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The Ohio State University
1.
Dougherty, Bradley Edward.
Visual and Demographic Factors in Bioptic Driving Training
and Road Safety.
Degree: PhD, Vision Science, 2013, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1366284836 
► Bioptic telescopic spectacles (BTS) allow people with vision impairment to obtain driving licensure even when their visual acuity does not meet normal state standards. BTS…
(more)
▼ Bioptic telescopic spectacles (BTS) allow people with
vision impairment to obtain driving licensure even when their
visual acuity does not meet normal state standards. BTS are
spectacles with a small telescope implanted in one or both of the
lenses. The telescope is used for brief periods during driving to
spot distant targets such as road signs and traffic signals. The
study described in this dissertation examines visual and
demographic associations among obtaining a bioptic driving license,
training and road testing results, and motor vehicle collisions in
patients with low vision. The study also compares the
collision
rate of bioptic drivers to that of a control group of non-bioptic
drivers matched on age and sex. A retrospective study of medical
records was completed for patients examined for entry into the Ohio
bioptic driving program at the College of Optometry at The Ohio
State University over a five year period. Data were collected on
visual factors, documented driver training, licensure testing
results, and post-licensure driving record. No significant
associations were found among visual and demographic factors and
obtaining licensure after an initial vision examination. Several
factors were significantly associated with the amount of training
documented for candidates for licensure, including age and previous
non-bioptic driving experience. The amount of training documented
was associated with road testing results, but not with driving
safety after licensure. Previous driving experience was also
significantly associated with occurrence of motor vehicle
collisions (MVC) in bioptic drivers, with drivers without previous
experience having approximately 2.5 times as many collisions per
year of licensure than those with previous experience. Other
significant associations with MVC in bioptic drivers included age
and the number of non-
collision related convictions. Nystagmus was
independently associated with MVC, but no other patient visual
factors were associated with MVC. The rate of MVC per year for
bioptic drivers was significantly greater than that of a group of
control drivers matched on age and sex. This is consistent with
past studies of bioptic
collision rates. It is also consistent with
past findings that groups with various medical restrictions have
higher
collision rates than control groups. This study does not
address driving exposure in terms of actual mileage driven by
bioptic drivers, and so no conclusions can be made regarding the
rate of
collision per mile driven for bioptic drivers, the visual
or demographic associations with that figure, or how bioptic
drivers compare to non-bioptic drivers in terms of collisions per
mile driven.
Advisors/Committee Members: Raasch, Thomas (Advisor).
Subjects/Keywords: Ophthalmology; Optics; Public Health; Public Policy; Transportation; Biomedical Research; Health Sciences; bioptic driving; low vision; visual impairment; vision; bioptic telescopic spectacles; visual acuity; contrast sensitivity; motor vehicle collision; visual field; training; road test; driving performance
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APA (6th Edition):
Dougherty, B. E. (2013). Visual and Demographic Factors in Bioptic Driving Training
and Road Safety. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1366284836
Chicago Manual of Style (16th Edition):
Dougherty, Bradley Edward. “Visual and Demographic Factors in Bioptic Driving Training
and Road Safety.” 2013. Doctoral Dissertation, The Ohio State University. Accessed January 24, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1366284836.
MLA Handbook (7th Edition):
Dougherty, Bradley Edward. “Visual and Demographic Factors in Bioptic Driving Training
and Road Safety.” 2013. Web. 24 Jan 2021.
Vancouver:
Dougherty BE. Visual and Demographic Factors in Bioptic Driving Training
and Road Safety. [Internet] [Doctoral dissertation]. The Ohio State University; 2013. [cited 2021 Jan 24].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1366284836.
Council of Science Editors:
Dougherty BE. Visual and Demographic Factors in Bioptic Driving Training
and Road Safety. [Doctoral Dissertation]. The Ohio State University; 2013. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1366284836
University of Texas – Austin
2.
Geng, Sunxiao.
Environmental characteristics around hotspots of pedestrian-automobile collision in the city of Austin.
Degree: MSin Community and Regional Planning, Community and Regional Planning, 2014, University of Texas – Austin
URL: http://hdl.handle.net/2152/25873
► The increasingly serious pedestrian safety issue in the City of Austin aroused the concern. Other than conducting quantitative analysis at aggregate level via collecting and…
(more)
▼ The increasingly serious pedestrian safety issue in the City of Austin aroused the concern. Other than conducting quantitative analysis at aggregate level via collecting and examining the secondary data extracted from the existing datasets, the authors shifted towards the disaggregate level analysis, focusing on twenty-six hotspots of pedestrian collisions via mixed method research. Qualitative data was collected in the field survey to precisely capture the contextual features of
collision locations, and was interpreted and coded as explanatory variables for the quantitative analysis. Instead of the frequency of pedestrian
collision, crash rate measured by incident count per million pedestrians was the dependent variable to identify the factors truly influencing the pedestrian safety issue, not just the total number of walkers. The stepwise bivariate analysis and negative binomial regression examined the association between pedestrian
collision rate and independent variables. Finally, the average block length, speed limit posted, sidewalk condition, and the degree of proximity to major pedestrian attractors were statistically significant factors correlating with the pedestrian
collision risk.
Advisors/Committee Members: Jiao, Junfeng (advisor), Paterson, Robert G. (advisor).
Subjects/Keywords: Pedestrian collision rate; Measures of field survey; Bivariate test and negative binomial regression; Block length
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APA (6th Edition):
Geng, S. (2014). Environmental characteristics around hotspots of pedestrian-automobile collision in the city of Austin. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/25873
Chicago Manual of Style (16th Edition):
Geng, Sunxiao. “Environmental characteristics around hotspots of pedestrian-automobile collision in the city of Austin.” 2014. Masters Thesis, University of Texas – Austin. Accessed January 24, 2021.
http://hdl.handle.net/2152/25873.
MLA Handbook (7th Edition):
Geng, Sunxiao. “Environmental characteristics around hotspots of pedestrian-automobile collision in the city of Austin.” 2014. Web. 24 Jan 2021.
Vancouver:
Geng S. Environmental characteristics around hotspots of pedestrian-automobile collision in the city of Austin. [Internet] [Masters thesis]. University of Texas – Austin; 2014. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/2152/25873.
Council of Science Editors:
Geng S. Environmental characteristics around hotspots of pedestrian-automobile collision in the city of Austin. [Masters Thesis]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/25873
University of Windsor
3.
Jiang, Xian Jian.
Real Time Predictive Speed Analysis for High Speed Rail Collision Test.
Degree: MS, Computer Science, 2015, University of Windsor
URL: https://scholar.uwindsor.ca/etd/5441
► In a real train collision test, a train locomotive needs to be propelled on a straight, guided path, to a particular speed, at which…
(more)
▼ In a real train
collision test, a train locomotive needs to be propelled on a straight, guided path, to a particular speed, at which time the train locomotive is released to coast down towards a barrier where it is required to crash at a desired speed. The current control of the release speed and location is based on theoretical data and previous experience which leads to less accuracy in the actual crash speed. In this research work, the goal is to make improvements in a typical real train
collision test that will help obtain a more accurate crash speed and release location by controlling the force release precisely. The contribution of this research work is to implement a solution to simulate the behavior of the propulsion system, and trigger an algorithm to calculate the required release speed and location more accurately and quickly.
Advisors/Committee Members: Wu, Dan.
Subjects/Keywords: coast down; collision test; crash speed; force release; release location; release speed
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APA (6th Edition):
Jiang, X. J. (2015). Real Time Predictive Speed Analysis for High Speed Rail Collision Test. (Masters Thesis). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/5441
Chicago Manual of Style (16th Edition):
Jiang, Xian Jian. “Real Time Predictive Speed Analysis for High Speed Rail Collision Test.” 2015. Masters Thesis, University of Windsor. Accessed January 24, 2021.
https://scholar.uwindsor.ca/etd/5441.
MLA Handbook (7th Edition):
Jiang, Xian Jian. “Real Time Predictive Speed Analysis for High Speed Rail Collision Test.” 2015. Web. 24 Jan 2021.
Vancouver:
Jiang XJ. Real Time Predictive Speed Analysis for High Speed Rail Collision Test. [Internet] [Masters thesis]. University of Windsor; 2015. [cited 2021 Jan 24].
Available from: https://scholar.uwindsor.ca/etd/5441.
Council of Science Editors:
Jiang XJ. Real Time Predictive Speed Analysis for High Speed Rail Collision Test. [Masters Thesis]. University of Windsor; 2015. Available from: https://scholar.uwindsor.ca/etd/5441
Linköping University
4.
Kivrikis, Andreas.
Development and Evaluation of Multiple Objects Collision Mitigation by Braking Algorithms.
Degree: Electrical Engineering, 2004, Linköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2676
► A CMbB system is a system that with the help of sensors in the front of a car detects when a collision in unavoidable.…
(more)
▼ A CMbB system is a system that with the help of sensors in the front of a car detects when a collision in unavoidable. When a situation like that is detected, the brakes are activated. The decision of whether to activate the brakes or not is taken by a piece of software called a decision maker. This software continuously checks for routes that would avoid an object in front of the car and as long as a path is found nothing is done. Volvo has been investigating several different CMbB-systems, and the research done by Volvo has previously focused on decision makers that only consider one object in front of the car. By instead taking all present objects in consideration, it should be possible to detect an imminent collision earlier. Volvo has developed some prototypes but needed help evaluating their performance. As part of this thesis a testing method was developed. The idea was to test as many cases as possible but as the objects’ possible states increase, the number of test cases quickly becomes huge. Different ways of removing irrelevant test cases were developed and when these ideas were realized in a test bench, it showed that about 98 % of the test cases could be removed. The test results showed that there is clearly an advantage to consider many objects if the cost of increased complexity in the decision maker is not too big. However, the risk of false alarms is high with the current decision makers and several possible improvements have therefore been suggested.
Subjects/Keywords: Reglerteknik; collision mitigation; collision avoidance; evaluation; testing; test bench; Reglerteknik; Automatic control; Reglerteknik
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APA (6th Edition):
Kivrikis, A. (2004). Development and Evaluation of Multiple Objects Collision Mitigation by Braking Algorithms. (Thesis). Linköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2676
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):
Kivrikis, Andreas. “Development and Evaluation of Multiple Objects Collision Mitigation by Braking Algorithms.” 2004. Thesis, Linköping University. Accessed January 24, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2676.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kivrikis, Andreas. “Development and Evaluation of Multiple Objects Collision Mitigation by Braking Algorithms.” 2004. Web. 24 Jan 2021.
Vancouver:
Kivrikis A. Development and Evaluation of Multiple Objects Collision Mitigation by Braking Algorithms. [Internet] [Thesis]. Linköping University; 2004. [cited 2021 Jan 24].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2676.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kivrikis A. Development and Evaluation of Multiple Objects Collision Mitigation by Braking Algorithms. [Thesis]. Linköping University; 2004. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2676
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
5.
Kuznetcov, Anton.
Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture.
Degree: Mechanical Engineering, 2017, University of Manitoba
URL: http://hdl.handle.net/1993/32883
► National authorities constantly work on enhancing the crash safety regulations for motorcoaches in North America, promoting further research on the factors affecting passenger safety in…
(more)
▼ National authorities constantly work on enhancing the crash safety regulations for motorcoaches in North America, promoting further research on the factors affecting passenger safety in severe collisions. The thesis presents the results of a comprehensive study on the effect of the acceleration load experienced by a coach passenger compartment during a frontal
collision on passenger safety. As a large variation in seating posture is found among the coach passengers and owing to its high influence on passenger kinematics during a crash, a special methodology is developed to account for posture uncertainty. The study on the influence of the pulse shape on the occupant’s injury criteria is performed numerically using a validated model of the motorcoach sled
test equipped with two belted and two unbelted Anthropomorphic
Test Devices. The results indicate that the probability of an injury for unbelted occupants seating in a comfortable posture can be significantly increased compared to the standard posture specified in the regulations, with up to 113% increase in Head Injury Criterion and a 97% increase in Femur Loads. For the parametric pulse shape variations under the uncertainty of seating posture, the dependence of most of the injury criteria values on pulse shape is found to be insignificant on the scale of the values’ deviations due to stochastic posture alternations. Overall, the obtained results emphasize the importance of accounting for posture variations in both regulation testing and numerical parametric studies. It is suggested that a parametric study can be carried out independently from a posture variation analysis, enabling considerable computational time savings while still accounting for the dispersion of the results. For regulation testing, a preparatory numerical posture variation study is recommended before the physical
test to identify dangerous seating postures for a given impact scenario and to ensure the worst-case scenario is reproduced. The proposed methodology provides the basis for the development of a contemporary approach to the problems of the occupant protection under real-world conditions relying on probabilistic rather than traditional deterministic design philosophy.
Advisors/Committee Members: Telichev, Igor (Mechanical Engineering) (supervisor), Luo, Yunhua (Mechanical Engineering) Shalaby, Ahmed (Civil Engineering) Untaroiu, Costin (Biomedical Engineering and Mechanics, Virginia Tech, Wake Forest University) (examiningcommittee).
Subjects/Keywords: Motorcoach; Frontal Collision; Passenger safety; Posture; Injury criteria; Sled test
…2
Figure 1-2 – Number of Crashes with Fatalities by Collision Type… …2
Figure 1-3 – Fatal Events for Motorcoach Passengers by Collision Type… …3
Figure 2-1 – Sled Test Setup… …41
Figure 3-7 – Energy Conservation for Sled Test Simulation… …43
Figure 3-8 – Deceleration Pulse from the Physical Test…
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APA ·
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Manager
APA (6th Edition):
Kuznetcov, A. (2017). Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/32883
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):
Kuznetcov, Anton. “Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture.” 2017. Thesis, University of Manitoba. Accessed January 24, 2021.
http://hdl.handle.net/1993/32883.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kuznetcov, Anton. “Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture.” 2017. Web. 24 Jan 2021.
Vancouver:
Kuznetcov A. Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture. [Internet] [Thesis]. University of Manitoba; 2017. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/1993/32883.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kuznetcov A. Effect of acceleration time history in motorcoach frontal collision on passenger safety under uncertainty of seating posture. [Thesis]. University of Manitoba; 2017. Available from: http://hdl.handle.net/1993/32883
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Johannes Gutenberg Universität Mainz
6.
Mantel, Anja.
Dynamic distance analysis : new geometric data structures and algorithms for the real-time calculation of tolerance violating regions in the digital mockup process.
Degree: 2015, Johannes Gutenberg Universität Mainz
URL: http://ubm.opus.hbz-nrw.de/volltexte/2015/4102/
► In vielen Industriezweigen, zum Beispiel in der Automobilindustrie, werden Digitale Versuchsmodelle (Digital MockUps) eingesetzt, um die Konstruktion und die Funktion eines Produkts am virtuellen Prototypen…
(more)
▼ In vielen Industriezweigen, zum Beispiel in der Automobilindustrie, werden Digitale Versuchsmodelle (Digital MockUps) eingesetzt, um die Konstruktion und die Funktion eines Produkts am virtuellen Prototypen zu überprüfen. Ein Anwendungsfall ist dabei die Überprüfung von Sicherheitsabständen einzelner Bauteile, die sogenannte Abstandsanalyse. Ingenieure ermitteln dabei für bestimmte Bauteile, ob diese in ihrer Ruhelage sowie während einer Bewegung einen vorgegeben Sicherheitsabstand zu den umgebenden Bauteilen einhalten. Unterschreiten Bauteile den Sicherheitsabstand, so muss deren Form oder Lage verändert werden. Dazu ist es wichtig, die Bereiche der Bauteile, welche den Sicherhabstand verletzen, genau zu kennen. rnrnIn dieser Arbeit präsentieren wir eine Lösung zur Echtzeitberechnung aller den Sicherheitsabstand unterschreitenden Bereiche zwischen zwei geometrischen Objekten. Die Objekte sind dabei jeweils als Menge von Primitiven (z.B. Dreiecken) gegeben. Für jeden Zeitpunkt, in dem eine Transformation auf eines der Objekte angewendet wird, berechnen wir die Menge aller den Sicherheitsabstand unterschreitenden Primitive und bezeichnen diese als die Menge aller toleranzverletzenden Primitive. Wir präsentieren in dieser Arbeit eine ganzheitliche Lösung, welche sich in die folgenden drei großen Themengebiete unterteilen lässt.rnrnIm ersten Teil dieser Arbeit untersuchen wir Algorithmen, die für zwei Dreiecke überprüfen, ob diese toleranzverletzend sind. Hierfür präsentieren wir verschiedene Ansätze für Dreiecks-Dreiecks Toleranztests und zeigen, dass spezielle Toleranztests deutlich performanter sind als bisher verwendete Abstandsberechnungen. Im Fokus unserer Arbeit steht dabei die Entwicklung eines neuartigen Toleranztests, welcher im Dualraum arbeitet. In all unseren Benchmarks zur Berechnung aller toleranzverletzenden Primitive beweist sich unser Ansatz im dualen Raum immer als der Performanteste.rnrnDer zweite Teil dieser Arbeit befasst sich mit Datenstrukturen und Algorithmen zur Echtzeitberechnung aller toleranzverletzenden Primitive zwischen zwei geometrischen Objekten. Wir entwickeln eine kombinierte Datenstruktur, die sich aus einer flachen hierarchischen Datenstruktur und mehreren Uniform Grids zusammensetzt. Um effiziente Laufzeiten zu gewährleisten ist es vor allem wichtig, den geforderten Sicherheitsabstand sinnvoll im Design der Datenstrukturen und der Anfragealgorithmen zu beachten. Wir präsentieren hierzu Lösungen, die die Menge der zu testenden Paare von Primitiven schnell bestimmen. Darüber hinaus entwickeln wir Strategien, wie Primitive als toleranzverletzend erkannt werden können, ohne einen aufwändigen Primitiv-Primitiv Toleranztest zu berechnen. In unseren Benchmarks zeigen wir, dass wir mit unseren Lösungen in der Lage sind, in Echtzeit alle toleranzverletzenden Primitive zwischen zwei komplexen geometrischen Objekten, bestehend aus jeweils vielen hunderttausend Primitiven, zu berechnen. rnrnIm dritten Teil präsentieren wir eine neuartige, speicheroptimierte Datenstruktur zur Verwaltung der…
Subjects/Keywords: Lageüberprüfung, Kollisionstest, Abstandstest, Datenkompression, Dreieckstest; proximity query, collision test, distance test, data compression, triangle test; Data processing Computer science
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APA (6th Edition):
Mantel, A. (2015). Dynamic distance analysis : new geometric data structures and algorithms for the real-time calculation of tolerance violating regions in the digital mockup process. (Doctoral Dissertation). Johannes Gutenberg Universität Mainz. Retrieved from http://ubm.opus.hbz-nrw.de/volltexte/2015/4102/
Chicago Manual of Style (16th Edition):
Mantel, Anja. “Dynamic distance analysis : new geometric data structures and algorithms for the real-time calculation of tolerance violating regions in the digital mockup process.” 2015. Doctoral Dissertation, Johannes Gutenberg Universität Mainz. Accessed January 24, 2021.
http://ubm.opus.hbz-nrw.de/volltexte/2015/4102/.
MLA Handbook (7th Edition):
Mantel, Anja. “Dynamic distance analysis : new geometric data structures and algorithms for the real-time calculation of tolerance violating regions in the digital mockup process.” 2015. Web. 24 Jan 2021.
Vancouver:
Mantel A. Dynamic distance analysis : new geometric data structures and algorithms for the real-time calculation of tolerance violating regions in the digital mockup process. [Internet] [Doctoral dissertation]. Johannes Gutenberg Universität Mainz; 2015. [cited 2021 Jan 24].
Available from: http://ubm.opus.hbz-nrw.de/volltexte/2015/4102/.
Council of Science Editors:
Mantel A. Dynamic distance analysis : new geometric data structures and algorithms for the real-time calculation of tolerance violating regions in the digital mockup process. [Doctoral Dissertation]. Johannes Gutenberg Universität Mainz; 2015. Available from: http://ubm.opus.hbz-nrw.de/volltexte/2015/4102/
7.
Sahaji, Rajib.
BOTTOM-UP NETWORK SCREENING TO IDENTIFY HIGH COLLISION LOCATIONS FOR THE CITY OF SASKATOON.
Degree: 2012, University of Saskatchewan
URL: http://hdl.handle.net/10388/ETD-2012-06-546
► Safety network screening is used to identify roadway locations (e.g., intersections and roadway segments) for potential safety improvements. Currently, one of the most commonly used…
(more)
▼ Safety network screening is used to identify roadway locations (e.g., intersections and roadway segments) for potential safety improvements. Currently, one of the most commonly used network screening methods in practice is the safety performance function (SPF) based method that uses traffic volume data as an essential input for the screening process. However, the lack of traffic volume data for target roadway locations restricts the applicability of SPF-based network screening methods. The primary objective of this study is to screen Saskatoon’s roadway networks using two existing network screening methods (i.e., the binomial
test and the beta-binomial (BB)
test) that do not require traffic volume as an input.
Previous studies have applied the binomial
test and/or the BB
test without explicitly defining the particular circumstances that indicate which
test is preferable. This study introduced a formal statistical
test known as the overdispersion
test (i.e., “C(α) Test”) to determine which network screening method – the binomial
test or the BB
test – should be used to screen a given study dataset.
The “C(α) Test” was applied to a total of 36 study
collision datasets, including 26 segment
collision datasets, and 10 intersection
collision datasets. (“C (α) Test” results showed that 15 of 26 (58%) segment
collision datasets, and all of 10 intersection
collision datasets contained statistically significant overdispersion at the 95% confidence level (P-value < 0.05). The BB
test was selected as an appropriate network screening method for 15 segment
collision datasets and 10 intersection
collision datasets. The remaining 11 segment
collision datasets that did not contain statistically significant overdispersion (P-value ≥ 0.05) were screened using the binomial
test.
The network screening results for each study location (i.e., a segment or an intersection) in all 36 study datasets were presented in terms of the estimated probability obtained from either the binomial
test or the BB
test. The estimated probability values were used as a ranking measure to select the top 10 or top 30 riskiest locations for both roadway segments and intersections.
The network screening results (estimated probability) for each study segment or intersection in all 36 study
collision datasets were then visually displayed in a set of 36
collision maps that were developed using ArcGIS. The developed GIS-based
collision maps are expected to help engineers in the City of Saskatoon to efficiently select potential locations for deploying specific safety countermeasures that will result in the reduction of a certain configuration of collisions at the screened locations.
As a final component of this thesis, a diagnosis study was performed to identify the most dominant
collision configurations at the top 30 riskiest signalized intersections (among a total of 154 signalized intersections) in Saskatoon. This study quantitatively compared the performance of two existing
collision diagnosis methods (i.e., descriptive data analysis and BB
test), and the…
Advisors/Committee Members: Park, Peter Y., Hawkes, Christopher D., Sparks, Gordon A., Berthelot, Curtis, Gardiner, Angela.
Subjects/Keywords: Bottom-up Network Screening; Beta-binomial Test; Collision Diagnosis; GIS Collision Maps
…most frequent collision configurations based on the BB test results, 2005-2009. ...... 155
x… …binomial test
and/or BB test) for identifying and ranking high collision locations with and… …method than the binomial test;
3. To develop a set of GIS collision maps as a tool of… …diagnosis methods - descriptive data analysis and BB test – using the collision information from… …test.
2.2.2.1.
Binomial Test
The binomial test assumes that a collision occurrence at a…
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APA ·
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APA (6th Edition):
Sahaji, R. (2012). BOTTOM-UP NETWORK SCREENING TO IDENTIFY HIGH COLLISION LOCATIONS FOR THE CITY OF SASKATOON. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/ETD-2012-06-546
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):
Sahaji, Rajib. “BOTTOM-UP NETWORK SCREENING TO IDENTIFY HIGH COLLISION LOCATIONS FOR THE CITY OF SASKATOON.” 2012. Thesis, University of Saskatchewan. Accessed January 24, 2021.
http://hdl.handle.net/10388/ETD-2012-06-546.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sahaji, Rajib. “BOTTOM-UP NETWORK SCREENING TO IDENTIFY HIGH COLLISION LOCATIONS FOR THE CITY OF SASKATOON.” 2012. Web. 24 Jan 2021.
Vancouver:
Sahaji R. BOTTOM-UP NETWORK SCREENING TO IDENTIFY HIGH COLLISION LOCATIONS FOR THE CITY OF SASKATOON. [Internet] [Thesis]. University of Saskatchewan; 2012. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10388/ETD-2012-06-546.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sahaji R. BOTTOM-UP NETWORK SCREENING TO IDENTIFY HIGH COLLISION LOCATIONS FOR THE CITY OF SASKATOON. [Thesis]. University of Saskatchewan; 2012. Available from: http://hdl.handle.net/10388/ETD-2012-06-546
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Southern California
8.
Yun, Hae-Bum.
Analytical and experimental studies of modeling and
monitoring uncertain nonlinear systems.
Degree: PhD, Civil Engineering (Structural Mechanics), 2007, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/528810/rec/819
► The development of effective structural health monitoring (SHM) methodologies is imperative for the efficient maintenance of important structures in aerospace, mechanical and civil engineering. Based…
(more)
▼ The development of effective structural health
monitoring (SHM) methodologies is imperative for the efficient
maintenance of important structures in aerospace, mechanical and
civil engineering. Based on reliable condition assessment, the
owners of monitored structures can expect two important benefits:
to avoid catastrophic accidents by detecting various types of
structural deterioration during operation, and to establish
efficient maintenance means and time schedule to reduce maintenance
costs.; A vibration-based SHM methodology is evaluated for change
detection in nonlinear systems that can be frequently seen in many
engineering fields. The proposed methodology is advantageous over
existing SHM methodologies regarding the following aspects:
feasible to detect small changes in complex nonlinear systems,
possible to make physical interpretation of detected changes, and
possible to quantify the uncertainty associated with the change
detection.; A series of analytical and experimental studies was
performed to investigate various important issues in modeling and
monitoring of uncertain nonlinear systems. Different parametric and
non-parametric identification methods were compared for monitoring
purpose using full-scale nonlinear viscous dampers for seismic
mitigation in civil structures. Then, the effects of uncertainty on
change detection performance were investigated. Two types of
uncertainty were studied: measurement uncertainty and system
characteristic uncertainty. For measurement uncertainty, three
different types of full-scale nonlinear viscous dampers were used
to validate the proposed SHM methodology when the dampers' response
was polluted with random noise. For system characteristic
uncertainty, a semi-active magneto-rheological damper whose system
characteristics were determined through user controllable input
current was used. Statistical pattern recognition methods were
studied to detect relatively small changes in nonlinear systems
with different uncertainty types. The Bootstrap method, a
statistical data resampling technique, was also studied to estimate
the uncertainty bounds of change detection when the measurement
data are insufficient for reliable statistical inference.; A
web-based real-time bridge monitoring system was developed and used
for a forensic study involving a cargo ship
collision with the
Vincent Thomas Bridge, a critical suspension bridge in the
metropolitan Los Angeles region.
Advisors/Committee Members: Sami F. Masri (Committee Chair), Carter Wellford (Committee Member), Jiin-Jen Lee (Committee Member), John P. Caffrey (Committee Member), Roger G. Ghanem (Committee Member).
Subjects/Keywords: structural health monitoring; system identification; Restoring Force Method; artificial neural networks; Hypothesis Test; Bootstrap Method; statistical pattern recognition; support vector machines; k-means clustering; error analysis; detection theory; Natural Excitation Technique; Eigensystem Realization Algorithm; full-scale viscous dampers; magneto-rheological dampers; suspension bridge; web-based real-time bridge monitoring system; ship-bridge collision
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APA (6th Edition):
Yun, H. (2007). Analytical and experimental studies of modeling and
monitoring uncertain nonlinear systems. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/528810/rec/819
Chicago Manual of Style (16th Edition):
Yun, Hae-Bum. “Analytical and experimental studies of modeling and
monitoring uncertain nonlinear systems.” 2007. Doctoral Dissertation, University of Southern California. Accessed January 24, 2021.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/528810/rec/819.
MLA Handbook (7th Edition):
Yun, Hae-Bum. “Analytical and experimental studies of modeling and
monitoring uncertain nonlinear systems.” 2007. Web. 24 Jan 2021.
Vancouver:
Yun H. Analytical and experimental studies of modeling and
monitoring uncertain nonlinear systems. [Internet] [Doctoral dissertation]. University of Southern California; 2007. [cited 2021 Jan 24].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/528810/rec/819.
Council of Science Editors:
Yun H. Analytical and experimental studies of modeling and
monitoring uncertain nonlinear systems. [Doctoral Dissertation]. University of Southern California; 2007. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/528810/rec/819
. 
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