, meeting the requirements of the system under the vast majority of theoretically tolerable fault scenarios. However, these improvements are made at the cost of increased system complexity and a reliance on fault detection. Fault Detection (FD) and health monitoring of the HRA is …
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