Index Catalog // ScholarsArchive@OSU

Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

Creator:: Vancheeswaran, Sanjay
Abstract:: At Site-300, Lawrence Livermore National Laboratory (LLNL), CA, trichloroethene (TCE) is present along with tetraalkoxysilanes such as tetrabutoxysilane (TBOS) and tetrakis(2-ethylbutoxy) silane (TKEBS), as subsurface contaminants. Intrinsic transformation of TCE to cis-dichloroethene (c-DCE) was observed in the groundwater at locations co-contaminated with TBOS or TKEBS. Attenuation of TBOS and TKEBS...
Resource Type:: Masters Thesis
Full Text:: Transformation of TCE and c-DCE. Abstract approved: Abstract approved: At Site-300, Lawrence Livermore

Penetration resistance predictions for driven piling

Creator:: Hansen, Lawrence A.
Abstract:: This paper presents a method of predicting penetration resistance for driven piles, using known driving records for driving the same type piling in similar subsurface conditions. As known driving records are not always available to the analyst, a method was also investigated using soil data only. The analytical tools employed...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF LAWRENCE ALAN HANSEN for the

Evaluation of finite element techniques for soil reinforcement applications

Creator:: Berg, Ryan Robert
Abstract:: A literature review and a computer study are conducted to identify the requirements of finite element programs for the specific use of discrete analyses of reinforced soil structures. The utility of six commercially available programs are appraised with respect to the identified requirements. The results of the study are directed...
Resource Type:: Masters Thesis
Full Text:: reinforcement applications AN ABSTRACT OF THE THESIS OF Ryan Robert Berg for the degree of Master of Science

In-plane Creep Behavior of Cross-laminated Timber and Mass Plywood Panels: A Methodology to Evaluate the Long-term Performance of Post-Tensioned Mass Timber Walls

Creator:: Longman, Ryan P.
Abstract:: Post-tensioned (PT) self-centering shear walls were designed to reduce structural damage from seismic activity. However, these lateral force resistant systems experience post-tension loss negatively affecting the re-centering capability due to delayed deformations experienced by engineered wood products over time. The long-term mechanical response of mass-timber panels to in-plane PT loads...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Ryan P

Development of a method to elucidate biodegradation pathways of chlorinated one and two carbon compounds using a gas-permeable-membrane-supported methylotrophic biofilm

Creator:: Ryan, Kelly M.
Abstract:: A gas-permeable-membrane-supported (GPMS) biofilm consisting of methylotrophic bacteria was effective in degrading chlorinated methanes, ethanes, and ethenes. The biofilm was developed on a gas-permeable fabric (Goretex, W.L.Gore & Associates, Elkton, Maryland) that divided a reactor vessel into a liquid compartment and a gas compartment. Goretex is a nylon-backed teflon mesh...
Resource Type:: Masters Thesis
Full Text:: methylotrophic biofilm AN ABSTRACT OF THE THESIS OF Kelly M. Ryan for the degree of Master of Science in Civil

Characteristics of jet diffusers for ocean outfalls

Creator:: Ryan, William L.
Resource Type:: Masters Thesis
Full Text:: CHARACTERISTICS 0F JET t)IFFUSERS FOR OCEA OUTFALLS by WILLIAM LEE RYAN A THESIS submitted to OREGON

Scale effects on reinforced concrete beams strengthened for shear with discrete externally bonded carbon fiber-reinforced polymer U-wraps

Creator:: Dawson, Matthew Ryan
Abstract:: Current ACI design provisions for shear in reinforced concrete (RC) beams strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) U-wraps may not adequately account for the effect of scale. This paper describes tests of 6 geometrically scaled beams to identify possible scale effects of such beams. Results indicated that effective...
Resource Type:: Masters Thesis
Full Text:: THE THESIS OF Matthew Ryan Dawson for the degree of Master of Science in Civil Engineering

The effect of dissolved oxygen concentration on the activated sludge process

Creator:: Swanson, Gregory R.
Abstract:: Since the introduction of pure oxygen activated sludge systems in the late 1960's, proponents have claimed several advantages resulting from the elevated dissolved oxygen (DO) levels maintained. However, numerous comparative studies have failed to produce a consensus of professional opinion regarding the validity of these claimed advantages. The purpose of...
Resource Type:: Dissertation
Full Text:: Concentration on the Activated Sludge Process Abstract approved: Redacted for privacy K7fieth J. Williamson

Preliminary deployment and evaluation of geophone sensors for monitoring wave activity: GeoMoteShield

Creator:: Lathrop, Eve
Abstract:: This study focuses specifically on the investigation of a new, inexpensive geophone system and its application to monitor wave activity. Studies of seismic observations of coastal cliffs suggest that ground motions generated from local ocean waves may provide a surrogate to limited wave buoy data to quantify the wave contact...
Resource Type:: Honors College Thesis
Full Text:: :_____________________________________________________ Michael J. Olsen This study focuses specifically on the investigation of a new, inexpensive

Radar and Optical Remote Sensing of Submesoscale Frontal Features

Creator:: Simpson, Alexandra J.
Abstract:: The coastal region is home to many types of surface fronts that exist on a submesoscale (1-10 $km$). While in situ observations capture point or transect observations of frontal behavior subsurface, their complex spatial patterns can be well-captured using remote sensing techniques, which provide synoptic views of the ocean surface...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Alexandra J. Simpson

ScholarsArchive@OSU

Abiotic and biological transformation of TBOS and TKEBS, and their role in the biological transformation of TCE and c-DCE

Penetration resistance predictions for driven piling

Evaluation of finite element techniques for soil reinforcement applications

In-plane Creep Behavior of Cross-laminated Timber and Mass Plywood Panels: A Methodology to Evaluate the Long-term Performance of Post-Tensioned Mass Timber Walls

Development of a method to elucidate biodegradation pathways of chlorinated one and two carbon compounds using a gas-permeable-membrane-supported methylotrophic biofilm

Characteristics of jet diffusers for ocean outfalls

Scale effects on reinforced concrete beams strengthened for shear with discrete externally bonded carbon fiber-reinforced polymer U-wraps

The effect of dissolved oxygen concentration on the activated sludge process

Preliminary deployment and evaluation of geophone sensors for monitoring wave activity: GeoMoteShield

Radar and Optical Remote Sensing of Submesoscale Frontal Features

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