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The Effects Of Suspended Sediment On The Aquatic Organisms Daphnia Magna And Pimephales Promelas, Neil Capper

All Theses

Land use change results in significant amounts of soil migrating into aquatic streams during storm events. This suspended sediment, even in the absence of adsorbed contaminants, may be a significant stressor to aquatic organisms. The data on ecological effects of suspended sediment has mainly focused on salmonids or ecosystem level consequences such as habitat alteration. Few studies have quantified physiologic effects of suspended solids on water column organisms. The purpose of this research was to determine the effects of suspended clay on Daphnia magna and Pimephales promelas. Results of 7 d toxicity tests with D. magna in natural and …

Interpretation Of Cone Penetration Tests In Cohesive Soils, Kwang Kyun Kim, Monica Prezzi, Rodrigo Salgado

JTRP Technical Reports

This report focuses on the evaluation of the factors affecting cone resistance measurement during cone penetration in saturated clayey soils and the application of the result to pile shaft capacity analysis. In particular, effects of drainage conditions around the cone tip were studied. Rate effects related to both drainage and shear strength dependence on loading rate were studied. In order to investigate the effects of drainage during penetration, penetration tests were performed with various velocities in the field and in a calibration chamber, and the obtained data were analyzed. For the field tests, two sites which have homogeneous clayey soil …

Installation Of A Lime Injection Barrier For The Remediation Of Acid Sulphate Soil Problems, Buddhima Indraratna, A. N. Golab, Laura J. Banasiak

Faculty of Engineering - Papers (Archive)

Oxidation of naturally occurring pyrite (FeS2) in certain low-lying clayey soils generates sulphuric acid, hence the term acid sulphate soils. A horizontal alkaline barrier was installed by radial grouting, for the purpose of remediating leachate from acid sulphate soils and preventing further oxidation. The current research relates to a large-scale field trial of this technique and the effect on the groundwater composition. In coastal Australia, a pyritic layer commonly exists in the soil at shallow depth that is at risk of oxidation, hence the main objective was to inject the barrier above the pyritic layer to (a) stop infiltration of …

Characterization And Property Studies Of Cyanate Ester/Organoclay Nanocomposites, Gang Huang

Theses and Dissertations

Five series of PT-30/organoclay (Cloisite 10A, Cloisite 30B, Nanomer I.28E, Nanomer I.30E and Nanomer I.44PA) composites were prepared and characterized. The dispersion of clay tactoids in PT-30 resin was studied by XRD and TEM. XRD analyses determined that the d-spacings of each nanoclays of these were expanded upon dispersing in the PT-30 matrix versus the as-received clay. TEM micrographs further demonstrated that the intercalation of clay layers by PT-30 occurred during the curing process. Histograms of clay tactoids distributions were generated based on the combination of XRD and TEM results. The glass transition temperatures (Tg) of selected PT-30/clay composites were …

Investigating The Fouling Behavior Of Reverse Osmosis Membranes Under Different Operating Conditions, Dhananjaya P. Niriella

USF Tampa Graduate Theses and Dissertations

This dissertation describes the investigation of the fouling of a reverse osmosis membrane under different operating conditions. A mass transfer model to predict the permeate flux decline is defined. These studies used kaolin clay and bentonite clay as the fouling particles. As the membranes, thin film Low fouling Composite 1 polyamide reverse osmosis flat sheet membranes were used. Baseline experiments using only kaolin in D.I. water were conducted. At an operating pressure of approximately 1,380 kPa, no flux decline was observed. These results established the effects of a membrane-particle interaction. For the fouling experiments with kaolin clay, experiments show a …

Non-Artist' Meeting With Clay: Doing And Reflecting, Tamar Bar-On

Expressive Therapies Dissertations

This dissertation explores non-artist creators’ verbal and non-verbal dialogues with an art material - clay - and their accompanying reflective narratives. The objectives o f this arts based and qualitative research are to gain further insight into two aspects of the creative process for non-artists: what the creator does with the art material and what, upon reflection, she says about the material, the process, and the product. In addition, the participants’ perception of correspondences between the way they work with the art material and how they approach other life and learning situations are explored. The interaction between thinking and doing …

Volcanism And Its Contribution To Mudrock Genesis, Warren Huff

Turkish Journal of Earth Sciences

Explosive eruptions from volcanoes are recorded in the stratigraphic record throughout the Phanerozoic. The most visible evidence of these eruptions is generally in the form of preserved tephra layers, and they appear to be concentrated in the stratigraphic record at times of active plate collision and concomitant high stands of sea level. The products of volcanic eruptions are lavas, tephra and gases, and whereas low-silica, anhydrous basaltic magmas are usually erupted in the form of lava flows high-silica, hydrous rhyolitic magmas are commonly explosively erupted as plinian and ultraplinian plumes, and associated pyroclastic flows. Fallout tephras may be preserved in …

Refurbishment Of Louisiana State University Calibration Chamber, Ardita Dushi

LSU Master's Theses

This thesis focuses on the refurbishment of Louisiana State University calibration chamber. The testing equipments were checked and connected together to complete the calibration chamber system. The data acquisition system was upgraded to National Instruments (NI) SCXI system. Therefore, a compatible computer program language in LabVIEW was developed. LabVIEW is a programming language developed by NI that reads the data from the instruments, displays the data in graphical form, calculates the desired parameters, commands the transducer to apply the required pressure to the specimen, and saves the data at the desired frequency. The Anisotropic Modified Cam Clay Model (AMCCM) following …

Love Of Nature, Marguerite Z. Ratliff

Theses and Dissertations

I stand in awe of nature's beauty. The natural forms and colors of my subjects inspire me to create paintings and three-dimensional clay pieces. As I marvel at God's handiwork, my soul is enriched by the pure sight of His canvas. The rich bright colors of the organic shapes compel me to visually interpret what I experience as an expression of who and what I am, and what I want others to see. My intent is to focus on the elements of the subject matter where the color, shape, and form dominate the space.

Textural Diversity, Paul Eskew

Theses and Dissertations

The sculptures I create reflect the elements of the natural world such as trees, the lumpy bush, clumps of turf. They have imperfect yet fascinating textures, picturesque in form, seemingly fractal in design, working together harmoniously to serve the aesthetic. My sculptures, like these natural shapes, are heavy or thicker toward the bottom and lighter toward the top, like a tree or stone. I strive to echo the mercurial, the animated natural surfaces, and the enticing vignettes one would experience on a woodland stroll.

Natural Selection, Jeffrey A. Vick

Theses and Dissertations

My thesis work is about imagination. I use the collaborative efforts of the viewer's mind and my sculptures, or specimens, to make associations of real life animals. I feel this engages the viewer and in turn invites them to inspect the work on closer level. This is my ultimate goal in the work, to take hold of the viewer's curiosity and have them examine the work on a closer level.

Light And Life, Christine Elizabeth Bishop

Theses and Dissertations

Faith and family are the aspects of my life that bring me joy and inspiration. This joy is represented as light and is present both literally and symbolically in all my work. I use light or a flame in my ceramic pieces to represent warmth, love, and spirituality. Images of nature are employed to suggest life. My most recent ceramic work embodies aspects of family and the joy of motherhood. My paintings focus on my family and are centered on the moments or memories that are significant to them. I try to paint the light of their lives.

Natural Flow, Holly Armstrong

Theses and Dissertations

Nature never ceases to amaze me with momentary observations of fluid energy: the purposeful curvature of a blue heron's neck; the pattern of water as it sweeps across a rock sculpted by that very motion; the changing light and shadows created as wind blows through tall grasses. The spark of beauty in these moments lies in the energy that causes this constant change. To capture this energy, either potential or kinetic, and embody it through textures and flow of mass, is my essential goal as an artist.

Assessment Of The Structural Development Of Resin Bonded Taphole Clay (Icsti 06), Sharon Nightingale, Lisa Wells, F W B U Tanzil, Jim Cummins, Brian J. Monaghan, K Price

Faculty of Engineering - Papers (Archive)

Resin in taphole clay provides good extrudability and strength at low temperatures. However, it also contains volatile matter that is lost on heating. The blast furnace taphole is subject to a large thermal gradient, leading to variation in the bonding and structure of the clay along the taphole’s length. This has a critical effect on properties. Effects of this variation in properties on furnace operations are not well understood. A simple laboratory test was devised to simulate the thermal gradient, and assess its effects on taphole clays.

Thermogravimetric tests were also conducted at different heating rates. Results of experiments are …

Fabrication, Characterization And Properties Of Hiercchically Ordered Nanocomposites, Avinash Dundigalla

LSU Doctoral Dissertations

The objectives of this research are to study the structure, morphology and properties of poly(ethylene-oxide) (PEO)-clay nanocomposites using various imaging techniques. Optical Microscopy, Scanning Electron Microscopy, Environmental Scanning Electron Microscopy and Atomic Force Microscopy are used to image structures on all length scales. Complementary scattering experiments are discussed along with preliminary differential scanning calorimetry and Fourier Transform Infrared spectroscopy results. In particular we investigated the multilayered structures of PEO-Laponite and PEO-Montmorillonite multilayered films made from solution. The shear orientation of a polymer-clay network in solution combined with simultaneous solvent evaporation leads to supramolecular multilayer formation in the film. The resulting …

Tinged With Fire, Margo J. Nolan

Theses and Dissertations

I have created art that has evolved from my own personal experiences. Life is capricious, and with the changes wrought by age, joy, and grief, I have found this self-referential work inevitable. Here, I have documented the journey that has brought me through personal wars, battles, and truces. I have come to believe that although my individual experiences may be unique, my responses to them are not. Loss and victory are universal.

Frame Of Mind, Jeffrey Brooks Warden

Theses and Dissertations

The creative process offers me an escape and tranquility worthy of sharing. When creating art, I reflect on the people, places, and things that move me. I convey my frame of mind through the brush to the canvas. The result is intense strokes of color that deliver clarity of emotion for others to experience. The intention of my work is to share a world that satisfies the eyes, mind, and soul. There is something about each piece that I hope will keep the viewer returning to absorb, contemplate, and enjoy.

Choice And Chance: Thoughts On My Journey, Leann Sasamoto

Theses and Dissertations

My love of learning, teaching, and providing creative spaces for people to connect informs my work and my life. For me, art is like life: messy, physical, and, if done with intent, beautiful. It is more about the process than the result; it is about recognizing that although we make choices, there are many things we cannot control; it is about being so present in the moment that everything else fades away. How I live, what I do, what I believe, and my art are all the same.

Making The Forest Together: Young Children Represent A Shared Experience In Clay, Anna Mary Golden

Theses and Dissertations

This thesis examines the strategies young children use to develop a common set of goals when collaborating on a group art work. Teachers at Sabot School spend a great deal of time in discussion of children's group work. By concentrating on one project in my preschool classroom, I reached a greater understanding of the way children work together on a group project. This understanding enriched my practice of teaching so that I could become a better facilitator of similar projects in the future. The information is valuable to me and the other Sabot School teachers when planning future group projects, …