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University of Ottawa
1.
Tun, Yarzar.
Nonmodal Analysis of Temporal Transverse Shear Instabilities in Shallow Flows
.
Degree: 2017, University of Ottawa
URL: http://hdl.handle.net/10393/36886 
► Shallow flows are those whose width is significantly larger than their depth. In these types of flows, two dimensional coherent structures can be generated and…
(more)
▼ Shallow flows are those whose width is significantly larger than their depth. In these types of flows, two dimensional coherent structures can be generated and can influence the flow greatly by the lateral transfer of mass and momentum. The development of coherent structures as a result of flow instabilities has been a topic of interest for environmental fluid mechanics for decades. Studies on the use of linear modal stability analysis is commonly found in literature. However, the relatively recent development in the field of hydrodynamic stability suggests that the traditional linear modal stability analysis does not describe the behaviour of the perturbations in finite time. The discrepancy between asymptotic behaviour and finite time behaviour is particularly large in shear driven flows and it is most likely to be the case for shallow flows. This study aims to provide a better understanding of finite time growth of perturbation energy in shallow flows. The three cases of shallow flows evaluated are the mixing layer, jet and wake. The critical cases are obtained through the linear modal analysis and nonmodal analysis was conducted to show the transient behaviour in finite time for what is so-called marginally stable. Finally, the thesis concludes by generalizing the finite time energy growth in the S-k space.
Subjects/Keywords: Shallow flows;
Hydrodynamic stability;
Linear stability analysis;
Nonmodal stability analysis;
Pseudospectra
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APA (6th Edition):
Tun, Y. (2017). Nonmodal Analysis of Temporal Transverse Shear Instabilities in Shallow Flows
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/36886
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tun, Yarzar. “Nonmodal Analysis of Temporal Transverse Shear Instabilities in Shallow Flows
.” 2017. Thesis, University of Ottawa. Accessed February 25, 2020.
http://hdl.handle.net/10393/36886.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tun, Yarzar. “Nonmodal Analysis of Temporal Transverse Shear Instabilities in Shallow Flows
.” 2017. Web. 25 Feb 2020.
Vancouver:
Tun Y. Nonmodal Analysis of Temporal Transverse Shear Instabilities in Shallow Flows
. [Internet] [Thesis]. University of Ottawa; 2017. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/10393/36886.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tun Y. Nonmodal Analysis of Temporal Transverse Shear Instabilities in Shallow Flows
. [Thesis]. University of Ottawa; 2017. Available from: http://hdl.handle.net/10393/36886
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
2.
Magedanz, Jeffrey William.
DEVELOPMENT OF MODEL OF OSKARSHAMN-2 REACTOR FOR ASSESSMENT
OF TRACE/PARCS FOR BOILING WATER REACTOR STABILITY ANALYSIS.
Degree: MS, Nuclear Engineering, 2010, Penn State University
URL: https://etda.libraries.psu.edu/catalog/10782
► Computer simulation of the behavior of nuclear reactors is an important part of their design, regulation, and operation. A phonomenon that is the subject of…
(more)
▼ Computer simulation of the behavior of nuclear
reactors is an important part of their design, regulation, and
operation. A phonomenon that is the subject of ongoing study with
computer simulation is the stability of boiling water reactors,
which can undergo events in which the power level oscillates,
including some occasions in which the oscillations can grow,
forcing a scram. TRACE is a thermal-hydraulics code developed by
the U.S. Nuclear Regulatory Comission. PARCS is a reactor
neutronics code developed at Purdue University. A combination of
the two codes is currently being validated for boiling water
reactor stability. Earlier work has been done with the Ringhals I
benchmark. Currently, a model is being developed to validate
TRACE/PARCS for an instability event that occurred in Sweden’s
Oskarshamn II reactor. Several sensitivity analyses were conducted,
testing the dependence of the key stability parameters on
nodalization, time step size, and other aspects of the model.
Several imporant dependencies are shown, and suggestions are made
for future sensitivity studies and improvement of the
model.
Subjects/Keywords: boiling water reactor; stability analysis
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APA (6th Edition):
Magedanz, J. W. (2010). DEVELOPMENT OF MODEL OF OSKARSHAMN-2 REACTOR FOR ASSESSMENT
OF TRACE/PARCS FOR BOILING WATER REACTOR STABILITY ANALYSIS. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10782
Chicago Manual of Style (16th Edition):
Magedanz, Jeffrey William. “DEVELOPMENT OF MODEL OF OSKARSHAMN-2 REACTOR FOR ASSESSMENT
OF TRACE/PARCS FOR BOILING WATER REACTOR STABILITY ANALYSIS.” 2010. Masters Thesis, Penn State University. Accessed February 25, 2020.
https://etda.libraries.psu.edu/catalog/10782.
MLA Handbook (7th Edition):
Magedanz, Jeffrey William. “DEVELOPMENT OF MODEL OF OSKARSHAMN-2 REACTOR FOR ASSESSMENT
OF TRACE/PARCS FOR BOILING WATER REACTOR STABILITY ANALYSIS.” 2010. Web. 25 Feb 2020.
Vancouver:
Magedanz JW. DEVELOPMENT OF MODEL OF OSKARSHAMN-2 REACTOR FOR ASSESSMENT
OF TRACE/PARCS FOR BOILING WATER REACTOR STABILITY ANALYSIS. [Internet] [Masters thesis]. Penn State University; 2010. [cited 2020 Feb 25].
Available from: https://etda.libraries.psu.edu/catalog/10782.
Council of Science Editors:
Magedanz JW. DEVELOPMENT OF MODEL OF OSKARSHAMN-2 REACTOR FOR ASSESSMENT
OF TRACE/PARCS FOR BOILING WATER REACTOR STABILITY ANALYSIS. [Masters Thesis]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/10782
Rutgers University
3.
Herdade, Simao, 1984-.
Stability results in additive combinatorics and graph theory.
Degree: PhD, Mathematics, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/47413/
► A general problem in Extremal Combinatorics asks about the maximum size of a collection of finite objects satisfying certain restrictions, and an ideal solution to…
(more)
▼ A general problem in Extremal Combinatorics asks about the maximum size of a collection of finite objects satisfying certain restrictions, and an ideal solution to it presents to you the objects which attain the maximum size. In several problems, it is the case that any large set satisfying the given property must be similar to one of the few extremal examples. Such stability results give us a complete understanding of the problem, and also make the result more flexible to be applied as a tool in other mathematical problems. Stability results in additive combinatorics and graph theory constitute the main topic of this thesis, in which we solve a question of Erdös and Sarközy on sums of integers, and reprove a conjecture of Posa and Seymour on powers of hamiltonian cycles. Along the way we prove stronger structural statements that have as a corollary the optimal solution to these problems. We also introduce a counting technique and two graph theory tools which we believe to be of great interest in their own right. Namely the Shifting Method, the Connecting Lemma, and a robust version of the classic Erdos-Stone Simonovits theorem.
Advisors/Committee Members: Szemerédi, Endre (chair), Komlós, János (internal member), Steiger, William (internal member), Magyar, Ákos (outside member).
Subjects/Keywords: Combinatorial analysis; Stability; Graph theory
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APA (6th Edition):
Herdade, Simao, 1. (2015). Stability results in additive combinatorics and graph theory. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/47413/
Chicago Manual of Style (16th Edition):
Herdade, Simao, 1984-. “Stability results in additive combinatorics and graph theory.” 2015. Doctoral Dissertation, Rutgers University. Accessed February 25, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/47413/.
MLA Handbook (7th Edition):
Herdade, Simao, 1984-. “Stability results in additive combinatorics and graph theory.” 2015. Web. 25 Feb 2020.
Vancouver:
Herdade, Simao 1. Stability results in additive combinatorics and graph theory. [Internet] [Doctoral dissertation]. Rutgers University; 2015. [cited 2020 Feb 25].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47413/.
Council of Science Editors:
Herdade, Simao 1. Stability results in additive combinatorics and graph theory. [Doctoral Dissertation]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47413/
4.
Peters, Andrés A.
Stability and String Stability Analysis of Formation Control Architectures for Platooning.
Degree: 2015, RIAN
URL: http://eprints.maynoothuniversity.ie/6521/
► This thesis presents theoretical results for stability and string stability of formation control architectures for platooning. We consider three important interconnection topologies for vehicles travelling…
(more)
▼ This thesis presents theoretical results for stability and string stability
of formation control architectures for platooning. We consider
three important interconnection topologies for vehicles travelling in a
straight line as a string: leader following, cyclic and bidirectional.
For the leader following topology we discuss modifications that allow
reduced coordination requirements. In the first case we consider
the use of the leader velocity as the state to be broadcast to the followers,
rather than the standard use of the leader position. This selection
yields a formation control architecture that achieves string stability
even under time delays in the state broadcast, while reducing typical
coordination requirements of leader following architectures. For the
second modification we change the way in which the leader position
is sent across the string to every follower. This technique keeps some
of the good transient properties of the standard leader following architecture
but eliminates most of the coordination requirements for
the followers. However, we show that this technique does not provide
string stability when time delays are present in the communication.
The second topology that we discuss is a cyclic one, where the first
member of the platoon is forced to track the last one. We discuss two
strategies: one where the inter-vehicle spacings may follow a constanttime
headway spacing policy and one where an independent leader
broadcasts its position to every member of a cyclic platoon. For both
strategies we obtain closed form expressions for the transfer functions
from disturbances to inter-vehicle spacings. These expressions allow
us to show that if the design parameters are not properly chosen, the
vehicle platoon may become unstable when the string size is greater
than a critical number. On the contrary, if the design parameters are
well chosen, both architectures can be made stable and string stable
for any size of the platoon.
The final topology that we consider is bidirectional, where every
member of the platoon, with the exception of the first and last, use
measurements of the two nearest neighbours to control their position
within the string. Although the derivations are more complex than
in the two previous unidirectional cases, we obtain closed form epressions for the dynamics of the platoon. These expressions are in
the form of simple transfer functions from disturbances to vehicles.
They allow us to obtain stability results for any size of the platoon
and understand the behaviour of the least stable pole location as the
string size increases.
All of the results obtained are illustrated by numerical examples
and ad-hoc simulations.
Subjects/Keywords: Stability Analysis; String Stability Analysis; Formation Control Architectures; Platooning
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APA (6th Edition):
Peters, A. A. (2015). Stability and String Stability Analysis of Formation Control Architectures for Platooning. (Thesis). RIAN. Retrieved from http://eprints.maynoothuniversity.ie/6521/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Peters, Andrés A. “Stability and String Stability Analysis of Formation Control Architectures for Platooning.” 2015. Thesis, RIAN. Accessed February 25, 2020.
http://eprints.maynoothuniversity.ie/6521/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Peters, Andrés A. “Stability and String Stability Analysis of Formation Control Architectures for Platooning.” 2015. Web. 25 Feb 2020.
Vancouver:
Peters AA. Stability and String Stability Analysis of Formation Control Architectures for Platooning. [Internet] [Thesis]. RIAN; 2015. [cited 2020 Feb 25].
Available from: http://eprints.maynoothuniversity.ie/6521/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Peters AA. Stability and String Stability Analysis of Formation Control Architectures for Platooning. [Thesis]. RIAN; 2015. Available from: http://eprints.maynoothuniversity.ie/6521/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
5.
Men, Kun.
Long term voltage stability analysis for small disturbances.
Degree: 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2499
► This dissertation attempts to establish an analytical and comprehensive framework to deal with two critical challenges associated with voltage stability analysis: 1. To study the…
(more)
▼ This dissertation attempts to establish an analytical and comprehensive framework to deal
with two critical challenges associated with voltage
stability analysis:
1. To study the new competitive environment appropriately and give more incentive
for reactive power supports, one has to evaluate the impacts of distributed market
forces on voltage
stability, which complicates the voltage
stability analysis.
2. Accurately estimating voltage
stability margin online is always the goal of the
industry. Industry used to apply static
analysis for its computation speed at the
cost of losing accuracy. On the other hand, dynamic
analysis can result in more
accurate estimation, but generally has a huge computation cost. So a challenge is
to estimate the voltage
stability margin accurately and efficiently at a reasonable
cost, especially for large system.
Considering the first challenge, this dissertation applied eigenvalue based bifurcation
analysis to allocate the contribution of voltage
stability. We investigate how parameters of
the system influence the bifurcations. Three bifurcations (singularity induced bifurcation,
saddle-node and Hopf bifurcation) and their relationship to several commonly used
controllers are analyzed. Their parameters? impact on these bifurcations have been
investigated, from which we found a way to allocate the contribution by analyzing the
relative positions of the bifurcations.
For the second challenge, a new fast numerical scheme is developed to estimate voltage
stability margin by intelligently adjusting the load increase ratio. A criterion, named EMD
(Equilibrium Manifold Deviation) criterion, is proposed to gauge the accuracy of the estimation. And based on this criterion, a new computation scheme is proposed. The
validity of our new approach is proven based on the well-known Runge-Kutta-Fehlberg
method, and can be extended to other explicit single-step methods easily. Numerical tests
demonstrate that the new approach is very practical and has great potential for industrial
applications.
This dissertation extends our new numerical scheme to stiff systems. When a system is
ill-conditioned, the implicit method would be applied to achieve numerical
stability. We
further demonstrate the validity to combine the intelligent load adjustment technique with
the implicit method to save the computation cost without loss of accuracy. This dissertation
also delves into the auto detection of stiffness of the power system, and extends our new
numerical scheme to general sytems.
Advisors/Committee Members: Huang, Garng M. (advisor), Li, Du (committee member), Shi, Weiping (committee member), Singh, Chana (committee member).
Subjects/Keywords: power system; voltage stability; small disturbance analysis; stability margin; numerical simulation
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APA (6th Edition):
Men, K. (2009). Long term voltage stability analysis for small disturbances. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2499
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Men, Kun. “Long term voltage stability analysis for small disturbances.” 2009. Thesis, Texas A&M University. Accessed February 25, 2020.
http://hdl.handle.net/1969.1/ETD-TAMU-2499.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Men, Kun. “Long term voltage stability analysis for small disturbances.” 2009. Web. 25 Feb 2020.
Vancouver:
Men K. Long term voltage stability analysis for small disturbances. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2499.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Men K. Long term voltage stability analysis for small disturbances. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2499
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
6.
Huang, Zhejun.
Mathematical analysis of combustion waves in competitive exothermic reactions.
Degree: Physical, Environmental & Mathematical Sciences, 2017, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/59003
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48232/SOURCE02?view=true
► In this thesis, we investigate the properties and linear stability of homogeneous premixed planar propagating combustion waves in one spatial dimension. In particular, we investigate…
(more)
▼ In this thesis, we investigate the properties and linear
stability of homogeneous premixed planar propagating combustion waves in one spatial dimension. In particular, we investigate travelling premixed combustion waves in a diffusional-thermal model with a two-step competitive exothermic reaction mechanism in which both reactions are exothermic and the same reactive material provides the feed for both exothermic reactive steps. Such reactions have direct relevance to the combustion of MeCH₂, where Me is either titanium or zirconium. Combustion waves in two-step competitive exothermic-reaction schemes are investigated for various fuel types, includinggaseous, porous and solid fuels, under both adiabatic and nonadiabatic conditions. In addition, the Evans Function Method is employed to analyze the linear
stability of the combustion waves. The purpose of the study is to investigate how the properties of the combustion waves vary as various parameter values change. Of particular interest are those parameters describing the ratios of the activation energies, pre-exponential factors and enthalpies of the two reactions, the Lewis number of the reactants, the heat-loss parameter and ambient temperature. As well as the transitions from stable to unstable planar wave solutions, various bifurcations are analyzed.The properties and linear
stability of the travelling-wave solutions from two-step competitive exothermic reactions are more complicated that those from single-step exothermic reaction; in particular, regions of bi-
stability exist: different solutions coexist for the same parameter values. When bi-
stability does not exist, the behaviour of the combustion waves is similar to that from the single-step reaction. When bistability does exist, two stable branches, a fast branch with fast flame speeds and a slow branch with slow flame speeds, can co-exist. The transitions between the fast and slow branches are observed by altering the fuel temperature profiles. The steady travelling waves become unstable due to the existence of Hopf bifurcations and there are three possible scenarios. The conditions of the existence of bi-
stability are discussed.
Advisors/Committee Members: Sidhu, Harvinder, Physical, Environmental & Mathematical Sciences, UNSW Canberra, UNSW, Jovanoski, Zlatko, Physical, Environmental & Mathematical Sciences, UNSW Canberra, UNSW, Towers, Isaac, Physical, Environmental & Mathematical Sciences, UNSW Canberra, UNSW.
Subjects/Keywords: Bi-stability; Combustion waves; Competitive exothermic reactions; Linear stability analysis
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APA (6th Edition):
Huang, Z. (2017). Mathematical analysis of combustion waves in competitive exothermic reactions. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/59003 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48232/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Huang, Zhejun. “Mathematical analysis of combustion waves in competitive exothermic reactions.” 2017. Doctoral Dissertation, University of New South Wales. Accessed February 25, 2020.
http://handle.unsw.edu.au/1959.4/59003 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48232/SOURCE02?view=true.
MLA Handbook (7th Edition):
Huang, Zhejun. “Mathematical analysis of combustion waves in competitive exothermic reactions.” 2017. Web. 25 Feb 2020.
Vancouver:
Huang Z. Mathematical analysis of combustion waves in competitive exothermic reactions. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2020 Feb 25].
Available from: http://handle.unsw.edu.au/1959.4/59003 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48232/SOURCE02?view=true.
Council of Science Editors:
Huang Z. Mathematical analysis of combustion waves in competitive exothermic reactions. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/59003 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:48232/SOURCE02?view=true
Virginia Tech
7.
Krishnan, Anaga.
Robustness and Stability Analysis with a Heavily-Meshed Distribution Network.
Degree: MS, Electrical Engineering, 2019, Virginia Tech
URL: http://hdl.handle.net/10919/89905
► Distribution systems carry electricity from the transmission system and deliver it to the customers. Distribution systems mainly operate using two topologies for their feeders: Radial…
(more)
▼ Distribution systems carry electricity from the transmission system and deliver it to the customers. Distribution systems mainly operate using two topologies for their feeders: Radial and Meshed. The majority of customers are served using radial distribution systems, as in the radial feeders power flows in one direction (i.e. from substation to the end-user). They are simple in design and operation and are constructed at a moderate cost. However, if there is a fault along the main feeder, there will be an interruption of power to the end-use customer. On the other hand, meshed distribution systems involve multiple paths of power flow between all the points in the network. If a fault occurs along the feeder, the power flow is rerouted to the other available paths. Thus, Heavily Due to their complex topology, meshed systems are expensive to construct and deploy. The power flow
analysis of these systems poses many challenges. Because of these reasons, their use is mainly restricted to urban areas with high load density which require very high reliability. The future grid is becoming increasingly complex and evolving to a meshed distribution topology has its own advantages. However, as presently the use of meshed systems is sparse, the work done on evaluating the
stability of these systems is minimal. As a result of which, this thesis focuses on determining the optimal power flow solvers for these complex systems, analyzing their
stability under abnormal operating conditions, and suggesting methods to reinforce the vulnerabilities in the system.
Advisors/Committee Members: Broadwater, Robert P. (committeechair), Centeno, Virgilio A. (committee member), De La Reelopez, Jaime (committee member).
Subjects/Keywords: Power Distribution System; Meshed Distribution System; Voltage Stability Analysis; Stability Margin.
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APA (6th Edition):
Krishnan, A. (2019). Robustness and Stability Analysis with a Heavily-Meshed Distribution Network. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/89905
Chicago Manual of Style (16th Edition):
Krishnan, Anaga. “Robustness and Stability Analysis with a Heavily-Meshed Distribution Network.” 2019. Masters Thesis, Virginia Tech. Accessed February 25, 2020.
http://hdl.handle.net/10919/89905.
MLA Handbook (7th Edition):
Krishnan, Anaga. “Robustness and Stability Analysis with a Heavily-Meshed Distribution Network.” 2019. Web. 25 Feb 2020.
Vancouver:
Krishnan A. Robustness and Stability Analysis with a Heavily-Meshed Distribution Network. [Internet] [Masters thesis]. Virginia Tech; 2019. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/10919/89905.
Council of Science Editors:
Krishnan A. Robustness and Stability Analysis with a Heavily-Meshed Distribution Network. [Masters Thesis]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/89905
University of Hawaii – Manoa
8.
Wahl, Thomas Patrick.
Principal component analysis of the balance error scoring system in concussed and halthy high school athletes.
Degree: 2016, University of Hawaii – Manoa
URL: http://hdl.handle.net/10125/101204
► M.S. University of Hawaii at Manoa 2012.
Objective: Neuropsychological and postural stability testing have become mandated facets of high school concussion management protocols. The Balance…
(more)
▼ M.S. University of Hawaii at Manoa 2012.
Objective: Neuropsychological and postural stability testing have become mandated facets of high school concussion management protocols. The Balance Error Scoring System (BESS) is the most cost-effective and quickest objective measure of postural stability. However, previous research has demonstrated individual conditions of the BESS to be unreliable,' excessive'0'11'2 and prone to inaccuracies.12"3 It may be possible to utilize fewer stances while maintaining the integrity of its measures. Our purpose was to examine the score difference, from baseline to post test, for each condition of the BESS over the course of concussion recovery through principal component analysis.
Design and Setting: Three groups of BESS data were utilized for interpretation and cross-validation. Experimental group had baseline assessment, concussion diagnosed by their athletic trainer (AT), and post-assessments on days 1, 3, 5, 7 scored by the investigator. The clinical group had baselines and days 1 and 3, administered by participants' AT. Baseline group had only baseline assessments scored by the investigator and an additional AT.
Participants: We studied 13 high school athletes in the experimental group, 22 athletes in the clinical group, and 2,811 athletes in the baseline group.
Measurements: We assessed postural stability using the Balance Error Scoring System.
Results: Double leg firm and foam surfaces failed to meaningfully contribute to assessment of postural stability deficits. Single leg and tandem firm stances were important contributors throughout concussion recovery in the experimental and baseline groups, resulting in the composition of one principal component accounting for 64-71% of the total variance.
Conclusion: Double leg firm and foam stances do not aid in the interpretation of postural stability deficits when utilizing the BESS.
Subjects/Keywords: concussion; balance assessment; postural stability; factor analysis
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APA (6th Edition):
Wahl, T. P. (2016). Principal component analysis of the balance error scoring system in concussed and halthy high school athletes. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/101204
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wahl, Thomas Patrick. “Principal component analysis of the balance error scoring system in concussed and halthy high school athletes.” 2016. Thesis, University of Hawaii – Manoa. Accessed February 25, 2020.
http://hdl.handle.net/10125/101204.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wahl, Thomas Patrick. “Principal component analysis of the balance error scoring system in concussed and halthy high school athletes.” 2016. Web. 25 Feb 2020.
Vancouver:
Wahl TP. Principal component analysis of the balance error scoring system in concussed and halthy high school athletes. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/10125/101204.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wahl TP. Principal component analysis of the balance error scoring system in concussed and halthy high school athletes. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/101204
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Hong Kong
9.
Cui, Yukang.
Stability and positivity analysis of singular systems
with time-varying delays.
Degree: PhD, 2017, University of Hong Kong
URL: http://hdl.handle.net/10722/240655
► This dissertation is dedicated to the problems of stability and positivity for singular systems with time-varying delays. Standard singular system and positive singular system are…
(more)
▼ This dissertation is dedicated to the problems of
stability and positivity for singular systems with time-varying
delays. Standard singular system and positive singular system are
both considered.
For a singular system with time-varying delays,
the characterizations of robust admissibility and admissibilization
are established for discrete-time cases. It is demonstrated that
the time-varying delay can be estimated by an appropriate
comparison model in order to tackle the uncertainty of the delay.
An improved admissibility condition in terms of linear matrix
inequality is proposed by means of a transformed system, which
guarantees a singular system with time-varying delays to be
admissible. Then, the problem of robust admissibilization is
further investigated for the uncertain singular time-delay system.
Moreover, an iterative linear matrix inequality algorithm is
developed for obtaining a state-feedback controller.
For
positive singular systems with time-varying delays, the problems of
positivity, stability and performance are studied. It is proved
that a singular system can be equivalently transformed to an
augmented system which is more intuitive for positivity analysis by
using the Drazin inverse. For a discrete-time singular system with
time-varying delays, a necessary and sufficient positivity
condition is proposed by the property of positive invariance. A
stability condition for the constant time-delay case is further
investigated by linear co-positive Lyapnunov functionals and is
extended to the time-varying delay case by exploring the relation
between systems with constant delay and time-varying one. For
continuous-time singular systems with time-varying delays, a
positivity condition is derived by considering an auxiliary system
with certain initial conditions. It is shown that the solution of a
stable positive singular system with constant delay is
monotonically nonincreasing with some initial conditions. By
comparing the trajectory of a time-varying delay system with that
of a constant time-delay system, the asymptotic stability condition
is established for positive singular systems with time-varying
delays. Furthermore, the characterizations of ℓ_∞-gain
and L_∞-gain are presented for both discrete-time and
continuous-time positive singular systems with time-varying delays
after their positivity is analyzed. It is shown that they are
determined by the system matrices and independent of the magnitude
of delays under certain assumptions.
publishedorfinalversion
Mechanical Engineering
Doctoral
Doctor of Philosophy
Subjects/Keywords: System analysis; Time delay systems; Stability
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APA (6th Edition):
Cui, Y. (2017). Stability and positivity analysis of singular systems
with time-varying delays. (Doctoral Dissertation). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/240655
Chicago Manual of Style (16th Edition):
Cui, Yukang. “Stability and positivity analysis of singular systems
with time-varying delays.” 2017. Doctoral Dissertation, University of Hong Kong. Accessed February 25, 2020.
http://hdl.handle.net/10722/240655.
MLA Handbook (7th Edition):
Cui, Yukang. “Stability and positivity analysis of singular systems
with time-varying delays.” 2017. Web. 25 Feb 2020.
Vancouver:
Cui Y. Stability and positivity analysis of singular systems
with time-varying delays. [Internet] [Doctoral dissertation]. University of Hong Kong; 2017. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/10722/240655.
Council of Science Editors:
Cui Y. Stability and positivity analysis of singular systems
with time-varying delays. [Doctoral Dissertation]. University of Hong Kong; 2017. Available from: http://hdl.handle.net/10722/240655
University of Georgia
10.
Dewan, Akul.
Predicting protein stability change upon single point mutation using multi-instance regression: a local conformational analysis approach.
Degree: MS, Artificial Intelligence, 2014, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/dewan_akul_201412_ms
► The prediction of stability change caused by a mutation in a protein structure is of vital importance for protein design and analysis. Several attempts have…
(more)
▼ The prediction of
stability change caused by a mutation in a protein structure is of vital importance for protein design and
analysis. Several attempts have been made to predict these energy changes by analyzing the global conformational properties of a structure. To date, none of the research has focused solely on studying the effect of local conformational properties of a mutated residue to the final
stability change. In my thesis I use multi-instance regression learning with output aggregation to learn and predict the energy change using the information from the local environment of the mutated residue. This research shows a high degree of correlation between the expected and predicted values of energy changes and a quantum leap from the current state-of-the-art.
Advisors/Committee Members: Khaled Rasheed.
Subjects/Keywords: machine learning; protein stability; conformational analysis
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dewan, A. (2014). Predicting protein stability change upon single point mutation using multi-instance regression: a local conformational analysis approach. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/dewan_akul_201412_ms
Chicago Manual of Style (16th Edition):
Dewan, Akul. “Predicting protein stability change upon single point mutation using multi-instance regression: a local conformational analysis approach.” 2014. Masters Thesis, University of Georgia. Accessed February 25, 2020.
http://purl.galileo.usg.edu/uga_etd/dewan_akul_201412_ms.
MLA Handbook (7th Edition):
Dewan, Akul. “Predicting protein stability change upon single point mutation using multi-instance regression: a local conformational analysis approach.” 2014. Web. 25 Feb 2020.
Vancouver:
Dewan A. Predicting protein stability change upon single point mutation using multi-instance regression: a local conformational analysis approach. [Internet] [Masters thesis]. University of Georgia; 2014. [cited 2020 Feb 25].
Available from: http://purl.galileo.usg.edu/uga_etd/dewan_akul_201412_ms.
Council of Science Editors:
Dewan A. Predicting protein stability change upon single point mutation using multi-instance regression: a local conformational analysis approach. [Masters Thesis]. University of Georgia; 2014. Available from: http://purl.galileo.usg.edu/uga_etd/dewan_akul_201412_ms
11.
Satheesh A.
Voltage stability analysis of facts controlled power
system using certain intelligent techniques;.
Degree: Voltage stability analysis of facts controlled power
system, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/17396
► Stability is the main aspect of all kinds of power system networks. newlineThere are different categories of stability in any power system: steady state newlinestability,…
(more)
▼ Stability is the main aspect of all kinds of power
system networks. newlineThere are different categories of stability
in any power system: steady state newlinestability, transient
stability, dynamic stability, voltage stability and frequency
newlinestability. In general each factor is taken into
consideration depending upon the newlineenvironment and situation.
In this research work, voltage stability is newlineconsidered to
recommend the utilities of Flexible Alternating Current
newlineTransmission System (FACTS) devices to achieve voltage
stability under newlinedisturbed conditions for a given power
system network. There are various newlineFACTS devices such as
Static Var Compensator (SVC), Static Synchronous newlineCompensator
(STATCOM), Thyristor Controlled Series Capacitor (TCSC),
newlineThyristor Controlled Phase Shifter (TCPS), Static
Synchronous Series newlineCompensator (SSSC) and Unified Power Flow
Controller (UPFC). With the newlinehelp of UPFC device, the voltage
stability investigation is dealt with and to newlinelocate the
device and minimize the loss, a certain intelligent approach is
used. newlineThey are; Artificial Neural Network (ANN) with Genetic
Algorithm (GA), newlineArtificial Neural Network (ANN) with
Particle Swarm Optimization (PSO) newlineand Artificial Neural
Network (ANN) with Bees Algorithm (BA). The load flow analysis is
carried out with Newton-Raphson method. newlineThe parameters of
UPFC are modelled into power flow equation and thus it is used to
determine the power injection in terms of voltage and power angle.
newlineThe ANN is used for identifying the optimal location for
fixing UPFC. The newlineGA, PSO and BA compute the amount of
voltage and angle to be injected. newlineThe proposed hybrid
methods are simulated using MATLAB. These newlineprocedures are
individually applied for the chosen power system network of
newlineeither 14 (or) 30 (or) 57 (or) 118 bus. The simulated
results are analysed and newlinepresented.
Advisors/Committee Members: Manigandan T.
Subjects/Keywords: Electrical engineering; Power system; Voltage stability analysis
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APA (6th Edition):
A, S. (2014). Voltage stability analysis of facts controlled power
system using certain intelligent techniques;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17396
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
A, Satheesh. “Voltage stability analysis of facts controlled power
system using certain intelligent techniques;.” 2014. Thesis, Anna University. Accessed February 25, 2020.
http://shodhganga.inflibnet.ac.in/handle/10603/17396.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
A, Satheesh. “Voltage stability analysis of facts controlled power
system using certain intelligent techniques;.” 2014. Web. 25 Feb 2020.
Vancouver:
A S. Voltage stability analysis of facts controlled power
system using certain intelligent techniques;. [Internet] [Thesis]. Anna University; 2014. [cited 2020 Feb 25].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17396.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
A S. Voltage stability analysis of facts controlled power
system using certain intelligent techniques;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17396
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ohio University
12.
Han, Xiao.
Shear Strength and Stability of Highway Embankments in
Ohio.
Degree: MS, Civil Engineering (Engineering and
Technology), 2010, Ohio University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1269457333
► One of the primary factors that control the stability of earthen embankments is the shear strength of embankment fill soils. Karl von Terzaghi and…
(more)
▼ One of the primary factors that control the
stability of earthen embankments is the shear strength of
embankment fill soils. Karl von Terzaghi and U.S. Navy found
empirical correlations between soil shear strength and lab or
in-situ soil test results. Subsequently, the Navy proposed typical
effective friction angle values for different soils types. However,
it is not certain if these correlations and standard values are
reliable for Ohio soils. The main objective of this thesis is to
establish reliable correlations between shear strength and index
properties/in-situ test measurements for embankment fill soils
existing in Ohio. Relatively undisturbed soil
samples were gathered from nine highway embankment sites spread
throughout Ohio. Tri-axial compression tests were performed to
determine the shear strength of these soil samples. During data
analysis, statistical methods, such as regression
analysis and
T-tests, were utilized to assess the correlations. Through the
statistical
analysis, optimized correlations were identified
between shear strength and other characteristics of soil have been
found. Once the optimum correlations were
established, soil shear strength properties were applied to
sophisticated geotechnical software to perform a series of slope
stability analysis for highway embankments. Lastly, results from
the laboratory testing, field testing, statistical data
analysis,
and slope
stability analysis were all combined to suggest technical
guidelines for highway embankment design/constructions in
Ohio.
Advisors/Committee Members: Masada, Teruhisa (Advisor).
Subjects/Keywords: Civil Engineering; embankment; regression analysis; soil stability
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Manager
APA (6th Edition):
Han, X. (2010). Shear Strength and Stability of Highway Embankments in
Ohio. (Masters Thesis). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1269457333
Chicago Manual of Style (16th Edition):
Han, Xiao. “Shear Strength and Stability of Highway Embankments in
Ohio.” 2010. Masters Thesis, Ohio University. Accessed February 25, 2020.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1269457333.
MLA Handbook (7th Edition):
Han, Xiao. “Shear Strength and Stability of Highway Embankments in
Ohio.” 2010. Web. 25 Feb 2020.
Vancouver:
Han X. Shear Strength and Stability of Highway Embankments in
Ohio. [Internet] [Masters thesis]. Ohio University; 2010. [cited 2020 Feb 25].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1269457333.
Council of Science Editors:
Han X. Shear Strength and Stability of Highway Embankments in
Ohio. [Masters Thesis]. Ohio University; 2010. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1269457333
13.
Gangrade, Rajat Mukesh.
Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake.
Degree: MS, Civil and Environmental Engineering, 2013, Virginia Tech
URL: http://hdl.handle.net/10919/23257
► On August 15, 2007, Pisco, Peru was hit by an earthquake of Magnitude (Mw) = 8.0 which triggered multiple liquefaction induced lateral spreads. The subduction…
(more)
▼ On August 15, 2007, Pisco, Peru was hit by an earthquake of Magnitude (Mw) = 8.0 which triggered multiple liquefaction induced lateral spreads. The subduction earthquake lasted for approximately 100 seconds and showed a complex rupture. From the geotechnical perspective, the Pisco earthquake was significant for the amount of soil liquefaction observed. A massive liquefaction induced seaward displacement of a marine terrace was observed in the Canchamana complex. Later
analysis using the pre- and post-earthquake images showed that the lateral displacements were concentrated only on some regions. Despite the lateral homogeneity of the marine terrace, some cross-sections showed large displacements while others had minimal displacements. The detailed documentation of this case-history makes it an ideal case-study for the determination of the undrained strength of the liquefied soils; hence, the main objective of this research is to use the extensive data from the Canchamana Slide to estimate the shear strength of the liquefied soils. In engineering practice, the undrained strength of liquefied soil is typically estimated by correlating SPT-N values to: 1) absolute value of residual strength, or 2) residual strength ratio. Our research aims to contribute an important data point that will add to the current understanding of the residual strength of liquefied soils.
Advisors/Committee Members: Rodriguez-Marek, Adrian (committeechair), Dove, Joseph E. (committee member), Green, Russell A. (committee member).
Subjects/Keywords: Lateral Spreading; Slope Stability Analysis; Bayesian Updating
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Gangrade, R. M. (2013). Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/23257
Chicago Manual of Style (16th Edition):
Gangrade, Rajat Mukesh. “Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake.” 2013. Masters Thesis, Virginia Tech. Accessed February 25, 2020.
http://hdl.handle.net/10919/23257.
MLA Handbook (7th Edition):
Gangrade, Rajat Mukesh. “Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake.” 2013. Web. 25 Feb 2020.
Vancouver:
Gangrade RM. Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake. [Internet] [Masters thesis]. Virginia Tech; 2013. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/10919/23257.
Council of Science Editors:
Gangrade RM. Analysis of a Lateral Spreading Case History from the 2007 Pisco, Peru Earthquake. [Masters Thesis]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/23257
Univerzitet u Beogradu
14.
Mitrović, Bojan M., 1982-.
Генетичка варијабилност и мултиваријациона анализа
важнијих агрономских особина популације кукуруза уске генетичке
основе.
Degree: Poljoprivredni fakultet, 2015, Univerzitet u Beogradu
URL: https://fedorabg.bg.ac.rs/fedora/get/o:9132/bdef:Content/get
► Пољопривреда - Agronomy
У раду је проучавана генетичка варијабилност важнијих агрономских особина две полусродничке популације кукуруза стандардним статистичким методама и методама мултиваријационе анализе. За проучавање…
(more)
▼ Пољопривреда - Agronomy
У раду је проучавана генетичка варијабилност
важнијих агрономских особина две полусродничке популације кукуруза
стандардним статистичким методама и методама мултиваријационе
анализе. За проучавање је одабрана популација кукуруза уске
генетичке основе НС2Б, чија су S2 потомства укрштена са сваким од
два међусобно, и у односу на популацију генетички несродна тестера
(очинске компоненте). Након укрштања добијене су две популације
полусродника са по 40 генотипова у свакој. Огледи су постављени по
моделу непотпуног блок дизајна са понављањима у оквиру сета у току
2009, 2010. и 2011. године на три локалитета; Римски Шанчеви,
Србобран и Бачки Петровац. Анализиране су све важније агрономске
особине. На основу добијених података израчунате су просечне
вредности, показатељи варијабилности, генетичке корелације. Посебна
пажња посвећена је анализи стабилности испитиваних генотипова,
односно утицају изабраног тестера на стабилност генотипова унутар
популације. За процену стабилности коришћена су два метода; метод
преко непараметријских показатеља стабилности добијених на основу
рангирања генотипова у спољашњим срединама и метод GGE биплот
анализе. Прва група потомства остварила је више просечне вредности
за већину испитиваних особина у односу на другу групу чиме је дата
предност првом тестеру (26НС) у односу на други (72НС) за даљи рад
са популацијом. Вредности показатеља варијабилности нису се
сигнификантно разликовале између потомства и биле су уобичајене за
полусроднички (HS) тип популације. Генетичке корелације између
приноса зрна и других агрономских особина углавном су биле слабе и
несигнификантне. Јаке сигнификантне позитивне корелације
установљене су између појединих агрономских особина код обе групе
потомства. Мултиваријационом методом Генотип-особина биплот анализе
установљене су корелације у великој мери сагласне са израчунатим
корелацијама преко одговарајућих варијанси и коваријанси. На основу
вредности непараметријских показатеља стабилности Si (1) и Si (2)
између прве и друге групе потомства нису установљене сигнификантне
разлике у стабилности. Обе методе за процену стабилности издвојиле
су сличне генотипове са становишта приноса и стабилности. Два
генотипа показали су се као најперспективнији за даљи наставак
селекције са било којим од два коришћена тестера што указује да се
у њима налази највећи број пожељних алела. Остали издвојени
генотипови се такође могу сматрати перспективним али у комбинацији
са њима одговарајућим тестером.
Advisors/Committee Members: Šurlan-Momirović, Gordana, 1949-.
Subjects/Keywords: maize; multivariate analysis; stability; grain
yield
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APA ·
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MLA ·
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to Zotero / EndNote / Reference
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APA (6th Edition):
Mitrović, Bojan M., 1. (2015). Генетичка варијабилност и мултиваријациона анализа
важнијих агрономских особина популације кукуруза уске генетичке
основе. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:9132/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mitrović, Bojan M., 1982-. “Генетичка варијабилност и мултиваријациона анализа
важнијих агрономских особина популације кукуруза уске генетичке
основе.” 2015. Thesis, Univerzitet u Beogradu. Accessed February 25, 2020.
https://fedorabg.bg.ac.rs/fedora/get/o:9132/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mitrović, Bojan M., 1982-. “Генетичка варијабилност и мултиваријациона анализа
важнијих агрономских особина популације кукуруза уске генетичке
основе.” 2015. Web. 25 Feb 2020.
Vancouver:
Mitrović, Bojan M. 1. Генетичка варијабилност и мултиваријациона анализа
важнијих агрономских особина популације кукуруза уске генетичке
основе. [Internet] [Thesis]. Univerzitet u Beogradu; 2015. [cited 2020 Feb 25].
Available from: https://fedorabg.bg.ac.rs/fedora/get/o:9132/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mitrović, Bojan M. 1. Генетичка варијабилност и мултиваријациона анализа
важнијих агрономских особина популације кукуруза уске генетичке
основе. [Thesis]. Univerzitet u Beogradu; 2015. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:9132/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Univerzitet u Beogradu
15.
Ivanjac, Filip, 1983-.
Merenje stabilnosti kraniofacijalnih implantata analizom
rezonantne frekvencije.
Degree: Stomatološki fakultet, 2016, Univerzitet u Beogradu
URL: https://fedorabg.bg.ac.rs/fedora/get/o:13327/bdef:Content/get
► Stomatologija - Maksilofacijalna hirurgija / Denistry - Maxillofacial surgery
Klinički je dokazano da stabilnost implantata igra značajnu ulogu u narednim terapijskim fazama i omogućava da…
(more)
▼ Stomatologija - Maksilofacijalna hirurgija /
Denistry - Maxillofacial surgery
Klinički je dokazano da stabilnost implantata igra
značajnu ulogu u narednim terapijskim fazama i omogućava da
predvidimo krajnji ishod rehabilitacije. Kako uspeh
implantatno-protetičkog zbrinjavanja često zavisi od biomehaničkih
faktora, podatak o stabilnosti implantata smanjuje rizik od
neuspeha. Istraţivanja stabilnosti implantata uglavnom se odnose na
oralne implantate. U maksilofacijalnoj hirurgiji za fiksiranje
kraniofacijalnih epiteza koriste se ekstraoralni implantati. Stoga
se ukazala potreba da se sprovede pilot studija u okviru koje bi se
izmerila stabilnost kraniofacijalnih implantata analizom rezonantne
frekvencije. Cilj ovog istraţivanja bila je procena stabilnosti
kraniofacijalnih implantata analizom rezonantne frekvencije u
korelaciji sa oseointegracijom u funkciji vremena, oblikom
implantata i njihovom lokalizacijom. Metodologija: Na osnovu mikro
CT metode odreĎena je gustina kosti na kadaveričnom modelu lobanje
radi utvrĎivanja optimalne lokalizacije mesta za ugradnju
kraniofacijalnih implantata. Istraţivanjem je obuhvaćeno 20
pacijenata od toga 11 sa orbitalnim, 5 sa nazalnim i 4 sa
aurikularnim (kontrolna grupa) defektima. Ukupno 50 EO implantata
je ugraĎeno. Korišćeni su implantati oblika diska - 38 (jednostruki
8, dvostruki 19 i trostruki disk 11). U kontrolnoj grupi bilo je
ugraĎenih 12 zavrtanj implantata prečnika 4.1 mm; 3.5 mm duţine.
Stabilnost je merena Ostell mentor® aparatom. Merenja su vršena tri
puta, neposredno po ugradnji implantata, nakon 3 meseca, kao i
nakon najmanje 6 meseci. Rezultati: Na osnovu analize rezonantne
frekvencije (RFA) značajno povećanje vrednosti implantatne
stabilnosti zabeleţeno je izmeĎu sva tri vremena merenja, kod svih
tipova implantata, osim kod trostrukih disk implantata izmeĎu 3. i
6. meseca, kao i kod zavrtanj implantata izmeĎu 0. i 3. meseca.
PoreĎenjem izmeĎu grupa implantati oblika zavrtnja pokazali su
statistički značajno više vrednosti stabilnosti u odnosu na disk
implantate. MeĎusobnim poreĎenjem disk implantata nije pronaĎena
statistički značajna razlika u stabilnosti izmeĎu jednostrukih,
dvostrukih i trostrukih disk implantata tokom vremena, osim u
trećem mesecu gde su trostruki disk implantati pokazali statistički
značajno više vrednosti u odnosu na jednostruke disk implantate.
Zaključak: Kod svih pacijenata implantatna stabilnost povećavala se
tokom vremena što potvrĎuje dobru oseointegraciju. Nakon 3 meseca 6
implantati su bili dovoljno stabilni za retenciju
epiteza...
Advisors/Committee Members: Konstantinović, Vitomir, 1961-.
Subjects/Keywords: craniofacial implants; implant stability; resonant
frequency analysis
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APA (6th Edition):
Ivanjac, Filip, 1. (2016). Merenje stabilnosti kraniofacijalnih implantata analizom
rezonantne frekvencije. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:13327/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ivanjac, Filip, 1983-. “Merenje stabilnosti kraniofacijalnih implantata analizom
rezonantne frekvencije.” 2016. Thesis, Univerzitet u Beogradu. Accessed February 25, 2020.
https://fedorabg.bg.ac.rs/fedora/get/o:13327/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ivanjac, Filip, 1983-. “Merenje stabilnosti kraniofacijalnih implantata analizom
rezonantne frekvencije.” 2016. Web. 25 Feb 2020.
Vancouver:
Ivanjac, Filip 1. Merenje stabilnosti kraniofacijalnih implantata analizom
rezonantne frekvencije. [Internet] [Thesis]. Univerzitet u Beogradu; 2016. [cited 2020 Feb 25].
Available from: https://fedorabg.bg.ac.rs/fedora/get/o:13327/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ivanjac, Filip 1. Merenje stabilnosti kraniofacijalnih implantata analizom
rezonantne frekvencije. [Thesis]. Univerzitet u Beogradu; 2016. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:13327/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
16.
Natella, M.
Coupled Nonlinear Aeroelasticity and Flight Dynamics for Stability Analysis of Flexible Wing Structures:.
Degree: 2015, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:39984220-1d55-43fb-b42c-8a692a979211
► The present work thus develops a low-fidelity formulation to investigate the flight dynamic stability of a flexible wing structure. The model is verified against other…
(more)
▼ The present work thus develops a low-fidelity formulation to investigate the flight dynamic
stability of a flexible wing structure. The model is verified against other studies found in the relevant literature, which show interesting trends in terms of how some of the design variables or flight conditions influence the
stability of the structure.
Advisors/Committee Members: De Breuker, R., Werter, N.P.M..
Subjects/Keywords: aeroelasticity; flight dynamics; flexible wings; stability analysis
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APA (6th Edition):
Natella, M. (2015). Coupled Nonlinear Aeroelasticity and Flight Dynamics for Stability Analysis of Flexible Wing Structures:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:39984220-1d55-43fb-b42c-8a692a979211
Chicago Manual of Style (16th Edition):
Natella, M. “Coupled Nonlinear Aeroelasticity and Flight Dynamics for Stability Analysis of Flexible Wing Structures:.” 2015. Masters Thesis, Delft University of Technology. Accessed February 25, 2020.
http://resolver.tudelft.nl/uuid:39984220-1d55-43fb-b42c-8a692a979211.
MLA Handbook (7th Edition):
Natella, M. “Coupled Nonlinear Aeroelasticity and Flight Dynamics for Stability Analysis of Flexible Wing Structures:.” 2015. Web. 25 Feb 2020.
Vancouver:
Natella M. Coupled Nonlinear Aeroelasticity and Flight Dynamics for Stability Analysis of Flexible Wing Structures:. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2020 Feb 25].
Available from: http://resolver.tudelft.nl/uuid:39984220-1d55-43fb-b42c-8a692a979211.
Council of Science Editors:
Natella M. Coupled Nonlinear Aeroelasticity and Flight Dynamics for Stability Analysis of Flexible Wing Structures:. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:39984220-1d55-43fb-b42c-8a692a979211
University of Wollongong
17.
Li, Boyuan.
Modelling, dynamic stability analysis and control of an omni-directional road vehicle.
Degree: Master of Engineering - Research, Faculty of Engineering, 2012, University of Wollongong
URL: ;
https://ro.uow.edu.au/theses/3602
► In a modern society, traffic congestion is a major problem in every metropolis. To solve the problem of traffic congestion an innovative omni-directional vehicle…
(more)
▼ In a modern society, traffic congestion is a major problem in every metropolis. To solve the problem of traffic congestion an innovative omni-directional vehicle is proposed. The most important advantage of an omni-directional vehicle is that by steering all four wheels it can turn in a small radius. This means that a smaller area is required for turning or parking. Lots of researches have focused on the use of an omni-directional vehicle for in-door situations, but less research has focussed on its use as an on road vehicle.
Therefore, this research has mainly focussed on developing the comprehensive vehicle dynamics model for an omni-directional road vehicle for high velocity conditions, transferring loads and the effect of traction and braking. This research consists of the following three parts:
A model was developed for an omni-directional vehicle that mainly focussed on vehicle dynamics in the yaw plane because the side slip angle and yaw rate are the two most important outputs of a dynamics system and determine its total stability. An innovative four wheel, independent steering system was incorporated into this vehicle dynamics model and the effect of roll motion on the yaw plane was examined.
Secondly, the stability of the vehicle in the yaw plane was analysed based on the response of the side slip angle, as first suggested. Then in the actual simulation, and based on the stability criterions, vehicle stability was determined under different scenarios. The first scenario was large and small radius turning, followed by simulating a combination of turning, braking, and traction. This was followed by an analysis of the disturbance of vehicle stability, including the bank angle, the effect of a lateral wind and the coefficient of friction. Finally, the effect of roll motion such as load transfer and roll steer, and how an independent driving system would affect vehicle stability is presented.
An active steering PID controller was suggested and which, according to the results of the simulation, improved the yaw plane stability (side slip angle).
Subjects/Keywords: modelling; stability analysis; omni-directional; control
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APA ·
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APA (6th Edition):
Li, B. (2012). Modelling, dynamic stability analysis and control of an omni-directional road vehicle. (Masters Thesis). University of Wollongong. Retrieved from ; https://ro.uow.edu.au/theses/3602
Chicago Manual of Style (16th Edition):
Li, Boyuan. “Modelling, dynamic stability analysis and control of an omni-directional road vehicle.” 2012. Masters Thesis, University of Wollongong. Accessed February 25, 2020.
; https://ro.uow.edu.au/theses/3602.
MLA Handbook (7th Edition):
Li, Boyuan. “Modelling, dynamic stability analysis and control of an omni-directional road vehicle.” 2012. Web. 25 Feb 2020.
Vancouver:
Li B. Modelling, dynamic stability analysis and control of an omni-directional road vehicle. [Internet] [Masters thesis]. University of Wollongong; 2012. [cited 2020 Feb 25].
Available from: ; https://ro.uow.edu.au/theses/3602.
Council of Science Editors:
Li B. Modelling, dynamic stability analysis and control of an omni-directional road vehicle. [Masters Thesis]. University of Wollongong; 2012. Available from: ; https://ro.uow.edu.au/theses/3602
San Jose State University
18.
Flood, Charles Allen.
Unified Software Engineering Reuse: A Methodology for Effective Software Reuse.
Degree: MS, Computer Engineering, 2017, San Jose State University
URL: https://doi.org/10.31979/etd.dc8u-x65e
;
https://scholarworks.sjsu.edu/etd_theses/4796
► Software is a necessity in the modern world, and that need is continuously growing. As expensive as the creation of all this new software…
(more)
▼ Software is a necessity in the modern world, and that need is continuously growing. As expensive as the creation of all this new software is, the maintenance costs are even greater. One solution to this problem is software reuse, whereby already written software can be applied to new problems after some modification, thus reducing the overall input of new code. The goal in traditional software reuse is to produce a piece of software with enough flexibility to be used at least twice. Unfortunately, there are many difficulties in achieving software reuse using modern programming techniques. Even software built specifically for reuse is severely restricted in its utility for new applications. It is easy for new programs to require entirely new logic or new objects. Because of this, they become quickly outdated, and any labor spent creating reusable software is nullified. The solution is a method to vastly increase the reusability of software by concentrating on the base knowledge and overall goals of software rather than the details on a case-by-case basis. Finding patterns in the problem and solution spaces allows unification into a smaller solution set. Instead of each problem receiving its own solution from marginally reusable components, multiple problems are resolved with the same architecture and object set. As an added benefit, this solution will not only vastly improve software reuse, but it will make feasible systems that can construct software architecture on demand and provide the first steps to fully automated software development.
Subjects/Keywords: analysis; design; pattern; reuse; software; stability
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APA (6th Edition):
Flood, C. A. (2017). Unified Software Engineering Reuse: A Methodology for Effective Software Reuse. (Masters Thesis). San Jose State University. Retrieved from https://doi.org/10.31979/etd.dc8u-x65e ; https://scholarworks.sjsu.edu/etd_theses/4796
Chicago Manual of Style (16th Edition):
Flood, Charles Allen. “Unified Software Engineering Reuse: A Methodology for Effective Software Reuse.” 2017. Masters Thesis, San Jose State University. Accessed February 25, 2020.
https://doi.org/10.31979/etd.dc8u-x65e ; https://scholarworks.sjsu.edu/etd_theses/4796.
MLA Handbook (7th Edition):
Flood, Charles Allen. “Unified Software Engineering Reuse: A Methodology for Effective Software Reuse.” 2017. Web. 25 Feb 2020.
Vancouver:
Flood CA. Unified Software Engineering Reuse: A Methodology for Effective Software Reuse. [Internet] [Masters thesis]. San Jose State University; 2017. [cited 2020 Feb 25].
Available from: https://doi.org/10.31979/etd.dc8u-x65e ; https://scholarworks.sjsu.edu/etd_theses/4796.
Council of Science Editors:
Flood CA. Unified Software Engineering Reuse: A Methodology for Effective Software Reuse. [Masters Thesis]. San Jose State University; 2017. Available from: https://doi.org/10.31979/etd.dc8u-x65e ; https://scholarworks.sjsu.edu/etd_theses/4796
Université Catholique de Louvain
19.
Romo Hernandez, Aaron.
A thermodynamic approach to modeling and stability analysis of multiphase systems.
Degree: 2019, Université Catholique de Louvain
URL: http://hdl.handle.net/2078.1/219069
► Thermodynamic systems design, analysis, and operation stand as fundamental elements in process systems engineering. In this thesis, we investigate how to characterize multiphase thermodynamic systems…
(more)
▼ Thermodynamic systems design, analysis, and operation stand as fundamental elements in process systems engineering. In this thesis, we investigate how to characterize multiphase thermodynamic systems using physics-based methodologies. Multiphase systems are frequently assumed to operate as quasistationary processes. Quasistationary systems are restricted to evolve inside an abstract space known as the equilibrium manifold. We suggest the possibility of multiphase processes to operate far from the thermodynamic equilibrium manifold. Through the scope of (classical) irreversible thermodynamics, we address the modeling and analysis aspects of multiphase systems far from equilibrium. Using compartmental modeling techniques, we represent multiphase systems as the interconnection of simpler subsystems each of which has well defined (and not necessarily homogeneous) physical properties. Conservation laws on mass, energy, and momentum define the state of multiphase processes as the solution to differential-algebraic equation systems. As the main result for this thesis, we show that multiphase processes can evolve far from thermodynamic equilibrium as long as the state of the system is contained in what we call a domain of physical feasibility. The existence of the domain of feasibility follows as a direct consequence of the second law of thermodynamics applied to the study of multiphase systems.
(FSA - Sciences de l'ingénieur) – UCL, 2019
Advisors/Committee Members: UCL - SST/ICTM/INMA - Pôle en ingénierie mathématique, UCL - Ecole Polytechnique de Louvain, Dochain, Denis, Lefèvre, Philippe, Crevecoeur, Frédéric, Hudon, Nicolas, Ydstie, Erik B., Álvarez Alonso, Antonio.
Subjects/Keywords: Thermodynamics; Process Systems; Multiphase Systems; Stability Analysis
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APA (6th Edition):
Romo Hernandez, A. (2019). A thermodynamic approach to modeling and stability analysis of multiphase systems. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/219069
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Romo Hernandez, Aaron. “A thermodynamic approach to modeling and stability analysis of multiphase systems.” 2019. Thesis, Université Catholique de Louvain. Accessed February 25, 2020.
http://hdl.handle.net/2078.1/219069.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Romo Hernandez, Aaron. “A thermodynamic approach to modeling and stability analysis of multiphase systems.” 2019. Web. 25 Feb 2020.
Vancouver:
Romo Hernandez A. A thermodynamic approach to modeling and stability analysis of multiphase systems. [Internet] [Thesis]. Université Catholique de Louvain; 2019. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/2078.1/219069.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Romo Hernandez A. A thermodynamic approach to modeling and stability analysis of multiphase systems. [Thesis]. Université Catholique de Louvain; 2019. Available from: http://hdl.handle.net/2078.1/219069
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of KwaZulu-Natal
20.
Chibanda, Mwila.
Grain yield stability, genetic gain and path coefficient analyses in advanced soybean (Glycine max (L.) Merr.) lines.
Degree: 2017, University of KwaZulu-Natal
URL: https://researchspace.ukzn.ac.za/handle/10413/16862
► Zambia is among the top 20 leading global producers of soybean (Glycine max L. Merr.) but adequate production is still hampered by low productivity. The…
(more)
▼ Zambia is among the top 20 leading global producers of soybean (Glycine max L. Merr.) but adequate production is still hampered by low productivity. The yields of soybean in Zambia average below 3.0 t/ha against a yield potential of 5.0 t/ha. This is attributed in part to poor availability of well adapted and improved cultivars. Therefore, selection for high yield potential is the prime objective of the breeding programme in the medium altitude and subtropical environments in Africa. Unfortunately, spatial and seasonal variability is large in this ecological zone. Therefore, the objectives of the study were to assess the nature and magnitude of the genotype x environmental (G x E) interactions for grain yield, to identify stable genotypes; to determine the genetic gains achieved in breeding for grain yield over 12 years, and to determine the secondary traits that directly or indirectly affect yield in soybean cultivars. Thirty genotypes that were drawn from the advanced set of lines in the programme were evaluated across 16 locations in Zambia, Malawi and Zimbabwe. The experiments were laid out in a 6 x 5 alpha lattice design, with three replications at each site. The recommended cultural practices were followed at all sites in all countries. The data were subjected to
analysis of variance (ANOVA, correlation and path coefficient
analysis, cultivar superiority index, Additive main effects and multiplicative interaction (AMMI) and Genotype, Genotype and Environment (GGE) biplot analyses, in GenStat statistical software. There were significant genotypes main effects, environment main effects and their interaction effects. The G x E of cross over type was observed. The genotypes G2, G10 and G15 were ranked among most stable genotypes by all methods, while G2 was the most desirable genotype across locations, followed by G15. Biplot
analysis revealed that E6 was the most discriminative test location while the most representative one was E4. The genetic gain study showed a 21% gain in Zambia and Malawi. No significant gain was registered in Zimbabwe. An across site
analysis of all test locations resulted in a disappearance of all genetic gain earlier observed. The cross over GXE interaction negatively affected heritability of grain yield and masked the appearance of any gains. Overall, a 6.5% gain over the population mean, showed that selection was successful in increasing yield. However, there was no significant gain observed relative to the current commercial cultivars, indicating limited breeding progress. The results of PATH correlation
analysis showed that yield was positively and significantly correlated with all traits except the number of seeds per pod. However, the correlation was weak with the exception of harvest index. The harvest index, biomass and number of pods per plant had significant influence on yield. Selection for these three traits, Harvest index, biomass and number of pods per plant would be emphasised to improve yield potential in the soybean programme.
Advisors/Committee Members: Derera, John. (advisor), Sibiya, Julia. (advisor).
Subjects/Keywords: Yield.; Stability.; Genetic gain.; Soybean.; Coefficient analysis.
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APA (6th Edition):
Chibanda, M. (2017). Grain yield stability, genetic gain and path coefficient analyses in advanced soybean (Glycine max (L.) Merr.) lines. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/16862
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chibanda, Mwila. “Grain yield stability, genetic gain and path coefficient analyses in advanced soybean (Glycine max (L.) Merr.) lines.” 2017. Thesis, University of KwaZulu-Natal. Accessed February 25, 2020.
https://researchspace.ukzn.ac.za/handle/10413/16862.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chibanda, Mwila. “Grain yield stability, genetic gain and path coefficient analyses in advanced soybean (Glycine max (L.) Merr.) lines.” 2017. Web. 25 Feb 2020.
Vancouver:
Chibanda M. Grain yield stability, genetic gain and path coefficient analyses in advanced soybean (Glycine max (L.) Merr.) lines. [Internet] [Thesis]. University of KwaZulu-Natal; 2017. [cited 2020 Feb 25].
Available from: https://researchspace.ukzn.ac.za/handle/10413/16862.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chibanda M. Grain yield stability, genetic gain and path coefficient analyses in advanced soybean (Glycine max (L.) Merr.) lines. [Thesis]. University of KwaZulu-Natal; 2017. Available from: https://researchspace.ukzn.ac.za/handle/10413/16862
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Vilnius Gediminas Technical University
21.
Grigalius,
Nerijus.
Keturračio motociklo stovumo
tyrimas.
Degree: Master, Transport Engineering, 2010, Vilnius Gediminas Technical University
URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100609_125342-09606
;
► Baigiamajame magistro darbe nagrinėjamas keturračio motociklo stovumas. Darbe analizuojama stovumo tyrimo struktūra. Analitinėje dalyje nustatomi penkių pasirinktų keturračių motociklų stovumo parametrai – svorių centrai, išilginio…
(more)
▼ Baigiamajame magistro darbe nagrinėjamas
keturračio motociklo stovumas. Darbe analizuojama stovumo tyrimo
struktūra. Analitinėje dalyje nustatomi penkių pasirinktų
keturračių motociklų stovumo parametrai – svorių centrai, išilginio
bei šoninio virtimo kampai, atliekamas bandytų keturračių motociklų
palyginimas. Apskaičiuojami dinaminio stovumo parametrai,
nustatomos virtimo greičio, pagreičio reikšmės. Atliekamas
modeliavimas taikomąja programa. Eksperimentinė darbo dalis apima
statinio bei dinaminio stovumo bandymus. Jų metu nustatomi slydimo
bei virtimo pradžios kampai, virtimo greičiai bei pagreičiai. Darbo
pabaigoje suformuluotos išvados, pateikiami pasiūlymai. Darbą
sudaro 7 pagrindinės dalys: įvadas, literatūros analizė, bendras
keturračio motociklo stovumo įvertinimas, pagrindinių parametrų,
įvertinančių statinio stovumo sąlygas nustatymas, dinaminio stovumo
parametrų nustatymas, eksperimentinis bandymas, išvados, naudota
literatūra. Darbo apimtis 60 psl. teksto be priedų, 32
iliustracijos, 10 lentelių, 15 bibliografinių šaltinių, 9
internetinės prieigos.
Four - wheeled motorcycle stability research
has been made in my final work for magistracy. The main principles
of stability investigation and work order were analyzed. Analytical
part contains the analysis of five selected all terrain vehicles –
determining center of gravity, longitudinal and lateral slip
angles, rollover condition calculations, comparison of acquired
data. Also parameters of dynamic stability are estimated –
determined the critical speed, lateral acceleration values.
Calculations are supported by computer simulation results.
Practical part is carried out according to the chosen method of
testing. Static stability test checks the beginning of a slip and
roll angles. Dynamic stability is tested according constant radius
method – acquired results are critical speed and lateral
acceleration. Conclusion, possible problem solutions and
perspectives are represented at the end of the work. Project
consists of 7 main parts: Introduction, literary analysis, joint
assessment of the stability of four wheeled motorcycle,
determination of basic parameters analyzing static stability,
determination of basic parameters analyzing dynamic stability, the
experimental test, conclusion and used literature. Total work
amount 60 pages without supplement. 32 llustrations, 10 charts, 15
bibliographical sources, 9 web pages.
Advisors/Committee Members: Garbinčius, Giedrius (Master’s thesis supervisor), Pukalskas, Saugirdas (Master’s thesis reviewer), Pečeliūnas, Robertas (Master’s thesis reviewer), Zautra, Rytis (Master’s degree committee chair), Valiūnas, Valdas (Master’s degree committee member), Gedzevičius, Irmantas (Master’s degree committee member).
Subjects/Keywords: Keturratis
motociklas; Statinio stovumo
tyrimas; Dinaminio stovumo
tyrimas; Stability of four wheeled
motorcycle; Static stability
analysis; Dynamic stability
analysis
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APA (6th Edition):
Grigalius,
Nerijus. (2010). Keturračio motociklo stovumo
tyrimas. (Masters Thesis). Vilnius Gediminas Technical University. Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100609_125342-09606 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
Grigalius,
Nerijus. “Keturračio motociklo stovumo
tyrimas.” 2010. Masters Thesis, Vilnius Gediminas Technical University. Accessed February 25, 2020.
http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100609_125342-09606 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
Grigalius,
Nerijus. “Keturračio motociklo stovumo
tyrimas.” 2010. Web. 25 Feb 2020.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
Grigalius,
Nerijus. Keturračio motociklo stovumo
tyrimas. [Internet] [Masters thesis]. Vilnius Gediminas Technical University; 2010. [cited 2020 Feb 25].
Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100609_125342-09606 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
Grigalius,
Nerijus. Keturračio motociklo stovumo
tyrimas. [Masters Thesis]. Vilnius Gediminas Technical University; 2010. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100609_125342-09606 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
East Tennessee State University
22.
Pei, Ruhang.
Revised Model for Antibiotic Resistance in a Hospital.
Degree: MS, Mathematical Sciences, 2015, East Tennessee State University
URL: https://dc.etsu.edu/etd/2471
► In this thesis we modify an existing model for the spread of resistant bacteria in a hospital. The existing model does not account for…
(more)
▼ In this thesis we modify an existing model for the spread of resistant bacteria in a hospital. The existing model does not account for some of the trends seen in the data found in literature. The new model takes some of these trends into account. For the new model, we examine issues relating to identifiability, sensitivity analysis, parameter estimation, uncertainty analysis, and equilibrium stability.
Subjects/Keywords: Antibiotic resistance; Identifiability; Sensitivity Analysis; Parameter Estimation; Uncertainty Analysis; Equilibrium; Stability Analysis; Analysis; Other Mathematics
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APA (6th Edition):
Pei, R. (2015). Revised Model for Antibiotic Resistance in a Hospital. (Masters Thesis). East Tennessee State University. Retrieved from https://dc.etsu.edu/etd/2471
Chicago Manual of Style (16th Edition):
Pei, Ruhang. “Revised Model for Antibiotic Resistance in a Hospital.” 2015. Masters Thesis, East Tennessee State University. Accessed February 25, 2020.
https://dc.etsu.edu/etd/2471.
MLA Handbook (7th Edition):
Pei, Ruhang. “Revised Model for Antibiotic Resistance in a Hospital.” 2015. Web. 25 Feb 2020.
Vancouver:
Pei R. Revised Model for Antibiotic Resistance in a Hospital. [Internet] [Masters thesis]. East Tennessee State University; 2015. [cited 2020 Feb 25].
Available from: https://dc.etsu.edu/etd/2471.
Council of Science Editors:
Pei R. Revised Model for Antibiotic Resistance in a Hospital. [Masters Thesis]. East Tennessee State University; 2015. Available from: https://dc.etsu.edu/etd/2471
Georgia Tech
23.
Ghazizadeh Karani, Hamid Reza.
A multiscale analysis of heat transfer in porous media.
Degree: PhD, Earth and Atmospheric Sciences, 2017, Georgia Tech
URL: http://hdl.handle.net/1853/59236
► The modeling of thermal convection in porous media is a challenging task due to the inherent structural and thermophysical heterogeneities that permeate over several scales.…
(more)
▼ The modeling of thermal convection in porous media is a challenging task due to the inherent structural and thermophysical heterogeneities that permeate over several scales. In the present thesis, I address several issues relevant to buoyancy-driven thermal convection in porous media. The central question we address is how to develop a macroscopic model of heat transfer in porous media that incorporates the pore-scale physics in a consistent manner. Our approach is based on establishing a multi-scale framework built on knowledge accrued by theoretical, numerical and experimental methods.
In Chapter 2, we develop a pore-scale computational tool based on a lattice Boltzmann (LB) model. This computational tool enables us to tackle thermal convection from a pore-scale perspective and to provide benchmarks for the development of an appropriate continuum-scale models. In Chapter 3, we use our LB model and conduct high-resolution direct numerical simulation at the pore scale. The objective is to evaluate the underlying assumptions of upscaled thermal models and to assess the role of thermophysical heterogeneties on heat transfer. We benefit from the insights gained from our pore-scale results and propose a new upscaled energy model for thermal convection in Chapter 4. The proposed model is based on a fractional-order advective term, which models the influence of thermal heterogeneities in a flexible and consistent way. In Chapter 5, we used a combination of theoretical and experimental approaches to calculate a new metric, basin
stability, for quantifying the respective relative
stability of coexisting convection modes in porous media. We show that transition between convective modes predicted by the basin
stability analysis agrees well with the experiments from our IR thermography visualization setup.
Advisors/Committee Members: Huber, Christian (advisor), Dufek, Joe (committee member), Simon, Sven (committee member), Ferrier, Ken (committee member), Magin, Richard L (committee member).
Subjects/Keywords: Thermal convection; Porous media; Multi-scale analysis; Lattice-Boltzmann method; Fractional-order thermal dispersion; Linear stability analysis; Basin stability analysis.
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to Zotero / EndNote / Reference
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APA (6th Edition):
Ghazizadeh Karani, H. R. (2017). A multiscale analysis of heat transfer in porous media. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59236
Chicago Manual of Style (16th Edition):
Ghazizadeh Karani, Hamid Reza. “A multiscale analysis of heat transfer in porous media.” 2017. Doctoral Dissertation, Georgia Tech. Accessed February 25, 2020.
http://hdl.handle.net/1853/59236.
MLA Handbook (7th Edition):
Ghazizadeh Karani, Hamid Reza. “A multiscale analysis of heat transfer in porous media.” 2017. Web. 25 Feb 2020.
Vancouver:
Ghazizadeh Karani HR. A multiscale analysis of heat transfer in porous media. [Internet] [Doctoral dissertation]. Georgia Tech; 2017. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/1853/59236.
Council of Science Editors:
Ghazizadeh Karani HR. A multiscale analysis of heat transfer in porous media. [Doctoral Dissertation]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/59236
NSYSU
24.
Chen, Bo-jyun.
Design and Development of Automatic-Foldable Mechanical for Rollators.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2015, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-100815
► In this study, a new folding walker is designed to improve the problems of large volume and difficult to fold in the general market, then…
(more)
▼ In this study, a new folding walker is designed to improve the problems of large volume and difficult to fold in the general market, then it can be folded easily and portable folding. So that it can improve the independence and convenience of life for the elderly or those with reduced mobility to reduce the burden and accidental falls.
In this study, two walkers are designed for indoor and outdoor respectively. A three-wheeled walker which have higher operability is need because of the small interior space. In addition, a four-wheeled walker which have higher
stability is need because of the outside jolt road. First, design 3D model and size with Pro/Engineer, then create a mathematical model to test the walker static
stability and calculate the critical angle in dump walker with Matlab to check the walker whether conforms the standard of CNS static
stability test, in the end, according to the
analysis of stress and deformation in Pro/e Mechanica can make sure whether it is defective or broken in the structure of the walker.
In this study, the new folding structure can be folded to the minimum volume in different way. A four-wheeled walker uses the front and rear combine left and right folding way to achieve the goal of storage. Finally, the new three-wheeled walker or four-wheeled walker forward tilt and side tilt
stability are higher than Trust Care walker.
Advisors/Committee Members: Jau-Wei Perng (chair), Wei-Huang Lin (chair), Yih-Tun Tseng (committee member).
Subjects/Keywords: Stress Analysis; Rollator; Stability Analysis; Foldable Structure; Aids Device
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APA (6th Edition):
Chen, B. (2015). Design and Development of Automatic-Foldable Mechanical for Rollators. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-100815
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chen, Bo-jyun. “Design and Development of Automatic-Foldable Mechanical for Rollators.” 2015. Thesis, NSYSU. Accessed February 25, 2020.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-100815.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Bo-jyun. “Design and Development of Automatic-Foldable Mechanical for Rollators.” 2015. Web. 25 Feb 2020.
Vancouver:
Chen B. Design and Development of Automatic-Foldable Mechanical for Rollators. [Internet] [Thesis]. NSYSU; 2015. [cited 2020 Feb 25].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-100815.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen B. Design and Development of Automatic-Foldable Mechanical for Rollators. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-100815
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Western Australia
25.
Wu, Jing.
Static modelling and stability analysis of non-slewing articulated mobile cranes.
Degree: M. Eng.Sc., 2012, University of Western Australia
URL: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=34763&local_base=GEN01-INS01
► Non-slewing articulated mobile (NSAM) cranes are widely used in construction, manufacturing, and mining industries in Australia. However, the occurrence of several tipping accidents in Australia…
(more)
▼ Non-slewing articulated mobile (NSAM) cranes are widely used in construction, manufacturing, and mining industries in Australia. However, the occurrence of several tipping accidents in Australia has raised concerns about their stability. This project aims to explore the operating factors contributing to the NSAM crane tipping accident, examine the inherent stability of the NSAM crane design, and suggest the potential development of a new monitoring system to reduce the likelihood of the accidents. It does this using geometrical modelling and theoretical static force analysis. A general static model for the stability study of NSAM cranes on slopes with various orientations is developed and an investigation into the tip-over and roll-over stabilities of the model under a number of static conditions is presented in this thesis. Based on the developed model, the articulation angle, the slope gradient, the orientation angle, and the height of the boom are the main operating factors contributing to the NSAM crane tipping accidents. The results of the examination of the inherent NSAM crane design suggests that having the articulation joints at the centre of the wheel base is a suitable design for NSAM cranes for the maneuverability and tip-over stability but not for the roll-over stability. After the explanation of the shortcomings of the current monitoring system for NSAM cranes, this project suggests the potential development of a new monitoring system based on the result of the developed model. Such a device would likely increase the safety of these machines.
Non-slewing articulated mobile (NSAM) cranes are widely used in construction, manufacturing, and mining industries in Australia. However, the occurrence of several tipping accidents in Australia has raised concerns about their stability. This project aims to explore the operating factors contributing to the NSAM crane tipping accident, examine the inherent stability of the NSAM crane design, and suggest the potential development of a new monitoring system to reduce the likelihood of the accidents. It does this using geometrical modelling and theoretical static force analysis. A general static model for the stability study of NSAM cranes on slopes with various orientations is developed and an investigation into the tip-over and roll-over stabilities of the model under a number of static conditions is presented in this thesis. Based on the developed model, the articulation angle, the slope gradient, the orientation angle, and the height of the boom are the main operating factors contributing to the NSAM crane tipping accidents. The results of the examination of the inherent NSAM crane design suggests that having the articulation joints at the centre of the wheel base is a suitable design for NSAM cranes for the maneuverability and tip-over stability but not for the roll-over stability. After the explanation of the shortcomings of the current monitoring system for NSAM cranes, this project suggests the potential development of a new monitoring system based on…
Subjects/Keywords: Stability analysis; Mobile crane; Articulated vehicle; Static analysis
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Manager
APA (6th Edition):
Wu, J. (2012). Static modelling and stability analysis of non-slewing articulated mobile cranes. (Masters Thesis). University of Western Australia. Retrieved from http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=34763&local_base=GEN01-INS01
Chicago Manual of Style (16th Edition):
Wu, Jing. “Static modelling and stability analysis of non-slewing articulated mobile cranes.” 2012. Masters Thesis, University of Western Australia. Accessed February 25, 2020.
http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=34763&local_base=GEN01-INS01.
MLA Handbook (7th Edition):
Wu, Jing. “Static modelling and stability analysis of non-slewing articulated mobile cranes.” 2012. Web. 25 Feb 2020.
Vancouver:
Wu J. Static modelling and stability analysis of non-slewing articulated mobile cranes. [Internet] [Masters thesis]. University of Western Australia; 2012. [cited 2020 Feb 25].
Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=34763&local_base=GEN01-INS01.
Council of Science Editors:
Wu J. Static modelling and stability analysis of non-slewing articulated mobile cranes. [Masters Thesis]. University of Western Australia; 2012. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=34763&local_base=GEN01-INS01
University of Ottawa
26.
Roy, Thomas.
Time-Stepping Methods in Cardiac Electrophysiology
.
Degree: 2015, University of Ottawa
URL: http://hdl.handle.net/10393/32626
► Modelling in cardiac electrophysiology results in a complex system of partial differential equations (PDE) describing the propagation of the electrical wave in the heart muscle…
(more)
▼ Modelling in cardiac electrophysiology results in a complex system of partial differential equations (PDE) describing the propagation of the
electrical wave in the heart muscle coupled with a highly nonlinear system of ordinary differential equations (ODE) describing the ionic
activity in the cardiac cells. This system forms the widely accepted bidomain model or its slightly simpler version, the monodomain model.
To a large extent, the stiffness of the whole model depends on the choice of the ionic model, which varies in terms of complexity and
realism. These simulations require accurate and, depending on the ionic model used, possibly very stable numerical methods. At this time,
solving these models numerically requires CPU time of around one day per heartbeat. Therefore, it is necessary to use the most efficient
method for these simulations.
This research focuses on the comparison and analysis of several time-stepping methods: explicit or semi-implicit, operator splitting, deferred correction and Rush-Larsen methods. The goal is to find the optimal method for the ionic model used. For our analysis, we used the monodomain model but our results apply to the bidomain model as well. We compare the methods for three ionic models of varying complexity and stiffness: the Mitchell-Schaeffer models with only 2 variables, the more realistic Beeler-Reuter model with 8 variables, and the stiff
and very complex ten Tuscher-Noble-Noble-Panfilov (TNNP) models with 17 variables. For each method, we derived absolute stability criteria of the spatially discretized monodomain model and verified that the theoretical critical time steps obtained closely match the ones in numerical experiments. Convergence tests were also conducted to verify that the numerical methods achieve an optimal order of convergence on the model variables and derived quantities (such as speed of the wave, depolarization time), and this in spite of the local non-differentiability of some of the ionic models. We looked at the efficiency of the different methods by comparing computational times for similar accuracy. Conclusions are drawn on the methods to be used to solve the monodomain model based on the model stiffness and complexity, measured respectively by the most negative eigenvalue of the model's Jacobian and the number of variables, and based on strict stability and accuracy criteria.
Subjects/Keywords: Cardiac Electrophysiology;
Heart Simulation;
Numerical Analysis;
Stability Analysis;
Semi-Implicit methods
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APA ·
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Export
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Manager
APA (6th Edition):
Roy, T. (2015). Time-Stepping Methods in Cardiac Electrophysiology
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/32626
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Roy, Thomas. “Time-Stepping Methods in Cardiac Electrophysiology
.” 2015. Thesis, University of Ottawa. Accessed February 25, 2020.
http://hdl.handle.net/10393/32626.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Roy, Thomas. “Time-Stepping Methods in Cardiac Electrophysiology
.” 2015. Web. 25 Feb 2020.
Vancouver:
Roy T. Time-Stepping Methods in Cardiac Electrophysiology
. [Internet] [Thesis]. University of Ottawa; 2015. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/10393/32626.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Roy T. Time-Stepping Methods in Cardiac Electrophysiology
. [Thesis]. University of Ottawa; 2015. Available from: http://hdl.handle.net/10393/32626
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Texas – Austin
27.
Biju-Duval, Paul, Ph. D.
Development of three-dimensional finite element software for curved plate girder and tub girder bridges during construction.
Degree: PhD, Civil Engineering, 2018, University of Texas – Austin
URL: http://hdl.handle.net/2152/63687
► Because of its ability to be easily shaped, steel is an attractive material for curved girders. Plate girder and tub girder bridges, for example, are…
(more)
▼ Because of its ability to be easily shaped, steel is an attractive material for curved girders. Plate girder and tub girder bridges, for example, are often the preferred solution for direct connectors in highway networks. This flexibility in fabrication, however, presents challenges for structural engineers because of the difficulties associated with accounting for combined bending and torsion with curved geometry. The potential presence of skewed supports is a further source of complexity. In fact, no commercial structural engineering program currently addresses the evaluation of plate girder and tub girder bridges while modeling them to the full extent of their three-dimensional configuration. Most engineers, for example, use a two-dimensional bridge representation, which is often accurate for typical design of a complete bridge but may also be unconservative in many cases. The few programs that allow a full three-dimensional representation require extensive knowledge of finite element theory as well as significant time to model any complex structure.
This dissertation presents the assumptions, methodology and calculations involved in the programming of a new structural engineering program designed to assess the behavior and
stability or curved plate girder and tub girder bridges during erection or deck
placement. It then illustrates the capabilities of the program for various structural systems subjected to a variety of loads, from self-weight to wind and temperature loads. In addition to a linear elastic
analysis, multiple types of
analysis are offered to the engineer: a geometrically nonlinear
analysis provides a more accurate behavior for flexible systems, a linearized buckling
analysis yields an upper bound evaluation of the
stability of the structure, while a modal dynamic
analysis estimates the free vibration modes of that structure.
Advisors/Committee Members: Helwig, Todd Aaron, 1965- (advisor), Williamson, Eric B., 1968- (advisor), Bayrak, Oguzhan (committee member), Clayton, Patricia M (committee member), Engelhardt, Michael D (committee member), Landis, Chad M (committee member).
Subjects/Keywords: Steel bridges; Finite element analysis; Structural stability; Curved bridges; Buckling analysis
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APA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Biju-Duval, Paul, P. D. (2018). Development of three-dimensional finite element software for curved plate girder and tub girder bridges during construction. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/63687
Chicago Manual of Style (16th Edition):
Biju-Duval, Paul, Ph D. “Development of three-dimensional finite element software for curved plate girder and tub girder bridges during construction.” 2018. Doctoral Dissertation, University of Texas – Austin. Accessed February 25, 2020.
http://hdl.handle.net/2152/63687.
MLA Handbook (7th Edition):
Biju-Duval, Paul, Ph D. “Development of three-dimensional finite element software for curved plate girder and tub girder bridges during construction.” 2018. Web. 25 Feb 2020.
Vancouver:
Biju-Duval, Paul PD. Development of three-dimensional finite element software for curved plate girder and tub girder bridges during construction. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2018. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/2152/63687.
Council of Science Editors:
Biju-Duval, Paul PD. Development of three-dimensional finite element software for curved plate girder and tub girder bridges during construction. [Doctoral Dissertation]. University of Texas – Austin; 2018. Available from: http://hdl.handle.net/2152/63687
University of Newcastle
28.
Crumpton, Mason.
Adaptive discontinuity layout optimisation for geotechnical stability analysis.
Degree: PhD, 2018, University of Newcastle
URL: http://hdl.handle.net/1959.13/1390955
► Research Doctorate - Doctor of Philosophy (PhD)
Discontinuity Layout Optimisation (DLO) is a novel geotechnical stability analysis method which is based on the upper bound…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
Discontinuity Layout Optimisation (DLO) is a novel geotechnical stability analysis method which is based on the upper bound limit theorem. In principal, the method works by identifying an optimum collapse mechanism in a mesh of many potential mechanisms which are constructed by drawing velocity discontinuities between pairs of nodes in a grid. This approach leads to a simple formulation and avoids the numerical complications associated with modelling complete load-displacement relationships. It also has a low dependence on a priori information as meshes do not explicitly employ rigid blocks or finite elements which perform best when orientated according to the stress or velocity field at failure. However, the DLO method leads to large optimisation problems which are impractical to solve without smart algorithms. Since DLO was pioneered by Smith & Gilbert in 2007 [1], it’s functionality has been extended to model a wide range of geotechnical processes and phenomena, but there have been few developments published that concern its efficiency. This thesis describes a range of new developments for enhancing the performance of the DLO method. These include modifications to the iterative optimisation procedure at its core, and a new Adaptive Discontinuity Layout Optimisation (ADLO) procedure. The ADLO procedure improves performance by using a posteriori interpolation error estimates to refine meshes so that fewer nodes are needed to attain a specific degree of solution accuracy. Ultimately, all the new developments seek to improve performance by reducing the DLO optimisation problem size, or number of iterations needed to solve it. The new developments have been incorporated in an enhanced DLO algorithm and an adaptive DLO algorithm which were implemented in a Layout Optimisation Analysis Software (LOAS) package. This software was used to analyse a series of geotechnical stability problems so that the performance of the algorithms could be studied and compared with the Finite Element Limit Analysis (FELA) method ([2],[3],[4],[5]). It was found that all but one of the new developments consistently improved the performance of the DLO method by reducing the analysis time and optimisation problem size needed to attain a specific degree of solution accuracy. When the enhanced DLO, adaptive DLO, and FELA analysis methods were compared it was found that, for the stability cases considered, the DLO based methods were competitive with FELA in terms of computational performance.
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: geotechnical stability analysis; limit analysis; discontinuity layout optimisation; adaptive meshing
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Crumpton, M. (2018). Adaptive discontinuity layout optimisation for geotechnical stability analysis. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1390955
Chicago Manual of Style (16th Edition):
Crumpton, Mason. “Adaptive discontinuity layout optimisation for geotechnical stability analysis.” 2018. Doctoral Dissertation, University of Newcastle. Accessed February 25, 2020.
http://hdl.handle.net/1959.13/1390955.
MLA Handbook (7th Edition):
Crumpton, Mason. “Adaptive discontinuity layout optimisation for geotechnical stability analysis.” 2018. Web. 25 Feb 2020.
Vancouver:
Crumpton M. Adaptive discontinuity layout optimisation for geotechnical stability analysis. [Internet] [Doctoral dissertation]. University of Newcastle; 2018. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/1959.13/1390955.
Council of Science Editors:
Crumpton M. Adaptive discontinuity layout optimisation for geotechnical stability analysis. [Doctoral Dissertation]. University of Newcastle; 2018. Available from: http://hdl.handle.net/1959.13/1390955
California State University – Channel Islands
29.
Lee, Seungju.
Statistical Analysis of Stability of Repacked Pharmaceutical Products
.
Degree: 2018, California State University – Channel Islands
URL: http://hdl.handle.net/10211.3/207594
► Packaging/repackaging is essential to ensure pharmaceutical product???s stability (i.e. efficacy and safety). Before processing to package/repackage products into container/closures, there must be evidence to verify…
(more)
▼ Packaging/repackaging is essential to ensure pharmaceutical product???s
stability (i.e. efficacy and safety). Before processing to package/repackage products into container/closures, there must be evidence to verify its
stability. The most common verification methods are real-time study and statistical
analysis. Real-time study can be very accurate, but it is also timeconsuming, which is inadequate for industry use. On the other hand, statistical
analysis is appropriate for industry use since it can take short-term data and obtain the results quickly. In particular, we apply regression
analysis on pharmaceutical product container/closure data along its decision-making framework to determine a container height 95% confidence interval and estimate the shelf life. Using a freeware program R, we are able to conduct the
analysis more quickly and efficiently.
Advisors/Committee Members: Kryshchenko, Dr. Alona (advisor), Garcia, Dr. Jorge (committeeMember).
Subjects/Keywords: Mathematics thesis;
Regression analysis;
Repackaging Pharmaceutical Products;
Drug stability;
Stability for container/closure configuration;
Stability for assay and dissolution
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APA ·
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Export
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Manager
APA (6th Edition):
Lee, S. (2018). Statistical Analysis of Stability of Repacked Pharmaceutical Products
. (Thesis). California State University – Channel Islands. Retrieved from http://hdl.handle.net/10211.3/207594
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lee, Seungju. “Statistical Analysis of Stability of Repacked Pharmaceutical Products
.” 2018. Thesis, California State University – Channel Islands. Accessed February 25, 2020.
http://hdl.handle.net/10211.3/207594.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lee, Seungju. “Statistical Analysis of Stability of Repacked Pharmaceutical Products
.” 2018. Web. 25 Feb 2020.
Vancouver:
Lee S. Statistical Analysis of Stability of Repacked Pharmaceutical Products
. [Internet] [Thesis]. California State University – Channel Islands; 2018. [cited 2020 Feb 25].
Available from: http://hdl.handle.net/10211.3/207594.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lee S. Statistical Analysis of Stability of Repacked Pharmaceutical Products
. [Thesis]. California State University – Channel Islands; 2018. Available from: http://hdl.handle.net/10211.3/207594
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – Berkeley
30.
Shia, Victor Andrew.
A Framework for Computing the Stability of Human Motion.
Degree: Electrical Engineering & Computer Sciences, 2016, University of California – Berkeley
URL: http://www.escholarship.org/uc/item/5pf9g7v9
► Every year, 2.5 million people visit the emergency department accounting for $34 billion in hospital visits, stays and treatment. Financial considerations aside, falling once results…
(more)
▼ Every year, 2.5 million people visit the emergency department accounting for $34 billion in hospital visits, stays and treatment. Financial considerations aside, falling once results in the fear of falling further increasing the likelihood of falling. For the past few decades, much work has gone into identifying those likely of falling or those who are stable by determining features that distinguish fallers from non-fallers. The holy grail of such an identification scheme would inform how much perturbation the subject can reject, which is also known as the basin of stability. The more perturbation that can be rejected, the larger the basin of stability is and the more stable the individual is. However, determining this basin of stability experimentally is an impractical task. Rather than performing perturbation experiments, recent advances in control theory and reachability analysis allow us to compute this basin of stability in simulation.In this thesis, we present a personalized and automated framework for computing the basin of stability for human motion. To do this, we first develop a tool to compute the basin of stability for dynamical systems and apply this to human motion. The utility of this framework is illustrated on the Sit-to-Stand task, though it can handle more general motions such as gait. The framework is broken down into three components. First, a representative hybrid model is chosen for the standing motion. Second, a controller is constructed to track the motion using optimal control and PD control. Third, using recent advances in hybrid occupation measures, an outer-approximation of the basin of stability is computed. We study the Sit-to-Stand action of 15 subjects (10 young and 5 older) and the computed basin of stability can differentiate between less and more stable Sit-to-Stand strategies. The contributions are the first steps towards developing a numerical method for determining the basin of stability of human motion.
Subjects/Keywords: Electrical engineering; Biomechanics; Robotics; Basin of Stability; Lyapunov; Optimization; Reachability; Sit to Stand; Stability Analysis
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APA (6th Edition):
Shia, V. A. (2016). A Framework for Computing the Stability of Human Motion. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/5pf9g7v9
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shia, Victor Andrew. “A Framework for Computing the Stability of Human Motion.” 2016. Thesis, University of California – Berkeley. Accessed February 25, 2020.
http://www.escholarship.org/uc/item/5pf9g7v9.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shia, Victor Andrew. “A Framework for Computing the Stability of Human Motion.” 2016. Web. 25 Feb 2020.
Vancouver:
Shia VA. A Framework for Computing the Stability of Human Motion. [Internet] [Thesis]. University of California – Berkeley; 2016. [cited 2020 Feb 25].
Available from: http://www.escholarship.org/uc/item/5pf9g7v9.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shia VA. A Framework for Computing the Stability of Human Motion. [Thesis]. University of California – Berkeley; 2016. Available from: http://www.escholarship.org/uc/item/5pf9g7v9
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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