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-
- Description:
- Non-destructive evaluation (NDE) techniques have been used for a number of years to provide quality control of construction procedures for drilled shafts and driven concrete piles. In particular sonic echo and impulse response methods have been used extensively to check lengths and continuity of newly-installed foundations. In recent years, the...
- Keyword:
- Test section , Deep foundation , and Nondestructive testing
- Creator:
- Richard J. Finno , Peter W. Osborn, and Sarah L. Gassman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997-06
- Resource Type:
- Report
-
- Description:
- An empirical procedure for fitting a complementary error function (erfc) to settlement and lateral ground movement data in a direction parallel to an excavation support wall is proposed based on extensive optical survey data obtained around a 12.8 m excavation in Chicago. The maximum ground movement and the height and...
- Keyword:
- Excavation, Clay soils , Ground control , and Performance data
- Creator:
- Jill Frances Roboski
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Research Paper
-
- Description:
- Several three-dimensional effects were observed in the performance monitoring data collected during excavation for the Ford Engineering Design Center (FEDC) in Evanston, Illinois. These responses are related to lateral deformations of the soil around the excavation walls, forces in the cross-lot and diagonal bracing that supported the temporary wall and...
- Keyword:
- Excavation, Three-dimensional analysis, Ground control, and Clay soils
- Creator:
- James Tanner Blackburn and Richard J. Finno
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006
- Resource Type:
- Research Paper
-
- Description:
- This paper presents the results of 159 finite element simulations conducted to define the effects of excavation geometry, i.e., length, width and depth of excavation, wall system stiffness, and factor of safety against basal heave on the 3-dimensional ground movements caused by excavation through clays. The results of the analyses...
- Keyword:
- Excavation, Three-dimensional analysis, and Nondestructive testing
- Creator:
- Jill Frances Roboski, James Tanner Blackburn, and Richard J. Finno
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006
- Resource Type:
- Research Paper
-
- Description:
- Successful use of monitoring data to update performance predictions of supported excavations depends equally on reasonable numerical simulations of performance, the type of monitoring data used as observations, and the inverse analysis techniques used to minimize the difference between predictions and observed performance. This paper summarizes each of these factors...
- Keyword:
- Excavation, Nondestructive testing , and Ground control
- Creator:
- Richard J. Finno
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Two numerical procedures are described that quantitatively identify a set of constitutive parameters that best represents observed ground movement data associated with a deep excavations in urban environments. This inverse problem is solved by minimizing an objective (or error) function of the weighted least-squares type that contains the difference between...
- Keyword:
- Ground control and Nondestructive testing
- Creator:
- Cecilia Rechea Bernal
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Performance monitoring of deep excavations typically includes slope inclinometers, optical surveying of soil deformation, tiltmeters and strain gages. Current monitoring data collection and processing requires time consuming site visits and manual data reduction by project engineers. Development of robotic and remote access geotechnical instrumentation conceptually allows processed data to be...
- Keyword:
- Excavation, Ground control, and Nondestructive testing
- Creator:
- Miltiadis Langousis
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007-03
- Resource Type:
- Masters Thesis
-
- Description:
- This paper describes developments of integrated tools for predicting, monitoring, and controlling ground movements associated with excavations in urban areas. Successful use of monitoring data to update performance predictions of supported excavations depends equally on reasonable numerical simulations of performance, the type of monitoring data used as observations, and the...
- Keyword:
- Ground control and Nondestructive testing
- Creator:
- Richard J. Finno and Youssef M. A. Hashash
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Research Paper
-
- Description:
- This presentation provides information on the the project "Use Of High-Performance A710 Grade B Steel in Construction of Lake Villa, IL Bridge". The presentation was delivered by Morris E. Fine, Semyon Vaynman, and Nunzio Mario Biondolillo on June 14, 2006.
- Keyword:
- Nondestructive testing
- Creator:
- Morris E. Fine , Semyon Vaynman, and Nunzio Mario Biondolillo
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006-06-14
- Resource Type:
- Presentation
-
- Description:
- This final report contains information on years 6-7-8 (2004-2007) of TEA-21 funded projects designated A487, W420, and A212. The report was submitted by Morris E. Fine and Semyon Vaynman in 2007.
- Keyword:
- Nondestructive testing
- Creator:
- Morris E. Fine and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Report
-
- Description:
- During the past several years an easily weldable, high strength (more than 75 ksi yield), high impact fracture toughness steel (NUCu steel) has been investigated at Northwestern University with bridge applications in mind. For good weldability without pre-heating and post-heating, the carbon content of the steel was kept low and...
- Keyword:
- NUCu steel
- Creator:
- Gautam Ghosh, Morris E. Fine, and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1996-09-27
- Resource Type:
- Report
-
- Description:
- Northwestern University developed copper-precipitation-hardened, high-performance weathering steel (NUCu 70W Steel) that is produced by hot rolling after casting and then air-cooling. Due to simple processing the steel is fabricated at lower cost than competing high-performance steels that require quench and tempering. NUCu 70W steel can be easily welded without pre-...
- Keyword:
- NUCu steel
- Creator:
- Morris E. Fine and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003-07-18
- Resource Type:
- Report
-
- Description:
- This brochure contains information on the NUCu Steel ASTM A-710 Grade B project published at Northwestern University's Infrastructure Technology Institute with the support of the Illinois Department of Transportation. The brochure includes further explanation to Current and Potential Applications, Chemical Composition and Steel Processing, Mechanical and Fracture Properties, Corrosion, Welding,...
- Keyword:
- NUCu steel
- Creator:
- Morris E. Fine , Semyon Vaynman, and Christopher Hahin
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Other
-
- Description:
- Northwestern University developed copper-precipitation-hardened, high-performance weathering steel (NUCu 70W Steel) that is produced by hot rolling after casting and then air-cooling. Due to simple processing the steel is fabricated at lower cost than competing high-performance steels that require quench and tempering. NUCu 70W steel can be easily welded without pre-...
- Keyword:
- NUCu steel
- Creator:
- Morris E. Fine and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Report
-
- Description:
- This is the final project report "A Process Control System for the John F. Kennedy Memorial Bridge" by Pablo Durango-Cohen, 2011.
- Keyword:
- Structural health monitoring
- Creator:
- David J. Corr, Yikai Chen, and Pablo Durango-Cohen
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011
- Resource Type:
- Report
-
- Description:
- This is the final report on the project "A knowledge Management Platform for Infrastructure Performance Modeling" by Pablo Durango-Cohen.
- Keyword:
- Infrastructure Technology Institute
- Creator:
- Pablo Durango-Cohen
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- Experimental Time Domain Reflectometry (TDR) data obtained from the field are compared with numerical simulations using a finite-difference solution of the transmission line equations. The model simulates transmission of a voltage pulse along a lossy coaxial cable where deformities on the cable, such as crimps and shears, are represented by...
- Keyword:
- Time-domain reflectometry and Structural health monitoring
- Creator:
- Stéphane P. Bordas
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1998-12
- Resource Type:
- Masters Thesis
-
- Description:
- How can gatekeeping theory in the circulation of cultural objects, including knowledge production, inform the way cultural sociology investigates the role of the producer and the cultural object as “gated” entities? Using the case of producers working under the rubric of “Contemporary African art” to investigate opportunities and restrictions to...
- Keyword:
- trading chip, boundary object, Africanness, and Contemporary African art
- Subject:
- Communications and the Arts and Social Sciences
- Creator:
- Matlhare, Sakhile
- Contributor:
- Fine, Gary, Griswold, Wendy, and Berzock, Kathleen
- Owner:
- Sakhile Matlhare
- Language:
- English
- Date Uploaded:
- 07/11/2017
- Date Modified:
- 07/11/2017
- Date Created:
- 2017
- Resource Type:
- Dissertation
- Alternate Identifier:
- https://doi.org/10.21985/N20H2F
-
- Description:
- In his essay on Mali, Bruce Whitehouse of Lehigh University shows how failures of elected leaders, state institutions, and external donors can shift power to the streets and an uncertain contest among armed forces.
- Keyword:
- democracy and Mali
- Creator:
- Bruce Whitehouse
- Depositor:
- Chris Diaz
- Owner:
- Richard A Joseph
- Publisher:
- AFRICAPLUS
- Date Uploaded:
- 07/07/2017
- Date Modified:
- 07/07/2017
- Date Created:
- 2013-04-19
- Resource Type:
- Article
-
- Keyword:
- Disordered Consciousness, Neurobehavioral, Assessment, Brain Injury, and Patient Outcome
- Creator:
- Theresa Pape, Allen Heinemann, Trudy Mallinson, James Kelly, Sandra Lundgren, and Ann Guernon
- Owner:
- Theresa L Bender Pape
- Date Uploaded:
- 07/07/2017
- Date Modified:
- 07/07/2017
- Alternate Identifier:
- https://doi.org/10.21985/N2908B
-
- Description:
- This presentation is intended to provide background on the principles involved in geotechnical and infrastructure applications of Time Domain Reflectometry (TDR). TDR is basically radar in which a voltage pulse is launched along a coaxial cable. A reflection of the voltage pulse occurs at every location where the cable is...
- Keyword:
- Time-domain reflectometry and Structural health monitoring
- Creator:
- Charles H. Dowding and Kevin M. O'Connor
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Library
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2000
- Resource Type:
- Report
-
- Description:
- Time Domain Reflectometry (TDR) is a versatile technology amenable to a variety of measurements and nondestructive monitoring of infrastructure conditions. It can be utilized to monitor deformation of soil/rock and structures, monitor changes in fluid levels, and monitor water content of soils. Furthermore, this monitoring can be automated using systems...
- Keyword:
- Time-domain reflectometry and Structural health monitoring
- Creator:
- Charles H. Dowding and Kevin M. O'Connor
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Library
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2001
- Resource Type:
- Report
-
- Description:
- Two longwall coalmine panels were mined at a depth of approximately 156 m (510 ft) beneath I-70 east of Washington, Pennsylvania such that it crossed the width of one panel at two locations. The Pennsylvania Department of Transportation (PennDoT) assumed responsibility for real time monitoring of both ground deformation and...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding, Kevin M. O'Connor, David J. Whitlatch , and Ronald J. Clark
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2001
- Resource Type:
- Report
-
- Description:
- This paper reviews the new field of geo-measurement with metallic cable time domain reflectometry (TDR) for surveillance of transportation facilities. TDR is radar in a coaxial cable, and is especially advantageous for remote monitoring because of its inherently digital nature. Advances can be separated into those that leverage use of...
- Keyword:
- Structural health monitoring and Time-domain reflectometry
- Creator:
- Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011-07-27
- Resource Type:
- Research Paper
-
- Description:
- This thesis combines field and laboratory measurements with three dimensional (3D) finite element analysis (FEM) to demonstrate the use of Time Domain Reflectometry (TDR) cable-grout composites to measure localized shearing in soft soil. Past field installations of TDR cable-grout composites in rock have lead to its widespread use in the...
- Keyword:
- Structural health monitoring and Time-domain reflectometry
- Creator:
- James Tanner Blackburn
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2002-04
- Resource Type:
- Masters Thesis
-
- Description:
- This thesis presents the application of Time Domain Reflectometry technology in nine case studies. Presented in detail are cable and grout installation techniques, data acquisition instrumentation and autonomous real time monitoring of soil deformation using TDR. The goal of this work is to summarize the state of the technology in...
- Keyword:
- Structural health monitoring
- Creator:
- Matthieu L. Dussud
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2002-12
- Resource Type:
- Masters Thesis
-
- Description:
- This file contains application materials to Crossbow's Smart Dust Challenge Contest by Mat Kotowsky and Hasan Ozer.
- Keyword:
- Structural health monitoring
- Creator:
- Matthew P. Kotowsky and Hasan Ozer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-12
- Resource Type:
- Project
-
- Description:
- This file contains the poster on "Wireless Data Acquisition System in Autonomous Crack Monitoring Projects" from Crossbow Smart Dust Challenge created by Mat Kotowsky, Hasan Ozer, and David Kosnik.
- Keyword:
- Structural health monitoring
- Creator:
- David Kosnik , Matthew P. Kotowsky , and Hasan Ozer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Poster
-
- Description:
- This file contains power-point slides of Application to Crossbow’s Smart Dust Challenge Contest, title "Wireless Data Acquisition System" by Mat Kotowsky and Hasan Ozer. The presentation was delivered at University of California, Berkeley on February 11, 2005.
- Keyword:
- Structural health monitoring
- Creator:
- Hasan Ozer and Matthew P. Kotowsky
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005-02-11
- Resource Type:
- Presentation
-
- Description:
- This paper describes qualification of devices to measure sub micro-meter changes in crack width, which is the basis of autonomous crack monitoring for control of blasting vibrations. Performance of LVDT, eddy current and potentiometer sensors to monitor long-term and transient displacements will be described. Potentiometers are attractive for wireless measurement,...
- Keyword:
- Structural health monitoring
- Creator:
- Hasan Ozer, Charles H. Dowding, and Dan Marron
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Miniaturized, wireless instrumentation is now a reality and this thesis describes development of such a system to monitor crack response. Comparison of environmental (long-term) and blast-induced (dynamic) crack width changes in residential structures has lead to a new approach to monitoring and controlling construction vibrations. In wireless systems transducer power...
- Keyword:
- Structural health monitoring
- Creator:
- Hasan Ozer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Masters Thesis
-
- Description:
- Mining near the town of Blanford, Indiana for a number of years has led to an opportunity for Peabody Coal Company to study and compare environmental and blast effects. Such a comparison allows description of any blast effects relative to those caused by common environmental changes, which should be familiar...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding and Spencer W. Lucole
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Library
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1988-01-28
- Resource Type:
- Report
-
- Keyword:
- ratchet, charge transport, non-equilibrium, and organic semiconductor
- Creator:
- Bryan Lau, Ofer Kedem, Mark A. Ratner, and Emily A. Weiss
- Owner:
- Ofer Kedem
- Publisher:
- National Academy of Sciences of the United States of America
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 07/31/2017
- Resource Type:
- Dataset
- Alternate Identifier:
- https://doi.org/10.21985/N2KD32
-
- Description:
- Public concern over construction vibration-induced cracking has led to the development of a radically new approach to vibration, an autonomous crack comparometer (ACC). This thesis chronicles the first step of developing equipment and software necessary for this system. The new system will automatically compare longterm weather induced micrometer changes in...
- Keyword:
- Structural health monitoring
- Creator:
- Damian R. Siebert
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2000-06
- Resource Type:
- Masters Thesis
-
- Description:
- The thesis describes the second phase of development of the Autonomous Crack Comparometer (ACC) system to incorporate measurements of ground motions and add several changes in the autonomous operation. In order to obtain the ground motion and air blast data, four additional transducers have been added. There are now a...
- Keyword:
- Structural health monitoring
- Creator:
- Michaël Louis
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2000
- Resource Type:
- Masters Thesis
-
- Description:
- Construction is omnipresent in modern-day America. It's the sound and vibration of a nation scrambling to keep up with its burgeoning population. In most states, allowable construction-induced ground motions range from 0.5 to 1.0 inches per second (in/sec) and under certain conditions up to 2.0 in/sec. However, ground motion as...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2001
- Resource Type:
- Report
-
- Description:
- This thesis consists of the data and analysis of structural responses for two different studies: the Office of Surface Mining (OSM) study of the velocity response of “atypical” residential structures and the Autonomous Crack Monitoring (ACM) study. The main basis of this thesis was to do additional analysis on a...
- Keyword:
- Structural health monitoring
- Creator:
- Laureen M. McKenna
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2002-03
- Resource Type:
- Masters Thesis
-
- Description:
- This appendix synthesizes micrometer changes in crack width in response to both long term (environmental) and transient (blast vibration) of four of the structures in the main body. The appendix begins with a description of the genesis of the study and instruments employed. Response of the distressed wood-framed structure in...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding and Laureen M. McKenna
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003
- Resource Type:
- Other
-
- Description:
- Autonomous Crack Measurement (ACM) facilitates simultaneous measurement of crack response to environmental changes and vibrations produced by various construction activities. Dual-purpose crack displacement sensors measure crack response, while the vibration environment is defined by standard seismological transducers and the weather environment is defined as changes in temperature and humidity. This...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Mickey L. Snider
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003-05
- Resource Type:
- Masters Thesis
-
- Description:
- All structures have cosmetic cracks, which have no influence on structural integrity and usually remain unremarked until the structure’s occupants sense ground vibrations. Such vibrations are often associated with engineering activity, but are rarely responsible for cracks. However, this is difficult to prove without scientific basis. Automated Crack Monitoring (ACM)...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Markian B. Petrina
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-08
- Resource Type:
- Masters Thesis
-
- Description:
- Cosmetic cracks are very common in structures, and most of the time they remain unnoticed and do not decrease the structural integrity. Although these cracks are unremarkable and barely noticeable, occupants become concerned about these cracks when construction occurs nearby. In order to investigate the true nature of these cracks,...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Remi Baillot
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-12
- Resource Type:
- Masters Thesis
-
- Description:
- In early 2001, a sinkhole formed directly under State Road 66 near the city of Sebring in Highlands County, Florida. The Florida DOT built a land bridge over the sinkhole and the road was reopened to traffic. Since SR-66 is an important regional trucking route, it was decided that the...
- Keyword:
- Structural health monitoring
- Creator:
- David E. Kosnik
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Report
-
- Description:
- Crack and structural response to construction trench blasting was measured in a woodframe house with a stucco exterior. Blasts at distances between 232 m to 368 m produced peak particle velocities (PPV) and air blast over pressures (AB) of 9 mm/sec and 0.02 kPa (123 dB), respectively. Structural response velocities...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding , Catherine T. Aimone-Martin, and Vitor L. Rosenhaim
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Research Paper
-
- Description:
- This thesis summarizes two further developments of the Autonomous Crack Monitoring (ACM) system, which facilitates simultaneous measurement of crack response to environmental changes and various dynamic events. The first component was measurement of crack responses in three different materials and locations in a residential structure subjected to ground vibrations produced...
- Keyword:
- Structural health monitoring
- Creator:
- Mike J. Waldron
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006-06
- Resource Type:
- Masters Thesis
-
- Description:
- This thesis summarized the qualification and testing of two commercial Autonomous Crack Monitoring (ACM) systems for use in measuring micrometer displacement of cracks. Qualification involved the assessment of both laboratory and field performance in a residential structure subjected to nearby quarry blasting for the production of roadway aggregate. Aggregate and...
- Keyword:
- Structural health monitoring
- Creator:
- Brandon G. Hughes
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006-06
- Resource Type:
- Masters Thesis
-
- Description:
- A unique judicial opportunity allowed measurement of the response of three cracks in residential structure to blasting for underground aggregate mining. Instrumented cracks were located in the interior basement CMU mortar and upstairs dry wall as well as exterior brick work. The dynamic environment was unusual. Even though the blasting...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Mike Waldron, G.F. Revey, and C.H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Micro-meter dynamic crack responses in a two story structure to rock blasting- and wind gust- excitation are compared to those induced by long term climatological effects. These measurements substantiate the conservancy of the 12.5 mm/s (0.5 in./s) blasting vibration control to protect residential structures against cracking. The test structure was...
- Keyword:
- Micrometers , Blast effect , Structural health monitoring, and Cracking of concrete
- Creator:
- Charles H. Dowding and C. T. Aimone-Martin
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- This paper describes the technology and methods deployed in the continuous autonomous remote monitoring of cracks in interior and exterior walls of a residence near a limestone quarry. The object is to quantitatively compare crack response to blast-induced ground motion to that induced by diurnal temperature changes, weather fronts, and...
- Keyword:
- Cracking of concrete and Structural health monitoring
- Creator:
- David E. Kosnik
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008-03-21
- Resource Type:
- Research Paper
-
- Description:
- In this paper vibratory crack response is compared to that produced by volumetric changes in foundation soils induced by natural events. These natural phenomena include changes in the water table, changes in soil moisture, and formation of ice lenses to name a few. Previous papers have compared vibratory responses of...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- V. Rosenhaim, Catherine Aimone-Martin, Jeffrey Meissner , and Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Research Paper
-
- Description:
- This paper describes the technology and methods deployed in the continuous autonomous remote monitoring of cracks in interior and exterior walls of a residence near a limestone quarry. The objective is to quantitatively compare crack response due to blast-induced ground motion to that induced by diurnal temperature changes, weather fronts,...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- David E. Kosnik
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Research Paper
-
- Description:
- Cosmetic and structural cracks are a large concern for homeowners. Although these cracks can develop from a variety of causes: differential foundation settlement, occupant activity, climatological effects, as well as dynamic events, people tend to look to dynamic events like blasting, construction, or traffic vibrations to be the culprit. This...
- Keyword:
- Crack responses , Structural integrity assessment , and Ground motions
- Creator:
- Jeffrey Meissner and Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- The notion of blasting, even in a controlled setting such as a limestone quarry, can be alarming to residents and business owners within earshot. Because humans are inherently sensitive to blast-induced vibrations, they perceive that the structures in which they live in are equally sensitive. The goal of this project...
- Keyword:
- Ground motion, Concrete block structure, and Structural health monitoring
- Creator:
- Charles H. Dowding and Jeffrey E. Meissner
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- This appendix contains all software used to program the MICA2 motes for Version 1 of the MICA2-based wireless ACM system. This appendix is organized by software directory and only the modified files are included.
- Keyword:
- Structural health monitoring , Wireless sensor networks , and Source code
- Creator:
- Matthew P. Kotowsky
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Software or Program Code
-
- Description:
- Autonomous Crack Monitoring (ACM) and Autonomous Crack Propagation Sensing (ACPS) are two types of structural health monitoring in which characteristics of cracks are recorded over long periods of time. ACM seeks to correlate changes in widths of cosmetic cracks in structures to nearby blasting or construction vibration activity for the...
- Keyword:
- Structural health monitoring and Wireless sensor networks
- Creator:
- Matthew P. Kotowsky
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Masters Thesis
-
- Description:
- This manual describes use of a new hybrid autonomous crack and structural response monitoring (ACSM) system. It is designed as a low cost alternative to the research grade version employing SOMAT’s eDAQ data recording system. The concept is to combine a new field portable, 24 bit, 12 channel seismograph with...
- Keyword:
- Structural monitoring system
- Creator:
- Thomas Koegel
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011
- Resource Type:
- Other
-
- Description:
- This paper describes the details of installation and operation of a commercially- available wireless system to measure response of an interior cosmetic crack in a residential structure over a period of a year. Wireless data loggers managed the response of low power draw potentiometers that measured micrometer changes in crack...
- Keyword:
- structural health monitoring
- Creator:
- Dowding, C.H. , Kotowsky, M., and Koegel, T.
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2012
- Resource Type:
- Research Paper
-
- Description:
- The purpose of this comparative field qualification is to demonstrate the new Kelunji EchoPro hybrid ACSM system and its performance relative to the eDAQ and eko Motes systems. These three systems are installed at a test site in Sycamore, IL, adjacent to an active quarry. Data for this report was...
- Keyword:
- Infrastructure Technology Institute
- Creator:
- Thomas Koegel
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/28/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011
- Resource Type:
- Report
-
- Description:
- A .rar folder with data files for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges", 2010.
- Keyword:
- Dataset
- Creator:
- Guang-Hua Li and Zdenek P. Bazant
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008
- Resource Type:
- Dataset
-
- Description:
- An .xls file with data for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges (A423, A447)", 2010.
- Keyword:
- Dataset
- Creator:
- Kyung-Tae Kim
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Dataset
-
- Description:
- An .xls file with data for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges (A423, A447)", 2010.
- Keyword:
- Dataset
- Creator:
- Qiang Yu
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Dataset
-
- Description:
- An .xls file with data for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges (A423, A447)", 2010.
- Keyword:
- Dataset
- Creator:
- Kyung-Tae Kim
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Dataset
-
- Description:
- Despite a relatively mature technology for its control, corrosion caused by stray current from electrified rapid-transit systems costs the United States approximately $500 million annually. Part of that cost is the result of corrosion of the electrified rapid-transit system itself, and part is the result of corrosion on neighboring infrastructure...
- Keyword:
- Stray current corrosion
- Creator:
- Barlo, Thomas J. and Zdunek, Alan D.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1995-05
- Resource Type:
- Report
-
- Description:
- The finite element method is used to investigate failure mechanisms in pin-hanger connection in aging highway bridges. Bridge pins and hangers are typically considered as critical elements whose failure may result in partial or entire collapse of the structure. The primary function of a pin-hanger connection is to allow for...
- Keyword:
- Structural integrity assessment
- Creator:
- Houcque, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008-06
- Resource Type:
- Dissertation
-
- Description:
- This report shows the results of acoustic emission (AE) monitoring, and provides additional information on the nature of the ultrasonic indications in the north east trunnion shaft.
- Keyword:
- Acoustic emission testing
- Creator:
- Jerome E. Oleksy and David W. Prine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1996-05
- Resource Type:
- Report
-
- Description:
- A remote global monitoring system is being operated on a 65 year old lift bridge in Sturgeon Bay Wisconsin. The system uses both strain gages and clinometers to continuously monitor the "health" of the fracture critical components of the bridge. Ruggedized miniaturized data loggers are locally mounted on the structure...
- Keyword:
- Acoustic emission testing
- Creator:
- Fish, Philip and Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997
- Resource Type:
- Report
-
- Description:
- Current bridge condition determination is based almost entirely on the use of visual inspection. This approach to bridge inspection provides data that is subjective and not traceable. Nondestructive evaluation (NDE) is a tool that in actuality is little used on bridges, but could eliminate much of the subjectivity of the...
- Keyword:
- Acoustic emission testing
- Creator:
- Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1995-05
- Resource Type:
- Report
-
- Description:
- This technical report shows the findings of acoustic emission and strain gage monitoring tests conducted by research engineers of Infrastructure Technology Institute from Northwestern University on April 18, 1997 in Sacramento, California.
- Keyword:
- Acoustic emission testing
- Creator:
- Marron, Daniel and Prine, David W.
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997-04-18
- Resource Type:
- Report
-
- Description:
- This report includes the findings of acoustic emission (AE) tests on the Fremont tied arch bridge in Portland Oregon conducted by research engineers from the Infrastructure Technology Institute of Northwestern University on March 24th, 1997.
- Keyword:
- Acoustic emission testing
- Creator:
- Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997
- Resource Type:
- Report
-
- Description:
- This paper describes application of AE monitoring techniques to localize the sources of large noises in civil structures. These noises occur during operation of moveable portions of a structure in such things as lift bridges and moveable sports stadium roofs. The use of straightforward AE monitoring techniques can provide clear...
- Keyword:
- Acoustic emission testing
- Creator:
- Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Research Paper
-
- Description:
- Kosnik, D. E., Northwestern University . Infrastructure Technology Institute, Department of Civil Environmental Engineering, Robert R. McCormick School of Engineering Applied Science. (2008). A new approach to acoustic emission testing of difficult-to-reach steel bridge details. Evanston, Illinois: Infrastructure Technology Institute/Department of Civil & Environmental Engineering.
- Keyword:
- Acoustic emission testing
- Creator:
- Kosnik, David E.
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008
- Resource Type:
- Research Paper
-
- Description:
- Acoustic emission (AE) testing was used to identify the source of audible “bangs” generated during opening and closing of a large, double-leaf rolling-lift bascule bridge. The data were analyzed using a combination of well-established AE techniques, including first hit analysis (FHA), planar location analysis, and linear location analysis. The FHA...
- Keyword:
- Acoustic emission testing
- Creator:
- Matthew P. Kotowsky , David E. Kosnik, David Corr, and David W. Prine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009-06-10
- Resource Type:
- Report
-
- Description:
- Scour is by far the primary cause of bridge failures in the United States. Scour and other hydraulic effects are particularly threatening because the deterioration is often invisible, hidden beneath turbid water. Many scour monitoring methods attempt to measure the development of scour pockets themselves. However, this is difficult due...
- Keyword:
- Scours at bridges and Tiltmeter
- Creator:
- Kosnik, David and Ng, Steve
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010-02-17
- Resource Type:
- Research Paper
-
- Description:
- Acoustic emission (AE) testing was deployed on details of two large steel Interstate Highway bridges: one cantilever through-truss and one trapezoidal box girder bridge. Quantitative measurements of activity levels at known and suspected crack locations were made by monitoring AE under normal service loads (e.g., live traffic and wind). AE...
- Keyword:
- Acoustic emission testing
- Creator:
- Kosnik, D. E. , Hopwood, T., and Corr, D. J.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Research Paper
-
- Description:
- The Moraceae family includes several species producing edible fruits, including mulberry, fig, breadnut, and osage-orange.
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Witherup, Colby
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2013-05-13
- Resource Type:
- Masters Thesis
-
- Description:
- The underutilized tropical fruit tree, “cempedak” (Artocarpus integer (Thunb.) Merr. , Moraceae), is a major crop in Malaysia but the distribution of genetic diversity in the crop and its putative wild progenitor, “bangkong” (Artocarpus integer var. silvestris Corner), have not been studied. To investigate the diversity and origins of cempedak,...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Wang Mei Hua, Maria
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2014-11-20
- Resource Type:
- Masters Thesis
-
- Description:
- Current ecological restoration efforts seek to restore a target community, maximize biodiversity or provide habitat for rare species. In practice, restoration ecology is often initiated and sustained without knowledge or reverence to the belowground ecosystem processes, though these processes often subtend the long-term sustainability of aboveground and belowground ecological communities.
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Umek, Lauren G.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2007-05-15
- Resource Type:
- Masters Thesis
-
- Description:
- Past efforts to reintroduce the native legume species Desmodium glutinosum and Lespedeza violacea into restored woodlands have not produced self-sustaining populations. Proposed factors preventing reintroduction include herbivory, persistent environmental effects of invasive shrubs, poor performance of commercial Rhizobium inoculants, and competitive displacement associated with elevated nitrogen availability. To address these...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Tsang, Byron Yan
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2012-11-27
- Resource Type:
- Masters Thesis
-
- Description:
- Pollination is a reproductive necessity in the majority of the world’s flowering plants. Pollen limitation threatens plant reproduction, particularly in self-incompatible species. Although assessing pollen limitation usually requires pollen supplementation experiments, alternative methods support the findings of traditional pollen supplementation experiments.
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Tonietto, Rebecca K.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2009-04-28
- Resource Type:
- Masters Thesis
-
- Description:
- Pollination is a reproductive necessity in the majority of the world’s flowering plants. Pollen limitation threatens plant reproduction, particularly in self-incompatible species. Although assessing pollen limitation usually requires pollen supplementation experiments, alternative methods support the findings of traditional pollen supplementation experiments.
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Taira, Karen Elizabeth
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2013-10-29
- Resource Type:
- Masters Thesis
-
- Description:
- Two experiments were conducted to assess the germination, growth, and survival of Cirsium pitcheri Torr. ex Eaton T & G in the Chicagoland region. The first experiment involved growing seeds from various native populations to determine tolerance for the current Chicagoland climate. The second experiment tested three of the populations...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Staehlin, Benjamin
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2009-04-29
- Resource Type:
- Masters Thesis
-
- Description:
- Habitat fragmentation can alter the conditions of natural plant populations, introducing novel selective pressures. The ability of a population to respond to environmental change can be inferred by assessing the population’s genetic diversity and the heritability of traits thought to be under selection.
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Rivera, Ricardo
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2013-05-13
- Resource Type:
- Masters Thesis
-
- Description:
- Identifying factors that shape the spatial distribution of genetic variation within and among natural populations is crucial to understanding many population> and landscape>level processes. In this study, I characterize the strength and extent of spatial genetic structure in Oenothera harringtonii (Onagraceae), an insect>pollinated, gravity>dispersed herb endemic to the grasslands of...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Rhodes, Matthew Kent
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2013-09-26
- Resource Type:
- Masters Thesis
-
- Description:
- The tallgrass prairie once dominated much of the mid-western United States. Today, this highly productive system has been severely reduced, contributing to an array of environmental problems. The recent renaissance in natural area restoration and stewardship of the tallgrass prairie in the Chicago Wilderness region (Illinois, USA), especially in the...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Palmer, Corey
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2014-05-16
- Resource Type:
- Masters Thesis
-
- Description:
- Nitrogen (N) deposition can alter belowground microbial communities, especially ectomycorrhizal (ECM) fungi, resulting in a reduced ability of associated trees to access organic nutrients. This study tested whether N addition decreases ECM species richness and shifts ECM species composition across spatial scales in a subtropical slash pine (Pinus elliottii) plantation...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Ning, Chen
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2014-07-17
- Resource Type:
- Masters Thesis
-
- Description:
- The environmental and plant physiological correlates of plant growth and reproductive effort in the locally threatened orchid, Cypripedium candidum Muhl. ex Willd were examined in the context of a conceptual model of demographic and reproductive trade-offs, focusing on three Illinois populations. This study addresses the current status and long-term trends...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Nies, Anne
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2014-05-02
- Resource Type:
- Masters Thesis
-
- Description:
- Plant-aphid systems provide a valuable opportunity for studying the ecological consequences of land use change for interacting species. The North American tallgrass prairie has undergone severe reduction and fragmentation due to agricultural development. The prairie perennial Echinacea angustifolia, a model system for studying population-level effects of habitat fragmentation, hosts a...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Muller, Katherine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2013-05-15
- Resource Type:
- Masters Thesis
-
- Description:
- The introduction of non-native pests in general, and invasive plants in particular, has been receiving increasing interest by scientists, environmental groups, and to a certain extent the general public. Deleterious effects from the release of such alien species include threats to the environment, national economies, and even human health. The...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Madeja, Glen
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/06/2023
- Date Created:
- 2010-05-05
- Resource Type:
- Masters Thesis
-
- Description:
- Underutilized crops have the potential to economically benefit developing countries and to improve global food security. Breadfruit (Artocarpus altilis, Moraceae) is one such crop that can provide essential nutrients and requires relatively low-energy input to maintain compared to major crops. Humans have selected for many cultivars of breadfruit since its...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Laricchia, Kristen
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2014-12-05
- Resource Type:
- Masters Thesis
-
- Description:
- With increasing urbanization and creation of novel habitat types, green roofs can provide usable habitat for many species. To date, most research on green roofs has focused on minimizing the environmental impacts of buildings but little is known about the ecological services they provide. Previous research has shown that although...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Ksiazek, Kelly
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2011-06-17
- Resource Type:
- Masters Thesis
-
- Description:
- Hybridization is an important evolutionary pathway to genetic diversity, fitness, and ultimately to the emergence of new species. In contrast, hybridization between a native and an introduced species can lead to a loss of locally adapted gene complexes and ultimately to the extinction of the native. In the last decade,...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Huebner, Diane C.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2009-05-04
- Resource Type:
- Masters Thesis
-
- Description:
- Once widespread throughout southern Wisconsin, Quercus savannas are now one of the most endangered communities due to fire suppression and increasing landscape fragmentation. These plant communities are also highly susceptible to invasions by nonnative, exotic species. Understanding the mechanisms of exotic species invasion has been the focus of numerous studies....
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Hevey, Robert
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2014-04-24
- Resource Type:
- Masters Thesis
-
- Description:
- Fire is an agent of ecosystem change that has played a critical role in shaping the tallgrass prairie ecosystem. Periodic prescribed fire maintains the prairie by removing woody and invasive plant species, and stimulating growth of native herbaceous species. Fire’s beneficial effect on the tallgrass prairie aboveground community, in terms...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Gross, Rachel
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2008-10-20
- Resource Type:
- Masters Thesis
-
- Description:
- Due to concerns about population declines and habitat destruction, secretive marsh birds (SMBs) are of high conservation concern at state, regional, and national levels. Gaps in research on SMB habitat pose barriers to conservation and wetland restoration efforts.
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Glisson, Wesley James
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2012-10-04
- Resource Type:
- Masters Thesis
-
- Description:
- Restoration managers may select seed from a variety sources for their restoration projects. If the purchased seed is not of the local ecotype, land managers run the risk of poor establishment in the short-term and outcrossing between local and non-local ecotypes, genetic swamping, and the loss of local genetic diversity...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Gallagher, Megan Katherine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2011-05-24
- Resource Type:
- Masters Thesis
-
- Description:
- Understanding how root traits vary within and among species, and how they respond to heterogeneous environments, can provide important insight into functional plant attributes that influence plant survival in competitive environments. Selecting plant material with root traits that will support its survival in competitive environments may help improve the outcomes...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Foxx, Alicia
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2014-07-22
- Resource Type:
- Masters Thesis
-
- Description:
- The prairie grasses Andropogon gerardii and Sorghastrum nutans have seeds with awns that twist in response to changes in humidity. The humidity-sensitive, or hygroscopic, part of the awn twists, moving the bent, passive portion in an arc. This trait has been demonstrated to improve seedling recruitment in other grass species...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Drizin, Joshua Michael
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2013-05-16
- Resource Type:
- Masters Thesis
-
- Description:
- Trees in urban areas offer ecosystem services like carbon sequestration, storm water attenuation, reduction of energy used in buildings and wildlife habitat. Cities invest substantial funds and resources to maintain a healthy urban forest, and much research has been done to improve its resiliency and sustainability. Studies have been done...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Darling, Lindsay E.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 02/04/2019
- Date Created:
- 2013-09-04
- Resource Type:
- Masters Thesis
- Alternate Identifier:
- http://hdl.handle.net.DL/repo-pbmt-darling
-
- Description:
- Because long-chain n-alkanes (n-C21 to n-C37) are found in the epicuticular leaf waxes of all vascular plants and are stable, long-lived molecules, the study of their molecular and isotopic compositions stands to serve as a potentially powerful tool in the fields of modern chemotaxonomy and paleoecology. This study attempts to...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Bush, Rosemary T.
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2008-11-20
- Resource Type:
- Masters Thesis
-
- Description:
- Understanding the factors that drive the maintenance of polymorphisms in plant populations has long been of interest to evolutionary biology. Variation in floral traits has often been attributed to selection by pollinators, but recent evidence suggests that other biotic and abiotic agents may also contribute to floral trait differentiation. In...
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Braum, Anna
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 4/4/14
- Resource Type:
- Masters Thesis
-
- Description:
- Climate change, whether referring to historic ice ages or contemporary shifts in global climate patterns, has been linked to wide-ranging and regionally variable changes in biotic communities.
- Keyword:
- plant biology
- Subject:
- plant biology
- Creator:
- Booth, Emily
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/14/2017
- Date Modified:
- 11/08/2023
- Date Created:
- 2011-07-08
- Resource Type:
- Masters Thesis